JP2010259200A - Motor brush device and motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor brush device and a motor which contributes to reduction in the number of components. <P>SOLUTION: Pigtails 33a, 33c, 33e (or 33b, 33d, 33f), extending respectively from brushes 16a, 16c, 16e (or brushes 16b, 16d, 16f) of the same pole, are wound around on the counter-brush side of a base member 13 and are bundled and collectively connected to the power supply terminals 31 (or 32) of the same pole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a brush device for a motor and a motor.

  2. Description of the Related Art Conventionally, a motor brush device includes a base member supported by a motor housing, two or more brushes disposed on the base member, each provided with positive and negative electrodes, and a positive member provided on the surface of the base member on the side opposite to the brush. A negative electrode power supply terminal and a pigtail extending from each brush and electrically connecting the brush and the power supply terminal are provided (see, for example, Patent Document 1). The pigtails extending from the same-polarity brushes are electrically connected to each other by an arc-shaped terminal member provided on the base member. Each pigtail is connected to the terminal member by welding or the like in the vicinity of the connected brush, and power is supplied to the brush through the terminal member and the pigtail.

Japanese Patent Laid-Open No. 5-288143

  By the way, in the brush device as described above, since each pigtail has to be individually connected to the terminal member by welding or the like, the number of assembling steps is increased, and an improvement in this respect is demanded.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor brush device and a motor that can contribute to a reduction in man-hours.

  In order to solve the above problems, the invention according to claim 1 is a base member supported by a motor housing, a brush disposed on the base member and provided with two or more positive and negative electrodes, and the base member. A brush apparatus for a motor comprising positive and negative power supply terminals provided on the surface of the non-brush side, and a pigtail extending from each brush and electrically connecting the brush and the power supply terminal The pigtails extending from the same-polarity brushes are routed on the opposite brush side of the base member and are collectively connected to the power supply terminals having the same polarity as the brushes. Features.

  In the present invention, each pigtail of the same polarity is grouped and connected to the power supply terminal of the same polarity, which contributes to the reduction in man-hours compared to the case where the pigtails are individually connected to the power supply terminals. It becomes possible. Further, since each pigtail is routed on the side opposite to the brush of the base member, it can be connected to each pigtail without having a complicated shape of the power supply terminal.

  According to a second aspect of the present invention, in the motor brush device according to the first aspect, the pigtail and the power supply terminal are fastened and fixed to the base member by screws.

In the present invention, the pigtail and the power supply terminal can be easily fixed to the base member.
According to a third aspect of the present invention, in the motor brush device according to the second aspect, the pigtail and the power supply terminal are stacked, and each has a screw insertion portion through which the screw is inserted in the stacking direction. Features.

  According to the present invention, the pigtail and the power supply terminal are fastened and fixed by the screws inserted in the stacking direction thereof, so that the pigtail and the power supply terminal can be firmly fixed to the base member.

  According to a fourth aspect of the present invention, in the motor brush device according to the second or third aspect, the pigtail and the power supply terminal having the same polarity are fixed by one screw, and the base member is fixed to the base member. Is characterized in that an anti-rotation wall for preventing rotation of the power supply terminal around the screw is formed.

In this invention, rotation around the screw of the power supply terminal can be prevented.
A fifth aspect of the present invention is a motor including the brush device according to any one of the first to fourth aspects.

  According to the present invention, it is possible to provide a motor that can contribute to a reduction in man-hours.

  Therefore, according to the above described invention, it is possible to contribute to the reduction of man-hours.

The schematic plan view for demonstrating the brush apparatus of the motor of this embodiment. The top view which looked at the brush apparatus from the anti-brush side. Sectional drawing which shows typically the connection part of a pigtail and an electric power feeding terminal. Sectional drawing which shows typically the connection part of the pigtail and electric power feeding terminal in another example. Sectional drawing which shows typically the connection part of the pigtail and electric power feeding terminal in another example.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, the brush device 11 of the motor 10 of this embodiment includes a base member 13 supported by a motor housing 12, six brush boxes 14 fixed to the base member 13, and each brush box. 14, and brushes 16 a to 16 f that are in sliding contact with a commutator (not shown) of the motor 10. The six brushes 16a to 16f are arranged at equal intervals in the circumferential direction. The one arranged at the upper right in FIG. 1 is a first brush 16a, and the second brush is sequentially turned clockwise from the first brush 16a. The description will be made as the brush 16b to the sixth brush 16f.

  The base member 13 is formed of an insulating material (resin or the like), and is floatingly supported on the motor housing 12 by three support portions 21a to 21c. A through hole 13a penetrating in the motor shaft direction is formed at the center of the base member 13, and a rotation shaft (not shown) of the motor 10 is inserted into the through hole 13a. The rotating commutator is configured such that inner end portions of the brushes 16a to 16f are in contact with each other.

  The support portions 21a to 21c are provided between the first brush 16a and the sixth brush 16f, between the second brush 16b and the third brush 16c, and between the fourth brush 16d and the fifth brush 16e, respectively. ing. The support portions 21a to 21c are arranged at equal intervals in the circumferential direction. Each of the support portions 21 a to 21 c includes a vibration isolating rubber 22 and a screw 23, and the base member 13 is configured to be screwed and fixed to the motor housing 12 via the vibration isolating rubber 22. The support portions 21 a to 21 c are assembled to the base member 13 from the radially outer side.

  On the side of the base member 13, a positive power supply terminal 31 and a negative power supply terminal 32 for supplying power to the brushes 16 a to 16 f are provided. The positive power supply terminal 31 is provided in the vicinity of the first brush 16a (the side of the first brush 16a in FIGS. 1 and 2), and the negative power supply terminal 32 is in the vicinity of the sixth brush 16f. (A side of the sixth brush 16f in FIGS. 1 and 2). Each of the power supply terminals 31 and 32 has a rectangular flat plate shape, and is disposed between the rotation prevention walls 13b formed on the base member 13 so as to protrude in the motor axial direction. The rotation prevention walls 13b are provided in pairs so as to sandwich the power supply terminal 31 on the positive electrode side and the power supply terminal 32 on the negative electrode side, respectively.

  The base ends of the pigtails 33a to 33f are connected to the upper surfaces of the first to sixth brushes 16a to 16f, respectively. The pigtails 33a to 33f are made by twisting a large number of thin wires made of copper. Pigtails 33a to 33f extending from the brushes 16a to 16f are respectively inserted into the notch grooves 34 formed in the base member 13 and extend to the back surface side (anti-brush side) of the base member 13. As shown in FIG. 2, the pigtails 33 a to 33 f are routed on the back surface side of the base member 13, and their tip portions are electrically connected to the power supply terminals 31 and 32. 2 is a plan view of the brush device 11 as viewed from the back surface side (the anti-brush side), and the front and back are opposite to those in FIG. Further, a notch groove 34 for holding the pigtails 33a and 33b of the first and second brushes 16a and 16b is formed between the first and second brushes 16a and 16b. A notch groove 34 for holding the pigtails 33c and 33d of the third and fourth brushes 16c and 16d, respectively, is formed between the third and fourth brushes 16c and 16d. And the notch groove 34 holding the pigtails 33e and 33f of the fifth and sixth brushes 16e and 16f, respectively, is formed between the fifth and sixth brushes 16e and 16f.

  Pigtails 33a, 33c, and 33e extending from the first, third, and fifth brushes 16a, 16c, and 16e, respectively, are collectively connected to the positive-side power supply terminal 31, and the second, fourth, and sixth brushes 16b and 16d are connected together. , 16f respectively extending from the tails 33b, 33d, and 33f are collectively connected to the negative-side power supply terminal 32. As a result, power from the positive-side power supply terminal 31 is supplied to the first, third, and fifth brushes 16a, 16c, and 16e, and power from the negative-side power supply terminal 32 is supplied to the second, fourth, and sixth brushes 16b. , 16d, and 16f can be supplied, and the polarities of the brushes 16a to 16f are alternately configured in the circumferential direction.

  The pigtail 33c of the third brush 16c and the pigtail 33d of the fourth brush 16d are routed so as to pass through the inner peripheral sides of the support portions 21b and 21c, respectively. The pigtail 33c of the third brush 16c extends through the outer peripheral side of the pigtail 33c of the second brush 16b to the power supply terminal 31 on the positive electrode side. In a similar manner, the pigtail 33d of the fourth brush 16d extends through the outer peripheral side of the pigtail 33e of the fifth brush 16e to the power supply terminal 32 on the negative electrode side.

  The pigtail 33e of the fifth brush 16e extends to the positive power supply terminal 31 through the inner peripheral side of the support portion 21a, and the pigtail 33b of the second brush 16b passes through the inner peripheral side of the support portion 21a. It extends to the power supply terminal 32 on the side. The pigtails 33b and 33e are crossed at a position on the inner peripheral side of the support portion 21a, and this portion is configured to be electrically insulated. In the handling mode of the present embodiment, the portion where the pigtails 33a to 33f of different polarities cross is only the above-mentioned one portion, so that the reliability of electrical insulation between the different polarities is improved.

[Configuration of the connection between the power supply terminal and the pigtail]
The connecting portion between the positive feeding terminal 31 and the tip of the pigtails 33a, 33c, 33e and the connecting portion between the negative feeding terminal 32 and the tip of the pigtails 33b, 33d, 33f have the same configuration. ing. Therefore, the configuration of the connection portion will be described by taking the positive electrode side (see FIG. 3) as an example, and detailed description of the negative electrode side will be omitted.

  As shown in FIG. 3, the tips of the pigtails 33a, 33c, and 33e are stacked on the base member 13 in the motor axial direction (vertical direction in FIG. 3). The power supply terminal 31 is disposed on the stacked pigtails 33a, 33c, and 33e. A screw insertion hole 35 (screw insertion portion) penetrating in the motor shaft direction is formed in the laminated portion of the power supply terminal 31 and the pigtails 33a, 33c, and 33e, and the terminal is fixed to be inserted into the screw insertion hole 35. The screw 36 is fastened and fixed to the base member 13. As a result, the power supply terminal 31 and the tip ends of the pigtails 33a, 33c, 33e are sandwiched and fixed between the head portion 36a of the screw 36 and the base member 13 in the motor shaft direction. Each of the pigtails 33 a to 33 f is divided into two forks at the screw insertion hole 35, but they are gathered together at the tip and are prevented from being detached from the terminal fixing screw 36.

  In the present embodiment, as described above, the pigtails 33a to 33f are grouped together with the same polarity and connected to the power supply terminals 31 and 32. Therefore, compared to the case where the pigtails are individually connected to the power supply terminals as in the prior art. Therefore, it is possible to contribute to the reduction of man-hours. Further, as shown in FIG. 2, the anti-rotation walls 13b are provided on both sides in the width direction (left and right direction in FIG. 2) of the power supply terminals 31, 32, respectively. The rotation around the terminal fixing screw 36 is prevented.

Next, characteristic effects of the present embodiment will be described.
(1) In this embodiment, the pigtails 33a, 33c, and 33e (or pigtails 33b, 33d, and 33f) extending from the same-polarity brushes 16a, 16c, and 16e (or the brushes 16b, 16d, and 16f) are formed on the base member 13, respectively. They are routed on the anti-brush side and are collectively connected to the same-polarity power supply terminal 31 (or power supply terminal 32). For this reason, it becomes possible to contribute to the reduction of a man-hour compared with the case where a pigtail is each connected to the electric power feeding terminals 31 and 32 like the prior art. In addition, since the pigtails 33a to 33f are routed on the side opposite to the brush of the base member 13, the pigtails 33a to 33f can be connected without the power supply terminals 31 and 32 having a complicated shape.

  (2) In the present embodiment, the pigtails 33a to 33f and the power supply terminals 31 and 32 are fastened and fixed to the base member 13 with screws, so that the pigtails 33a to 33f and the power supply terminals 31 and 32 are attached to the base member 13. On the other hand, it can be easily fixed.

  (3) In the present embodiment, the pigtails 33a to 33f and the power supply terminals 31 and 32 are stacked in the motor shaft direction, and have screw insertion holes 35 through which the terminal fixing screws 36 are inserted in the stacking direction. As a result, the pigtails 33a to 33f and the power supply terminals 31 and 32 are fastened and fixed by the screws 36 inserted in the stacking direction, so that the pigtails 33a to 33f and the power supply terminals 31 and 32 are firmly fixed to the base member 13. It becomes possible to do. Further, since the pigtails 33a to 33f and the power feeding terminals 31 and 32 are stacked in the motor axial direction, the radial space of these connecting portions can be kept small.

  (4) In the present embodiment, the pigtails 33a to 33f having the same polarity and the power supply terminals 31 and 32 are each fixed by one terminal fixing screw 36, and the base member 13 is formed with the rotation prevention wall 13b. Therefore, rotation around the terminal fixing screw 36 of the power supply terminals 31 and 32 can be prevented.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, each of the pigtails 33a to 33f is formed with a screw insertion hole 35 through which the terminal fixing screw 36 is inserted, and the same polarity pigtails 33a, 33c, 33f (or pigtails 33b, 33d, 33f) and the positive electrode The power supply terminal 31 on the side (or the power supply terminal 32 on the negative electrode side) is stacked and sandwiched between the base member 13 and the head portion 36a of the terminal fixing screw 36. For example, a pigtail as shown in FIG. 33a-33f is good also as a structure which does not have the screw insertion hole 35. FIG. 4 is a diagram showing the power supply terminal 31 and the pigtails 33a, 33c, and 33f on the positive electrode side as in FIG. 3, but the detailed description thereof is omitted because the negative electrode side has the same configuration. In the configuration shown in FIG. 4, the tip ends of the pigtails 33 a, 33 c, and 33 e are interposed between the base member 13 and the bent portion 31 a formed on the power supply terminal 31. The tip ends of the pigtails 33 a, 33 c, and 33 e are pressed against the base member 13 by the elastic force of the power supply terminal 31, and are thus stably held between the power supply terminal 31 and the base member 13. The power supply terminal 31 is fastened and fixed to the base member 13 with a terminal fixing screw 36. Even with such a configuration, it is possible to contribute to a reduction in the number of man-hours as in the above embodiment.

  In the above embodiment, as shown in FIG. 5, for example, a protrusion 13c that engages with the tip of the pigtails 33a, 33c, 33e may be formed on the base member 13 to prevent the pigtails 33a, 33c, 33e from coming off. . In addition, this protrusion part 13c is applicable also to a structure as shown in FIG.

  In the above embodiment, each pigtail 33a to 33f is divided into two forks at the portion of the screw insertion hole 35, and is integrated into one at the tip, but is not particularly limited to this, the tip is one It is good also as a structure which is not put together.

In the above-described embodiment, the pigtails 33a to 33f are connected together by the positive and negative electrodes by the terminal fixing screw 36, but may be connected together by welding, for example.
In the above-described embodiment, the number of brushes is six. However, the number of brushes is not particularly limited, and the number of brushes may be appropriately changed according to the configuration.

  -In above-mentioned embodiment, although each electric power feeding terminal 31 and 32 made rectangular shape, it is not limited to this in particular, You may change a shape suitably according to a structure.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 11 ... Brush apparatus, 12 ... Motor housing, 13 ... Base member, 13b ... Anti-rotation wall, 16a-16f ... 1st-6th brush, 31 ... Positive electrode side feeding terminal, 32 ... Negative electrode side Feed terminals, 33a to 33f... Pigtail, 35... Screw insertion hole as a screw insertion portion, 36.

Claims (5)

A base member supported by the motor housing;
A brush disposed on the base member and provided with two or more positive and negative electrodes, and
Positive and negative power supply terminals provided on the surface of the base member opposite to the brush;
A brush device for a motor, which is provided with a pigtail extending from each brush and electrically connecting the brush and the power supply terminal,
The motor is characterized in that the pigtails extending from the brushes of the same polarity are routed on the opposite brush side of the base member and are collectively connected to the power supply terminals of the same polarity as the brushes Brush device. In the brush apparatus of the motor of Claim 1,
The motor brush device, wherein the pigtail and the power supply terminal are fastened and fixed to the base member by screws. The brush device for a motor according to claim 2,
The brush tail of the motor, wherein the pigtail and the power supply terminal are stacked and each have a screw insertion portion through which the screw is inserted in the stacking direction. In the brush apparatus of the motor of Claim 2 or 3,
The same pigtail and the feed terminal are fixed with one screw,
The motor brush device according to claim 1, wherein the base member is provided with a rotation prevention wall for preventing rotation of the power supply terminal around the screw.   The motor provided with the brush apparatus of any one of Claims 1-4.

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