CN218887756U - Brush subassembly and motor - Google Patents

Abstract

The utility model discloses a brush subassembly and motor. The electric brush assembly comprises an electric brush assembly and a torsion spring, wherein one end of the electric brush along the length direction is used for being in contact with the conductive part; the torsion spring is provided with a main body section, a first torsion leg and a second torsion leg; the main body segment surrounds a lumen, the first torsion leg extends from the main body segment to the axial direction of the lumen, and the second torsion leg extends from the main body segment to the outer side of the main body segment and protrudes out of the main body segment; the main body section is fixedly arranged, and the second twisting foot abuts against the end part of the electric brush. The utility model provides a brush subassembly and motor, the first pin of torsional spring extends towards the axis direction of lumen and not extends to the main part section outside, has reduced the overall dimension of torsional spring, and then can further reduce the overall dimension of motor. The fixed column is used for fixed main part section, sets up corresponding structure and first torsion foot on the fixed column and cooperatees in order to fix first torsion foot, has increased the function of fixed column, and for the basis that reduces the whole size of torsional spring and provide.

Description

Brush subassembly and motor

Technical Field

The utility model relates to a brush subassembly and motor.

Background

Brushed motors are common drive devices. The brush motor has long application history and relatively mature technology. The common brush motor has a basically shaped structure, and the improvement is not easy. However, with the increase of the application fields, new requirements such as service life and effective utilization rate are continuously put forward on the structure of the motor. The service life of the brush assembly, which is an important component of the brush motor, is also related to the overall service life of the motor, even the determining part of the service life of the motor. Since the brush is worn during use, the wear of the brush will end the service life of the motor. In addition, in some fields of use of motors, the size of the motor is strictly limited, so how to improve the service life of the motor without increasing the overall size of the motor is also one of the main problems to be faced in the field of motors. One of them motor adopts elastomeric element to support the carbon brush so that the carbon brush uses for a long time, in order to increase the area of contact torsional spring and brush, the torsional spring need use leaf spring or leaf spring. Due to the structural design, the sizes of the torsion spring and the whole carbon brush assembly are increased. For motors used in automobiles, the size requirement is higher and higher, and the smaller the motor size, the better. Therefore, how to reduce the size of the brush assembly to further reduce the overall size of the motor is one of the main technical problems faced in the art.

SUMMERY OF THE UTILITY MODEL

One of the objects of the present invention is to provide a brush assembly with a smaller size in order to overcome the disadvantages of the prior art.

In order to achieve the purpose, the method is realized by the following technical scheme:

a brush assembly, comprising:

a brush having one end in a length direction for contacting the conductive member;

a torsion spring having a main body section, a first torsion leg and a second torsion leg; the main body segment surrounds a lumen, the first torsion leg extends from the main body segment to the inside of the lumen along the radial direction of the lumen, and the second torsion leg extends from the main body segment to the outside of the main body segment and protrudes out of the main body segment;

the main body section is fixedly arranged, and the second twisting foot abuts against the end part of the electric brush.

According to the utility model discloses an embodiment still includes the fixed column, the main part section suit is in on the fixed column, first torsion foot with the fixed column is connected.

According to the utility model discloses an embodiment, the tip of fixed column is provided with the recess, first round pin joint in the recess.

According to an embodiment of the invention, the torsion spring is a cylindrical helical torsion spring.

According to the utility model discloses an embodiment still includes the supporting seat, the fixed column sets up on the supporting seat.

According to an embodiment of the present invention, the brush is a carbon brush.

According to an embodiment of the invention, the brush is a straight cylindrical shape.

An electric machine, comprising:

the foregoing brush assembly;

a stator;

a rotor;

one end of the electric brush is contacted with the rotor, and the other end of the electric brush is propped against by the second torsion pin of the torsion spring.

The utility model provides a brush subassembly and motor, the first pin of torsional spring extends towards the axis direction of lumen and not extends to the main part section outside, has reduced the overall dimension of torsional spring, and then can further reduce the overall dimension of motor. The fixed column is used for fixed main part section, sets up corresponding structure and first torsion foot on the fixed column and cooperatees in order to fix first torsion foot, has increased the function of fixed column, and the basis that provides for reducing the overall dimension of torsional spring.

Drawings

Fig. 1 is a schematic view of a motor structure in the present invention.

Fig. 2 is a schematic view of a local structure of the motor of the present invention.

Fig. 3 is a schematic diagram of the torsion spring structure of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments:

as shown in fig. 1, the motor 100 includes a support base 110, a stator 120, a rotor (not shown), and a brush assembly 140. The support base 110 serves to support the stator 120, the rotor and the brush assembly 140. The rotor is rotatably disposed on the supporting base 110, and the stator 120 is disposed around the rotor. Stator 120, when energized, drives the rotor to rotate. Brush assembly 140 is used for power transmission.

As shown in fig. 2 and 3, the support seat 110 includes a support seat body 111. The supporting seat body 111 is a cylinder. The supporting seat body 111 is provided with a cylindrical cavity 112 at the center. The cartridge cavity 112 is used to mount the rotor. Two brush holders 114 are provided at the end of the support base body 111. The brush holder 114 is provided with a receiving through-hole 115 receiving the brush 141, the receiving through-hole 115 for receiving the brush 141 and allowing the brush 141 to move therein. One end of the accommodating through hole 115 is communicated with the cylinder cavity 112, and the other end is arranged in an open manner.

The supporting seat body 111 is further provided with a fixing column 117. The fixing posts 117 extend upward from the support body 111 and protrude from the upper end of the support body 111. The shape of the fixing post 117 is adapted to the shape of the main body section 151 of the torsion spring 150. In the example shown, the fixing posts 117 are cylindrical in shape. An upper end 1171 of securement post 117 is provided with a recess 118. The recess 118 extends radially through the fixing post 117 and axially to a selected depth. The fixing post 117 is provided at one side of the brush holder 114.

The motor 100 of the present invention further includes a brush assembly 140. Brush assembly 140 includes a brush 141, a shunt 142, and a torsion spring 150. The brush 141 is a linear column shape, and in the example shown in the figure, the brush 141 is a rectangular parallelepiped column shape. The brush 141 is a carbon brush, and the material thereof may be graphite, impregnated graphite, or metal graphite. The brush 141 is disposed in the receiving through hole 115 of the brush holder 114 and is movable in a length direction of the brush holder 114. One end 1411 of the brush 141 is in contact with the rotor, and the other end 1412 is provided with the shunt 142.

The torsion spring 150 serves to apply a force to the brush 141 such that the brush 141 is always in contact with the rotor. According to one embodiment of the present invention, the torsion spring 150 is a cylindrical helical torsion spring, which includes a main body segment 151, a first torsion leg 152 and a second torsion leg 153. Body segment 151, first torsion leg 152 and second torsion leg 153 are integrally provided. The first torsion leg 152 and the second torsion leg 153 each have a certain elasticity. The main body segment 151 defines a lumen 154. According to a preferred embodiment of the present invention, the main body segment 151 is tubular. First torsion leg 152 extends from body segment 151 radially along body segment 151 toward lumen 154. The second torsion leg 153 extends from the main body segment 151 to the outside of the main body segment 151 and protrudes from the main body segment 151.

The main body segment 151 is fitted over the fixing post 117. The first torsion leg 152 snaps into the recess 1172 and the second torsion leg 153 abuts the other end 1412 of the brush 141. The torsion spring 150 has elasticity, and biases the brush 141 by the second torsion leg 153, so that one end of the brush 141 is always in contact with the rotor. When the brush 141 is worn with use, the elastic force of the second torsion leg 153 can push the worn brush 141 to the rotor all the time, so that the brush 141 can still keep contact with the rotor after being worn.

The utility model provides a brush subassembly and motor, the first pin of torsional spring extends towards the axis direction of lumen and not extends to the main part section outside, has reduced the overall dimension of torsional spring, and then can further reduce the overall dimension of motor. The fixed column is used for fixed main part section, sets up corresponding structure and first torsion foot on the fixed column and cooperatees in order to fix first torsion foot, has increased the function of fixed column, and the basis that provides for reducing the overall dimension of torsional spring.

The embodiments of the present invention are only used for illustration, and do not limit the scope of the claims, and other substantially equivalent alternatives that may be conceived by those skilled in the art are within the scope of the present invention.

Claims (8)

1. A brush assembly, comprising:

a brush having one end in a length direction for contacting the conductive member;

a torsion spring having a main body section, a first torsion leg and a second torsion leg; the main body segment surrounds a lumen, the first torsion leg extends from the main body segment to the inside of the lumen along the radial direction of the lumen, and the second torsion leg extends from the main body segment to the outside of the main body segment and protrudes out of the main body segment;

the main body section is fixedly arranged, and the second twisting foot abuts against the end part of the electric brush.

2. The brush assembly according to claim 1, further comprising an anchor post, wherein the main body segment is sleeved over the anchor post, and the first torsion leg is connected to the anchor post.

3. The brush assembly of claim 2, wherein an end of the fixing post is provided with a groove, and the first torsion pin is snapped into the groove.

4. The brush assembly according to claim 3, further comprising a support base, wherein the fixing posts are disposed on the support base.

5. The brush assembly of claim 1, wherein the torsion spring is a cylindrical helical torsion spring.

6. The brush assembly of claim 1, wherein the brush is a carbon brush.

7. The brush assembly of claim 1, wherein the brush is rectilinear.

8. An electric machine, comprising:

a brush assembly according to any one of claims 1 to 7;

a stator;

a rotor;

one end of the electric brush is contacted with the rotor, and the other end of the electric brush is propped against by the second torsion pin of the torsion spring.

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