TWI638731B - Caster - Google Patents

Abstract

The invention relates to a caster comprising a body, a control component, a brake slider and a limiting component. The body defines an axial direction, and includes a pin and a wheel seat. The wheel seat is pivotally connected to the pin along the axial direction, and at least one wheel system is pivoted to the wheel base. The wheel seat is provided with at least one groove. The control assembly includes a cam and a brake member, the brake member is provided with a first tooth portion on one side of the axial direction, and at least one cam portion on the other side, and a first elastic member is used to normally fix the brake member. Bounce in the direction of the cam.

Description

Casters

The invention relates to a caster.

The caster, which generally has a brake function, is basically composed of a body and a wheel body pivotally connected to the body. A brake unit is arranged between the body and the wheel body, and the brake unit is driven by The metal plate is pressed against the wheel body, and one end edge of the body is pivotally connected with a pin, and the pin can be assembled to the bottom of the supported frame by the pin, when the frame is prepared to be displaced, The pivoting of the pin and the body can effectively cause the body to drive the wheel body to rotate in a multi-directional manner to smoothly move the frame body, and when the operator moves the frame body to a predetermined position, the brake unit can be pressed. On the wheel body to prevent the wheel from rolling to achieve the effect of braking. This is the case with the casters disclosed in TWM298527.

However, although such a conventional caster can prevent the wheel from rolling, since the pin and the system are still in a mutually pivotable state, when the frame is pushed by an external force, the frame and the pin are caused by the wheel. The contact point between the body and the ground rotates for the axis, which still causes the frame and the pin to still be displaced relative to the ground, and the article placed on the frame is easily shaken or even dropped, and there is a defect that needs to be improved.

Therefore, it is necessary to provide a novel and progressive caster to solve the above problems.

The main object of the present invention is to provide a caster that can be quickly switched to three states, such as directional sliding, braking, and free sliding, to adjust according to the use condition, and the caster has a simple structure and convenient operation.

To achieve the above object, the present invention provides a caster comprising a body, a control assembly, a brake slider and a limit member. The body defines an axial direction, and includes a pin and a wheel seat. The wheel seat is pivotally connected to the pin along the axial direction, and at least one wheel system is pivoted to the wheel base. The wheel seat is provided with at least one groove. The control assembly includes a cam and a brake member. The cam is radially provided with a first protrusion, a second protrusion and a third protrusion. The first protrusion has a radial dimension smaller than the second protrusion. The radial dimension of the second protrusion is smaller than the radial dimension of the third protrusion. The cam is pivoted on the body and is rotatable in a certain position, an active position and a locked position. The brake member is slidably disposed on the body along the axial direction and is rotatable relative to the pin. The brake member is provided with a first tooth portion along one side of the axial direction and at least one card protrusion on the other side. The elastic member resiliently urges the brake member toward the cam. The brake slider is disposed at one end of the brake member away from the cam, and the brake member is slidably coupled with the brake slider. The limiting member is coupled to the wheel base and is provided with a plurality of jacks along the axial direction. Wherein, when the cam is rotated to the orientation position, the brake member abuts against the first convex portion and each of the card projections is inserted into the groove, and the pin cannot rotate relative to the wheel seat; When the cam rotates to the movable position, the braking member abuts against the second convex portion and each of the card protrusions is disengaged from the groove, and the pin is rotatable relative to the wheel seat; when the cam is rotated to the locked position The brake member abuts against the third protrusion, the first tooth portion is inserted into the insertion hole, and the brake member drives the brake slider to abut the at least one wheel body, and the pin cannot be opposite The wheel base rotates and the at least one wheel body cannot rotate.

1‧‧‧ Ontology

24‧‧‧ card convex

2‧‧‧Control components

25‧‧‧First elastic parts

3‧‧‧煞Car Slider

26‧‧‧ dish

4‧‧‧Limited parts

27‧‧‧Bump

11‧‧‧Axial

271‧‧‧ ring groove

12‧‧‧ pins

28‧‧‧fasteners

13‧‧‧ wheel seat

211‧‧‧First convex

14‧‧‧ wheel body

212‧‧‧second convex

15‧‧‧ Groove

213‧‧‧3rd convex

16‧‧ ‧ Palin

231‧‧‧ teeth

131‧‧‧Circle

31‧‧‧煞车弧面

132‧‧‧ top board

32‧‧‧Abut the convex part

133‧‧‧ side panels

41‧‧‧ jack

21‧‧‧ cam

42‧‧‧section

22‧‧‧Brakes

43‧‧‧Bend section

23‧‧‧First tooth

44‧‧‧Limited paragraph

1 is a perspective view of a preferred embodiment of the present invention.

2 is an exploded view of a preferred embodiment of the present invention.

Figure 3 is a partial exploded view of a preferred embodiment of the present invention.

Figure 4 is a side cross-sectional view of a preferred embodiment of the present invention.

5 through 7 are cross-sectional views showing the operation of a preferred embodiment of the present invention.

FIG. 8 is a schematic view of the first tooth portion being inserted into the jacks.

Figure 9 is another partial exploded view of a preferred embodiment of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIGS. 1 through 5, a preferred embodiment of the present invention is shown. The caster of the present invention includes a body 1, a control assembly 2, a brake slider 3, and a limit member 4.

The body 1 defines an axial direction 11 , and includes a pin 12 and a wheel seat 13 . The wheel base 13 is pivotally connected to the pin 12 along the axial direction 11 , and at least one wheel body 14 is pivotally mounted on the wheel base 13 . The wheel base 13 is provided with at least one recess 15 . In the embodiment, the wheel base 13 is pivotally provided with two wheel bodies 14 and two opposite grooves 15 are provided. The pins 12 can be additionally assembled. A frame (such as a scaffold or a trolley, not shown) for quick movement of the frame.

The control unit 2 includes a cam 21 and a brake member 22. The cam 21 is radially provided with a first protrusion 211, a second protrusion 212 and a third protrusion 213. The radial direction of the first protrusion 211 The dimension is smaller than the radial dimension of the second protrusion 212. The radial dimension of the second protrusion 212 is smaller than the radial dimension of the third protrusion 213. The cam 21 is pivotally mounted on the body 1 and can be rotated. An directional position, a movable position, and a locked position, the brake member 22 is slidably disposed on the body 1 along the axial direction 11 and is rotatable relative to the pin 12. The brake member 22 is disposed along one side of the axial direction 11 There is a first tooth portion 23, and the other side is provided with at least one card protrusion 24, and a first elastic member 25 elastically biases the brake member 22 toward the cam 21 by rotating the cam 21 The brake member 22 can be controlled to slide relative to the body 1 so that the brake member 22 abuts between the first convex portion 211 and the third convex portion 213.

The brake slider 3 is disposed at one end of the brake member 22 away from the cam 21, and the brake member 22 is slidably coupled with the brake slider 3. Preferably, the brake slider 3 is provided with a braking arc surface 31. The curvature of the braking surface 31 corresponds to the outer circumferential surface of the second wheel body 14 to have a better braking effect. The braking member 22 is a non-circular cylinder. So that the brake member 22 cannot rotate relative to the pin 12.

The limiting member 4 is connected to the wheel base 13 and is provided with a plurality of insertion holes 41 along the axial direction 11 . In this embodiment, the wheel base 13 includes a top plate 132 and two side plates 133 disposed at opposite ends of the top plate 132. The two wheel bodies 14 are pivotally disposed between the two side plates 133. The top plate 132 faces one side of the two-wheel body 14.

Please further refer to FIGS. 5 to 8 , wherein when the cam 21 is rotated to the orientation position (as shown in FIG. 5 ), the braking member 22 abuts against the first convex portion 211 and each of the locking portions 24 is inserted. Provided in a groove 15, the pin 12 cannot be rotated relative to the wheel base 13, and the frame can be moved only in a straight line and cannot turn; when the cam 21 is rotated to the active position (as shown in FIG. 6) The braking member 22 abuts against the second convex portion 212 and each of the locking protrusions 24 is disengaged from the groove 15. The pin 12 is rotatable relative to the wheel base 13 to freely move the frame body and turn When the cam 21 is rotated to the locked position (as shown in FIG. 7 ), the braking member 22 abuts against the third convex portion 213 , and the first tooth portion 23 is inserted into the insertion holes 41 and the The brake member 22 drives the brake slider 3 to abut against the two-wheel body 14, and the pin 12 cannot rotate relative to the wheel base 13 and the two-wheel body 14 cannot rotate, thereby preventing the two-wheel body 14 from rotating. When the frame body is pushed by an external force, the wheel base 13 and the pin 12 are still relatively rotated to move the frame body relative to the ground. Therefore, the caster can control the rotation of the two-wheel body 14 and control the rotation relationship between the pin 12 and the wheel base 13 by rotating the cam 21 in the orientation position, the active position and the locking position, so as to achieve Actual use purpose.

Specifically, the limiting member 4 includes a set of connecting portions 42, a bending portion 43 and a limiting portion 44. The connecting portion 42 is assembled with the wheel base 13, and the limiting portion 44 is worn. The jacks 41 are provided, and the brake member 22 is located on the side of the limiting portion 44 facing the cam 21.

Further, in the embodiment, the first tooth portion 23 is ring-shaped, and the plurality of teeth 231 of the first tooth portion 23 extend along the axial direction 11 toward the two-wheel body 14. The holes 41 are radially arranged in a radial direction to match the shape of the first tooth portion 23 so that the first tooth portion 23 can be easily inserted into the insertion holes 41. Preferably, the limiting member 4 is an elastic flexible sheet body. When the first tooth portion 23 abuts the limiting portion 44, the bending portion 43 and the limiting portion 44 are reversibly The tooth portion 23 is urged to swing in the direction of the two-wheel body 14. In detail, when a portion of the first tooth portion 23 is not accurately aligned with the sockets 41, only the limit is reached. In the case of the segment 44, the limiting segment 44 and the bending segment 43 are swung in the direction of the two-wheel body 14 and the insertion holes 41 are arranged in a radial oblique direction (as shown in FIG. 8). When the insertion holes 41 are offset and the portions of the teeth 231 located in the first tooth portion 23 are smoothly inserted into the insertion holes 41, the first tooth portion 23 and the insertion holes 41 need not be accurately aligned. The first tooth portion 23 can be smoothly inserted into the insertion holes 41 to improve the operation convenience.

In the embodiment, the brake member 22 is radially disposed with a disk body 26 disposed on the disk body 26 and extending in the direction of the cam 21 along the axial direction 11. The first tooth portion 23 is The ring is disposed on the disk body 26. In addition, the wheel base 13 is provided with a ring wall 131. The ring wall 131 is provided with a Palin 16, and the pin 12 is inserted into the inner peripheral wall of the Palin 16 so that the pin 12 can smoothly face the wheel. The seat 13 rotates.

It is to be noted that, as shown in FIG. 2 and FIG. 9 , in the embodiment, the brake member 22 is disposed at one end of the two-wheel body 14 with a protrusion 27 , and the protrusion 27 is provided with a ring groove 271 . The slider 3 is sleeved on the protrusion 27, and a fastener 28 is fastened to the ring groove 271 to limit the brake slider 3 between the protrusion 27 and the disk body 26 and the fastener 28. The two sides of the two side plates 133 are respectively disposed with an abutting protrusion 32, and the two abutting protrusions 32 are respectively abutted between the two side plates 133, and the two side plates 133 can be limited to the brake slider 3 In order to prevent the brake slider from rotating relative to the boss 27, so that the brake slider 31 of the brake slider 3 For example, the fastener 28 is a C-shaped fastener for convenient disassembly and assembly, and the brake slider 3 and the boss 27 have a slidable gap when the brake slider 3 is When the braking surface 31 of the braking device is in contact with the second wheel body 14, the braking slider 3 can slightly slide relative to the protruding column 27 so that the braking surface 31 of the braking block 3 can be in surface contact with the two-wheel body. 14, in order to achieve the best brake effect.

In summary, the caster of the present invention can control the rotation of the two-wheel body and control the rotation relationship between the pin and the wheel seat by rotating the cam in the orientation position, the active position and the locking position. Actual use purpose. In addition, by the swaying of the limiting segment and the bending segment in the direction of the two-wheel body and the insertion of the sockets in a radial direction, the sockets can be offset to be located in the first tooth portion. Some of the gear members can be smoothly inserted into the jacks, so that the first tooth portion can be smoothly inserted into the jacks without accurately aligning the first tooth portions with the jacks. To improve the ease of operation.

Claims (9)

A caster includes: a body defining an axial direction, comprising a pin and a wheel seat, the wheel base being pivotally connected to the pin along the axial direction, at least one wheel system being pivoted on the wheel seat, the wheel seat being provided At least one groove; a control component comprising a cam and a brake member, wherein the cam is radially provided with a first protrusion, a second protrusion and a third protrusion, and the radial dimension of the first protrusion is The radial dimension of the second convex portion is smaller than the radial dimension of the third convex portion. The cam is pivotally disposed on the body and can be rotated at a certain position and an active position. And a locking position, the braking member is slidably disposed on the body along the axial direction and cannot rotate relative to the pin, the braking member is provided with a first tooth portion along one side of the axial direction and at least one of the other side a card protrusion, a first elastic member elastically abutting the brake member toward the cam; a brake slider disposed at a side of the brake member away from the cam, the brake member sliding with the brake slider a limiting member is coupled to the wheel base and is provided with a plurality of jacks along the axial direction, wherein the The seat includes a top plate and two side plates disposed at two ends of the top plate. The at least one wheel system is pivotally disposed between the two side plates, and the limiting member is assembled on the side of the top plate facing the at least one wheel body; When the cam rotates to the orientation position, the brake member abuts against the first convex portion and each of the card protrusions is inserted into a groove, and the pin cannot rotate relative to the wheel seat; when the cam rotates to the position In the movable position, the braking member abuts against the second convex portion and each of the card protrusions is disengaged from the groove, and the pin is rotatable relative to the wheel seat; when the cam is rotated to the locking position, the braking member Abutting the third protrusion, the first tooth portion is inserted into the socket, and the brake member drives the brake slider to abut against the at least one wheel body, and the pin cannot rotate relative to the wheel seat And the at least one wheel body cannot rotate. The caster of claim 1, wherein the limiting member comprises a set of connecting segments, a bending segment and a limiting segment, wherein the connecting segment is assembled with the wheel seat, and the limiting segment is disposed. There are such jacks, and the brake member is located on the side of the limit portion facing the cam. The caster of claim 2, wherein the first tooth portion is ring-shaped, and the plurality of teeth of the first tooth portion extend along the axial direction toward the at least one wheel body, and the jacks are Radially arranged diagonally. The caster of claim 3, wherein the limiting member is an elastic flexible sheet body, and the bending portion and the limiting portion are retrievably retracted when the first tooth portion abuts the limiting portion The first tooth portion pushes against the swing in the direction of the at least one wheel body. The caster according to claim 1, wherein the brake member is radially provided with a disk body, the at least one card is protruded from the disk body and extends in the direction of the cam along the axial direction, and the first tooth portion is ring-shaped. On the disc. The caster according to claim 1, wherein the wheel seat is provided with a ring wall, and the ring wall is provided with a Palin, and the pin is inserted into the inner peripheral wall of the Palin. The caster according to claim 1, wherein the brake slider is provided with a brake arc surface, and the curvature of the brake arc surface corresponds to at least one outer circumferential surface of the wheel body, and the brake member is a non-circular cylinder. The caster of claim 3, wherein the brake member is radially provided with a disk body, the at least one card is protruded from the disk body and extends in the direction of the cam along the axial direction, and the first tooth portion is ring-shaped. The wheel body is provided with a ring wall, and the ring wall is provided with a Palin, the pin is inserted into the inner peripheral wall of the Palin; the brake slider is provided with a brake arc surface, and the brake curved surface The curvature corresponds to at least one outer circumference of the wheel body, and the brake member is a non-circular cylinder. The caster of claim 8, wherein the brake member is provided with a stud toward one end of the at least one wheel body, the stud is provided with a ring groove, the brake slider is sleeved on the protruding post, and a fastener is fastened. Fastening the groove of the ring to limit the brake slider between the protrusion and the disk body and the fastener, and the brake slider has a slidable gap with the protrusion, and the brake slider faces the two side plates The two ends are respectively provided with an abutting convex portion, and the two abutting convex portions are respectively abutted between the two side plates.