Surface texture roller pin for cycloidal pin wheel speed reducer

Abstract

The utility model relates to the field of design of cycloidal pin wheel speed reducers, and discloses a surface texture roller pin for a cycloidal pin wheel speed reducer. Surface textures machined by laser are arranged on the surfaces of the roller pins, the surface textures are circular micro-pits, and the distribution mode of the surface textures on the surfaces of the roller pins is a square dot matrix with consistent opposite angles. The cross section of each circular micro-pit texture is in a circular arc shape, the depth-to-width ratio of each circular micro-pit is 0.2, the surface density of each circular micro-pit is 2.5%-8%, the pits comprise large pits and small pits, and the large pits and the small pits are arranged in a staggered mode in the adjacent warp and weft directions of the surface of the roller pin. Micro-pit texture machining is conducted on the surface of the high-carbon-chromium bearing steel roller pin through the laser texturing technology, the micro-pits in the surface are beneficial to formation of a lubricating film and storage of abrasive dust, and especially due to the design that the large pits and the small pits are arranged at intervals, the better abrasion-resistant effect is further achieved, friction between the cycloidal gear and the roller pin is reduced, abrasion is reduced, and the service life of the cycloidal gear is prolonged. And the service life of the cycloidal-pin wheel speed reducer is prolonged.

Description

Technical Field

[0001] The present application relates to the field of cycloidal pinwheel reducer design, and in particular to a surface textured needle roller for a cycloidal pinwheel reducer. Background Art

[0002] During the operation of the cycloid reducer, when the cycloid wheel and the needle roller are meshed for transmission, sliding friction and rolling friction act simultaneously, causing the cycloid wheel to wear in a complex and variable manner. At the same time, the wear debris from the cycloid wheel pin-tooth pair meshing process will destroy the original lubrication conditions, gradually reducing the efficiency and reliability of the cycloid reducer.

[0003] Reducing friction and wear, improving lubrication performance, and extending service life have become urgent issues to be solved when studying cycloid pinwheel reducers. At present, there are few technical solutions for the design of needle roller surfaces to reduce wear, improve lubrication, and extend service life. Summary of the invention

[0004] The present application provides a surface textured needle roller for a cycloidal pinwheel reducer, which has the characteristics of reducing friction and wear, improving lubrication performance, and extending service life during the meshing process, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a surface-textured needle roller for a cycloidal pinwheel reducer, wherein the surface of the needle roller is provided with a surface texture processed by laser, and the surface texture is circular micro-pits, and the center points of the circular micro-pits are arranged on the surface of the needle roller in a diagonally consistent square lattice.

[0006] In an embodiment of the present application, the cross section of the circular micro-pit texture is an arc shape.

[0007] In the embodiment of the present application, the circular micro-pits have a depth-to-width ratio of 0.2, a surface density of 2.5-8%, and a pit diameter of 100-200 μm.

[0008] In a more specific embodiment of the present application, the surface density is 2.5%, and the spacing between the center points of the pits is 500 μm.

[0009] In the implementation manner of the present application, the circular micro-pits include large pits and small pits, and the large and small pits are arranged alternately in the warp and weft directions adjacent to the surface of the needle roller.

[0010] In a more specific embodiment of the present application, the diameter of the large pit is 200 μm, and the diameter of the small pit is 100 μm.

[0011] In the implementation manner of the present application, the material of the needle roller is high-carbon chromium bearing steel, and the surface texture of the needle roller surface is formed by laser processing and then polishing.

[0012] Compared with the prior art, the beneficial effects of this application are:

[0013] The present invention provides a micro-pit texture on the surface of the needle roller, uses laser texturing technology to texture the surface of the needle roller made of high carbon chromium bearing steel, and polishes it to remove the "burrs". The micro-pits on the surface are conducive to the formation of lubricating film and the storage of wear debris, and have a positive effect on friction and lubrication performance under fluid lubrication, thin film lubrication, boundary lubrication and solid contact; in particular, the design of the interval between large and small pits further achieves better wear resistance, reduces the friction between the cycloidal wheel and the needle roller, reduces wear, and extends the service life of the cycloidal pinwheel reducer.

[0014] In addition, the presence of microtexture reduces the contact area between the friction pairs. At the same time, the surface texture can store lubricating oil and perform "secondary lubrication", which is beneficial to reduce adhesion and friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional schematic diagram of an embodiment provided in this application;

[0016] Figure 2 A partial cross-sectional view of an embodiment provided in this application;

[0017] Figure 3 This is a partial schematic diagram of the assembly of the embodiment provided in the present application applied to a cycloid pinwheel reducer.

[0018] Description of reference numerals:

[0019] 1 Needle rolling, 2 surface texture. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] At present, the continuous extension of the service life of cycloidal pinwheel reducers has become a key research direction, but there are not many design solutions for the surface structure of needle rollers. With the continuous development of science and technology, people have been inspired by nature to find that it is not the smaller the surface roughness of the material that can effectively reduce friction and wear, but the surface with texture morphology has better tribological properties. Therefore, this application provides a solution for the surface texture needle roller of cycloidal pinwheel reducers. For specific embodiments, please refer to Figures 1 to 3 .

[0022] A surface textured needle roller for a cycloidal pinwheel reducer, wherein the surface of the needle roller 1 is provided with a surface texture 2 processed by laser, the surface texture 2 is circular micro-pits, and the center points of the circular micro-pits are arranged in a diagonally consistent square lattice on the surface of the needle roller.

[0023] Specifically, the micro-pits of the surface texture 2 can collect abrasive particles, reduce friction and wear, store grease, and improve lubrication conditions, thereby effectively reducing the friction between the cycloid wheel and the needle roller, reducing wear, and extending the service life of the cycloid pinwheel reducer.

[0024] In the implementation of this application, please refer to Figure 2 The circular micro-pit texture has a circular arc-shaped pit cross-section. The circular micro-pit depth-to-width ratio is 0.2, the surface density is 2.5-8%, the pit diameter is 100-200μm, and the circular micro-pits include large pits and small pits. The large and small pits are arranged alternately in the adjacent longitude and latitude directions.

[0025] Specifically, the sizes of wear debris particles that are peeled off during the meshing process of the cycloidal pin-tooth pair are inconsistent. The intervals between the large and small pits allow micro-pits of different diameters to capture more wear particles, which can achieve better wear resistance and better effects on the long-term operation of the equipment.

[0026] In a more specific embodiment of the present application, the circular micro-pits have a depth-to-width ratio of 0.2, a surface density of 2.5%, and a center-to-center spacing of 500 μm. The diameter of the large pits is 200 μm, and the diameter of the small pits is 100 μm. The large and small pits are arranged adjacent to each other, combined with a suitable micro-pit spacing, to achieve lower wear.

[0027] In the implementation manner of the present application, the material of the needle roller is high-carbon chromium bearing steel, and the surface texture of the needle roller surface is formed by laser processing and then polishing to remove the "burrs".

[0028] The above is merely a detailed description of the specific implementation methods of the present application. Technicians in the technical field to which the present application belongs can make various changes and additions to the described specific implementation methods or replace them in a similar manner. The technical scope of the present application should be determined by the claims, and should also include the meaning equivalent to the contents recorded in the claims and all changes within the scope thereof.

Claims

1. A surface textured needle roller for a cycloid pinwheel reducer, characterized in that: The surface of the needle roller is provided with a surface texture processed by laser, and the surface texture is circular micro-pits, and the center points of the circular micro-pits are arranged on the surface of the needle roller in a diagonally consistent square dot matrix; the circular micro-pits include large pits and small pits, and the large and small pits are arranged alternately in the adjacent longitude and latitude directions.

2. The surface textured needle roller for a cycloid pinwheel reducer according to claim 1, characterized in that: The cross section of the circular micro-pit texture is an arc shape.

3. The surface textured needle roller for a cycloidal pinwheel reducer according to claim 1, characterized in that: The circular micro-pits have a depth-to-width ratio of 0.2, a surface density of 2.5-8%, and a pit diameter of 100-200 μm.

4. The surface textured needle roller for a cycloid pinwheel reducer according to claim 3, characterized in that: The surface density is 2.5%, and the spacing between the center points of the pits is 500 μm.

5. The surface textured needle roller for a cycloid pinwheel reducer according to claim 1, characterized in that: The diameter of the large pit is 200 μm, and the diameter of the small pit is 100 μm.

6. The surface textured needle roller for a cycloid pinwheel reducer according to claim 1, characterized in that: The material of the needle roller is high-carbon chromium bearing steel, and the surface texture of the needle roller surface is formed by laser processing and then polishing.

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