一种长寿命变速箱轴承
By introducing a graphite pin and spring structure into the gearbox bearing, a solid lubricating film is formed and a small amount of braking is provided, which solves the problem of slippage and abrasion of the gearbox bearing under low speed and shifting conditions, and achieves higher operational stability and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINTAN TIANCHI BEARING CO LTD
- Filing Date
- 2025-10-20
- Publication Date
- 2026-07-17
AI Technical Summary
Under conditions such as low load, low temperature start-up, acceleration/deceleration transition, or idling coasting, the rollers of existing gearbox bearings are prone to mismatch between their rotational and circumferential speeds, leading to slippage and creep, increased friction, increased noise, and reduced lifespan. Furthermore, existing measures are insufficient to provide effective micro-braking and continuous lubrication during transient speed changes.
The system employs a combination structure of graphite pins and springs. By placing graphite pins inside the rollers and having them contact the static friction ring, a solid lubricating film is formed and a small amount of braking is provided. This, together with the retaining ring and the raceway, forms a stable oil film, achieving a synergistic effect between the oil film and solid lubrication, thus suppressing slippage and scratches.
It significantly reduces friction and noise during start-stop and speed change conditions, extends bearing life, improves operational stability and efficiency, expands the limiting speed range, and reduces maintenance frequency.
Smart Images
Figure CN224515668U_ABST
Abstract
Claims
1. A long life gearbox bearing comprising: The application discloses a bearing inner ring (1), an outer ring (2), a retaining ring (3) and rollers (5), characterized in that a static friction ring (4) is fixedly sleeved on one side of the bearing inner ring (1); the rollers (5) are uniformly distributed on the surface of the retaining ring (3) in the circumferential direction, and the two sides of the rollers (5) are in sliding abutment with the surface of the bearing inner ring (1) and the inner side of the outer ring (2) respectively; a pin hole (51) is formed in the inner side of the roller (5), and a graphite pin (6) is slidably sleeved in the inner side of the pin hole (51); a spring (61) is fixedly connected to the inner side of the pin hole (51) on one side of the graphite pin (6), and the spring (61) is used for abutting against the graphite pin (6) to make one end of the graphite pin (6) frictionally abut against the surface of the static friction ring (4).
2. A long life gearbox bearing according to claim 1, characterised in that: The static friction ring (4) is an annular wear-resistant member, is coaxially arranged with the bearing inner ring (1), and has a friction working surface on the side facing the roller (5) and used for forming stable frictional contact with the end surface of the graphite pin (6), so that a solid lubricating film is established during operation and a trace braking action is provided to inhibit the roller (5) from slipping.
3. A long life gearbox bearing according to claim 1, wherein: The graphite pin (6) is made of graphite-based solid lubricating material, and the end, which is in contact with the static friction ring (4), is provided with a circular arc transition end surface, which is used for reducing edge stress and improving fitting stability during contact.
4. A long life gearbox bearing according to claim 1, wherein: The spring (61) is a compression spring, one end of which is in abutment with the bottom of the pin hole (51), and the other end is fixedly connected with the graphite pin (6) and used for applying a pre-tightening force to the graphite pin (6).
5. A long life gearbox bearing according to claim 1, wherein: The axis of the pin hole (51) is parallel to the generatrix direction of the roller (5), and a guide chamfer is arranged at the opening of the pin hole (51).
6. A long life gearbox bearing according to claim 1, wherein: The retaining ring (3) is in the form of an annular cage structure, a plurality of retaining cavities for accommodating the rollers (5) are arranged on the retaining ring (3) in the circumferential direction, the retaining cavities are arranged equidistantly in the circumferential direction, and limiting shoulders are arranged on both axial sides.
7. A long life gearbox bearing according to claim 1, wherein: The bearing inner ring (1) and the outer ring (2) are respectively provided with raceway profiles matched with the outer surfaces of the rollers (5) to realize linear contact bearing; a working gap is left between the retaining ring (3) and the raceway for forming a lubricating oil film and cooperatively reducing friction and temperature rise with the solid lubrication provided by the graphite pin (6).