CN-224233437-U - Magnetic ring positioning and fixing structure and hub motor

CN224233437UCN 224233437 UCN224233437 UCN 224233437UCN-224233437-U

Abstract

The utility model relates to the technical field of motors, in particular to a magnetic ring positioning and fixing structure and a hub motor, wherein the hub motor comprises a base, a rotating shaft, a stator assembly, a rotor assembly, an end cover and a tire, the base is provided with a rotating connecting cavity, one end of the rotating shaft is arranged on the rotating connecting cavity, the other end of the rotating shaft is fixedly connected with the rotating connecting part, the stator assembly is arranged on the base, the rotor assembly is arranged on the shell and opposite to the stator assembly, and the outer diameter of the end cover is connected with the shell and the inner diameter of the end cover is rotationally connected with the base. The magnetic ring positioning and fixing structure comprises a shell and a magnetic ring, wherein a rotary connecting part is arranged at the axis of the shell, a plurality of positioning convex blocks are uniformly distributed on the shell in the circumferential direction by taking the rotary connecting part as the center, positioning grooves are formed between the plurality of positioning convex blocks and the rotary connecting part, and the magnetic ring is arranged on the positioning grooves. The utility model simplifies the installation process of the magnetic ring, reduces the assembly difficulty and obviously improves the overall performance of the hub motor.

Inventors

YU YANAN
CHEN CHUNYIN
TANG SHENG
Zhou Sicen
LU ZHENFENG

Assignees

本末动力(北京)科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250307

Claims (10)

1. The magnetic ring positioning and fixing structure is characterized by comprising a shell and a magnetic ring, wherein a plurality of positioning convex blocks which are annularly and uniformly distributed with the axis of the shell as the center are arranged on the shell, the magnetic ring is arranged on the shell, and the magnetic ring is positioned by each positioning convex block so that the axis of the magnetic ring is coaxial with the axis of the shell.
2. The magnetic ring positioning and fixing structure as set forth in claim 1, wherein each of the positioning projections forms a positioning surface on a side of the housing facing the axis, and each of the positioning surfaces positions the magnetic ring.
3. The magnetic ring positioning and fixing structure as set forth in claim 2, wherein the positioning surface is an arc-shaped structure with a radius of curvature consistent with that of the magnetic ring.
4. The magnetic ring positioning and fixing structure as set forth in claim 1, wherein the positioning projection is formed by punching an end surface of the housing to protrude inward.
5. The magnetic ring positioning and fixing structure as set forth in claim 1, wherein the orthographic projection of the positioning projection on the surface of the housing is fan-shaped.
6. The magnetic ring positioning and fixing structure as set forth in claim 1, wherein the number of the positioning projections is three, and the three positioning projections are annularly distributed with the axis of the housing as a center.
7. The magnetic ring positioning and fixing structure as set forth in claim 1, wherein a rotary connection portion is disposed at an axis of the housing, a positioning groove is formed between each positioning projection and the rotary connection portion, and the magnetic ring is disposed on the positioning groove.
8. The magnetic ring positioning and fixing structure as set forth in claim 7, wherein the rotary connection portion is used for connecting a rotary shaft of the motor, and the rotary connection portion is fixedly connected with the rotary shaft of the motor.
9. A hub motor is characterized by comprising the magnetic ring positioning and fixing structure according to any one of claims 1-8, wherein the hub motor comprises a base, a rotating shaft, a stator assembly, a rotor assembly, an end cover and a tire, the base is provided with a rotating connection cavity, one end of the rotating shaft is arranged on the rotating connection cavity, the other end of the rotating shaft is fixedly connected with a rotating connection part, the stator assembly is arranged on the base, the rotor assembly is arranged on a shell and opposite to the stator assembly, the outer diameter of the end cover is connected with the shell, the inner diameter of the end cover is rotatably connected with the base, and the tire is arranged outside the shell.
10. The hub motor of claim 9, wherein a bearing is disposed in the rotary connecting chamber, and one end of the rotary shaft is connected to the bearing, and the other end is fixedly connected to the rotary connecting portion.

Description

Magnetic ring positioning and fixing structure and hub motor Technical Field The utility model relates to the technical field of motors, in particular to a magnetic ring positioning and fixing structure and a hub motor. Background An electric motor, which is a device for converting electric energy into mechanical energy (or vice versa), plays a vital role in modern industry and daily life. From a professional perspective, the motor mainly works based on the principle of electromagnetic induction, and the core components of the motor generally comprise a stator, a rotor, electromagnetic windings and the like. In an electric machine, the stator is provided as a stationary part, typically with electromagnetic windings for generating a rotating magnetic field. The rotor is used as a rotating part and is stressed to rotate in a rotating magnetic field through electromagnetic induction, so that electric energy is converted into mechanical energy. In addition, the motor is also provided with a plurality of types so as to adapt to different application scenes. The hub motor is a power component applied to running equipment, such as electric vehicles, electric automobiles, wheel-foot robots and the like. The outer rotor is mainly used as power output to realize power running. However, the existing hub motor needs to internally install a magnetic ring, but the magnetic ring is high in accuracy and high in installation difficulty. Therefore, new designs are required for existing magnetic ring mounting structures. Disclosure of utility model In order to solve the problems, the utility model simplifies the installation process of the magnetic ring, reduces the assembly difficulty, and also remarkably improves the overall performance of the hub motor. The magnetic ring positioning and fixing structure comprises a shell and a magnetic ring, wherein a plurality of positioning convex blocks which are annularly and uniformly distributed with the axis of the shell as the center are arranged on the shell, the magnetic ring is arranged on the shell, and the magnetic ring is positioned by each positioning convex block so that the axis of the magnetic ring is coaxial with the axis of the shell. The technical scheme is further improved in that each positioning lug forms a positioning surface towards one side of the axle center of the shell, and each positioning surface is used for positioning the magnetic ring. The technical scheme is further improved in that the positioning surface is of an arc-shaped structure consistent with the curvature radius of the magnetic ring. A further development of the above-described embodiment provides that the positioning projections are formed by stamping an end face of the housing to protrude inwards. A further improvement of the above solution is that the orthographic projection of the positioning projection on the surface of the housing is fan-shaped. The technical scheme is further improved in that the number of the positioning protruding blocks is three, and the three positioning protruding blocks are annularly and uniformly distributed by taking the axle center of the shell as the center. The technical scheme is further improved in that a rotary connecting part is arranged at the axis of the shell, a positioning groove is formed between each positioning lug and the rotary connecting part, and the magnetic ring is arranged on the positioning groove. The technical scheme is further improved in that the rotary connecting part is used for connecting a rotary shaft of the motor, and the rotary connecting part is fixedly connected with the rotary shaft of the motor. The hub motor comprises a base, a rotating shaft, a stator assembly, a rotor assembly, an end cover and a tire, wherein the base is provided with a rotating connection cavity, one end of the rotating shaft is arranged on the rotating connection cavity, the other end of the rotating shaft is fixedly connected with the rotating connection part, the stator assembly is arranged on the base, the rotor assembly is arranged on the shell and opposite to the stator assembly, the outer diameter of the end cover is connected with the shell, the inner diameter of the end cover is rotatably connected with the base, and the tire is arranged outside the shell. The rotor assembly comprises a plurality of rotor magnetic steels, a plurality of rotor fixing grooves are formed in the rotor support, the rotor magnetic steels are correspondingly arranged on the plurality of rotor fixing grooves, the stator assembly comprises a stator support and a coil winding, the stator support is provided with a plurality of winding arms, and the coil winding is arranged on the winding arms. The base is provided with a placement groove, a PCB board is arranged on the placement groove, an induction component is arranged on the PCB board, and the induction component corresponds to the magnetic ring. The technical scheme is further improved in that a plurality of positionin