Bearing assembly, reduction motor, and vehicle

Abstract

The application discloses a bearing assembly, a reduction motor and a vehicle, and belongs to the technical field of mechanical engineering. The bearing assembly comprises a bearing and an elastic piece. The bearing comprises an inner ring, an outer ring and a roller. The roller is located between the inner ring and the outer ring. The elastic piece is used for abutting against the inner ring or the outer ring, so that the inner ring and the outer ring abut against the roller respectively. Through the technical scheme, the inner ring and the outer ring of the bearing abut against the roller respectively, so that the size of the internal clearance of the bearing can be controlled, and the noise generated by the bearing is reduced.

Description

Technical Field

[0001] This application relates to the field of mechanical engineering technology, and in particular to a bearing assembly, a geared motor, and a vehicle. Background Technology

[0002] Bearings are prone to generating noise during use. Related technologies aim to reduce noise by adjusting the thickness of bushings or shims to maintain a certain preload between the inner and outer rings of the bearing. However, this method is not very effective in reducing noise, as significant noise gradually accumulates during use. Utility Model Content

[0003] This application provides a bearing assembly, a geared motor, and a vehicle to at least partially solve the aforementioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a bearing assembly is provided, comprising: a bearing including an inner ring, an outer ring, and rollers, the rollers being located between the inner ring and the outer ring;

[0005] An elastic element is used to abut against the inner ring or the outer ring, so that the inner ring and the outer ring abut against the roller respectively.

[0006] According to a second aspect of this application, a geared motor is provided, including the bearing assembly described above.

[0007] According to a third aspect of this application, a vehicle is also provided, including the aforementioned bearing assembly or the aforementioned geared motor.

[0008] In the bearing assembly of this application embodiment, the above technical solution uses an elastic element to abut against the inner ring or the outer ring, so that the inner ring and the outer ring of the bearing abut against the rollers located between the inner ring and the outer ring, respectively. The elastic element can better control the size of the clearance inside the bearing and reduce the noise generated by the bearing.

[0009] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0012] Figure 1 This is a schematic diagram of the bearing structure provided in an exemplary embodiment of this disclosure;

[0013] Figure 2 This is a schematic diagram of the bearing in a press-fit deformation state provided in an exemplary embodiment of this disclosure;

[0014] Figure 3 This is a schematic diagram of the structure of the bearing and elastic element provided in an exemplary embodiment of this disclosure;

[0015] Figure 4 This is a perspective view of the elastic element provided in an exemplary embodiment of this disclosure;

[0016] Figure 5 This is a side view of the elastic element provided in an exemplary embodiment of this disclosure;

[0017] Figure 6 This is a schematic diagram of the structure of the geared motor provided in an exemplary embodiment of this disclosure;

[0018] Figure 7 yes Figure 6 Enlarged view of the structure at point A in the middle;

[0019] Figure 8 yes Figure 6 Enlarged view of the structure at point B.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Bearing assembly; 20. Bearing; 21. Inner ring; 23. Outer ring; 25. Roller; 26. Upper dust cover; 27. Lower dust cover; 30. Elastic element; 31. First abutment surface; 33. Second abutment surface; 35. Elastic part; 51. First bearing; 511. Inner ring of the first bearing; 513. Outer ring of the first bearing; 53. First elastic element; 71. Second bearing; 711. Inner ring of the second bearing; 713. Outer ring of the second bearing; 73. Second elastic element 2. Gear motor; 3. Gear reduction assembly; 305. Base shell; 301. Impeller body; 302. First mounting slot; 3021. Bottom wall of the first mounting slot; 303. Second mounting slot; 3031. Bottom wall of the second mounting slot; 4. Motor assembly; 401. Housing; 403. Rib; 405. Motor stator; 407. Motor rotor; 5. Bushing; 6. Flexible bearing; 7. Steel wheel; 8. Cross-walled bearing; 9. Bearing outer flange; 200. Flexible wheel. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0023] The main source of noise in bearings, such as rolling bearings, is excessive internal clearance and inappropriate internal preload.

[0024] For example, when the clearance of a rolling bearing is too large, it reduces the load-bearing area inside the bearing, increases the stress on the rolling contact surface, and thus causes increased vibration and noise. The bearing's motion accuracy decreases, and its lifespan is shortened.

[0025] When the clearance of a rolling bearing is too small, it will cause the rolling bearing to heat up and may even cause the bearing to "seize" during operation, which will also increase noise.

[0026] To control the internal clearance of bearings, related technologies adjust the thickness of bushings or shims to maintain a certain preload between the inner and outer rings, thereby reducing noise. However, during subsequent use, significant noise gradually develops, rendering the noise reduction ineffective. One possible reason is that actual bearings are assembled from multiple parts, and limitations in machining precision can lead to large clearances due to the dimensional chain of these parts. Furthermore, high internal temperatures during operation can also affect the internal clearance of the bearing.

[0027] It is easy to understand that noise reduction can be achieved by ensuring the bearing has appropriate clearance. The clearance adjustment should ensure that the bearing has a suitable preload during operation, neither too tight nor too loose. This helps reduce slippage and runout of the rolling elements, thereby reducing noise.

[0028] This application provides a bearing assembly 1. In order to make the bearing 20 have a suitable clearance and reduce the noise generated by the bearing, this application uses an elastic element 30 to achieve constant pressure preload.

[0029] In some implementation methods, please refer to Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of bearing 20 in its natural state. When bearing 20 is in its natural state, roller 25 is located in the middle position between outer ring 23 and inner ring 21, and the clearance between roller 25 and outer ring 23 and inner ring 21 is evenly distributed. Figure 2This is a schematic diagram of the bearing 20 in a press-fit deformed state. When the bearing 20 is in a press-fit deformed state, the clearance between the roller 25 and its surroundings is uneven and pre-tightened, which helps to reduce the slippage and movement of the roller 25, thereby reducing noise.

[0030] The bearing assembly 1 includes a bearing 20 and an elastic element 30. The bearing 20 includes an inner ring 21, an outer ring 23, and rollers 25, with the rollers 25 located between the inner ring 21 and the outer ring 23. The elastic element 30 abuts against the inner ring 21 or the outer ring 23, so that the inner ring 21 and the outer ring 23 of the bearing 20 abut against the rollers 25, respectively. Specifically, it can abut against the axial side of the inner ring 21 or the axial side of the outer ring 23.

[0031] In the bearing assembly of this application embodiment, the above technical solution uses an elastic element to abut against the inner ring or the outer ring, so that the inner ring and the outer ring of the bearing abut against the rollers located between the inner ring and the outer ring, respectively. The elastic element allows the bearing to have an appropriate preload during operation, which helps to reduce slippage and movement of the rolling elements, control the clearance inside the bearing 20 to a more suitable state, and reduce noise.

[0032] This application's solution can employ an elastic element 30 abutting against the axial side of the inner ring 21 and / or the axial side of the outer ring 23, so that the inner ring 21 and outer ring 23 of the bearing 20 respectively abut against the roller 25. In one example, the clearance inside the bearing 20 specifically refers to the distance between the inner ring 21 and the roller 25, and the distance between the outer ring 23 and the roller 25. When the inner ring 21 and outer ring 23 of the bearing 20 abut against the roller 25 respectively, that is, when there is a minimum distance between the inner ring 21 and the roller 25, and when there is a minimum distance between the outer ring 23 and the roller 25, the clearance inside the bearing 20 can be controlled, thereby reducing the noise generated by the bearing 20.

[0033] In some embodiments, the inner ring 21 may be fixed, such that the elastic element 30 abuts against the axial side of the outer ring 23, causing the outer ring 23 to move relative to the inner ring 21 along the axial direction of the bearing assembly 1, so that the inner ring 21 and the outer ring 23 of the bearing 20 abut against the roller 25 respectively. This allows the bearing to have an appropriate preload during operation through the elastic element, which helps to reduce slippage and movement of the rolling elements, control the clearance inside the bearing 20 to a more suitable state, and reduce noise.

[0034] In some embodiments, the outer ring 23 may be fixed so that the elastic element 30 abuts against the axial side of the inner ring 21, causing the inner ring 21 to move relative to the outer ring 23 along the axial direction of the bearing assembly 1, so that the inner ring 21 and the outer ring 23 of the bearing 20 abut against the roller 25 respectively. This allows the bearing to have an appropriate preload during operation through the elastic element, which helps to reduce slippage and movement of the rolling elements, control the clearance inside the bearing 20 to a more suitable state, and reduce noise.

[0035] In some embodiments, one elastic element 30 abuts against the axial side of the inner ring 21, and another elastic element 30 abuts against the axial side of the outer ring 23, causing the outer ring 23 and the inner ring 21 to move relative to each other along the axial direction of the bearing assembly 1. This allows the inner ring 21 and the outer ring 23 of the bearing 20 to abut against the rollers 25, ensuring that the bearing has an appropriate preload during operation—neither too tight nor too loose. This helps reduce slippage and movement of the rolling elements, controls the internal clearance of the bearing 20 to a suitable level, and reduces noise.

[0036] The roller 25 can be a steel ball inside the bearing 20, located between the outer ring 23 and the inner ring 21. During operation, the clearance between the roller 25 and the outer ring 23 and inner ring 21 affects the noise of the bearing 20. When the bearing 20 is in its natural state, the roller 25 is located in the middle position between the outer ring 23 and the inner ring 21, and the clearance between the roller 25 and the outer ring 23 and inner ring 21 is evenly distributed. Furthermore, an upper dust cover 26 and a lower dust cover 27 can be provided on the top and bottom of the bearing 20, respectively.

[0037] In some embodiments, the elastic element 30 can be a corrugated sheet, that is, a corrugated sheet is used to achieve constant pressure preload. A corrugated sheet is a regular, wavy, circular thin sheet, generally used to prevent loosening and buffer impacts, and must have good elasticity and impact resistance. The rigidity of the corrugated sheet is usually less than that of the bearing 20. The relative position of the bearing 20 with constant pressure preload may change during use, but the preload amount remains approximately unchanged.

[0038] When the elastic element 30 is pressed against one side of the bearing 20, for example, when the elastic element 30 abuts against the outer ring 23 of the bearing 20, the bearing 20 is in a press-fit deformation state, and the clearance between the roller 25 and the surrounding area is uneven and in a pre-tightened state, which helps to reduce the slippage and movement of the roller 25, thereby reducing noise.

[0039] Please combine Figure 3 , Figure 4 as well as Figure 5In some embodiments, the elastic element 30 includes a first abutting surface 31, a second abutting surface 33, and an elastic portion 35 connected between the first abutting surface 31 and the second abutting surface 33. The first abutting surface 31 is used to abut the inner ring 21 or the outer ring 23. Specifically, the first abutting surface 31 can be used to abut the axial side of the inner ring 21 or the axial side of the outer ring 23. The second abutting surface 33 is located on the side of the first abutting surface 31 away from the bearing 20.

[0040] In some embodiments, the first abutment surface 31 and the second abutment surface 33 are alternately distributed along the circumference of the elastic element 30. The elastic element 30 may be an annular elastic element 30, which can better correspond to the inner ring 21 or outer ring 23 of the bearing, so as to better abut against the inner ring 21 or outer ring 23.

[0041] In some embodiments, the bearing 20 is a ball bearing 20. The rotor is a sphere. Its function may be to support the rotating shaft or other moving parts, reduce the coefficient of friction during movement, and ensure the rotational accuracy of the shaft.

[0042] According to a second aspect of this disclosure, a geared motor 2 is provided, which includes the aforementioned bearing assembly 1. The geared motor 2 has all the beneficial effects of the aforementioned bearing assembly 1, which will not be repeated here.

[0043] In some embodiments, the reduction assembly 3 may include a harmonic reducer. The geared motor 2 is prone to noise during operation, one source of which is the bearing 20. In embodiments of this application, the elastic element 30 abuts against the axial side of the inner ring 21 and / or the axial side of the outer ring 23, so that the inner ring 21 and outer ring 23 of the bearing 20 respectively abut against the roller 25, thereby controlling the clearance inside the bearing 20, reducing the noise of the bearing 20, and thus reducing the noise of the geared motor 2. It is readily understood that a harmonic reducer is a gear transmission device composed of a fixed internal gear, a flexible gear, and a wave generator that causes radial deformation of the flexible gear. It features a compact structure, large transmission ratio, high precision, and light weight, and is widely used in industrial robots, aerospace, medical devices, precision instruments, and other fields, serving as a key core component for achieving high-precision motion control.

[0044] Please combine Figure 6 , Figure 7 as well as Figure 8 In some embodiments, the geared motor 2 includes a gear reduction assembly 3 and a motor assembly 4 connected to each other. The gear reduction assembly 3 includes a pulsator body 301. The motor assembly 4 includes a housing 401. The outer ring 23 of the bearing 20 is connected to the housing 401, and the inner ring 21 of the bearing 20 is connected to the pulsator body 301.

[0045] The housing 401 of the motor assembly 4 serves as a bracket for placing the motor and also positions the bearing 20.

[0046] The motor assembly 4 may also include a motor stator 405 and a motor rotor 407, which are the two major functional components of the power source motor.

[0047] The geared motor 2 may also include a flexible bearing 6, wherein the impeller body 301 is a convex part, which can be a component that causes the flexible bearing 6 to generate periodic elastic deformation waves according to a certain deformation law. The flexible bearing 6 is a rolling bearing 20 mounted on the impeller body 301 and capable of generating corresponding deformations according to the curve shape of the cam wheel.

[0048] The geared motor 2 may also include a steel wheel 7, a cross-shaped thin-walled bearing 8, and a bearing outer flange 9. The cross-shaped thin-walled bearing 8 has the function of fixing and positioning the steel wheel 7. The steel wheel 7 is a gear that can maintain its original shape during operation, just like a regular gear. Under the action of the impeller body 301, the flexible wheel 200 can produce a thin-walled gear with controllable elastic deformation.

[0049] The outer flange 9 of the bearing can fix the bottom outer ring of the flexible wheel, while the housing 401 of the external equipment can play a role in fixing and positioning the entire reducer module.

[0050] In one example, the corrugated spring can be pressed against one edge of the rolling bearing 20; the bushing 5 is pressed against the other side of the bearing 20. This serves to axially position the bearing 20.

[0051] In some embodiments, the bearing 20 includes a first bearing 51, the impeller body 301 is provided with a first mounting groove, and the geared motor 2 further includes a bushing 5, which is sleeved on the impeller body 301. Along the axial direction of the geared motor 2, the bottom wall 3021 of the first mounting groove and the bushing 5 respectively abut against the opposite end faces of the inner ring 511 of the first bearing. This arrangement fixes the inner ring 511 of the first bearing.

[0052] In some embodiments, the bottom wall 3021 of the first mounting groove is recessed with a second mounting groove 303. The elastic element 30 includes a first elastic element 53 that cooperates with the first bearing 51. Along the axial direction of the geared motor 2, the first elastic element 53 is disposed opposite to the bottom wall 3031 of the second mounting groove. One end face of the outer ring 513 of the first bearing abuts against the first elastic element 53, and the other end face is spaced apart from the bottom wall 3031 of the second mounting groove. This arrangement fixes the inner ring 511 of the first bearing. The outer ring 513 of the first bearing is preloaded by the first elastic element 53, and the other end face is spaced apart from the bottom wall 3031 of the second mounting groove. This provides space for the movement of the outer ring 513 of the first bearing.

[0053] In some embodiments, the housing 401 is provided with a rib 403, which is disposed opposite to the bottom wall 3031 of the second mounting groove. The two opposite ends of the first elastic member 53 along the axial direction respectively abut against the end face of the outer ring 513 of the first bearing and the rib 403. With this arrangement, the first elastic member 53 is disposed between the end face of the outer ring 513 of the first bearing and the rib 403. The rib 403 is fixed relative to the housing 401. The first elastic member 53 can undergo elastic deformation under force between the end face of the outer ring 513 of the first bearing and the rib 403, thereby providing a preload force on the outer ring 513 of the first bearing. This controls the clearance inside the bearing 20, reduces the noise of the bearing 20, and thus reduces the noise of the geared motor 2.

[0054] In some embodiments, the bearing 20 includes a second bearing 71, the reduction assembly 3 further includes a base housing 305 connected to the housing 401, the impeller body 301 is mounted on the base housing 305, and the reduction motor 2 further includes a bushing 5 sleeved on the impeller body 301. Along the axial direction of the reduction motor 2, the end faces of opposite ends of the inner ring 711 of the second bearing abut against the base housing 305 and the bushing 5, respectively. This achieves fixed mounting of the inner ring 711 of the second bearing via the base housing 305 and the bushing 5.

[0055] The bottom shell 305 is the outer shell of the reduction assembly 3. The bottom shell 305 is used to fix the motor housing 401, and at the same time, the bottom shell 305 also plays a role in axial positioning of the bearing 20.

[0056] In some embodiments, the elastic element 30 includes a second elastic element 73 that cooperates with the second bearing 71. The housing 401 is provided with a rib 403, which is disposed opposite to the outer ring 713 of the second bearing along the axial direction of the geared motor 2. The second elastic element 73 abuts against the outer ring 713 of the second bearing and the rib 403. This arrangement fixes the inner ring 711 of the second bearing. The outer ring 713 of the second bearing is preloaded by the second elastic element 73.

[0057] The bushing 5 is used for initial positioning of the bearing 20 and also serves to support the bearing 20. The bearing 20 is fitted onto the impeller body 301. The bushing 5 is fitted onto the impeller body 301. The bushing 5 abuts against the axial side of the inner ring 21 of the bearing 20, and the elastic element 30 abuts against the axial side of the outer ring 23 of the bearing 20.

[0058] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned bearing assembly 1 or the aforementioned geared motor 2, and the vehicle has all the beneficial effects of the aforementioned bearing assembly 1 or the aforementioned geared motor 2, which will not be repeated here.

[0059] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0060] In the description of this application, 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A bearing assembly, characterized in that, include; A bearing includes an inner ring, an outer ring, and rollers, the rollers being located between the inner ring and the outer ring; An elastic element is used to abut against the inner ring or the outer ring, so that the inner ring and the outer ring respectively abut against the roller.

2. The bearing assembly according to claim 1, characterized in that, The elastic element includes a first abutting surface, a second abutting surface, and an elastic portion connected between the first abutting surface and the second abutting surface. The first abutting surface is used to abut against the inner ring or the outer ring, and the second abutting surface is located on the side of the first abutting surface away from the bearing.

3. The bearing assembly according to claim 2, characterized in that, The first contact surface and the second contact surface are alternately distributed along the circumference of the elastic member.

4. The bearing assembly according to any one of claims 1 to 3, characterized in that, The elastic element is a ring-shaped elastic element; and / or The bearing is a ball bearing.

5. A geared motor, characterized in that, Includes the bearing assembly as described in any one of claims 1-4.

6. The geared motor according to claim 5, characterized in that, The geared motor includes a gear reduction assembly and a motor assembly connected together. The deceleration assembly includes a pulsator body; The motor assembly includes a housing; The outer ring of the bearing is connected to the housing, and the inner ring of the bearing is connected to the impeller body.

7. The geared motor according to claim 6, characterized in that, The bearing includes a first bearing. The impeller body is provided with a first mounting groove. The geared motor also includes a bushing, which is sleeved on the impeller body. Along the axial direction of the geared motor, the bottom wall of the first mounting groove and the bushing respectively abut against the opposite end faces of the inner ring of the first bearing.

8. The geared motor according to claim 7, characterized in that, The bottom wall of the first mounting groove is recessed with a second mounting groove. The elastic element includes a first elastic element that cooperates with the first bearing. Along the axial direction of the geared motor, the first elastic element is disposed opposite to the bottom wall of the second mounting groove. One end face of the outer ring of the first bearing abuts against the first elastic element, and the other end face is spaced apart from the bottom wall of the second mounting groove.

9. The geared motor according to claim 8, characterized in that, The housing is provided with a rib, which is disposed opposite to the bottom wall of the second mounting groove. The two opposite ends of the first elastic member along the axial direction respectively abut against the end face of the outer ring of the first bearing and the rib.

10. The geared motor according to claim 6, characterized in that, The bearing includes a second bearing. The deceleration assembly also includes a base shell, which is connected to the housing, and the impeller body is mounted on the base shell. The geared motor also includes a bushing, which is sleeved on the impeller body. Along the axial direction of the geared motor, the end faces of the opposite ends of the inner ring of the second bearing abut against the base shell and the bushing, respectively.

11. The geared motor according to claim 10, characterized in that, The elastic element includes a second elastic element that cooperates with the second bearing. The housing is provided with a rib along the axial direction of the geared motor. The rib is disposed opposite to the outer ring of the second bearing. The second elastic element abuts against the outer ring of the second bearing and the rib.

12. A vehicle, characterized in that, It includes the bearing assembly as described in any one of claims 2-4 or the geared motor as described in any one of claims 5-11.

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