Bearing structure of speed reducer

Abstract

The utility model relates to the field of bearing structures, and provides a speed reducer bearing structure which comprises a roller, a retainer, an outer ring and an inner ring. The plurality of rollers are arranged, the retainer is provided with a plurality of mounting grooves, and the plurality of rollers are mounted in the plurality of mounting grooves in a one-to-one correspondence manner; the outer ring and the retainer are coaxially arranged, and the inner wall of the outer ring is used for being connected with the rollers in an abutting mode; the inner ring and the retainer are coaxially arranged, and the outer wall of the inner ring is used for being connected with the rollers in an abutting mode; a first oil storage groove is formed in the outer wall of the inner ring, the first oil storage groove is filled with a first oil storage piece, the first oil storage piece is provided with multiple holes, and lubricating oil is stored in holes of the first oil storage piece. The device has the effects of improving the problem that lubricating oil is easily thrown out by centrifugal force in the rotating process and reducing abrasion.

Description

A gear reducer bearing structure Technical Field

[0001] This application relates to the field of bearing structures, and more particularly to a gearbox bearing structure. Background Technology

[0002] Bearings are components in mechanical equipment that support rotating shafts. Their main functions are to reduce friction, bear loads, and ensure rotational accuracy. They are mainly divided into two categories: sliding bearings and rolling bearings.

[0003] The bearings commonly used in speed reducers are tapered roller bearings or cylindrical roller bearings. Traditional roller bearings consist of an outer ring, an inner ring, rollers, and a cage. When the bearing is running at high speed, the lubricating oil is easily thrown out by centrifugal force, resulting in poor lubrication in the contact area between the rollers and the raceway, and accelerating wear. Summary of the Invention

[0004] In order to improve the problem that lubricating oil is easily thrown out by centrifugal force during rotation and reduce wear, this application provides a reducer bearing structure.

[0005] The reducer bearing structure provided in this application adopts the following technical solution:

[0006] A reducer bearing structure includes rollers, a cage, an outer ring, and an inner ring. Multiple rollers are provided, and the cage has multiple mounting slots, with each roller corresponding to one of the mounting slots. The outer ring is coaxially arranged with the cage, and its inner wall is used for the rollers to abut against it. The inner ring is coaxially arranged with the cage, and its outer wall is used for the rollers to abut against it. A first oil reservoir is formed on the outer wall of the inner ring, filled with a first oil reservoir component. The first oil reservoir component is porous, and lubricating oil is stored in its pores.

[0007] By adopting the above technical solution, the lubricating oil is temporarily stored in the pores of the first oil reservoir. During the operation of the bearing, if the lubricating oil in the bearing is thrown out, the lubricating oil stored in the first oil reservoir will be gradually and continuously thrown out under the action of centrifugal force as the inner ring rotates. The thrown-out lubricating oil will gradually reach the space between the roller and the outer ring through the cage and roller to replenish lubrication, thereby improving the problem that the lubricating oil is easily thrown out by centrifugal force during rotation and reducing the wear between the various components of the bearing.

[0008] Optionally, the first oil storage tank is arranged around the inner ring in a circumferential direction, and multiple first oil storage tanks are provided. The multiple first oil storage tanks are arranged at intervals along the axial direction of the inner ring.

[0009] By adopting the above technical solution, the oil output of the first oil reservoir is more uniform, ensuring the uniformity of lubrication replenishment.

[0010] Optionally, the spacing between adjacent first oil storage tanks is consistent.

[0011] Optionally, a second oil reservoir is provided on the circumference of the roller, and a second oil reservoir is filled in the second oil reservoir. The second oil reservoir is porous, and lubricating oil is stored in the pores of the second oil reservoir.

[0012] By adopting the above technical solution, during the operation of the bearing, the lubricating oil in the second oil reservoir can be gradually released to replenish the contact area between the roller and the raceway, thereby improving the lubrication effect, reducing the problem of poor lubrication caused by lubricating oil being thrown out, reducing the wear between the roller and the raceway, and extending the service life of the bearing.

[0013] Optionally, the second oil reservoir is spirally arranged around the roller.

[0014] By adopting the above technical solution, the lubricating oil can more easily and evenly cover the running surfaces of the rollers and inner and outer rings under the action of centrifugal force, thereby significantly improving the lubrication effect, reducing friction and wear between the rollers and raceways, and improving the service life and operational stability of the bearing.

[0015] Optionally, the outer wall of the outer ring is provided with a plurality of heat dissipation fins, which extend along the axial direction of the outer ring and are arranged at intervals along the circumference of the outer ring.

[0016] By adopting the above technical solutions, the contact area between the outer ring and the surrounding environment is increased, the heat dissipation efficiency is improved, which helps to reduce the temperature generated by the bearing during high-speed operation, reduce the decline in lubricating oil performance and bearing component wear caused by high temperature, and extend the service life of the bearing.

[0017] Optionally, the heat dissipation fins are detachably connected to the outer ring.

[0018] By adopting the above technical solution, on the one hand, the heat sink fins can be easily replaced or cleaned when damaged or requiring maintenance; on the other hand, it is convenient to select heat sink fins of appropriate size to install on the outer ring according to the bearing installation space, thereby improving the flexibility of the bearing structure.

[0019] Optionally, the heat dissipation fins have an internal cavity filled with a phase change material, the phase change material having a phase change temperature of not less than 60°C.

[0020] By adopting the above technical solution, the heat generated during bearing operation is effectively absorbed, and a large amount of latent heat is absorbed through the phase change process when the temperature reaches the phase change temperature, thereby reducing the temperature rise of the outer ring, improving the heat dissipation performance of the bearing, and extending the service life of the bearing.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By setting a porous first oil reservoir on the outer wall of the inner ring, lubricating oil can be effectively stored and continuously released during high-speed operation, reducing the problem of poor lubrication caused by centrifugal force, thereby reducing wear between the roller and the raceway;

[0023] 2. A second oil reservoir filled with lubricating oil is provided on the periphery of the roller, which further improves the uniformity and durability of lubrication and ensures that the contact area between the roller and the raceway is always in a good lubrication state;

[0024] 3. The outer ring is equipped with heat dissipation fins and is filled with phase change material, which significantly enhances the heat dissipation performance of the bearing, effectively controls the operating temperature, extends the service life of the bearing, and improves the operational stability. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0026] Figure 2 is an exploded view showing the bearing structure in Example 1.

[0027] Figure 3 is a structural schematic diagram of Embodiment 2 of this application.

[0028] Figure 4 is a structural schematic diagram of Embodiment 3 of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Roller; 11. Second oil reservoir; 2. Cage; 21. Mounting groove; 3. Outer ring; 31. Insertion groove; 4. Inner ring; 41. First oil reservoir; 5. Heat dissipation fins; 51. Receiving cavity; 52. Phase change material. Detailed Implementation

[0030] The present application will be further described in detail below with reference to Figures 1-4.

[0031] This application discloses a gearbox bearing structure.

[0032] Example 1

[0033] Referring to Figures 1 and 2, a reducer bearing structure includes rollers 1, a cage 2, an outer ring 3, and an inner ring 4. Multiple rollers 1 are provided, and the cage 2 has multiple mounting grooves 21, with each roller 1 corresponding to one of the mounting grooves 21. The outer ring 3 is coaxially arranged with the cage 2, and its inner wall is used for the rollers 1 to abut against it. An inner ring 4 is also coaxially arranged with the cage 2, and its outer wall is used for the rollers 1 to abut against it.

[0034] The outer wall of the inner ring 4 has a first oil reservoir 41, which is filled with a first oil reservoir component. The first oil reservoir component is porous, and lubricating oil is stored in the pores of the first oil reservoir component. The lubricating oil is temporarily stored in the pores of the first oil reservoir component. During the operation of the bearing, if the lubricating oil in the bearing is thrown out, as the inner ring 4 rotates, under the action of centrifugal force, the lubricating oil stored in the first oil reservoir component is gradually and continuously thrown out. The thrown-out lubricating oil gradually reaches the space between the outer ring 3 and the outer ring 3 through the cage 2 and the roller 1 for supplemental lubrication, thereby improving the problem of lubricating oil being easily thrown out by centrifugal force during rotation and reducing wear between the bearing components.

[0035] In this embodiment, the first oil storage component is a porous metal material, such as sintered bronze or sintered iron-based materials, which has advantages such as high strength, good wear resistance and low cost.

[0036] The first oil reservoir 41 is arranged around the inner ring 4 in a circumferential manner. Multiple first oil reservoirs 41 are arranged at equal intervals along the axial direction of the inner ring 4, so that the oil output of the first oil reservoir is more uniform and the uniformity of lubrication is ensured.

[0037] Furthermore, a second oil reservoir 11 is provided on the circumference of the roller 1. The second oil reservoir 11 is filled with a second oil reservoir component, which is porous and stores lubricating oil in its pores. This second oil reservoir component increases the oil storage capacity, further replenishing the lubricating oil during bearing operation.

[0038] In this embodiment, the second oil reservoir 11 is spirally arranged around the central axis of the roller 1, thereby effectively extending the distribution path of the lubricating oil on the surface of the roller 1. This makes it easier for the lubricating oil to evenly cover the running surface of the roller 1 in contact with the inner and outer rings 3 under the action of centrifugal force, thereby significantly improving the lubrication effect, reducing the friction and wear between the roller 1 and the raceway, and improving the service life and operational stability of the bearing.

[0039] The implementation principle of Example 1 is as follows: By providing a first oil reservoir 41 and a first oil reservoir with multiple holes on the outer wall of the inner ring 4, lubricating oil can be effectively stored and continuously released during high-speed operation, thereby improving the lubrication conditions in the contact area between the roller 1 and the raceway, reducing wear, and extending the service life of the bearing. Simultaneously, by providing a second oil reservoir 11 and a second oil reservoir with multiple holes on the circumference of the roller 1, the storage capacity and distribution range of the lubricating oil are further increased, improving the lubrication effect.

[0040] Example 2

[0041] Referring to Figure 3, the difference between this embodiment and Embodiment 1 is that multiple heat dissipation fins 5 are detachably connected to the outer wall of the outer ring 3. The heat dissipation fins 5 extend axially along the outer ring 3, and are arranged at equal intervals along the circumference of the outer ring 3, thereby increasing the contact area between the outer ring 3 and the surrounding environment and improving the heat dissipation performance during bearing operation. The purpose of detachably connecting the heat dissipation fins 5 to the outer ring 3 is twofold: firstly, to facilitate bearing maintenance; and secondly, to facilitate the selection and installation of heat dissipation fins 5 of appropriate size according to the bearing's installation environment, thus improving the flexibility of the bearing structure.

[0042] Specifically, the structure for the detachable connection between the heat dissipation fins 5 and the outer ring 3 is as follows: the outer wall of the outer ring 3 is provided with multiple insertion slots 31, which are used for the heat dissipation fins 5 to be inserted, and the multiple insertion slots 31 correspond one-to-one with the multiple heat dissipation fins 5.

[0043] The heat dissipation fins 5 and the insertion slots 31 are interference-fitted. When installing the heat dissipation fins 5, simply tap the heat dissipation fins 5 into the insertion slots 31.

[0044] Example 3

[0045] Referring to Figure 4, the difference between this embodiment and Embodiment 1 is that the heat dissipation fins 5 have an internal cavity 51 filled with a phase change material 52. The phase change temperature of the phase change material 52 is not less than 60°C. Therefore, during the operation of the bearing, if the temperature rises to the phase change temperature of the phase change material 52, the phase change material 52 undergoes a phase change, absorbing a large amount of heat, improving the heat dissipation performance of the bearing structure, and extending the service life of the bearing. In addition, after the bearing stops operating, when the temperature of the heat dissipation fins 5 drops to the phase change temperature of the phase change material 52, the phase change material 52 gradually releases heat under the influence of the external temperature, so that the temperature of the bearing and its vicinity does not change suddenly, thus providing a certain degree of protection for the bearing and extending its service life.

[0046] Phase change material 52 can be selected from materials such as paraffin, fatty acids or inorganic salt hydrates. These materials have high latent heat of phase change and good chemical stability, and can play a stable heat dissipation role for a long time.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reducer bearing structure, characterized in that: It includes rollers (1), a cage (2), an outer ring (3), and an inner ring (4); multiple rollers (1) are provided, and the cage (2) has multiple mounting slots (21), with multiple rollers (1) installed in the multiple mounting slots (21) in a one-to-one correspondence; the outer ring (3) is coaxially arranged with the cage (2), and the inner wall of the outer ring (3) is used for the rollers (1) to abut against; the inner ring (4) is coaxially arranged with the cage (2), and the outer wall of the inner ring (4) is used for the rollers (1) to abut against; the outer wall of the inner ring (4) is provided with a first oil storage groove (41), the first oil storage groove (41) is filled with a first oil storage element, the first oil storage element is porous, and the pores of the first oil storage element store lubricating oil.

2. The reducer bearing structure according to claim 1, characterized in that: The first oil storage tank (41) is arranged around the inner ring (4) in a circumferential direction. There are multiple first oil storage tanks (41). The first oil storage tanks (41) are arranged around the inner ring (4) in a circumferential direction. The multiple first oil storage tanks (41) are arranged at intervals along the inner ring (4).

3. The reducer bearing structure according to claim 2, characterized in that: The spacing between adjacent first oil storage tanks (41) is consistent.

4. The reducer bearing structure according to claim 1, characterized in that: The roller (1) has a second oil reservoir (11) on its circumference. The second oil reservoir (11) is filled with a second oil reservoir component. The second oil reservoir component is porous and stores lubricating oil in its pores.

5. A reducer bearing structure according to claim 4, characterized in that: The second oil reservoir (11) is spirally arranged around the roller (1).

6. The reducer bearing structure according to claim 1, characterized in that: The outer wall of the outer ring (3) is provided with a plurality of heat dissipation fins (5), the heat dissipation fins (5) extend along the axial direction of the outer ring (3), and the plurality of heat dissipation fins (5) are arranged at intervals along the circumference of the outer ring (3).

7. A reducer bearing structure according to claim 6, characterized in that: The heat dissipation fins (5) are detachably connected to the outer ring (3).

8. A reducer bearing structure according to claim 7, characterized in that: The heat dissipation fins (5) have an internal cavity (51) filled with a phase change material (52), and the phase change temperature of the phase change material (52) is not lower than 60°C.

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