CN220874338U - Noise reduction rotor assembly and actuator thereof - Google Patents
Noise reduction rotor assembly and actuator thereof Download PDFInfo
- Publication number
- CN220874338U CN220874338U CN202322658395.1U CN202322658395U CN220874338U CN 220874338 U CN220874338 U CN 220874338U CN 202322658395 U CN202322658395 U CN 202322658395U CN 220874338 U CN220874338 U CN 220874338U
- Authority
- CN
- China
- Prior art keywords
- hole
- rotor
- rotor assembly
- central
- axial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003860 storage Methods 0.000 claims abstract description 11
- 239000004519 grease Substances 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 11
- 230000001050 lubricating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A noise reduction rotor assembly and an actuator therefor. The noise reduction rotor assembly comprises a rotor body and a supporting block; the rotor body is provided with an axial through hole extending along the axial direction, the axial through hole is a step hole, the axial through hole comprises a large hole and a small hole, and a step surface is formed between the large hole and the small hole; the supporting block is arranged in the big hole and is connected with the rotor body; the bottom surface of the supporting block is provided with a protruding part and an oil storage groove, the protruding part is abutted against the step surface, and the oil storage groove stores grease; the support block has an axially extending central through bore, the central through bore and the aperture for the rotor shaft to pass through. The utility model has low running noise.
Description
Technical Field
The present utility model relates to actuator technology.
Background
As the requirements of users on the comfort of the automobile driving environment are higher, the requirements on the working noise of an actuator are also higher and higher. In the vehicle actuator, because the clearance fit is adopted between the inner hole of the rotor and the rotor shaft, in the rotating process of the motor rotor, the noise is generated by the high-frequency impact of the inner hole of the rotor and the rotor shaft because of the radial unbalanced magnetic field force, and the larger the fit clearance is, the larger the noise is.
Disclosure of Invention
The utility model aims to provide a rotor assembly with low running noise and an actuator thereof.
The embodiment of the utility model provides a noise reduction rotor assembly, which comprises a rotor body and a supporting block; the rotor body is provided with an axial through hole extending along the axial direction, the axial through hole is a step hole, the axial through hole comprises a large hole and a small hole, and a step surface is formed between the large hole and the small hole; the supporting block is arranged in the big hole and is connected with the rotor body; the bottom surface of the supporting block is provided with a protruding part and an oil storage groove, the protruding part is abutted against the step surface, and the oil storage groove stores grease; the support block has an axially extending central through bore, the central through bore and the aperture for the rotor shaft to pass through.
The embodiment of the utility model also provides an actuator, which comprises a shell and a rotor shaft, wherein the shell is provided with an inner cavity, the actuator further comprises the noise-reducing rotor assembly, and the noise-reducing rotor assembly and the rotor shaft are arranged in the inner cavity; the rotor shaft passes through the center through hole of the support block and the small hole of the rotor body, the two ends of the rotor shaft are respectively fixed at the top and the bottom of the shell, and the rotor shaft is in clearance fit with the center through hole of the support block and the small hole of the rotor body.
The utility model has at least the following technical effects:
1. The supporting block is provided with the oil storage groove, lubricating grease can be stored, an oil injection space is formed between the bottom surface of the supporting block and the step surface after the supporting block is assembled with the rotor body, the lubricating grease is thrown out and makes up the fit clearance between the rotor shaft and the shaft hole under the drive of the rotating centrifugal force of the rotor, a lubricating oil film can absorb part of energy, the concentrated load can be partially converted into the distributed load, the friction between the rotor shaft and the shaft hole is reduced, the long-time carrying and the long-time long-term lubrication can be kept, and the effects of shock absorption and noise elimination are achieved;
2. The length of the inner hole of the clearance fit between the traditional rotor (especially the plastic rotor) and the rotor shaft is long, the precision of the whole rotor inner hole is difficult to control, and the noise problem caused by overlarge clearance between a certain position of the rotor inner hole and the rotor shaft is easy to occur. The embodiment of the utility model can avoid the noise problem caused by overlarge gap between the inner hole of the rotor and the rotor shaft by only controlling the precision of the central through hole of the supporting block (the gap between the central through hole of the supporting block and the rotor shaft is smaller than the gap between the small hole of the rotor body and the rotor shaft), thereby reducing the manufacturing difficulty.
Drawings
FIG. 1 illustrates a schematic cross-sectional view of a noise reducing rotor assembly according to an embodiment of the present utility model.
Fig. 2 shows a schematic perspective view of a support block according to an embodiment of the present utility model.
FIG. 3 illustrates a schematic view of a noise reduction rotor assembly of an embodiment of the present utility model assembled to an actuator.
Fig. 4 shows a schematic top view of an actuator according to an embodiment of the utility model.
Figure 5 shows a schematic view of section A-A of figure 4.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
Please refer to fig. 1 to 3. The noise reduction rotor assembly 100 according to an embodiment of the present utility model includes a rotor body 1 and a support block 2.
The rotor body 1 has an axial through hole 10 extending in the axial direction, the axial through hole 10 is a stepped hole, the axial through hole includes a large hole 101 and a small hole 102, and a stepped surface 103 is formed between the large hole 101 and the small hole 102.
The support block 2 is disposed in the large hole 101 and is connected to the rotor body 1. In the present embodiment, the outer peripheral surface of the supporting block 2 is in interference fit with the hole wall of the large hole 101, but not limited thereto, other connection methods, such as riveting, may be used.
The bottom surface of supporting shoe 2 is equipped with bellying 21 and oil storage recess 22, bellying 21 butt step face 103 for form oiling space g between the bottom surface of supporting shoe 2 and step face 103. The oil reservoir 22 stores oil therein, which is provided to help keep the oil continuously and stably in the rotor assembly. The support block 2 also has a central through hole 20 extending in the axial direction, the central through hole 20 and the small hole 102 being for the rotor shaft to pass through. In a specific embodiment, the apertures of the central through hole 20 and the small hole 102 are the same.
In this embodiment, the boss 21 includes a plurality of radially extending ribs 211. In the example of fig. 2, the number of the ribs 211 is four, the four ribs 211 are uniformly distributed around the central through hole 20, and the aforementioned oil storage groove 22 is provided between each two adjacent ribs 211.
In this embodiment, the rotor body 1 and the supporting block 2 are made of plastic. The rotor body 1 includes a thick portion 11 having a larger outer diameter and a thin portion 12 having a smaller outer diameter. The large hole 101 is provided in the thick portion 11, and the small hole 102 is provided in the thin portion 12. The outer peripheral surface of the thick portion 11 is provided with a plurality of permanent magnets 13 at intervals in the circumferential direction.
Further, the hole wall of the large hole 101 is provided with an annular step 104, and the large hole 101 is divided into a fine hole 1011 and a coarse hole 1012 by taking the annular step 104 as a boundary, and the fine hole 1011 is adjacent to the small hole 102. The support block 2 is disposed in the fine hole 1011.
Please refer to fig. 4 and 5. The actuator 200 according to the present embodiment includes a housing 3, a rotor shaft 4, and the noise reduction rotor assembly 100.
The housing 3 has an inner cavity 30, and the noise reducing rotor assembly 100 and the rotor shaft 4 are disposed in the inner cavity 30. The rotor shaft 4 passes through the central through hole 20 of the supporting block 2 and the small hole 102 of the rotor body 1, the two ends of the rotor shaft 4 are respectively fixed at the top and the bottom of the shell 3, and the rotor shaft 4 is in clearance fit with the central through hole 20 of the supporting block and the small hole 102 of the rotor body.
The supporting block is provided with the oil storage groove, lubricating grease can be stored, an oil injection space is formed between the bottom surface of the supporting block and the step surface after the supporting block is assembled with the rotor body, the lubricating grease is thrown out and makes up the fit clearance between the rotor shaft and the shaft hole under the drive of the rotating centrifugal force of the rotor, a lubricating oil film can absorb part of energy, the concentrated load can be partially converted into the distributed load, the friction between the rotor shaft and the shaft hole is reduced, the long-time carrying motion can be kept, and the effects of shock absorption and noise elimination are achieved.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. The noise reduction rotor assembly is characterized by comprising a rotor body and a supporting block;
The rotor body is provided with an axial through hole extending along the axial direction, the axial through hole is a step hole, the axial through hole comprises a large hole and a small hole, and a step surface is formed between the large hole and the small hole;
The supporting block is arranged in the large hole and is connected with the rotor body; the bottom surface of the supporting block is provided with a protruding part and an oil storage groove, the protruding part is abutted against the step surface, and the oil storage groove stores grease; the support block has a central through bore extending in an axial direction, the central through bore and the aperture being for passage of a rotor shaft.
2. The noise reducing rotor assembly of claim 1, wherein the boss comprises a plurality of radially extending ribs.
3. The noise reduction rotor assembly according to claim 2, wherein the number of ribs is four, the four ribs are uniformly distributed around the central through hole, and the oil storage groove is arranged between every two adjacent ribs.
4. The noise reducing rotor assembly of claim 1, wherein the outer peripheral surface of the support block is in interference fit with the bore wall of the large bore.
5. The noise reducing rotor assembly of claim 1, wherein the rotor body includes a larger outer diameter thick portion and a smaller outer diameter thin portion, the large aperture being disposed in the thick portion and the small aperture being disposed in the thin portion.
6. The noise reduction rotor assembly of claim 5, wherein the outer peripheral surface of the thick portion is provided with a plurality of permanent magnets at intervals in the circumferential direction.
7. The noise reducing rotor assembly of claim 1 or 5, wherein the walls of the large holes are provided with annular steps, the large holes being divided into fine holes and coarse holes with the annular steps as boundaries, the fine holes being adjacent to the small holes;
The support block is disposed in the fine hole.
8. The noise reduction rotor assembly of claim 1 or 5, wherein the rotor body and the support block are both plastic.
9. An actuator comprising a housing and a rotor shaft, the housing having an interior cavity, the actuator further comprising the noise reducing rotor assembly of any one of claims 1 to 8, the noise reducing rotor assembly and the rotor shaft disposed in the interior cavity;
The rotor shaft passes through the central through hole of the support block and the small hole of the rotor body, the two ends of the rotor shaft are respectively fixed at the top and the bottom of the shell, and the rotor shaft is in clearance fit with the central through hole of the support block and the small hole of the rotor body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322658395.1U CN220874338U (en) | 2023-09-28 | 2023-09-28 | Noise reduction rotor assembly and actuator thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322658395.1U CN220874338U (en) | 2023-09-28 | 2023-09-28 | Noise reduction rotor assembly and actuator thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220874338U true CN220874338U (en) | 2024-04-30 |
Family
ID=90814211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322658395.1U Active CN220874338U (en) | 2023-09-28 | 2023-09-28 | Noise reduction rotor assembly and actuator thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220874338U (en) |
-
2023
- 2023-09-28 CN CN202322658395.1U patent/CN220874338U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7466050B2 (en) | Brushless motor and method of manufacturing the same | |
| US7473034B2 (en) | Hydrodynamic bearing device, motor, and disk driving apparatus | |
| RU2667024C1 (en) | Inner-wheel assembly with engine | |
| EP2565376A2 (en) | Electric pump unit | |
| KR20040081466A (en) | Thrust sliding bearing | |
| US20030161558A1 (en) | Fluid bearing and brushless motor having the same | |
| JP2007263228A (en) | Dynamic pressure bearing device | |
| US20020047387A1 (en) | Spindle motor with toroidal sealing plates | |
| JP2002233100A (en) | Spindle motor and bearing assembly | |
| JP4232278B2 (en) | Hydrodynamic bearing and spindle motor equipped with the same | |
| KR101444554B1 (en) | Hydrodynamic bearing assembly and spindle motor having the same | |
| CN220874338U (en) | Noise reduction rotor assembly and actuator thereof | |
| KR20120043504A (en) | Fluid dynamic bearing assembly | |
| KR101141332B1 (en) | Fluid dynamic bearing assembly | |
| US3870383A (en) | Cassette-type bearing unit | |
| CN100389265C (en) | Heat elimination fan | |
| CN103026088A (en) | Tripod constant velocity joint | |
| CN101877510B (en) | Motor component used for anti-lock brake system | |
| US4326757A (en) | Bearing device for rotary machines | |
| JP6007084B2 (en) | Electric motor and fan motor | |
| CN212726712U (en) | Motor shaft | |
| JP3602325B2 (en) | Dynamic pressure type porous oil-impregnated bearing | |
| KR102622836B1 (en) | Wheel bearing for vehicle | |
| CN110848265A (en) | Rolling bearing and motor | |
| KR100832627B1 (en) | oilless bearing motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |