CN114467467B

CN114467467B - Wheel type pushing tool

Info

Publication number: CN114467467B
Application number: CN202011155054.7A
Authority: CN
Inventors: 闫明星; 白兵
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2025-08-15
Anticipated expiration: 2040-10-26
Also published as: CN114467467A; WO2022089424A1

Abstract

The present invention relates to a wheeled pushing tool. During normal use, the push rod assembly is rotated so that the push rod assembly forms a preset angle on the main body; after the rotation, the first push rod and the second push rod are stretched so that the push rod assembly as a whole is extended; finally, the first push rod and the second push rod, as well as the first push rod and the main body are locked respectively through the first locking part and the second locking part, so that the push rod assembly is in a locked state on the main body. When the push rod assembly needs to be retracted and folded, at least one unlocking button is activated to drive the unlocking part on the transmission assembly to activate, triggering the first locking part and the second locking part to unlock respectively, thereby ensuring that the push rod assembly can be stably retracted and folded on the main body. This wheeled pushing tool integrates the unlocking trigger part for retraction and folding on the shell. The user does not need to bend over to touch the folding switch on the side of the main body. The push rod assembly can be retracted and rotated and folded by operating the unlocking button with one button.

Description

Wheel type pushing tool

Technical Field

The invention relates to the technical field of push rods, in particular to a wheel type pushing tool.

Background

The wheel type pushing tool is usually provided with a push rod so as to be convenient for a user to walk, and push-pull equipment, such as a grass pusher, a hand-push type seeder, a hand-push type sweeper, a hand-push type suitcase and the like. The traditional wheel type pushing tool is convenient to store, and the push rod is often designed to be in a retractable and folding structure. In the shrinkage and folding process of the traditional push rod, the trigger switch needs to be triggered at different positions, particularly in the folding process, a user is required to bend down to trigger the switch, so that the shrinkage and folding process of the push rod are extremely inconvenient, and the using function of a product is seriously affected.

Disclosure of Invention

Based on this, it is necessary to provide a wheeled pushing tool, makes things convenient for the push rod to shrink and fold, improves wheeled pushing tool's convenience of use, promotes the user experience sense of product.

The wheel type pushing tool comprises a main body, a push rod assembly and an unlocking mechanism, wherein the main body is provided with wheels used for supporting the main body on a working surface, the push rod assembly comprises a first push rod and a second push rod which is connected to the first push rod in a telescopic mode, the first push rod rotates between a first position and a second position relative to the main body, an included angle is formed between the first push rod and the working surface, the included angle of the first push rod in the first position is larger than the included angle of the first push rod in the second position, the second push rod can be close to or far away from the main body along the axial direction of the first push rod, the unlocking mechanism comprises a shell, a transmission assembly and an unlocking button, the transmission assembly at least comprises a first locking part, a second locking part and an unlocking part, the first locking part is used for locking the first push rod and the second push rod, the second locking part is used for locking the main body, the included angle of the first push rod in the first position is larger than the included angle of the first push rod in the second position, the second push rod can be matched with the first push rod in the unlocking part, and the unlocking part is triggered by the first push rod and the unlocking part in the telescopic mode, and the unlocking part is triggered by the first push rod is in the unlocking part, and the unlocking part is in the state of the first push button is triggered.

The wheel type pushing tool is characterized in that the first pushing rod and the second pushing rod are respectively connected with the main body through a first locking part and a second locking part, and the first pushing rod and the main body are respectively connected with the main body through a first locking part and a second locking part. When the push rod assembly is required to be contracted and folded, at least one unlocking button is moved to drive the unlocking part on the transmission assembly to act, the first locking part and the second locking part are triggered, the telescopic and rotary functions of the push rod assembly are unlocked respectively, and the push rod assembly is ensured to be stably contracted and folded on the main body. Therefore, the wheel type pushing tool integrates the shrinkage and folding unlocking triggering parts on the shell, and in the operation process, a user does not need to bend a folding switch on one side of the touch main body, and the push rod assembly can stretch and rotate and fold only by operating the unlocking button through one key. Therefore, the folding and shrinking operation of the push rod is greatly facilitated, the use convenience of the wheel type pushing tool is effectively improved, and the user experience of a product is greatly improved.

In one embodiment, the main body is provided with a motor, the wheeled pushing tool further comprises a safety component arranged in the shell, the safety component is electrically connected with the motor, the safety component is in transmission fit with the unlocking button and can be in a connection or disconnection state relative to the movement of the unlocking button, when the first locking part and/or the second locking part are in an unlocking state, the safety component can enable the motor to be in a start-disabled state, and when the first locking part and/or the second locking part are in a locking state, the safety component can enable the motor to be in a start-enabled state.

In one embodiment, the transmission assembly comprises a first transmission assembly and a second transmission assembly, the first transmission assembly comprises a first transmission part, a second transmission part and a first positioning part which are in transmission fit in sequence, the first transmission part is in transmission fit with the unlocking button, a first positioning hole for the first positioning part to penetrate is formed in the push rod assembly, the second transmission assembly comprises a second positioning part, a third transmission part, a fourth transmission part and a pull rope connected between the third transmission part and the fourth transmission part, the third transmission part is in transmission fit with the unlocking button, the fourth transmission part is in transmission fit with the second positioning part, a second positioning hole for the second positioning part to penetrate is formed in the main body, the first locking part is close to one end of the push rod assembly, the second locking part is close to one end of the main body, and the unlocking parts are respectively close to one end of the first transmission part and one end of the third transmission part.

In one embodiment, the first transmission member and the second transmission member are both rotatably connected in the housing, one end of the second transmission member is connected with the first positioning member, the other end of the second transmission member abuts against the first transmission member, and the unlocking button can drive the first transmission member to rotate and drive the second transmission member to rotate when moving.

In one embodiment, the first transmission member is provided with a first engaging portion, and the second transmission member is provided with a second engaging portion engaged with the first engaging portion.

In one embodiment, the housing is located between the first push rod and the second push rod along the axial direction of the first push rod, a supporting plate is arranged in the housing, and the first transmission assembly and the second transmission assembly are respectively located on two opposite sides of the supporting plate.

In one embodiment, the unlocking button is provided with at least two abutting portions, the at least two abutting portions are in transmission fit with the first transmission assembly and the second transmission assembly respectively, or the unlocking button is provided with at least two abutting portions, each unlocking button is provided with an abutting portion, and the abutting portions on the two unlocking buttons are in transmission fit with the first transmission assembly and the second transmission assembly respectively.

In one embodiment, the unlocking mechanism further comprises a first reset piece, wherein the first reset piece is arranged in the shell and is used for resetting the first positioning piece into the first positioning hole.

In one embodiment, the unlocking mechanism further comprises a second reset piece, wherein the second reset piece is used for resetting the second positioning piece into the second positioning hole.

In one embodiment, the first push rod is provided with a mounting shell near one end of the main body, the third transmission piece is rotatably connected in the housing, the fourth transmission piece is rotatably connected in the mounting shell, the unlocking button is pressed at one end of the third transmission piece, the other end of the third transmission piece is connected with one end of the fourth transmission piece through the pull rope, and the other end of the fourth transmission piece is in transmission connection with the second positioning piece.

In one embodiment, the number of the push rod assemblies is two, the two push rod assemblies are located on two opposite sides of the main body, the shell is connected between the two push rod assemblies, and the two transmission assemblies are respectively corresponding to the telescopic and rotary actions of the push rod assemblies on two sides of the main body.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a wheel type implement according to one embodiment;

FIG. 2 is a schematic illustration of a push rod assembly according to one embodiment;

FIG. 3 is a schematic view illustrating the engaging structure of the unlocking button and the first transmission assembly according to one embodiment;

FIG. 4 is a schematic view illustrating the engagement of the unlocking knob with the second transmission assembly according to one embodiment;

FIG. 5 is a schematic view of a wheel type pushing tool according to another embodiment;

FIG. 6 is a schematic illustration of a push rod assembly according to another embodiment;

FIG. 7 is a schematic view illustrating the engaging structure of the unlocking button and the first transmission assembly according to another embodiment;

FIG. 8 is a schematic view illustrating the engagement of the unlocking button with the second transmission assembly according to another embodiment;

Fig. 9 is a schematic diagram of a security assembly within a control panel according to one embodiment.

100. The unlocking mechanism comprises 110, a shell, 111, a first shell, 112, a first perforation, 113, a first guide groove, 114, a mounting groove, 120, a mounting shell, 121, a second shell, 122, a second perforation, 123, a second guide groove, 130, a transmission assembly, 131, a first transmission assembly, 1311, a first transmission member, 13111, a first clamping part, 1312, a second transmission member, 13121, a second clamping part, 13122, a first waist-shaped groove, 1313, a first positioning member, 13131, a first protrusion, 132, a second transmission assembly, 1321, a third transmission member, 1322, a fourth transmission member, 13221, a second waist-shaped groove, 1323, a second positioning member, 13231, a second protrusion, 133, a first locking part, 134, a second locking part, 135, an unlocking part, 140, an unlocking button, 141, a collision part, 150, a first resetting member, 160, a resetting spring, 170, a supporting plate, 180, a rope guide tube, 190, a safety assembly, a Hall plate, 191, 192, a third transmission member, 1322, a first protrusion, 133, a second protrusion, 133, a first push rod, a first positioning hole, 320, a push rod, a main body, a second positioning hole, a main body, a push rod, a first positioning hole, a third positioning hole, a main body, and a push rod.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 4, a wheeled pushing tool, in this embodiment, a hand propelled mower is taken as an example, and includes a main body 300, a push rod assembly 200 and an unlocking mechanism 100. The main body 300 is provided with wheels 320 for supporting the main body 300 on a work surface. The push rod assembly 200 includes a first push rod 210 and a second push rod 220 telescopically coupled to the first push rod 210. The first push rod 210 rotates relative to the main body 300 between a first position and a second position, and an included angle is formed between the first push rod 210 and the working surface, and the included angle of the first push rod 210 in the first position is larger than the included angle of the first push rod in the second position. The second push rod 220 is drawn toward or away from the main body 300 along the axial direction of the first push rod 210. The unlocking mechanism 100 includes a housing 110, a transmission assembly 130, and an unlocking knob 140. The transmission assembly 130 is at least partially disposed in the housing 110, and the transmission assembly 130 includes at least a first locking portion 133, a second locking portion 134, and an unlocking portion 135. The first locking portion 133 is used for locking the first push rod 210 and the second push rod 220. The second locking portion 134 is used for locking the main body 300 and the first push rod 210. The unlocking portion 135 is in driving engagement with the unlocking knob 140. The unlocking knob 140 is movably mounted on the housing 110. When at least one unlocking button 140 is activated, the unlocking button 140 triggers the unlocking part 135, and the unlocking part 135 drives the first locking part 133 and the second locking part 134 to unlock respectively, so as to change the telescopic state of the push rod assembly 200 and the position state relative to the main body.

In the above-mentioned wheel type pushing tool, during normal use, the push rod assembly 200 is rotated to form a preset angle on the main body 300, after rotation, the first push rod 210 and the second push rod 220 are stretched to integrally extend the push rod assembly 200, and finally, the first push rod 210 and the second push rod 220, and the first push rod 210 and the main body 300 are locked by the first locking portion 133 and the second locking portion 134, respectively, so that the push rod assembly 200 is in a locked state on the main body 300 for being pushed by a user's hand. When the push rod assembly 200 needs to be retracted and folded, at least one unlocking button 140 is moved to drive the unlocking part 135 on the transmission assembly 130 to act, so as to trigger the first locking part 133 and the second locking part 134 to unlock the retraction and rotation functions of the push rod assembly 200 respectively, thereby ensuring that the push rod assembly 200 can be stably retracted and folded on the main body 300. Therefore, the present wheel type pushing tool integrates the unlock triggering portion of contraction and folding on the housing 110, and the housing 110 is disposed between the first push rod 210 and the second push rod 220 along the axial direction of the first push rod 210, and in the operation process, the user does not need to bend the folding switch on one side of the touch main body 300, and can realize the functions of stretching and rotating the push rod assembly 200 by only operating the unlock button 140 with one key. Therefore, the folding and shrinking operation of the push rod is greatly facilitated, the use convenience of the wheel type pushing tool is effectively improved, and the user experience of a product is greatly improved. Meanwhile, the push rod assembly 200 is telescopic, rotationally folded and stored on the main body 300, so that the size of the whole machine can be greatly reduced, and the storage or transportation space of the whole machine is reduced.

It should be noted that the implementation structure of the transmission assembly 130 in this embodiment is various, which is not limited in particular, and only the transmission assembly 130 needs to have at least three locking portions, namely, a locking portion for locking the main body 300 and the first push rod 210, a locking portion for locking the first push rod 210 and the second push rod 220, and a locking portion for driving and cooperating with the unlocking knob 140. For example, the structure of the transmission assembly 130 may be a gear set structure, a teeter-totter structure, a linkage mechanism, or the like. Meanwhile, the second push rod 220 may be telescopically connected to the first push rod 210 in such a manner that the first push rod 210 is sleeved in the second push rod 220, or the first push rod 210 may be sleeved outside the second push rod 220.

It should be noted that when at least one unlocking button 140 is activated, the first locking portion 133 and the second locking portion 134 can be driven to unlock, which is understood as that when one unlocking button 140 is activated, the first locking portion 133 and the second locking portion 134 can be driven to unlock simultaneously, please refer to fig. 3 and 4, and when more than two unlocking buttons 140 are activated, the first locking portion 133 and the second locking portion 134 can be driven to unlock simultaneously. When there are more than two unlocking buttons 140, the two unlocking buttons 140 respectively drive the first locking portion 133 and the second locking portion 134 to unlock, please refer to fig. 7 and 8. Further, there are various ways of moving the unlocking knob 140, such as pressing up and down in the housing 110, sliding left and right or back and forth on the surface of the housing 110, rotating about its own axis (i.e., 360 ° rotation) on the housing 110, or rotating about a fulcrum on the housing 110.

In addition, the transmission matching of the embodiment comprises transmission connection and transmission interference, namely, the transmission connection is that two structures are mutually transmitted through a pin shaft, a bolt or a screw and the like, the transmission interference is that the two structures are not connected, and the mutual transmission of the actions between the two structures is realized through the contact between the surfaces. In addition, the work surface is understood to be the surface of the wheeled implement that contacts the wheels when in use, and the type of work surface is not particularly limited in this embodiment.

Optionally, the wheeled pushing tool is a grass pusher, a hand propelled planter, a hand propelled sweeper, a hand propelled luggage, or the like. In addition, the first push rod 210 may be hinged or pin-connected to the main body 300.

Further, referring to fig. 1, 5 and 9, a motor is disposed on the main body 300. The wheeled pusher also includes a safety assembly 190 mounted within the housing 110. The safety assembly 190 is electrically connected to the motor. The safety assembly 190 is in driving engagement with the unlocking knob 140 and can be in a connected or disconnected state with respect to the movement of the unlocking knob 140, and the safety assembly 190 can place the motor in a disabled state when the first locking portion 133 and/or the second locking portion 134 are in an unlocked state. Thus, when the unlocking button 140 is active, not only the first locking portion 133 and the second locking portion 134 are touched to perform unlocking operation respectively, but also the safety assembly 190 is in a connected or disconnected state to control the motor circuit to be connected or disconnected, so that the main body 300 is ensured to be unable to be started in the unlocking state of the push rod assembly 200, and the operation safety of the wheel type pushing tool is effectively improved.

In addition, the safety assembly 190 enables the motor to be in an enabling state when the first locking portion 133 and/or the second locking portion 134 are both in a locked state. When the unlocking button 140 is active, only one of the locking parts is needed to be locked, the motor is in a starting state, and the wheel type pushing tool can be started timely and quickly.

It should be noted that the present embodiment is not limited to the circuit control logic relationship between the safety assembly 190 and the motor, for example, the safety assembly 190 may be in an off state to prohibit the motor from being started, or may be allowed to start. Or when the safety assembly 190 is in the connected state, motor activation may be allowed or may be disabled. When the safety assembly 190 is in the connected state, the motor is prohibited from being started, that is, when the first locking portion 133 and the second locking portion 134 are in the unlocked state, the safety assembly 190 is in the connected state, and after the electric signal is fed back to the controller, the controller controls the motor to be in the prohibited starting state.

It should be noted that, when the first locking portion 133 and/or the second locking portion 134 are in the unlocked state, when the first locking portion 133 and/or the second locking portion 134 are in the locked state, it should be understood that when the first locking portion 133 and/or the second locking portion 134 are in the unlocked state, or when the first locking portion 133 and/or the second locking portion 134 are in the locked state, the two condition states are not simultaneously present, but are correspondingly described based on the unlocked or locked two states of the unlocking mechanism 100, respectively.

Alternatively, the security component 190 may be a contact switch or a position sensor, or the like. Meanwhile, the wheel type pushing tool further comprises a controller arranged in the main body 300, wherein the controller can be a singlechip or a programmable logic controller.

Still further, referring to fig. 9, the safety assembly 190 includes a hall plate 191 and a magnet 192 disposed opposite to each other, wherein one of the hall plate 191 and the magnet 192 is disposed in the housing 110, and the other is disposed on the transmission assembly 130. When the unlocking button 140 is moved, the hall plate 191 and the magnet 192 are staggered, for example, when the unlocking button 140 is pressed down, the magnet 192 is far away from the hall plate 191 and staggered, the magnetic field on the hall plate 191 is weakened, the potential difference between the sheets at two ends of the hall plate 191 is reduced, and the safety assembly 190 is in a disconnected state.

Specifically, referring to fig. 9, the hall plate 191 is mounted on the support plate 170, and the magnet 192 is mounted on the first transmission member 1311 or the third transmission member 1321. When the safety assembly 190 is two sets, two hall plates 191 are respectively mounted on opposite sides of the support plate 170, and two magnets 192 are respectively mounted on the first transmission member 1311 and the third transmission member 1321.

In one embodiment, referring to fig. 2, 3 and 7, the transmission assembly 130 is divided into a first transmission assembly 131 and a second transmission assembly 132. The first transmission assembly 131 includes a first transmission member 1311, a second transmission member 1312, and a first positioning member 1313 in driving engagement in sequence. The first driver 1311 is in driving engagement with the release button 140. The push rod assembly 200 is provided with a first positioning hole 221 through which the first positioning member 1313 penetrates. The second transmission assembly 132 includes a second positioning member 1323, a third transmission member 1321, a fourth transmission member 1322, and a pull cord connected between the third transmission member 1321 and the fourth transmission member 1322. The third transmission member 1321 is in driving engagement with the unlocking knob 140. The fourth driving member 1322 is in driving engagement with the second positioning member 1323. The main body 300 is provided with a second positioning hole 310 through which the second positioning member 1323 passes. The first locking portion 133 is an end of the first positioning member 1313 near the push rod assembly 200. The second locking portion 134 is an end of the second positioning member 1323 near the main body 300. The unlocking portion 135 is an end of each of the first transmission member 1311 and the third transmission member 1321, which is close to the unlocking button 140.

It can be seen that the present embodiment classifies the transmission assembly 130 such that the telescoping and rotating functions of the push rod assembly 200 are accomplished by the first transmission assembly 131 and the second transmission assembly 132, respectively. When the unlocking button 140 is moved, the first transmission member 1311 and the second transmission member 1312 sequentially move to drive the first positioning member 1313 to move in the housing 110, so that the first positioning member 1313 is stably separated from the first positioning hole 221, and the locking on the push rod assembly 200 is released, so that the push rod assembly 200 can be contracted. Meanwhile, the third transmission member 1321 is driven by the unlocking button 140 to act, and the pull rope is pulled to drive the fourth transmission member 1322 to act, so that the second positioning member 1323 is pulled out of the second positioning hole 310, and the push rod assembly 200 is unlocked on the main body 300, so that the push rod assembly 200 is folded on the main body 300. The first positioning hole 221 and the second positioning hole 310 are not limited to the hole-shaped structure, and may be provided as a positioning groove or the like.

It should be noted that in the transmission process, the first transmission member 1311 and the second transmission member 1312 have various structures, for example, the first transmission member 1311 and the second transmission member 1312 are gears, one of the gears is meshed with the unlocking button 140, that is, a rack or a bevel gear is provided on the unlocking button 140, and the other gear is meshed with the first positioning member 1313, that is, a rack is also provided on the first positioning member 1313. When the unlocking button 140 is pressed up and down or rotates around the axis thereof, the first positioning piece 1313 moves in the housing 110 through gear matching, or the first transmission piece 1311 and the second transmission piece 1312 are respectively a crank and a connecting rod, the unlocking button 140 is connected to the axis of the crank, two ends of the connecting rod are respectively connected to the crank and the first positioning piece 1313, and the first positioning piece 1313 is driven to move back and forth by rotating the unlocking button 140 by utilizing the principle of a crank slider.

Meanwhile, the third transmission member 1321 and the fourth transmission member 1322 may have a teeter-totter structure, or the third transmission member 1321 and the fourth transmission member 1322 may have a gear structure. When the third transmission member 1321 and the fourth transmission member 1322 are in a gear structure, the pull rope is wound on the third transmission member 1321 and the fourth transmission member 1322, and the third transmission member 1321 and the fourth transmission member 1322 rotate through the pull rope, and at this time, the fourth transmission member 1322 and the second positioning member 1323 are matched with the rack through the gear.

Further, referring to fig. 3 and fig. 7, the first transmission member 1311 and the second transmission member 1312 are rotatably connected in the housing 110, one end of the second transmission member 1312 is connected to the first positioning member 1313, the other end of the second transmission member 1312 abuts against the first transmission member 1311, and the unlocking button 140 can drive the first transmission member 1311 to rotate and drive the second transmission member 1312 to rotate when moving. Therefore, in the present embodiment, the first transmission member 1311 and the second transmission member 1312 are both in a teeterboard structure, i.e. the unlocking button 140 is pressed down by the teeterboard principle, one end of the first transmission member 1311 is lowered, the other end of the first transmission member 1311 is lifted, and the second transmission member 1312 is driven to swing in the housing 110 after the first transmission member 1311 is lifted, so that the first positioning member 1313 moves back under the action of the second transmission member 1312 and is pulled out of the first positioning hole 221.

Specifically, referring to fig. 3 and 7, a first waist-shaped slot 13122 is formed on the second transmission member 1312, a first protrusion 13131 is formed on the first positioning member 1313, and the first protrusion 13131 penetrates into the first waist-shaped slot 13122 to complete connection between the second transmission member 1312 and the first positioning member 1313, and when the second transmission member 1312 swings, the slot wall of the first waist-shaped slot 13122 applies a force to the first protrusion 13131 and dials back to the first positioning member 1313. Meanwhile, in the swinging process of the second transmission piece 1312, the distance between the second transmission piece 1312 and the first positioning piece 1313 will change accordingly, so that the first waist-shaped groove 13122 is matched with the first protrusion 13131 to adaptively adjust the distance between the second transmission piece 1312 and the first positioning piece 1313, so that rigid interference between the second transmission piece 1312 and the first positioning piece 1313 and incapability of pulling back the first positioning piece 1313 are avoided.

Of course, in other embodiments, the second transmission member 1312 may be configured not to be connected to the first positioning member 1313, but to keep the abutting state, that is, one end of the second transmission member 1312 is located at the front end of the first protrusion 13131 on the first positioning member 1313, and when the second transmission member 1312 swings back, it abuts against the first protrusion 13131 to drive the first positioning member 1313 to retract.

In one embodiment, referring to fig. 3, a first engaging portion 13111 is disposed on the first transmission member 1311. The second transmission member 1312 is provided with a second engagement portion 13121 engaged with the first engagement portion 13111. Therefore, the stability of the engagement between the first transmission member 1311 and the second transmission member 1312 is improved by the first engagement portion 13111 and the second engagement portion 13121, so as to prevent the first transmission member 1311 and the second transmission member 1312 from falling off during the transmission process, thereby reducing the stability of the unlocking mechanism 100.

Alternatively, the first engaging portion 13111 may be a concave portion, the first engaging portion 13111 may be a convex portion, or the first engaging portion 13111 may be a convex portion, and the second engaging portion 13121 may be a concave portion.

In one embodiment, referring to fig. 3 and 4, the housing 110 is located between the first push rod 210 and the second push rod 220 along the axial direction of the first push rod 210, the housing 110 is provided with a support plate 170, and the first transmission assembly 131 and the second transmission assembly 132 are respectively located at two opposite sides of the support plate 170, so that the first transmission assembly 131 and the second transmission assembly 132 are separated, so that the contraction and folding processes respectively run, and are not interfered with each other, thereby making the unlocking function of the wheeled pushing tool more stable

Specifically, referring to fig. 3 and 4, the first transmission member 1311 and the third transmission member 1321 are rotatably installed on opposite sides of the support plate 170, respectively.

Further, referring to fig. 3 and 4, at least two abutting portions 141 are disposed on the unlocking button 140. The at least two abutting portions 141 are respectively in driving fit with the first driving component 131 and the second driving component 132. Or at least two unlocking buttons 140 are arranged, each unlocking button 140 is provided with an abutting part 141, and the abutting parts 141 on the two unlocking buttons 140 are respectively in transmission fit with the first transmission component 131 and the second transmission component 132. It can be seen that the telescoping and rotating functions of the push rod assembly 200 can be controlled by one unlocking knob 140, or more than two unlocking knobs 140 can be controlled individually.

In one embodiment, referring to fig. 7, the unlocking mechanism 100 further includes a first reset member 150, where the first reset member 150 is installed in the housing 110, and the first reset member 150 is used to reset the first positioning member 1313 into the first positioning hole 221. When the first positioning piece 1313 is pulled out of the first positioning hole 221, the unlocking button 140 is released, and under the action of the first resetting piece 150, the first positioning piece 1313 is reset into the first positioning hole 221 again, so that the push rod assembly 200 is locked again, and the push rod assembly 200 is prevented from being optionally contracted in folding.

It should be noted that, the specific position of the first reset element 150 in the housing 110 is not limited in this embodiment, and the first positioning element 1313 can be restored to the previous state only when the unlocking button 140 is released. For example, the first reset member 150 is connected to the unlocking knob 140 to apply a reset force to the unlocking knob 140, or the first reset member 150 is connected to the first transmission assembly 131 to apply a reset force to the first transmission assembly 131, or the first reset member 150 is directly connected to the first positioning member 1313.

Alternatively, the first restoring member 150 may be a spring, elastic rubber, elastic metal sheet, torsion spring, or the like.

Specifically, referring to fig. 7, the first restoring member 150 is a restoring spring 160. One end of the return spring 160 is sleeved on the first positioning piece 1313, and the other end of the return spring 160 is connected in the shell 110. When the unlocking knob 140 is moved, the first positioning piece 1313 is pulled out of the first positioning hole 221, and at this time, the return spring 160 is compressed, and when the unlocking knob 140 is released, the first positioning piece 1313 is pushed out and reinserted into the first positioning hole 221 by the return force of the return spring 160.

In one embodiment, the unlocking mechanism 100 further includes a second reset member for resetting the second positioning member 1323 into the second positioning hole 310. When the second positioning member 1323 is pulled out of the second positioning hole 310, the unlocking button 140 is released, and under the action of the second resetting member, the second positioning member 1323 is reset into the second positioning hole 310 again, and the push rod assembly 200 is locked again, so that the push rod assembly 200 is prevented from being folded on the main body 300 at will.

Specifically, the second restoring member is a spring, and the spring is located in the mounting housing 120 and sleeved on the second positioning member 1323.

In one embodiment, referring to fig. 7, a mounting groove 114 is formed in the housing 110, one end of the return spring 160 is sleeved on the first positioning member 1313, and the other end of the return spring 160 abuts against a groove wall of the mounting groove 114.

In one embodiment, referring to fig. 3 and 7, a first through hole 112 is formed on the housing 110. The housing 110 is provided therein with a first guide groove 113 communicating with the first through hole 112. The first perforation 112 is used to penetrate the push rod assembly 200. The first guide groove 113 is used to receive the first positioning member 1313. It can be seen that, during the assembly process, the housing 110 is sleeved on the push rod assembly 200 through the first through hole 112, so that the first guide groove 113 is opposite to the first positioning hole 221 on the push rod assembly 200, and the first positioning piece 1313 can be inserted into or pulled out of the first positioning hole 221 when moving in the first guide groove 113. Meanwhile, a first guide groove 113 is provided in the housing 110 to ensure smooth movement of the first positioning member 1313.

In one embodiment, referring to fig. 1, 2, 5 and 6, the first push rod 210 has a mounting shell 120 near an end of the main body 300. A third transmission 1321 is rotatably coupled within the housing 110. The fourth driving member 1322 is rotatably coupled to the mounting case 120, and the unlocking knob 140 is pressed against one end of the third driving member 1321. The other end of the third transmission member 1321 is connected to one end of the fourth transmission member 1322 through a pull rope. The other end of the fourth driving member 1322 is in driving connection with the second positioning member 1323. Therefore, the third transmission member 1321 and the fourth transmission member 1322 are respectively in a teeterboard structure, when the unlocking button 140 is pressed down, one end of the third transmission member 1321 is lowered to raise the other end of the third transmission member 1321, and then, under the action of the pull rope, one end of the fourth transmission member 1322 is raised to swing the other end of the fourth transmission member 1322, so as to drive the second positioning member 1323 to move.

Further, referring to fig. 4 and 8, the fourth transmission member 1322 is provided with a second waist-shaped slot 13221, the second positioning member 1323 is provided with a second protrusion 13231, and the second protrusion 13231 penetrates into the second waist-shaped slot 13221 to complete the connection between the fourth transmission member 1322 and the second positioning member 1323, and when the fourth transmission member 1322 swings, the slot wall of the second waist-shaped slot 13221 applies a force to the second protrusion 13231 to pull back the second positioning member 1323. Meanwhile, in the swinging process of the fourth transmission member 1322, the distance between the fourth transmission member 1322 and the second positioning member 1323 will change accordingly, so that the second waist-shaped slot 13221 is matched with the second protrusion 13231 to adaptively adjust the distance between the fourth transmission member 1322 and the second positioning member 1323, so that rigid interference between the fourth transmission member 1322 and the second positioning member 1323 is avoided, and the second positioning member 1323 cannot be pulled back.

Specifically, referring to fig. 4 and 8, the pivot point of the third transmission member 1321 on the housing 110 is relatively close to the end of the third transmission member 1321 close to the unlocking button 140, so that the swing arc of the end of the third transmission member 1321 close to the pull cord is larger, and the second positioning member 1323 is ensured to be pulled out of the second positioning hole 310. Meanwhile, the fourth driving member 1322 has a structure of "L" or approximately "L", and also, ensures that the second positioning member 1323 has a sufficient stroke. The pivot is a pivot of the third transmission member 1321 rotating on the housing 110.

In one embodiment, referring to fig. 4 and 8, a rope guide 180 is disposed in the housing 110. One end of the pull rope passes through the rope guide pipe 180 and is connected with the fourth transmission member 1322, so that the pull rope is ensured to stably tighten the fourth transmission member 1322 through the rope guide pipe 180.

Specifically, referring to fig. 4 and 8, the rope guide 180 is disposed obliquely in the housing 110, so as to facilitate better placement of the pull rope. Also, a rope guide 180 is provided in the installation housing 120.

In one embodiment, referring to fig. 3 and 7, the push rod assembly 200 and the transmission assembly 130 are two. Two push rod assemblies 200 are located on opposite sides of the body 300. The housing 110 is connected between two push rod assemblies 200. The two transmission assemblies 130 correspond to the telescopic and rotational actions of the push rod assembly 200 at both sides of the locking body 300, respectively. It can be seen that the push rod mechanism of this embodiment is provided with two push rod assemblies 200, i.e. push rods on both sides can be contracted and folded. Of course, in other embodiments, the push rod mechanism may also be designed as one push rod assembly 200, i.e., one side of the push rod mechanism has the functions of collapsing and folding.

In one embodiment, referring to fig. 2, the housing 110 includes two first housings 111 that are matched with each other, and a portion of the first transmission assembly 131 and a portion of the second transmission assembly 132 are located in the two first housings 111. Likewise, the mounting case 120 also includes two second housings 121 that are mated with each other.

Alternatively, the two first housings 111 may be connected by a snap connection, a bolt connection, a pin connection, or the like. Likewise, the two second housings 121 may be connected by a snap connection, a bolt connection, a pin connection, or the like.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. A wheeled pushing tool, the wheeled pushing tool comprising:

the main body is provided with wheels for supporting the main body on a working surface;

The push rod assembly comprises a first push rod and a second push rod which is connected to the first push rod in a telescopic manner, the first push rod rotates between a first position and a second position relative to the main body, an included angle is formed between the first push rod and the working surface, the included angle of the first push rod in the first position is larger than that of the first push rod in the second position, and the second push rod can be close to or far away from the main body along the axial direction of the first push rod;

The unlocking mechanism comprises a shell, a transmission assembly and an unlocking button, wherein the transmission assembly is at least partially arranged in the shell, the transmission assembly at least comprises a first locking part, a second locking part and an unlocking part, the first locking part is used for locking the first push rod and the second push rod, the second locking part is used for locking the main body and the first push rod, the unlocking part is in transmission fit with the unlocking button, the unlocking button is movably arranged on the shell, at least one unlocking button triggers the unlocking part when the unlocking button moves, and the unlocking part respectively drives the first locking part and the second locking part to unlock simultaneously so as to change the telescopic state of the push rod assembly and the position state of the main body.

2. The wheel type pushing tool according to claim 1, wherein the main body is provided with a motor, the wheel type pushing tool further comprises a safety component arranged in the shell, the safety component is electrically connected with the motor, the safety component is in transmission fit with the unlocking button and can be in a connection or disconnection state relative to the movement of the unlocking button, the safety component can enable the motor to be in a start-disabled state when the first locking part and/or the second locking part are in an unlocking state, and the safety component can enable the motor to be in a start-enabled state when the first locking part and/or the second locking part are in a locking state.

3. The wheel type pushing tool according to claim 1, wherein the transmission assembly is divided into a first transmission assembly and a second transmission assembly, the first transmission assembly comprises a first transmission member, a second transmission member and a first positioning member which are in transmission fit in sequence, the first transmission member is in transmission fit with the unlocking button, and a first positioning hole for the first positioning member to penetrate is formed in the push rod assembly;

The second transmission assembly comprises a second positioning piece, a third transmission piece, a fourth transmission piece and a pull rope connected between the third transmission piece and the fourth transmission piece, the third transmission piece is in transmission fit with the unlocking button, the fourth transmission piece is in transmission fit with the second positioning piece, a second positioning hole for the second positioning piece to penetrate is formed in the main body, the first locking part is the end, close to the push rod assembly, of the first positioning piece, the second locking part is the end, close to the main body, of the second positioning piece, and the unlocking parts are the ends, close to the unlocking button, of the first transmission piece and the third transmission piece respectively.

4. The wheel type pushing tool according to claim 3, wherein the first transmission member and the second transmission member are both rotatably connected in the housing, one end of the second transmission member is connected with the first positioning member, the other end of the second transmission member is abutted against the first transmission member, and the unlocking button can drive the first transmission member to rotate and drive the second transmission member to rotate when moving.

5. The wheel type pushing tool according to claim 4, wherein the first transmission member is provided with a first engaging portion, and the second transmission member is provided with a second engaging portion engaged with the first engaging portion.

6. A wheeled pusher according to claim 3, wherein the housing is located between the first and second pushers in the axial direction of the first pushers, a support plate being provided in the housing, the first and second transmission assemblies being located on opposite sides of the support plate, respectively.

7. The wheel type pushing tool according to claim 6, wherein the unlocking button is provided with at least two abutting parts, and the at least two abutting parts are respectively in transmission fit with the first transmission assembly and the second transmission assembly, or

The unlocking buttons are at least two, each unlocking button is provided with an abutting portion, and the abutting portions on the two unlocking buttons are in transmission fit with the first transmission assembly and the second transmission assembly respectively.

8. The wheeled pusher tool of claim 3, wherein said unlocking mechanism further includes a first return member disposed within said housing for returning said first positioning member into said first positioning aperture and/or,

The unlocking mechanism further comprises a second reset piece, and the second reset piece is used for resetting the second positioning piece into the second positioning hole.

9. The wheel type pushing tool according to any one of claims 3 to 8, wherein a mounting shell is arranged at one end of the first push rod, which is close to the main body, the third transmission member is rotatably connected in the shell, the fourth transmission member is rotatably connected in the mounting shell, the unlocking button is pressed at one end of the third transmission member, the other end of the third transmission member is connected with one end of the fourth transmission member through the pull rope, and the other end of the fourth transmission member is in transmission connection with the second positioning member.

10. The wheeled pusher of any one of claims 1-8, wherein the pusher assembly and the transmission assembly are two, the two pusher assemblies being located on opposite sides of the body, the housing being connected between the two pusher assemblies, the two transmission assemblies respectively corresponding to the telescoping and rotating actions of the pusher assemblies locking the sides of the body.