CN103640433B - A kind of castor - Google Patents

Abstract

The invention relates to a caster, which includes a bracket and a wheel, and the wheel is rotatably mounted to the bracket through a wheel shaft. The caster also includes a braking mechanism, which can prevent the wheel from rotating so as to brake the caster; a sliding seat, the sliding seat is arranged on the bracket, and the wheel shaft is rotatable is installed on the sliding seat in a manner; the elastic member cooperates with the sliding seat so that the sliding seat can move up or down under the action of the elastic member; and the selection mechanism, by moving The selection mechanism brakes the caster or releases the caster when the caster is stressed.

Description

a caster

technical field

The present invention relates to a castor, and in particular, to a selectively brakeable castor.

technical background

Casters are used to fit under the equipment to facilitate the movement of the equipment. Casters generally include a wheel and a bracket to which the wheel is pivotally mounted via an axle. The device can be moved on the casters when the wheel rotates on the axle.

Existing casters mainly include three kinds. The first is conventional casters, which are always able to turn to move the equipment regardless of whether there is force on it or not. The second type is casters that brake under force, that is, when the caster is under force, the wheel is locked so that the equipment cannot be moved. When there is no force, the wheel can rotate around the axle so that the equipment can be moved. The third type is casters that are braked when there is no force, that is, when the caster is under force, the wheel can rotate around the axle so that the equipment can be moved, and when there is no force, the wheel is locked so that the equipment cannot be moved.

In the prior art, there is no caster that can combine the functions of the above three casters. Therefore, it is necessary to provide a caster that can be selectively braked.

Contents of the invention

The purpose of the present invention is to provide a caster that can be selectively braked, that is, in different working modes, the caster can be selectively braked under different stress conditions, or whether it is braked or not. force can rotate.

In order to achieve the above object, the caster of the present invention includes a bracket and a wheel, and the wheel is rotatably mounted to the bracket through a wheel shaft. The caster also includes a braking mechanism, which can prevent the wheel from rotating so as to brake the caster; a sliding seat, the sliding seat is arranged on the bracket, and the wheel shaft is rotatable is installed on the sliding seat in a manner; the elastic member cooperates with the sliding seat, so that the sliding seat can move up or down under the action of the elastic member; and the selection mechanism, by moving The selection mechanism brakes the caster or releases the caster when the caster is stressed.

In the present invention, by moving the selection mechanism, the caster can obtain three different modes. In the first mode, the casters can always turn regardless of whether they are under force; The wheels can be moved together until the brake mechanism brakes the castor; in the third mode, the castor is braked by the brake mechanism when there is no force, and by sliding when the force is applied. The seat and elastic, axle and wheel can be moved together until the brake mechanism releases the caster.

In one embodiment, the bracket includes a cavity for accommodating the sliding seat and the selection mechanism, and the elastic member is disposed between a wall of the cavity and the sliding seat. Preferably, the elastic member is a compression spring.

In one embodiment, the brake mechanism includes bracket teeth provided on the bracket and gear teeth provided on the wheel, and the bracket teeth can engage with the gear teeth.

In a preferred embodiment, the bracket teeth include upper bracket teeth and lower bracket teeth; when the sliding seat moves upward together with the wheel shaft, the gear teeth can mesh with the upper bracket teeth, and when the When the sliding seat moves downward together with the wheel shaft, the gear teeth can engage with the teeth of the lower bracket.

In one embodiment, the selection mechanism includes a body and a chute provided on the body, the wheel shaft passes through the chute and can move in the chute, and when the wheel shaft is in the chute When the slots are in different positions, the wheels can be selectively in a braking state under different forces.

In a preferred embodiment, the chute includes a transverse portion and a longitudinal portion arranged at both ends of the transverse portion, and the longitudinal portion extends upward or downward perpendicular to the transverse portion respectively.

In one embodiment, the selection mechanism is constrained inside the bracket by an insert block, so that the selection mechanism can only move laterally.

In one embodiment, the selection mechanism is provided with a handle, and the handle is fixed to the body of the selection mechanism to facilitate the user to push the selection mechanism.

In one embodiment, the caster further includes a bracket cover, and the bracket cover is located above the bracket and connected to the bracket.

Description of drawings

Fig. 1 shows an exploded view of one embodiment of the castor wheel of the present invention.

FIG. 2 shows a perspective view of the bracket of the caster wheel shown in FIG. 1 .

FIG. 3 shows a perspective view of the selection mechanism of the castor shown in FIG. 1 .

Figures 4a-4e respectively show the installation process of the casters of the present invention.

Figures 5a-5c respectively show three different working modes of the caster wheel of the present invention.

detailed description

The structure and other aspects of the caster wheel of the present invention will be further elaborated below in detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows an exploded view of one embodiment of the castor wheel of the present invention. As shown in the figure, the caster wheel of the present invention includes a bracket 10 and a wheel 11 , the wheel 11 is fixedly connected to a wheel shaft 12 , and the wheel shaft 12 and the wheel 11 are further mounted to the bracket 10 in a rotatable manner. In the embodiment shown in FIG. 1 , two wheels 11 are provided which are fixedly connected to both ends of a wheel axle 12 .

As shown in FIG. 2 , the bracket 10 further includes a cavity 101 for accommodating the sliding seat 13 and the selection mechanism 15 of the caster of the present invention. This is described in more detail below.

In a preferred embodiment, the cavity 101 includes a first portion 102 for accommodating the sliding seat 13 and a second portion 103 for accommodating the selection mechanism 15 .

In the present invention, the caster wheel further includes a sliding seat 13 , and the sliding seat 13 is arranged in the first part 102 of the cavity 101 . In the embodiment shown in FIG. 1 , the sliding seat 13 includes a pin body 131 , a shaft hole 132 and a space 133 formed on the sliding seat 13 . When installing the caster, the wheel shaft 12 can pass through the shaft hole 132′, and be mounted on the sliding seat 13′ in a rotatable manner.

As shown in FIGS. 1 and 4 a , the caster wheel of the present invention further includes an elastic member 14 . In a preferred embodiment, the elastic member 14 may be a compression spring 14 , for example. In the embodiment shown in the figure, the compression spring 14 is also arranged in the first part 102 of the cavity 101, between the cavity wall of the first part 102 and the sliding seat 13, so that the compression spring 14 is compressed or the When the compression spring 14 is released, the sliding seat 13 can slide up or down in the first part 102 of the cavity 101 . Preferably, the pin body 131 of the sliding seat 13 is located in the compression spring 14 .

As shown in Figures 1 and 4b, the caster wheel of the present invention further includes a selection mechanism 15, the selection mechanism 15 is arranged in the second part 103 of the cavity 101, and the selection mechanism 15 can be selected in the second part 103 of the cavity 101 move. By moving the selection mechanism 15, the caster can obtain three different working modes, so that it can be braked selectively.

FIG. 3 shows an embodiment of the selection mechanism 15 . In the illustrated embodiment, the selection mechanism 15 includes a body 151 and a chute 152 arranged on the body 151, the wheel shaft 12 can pass through the chute 152 and rotate in the chute 152, and in the installed state, the body 151 is positioned on the sliding seat 13 in the space 133. When the wheel shaft 12 is located in different positions in the chute 152, the caster wheel of the present invention can obtain three different working modes, so that it can be braked selectively.

In a preferred embodiment as shown in FIG. 3 , the chute 152 includes a transverse portion 155 and a longitudinal portion 156 extending downward and an upwardly extending longitudinal portion respectively located at two ends of the transverse portion 155 and substantially perpendicular to the transverse portion 155 157. When the axle 12 is located at the transverse portion 155, the caster can be in an operating mode in which the caster cannot be braked whether it is under force or not. And when the caster is located at the vertical portion 156 or 157, the caster can be braked under the condition of force or no force, which will be described in more detail below.

In a preferred embodiment, the selection mechanism 15 further includes a handle 158 , which is convenient for the user to move the selection mechanism 15 .

As shown in Figures 1 and 4c, the caster wheel of the present invention also includes a braking mechanism, which can prevent the wheel 11 from rotating and thereby brake the caster wheel. In one embodiment, the brake mechanism includes bracket teeth 106 arranged on the bracket 10 and gear teeth 111 arranged on the wheel 11 . When the sliding seat 13 and the wheel shaft 12 move downward or upward, the bracket teeth 106 can engage with the gear teeth 111, thereby preventing the wheel 11 from further rotation, and then braking the caster.

In a preferred embodiment, the bracket teeth 106 include upper bracket teeth 107 and lower bracket teeth 108 , while the gear teeth 111 are composed of a cylinder arranged on the wheel 11 and teeth arranged on the outer surface of the cylinder and distributed around the circumference. The distance between the upper bracket teeth 107 and the lower bracket teeth 108 is greater than the diameter of the circumferential body, thereby ensuring that the sliding seat 13 and the wheel shaft 12 can move up and down.

As shown in Figures 1 and 4d, in a preferred embodiment, the caster of the present invention also includes an insert block 18, the insert block 18 is used to block the opening of the cavity 101, so that the selection mechanism 15 is limited in the cavity 101 and makes The selection mechanism 15 is movable laterally within the cavity 101 . In one embodiment, a dovetail-shaped groove is provided on the insert block 18 , and correspondingly, an insertion portion 109 matching with the groove is arranged on the bracket 10 . Moreover, a notch 182 is provided at the front end 181 of the inserting block 18 , as shown in FIG. 1 , so that the inserting block 18 can be inserted along the inserting portion 109 .

Hereinafter, the installation process of the caster according to an embodiment of the present invention will be described in detail, so as to understand the caster of the present invention more clearly.

Fig. 4a shows the installation process of the sliding seat 13 and the elastic member 14 of the caster of the present invention. In FIG. 4 a , in order to clearly show the installation of the sliding seat 13 and the elastic member 14 , a side wall of the cavity 101 is removed for easy observation. As shown in the figure, the sliding seat 13 is disposed in the first portion 102 of the cavity 101 , and the elastic member 14 (such as a compression spring) is disposed between the bottom wall of the first portion 102 and the sliding seat 13 .

Fig. 4b shows the installation process of the selection mechanism 15 of the caster wheel of the present invention. In Fig. 4b, in order to clearly show the installation of the selection mechanism 15, one side wall of the cavity 101 is removed for easy observation. When installing, the body 151 of the selection mechanism 15 is inserted into the space 133 of the sliding seat 13, and the shaft hole 132 of the sliding seat 13 can be aligned with the chute 152 of the selection mechanism 15, so that the wheel shaft 12 can pass through the bracket 10 in turn. The shaft hole 105 of the sliding seat 13, the shaft hole 132 of the sliding seat 13, and the chute 152 of the selection mechanism 15 are shown in FIG. 4c.

Fig. 4d shows the installation process of the insert 18 of the caster of the present invention. The insertion block 18 can be inserted along the insertion portion 109 of the bracket 10 , so as to fix the insertion block 18 to the bracket 10 , as shown in FIG. 4 e . At this point, the wheel 11 can be mounted on both ends of the axle 12 .

Hereinafter, according to an embodiment of the caster of the present invention, the working mode of the caster of the present invention will be described in detail.

Figure 5a shows a working mode of the caster wheel of the present invention. In this mode of operation, the axle 12 of the castor is in the transverse portion 155 of the channel 152 of the selection mechanism 15 . Due to the limitation of the transverse portion 155, neither the sliding seat 13 nor the wheel shaft 12 can move up and down. At this time, regardless of whether the caster is stressed (such as gravity), the bracket teeth 107 and 108 of the brake mechanism will not engage with the gear teeth 111, so The castors can always be swiveled, which is equivalent to conventional castors.

Fig. 5b shows the second working mode of the caster wheel of the present invention. In this working mode, by moving the selection mechanism 15 , the axle 12 of the castor wheel is placed in the vertical portion 156 of the sliding slot 152 . When the caster is not stressed, the sliding seat 13 and the wheel shaft 12 move down under the restoring force of the compression spring 14 until the gear teeth 111 engage with the lower bracket teeth 108, and the caster is braked this moment. When the caster is stressed (such as gravity), the compression spring 14 is compressed, and the sliding seat 13 and the wheel shaft 12 move upwards in the cavity until the wheel shaft 12 reaches the upper end of the longitudinal portion 156 and is restricted from moving further. The upper bracket teeth 107 mesh with the lower bracket teeth 108, and the caster can be rotated. This is equivalent to the existing castors that are braked when not under force.

Fig. 5c shows the third working mode of the caster of the present invention. In this working mode, by moving the selection mechanism 15 , the axle 12 of the castor wheel is placed in the vertical portion 157 of the sliding slot 152 . When the caster is stressed (such as gravity), the compression spring 14 is compressed, and the sliding seat 13 and the axle 12 move upward in the cavity until the upper bracket teeth 107 of the bracket 10 mesh with the gear teeth 111, and the caster is braked at this moment. When the power applied on the caster is unloaded, the sliding seat 13 and the axle 12 move downwards under the restoring force of the compression spring 14 until the axle 12 reaches the lower end of the longitudinal portion 157 and is restricted from moving further. 111 does not mesh with the upper bracket teeth 107 and the lower bracket teeth 108, the casters can be swiveled. This is equivalent to the existing castors that are braked when stressed.

The above are only preferred embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made to the present invention using this concept also fall within the scope of protection of the present invention.

Claims (8)

1. a castor, it comprises support and wheel, and described wheel is rotatably mounted to described support by wheel shaft, it is characterized in that, described castor also comprises

Stop mechanism, described stop mechanism can stop described wheel rotate thus braked by described castor;

Cliding seat, described cliding seat is set up on the bracket, and described wheel shaft is rotatably mounted on described cliding seat;

Elastic component, described elastic component coordinates with described cliding seat, thus described cliding seat can be moved up or down under the effect of elastic component; And

Selection mechanism, by mobile described selection mechanism, thus brakes described castor or discharges described castor when castor is stressed;

Wherein, described stop mechanism comprises setting bracket teeth on the bracket and is arranged on the described gear teeth of taking turns, described bracket teeth can with described tooth mesh;

Wherein, described bracket teeth comprises upper bracket tooth and lower bracket tooth; When described cliding seat is together with described wheel shaft during upward movement, the described gear teeth can engage with described upper bracket tooth, and when described cliding seat moves downward together with described wheel shaft, the described gear teeth can engage with described lower bracket tooth.

2. castor according to claim 1, is characterized in that, described support comprises the cavity for holding described cliding seat and selection mechanism, and described elastic component is arranged between the wall of described cavity and described cliding seat.

3. castor according to claim 1, is characterized in that, described elastic component is Compress Spring.

4. castor according to claim 1, it is characterized in that, described selection mechanism comprises body and is arranged on the chute on body, described wheel shaft passes described chute and can move in described chute, and when described wheel shaft is in the diverse location of described chute, and brake described castor when castor is stressed or discharge described castor.

5. castor according to claim 4, is characterized in that, described chute comprises lateral part and is arranged on the longitudinal component at two ends of described lateral part, and described longitudinal component extends respectively up or down perpendicular to described lateral part.

6. castor according to claim 4, is characterized in that, described selection mechanism is limited in described internal stent by inserted block, thus makes described selection mechanism can only transverse shifting.

7. castor according to claim 4, is characterized in that, described selection mechanism is provided with handle, so that user promotes described selection mechanism on the body that described handle is fixed to selection mechanism.

8. castor according to claim 1, is characterized in that, described castor also comprises bracket cover, and described bracket cover to be positioned at above described support and to be connected with described support.