CN103419564B - Multifunctional caster structure - Google Patents

Abstract

The invention discloses a multifunctional caster structure, which mainly aims at the problem that the common caster only has the functions of orientation, braking or turning and braking to cause insufficient applicability.

Description

Multifunctional caster structure

technical field

The invention relates to a caster, in particular to a caster structure with functions such as steering, orientation and braking.

Background technique

Generally, in order to make the carrier (hospital bed, precision instrument or workbench...) move conveniently and save effort, casters are usually arranged under the carrier. The original caster was a fixed non-rotatable design, which caused the carrier to go straight and not turn. Therefore, a swivel caster was developed on the market to provide the function of turning when the carrier is displaced. Subsequently, in order to prevent the caster from moving due to uneven ground or other factors when the caster is stationary, a pedal is designed for the caster, which allows people to control the brake stop after the carrier is displaced, such as China Taiwan patent announcement No. I338633, I343876, M424278, M422488, M414337 etc. all show a kind of caster wheel that has pedal and can carry out brake stop.

However, these common casters with braking function still have the following defects that need to be improved immediately in the actual use situation: when the carrier is equipped with swivel casters with braking function, when the carrier is moving, because the The casters can be rotated arbitrarily, so that during the straight-ahead displacement of the carrier, the thrust force applied to the carrier is likely to be uneven, so that the direction of travel and displacement of the carrier is not easy to be controlled.

Therefore, when the carrier is equipped with swivel casters, although the carrier can turn smoothly according to the requirements, there will be a defect that it is difficult to control the direction of the carrier's travel displacement during the straight-line displacement process. When there are the most traditional casters (that is, fixed non-rotatable casters), although the carrier can be controlled in the straight displacement direction, it is not easy to perform the displacement of turning.

Contents of the invention

The technical problem to be solved by the present invention is to provide a multifunctional caster structure, which mainly enables the caster to perform functions such as steering, orientation, and braking according to requirements, so as to improve the convenience of use of the caster.

In order to solve the above problems, the present invention provides a multifunctional caster structure, which includes: a positioning seat with a shaft; a rotating seat, which is rotatably arranged on the positioning seat and has a shaft pivotally arranged on the shaft; A pivot part; a locking piece fixed in the rotating base, and has a locking hole and a locking tooth; a wheel body, which is rotatably arranged in the rotating base, and has a wheel tooth; a brake The car swing piece has a brake hub pivotally arranged on the swivel seat, a brake pressure receiving part located on one side of the brake hub, and a brake hub located on the other side of the brake hub and clamped or disengaged from the brake hub. The brake tooth portion of the gear tooth portion; a longitudinal rod group, which can be axially movably arranged in the shaft portion and the swivel seat along the shaft portion, and has a first end portion, a pressure against the brake the second end of the upper part, and a first and second shoulder between the first and second ends; a catch group, set between the first and second shoulders of the longitudinal bar group, It also has a locking convex portion that engages or disengages from the locking hole, and a locking tooth portion that engages or disengages from the locking tooth; a cross bar is located in the shaft portion and has a contact against the first end The pushing part, and a pressure receiving part opposite to the pushing part; an operating pedal, which is swingably arranged on the positioning seat, and has an operating pivot part pivoted on the positioning seat, and an operating pedal located on the operating seat. An operating step at one end of the pivot, and a directional step, a normal step, and a brake step that are located at the other end of the operating pivot and are respectively pressed against the pressure-receiving part of the crossbar, when the normal step and the Pressed by the pressure part, the locking convex part and the locking tooth part of the locking group are separated from the locking holes and locking teeth of the locking part, and the braking tooth part of the brake pendant is separated from the tooth part of the wheel body. , so that the rotating seat rotates relative to the positioning seat, and the wheel body rotates relative to the rotating seat. When the directional step part is pressed against the pressed part, the locking convex part of the locking group is locked in the locking hole, so that The swivel seat cannot rotate relative to the positioning seat. When the brake step portion is pressed against the pressure receiving portion, the locking tooth portion of the locking group is locked by the locking tooth and the braking tooth portion of the brake rocker. The gear tooth portion of the wheel body prevents the wheel body from rotating relative to the rotating seat; once the pedal is released, it can be reset on the positioning seat after swinging, and the normal step of the operating pedal is aligned with the pressed Part of the pressure arrived.

Preferably, the positioning seat further has a fixing portion fixed under the carrier.

Preferably, a bearing is provided between the pivot portion of the rotating seat and the shaft portion of the positioning seat.

Preferably, the longitudinal rod set includes a first longitudinal rod and a second longitudinal rod, wherein the first longitudinal rod can be axially movably arranged in the shaft portion along the shaft portion, and has the first end portion, a first joint opposite to the first end, and the first shoulder between the first end and the first joint, the second longitudinal bar has a connecting portion connected to the first joint The second coupling portion, a second end opposite to the second coupling portion and against the brake pressure receiving portion, and a first coupling portion located between the second coupling portion and the second end Two shoulders.

Preferably, the catch set includes a washer, a first tooth, a second tooth, and a spring, wherein the washer is sleeved on the second coupling portion and leans against the second shoulder, the The first tooth part is sleeved on the second joint part and has the locking tooth part and an inner tooth hole. The second tooth part is sleeved on the second joint part and pressed against the washer and has a supply The tooth slot where the first coupling part is inserted, a ring part pressed against by the first shoulder part, the locking convex part arranged around the ring part, and a penetrating and fastening part on the first tooth part In the tooth part of the inner tooth hole, the spring is arranged between the ring part of the first tooth part and the second tooth part.

Preferably, the first end of the first longitudinal bar abuts against the abutting portion of the cross bar on an inclined plane.

Preferably, the swivel base includes a main base body with the pivot portion, and an auxiliary base body fixed on the main base body for pivoting the brake rocker and having a supporting portion, the brake rocker There is also a brake springing portion connected to the brake pressing portion, and the brake springing portion leans against the supporting portion so that the brake pressing portion keeps pushing against the vertical rod set upward.

Preferably, the release pedal has a release pivot portion pivotally arranged on the positioning seat, a release pedal portion located at one end of the release pivot portion, a first release convex portion and a first relief portion located at the other end of the release pivot portion. Two releasing protrusions, the operating pedal further has a first abutting surface on the same side as the operating pedal, and a second abutting surface on the same side as the directional step, when the directional step is pressed against the pressed portion Arresting, the first abutting surface abuts against the first releasing convex portion, and when the brake step portion is pressed against the pressure receiving portion, the second abutting surface abuts against the second releasing convex portion.

The multi-functional caster structure of the present invention, by stepping down or pulling the operating pedal upward, the longitudinal bar group drives the catch group and the catch member fixed on the swivel seat to lock or disengage each other, and the brake The car ornament and the wheel body pivoted on the swivel seat are locked or disengaged from each other, so that the caster can perform functions such as steering, orientation, and braking according to requirements, so as to improve the convenience of use of the caster.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the present invention;

Fig. 2 is a three-dimensional combined view of the present invention;

Fig. 3 is a three-dimensional combined view of the present invention, showing the combined state of the positioning seat, the locking member, the longitudinal bar group, the locking group, the operating pedal, and the releasing pedal;

Fig. 4 is a three-dimensional combined view of the present invention, showing the combined state of operating the pedal and releasing the pedal;

Fig. 5 is the sectional view of Fig. 2 line segment 5-5;

Fig. 6 is an action diagram of the present invention, showing the state that the caster wheel performs the steering function;

Fig. 7 is an action diagram of the present invention, showing the state of the caster wheel performing the braking function;

Fig. 8 is an action diagram of the present invention, showing the state of releasing the brake function of the caster;

Fig. 9 is an action diagram of the present invention, showing the state of the caster carrying out the orientation function;

Fig. 10 is an operation diagram of the present invention, showing the state of canceling the caster orientation function.

Explanation of reference signs

200 is the carrier

100 is a positioning seat 101 is a fixed part

102 is the shaft

10 is the swivel seat 11 is the main seat body

111 is the hub 12 is the auxiliary base

121 is the supporting part 13 is the bearing

20 is the catch piece 21 is the catch hole

22 is the locking tooth

30 is the wheel body 31 is the gear teeth

32 is a wheel 33 is a pivot

40 is the brake ornament 41 is the brake hub

42 is the brake pressure receiving part 43 is the brake tooth part

44 is the brake rebounding part

50 is the joystick group 51 is the first joystick

511 is the first end 512 is the first joint

513 is the first shoulder 52 is the second longitudinal bar

521 is the second junction 522 is the second end

523 is the second shoulder

60 is the catch group 61 is the washer

62 is the first tooth part 621 is the locking tooth part

622 is the internal gear hole 63 is the second tooth

631 is the alveolar 632 is the ring

633 is the card convex part 634 is the tooth part

64 is spring

70 is a cross bar 71 is a pushing part

72 is the pressure receiving part

80 is the operating pedal 81 is the first spring

82 is the operating hub 83 is the operating pedal

84 is the directional step part 85 is the normal step part

86 is the brake step part 87 is the first contact surface

88 is the second arrival

90 is to release the pedal 91 is the second spring

92 is to release the hub 93 is to release the pedal

94 is the first release convex part 95 is the second release convex part

Detailed ways

Referring to Figures 1 to 5, a multifunctional caster structure provided by the embodiment of the present invention is suitable for being located under a carrier 200. The wheel body 30, a brake ornament 40, a longitudinal bar group 50, a catch group 60, a cross bar 70, an operating pedal 80, and a release pedal 90 are composed, wherein:

The positioning seat 100 has a fixed part 101 and a shaft part 102 fixed on the bottom of the carrier 200, wherein the fixed part 101 can be fixed on the bottom of the carrier 200 by means of screws, etc., and the shaft part 102 is Extend downward from the fixing portion 101 .

The swivel base 10 is rotatably arranged on the positioning base 100, and has a pivot portion 111 pivotally disposed on the shaft portion 102; in this embodiment, the swivel base 10 includes a main base body with the pivot portion 111 11. And an auxiliary seat body 12 fixed on the main seat body 11 and having a support portion 121, and a bearing 13 is provided between the pivot portion 111 and the shaft portion 102 of the positioning seat 100, so that the rotation The base 10 can rotate relative to the positioning base 100 .

The locking member 20 is fixed in the rotating seat 10 and has a locking hole 21 and a locking tooth 22, wherein the locking hole 21 has a distance from the locking tooth 22, and the locking The hole 21 is closer to the shaft portion 102 than the locking tooth 22 .

The wheel body 30 is rotatably arranged on the main base body 11 of the swivel base 10, and has a tooth portion 31. The wheel body 30 is mainly composed of two wheel parts 32, and is passed through by a pivot shaft 33. Place the wheel body 30 and the main base body 11 .

The brake rocker 40 has a brake pivot 41 pivotally arranged on the auxiliary base 12 of the swivel base 10, a brake pressure receiving portion 42 on one side of the brake pivot 41, and a brake pivot 42 on the brake pivot 41. The brake tooth part 43 on the other side of the pivot part 41 is locked or disengaged from the gear tooth part 31; in this embodiment, the brake pendant 40 further has a brake rebound part 44 connected to the brake pressure receiving part 42 , the brake springing portion 44 leans against the supporting portion 121 of the auxiliary seat 12 , so that the brake pressing portion 42 has an upward pushing force.

The longitudinal rod set 50 can be axially movably arranged in the shaft portion 102 and the rotating seat 10 along the shaft portion 102 , and has a first end portion 511 and a first end portion abutting against the brake pressure receiving portion 42 . The two end portions 522, and the first and second shoulder portions 513, 523 arranged between the first and second end portions 511, 522 are kept pushed against the longitudinal rod set 50 upward by the brake pressure receiving portion 42. state; in this embodiment, the longitudinal rod set 50 includes a first longitudinal rod 51 and a second longitudinal rod 52, wherein the first longitudinal rod 51 can be axially movably arranged on the shaft portion 102 102, and can not rotate relative to the shaft 102, the first longitudinal rod 51 has the first end 511, a first joint 512 opposite to the first end 511, and is located at the first end part 511 and the first shoulder 513 between the first coupling part 512, the second longitudinal rod 52 is movably inserted in the auxiliary base body 12, and cannot rotate relative to the auxiliary base body 12, the second vertical rod 52 is The two longitudinal rods 52 have a second joint portion 521 connected to the first joint portion 512, a second end portion 522 opposite to the second joint portion 521 and against the brake pressure receiving portion 42, and A second shoulder 523 located between the second connecting portion 521 and the second end 522 .

The locking group 60 is assembled between the first and second shoulders 513, 523 of the longitudinal bar group 50, and has a locking protrusion that is locked or disengaged from the locking hole 21 of the locking member 20, and a Engage or disengage the latching tooth part of the latching tooth 22 of the latching member 20; in this embodiment, the latching group 60 includes a washer 61, a first tooth 62, a second tooth 63, and a spring 64 , wherein the washer 61 is sleeved on the second joint portion 522 of the second longitudinal rod and leans against the second shoulder 523, the first tooth 62 is sleeved on the second joint portion 522, and has the The locking tooth part 621 and an inner tooth hole 622, the second tooth part 63 is sleeved with the second joint part 522 and pressed against the washer 61, and has a first joint part 512 for the first end rod 511 Inserted tooth groove 631, a ring portion 632 pressed against by the first shoulder portion 513, the engaging convex portion 633 arranged around the ring portion 632, and a penetrating and fastening on the first tooth piece 62 the tooth part 634 of the inner tooth hole 622 , the spring 64 is arranged between the first tooth part 62 and the second tooth part 63 ring part 632 .

The cross bar 70 is disposed in the shaft portion 102 and has a pushing portion 71 against the first end portion 511 of the first longitudinal bar 51 and a pressure receiving portion 72 opposite to the pushing portion 71 ; In this embodiment, the pushing portion 71 and the first end portion 511 of the first longitudinal rod 51 lean against on an inclined plane.

The operating pedal 80 is swingably arranged on the positioning seat 100 by the first spring 81, and has an operating pivot portion 82 pivotally disposed on the positioning seat 100, and an operating pedal portion located at one end of the operating pivot portion 82. 83, and a directional step 84, a normal step 85, and a brake step 86 that are located at the other end of the operating pivot 83 and are pressed against the pressed portion 72 of the crossbar 70 respectively. In this embodiment, the operation The pedal 80 further has a first abutment surface 87 on the same side as the operating pedal portion 83 and a second abutment surface 88 on the same side as the directional step portion 84, by which the directional step portion 84, the normal step portion 85, and the brake step portion 86 are respectively pressed against the pressure receiving portion 72 of the cross bar 70 to make the caster perform functions such as orientation, steering, and braking, so as to improve the convenience of use of the caster.

The release pedal 90 is resettable on the positioning seat 100 after swinging by the second spring 91, and the normal step portion 85 of the operating pedal 80 is pressed against the pressure receiving portion 72 by stepping on it; in this embodiment, The release pedal 90 has a release pivot portion 92 pivotally arranged on the positioning seat 100 , a release pedal portion 93 located at one end of the release pivot portion 92 , and a first release convex portion 94 located at the other end of the release pivot portion 92 and a second releasing convex portion 95, when the orientation step portion 84 is pressed against the pressed portion 72, the first abutting surface 87 is pressed against the first releasing convex portion 94, and when the braking step portion 86 is pressed against the pressed portion 72 The pressing portion 72 is pressed against, and the second abutting surface 88 is abutted against the second releasing convex portion 95 .

The above is the description of the structure and configuration of each main component of the embodiment of the present invention. As for the action mode of the present invention and its effect, the following description is made.

When the caster of the present invention performs the steering function, as shown in FIG. 6 , the normal step portion 85 of the operating pedal 80 is pressed against the pressure receiving portion 72 of the cross bar 70 . The tooth portion 621 and the engaging convex portion 633 of the second tooth member 63 are separated from the engaging tooth 22 and the engaging hole 21 of the engaging member 20 respectively, and at the same time, the braking tooth portion 43 of the braking rocker 40 is separated from the wheel body The tooth part 31 of 30 makes the swivel base 10 rotate relative to the positioning base 100, and the wheel body 30 rotates relative to the swivel base 10. Accordingly, the carrier provided with the caster wheel of the present invention can perform the steering action.

When the caster of the present invention performs the braking function, as shown in FIGS. The second abutment surface 88 of the operating pedal 80 abuts against the second release protrusion 95 of the release pedal 90. At this time, the cross bar 70 moves a distance toward the first longitudinal bar 51, allowing the first vertical bar 51 to A vertical rod 51 and the second vertical rod 52 are displaced downward by a distance, and at the same time, the first and second vertical rods 51, 52 drive the locking tooth portion 621 of the first tooth member 62 and the locking teeth of the locking member 20 22 lock each other, so that the swivel seat 10 cannot rotate relative to the positioning seat 100; in addition, the second end 521 of the second longitudinal rod 52 presses against the brake pressure receiving part 42, so that the brake rocker 40 can smoothly The hour hand pivots at an angle, and finally the brake tooth portion 43 of the brake pendulum 40 is locked on the gear tooth portion 31 of the wheel body 30, so that the wheel body 30 cannot rotate relative to the rotating base 10. Accordingly, there is The carrier of the caster wheel of the present invention can achieve the function of braking and stopping.

When wanting to release the brake function, as shown in FIG. 8 , the release pedal 93 of the release pedal 90 can be stepped on downwards, so that the second release convex portion 95 is pushed against the second contact surface 88 of the operation pedal 80. The operating pedal 80 pivots at an angle with time, and returns to the state where the normal step portion 85 of the operating pedal 80 is pressed against the pressure receiving portion 72 of the cross bar 70 , as shown in FIG. 6 .

When the caster of the present invention performs the orientation function, as shown in FIGS. , and the first abutting surface 87 of the operating pedal 80 abuts against the first releasing convex portion 94 of the releasing pedal 90. At this time, the cross bar 70 has a space to move in the opposite direction to the first vertical bar 51, and mutually The connected first and second longitudinal rods 51 and 52 are pushed upward by a distance by the brake pressure receiving part 42 of the brake rocker 40 , and at the same time the first and second longitudinal rods 51 and 52 drive the second gear 63 The locking protrusion 633 and the locking hole 21 of the locking member 20 are mutually locked so that the rotating base 10 cannot rotate relative to the positioning base 100; Pressed against by the second end 521 of the second longitudinal rod 52, the brake tooth portion 43 of the brake rocker 40 is separated from the gear tooth portion 31 of the wheel body 30, so that the wheel body 30 is relatively opposite to the rotating base 10 At this time, since the swivel base 10 cannot rotate relative to the positioning base 100, and the wheel body 30 can rotate relative to the swivel base 10, the carrier provided with the caster of the present invention can be displaced in a specific direction.

When desiring to release the orientation function, as shown in FIG. 10 , the release pedal 93 of the release pedal 90 can be stepped on downwards, so that the first release protrusion 94 is pushed against the first abutment surface 87 of the operation pedal 80. This operation The pedal 80 then pivots an angle counterclockwise, and returns to the state where the normal step portion 85 of the operating pedal 80 is pressed against the pressed portion 72 of the cross bar 70 .

In summary, the present invention can indeed enable the caster to perform functions such as steering, orientation, and braking according to needs, so as to improve the convenience of use of the caster, and the above-mentioned embodiments and illustrations are only examples of the present invention. The preferred embodiment is only the preferred embodiment, and should not be used to limit the implementation scope of the present invention, that is, all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope covered by the patent of the present invention.

Claims (8)

1. a Multifunctional castor structure, is characterized in that: comprise:

One positioning seat, has an axle portion;

One rotary seat, is located at this positioning seat rotationally, and has the pivot portion that is hubbed at this axle portion;

One holding piece, is fixedly arranged in this rotary seat, and has a clip hole and a clip tooth;

One wheel body, is located at this rotary seat rotationally, and has and take turns teeth portion;

One Brake car goods of furniture for display rather than for use, has Brake car compression zone and that a Brake car pivot portion, being hubbed at this rotary seat is positioned at this side, Brake car pivot portion and is positioned at this Brake car pivot portion's opposite side and blocking or depart from the Brake skiving portion that this takes turns teeth portion;

One vertical pole group, can prolong this axle portion and be located at axially and movably in this axle portion and this rotary seat, and has a first end, and be located at first and second shoulder between this first and second end against the second end and of Gai Brake car compression zone;

One clip group, between first and second shoulder being mounted on this vertical pole group, and has a blocking or departs from the card convex portion in this clip hole and an engagement or depart from the ratchet clamping part of this clip tooth;

One cross bar, is located in this axle portion, and has one to be in reverse to this pushing and pressing part compression zone against the pushing and pressing part and of this first end;

One operating pedal, be located at this positioning seat swingably, and there is the operation pivot portion that is hubbed at this positioning seat, portion is stepped in one operation being positioned at this one end, operation pivot portion, and one is positioned at this operation pivot portion's other end and the directed rank portion compressed with this cross bar compression zone respectively, normality rank portion, Ji Brake car rank portion, when this normality rank portion and this compression zone compress, the card convex portion of this clip group and ratchet clamping part depart from clip hole and the clip tooth of this holding piece respectively, the Brake skiving portion of this Brake car goods of furniture for display rather than for use departs from the wheel teeth portion of this wheel body, this rotary seat is rotated relative to this positioning seat, this wheel body rotates relative to this rotary seat, when this directed rank portion and this compression zone compress, the card convex portion of this clip group is equipped in this clip hole, this rotary seat cannot be rotated relative to this positioning seat, Gai Brake car rank portion of Dang and this compression zone compress, the ratchet clamping part of this clip group is equipped in this clip tooth, the Brake skiving portion of this Brake car goods of furniture for display rather than for use is equipped in the wheel teeth portion of this wheel body, this wheel body cannot be rotated relative to this rotary seat,

One removes pedal, can be located at this positioning seat with resetting after swing, through trampling the normality rank portion that makes this operating pedal and this compression zone compresses.

2. Multifunctional castor structure as claimed in claim 1, is characterized in that: described positioning seat has more one and is fixedly arranged on fixed part below carrier.

3. Multifunctional castor structure as claimed in claim 1, is characterized in that: be provided with a bearing between the pivot portion of described rotary seat and the axle portion of this positioning seat.

4. Multifunctional castor structure as claimed in claim 1, it is characterized in that: described vertical pole group comprises one first vertical pole and one second vertical pole, wherein this first vertical pole can prolong this axle portion and is located in this axle portion axially and movably, and there is this first end, one the first joint portion being in reverse to this first end, and this first shoulder between this first end and this first joint portion, this second vertical pole has the second joint portion of this first joint portion of a connection, one is in reverse to this second joint portion and against this second end of Gai Brake car compression zone, and this second shoulder between this second joint portion and this second end.

5. Multifunctional castor structure as claimed in claim 4, it is characterized in that: described clip group includes a packing ring, one first tooth, one second tooth, and a spring, wherein this packing ring is this second joint portion sheathed and abuts against at this second shoulder, this first tooth is this second joint portion sheathed, and there is this ratchet clamping part, and perforation in, this second tooth is this second joint portion sheathed and is pressed against this packing ring, and there is a teeth groove planted for this first joint portion, one ring portion compressed by this first shoulder, be located on this card convex portion of this ring portion week side, and one places the teeth portion being fastened in perforation in this first tooth, this spring is provided between this first tooth and this second tooth ring portion.

6. Multifunctional castor structure as claimed in claim 4, is characterized in that: the first end of described first vertical pole and this cross bar pushing and pressing part abut against in inclined-plane.

7. Multifunctional castor structure as claimed in claim 1, it is characterized in that: described rotary seat includes a main base frame and with this pivot portion and is fixedly arranged on this main base frame and is pivoted for this Brake car goods of furniture for display rather than for use and has the auxiliary pedestal of a bearing and leaning portion; this Brake car goods of furniture for display rather than for use has more the butted portion of Brake car of this Brake car compression zone of a connection; this butted portion of Brake car bears against this bearing and leaning portion, make this Brake car compression zone keep this vertical pole group of pushing and pressing state upwards.

8. Multifunctional castor structure as claimed in claim 1, it is characterized in that: described releasing pedal has the releasing pivot portion that is hubbed at this positioning seat, portion is stepped in one releasing being positioned at this one end, releasing pivot portion, and one be positioned at this releasing pivot portion other end first remove protuberance and one second remove protuberance, this operating pedal has more one and steps on first of portion's homonymy to face with this operation, and one and this directed rank portion homonymy second support face, when this directed rank portion and this compression zone compress, this first support face abut against this first remove protuberance, Gai Brake car rank portion of Dang and this compression zone compress, this second support face abut against this second remove protuberance.