Deep groove ball contact bearing for new energy gearbox
By improving the inner ring groove design of deep groove ball contact bearings and using nylon cages, the problems of high speed and large load in bearings of new energy vehicle transmissions have been solved, achieving high load capacity and long service life of bearings.
Patent Information
- Application Number
- CN202520428631.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing deep groove ball contact bearings cannot meet the requirements of high speed and large load in the transmission of new energy vehicles, especially in terms of axial and radial loads.
An asymmetric inner ring groove and mounting ramp structure were designed to increase the number of deep groove ball bearings, and a nylon cage was used to improve the bearing's load-bearing capacity and lifespan.
Without changing the external dimensions, the bearing's load-bearing capacity is significantly improved, its axial and radial load capacity is enhanced, and its lifespan is increased by approximately 70%, meeting higher speed and load requirements.
Smart Images
Figure CN223725186U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy gearbox inside bearing manufacturing field, concretely relates to a deep groove ball touch bearing for new energy gearbox. BACKGROUND
[0002] The actual function of the new energy automobile gearbox is mainly to transmit the rotating speed and torque of the engine or driving motor to the wheels, so as to realize the driving of the vehicle at different speeds, and the stability and reliability are the key elements affecting the performance of the automobile.
[0003] The bearing in the gearbox drive system needs to bear the load generated by the gear meshing when working, and these loads are mainly radial load and axial load. The deep groove ball touch bearing is one of the main bearing types in the gearbox, and compared with the roller bearing, it can meet the higher use speed requirement.
[0004] However, due to its own structure, the deep groove ball touch bearing can only bear radial load and small axial load.
[0005] In the actual design process, due to the limitation of space, the bearing needs to bear a larger load while the bearing size remains unchanged, but the deep groove ball touch bearing with the internal structure as shown in the figure cannot meet this requirement, so the bearing must be redesigned to meet the performance requirements of the gearbox bearing. Figure 1
[0006] In the new energy automobile gearbox, each shaft needs two bearings to support and position, usually adopting the cross positioning method and using the gasket pre-tightening method. Since the size transmission adopts helical gears, each bearing needs to bear the axial load in one direction. CONTENT OF THE UTILITY MODEL
[0007] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a deep groove ball touch bearing for new energy gearbox. The bearing design is carried out to meet the requirements of high speed, high load and long life of the bearing in actual working conditions. In order to overcome the defects that the existing bearing speed cannot meet the requirements, the axial bearing capacity is not enough, and the radial bearing capacity is not enough.
[0008] In order to realize the purpose of the utility model, the technical scheme adopted is:
[0009] A deep groove ball touch bearing for new energy gearbox, comprising:
[0010] A bearing inner ring structure, the inner ring raceway of the bearing inner ring structure is asymmetrically designed along the axis, a first inner ring raceway in the form of a circular arc is arranged on one side of the axis of the inner ring raceway, and a mounting ramp descending towards the boundary is arranged on the other side of the axis of the inner ring raceway, the first inner ring raceway is connected with the mounting ramp;
[0011] A plurality of deep groove ball steel balls are arranged between the bearing inner ring structure and the bearing outer ring structure through a retainer;
[0012] The number of the deep groove ball steel balls ranges from 10 to 13.
[0013] The retainer is a nylon retainer.
[0014] In an optimal embodiment of the present application, the number of the deep groove ball steel balls is 13.
[0015] In an optimal embodiment of the present application, the nylon retainer is a PA46-GF30 nylon retainer or a PA46-CF30 nylon retainer.
[0016] In an optimal embodiment of the present application, the bearing inner ring structure is made of bearing steel.
[0017] In an optimal embodiment of the present application, the bearing outer ring structure is made of bearing steel.
[0018] The present application has the following advantages:
[0019] Compared with the prior art, the present application greatly improves the bearing capacity of the bearing without changing the outer size, thereby meeting the requirements of higher bearing rotational speed, axial bearing capacity and radial bearing capacity of the product.
[0020] The service life of the deep groove ball contact bearing for new energy transmission boxes can be improved by about 70% under the same working conditions. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of the prior art.
[0022] Figure 2 It is a schematic diagram of the overall structure of the present application.
[0023] Figure 3 It is a schematic diagram of the local structure of the present application. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below through the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, in the following structure, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0025] In the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, "first", "second" are for the purpose of description only and cannot be understood as indicating or implying relative importance.
[0026] As shown in Figure 2 Or Figure 3 A deep groove ball contact bearing for a new energy gearbox, the deep groove ball contact bearing is a non-separable structure. It includes an improved bearing inner ring structure 10, the inner ring groove 11 of the bearing inner ring structure 10 is asymmetrically designed along the axis, specifically, the first inner ring groove 111 is arranged on one side of the axis of the inner ring groove 11, and the mounting ramp 112 descending towards the boundary is arranged on the other side of the axis of the inner ring groove 11, and the first inner ring groove 111 is connected with the mounting ramp 112.
[0027] The mounting ramp 112 is used for facilitating the assembly of the deep groove ball 40 and is integrally formed with the first inner ring groove 111.
[0028] A plurality of deep groove balls 40 are arranged between the bearing inner ring structure 10 and the bearing outer ring structure 20 through the retainer 30.
[0029] Compared with the prior art, the number of deep groove balls 40 ranges from 10 to 13, and the number of deep groove balls in the embodiment is 13. However, the prior art only has 10. The diameter of the deep groove ball 40 is 11.906mm.
[0030] In order to meet the requirement of higher speed, the retainer 30 is a nylon retainer, and specifically the nylon retainer is a PA46-GF30 nylon retainer or a PA46-CF30 nylon retainer.
[0031] Such a setting is to meet the strength and rigidity requirements, and the nylon retainer has a self-lubricating function, which reduces the friction between the steel ball and the retainer hole when rotating at high speed, thereby reducing the heating of the bearing.
[0032] The bearing inner ring structure 10 and the bearing outer ring structure 20 are made of bearing steel, thereby improving bearing carrying capacity.
[0033] The deep groove ball contact bearing for the new energy gearbox has a rated dynamic load of 35.8kN; according to the ISO calculation method, the rated dynamic load is increased by 19.3% compared with the original design bearing.
[0034] The deep groove ball contact bearing for the new energy gearbox has a rated static load of 26.3kN; according to the ISO calculation method, the rated static load is increased by 29.6% compared with the original design bearing.
[0035] The deep groove ball contact bearing for the new energy gearbox has a maximum axial load of 37kN; according to the bearing internal structure parameter calculation, the maximum axial load is increased by 209% compared with the original design bearing.
[0036] The deep groove ball contact bearing for the new energy gearbox has a service life, according to the ISO 281 service life calculation theory, under the same working condition, the service life can be increased by about 70%.
[0037] According to the above structural characteristics, compared with the prior art, the bearing carrying capacity is greatly improved without changing the size, thereby meeting the requirements of higher bearing rotational speed, axial carrying capacity and radial carrying capacity of the product.
[0038] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model.
[0039] Those skilled in the art should understand that the utility model is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model. These changes and improvements all fall within the scope of the claimed utility model, and the scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A deep groove ball contact bearing for a new energy gearbox, characterized in that, Comprise: A bearing inner ring structure, the inner ring channel of the bearing inner ring structure is an asymmetric design along the axis, a first inner ring channel in the form of a circular arc is arranged on one side of the axis of the inner ring channel, an installation ramp descending towards the boundary is arranged on the other side of the axis of the inner ring channel, and the first inner ring channel is connected with the installation ramp; A plurality of deep groove ball steel balls are arranged between the bearing inner ring structure and the bearing outer ring structure through a retainer; The number of the deep groove ball steel balls ranges from 10 to 13. The retainer is a nylon retainer.
2. A deep groove ball contact bearing for a new energy transmission gearbox as claimed in claim 1, characterized in that, The number of the deep groove ball steel balls is 13.
3. A deep groove ball contact bearing for a new energy transmission gearbox as claimed in claim 1, characterized in that, The nylon retainer is a PA46-GF30 nylon retainer or a PA46-CF30 nylon retainer.
4. A deep groove ball contact bearing for a new energy transmission gearbox as claimed in claim 1, characterized in that, The bearing inner ring structure is made of bearing steel.
5. A deep groove ball contact bearing for a new energy transmission gearbox as claimed in claim 1, characterized in that, The bearing outer ring structure is made of bearing steel.