CN-122001114-A - Motor

Abstract

The invention discloses a motor which comprises a stator core, a fixing plate, a plurality of inserts and a plurality of welding parts, wherein the fixing plate is arranged on the back surface of the stator core along the axial direction of the motor and is attached to the back surface of the stator core, the fixing plate comprises a cooling channel and the inserts are arranged on one side, close to the back surface of the stator core, of the fixing plate, and each insert is arranged at intervals along the radial direction with the cooling channel and is welded with the back surface of the stator core to form a welding area. The invention can connect the stator core and the fixed plate in a welding fastening mode, and has the advantages of no screw assembly and fixation, simple structure and high assembly efficiency.

Inventors

• KANG YAJIE
• ZHANG HAO

Assignees

• 上海磁雷革传动系统有限公司

Dates

Publication Date

20260508

Application Date

20241105

Claims (10)

1. 1. An electric machine, comprising: a stator core; the fixing plate is arranged on the back surface of the stator core along the axial direction and is attached to the back surface of the stator core; The fixing plate comprises a cooling channel and a plurality of inserts, the inserts are arranged on one side of the fixing plate, which is close to the back surface of the stator core, wherein, Each of the inserts is disposed radially spaced from the cooling passage and welded to the back surface of the stator core to form a weld zone.
2. 2. The electric machine of claim 1, wherein the stator core comprises silicon steel sheets and the insert is made of a material comprising low carbon steel.
3. 3. The motor of claim 1 or 2, wherein the fixing plate further comprises a plurality of fixing holes, the plurality of inserts being correspondingly disposed in the plurality of fixing holes and connected to the corresponding fixing holes, wherein, Each of the fixing holes penetrates through the fixing plate along the axial direction.
4. 4. A motor as set forth in claim 3 wherein each of said inserts has a slot extending in said axial direction; Along the axial direction, one end of the slot is communicated with the corresponding fixing hole, the other end of the slot forms a welding part, and the welding part is welded with the back surface of the stator core to form the welding area.
5. 5. The motor of claim 4, wherein the welded portion is welded to the back surface of the stator core by laser penetration welding.
6. 6. The electric machine of any one of claims 1, 2, 4, 5, wherein the penetration of the weld zone in the axial direction comprises 0.5mm to 1mm.
7. 7. A motor according to claim 3, wherein a wall of each of the fixing holes is provided with a recess extending in a circumferential direction of the wall; each insert has a convex portion corresponding to the concave portion, the convex portion extends in the circumferential direction of the insert and is accommodated in the concave portion, and one end of each insert abuts against an upper wall of the concave portion in the axial direction.
8. 8. The electric machine of any one of claims 1,2,4, 5, 7, wherein each of the inserts is die cast with the stationary plate.
9. 9. The electric machine of any one of claims 1, 2, 4, 5, 7, wherein the back face of the stator core comprises a planar face.
10. 10. The electric machine of any one of claims 4, 5, 7, wherein each of the welds has the same diameter and the thickness of each of the welds is the same.

Description

Motor Technical Field The invention relates to the technical field of motors, in particular to a motor. Background The stator core of the existing motor (such as the new energy axial permanent magnet disc type motor) needs to be fixed on the shell (or the end cover). At present, a fixing mode is commonly adopted, namely, a fastening screw hole and an internal threaded hole are respectively formed on a stator core and a shell, for example, the fastening screw hole is formed on the shell, the internal threaded hole is formed on the stator core, the iron core is fixed from outside to inside by using a fastening screw, or the threaded hole is formed on the shell, the fastening screw hole is formed on the stator core, and the iron core is fixed from inside to outside by using the fastening screw. However, in order to meet the connection strength, a large number of screws are often required, so that the cooling circuit of the housing needs to avoid the screw holes, which results in complex cooling circuit structure, low cooling efficiency and difficult assembly. In addition, the plurality of threaded holes formed in the stator core also affect the integrity of the magnetic field of the stator core, reducing the efficiency of the motor. Disclosure of Invention The invention aims to solve the technical problems of low cooling efficiency and difficult assembly caused by screw fixation of a stator core in the existing motor. The invention provides a motor, which can be used for connecting a stator core and a fixed plate in a welding and fastening mode, is assembled and fixed without screws, and has a simple structure and high assembly efficiency. In order to solve the technical problems, the embodiment of the invention discloses a motor which comprises a stator core, a fixing plate, a plurality of inserts and a plurality of welding parts, wherein the fixing plate is arranged on the back surface of the stator core along the axial direction of the motor and is attached to the back surface of the stator core, the fixing plate comprises a cooling channel and the inserts are arranged on one side, close to the back surface of the stator core, of the fixing plate, and each insert is arranged at intervals along the radial direction with the cooling channel and is welded with the back surface of the stator core so as to form a welding area. By adopting the technical scheme, the stator core is connected with the insert arranged on the fixed plate by welding, so that the stator core and the fixed plate are connected, the stator core and the fixed plate do not need to be assembled again, the stator core does not need to be provided with bolt holes, the back surface of the stator core is clean and tidy, machining of the stator core is avoided, and meanwhile the integral strength of the stator core is also increased. Therefore, compared with the existing method adopting screw fastening, on one hand, the stator core provided by the embodiment of the application can be tightly attached to the fixed plate, and the failure risk and the connection strength of the welded connection between the fixed plate and the stator core are low. And the back of the stator core is smooth without a threaded hole, so that the integrity of a magnetic field of the stator core is ensured, a magnetic circuit is more saturated, and the efficiency of the motor is improved. On the other hand, the inserts arranged on the fixing plate of the embodiment of the application are flexibly distributed relative to the positions of the stator iron cores, the positions of welding points formed by the stator iron cores and the inserts are more free, the position is not limited by bolt holes in the stator iron cores, the cooling channels arranged on the fixing plate can be avoided, the layout of the cooling structure in the fixing plate of the motor of the embodiment of the application is convenient, and the cooling effect is good. According to another embodiment of the invention, the stator core comprises silicon steel sheets, and the insert is made of low-carbon steel. By adopting the technical scheme, the silicon steel sheet and the low-carbon steel belong to steel materials and have the same melting point, so that the stator core and the insert are easier to be connected together through welding, and the welding strength (such as tensile strength) between the stator core and the insert can be ensured. According to another specific embodiment of the invention, the embodiment of the invention discloses a motor, the fixing plate further comprises a plurality of fixing holes, the inserts are correspondingly arranged in the fixing holes and are connected with the corresponding fixing holes, and each fixing hole penetrates through the fixing plate along the axial direction. According to another embodiment of the invention, the motor is disclosed, wherein each insert is provided with a slot extending along the axial direction, one end of the slot is communicated with the co