TWI684538B - Caster - Google Patents

Abstract

A caster includes a main body and a braking mechanism. The main body defines an axial direction and includes a connecting leg and a wheel seat. The wheel seat is axially rotatably connected with the connecting leg and provided with a sliding slot. A wheel body is rotatably connected with the wheel seat. The braking mechanism is disposed on the main body, includes a slidable braking block. The slidable braking block is movable vertically and is movable frontward or backward along the sliding slot.

Description

Caster

The invention relates to a caster with braking and orientation functions.

The caster with brake function, as shown in the patent number CN1989016 in mainland China, is composed of a body and a wheel body pivotally connected to the body. A cam and a central control are provided between the body and the wheel body The iron core set and a brake block are moved down by the central control iron core set to move the brake block down to strongly press the wheel body to achieve the braking function; in addition, the caster as shown in Chinese patent number CN205044427, the wheel body can be A sliding groove opened horizontally in one of the bodies is rotatably slid, the body is provided with a brake block, and a brake pedal is oscillatingly provided on the body, and the mandrel of the wheel body is also slidably disposed in the limit groove of the brake pedal. By controlling the swing of the brake pedal, the limit groove of the brake pedal can slide the limit of the wheel body toward the brake block or away from the brake block.

However, it is known that the brake block of the caster must match the curvature of the wheel body to achieve the function of fully fitting the locked wheel body. The brake surface of the brake block must match the wheel body to make a circular arc shape, and the above-mentioned caster is vertically up and down by the brake block Move, or the wheel body moves horizontally and laterally, so that the wheel body contacts the brake block, and relative movement in such a single direction will cause the wheel body to not be in complete contact with the brake surface, but only with one of the brake surfaces One end is in contact, which will result in poor braking effect and uneven wear of the braking surface. In addition, when the wheel body rolls, the wheel surface will stick to paper scraps, stickers, garbage and other substances, and the wheel body will deform under load. When the brake block moves only slightly, it will cause the lower edge of the brake block to remain in contact with the wheel. Body contact does not completely disengage from the wheel body, which will cause the wheel body to rub against the lower edge of the brake block when it rotates. If it is light, it will cause noise when moving. In severe cases, it will cause the wheel body and the brake block to block and cannot rotate.

The main purpose of the present invention is to provide a caster, the brake block can move up and down along the chute and can move back and forth according to the chute, so that the braking force can be stronger and better, and can be completely detached from the wheel when released.

To achieve the above object, the present invention provides a caster, which includes a body, a brake mechanism and a control component. The body defines an axis, including a pin and a wheel base, the wheel base is pivotally connected to the pin along the axis, and a wheel system is pivotally arranged on the wheel base. The brake mechanism is provided on the body and includes a brake slider and a guide mechanism. The guide mechanism includes at least one first slide groove and at least one limiting member, the at least one first slide groove and the at least one One of the stoppers is provided on the wheel base and the other is provided on the brake slider. The at least one first slide groove is inclined to the axial direction, so that the brake slider can only move along the first The sliding direction of a chute slides. The control assembly includes a cam and a braking member. The cam is radially provided with a first convex portion and a second convex portion. The radial dimension of the first convex portion is greater than the radial dimension of the second convex portion. The cam is provided on the body and can be rotated in a braking position and a release position. The braking member is axially slid on the body and cannot rotate relative to the pin. A first elastic member normally directs the braking member towards the body The direction of the cam snaps. Wherein, when the cam rotates to the braking position, the first convex portion pushes the braking member to a first position, the braking member pushes the braking slider toward the wheel body, and the wheel body cannot Rotation; when the cam rotates to the release position, the second convex portion pushes the brake to a second position, the brake does not push the brake slider toward the wheel body, the wheel body Turnable.

The following merely illustrates the possible implementation forms of the present invention with examples, but it is not intended to limit the scope of the invention to be protected, and will be described first.

Please refer to FIGS. 1 to 8, which show a preferred embodiment of the present invention. The caster of the present invention includes a body 1, a brake mechanism 5 and a control assembly 8.

The body 1 defines an axis, including a pin 2 and a wheel base 3, the wheel base 3 is pivotally connected to the pin 2 along the axis, a wheel body 4 is pivotally mounted on the wheel base 3, the pin 2 It can also be connected to a frame (such as an eagle frame or a cabinet).

The brake mechanism 5 is provided on the body 1 and includes a brake slider 6 and a guide mechanism 7. The guide mechanism 7 includes at least one first sliding groove 71 and at least one limiting member 72, the at least one One of the first sliding groove 71 and the at least one limiting member 72 is disposed on the wheel base 3, and the other is disposed on the brake slider 6. The at least one first sliding groove 71 is diagonal to the axial direction, In this embodiment, two first sliding grooves 71 are provided on the wheel base 3, and one limiting member 72 (in this embodiment, a pin member) is passed through the brake slider 6 to The brake slider 6 can only slide along the extending direction of the first sliding grooves 71. In this embodiment, the brake slider 6 is provided with a brake arc surface 62, the curvature of the brake arc surface 62 corresponds to the outer peripheral surface of the wheel body 4, the wheel base 3 is further provided with two side plates 35, the wheel body 4 The hinge is disposed between the two side plates 35.

The control assembly 8 includes a cam 81 and a braking member 82. The cam 81 is radially provided with a first convex portion 811 and a second convex portion 812. The radial dimension of the first convex portion 811 is larger than the second convex portion The radial dimension of the portion 812, the cam 81 is provided on the body 1 and can rotate in a braking position and a release position, the brake 82 is axially slid on the body 1 and cannot rotate relative to the pin 2, a The first elastic member 31 normally urges the braking member 82 toward the cam 81.

Wherein, when the cam 81 rotates to the braking position (as shown in FIG. 6 ), the first convex portion 811 presses the braking member 82 to a first position, and the braking member 82 is the braking slider 6 When pressing against the wheel body 4, the wheel body 4 cannot rotate; when the cam 81 rotates to the release position (as shown in FIG. 7), the second convex portion 812 presses the braking member 82 to a first position In the two positions, the brake 82 does not push the brake slider 6 toward the wheel body 4 and the wheel body 4 can rotate. Therefore, the brake slider 6 can approach the wheel body 4 obliquely to the axial direction, so that the contact area of the brake slider 6 and the wheel body 4 is larger and the braking force is stronger. In addition, the brake slip When the block 6 is away from the wheel body 4 in an oblique direction to the axial direction, it can ensure that the brake slider 6 completely disengages from the wheel body 4, thus ensuring that the wheel body 4 rolls smoothly and without hindrance. Preferably, the angle between the extending direction of the two first sliding grooves 71 and the axial direction is between 25 degrees and 60 degrees, and in this embodiment, it is 30 degrees.

Further, in this embodiment, the wheel base 3 is provided with a first tooth portion 11, and the braking member 82 is provided with a second tooth portion 821; wherein, when the braking member 82 is located at the first position (as shown in FIG. 6 (Shown), the first tooth portion 11 is in contact with the second tooth portion 821, the pin 2 cannot rotate relative to the wheel base 3 and the wheel body 4 cannot rotate, which can prevent the wheel base 3 from The relative rotation of the pin 2 causes displacement of the rack body and the ground, which can prevent objects placed on the rack body from shaking or even falling; when the stopper 82 is in the second position (as shown in FIG. 7), the The first tooth portion 11 is separated from the second tooth portion 821, the pin 2 can rotate relative to the wheel base 3 and the wheel body 4 can also rotate, so the frame body can be freely moved.

It is worth mentioning that the wheel base 3 is provided with at least one second chute 32, in this embodiment two chute 32, each second chute 32 extends along the axial direction, The second tooth portion 821 is a tooth plate 824, the first tooth portion 11 is slidably disposed on the two second slide grooves 32, and a second elastic member 33 is resiliently disposed on the second slide groove 32 and Between the first tooth portions 11, the first tooth portions 11 are normally pushed against the second tooth portion 821.

Preferably, in this embodiment, the cam 81 may be provided with a third convex portion 813 in a radial direction and can be rotated at a certain position. The radial size of the third convex portion 813 is smaller than that of the second convex portion 812 Radial size, one of the wheel base 3 and the braking member 82 is further provided with at least one groove 34, and the other is provided with at least one insert 822 corresponding to the at least one groove 34, in this embodiment It is the opposite of the groove 34 and the two inserts 822. When the cam 81 rotates to the orientation position (as shown in FIG. 8), the third convex portion 813 presses the stopper 82 to a third Position, the brake 82 does not push the brake slider 6 toward the wheel body 4, and the two inserts 822 are locked against the two grooves 34, the wheel body 4 can rotate and the pin 2 is It cannot be rotated relative to the wheel base 3, so that the frame can be moved linearly without turning.

Specifically, the brake slider 6 is provided with a perforation 61 along the axial direction, and the braking member 82 is further extended with a penetration member 823. The penetration member 823 is limitedly penetrated through the perforation 61 so that the The braking member 82 can slide radially with respect to the braking slider 6 but cannot separate from the braking slider 6 so that the braking slider 6 can slide in the direction of the two first sliding grooves 71.

In detail, in this embodiment, the pin 2 includes a large-diameter section 21 and a small-diameter section 22, the small-diameter section 22 is inserted into the wheel base 3, and the inner peripheral wall of the wheel base 3 has another diameter A flange 36 is provided. The caster further includes a first bearing 37 and a second bearing 38 sleeved on the small-diameter section 22. The radial and axial dimensions of the first bearing 37 are greater than The radial and axial dimensions of the second Palin 38, the outer peripheral wall of the first Palin 37 is radially against the inner peripheral wall of the wheel base 3, and the outer peripheral wall of the second Palin 38 is radially Against the flange 36, the first bearing 37 can be used to bear the weight of the frame, and the second bearing 38 can be used to straighten the small-diameter section 22 to avoid the pin 2 and the wheel base 3 The phase is inclined, and the radial dimension of the second Palin 38 is smaller than the radial dimension of the first Palin 37 to save space in the wheel base 3 and reduce the overall height of the caster. Wherein, the inner peripheral wall of the small-diameter section 22 is a non-circular hole wall, and the shape of the outer peripheral wall of the stopper 82 corresponds to the shape of the inner peripheral wall of the small-diameter section 22, so that the stopper 82 cannot face the Pin 2 rotates.

In summary, in the caster of the present invention, the brake slider can approach the wheel body obliquely to the axial direction, which can make the contact area between the brake slider and the wheel body larger and make the braking force stronger. When the brake slider moves away from the wheel body in an oblique direction to the axial direction, it can ensure that the brake slider completely disengages from the wheel body, thus ensuring that the wheel body rolls smoothly and without hindrance.

1‧‧‧Body 2‧‧‧pin 3‧‧‧wheel seat 4‧‧‧wheel 5‧‧‧Brake mechanism 6‧‧‧brake slider 7‧‧‧Guiding mechanism 8‧‧‧Control components 11‧‧‧The first tooth 21‧‧‧Large diameter section 22‧‧‧small diameter section 31‧‧‧The first elastic piece 32‧‧‧Second Chute 33‧‧‧Second elastic piece 34‧‧‧groove 35‧‧‧Side plate 36‧‧‧Flange 37‧‧‧ First Palin 38‧‧‧ Second Palin 61‧‧‧Perforation 62‧‧‧Brake surface 71‧‧‧The first chute 72‧‧‧Limiting parts 81‧‧‧Cam 82‧‧‧brake parts 811‧‧‧First convex 812‧‧‧The second convex part 813‧‧‧The third convex part 821‧‧‧Second tooth 822‧‧‧plugin 823‧‧‧wearing parts 824‧‧‧Sprocket

FIG. 1 is a perspective view of a preferred embodiment of the present invention. FIG. 2 is an exploded view of a preferred embodiment of the invention. FIG. 3 is a partially enlarged view of a preferred embodiment of the present invention. 4 is another exploded view of a preferred embodiment of the invention. 5 is a side view of a preferred embodiment of the invention. 6 to 8 are operation schematic diagrams of a preferred embodiment of the present invention.

1‧‧‧Body

2‧‧‧pin

33‧‧‧Second elastic piece

35‧‧‧Side plate

3‧‧‧wheel seat

4‧‧‧wheel

32‧‧‧Second Chute

71‧‧‧The first chute

72‧‧‧Limiting parts

Claims (8)

A caster includes: a body defining an axial direction, including a pin and a wheel base, the wheel base is pivotally connected to the pin along the axial direction, a wheel system is pivotally mounted on the wheel base; a brake mechanism is provided on The body includes a brake slider and a guide mechanism, the guide mechanism includes at least one first sliding groove and at least one limiting member, the at least one first sliding groove and the at least one limiting member One is located on the wheel base and the other is located on the brake slider. The at least one first slide groove is inclined to the axial direction, so that the brake slide can only extend along the first slide grooves. Sliding direction; a control assembly, including a cam and a brake, the cam is radially provided with a first convex portion and a second convex portion, the radial dimension of the first convex portion is larger than the diameter of the second convex portion Dimension, the cam is set on the body and can be rotated in a braking position and a release position, the braking member is axially slid on the body and can not rotate relative to the pin, a first elastic member is the braking member Normally snaps in the direction of the cam; wherein, when the cam rotates to the braking position, the first convex portion pushes the braking member to a first position, the braking member moves the braking slider toward the When the wheel body is pressed, the wheel body cannot rotate; when the cam rotates to the release position, the second convex portion presses the brake member to a second position, and the brake member does not move the brake slider toward When the wheel body is pushed against, the wheel body can rotate. The caster according to claim 1, wherein the wheel seat is provided with a first tooth portion, and the braking member is provided with a second tooth portion; wherein, when the braking member is in the first position, the first tooth portion is connected to When the second tooth part is locked, the pin cannot rotate relative to the wheel base; when the brake is in the second position, the first tooth part is separated from the second tooth part, and the pin can be opposite The wheel base rotates. The caster according to claim 1 or 2, wherein the cam is further provided with a third convex portion radially and can be rotated at a certain position, and the radial size of the third convex portion is smaller than that of the second convex portion Size, one of the wheel base and the braking member is provided with at least one groove, and the other is provided with at least one insert corresponding to the at least one groove. When the cam rotates to the orientation position, the first The three convex portions push the braking member to a third position, the braking member does not push the brake slider toward the wheel body, and the at least one insert is stuck against the at least one groove, the wheel body It can be rotated and the pin cannot rotate relative to the wheel base. The caster according to claim 1 or 2, wherein the angle between the extending direction of the at least one first chute and the axial direction is between 25 degrees and 60 degrees. The caster according to claim 1 or 2, wherein the brake slider is provided with a perforation along the axial direction, and the braking member is further extended with a piercing member, and the piercing member is restricted to penetrate the perforation, The braking member can slide radially with respect to the braking slider but cannot be separated from the braking slider. The caster according to claim 1 or 2, wherein the brake slider is provided with a brake arc surface, the curvature of the brake arc surface corresponds to the outer peripheral surface of the wheel body, and the wheel base is further provided with two side plates, the wheel system It is pivotally arranged between the two side plates. The caster according to claim 1 or 2, wherein the pin includes a large-diameter section and a small-diameter section, the small-diameter section is inserted into the wheel base, and the inner peripheral wall of the wheel base is further provided with a radial Flange, the caster further includes a first bearing and a second bearing sleeved on the small diameter section, the radial and axial dimensions of the first bearing are larger than the radial direction of the second bearing In terms of dimensions and axial dimensions, the outer peripheral wall of the first bearing is radially pressed against the inner peripheral wall of the wheel base, and the outer peripheral wall of the second bearing is radially pressed against the flange. The caster according to claim 7, wherein the inner peripheral wall of the small-diameter section is a non-circular hole wall, and the shape of the outer peripheral wall of the stopper corresponds to the shape of the inner peripheral wall of the small-diameter section.

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