Rotor assembly and motor using same
By setting a step portion in the rotor assembly and combining it with a motor limiter, an interference fit, and an elastic part, the problem of reduced bearing preload due to the drag force of the impeller is solved, thereby achieving silent operation and extending the life of the motor.
Patent Information
- Application Number
- CN202422817129.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-19
AI Technical Summary
The impeller drag force causes the preload between the bearing and the motor of the rotor assembly to decrease or fail, generating noise and vibration, which affects the quality and life of the motor.
A step portion is provided in the rotor assembly, and the step portion contacts the motor to limit the bearing module. The interference fit, adhesive layer or clip-on component is combined to enhance the connection strength, and an elastic component is used to achieve relative limitation.
It effectively prevents the preload force between the bearing and the motor from decreasing or failing, reduces motor operating noise and vibration, improves motor quality and extends motor service life.
Smart Images
Figure CN223402319U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to a rotor assembly and a motor using the same. Background Art
[0002] During the use of the motor, due to the continuous rotation of the impeller, the shaft of the rotor assembly will tend to move toward the impeller due to the drag force of the impeller, resulting in a reduction or even failure of the preload force between the bearing on the shaft and the motor. As a result, the motor will generate greater noise and vibration during operation, and the motor energy consumption will increase, which greatly reduces the quality of the motor and shortens the service life of the motor. Utility Model Content
[0003] One object of the present application is to overcome the deficiencies of the prior art and to provide a rotor assembly capable of preventing failure of the preload force between the bearing and the motor.
[0004] The present application provides a rotor assembly that adopts the following technical solution:
[0005] A rotor assembly comprises a rotor body, a rotating shaft coaxially passing through the rotor body, and a bearing module sleeved on the rotating shaft, wherein a step portion is provided on one end side of the bearing module.
[0006] By adopting the above technical solution, when the rotor assembly is installed in the motor, the step portion can contact the motor and limit the bearing module, thereby avoiding the reduction or failure of the preload force between the bearing module and the motor, effectively reducing the noise and vibration during motor operation, improving the quality of the motor, and extending the service life of the motor.
[0007] In a specific possible implementation scheme, the step portion is coaxially arranged on one end circumferential side of the bearing module.
[0008] By adopting the above technical solution, the peripheral side portions of the bearing module can all come into contact with the motor through the step portions, thereby improving the limiting effect of the step portions.
[0009] In a specific possible implementation scheme, the step portion is integrally formed with the bearing module.
[0010] By adopting the above technical solution, the connection strength between the step portion and the bearing module is improved, preventing the step portion from separating from the bearing module during use and affecting its limiting effect on the bearing module.
[0011] In a specific possible implementation scheme, the rotating shaft passes through the inner ring of the bearing module and has an interference fit with the inner ring.
[0012] By adopting the above technical solution, the connection strength between the inner ring of the bearing module and the rotating shaft is effectively improved, and relative displacement between the bearing module and the rotating shaft is avoided to affect the rotation of the rotor body.
[0013] In a specific possible implementation scheme, the rotating shaft is inserted into the inner ring of the bearing module, and an adhesive layer is provided between the outer wall of the rotating shaft and the inner wall of the inner ring.
[0014] By adopting the above technical solution, the connection strength between the inner ring of the bearing module and the rotating shaft is effectively improved, and relative displacement between the bearing module and the rotating shaft is avoided to affect the rotation of the rotor body.
[0015] In a specific possible implementation scheme, the rotating shaft passes through the inner ring of the bearing module, and a clamping member is provided between the rotating shaft and the inner ring.
[0016] By adopting the above technical solution, the connection strength between the inner ring of the bearing module and the rotating shaft is effectively improved, and relative displacement between the bearing module and the rotating shaft is avoided to affect the rotation of the rotor body.
[0017] In a specific possible implementation scheme, the clamping member includes a clamping groove annularly opened on the rotating shaft, and a clamping spring inscribed on the inner wall of the inner ring, and the clamping spring is embedded in the clamping groove.
[0018] In a specific possible implementation scheme, the bearing module includes a first bearing and a second bearing arranged axially along the rotating shaft, and an elastic member is provided between the first bearing and the second bearing. The elastic member is sleeved on the rotating shaft and its two ends are respectively connected to the outer ring of the first bearing and the outer ring of the second bearing.
[0019] By adopting the above technical solution, the outer ring of the first bearing and the outer ring of the second bearing can be relatively limited under the action of the elastic member, which can further avoid the reduction or failure of the preload force between the bearing module and the motor.
[0020] Another object of the present application is to provide a motor.
[0021] The motor provided in this application adopts the following technical solution:
[0022] A motor comprises a motor body, an impeller is provided on the motor body, a mounting seat is further provided on the motor body, and the rotor assembly as described above, the rotating shaft is passed through the mounting seat and its two ends are respectively connected to the rotor body and the impeller, the bearing module is accommodated in the mounting seat, the step portion is provided at an end of the bearing module away from the impeller, and the step portion conflicts with the end of the mounting seat.
[0023] By adopting the above technical solution, the step portion can contact the mounting seat and limit the bearing module, thereby avoiding the reduction or failure of the preload force between the bearing module and the motor body, effectively reducing the noise and vibration during motor operation, improving the quality of the motor, and extending the service life of the motor.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] When the rotor assembly is installed in the motor, the step portion can contact the motor and limit the bearing module, thereby avoiding the reduction or failure of the preload force between the bearing module and the motor, effectively reducing the noise and vibration during motor operation, improving the quality of the motor, and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a structural schematic diagram of the rotor assembly in Example 1 of the present application.
[0027] Figure 2 It is a schematic axial cross-sectional view of the motor in Example 2 of the present application.
[0028] Description of reference numerals:
[0029] 1. Rotor body; 2. Rotating shaft; 3. Bearing module; 31. First bearing; 32. Second bearing; 4. Step portion; 5. Elastic member;
[0030] 100. Motor body; 101. Impeller; 102. Mounting seat; 103. Stator. DETAILED DESCRIPTION
[0031] The present application is further described in detail below with reference to the accompanying drawings.
[0032] Example 1: See Figure 1 As shown, a rotor assembly is shown, which includes a rotor body 1, a rotating shaft 2 coaxially inserted into the rotor body 1, and a bearing module 3 sleeved on the rotating shaft 2. The bearing module 3 is provided with a step portion 4 on the side of one end close to the rotor body 1. When the rotor assembly is installed in the motor, the step portion 4 is located at the end of the bearing module 3 away from the impeller. It can abut against the motor and limit the bearing module 3, thereby preventing the preload force between the bearing module 3 and the motor from being reduced or failing, effectively reducing the noise and vibration during motor operation, improving the quality of the motor, and extending the service life of the motor.
[0033] In this embodiment, the step portion 4 is integrally formed with the bearing module 3 and coaxially arranged around one end of the bearing module 3. The integrally formed step portion 4 provides a high connection strength between the step portion 4 and the bearing module 3, preventing the step portion 4 from separating from the bearing module 3 during use and affecting its retaining effect on the bearing module 3. Furthermore, the peripheral side of the bearing module 3 can contact the motor through the step portion 4, thereby enhancing the retaining effect of the step portion 4.
[0034] In this embodiment, the rotating shaft 2 is inserted into the inner ring of the bearing module 3 and has an interference fit with the inner ring. This effectively improves the connection strength between the inner ring of the bearing module 3 and the rotating shaft 2, preventing relative displacement between the bearing module 3 and the rotating shaft 2 that could affect the rotation of the rotor body 1.
[0035] In other embodiments, an adhesive layer or a clamping member (not shown) is provided between the outer wall of the rotating shaft 2 and the inner wall of the inner ring. The adhesive layer and the clamping member can also secure the inner ring of the bearing module 3 to the rotating shaft 2. The adhesive layer is glue, and the clamping member includes a groove annularly formed on the rotating shaft 2 and a retaining spring internally connected to the inner wall of the inner ring, with the retaining spring embedded in the groove.
[0036] In this embodiment, the bearing module 3 includes a first bearing 31 and a second bearing 32 arranged along the axial direction of the rotating shaft 2. The first bearing 31 is arranged close to the rotor body 1. The step portion 4 is arranged at one end of the first bearing 31 away from the second bearing 32. An elastic member 5 is arranged between the first bearing 31 and the second bearing 32. The elastic member 5 is a wave spring. The elastic member 5 is sleeved on the rotating shaft 2 and its two ends are respectively connected to the outer ring of the first bearing 31 and the outer ring of the second bearing 32.
[0037] In this way, the outer ring of the first bearing 31 and the outer ring of the second bearing 32 can be relatively limited under the action of the elastic member 5, so that the first bearing 31 and the second bearing 32 can be combined into an assembled bearing through the elastic member 5, further avoiding the reduction or failure of the preload force between the bearing module 3 and the motor.
[0038] Example 2: See Figure 2 , which shows a motor including a motor body 100, on which an impeller 101, a mounting seat 102, and the rotor assembly of Example 1 are provided. The mounting seat 102 is coaxially arranged on the motor body 100, and the rotating shaft 2 is coaxially arranged in the mounting seat 102 with its two ends respectively connected to the rotor body 1 and the impeller 101. The rotor body 1 is surrounded by a stator 103, and a bearing module 3 is accommodated in the mounting seat 102. A step portion 4 is provided at an end of the bearing module 3 away from the impeller 101, and the step portion 4 abuts against the end of the mounting seat 102.
[0039] When the motor is running, the step portion 4 can contact the mounting seat 102 and limit the bearing module 3, thereby avoiding the reduction or failure of the preload force between the bearing module 3 and the motor body 100, effectively reducing the noise and vibration during the operation of the motor, improving the quality of the motor, and extending the service life of the motor.
[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A rotor assembly, comprising a rotor body (1), a rotating shaft (2) coaxially passing through the rotor body (1), and a bearing module (3) sleeved on the rotating shaft (2), characterized in that: A step portion (4) is provided on one end side of the bearing module (3).
2. A rotor assembly according to claim 1, characterized in that: The step portion (4) is coaxially arranged on one end circumferential side of the bearing module (3).
3. A rotor assembly according to claim 1, characterized in that: The step portion (4) and the bearing module (3) are integrally formed.
4. A rotor assembly according to claim 1, characterized in that: The rotating shaft (2) is inserted into the inner ring of the bearing module (3) and is interference-fitted with the inner ring.
5. The rotor assembly according to claim 1, characterized in that: The rotating shaft (2) is inserted into the inner ring of the bearing module (3), and an adhesive layer is provided between the outer wall of the rotating shaft (2) and the inner wall of the inner ring.
6. The rotor assembly according to claim 1, characterized in that: The rotating shaft (2) is inserted into the inner ring of the bearing module (3), and a clamping member is provided between the rotating shaft (2) and the inner ring.
7. A rotor assembly according to claim 6, characterized in that: The clamping member comprises a clamping groove annularly opened on the rotating shaft (2), and a clamping spring inscribed on the inner wall of the inner ring, wherein the clamping spring is embedded in the clamping groove.
8. A rotor assembly according to any one of claims 1 to 7, characterized in that: The bearing module (3) comprises a first bearing (31) and a second bearing (32) arranged along the axial direction of the rotating shaft (2); an elastic member (5) is provided between the first bearing (31) and the second bearing (32); the elastic member (5) is sleeved on the rotating shaft (2) and its two ends are respectively connected to the outer ring of the first bearing (31) and the outer ring of the second bearing (32).
9. A motor comprising a motor body (100), wherein an impeller (101) is provided on the motor body (100), characterized in that: The motor body (100) is further provided with a mounting seat (102) and a rotor assembly as described in any one of claims 1 to 8, the rotating shaft (2) is passed through the mounting seat (102) and its two ends are respectively connected to the rotor body (1) and the impeller (101), the bearing module (3) is accommodated in the mounting seat (102), the step portion (4) is provided at an end of the bearing module (3) away from the impeller (101), and the step portion (4) is in conflict with the end of the mounting seat (102).