Integrated bearing rotor cup structure
By adopting an integrated bearing rotor cup structure in the motor bearing structure and using the large-diameter segment annular groove of the shaft to replace the bearing inner ring, the problem of insufficient accuracy and stability of the traditional motor bearing structure is solved, and higher operating accuracy and stability are achieved.
Patent Information
- Application Number
- CN202421229029.2
- 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
Traditional motor bearing structures are difficult to ensure high accuracy and high stability, especially in vehicle-mounted lidar systems, where there are problems of low coaxiality and complex assembly.
An integrated bearing rotor cup structure is adopted, in which an annular groove is provided on the large diameter section of the shaft, which plays the role of the inner ring of the bearing, simplifies the bearing structure, eliminates the excess inner ring and outer ring of the bearing, and reduces the assembly steps.
It improves the operating accuracy and stability of the motor, simplifies the assembly process, avoids the problems of low coaxiality and gasket settings, and meets the requirements of high precision and high stability.
Smart Images
Figure CN222563642U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to an integrated bearing rotor cup structure. Background Art
[0002] The automotive LiDAR system is increasingly being used. The system is complex and precise, so the accuracy and stability requirements for the motor are more stringent. The rotating part of the motor requires bearings for support and transmission. Figure 1 As shown, the traditional technical solution mainly uses two bearing sleeves 92 on the shaft 91, the inner ring of the bearing is pressed or glued to the motor main shaft, and the outer ring of the bearing is pressed or glued to the rotor cup 93. However, it is difficult to ensure high coaxiality between the two bearings; in addition, a gasket 99 needs to be arranged between the two bearings, which not only increases the assembly steps, but also reduces the coaxiality between the bearings. It can be seen that the traditional technical solution is difficult to meet the requirements of high precision and high stability of the motor. In view of the above technical problems, the utility model proposes a new technical solution, which can improve the stability of the motor, ensure the operating performance and precision of the motor, and meet its reliable application in the laser radar system. Utility Model Content
[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an integrated bearing rotor cup structure, aiming to solve the technical problem in the prior art that the operating performance and accuracy of the motor need to be improved.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] An integrated bearing rotor cup structure comprises a shaft, a bearing, and a rotor cup, wherein the shaft comprises a small diameter section and a large diameter section, and the large diameter section is provided with an annular groove; the bearing comprises a bearing outer ring, a bearing inner ring, an upper row of rollers, and a lower row of rollers; the upper row of rollers is located between the bearing outer ring and the bearing inner ring, and the lower row of rollers is located between the bearing outer ring and the annular groove; the bearing inner ring is sleeved on the small diameter section of the shaft.
[0006] Furthermore, in the integrated bearing rotor cup structure, there is a gap between the lower surface of the bearing inner ring and the upper surface of the large diameter section.
[0007] Furthermore, in the integrated bearing rotor cup structure, the gap between the lower surface of the bearing inner ring and the upper surface of the large diameter section ranges from 0.1 to 0.2 mm.
[0008] Furthermore, in the integrated bearing rotor cup structure, the upper rollers and the lower rollers are both balls.
[0009] Furthermore, in the integrated bearing rotor cup structure, the rotor cup includes a first section, a second section and a third section connected in sequence; the first section of the rotor cup is provided with a through hole, and the bearing outer ring is arranged in the through hole of the first section of the rotor cup.
[0010] Furthermore, in the integrated bearing rotor cup structure, a plurality of mounting holes are provided on the second section of the rotor cup.
[0011] Furthermore, in the integrated bearing rotor cup structure, a third section of the rotor cup is provided with a plurality of balancing holes.
[0012] Beneficial effects: The utility model provides an integrated bearing rotor cup structure. Compared with the prior art, the large diameter section of the shaft is provided with an annular groove, which plays the role of the inner ring of the bearing. Therefore, there is no need to provide an inner ring of the bearing for the lower rollers, and an integrated structure is formed between the shaft and the bearing. In addition, the upper rollers and the lower rollers share an outer ring, which makes the bearing have only one outer ring and one inner ring, which not only simplifies the assembly process, but also eliminates the problem of setting a gasket between the two bearings and the problem of low coaxiality between the two bearings, thereby improving the accuracy and stability of the motor during operation, and can meet the application scenarios with strict precision requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the bearing rotor cup structure in the prior art.
[0014] Figure 2 The three-dimensional structure of the integrated bearing rotor cup provided by the present invention Figure 1 .
[0015] Figure 3 The three-dimensional structure of the integrated bearing rotor cup provided by the present invention Figure 2 .
[0016] Figure 4 A top view of the integrated bearing rotor cup structure provided by the present invention.
[0017] Figure 5 for Figure 4 Middle AA section view.
[0018] Figure 6 for Figure 5 A partial enlarged view of the middle S region.
[0019] Figure 7 A three-dimensional diagram of the central axis of the integrated bearing rotor cup structure provided by the present invention. DETAILED DESCRIPTION
[0020] The utility model provides an integrated bearing rotor cup structure. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0021] See also Figures 2 to 7 The utility model provides an integrated bearing rotor cup structure. The drawings are only used to explain the structural principle and are not proportional to the actual product. The drawings only depict structures related to the invention of this application, and some conventional structures are not specifically depicted. Figure 5 The section lines of the upper and lower rollers are not drawn.
[0022] The terms "first", "second", etc. described herein are merely different names for similar structures for the convenience of explanation and are not intended to limit the present application. For the convenience of explanation, some directional words are inevitably used herein, but these directional words are not intended to limit the present application, because they can be set to different directions in actual applications. The "several" described herein refers to an indefinite number, because the number of structures referred to is not an inventive point, and therefore is not specifically limited.
[0023] The integrated bearing rotor cup structure includes a shaft 1, a bearing 2, and a rotor cup 3. The shaft 1 includes a small diameter section 11 and a large diameter section 12, and the large diameter section is provided with an annular groove 101; the bearing includes a bearing outer ring 21, a bearing inner ring 22, an upper row of rollers 23, and a lower row of rollers 24; the upper row of rollers is located between the bearing outer ring 21 and the bearing inner ring 22, and the lower row of rollers is located between the bearing outer ring 21 and the annular groove 101; the bearing inner ring is sleeved on the small diameter section of the shaft.
[0024] like Figure 6 As shown, further, there is a gap H between the lower surface of the bearing inner ring and the upper surface of the large diameter section. That is, the bearing inner ring and the small diameter section of the shaft are connected by a sliding fit. The significance of this arrangement is that when a preload is applied above the bearing inner ring, the gap can be used to eliminate the internal clearance of the bearing, so that the bearing performance is optimized.
[0025] Preferably, the gap H between the lower surface of the bearing inner ring and the upper surface of the large diameter section is in the range of 0.1 to 0.2 mm.
[0026] Preferably, the upper rollers 23 and the lower rollers 24 are all balls. That is, the rollers, inner ring, and outer ring of the bearing are similar to those of a deep groove ball bearing, and have good performance in bearing radial loads and axial loads.
[0027] Furthermore, the rotor cup 3 includes a first section 31, a second section 32 and a third section 33 connected in sequence; the first section of the rotor cup is provided with a through hole (not marked in the figure), and the outer ring of the bearing is provided in the through hole of the first section of the rotor cup. In practical applications, the outer ring of the bearing and the rotor cup are matched by shrink fitting.
[0028] Furthermore, the second section of the rotor cup is provided with a plurality of mounting holes 302. The mounting holes are used to connect with other related components of the motor.
[0029] Furthermore, the third section of the rotor cup is provided with a plurality of balancing holes 303. Providing the balancing holes is beneficial to improving the dynamic balance of the integrated bearing rotor cup structure during operation.
[0030] From the above analysis, it can be seen that since the annular groove of the large diameter section plays the role of the inner ring of the bearing, there is no need to set up the inner ring of the bearing for the following rollers, and the shaft and the bearing form an integrated structure. Since there is only one outer ring and one inner ring of the bearing, it not only simplifies the assembly process, but also eliminates the problem of setting a gasket between the two bearings and the problem of low coaxiality between the two bearings, thereby improving the accuracy and stability of the motor during operation, and can meet application scenarios with strict precision requirements (for example, the motor of the vehicle-mounted laser radar system).
[0031] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.
Claims
1. An integrated bearing rotor cup structure, comprising a shaft, a bearing, and a rotor cup, characterized in that: The shaft comprises a small diameter section and a large diameter section, and the large diameter section is provided with an annular groove; the bearing comprises a bearing outer ring, a bearing inner ring, an upper row of rollers and a lower row of rollers; the upper row of rollers is located between the bearing outer ring and the bearing inner ring, and the lower row of rollers is located between the bearing outer ring and the annular groove; the bearing inner ring is sleeved on the small diameter section of the shaft.
2. The integrated bearing rotor cup structure according to claim 1, characterized in that: There is a gap between the lower surface of the bearing inner ring and the upper surface of the large diameter section.
3. The integrated bearing rotor cup structure according to claim 2, characterized in that: The clearance between the lower surface of the bearing inner ring and the upper surface of the large diameter section ranges from 0.1 to 0.2 mm.
4. The integrated bearing rotor cup structure according to claim 1, characterized in that: The upper rollers and the lower rollers are all balls.
5. The integrated bearing rotor cup structure according to claim 1, characterized in that: The rotor cup comprises a first section, a second section and a third section which are connected in sequence; the first section of the rotor cup is provided with a through hole, and the outer ring of the bearing is arranged in the through hole of the first section of the rotor cup.
6. The integrated bearing rotor cup structure according to claim 5, characterized in that: The second section of the rotor cup is provided with a plurality of mounting holes.
7. The integrated bearing rotor cup structure according to claim 5, characterized in that: The third section of the rotor cup is provided with a plurality of balancing holes.