JPH10257720A - Method for mounting encoder - Google Patents

Method for mounting encoder

Info

Publication number
JPH10257720A
JPH10257720A JP9074518A JP7451897A JPH10257720A JP H10257720 A JPH10257720 A JP H10257720A JP 9074518 A JP9074518 A JP 9074518A JP 7451897 A JP7451897 A JP 7451897A JP H10257720 A JPH10257720 A JP H10257720A
Authority
JP
Japan
Prior art keywords
encoder
electric motor
hole
bracket
magnetic drum
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.)
Pending
Application number
JP9074518A
Other languages
Japanese (ja)
Inventor
Hidenori Matsuura
英典 松浦
Hiroyuki Fujita
博之 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP9074518A priority Critical patent/JPH10257720A/en
Publication of JPH10257720A publication Critical patent/JPH10257720A/en
Pending legal-status Critical Current

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  • Motor Or Generator Frames (AREA)

Abstract

PROBLEM TO BE SOLVED: To realize simple and easy work in mounting and exchanging an encoder. SOLUTION: When an encoder 8 is mounted, a magnetic drum 9 is fixed at an axial edge of a rotating axle 4 of a motor 1. A housing 10b for the encoder 8 is mounted on a bracket 5. The magnetic drum 9 at the axial edge of the rotating axle 4 has a hole 9a on a diagonal line thereof, while a board 10 mounted on the bracket 5 has a hole 10a in a diagonal line thereof. After the hole 9a of the magnet drum 9 and the hole 10a of the board 10 are aligned, the magnetic drum 9 is mounted on the rotating axle 4, and the housing 10b, on which the board 10 is mounted, is mounted on the bracket 5. As a result, work in mounting the encoder 8 on the motor 1 is made simple and easy.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【発明の属する技術分野】本発明は、電動機の回転軸に
エンコーダを取付けるエンコーダの取付け方法に関する
ものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting an encoder on a rotary shaft of a motor.

【0002】[0002]

【従来の技術】電動機を用いた制御では、制御量を精密
に検出するため、制御時における電動機の磁極位置等を
正確に検出する必要がある。このため、電動機の回転軸
の軸端に回転角を検出する磁気式のエンコーダを取付け
ている。図4は電動機にエンコーダを取付けた状態を示
す斜視図である。図において、20は電動機で、フレー
ム21の端面にブラケット22が固定されている。23
は回転軸、24はエンコーダで、このエンコーダ24の
ホローシャフト25を前記電動機20の回転軸23に連
結して固定している。前記ホローシャフト25は中空に
形成し、円周方向に所定のピッチで交互に異極に着磁し
た磁気ドラム26が取付けられている。27はエンコー
ダ24のハウジング28に固定した取付用板バネで、こ
の取付用板バネ27をブラケット22の検出器取付座2
2aに取付けて、エンコーダ24を電動機20のブラケ
ット22に固定している。28はエンコーダ24のハウ
ジングで、このエンコーダ24のハウジング28に磁気
抵抗素子などの検出素子(図示せず)が取付けられてい
る。29は波形整形回路を搭載した基板で、ハウジング
28に取付けてある。つぎに、電動機20にエンコーダ
24を取付ける取付け方法について説明をする。まず、
エンコーダ24の取付用板バネ27をブラケット22の
取付座22aに取付ける。つぎに、電動機20およびエ
ンコーダ24の波形を図示しないオシロスコープで見な
がら電動機20の誘起起電力波形の零点とエンコーダの
出力波形の変化点が一致するように電動機20の回転軸
23を回転する。前記電動機20の誘起起電力波形の零
点とエンコーダの出力波形の変化点が一致すると、電動
機20の回転軸23に嵌め込んだホローシャフト25の
外周に取付けたセットカラー30を締め付けて電動機2
0の回転軸23にホローシャフト25を固定して電動機
20にエンコーダ24を取付ける。
2. Description of the Related Art In control using a motor, it is necessary to accurately detect a magnetic pole position and the like of the motor during control in order to accurately detect a control amount. For this reason, a magnetic encoder for detecting the rotation angle is attached to the end of the rotating shaft of the electric motor. FIG. 4 is a perspective view showing a state where an encoder is attached to the electric motor. In the figure, reference numeral 20 denotes an electric motor, and a bracket 22 is fixed to an end surface of a frame 21. 23
Is a rotary shaft, and 24 is an encoder. The hollow shaft 25 of the encoder 24 is connected to and fixed to the rotary shaft 23 of the electric motor 20. The hollow shaft 25 is formed in a hollow shape, and has a magnetic drum 26 which is alternately magnetized to a different polarity at a predetermined pitch in a circumferential direction. Reference numeral 27 denotes a mounting leaf spring fixed to a housing 28 of the encoder 24. The mounting leaf spring 27 is attached to the detector mounting seat 2 of the bracket 22.
2a, the encoder 24 is fixed to the bracket 22 of the electric motor 20. Reference numeral 28 denotes a housing of the encoder 24, and a detection element (not shown) such as a magnetic resistance element is attached to the housing 28 of the encoder 24. Reference numeral 29 denotes a board on which a waveform shaping circuit is mounted, which is attached to the housing 28. Next, a method of attaching the encoder 24 to the electric motor 20 will be described. First,
The mounting leaf spring 27 of the encoder 24 is mounted on the mounting seat 22 a of the bracket 22. Next, while observing the waveforms of the electric motor 20 and the encoder 24 with an oscilloscope (not shown), the rotating shaft 23 of the electric motor 20 is rotated so that the zero point of the induced electromotive force waveform of the electric motor 20 and the change point of the output waveform of the encoder coincide. When the zero point of the induced electromotive force waveform of the electric motor 20 matches the change point of the output waveform of the encoder, the set collar 30 attached to the outer periphery of the hollow shaft 25 fitted on the rotating shaft 23 of the electric motor 20 is tightened so that the electric motor 2
The hollow shaft 25 is fixed to the 0 rotation shaft 23, and the encoder 24 is attached to the electric motor 20.

【0003】[0003]

【発明が解決しようとする課題】ところが、従来のエン
コーダの取付け方法は、電動機20の誘起起電力波形の
零点とエンコーダ24の出力波形の変化点との一致する
ところをオシロスコープで見ながら調整して取付けてお
り、取付け作業に時間がかかっていた。また、エンコー
ダ24を交換するときは、測定用のオシロスコープが必
要となり交換作業が煩雑となっていた。本発明は、電動
機にエンコーダを取付ける取付け作業を簡単にし、エン
コーダの交換作業を簡単に行うことができるようにす
る。
However, according to the conventional encoder mounting method, a point where the zero point of the induced electromotive force waveform of the electric motor 20 coincides with the change point of the output waveform of the encoder 24 is adjusted while observing with an oscilloscope. It was attached and it took time to attach. Further, when replacing the encoder 24, an oscilloscope for measurement is required, and the replacement operation is complicated. The present invention simplifies the work of attaching an encoder to an electric motor, and allows the encoder to be easily replaced.

【0004】[0004]

【課題を解決するための手段】上記問題点を解決するた
めに、本発明は、電動機の回転軸の軸端にエンコーダの
磁気ドラムを固定し、前記エンコーダのハウジングを電
動機のブラケットに取付けるエンコーダの取付け方法に
おいて、前記回転軸の軸端に取付け、対角線上に設けた
穴を有するエンコーダの磁気ドラムと、前記ブラケット
に取付け、対角線上に穴を有する基板とを設け、前記磁
気ドラムの穴と基板の穴とを合致させて、磁気ドラムを
回転軸に、基板を取付けたハウジングをブラケットに取
付けるようにしている。
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an encoder for fixing a magnetic drum of an encoder to a shaft end of a rotating shaft of an electric motor and mounting the encoder housing to a bracket of the electric motor. In the mounting method, a magnetic drum of an encoder which is attached to a shaft end of the rotary shaft and has a hole provided on a diagonal line, and a substrate which is mounted on the bracket and has a hole on a diagonal line are provided. The magnetic drum is mounted on the rotating shaft, and the housing on which the substrate is mounted is mounted on the bracket.

【0005】[0005]

【発明の実施の形態】以下、本発明を図に示す実施例に
基づいて説明する。図1は、本発明の実施例を示すエン
コーダを取付けた電動機の要部側断面図、図2は図1の
A−A線に沿う断面図、図3は電動機の磁極位置を検出
する励磁回路である。図において、1は電動機で、この
電動機1のフレーム2の内周に固定子鉄心3が固定して
ある。4はブラケット5の軸受6に支持された回転軸
で、この回転軸4に回転子7が取付けてある。前記回転
軸4の軸端にテーパ部4aが形成されている。8はエン
コーダで、磁気ドラム9と基板10より構成されてい
る。前記磁気ドラム9は円筒状に構成され、外周に検出
用の磁極(図示せず)が設けられ、端面に対角線上の穴
9aが設けられ、この穴9aを基準に電動機1の磁極数
と同じ数の磁極(図示せず)が設けてある。前記磁気ド
ラム9の中心にテーパにした穴9bが設けてある。前記
基板10は波形整形回路を構成する電子器具(図示せ
ず)を取付け、板面の対角線上に穴10aが設けられて
いる。前記基板10はハウジング10bに取付けられ、
このハウジング10bの板バネ10cを前記ブラケット
5の取付座5aに固定するようにしてある。11は磁極
センサで、前記基板10の穴10aを基準に前記基板1
0の裏面に取付けてある。前記磁気ドラム9の穴9aと
基板10上の穴10aが一致したときエンコーダ8の例
えばU相が検出できるように設けられている。12は検
出素子で、前記磁気ドラム9の外周に設けた磁極に近接
させてハウジング10bに取付けてある。13はエンコ
ーダ8を覆うカバーで、ブラケット5に固定してある。
つぎに、エンコーダ8の電動機1への取付け方法につい
て説明をする。図3に示すように電動機1のU相を−側
に接続し、VおよびW相を+側に接続して励磁する。つ
ぎに電動機1の回転軸4を回わすと、電動機の回転軸4
が回わり、回転軸4が基準位置に達すると回転軸4の回
転が止まりロックされる。この回転軸4がロックされた
状態で、前記基板10の穴10aと磁気ドラム9の穴9
bとを一致させ、この穴10a、9aに位置決めピン
(図示せず)を挿通し、磁気ドラム9の穴9bを前記回
転軸4のテーパ部4aに嵌め込んでボルトで締め付けて
磁気ドラム9を回転軸4に固定する。つぎに、基板10
を取付けたハウジング10bの板バネ10cをブラケッ
ト5の取付座5aにボルトで固定してエンコーダ8を電
動機1に固定する。したがって、磁気ドラム9の穴9a
と基板10の穴10aを一致させて、電動機1のロック
した回転軸4に嵌め込むことで電動機の基準位置とエン
コーダの基準位置とを簡単に位置合わせをすることがで
きる。実施例では、回転軸の軸端および磁気ドラムの中
心にテーパを設けたが、テーパを付けることなく水平に
し、この水平にした軸端に磁気ドラムを固定するように
してもよい。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a sectional side view of a main part of an electric motor to which an encoder according to an embodiment of the present invention is attached, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is an excitation circuit for detecting a magnetic pole position of the electric motor. It is. In the figure, reference numeral 1 denotes an electric motor, and a stator core 3 is fixed to an inner periphery of a frame 2 of the electric motor 1. Reference numeral 4 denotes a rotating shaft supported by a bearing 6 of a bracket 5, and a rotor 7 is mounted on the rotating shaft 4. A tapered portion 4 a is formed at the shaft end of the rotating shaft 4. Reference numeral 8 denotes an encoder, which includes a magnetic drum 9 and a substrate 10. The magnetic drum 9 is formed in a cylindrical shape, a magnetic pole (not shown) for detection is provided on the outer periphery, and a diagonal hole 9a is provided on an end face. The number of magnetic poles of the electric motor 1 is the same as the number of magnetic poles of the motor 1 based on the hole 9a. A number of magnetic poles (not shown) are provided. At the center of the magnetic drum 9, a tapered hole 9b is provided. An electronic device (not shown) constituting a waveform shaping circuit is mounted on the substrate 10, and a hole 10a is provided on a diagonal line of the plate surface. The substrate 10 is attached to a housing 10b,
The leaf spring 10c of the housing 10b is fixed to the mounting seat 5a of the bracket 5. Numeral 11 denotes a magnetic pole sensor, which refers to the substrate 1 based on the hole 10a of the substrate 10.
0 is attached to the back. The encoder 8 is provided so that, for example, the U phase can be detected when the hole 9a of the magnetic drum 9 and the hole 10a on the substrate 10 match. Reference numeral 12 denotes a detection element which is attached to the housing 10b in proximity to a magnetic pole provided on the outer periphery of the magnetic drum 9. A cover 13 covers the encoder 8 and is fixed to the bracket 5.
Next, a method of attaching the encoder 8 to the electric motor 1 will be described. As shown in FIG. 3, the U phase of the electric motor 1 is connected to the minus side, and the V and W phases are connected to the plus side to excite. Next, when the rotating shaft 4 of the electric motor 1 is rotated, the rotating shaft 4 of the electric motor 1 is rotated.
Rotates, and when the rotating shaft 4 reaches the reference position, the rotation of the rotating shaft 4 is stopped and locked. With the rotating shaft 4 locked, the hole 10 a of the substrate 10 and the hole 9
b, and a positioning pin (not shown) is inserted into the holes 10a and 9a, and the hole 9b of the magnetic drum 9 is fitted into the tapered portion 4a of the rotating shaft 4 and tightened with bolts to fix the magnetic drum 9 It is fixed to the rotating shaft 4. Next, the substrate 10
Is fixed to the mounting seat 5a of the bracket 5 with bolts, and the encoder 8 is fixed to the electric motor 1. Therefore, the hole 9a of the magnetic drum 9
The reference position of the electric motor and the reference position of the encoder can be easily adjusted by aligning the reference position of the electric motor with the hole 10a of the substrate 10 and fitting the same into the locked rotating shaft 4 of the electric motor 1. In the embodiment, the shaft end of the rotating shaft and the center of the magnetic drum are provided with a taper. However, the taper may be provided horizontally without tapering, and the magnetic drum may be fixed to the horizontal shaft end.

【0006】[0006]

【発明の効果】以上述べたように、本発明によれば、電
動機にエンコーダを簡単に取付けることができ、エンコ
ーダの交換作業を簡単に行うことができる。
As described above, according to the present invention, the encoder can be easily attached to the electric motor, and the replacement work of the encoder can be easily performed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例を示すエンコーダを取付けた電
動機の要部側断面図である。
FIG. 1 is a side sectional view of a main part of an electric motor to which an encoder according to an embodiment of the present invention is attached.

【図2】図1のA−A線に沿う断面図である。FIG. 2 is a sectional view taken along line AA of FIG.

【図3】本発明の実施例を示すエンコーダを取付ける電
動機の磁極位置を検出する励磁回路である。
FIG. 3 is an excitation circuit for detecting a magnetic pole position of an electric motor on which an encoder according to an embodiment of the present invention is mounted.

【図4】従来の電動機にエンコーダの取付状態を示す斜
視図である。
FIG. 4 is a perspective view showing an attached state of an encoder to a conventional electric motor.

【符号の説明】[Explanation of symbols]

1 電動機、 2 フレーム、 3 固定子鉄心、 4
回転軸、4a テーパ部、 5 ブラケット、 5a
取付座、 6 軸受、7 回転子、 8 エンコー
ダ、 9 磁気ドラム、 9a 穴、9b テーパ、
10 基板、 10a 穴、 10b ハウジング、1
0c 板バネ、 11 磁極センサ、 12 検出素
子、 13 カバー
1 motor, 2 frame, 3 stator core, 4
Rotating shaft, 4a taper part, 5 bracket, 5a
Mounting seat, 6 bearing, 7 rotor, 8 encoder, 9 magnetic drum, 9a hole, 9b taper,
10 board, 10a hole, 10b housing, 1
0c leaf spring, 11 magnetic pole sensor, 12 detecting element, 13 cover

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 電動機(1)の回転軸(4)の軸端にエ
ンコーダ(8)の磁気ドラム(9)を固定し、前記エン
コーダ(8)のハウジング(10b)を電動機(1)の
ブラケット(5)に取付けるエンコーダの取付け方法に
おいて、 前記回転軸(4)の軸端に取付け、対角線上に設けた穴
(9a)を有するエンコーダ(8)の磁気ドラム(9)
と、 前記ブラケット(5)に取付け、対角線上に穴(10
a)を有する基板(10)とを設け、 前記磁気ドラム(9)の穴(9a)と基板(10)の穴
(10a)とを合致させて、磁気ドラム(9)を回転軸
(4)に、基板(10)を取付けたハウジング(10
b)をブラケット(5)に取付けるようにしたことを特
徴とするエンコーダの取付け方法。 【0001】
1. A magnetic drum (9) of an encoder (8) is fixed to a shaft end of a rotary shaft (4) of an electric motor (1), and a housing (10b) of the encoder (8) is attached to a bracket of the electric motor (1). The method of attaching an encoder to (5), wherein the magnetic drum (9) of the encoder (8) attached to the shaft end of the rotary shaft (4) and having a diagonally provided hole (9a).
And attached to the bracket (5), and the holes (10
a) and a hole (9a) of the magnetic drum (9) is aligned with a hole (10a) of the substrate (10), and the magnetic drum (9) is rotated by a rotating shaft (4). And a housing (10) having a substrate (10) attached thereto.
b) mounting the bracket to the bracket (5). [0001]
JP9074518A 1997-03-10 1997-03-10 Method for mounting encoder Pending JPH10257720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9074518A JPH10257720A (en) 1997-03-10 1997-03-10 Method for mounting encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9074518A JPH10257720A (en) 1997-03-10 1997-03-10 Method for mounting encoder

Publications (1)

Publication Number Publication Date
JPH10257720A true JPH10257720A (en) 1998-09-25

Family

ID=13549638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9074518A Pending JPH10257720A (en) 1997-03-10 1997-03-10 Method for mounting encoder

Country Status (1)

Country Link
JP (1) JPH10257720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4937430B1 (en) * 2011-09-30 2012-05-23 三菱電機株式会社 motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4937430B1 (en) * 2011-09-30 2012-05-23 三菱電機株式会社 motor
US20130082551A1 (en) * 2011-09-30 2013-04-04 Mitsubishi Electric Corporation Motor
WO2013046433A1 (en) * 2011-09-30 2013-04-04 三菱電機株式会社 Motor
CN103141012A (en) * 2011-09-30 2013-06-05 三菱电机株式会社 Motor
KR101346477B1 (en) * 2011-09-30 2014-01-10 미쓰비시덴키 가부시키가이샤 Motor
US8866356B2 (en) 2011-09-30 2014-10-21 Mitsubishi Electric Corporation Motor

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