TWI603862B - Caster - Google Patents

Description

Casters

The present invention relates to a caster having a brake and directional function.

According to the caster, which generally has a brake function, basically consists of a body and a wheel body pivotally connected to the body. A cam, a central control core group and a brake block are arranged between the body and the wheel body. The central control core group moves down and moves down the brake block to strongly press the wheel body to achieve the brake function.

However, the brake block of the conventional caster must match the curvature of the wheel body to achieve the function of completely sealing the dead wheel body. The brake block must be matched with the wheel body to make a circular arc shape. When the wheel body rolls, the wheel surface will stick to the paper scraps. Stickers and garbage, etc., and the wheel body will be deformed under load. When the brake block is only slightly moved up, the lower edge of the brake block will still contact the wheel body and not completely off the wheel body, which will cause the wheel body to rotate. Rubbing to the lower edge of the brake block, the lighter causes noise when moving, and in severe cases, the wheel body and the brake block can not be rotated.

The main object of the present invention is to provide a caster that 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 the vehicle can be completely separated from the wheel when released.

To achieve the above object, the present invention provides a caster comprising a body, a brake mechanism and a control assembly. The body defines an axial direction, including a pin and a wheel seat along which the wheel seat To the pivoting of the pin, a wheel system is pivoted to the wheel base. The brake mechanism is disposed on the body, and includes a brake slider and a guiding mechanism, the guiding mechanism includes at least one first sliding slot and at least one limiting member, the at least one first sliding slot and the at least one matching slot One of the limiting members is disposed on the wheel base, and the other is disposed on the brake slider, the at least one first sliding slot is oblique to the axial direction, so that the brake slider can only follow the first The sliding direction of a chute slides. The control assembly includes a cam and a brake member. The cam has a first protrusion and a second protrusion. The radial dimension of the first protrusion is greater than the radial dimension of the second protrusion. The cam is disposed on the body and is rotatable in a braking position and a releasing position, the braking member is axially slidably disposed on the body and cannot rotate relative to the pin, and a first elastic member is configured to face the braking member normally The direction of the cam is bounced. Wherein, when the cam rotates to the braking position, the first convex portion abuts the braking member to a first position, and the braking member abuts the braking slider toward the wheel body, and the wheel body cannot Rotating; when the cam is rotated to the release position, the second protrusion abuts the brake member to a second position, and the brake member does not push the brake slider toward the wheel body, and the wheel body is It can be rotated.

1‧‧‧ Ontology

2‧‧‧ pins

3‧‧·wheel seat

4‧‧‧ wheel body

5‧‧‧ brake mechanism

6‧‧‧煞Car Slider

7‧‧‧Guiding agency

8‧‧‧Control components

11‧‧‧First tooth

21‧‧‧ Large diameter section

22‧‧‧Small path

31‧‧‧First elastic parts

32‧‧‧Second chute

33‧‧‧Second elastic parts

34‧‧‧ Groove

35‧‧‧ side panels

36‧‧‧Flange

37‧‧‧First Palin

38‧‧‧Second Palin

61‧‧‧Perforation

62‧‧‧煞车弧面

71‧‧‧First chute

72‧‧‧Limited parts

81‧‧‧ cam

82‧‧‧Brakes

811‧‧‧First convex

812‧‧‧second convex

813‧‧‧3rd convex

821‧‧‧second tooth

822‧‧‧plugin

823‧‧‧ wearing parts

824‧‧‧ toothed disc

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 enlarged view of a preferred embodiment of the present invention.

4 is another exploded view of a preferred embodiment of the present invention.

Figure 5 is a side elevational view of a preferred embodiment of the present invention.

6 to 8 are schematic views showing the operation 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 Figures 1 through 8, there is shown 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 axial direction, and includes a pin 2 and a wheel base 3. The wheel base 3 is pivotally connected to the pin 2 along the axial direction. A wheel body 4 is pivotally mounted on the wheel base 3, and the pin 2 is Can be additionally connected to a body (such as a scaffold or cabinet).

The brake mechanism 5 is disposed on the body 1 and includes a brake slider 6 and a guiding mechanism 7. The guiding mechanism 7 includes at least one first sliding slot 71 and at least one limiting member 72. The at least one One of the first sliding slot 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 slot 71 is oblique to the axial direction. In the present embodiment, the first sliding slot 71 is disposed on the wheel base 3, and the limiting member 72 (in this embodiment, a pin member) is disposed on the brake slider 6 to The brake slider 6 is slidable only in the direction in which the first sliding grooves 71 extend. In this embodiment, the brake slider 6 is provided with a braking arc surface 62. The curvature of the braking surface 62 corresponds to the outer circumferential surface of the wheel body 4. The wheel housing 3 further extends with two side plates 35. The wheel body 4 is further provided. The system is pivotally disposed between the two side plates 35.

The control unit 8 includes a cam 81 and a brake member 82. The cam 81 is radially provided with a first protrusion 811 and a second protrusion 812. The first protrusion 811 has a radial dimension larger than the second protrusion. The radial direction of the portion 812, the cam 81 is disposed on the body 1 and is rotatable in a braking position and a releasing position, the braking member 82 is axially slidably disposed on the body 1 and cannot be rotated relative to the pin 2, The first elastic member 31 is normally biased toward the cam 81 in the direction of the cam 81. In detail, in the embodiment, the two ends of the first elastic member 31 are respectively abutted against the pin 2 and Between the brake members 82 (as shown in FIG. 5), the brake member 82 is elastically biased toward the cam 81 by the first elastic member, so that the brake member 82 and the cam 81 are continuously pressed against each other. Therefore, the first convex portion 811 or the second convex portion 812 and the braking member 82 are rotated by rotating the cam 81. To the top, the brake member 82 can be controlled to slide in the pin 2 to adjust the position of the brake member 82 relative to the pin.

Wherein, when the cam 81 is rotated to the braking position (as shown in FIG. 6), the first convex portion 811 abuts the braking member 82 to a first position, and the braking member 82 is the braking slider 6 When the wheel body 4 is abutted against the wheel body 4, the wheel body 4 cannot be rotated; when the cam 81 is rotated to the release position (as shown in FIG. 7), the second convex portion 812 abuts the braking member 82 to the first In the two positions, the brake member 82 does not push the brake slider 6 toward the wheel body 4, and the wheel body 4 can be rotated. Therefore, the brake slider 6 can be inclined to the wheel body 4 obliquely to the axial direction, so that the contact area between the brake slider 6 and the wheel body 4 is larger, and the brake force is stronger, and the brake pedal is further slid. When the block 6 is away from the wheel body 4 obliquely to the axial direction, it is ensured that the brake slider 6 is completely separated from the wheel body 4, so that the wheel body 4 can be smoothly and unimpededly rolled. Preferably, the angle between the extending direction of the two first chutes 71 and the direction of the axial direction is between 25 degrees and 60 degrees, which is 30 degrees in this embodiment.

Further, in the embodiment, the wheel base 3 is provided with a first tooth portion 11, and the brake member 82 is provided with a second tooth portion 821; wherein when the brake member 82 is located at the first position (FIG. 6) The first tooth portion 11 is in contact with the second tooth portion 821. The pin 2 cannot be rotated relative to the wheel base 3 and the wheel body 4 cannot be rotated, so that the wheel base 3 can be avoided. The relative rotation of the pin 2 causes displacement of the frame body and the ground to prevent the article placed on the frame body from being shaken or even dropped; when the brake member 82 is located in the second position (as shown in FIG. 7), The first tooth portion 11 is disengaged from the second tooth portion 821, and the pin 2 is rotatable relative to the wheel base 3 and the wheel body 4 is also rotatable, so that the frame body can be freely moved.

It is to be noted that the wheel base 3 is provided with at least one second sliding slot 32. In this embodiment, the second sliding slot 32 is disposed, and each of the second sliding slots 32 extends along the axial direction. The second tooth portion 821 is a toothed disc 824. The first tooth portion 11 is slidably disposed on the second second sliding slot 32. A second elastic member 33 is elastically disposed on the second sliding slot 32. Between the first tooth portions 11 to normalize the first tooth portion 11 toward the second tooth portion The direction of the portion 821 is pushed so that the first tooth portion 11 can be normally engaged with the second tooth portion 821 (as shown in FIG. 6), and the pin 2 cannot be rotated relative to the wheel base 3.

Preferably, in the embodiment, the cam 81 is further provided with a third convex portion 813 and is rotatable in a certain position. The radial dimension of the third convex portion 813 is smaller than the second convex portion 812. In the radial dimension, the wheel base 3 and the brake member 82 are 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. The two recesses 34 and the insert 822 are opposite to each other. When the cam 81 is rotated to the orientation position (as shown in FIG. 8), the third protrusion 813 abuts the brake member 82 to a third position. In position, the brake member 82 does not push the brake slider 6 toward the wheel body 4, and the two inserts 822 are engaged with the two grooves 34, and the wheel body 4 can be rotated and the pin 2 is It is impossible to rotate relative to the wheel base 3, and the frame can be moved linearly without turning.

Specifically, the brake slider 6 is disposed with a through hole 61 in the axial direction, and the fastener member 82 is further disposed with a through hole 823. The through hole 631 is disposed in the through hole 61. The brake member 82 is slidable relative to the brake slider 6 but cannot be disengaged from the brake slider 6 so that the brake slider 6 can slide in the direction of the two first sliding slots 71.

In detail, in the embodiment, the pin 2 includes a large diameter section 21 and a small diameter section 22, and the small diameter section 22 is inserted into the wheel base 3, and the inner circumference wall of the wheel base 3 has a diameter. A flange 36 is provided, the caster further includes a first Palin 37 and a second Palin 38 disposed on the small diameter section 22, and the radial dimension and the axial dimension of the first Palin 37 are greater than The radial dimension and the axial dimension of the second Palin 38, the outer peripheral wall of the first Palin 37 is radially abutted against the inner peripheral wall of the wheel seat 3, and the outer wall of the second Palin 38 is radially Abutting the flange 36, the first Palin 37 can be used to support the weight of the frame body, and the second Palin 38 is used to correct 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 seat 3 to reduce the overall height of the caster. 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 braking member 82 corresponds to the shape of the inner peripheral wall of the small diameter section 22, so that the braking member 82 cannot be opposite to the Pin 2 rotates.

In summary, in the caster of the present invention, the brake slider can be inclined to the wheel body in the direction of the axial direction, so that the contact area between the brake slider and the wheel body is larger, and the brake force is stronger. When the brake slider is away from the wheel body obliquely to the axial direction, the brake slider can be completely separated from the wheel body, thereby ensuring smooth and unimpeded rolling of the wheel body.

1‧‧‧ Ontology

2‧‧‧ pins

33‧‧‧Second elastic parts

35‧‧‧ side panels

3‧‧·wheel seat

4‧‧‧ wheel body

32‧‧‧Second chute

71‧‧‧First chute

72‧‧‧Limited parts

Claims (7)

A caster includes: a body defining an axial direction, comprising a pin and a wheel seat, the wheel seat pivotally connected to the pin along the axial direction, a wheel system is pivoted on the wheel seat; a brake mechanism is disposed on the wheel The body includes a brake slider and a guiding mechanism, and the guiding mechanism includes at least one first sliding slot and at least one limiting component, the at least one first sliding slot and the at least one limiting component. One is disposed on the wheel base, and the other is disposed on the brake slider, the at least one first chute is oblique to the axial direction, so that the brake slider can only extend along the first sliding slots Sliding direction; a control component comprising a cam and a brake member, wherein the cam is radially provided with a first convex portion and a second convex portion, and the radial dimension of the first convex portion is larger than the diameter of the second convex portion In the dimension, the cam is disposed on the body and is rotatable in a braking position and a releasing position, the braking member is axially slidably disposed on the body and cannot rotate relative to the pin, and a first elastic member is the braking member Normally snapping in the direction of the cam; wherein, when the cam is rotated to the braking position, The first protrusion abuts the brake member to a first position, the brake member abuts the brake slider toward the wheel body, and the wheel body cannot rotate; when the cam rotates to the release position, the The second protrusion abuts the brake member to a second position, and the brake member does not push the brake slider toward the wheel body, and the wheel body can rotate; wherein the wheel seat is provided with a first tooth portion The brake member is provided with a second tooth portion; wherein, when the brake member is in the first position, the first tooth portion is engaged with the second tooth portion, and the pin cannot be rotated relative to the wheel seat When the brake member is in the second position, the first tooth portion is disengaged from the second tooth portion, and the pin is rotatable relative to the wheel seat; wherein the wheel seat is provided with at least one second chute, each The second chute extends along the axial direction, the second tooth portion is a toothed disc, the first tooth portion is slidably disposed on the at least one second chute, and the second elastic member is elastically biased. Between the second chute and the first tooth portion, the first tooth portion is normally pushed in the direction of the second tooth portion. The caster of claim 1, wherein the cam is further provided with a third convex portion and is rotatable in a certain position, the radial dimension of the third convex portion being smaller than the radial dimension of the second convex portion. The wheel base and the brake member are further provided with at least one groove, and the other is further provided with at least one insert corresponding to the at least one groove. When the cam is rotated to the orientation position, the third protrusion Abutting the brake member to a third position, the brake member does not push the brake slider toward the wheel body, and the at least one insert card is engaged with the at least one groove, and the wheel body can be Rotate and the pin cannot rotate relative to the wheel base. The caster of claim 1, wherein an angle between the extending direction of the at least one first chute and the direction of the axial direction is between 25 degrees and 60 degrees. The caster of claim 1, wherein the brake slider is provided with a through hole along the axial direction, and the brake member further has a through hole extending through the through hole. The brake member is slidable relative to the brake slider but cannot be disengaged from the brake slider. 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 the outer circumferential surface of the wheel body, and the wheel base further extends with two side plates, and the wheel system is pivoted. Between the two side panels. The caster of claim 1, 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 flange The caster further includes a first Palin and a second Palin disposed in the small diameter section, wherein the radial dimension and the axial dimension of the first Palin are greater than the radial dimension of the second Palin and In the axial dimension, the outer peripheral wall of the first Palin is radially abutted against the inner peripheral wall of the wheel seat, and the outer peripheral wall of the second Palin is radially abutted against the flange. The caster according to claim 6, wherein the inner peripheral wall of the small diameter section is a non-circular hole wall, and the outer peripheral wall of the brake member has a shape corresponding to the shape of the inner peripheral wall of the small diameter section.