Wear-resistant trundle

Abstract

The utility model discloses a wear-resisting trundle which comprises a chassis, a damping frame, a trundle support and a trundle body, the damping frame comprises a damping plate, a guide column and a damping spring, the guide column and the damping spring are arranged between the damping plate and the chassis, and the trundle support is installed on the damping plate; the trundle body is rotationally installed on the trundle support, the trundle body comprises a framework, an inner core, a damping layer and a wear-resistant layer, the damping layer is composed of an inflation pipe wound on the inner core, and the wear-resistant layer is arranged on the outer side of the damping layer. The damping frame is arranged between the trundle support and the chassis, and the damping spring is used for improving the buffering and damping capacity of the trundle; the inflation rubber pipe is wound outside the inner core of the trundle body, and the inflation rubber pipe is elastic and can relieve pressure borne by the abrasion-resistant layer and reduce extrusion force between the abrasion-resistant layer and the ground, so that friction borne by the abrasion-resistant layer is reduced, and abrasion resistance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a wear-resistant caster. Background Art

[0002] Casters include movable casters and fixed casters. Movable casters, also called universal wheels, have a structure that allows 360-degree rotation; fixed casters, also called fixed casters, have no rotating structure and cannot turn. Generally, two fixed wheels and two universal wheels are set on a trolley, which are used together to facilitate the movement of the trolley. Casters will produce relatively large wear after long-term use. Generally, casters are also equipped with a simple shock-absorbing structure. Long-term use will reduce the shock-absorbing effect, thereby affecting the service life of the casters. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a wear-resistant caster, which can extend the service life of the caster.

[0004] To this end, the technical solution of the utility model is: a wear-resistant caster, comprising a chassis, a shock-absorbing frame, a caster bracket and a caster body, the shock-absorbing frame comprising a shock-absorbing plate, a guide column and a shock-absorbing spring, the guide column and the shock-absorbing spring are arranged between the shock-absorbing plate and the chassis, and the caster bracket is installed on the shock-absorbing plate; the caster body is rotatably installed on the caster bracket, the caster body comprises a skeleton, an inner core, a shock-absorbing layer and a wear-resistant layer, the shock-absorbing layer is composed of an inflatable tube wound around the inner core, and the wear-resistant layer is placed on the outside of the shock-absorbing layer.

[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: an arc-shaped installation groove is provided on the circumference of the skeleton, the inner core wrapped around the inflation tube is placed on the arc-shaped installation groove, and the wear-resistant layer is fixed on the skeleton.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the inflation tube is made of rubber material, the inner core is made of rubber material, the wear-resistant layer is made of polyurethane material, and the outer side of the wear-resistant layer is provided with a protruding wear-resistant pattern.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the diameter of the inflation tube is smaller than the thickness of the inner core and the wear-resistant layer, and the cross-section of the inner core is elliptical or quasi-elliptical.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the guide column includes a guide column and a guide sleeve, the guide column is arranged in the guide sleeve, and the guide sleeve and the guide column are respectively fixed on the chassis and the shock absorbing plate.

[0009] On the basis of the above solution and as a preferred solution of the above solution: the shock absorbing plate is fixedly connected to the caster bracket or movably connected via a bearing.

[0010] Compared with the prior art, the beneficial effects of the utility model are: a shock-absorbing frame is arranged between the caster bracket and the chassis, and a shock-absorbing spring is used to increase the cushioning and shock-absorbing capacity of the caster; an inflatable rubber tube is wrapped around the inner core of the caster body, and the inflatable rubber tube has specific elasticity, which can relieve the pressure on the wear-resistant layer and reduce the squeezing force between the wear-resistant layer and the ground, thereby reducing the friction force on the wear-resistant layer and improving the wear resistance; a wear-resistant pattern is arranged on the outside of the wear-resistant layer, which can also improve the wear resistance of the wear-resistant layer and extend the service life of the wear-resistant layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the universal wheel of Example 1;

[0012] Figure 2 This is a cross-sectional view of the structure of the universal wheel of Example 1;

[0013] Figure 3 This is a schematic diagram of the structure of the caster body of Example 1;

[0014] Figure 4 This is a structural cross-sectional view of the caster body of Example 1;

[0015] Figure 5 This is a schematic diagram of the structure of the directional wheel of Example 2.

[0016] Marked in the figure are: first chassis 1, first shock absorbing frame 2, shock absorbing plate 21, guide column 221, guide sleeve 222, guide column 22, shock absorbing spring 23, first caster bracket 3, first caster body 4, skeleton 41, inner core 42, wear-resistant layer 43, inflation tube 44, wear-resistant pattern 45, bearing 5, second chassis 6, second shock absorbing frame 7, second caster bracket 8, second caster body 9. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" and "a number" is two or more, unless otherwise clearly and specifically defined.

[0019] Example 1

[0020] The wear-resistant caster described in this embodiment is a universal wheel, including a first chassis 1, a first shock-absorbing frame 2, a first caster bracket 3 and a first caster body 4. The first shock-absorbing frame 2 includes a shock-absorbing plate 21, a guide column 22 and a shock-absorbing spring 23; the guide column 22 includes a guide column 221 and a guide sleeve 222, the guide column 221 is arranged in the guide sleeve 222, and the guide sleeve 222 and the guide column 221 are respectively fixed on the first chassis 1 and the shock-absorbing plate 21; the shock-absorbing spring 23 is arranged between the shock-absorbing plate 21 and the first chassis 1, and the shock-absorbing spring 23 is in a compressed state; when the caster moves on a bumpy ground, the first shock-absorbing frame can alleviate the vibration of the caster through the guide column and the spring to prevent the vibration from being transmitted to the first chassis. The first shock-absorbing frame is arranged between the first caster bracket and the first chassis, and the shock-absorbing spring is used to increase the buffering and shock-absorbing capacity of the caster.

[0021] The shock absorbing plate 21 is movably connected to the first caster bracket 3 via the bearing 5 , so that the first caster bracket 3 can rotate 360 ​​degrees relative to the shock absorbing plate 21 .

[0022] The first caster body 4 is rotatably mounted on the first caster bracket 3 via a rotating shaft. The first caster body 4 includes a skeleton 41, an inner core 42, a shock-absorbing layer and a wear-resistant layer 43. The skeleton 41 is annular, and an arc-shaped mounting groove is provided on the circumference of the skeleton 41; the inner core 42 is an arc-shaped as a whole, and the cross-section is an elliptical or quasi-elliptical structure. The inner core 42 is made of rubber material, which can support the caster but has a certain elasticity; the shock-absorbing layer is composed of an inflatable tube 44 wound around the inner core. The inflatable tube 44 is made of rubber material, which can be squeezed and deformed and restored. It is wound around the outer side of the inner core 42 in circles, and the diameter of the inflatable tube 44 is smaller than the thickness of the inner core 42 and the wear-resistant layer 43. The specific elasticity of the inflatable rubber tube can relieve the pressure on the wear-resistant layer and reduce the squeezing force between the wear-resistant layer and the ground, thereby reducing the friction force on the wear-resistant layer and improving the wear resistance.

[0023] The inner core 42 of the wound inflatable tube is placed on the arc-shaped mounting groove, and the wear-resistant layer 43 is placed on the outer side of the inner core 42 of the wound inflatable tube and fixed on the frame 41. The wear-resistant layer 43 is made of polyurethane, and a protruding wear-resistant pattern 45 is provided on the outer side of the wear-resistant layer 43. Providing the wear-resistant pattern on the outer side of the wear-resistant layer can also improve the wear resistance of the wear-resistant layer and extend the service life of the wear-resistant layer.

[0024] Example 2

[0025] This embodiment is a directional wheel, which includes a second chassis 6, a second shock absorbing frame 7, a second caster bracket 8 and a second caster body 9, wherein the second caster body has the same structure as the first caster body; the second caster bracket includes two mounting plates, and the second caster body is rotatably mounted between the two mounting plates; the mounting plate is fixed below the second shock absorbing frame. The structure of the second shock absorbing frame and the second chassis is the same as that of the first shock absorbing frame and the first chassis in Embodiment 1, and shock absorbing springs are also used to increase the cushioning and shock absorbing capacity of the caster.

[0026] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A wear-resistant caster, comprising a chassis, a shock-absorbing frame, a caster bracket and a caster body, characterized in that: The shock-absorbing frame includes a shock-absorbing plate, a guide column and a shock-absorbing spring, the guide column and the shock-absorbing spring are arranged between the shock-absorbing plate and the chassis, and the caster bracket is installed on the shock-absorbing plate; the caster body is rotatably installed on the caster bracket, and the caster body includes a skeleton, an inner core, a shock-absorbing layer and a wear-resistant layer, the shock-absorbing layer is composed of an inflatable tube wound around the inner core, and the wear-resistant layer is placed on the outside of the shock-absorbing layer.

2. A wear-resistant caster according to claim 1, characterized in that: An arc-shaped installation groove is arranged on the circumference of the frame, the inner core wound around the inflation tube is placed on the arc-shaped installation groove, and the wear-resistant layer is fixed on the frame.

3. The wear-resistant caster according to claim 1, characterized in that: The inflation tube is made of rubber material, the inner core is made of rubber material, the wear-resistant layer is made of polyurethane material, and a convex wear-resistant pattern is arranged on the outer side of the wear-resistant layer.

4. The wear-resistant caster according to claim 1, characterized in that: The diameter of the inflation tube is smaller than the thickness of the inner core and the wear-resistant layer, and the cross section of the inner core is elliptical or quasi-elliptical.

5. The wear-resistant caster according to claim 1, characterized in that: The guide column comprises a guide column and a guide sleeve, the guide column is arranged in the guide sleeve, and the guide sleeve and the guide column are respectively fixed on the chassis and the shock absorbing plate.

6. The wear-resistant caster according to claim 1, characterized in that: The shock absorbing plate is fixedly connected to the caster bracket or movably connected via a bearing.

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