Bearing seat of motor and motor
By designing the elastic material and bearing chamber structure of the motor bearing seat, the deformation of the bearing seat is controlled, and the problems of deviation and friction of the motor shaft are solved, and the effect of reducing noise and chamber sweeping risks is achieved.
Patent Information
- Application Number
- CN202420389243.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-02-26
AI Technical Summary
In the existing motors, due to the elastic deformation of the bearing seat, the rotation shaft deviates from the preset axis, friction occurs between the stator and the rotor, and a chamber sweeping problem occurs.
A bearing seat for a motor is designed, which is made of elastic material and is equipped with a bearing chamber. The minimum radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber is not more than 3 mm to control the deformation of the bearing seat and reduce the friction between the stator and the rotor.
By reducing the deformation amount of the bearing seat, the possibility of the motor output shaft deviating from the predetermined axis is reduced, the friction between the stator and the rotor is reduced, the possibility of the motor sweeping problem is reduced, and the noise during the motor operation is reduced.
Smart Images
Figure CN222928195U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and particularly relates to a bearing seat of a motor and a motor. Background Art
[0002] There is a kind of existing motor, which includes a stator, a rotor, a housing, a bearing and a bearing seat. The rotating shaft of the rotor passes through the bearing and rotates relative to the bearing. The bearing is installed in the bearing seat, and the bearing seat is installed on the housing. The bearing seat is made of rubber material and mainly plays a role in supporting and shock absorption.
[0003] Since the bearing seat has a certain elasticity, the bearing seat can be deformed. In this kind of motor, there is a radial electromagnetic force between the stator and the rotor. Under the action of the electromagnetic force, the rotating shaft of the rotor easily presses the bearing seat to deform the bearing seat, so that the rotating shaft deviates from the preset axis, resulting in the problem of rubbing between the stator and the rotor and causing the problem of stator-rotor rubbing. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide a bearing seat of a motor, aiming at reducing the possibility of stator-rotor rubbing of the motor.
[0005] To achieve the above purpose, the bearing seat of the motor proposed by the utility model is made of an elastic material. The bearing seat is provided with a bearing chamber for accommodating the bearing. The minimum radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber is less than or equal to 3 mm.
[0006] Optionally, the minimum radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber is greater than or equal to 1 mm.
[0007] Optionally, the bearing chamber has an arc-shaped inner wall, and the arc-shaped inner wall protrudes towards the direction close to the outer peripheral wall of the bearing seat. The radial distance between the farthest end of the arc-shaped inner wall away from the axis of the bearing chamber and the outer peripheral wall of the bearing seat forms the minimum radial distance.
[0008] Optionally, the bearing seat includes:
[0009] A seat body part provided with the bearing chamber; and
[0010] A clamping part provided at one end of the seat body part.
[0011] Optionally, the seat body part includes a first sub-section and a second sub-section. The second sub-section connects the first sub-section and the clamping part, and the outer diameter of the second sub-section decreases from the end close to the first sub-section to the end close to the clamping part.
[0012] Optionally, the clamping part is provided with a guiding inclined surface, and the guiding inclined surface is provided at the end of the clamping part away from the seat body part.
[0013] Optionally, the bearing seat is made of rubber.
[0014] The utility model also provides a motor, comprising:
[0015] The bearing seat of the above-mentioned motor;
[0016] A housing is provided with a receiving cavity and an assembly hole communicating with the receiving cavity, wherein the bearing seat is fixed inside the assembly hole; and
[0017] A bearing is disposed inside the bearing chamber; and
[0018] The output shaft is inserted into the receiving cavity, and the output shaft is plug-fitted with the bearing.
[0019] Optionally, the outer peripheral wall of the bearing seat is interference fit with the assembly hole.
[0020] Optionally, the outer peripheral wall of the bearing is interference fit with the bearing chamber.
[0021] The bearing seat in a technical solution of an embodiment of the utility model is applied to a motor. When the output shaft of the motor rotates, the output shaft and the bearing rotate relative to each other. The bearing is arranged in the bearing chamber of the bearing seat. Since the bearing seat is made of elastic material and has a certain deformation capacity, the rigid collision between the bearing and the bearing seat caused by the jumping during the rotation of the output shaft can be changed into a flexible collision, thereby supporting and absorbing the bearing and reducing the noise during the operation of the motor. The radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber refers to the distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber along the radial direction of the bearing chamber, that is, the wall thickness of the bearing seat in the radial direction of the bearing chamber. It can be understood that if the wall thickness of the bearing seat is thicker, the deformation amount of the bearing seat can be greater, the output shaft deviates from the predetermined axis under the attraction of the electromagnetic force between the stator and the rotor, and the possibility of friction between the stator and the rotor is greater, resulting in the problem of bore sweeping. Therefore, in this solution, the minimum radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber is set to no more than 3mm, that is, the thinnest part of the bearing seat wall in the radial direction of the bearing chamber is no more than 3mm, so that the deformation amount of the bearing seat in the radial direction is small, thereby reducing the distance that the output shaft of the motor may deviate from the predetermined axis, thereby reducing the possibility of friction between the stator and the rotor, and reducing the possibility of the motor having a bore-sweeping problem. On the other hand, the distance that the output shaft of the motor may deviate from the predetermined axis is small, so that the possible jump of the output shaft of the motor during rotation is more minor, further reducing the noise during the operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.
[0023] Figure 1 It is a cross-sectional view of a bearing seat of a motor according to an embodiment of the present invention;
[0024] Figure 2 It is a cross-sectional view of a motor according to an embodiment of the present invention;
[0025] Figure 3 For Figure 2 The partial enlarged view at position A in
[0026] Figure 4 For Figure 2 The partial enlarged view at position B in
[0027] Figure 5 It is a schematic structural view of a bearing seat of a motor according to an embodiment of the present invention.
[0028] Explanation of the reference numerals in the drawings:
[0029] Reference numeral Name Reference numeral Name 100 Bearing housing 110 Housing body part 1101 Bearing chamber 1102 Arc-shaped inner wall 111 First sub-segment 112 Second sub-segment 120 Snap-in part 121 Snap-in head 1211 Lead-in inclined surface 122 Groove 200 Bearing 300 Shell 400 Output shaft
[0030] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.
[0033] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0035] The present utility model provides a bearing housing for a motor.
[0036] Referring to Figures 1 to 2 , Figure 1 is a cross-sectional view of an embodiment of the bearing housing of the motor of the present utility model, Figure 2 is a cross-sectional view of an embodiment of the motor of the present utility model.
[0037] In the embodiment of the present utility model, the bearing housing 100 of the motor is made of an elastic material. The bearing housing 100 is provided with a bearing chamber 1101 for accommodating a bearing 200, and the minimum radial distance between the outer peripheral wall of the bearing housing 100 and the inner wall of the bearing chamber 1101 is less than or equal to 3 mm.
[0038] The bearing seat 100 in a technical solution of an embodiment of the utility model is applied to a motor. When the output shaft 400 of the motor rotates, the output shaft 400 and the bearing 200 rotate relative to each other. The bearing 200 is arranged in the bearing chamber 1101 of the bearing seat 100. Since the bearing seat 100 is made of elastic material and has a certain deformation ability, the rigid collision between the bearing 200 and the bearing seat 100 caused by the jumping of the output shaft 400 during the rotation can be changed into a flexible collision, thereby supporting and absorbing the bearing 200 and reducing the noise during the operation of the motor. The radial distance between the outer peripheral wall of the bearing seat 100 and the inner wall of the bearing chamber 1101 refers to the distance between the outer peripheral wall of the bearing seat 100 and the inner wall of the bearing chamber 1101 along the radial direction of the bearing chamber 1101, that is, the wall thickness of the bearing seat 100 in the radial direction of the bearing chamber 1101. It is understandable that if the wall thickness of the bearing seat 100 is thicker, the deformation amount of the bearing seat 100 will be greater, the output shaft 400 will deviate from the predetermined axis under the electromagnetic force attraction between the stator and the rotor, and the possibility of friction between the stator and the rotor will be greater, thus causing the problem of bore scraping. Therefore, in this solution, the minimum radial distance between the outer peripheral wall of the bearing seat 100 and the inner wall of the bearing chamber 1101 is set to be no more than 3mm, that is, the thinnest part of the wall thickness of the bearing seat 100 in the radial direction of the bearing chamber 1101 is no more than 3mm, and the minimum radial distance is as follows: Figure 1 As shown at the middle t (the midpoint of the arc in the cross-sectional view), the deformation amount of the bearing seat 100 that can be deformed in the radial direction is small, thereby reducing the distance that the output shaft 400 of the motor may deviate from the predetermined axis, thereby reducing the possibility of friction between the stator and the rotor, and reducing the possibility of the motor having a bore-sweeping problem. On the other hand, the distance that the output shaft 400 of the motor may deviate from the predetermined axis is small, so that the possible jump of the output shaft 400 of the motor during rotation is more slight, further reducing the noise during the operation of the motor.
[0039] In this embodiment, the bearing seat 100 is made of elastic material, generally rubber, resin, plastic, etc.
[0040] Optionally, the minimum radial distance between the outer peripheral wall of the bearing seat 100 and the inner wall of the bearing chamber 1101 is greater than or equal to 1 mm.
[0041] In this embodiment, the minimum radial distance between the outer peripheral wall of the bearing housing 100 and the inner wall of the bearing chamber 1101 is not less than 1 mm, which avoids the too thin wall thickness of the bearing housing 100. On the one hand, it ensures the strength of the bearing housing 100, reduces the possibility of damage to the bearing housing 100, and thus ensures the service life of the bearing housing 100; on the other hand, the thinner the wall thickness, the greater the manufacturing difficulty of the bearing housing 100. Setting the minimum radial distance between the outer peripheral wall of the bearing housing 100 and the inner wall of the bearing chamber 1101 to not less than 1 mm reduces the manufacturing difficulty of the bearing housing 100 and the manufacturing cost of the bearing housing 100; on the other hand, too thin a wall thickness will cause the shock absorption function of the bearing housing to decline. Although the problem of rubbing against the stator is avoided, it will cause an increase in noise. Specifically in this embodiment, the minimum radial distance between the outer peripheral wall of the bearing housing 100 and the inner wall of the bearing chamber 1101 is 1 mm.
[0042] The experimental data is as follows:
[0043]
[0044]
[0045] Referring to the above table data, under the same other conditions, the corresponding noise levels when the minimum radial distances are 6 mm, 5.2 mm, 3.7 mm, 3 mm, 2.2 mm, 1.6 mm, 1 mm, and 0.7 mm can be seen. When the range of the minimum radial distance is between 1 mm and 3 mm, the noise level of the motor is significantly reduced.
[0046] Optionally, the bearing chamber 1101 has an arc-shaped inner wall 1102, and the arc-shaped inner wall 1102 protrudes towards the direction of the outer peripheral wall of the bearing housing 100. The radial distance between the outermost end of the arc-shaped inner wall 1102 away from the axis of the bearing chamber 1101 and the outer peripheral wall of the bearing housing 100 forms the minimum radial distance.
[0047] Please combine Figures 1 to 4 , in this embodiment, the shape of the bearing chamber 1101 corresponds to the shape of the bearing 200 of the motor. The bearing 200 has an arc-shaped outer wall, and the bearing chamber 1101 has an arc-shaped inner wall 1102. When the output shaft 400 of the motor rotates relative to the bearing 200, the arc-shaped inner wall 1102 can provide a more uniform supporting force for the bearing 200 and improve the rotational stability of the output shaft 400.
[0048] Optionally, the bearing housing 100 includes:
[0049] A seat body part 110, provided with a bearing chamber 1101; and
[0050] A clamping part 120, provided at one end of the seat body part 110.
[0051] Please refer to Figure 1, in this embodiment, the bearing housing 100 includes a housing portion 110 and a clamping portion 120. The bearing chamber 1101 is provided in the housing portion 110, and the clamping portion 120 is provided at one end of the housing portion 110 for clamping with the housing 300 of the motor, which improves the connection strength between the bearing housing 100 and the housing 300, and makes the bearing housing 100 easy to disassemble and assemble, thereby improving the assembly efficiency of the motor. Specifically, in this embodiment, the clamping portion 120 includes a clamping head 121, and the clamping head 121 is in interference fit with the housing 300 of the motor, thereby reducing the possibility of the bearing housing 100 being separated from the housing 300. Refer to Figures 3 to 5 , the clamping portion 120 is further provided with a groove 122, which cooperates with the protrusion on the housing 300, further improving the connection strength between the bearing housing 100 and the housing 300 and reducing the possibility of the bearing housing 100 falling off.
[0052] Optionally, the housing portion 110 includes a first sub-section 111 and a second sub-section 112. The second sub-section 112 connects the first sub-section 111 and the clamping portion 120, and the outer diameter of the second sub-section 112 decreases from the end close to the first sub-section 111 to the end close to the clamping portion 120.
[0053] Please refer to Figure 5 , in this embodiment, the housing portion 110 includes a first sub-section 111 and a second sub-section 112, and the outer diameter of the second sub-section 112 decreases from the end close to the first sub-section 111 to the end close to the clamping portion 120, so that an inclined surface is formed at one end of the housing portion 110 close to the clamping portion 120. When disassembling the bearing housing 100, the inclined surface can play a certain guiding role, facilitating the disassembly of the bearing housing 100, thereby improving the convenience of motor maintenance.
[0054] Optionally, the clamping portion 120 is provided with a guiding inclined surface 1211, and the guiding inclined surface 1211 is provided at the end of the clamping portion 120 away from the housing portion 110.
[0055] Please refer to Figure 5 , in this embodiment, a guiding inclined surface 1211 is provided at the end of the clamping portion 120 away from the housing portion 110. During the assembly process of the bearing housing 100 and the housing 300 of the motor, the guiding inclined surface 1211 abuts against the housing 300 of the motor to play a guiding role, making it easier for the bearing housing 100 to be inserted into the assembly hole provided in the housing 300, and making it more labor-saving when assembling the bearing housing 100, thereby improving the assembly efficiency of the motor. Specifically, in this embodiment, the guiding inclined surface 1211 is provided at the end of the clamping head 121 facing away from the housing portion 110.
[0056] Optionally, the material of the bearing housing 100 is rubber.
[0057] In this embodiment, the bearing housing 100 is made of rubber material, so that the bearing housing 100 has good seismic performance, reduces the vibration of the output shaft 400, and reduces noise. On the other hand, the rubber material has strong adaptability, so that the bearing housing 100 can adapt to a wider temperature environment, and the rubber material is easy to obtain, easy to mold, and has low manufacturing cost.
[0058] The present utility model also provides a motor, including:
[0059] The bearing housing 100 of the above-mentioned motor;
[0060] A housing 300, provided with a receiving cavity and an assembly hole communicating with the receiving cavity, and the bearing housing 100 is fixed inside the assembly hole; and
[0061] A bearing 200, arranged inside the bearing chamber 1101; and
[0062] An output shaft 400, passing through the receiving cavity, and the output shaft 400 is inserted and adapted to the bearing 200.
[0063] For the specific structure of the bearing housing 100 of this motor, refer to the above-mentioned embodiment. Since this motor adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one. Refer to Figure 2 , the housing 300 is provided with a receiving cavity, the stator of the motor is fixed inside the receiving cavity, the rotor is arranged at intervals inside the stator, the output shaft 400 is connected to the rotor and one end of the output shaft 400 extends out of the receiving cavity. Among them, the bearing housing 100 and the corresponding bearing 200 can be assembled at the extending end of the output shaft 400, or can be assembled at the non-extending end of the output shaft 400. Specifically in this embodiment, the bearing 200 adopts a plastic sliding bearing 200, and the output shaft 400 passes through the bearing 200 and can rotate relative to the bearing 200.
[0064] Optionally, the outer peripheral wall of the bearing housing 100 is in interference fit with the assembly hole.
[0065] In this embodiment, the bearing housing 100 is fixed in the assembly hole by an interference fit method, reducing the possibility of the bearing housing 100 moving in the assembly hole, thereby reducing the possibility of problems such as skewing or side shifting of the bearing 200 and the output shaft 400 of the motor, and further improving the stability of the motor operation. And the structure for realizing the interference fit is relatively simple, the manufacturing difficulty is low, which is beneficial to reducing the manufacturing cost of the motor.
[0066] Optionally, the outer peripheral wall of the bearing 200 is in interference fit with the bearing chamber 1101.
[0067] In this embodiment, an interference fit is adopted to fix the bearing 200 in the bearing housing 1101, reducing the possibility of the bearing 200 moving within the bearing housing 1101, thereby reducing the possibility of problems such as skew or lateral displacement of the output shaft 400 of the motor, and further improving the stability of the motor operation. Moreover, the structure for achieving the interference fit is relatively simple and the manufacturing difficulty is low, which is beneficial to reducing the manufacturing cost of the motor.
[0068] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A bearing seat of a motor, characterized in that: The bearing seat is made of elastic material, and is provided with a bearing chamber for accommodating a bearing, wherein a minimum radial distance between an outer peripheral wall of the bearing seat and an inner wall of the bearing chamber is less than or equal to 3 mm; Wherein, the bearing chamber has an arc-shaped inner wall, which protrudes toward the outer peripheral wall of the bearing seat, and the radial distance between the farthest end of the arc-shaped inner wall away from the bearing chamber axis and the outer peripheral wall of the bearing seat forms the minimum radial distance.
2. The bearing seat of the motor according to claim 1, characterized in that: The minimum radial distance between the outer peripheral wall of the bearing seat and the inner wall of the bearing chamber is greater than or equal to 1 mm.
3. The bearing seat of the motor according to claim 1, characterized in that: The bearing seat comprises: The seat body is provided with the bearing chamber; and The clamping portion is arranged at one end of the seat body.
4. The bearing seat of the motor according to claim 3, characterized in that: The seat body includes a first sub-segment and a second sub-segment, the second sub-segment connects the first sub-segment and the clamping portion, and the outer diameter of the second sub-segment decreases from an end close to the first sub-segment to an end close to the clamping portion.
5. The bearing seat of the motor according to claim 3, characterized in that: The clamping portion is provided with an introduction slope, and the introduction slope is arranged at an end of the clamping portion away from the seat body.
6. The bearing seat of the motor according to claim 1, characterized in that: The bearing seat is made of rubber.
7. A motor, characterized in that: include: The bearing seat of the motor according to any one of claims 1 to 6; A housing is provided with a receiving cavity and an assembly hole communicating with the receiving cavity, wherein the bearing seat is fixed inside the assembly hole; and a bearing disposed inside the bearing chamber; and The output shaft is inserted into the receiving cavity, and the output shaft is plug-fitted with the bearing.
8. The motor according to claim 7, characterized in that The outer peripheral wall of the bearing seat is interference fit with the assembly hole.
9. The motor according to claim 7, characterized in that The outer peripheral wall of the bearing is interference fit with the bearing chamber.