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CN-224233431-U - Motor and electric tool

CN224233431UCN 224233431 UCN224233431 UCN 224233431UCN-224233431-U

Abstract

The application discloses a motor and an electric tool. The motor comprises a motor shaft, a rotor assembly sleeved on the motor shaft, a stator assembly arranged around the motor shaft, a stator assembly comprising a stator core, a stator end plate connected with the stator core, and a plurality of groups of coils wound on the stator end plate, wherein one side of the stator end plate, which is far away from the stator core, is provided with a plurality of wiring structures along the circumferential direction of the motor shaft, each wiring structure comprises a first connecting part and a second connecting part which are arranged at opposite intervals, a jumper wire is connected with different groups of coils through the first connecting parts, and a lead wire is connected with the coils and led out of the stator assembly through the second connecting parts. The wiring structure is circumferentially distributed, so that the axial space is saved, the wiring structure is suitable for a compact electric tool motor cabin, and the assembled structure is high in stability due to the relatively built-in wiring structure.

Inventors

  • ZHANG LEI
  • SUN YULONG

Assignees

  • 江苏东成工具科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. An electric machine, comprising: A motor shaft; the rotor assembly is sleeved on the motor shaft; The stator assembly is arranged around the motor shaft and comprises a stator core, a stator end plate connected with the stator core and a plurality of groups of coils wound on the stator end plate, one side of the stator end plate, which is far away from the stator core, is provided with a plurality of wiring structures along the circumferential direction of the motor shaft, and each wiring structure comprises a first connecting part and a second connecting part which are arranged at opposite intervals; The jumper wire is connected with different groups of coils through the first connecting part; And the outgoing line is connected with the coil and is led out of the stator assembly through the second connecting part.
  2. 2. The electric machine of claim 1, wherein: The motor is a three-phase brushless motor, and the stator assembly comprises three groups of coils and three wiring structures.
  3. 3. The electric machine of claim 2, wherein: Adjacent ones of the wiring structures are circumferentially spaced 120 ° apart from each other at the stator end plates.
  4. 4. The electric machine of claim 2, wherein: the wiring structures are distributed in the same half circumference in the circumferential direction of the stator end plate.
  5. 5. The electric machine of claim 1, wherein: the wiring structure further comprises a main body, wherein the first connecting part and the second connecting part respectively comprise a first bottom and a second bottom which are connected with the main body, and the first bottom and the second bottom are in a bending shape.
  6. 6. The electric machine of claim 5, wherein: The first connection portion further includes a first header opposite the first bottom portion, and the second connection portion further includes a second header opposite the second bottom portion, the first header being higher than the second header.
  7. 7. The electric machine of claim 5, wherein: The first bottom portion is bent at a greater angle than the second bottom portion.
  8. 8. The electric machine of claim 5, wherein: barbs are arranged on two sides of the main body, and the wiring structure is fixed on the stator end plate through the barbs; the outer peripheral surface of the stator end plate is provided with a wire clamping groove, and the outgoing wires are led out of the stator assembly through the second connecting part and the wire clamping groove in sequence.
  9. 9. The electric machine of claim 1, wherein: the jumper wire is welded and fixed with the first connecting portion, and the outgoing line is welded and fixed with the second connecting portion.
  10. 10. A power tool comprising the motor of any one of claims 1 to 9.

Description

Motor and electric tool Technical Field The embodiment of the application relates to the technical field of tools, in particular to a motor and an electric tool. Background There are mainly two types of connection modes of stator coils of a brushless motor for an electric tool. The first mode is that no wiring terminal exists, and the enameled wire is directly connected with the outgoing line. The second way is to use a connection terminal through which the stator coil and the outgoing line are conducted. The terminal is fixed on the end plate at one side of the stator core in axial direction, and the lead wire is welded on the terminal welding part. However, the existing terminal welding parts are mostly suspended outside, and for some tools with larger vibration, the arrangement is easy to influence the structural stability. Therefore, the stator coil wiring of the traditional brushless motor mostly adopts a distributed welding or external wiring board, and the problems of low space utilization rate, complex assembly process, easiness in being influenced by mechanical vibration and the like exist. Disclosure of utility model Aiming at the defects of the prior art, the application provides a motor and an electric tool, which can be beneficial to improving the space utilization and stability of a wiring structure. The application provides a motor, comprising: A motor shaft; the rotor assembly is sleeved on the motor shaft; The stator assembly is arranged around the motor shaft and comprises a stator core, a stator end plate connected with the stator core and a plurality of groups of coils wound on the stator end plate, one side of the stator end plate, which is far away from the stator core, is provided with a plurality of wiring structures along the circumferential direction of the motor shaft, and each wiring structure comprises a first connecting part and a second connecting part which are arranged at opposite intervals; The jumper wire is connected with different groups of coils through the first connecting part; And the outgoing line is connected with the coil and is led out of the stator assembly through the second connecting part. The motor is a three-phase brushless motor, and the stator assembly comprises three groups of coils and three wiring structures. The further improvement is that adjacent wiring structures are circumferentially spaced from each other by 120 degrees and distributed on the stator end plate. The further improvement scheme is that the wiring structures are distributed in the same half circumference of the stator end plate in the circumferential direction. The wiring structure further comprises a main body, wherein the first connecting part and the second connecting part respectively comprise a first bottom and a second bottom which are connected with the main body, and the first bottom and the second bottom are in a bending shape. The further improvement is that the first connecting part further comprises a first head part opposite to the first bottom part, the second connecting part further comprises a second head part opposite to the second bottom part, and the first head part is higher than the second head part. The further improvement scheme is that the bending angle of the first bottom is larger than that of the second bottom. The two sides of the main body are provided with barbs, and the wiring structure is fixed on the stator end plate through the barbs; the outer peripheral surface of the stator end plate is provided with a wire clamping groove, and the outgoing wires are led out of the stator assembly through the second connecting part and the wire clamping groove in sequence. The further improvement scheme is that the jumper wire is welded and fixed with the first connecting part, and the outgoing wire is welded and fixed with the second connecting part. The application provides an electric tool, which comprises the motor. The motor and the electric tool provided by the embodiment of the application have the advantages that the axial space is saved due to the circumferential layout of the wiring structure, the motor and the electric tool are suitable for a motor cabin of a compact electric tool, the stability of the assembled structure is high due to the relatively built-in wiring structure, the assembling and distributing procedures of the coil are reduced due to the centralized wiring of the jumper wire and the outgoing wire in the wiring structure, and the physical isolation of the jumper wire and the outgoing wire is realized due to the design of the split type connecting part, so that the short circuit risk caused by the interference of the cable is avoided. Drawings One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated. FIG. 1 is a persp