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CN-224233456-U - Brush assembly, motor and electric tool

CN224233456UCN 224233456 UCN224233456 UCN 224233456UCN-224233456-U

Abstract

The application discloses a brush assembly, a motor and an electric tool, wherein the brush assembly comprises a brush frame, a brush body, a scroll coil spring and a scroll coil spring, wherein the brush body is arranged on the brush frame, a stop groove is formed in the surface of the brush body, the scroll coil spring is arranged on the brush frame, the scroll coil spring comprises a tension part in contact with the brush body and a compression part coiled on the brush frame, the tension part comprises a working position and a dismounting position separated from the working position, and the tension part in the dismounting position is at least partially positioned in the stop groove. The design can be favorable for realizing modularized assembly of the brush assembly, reduces the maintenance difficulty of the rotor and improves the service life of the brush.

Inventors

  • ZHANG ZONGZONG

Assignees

  • 江苏东成工具科技有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (10)

  1. 1. A brush assembly, comprising: A brush holder; the brush body is arranged on the brush frame, and a stop groove is formed in the surface of the brush body; The scroll coil spring is arranged on the brush frame and comprises a tension part abutting against the brush body and a compression part coiled on the brush frame, the tension part comprises a working position and a dismounting position separated from the working position, and the tension part in the dismounting position is at least partially positioned in the stop groove.
  2. 2. The brush assembly of claim 1, wherein: the brush body comprises a first surface and a second surface which are adjacent to each other, the stop groove is formed in the first surface, and the tension part in the working position is abutted against the second surface.
  3. 3. A brush assembly according to claim 2, wherein: The tension part in the working position is abutted against the abutting position of the second surface and the first surface.
  4. 4. A brush assembly according to claim 2, wherein: The brush body comprises a third surface opposite to the second surface, the stop groove is arranged close to the first surface, and the distance between the stop groove and the first surface is smaller than the distance between the stop groove and the third surface.
  5. 5. The brush assembly of claim 1, wherein: The brush body is connected to the brush frame in an up-and-down sliding way, and the brush body moves upwards to enable the tension part to move from the working position to the dismounting position.
  6. 6. The brush assembly of claim 5, wherein: The brush body moves downwards to enable the tension part to move from the dismounting position to the working position, and enable the tension part to increase the vertical acting force applied to the brush body and reduce the horizontal acting force applied to the brush body.
  7. 7. The brush assembly of claim 1, wherein: The tension part is in a bent shape, and the movable end of the tension part faces away from the brush body.
  8. 8. The brush assembly of claim 1, wherein: the stop groove is an arc groove.
  9. 9. An electric motor, characterized in that: A brush assembly comprising any one of claims 1 to 8.
  10. 10. An electric tool, characterized in that: Comprising the motor of claim 9.

Description

Brush assembly, motor and electric tool Technical Field The embodiment of the application relates to the technical field of tools, in particular to an electric brush assembly, a motor and an electric tool. Background The brush used conventionally can only meet the effect of transmitting energy by being worn in cooperation with the commutator of the motor, and lacks some auxiliary functions. When the rotor of the motor is in a problem in the use process and needs to be overhauled or replaced, the scroll coil spring needs to be pulled away from the position of the electric brush, and then the electric brush needs to be peeled off from the contact surface of the rotor commutator of the rotating motor, so that the rotor of the rotating motor can be detached from the machine. However, the operation mode is complicated, and no stop structure participates after the brush is stripped from the surface of the rotor commutator of the rotating motor, so that the brush can slide in along the metal brush frame matching guide groove when the rotor is disassembled, and further contacts with the surface of the rotor commutator, thereby influencing the replacement and overhaul of the rotor. The scroll spring is normally supported on the nearby metal brush holder after the brush is peeled off, but some scroll springs have no stable supporting position on the metal brush holder after the brush is peeled off due to the structural shape of the metal brush holder. The spiral spring can only return to the initial loose state, and the spiral spring is adjusted to the tensioning state by the auxiliary tool after the rotor is replaced or overhauled. The operation mode not only increases the difficulty of replacing and overhauling the rotor, but also can cause different force values with the initial scroll spring due to improper operation when the scroll spring is readjusted to a tensioning state, and the service life of the electric brush is influenced. Because the existing structure has no effective stop structure and the electric brush is extruded by the elasticity of the scroll spring under the tension state of the scroll spring during assembly, only the two-piece integrated assembly of the metal brush frame and the scroll spring can be realized. The electric brush needs to be arranged and installed independently when the whole machine is assembled, and the assembly of three parts of the metal brush frame, the scroll coil spring and the electric brush cannot be realized, so that the production and assembly efficiency of the whole machine can be greatly influenced, and meanwhile, the defect is brought to the realization of assembly and modularized production. Disclosure of utility model Aiming at the defects of the prior art, the application provides the electric brush assembly, the motor and the electric tool, which can be favorable for realizing modularized assembly of the electric brush assembly, reduce the maintenance difficulty of a rotor and prolong the service life of the electric brush. The present application provides a brush assembly comprising: A brush holder; the brush body is arranged on the brush frame, and a stop groove is formed in the surface of the brush body; The scroll coil spring is arranged on the brush frame and comprises a tension part abutting against the brush body and a compression part coiled on the brush frame, the tension part comprises a working position and a dismounting position separated from the working position, and the tension part in the dismounting position is at least partially positioned in the stop groove. The brush body comprises a first surface and a second surface which are adjacent to each other, the stop groove is arranged on the first surface, and the tension part in the working position is abutted against the second surface. The tension part in the working position is abutted against the abutting position of the second surface and the first surface. The brush body comprises a third surface opposite to the second surface, the stop groove is arranged close to the first surface, and the distance between the stop groove and the first surface is smaller than the distance between the stop groove and the third surface. The brush body is connected to the brush frame in a vertical sliding way, and the brush body moves upwards to enable the tension part to move from the working position to the dismounting position. The brush body moves downwards to enable the tension part to move from the dismounting position to the working position, and enables the tension part to increase the vertical acting force applied to the brush body and reduce the horizontal acting force applied to the brush body. The further improvement is that the tension part is in a bending shape, and the movable end of the tension part faces away from the brush body. The further improvement scheme is that the stop groove is an arc groove. The application provides a motor, which comprises the electric brush assembly. The applicati