JPH023382B2 - - Google Patents
Info
- Publication number
- JPH023382B2 JPH023382B2 JP2303182A JP2303182A JPH023382B2 JP H023382 B2 JPH023382 B2 JP H023382B2 JP 2303182 A JP2303182 A JP 2303182A JP 2303182 A JP2303182 A JP 2303182A JP H023382 B2 JPH023382 B2 JP H023382B2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- brush
- torsion coil
- bracket
- coil spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000003466 welding Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/145—Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Current Collectors (AREA)
Description
【発明の詳細な説明】
本発明は小型モータの刷子構造、さらに詳しく
は整流子を備えた小型直流モータに用いる刷子の
保持構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brush structure for a small motor, and more particularly to a brush holding structure used in a small DC motor equipped with a commutator.
従来、この種の小型モータの刷子は、第1図に
示すように、刷子6を保持する保持ばね7として
板ばねが用いられ、この保持ばね7の一端部に端
子板33が溶接されていた。したがつて、保持ば
ね7のばね定数が大きくなり、回転トルクの小さ
な小型直流モータに適するばね定数とするために
は保持ばね7を巾方向において複数に分割する必
要があつた。このような加工は小型になるほど困
難を伴い、加工精度が低くなりがちであり、刷子
6を整流子8に安定して接触させることができな
いという欠点があつた。一方、ばね定数を小さく
するために保持ばね7の板厚を小さくすると、端
子板33との溶接が困難になるものであつた。ま
た保持ばね7を定位置に固定するために、端子板
33に設けた爪34をブラケツト3の端子孔10
に圧入していたが、保持ばね7と端子板33との
溶接強度や溶接位置の精度、あるいは圧入の位置
精度や圧入の保持力により刷子6の整流子8への
接触位置及び刷子6の接触圧などが影響を受け易
く、歩どまりが悪いものであり、寿命も短いとい
う欠点があつた。 Conventionally, in this type of small motor brush, a leaf spring was used as a holding spring 7 for holding the brush 6, and a terminal plate 33 was welded to one end of this holding spring 7, as shown in FIG. . Therefore, the spring constant of the holding spring 7 becomes large, and in order to make the spring constant suitable for a small DC motor with a small rotational torque, it is necessary to divide the holding spring 7 into a plurality of pieces in the width direction. Such machining becomes more difficult as the size becomes smaller, and the machining accuracy tends to be lower, which has the disadvantage that the brush 6 cannot be brought into stable contact with the commutator 8. On the other hand, if the thickness of the retaining spring 7 is reduced in order to reduce the spring constant, welding to the terminal plate 33 becomes difficult. In addition, in order to fix the retaining spring 7 in a fixed position, a claw 34 provided on the terminal plate 33 is inserted into the terminal hole 10 of the bracket 3.
However, the contact position of the brush 6 to the commutator 8 and the contact position of the brush 6 may vary depending on the welding strength between the holding spring 7 and the terminal plate 33, the accuracy of the welding position, the positional accuracy of the press-fit, and the holding force of the press-fit. The drawbacks were that pressure was easily affected, the yield was poor, and the lifespan was short.
本発明は上述のような従来の欠点を解消すべく
為されたものであつて、主な目的をするところ
は、保持ばねと端子とを一体化して溶接箇所をな
くし、溶接による加工の困難さを除くことにあ
り、他の目的とするところは、刷子の組み込み時
に刷子を整流子から離間した位置に保持し、組み
立て後に所定の接触力で刷子が整流子に接触する
ようにして組み立て作業を容易にすることにあ
る。 The present invention has been made to solve the above-mentioned conventional drawbacks, and its main purpose is to integrate the retaining spring and the terminal to eliminate welding points, thereby reducing the difficulty of processing by welding. Another purpose is to hold the brush in a position separated from the commutator when the brush is assembled, and to make the brush contact the commutator with a predetermined contact force after assembly, so that the assembly work can be carried out. It's about making it easier.
以下、本発明の実施例を図面に基づいて説明す
る。本発明に係る小型モータの刷子構造は、ロー
タ1の軸方向におけるケーシング2の一端にブラ
ケツト3が取着され、ブラケツト3の内面に支持
柱4が突設され、支持柱4外周にはねじりコイル
ばね5が挿着され、ねじりコイルばね5の一端か
らは先端部に刷子6を有する保持ばね7が延出
し、ねじりコイルばね5のばね力により刷子6が
整流子8に当接する向きに付勢され、ねじりコイ
ルばね5の他端から延出する端子線9がブラケツ
ト3に形成された端子孔10を通つてケーシング
2外に突出し、刷子6が整流子8と離間した位置
で保持ばね7をねじりコイルばね5のばね力に抗
して係止する仮止めピン31がブラケツト3の内
面に突設され、仮止めピン31に係止された保持
ばね7に対応する位置には保持ばね7と仮止めピ
ン31との係止を解除する治具が挿入される透孔
32が形成されたことを特徴とするものである。
本実施例ではカツプ型コアレスモータを例示す
る。第2図に示すように、ケーシング2は有底筒
状のフレーム12とフレーム12の開口端を閉塞
するブラケツト3とで形成され、フレーム12内
に円筒状のロータコイル13を備えたロータ1
と、ロータ1の内側に配設される磁石片14を備
えたステータ15とが配置される。磁石片14は
フレーム12に固定されたヨーク16に保持さ
れ、ヨーク16の中央には回転軸17が挿通され
る軸孔18が形成される。軸孔18の周面でヨー
ク16の両端部には軸受19が装着される。ロー
タコイル13はブラケツト3側の一端部で円盤状
の基台20の外周に固着され、基台20の中央に
は回転軸17が挿通固定される。基台20の一面
にはリング状に形成されたサージ吸収用のバリス
タ21が固着され、バリスタ21の表面に設けら
れた電極とロータコイル13の端子と整流子8と
が半田固定される。整流子8はロータコイル13
に半田固定されるライザ22から刷子6に摺接す
るセグメント23が立ち上がる略L字形に成形さ
れ、セグメント23は回転軸17に挿着される整
流子基台24に固定されている。ブラケツト3に
は整流子8に接触する刷子6に接触圧を付与する
ためのねじりコイルばね5が取着される。すなわ
ち第3図に示すように、ブラケツト3内面には円
柱状の支持柱4が突設され、支持柱4の外周には
ねじりコイルばね5が挿着され、ねじりコイルば
ね5における支持柱4の先端側の一端からは直線
状の保持ばね7が延出し、ねじりコイルばね5の
支持柱4の基部側の一端からは端子線9が延出す
る。ねじりコイルばね5の一端から周方向に沿つ
て延出する保持ばね7の先端部にはカーボンで形
成された刷子6が固定される。またねじりコイル
ばね5の他端から延出する端子線9はブラケツト
3に形成された内外に貫通する端子孔10を通つ
てケーシング2外に突出する。ところで端子孔1
0は、第3図に示すようにブラケツト3の半径方
向に沿つて長い長孔に形成され、端子孔10の外
側縁からはブラケツト3の内面にL字状の係止片
30が突出する。しかるに、ねじりコイルばね5
の一端から延出する端子線9をL字状に曲げて端
子孔10を通し、端子線9の屈曲部分を係止片3
0に当接させることにより、ねじりコイルばね5
が支持柱4の軸方向に抜けることを防止し、且つ
端子線9のぐらつきを防止している。ねじりコイ
ルばね5は刷子6を整流子8に向かつて付勢する
ばね力を有し、このばね力が作用するときには端
子線9は係止片30に圧接する。ブラケツト3内
面には第3図、第4図に示すように、刷子6が整
流子8と離間した位置で保持ばね7をねじりコイ
ルばね5のばね力に抗して係止する仮止めピン3
1が突設される。仮止めピン31に係止された保
持ばね7に対応してブラケツト3には内外に貫通
する透孔32が形成される。したがつて、保持ば
ね7先端部を仮止めピン31に係止するとフレー
ム12にブラケツト3を装着する際に刷子6が整
流子8に当たらないようにするのが容易となる。
ケーシング2の組み立て後、刷子6を整流子8に
接触させるには透孔32からピンなどの治具を挿
入して保持ばね7を押せば、仮止めピン31と保
持ばね7との係止が解除されるのである。ここで
刷子6の整流子に対する接触圧はねじりコイルば
ね5によつて得ているので、仮止めピン31に保
持ばね7を長時間係止しておいてもばね力が弱ま
ることがないものである。 Embodiments of the present invention will be described below based on the drawings. The brush structure of a small motor according to the present invention has a bracket 3 attached to one end of a casing 2 in the axial direction of a rotor 1, a support column 4 protruding from the inner surface of the bracket 3, and a torsion coil on the outer periphery of the support column 4. A spring 5 is inserted, and a holding spring 7 having a brush 6 at its tip extends from one end of the torsion coil spring 5, and the spring force of the torsion coil spring 5 urges the brush 6 in the direction of contacting the commutator 8. The terminal wire 9 extending from the other end of the torsion coil spring 5 projects outside the casing 2 through the terminal hole 10 formed in the bracket 3, and the holding spring 7 is held at a position where the brush 6 is separated from the commutator 8. A temporary fixing pin 31 that locks against the spring force of the torsion coil spring 5 is protruded from the inner surface of the bracket 3, and a holding spring 7 is provided at a position corresponding to the holding spring 7 that is locked to the temporary fixing pin 31. It is characterized in that a through hole 32 is formed into which a jig for releasing the lock with the temporary fixing pin 31 is inserted.
In this embodiment, a cup-type coreless motor is exemplified. As shown in FIG. 2, the casing 2 is formed of a cylindrical frame 12 with a bottom and a bracket 3 that closes the open end of the frame 12.
and a stator 15 having magnet pieces 14 disposed inside the rotor 1. The magnet piece 14 is held by a yoke 16 fixed to the frame 12, and a shaft hole 18 is formed in the center of the yoke 16, into which a rotating shaft 17 is inserted. Bearings 19 are mounted on both ends of the yoke 16 on the circumferential surface of the shaft hole 18 . One end of the rotor coil 13 on the side of the bracket 3 is fixed to the outer periphery of a disc-shaped base 20, and a rotating shaft 17 is inserted and fixed in the center of the base 20. A ring-shaped surge absorbing varistor 21 is fixed to one surface of the base 20, and electrodes provided on the surface of the varistor 21, terminals of the rotor coil 13, and the commutator 8 are fixed by soldering. Commutator 8 is rotor coil 13
The brush 6 is formed into a substantially L-shape in which a segment 23 that slides into contact with the brush 6 rises from a riser 22 that is soldered to the riser 22 , and the segment 23 is fixed to a commutator base 24 that is inserted into the rotating shaft 17 . A torsion coil spring 5 is attached to the bracket 3 for applying contact pressure to the brush 6 in contact with the commutator 8. That is, as shown in FIG. 3, a cylindrical support column 4 is provided protruding from the inner surface of the bracket 3, and a torsion coil spring 5 is inserted into the outer periphery of the support column 4. A linear retaining spring 7 extends from one end on the tip side, and a terminal wire 9 extends from one end on the base side of the support column 4 of the torsion coil spring 5. A brush 6 made of carbon is fixed to the tip of a retaining spring 7 extending along the circumferential direction from one end of the torsion coil spring 5. Further, a terminal wire 9 extending from the other end of the torsion coil spring 5 projects to the outside of the casing 2 through a terminal hole 10 formed in the bracket 3 and penetrating inside and outside. By the way, terminal hole 1
0 is formed as a long hole extending in the radial direction of the bracket 3, as shown in FIG. However, the torsion coil spring 5
The terminal wire 9 extending from one end is bent into an L shape, passed through the terminal hole 10, and the bent portion of the terminal wire 9 is inserted into the locking piece 3.
0, the torsion coil spring 5
This prevents the terminal wire 9 from coming off in the axial direction of the support column 4, and also prevents the terminal wire 9 from wobbling. The torsion coil spring 5 has a spring force that urges the brush 6 toward the commutator 8, and when this spring force acts, the terminal wire 9 comes into pressure contact with the locking piece 30. As shown in FIGS. 3 and 4, on the inner surface of the bracket 3, there is a temporary fixing pin 3 that locks the retaining spring 7 against the spring force of the torsion coil spring 5 at a position where the brush 6 is separated from the commutator 8.
1 is provided protrudingly. A through hole 32 is formed in the bracket 3 to correspond to the retaining spring 7 which is engaged with the temporary fixing pin 31 and penetrates from the inside to the outside. Therefore, by locking the tip of the retaining spring 7 to the temporary fixing pin 31, it becomes easy to prevent the brush 6 from hitting the commutator 8 when the bracket 3 is attached to the frame 12.
After assembling the casing 2, in order to bring the brush 6 into contact with the commutator 8, a jig such as a pin is inserted through the through hole 32 and the holding spring 7 is pushed, thereby locking the temporary fixing pin 31 and the holding spring 7. It will be lifted. Here, since the contact pressure of the brush 6 against the commutator is obtained by the torsion coil spring 5, the spring force will not weaken even if the retaining spring 7 is retained on the temporary fixing pin 31 for a long time. be.
本発明は上述のように、ブラケツトの内面に支
持柱を突設してねじりコイルばねを支持柱の外周
に挿着し、ねじりコイルばねの一端からは先端部
に刷子を有する保持ばねが延出し、ねじりコイル
ばねの他端からは端子線が延出するので、刷子を
整流子に接触させるための保持ばねと端子線とが
一体となり、従来のように保持ばねと端子線とを
溶接する必要がなく、部品点数が少なくなると共
に、部品の精度が向上するという利点を有し、刷
子をねじりコイルばねのばね力で整流子に圧接さ
せているので、刷子の整流子への接触が安定する
という利点を有している。また本発明は刷子が整
流子と離間した位置で保持ばねをねじりコイルば
ねのばね力に抗して係止する仮止めピンがブラケ
ツトの内面に突設され、保持ばねと仮止めピンと
の係止を解除する治具が挿入れる透孔が形成され
るので、組み立て時には仮止めピンに保持ばねを
係止しておけば、保持ばねを手で広げて刷子を整
流子から離しておく必要がなく、単にケーシング
のフレームとブラケツトとを嵌合するだけでよ
く、その後透孔からピンのような治具を用いて仮
止めピンと保持ばねとの係止を解除すればよく、
この結果組み立て作業が容易になるものである。
またねじりコイルばねで刷子を整流子に向かつて
付勢するので、保持ばねを長時間仮止めピンに係
止してもばね力が弱まることがなく刷子を整流子
に安定した圧力で接触させることができるもので
ある。さらに本発明にあつては、ねじりコイルば
ねの一端に取着された刷子を整流子に当接させて
あるから、刷子と整流子との接触面積がねじりコ
イルばねの径により制限されず、整流子と刷子と
の間での接触抵抗を小さくでき、しかも両者の接
触も安定するという利点がある。さらにまた本発
明はねじりコイルばねの他端から延出する端子線
がブラケツトに形成された端子孔を通つてケーシ
ング外に突出しているから、端子線を端子孔に通
すことにより刷子をブラケツトに取り付けるとき
の位置合わせをでき、また刷子を確実に固定で
き、さらにねじりコイルばねの他端がケーシング
外に突出して端子線となつているので端子側にお
ける接触抵抗も少なく、接触抵抗が小さいので発
熱も少ないという効果がある。 As described above, the present invention includes a support column protruding from the inner surface of the bracket, a torsion coil spring inserted into the outer periphery of the support column, and a retaining spring having a brush at the tip extending from one end of the torsion coil spring. Since the terminal wire extends from the other end of the torsion coil spring, the retaining spring and the terminal wire are integrated to bring the brush into contact with the commutator, and there is no need to weld the retaining spring and the terminal wire as in the conventional method. This has the advantage of reducing the number of parts and improving the precision of the parts, and since the brush is pressed against the commutator by the spring force of the torsion coil spring, the contact between the brush and the commutator is stable. It has the advantage of Further, in the present invention, a temporary fixing pin that locks the holding spring against the spring force of the torsion coil spring at a position where the brush is separated from the commutator is provided protruding from the inner surface of the bracket, and the holding spring and the temporary fixing pin are locked. A through hole is formed into which a jig to release the brush is inserted, so if you lock the retaining spring to the temporary fixing pin during assembly, there is no need to spread the retaining spring by hand to separate the brush from the commutator. , it is sufficient to simply fit the frame of the casing and the bracket, and then use a jig such as a pin through the through hole to release the temporary fixing pin from the retaining spring.
As a result, assembly work becomes easier.
In addition, since the brush is urged toward the commutator by a torsion coil spring, the spring force does not weaken even if the retaining spring is locked to the temporary fixing pin for a long time, and the brush can be brought into contact with the commutator with stable pressure. It is something that can be done. Furthermore, in the present invention, since the brush attached to one end of the torsion coil spring is brought into contact with the commutator, the contact area between the brush and the commutator is not limited by the diameter of the torsion coil spring, and the commutator is This has the advantage that the contact resistance between the child and the brush can be reduced, and the contact between the two is also stable. Furthermore, in the present invention, since the terminal wire extending from the other end of the torsion coil spring projects outside the casing through the terminal hole formed in the bracket, the brush can be attached to the bracket by passing the terminal wire through the terminal hole. In addition, since the other end of the torsion coil spring protrudes outside the casing and becomes the terminal wire, there is little contact resistance on the terminal side, and because the contact resistance is low, there is no heat generation. It has the effect of being small.
第1図は従来例を示す斜視図、第2図は本発明
を利用した小型モータの一例を示す断面図、第3
図は本発明の要部の斜視図、第4図は同上の動作
説明図であり、1はロータ、2はケーシング、3
はブラケツト、4は支持柱、5はねじりコイルば
ね、6は刷子、7は保持ばね、8は整流子、9は
端子線、10は端子孔、31は仮止めピン、32
は透孔である。
FIG. 1 is a perspective view showing a conventional example, FIG. 2 is a sectional view showing an example of a small motor using the present invention, and FIG.
The figure is a perspective view of the main part of the present invention, and FIG.
is a bracket, 4 is a support column, 5 is a torsion coil spring, 6 is a brush, 7 is a holding spring, 8 is a commutator, 9 is a terminal wire, 10 is a terminal hole, 31 is a temporary fixing pin, 32
is a through hole.
Claims (1)
ブラケツトが取着され、ブラケツトの内面に支持
柱が突設され、支持柱外周にはねじりコイルばね
が挿着され、ねじりコイルばねの一端からは先端
部に刷子を有する保持ばねが延出し、ねじりコイ
ルばねのばね力により刷子が整流子に当接する向
きに付勢され、ねじりコイルばねの他端から延出
する端子線がブラケツトの形成された端子孔を通
つてケーシング外に突出し、刷子が整流子と離間
した位置で保持ばねをねじりコイルばねのばね力
に抗して係止する仮止めピンがブラケツトの内面
に突設され、仮止めピンに係止された保持ばねに
対応する位置には保持ばねと仮止めピンとの係止
を解除する治具が挿入される透孔が形成されたこ
とを特徴とする小型モータの刷子構造。1 A bracket is attached to one end of the casing in the axial direction of the rotor, a support column is provided protruding from the inner surface of the bracket, a torsion coil spring is inserted into the outer periphery of the support column, and a torsion coil spring is inserted from one end of the torsion coil spring to the tip. A retaining spring having a brush extends, and the spring force of the torsion coil spring urges the brush in a direction to abut the commutator, and the terminal wire extending from the other end of the torsion coil spring connects to the terminal hole in which the bracket is formed. A temporary fixing pin that protrudes outside the casing through the bracket and locks the retaining spring against the spring force of the torsion coil spring at a position where the brush is separated from the commutator is provided on the inner surface of the bracket and is locked to the temporary fixing pin. A brush structure for a small motor, characterized in that a through hole into which a jig for releasing the lock between the holding spring and the temporary fixing pin is inserted is formed at a position corresponding to the held holding spring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2303182A JPS58141644A (en) | 1982-02-15 | 1982-02-15 | Brush structure for small-sized motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2303182A JPS58141644A (en) | 1982-02-15 | 1982-02-15 | Brush structure for small-sized motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58141644A JPS58141644A (en) | 1983-08-23 |
JPH023382B2 true JPH023382B2 (en) | 1990-01-23 |
Family
ID=12099098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2303182A Granted JPS58141644A (en) | 1982-02-15 | 1982-02-15 | Brush structure for small-sized motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58141644A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6077793B2 (en) * | 2012-08-29 | 2017-02-08 | 株式会社ミツバ | Electric motor |
JP2014050221A (en) * | 2012-08-31 | 2014-03-17 | Aupack Co Ltd | Brush device and brush structure |
JP7255976B2 (en) * | 2018-05-22 | 2023-04-11 | ミネベアミツミ株式会社 | motor |
-
1982
- 1982-02-15 JP JP2303182A patent/JPS58141644A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58141644A (en) | 1983-08-23 |
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