Bearing assembly and speed reducer
By creating an annular groove on the inner wall of the bearing housing and embedding an anti-slip ring, the problem of bearing creep in the motor reducer is solved, achieving bearing stability and current corrosion prevention, and improving installation efficiency and reducer reliability.
Patent Information
- Application Number
- CN202520181563.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-05
Smart Images
Figure CN223725188U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing technical field, especially a bearing assembly and speed reducer. BACKGROUND
[0002] Bearing is an important part in contemporary mechanical equipment. For example, in the motor reducer of new energy automobile, bearing is used for supporting speed reduction shaft, reducing friction coefficient of speed reduction shaft in rotating process, and guaranteeing its rotation accuracy. In actual application, because the load of speed reduction shaft is large and the rotating speed is fast, the bearing usually has the problem of creeping, that is, the inner ring or outer ring of the bearing and the bearing seat slide or rotate relatively in the working process of the bearing. The bearing creeping will cause serious wear to the bearing seat, affect the service life and reliability of the bearing, and thus affect the normal driving of the automobile. SUMMARY
[0003] The utility model discloses a bearing assembly and speed reducer, which can avoid the creeping phenomenon of the bearing in the working process.
[0004] To solve the above technical problems, the embodiment of the utility model discloses a bearing assembly, which comprises:
[0005] The bearing comprises:
[0006] The inner ring is used for being connected with the shaft;
[0007] The outer ring is coaxially arranged with the inner ring, and the outer ring is rotationally connected to the inner ring;
[0008] The circumferential side wall of the outer ring is provided with an insulating coating;
[0009] The bearing seat is connected with the outer ring of the bearing, the inner wall of the bearing seat is provided with an annular groove, and the annular groove extends along the circumference of the bearing seat;
[0010] The anti-skid ring is embedded in the annular groove, surrounds the outer ring, and abuts against the insulating coating, and the anti-skid ring can prevent the outer ring from sliding along the circumference and the axial direction relative to the inner wall of the bearing seat.
[0011] According to the technical scheme, the annular groove is arranged on the inner wall of the bearing seat, the anti-skid ring is embedded in the annular groove, and the anti-skid ring abuts against the insulating coating of the outer ring of the bearing, so that the anti-skid ring can generate axial friction force and circumferential friction force on the insulating coating of the outer ring of the bearing, thereby preventing the outer ring of the bearing from sliding along the axial direction and the circumferential direction relative to the bearing seat, and further preventing the bearing from creeping. Meanwhile, since the annular groove is arranged on the bearing seat instead of the outer ring of the bearing, the insulating coating is not damaged. Therefore, the problem of current corrosion is effectively solved while the bearing creeping is avoided.
[0012] According to one specific embodiment of the present application, the cross section of the anti-skid ring is O-shaped.
[0013] According to one specific embodiment of the present application, the cross section of the anti-skid ring is X-shaped.
[0014] According to one specific embodiment of the present application, along the radial direction of the anti-skid ring, a guide angle is arranged on the side of the anti-skid ring away from the bearing seat, and the guide angle is used to guide the outer ring so that the outer ring is assembled to the inner wall of the bearing seat.
[0015] According to the technical scheme, the guide angle is arranged on the side of the anti-skid ring away from the bearing seat, the opening of the side of the anti-skid ring is enlarged by the guide angle, and therefore the outer ring of the bearing is facilitated to pass through. In other words, the guide angle can guide the outer ring of the bearing to pass through the anti-skid ring along the axial direction, thereby facilitating the assembly of the outer ring to the inner wall of the bearing seat, and effectively improving the installation efficiency of the bearing.
[0016] According to one specific embodiment of the present application, the number of the annular grooves is two, and the two annular grooves are arranged at intervals along the axial direction.
[0017] According to one specific embodiment of the present application, the number of the anti-skid rings is two, and each of the two anti-skid rings is embedded in one of the annular grooves.
[0018] The embodiment of the present application further discloses a speed reducer used for being connected with an output shaft of a motor, and the speed reducer comprises:
[0019] a speed reduction shaft;
[0020] at least one bearing assembly according to any one of the above specific embodiments;
[0021] the inner ring of the bearing of the bearing assembly is connected with the speed reduction shaft, and the inner ring rotates synchronously with the speed reduction shaft.
[0022] According to the technical scheme, the annular groove is arranged on the inner wall of the bearing seat, the anti-skid ring is embedded in the annular groove, and the anti-skid ring abuts against the insulating coating of the outer ring of the bearing, so that the anti-skid ring can generate axial friction force and circumferential friction force on the insulating coating of the outer ring of the bearing, thereby preventing the outer ring of the bearing from sliding axially and circumferentially relative to the bearing seat, avoiding the creep of the bearing, and ensuring the normal operation of the speed reducer. Meanwhile, since the annular groove is arranged on the bearing seat instead of the outer ring of the bearing, the insulating coating is not damaged, so that the current generated during the operation of the motor cannot be conducted to the bearing seat through the bearing, thereby effectively solving the problem of current corrosion while avoiding the creep of the bearing.
[0023] According to one specific embodiment of the present application, the number of bearing assemblies is two;
[0024] The two bearing assemblies are arranged axially and spaced apart.
[0025] According to one specific embodiment of the present application, the speed reduction shaft is provided with external teeth;
[0026] Along the axial direction, the external teeth are located between the two bearing assemblies.
[0027] According to one specific embodiment of the present application, the external teeth are helical teeth. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 A cross-sectional view of the speed reducer according to an embodiment of the present application is shown.
[0029] Figure 2 A side view of the anti-skid ring and the outer ring of the bearing in the bearing assembly of the speed reducer according to an embodiment of the present application is shown.
[0030] Figure 3 A cross-sectional view of the anti-skid ring of the speed reducer according to an embodiment of the present application is shown.
[0031] Figure 4 A cross-sectional view of the speed reducer according to another embodiment of the present application is shown.
[0032] Figure 5 A cross-sectional view of the anti-skid ring of the speed reducer according to another embodiment of the present application is shown.
[0033] Figure 6 A cross-sectional view of the speed reducer according to another embodiment of the present application is shown.
[0034] Figure 7 A cross-sectional view of the anti-skid ring of the speed reducer according to another embodiment of the present application is shown.
[0035] REFERENCE SIGNS:
[0036] 10. Reducer;
[0037] 100. Bearing assembly;
[0038] 110. Bearing, 111. Outer ring, 1111. Circumferential outer wall, 1112. Axial side wall, 112. Inner ring, 113. Insulating coating;
[0039] 120. Bearing seat, 121. Annular groove;
[0040] 130. Anti-skid ring, 131. Guide angle;
[0041] 200. Reducing shaft, 210. Connection end, 220. Outer tooth. DETAILED DESCRIPTION
[0042] The other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the present description. Although the description of the present application will be introduced in combination with the preferred embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications which can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0043] It should be noted that in the present description, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0044] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0045] The terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0046] In the description of the embodiments, it should also be noted that unless specifically defined and limited, the terms "set", "connected", "connected", should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.
[0047] In order to make the purpose, technical scheme and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below with reference to the drawings.
[0048] Reference Figure 1 The embodiments of the present application provide a speed reducer 10. It should be noted that the embodiments of the present application do not specially limit the specific type of the speed reducer 10, and the embodiments of the present application take the motor speed reducer (i.e. the speed reduction shaft of the speed reducer 10 is connected to the output shaft of the motor) as an example for description.
[0049] Continue to refer to Figure 1 In the embodiments of the present application, the speed reducer 10 comprises two bearing assemblies 100 and a speed reduction shaft 200. Along the axial direction X of the speed reduction shaft 200, the two bearing assemblies 100 are arranged on the speed reduction shaft 200 at intervals, and the connecting end 210 of the speed reduction shaft 200 is used to connect the output shaft (not shown in the figure) of the motor. The speed reduction shaft 200 is provided with external teeth 220, and along the axial direction X, the external teeth 220 are located between the two bearing assemblies 100. In the embodiments of the present application, the external teeth 220 are helical teeth, but are not limited thereto, and in other possible embodiments, the external teeth 220 can also be straight teeth. The external teeth 220 are used to mesh with the external teeth on other speed reduction shafts in the speed reducer 10, so as to reduce the output shaft of the motor.
[0050] The specific structure of each bearing assembly 100 will be described in detail below.
[0051] Continue to refer to Figure 1 Exemplarily, each bearing assembly 100 comprises a bearing 110, a bearing seat 120 and two anti-skid rings 130.
[0052] The number of bearing assemblies 100 is not specifically limited in the embodiments of the present application, for example, in other possible embodiments, the number of bearing assemblies 100 can also be three, four or five or more.
[0053] In the embodiments of the present application, the bearing 110, the bearing seat 120, the anti-skid ring 130 and the speed reduction shaft 200 are coaxially arranged, and the axial directions of the bearing 110, the bearing seat 120, the anti-skid ring 130 and the speed reduction shaft 200 are all the direction X, and the circumferential directions are all the direction R.
[0054] Specifically, the bearing 110 comprises an outer ring 111 and an inner ring 112. The inner ring 112 is sleeved on the reduction shaft 200 and connected with the reduction shaft 200 along the circumferential direction R, and the inner ring 112 can rotate synchronously with the reduction shaft 200. The outer ring 111 is coaxially arranged with the inner ring 112, and the outer ring 111 can rotate relative to the inner ring 112 along the circumferential direction R, and the outer ring 111 is connected with the inner wall of the bearing seat 120.
[0055] Exemplarily, continuing to refer to Figure 1 The outer ring 111 of the bearing 110 is provided with an insulating coating 113. Specifically, the axial side wall 1112 of the outer ring 111 is provided with the insulating coating 113 along the axial direction X, and the circumferential outer wall 1111 of the outer ring 111 is also provided with the insulating coating 113 along the circumferential direction R. The insulating coating 113 of the axial side wall 1112 and the insulating coating 113 of the circumferential outer wall 1111 are integrally formed.
[0056] Since the reduction shaft 200 in the embodiment of the application is used to be connected with the output shaft of the motor, and the motor generates current during operation, the insulating coating 113 can effectively prevent the current from being conducted to other metal parts of the reduction gear 10 through the reduction shaft 200 and the bearing 110, thereby avoiding current corrosion of the reduction gear 10, prolonging the service life of the reduction gear 10, and improving the reliability of the reduction gear 10.
[0057] In other possible embodiments, the insulating coating 113 can also be provided only on the circumferential outer wall 1111 of the outer ring 111, as long as the insulating coating 113 can electrically isolate the bearing 110 from the bearing seat 120, thereby avoiding the current from being conducted to the bearing seat 120 through the bearing 110.
[0058] Exemplarily, referring to Figure 1 and combining Figure 2 The inner wall of the bearing seat 120 is provided with two annular grooves 121 along the circumferential direction R, and the two annular grooves 121 are arranged at intervals along the axial direction X. Each annular groove 121 extends along the circumferential direction R, and each anti-skid ring 130 of the two anti-skid rings 130 is embedded in one annular groove 121. Each anti-skid ring 130 surrounds the outer ring 111 of the bearing 110 along the circumferential direction R, and each anti-skid ring 130 abuts against the insulating coating 113 of the outer ring 111. The anti-skid ring 130 can effectively prevent the outer ring 111 from sliding relative to the inner wall of the bearing seat 120 along the circumferential direction R and the axial direction X, thereby avoiding the bearing 110 from creeping.
[0059] In the embodiment of the present application, the annular groove 121 is arranged on the inner wall of the bearing seat 120, and the anti-skid ring 130 is embedded in the annular groove 121 and abuts against the insulating coating 113 of the outer ring 111 of the bearing 110. The anti-skid ring 130 can generate frictional force along the axial direction X and the circumferential direction R on the outer ring 111 of the bearing 110, thereby preventing the outer ring 111 of the bearing 110 from sliding along the axial direction X and the circumferential direction R relative to the bearing seat 120, and further avoiding the creep of the bearing 110. Meanwhile, the annular groove 121 arranged on the bearing seat 120 will not damage the insulating coating 113. Thus, the problem of current corrosion is effectively solved while avoiding the creep of the bearing 110.
[0060] Exemplarily, the number of the anti-skid rings 130 in each bearing assembly 100 is not specifically limited in the embodiment of the present application. For example, in other possible embodiments, the number of the anti-skid rings 130 in each bearing assembly 100 can also be one, three, four or more. Correspondingly, the number of the annular grooves 121 of each bearing seat 120 is also not specifically limited in the embodiment of the present application, as long as the number of the annular grooves 121 is the same as that of the anti-skid rings 130. For example, in other possible embodiments, the number of the annular grooves 121 on each bearing seat 120 is one, three, four or more.
[0061] With reference to Figure 1 and Figure 3 , the cross section of the anti-skid ring 130 in the embodiment of the present application is O-shaped, that is, the anti-skid ring 130 in the embodiment of the present application is an O-ring.
[0062] The cross-sectional shape of the anti-skid ring 130 is not specifically limited in the embodiment of the present application. For example, with reference to Figure 4 and Figure 5 , the cross section of the anti-skid ring 130 is approximately X-shaped, that is, the anti-skid ring 130 is an X-ring.
[0063] Exemplarily, with reference to Figure 6 and Figure 7 , in some possible embodiments, a guide angle 131, specifically a chamfer, is arranged on the side of the anti-skid ring 130 away from the bearing seat 120 along the radial direction Y (the radial direction Y is perpendicular to the axial direction X). The guide angle 131 makes the opening on one side of the anti-skid ring 130 along the axial direction X larger, thereby facilitating the outer ring 111 of the bearing 110 to pass through the anti-skid ring 130. In other words, when the bearing 110 is installed on the bearing seat 120, the guide angle 131 can guide the outer ring 111 of the bearing 110 to pass through the anti-skid ring 130 along the axial direction X, thereby facilitating the assembly of the outer ring 111 on the inner wall of the bearing seat 120 and effectively improving the installation efficiency of the bearing 110.
[0064] It should be noted that the application embodiments do not have special restrictions on the application scenarios of the bearing assembly 100. For example, in other possible embodiments, the bearing assembly 100 can also be applied to a motor or other transmission device.
[0065] Although the utility model has been illustrated and described with reference to certain preferred embodiments, it should be understood by those skilled in the art that the above is a further detailed description of the utility model in combination with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple inferences or substitutions, without departing from the spirit and scope of the utility model.
Claims
1. A bearing assembly characterized by, The application relates to a bearing assembly and a speed-reducing shaft. The bearing assembly comprises: a bearing, comprising: an inner ring for connecting with a shaft; an outer ring coaxially arranged with the inner ring, the outer ring being rotationally connected with the inner ring; a circumferential side wall of the outer ring being provided with an insulating coating; a bearing seat connected with the outer ring of the bearing, an inner wall of the bearing seat being provided with an annular groove extending along the circumferential direction of the bearing seat; 2. The bearing assembly of claim 1, wherein, an anti-skid ring embedded in the annular groove, the anti-skid ring surrounding the outer ring, and the anti-skid ring abutting against the insulating coating, the anti-skid ring being capable of preventing the outer ring from sliding relative to the inner wall of the bearing seat along the circumferential direction and the axial direction.
3. The bearing assembly of claim 1, wherein, The anti-skid ring has an O-shaped cross section.
4. The bearing assembly of claim 1, wherein, The anti-skid ring has an X-shaped cross section.
5. The bearing assembly of claim 1, wherein, Along the radial direction of the anti-skid ring, a guide angle is arranged on the side of the anti-skid ring away from the bearing seat, the guide angle being used for guiding the outer ring to be assembled on the inner wall of the bearing seat.
6. The bearing assembly of claim 5, wherein, The number of the annular grooves is two, and the two annular grooves are arranged at intervals along the axial direction.
7. A speed reducer for connection with an output shaft of an electric motor, characterized by The number of the anti-skid rings is two, and each of the two anti-skid rings is embedded in one of the annular grooves. The application further relates to a speed-reducing shaft. The speed-reducing shaft is connected with the inner ring of the bearing of the bearing assembly, and the inner ring rotates synchronously with the speed-reducing shaft. The number of the bearing assemblies is two.
8. The speed reducer of claim 7, wherein The two bearing assemblies are arranged at intervals along the axial direction. The speed-reducing shaft is provided with external teeth.
9. The speed reducer of claim 8, wherein Along the axial direction, the external teeth are located between the two bearing assemblies. The external teeth are helical teeth.
10. The speed reducer of claim 9, wherein