CN219960293U - Motor rotor assembly and motor with same - Google Patents
Motor rotor assembly and motor with same Download PDFInfo
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- CN219960293U CN219960293U CN202320288763.5U CN202320288763U CN219960293U CN 219960293 U CN219960293 U CN 219960293U CN 202320288763 U CN202320288763 U CN 202320288763U CN 219960293 U CN219960293 U CN 219960293U
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- bearing
- motor
- motor shaft
- rotor assembly
- assembly according
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- 238000009434 installation Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003292 glue Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model relates to a motor rotor assembly and a motor with the same, the motor rotor assembly comprises a front bearing, a rear bearing, a motor shaft, a rotor core, magnetic steel, a front shaft sleeve and a rear shaft sleeve, wherein the rear bearing, the rear shaft sleeve, the motor shaft, the front shaft sleeve and the front bearing sequentially penetrate into the motor shaft, the magnetic steel is arranged on the rotor core, a first bearing installation position and a second bearing installation position are arranged on the motor shaft, a first protruding part for fixing the motor shaft and the front bearing in a matching manner is arranged on the first bearing installation position, and a second protruding part for fixing the motor shaft and the rear bearing in a matching manner is arranged on the second bearing installation position. Compared with the prior art, the utility model has the advantages of reducing the process cost, reducing the difficulty of process production, improving the reliability of products and the like.
Description
Technical Field
The present utility model relates to an electric machine, and more particularly, to an electric machine rotor assembly and an electric machine having the same.
Background
In the motor industry, the inner ring of the bearing in the motor is matched with the rotating shaft to rotate, the outer ring is matched with the end cover to be static, and the outer ring is mostly loaded in a constant direction like a synchronous belt, so that the basic inner ring in the motor industry is in interference fit, and the outer ring is mostly in clearance fit.
Currently, in order to improve assembly efficiency and reduce assembly difficulty in engineering, the inner ring of the bearing is usually matched by loose matching and dispensing of the inner ring, as shown in fig. 1.
When the bearing is installed, the front bearing 1 is installed to the first bearing installation position 8, and the rear bearing 2 is installed to the second bearing installation position 9; before the bearing is installed, glue is coated on the first bearing installation position 8 and the second bearing installation position 9, and then the bearing is installed.
The loose dispensing process can present the following risks:
1. glue overflows to cause glue to invade the inside of the bearing to cause the bearing to lose efficacy;
2. the control of the glue is a relatively large pain point, and the inner ring and the rotating shaft do not have interference effect due to insufficient glue coating or insufficient curing time;
3. the motor runs for a period of time, and the glue may volatilize and lose the fixing effect, etc.
Disclosure of Invention
The present utility model is directed to a rotor assembly for an electric motor and an electric motor having the same, which overcome the above-mentioned drawbacks of the prior art.
The aim of the utility model can be achieved by the following technical scheme:
according to one aspect of the utility model, there is provided a motor rotor assembly comprising a front bearing, a rear bearing, a motor shaft, a rotor core, magnetic steel, a front sleeve and a rear sleeve, wherein the rear bearing, the rear sleeve, the motor shaft, the front sleeve and the front bearing penetrate into the motor shaft in sequence, the magnetic steel is mounted on the rotor core, a first bearing mounting position and a second bearing mounting position are arranged on the motor shaft, a first protruding part for fixing the motor shaft and the front bearing in a matching manner is arranged on the first bearing mounting position, and a second protruding part for fixing the motor shaft and the rear bearing in a matching manner is arranged on the second bearing mounting position.
As a preferable technical scheme, the first protruding portion is higher than the surface of the motor shaft.
As a preferable technical scheme, the second protruding portion is higher than the surface of the motor shaft.
As a preferable technical scheme, the height of the first protruding part is 0-0.05 mm higher than the surface of the motor shaft.
As a preferable technical scheme, the height of the second protruding part is 0-0.05 mm higher than the surface of the motor shaft.
As a preferable technical scheme, the motor shaft is fixed with the front bearing in an interference fit manner through the first protruding part.
As a preferable technical scheme, the motor shaft is fixed with the rear bearing in an interference fit manner through the second protruding part.
Preferably, the first protrusion is a strip, a dot or any other shape.
Preferably, the second protrusion is a strip, a dot or any other shape.
According to another aspect of the present utility model there is provided an electrical machine having a rotor assembly comprising a motor stator assembly, the electrical machine further comprising the electrical machine rotor assembly.
Compared with the prior art, the utility model has the following advantages:
1) According to the utility model, the interference fit between the bearing and the shaft is realized by arranging the protruding part on the bearing block, so that the performance of the product is improved;
2) Compared with the prior art, the novel process reduces the process cost; glue is not used, the difficulty of process production is reduced, and the reliability of the product is improved.
Drawings
FIG. 1 is a schematic structural view of a conventional rotor assembly;
FIG. 2 is a schematic view of a rotor assembly according to the present utility model;
wherein 1 is a front bearing, 2 is a rear bearing, 3 is a motor shaft, 4 is a rotor core, 6 is magnetic steel, 6 is a front shaft sleeve, 7 is a rear shaft sleeve, 8 is a first bearing mounting position, and 9 is a second bearing mounting position;
10 is a first boss and 11 is a second boss.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
Example 1
As shown in fig. 2, the motor rotor assembly comprises a front bearing 1, a rear bearing 2, a motor shaft 3, a rotor iron core 4, magnetic steel 5, a front shaft sleeve 6 and a rear shaft sleeve 7, wherein the rear bearing 2, the rear shaft sleeve 7, the motor shaft 3, the front shaft sleeve 6 and the front bearing 1 sequentially penetrate into the motor shaft 3, the magnetic steel 5 is arranged on the rotor iron core 4, a first bearing installation position 8 and a second bearing installation position 9 are arranged on the motor shaft 3, a first protruding part 10 for being matched with and fixing the motor shaft 3 and the front bearing 1 is arranged on the first bearing installation position 8, and a second protruding part 11 for being matched and fixing the motor shaft 3 and the rear bearing 2 is arranged on the second bearing installation position 9.
The first protruding part 10 is higher than the surface of the motor shaft 3, and the second protruding part 11 is higher than the surface of the motor shaft 3. Preferably, the height of the first protrusion 10 is 0-0.05 mm higher than the surface of the motor shaft 3, and the height of the second protrusion 11 is 0-0.05 mm higher than the surface of the motor shaft 3. More preferably, the first and second protrusions 10 and 11 have a protrusion height of 0.03mm, thereby securing connection stability.
The motor shaft 3 is fixed with the front bearing 1 through the first protruding part 10 in an interference fit manner, the motor shaft 3 is fixed with the rear bearing 2 through the second protruding part 11 in an interference fit manner, and the motor shaft and the inner ring of the bearing are fixed through the interference fit manner, so that the motor shaft and the inner ring of the bearing rotate together, and the performance of the motor is further improved.
The first protruding part 10 is in any shape of a strip, a dot or others, and the second protruding part 11 is in any shape of a strip, a dot or others, wherein the shapes of the first protruding part 10 and the second protruding part 11 may be the same or different.
According to the utility model, the interference fit between the bearing and the shaft is realized by arranging the protruding part on the bearing block. Compared with the old process, the new process reduces the process cost; glue is not used, the difficulty of process production is reduced, and the reliability of the product is improved.
Example 2
The present utility model also provides an electric machine comprising a motor stator assembly and the motor rotor assembly of embodiment 1.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a motor rotor subassembly, includes preceding bearing (1), back bearing (2), motor shaft (3), rotor core (4), magnet steel (5), preceding axle sleeve (6) and back axle sleeve (7), back bearing (2), back axle sleeve (7), motor shaft (3), preceding axle sleeve (6) and preceding bearing (1) penetrate in proper order on motor shaft (3), magnet steel (5) are installed on rotor core (4), be equipped with first bearing installation position (8) and second bearing installation position (9) on motor shaft (3), a serial communication port, be equipped with on first bearing installation position (8) and be used for the cooperation fixed motor shaft (3) and first bellying (10) of preceding bearing (1), be equipped with on second bearing installation position (9) and be used for the cooperation fixed motor shaft (3) and second bellying (11) of back bearing (2).
2. A motor rotor assembly according to claim 1, wherein the first protrusion (10) is higher than the surface of the motor shaft (3).
3. A motor rotor assembly according to claim 1, characterized in that the second protrusions (11) are higher than the surface of the motor shaft (3).
4. A motor rotor assembly according to claim 1, characterized in that the first projection (10) has a projection height of 0-0.05 mm above the surface of the motor shaft (3).
5. A motor rotor assembly according to claim 1, characterized in that the second protrusions (11) have a protrusion height of 0-0.05 mm above the surface of the motor shaft (3).
6. A motor rotor assembly according to claim 1, wherein the motor shaft (3) is secured to the front bearing (1) by an interference fit of the first boss (10).
7. A motor rotor assembly according to claim 1, wherein the motor shaft (3) is secured to the rear bearing (2) by an interference fit of the second boss (11).
8. An electric motor rotor assembly according to claim 1, characterized in that the first protrusion (10) is an elongated strip, a dot or any other shape.
9. An electric motor rotor assembly according to claim 1, characterized in that the second protrusions (11) are elongated, dots or any other shape.
10. An electric machine comprising a motor stator assembly, characterized in that the electric machine further comprises a motor rotor assembly according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320288763.5U CN219960293U (en) | 2023-02-22 | 2023-02-22 | Motor rotor assembly and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320288763.5U CN219960293U (en) | 2023-02-22 | 2023-02-22 | Motor rotor assembly and motor with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219960293U true CN219960293U (en) | 2023-11-03 |
Family
ID=88556033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320288763.5U Active CN219960293U (en) | 2023-02-22 | 2023-02-22 | Motor rotor assembly and motor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219960293U (en) |
-
2023
- 2023-02-22 CN CN202320288763.5U patent/CN219960293U/en active Active
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