KR20130075118A

KR20130075118A - Brush-holder apparatus

Info

Publication number: KR20130075118A
Application number: KR1020110143339A
Authority: KR
Inventors: 정강수
Original assignee: (주) 보쉬전장
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2013-07-05

Abstract

PURPOSE: A brush holder device for reducing noise and maintaining the stable position of a brush is provided to form the outer surface of the brush to be tilted, thereby extending the lifetime of the brush. CONSTITUTION: A brush holder device for reducing noise and maintaining the stable position of a brush includes a brush holder (100), the brush (20), and a brush spring (30). The brush holder is installed outside a commutator (200). The brush holder has at least two brush boxes. The brush is in contact with the commutator. The brush spring is installed at the brush holder. The brush spring pressurizes the brush toward the commutator.

Description

Brush holder device for noise reduction and stable posture of brushes

According to the present invention, a part of the opposite surface opposite to one surface of the brush contacting the commutator is inclined at an angle, and the upper part or the lower part of the brush and the brush box are stably centered in the brush box even when the brush is forced to the left and right by friction with the commutator. The spring is formed so as to be located in, and the spring for pushing the brush to the commutator is directed to a brush holder device for noise reduction and stable posture of the brush configured to act in the axial center direction of the commutator.

Currently, most brushes are manufactured with the opposite (outer) face of the commutator at right angles to the longitudinal direction. As the brush wear progresses, the direction of frictional force between the brush and the commutator is changed, resulting in a change in noise and performance.

In addition, the brush and the brush holder is applied to the commutator parallel to the groove of the commutator is made of a rectangular portion is rubbed. In this case, when the play of the product increases, there is a problem of noise generation.

In addition, the brush spring is assembled in the vertical direction of the amateur shaft. As the brush wear progresses, the force of the spring is off the center of the shaft, causing damage to the commutator and the brush when the motor rotates, causing noise increase and noise in the reverse direction. do.

The present invention has been made to solve the above problems, an object of the present invention is to provide a brush holder device according to the present invention that can reduce noise and performance changes due to brush wear.

An object of the present invention as described above is installed on the outside of the commutator is rotated, the brush holder is provided with at least two brush boxes; A brush guided to the brush box and in contact with the commutator; Brush spring installed in the brush holder to press the brush to the commutator side to maintain contact with the brush and the commutator, even if the brush is worn by friction due to the contact of the brush and commutator brush spring always press the brush in the direction of the commutator axis of rotation It is achieved by a brush holder device for reducing noise and maintaining a stable posture of the brush, characterized in that comprising a.

Here, the brush is characterized in that all or part of the opposite surface opposite to one surface of the brush in contact with the commutator is inclined at a predetermined angle.

In addition, the brush box and the upper or lower portion of the brush to form a bend to prevent the brush from being separated from the center of the brush box even if the brush is applied to the left and right by the friction force of the brush and commutator, the bent portion "V" In the shape, the internal angle is characterized by having an angle of 30 to 60 °.

According to the present invention, the brush outer surface is inclined so that the direction in which the brush spring is pushed is always constant even when the brush is worn, thereby reducing noise and performance change due to wear.

In addition, since the upper or lower portion of the brush and the brush box is V-shaped, even if the brush is applied to the left and right by the friction force of the commutator when the motor is operated, the brush can be stably positioned in the center of the brush box.

In addition, since the force of the spring acts in the axial center direction of the commutator, wear of the commutator and the brush can be reduced, thereby reducing noise and extending the life.

1 is a view showing the object to which the brush holder device and the brush holder device according to the present invention is applied,
FIG. 2 is a view showing a partial AA cross-sectional view of the commutator 200 and the brush holder device of FIG. 1, and an operation relationship between the brush holder device;
3 is a view illustrating a cross-sectional view taken along line AA of FIG. 2;
4 is a side view of FIG. 2
5 is an enlarged view of main parts of the brush holder device according to the present invention;
6 shows various examples of brushes according to the invention;

The present invention relates to a brush holder device that can reduce noise and performance changes due to brush wear, and is installed outside the rotating commutator (200) and provided with at least two brush boxes (10) brush holder (100) And, the brush 20 is guided to the brush box 10 is in contact with the commutator 200, the brush holder 100 is installed in the brush 20 to maintain contact with the commutator 200 While pressing the brush 20 to the commutator 200 side, even if the brush 20 wears due to the friction of the contact between the brush 20 and the commutator 200, the brush 20 is always in the direction of the rotation axis 201 of the commutator 200. It includes a brush spring (30) for pressing.

The brush 20 has an opposite surface opposite to one surface of the brush 20 in contact with the commutator 200 is inclined at a predetermined angle, or an opposite surface opposite to one surface of the brush 20 in contact with the commutator 200. Some of them are inclined at a certain angle.

In addition, the brush box 10 is the brush box 10 is the upper or lower portion of the brush box 10 and the brush 20, even if the brush 20 is applied to the left and right by friction between the brush 20 and the commutator 200. It is characterized in that the bent portion (13, 23) is formed in order to prevent the deviation from the center of the bent portion (13, 23) is a "V" shape, the internal angle has an angle of 30 ~ 120 ° Is characteristic.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in detail.

As shown in FIG. 1, the brush holder device according to the present invention supports the brush 20 in contact with the commutator 200, and maintains the contact even when the brush 20 wears out by friction with the commutator 200. As a brush holder 100 and a brush 20 and a brush spring 30 is included.

The brush holder 100 is installed outside the rotating commutator 200, and includes at least two brush boxes 10 and a support 31 for supporting the brush spring 30. Here, the brush box 10 has an inner circumferential surface of a substantially pentagonal column, including a bent portion 13 having an angle of 30 to 120 °, and an upper portion of the brush box 10 moves the pressing portion 30a of the brush spring 30. The first cutting groove 11 for securing a path is formed, and the second cutting groove 12 for securing a movement path of the lead wire 41 connected to the brush 20 is formed at a side surface thereof.

Brush 20 is guided to the brush box 10 and in contact with the commutator 200 by the brush spring 30, such brush 20 corresponds to the shape of the inner peripheral surface of the brush box 10 It has an outer circumferential surface, the inner angle includes a bent portion 23 having an angle of 30 ~ 120 °, the lead wire 41 is connected to the side, the opposite surface of the surface in contact with the commutator 200 is inclined surface ( 21, 21 ') are formed. Here, the inclined surfaces 21 and 21 ′ may be inclined surfaces 21 ′ in which one surface of the brush 20 is inclined as shown in FIG. 6, or may be inclined surfaces 21 inclined only partially. Since the spring 30 is pressurized while rotating in the direction of the rotation axis 201 of the commutator 200, when the brush 20 has such inclined surfaces 21 and 21 ′, the brush spring 30 moves the brush 20 to the brush box. While being in close contact with the bent portion 13 of (10), it can be pushed toward the commutator 200 side and is stable.

And forming the bent portion 13 in the lower portion of the brush 20 and the brush box 10 as described above is stable even when the brush 20 is applied to the left and right by the friction force of the commutator 200 during motor operation. It is to be located in the center of the 100, because of this, even if the brush 20 is worn out by friction with the commutator 200, the play is not large, noise is reduced compared to the prior art.

The brush spring 30 is installed in the brush holder 100 and presses the brush 20 toward the commutator 200 to maintain contact between the brush 20 and the commutator 200, but the brush 20 and commutator 200 Even when the brush 20 wears due to the friction caused by the contact of the brush 20, the brush 20 is always configured to press the direction of the rotation axis 201 of the commutator 200. Most of the brush springs 30 are wound around the support 31. The pressing unit 30a pushes the brush 20 in the direction of the rotation axis 201 of the commutator 200, and the fixing unit 30b is fixed to the brush holder 100.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will readily occur to those skilled in the art without departing from the spirit and scope of the invention. Therefore, it should be understood that the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense, and that the true scope of the invention is indicated by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof, .

100: brush holder 200: commutator
201: axis of rotation 10: brush box
20: brush 30: brush spring

Claims

A brush holder 100 installed outside the rotating commutator 200 and provided with at least two brush boxes 10;
A brush 20 guided to the brush box 10 and in contact with the commutator 200;
Is installed in the brush holder 100, the brush 20 to press the brush 20 to the commutator 200 to maintain contact with the brush 20 and the commutator 200, the contact of the brush 20 and commutator 200 Brush spring 30 for always pressing the brush 20 in the direction of the rotation axis 201 of the commutator 200 even if the brush 20 is worn by friction by;
Brush holder device for reducing noise and maintaining a stable posture of the brush, characterized in that comprising a.

The method of claim 1,
The brush 20 is a brush holder device for reducing noise and maintaining a stable posture of the brush, characterized in that the opposite surface opposite to one surface of the brush 20 in contact with the commutator 200 is inclined at a predetermined angle.

The method of claim 1,
The brush 20 is a brush holder device for reducing noise and maintaining a stable posture of the brush, characterized in that some of the opposite surface opposite to one surface of the brush 20 in contact with the commutator 200 inclined at a predetermined angle.

The method of claim 1,
The brush box 10 is the center of the brush box 10 even if the brush box 10 is applied to the upper or lower portion of the brush box 10 and the brush 20 by the friction force between the brush 20 and the commutator 200. Brush holder device for reducing noise and maintaining a stable posture of the brush, characterized in that for forming a bent portion (13, 23) to prevent the deviation from.

5. The method of claim 4,
The bent portion (13,23) is a "V" shape, the brush holder device for noise reduction and maintaining a stable posture of the brush, characterized in that the inner angle has an angle of 30 ~ 120 °.