Luggage trundle

Abstract

The utility model discloses a luggage trundle which comprises a trundle frame, a rolling wheel and a wheel shaft, the wheel shaft is fixedly connected with the trundle frame, the rolling wheel is provided with a first shaft hole, the rolling wheel is provided with a mounting hole at the first shaft hole, a retainer is arranged in the mounting hole, the retainer is provided with a second shaft hole, and the second shaft hole is communicated with the first shaft hole. The inner diameter of the first shaft hole and the inner diameter of the second shaft hole are larger than the outer diameter of the wheel shaft, the retainer is provided with a plurality of installation grooves, rolling bodies are arranged in the installation grooves and can roll in the installation grooves, the wheel shaft enables the idler wheel and the wheel frame to be connected in a pivoted mode, and the rolling bodies abut against the outer wall of the wheel shaft. According to the trundle, the retainer is arranged on the idler wheel, the rolling body is arranged in the retainer, and the rolling body abuts against the outer wall of the wheel shaft, so that when the trundle rotates, the idler wheel and the wheel shaft keep rolling friction, the trundle rotates smoothly, and the service life of the trundle is prolonged.

Description

Technical Field

[0001] The utility model relates to a luggage caster, in particular to a luggage caster. Background Art

[0002] For the convenience of carrying, the existing common luggage is provided with casters at the bottom. Usually, the rollers of the casters are directly sleeved on the axle. When the caster rotates, sliding friction occurs between the roller axle hole and the axle, resulting in easy wear of the roller axle hole and the axle. After using for a period of time, the caster may not rotate smoothly. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the utility model provides a luggage caster.

[0004] In order to achieve the above object, the technical solution adopted by the utility model is: a luggage caster, including a wheel frame, a roller, and an axle. The axle is fixedly connected to the wheel frame. The roller is provided with a first axle hole, and an installation hole is provided at the first axle hole of the roller. A cage is provided in the installation hole. The cage is provided with a second axle hole. The inner diameters of the first axle hole and the second axle hole are larger than the outer diameter of the axle. The cage is provided with a plurality of installation grooves, and rolling elements are provided in the installation grooves. The rolling elements can roll in the installation grooves. The axle pivotally connects the roller and the wheel frame, and the rolling elements abut against the outer wall of the axle.

[0005] Preferably, the wheel frame is provided with a third axle hole, and the axle and the third axle hole are in interference fit.

[0006] Preferably, an end cap is provided outside the installation hole.

[0007] Preferably, a plurality of protruding portions are provided circumferentially on the cage, and the protruding portions and the installation hole are in interference fit.

[0008] Preferably, a recessed portion is provided between the protruding portion and the main body of the cage.

[0009] Preferably, the cage and the rolling elements are made of plastic.

[0010] Preferably, a dust cover is provided on the side of the roller.

[0011] Preferably, there are 2 rollers, which are arranged on both sides of the wheel frame.

[0012] Preferably, the wheel frame is provided with 2 wing plates, and the rollers are arranged between the wing plates.

[0013] Preferably, one end of the axle is provided with a boss, the other end is provided with a groove, and a retaining ring is provided on the groove.

[0014] Advantages of the present utility model: By providing a cage on the roller, with rolling elements arranged in the cage and the rolling elements abutting against the outer wall of the axle, when the casters rotate, the roller and the axle maintain rolling friction, ensuring smooth rotation of the casters and extending the service life of the casters. Description of the Drawings

[0015] Figure 1 Schematic structural diagram of the first embodiment of the present utility model;

[0016] Figure 2 Front view of the first embodiment of the present utility model;

[0017] Figure 3 For Figure 2 Cross-sectional view in the B-B direction in

[0018] Figure 4 For Figure 3 Cross-sectional view in the C-C direction in

[0019] Figure 5 Exploded schematic diagram of the first embodiment of the present utility model;

[0020] Figure 6 Schematic structural diagram of the cage of the present utility model;

[0021] Figure 7 Schematic structural diagram of the second embodiment of the present utility model;

[0022] Figure 8 Cross-sectional view of the second embodiment of the present utility model;

[0023] Figure 9 Exploded schematic diagram of the second embodiment of the present utility model. Detailed Description of the Embodiments

[0024] As Figures 1-6 shown, a luggage caster of the first embodiment of the present utility model includes a wheel frame 1, a roller 2, and an axle 3. The axle 3 is fixedly connected to the wheel frame 1. The roller 2 is provided with a first shaft hole 201, and an installation hole 202 is provided at the first shaft hole 201 of the roller 2. A cage 4 is arranged in the installation hole 202. The cage 4 is provided with a second shaft hole 401. The inner diameters of the first shaft hole 201 and the second shaft hole 401 are larger than the outer diameter of the axle 3. The cage 4 is provided with a plurality of installation grooves 402. Rolling elements 5 are arranged in the installation grooves 402 and can roll in the installation grooves 402. The axle 3 pivotally connects the roller 2 and the wheel frame 1, and the rolling elements 5 abut against the outer wall of the axle 3. In this embodiment, the rolling elements 5 are cylindrical rollers, and a mudguard 102 is arranged on the wheel frame 1.

[0025] The wheel carrier 1 is provided with a third shaft hole 101, and the wheel shaft 3 and the third shaft hole 101 are in interference fit.

[0026] A end cover 6 is arranged outside the mounting hole 202. In this embodiment, a convex block 601 is arranged on the outer wall of the end cover 6, and the end cover 6 and the mounting hole 202 are in interference fit through the convex block 601. The connection modes between the wheel shaft 3 and the wheel carrier 1, and between the end cover 6 and the mounting hole 202 can also adopt other conventional fixing modes in the prior art.

[0027] A plurality of convex portions 403 are circumferentially arranged on the cage 4, and the convex portions 403 and the mounting hole 202 are in interference fit. A retreat portion 404 is arranged between the convex portion 403 and the main body of the cage 4. The arrangement of the retreat portion 404 enables the convex portion 403 to be appropriately deformed radially inwards, facilitating the disassembly and assembly of the cage 4.

[0028] The cage 4 and the rolling elements 5 are made of plastic. The plastic material has a lower cost compared with metal and is more suitable for large-scale production.

[0029] A dust-proof cover 7 is arranged on the side surface of the roller 2. In this embodiment, a buckle is arranged on the inner side of the dust-proof cover 7, the roller 2 is provided with a corresponding bayonet, and the dust-proof cover 7 and the roller 2 are connected through the buckle. The dust-proof cover 7 prevents solid and liquid impurities from entering from the side surface of the roller 2, preventing the wheel shaft 3 from being worn or corroded due to impurities.

[0030] There are 2 rollers 2, which are arranged on both sides of the wheel carrier 1. A boss 301 is arranged at one end of the wheel shaft 3, a groove 302 is arranged at the other end, and a retaining ring 8 is arranged on the groove 302. Axial positioning of the wheel shaft 3 and the rollers 2 on both sides is achieved through the boss 301 and the retaining ring 8. Of course, in addition to the above method, other conventional positioning methods in the prior art can also be adopted.

[0031] As Figures 7-9 shown, it is the second embodiment of the present utility model. Different from the first embodiment, the wheel carrier 1 is provided with 2 wing plates 103, the rollers 2 are arranged between the wing plates 103, and a dust-proof cover plate 9 is arranged on the outer side surface of the wing plates 103.

[0032] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, simple modifications and substitutions by those of ordinary skill in the art are within the protection scope of the present utility model.

Claims

1. A luggage caster, comprising a wheel frame, a roller, and a wheel axle, characterized in that: The wheel axle and the wheel frame are fixedly connected, the roller is provided with a first axial hole, the roller is provided with a mounting hole at the first axial hole, a retaining frame is provided in the mounting hole, the retaining frame is provided with a second axial hole, the inner diameters of the first axial hole and the second axial hole are larger than the outer diameter of the wheel axle, the retaining frame is provided with a plurality of mounting grooves, the mounting grooves are provided with rolling bodies, the rolling bodies can roll in the mounting grooves, the wheel axle pivotally connects the roller and the wheel frame, and the rolling bodies abut against the outer wall of the wheel axle.

2. A luggage caster as claimed in claim 1, characterized in that: The wheel frame is provided with a third axial hole, and the wheel axle and the third axial hole are interference fit.

3. The luggage caster according to claim 1, characterized in that: An end cover is arranged outside the mounting hole.

4. The luggage caster according to claim 1, characterized in that: The retaining frame is provided with a plurality of protrusions in the circumferential direction, and the protrusions are interference-fitted with the mounting holes.

5. A luggage caster as claimed in claim 4, characterized in that: A retreat portion is provided between the protruding portion and the retaining frame body.

6. The luggage caster according to claim 1, characterized in that: The retaining frame and rolling element are made of plastic.

7. The luggage caster according to claim 1, characterized in that: A dust cover is provided on the side of the roller.

8. The luggage caster according to claim 1, characterized in that: There are two rollers, which are arranged on both sides of the wheel frame.

9. The luggage caster according to claim 1, characterized in that: The wheel frame is provided with two wing plates, and the roller is arranged between the wing plates.

10. A luggage caster according to claim 8 or 9, characterized in that: One end of the wheel shaft is provided with a boss, the other end is provided with a groove, and a retaining ring is provided on the groove.

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