Universal wheel with fixing function

Abstract

The utility model discloses a universal wheel with a fixing function, comprising a mounting seat, a rotating part connected to the mounting seat through a bearing, and a rotating wheel. The rotating part is also provided with a support leg that can move up and down; when the support leg moves downward relative to the rotating wheel hanger, the bottom of the support leg is lower than the bottom of the rotating wheel, that is, at this time, the support leg contacts the ground and the rotating wheel is suspended. When the rotating wheel is suspended, the universal wheel will not generate a rotating walking function and self-lock. At the same time, the rotating wheel will no longer bear weight in the self-locking state, which plays a protective role on the rotating wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of universal wheels. Background Art

[0002] The universal wheel in the prior art refers to a bracket installed on the caster wheel that can rotate 360 ​​degrees horizontally under dynamic or static load, and is widely used in logistics, home appliances, mechanical equipment and other fields. Figure 1 The universal wheel shown in the figure has a rotating wheel bracket 2' connected to a mounting seat 1' through a bearing and a rotating wheel 3' mounted on the rotating wheel bracket 2', and is also provided with a self-locking device, which can make the rotating wheel 3' self-locking when it is not necessary to move. The self-locking device includes a brake pad 4' and a wheel brake 5' for operating the brake pad 4' to make frictional contact with the rotating wheel 3'. When the rotating wheel needs to be self-locked, the brake pad 4' can be moved toward the rotating wheel 3' by stepping on the wheel brake 5' until it makes frictional contact with the rotating wheel 3', so that the rotating wheel 3' is self-locked.

[0003] Figure 1 The structure shown in is a common structure of self-locking universal wheels in the prior art. Although the structure is simple and easy to implement, it has the following defects: the friction force for self-locking the rotating wheel is insufficient due to wear of the brake pads or the wheel brake is not locked, which leads to safety risks; and no matter whether the rotating wheel is in a walking state or a self-locking state, the rotating wheel is always in a state of being pressed down. When the universal wheel carries a heavy device, the rotating wheel and the wheel axle between the rotating wheel and the rotating wheel bracket are prone to gradual deformation, resulting in a reduction in service life.

[0004] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0005] In order to solve the problems caused by the prior art, the utility model provides a universal wheel with a fixing function, the purpose of which is to enable the universal wheel to stably self-lock and also to increase the service life of the rotating wheel.

[0006] In order to achieve the above-mentioned purpose, the universal wheel with fixing function of the utility model can adopt the following technical solutions:

[0007] A universal wheel with a fixing function comprises a mounting seat, a rotating part connected to the mounting seat through a bearing, a rotating wheel bracket extending downward from the rotating part, and a rotating wheel mounted on the rotating wheel bracket. The rotating part is also provided with a supporting leg that can move up and down. The supporting leg is arranged side by side with the rotating wheel, the top of the supporting leg is provided with an external thread, and the bottom of the rotating part is provided with an internal thread hole that matches the external thread; when the supporting leg moves downward relative to the rotating wheel bracket, the bottom of the supporting leg is lower than the bottom of the rotating wheel, and when the supporting leg moves upward relative to the rotating wheel bracket, the bottom of the supporting leg is higher than the bottom of the rotating wheel.

[0008] Furthermore, a rotating paddle is fixed on the outer periphery of the supporting leg and surrounds the supporting leg.

[0009] Furthermore, the supporting leg includes a main shaft and a base installed at the bottom of the main shaft, and the base is in a truncated cone shape.

[0010] Furthermore, the rotating wheel bracket extends out a protective ring surrounding the supporting legs.

[0011] Furthermore, the other end of the protection ring is connected to the rotating part through a support column.

[0012] Furthermore, the rotating paddle includes two semicircular parts, which are butt-jointed with each other and fixed on the supporting legs by welding.

[0013] Furthermore, a plurality of gear-shaped protrusions are formed on the periphery of the rotating paddle.

[0014] Beneficial effect: The universal wheel with a fixing function of the utility model is provided with a support leg that can move up and down as a support for the universal wheel when it stops. When the support leg moves downward relative to the rotating wheel hanger, the bottom of the support leg is lower than the bottom of the rotating wheel, that is, the support leg touches the ground and the rotating wheel is suspended in the air. When the rotating wheel is suspended in the air, the universal wheel will not have a rotating walking function and will be self-locking. At the same time, the rotating wheel will no longer bear weight in the self-locking state, which plays a protective role on the rotating wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a universal wheel in the prior art;

[0016] Figure 2 This is a schematic diagram of the structure of the universal wheel in the utility model;

[0017] Figure 3 This is a structural exploded view of the universal wheel in the utility model;

[0018] Figure 4 It is a schematic diagram of the state transition from the universal wheel contacting the ground to the supporting leg contacting the ground in the utility model. DETAILED DESCRIPTION

[0019] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the following specific implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0020] See also Figures 1 to 3 As shown, the utility model discloses a universal wheel with a fixing function, comprising a mounting seat 1, a rotating part 3 connected to the mounting seat 1 through a bearing 2, a rotating wheel bracket 4 extending downward from the rotating part 3, and a rotating wheel 5 mounted on the rotating wheel bracket 4.

[0021] The rotating part 3 is also provided with a support leg 6 that can move up and down, and the support leg 6 is arranged side by side with the rotating wheel 5. The top of the support leg 6 is provided with an external thread, and the bottom of the rotating part 3 is provided with an internal thread hole 31 that matches the external thread. In this embodiment, in order to facilitate the manufacture of the support leg 6, the structure of the support leg 6 is divided into: a main shaft 61, and a base 62 installed at the bottom of the main shaft 61. The base 62 is truncated cone-shaped. The external thread is provided on the top of the main shaft to match the internal thread hole 31, and the bottom of the main shaft is provided with an external thread to connect and fix with the internal thread hole of the base 62. By rotating the support leg 6, the support leg 6 and the rotating part 3 are threadedly matched to make the support leg 6 rise or fall relative to the rotating part 3. In order to facilitate the rotation of the support leg 6, a rotating paddle 7 is also provided around the support leg 6. A number of gear-shaped protrusions 71 are formed on the periphery of the rotating paddle 7 to facilitate manual operation. At the same time, in order to facilitate the manufacture and assembly of the rotating paddle 7, such as Figure 2 As shown, the rotating paddle includes two semicircular parts, which are butted against each other and fixed on the supporting leg 6 by welding.

[0022] At the same time, the rotating wheel bracket 4 extends a protection ring 8 around the support leg 6 for protecting the support leg. The other end of the protection ring 8 is connected to the rotating part 3 through a support column 9.

[0023] When the support leg 6 moves downward relative to the wheel hanger 3, the bottom of the support leg 6 is lower than the bottom of the wheel 5, that is, the support leg 6 is in contact with the ground and the wheel 5 is suspended. Figure 4 As shown, after the support leg 6 contacts the ground, the bottom of the support leg 6 is lower than the bottom of the rotating wheel 5 by a height H. When the rotating wheel 5 is suspended in the air, the rotating wheel 5 will not generate the function of rotating and walking, so that the universal wheel is self-locked. At the same time, the rotating wheel 5 will no longer bear weight in the self-locking state, which plays a protective role for the rotating wheel and the wheel axle, and can extend the life of the rotating wheel. At the same time, in this embodiment, the central axis of the support leg 6 is coaxially arranged with the bearing 2, so that when the support leg 6 contacts the ground and plays a supporting role, the bearing 2 will not bear eccentric force, which can also extend the life of the bearing 2.

Claims

1. A universal wheel with a fixing function, comprising a mounting seat, a rotating part connected to the mounting seat through a bearing, a rotating wheel bracket extending downward from the rotating part, and a rotating wheel mounted on the rotating wheel bracket, characterized in that: The rotating part is also provided with a support leg which can move up and down. The support leg is arranged side by side with the rotating wheel. The top of the support leg is provided with an external thread, and the bottom of the rotating part is provided with an internal thread hole which matches the external thread. When the support leg moves downward relative to the rotating wheel bracket, the bottom of the support leg is lower than the bottom of the rotating wheel. When the support leg moves upward relative to the rotating wheel bracket, the bottom of the support leg is higher than the bottom of the rotating wheel.

2. The universal wheel with fixing function according to claim 1, characterized in that: A rotating paddle is fixed on the outer periphery of the supporting leg and surrounds the supporting leg.

3. The universal wheel with fixing function according to claim 1 or 2, characterized in that: The supporting leg comprises a main shaft and a base installed at the bottom of the main shaft, and the base is in a truncated cone shape.

4. The universal wheel with fixing function according to claim 3, characterized in that: The rotating wheel hanger extends out of a protective ring around the supporting legs.

5. The universal wheel with fixing function according to claim 4, characterized in that: The other end of the protection ring is connected to the rotating part through a supporting column.

6. The universal wheel with fixing function according to claim 2, characterized in that: The rotating paddle comprises two semicircular parts, which are butted against each other and fixed on the supporting legs by welding.

7. The universal wheel with fixing function according to claim 2 or 6, characterized in that: A plurality of gear-shaped protrusions are formed on the periphery of the rotating paddle.

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