Motor with function of preventing bearing from running
By incorporating grooves and roller structures on the outer ring of the bearing, the problem of bearing race slippage in drive motors is solved, ensuring bearing stability and axial float, thereby achieving stable operation of the motor system and cost advantages.
Patent Information
- Application Number
- CN202423083763.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In existing drive motors, the outer ring of the bearing is prone to running out of control because it is floating in both the circumferential and axial directions. This can lead to abnormal NVH noise and insulation failure. Furthermore, existing methods for suppressing this running out of control affect the accuracy and stability of the axial movement.
Grooves and an outer cover plate are provided on the outer ring of the bearing. Rollers are embedded in the grooves, and the outer cover plate is fixed to the end cap by bolts. The interference between the rollers and the grooves restricts circumferential movement, while the bearing is axially movable, ensuring the stability and axial floating of the bearing.
It effectively prevents bearing misalignment, maintains the axial floating function of the bearing, ensures the stability and accuracy of the motor system, and has a simple structure and low cost.
Smart Images
Figure CN223540370U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of drive motor structure technology, and in particular relates to a motor with a function to prevent bearing slippage. Background Technology
[0002] The drive motor rotor is supported by bearings at both ends. Usually, one bearing is fixed and the other is floating. During use, the floating bearing may run out of its race. This running out of the race can cause abnormal NVH noise in the system, and the iron powder generated by the running out of the race can even lead to serious problems such as insulation failure of the system.
[0003] In current drive motor structures, the outer ring of the bearing needs to be in a floating state. However, since the current bearing structure is floating in both the axial and circumferential directions, this leads to circumferential runaway of the outer ring. The mainstream solution to this problem is to install O-rings on the outside of the bearing. However, this method can only suppress runaway, not completely solve it. Moreover, this method has significant drawbacks in drive motors: the friction of the O-ring in the axial direction severely affects the accuracy and stability of the axial floating, and in severe cases, it can cause the bearing to lose its floating function. Utility Model Content
[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a motor with a function to prevent bearing slippage. The motor bearing is easy to install and does not affect the axial floating of the bearing while preventing bearing slippage.
[0005] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:
[0006] An electric motor with a function to prevent bearing race slippage includes a housing, a stator assembly, a shaft, and a rotor core. The stator assembly is fixed to the inner wall of the housing, and the rotor core is fixed to the shaft. The shaft is rotatably connected to the housing. At least one end of the housing is provided with an end cover. The end cover has a bearing mounting groove, and a bearing is provided in the bearing mounting groove. An outer bearing cover plate is also fixed to the end cover. The outer bearing cover plate is annular, and multiple rollers are evenly spaced on its inner sidewall. The outer sidewall of the bearing has corresponding grooves. At least a portion of the bearing is exposed in the bearing mounting groove. The outer bearing cover plate is fitted onto the bearing, such that the rollers are embedded in the grooves. The inner ring of the bearing is interference-fitted with the shaft.
[0007] As a preferred embodiment, the groove extends along the axial direction of the bearing through the outer sidewall of the bearing.
[0008] As a preferred embodiment, multiple connecting strips are provided at equal intervals on the outer side of the bearing outer cover plate, and the connecting strips are provided with through holes to facilitate the bolts to pass through. The bearing outer cover plate is fixed to the end cover by bolts.
[0009] As a preferred embodiment, a wave spring is also provided between the bearing and the bottom of the bearing mounting groove.
[0010] As a preferred embodiment, one end of the housing is a front cover, and a protruding ring is provided on one side of the front cover. The protruding ring is inserted and fixed to one end of the housing. A bearing A is provided inside the front cover.
[0011] As a preferred embodiment, the other end of the housing is a rear end cover, and a protruding ring is also provided on one side of the rear end cover. The protruding ring is inserted and fixed to the other end of the housing. A bearing B is provided inside the rear end cover.
[0012] As a preferred embodiment, the rotating shaft is provided with a shoulder for limiting the movement of the rotor core, and the bearing is located on the outside of the shoulder.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] This invention solves the problem of bearing slippage by setting grooves on the outside of the bearing and using corresponding bearing cover plates, so that the bearing is always movable in the axial direction (the rollers move in the grooves), and is limited in the circumferential direction by the interference between the rollers and the grooves; the bearing installation method of the entire motor is simple in structure and has cost advantages. Attached Figure Description
[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of this utility model after being cut apart;
[0018] Figure 3 and Figure 4 These are two different exploded structural diagrams of this utility model;
[0019] Figure 5 This is a schematic diagram of the installation structure of the bearing and end cap of this utility model.
[0020] The attached figures are labeled as follows: 1. Housing; 2. Stator assembly; 3. Shaft; 31. Shoulder; 4. Rotor core; 5. Front end cover; 51. Bearing mounting groove; 6. Bearing A; 61. Groove; 7. Bearing outer cover plate; 71. Roller; 8. Wave spring; 9. Bearing B; 10. Rear end cover. Detailed Implementation
[0021] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0023] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.
[0024] 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 one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0028] like Figures 1 to 5 As shown, a motor with a function to prevent bearing raceage includes a housing 1, a stator assembly 2, a rotating shaft 3, and a rotor core 4. The stator assembly 2 is fixed to the inner wall of the housing, and the rotor core 4 is fixed to the rotating shaft 3. The rotating shaft 3 is rotatably connected to the housing 1. The housing 1 has end caps at both ends, and one end of the housing 1 is a front end cap 5. A protruding ring is provided on one side of the front end cap 5, and the protruding ring is inserted and fixed to one end of the housing 1. A bearing A6 is provided inside the front end cap 5, and the bearing A6 is floatingly connected to the front end cap 5. The inner ring of the bearing A6 is interference-fitted with one end of the rotating shaft 3.
[0029] The other end of the housing 1 is a rear end cover 10. A protruding ring is also provided on one side of the rear end cover 10, and the protruding ring is inserted and fixed to the other end of the housing 1. A bearing B9 is provided inside the rear end cover 10. A shoulder 31 for limiting the movement of the rotor core is provided on the rotating shaft 3, and the bearing B9 is located on the outside of the shoulder 31. The bearing B9 is fixed to the rear end cover 10, and the inner ring of the bearing B9 is interference-fitted with the other end of the rotating shaft 3.
[0030] The front end cover 5 is provided with a bearing mounting groove 51, and the bearing A6 is disposed in the bearing mounting groove 51. A wave spring 8 is also provided between the bearing A6 and the bottom of the bearing mounting groove 51. A bearing outer cover plate 7 is also fixed on the front end cover 5. The bearing outer cover plate 7 is annular, and multiple rollers 71 are evenly spaced on its inner sidewall. The outer sidewall of the bearing A6 has corresponding grooves 61, which extend along the axial direction of the bearing and penetrate through the outer sidewall of the bearing. At least a portion of the bearing A6 is exposed in the bearing mounting groove 51. The bearing outer cover plate 7 is fitted onto the bearing A6, so that the rollers 71 are embedded in the grooves 61. There are six rollers and six grooves, which are evenly spaced, so that the force is evenly distributed and the bearing can be effectively prevented from running.
[0031] Multiple connecting strips are evenly spaced on the outer side of the bearing outer cover plate 7. Each connecting strip has through holes for easy bolt insertion. The bearing outer cover plate 7 is fixed to the end cap by bolts. The four connecting strips are evenly distributed, ensuring more uniform stress distribution and not affecting the normal operation of the bearing.
[0032] The structure of this utility model is applicable to oil-cooled motors and can solve the problem of bearing slippage at the floating end without affecting the preload of the spring. In this utility model, after the rollers of the bearing outer cover plate are connected to the grooves on the outer diameter surface of the bearing, the bearing is always movable in the axial direction, and the circumferential direction is limited by the action of the rollers and the grooves, thus solving the problem of bearing slippage at its root.
[0033] The structure of this utility model has three main advantages: First, it solves the problem of bearing slippage without affecting the floating effect of the bearing; second, it enables the preload of the wave spring in the drive motor system to remain precise and stable; and third, it has a simple structure and cost advantage.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.
[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims
1. A motor with a function to prevent bearing slippage, comprising a housing (1), a stator assembly (2), a rotating shaft (3), and a rotor core (4), wherein the stator assembly (2) is fixed to the inner wall of the housing, the rotor core (4) is fixed to the rotating shaft (3), the rotating shaft (3) is rotatably connected to the housing (1), and the housing (1) has an end cover at at least one end, the end cover having a bearing mounting groove (51) in which a bearing is provided, characterized in that: The end cap is also fixed with a bearing outer cover plate (7). The bearing outer cover plate (7) is annular and has multiple rollers (71) spaced at equal intervals on its inner sidewall. The outer sidewall of the bearing has corresponding grooves (61). At least part of the bearing is exposed in the bearing mounting groove (51). The bearing outer cover plate (7) is fitted onto the bearing, and the rollers (71) are embedded in the grooves (61). The inner ring of the bearing is interference-fitted with the shaft (3).
2. A motor with a bearing anti-runaway function according to claim 1, characterized in that, The groove (61) extends along the axial direction of the bearing through the outer wall of the bearing.
3. A motor with a bearing anti-runaway function according to claim 1, characterized in that, Multiple connecting strips are equidistantly arranged on the outer side of the bearing outer cover plate (7). The connecting strips are provided with through holes to facilitate bolt penetration. The bearing outer cover plate (7) is fixed to the end cover by bolts.
4. A motor with a bearing anti-runaway function according to claim 1, characterized in that, A wave spring (8) is also provided between the bearing and the bottom of the bearing mounting groove (51).
5. A motor with a bearing anti-runaway function according to claim 1, characterized in that, One end of the housing (1) is a front cover (5), and a protruding ring is provided on one side of the front cover (5). The protruding ring is inserted and fixed to one end of the housing (1). A bearing A (6) is provided inside the front cover (5).
6. A motor with a bearing anti-runaway function according to claim 5, characterized in that, The other end of the housing (1) is a rear end cover (10), and a protruding ring is also provided on one side of the rear end cover (10). The protruding ring is inserted and fixed to the other end of the housing (1). A bearing B (9) is provided inside the rear end cover (10).
7. A motor with a bearing anti-runaway function according to claim 1, characterized in that, The rotating shaft (3) is provided with a shoulder (31) for limiting the rotor core, and the bearing is located on the outside of the shoulder (31).