EP4328387A1 - Coupling device and mobile working machine - Google Patents

Abstract

A coupling device (40, 240, 440) for connecting an attachment (26) to a mobile work machine (10) has a mounting interface (60, 460) for mounting on a boom (22) of a mobile work machine (10), an attachment interface (62 , 462) for releasably receiving an attachment (26), which has a locking unit (80, 280, 480) for the attachment (26) that can be actuated by at least one fluid actuator (82, 282, 482), and one between the mounting interface (60 , 460) and the mounting interface (62, 462) arranged rotating section (66, 466) with a rotary drive (120) for generating a relative rotation between the mounting interface (60, 460) and the mounting interface (62, 462) about an axis of rotation (46, 446). The locking unit (80, 280, 480) has a housing (170, 370, 570) with at least one pressure medium supply connection (180, 380, 202, 402, 602), which is displaceable on a frame (140, 340, 540) of the mounting interface (62, 462) is arranged. The rotating section (66, 466) has a stator (122, 522) and a rotor (124, 524) which can be rotated about the axis of rotation (46, 446) relative to the stator (122, 522). The locking unit (80, 280, 480) can be rotated by the rotor (124, 524). A rotary feedthrough (146, 346, 546) is arranged in the rotating section (66, 466), which is coupled in a tubeless manner to the pressure medium supply connection (180, 380, 202, 402, 602) of the housing (170, 370, 570) for supplying pressure medium. A mobile work machine (10) is provided with such a coupling device (40, 240, 440) for coupling an attachment (26).

Description

The present disclosure relates to a coupling device for connecting an attachment to a mobile work machine, with a mounting interface for mounting on a boom of a mobile work machine, a mounting interface for releasably receiving an attachment, which has a locking unit for the attachment that can be actuated by at least one fluidic actuator, and with a rotating section arranged between the mounting interface and the mounting interface with a rotary drive for generating a relative rotation between the mounting interface and the mounting interface about an axis of rotation, the locking unit having a housing with at least one pressure medium supply connection which is displaceably arranged on a frame of the mounting interface, wherein the Rotating section has a stator and a rotor that can be rotated about the axis of rotation relative to the stator, and wherein the locking unit can be rotated by the rotor.

From the EP 3 964 650 A1 Such a coupling device is known. The known device has a hydraulic rotary feedthrough for fluids with a stator and a rotor arranged within a through opening of a drive housing of a rotary drive, the stator being radially supported at two ends within the through opening. In this way, the rotary feedthrough sits stable and well protected against tilting movements within the through opening.

A similar coupling device is from the EP 3 954 835 A2 known. The well-known coupling device serves as a quick coupler for attachments on excavators and the like. The known coupling device provides a rotational degree of freedom and a pivoting degree of freedom for an attachment. The coupling device comprises a carrying device for locating bolts of the attachment, with a first receptacle and a second receptacle being provided, which can securely grip and hold two spaced-apart locating bolts using a locking device with a cylinder unit which can be moved relative to a frame of the carrying device.

Coupling devices serve, for example, as quick couplers for attachments on mobile machines. In this way, the setup effort is reduced. Coupling devices can provide additional degrees of freedom, such as a rotation and/or a pivoting movement, which may not be available when the attachment is directly attached to an interface of the work machine.

The coupling devices regularly include a mounting interface with a locking unit that can be fluidically actuated with a pressure medium and which secures a recorded attachment at the mounting interface. For this purpose, the locking unit must be supplied with a pressure medium (for example hydraulic oil, compressed air or the like). However, if the coupling device provides a rotational degree of freedom, it must be ensured that the pressure medium can be supplied to the locking unit independently of a current rotational position.

Furthermore, it is conceivable to provide additional fluid channels and possibly other channels for transmitting (electrical) energy and/or signals at the cultivation interface. In this way, further degrees of freedom can be achieved in the attachment, for example in a gripper, pliers, a vibrating plate, a grinding tool, a hammer tool or the like. If necessary, attachments can be supplied with fluid and/or electrical energy. Furthermore, if necessary, communication with attachments is possible, for example for the purposes of control, signal transmission, data acquisition and the like.

The attachment interface includes, for example, a frame that carries the locking unit. The locking unit comprises, for example, a housing that is displaceable relative to the frame. The housing can accommodate one or more actuators, which are designed, for example, as cylinders. In this way, for example when using an actuator, both a locking element of a first receptacle and, if necessary, a locking element of a second receptacle can be controlled. If this housing now has a pressure medium supply connection, this pressure medium supply connection would also move relative to the frame of the mounting interface. This movement may take place obliquely (for example vertically) relative to the axis of rotation.

This must be taken into account when providing the pressure medium supply, energy supply and/or signal supply. In exemplary embodiments, the housing not only has at least one pressure medium supply connection for actuating the locking unit, but also one or more further connections that can be used to supply the attachment. This increases the effort required to provide the desired media.

Against this background, the present disclosure is based on the object of specifying a coupling device for connecting an attachment to a mobile work machine, which, taking into account the structural conditions at the attachment interface, ensures a safe supply of pressure medium and, if necessary, a supply of other media. In particular, the coupling device should reduce hose laying effort. The coupling device should comply with the given requirements Make efficient use of installation space when it comes to media provision. The coupling device should ensure robust and safe media provision, even in the event of heavy loads during operation.

This object is achieved in the coupling device mentioned at the outset in that a rotary feedthrough is arranged in the rotating section, which is coupled to the pressure medium supply connection of the housing without hoses for supplying pressure medium.

Precautions have therefore been taken so that the rotary feedthrough can be coupled to the housing without a hose, even if the housing of the locking unit is movable. In this way, secure transfer of media can be ensured even in the event of any relative movement between the housing and a frame of the mounting interface.

The rotary feedthrough is in particular fluidly coupled to the pressure medium supply connection in a tubeless manner. The rotary feedthrough communicates fluidly with the pressure medium supply connection of the housing of the locking unit, namely via a tubeless fluidic connection.

In particular, the rotary feedthrough is a multi-channel rotary feedthrough. The rotary feedthrough is used in particular to transfer fluids. This regularly includes one or more channels for transmitting hydraulic oil. However, it is also conceivable to transmit compressed air via one or more channels. In exemplary embodiments, the rotary feedthrough has at least one channel for compressed air transmission. In exemplary embodiments, the rotary feedthrough has at least one channel for transmitting electrical energy. In exemplary embodiments, the rotary feedthrough has at least one channel for signal transmission.

The absence of hoses at the interface between the rotary union and the locking unit increases functional reliability. Further leave Deformations/compressibilities along the lines there can be reduced if hoses are not used, which are generally more flexible than tubeless (rigid) connections. It goes without saying that, for example, even rigid pipes have minimal flexibility (elasticity) at high pressures. However, those skilled in the art will understand that such rigid piping is typically not flexible enough to accommodate relative movements between the involved components between which the lines extend.

The coupling device can be temporarily or permanently connected to a mobile machine via the assembly interface. This is usually done on a movable boom, such as an articulated arm. Accordingly, it is not excluded that the rotary feedthrough is coupled to flexible lines on the input side (from the direction of the articulated arm), for example with hose lines. At the same time, it cannot be ruled out that pressure fluid or other media are tapped at a connection at the mounting interface via flexible lines (e.g. hose lines). In this way, corresponding consumers on the attachment can be supplied. However, it is desired that at least the rotational degree of freedom of the coupling device includes a rotary feedthrough that is coupled in a tubeless manner to the housing of the locking unit (which can be displaced obliquely or perpendicularly to the axis of rotation).

In an exemplary embodiment, the coupling device comprises a quick coupling, in particular a fluidically/hydraulically actuated quick coupling. In an exemplary embodiment, the coupling device comprises a pivoting section in addition to the rotating section, so that both a rotational degree of freedom and a pivoting degree of freedom are provided.

The displaceability of the housing relative to the frame of the mounting interface refers, for example, to a compensating movement of the housing when a corresponding actuator moves to operate the locking unit. The actuator is, for example, a fluidic cylinder, usually a hydraulic cylinder. This compensating movement is, for example, a linear one Compensating movement relative to the frame of the locking unit, namely vertically, but at least obliquely, relative to the axis of rotation.

According to a further exemplary embodiment, the rotor comprises a slewing ring through which the rotary feedthrough extends. The slewing ring serves, for example, as a rotor of the rotating section that carries the mounting interface. The slewing ring is coupled to an actuator. The slewing ring has, for example, a recess in its center, which provides installation space for the rotary feedthrough. The rotating section is regularly designed to transmit high forces and moments. In an exemplary embodiment, a worm gear with worm and worm wheel is used for this purpose, with the worm wheel being designed as a ring. Other designs of the rotary drive are conceivable.

According to a further exemplary embodiment, the rotary feedthrough is oriented concentrically to the rotary section. In an exemplary embodiment, the rotary feedthrough is oriented concentrically to the slewing ring. In an exemplary embodiment, the rotary feedthrough is constantly oriented concentrically to the rotary section, with a central axis of the rotary feedthrough and the rotation axis of the rotary section being permanently aligned concentrically to one another.

According to a further exemplary embodiment, the housing of the locking unit is mounted floating on the frame of the mounting interface. For example, the housing can be moved relative to the frame via a suitable guide. This design makes cable routing more difficult if the rotary union does not follow this movement. Nevertheless, a tubeless fluidic connection is also advantageous here.

According to a further exemplary embodiment, the actuator has a piston which can be moved relative to the housing and which is mounted in the housing, in which a cylinder space for the piston is formed, the mounting interface having a first receptacle and a second receptacle which face away from one another, and wherein the housing has a first locking element when it is first recorded and is coupled to a second locking element in the second receptacle, in particular for its actuation. In other words, a single actuator can actuate a first locking element and a second locking element, which are arranged on receptacles of the locking unit facing away from one another. This regularly includes a compensating movement of the housing relative to the frame of the mounting interface.

It is understood that in the mounting interface, for example, a first pair of first receptacles and a second pair of second receptacles are provided, which are spaced apart from one another transversely to the longitudinal extent of the axis of rotation, the first pair for receiving a first coupling rod and the second pair for receiving a second Coupling rod of the attachment is formed. Such a design may include two actuators (two cylinders). As an example, a common housing is provided for the two actuators. It is also conceivable to provide a single actuator (cylinder) in a housing to control the locking elements of both pairs of receptacles.

In an exemplary embodiment, the piston of the actuator is attached to the frame of the mounting interface, in particular with its end facing away from the housing. Now when the actuator is actuated, this involves movement of the piston in the cylinder in the housing. If the piston is now fixed to the frame with regard to this degree of freedom of movement, the housing will move relative to the frame. For example, the movement of the actuator takes place perpendicular to the axis of rotation of the rotating section.

According to a further exemplary embodiment, the housing and the piston can be moved between a retracted state and an extended state in order to actuate the first locking element and the second locking element, in particular comprising a respective relative movement of the first locking element and the second locking element relative to the frame of the mounting interface. In this context, for example, the in the EP 3 954 835 A2 described locking device referenced. For example, the first locking element is moved along a longitudinal guide to the first coupling rod to be secured at the mounting interface. For example, the second locking element is moved along a pivot guide in order to secure the second coupling rod of an attachment at the attachment interface.

According to a further exemplary embodiment, at least one fluid-conducting pipe piece is arranged between the rotary feedthrough and the housing of the locking unit in order to compensate for movements of the housing relative to the frame of the mounting interface. In general terms, a first line section and a second line section are provided, which can be immersed in one another, with the immersion movement compensating for the movement of the housing and with the tightness of the fluid connection remaining guaranteed.

In particular, the pipe section is a rigid pipe section, at least a sufficiently stiff pipe section. The piece of pipe is not a (flexible) hose. The pipe section consists, for example, of metal materials. A hose usually (also) includes flexible, elastic materials. Flexible hoses with steel braiding are flexible within the meaning of the present disclosure. The pipe section is in particular fluidly connected to a channel of the rotary feedthrough. The pipe section can also be referred to as a hollow cylinder or hollow piston. The piece of pipe can also be referred to as a pipe section.

According to a further exemplary embodiment, the pipe section is coupled to the housing of the locking unit for the fluid line, the housing and the pipe section being displaceable relative to one another. For example, the compensating movement of the housing relative to the frame of the mounting interface can include a movement in the same direction and of the same magnitude relative to the pipe section, whereby the tightness of the fluid connection remains guaranteed.

According to a further exemplary embodiment, the housing and the pipe section are displaceable relative to one another, with the pipe section being fixed to the housing of the locking unit or to a connecting piece assigned to the rotary feedthrough. In principle, it is also conceivable to have the piece of pipe floating between the locking unit and the connecting piece assigned to the rotary union. According to this embodiment, the pipe section can immerse both in a recess in the locking unit and in a recess in the connecting piece.

According to a further exemplary embodiment, the pipe section is immersed at least in sections in a recess in the housing of the locking unit, with an immersion depth of the pipe section in the recess being variable depending on a position of the housing of the locking unit in relation to the frame of the mounting interface. This results in a secure, tubeless fluidic connection between the rotary feedthrough and the housing, even in the event of a compensating movement of the housing relative to the axis of rotation (corresponding to the central axis of the rotary feedthrough). The coupling between the pipe section and the recess includes suitable seals.

According to a further exemplary embodiment, the pipe section is immersed at least in sections in a recess of the connecting piece of the rotary feedthrough, with an immersion depth of the pipe section in the recess being variable depending on a position of the housing of the locking unit in relation to the frame of the mounting interface.

According to a further exemplary embodiment, the pipe section is fixed to the frame of the mounting interface at its end facing away from the housing of the locking unit, the pipe section having a longitudinal extension which is oriented parallel to the sliding movement of the housing of the locking unit. In this way, the pipe section can dip into the recess in the housing. The longitudinal extent of the pipe section is at least partially parallel to the sliding movement of the housing of the locking unit. In an exemplary embodiment, the longitudinal extent of the pipe section is perpendicular or substantially perpendicular to the axis of rotation of the rotating section. This refers at least to the section that dips into the recess in the housing.

In principle, it is also conceivable that the pipe section is designed as an extension on the housing, which dips into a corresponding recess of a connecting piece arranged on the frame of the mounting interface when there are relative movements between the housing and the frame.

According to a further exemplary embodiment, the pipe section is oriented coaxially to a pressure medium supply connection on the housing of the locking unit, so that the pressure medium supply connection, the pipe section and a recess assigned to the rotary feedthrough for receiving the pipe section are arranged in a fluid-conducting manner along a common longitudinal axis. This simplifies fluid guidance, in particular the design of corresponding channels. A coaxial orientation is also favorable with regard to the required overall height or width. In general, the required installation space can be reduced. If the fluid is guided in a straight line between the recess assigned to the rotary feedthrough and the pressure medium supply connection of the locking unit, deflections can be avoided. The effort required to create the fluid paths is reduced.

According to a further exemplary embodiment, a plurality of pipe pieces are arranged between the rotary feedthrough and the housing of the locking unit, the pipe pieces each being fluidly assigned to a channel of the rotary feedthrough, the housing of the locking unit having at least one pressure medium supply connection fluidically coupled to one of the channels for supplying fluid to the actuator and wherein the housing of the locking unit has at least one pressure medium supply connection for external fluid supply which is fluidly coupled to one of the channels.

In this way, the locking unit can be supplied with the pressure medium. A two-channel control of the locking unit is also conceivable, for example in the case of two actuators, when each of the two actuators is supplied separately via its own channel. However, it is also conceivable to provide pressure medium channels and other media channels for the attachment. For this purpose, the housing can have corresponding connections to which cables can be coupled.

According to a further exemplary embodiment, the rotary feedthrough has a central axis oriented parallel to the axis of rotation, wherein an axial distance between the axis of rotation and the central axis of the rotary feedthrough is variable depending on an operating state of the locking unit, in particular depending on a position of the housing. According to this embodiment, the rotary feedthrough can move together with the housing if compensating movements occur due to the actuation of the locking unit.

According to a further exemplary embodiment, the rotary feedthrough is designed as a multi-channel rotary feedthrough, with at least one channel of the rotary feedthrough serving to supply pressure medium to the locking unit of the attachment interface, and with at least one channel serving to supply pressure medium to a degree of freedom of the attachment. It is conceivable to provide at least one channel for providing electrical energy. It is conceivable to provide a channel for providing signal exchange.

The channels of the rotary feedthrough usually serve to transmit fluid energy, in particular hydraulic energy. In principle, the transmission of pneumatic energy is also conceivable. In exemplary embodiments, at least one channel of the rotary feedthrough is used to transmit electrical energy. In at least one exemplary embodiment, at least one channel of the rotary feedthrough is used to transmit signals. These can be sensor signals, control signals and the like.

According to a further exemplary embodiment, the coupling device further has a pivoting section arranged between the mounting interface and the mounting interface, in particular between the mounting interface and the rotating section, with a pivoting drive for generating a pivoting movement between the mounting interface and the mounting interface about a pivoting axis. In this way, the coupling device can provide both a rotational degree of freedom and an additional pivoting degree of freedom. The rotating section and the pivoting section are functionally arranged between the mounting interface and the mounting interface.

In an exemplary embodiment, the pivoting section of the assembly interface and the rotating section is interposed. In an exemplary embodiment, the rotating section is interposed between the pivoting section and the mounting interface. In an alternative embodiment, the rotating section is interposed between the mounting interface and the pivoting section, wherein the pivoting section is interposed between the rotating section and the mounting interface. The rotary feedthrough is assigned to the rotating section.

According to a further exemplary embodiment, the pivoting section comprises a pivoting axis inclined relative to the axis of rotation, in particular a pivoting axis oriented perpendicular to the axis of rotation, the pivoting section being coupled to the pivoting axis via a pivoting arm and pivotable about the pivoting axis, the pivoting drive being located between a coupling point at the assembly interface and a coupling point on the swivel boom, both coupling points being offset from the swivel axis and from each other, and wherein the swivel axis is arranged at least in a neutral position of the swivel drive between the assembly interface and the coupling point on the swivel boom.

This results in an overall compact and yet powerful design of the coupling device. The neutral position of the swivel drive corresponds, for example, to a position in which the axis of rotation of the swivel drive is oriented perpendicular to a plane through the fastening receptacles of the mounting interface. With regard to the mounting interface, reference is made, for example, to a plane that is defined by fastening receptacles of the mounting interface. In an exemplary embodiment, the pivot axis is oriented at least in the neutral position between the mounting interface and both coupling points of the pivot drive.

The swivel drive is designed, for example, as a cylinder, with a coupling point being provided on the cylinder housing and another coupling point being provided on the piston rod which can be moved relative to the cylinder housing. The swivel section includes, for example, two swivel drives. In an exemplary embodiment, the two swivel drives of the coupling device are oriented in opposite directions, with the swivel drives be driven in opposite directions or in opposite directions in order to pivot the mounting interface relative to the mounting interface.

According to a further aspect, the present disclosure relates to a mobile work machine with a chassis, a structure carried by the chassis, and at least one articulated boom which carries a coupling device according to at least one of the embodiments described herein for coupling an attachment.

The boom is designed, for example, as an articulated arm. In an exemplary embodiment, the boom is movable together with the body relative to the chassis (for example slewing ring between the chassis and body). In an exemplary embodiment, the boom is movable, in particular pivotable, relative to the structure. For example, the work machine has on-board hydraulics with a hydraulic pump, pressure generator and/or pressure accumulator. In this way, fluid energy can be provided to the coupling device and, if necessary, to the attachment via corresponding lines that extend along the boom.

The mobile work machine is, for example, an excavator (crawler excavator, mobile excavator and the like). Mobile work machines can include construction machinery, agricultural and forestry vehicles. Examples include wheel loaders, excavators, tractors, generally towing vehicles and trailers. Mobile work machines can generally be equipped with their own drive. Designs of mobile work machines that do not have their own drive are also conceivable.

Various types of attachments are known, for example spoons, shovels, grippers, scissors, magnets, vibrating plates, grinding heads, milling machines and the like. Attachments can have their own degrees of freedom, for example for opening and closing a gripper or demolition pliers.

It is understood that the features of the disclosure mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present disclosure.

Fig. 1:

eine Seitenansicht einer beispielhaften Ausgestaltung einer mobilen Arbeitsmaschine in Form eines Raupenbaggers;

Fig. 2

eine perspektivische Ansicht einer Ausführungsform einer Ankoppelvorrichtung;

Fig. 3:

eine vergrößerte geschnittene Ansicht der Ankoppelvorrichtung gemäß Fig. 2;

Fig. 4:

eine teilweise geschnittene, frontale Ansicht der Ankoppelvorrichtung gemäß den Figuren 2 und 3, wobei die Schnittorientierung der Linie IV-IV in Fig. 5 folgt;

Fig. 5:

eine teilweise geschnittene Seitenansicht der Ankoppelvorrichtung gemäß Fig. 4, wobei die Schnittorientierung der Linie V-V in Fig. 4 folgt;

Fig. 6:

eine weitere perspektivische Ansicht der Ankoppelvorrichtung gemäß den Figuren 2-5, in einer Orientierung von unten her;

Fig. 7:

eine perspektivische Ansicht einer weiteren Ausführungsform einer Ankoppelvorrichtung, die gegenüber der Ankoppelvorrichtung gemäß den Figuren 2-6 teilweise modifiziert ist;

Fig. 8:

eine geschnittene Seitenansicht der Ankoppelvorrichtung gemäß Fig. 7;

Fig. 9:

eine weitere perspektivische Ansicht der Ankoppelvorrichtung gemäß den Figuren 7 und 8, in einer Orientierung von unten her;

Fig. 10:

eine perspektivische Ansicht einer weiteren Ausführungsform einer Ankoppelvorrichtung; und

Fig. 11:

eine vergrößerte geschnittene Ansicht der Ankoppelvorrichtung gemäß Fig. 10.

Further features and advantages result from the following description of several preferred exemplary embodiments with reference to the drawings. Show it:

Fig. 1:

a side view of an exemplary embodiment of a mobile work machine in the form of a crawler excavator;

Fig. 2

a perspective view of an embodiment of a coupling device;

Fig. 3:

an enlarged sectional view of the coupling device according to Fig. 2 ;

Fig. 4:

a partially sectioned, frontal view of the coupling device according to Figures 2 and 3 , where the cutting orientation of line IV-IV in Fig. 5 follows;

Fig. 5:

a partially sectioned side view of the coupling device according to Fig. 4 , where the cutting orientation of the line VV in Fig. 4 follows;

Fig. 6:

a further perspective view of the coupling device according to Figures 2-5 , in an orientation from below;

Fig. 7:

a perspective view of a further embodiment of a coupling device, which is compared to the coupling device according to Figures 2-6 is partially modified;

Fig. 8:

a sectional side view of the coupling device according to Fig. 7 ;

Fig. 9:

a further perspective view of the coupling device according to Figures 7 and 8th , in an orientation from below;

Fig. 10:

a perspective view of a further embodiment of a coupling device; and

Fig. 11:

an enlarged sectional view of the coupling device according to Fig. 10 .

Fig. 1 shows a mobile work machine designated 10 using a schematically simplified representation. In the exemplary embodiment, the work machine 10 is designed as an excavator, for example as a crawler excavator. Other designs are nevertheless conceivable.

The work machine 10 includes a chassis 12 which carries a structure 14. In exemplary embodiments, the structure 14 is rotatable relative to the chassis 12 about a vertically oriented axis. The structure 14 houses, for example, a hydraulic unit 16, which is used to supply pressure medium. This is usually hydraulic oil, which is pressurized by the hydraulic unit 16. It goes without saying that the hydraulic unit 16 can also have a pressure accumulator.

In the exemplary embodiment, an articulated arm 20 with several degrees of pivoting freedom is mounted on the structure 14. The articulated arm 20 can also generally be referred to as a boom 22. The articulated arm 20 extends between the structure 14 and an attachment 26. In the exemplary embodiment, the attachment 26 is designed as a shovel 28. This is not to be understood as limiting. Other types of attachments 26 are conceivable.

In principle, it is conceivable to attach the attachment 26 directly to the boom 22 of the mobile work machine 10. The attachment 26 usually has connecting elements, for example in the form of connecting bolts and/or coupling rods. At the end of the boom 22 facing away (kinematically) from the structure 14, a suitable interface is regularly provided for directly receiving the attachment 26. However, such direct assembly is not suitable for quickly changing the attachment 26. Furthermore, such direct assembly does not allow any additional degrees of freedom of movement (rotation and/or pivoting) between the attachment 26 and the boom 22.

So-called quick couplers are known, which are installed as an interface between the boom 22 and the attachment 26. Such a quick coupler is, for example, from the EP 3 954 835 A2 known.

In the exemplary embodiment according to Fig. 1 A coupling device 40 serves as a quick coupler. The coupling device 40 is designed, for example, as a so-called tiltrotator 42, without this being to be understood as restrictive. Accordingly, at least in exemplary embodiments, the coupling device 40 can provide an axis of rotation 46 (compare the curved double arrow 48 to illustrate the rotational movement) between the attachment 26 and the boom 22. In exemplary embodiments, a pivot axis 50 (compare the curved double arrow 52 to illustrate the pivoting movement) is also provided between the attachment 26 and the boom 22. In this way, the range of uses of the mobile work machine 10 is broadened if suitable attachments 26 are installed. Overall, the performance potential of the mobile work machine 10 can increase.

With reference to the Figures 2-6 Various aspects of the design of a coupling device designated overall by 40 are illustrated. With reference to the Figures 7-9 Various aspects of the design of a coupling device designated overall by 240 are illustrated. The coupling devices 40, 240 are similar in terms of their basic structure, so that the design according to Figures 2-6 to explain the using the Figures 7-9 illustrated embodiment can be used. To describe the embodiments shown in FIGS. 7-9, reference is made in part to those already in connection with Figures 2-6 introduced reference numbers are used.

Fig. 2 shows a perspective view of the coupling device 40. To illustrate the state mounted on the boom 22 of the work machine 10, see Fig. 1 referred. The the Fig. 2 The underlying orientation is a view obliquely from above, provided that the coupling device 40 is placed on the ground in this orientation (with the mounting interface 62 described below) or at least faces the ground. It goes without saying that completely different orientations can also be adopted when operating the work machine 10. Hence the orientation mentioned to be understood as a reference for the description without this being limiting.

Fig. 3 shows a longitudinal section through the coupling device 40 according to Fig. 2 , where the representation in Fig. 3 something compared to the representation in Fig. 2 is enlarged. Fig. 4 shows a frontal view of the coupling device 40 in a half section, compare section line IV-IV in Fig. 5. Fig. 5 shows a partial side section view, compare the section line VV in Fig. 4 . Fig. 6 shows a partial perspective view of the coupling device 40 on one side of the mounting interface 62, which faces away from the boom 22 in the assembled state of the coupling device 40.

The ones in the Figures 2 and 3 The coupling device 40 shown in perspective provides at least one axis of rotation 46 (arrow 48 for the rotational movement) and, at least in exemplary embodiments, also a pivot axis 50 (arrow 52 for the pivoting movement). In the exemplary embodiment, the rotation axis 46 and the pivot axis 50 are oriented perpendicular to one another.

In functional terms, the coupling device 40 has different sections. In the exemplary embodiment, this includes a mounting interface 60 for attachment to the boom 22 ( Fig. 1 ) and a mounting interface 62, on which the attachment 26 ( Fig. 1 ) can be secured captively. Between the mounting interface 60 and the mounting interface 62, at least one rotating section 66 is provided, which provides the axis of rotation 46. At least in exemplary embodiments, a pivot section 64 is also provided, which provides the pivot axis 50. In the exemplary embodiment according to Fig. 2 the rotating section 66 is arranged between the mounting interface 62 and the pivoting section 64. Accordingly, the pivoting portion 64 is arranged between the mounting interface 60 and the rotating portion 62.

The mounting interface 60 includes a mounting support 70 with fastening receptacles 72, 74, via which fastening to the boom 22 takes place. The mounting support 72 can comprise two sections offset from one another, each of which is provided with a fastening receptacle 72, 74. For differentiation purposes, these can be Sections are referred to as right side and left side. This results in a favorable application of force and the ability to transmit force/torque improves. In an exemplary embodiment, the two sides of the mounting interface 60 are designed symmetrically to the pivot axis 50. In an exemplary embodiment, the mounting interface 60 is firmly bolted to the boom 22. However, it is also conceivable to connect the assembly interface 60 to the boom 22 via a hydraulically actuated coupling or quick coupling.

The attachment interface 62 includes a locking unit 80 with at least one actuator 82 (in Fig. 2 obscured, compare in particular Fig. 5 and Fig. 6 ). The actuator 82 is used to operate the attachment interface 62. The actuator 82 is designed, for example, as a cylinder that is functionally coupled to a first receptacle 84 and a second receptacle 86. In this way, the first receptacle 84 and the second receptacle 86 can be brought into a locking position and/or a release position by the actuator 82. In this context, reference is again made to the revelation of EP 3 954 835 A2 referred.

The mounting interface 62 or its locking unit 80 can comprise two sections offset from one another, each of which is provided with receptacles 84, 86. For purposes of distinction, these sections may be referred to as the right side and the left side. This results in a favorable application of force and the ability to transmit force/torque improves. In an exemplary embodiment, the two sides of the mounting interface 62 are designed symmetrically or substantially symmetrically to the axis of rotation 46. In an exemplary embodiment, each of the two sides has a corresponding actuator 82. In an exemplary embodiment, a common actuator 82 is provided for both sides. The in Fig. 3 The half-section shown in perspective illustrates one side (one half) of the mounting interface 60 and the mounting interface 62.

In the exemplary embodiment, the pivoting section 64 comprises a pivoting drive 90. The pivoting drive 90 is designed to pivot a pivoting bridge 92 of the pivoting section 64 about the pivoting axis 50 relative to the mounting support 70 of the mounting interface 60, compare the curved double arrow 52 in the Figures 2 and 3 . The pivot drive 90 comprises at least one actuator 96. In the exemplary embodiment, the pivot drive 90 comprises two actuators 96, between which the axis of rotation 46 extends. The at least one actuator 96 is designed, for example, as a cylinder. Accordingly, the at least one actuator 96 can be moved between a retracted state and an extended state.

The swivel bridge 92 includes at least one swivel boom 100, which carries a coupling point 104. The mounting support 70 includes at least one support arm 102, which carries a coupling point 106. The at least one actuator 96 is coupled to the pivoting boom 100 via the coupling point 104 and to the support arm 102 via the coupling point 106. In this way, when the actuator 96 is retracted and extended, there is a relative movement between the coupling points 104, 106 and consequently between the pivoting arm 100 and the support arm 102. This results in a pivoting movement between the mounting support 70 of the mounting interface 60 and the pivoting bridge 92 of the pivoting section 64 The pivoting movement takes place around the pivot axis 50, compare the in Fig. 3 Swivel bearing 110 shown in section.

In an exemplary embodiment, the pivoting section 64 also has two sides, each with an actuator 96, between which the axis of rotation 46 extends. This results in a favorable application of force and the ability to transmit force/torque improves. The swivel bridge 92 accordingly comprises two swivel arms 100, one of which has a coupling point 104 for coupling the actuator 96. In the exemplary embodiment, the mounting support 70 accordingly also has two support arms 102 facing away from one another, each with a coupling point 106 for coupling the actuator 96. In the exemplary embodiment according to Figures 2-6 the two actuators 96 of the swivel drive 90 are oriented in opposite directions. A pivoting movement about the pivot axis 50 occurs when one of the two actuators 96 is retracted and the other is extended. This is not to be understood as limiting.

The rotary section 66 includes a rotary drive 120. By means of the rotary drive 120, a rotor 124 can be rotated about the rotary axis 46 relative to a stator 122 (also referred to as the base of the rotary section), compare the curved one Double arrow 48. The stator 122 is connected to the swivel bridge 92 in the exemplary embodiment, compare Fig. 3 . The rotor 124 includes a slewing ring 130, which is designed, for example, as a worm wheel. The slewing ring 130 surrounds the axis of rotation 46 and is open in its center. The stator 122 includes an actuator 132, which includes, for example, a worm or worm shaft that engages the slewing ring 130. The actuator 132 may also include a suitable drive motor for the screw. The actuator 132 can rotate the rotor 124 about the axis of rotation 46 relative to the stator 122.

In the exemplary embodiment according to Figures 2-6 the stator 122 is provided as a rotating base at the swivel bridge 92 of the swivel section 64. The rotor 124 is rotatably mounted on the swivel bridge 92. When the coupling device 40 pivots about the pivot axis 50, the rotating section 66 is also pivoted. The rotor 124 is firmly coupled to a frame 140 of the mounting interface 62, compare again Fig. 3 . Accordingly, the mounting interface 62 is rotated with the locking unit 80 when the rotor 124 of the rotary drive 120 is rotated relative to the stator 122. The rotor 124 is arranged concentrically to the axis of rotation 46.

The rotor 124 of the rotary drive 120 is designed as a slewing ring 130. Accordingly, 124 installation space is available in the center of the rotor. This installation space is used to supply the mounting interface 62 with pressure fluid (hydraulic oil, compressed air) and other media. For this purpose, a rotary feedthrough 146 is provided, which in the exemplary embodiment according to Figures 2-6 is oriented with its central axis concentric to the axis of rotation 46. The rotary feedthrough 146 allows the provision of various media even in the event of a relative rotation between the mounting interface 62 and the mounting interface 60 about the axis of rotation 46. It is understood that this can also include control lines for the provision of pressure medium, for example for controlling valves.

In the exemplary embodiment, the rotary feedthrough 146 extends at least in sections through the cavity provided by the rotating ring 130. In this way, the rotary feedthrough 146 is well protected against external influences. At an end of the rotary union facing away from the mounting interface 62 146, a connecting piece 148 is provided in the exemplary embodiment, which serves to couple various (particularly flexible) lines to an input side of the rotary feedthrough 146. The connecting piece is, for example, connected in a rotationally fixed manner to the stator 122 of the rotary drive 120 via a guide plate 152. In this way, the connecting piece 148 is not moved relative to the stator 122 when the rotor 124 (slewing ring 130) rotates.

The rotary feedthrough 146 includes a fixed part 156 and a rotating part 162. The fixed part 156 can also be referred to as a stator. The rotating part 162 can also be referred to as a rotor. In the exemplary embodiment, the fixed part 156 is formed in a center 158 of the rotary feedthrough. The rotating part 162 is formed by a jacket 164. It goes without saying that a reverse assignment (stator in the jacket and rotor in the center) is also conceivable. In the exemplary embodiment, the jacket 164 rotates together with the mounting interface 62 when rotating about the axis of rotation 46.

The rotating part 162 (jacket 164) of the rotary feedthrough 146 is directly or indirectly coupled to the rotor 124 of the rotary drive 120 of the rotary section 66, in particular connected to the rotor 124 in a rotationally fixed manner. The fixed part 156 (center 158) of the rotary feedthrough 146 is directly or indirectly coupled to the stator 122 of the rotary drive 120 of the rotary section 66, in particular connected to the stator 122 in a rotationally fixed manner. In this way, the desired media can be provided independently of rotation about the axis of rotation 46.

In the exemplary embodiment, the connecting piece 148 of the rotary feedthrough 146 has a plurality of channels 166, which are continued in the fixed part 156. Circumferential grooves are formed between the fixed part 156 and the rotating part 162 as part of the media guide, which allow the media to be transferred between the fixed part 156 and the rotating part 162 regardless of a given relative rotation between the parts 156, 162.

In the exemplary embodiment, the rotary feedthrough 146 is oriented concentrically to the axis of rotation 46 of the rotary section 66. This is accomplished, for example, by positioning the jacket 164 accordingly. The concentric alignment of the rotary feedthrough 146 is independent of a current position of the locking unit 80. It should be noted that in the exemplary embodiment shown, the locking unit 80 has a housing 170 which houses the at least one actuator 82. The housing 170 is not arranged in a stationary manner with respect to the rotary feedthrough 146. The housing 170 is a target for media routing via the rotary feedthrough 146.

The jacket 164 is connected directly or indirectly to the frame 140 of the mounting interface 62 via a connecting piece 172. The connecting piece 172 houses one or more fluid paths 176, possibly also one or more other media paths. The connecting piece 172 establishes a line connection between the rotary feedthrough 146 and the housing 170. By way of example, the at least one fluid path 176 of the connecting piece 170 is coupled to a pressure medium supply connection 180 of the housing 170 of the locking unit 80.

For fluid guidance, a pipe section 182 is provided, which provides a fluid connection between the connecting piece 172 and the pressure medium supply connection 180 of the housing 170. For this purpose, the pipe section 182 in the exemplary embodiment has one end immersed in a recess 184 in the housing 170. The other end of the pipe section 182 is accommodated in a seat 186 on the connecting piece 172. It goes without saying that a reverse assignment is also conceivable, in which the pipe section 182 sits in the housing 170. Furthermore, it is also conceivable that the pipe section 182 is placed over a socket (instead of being immersed in a recess).

The pipe section 182 can also be referred to as a hollow cylinder or hollow piston. It is understood that the pipe section 182 can also be designed integrally with the connecting piece 172 or alternatively integrally with the housing 170. Accordingly, the pipe section 182 can also be a channel section (for example in the form of a nozzle) that is integrated into another part.

When the locking unit 80 is actuated to lock or unlock the receptacles 84, 86, the housing 170 is moved relative to the frame 140 of the mounting interface 62 by the actuation of the at least one actuator 82. As an example, there is a sliding movement of the housing 170, compare a double arrow marked 188 in Fig. 3 . This sliding movement of the housing 170 is inclined relative to the axis of rotation 46, for example perpendicular to the axis of rotation 46. However, the rotary feedthrough 146 is oriented concentrically to the axis of rotation 46. Accordingly, the pipe section 182 is designed to compensate for the sliding movement 188 of the housing 170. In the exemplary embodiment, the distance between the housing 170 and the connecting piece 172 changes.

This distance can be compensated for by a relative movement of the pipe section 182 in the recess 184 in the housing 170. In other words, the immersion depth of the pipe section 182 in the recess 184 changes during a sliding movement 188 of the housing 170. In general terms, a first line section and a second line section are provided, which can be immersed in one another, the immersion movement compensating for the sliding movement 188 of the housing 170. With the help of this design, a tubeless fluid flow between the rotary feedthrough 146 and the housing 170 is possible. In other words, flexible hoses for bridging the sliding movement 188 of the housing 170 can be dispensed with. A sufficiently rigid line routing between the rotary feedthrough 146 and the housing 170 can be achieved.

The Figures 4 and 5 they already show using the Figures 2 and 3 illustrated coupling device 40 in an at least partially sectioned view with different orientations. In Fig. 4 is again the functional division of the design of the coupling device 40 along the extension between the boom 22 and the attachment 26 ( Fig. 1 ) indicated by the curly brackets 60 (mounting interface), 64 (swivel section), 66 (rotating section) and 62 (mounting interface).

The frontal view in Fig. 4 illustrates the at least partially symmetrical design of the coupling device 40. In the Figures 2-5 is the coupling device 40 shown in a neutral position. There are no significant deflections either along the axis of rotation 46 or along the pivot axis 50. In the neutral position, the axis of rotation 46 is oriented perpendicular to a fastening plane 192, which extends through the centers of the fastening receptacles 72, 74, compare Fig. 4 . In other words, the rotation axis 46 is not pivoted out of the neutral position by a pivoting movement about the pivot axis 50.

The pivot axis 50 is in Fig. 4 perpendicular to the view plane, compare the projected side view in Fig. 5 . A plane 194 perpendicular to the axis of rotation 46 through the pivot axis 50 is in the Figures 4 and 5 shown. Furthermore, in Fig. 4 another plane 196 is shown, which intersects the coupling point 104 of the swivel drive 90 at the swivel arm 100 of the swivel bridge 92 and is oriented perpendicular to the axis of rotation 46. In the neutral position according to Figures 54, the planes 192, 194 and 196 are parallel to one another. In a position at least partially deflected from the neutral position about the pivot axis 50, the planes 194, 196 are inclined relative to the plane 192.

In the neutral position, the pivot axis 50 in the exemplary embodiment shown is arranged between the fastening plane 192 and the coupling point 104 on the pivot boom 100. This is reflected in the fact that level 194 is located between levels 192 and 196. When viewed along the axis of rotation 46, the pivot axis 50 is between the fastening receptacles 72, 74 of the mounting interface 60 and the coupling point 104 and possibly also the further coupling point 106 (see Fig. 2 ) arranged, at least in the neutral position.

Fig. 4 further shows that the housing 170 of the locking unit 80 can extend between the two actuators 82 (or connecting them) in a design with two actuators 82. In other words, both actuators 82 can be supplied with a pressure medium via a pressure medium supply connection 180 of the housing 170. In an exemplary embodiment, a separate pressure medium supply connection 180 is provided for each of the two actuators 82. In an exemplary embodiment, a common pressure medium supply connection 180 is provided for both actuators 82.

In Fig. 4 202 is also an external connection in the housing 170. The connection 202 is used, for example, to couple a fluid supply line of an attachment 26. It is understood that several external connections 202 can be provided on the housing 170. The fluid routing/channel routing within the housing 170 or within the rotary feedthrough 146 with connecting piece 148 is not shown in detail for reasons of illustration. The same applies to any flexible lines that are coupled to the connector 148 (inlet of the channels 166) or the housing 170 (connectors 202).

According to the side view Fig. 5 The section shown in section follows the line VV in Fig. 4 . The sectional plane illustrates an exemplary embodiment of an actuator 82 of the locking unit 80. In the exemplary embodiment, the actuator 82 is integrated into the housing 170 of the locking unit 80. The locking unit 80 includes the first receptacle 84 and the second receptacle 86. In the first receptacle 84, a first coupling rod 210 of an attachment 26 ( Fig. 1 ) are recorded and saved. A second coupling rod 212 of the attachment 26 can be received and secured in the second receptacle 86. A first locking element 214 is used to secure the position in the first receptacle 84. A locking element 216 is used to secure the position in the second receptacle 86. In the exemplary embodiment, the first locking element 214 is a locking slide that can be moved in translation. In the exemplary embodiment, the second locking element 216 is a locking lever that is pivotable. This is not to be understood as limiting.

The actuator 82 is operatively coupled to both the first locking element 214 and the second locking element 216 to actuate both locking elements 214, 216. In the exemplary embodiment, this includes a sliding movement of the housing 170, see the double arrow 188. By way of example, the actuator 82 includes a piston 220 which is arranged in a cylinder space 222. The piston 220 is followed by a piston rod 226, which is mounted (directly or indirectly) on the frame 140 of the locking unit 80 at a bearing point 228.

When the piston 220 moves relative to the cylinder space 222 (for example caused by pressure medium flowing into the cylinder space 220), the housing 170 is displaced relative to the frame 140 in the exemplary embodiment because the piston 220 is supported directly or indirectly on the frame 140 via its piston rod 226. This movement is caused by the in Fig. 3 shown pipe section 182 balanced, which can dip into the recess 184 in the housing 170. Accordingly, a movement of the housing 170 relative to the frame 140 is possible even with tubeless fluid guidance between the connecting piece 148 and the housing 170.

Fig. 6 shows the design of the locking unit 80 with two actuators 82, which are arranged in the housing 170, based on a perspective view of an underside of the coupling device 40. The actuators 82 are in Fig. 6 at least partially covered by the housing 170 and therefore indicated by dashed lines. Likewise, a plural (in Fig. 6 five) of pressure medium supply connections 180 in the housing 170, each of which is assigned a pipe section 182 arranged in the connecting piece 172. For explanation, compare also the perspective sectional view in Fig. 3 . With the in Fig. 6 In the configuration shown, a plurality of fluid channels can be provided. These can be used to control the actuators 82, but also for further degrees of freedom, for example in the attachment 26. The arrow 188 in Fig. 6 indicates the resulting sliding movement of the housing 170 as the actuators 82 move between a retracted and an extended state.

With reference to the Figures 7-9 as well as with additional reference to those already based on the Figures 2-6 Illustrated embodiment shows a further embodiment of a coupling device designated overall by 240. In the Figures 7-9 For reasons of illustration, a mounting interface with a mounting bracket was omitted from the illustration of the coupling device 240. Therefore, the pivoting section is not shown in its entirety. However, both a mounting section and a pivoting section can easily be provided in the coupling device 240. Compare the design according to Figures 2-6 .

The coupling device 240 is basically previously described with a mounting interface 62 for coupling an attachment 26 and a rotating section 66 provided. The mounting interface 62 has first recordings 84 and second recordings 86. The rotating section 66 is coupled to a pivoting bridge 92, which in the exemplary embodiment carries two pivoting sections 100 that face away from the mounting interface 62. The rotating section 66 has a rotary drive 120, see also the illustration of the slewing ring 130 and actuator 132 in Fig. 8 .

To compensate for rotational movements about the axis of rotation 46, a rotary feedthrough 346 is provided, which carries a connecting piece 348 at its end facing away from the mounting interface 62. The rotary feedthrough 346 extends through the ring 130 of the rotary drive 120. In the exemplary embodiment, the rotary feedthrough 346 has a fixed part 356 and a rotating part 362. The rotary feedthrough 346 protrudes through a recess 354 in a guide plate 352 as it extends towards the connecting piece 348. In the exemplary embodiment, the guide plate 352 is arranged in a rotationally fixed manner at an end of the rotating section 66 facing away from the mounting interface 62, adjacent to the slewing ring 130. In Fig. 7 it is further indicated that the connecting piece 348 of the rotary feedthrough 346 is displaceably mounted in at least one guide 360 of the guide plate 352. In the exemplary embodiment, two mutually parallel guides 360 are provided, into which the connecting piece 348 projects, for example with at least one guide bolt.

The Figures 8 and 9 illustrate that the rotary feedthrough 346, in particular its rotating part 362, is firmly connected to a housing 370 of a locking unit 280 for actuating the mounting interface 62. In this way, pressure medium supply connections 380 of the housing 370 can be supplied with pressure medium and other media. When the locking unit 280 is actuated, the housing 370 is displaced, see in the Figures 8 and 9 double arrows marked 388. Due to the direct coupling of the rotary feedthrough 346 with the housing 370, the rotary feedthrough 346 is accordingly also moved with the connecting piece 348 in the recess 354 or the guides 360 of the guide plate 352, in particular moved translationally (perpendicular to the axis of rotation 46).

The rotary feedthrough 346 has a central axis 390, an (internal) rotation between the rotating part 362 and the stationary part 354 of the rotary feedthrough 346 is in Fig. 8 indicated by a curved double arrow 398. The central axis 390 is offset from the axis of rotation 46 and, in particular, is spaced parallel to it. When the housing 370 (arrow 388) moves, the rotary feedthrough 346 is also moved. Consequently, an axial distance between the central axis 390 and the axis of rotation 46 changes. Nevertheless, direct, tubeless fluid guidance to the housing 370 is possible. The fluid can be used to operate actuators 282 of the locking unit 280. Furthermore, pressure medium, media and/or signals can also be provided via external connections 402 in the housing 370, for example for an attachment 26.

With reference to the Figures 10 and 11 A further embodiment of a coupling device designated overall by 440 is illustrated. The coupling device 440 is particularly similar to that based on Figures 2-6 illustrated coupling device 40 is designed, so that distinguishing features will be discussed below in the first place. With regard to the remaining detailed design of the coupling device 440, reference is made to the Figures 2-6 referred.

The coupling device 440 has, in a manner already described, a mounting interface 460 for mounting on a mobile work machine 10, and a mounting interface 462 is also provided for receiving an attachment 26, see also Fig. 1 . A pivoting section 464 and a rotating section 466 are arranged between the mounting interface 460 and the mounting interface 462; also compare the corresponding sections 64 and 66 in the coupling device 40.

The mounting interface 462 can be rotated relative to the mounting interface 460 about an axis of rotation 446, compare also the rotational movement indicated by 448. The mounting interface 462 can be pivoted relative to the mounting interface 460 about a pivot axis 450, compare also the pivoting movement indicated by 452. For holding and securing attachments 26 ( Fig. 1 ) serves a locking unit 480, which has an actuator 482 (in Fig. 10 covered), see also Fig. 5 with the sectional view there of the locking unit 80 and the actuator 82. The locking unit 480 allows attachments to be accommodated and secured 26 on a first receptacle 484 and a second receptacle 486 of the mounting interface 462.

The pivoting movement 452 is generated by a pivot drive 490, which is assigned to the pivoting section 464 and pivots a pivoting bridge 492 assigned to the mounting interface 462 relative to a mounting support 470 assigned to the mounting interface 460. In the exemplary embodiment, the swivel drive 490 comprises two actuators 496, which are coupled to the swivel bridge 492 via a first coupling point 504 and to the mounting support 470 via a second coupling point 506. The actuators 496 are usually designed as cylinders so that the distance between the two coupling points 504, 506 can be varied. In this way, the pivoting movement 552 can be generated about the pivot axis 450 running through pivot bearings 510.

The Figures 10 and 11 further illustrate a rotary drive 520, which is assigned to the rotary section 466. The rotary drive 520 has a stator 522 and a rotor 524. The stator 522 is firmly connected to the pivot bridge 492 with regard to any rotational movements 448 about the axis of rotation 446. The rotor 524, on the other hand, can be rotated about the pivot axis 446 relative to the pivot bridge 492. The rotor 524 includes, for example, a slewing ring 530 that carries a frame 540. The rotary drive 520 is designed similarly to the rotary drive 120 already illustrated previously. The frame 540 is part of the mounting interface 462.

In a manner already described in principle, the coupling device 440 comprises a rotary feedthrough 546 for hydraulic lines, which in the exemplary embodiment is oriented concentrically to the axis of rotation 446. The rotary feedthrough 546 includes a center 558 and a jacket 564, between which relative rotation is possible. In the exemplary embodiment according to Figures 10 and 11 the jacket 564 can be rotated together with the slewing ring 530, even if the frame 540 with the locking unit 480 accommodated thereon is rotated about the axis of rotation 446. The center 558 of the rotary feedthrough 546 remains in this rotational movement, so that no rotation of the center 558 about the axis of rotation 446 is possible. In this way, channels 166 for fluid guidance can create a fluidic connection between an input the rotary feedthrough 546 (in the Figures 2 10 and 11 not explicitly shown) and the locking unit 480 provide.

The locking unit 480 includes a housing 570, which also serves as a connection block for supplying pressure medium. The housing 570 is fluidly connected to a connecting piece 572, which can be rotated about the axis of rotation 446 together with the jacket 564 of the rotary feedthrough 546. The channels 566 are connected to the housing 570 via fluid paths 576. In this way, on the one hand, a supply of pressure medium to the actuator 482 of the locking unit 480 can be provided. Furthermore, a pressure medium supply can be provided for external pressure medium supply connections 602. It is understood that usually several channels 566 and accordingly several fluid paths 576 are connected to the housing 570 via the rotary feedthrough 546. In Fig. 11 Furthermore, a cover 604 for the pressure medium supply connection 602 is only indicated as an example, which protects and covers it if necessary.

A pipe section 582 is arranged between the connecting piece 572 and the housing 570 and provides a fluid connection between the housing 570 and the connecting piece 572. It should be noted here that it is analogous to what has already been done using the Figures 2-6 illustrated embodiment also in the coupling device 440 according to Figures 10 and 11 a sliding movement 588 of the housing 570 relative to the frame 540 and thus also relative to the connecting piece 572 occurs when the locking unit 480 is actuated via its actuator 482. For example, the sliding movement 588 is oriented perpendicular to the axis of rotation 446.

This sliding movement 588 now ensures a variable distance between the housing 570 and the connecting piece 572. The pipe section 582 bridges this distance and compensates for any fluctuations. In the exemplary embodiment, the pipe section 582 is fixedly arranged in the housing 570 via a seat 590. There, the pipe section 582 opens with one end towards the pressure medium supply connection 602. At an end 592 facing away from the housing 570, the pipe section 582 dips into a recess 578 in the connecting piece 572. In this way, the fluid path 576 can be connected to the pressure medium supply connection 602.

An immersion depth of the pipe section 582 in the recess 578 in the connecting piece 572 depends on a respective distance between the housing 570 and the connecting piece 572. It is understood that the fixed fit of the pipe section 582 in the housing 570 and the displaceable seat of the pipe section 582 in the connecting piece 572 are designed to be as fluid-tight as possible by suitable seals and designs.

Fig. 11 further illustrates a coaxial arrangement of the pipe section 582 with respect to the pressure medium supply connection 602. In the exemplary embodiment, the coaxial arrangement also includes the recess 578 in the connecting piece 572. A longitudinal axis 594 extends between the recess 578, the pipe section 582 and the pressure medium supply connection 602. In this way In particular, the housing 570 of the locking unit 480 can be designed to be particularly compact. Ideally, deflections in the fluid path 576 can be avoided.

Claims (15)

Coupling device (40, 240, 440) for connecting an attachment (26) to a mobile work machine (10), the coupling device (40, 240, 440) having the following: - a mounting interface (60, 460) for mounting on a boom (22) of a mobile work machine (10), - an attachment interface (62, 462) for releasably receiving an attachment (26), which has a locking unit (80, 280, 480) for the attachment (26) that can be actuated by at least one fluidic actuator (82, 282, 482), and - A rotating section (66, 466) arranged between the mounting interface (60, 460) and the mounting interface (62, 462) with a rotary drive (120) for generating a relative rotation between the mounting interface (60, 460) and the mounting interface (62, 462 ) about an axis of rotation (46, 446), wherein the locking unit (80, 280, 480) has a housing (170, 370, 570) with at least one pressure medium supply connection (180, 380, 202, 402, 602), which is displaceably attached to a frame (140, 340, 540) of the mounting interface (62, 462) is arranged, wherein the rotating section (66, 466) has a stator (122, 522) and a rotor (124, 524) which can be rotated relative to the stator (122, 522) about the axis of rotation (46, 446), and wherein the locking unit (80, 280, 480) can be rotated by the rotor (124, 524), characterized in that a rotary feedthrough (146, 346, 546) is arranged in the rotating section (66, 466), which is connected to the pressure medium supply connection (180, 380, 202, 402, 602) of the housing (170, 370, 570) in a tubeless manner for supplying pressure medium. is coupled. A coupling device (40, 240, 440) according to claim 1, wherein the rotor (124, 524) comprises a slewing ring (130) through which the rotary feedthrough (146, 346, 546) extends. Coupling device (40, 240, 440) according to claim 1 or 2, wherein the rotary feedthrough (146, 346, 546) is oriented concentrically to the rotary section (66, 466). Coupling device (40, 240, 440) according to one of claims 1-3, wherein the actuator (82, 282, 482) has a piston (220) which can be moved relative to the housing (170, 370, 570) and which is located in the housing (170, 370, 570), in which a cylinder space (222) is formed for the piston (220), the mounting interface (62, 462) having a first receptacle (84, 484) and a second receptacle (86, 486), which face away from each other, the housing (170, 370, 570) being coupled to a first locking element (214) in the first receptacle (84, 484) and to a second locking element (216) in the second receptacle (86, 486). , and in particular the housing (170, 370, 570) and the piston (220) can be moved between a retracted state and an extended state in order to actuate the first locking element (214) and the second locking element (216). Coupling device (40, 240, 440) according to one of claims 1-4, wherein between the rotary feedthrough (146, 346, 546) and the housing (170, 370, 570) of the locking unit (80, 280, 480) there is at least one fluid-conducting pipe section (182, 582) is arranged to compensate for movements of the housing (170, 370, 570) relative to the frame (140, 340, 540) of the mounting interface (62, 462). Coupling device (40, 240, 440) according to claim 5, wherein the housing (170, 370, 570) and the pipe section (182, 582) are displaceable relative to one another, and wherein the pipe section (182, 582) is attached to the housing (170, 370 , 570) of the locking unit (80, 280, 480) or a connecting piece (172, 572) assigned to the rotary feedthrough (146, 346, 546). Coupling device (40, 240, 440) according to claim 5 or 6, wherein the pipe section (182, 582) is at least partially inserted into a recess in the housing (170, 370, 570) of the locking unit (80, 280, 480) and / or into a Recess (572) of the connecting piece (172, 572) of the rotary union (146, 346, 546) is immersed, and an immersion depth of the pipe section (182, 582) in the recess is variable depending on a position of the housing (170, 370, 570) of the locking unit (80, 280, 480) in relation to the frame (140, 340, 540) of the mounting interface (62, 462). Coupling device (40, 240, 440) according to one of claims 5-7, wherein the pipe section (182, 582) is attached to the frame (140) at its end facing away from the housing (170, 370, 570) of the locking unit (80, 280, 480). , 340, 540) of the mounting interface (62, 462), and wherein the pipe section (182, 582) has a longitudinal extension that is parallel to the sliding movement (188) of the housing (170, 370, 570) of the locking unit (80, 280 , 480) is oriented. Coupling device (40, 240, 440) according to one of claims 5-8, wherein the pipe section (182, 582) is coaxial with a pressure medium supply connection (180, 380, 202, 402, 602) on the housing (170, 570) of the locking unit (80 , 280, 480) is oriented, so that the pressure medium supply connection (180, 380, 202, 402, 602), the pipe section (182, 582) and a recess (578) assigned to the rotary feedthrough (146, 346, 546) for receiving the Pipe piece (182, 582) are arranged in a fluid-conducting manner along a common longitudinal axis (594). Coupling device (40, 240, 440) according to one of claims 5-9, wherein a plurality of pipe pieces (182, 582) between the rotary feedthrough (146, 346, 546) and the housing (170, 370, 570) of the locking unit (80 , 280, 480), the pipe pieces (182, 582) each being fluidically assigned to a channel (166, 566) of the rotary feedthrough (146, 346, 546), the housing (170, 370, 570) being connected to the locking unit ( 80, 280, 480) has at least one pressure medium supply connection (180, 380, 202, 402, 602) fluidly coupled to one of the channels (166, 566) for supplying fluid to the actuator (82, 282, 482), and wherein the housing (170 , 370, 570) of the locking unit (80, 280, 480) has at least one pressure medium supply connection (202, 402, 602) fluidly coupled to one of the channels (166, 566) for external fluid supply. Coupling device (40, 240, 440) according to one of claims 1-10, wherein the rotary feedthrough (146, 346, 546) has a central axis (354) oriented parallel to the axis of rotation (46, 446), and wherein an axial distance between the axis of rotation ( 46, 446) and the central axis (354) of the rotary feedthrough (146, 346, 546) depending on an operating state of the locking unit (80, 280, 480), in particular depending on a position of the housing (170, 370, 570) , is changeable. Coupling device (40, 240, 440) according to one of claims 1-11, wherein the rotary feedthrough (146, 346, 546) is designed as a multi-channel rotary feedthrough, with at least one channel (166, 566) of the rotary feedthrough (146, 346, 546) serves to supply pressure medium to the locking unit (80, 280, 480) of the attachment interface (62, 462), and wherein at least one channel (166, 566) serves to supply pressure medium to a degree of freedom of the attachment (26). Coupling device (40, 240, 440) according to one of claims 1-12, further comprising a between the mounting interface (60, 460) and the mounting interface (62, 462), in particular between the mounting interface (60, 460) and the rotating section (66 , 466), arranged pivoting section (64, 464) with a pivoting drive (90, 490) for generating a pivoting movement (52, 452) between the mounting interface (60, 460) and the mounting interface (62, 462) about a pivoting axis (50, 450). Coupling device (40, 240, 440) according to claim 13, wherein the pivoting section (64, 464) comprises a pivot axis (50, 450) inclined relative to the axis of rotation (46, 446), in particular a pivot axis oriented perpendicular to the axis of rotation (46, 446). (50, 450), wherein the rotating section (66, 466) is coupled to the pivot axis (50, 450) via a pivoting arm (100, 500) and can be pivoted about the pivot axis (50, 450), the pivot drive (90, 490) extends between a coupling point (106, 506) at the assembly interface (60, 460) and a coupling point (104, 504) at the pivoting boom (100, 500), both coupling points (104, 106, 504, 506) extending from the pivot axis (50, 450) and are offset from each other, and the pivot axis (50, 450) is arranged at least in a neutral position of the swivel drive (90, 490) between the mounting interface (60, 460) and the coupling point (104, 504) on the swivel boom (100, 500). Mobile work machine (10) with a chassis (12), a structure (14) carried by the chassis (12), and at least one articulated boom (22), which has a coupling device (40, 240, 440) according to one of claims 1- 14 carries for coupling an attachment (26).

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