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Trundle

A technology of casters and casters, applied in the directions of casters, wheels, clothing, etc., can solve the problems of easy abnormal noise and inflexible steering of casters.

Inactive Publication Date: 2020-03-24
上海善彭实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems in the prior art that the steering of the casters on the suitcase is not flexible enough and prone to abnormal noise, the purpose of the present invention is to provide a caster

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as Figure 1-3 Shown, a kind of caster, comprises wheel base 1, wheel base 2 and tire 3, the top surface of wheel base 1 is used for being fixedly connected with suitcase, and the top surface of caster 2 is connected with the bottom surface of wheel base 1 rotatably, this In the embodiment, the bottom surface of the wheel seat 1 is fixedly provided with fixed wheel nails, and the wheel casters 2 are connected to the fixed wheel nails in rotation; a first protrusion 4, several first protrusions 4 are evenly distributed on the same circumference of the surface of the caster 2, the axis of the circumference where the first protrusion 4 is located coincides with the rotation axis of the caster 2, the first protrusion 4 The surface is a curved surface, and the setting of the first protrusion 4 in the shape of a curved surface can make the caster 2 change from surface contact to line contact with the tire 1 when turning, which can effectively reduce friction and improve ...

Embodiment 2

[0028] The difference between it and the first embodiment is that in order to further reduce friction and abnormal noise, in this embodiment, a circumferential oil groove 6 matching the second protrusion 5 is provided on the side wall of the caster 2 .

[0029] A radial oil groove (not shown in the figure) is provided on the wheel shaft 8 or the wheel core 7 , and the radial oil groove communicates with the rotating surface where the wheel nail 9 and the wheel shaft 8 are in contact with each other.

[0030] The arrangement of the circumferential oil groove 6 and the radial oil groove plays a role of conveniently oiling and lubricating the friction surfaces where the tire 3 and the caster 2 are in contact with each other.

Embodiment 3

[0032] The difference between it and Embodiment 1 or Embodiment 2 is that the rotating shaft 8 is replaced by a bearing sleeve, and the bearing sleeve has an inner hole wall, which can cooperate with the wheel nail 9; in this embodiment, the bearing sleeve is embedded in the wheel core 7 Above; similarly, the bearing sleeve is manufactured using microcellular foaming technology in the injection molding process, which can control the roundness tolerance of the inner hole wall of the bearing sleeve within ±0.02mm and the size tolerance within ±0.02mm; the smaller The tolerance can effectively reduce the beating when the tire 3 rotates, and can effectively reduce friction and abnormal noise.

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Abstract

The invention discloses a trundle. The invention belongs to the field of luggage cases, the wheel comprises a wheel base, a trundle and a tire, the wheel base is fixedly connected with the luggage case, the trundle is rotatably connected with the wheel base, the tire is rotatably connected with the trundle, a plurality of first bulges are arranged on the surface, in contact with the wheel base, ofthe trundle, a plurality of second bulges are arranged on the side wall, in contact with the trundle, of the tire, and the surfaces of the first bulges and second bulges are curved surfaces; a circumferential oil groove matched with the second protrusion is formed in the side wall of the trundle. The luggage case is reasonable in design, convenient to manufacture and capable of effectively reducing friction force between the trundles and the trundle bases and friction force between the tires and the trundles, so that the trundles are more flexible in steering, the luggage case is more labor-saving to drag, and abnormal sounds caused by rotation of the tires are smaller.

Description

technical field [0001] The invention relates to the field of suitcases, in particular to a caster. Background technique [0002] At present, the common casters on the luggage on the market usually include a wheel base, which is fixedly connected with the luggage; a wheel base, which is rotatably connected with the wheel base; on the outside of the tire. [0003] However, with this caster structure, because the caster and the wheel seat are in surface contact, the friction force on the contact surface of the two is relatively large, so that the steering of the caster is not flexible enough; at the same time, the tire will make abnormal noise when rotating, and the abnormal noise is mainly It is caused by the friction between the tire and the axle or the rotating surface of the axle and the caster when the tire rotates; in addition, because the tire and the caster are in surface contact, the frictional resistance on the contact surface is relatively large, causing the suitcas...

Claims

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Application Information

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IPC IPC(8): B60B33/00A45C13/38
CPCA45C13/385B60B33/0002B60B33/0028B60B2200/45
Inventor 林繁斌
Owner 上海善彭实业有限公司