Driving motor bearing outer ring anti-rotation structure, driving motor and vehicle
By adopting a locking pressure plate structure on the outer ring of the drive motor bearing, the problems of bearing outer ring wear and ablation are solved, a longer service life and stability are achieved, the design and processing process are simplified, and the cost is reduced.
Patent Information
- Application Number
- CN202422611987.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-28
AI Technical Summary
The outer ring of the existing drive motor bearing is prone to wear and burning during operation, resulting in abnormal noise and shortened service life of the vehicle. The existing anti-rotation structure design is complex and it is difficult to ensure the stability of the bearing outer ring.
Two locking pressure plates are used to directly lock the bearing outer ring through the cooperation of the limit plate and the fin-shaped guide structure, avoiding the use of steel sleeves and wave washers, simplifying the design and improving the anti-rotation effect.
It effectively prevents the outer ring of the bearing from rotating, reduces wear, extends service life, simplifies design and processing, reduces costs, and improves the operating stability of the entire vehicle.
Smart Images
Figure CN223428250U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a drive motor bearing outer ring anti-rotation structure, a drive motor and a vehicle. Background Art
[0002] As the use of new energy drive motors becomes increasingly widespread, drive motors cover various application scenarios such as buses, commercial passenger buses, commuter cars, two-wheeled motorcycles, etc. Bearings are one of the key components in drive motor design. Their reliability, environmental friendliness and service life are directly related to the customer experience of the product.
[0003] In motor design, the issue of anti-rotation of the bearing's outer ring is one of the factors that affects bearing reliability and service life. During motor operation, if the bearing is not protected, the internal balls will produce slight sliding friction with the outer ring, causing the outer ring to rotate with the shaft, causing wear on the outer ring and bearing housing, leading to abnormal product operation. During assembly, to avoid deformation of the bearing outer ring caused by interference fit, which affects bearing clearance, causes the oil film between the balls and the inner and outer rings to fail, and leads to bearing ablation, a small clearance fit is often used between the bearing housing and the bearing, which does not prevent the outer ring from rotating.
[0004] In view of this situation, the existing anti-rotation solution is to fix one end as the fixed end (see Figure 1 ), use the pressure plate to directly press the outer ring of the bearing, the other end is called the floating end because of the size deviation of the parts during processing, which leads to a slight difference in the position of the whole machine. Figure 2 To ensure operability during assembly / repair of the entire machine, the floating-end bearing often uses a steel sleeve + wave washer to accommodate axial dimensional deviations and facilitate anti-rotation during assembly and disassembly from one end. This structure first requires adding a steel sleeve to the bearing chamber to increase the hardness of the inner and bottom surfaces of the bearing chamber. The inner wall of the steel sleeve is used to align the bearing. Then, through the design of the assembly dimension chain, the outer ring of the bearing applies a certain force to the wave washer after assembly. Because the bottom surface of the bearing chamber steel sleeve supports the wave washer, when the dimensions are designed appropriately, the wave washer undergoes elastic deformation, causing the force to react on the outer ring of the bearing, thereby applying a preload force to the outer ring of the bearing to keep the bearing in a non-rotating state during operation.
[0005] However, when designing existing anti-rotation structures, it is necessary to further check the working height of the wave washers after the three-dimensional design is completed. The dimension chain is calculated based on the theoretical force curve of the wave washers and the empirical design of the bearing preload. Different dimension chains need to be designed for wave washers of different models and structures. When the working height of the wave washers is too high, the outer ring of the bearing will still rotate due to insufficient preload provided by the wave washers, which will still cause wear and ablation of the outer ring of the bearing. Long-term rotation will cause the bearing chamber to deform out of round, causing radial movement of the rotor, affecting the spline engagement between the motor and the reducer, affecting the spline life, and then causing abnormal noise in the vehicle and affecting the customer's riding experience. When the working height of the wave washers is designed to be too small, the unbalanced load on the bearing is large, which will aggravate the wear of the balls and the inner and outer rings during rolling, affecting the service life of the bearing. In the long run, it will also cause abnormal noise in the vehicle. Excessive preload will also cause plastic deformation of the wave washers, causing the wave washers to lose their preload function. At the same time, the force curve is the theoretical force value under ideal conditions. There are certain errors in the actual object due to material and process problems. The preload force of the bearing is accumulated through experience. Moreover, during operation, due to the axial movement of the rotor, the preload force of the wave washer on the bearing cannot be guaranteed to be within an ideal qualified range, and outer ring wear will still occur to a greater or lesser extent. Utility Model Content
[0006] The purpose of the utility model is to overcome the problem of outer ring wear caused by the rotation of the bearing outer ring in the prior art, and to provide an anti-rotation structure for the outer ring of the driving motor bearing. The anti-rotation structure for the outer ring of the driving motor bearing has strong versatility and a wide range of applications, reduces the difficulty of design and processing, and reduces costs.
[0007] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a drive motor bearing outer ring anti-rotation structure, which includes a first locking pressure plate and a second locking pressure plate which are sleeved on the shaft and arranged at both ends of the bearing, and the first locking pressure plate and the second locking pressure plate are configured to lock and fix the outer ring of the bearing to the bearing chamber on the front end cover; wherein,
[0008] The first locking pressure plate and the second locking pressure plate both extend outward to form at least one pair of limit plates, and corresponding positions on the bearing chamber are formed with limit grooves that can cooperate with the limit plates, and fin-shaped guide structures are formed between adjacent limit grooves, and the fin-shaped guide structures are configured to guide the limit plates to slide into the limit grooves.
[0009] Preferably, the end of the limiting plate is formed with a rounded corner.
[0010] Preferably, the surfaces of the fin-shaped guide structure that are in contact with the limiting plate are all formed with rounded corners.
[0011] Preferably, a threaded hole is provided on the limiting plate, and the first locking plate and the second locking plate can lock the outer ring of the bearing by screwing screws into the threaded holes on the first locking plate and the second locking plate in sequence.
[0012] Preferably, the depth of the limiting groove is greater than the sum of the thicknesses of the bearing, the first locking pressure plate, and the second locking pressure plate.
[0013] Preferably, a clearance dimension of 1 mm is formed in the axial direction of the bottom surface of the bearing chamber.
[0014] Preferably, the first locking pressure plate, the second locking pressure plate and the limiting plate are all integrally formed parts.
[0015] A second aspect of the present invention provides a drive motor, wherein the drive motor bearing outer ring anti-rotation structure as described above is installed on the bearing of the drive motor.
[0016] A third aspect of the present invention provides a vehicle, wherein the drive motor of the vehicle is equipped with the above-mentioned drive motor bearing outer ring anti-rotation structure.
[0017] According to the above technical solution, the bearing chamber of the front cover no longer requires an additional steel sleeve structure or a corrugated washer. Instead, two locking plates are used to lock the bearing outer ring. During installation, the limit plate on the locking plate contacts the fin-shaped guide structure provided on the bearing chamber, guiding the locking plate into the limit groove provided in the bearing chamber, thus completing the assembly. During operation, the locking plate, restricted by the limit groove, can effectively prevent the outer ring of the bearing from running around. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is the fixed end of the motor using the anti-rotation solution in the prior art;
[0019] Figure 2 It is the floating end of the motor using the anti-rotation solution in the prior art;
[0020] Figure 3 This is a schematic structural diagram of the anti-rotation structure of the outer ring of the driving motor bearing provided by the utility model;
[0021] Figure 4 This is a partial enlarged view of the front end cover of the anti-rotation structure of the outer ring of the driving motor bearing provided by the utility model;
[0022] Figure 5 It is a structural schematic diagram of the first locking pressure plate or the second locking pressure plate in the anti-rotation structure of the outer ring of the driving motor bearing provided by the utility model.
[0023] Description of Reference Numerals
[0024] 1-axis 2-first locking plate
[0025] 3-Screw 4-Bearing
[0026] 5-Second locking plate 6-Rounded corner
[0027] 7-front end cover 8-fin guide structure
[0028] 9-Limiting plate 10-Limiting slot DETAILED DESCRIPTION
[0029] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.
[0030] In the present invention, unless otherwise stated, directional words such as "top, bottom, inside, outside" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.
[0031] See also Figure 3 The utility model provides a drive motor bearing outer ring anti-rotation structure, which includes a first locking pressure plate 2 and a second locking pressure plate 5 which are sleeved on a shaft 1 and arranged at both ends of a bearing 4. The first locking pressure plate 2 and the second locking pressure plate 5 are configured to lock and fix the outer ring of the bearing 4 to the bearing chamber on the front end cover 7; wherein,
[0032] At least one pair of limit plates 9 are formed on the first locking pressure plate 2 and the second locking pressure plate 5 extending outward, and limit grooves 10 that can cooperate with the limit plates 9 are formed at corresponding positions on the bearing chamber, and fin-shaped guide structures 8 are formed between adjacent limit grooves 10, and the fin-shaped guide structures 8 are configured to guide the limit plates 9 to slide into the limit grooves 10.
[0033] With the above technical solution, no additional steel sleeve structure is added to the bearing chamber of the front end cover 7, and no wave washer is used. Instead, two locking pressure plates are used to lock the outer ring of the bearing 4. During the installation process, the limit plate 9 on the locking pressure plate contacts the fin-shaped guide structure 8 provided on the bearing chamber, and the locking pressure plate is guided to slide into the limit groove 10 provided in the bearing chamber (see FIG. Figure 4 During operation, the locking plate can effectively limit the running of the bearing outer ring due to the restriction of the limiting groove 10.
[0034] In this embodiment, in order to prevent the hard and sharp edges or corners of the limit plate 9 from cutting the operator's hands, or scratching or even cutting the surrounding parts during assembly or disassembly, it is preferred that Figure 5As shown, a rounded corner 6 is formed at the end of the limiting plate 9 .
[0035] When installing the locking pressure plate, the locking pressure plate will contact the edge of the fin-shaped guide structure 8 and slide along the fin-shaped guide structure 8 into the limiting groove 10 provided in the bearing chamber. During this process, in order to prevent the limiting plate 9 on the locking pressure plate from sliding unsmoothly on the fin-shaped guide structure 8, which would result in an unsmooth installation, preferably, the surface of the fin-shaped guide structure 8 that contacts the limiting plate 9 is formed with a rounded corner. In this way, the smoother rounded corner structure allows the limiting plate 9 on the locking pressure plate to be accurately and smoothly installed in place once it contacts the fin-shaped guide structure 8, along the guide direction of the fin-shaped guide structure 8. This eliminates the need for repeated adjustments and installations, effectively saving operation time.
[0036] The above-mentioned first locking pressure plate 2 and second locking pressure plate 5 need to be tightened and fixed after clamping the outer ring of the bearing 4. The connection and fixing method can be any common method in this field. However, from the perspective of optimizing the connection method and simplifying the operation requirements, in this embodiment, it is preferred to open a threaded hole on the limit plate 9, and the first locking pressure plate 2 and the second locking pressure plate 5 can be locked by screwing the screws 3 into the threaded holes on the first locking pressure plate 2 and the second locking pressure plate 5 in turn. The outer ring of the bearing 4 can be locked by the first locking pressure plate 2 and the second locking pressure plate 5.
[0037] Furthermore, when the bearing 4 is clamped and fastened using the first locking plate 2 and the second locking plate 5 and then installed in the bearing chamber, in order to prevent the depth of the limiting groove 10 from being too shallow, causing the first locking plate 2 or even the bearing 4 to be exposed from the limiting groove 10, the limiting groove 10 cannot provide sufficient restraining force, thereby causing the original anti-rotation structure to lose its anti-rotation function and fail to achieve the ideal anti-rotation effect, the depth of the limiting groove 10 is preferably greater than the sum of the thicknesses of the bearing 4 and the first locking plate 2 and the second locking plate 5. In this way, the structure formed by clamping and fastening the bearing 4 using the first locking plate 2 and the second locking plate 5 can be completely confined and constrained in the limiting groove 10, achieving a better anti-rotation effect.
[0038] At the same time, in order to ensure that there is no interference during installation, it is preferred that a 1 mm clearance dimension be formed in the axial direction of the bottom surface of the bearing chamber when designing the axial dimension.
[0039] Furthermore, in order to improve the overall consistency of the locking pressure plate and the limit plate 9 and ensure the overall integrity of the locking pressure plate and the limit plate 9 after long-term use, preferably, the first locking pressure plate 2 and the second locking pressure plate 5 and the limit plate 9 are all integrally formed parts.
[0040] As can be seen, compared to existing solutions, the drive motor bearing outer ring anti-rotation structure provided by this utility model only requires conventional design dimension chain verification, eliminating the need to design working height dimension chains for different types of wave washers, reducing the labor costs of wave washer selection in the early design stage and subsequent verification. Furthermore, this drive motor bearing outer ring anti-rotation structure eliminates the existing bearing housing steel sleeve design, reducing the related processes in the early stage machining and later stage mold opening of the component, thereby reducing the cost and processing difficulty of the component.
[0041] In response to the problem that the outer ring of the existing drive motor bearing rotates with the shaft, causing wear on the outer ring and bearing chamber, leading to abnormal motor operation, the second aspect of the present invention provides a drive motor having the aforementioned drive motor bearing outer ring anti-rotation structure installed on its bearing. A drive motor employing this drive motor bearing outer ring anti-rotation structure is less susceptible to wear on the bearing outer ring and bearing chamber, resulting in better operating performance and a longer service life.
[0042] Furthermore, in response to the problem of existing vehicles' drive motors being susceptible to wear on the outer rings and bearing housings of their bearings, the third aspect of the present invention provides a vehicle equipped with the aforementioned drive motor bearing outer ring anti-rotation structure. This structure significantly reduces the frequency of component repairs and replacements, saving vehicle operating and maintenance costs.
[0043] While the preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple variations and combinations should also be considered as disclosed in the present invention and fall within the scope of protection of the present invention.
Claims
1. A drive motor bearing outer ring anti-rotation structure, characterized in that: The drive motor bearing outer ring anti-rotation structure comprises a first locking pressure plate (2) and a second locking pressure plate (5) which are sleeved on the shaft (1) and arranged at both ends of the bearing (4), wherein the first locking pressure plate (2) and the second locking pressure plate (5) are configured to lock and fix the outer ring of the bearing (4) to the bearing chamber on the front end cover (7); wherein, At least one pair of limit plates (9) are formed on the first locking pressure plate (2) and the second locking pressure plate (5) extending outward, and corresponding positions on the bearing chamber are formed with limit grooves (10) that can cooperate with the limit plates (9), and fin-shaped guide structures (8) are formed between adjacent limit grooves (10), and the fin-shaped guide structures (8) are configured to guide the limit plates (9) to slide into the limit grooves (10).
2. The drive motor bearing outer ring anti-rotation structure according to claim 1, characterized in that: The end of the limiting plate (9) is formed with a rounded corner (6).
3. The drive motor bearing outer ring anti-rotation structure according to claim 2, characterized in that: The surfaces of the fin-shaped guide structure (8) that are in contact with the limiting plate (9) are all formed with rounded corners.
4. The drive motor bearing outer ring anti-rotation structure according to claim 1, characterized in that: The limiting plate (9) is provided with a threaded hole, and the first locking pressure plate (2) and the second locking pressure plate (5) are screwed into the threaded holes in sequence by screws (3), so that the first locking pressure plate (2) and the second locking pressure plate (5) can lock the outer ring of the bearing (4).
5. The drive motor bearing outer ring anti-rotation structure according to claim 1, characterized in that: The depth of the limiting groove (10) is greater than the sum of the thicknesses of the bearing (4), the first locking pressure plate (2), and the second locking pressure plate (5).
6. The drive motor bearing outer ring anti-rotation structure according to claim 1, characterized in that: A clearance dimension of 1 mm is formed in the axial direction of the bottom surface of the bearing chamber.
7. The drive motor bearing outer ring anti-rotation structure according to claim 1, characterized in that: The first locking pressure plate (2), the second locking pressure plate (5) and the limiting plate (9) are all integrally formed parts.
8. A driving motor, characterized in that: The driving motor bearing outer ring anti-rotation structure according to any one of claims 1 to 7 is installed on the driving motor bearing.
9. A vehicle, characterized in that: The driving motor of the vehicle is equipped with a driving motor bearing outer ring anti-rotation structure as described in any one of claims 1 to 7.