Bearing and pressing plate connecting structure
By designing the step surface and ring groove structure on the outer ring and pressure plate of the reducer bearing, the connection process between the bearing and the pressure plate is simplified, the reliability and production cost of the traditional structure are solved, and an efficient and reliable assembly process is achieved.
Patent Information
- Application Number
- CN202421230644.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The locking structure of traditional reducer bearings has poor reliability, complex processing and high production costs, cumbersome assembly processes and low efficiency.
The bearing outer ring and a triangular press plate with step surface are adopted. By providing a first ring groove and a second ring groove on the outer ring of the bearing, the clamping spring is stuck in these grooves, and the press plate is pressed on the outer ring of the bearing, simplifying the processing technology and assembly process.
It improves the reliability of bearing locking, simplifies the processing and assembly process, reduces production costs, and improves assembly efficiency.
Smart Images
Figure CN222559016U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of speed reducers for new energy vehicles, and relates to a connection structure between a bearing and a pressure plate in a speed reducer, in particular to a connection structure between a bearing and a pressure plate. Background Art
[0002] Bearings are important parts in mechanical transmission. When bearings are used in high temperature, closed and complex environments, the reliability of bearings is particularly important. The locking structure of traditional bearings is to install a retaining ring in the retaining groove of the outer ring of the bearing, and the retaining ring is used to lock the bearing. However, the ring wall of the retaining ring is generally thin. When the axial force is large, the retaining ring is easy to break at the bottom of the retaining groove, which has poor reliability and increases maintenance costs.
[0003] The transmission shaft in the reducer is supported by the bearing and the housing, and the bearing is generally positioned on the housing by a pressure plate. The conventional connection method between the bearing and the pressure plate is to set an irregularly shaped retaining ring between the bearing and the pressure plate, and the retaining ring is sleeved on the outer ring of the bearing, and the outer wall of the retaining ring is provided with three convex bumps, each of which is inserted into a corresponding pit set on the inner wall of the pressure plate.
[0004] The shortcomings of the above structure are:
[0005] 1) The shape of the circlip is irregular, and there are three complex convex humps on the circlip. On the one hand, it is difficult to process and manufacture. On the other hand, the protrusion of the humps must be strictly controlled. Too much protrusion will increase the difficulty of installing the circlip and the pressure plate. If the protrusion is too small, the reliability of the pressure plate installation is poor and there is a risk of falling off;
[0006] 2) There are three pits with complex shapes on the inner wall of the pressing plate, which requires complicated processing and will increase production costs;
[0007] 3) There are many assembly processes between the pressure plate and the bearing, the assembly operation is relatively complicated, and the assembly efficiency is low. Summary of the invention
[0008] The purpose of the utility model is to provide a bearing with a pressure plate for a new energy vehicle reducer which is easy to assemble and has good reliability.
[0009] The technical solution of the utility model is: a bearing and pressure plate connection structure, including a bearing, a retaining spring and a pressure plate, characterized in that: the pressure plate is provided with a through hole matching the outer ring of the bearing, and the pressure plate is pressed onto the outer ring of the bearing; a first ring groove and a second ring groove matching are provided between the outer ring of the bearing and the pressure plate; the retaining spring is clamped in the first ring groove and the second ring groove.
[0010] The outer ring of the bearing described in the technical solution of the utility model is provided with a step surface; the pressure plate is press-fitted on the step surface of the outer ring of the bearing.
[0011] The retaining spring described in the technical solution of the utility model is a polygonal structure with an opening.
[0012] The retaining spring described in the technical solution of the utility model is a nine-sided structure with an opening, and is easy to process and shape.
[0013] The inscribed circle of the clamping spring described in the technical solution of the utility model contacts the first annular groove, and the circumscribed circle of the clamping spring contacts the second annular groove.
[0014] The retaining spring described in the technical solution of the utility model is made of 65Mn, which is convenient for material selection, conducive to processing and manufacturing, and the retaining spring has sufficient elasticity.
[0015] The opening width of the clamping spring described in the technical solution of the utility model is 3-7 mm.
[0016] The pressing plate described in the technical solution of the utility model is made of 16MnCr5, which is easy to process and has good toughness and ductility, which can reduce material costs and is conducive to press-fitting.
[0017] The pressing plate described in the technical solution of the utility model has a triangular shape, and mounting holes are arranged at three corners.
[0018] The utility model produces the following positive effects:
[0019] 1) The shape of the circlip is regular and easy to process;
[0020] 2) The positions for the circlip assembly on the outer ring of the bearing and the pressure plate are both ring grooves, which has simple processing technology and low production cost;
[0021] 3) The assembly of the pressure plate, the retaining ring and the bearing can be realized through one-time press-fitting, with fewer assembly processes and simple installation operations, which can greatly improve the assembly efficiency;
[0022] 4) After being assembled in place, the connection between the pressure plate and the bearing is reliable, and the retaining spring acts as an axial limit to prevent the pressure plate from falling off the bearing; at the same time, the pressure plate can rotate circumferentially relative to the bearing to facilitate the alignment of the pressure plate and the mounting hole on the reducer housing.
[0023] The utility model has the characteristics of simple structure, high bearing locking reliability, easy processing and manufacturing, assembly can be achieved by one-time press-fitting and greatly reduced production costs. It is mainly used for connecting the bearing and the pressure plate in the reducer of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a structural schematic diagram of the utility model.
[0025] Figure 2 yes Figure 1AA section enlarged view.
[0026] Figure 3 yes Figure 2 Enlarged view of part B.
[0027] Figure 4 It is a structural diagram of the circlip.
[0028] Figure numbers: 1-bearing; 2-circlip; 3-pressure plate; 1a-first ring groove; 3a-second ring groove. DETAILED DESCRIPTION
[0029] The utility model is further described below in conjunction with the accompanying drawings.
[0030] like Figures 1 to 4 The utility model is composed of a bearing 1, a retaining ring 2 and a pressure plate 3.
[0031] The bearing 1 is a bearing in an existing new energy vehicle reducer. The outer ring of the bearing 1 is made of bearing steel. A step surface is formed on the outer wall of the outer ring of the bearing 1. The step surface has a first annular groove 1a. The first annular groove 1a is formed on the step surface of the bearing 1, and the processing technology is simple and the production cost is low.
[0032] The circlip 2 is made of 65Mn and has a cross section as follows: Figure 4 The 9-sided circlip 2 shown has an opening with a width of 3 to 7 mm. The circlip 2 has a regular shape, is easy to select materials, is conducive to processing and manufacturing, and has sufficient elasticity.
[0033] The pressing plate 3 is made of 16MnCr5 and has a triangular shape. It has mounting holes at three corners, a through hole in the middle that matches the stepped surface of the outer ring of the bearing 1, and a second annular groove 3a on the inner wall of the through hole. The pressing plate 3 is easy to process and has good toughness and ductility, which can reduce material costs and facilitate press-fitting.
[0034] The assembly of the pressure plate 3, the retaining spring 2 and the bearing 1 can be realized by a single press fit. The inscribed circle of the retaining spring 2 contacts the first annular groove 1a opened on the outer wall of the outer ring of the bearing 1, and the circumscribed circle of the retaining spring 2 contacts the second annular groove 3a on the inner wall of the pressure plate 3. The retaining spring 2 is clamped in the first annular groove 1a and the second annular groove 3a. The assembly process is small and the installation operation is simple, which can greatly improve the assembly efficiency. After being assembled in place, the pressure plate 3 and the bearing 1 are reliably connected, and the retaining spring 2 plays the role of axial limiting to prevent the pressure plate 3 from falling off the bearing 1; at the same time, the pressure plate 3 can rotate circumferentially relative to the bearing 1, so that the pressure plate 3 and the mounting hole on the reducer housing are aligned.
[0035] The utility model has a simple structure. By adding a pressure plate 3 on the outer ring of the bearing 1 to bear the axial force during locking, the reliability of the bearing locking is greatly improved. The utility model is easy to process and manufacture. It can be assembled by a one-time press fitting. The assembly operation is convenient and efficient. Not only is the connection reliability good, but the production cost can also be greatly reduced.
[0036] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention and without violating the purpose and claims of the present invention, ordinary technicians in this field can make a variety of similar expressions, such as changing the shape or material of the pressure plate or the retaining ring, or changing the type of bearing, etc. Such changes all fall within the scope of protection of the present invention.
Claims
1. A bearing and pressure plate connection structure, comprising a bearing (1), a retaining spring (2) and a pressure plate (3), characterized in that: The pressure plate (3) is provided with a through hole that matches with the outer ring of the bearing (1), and the pressure plate (3) is pressed onto the outer ring of the bearing (1); a first ring groove (1a) and a second ring groove (3a) that match are provided between the outer ring of the bearing (1) and the pressure plate (3); and the retaining ring (2) is retained in the first ring groove (1a) and the second ring groove (3a).
2. The bearing and pressure plate connection structure according to claim 1 is characterized in that: The outer ring of the bearing (1) is provided with a step surface; the pressure plate (3) is press-fitted onto the step surface of the outer ring of the bearing (1).
3. A bearing and pressure plate connection structure according to claim 1 or 2, characterized in that: The retaining spring (2) is a polygonal structure with an opening.
4. The bearing and pressure plate connection structure according to claim 3 is characterized in that: The clamping spring (2) is a 9-sided structure with an opening.
5. The bearing and pressure plate connection structure according to claim 4 is characterized in that: The inscribed circle of the clamping spring (2) contacts the first annular groove (1a), and the circumscribed circle of the clamping spring (2) contacts the second annular groove (3a).
6. A bearing and pressure plate connection structure according to any one of claims 1-2, 4-5, characterized in that: The retaining ring (2) is made of 65Mn.
7. A bearing and pressure plate connection structure according to claim 4 or 5, characterized in that: The opening width of the clamping spring (2) is 3-7 mm.
8. The bearing and pressure plate connection structure according to claim 6, characterized in that: The opening width of the clamping spring (2) is 3-7 mm.
9. A bearing and pressure plate connection structure according to any one of claims 1-2, 4-5, and 8, characterized in that: The pressing plate (3) is made of 16MnCr5.
10. The bearing and pressure plate connection structure according to claim 9, characterized in that: The pressing plate (3) is triangular in shape, and is provided with mounting holes at three corners.