CN219487076U

CN219487076U - Caster of low-noise trolley made of polyurethane material

Info

Publication number: CN219487076U
Application number: CN202320811653.2U
Authority: CN
Inventors: 陈辉; 杨群; 王淑燕; 包伟江; 张国斌
Original assignee: Ningbo Jinsui Rubber And Plastic Co ltd
Current assignee: Ningbo Jinsui Rubber And Plastic Co ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-08
Anticipated expiration: 2033-04-12

Abstract

The utility model provides a truckle of low noise shallow of polyurethane material, includes wheel hub and the wheel body of cover on wheel hub, its characterized in that: the wheel body is of an annular structure with a closed surface and made of TPU materials, a cavity for increasing elasticity of the wheel body is distributed in the wheel body, a ring body for cavity forming is arranged on the inner wall of the cavity, and the ring body can deform along with deformation of the wheel body. The utility model has the advantages that: the TPU material has good corrosion resistance, the shape of the surface of the wheel after being manufactured into the wheel is kept good, the wheel can smoothly roll over the indoor ground, the occurrence probability of abnormal sound is reduced, and the noise generated when the caster rotates is reduced; the manufactured wheel body is wear-resistant and corrosion-resistant, has an annular structure with a closed surface, can prevent particles from being embedded into the wheel body, and is very convenient to clean; the cavity is formed in the wheel body, the cavity can assist the wheel body to deform when the wheel body is extruded outside, the elasticity of the wheel body is increased, jolt is reduced, and the use is more comfortable.

Description

Caster of low-noise trolley made of polyurethane material

Technical Field

The utility model relates to the technical field of wheel manufacturing, in particular to a trundle of a low-noise cart made of polyurethane materials.

Background

TPU is one type of polyurethane, TPU is a type of thermoplastic polyurethane elastomer rubber, and is a type of elastomer that can be plasticized by heating and dissolved in a solvent. The polyester type and polyether type are mainly classified into a white irregular spherical or columnar particle. The polyurethane thermoplastic elastomer has the characteristics of excellent wear resistance, excellent ozone resistance, high hardness, high strength, good elasticity, low temperature resistance, good oil resistance, chemical resistance and environmental resistance, and the polyether hydrolysis stability in a humid environment is far higher than that of a polyester type. These good properties have led to the widespread use of thermoplastic polyurethanes in many fields of footwear, cables, clothing, automobiles, medical hygiene, tubing, films and sheets. TPU is recognized as a novel polymer material with environmental protection and excellent performance, and has become one of the fastest growing thermoplastic materials.

The existing shared bicycle and shared electric vehicle often adopt a wheel structure without inflation for maintenance convenience. The rubber wheel lacks elasticity when riding, is relatively bumpy and has an unsatisfactory use effect. In order to solve the problem, the improvement method is that round through holes are distributed on the tread of the wheel, the round through holes axially penetrate through the side wall of the wheel, the elasticity of the wheel when encountering obstacles is increased through the round through holes, and jolt is reduced. However, the improved wheel is easy to embed particles and be stained with dust, and can make sounds when rolling on the epoxy resin ground, so that the use effect is not ideal, and the structure of the improved wheel is further improved.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the low-noise trolley castor made of the polyurethane material, which has the advantages of low noise, wear resistance, corrosion resistance and convenient cleaning when rolling on the indoor ground.

The technical scheme adopted for solving the technical problems is as follows: the truckle of this low noise shallow of polyurethane material, including wheel hub and cover at wheel hub's wheel body, its characterized in that: the wheel body is of an annular structure with a closed surface and made of TPU materials, a cavity for increasing elasticity of the wheel body is distributed in the wheel body, a ring body for cavity forming is arranged on the inner wall of the cavity, and the ring body can deform along with deformation of the wheel body.

As a modification, the ring body may preferably be made of iron sheet.

Further improved, the front projection of the ring body can be preferably arc-shaped.

As a modification, the front projection of the cavity may preferably be a kidney-shaped hole, and the side wall of the kidney-shaped hole is curved to the outer edge side of the wheel body.

Further, the number of the cavities is preferably six, and the six cavities are equally spaced on the same circumference of the wheel body.

Further improvements may be made in that the sum of the areas of the connecting ribs between the cavities may preferably be less than one eighth of the sum of the areas of the cavities.

As an improvement, a connecting groove can be preferably provided on the outer wheel surface of the wheel hub, and the inner wall of the wheel body is connected in a embedding manner in the connecting groove.

In a further development, annular blocking pieces can be preferably arranged on both sides of the connecting groove, respectively, and the wheel body is clamped between the two blocking pieces.

Further improved, the hub can preferably comprise an outer ring and an inner ring, and weight-reducing through holes are distributed between the outer ring and the inner ring.

Further, a ball bearing capable of reducing rolling noise may be preferably provided in the middle of the inner race.

Compared with the prior art, the utility model has the advantages that: the TPU material has good corrosion resistance, the shape of the surface of the wheel after being manufactured into the wheel is kept good, the wheel can smoothly roll over the indoor ground, the occurrence probability of abnormal sound is reduced, and the noise generated when the caster rotates is reduced; the manufactured wheel body is wear-resistant and corrosion-resistant, has an annular structure with a closed surface, can prevent particles from being embedded into the wheel body, and is very convenient to clean; the cavity is formed in the wheel body, the cavity can assist the wheel body to deform when the wheel body is extruded outside, the elasticity of the wheel body is increased, jolt is reduced, and the use is more comfortable.

Drawings

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is a top view of the wheel of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an exploded view of the structure of FIG. 1;

FIG. 5 is an exploded view of the wheel of FIG. 4;

fig. 6 is an enlarged view of the portion I in fig. 3.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 6, the caster of the low noise cart made of polyurethane material of this embodiment includes a hub and a wheel body 1 sleeved on the hub, the wheel body 1 is a ring structure made of TPU material and having a closed surface, cavities 11 for increasing the elasticity of the wheel body are distributed in the wheel body 1, and ring bodies 12 for forming the cavities are disposed on the inner walls of the cavities 11, and the ring bodies 12 can deform along with the deformation of the wheel body.

The ring body 12 is made of iron sheet. The front projection of the ring body 12 is arc-shaped. The front projection of the cavity 11 is a kidney-shaped hole, and the side wall of the kidney-shaped hole is bent to one side of the outer edge of the wheel body. Six cavities 11 are arranged and are equally spaced on the same circumference of the wheel body 1. The sum of the areas of the connecting ribs 13 between the cavities is less than one eighth of the sum of the areas of the cavities 11.

A connecting groove 21 is arranged on the outer wheel surface of the wheel hub, and the inner wall of the wheel body 1 is embedded and connected in the connecting groove 21. Annular blocking pieces 22 are respectively arranged on two sides of the connecting groove 21, and the wheel body 1 is clamped between the two blocking pieces 22. The hub comprises an outer ring 20 and an inner ring 2, and weight-reducing through holes 23 are distributed between the outer ring 20 and the inner ring 2. A ball bearing 24 capable of reducing rolling noise is provided in the middle of the inner race 2.

Claims

1. The utility model provides a truckle of low noise shallow of polyurethane material, includes wheel hub and cover wheel body (1) on wheel hub, its characterized in that: the wheel body (1) is of a ring-shaped structure with a closed surface and made of TPU materials, cavities (11) for increasing elasticity of the wheel body are distributed in the wheel body (1), ring bodies (12) for forming the cavities are arranged on the inner walls of the cavities (11), and the ring bodies (12) can deform along with deformation of the wheel body.

2. The caster according to claim 1, wherein: the ring body (12) is made of iron sheets.

3. The caster according to claim 2, wherein: the front projection of the ring body (12) is arc-shaped.

4. A castor according to any one of claims 1 to 3, wherein: the front projection of the cavity (11) is a kidney-shaped hole, and the side wall of the kidney-shaped hole is bent to one side of the outer edge of the wheel body.

5. The caster according to claim 4, wherein: six cavities (11) are arranged and are distributed on the same circumference of the wheel body (1) at equal intervals.

6. The caster according to claim 5, wherein: the sum of the areas of the connecting ribs (13) between the cavities is less than one eighth of the sum of the areas of the cavities (11).

7. A castor according to any one of claims 1 to 3, wherein: the outer wheel surface of the wheel hub is provided with a connecting groove (21), and the inner wall of the wheel body (1) is embedded and connected in the connecting groove (21).

8. The caster according to claim 7, wherein: annular baffle plates (22) are respectively arranged on two sides of the connecting groove (21), and the wheel body (1) is clamped between the two baffle plates (22).

9. The caster according to claim 8, wherein: the hub comprises an outer ring (20) and an inner ring (2), and weight-reducing through holes (23) are distributed between the outer ring (20) and the inner ring (2).

10. The caster according to claim 9, wherein: a ball bearing (24) capable of reducing rolling noise is arranged in the middle of the inner ring (2).