Bearing assembly and motor

Abstract

The utility model provides a bearing assembly and a motor, the bearing assembly comprises a bearing, a bearing bin with a bearing assembly space, and a first buffer piece and a second buffer piece which are arranged between the bearing bin and the bearing, the bearing comprises a bearing outer ring and a bearing inner ring, and the bearing outer ring is provided with a peripheral surface, a first end surface and a second end surface; the first buffering piece is of an integrally-formed annular structure and comprises a first radial buffering part acting on the outer circumferential face and a first axial buffering part acting on the first end face. The second buffering piece is of an integrally-formed annular structure and comprises a second radial buffering part acting on the outer circumferential face and a second axial buffering part acting on the second end face. The first buffering piece and the second buffering piece limit the bearing in the radial direction and the axial direction, the bearing installed in the bearing bin in a clearance mode is prevented from shaking, the excellent damping effect is achieved, the overall structure is simple, and cost is low.

Description

Technical Field

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

[0002] As a precision mechanical component, the primary function of a bearing is to fix and reduce the coefficient of friction of the load during mechanical transmission. Bearings are widely used in various transmission machinery and equipment. They are typically installed in a bearing housing to form a bearing assembly. The bearing housing provides support and restraint. There are three common designs for the fit between the bearing housing and the bearing:

[0003] The first type is where the outer ring of the bearing is directly interference-fitted with the bearing housing. This type has high overall structural strength and no axial or radial movement. However, it is complicated to install and can easily damage the bearing.

[0004] The second type uses a smaller clearance fit between the outer ring of the bearing and the bearing housing. The overall structure is simple to install, but the disadvantage is that the vibration and noise are obvious.

[0005] The third type uses a larger clearance fit between the bearing outer ring and the bearing housing, and adds an O-ring between the inner ring of the bearing housing and the outer ring of the bearing. The O-ring is used to ensure the bearing position. The overall structure is simple to install, and compared with the second type of fit design, vibration and noise are significantly reduced. Therefore, it is widely used in some products with high noise requirements. However, this assembly method, which relies solely on the interference fit between the O-ring and the inner ring of the bearing housing and the outer ring of the bearing to fix the bearing position, has lower overall structural strength compared with the first fit design. Under long-term high-speed rotation or when subjected to large external impacts, the bearing is prone to loosening, affecting normal use. Utility Model Content

[0006] This application provides a bearing assembly that improves overall structural strength and extends service life while achieving vibration reduction and noise reduction effects.

[0007] This application provides a bearing assembly, including a bearing, a bearing housing with bearing assembly space, and a first buffer and a second buffer disposed between the bearing housing and the bearing. The bearing includes an outer ring and an inner ring, and the outer ring has an outer peripheral surface, a first end face, and a second end face.

[0008] The first buffer is an integrally formed ring structure, including a first radial buffer portion acting on the outer peripheral surface and a first axial buffer portion acting on the first end face;

[0009] The second buffer is an integrally formed ring structure, including a second radial buffer portion acting on the outer peripheral surface and a second axial buffer portion acting on the second end face.

[0010] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0011] Optionally, the first radial buffer portion and the second radial buffer portion are axially spaced.

[0012] Optionally, the inner wall of the bearing housing has a raised heat-conducting portion that protrudes and approaches the outer ring of the bearing, the heat-conducting portion being located within the gap between the first radial buffer portion and the second radial buffer portion.

[0013] Optionally, the heat-conducting part provides axial restraint for the first buffer and the second buffer.

[0014] Optionally, the heat-conducting part is a separate component from the bearing housing.

[0015] Optionally, the bearing housing includes a first limiting part and a second limiting part for axially positioning the bearing, the first axial buffer part being located between the first limiting part and the first end face, and the second axial buffer part being located between the second limiting part and the second end face.

[0016] Optionally, at least one of the first limiting portion and the second limiting portion can be detached.

[0017] Optionally, the first and second buffers are integrated into one unit.

[0018] This application also provides an electric motor, including a housing, a rotor, and a stator, wherein the stator is disposed around the rotor, the rotor includes a motor shaft, and a first bearing and a second bearing for supporting the rotation of the motor shaft are sleeved on the motor shaft, and the housing includes a first end cover and a second end cover for respectively positioning and mounting the first bearing and the second bearing.

[0019] The first end cover has a first bearing assembly space for assembling the first bearing. The first bearing assembly space is provided with a first buffer and a second buffer to absorb the movement allowance of the first bearing. The first bearing includes an outer ring and an inner ring. The outer ring has an outer peripheral surface, a first end surface, and a second end surface.

[0020] The first buffer is an integrally formed ring structure, including a first radial buffer portion acting on the outer peripheral surface and a first axial buffer portion acting on the first end face;

[0021] The second buffer is an integrally formed ring structure, including a second radial buffer portion acting on the outer peripheral surface and a second axial buffer portion acting on the second end face.

[0022] Optionally, the first end cover is provided with a separately configured bearing housing containing the first bearing assembly space.

[0023] Optionally, the first radial buffer portion and the second radial buffer portion are axially spaced.

[0024] Optionally, the inner wall of the bearing housing has a raised heat-conducting portion that protrudes and approaches the outer ring of the bearing, the heat-conducting portion being located within the gap between the first radial buffer portion and the second radial buffer portion.

[0025] Optionally, the heat-conducting part provides axial restraint for the first buffer and the second buffer.

[0026] Optionally, the heat-conducting part is a separate component from the bearing housing.

[0027] The bearing assembly of this application uses a first buffer and a second buffer to limit the bearing radially and axially, preventing the bearing from shaking when it is installed in the bearing housing with clearance, thus achieving excellent shock absorption. The overall structure is simple and low in cost. When the bearing assembly of this application is installed, the first buffer and the second buffer reduce the noise and vibration of the motor during operation.

[0028] Figure Labels

[0029] Figure 1 This is a schematic diagram of the structure of a bearing assembly according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a bearing assembly according to another embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a bearing assembly according to another embodiment of this application;

[0032] Figure 4 This is a cross-sectional view of a motor according to an embodiment of this application.

[0033] The attached diagram is described below:

[0034] 100, Bearing; 101, First Bearing; 102, Second Bearing; 110, Bearing Outer Ring; 111, First End Face; 112, Second End Face; 113, Outer Peripheral Surface; 120, Bearing Inner Ring;

[0035] 200, bearing housing; 210, first limiting part; 220, second limiting part; 230, heat-conducting part;

[0036] 300. Housing; 310. First end cover; 320. Second end cover; 400. Spacing;

[0037] 500, Buffer component; 510, First buffer component; 511, First radial buffer portion; 512, First axial buffer portion; 520, Second buffer component; 521, Second radial buffer portion; 522, Second axial buffer portion;

[0038] 600, stator; 700, rotor; 710, motor shaft. Detailed Implementation

[0039] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0041] Unless otherwise defined, 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 belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] like Figures 1-3 The bearing assembly shown includes a bearing 100, a bearing housing 200 having bearing assembly space, and a first buffer 510 and a second buffer 520 disposed between the bearing housing 200 and the bearing 100. The bearing 100 has a coaxial clearance within the bearing housing 200. The bearing 100 includes an outer ring 110 and an inner ring 120. The outer ring 110 has a radially located outer peripheral surface 113 and an axially located first end face 111 and a second end face 112.

[0044] To achieve axial positioning of the bearing 100, the bearing housing 200 includes a main body, and a first limiting part 210 and a second limiting part 220 connected to the main body and axially positioning the bearing 100. The first limiting part 210 and the second limiting part 220 act directly or indirectly on the first end face 111 and the second end face 112. For ease of assembly, at least one of the first limiting part 210 and the second limiting part 220 can be detached. For example, the first limiting part 210 is an annular plate and is vertically disposed at the left end of the main body, and the second limiting part 220 is vertically disposed at the right end of the main body and is detachably connected to the main body. The main body is provided with an annular mounting groove, and the second limiting part 220 is coaxially fixedly installed in the annular mounting groove using an annular retaining ring, annular snap ring, etc., which has high structural strength and small axial dimension. The specific fixing method can be interference fit, welding, or adhesive bonding, etc.

[0045] The first buffer member 510 is an integrally formed annular structure, including a first radial buffer portion 511 acting on the outer peripheral surface 113 and a first axial buffer portion 512 acting on the first end face 111. In the figure, the first radial buffer portion 511 is located between the bearing housing 200 and the outer peripheral surface 113, and its radial sides interact with both, for example, by fitting and abutting against each other. The first axial buffer portion 512 is located between the first limiting portion 210 and the first end face 111, and its axial sides interact with both, for example, by fitting and abutting against each other.

[0046] The second buffer member 520 is an integrally formed annular structure, including a second radial buffer portion 521 acting on the outer peripheral surface 113 and a second axial buffer portion 522 acting on the second end face 112. The second radial buffer portion 521 and the first radial buffer portion 511 are at different heights along the axial direction, and the second radial buffer portion 521 is located between the bearing housing 200 and the outer peripheral surface 113. At the same time, the radial sides of the second radial buffer portion 521 interact with both of them, for example, by fitting and abutting against each other. The second axial buffer portion 522 is located between the second limiting portion 220 and the second end face 112, and interacts with both of them axially, for example, by fitting and abutting against each other.

[0047] The first buffer 510 and the second buffer 520 isolate the bearing 100 and the bearing housing 200, while simultaneously providing axial and radial restraint to the bearing 100, preventing bearing wobbling within the bearing housing and achieving excellent vibration damping. The overall structure is simple and low-cost. Furthermore, the first and second buffers are rigidly restrained by the inner wall of the bearing housing 200, the first restraining part 210, and the second restraining part 220. Moreover, compared to existing O-rings, the first and second buffers 510 and 520 have a larger contact area with the bearing outer ring 110, especially covering the end face and corners of the outer ring, improving the structural strength of the entire bearing assembly and making it suitable for long-term high-speed rotation. In addition, the second restraining part 220 is a separate structure from the main body, facilitating assembly and meeting subsequent disassembly requirements, making it easy to replace worn-out buffers and reducing operating costs.

[0048] like Figure 1 and Figure 3 As shown, in one embodiment, the first radial buffer portion 511 and the second radial buffer portion 521 are axially spaced 400°, meaning the first buffer member 510 and the second buffer member 520 are independent of each other. The first buffer member 510 is a circumferentially extending annular structure with an L-shaped cross-section. The second buffer member 520 is also a circumferentially extending annular structure with an L-shaped cross-section. In one embodiment, the first buffer member 510 and the second buffer member 520 are made of rubber, corresponding to rubber rings.

[0049] To improve the radial limiting of bearing 100, such as Figure 3As shown, in one embodiment, the inner wall of the bearing housing 200 has a protruding heat-conducting portion 230 that approaches the outer ring 110 of the bearing. The heat-conducting portion 230 is located within the gap 400 between the first radial buffer portion 511 and the second radial buffer portion 521. Specifically, the heat-conducting portion 230 has an annular structure and is disposed on the inner wall of the main body. The heat-conducting portion 230 and the main body are integrally formed, or they are separately disposed relative to the main body, with the separate heat-conducting portion 230 abutting against each other. The material of the main body may be the same as or different from that of the heat-conducting portion 230. The heat-conducting part 230 also provides axial limiting for the first buffer 510 and the second buffer 520. On one hand, it serves to position the two buffers axially; on the other hand, the two buffers also react on the heat-conducting part 230 to limit its axial movement. The two ends of the heat-conducting part 230 abut against the two buffers, maximizing its axial length and thus increasing the contact area between the heat-conducting part 230 and the bearing outer ring 110, thereby improving heat dissipation efficiency. Specifically, the heat-conducting part 230 is close to the bearing outer ring 110. When the bearing 100 is operating, the bearing outer ring 110 deviates from its axis and abuts against the heat-conducting part 230, achieving radial limiting. Simultaneously, the heat generated by the bearing 100 can be quickly transferred through the heat-conducting part 230 to the bearing housing 200, and then from the bearing housing 200 to other components and / or the atmosphere, improving the bearing's heat dissipation efficiency.

[0050] like Figure 2 As shown, in another embodiment, the first buffer 510 and the second buffer 520 are integrated. The first buffer 510 and the second buffer 520 constitute an integrated buffer 500, which has a ring structure and a U-shaped cross-section. During installation, the bearing 100 is first nested inside the buffer 500 to form a whole, and then the whole is placed into the main body. This reduces the number of parts, further simplifies the structure, and increases the contact area between the buffer 500 and the bearing 100, resulting in a larger effective buffer area and further improving the vibration reduction and noise reduction effect.

[0051] See Figure 4 This application provides an electric motor, including a housing 300, a rotor 700, and a stator 600. The rotor 700 includes a motor shaft 710 and a permanent magnet 720 disposed on the outer periphery of the motor shaft 710. A first bearing 101 and a second bearing 102 supporting the rotation of the motor shaft 710 are sleeved on it. The housing 300 includes a cylindrical body, and a first end cover 310 and a second end cover 320 connected to the cylindrical body and respectively positioning and mounting the first bearing 101 and the second bearing 102. The first end cover 310 has a first bearing assembly space for assembling the first bearing 101. A first buffer member 510 and a second buffer member 520 are disposed in the first bearing assembly space to absorb the movement allowance of the first bearing 101. The structure of the first buffer member 510 and the second buffer member 520 is as described in the aforementioned embodiment.

[0052] To facilitate the assembly of the rotor 700 and stator 600, in one embodiment, the first end cover 310 and the cylinder are integrally formed and have a separately configured bearing housing 200 with a first bearing assembly space. The second end cover 320 and the cylinder are separately connected and fixed to each other by tight fit, snap-fit ​​connection, adhesive or welding.

[0053] The bearing housing 200 has a raised heat-conducting portion 230 on its inner wall, which protrudes and approaches the outer ring 110 of the bearing. Referring to the aforementioned embodiment, during operation, the heat generated by the bearing 100 can be quickly transferred to the bearing housing 200, and then from the bearing housing 200 to the housing 300 and / or the atmosphere, improving the motor's heat dissipation efficiency. In one embodiment, the heat-conducting portion 230 can apply radial constraint to the outer ring 110 of the bearing, maintaining the coaxiality between the motor shaft 710 and the bearing 100, reducing component wear, and simultaneously reducing heat generated by unnecessary friction.

[0054] The clearance fit between the motor, bearing, and bearing housing facilitates bearing assembly. Two buffer components provide axial and radial positioning of the bearing, preventing hard contact between the bearing and bearing housing. Furthermore, the elastic deformation of the buffer components reduces noise and vibration during motor operation. Finally, the bearing housing is equipped with a heat-conducting section to improve heat transfer efficiency between the bearing and the motor, thus enhancing heat dissipation.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0056] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A bearing assembly, characterized in that, The device includes a bearing, a bearing housing with bearing assembly space, and a first buffer and a second buffer disposed between the bearing housing and the bearing. The bearing includes an outer ring and an inner ring, and the outer ring has an outer peripheral surface, a first end face, and a second end face. The first buffer is an integrally formed ring structure, including a first radial buffer portion acting on the outer peripheral surface and a first axial buffer portion acting on the first end face; The second buffer is an integrally formed ring structure, including a second radial buffer portion acting on the outer peripheral surface and a second axial buffer portion acting on the second end face.

2. The bearing assembly according to claim 1, characterized in that, The first radial buffer portion and the second radial buffer portion are spaced apart axially.

3. The bearing assembly according to claim 2, characterized in that, The inner wall of the bearing housing has a raised heat-conducting portion that approaches the outer ring of the bearing, and the heat-conducting portion is located in the interval between the first radial buffer portion and the second radial buffer portion.

4. The bearing assembly according to claim 3, characterized in that, The heat-conducting part provides axial restraint for the first buffer and the second buffer.

5. The bearing assembly according to claim 3, characterized in that, The heat-conducting part is a separate part from the bearing housing.

6. The bearing assembly according to claim 1, characterized in that, The bearing housing includes a first limiting part and a second limiting part for axially positioning the bearing. The first axial buffer part is located between the first limiting part and the first end face, and the second axial buffer part is located between the second limiting part and the second end face.

7. The bearing assembly according to claim 6, characterized in that, At least one of the first limiting part and the second limiting part can be separated and disassembled.

8. The bearing assembly according to claim 1, characterized in that, The first and second buffer components are integrated into one unit.

9. An electric motor, characterized in that, The device includes a housing, a rotor, and a stator, with the stator surrounding the rotor. The rotor includes a motor shaft, on which a first bearing and a second bearing are fitted to support its rotation. The housing includes a first end cover and a second end cover for respectively positioning and mounting the first and second bearings. The first end cover has a first bearing assembly space for assembling the first bearing. The first bearing assembly space is provided with a first buffer and a second buffer to absorb the movement allowance of the first bearing. The first bearing includes an outer ring and an inner ring. The outer ring has an outer peripheral surface, a first end surface, and a second end surface. The first buffer is an integrally formed ring structure, including a first radial buffer portion acting on the outer peripheral surface and a first axial buffer portion acting on the first end face; The second buffer is an integrally formed ring structure, including a second radial buffer portion acting on the outer peripheral surface and a second axial buffer portion acting on the second end face.

10. The motor according to claim 9, characterized in that, The first end cover is provided with a bearing housing that is separately configured and has the first bearing assembly space.

11. The motor according to claim 10, characterized in that, The first radial buffer portion and the second radial buffer portion are spaced apart axially.

12. The motor according to claim 11, characterized in that, The inner wall of the bearing housing has a raised heat-conducting portion that approaches the outer ring of the bearing, and the heat-conducting portion is located in the interval between the first radial buffer portion and the second radial buffer portion.

13. The motor according to claim 12, characterized in that, The heat-conducting part provides axial restraint for the first buffer and the second buffer.

14. The motor according to claim 12, characterized in that, The heat-conducting part is a separate part from the bearing housing.

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