JPS62202076U - - Google Patents

Description

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

第１図は従来のＰＭ形ステツピングモータの説
明図、第２図は同ブラシレスモータのマグネツト
ロータの斜視図、第３図は本考案第１実施例の概
略説明図、第４図は同同縦断面図、一部切欠分解
斜視図、第５図は同一部切欠分解斜視図、第６図
は本考案の第２実施例の概略説明図、第７図は本
考案の第３実施例の一部切欠分解斜視図、第８図
は同縦断面図、第９図は本考案の第４実施例を示
すマグネツトロータの斜視図である。 〔符号の説明〕、１……ＰＭ形ステツピングモ
ータ、２……回転軸、３……カツプ型ロータ部材
、４……駆動用磁極、５……マグネツトロータ、
６……ステータ電機子、７……空隙部、８……位
置検出用磁気センサ、９，９′，９″……ＰＭ形
ステツピングモータ、１０，１０′，１０″……
駆動用磁極、１１，１１′，１１″，１１……
磁気エンコーダ磁極、１２，１２′，１２″，１
２……カツプ型マグネツトロータ、１３，１３
―１，１３―２……ステータ電機子、１４……固
定子、１５，１６，１７，１８……ステータヨー
ク、１５ａ，１６ａ，１７ａ，１８ａ……ステー
タ磁極片、１９……コイルボビン、２０……ステ
ータコイル、２１，２２……リード線、２３，２
３′，２３″……凹凸部、２３ａ……凹部、２３
ｂ……凸部、２４……内側中空部、２５……軸受
、２６……モータ取付け板、２７……プリント基
板、２８……カツプ型部材、２９……プリント基
板、３１……固定側連結部材、３３……出力用リ
ード線。 Fig. 1 is an explanatory diagram of a conventional PM type stepping motor, Fig. 2 is a perspective view of the magnetic rotor of the same brushless motor, Fig. 3 is a schematic explanatory diagram of the first embodiment of the present invention, and Fig. 4 is the same. 5 is a partially cutaway exploded perspective view of the same, FIG. 6 is a schematic explanatory diagram of the second embodiment of the present invention, and FIG. 7 is a third embodiment of the present invention. 8 is a longitudinal sectional view of the same, and FIG. 9 is a perspective view of a magnet rotor showing a fourth embodiment of the present invention. [Explanation of symbols] 1...PM type stepping motor, 2...Rotating shaft, 3...Cup type rotor member, 4...Driving magnetic pole, 5...Magnetic rotor,
6... Stator armature, 7... Gap, 8... Magnetic sensor for position detection, 9, 9', 9''... PM type stepping motor, 10, 10', 10''...
Drive magnetic poles, 11, 11', 11'', 11...
Magnetic encoder magnetic pole, 12, 12', 12'', 1
2... Cup type magnetic rotor, 13, 13
-1, 13-2... Stator armature, 14... Stator, 15, 16, 17, 18... Stator yoke, 15a, 16a, 17a, 18a... Stator pole piece, 19... Coil bobbin, 20... ...Stator coil, 21, 22... Lead wire, 23, 2
3', 23''...Concave and convex portion, 23a...Concave portion, 23
b...Protrusion, 24...Inner hollow part, 25...Bearing, 26...Motor mounting plate, 27...Printed circuit board, 28...Cup-shaped member, 29...Printed circuit board, 31...Fixed side connection Part 33: Output lead wire.

Claims (1)

【実用新案登録請求の範囲】 (1) カツプ型または円筒型のマグネツトロータ
のステータ電機子と対向する周面に交互にＮ，Ｓ
の磁極を微細ピツチで２Ｐ（Ｐは複数の整数）極
にラジアル配向着磁した駆動用磁極を形成し、該
駆動用磁極に対向してステータ電機子を設け、上
記駆動用磁極と対向するマグネツトロータの周面
に微細なピツチで凹凸部を形成し、該凹凸部を磁
気エンコーダ磁極として利用し、該磁気エンコー
ダ用凹凸部に位置検出用磁気センサを対向配設し
た、位置検知素子を備えたＰＭ形ステツピングモ
ータ。 (2) 上記磁気エンコーダ用凹凸部は、駆動用磁
極と同一の周面であり且つ駆動用磁極と対向しな
い位置に形成してなる、実用新案登録請求の範囲
第(1)項記載の位置検知素子を備えたＰＭ形ステ
ツピングモータ。 (3) 上記磁気エンコーダ用凹凸部は、マグネツ
トロータの周面における端部に形成してなる、実
用新案登録請求の範囲第(1)項または第(2)項記載
の位置検知素子を備えたＰＭ形ステツピングモー
タ。 (4) 上記マグネツトロータの周面における端部
であり且つ上記に駆動用磁極と対向しない位置に
形成した磁気エンコーダ用凹凸部は、その面にラ
ジアル配向にＮ極またはＳ極のいずれか一方の磁
極を着磁することで、上記凹凸部に実質的にＮ，
Ｓの磁極を交互に微細ピツチで形成した磁気エン
コーダ磁極を形成してなる、実用新案登録請求の
範囲第(1)項乃至第(3)項いずれかに記載の位置検
知素子を備えたＰＭ形ステツピングモータ。[Scope of claims for utility model registration] (1) N and S are arranged alternately on the circumferential surface facing the stator armature of a cup-shaped or cylindrical magnetic rotor.
A driving magnetic pole is formed by radially magnetizing the magnetic poles of 2P (P is a plurality of integers) with a fine pitch, a stator armature is provided opposite the driving magnetic pole, and a magnet facing the driving magnetic pole is provided. A position detection element is provided, in which uneven parts are formed at a fine pitch on the circumferential surface of the net rotor, the uneven parts are used as magnetic encoder magnetic poles, and a magnetic sensor for position detection is arranged opposite to the uneven parts for the magnetic encoder. PM type stepping motor. (2) The position detection device according to claim 1 of the utility model registration claim, wherein the uneven portion for the magnetic encoder is formed on the same peripheral surface as the driving magnetic pole and at a position not facing the driving magnetic pole. PM type stepping motor equipped with an element. (3) The concavo-convex portion for the magnetic encoder includes a position sensing element as set forth in claim 1 or 2 of the utility model registration claim, which is formed at an end of the circumferential surface of the magnet rotor. PM type stepping motor. (4) The uneven portion for a magnetic encoder formed at the end of the circumferential surface of the magnet rotor and at a position not facing the driving magnetic poles has either an N pole or an S pole in radial orientation on that surface. By magnetizing the magnetic poles of
A PM type equipped with a position sensing element according to any one of claims (1) to (3) of the utility model registration claim, which is formed by forming magnetic encoder magnetic poles in which S magnetic poles are alternately formed with fine pitches. stepping motor.