Polyurethane elastomer friction wheel

Abstract

The utility model discloses a kind of polyurethane elastomer friction wheel, it is related to polyurethane wheel technical field, including wheel core, high-hardness polyurethane base layer and low-hardness polyurethane strip, high-hardness polyurethane base layer is formed on the outer wall of wheel core by injection molding, low-hardness polyurethane strip is formed on the outer wall of high-hardness polyurethane base layer by injection molding.The low-hardness polyurethane strip and high-hardness polyurethane base layer fusion, effectively solve the contradiction that polyurethane wheel surface layer single hardness polyurethane is difficult to take into account high load capacity and high friction transmission performance in prior art.High-hardness polyurethane layer provides good support, significantly reduces the radial deformation amount of polyurethane wheel under load state and endogenous heat in running process, thereby prolongs service life;And the surface embedded multiple low-hardness polyurethane provides high friction coefficient, ensure that there is sufficient and stable driving force in friction transmission process, effectively avoid transmission skidding phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane wheel technology, and in particular to a polyurethane elastomer friction wheel. Background Technology

[0002] Polyurethane wheels have been widely used due to their excellent wear resistance, elasticity, and fatigue resistance. However, existing polyurethane wheels typically use a single-hardness polyurethane material as the surface layer, a design that reveals significant limitations in practical applications.

[0003] For polyurethane wheels with a single hardness, while higher hardness provides better load-bearing capacity and makes them less prone to deformation under heavy loads, it also results in a relatively low coefficient of friction. During transmission, especially in scenarios requiring high friction to transmit power, slippage can easily occur, leading to inaccurate power transmission and affecting the normal operation of the equipment.

[0004] While polyurethane wheels with low hardness offer a higher coefficient of friction and better frictional transmission performance, effectively preventing slippage during power transmission, they are prone to radial deformation under heavy loads. This not only reduces wheel lifespan but can also decrease the precision of the fit between the wheel and other components, ultimately affecting the stability of the entire transmission system. Utility Model Content

[0005] The purpose of this invention is to provide a polyurethane elastomer friction wheel to solve the above-mentioned technical problems.

[0006] The technical solution adopted in this utility model is as follows: A polyurethane elastomer friction wheel includes a wheel core, a high-hardness polyurethane base layer, and a low-hardness polyurethane strip. The high-hardness polyurethane base layer is cast onto the outer peripheral wall of the wheel core, and the low-hardness polyurethane strip is cast onto the outer wall of the high-hardness polyurethane base layer.

[0007] Preferably, a plurality of low-hardness polyurethane strips are provided, and the plurality of low-hardness polyurethane strips are evenly distributed along the circumferential direction of the high-hardness polyurethane base layer.

[0008] Preferably, the outer peripheral wall of the high-hardness polyurethane base layer is provided with a plurality of strip grooves, which extend along the axial direction of the high-hardness polyurethane base layer.

[0009] As a further preferred embodiment, the low-hardness polyurethane strip is cast into the strip-shaped groove.

[0010] Preferably, the wheel core is made of metal, and the outer peripheral wall of the wheel core is treated with sandblasting and coating with adhesive.

[0011] The above technical solution has the following advantages or beneficial effects: (1) In this utility model, the low-hardness polyurethane strips and the high-hardness polyurethane base layer are integrated, which effectively solves the contradiction in the prior art that the single hardness polyurethane on the surface of the polyurethane wheel is difficult to balance high load capacity and high friction transmission performance. The high-hardness polyurethane layer provides good support, significantly reducing the radial deformation of the polyurethane wheel under load and the internal heat generated during operation, thereby extending its service life; while the multiple low-hardness polyurethane strips embedded on the surface provide a high coefficient of friction, ensuring sufficient and stable driving force during friction transmission, and effectively avoiding transmission slippage.

[0012] (2) In this utility model, under load, multiple low-hardness polyurethane strips embedded on the surface are simultaneously grounded. This composite structure fully utilizes the performance advantages of polyurethane materials with different hardness, and achieves a synergistic improvement in load-bearing capacity and transmission performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the polyurethane elastomer friction wheel in this utility model.

[0014] In the diagram: 1. Wheel core; 2. High-hardness polyurethane base layer; 3. Low-hardness polyurethane strip. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Please see Figure 1 The diagram illustrates a preferred embodiment of a polyurethane elastomer friction wheel, comprising a wheel core 1, a high-hardness polyurethane base layer 2, and a low-hardness polyurethane strip 3. The high-hardness polyurethane base layer 2 is cast onto the outer peripheral wall of the wheel core 1, and the low-hardness polyurethane strip 3 is cast onto the outer wall of the high-hardness polyurethane base layer 2. In this embodiment, the high-hardness polyurethane base layer 2, cast onto the outer peripheral wall of the wheel core 1, utilizes its high hardness to provide good support for the wheel, reducing radial deformation under load and minimizing internal heat generation during operation. Meanwhile, the low-hardness polyurethane strip 3, cast onto the outer wall of the high-hardness polyurethane base layer 2, ensures sufficient and stable driving force during friction transmission due to its high coefficient of friction, preventing slippage. Through this composite structure design, polyurethane materials of different hardnesses perform their respective functions and work synergistically, effectively improving the overall performance of the wheel. In this embodiment, by fusing the low-hardness polyurethane strip 3 and the high-hardness polyurethane base layer 2, a synergistic improvement in load-bearing capacity and transmission performance is achieved.

[0019] Furthermore, as a preferred embodiment, several low-hardness polyurethane strips 3 are provided, and these strips 3 are evenly distributed along the circumferential direction of the high-hardness polyurethane base layer 2. In this embodiment, under load, the multiple low-hardness polyurethane strips 3 embedded in the surface can touch the ground, thereby distributing pressure more evenly and ensuring stable and sufficient frictional force during friction transmission. Simultaneously, the uniform distribution helps maintain the balance of wheel rotation, reducing wear and deformation caused by uneven local force. This prevents problems such as uneven frictional force distribution and wheel rotation imbalance. Moreover, the uniform distribution of the low-hardness polyurethane strips 3 improves the stability and reliability of the wheel during friction transmission, reducing transmission instability and excessively rapid local wear caused by uneven frictional force.

[0020] Furthermore, as a preferred embodiment, several strip-shaped grooves are formed on the outer peripheral wall of the high-hardness polyurethane base layer 2. These grooves extend along the axial direction of the high-hardness polyurethane base layer 2, and low-hardness polyurethane strips 3 are cast into these grooves. The strip-shaped grooves provide positioning and fixing for the low-hardness polyurethane strips 3, allowing them to better bond with the high-hardness polyurethane base layer 2 and preventing them from easily detaching. Simultaneously, the strip-shaped grooves increase the contact area between the low-hardness polyurethane strips 3 and the high-hardness polyurethane base layer 2, enhancing the connection strength between them and further improving the overall performance of the wheel.

[0021] Furthermore, as a preferred embodiment, the wheel core 1 is made of metal, possessing high strength and rigidity, providing solid support for the entire wheel. The outer peripheral wall of the wheel core 1 is treated with sandblasting and adhesive coating. Sandblasting roughens the surface of the wheel core 1, increasing the surface area and thus improving the mechanical bonding ability with the high-hardness polyurethane base layer 2. Adhesive coating further enhances the adhesion between the two, making the bond between the high-hardness polyurethane base layer 2 and the wheel core 1 even tighter. In this embodiment, the sandblasting and adhesive coating treatments significantly improve the bonding strength between the high-hardness polyurethane base layer 2 and the wheel core 1, ensuring the stability of the wheel structure. During use, it can effectively resist the separation of the high-hardness polyurethane base layer 2 from the wheel core 1 due to load and various forces during operation, extending the wheel's service life and improving the overall performance of the wheel.

[0022] In this embodiment, the hardness of the high-hardness polyurethane base layer 2 is preferably 90-96 Shore A, and the hardness of the low-hardness polyurethane strip 3 is preferably 65-85 Shore A.

[0023] When using the friction wheel, control its load and operating speed according to the requirements of the external transmission equipment. Avoid operating the friction wheel beyond its load-bearing capacity to prevent excessive deformation and damage. At the same time, the friction wheel should be inspected regularly to observe its wear and whether the low-hardness polyurethane strip 3 has fallen off.

[0024] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polyurethane elastomer friction wheel, characterized in that, It includes a wheel core, a high-hardness polyurethane base layer, and a low-hardness polyurethane strip. The high-hardness polyurethane base layer is cast onto the outer peripheral wall of the wheel core, and the low-hardness polyurethane strip is cast onto the outer wall of the high-hardness polyurethane base layer.

2. The polyurethane elastomer friction wheel as described in claim 1, characterized in that, Several low-hardness polyurethane strips are provided, and these strips are evenly distributed along the circumferential direction of the high-hardness polyurethane base layer.

3. The polyurethane elastomer friction wheel as described in claim 1, characterized in that, The outer peripheral wall of the high-hardness polyurethane base layer is provided with several strip-shaped grooves, which extend along the axial direction of the high-hardness polyurethane base layer.

4. The polyurethane elastomer friction wheel as described in claim 3, characterized in that, The low-hardness polyurethane strip is cast into the strip groove.

5. The polyurethane elastomer friction wheel as described in claim 1, characterized in that, The wheel core is made of metal, and its outer peripheral wall is treated with sandblasting and adhesive coating.

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