Oil bearing with large oil storage amount
By setting up an oil storage tank between the inner and outer rings of the oil-containing bearings and closing both ends of the oil-containing bearings, the problems of small oil storage and fast lubricating oil loss in existing oil-containing bearings are solved, and higher oil storage and more stable lubricating performance are achieved, extending service life and improving assembly efficiency.
Patent Information
- Application Number
- CN202422362658.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing oil-containing bearings have small oil storage capacity, and the lubricating oil consumption is fast under long-term contact friction, and frequent oil replenishment is required, which leads to an increase in the temperature of the contact surface, which may cause the shaft and bearing to dry grind or get stuck, affecting the service life.
A split oil-containing bearing is designed to increase the amount of oil storage by setting an oil storage tank between the inner ring and the outer ring, and the two ends of the oil storage tank are closed through the inner ring and the outer ring to reduce the possibility of oil leakage.
It greatly improves the oil storage capacity of oil-containing bearings, reduces the possibility of oil leakage, ensures lubricating performance, extends service life, and improves assembly efficiency.
Smart Images
Figure CN222977250U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oil-containing bearings, and particularly to an oil-containing bearing with a large oil storage capacity. Background Art
[0002] A bearing is a component that supports a journal. Sometimes it is also used to support rotating parts on the shaft, such as the planet gears in a planetary gear system and the idler pulley in a belt drive. According to the different friction properties in the bearing, bearings can be divided into two major categories: sliding bearings and rolling bearings.
[0003] The existing oil-containing bearing is a sintered body made by powder metallurgy. It is a spongy porous material as a whole, and the pores can store lubricating oil. Since the thermal expansion coefficients of the porous material and the lubricating oil are different, when working, the oil is squeezed into the friction surface from the pores, and when the work stops, the oil is sucked back into the pores as the temperature drops.
[0004] Regarding the above technical solution, the inventor believes that although the existing oil-containing bearing can store oil relying on its own porous structure, its oil storage capacity is small, and the lubricating oil is consumed quickly under long-term contact friction, and it is necessary to replenish oil in time. Otherwise, it will cause the temperature of the contact surface to rise, and the shaft and the bearing will dry grind or even get stuck, seriously affecting the service life of the shaft and the bearing. And frequent oil replenishment is time-consuming and laborious, affecting the working efficiency of related machines. Utility Model Content
[0005] In order to further increase the oil storage capacity, ensure the lubrication performance, and extend the service life, this application provides an oil-containing bearing with a large oil storage capacity.
[0006] An oil-containing bearing with a large oil storage capacity provided by this application adopts the following technical solution:
[0007] An oil-containing bearing with a large oil storage capacity includes an inner ring and an outer ring sleeved on the inner ring. The outer ring is in interference fit with the inner ring. An oil storage groove is provided on the side wall of the inner circumferential surface of the outer ring. One end of the outer ring is provided with an inner retaining ring inward, one end of the inner ring abuts against the inner retaining ring, the other end is provided with an outer retaining ring outward, and the end of the outer ring away from the inner retaining ring abuts against the outer retaining ring.
[0008] By adopting the above technical solution, the oil-containing bearing has a split structure, and the oil storage groove is arranged between the inner ring and the outer ring, greatly improving its oil storage capacity. And the two ends of the oil storage groove are closed by the inner retaining ring and the outer retaining ring, reducing the possibility of oil leakage. Since the base material of the oil-containing bearing itself is a porous material, the lubricating oil can penetrate from the oil storage groove to the surface of the inner ring or the outer ring, ensuring that an oil film can be stably formed on the inner friction surface of the inner ring or the outer friction surface of the outer ring, ensuring its lubrication performance, and being beneficial to extending its service life.
[0009] Optionally, a plurality of the oil storage grooves are provided, and the plurality of oil storage grooves are arranged in a circumferential array along the inner circumferential surface of the outer ring.
[0010] By adopting the above technical solution, by uniformly arranging a plurality of oil storage grooves on the inner circumferential surface of the outer ring, the oil storage capacity can be greatly increased, and the lubricating oil can penetrate from the oil storage grooves to the surfaces of the outer ring and the inner ring, which is beneficial to ensuring that the oil content rate on the surface of the oil-impregnated bearing is relatively uniform and avoiding the situation of local oil film loss on the inner friction surface of the inner ring or the outer friction surface of the outer ring.
[0011] Optionally, the oil storage grooves are arranged axially along the outer ring or obliquely on the inner circumferential surface of the outer ring.
[0012] Optionally, the cross-sectional shape of the oil storage groove is set to be U-shaped, V-shaped or trapezoidal.
[0013] Optionally, an outer guide conical surface is provided on the outer side of one end of the inner ring away from the outer retaining ring.
[0014] By adopting the above technical solution, during assembly, the outer guide conical surface can facilitate the nesting of the inner ring and the outer ring and reduce the assembly difficulty.
[0015] Optionally, an inner guide conical surface is provided on the inner side of one end of the outer ring away from the inner retaining ring.
[0016] By adopting the above technical solution, during the assembly of the inner ring and the outer ring, the inner guide conical surface facilitates the alignment of the inner ring with the outer ring, and with the guiding effect of the outer guide conical surface, it is convenient for the inner ring and the outer ring to be quickly press-fitted and nested, which is beneficial to improving the assembly efficiency of the oil-impregnated bearing.
[0017] Optionally, the outer ring and the inner retaining ring are integrally sintered and formed.
[0018] Optionally, the inner ring and the outer retaining ring are integrally sintered and formed.
[0019] In summary, the present application includes at least one of the following beneficial technical effects:
[0020] 1. Through the arrangement of the oil storage grooves, the oil storage capacity is greatly improved, and by closing both ends of the oil storage grooves with the inner retaining ring and the outer retaining ring, the possibility of oil leakage is reduced. Since the base material of the oil-impregnated bearing itself is a porous material, the lubricating oil can penetrate from the oil storage grooves to the surface of the inner ring or the outer ring, ensuring that a stable oil film can be formed on the inner friction surface of the inner ring or the outer friction surface of the outer ring, guaranteeing its lubricating performance and being beneficial to extending its service life.
[0021] 2. By uniformly arranging a plurality of oil storage grooves on the inner circumferential surface of the outer ring, the oil storage capacity can be greatly increased, and the lubricating oil can penetrate from the oil storage grooves to the surfaces of the outer ring and the inner ring, which is beneficial to ensuring that the oil content rate on the surface of the oil-impregnated bearing is relatively uniform and avoiding the situation of local oil film loss on the inner friction surface of the inner ring or the outer friction surface of the outer ring.
[0022] 3. Through the settings of the outer tapered surface and the inner tapered surface, when assembling the inner ring and the outer ring, the inner tapered surface facilitates the alignment of the inner ring with the outer ring, and with the guiding effect of the outer tapered surface, it is convenient for the inner ring and the outer ring to be quickly press-fitted and nested, achieving rapid assembly. Description of the Drawings
[0023] Figure 1 It is a schematic diagram of the overall structure of an oil-containing bearing with a large oil storage capacity in Embodiment 1 of the present application.
[0024] Figure 2 It is a cross-sectional view showing the assembly relationship between the inner ring and the outer ring in Embodiment 1 of the present application.
[0025] Figure 3 It is a sectional view of the outer ring showing Embodiment 1 of the present application.
[0026] Figure 4 It is a cross-sectional view of the inner ring showing Embodiment 1 of the present application.
[0027] Figure 5 It is a sectional view of the oil storage groove showing Embodiment 2 of the present application.
[0028] Description of the reference numerals: 1, inner ring; 11, outer retaining ring; 12, outer tapered surface; 2, outer ring; 21, oil storage groove; 22, inner retaining ring; 23, inner tapered surface. Detailed Description of the Invention
[0029] The following will further describe the present application in detail with reference to the Figures 1-5 drawings.
[0030] Embodiment 1:
[0031] Embodiment 1 of the present application discloses an oil-containing bearing with a large oil storage capacity. Referring to Figures 1-2 , an oil-containing bearing with a large oil storage capacity has an assembled structure, including an inner ring 1 and an outer ring 2 sleeved on the inner ring 1, and the outer ring 2 is in interference fit with the inner ring 1. An oil storage groove 21 is formed on the side wall of the inner circumferential surface of the outer ring 2, an inner retaining ring 22 is provided inwardly at one end of the outer ring 2, one end of the inner ring 1 abuts against the inner retaining ring 22, an outer retaining ring 11 is provided outwardly at the other end, and the end of the outer ring 2 away from the inner retaining ring 22 abuts against the outer retaining ring 11.
[0032] This oil-containing bearing has a split structure, and the inner ring 1 and the outer ring 2 remain relatively fixed after assembly. Appropriate materials can be selected as the base materials of the inner ring 1 or the outer ring 2 according to whether the actual friction surface is on the inner side of the inner ring 1 or the outer side of the outer ring 2. For example, if the friction surface is the inner side friction surface of the inner ring 1, a porous material with relatively better structural performance can be selected as the base material of the inner ring 1, which is convenient for cost reduction and can also ensure the service life of the oil-containing bearing.
[0033] When using this oil-impregnated bearing, the oil storage amount is greatly increased through the oil storage groove 21 provided between the inner ring 1 and the outer ring 2, and both ends 21 of the oil storage groove are closed by the inner retaining ring 22 and the outer retaining ring 11, reducing the possibility of oil leakage. Since the base material of the oil-impregnated bearing itself is a porous material, the lubricating oil can penetrate from the oil storage groove 21 to the surface of the inner ring 1 or the outer ring 2, ensuring that an oil film can be stably formed on the inner friction surface of the inner ring 1 or the outer friction surface of the outer ring 2, guaranteeing its lubricating performance and being beneficial to extending its service life.
[0034] Refer to Figure 1 , to ensure the structural strength of this oil-impregnated bearing and at the same time ensure a high oil content rate, the outer ring 2 and the inner retaining ring 22 are integrally sintered and formed by powder metallurgy process, and the inner ring 1 and the outer retaining ring 11 are integrally sintered and formed.
[0035] It is worth noting that when the inner ring 1 and the outer ring 2 are nested, compared with the process of sintering separately first and then riveting, the process of riveting first and then sintering together can make the sealing stability of the inner ring 1 and the outer ring 2 better.
[0036] Refer to Figures 2-3 , the cross-sectional shape of the oil storage groove 21 is set in a U shape, a V shape or a trapezoid, the oil storage groove 21 is arranged along the axial direction of the outer ring 2, there are multiple oil storage grooves 21, and the multiple oil storage grooves 21 are arranged in a circumferential array along the inner circumferential surface of the outer ring 2. By uniformly opening multiple oil storage grooves 21 on the inner circumferential surface of the outer ring 2, its oil storage amount can be greatly increased, and the lubricating oil can penetrate from the oil storage groove 21 to the surfaces of the outer ring 2 and the inner ring 1, which is beneficial to ensuring that the oil content rate on the surface of the oil-impregnated bearing is relatively uniform and avoiding the situation of local oil film loss on the inner friction surface of the inner ring 1 or the outer friction surface of the outer ring 2.
[0037] Refer to Figure 1 and Figures 3-4 , an outer guide cone surface 12 is provided on the outer side of one end of the inner ring 1 away from the outer retaining ring 11. During assembly, the outer guide cone surface 12 can facilitate the nesting of the inner ring 1 and the outer ring 2 and reduce the assembly difficulty; an inner guide cone surface 23 is provided on the inner side of one end of the outer ring 2 away from the inner retaining ring 22. During the assembly of the inner ring 1 and the outer ring 2, the inner guide cone surface 23 can facilitate the alignment of the inner ring 1 with the outer ring 2, and with the guiding effect of the outer guide cone surface 12, it is convenient for the inner ring 1 and the outer ring 2 to be quickly press-fitted and nested, thus being beneficial to improving the assembly efficiency of this oil-impregnated bearing.
[0038] Embodiment 2:
[0039] Embodiment 2 of this application discloses an oil-impregnated bearing with a large oil storage amount. Refer to Figure 5 , the difference between this Embodiment 2 and Embodiment 1 is that: the oil storage groove 21 is obliquely arranged on the inner circumferential surface of the outer ring 2. Compared with Embodiment 1, the path length of a single oil storage groove 21 in Embodiment 2 is longer and can store more lubricating oil.
[0040] The above are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.
Claims
1. An oil-containing bearing with a large oil storage capacity, characterized in that: The invention comprises an inner ring (1) and an outer ring (2) sleeved on the inner ring (1), wherein the outer ring (2) and the inner ring (1) are interference fit, an oil storage groove (21) is provided on the inner peripheral side wall of the outer ring (2), an inner retaining ring (22) is provided inwardly at one end of the outer ring (2), one end of the inner ring (1) is in contact with the inner retaining ring (22), and an outer retaining ring (11) is provided outwardly at the other end, and an end of the outer ring (2) away from the inner retaining ring (22) is in contact with the outer retaining ring (11).
2. The oil-containing bearing with a large oil storage capacity according to claim 1, characterized in that: A plurality of the oil storage grooves (21) are provided, and the plurality of the oil storage grooves (21) are arranged in a circular array along the inner circumferential surface of the outer ring (2).
3. The oil-containing bearing with large oil storage capacity according to claim 1, characterized in that: The oil storage groove (21) is arranged along the axial direction of the outer ring (2) or obliquely on the inner circumferential surface of the outer ring (2).
4. The oil-containing bearing with a large oil storage capacity according to claim 1, characterized in that: The cross-sectional shape of the oil storage tank (21) is U-shaped, V-shaped or trapezoidal.
5. The oil-containing bearing with large oil storage capacity according to claim 1, characterized in that: An outer guide cone surface (12) is provided on the outer side of one end of the inner ring (1) away from the outer retaining ring (11).
6. The oil-containing bearing with a large oil storage capacity according to claim 1, characterized in that: An inner guide cone surface (23) is provided on the inner side of one end of the outer ring (2) away from the inner stop ring (22).
7. The oil-containing bearing with a large oil storage capacity according to claim 1, characterized in that: The outer ring (2) and the inner retaining ring (22) are sintered and formed as one piece.
8. The oil-containing bearing with a large oil storage capacity according to claim 1, characterized in that: The inner ring (1) and the outer retaining ring (11) are sintered and formed as one piece.