Oil storage structure of a reduction gearbox bearing
Patent Information
- Application Number
- CN202521810078.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-08-25
AI Technical Summary
圆锥滚子轴承由内圈、外圈、锥形滚子和保持架组成，其滚子与滚道呈线接触，接触应力大，且工作时滚子随轴旋转会产生离心力，导致润滑油易向滚子大端流失
本申请提供的一种减速箱轴承的储油结构能够实现润滑油的留存，避免轴承长时间停放后油膜干涸，而避免轴承擦伤或烧蚀。减速箱停止运行时，由于储油板覆盖于轴承外侧，其凹槽结构能够留存一定润滑油，润滑油附着在轴承外圈表面及滚道附近，避免轴承因长时间停放导致油膜流失，减速箱启动后，齿轴带动轴承内圈旋转，内圈与滚子摩擦产生驱动力，使滚子沿外圈滚道滚动，同时，齿轴外周齿轮旋转时飞溅的润滑油能够被储油板拦截，汇集于其凹槽内，补充储油量，轴承运转过程中，滚子旋转与储油板内润滑油接触形成持续油膜，避免轴承长时间停放后油膜干涸，两个螺栓对储油板进行固定，确保储油板在减速箱震动与齿轴高速旋转下不发生位移，始终保持对轴承的覆盖状态，保障储油与供油的稳定性。
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Figure CN224800920U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive gearbox technology, and more specifically, to an oil storage structure for a gearbox bearing. Background Technology
[0002] As the core assembly for power transmission in new energy vehicles, the electric drive axle's reducer plays a crucial role in converting the high-speed, low-torque motor into the low-speed, high-torque required by the wheels. Bearings, as core components within the reducer that support the gear shaft and balance radial and axial loads, directly determine the reliability and service life of the electric drive axle. In new energy vehicles, electric drive axle reducers, due to the need to withstand frequent motor starts and stops, high speeds, and large torque impacts, generally utilize tapered roller bearings. Tapered roller bearings consist of an inner ring, an outer ring, tapered rollers, and a cage. The rollers and raceways are in line contact, resulting in high contact stress. During operation, the rollers rotate with the shaft, generating centrifugal force, which causes lubricating oil to easily leak towards the larger end of the rollers. Furthermore, after a vehicle has been parked for an extended period, the lubricating oil adhering to the bearing raceways and roller surfaces gradually drips off due to gravity, leaving a dry state. If the vehicle suddenly accelerates rapidly, the reducer instantly transitions from a stationary to high-speed operation. The bearing friction surface needs to form an effective oil film immediately, but the remaining lubricating oil, due to its viscosity and inertia, cannot flow quickly to the contact area. This results in direct dry friction between the rollers and raceways, generating a large amount of frictional heat in a short time, causing bearing scratches and burning. In severe cases, it may cause bearing seizure, forcing the electric drive axle to fail. Therefore, there is an urgent need for an oil storage structure for gearbox bearings. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0004] Therefore, this application provides an oil storage structure for a gearbox bearing, which can retain lubricating oil and prevent the oil film from drying out after the bearing has been parked for a long time, thus avoiding bearing scratches or burning.
[0005] The oil reservoir structure for a gearbox bearing provided in this application includes a housing, a gear shaft, a bearing, an oil reservoir plate, and bolts. The housing serves as the fixed support for the gearbox and has a bearing seat and multiple threaded holes. The gear shaft extends laterally through the interior of the housing. The bearing is fitted around the outer circumference of the gear shaft and includes an inner ring and an outer ring. The inner ring mates with the gear shaft, and the outer ring mates with the bearing seat hole in the housing. The oil reservoir plate is detachably mounted on the inner wall of the housing and covers the outer side of the bearing. Two bolts are spaced apart and pass through the oil reservoir plate. The shank of each bolt is clearance-fitted with a through hole in the oil reservoir plate, and its end is fastened to a pre-drilled threaded hole in the housing.
[0006] In some embodiments, the oil reservoir plate is in the shape of a semi-circular groove, the opening of the groove faces the bearing, and the width of the groove is adapted to the outer ring of the bearing.
[0007] In some embodiments, the oil reservoir plate is made of nylon or POM material.
[0008] In some embodiments, a sealant is applied between the mating surfaces of the oil reservoir plate and the housing.
[0009] In some embodiments, the height of the oil reservoir plate is higher than the inner diameter of the outer ring of the bearing.
[0010] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects: This application provides an oil storage structure for a gearbox bearing that retains lubricating oil, preventing the oil film from drying out after prolonged storage and thus avoiding bearing scratches or burning. When the gearbox is not running, the oil reservoir plate covers the outside of the bearing, and its groove structure retains a certain amount of lubricating oil. The lubricating oil adheres to the surface of the outer ring of the bearing and near the raceway, preventing the oil film from being lost due to prolonged storage. After the gearbox starts, the gear shaft drives the inner ring of the bearing to rotate. The friction between the inner ring and the rollers generates driving force, causing the rollers to roll along the outer ring raceway. At the same time, the lubricating oil splashed by the rotation of the gear shaft's outer peripheral gears can be intercepted by the oil reservoir plate and collected in its groove, replenishing the oil storage. During bearing operation, the rotation of the rollers and the contact with the lubricating oil in the oil reservoir plate form a continuous oil film, preventing the oil film from drying out after prolonged storage. Two bolts fix the oil reservoir plate to ensure that it does not shift under the vibration of the gearbox and the high-speed rotation of the gear shaft, always maintaining a covering state for the bearing and ensuring the stability of oil storage and supply.
[0011] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0012] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the housing and gear shaft according to some embodiments of this application; Figure 2 These are schematic diagrams of the housing and bearing structures of some embodiments of this application; Figure 3 Exploded views of the oil reservoir plate in some embodiments of this application; Figure 4 This is a schematic diagram of the structure of the oil reservoir plate and bolts in some embodiments of this application.
[0013] in, Figures 1 to 4The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Housing; 2. Gear shaft; 3. Bearing; 4. Oil reservoir plate; 5. Bolt. Detailed Implementation
[0014] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0015] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0016] The following reference Figures 1 to 4 This application describes an oil reservoir structure for a gearbox bearing provided according to some embodiments.
[0017] like Figures 1 to 4 As shown, an oil storage structure for a gearbox bearing provided according to some embodiments of this application includes a housing 1, a gear shaft 2, a bearing 3, an oil reservoir plate 4, and bolts 5. The housing 1 is used for the fixed support of the gearbox and has a bearing seat and multiple threaded holes. The gear shaft 2 is transversely inserted inside the housing 1. The bearing 3 is sleeved on the outer circumference of the gear shaft 2 and includes an inner ring and an outer ring. The inner ring mates with the gear shaft 2, and the outer ring mates with the bearing seat hole of the housing 1. The oil reservoir plate 4 is detachably installed on the inner wall of the housing 1 and covers the outer side of the bearing 3. Two bolts 5 are spaced apart and inserted into the oil reservoir plate 4. The shank of each bolt 5 is clearance-fitted with a through hole in the oil reservoir plate 4, and the end is fastened to a pre-set threaded hole in the housing 1.
[0018] In this embodiment, when the gearbox stops running, the oil reservoir plate 4 covers the outside of the bearing 3, and its groove structure can retain a certain amount of lubricating oil. The lubricating oil adheres to the outer ring surface and near the raceway of the bearing 3, preventing the oil film from being lost due to prolonged storage. After the gearbox starts, the gear shaft 2 drives the inner ring of the bearing 3 to rotate. The friction between the inner ring and the roller generates driving force, causing the roller to roll along the outer ring raceway. At the same time, the lubricating oil splashed by the outer gear of the gear shaft 2 can be intercepted by the oil reservoir plate 4 and collected in its groove to replenish the oil storage. During the operation of the bearing 3, the rotation of the roller and the contact with the lubricating oil in the oil reservoir plate 4 form a continuous oil film, preventing the oil film from drying out after the bearing 3 has been stored for a long time. Two bolts 5 fix the oil reservoir plate 4 to ensure that the oil reservoir plate 4 does not shift under the vibration of the gearbox and the high-speed rotation of the gear shaft 2, and always maintains the covering state of the bearing 3, ensuring the stability of oil storage and supply.
[0019] In some possible embodiments, such as Figure 2 As shown, the oil reservoir plate 4 is in the shape of a semi-circular groove, with the opening of the groove facing the bearing 3, and the width of the groove is adapted to the outer ring of the bearing 3.
[0020] In this embodiment, the semi-circular groove can retain a certain amount of lubricating oil when the vehicle is stationary, preventing the oil film from drying out after a long period of parking.
[0021] In some possible embodiments, the oil reservoir 4 is made of nylon or POM material.
[0022] In this embodiment, both nylon and POM materials have low surface energy characteristics, and the adhesion of lubricating oil to their surfaces is weaker than that of metal materials. This allows the lubricating oil in the oil reservoir to flow to the bearing 3 more efficiently. At the same time, the oil resistance of nylon and POM materials can prevent material aging and cracking caused by long-term contact with gear oil, ensuring the sealing of the oil reservoir. Furthermore, when non-metallic materials come into contact with the outer ring of the metal bearing 3, no sparks or severe friction will be generated, thus avoiding scratches on the outer ring of the bearing 3.
[0023] It should be noted that the oil reservoir plate 4 can be made of plastic or other materials according to actual needs.
[0024] In some possible embodiments, sealant is applied between the mating surfaces of the oil reservoir 4 and the housing 1.
[0025] In this embodiment, the sealant forms an elastomer after curing, which has good flexibility and temperature resistance and can withstand long-term immersion of gear oil in the gearbox. The sealant can effectively seal the assembly gap between the oil reservoir plate 4 and the housing 1, prevent the lubricating oil in the oil reservoir plate 4 from leaking out of the gap, and ensure the stable oil storage capacity of the oil reservoir plate 4.
[0026] In some possible embodiments, such as Figure 2 As shown, the height of the oil reservoir plate 4 is higher than the inner diameter of the outer ring of the bearing 3.
[0027] In this embodiment, the inner diameter of the outer ring of the bearing 3 is the contact area between the raceway and the roller. The oil reservoir 4 covers the inner diameter of the outer ring of the bearing 3. Under the action of the bearing 3, the lubricating oil in the groove flows directly to the raceway and the roller, reducing the oil supply path and improving the timeliness of lubrication.
[0028] When the gearbox bearing's oil storage structure is in operation, when the gearbox stops running, the semi-circular groove of the oil reservoir plate 4 retains lubricating oil using its own arc-shaped structure. The lubricating oil naturally adheres to the outer ring surface of the bearing 3 due to gravity, and the groove guides the oil to gather at the lowest point of the bearing 3, ensuring that the outer ring and raceway of the bearing 3 are always covered with an oil film, preventing oil film loss due to prolonged storage. Simultaneously, the sealant on the contact surface between the oil reservoir plate 4 and the housing 1 seals the assembly gap, preventing lubricating oil leakage and ensuring a stable oil storage volume. After the gearbox starts, the gear shaft 2 drives the inner ring of the bearing 3 to rotate, and the friction between the inner ring and the rollers generates driving force, causing... As the rollers roll along the outer raceway, the lubricating oil splashed from the rotating outer gear of the gear shaft 2 is intercepted by the oil reservoir plate 4 and collected in the groove to replenish the oil storage. The low surface energy properties of nylon and POM materials promote oil flow. The oil reservoir plate 4 covers the inner diameter of the outer ring of the bearing 3. Under the action of the bearing 3, the lubricating oil in the groove flows directly to the raceway and rollers, reducing the oil supply path, improving the timeliness of lubrication, and forming a stable oil film. Two bolts 5 are fixed along the symmetrical axis of the oil reservoir plate 4 to ensure that the oil reservoir plate 4 does not shift under vibration and high-speed rotation, always covering the outside of the bearing 3, and ensuring the stability of oil supply.
[0029] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" 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 application 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 application.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0031] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" 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. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0033] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0034] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An oil storage structure for a gearbox bearing, characterized in that, include: The housing is used for the fixed support of the gearbox, and the housing is provided with bearing seats and multiple threaded holes; A gear shaft is transversely inserted inside the housing; A bearing is fitted around the outer circumference of the gear shaft. The bearing includes an inner ring and an outer ring. The inner ring mates with the gear shaft, and the outer ring mates with the bearing seat hole of the housing. An oil reservoir plate is detachably mounted on the inner wall of the housing and covers the outer side of the bearing; Two bolts are spaced apart and pass through the oil reservoir plate. The shank of each bolt is fitted with a through hole in the oil reservoir plate with clearance, and the end is fastened to a pre-set threaded hole in the housing.
2. The oil reservoir structure for the gearbox bearing according to claim 1, characterized in that: The oil reservoir plate is in the shape of a semi-circular groove, the opening of the groove faces the bearing, and the width of the groove is adapted to the outer ring of the bearing.
3. The oil reservoir structure for the gearbox bearing according to claim 2, characterized in that: The oil reservoir plate is made of nylon or POM material.
4. The oil reservoir structure for the gearbox bearing according to claim 1, characterized in that: Sealant is applied between the mating surfaces of the oil reservoir plate and the housing.
5. The oil reservoir structure for the gearbox bearing according to claim 1, characterized in that: The height of the oil reservoir plate is higher than the inner diameter of the outer ring of the bearing.