JPH0297861U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る周波数発電機をそなえた
小型モータの周波数発電機部分の一実施例断面図
、第２図は第１図のＡ―Ａ矢視図、第３図はＦＧ
マグネツト取付分解説明図、第４図は小ケース板
組立図、第５図は従来の周波数発電機をそなえた
小型モータの断面図、第６図は第５図の周波数発
電機部分の配置説明図を示している。 図中、１は小ケース板、２はブラシ保持部、３
はブラシ装置、４，５は軸受、６はモータ軸、７
はコミテータ、８は回転子、８―１は回転子コア
、８―２は回転子巻線、９はモータハウジング、
１０は永久磁石、１１はノイズ消去用素子、２０
はＦＧ回転子、２１はＦＧ固定子、２１―１は内
歯車状コア、２１―２はＦＧマグネツト、２１―
３は検出コイル、２２はモータ・ターミナル、２
３は窪み、２４はボス、２５はボス穴を表わして
いる。 Fig. 1 is a sectional view of an embodiment of the frequency generator portion of a small motor equipped with a frequency generator according to the present invention, Fig. 2 is a view taken along arrow A-A in Fig. 1, and Fig. 3 is an FG-G line.
Magnet installation exploded explanatory diagram; Figure 4 is an assembly diagram of the small case plate; Figure 5 is a sectional view of a small motor equipped with a conventional frequency generator; Figure 6 is an explanatory diagram of the arrangement of the frequency generator part in Figure 5. It shows. In the figure, 1 is a small case plate, 2 is a brush holding part, 3
is a brush device, 4 and 5 are bearings, 6 is a motor shaft, and 7
is a commutator, 8 is a rotor, 8-1 is a rotor core, 8-2 is a rotor winding, 9 is a motor housing,
10 is a permanent magnet, 11 is a noise canceling element, 20
is the FG rotor, 21 is the FG stator, 21-1 is the internal gear-shaped core, 21-2 is the FG magnet, 21-
3 is a detection coil, 22 is a motor terminal, 2
3 represents a recess, 24 represents a boss, and 25 represents a boss hole.

Claims (1)

【実用新案登録請求の範囲】 界磁形成用の永久磁石を有する固定子と回転子
コアに回転子巻線が巻回されてなる回転子とを備
え、給電用のブラシと摺動するコミテータを介し
て上記回転子巻線に電流を供給するように構成さ
れた小型モータと、該小型モータの回転数を検出
するために上記回転子に装着されかつ外周に複数
個の磁極歯を備えた軟磁性体よりなるロータと、
モータハウジングに接しかつ上記ロータの板面と
相対向するように配置された内周に複数個の磁極
歯を備えた軟磁性体よりなるステータと、上記ロ
ータの磁極歯とステータの磁極歯との間に磁界を
形成する永久磁石と、上記ロータとステータとの
夫々の磁極歯との間の磁界の変化を受けロータの
回転数に比例した誘起電圧を発生させる周波数検
出用コイルとを備えてなる周波数発電機とを備え
、当該周波数発電機が上記小型モータに内蔵され
た構造の小型モータにおいて、 上記ブラシの一端側が埋設固着されてなるブラ
シ保持部に、周波数発電機の永久磁石を嵌入する
ための窪みを形成すると共に、端面にカシメ用の
ボスを設け、 上記ブラシ保持部の端面に設けられたカシメ用
のボスが嵌挿されるボス穴を上記ロータの軸受を
保持する小ケース板に穿設し、 該小ケース板に穿設されたボス穴に、上記ブラ
シ保持部の端面に設けられたカシメ用のボスを嵌
挿し、該ボスをカシメることにより周波数発電機
の永久磁石を固定するようにしたことを特徴とす
る周波数発電機をそなえた小型モータ。[Claims for Utility Model Registration] A stator having a permanent magnet for forming a field, a rotor having a rotor winding wound around a rotor core, and a commutator that slides with brushes for power supply. a small motor configured to supply current to the rotor windings through the motor; and a soft motor that is attached to the rotor and has a plurality of magnetic pole teeth on its outer periphery in order to detect the rotation speed of the small motor. A rotor made of magnetic material,
a stator made of a soft magnetic material having a plurality of magnetic pole teeth on its inner periphery and arranged in contact with the motor housing and facing the plate surface of the rotor; A permanent magnet that forms a magnetic field therebetween, and a frequency detection coil that generates an induced voltage proportional to the number of rotations of the rotor in response to changes in the magnetic field between the respective magnetic pole teeth of the rotor and stator. In a small motor having a structure in which the frequency generator is built into the small motor, the permanent magnet of the frequency generator is fitted into a brush holding part in which one end of the brush is embedded and fixed. and a boss for caulking is provided on the end face, and a boss hole is bored in the small case plate that holds the bearing of the rotor, into which the boss for caulking provided on the end face of the brush holding part is inserted. Then, the caulking boss provided on the end face of the brush holding portion is inserted into the boss hole drilled in the small case plate, and the permanent magnet of the frequency generator is fixed by caulking the boss. A small motor equipped with a frequency generator.