CN218183086U

CN218183086U - Motor and motor component

Info

Publication number: CN218183086U
Application number: CN202221413994.6U
Authority: CN
Inventors: 万正茂
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-12-30
Anticipated expiration: 2032-06-08

Abstract

The application provides a motor and a motor component. The motor includes a stator and a rotor. The motor component constitutes one of both the stator and the rotor. The core comprises a plurality of laminations which are mutually overlapped and fixed together along the axial direction, the core comprises two end faces which are opposite in the axial direction, a fixing hole is arranged by penetrating through at least one end face, the fixing hole penetrates through at least two laminations and comprises a first area and a second area, the first area is communicated with the second area to the end faces, and the second area is partially not overlapped with the first area in the axial direction. The motor component has stable structure and proper cost. The motor quality is reliable.

Description

Motor and motor component

Technical Field

The present application relates to electrical machines, and more particularly, to an electrical machine including a laminated core and an insulation cover mounted to the core.

Background

The stator of the motor includes a core formed by stacking steel sheets and an insulating mask. In the manufacturing process of the motor, the winding is usually formed on the core by assembling the mask on the end of the core before winding and then winding the wire on the mask. The shield separates the winding from the core, preventing the winding from directly contacting the core. However, in the actual manufacturing process, the mask may fall off from the core, which affects the manufacturing efficiency and product quality.

SUMMERY OF THE UTILITY MODEL

The technical problem that the insulating cover drops from the core exists among the prior art is mainly solved to this application.

To solve the above technical problem, in one aspect, the present application provides a motor part including:

the core comprises a plurality of laminations which are mutually overlapped and fixed together along the axial direction, the core comprises two end faces which are opposite in the axial direction, a fixing hole is arranged through at least one end face and penetrates through at least two laminations, the fixing hole comprises a first area and a second area, the first area is communicated with the second area to the end face, and part of the second area is not overlapped with the first area in the axial direction.

In some embodiments, the plurality of laminations include a first lamination and a second lamination, the first region is disposed in the first lamination, the second region is disposed in the second lamination, the first region extends through the first lamination in the axial direction, the second region extends through the second lamination in the axial direction, the second region is larger than the first region, and the end face is located on a side of the first lamination.

In some embodiments, the plurality of laminations includes a third lamination, wherein the second lamination is positioned between the first lamination and the third lamination, and the third lamination is not provided with a through hole at a position coinciding with the second region in the axial direction.

In some embodiments, the motor component includes an insulating cover, the insulating cover includes a tray body and fixing columns, the tray body covers the end surface, the fixing columns include column portions and stop portions, each fixing column is located in one fixing hole, the column portions are located in the first area, and the stop portions are located in the second area and are prevented by the first lamination from moving in the direction of the tray body.

In some embodiments, the insulation cover is integrally injection-molded on the core body by plastic, and the fixing posts are insert-molded in the fixing holes.

In some embodiments, the first lamination is provided with circular or elongated through holes at the first region position, the number of the first lamination is more than one, the second lamination is provided with elongated through holes at the second region position, the number of the second lamination is more than two, and the number of the third lamination is more than three.

In some embodiments, the core includes a base and a plurality of pole shoes, each pole shoe protrudes from the base in a radial direction, a plurality of fixing holes are formed in the base, each fixing hole is disposed adjacent to the pole shoe, each lamination is fixed to an adjacent lamination by a rivet formed by partially deflecting the base, the rivet includes a protrusion on one surface of the lamination and a recess on an opposite surface of the lamination, and the protrusion of one lamination is inserted into the recess of the adjacent lamination to be riveted.

In some embodiments, the electric machine component includes a winding formed by an enameled wire around the pole shoes, the insulation cover is spaced between the winding and the core, the base body has a hollow cylindrical shape, and the pole shoes respectively protrude from the inside of the base body toward the center.

In another aspect, the present application provides an electric machine comprising a stator and a rotor rotatably mounted relative to the stator, one of the stator and rotor being formed in accordance with the aforementioned machine components.

In some embodiments, a plurality of magnets are mounted in the other of the two, the magnets being permanent magnets, the current of the windings interacting with the magnetic field of the magnets to drive the rotor to rotate relative to the stator when the windings are energized.

According to the technical scheme of the application, the fixing hole in the core body does not straightly penetrate in the axial direction, and a part of the second area of the fixing hole does not overlap with the first area in the axial direction. In particular, in the embodiment in which the motor component includes the insulating cover, the fixing post of the insulating cover is located in the fixing hole, the post portion of the fixing post is located in the first area, and the stopping portion of the fixing post is located in the second area and is prevented from moving in the disk body direction by the first lamination. Therefore, the insulating cover can be fixed to the core without additional parts. The motor component has stable structure and proper cost. The manufacturing of the motor with reliable quality is facilitated.

Drawings

Specific embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein:

fig. 1 shows a schematic view of an electric machine of an embodiment, in which a housing and the like are omitted for convenience of explanation, as viewed in an axial direction of the electric machine;

FIG. 2 shows a schematic view of a core of an embodiment of a motor component;

FIG. 3 showsbase:Sub>A schematic partial cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 shows a schematic view of a first lamination of an embodiment;

FIG. 5 shows a schematic view of a second lamination of an embodiment;

FIG. 6 shows a schematic view of a third lamination of an embodiment; and

figure 7 shows a schematic view in partial section of one embodiment of the motor assembly in the same position as shown in figure 3.

Detailed Description

Referring to fig. 1 to 7, in some embodiments, the motor includes a stator 5 and a rotor 6. The rotor 6 is rotatably mounted relative to the stator 5. Those skilled in the art will appreciate that the stator and rotor are opposed. One of the holders is then the stator and the other is the rotor. For example, as shown in fig. 1, the stator 5 is a cylindrical member located at the outer ring, and the rotor 6 is a member located inside the stator 5, which is a motor in the form of an inner rotor outer stator. In other embodiments, the inner component may be fixed to become the stator and the outer ring to become the rotor. For example, many electric vehicles are driven by an electric motor in the form of an outer rotor and an inner stator. The following description will be given by taking an inner rotor and an outer stator as examples.

The motor components as the stator 5 include a core 1, an insulating cover 3, and a winding 4. The core body 1 includes a base body 16 and a plurality of pole shoes 18. Each pole shoe 18 projects radially from the base body 16. In the embodiment shown in the figures, the base body 16 has a hollow cylindrical shape, and 12 pole shoes 18 protrude from the inside of the base body 16 toward the center, respectively. The winding 4 is formed by enameled wires around the pole shoes 18. The insulating cover 3 is spaced between the winding 4 and the core 1. The insulating cover 3 prevents the winding 4 from directly contacting the core 1, and prevents the winding 4 from being damaged by the core 1. A plurality of magnets 7 are mounted in the rotor 6. In the embodiment shown in the figure, 8 magnets 7 are mounted in the rotor 6. The magnet 7 is a permanent magnet. When the windings 4 are energized, the current in the windings 4 interacts with the magnetic field of the magnets 7 to drive the rotor 6 to rotate relative to the stator 5.

The core 1 comprises a plurality of laminations 2 fixed to one another in axial superposition. The core 1 includes two end faces 10 opposed in the axial direction, and a fixing hole 12 is provided through at least one of the end faces 10. For example, a plurality of fixing holes 12 are provided in both end surfaces 10 of the core body 1. A plurality of fixing holes 12 are provided in the base body 16, and each fixing hole 12 is provided at a position close to the pole piece 18. As shown, two fixing holes 12 are provided near the root of each pole piece 18. A rivet 24 is provided between the two fixing holes 12. The fastening holes 12 extend through at least two laminations 2. The fixing hole 12 includes a first region 121 and a second region 122, and the first region 121 communicates the second region 122 to the end face 10. The second region 122 does not overlap with the first region 121 in the axial direction. That is, in the axial direction, a part of the second region 122 overlaps the first region 121, while a part of the second region 122 does not overlap the first region 121, or a part of the second region 122 is not covered by the first region 121. As shown in fig. 3, the vertical direction is the axial direction of the motor, the middle portion of the second region 122 overlaps the first region 121 in the axial direction, the left and right side portions of the second region 122 do not overlap the first region 121 in the axial direction, and the second region 122 is larger than the first region 121.

In some embodiments, the plurality of laminations 2 includes three laminations, a first lamination 21 (shown in fig. 4), a second lamination 22 (shown in fig. 5), and a third lamination 23 (shown in fig. 6). The end face 10 is located at the side of the first lamination 21. The number of first laminations 21 is greater than one, for example the number of first laminations 21 is 4. The number of second laminations 22 is greater than two, for example, the number of second laminations 22 is 4. The number of third laminations 23 is greater than three, for example the number of third laminations 23 is 30 or 40. During manufacturing, three laminated sheets are formed by punching respectively and then are sequentially stacked along the axial direction. Each lamination 2 is fixed to the adjacent lamination 2 by means of rivets 24. The caulking portion 24 is formed by partially deflecting the base 16. For example, rivets 24 are provided near the root of each pole piece 18. The rivet 24 comprises a projection on one face of the lamination 2 and a recess on the opposite face of the lamination 2. As shown in fig. 3 and 7, the rivet 24 protrudes upward from the upper surface of each lamination 2, and the rivet 24 is recessed upward from the lower surface of each lamination 2. The projection of one lamination 2 is inserted into the recess of the adjacent lamination 2 to be riveted. The second lamination 22 is located between the first lamination 21 and the third lamination 23. The first region 121 is arranged in the first lamination 21 axially through the first lamination 21. For example, the first lamination 21 is provided with a circular or elongated through hole at the position of the first region 121. The second region 122 is disposed in the second lamination 22 axially through the second lamination 22. For example, the second lamination 22 is provided with elongated through holes at the location of the second region 122. The elongated through holes of the first region 121 and the second region 122 extend substantially circumferentially, that is to say the long axis direction of these elongated through holes is substantially perpendicular to the radius passing through the center thereof. The length of the elongated through-hole of the second region 122 is greater than the length of the through-hole of the first region 121. The third lamination 23 is not provided with through holes at positions axially coinciding with the second regions 122.

The insulating cover 3 is integrally formed on the core body 1 by plastic through injection molding. The insulating cover 3 includes a tray 30 and a fixing post 32. The disks 30 cover the end face 10 of the core 1. As shown, disc 30 covers not only pole piece 18 of core 1, but also disc 30 covers base 16 of core 1. The fixing post 32 is insert-molded in the fixing hole 12. The fixing post 32 includes a post portion 320 and a stop portion 322. Each fixing post 32 is located in one of the fixing holes 12, the post portion 320 is located in the first region 121, and the stopper portion 322 is located in the second region 122 and is prevented from moving toward the disk body 30 by the first lamination 21. Therefore, the insulating cover 3 can be fixed to the core 1 without requiring an additional component. The motor component has stable structure and proper cost. The manufacturing of a motor with reliable quality is facilitated.

Notwithstanding the foregoing, the scope of protection of the present application is defined by the claims.

Claims

1. A motor component, characterized in that it comprises:

a core (1) including a plurality of laminations (2) fixed to each other in an axial direction, the core (1) including two end faces (10) opposed in the axial direction, a fixing hole (12) being provided through at least one of the end faces (10), the fixing hole (12) penetrating at least two of the laminations (2), the fixing hole (12) including a first region (121) and a second region (122), the first region (121) communicating the second region (122) to the end faces (10), and a portion of the second region (122) in the axial direction not overlapping the first region (121).

2. The electric machine component according to claim 1, wherein the plurality of laminations (2) comprises a first lamination (21) and a second lamination (22), the first region (121) being arranged in the first lamination (21), the second region (122) being arranged in the second lamination (22), the first region (121) extending through the first lamination (21) in the axial direction, the second region (122) extending through the second lamination (22) in the axial direction, the second region (122) being larger than the first region (121), the end face (10) being located laterally to the first lamination (21).

3. The electric machine component according to claim 2, wherein the plurality of laminations (2) comprises a third lamination (23), wherein the second lamination (22) is located between the first lamination (21) and the third lamination (23), and wherein the third lamination (23) is free of through holes at positions coinciding with the second region (122) in the axial direction.

4. The electric machine component according to claim 2, wherein the electric machine component comprises an insulating cover (3), the insulating cover (3) comprises a disc body (30) and fixing posts (32), the disc body (30) covers the end surface (10), the fixing posts (32) comprise post portions (320) and stop portions (322), each fixing post (32) is located in one of the fixing holes (12), the post portions (320) are located in the first area (121), and the stop portions (322) are located in the second area (122) and are prevented from moving in the direction of the disc body (30) by the first lamination (21).

5. The electric machine component according to claim 4, wherein the insulating cover (3) is integrally injection molded from plastic on the core body (1), and the fixing posts (32) are insert molded in the fixing holes (12).

6. The electric machine component according to claim 3, wherein the first laminations (21) are provided with circular or elongated through holes at the location of the first region (121), the number of first laminations (21) being greater than one, the second laminations (22) being provided with elongated through holes at the location of the second region (122), the number of second laminations (22) being greater than two, and the number of third laminations (23) being greater than three.

7. An electric machine component according to claim 4, wherein the core (1) comprises a base (16) and a plurality of pole shoes (18), each pole shoe (18) protrudes radially from the base (16), a plurality of fixing holes (12) are provided in the base (16), each fixing hole (12) is provided in a position close to the pole shoe (18), each lamination (2) is fixed to an adjacent lamination (2) by a rivet (24), the rivet (24) is formed by partially deflecting the base (16), the rivet (24) comprises a projection on one face of the lamination (2) and a recess on the opposite face of the lamination (2), and the projection of one lamination (2) is inserted into the recess of the adjacent lamination (2) to be riveted.

8. The electric machine component according to claim 7, wherein the electric machine component comprises a winding (4), the winding (4) being formed by enameled wire around the pole shoes (18), the insulating cover (3) being spaced between the winding (4) and the core (1), the base body (16) being hollow cylindrical, the pole shoes (18) protruding centrally from inside the base body (16), respectively.

9. Electric machine comprising a stator (5) and a rotor (6), the rotor (6) being rotatably mounted with respect to the stator (5), characterized in that the machine part according to any of claims 1 to 8 constitutes one of both the stator (5) and the rotor (6).

10. An electric machine as claimed in claim 9, wherein a plurality of magnets (7) are mounted in the other of said two, said magnets (7) being permanent magnets, the current of said winding (4) interacting with the magnetic field of said magnets (7) to drive said rotor (6) in rotation with respect to said stator (5) when said winding (4) is energized.