JP2020129886A

JP2020129886A - Power supply structure of brush motor

Info

Publication number: JP2020129886A
Application number: JP2019021250A
Authority: JP
Inventors: 吉野　靖; Yasushi Yoshino; 靖吉野
Original assignee: T Rad Co Ltd
Current assignee: T Rad Co Ltd
Priority date: 2019-02-08
Filing date: 2019-02-08
Publication date: 2020-08-27

Abstract

To provide a power supply structure of a brush motor in which pigtails that have been conventionally used is omitted to make a power supply structure simple.SOLUTION: While providing a claw portion 6a so as to project on a substrate 1 side of a brush case 6, a claw hole 7 that matches it is formed on the substrate 1, and the claw portion 6a is bent toward a bus bar 5 side on a back surface 1b of the substrate 1 in a state of inserting the substrate 1 in the claw hole 7 to electrically connect the bus bar 5 and the claw portion 6.SELECTED DRAWING: Figure 3

Description

本発明は、ブラシモータの給電構造に関する。 The present invention relates to a brush motor power supply structure.

従来のブラシモータの給電構造は、図６に示す如く、基板１の表面１ａの中心に円孔３が形成され、そこにモータのセグメント（整流子）が挿入される。その円孔３の周りには複数のブラシ４が配置される。また基板１の裏面にはブスバー５が配置されている。そのブスバー５の一部は、表面１ａ側から裏面側に貫通する窓孔１７に露出され、ブスバー５の露出端１５とブラシ４とがピグテール１４を介して電気的に接続されている。
即ち、ピグテール１４の両端は、ブスバー５の露出端１５及びブラシ４にハンダ付されている。そして、ブスバー５から供給された電気が露出端１５，ピグテール１４，ブラシ４を介して、同図では図示しないセグメント（整流子）に供給され、その整流子を介して極性を変化させるものである。 As shown in FIG. 6, in the conventional brush motor power feeding structure, a circular hole 3 is formed at the center of the surface 1a of the substrate 1, and a motor segment (commutator) is inserted therein. A plurality of brushes 4 are arranged around the circular hole 3. A bus bar 5 is arranged on the back surface of the substrate 1. Part of the bus bar 5 is exposed in a window hole 17 penetrating from the front surface 1a side to the back surface side, and the exposed end 15 of the bus bar 5 and the brush 4 are electrically connected via the pigtail 14.
That is, both ends of the pigtail 14 are soldered to the exposed end 15 of the bus bar 5 and the brush 4. Then, electricity supplied from the bus bar 5 is supplied to a segment (commutator) not shown in the figure via the exposed end 15, the pigtail 14, and the brush 4, and the polarity is changed via the commutator. ..

特開２０１２−１３８９９４号公報JP2012-138994A

モータへの供給電力は、ブスバー５，ピグテール１４を介してブラシ４からセグメントに供給される。
このような給電構造は、ピグテール１４の両端をブスバー５の露出端１５及びブラシ４にハンダ付する手間が必要であり面倒であった。
また、ブラシ４が円孔３の中心側に出入するため、永年使用に基づき、ピグテール１４の付根部が損傷して、通電不能になる恐れがある。
さらには、ブラシ４を交換するたび毎にピグテール１４とブラシ４とを連結する必要があり、この点からも面倒であった。
そこで、本発明は係る問題点を解決することを課題とする。 Electric power supplied to the motor is supplied to the segment from the brush 4 via the bus bar 5 and the pigtail 14.
Such a power feeding structure is troublesome because it is necessary to solder both ends of the pigtail 14 to the exposed end 15 of the bus bar 5 and the brush 4.
Further, since the brush 4 moves in and out on the center side of the circular hole 3, there is a possibility that the root portion of the pigtail 14 may be damaged and the power may not be supplied due to long-term use.
In addition, it is necessary to connect the pigtail 14 and the brush 4 every time the brush 4 is replaced, which is also troublesome.
Then, this invention makes it a subject to solve the problem which concerns.

請求項１に記載の本発明は、基板１にモータのセグメント１３を挿通する円孔３が形成され、その基板１の表面１ａで、前記円孔３の回りに放射状に複数のブラシ４が配置され、基板１の裏面１ｂに給電用の平坦なブスバー５が配置されたブラシモータの給電構造において、
前記ブラシ４の外周に導電性のブラシケース６が被嵌され、ブラシケース６は基板１側に爪部６ａが突設され、その爪部６ａに整合する爪孔７が基板１に穿設され、
前記爪部６ａが前記爪孔７に挿通された状態で、基板１の裏面１ｂで、爪部６ａが前記ブスバー５側に折曲げられて、ブスバー５と爪部６ａとをカシメ部８により電気的に接続させると共に、そのカシメ部８によりブラシケース６を基板１に固定することを特徴とするブラシモータの給電構造である。 According to the present invention as set forth in claim 1, a circular hole 3 through which a motor segment 13 is inserted is formed in a substrate 1, and a plurality of brushes 4 are radially arranged around the circular hole 3 on a surface 1a of the substrate 1. In the brush motor power supply structure in which the flat bus bar 5 for power supply is arranged on the back surface 1b of the substrate 1,
A conductive brush case 6 is fitted on the outer circumference of the brush 4, a claw portion 6a is projectingly provided on the side of the substrate 1 of the brush case 6, and a claw hole 7 which is aligned with the claw portion 6a is formed in the substrate 1. ,
With the claw portion 6a inserted in the claw hole 7, the claw portion 6a is bent toward the bus bar 5 side on the back surface 1b of the substrate 1, and the bus bar 5 and the claw portion 6a are electrically connected by the caulking portion 8. The brush motor 6 is electrically connected and the brush case 6 is fixed to the substrate 1 by the caulking portion 8 thereof.

請求項２に記載の本発明は、前記ブスバー５が前記裏面１ｂに帯状に形成され、その帯幅に整合して一対の前記爪孔７および前記爪部６ａの間が形成された請求項１に記載のブラシモータの給電構造である。 The present invention according to claim 2 is characterized in that the bus bar 5 is formed in a strip shape on the back surface 1b, and a space between the pair of the claw holes 7 and the claw portion 6a is formed so as to match the band width. 2 is a power supply structure for the brush motor.

請求項１の本発明は、導電性のブラシケース６の爪部６ａを爪孔７に挿通して、基板１の裏面１ｂで、爪部６ａをブスバー５に折曲げて、そのカシメ部８でブラシケース６とブスバー５とを電気的に接続したものである。
そのため、極めて簡単な構造で、ブスバー５とブラシケース６とを電気的に接続すると同時に、ブラシケース６およびブラシ４を基板１に固定することができる。従来の給電構造のような、ピグテール、その両端の露出端１５及びブラシ４へのはんだ付けを不要とすることができる。 According to the first aspect of the present invention, the claw portion 6a of the conductive brush case 6 is inserted into the claw hole 7, the back surface 1b of the substrate 1 is bent, and the claw portion 6a is bent to the bus bar 5, and the caulking portion 8 is used. The brush case 6 and the bus bar 5 are electrically connected.
Therefore, with a very simple structure, the bus bar 5 and the brush case 6 can be electrically connected, and at the same time, the brush case 6 and the brush 4 can be fixed to the substrate 1. It is possible to eliminate the need for soldering to the pigtail, the exposed ends 15 at both ends thereof, and the brush 4 as in the conventional power feeding structure.

請求項２の本発明は、前記ブスバー５が裏面１ｂに帯状に形成され、その帯幅に整合して一対の前記爪孔７および爪部６ａを形成したものである。そのため、爪部６ａの折り曲げにより、ブスバー５とブラシケース６との電気的接続を確実に行える。 According to the second aspect of the present invention, the bus bar 5 is formed in a strip shape on the back surface 1b, and the pair of the claw holes 7 and the claw portions 6a are formed in conformity with the width of the strip. Therefore, by bending the claw portion 6a, the bus bar 5 and the brush case 6 can be reliably electrically connected.

本発明のブラシモータの給電構造の要部分解斜視図。The principal part exploded perspective view of the electric power feeding structure of the brush motor of this invention. 同組立て状態を示す要部斜視図であって、基板１の表面１ａ側から見たもの。FIG. 3 is a perspective view of a main part showing the assembled state, viewed from the front surface 1a side of the substrate 1. 同要部を示し、裏面１ｂから見た平面図。The top view which shows the same main part and was seen from the back surface 1b. 本発明の給電構造の横断面図であって、図５のＩＶ−ＩＶ矢視断面図。It is a cross-sectional view of the electric power feeding structure of this invention, Comprising: IV-IV arrow sectional drawing of FIG. 同構造の要部縦断面図。The principal part longitudinal cross-sectional view of the same structure. 従来型給電構造の要部斜視図（Ａ）、（Ａ）のＢ部拡大図（Ｂ）。The perspective view (A) of the principal part of a conventional type electric power feeding structure, and the B section enlarged view (B) of (A).

次に、図面に基づいて本発明の実施の形態につき説明する。
図１〜図５は、本発明の給電構造の要部を示し、図１はその基板１の表面１ａ側から見た要部分解斜視図、図２は同組立て状態を示す要部斜視図、図３は基板１の裏面１ｂ側から見た平面図であり、図４はその給電構造の要部横断面図であって、図５のＩＶ−ＩＶ矢視断面図、図５は同縦断面図である。
この給電構造は、図１及び図２に示す如く、円板状の基板１の中心に円孔３が形成されている。この円孔３は図５に示す如く、その内部に図示しないブラシモータの端部に突設されるセグメント１３（整流子）が挿通され、そのセグメント１３に複数のブラシ４を介して、給電されるものである。
その円孔３の回りには、左右一対ずつ設けられたガイド１１が、この例では放射方向に４つ配置され、それぞれにブラシケース６が着座される。各左右一対のガイド１１には、図１に示す如く、円孔３の近くに左右一対、円孔３から離れた位置に左右一対ずつの爪孔７が穿設されている。 Next, an embodiment of the present invention will be described with reference to the drawings.
1 to 5 show an essential part of a power feeding structure of the present invention, FIG. 1 is an exploded perspective view of an essential part seen from the surface 1a side of the substrate 1, and FIG. 2 is a perspective view of an essential part showing the assembled state, 3 is a plan view seen from the back surface 1b side of the substrate 1, FIG. 4 is a lateral cross-sectional view of a main part of the power feeding structure, a cross-sectional view taken along the line IV-IV in FIG. 5, and FIG. It is a figure.
In this power feeding structure, as shown in FIGS. 1 and 2, a circular hole 3 is formed at the center of a disk-shaped substrate 1. As shown in FIG. 5, the circular hole 3 has a segment 13 (commutator) projecting from the end portion of a brush motor (not shown) inserted therein, and power is supplied to the segment 13 through a plurality of brushes 4. It is something.
Around the circular hole 3, a pair of left and right guides 11 are arranged in the radial direction in this example, and a brush case 6 is seated on each of them. As shown in FIG. 1, each of the pair of left and right guides 11 is provided with a pair of left and right claw holes 7 near the circular hole 3 and a pair of left and right claw holes 7 at positions apart from the circular hole 3.

各ブラシケース６は導電性の金属板を箱状に折り曲げ、その天井部と一対の両側部及びその長手方向の一方（図１、図２、図５において、円孔３から離れる位置）の端部が折り曲げられている。各ブラシケース６には、スプリング１０を介してそれぞれブラシ４が内装される。
ブラシケース６の両側部には、前述の爪孔７に整合する位置に、爪部６ａが基板１側に突設されている。つまり、円孔３の近くの側部の位置に左右一対、円孔３から離れた側部の位置に左右一対ずつの爪部６ａが突設されている。その爪部６ａがガイド１１に隣接した爪孔７に挿入される。
次いで、その爪部６ａが折り曲げられて、各ブラシケース６は、第１ブスバー５ａ，第２ブスバー５ｂと電気的に接続される。
基板１の裏面１ｂ側には、図３に示す如く、第１ブスバー５ａと第２ブスバー５ｂとを有し、それらの端が端子１２に接続されている。第１ブスバー５ａ，第２ブスバー５ｂは薄い導電性の板材であり、それが裏面１ｂの平面に平行に貼着されている。
図３に示す如く、第１ブスバー５ａと第２ブスバー５ｂは環状に配置されており、この例では、第２ブスバー５ｂが円孔３に近い側に配置されており、第１ブスバー５ａが第２ブスバー５ｂと逆回りであり、第２ブスバー５ｂと距離をあけて外側に配置される。
そして、図３において、第１ブスバー５ａにブラシケース６の一方のカシメ部８が電気的に接続され、第２ブスバー５ｂにブラシケース６の一方のカシメ部８が電気的に接続されている。
なお、この例では、各ブスバー５ａ、５ｂは帯状に形成されており、その帯幅に整合するように、一対の爪孔７及び爪部６ａが形成されている。 Each brush case 6 is formed by bending a conductive metal plate into a box shape, and the end of the ceiling part and a pair of both side parts and one of its longitudinal directions (positions apart from the circular hole 3 in FIGS. 1, 2, and 5). The part is bent. The brushes 4 are installed in the brush cases 6 via springs 10.
On both sides of the brush case 6, claw portions 6a are provided so as to project toward the substrate 1 at positions aligned with the claw holes 7 described above. That is, a pair of left and right claws 6 a are provided so as to project at a side portion near the circular hole 3, and a pair of left and right claw portions 6 a are provided at a side portion apart from the circular hole 3. The claw portion 6a is inserted into the claw hole 7 adjacent to the guide 11.
Then, the claw portion 6a is bent, and each brush case 6 is electrically connected to the first bus bar 5a and the second bus bar 5b.
As shown in FIG. 3, the substrate 1 has a first bus bar 5 a and a second bus bar 5 b on the back surface 1 b side, and their ends are connected to the terminals 12. The first bus bar 5a and the second bus bar 5b are thin conductive plate materials, which are attached in parallel to the plane of the back surface 1b.
As shown in FIG. 3, the first bus bar 5a and the second bus bar 5b are annularly arranged. In this example, the second bus bar 5b is arranged on the side close to the circular hole 3, and the first bus bar 5a is the first bus bar 5a. It is opposite to the second busbar 5b and is arranged outside with a distance from the second busbar 5b.
In FIG. 3, one caulking portion 8 of the brush case 6 is electrically connected to the first bus bar 5a, and one caulking portion 8 of the brush case 6 is electrically connected to the second bus bar 5b.
In this example, each bus bar 5a, 5b is formed in a strip shape, and a pair of claw holes 7 and claw portions 6a are formed so as to match the band width.

また、図１において他方の爪部６ａは、図３に示す如く、その補助カシメ部９として、ブラシケース６を基板１の裏面１ｂにカシメ固定している。
即ち、図１においては、ブラシケース６の前側（円孔３の近くの側）の一対の爪部６ａが補助カシメ部９を構成し、後ろ側の一対の爪部６ａがカシメ部８を形成する。
補助カシメ部９は、ブラシケース６を基板１に固定する機能を有し、カシメ部８はブラシケース６と第１ブスバー５ａとを電気的に接続する機能を有する。つまり、ブラシケース６には、どちらかのブスバーと電気的に接続される爪部６ａと、どちらのブスバーにも接続されずに基板１に固定される爪部６ａとが形成される。このように、本発明は、ブラシケース６の各爪部６ａのカシメにより、各ブスバーとブラシ４との電気的接続を行うと共に、基板１とブラシケースとの固定を行う。
なお、一対のブスバー５ａ、５ｂの形状や配置は、図３の例に限定されるものではない。ブスバーとの接続条件を考慮し、ガイド１１及びブラシケース６の配置間隔、ブラシケース６の爪部６ａの間隔、爪部６ａの突出長さ等を変更することができる。 As shown in FIG. 3, the other claw portion 6a in FIG. 1 is used as an auxiliary caulking portion 9, and the brush case 6 is caulked and fixed to the back surface 1b of the substrate 1.
That is, in FIG. 1, the pair of claw portions 6a on the front side (the side near the circular hole 3) of the brush case 6 constitute the auxiliary caulking portion 9, and the pair of rear claw portions 6a form the caulking portion 8. To do.
The auxiliary caulking portion 9 has a function of fixing the brush case 6 to the substrate 1, and the caulking portion 8 has a function of electrically connecting the brush case 6 and the first bus bar 5a. That is, the brush case 6 is formed with the claw portion 6a electrically connected to either bus bar and the claw portion 6a fixed to the substrate 1 without being connected to either bus bar. As described above, according to the present invention, by caulking the claw portions 6a of the brush case 6, the bus bars and the brush 4 are electrically connected and the substrate 1 and the brush case are fixed.
The shape and arrangement of the pair of bus bars 5a and 5b are not limited to the example of FIG. The arrangement interval between the guide 11 and the brush case 6, the interval between the claw portions 6a of the brush case 6, the protruding length of the claw portions 6a, and the like can be changed in consideration of the connection condition with the bus bar.

１基板
１ａ表面
１ｂ裏面
３円孔
４ブラシ
５ブスバー
５ａ第１ブスバー
５ｂ第２ブスバー
６ブラシケース
６ａ爪部 1 substrate 1a front surface 1b back surface 3 circular hole 4 brush 5 bus bar 5a first bus bar 5b second bus bar 6 brush case 6a claw

７爪孔
８カシメ部
９補助カシメ部
１０スプリング
１１ガイド
１２端子
１３セグメント
１４ピグテール
１５露出端
１７窓孔 7 Claw Hole 8 Caulking Part 9 Auxiliary Caulking Part 10 Spring 11 Guide 12 Terminal 13 Segment 14 Pigtail 15 Exposed End 17 Window Hole

Claims

A circular hole (3) for inserting the motor segment (13) is formed in the substrate (1), and a plurality of brushes (radial around the circular hole (3) are radially formed on the surface (1a) of the substrate (1). 4) is arranged and a flat bus bar (5) for feeding is arranged on the back surface (1b) of the substrate (1),
A conductive brush case (6) is fitted on the outer circumference of the brush (4), and the brush case (6) has a claw portion (6a) protruding from the substrate (1) side, and the claw portion (6a) is provided on the claw portion (6a). A matching claw hole (7) is drilled in the substrate (1),
With the claw portion (6a) inserted into the claw hole (7), the claw portion (6a) is bent toward the bus bar (5) on the back surface (1b) of the substrate (1), A brush characterized in that the (5) and the claw portion (6a) are electrically connected by the crimping portion (8), and the brush case (6) is fixed to the substrate (1) by the crimping portion (8). Motor power supply structure.

The bus bar (5) is formed in a strip shape on the back surface (1b), and a pair of the claw hole (7) and the claw portion (6a) are formed to match the band width. Brush motor power supply structure.