JPH0419431A - Electromagnetic brake or electromagnetic clutch mainly composed of no-excitation action - Google Patents

Electromagnetic brake or electromagnetic clutch mainly composed of no-excitation action

Info

Publication number
JPH0419431A
JPH0419431A JP2121142A JP12114290A JPH0419431A JP H0419431 A JPH0419431 A JP H0419431A JP 2121142 A JP2121142 A JP 2121142A JP 12114290 A JP12114290 A JP 12114290A JP H0419431 A JPH0419431 A JP H0419431A
Authority
JP
Japan
Prior art keywords
armature
permanent magnet
annular
electromagnetic
section
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.)
Granted
Application number
JP2121142A
Other languages
Japanese (ja)
Other versions
JPH086769B2 (en
Inventor
Masao Ota
太田　将男
Hiroshi Majima
間島　宏
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.)
Shinko Electric Co Ltd
Original Assignee
Shinko Electric Co Ltd
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 Shinko Electric Co Ltd filed Critical Shinko Electric Co Ltd
Priority to JP2121142A priority Critical patent/JPH086769B2/en
Publication of JPH0419431A publication Critical patent/JPH0419431A/en
Publication of JPH086769B2 publication Critical patent/JPH086769B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00—Type of actuator operation force
    • F16D2121/18—Electric or magnetic
    • F16D2121/20—Electric or magnetic using electromagnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2129/00—Type of operation source for auxiliary mechanisms
    • F16D2129/06—Electric or magnetic
    • F16D2129/065—Permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

PURPOSE:To provide size smallness and inexpensiveness and further to cope with requirement of high torque by providing a magnet coil assembly unit which comprises an annular plastic permanent magnet, formed in a section of squared shape with one side open by opening one end part in the axial direction, and an annular electromagnetic coil fixedly housed in the above-mentioned space of square-shaped section with one side open. CONSTITUTION:An electromagnetic brake, mainly composed of no-excitation action, has a magnet coil assembly unit and an armature assembly unit. The magnet coil assembly unit comprises an annular plastic permanent magnet 11, opening one end part in the axial direction and having an external annular part formed in a section of squared shape with one side open, and an annular electromagnetic coil 12 fixedly housed in a space part of squared section with one side open of the plastic permanent magnet 11. The armature assembly unit comprises an armature 5 movable in the axial direction, opposedly arranged with a small gap to an opening end part of the plastic permanent magnet 11, and a resetting leaf spring 2 mounted over the armature 5 and an armature hub l. Action of this electromagnetic brake is substantially equal to action of the conventional electromagnetic brake.

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は無励磁作動を主体とする電磁ブレーキ又は電磁
クラッチに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic brake or an electromagnetic clutch that is mainly operated without excitation.

［従来の技術］ 従来の無励磁作動を主体とする作動ブレーキは例えば第
３図（Ａ＞に示されるように構成されており、その構造
は回転部分と固定部分とに大別することができ、回転部
分はアーマチュア組立体とアーマチュアハブ１とから構
成され、アーマチュア組立体は復帰用板ばね２、リベッ
ト３、ボルト４及びアーマチュア５から成っており、固
定部分は永久磁石６及び電磁コイル７からなる磁石コイ
ル組立体を中心に構成されており、フランジ８により機
械のフレーム（図示せず）に固定されている。[Prior Art] A conventional operating brake that mainly operates without excitation is configured as shown in FIG. 3 (A>), and its structure can be roughly divided into a rotating part and a fixed part. The rotating part consists of an armature assembly and an armature hub 1, the armature assembly consists of a return leaf spring 2, a rivet 3, a bolt 4, and an armature 5, and the fixed part consists of a permanent magnet 6 and an electromagnetic coil 7. It is constructed around a magnet coil assembly, and is fixed to a machine frame (not shown) by a flange 8.

つぎに第３図（Ａ）の電磁ブレーキの動作について第３
図（Ｂ）（Ｃ）を参照して説明する。Next, let's look at the operation of the electromagnetic brake in Figure 3 (A).
This will be explained with reference to Figures (B) and (C).

第３図（Ｂ）はブレーキ作動時の説明図であり、電磁コ
イル７に通電しない状態では、永久磁石６の磁束により
アーマチュア５を吸着し、一定の制動作用を発揮する。FIG. 3(B) is an explanatory diagram when the brake is activated. When the electromagnetic coil 7 is not energized, the armature 5 is attracted by the magnetic flux of the permanent magnet 6, and a certain braking action is exerted.

第３図（Ｃ）はブレーキ解放時の説明図であり、電磁コ
イル７に通電すると、電磁コイル７による磁束は摩擦面
に働く永久磁石６の磁束を打消すように逆方向の磁路を
形成する。そして励磁電流が一定値以上に達すると、永
久磁石６の磁束は電磁コイル７の逆方向磁束によって相
殺され、アーマチュア５と永久磁石６間の吸引力が消滅
してアーマチュア５が解放され、ブレーキが解放される
。FIG. 3(C) is an explanatory diagram when the brake is released. When the electromagnetic coil 7 is energized, the magnetic flux from the electromagnetic coil 7 forms a magnetic path in the opposite direction so as to cancel the magnetic flux of the permanent magnet 6 acting on the friction surface. do. When the excitation current reaches a certain value or more, the magnetic flux of the permanent magnet 6 is canceled out by the reverse magnetic flux of the electromagnetic coil 7, the attractive force between the armature 5 and the permanent magnet 6 disappears, the armature 5 is released, and the brake is applied. To be released.

以上は第３図（Ａ）〜（Ｃ）を参照して無励磁作動を主
体とする電磁ブレーキについて説明したが、電磁クラッ
チについても同様に考えることができる。Although the electromagnetic brake, which is mainly operated without excitation, has been described above with reference to FIGS. 3(A) to 3(C), the electromagnetic clutch can also be considered in the same way.

［発明が解決しようとする課題］ 従来の無励磁作動を主体とする作動ブレーキは小形モー
タ、ステッピングモータ、サーボモータ等の保持ブレー
キとして安価で小形高トルクが要求されるが、現状では
必ずしも十分でないという問題があった。[Problem to be solved by the invention] Conventional operating brakes that mainly operate without excitation are required to be inexpensive and have high torque as holding brakes for small motors, stepping motors, servo motors, etc., but currently this is not necessarily sufficient. There was a problem.

［課題を解決するための手段］ 本発明は上述の問題を解決するためになされたものであ
り、 第１の発明として、軸方向の一方の端部が開放され断面
コ字形に形成された外環部を有する環状のプラスチック
永久磁石と、前記プラスチック永久磁石の断面コ字形の
空所に収容固定された環状の電磁コイルとから成る磁石
コイル組立体と、前記プラスチック永久磁石の開放端部
に小ギャップを隔てて対向配置され軸方向に可動のアー
マチュアと、前記アーマチュアとアーマチュアハブとに
互って装着された復帰用板ばねとから成るアーマチュア
組立体とを有する無励磁作動を主体とする電磁ブレーキ
又は電磁クラッチを提供し、 第２の発明として、軸方向の一方の端部が開放され断面
コ字形に形成された外環部を有する環状の焼結金属永久
磁石と、前記焼結金属永久磁石の開放端部に固着された
当て板と、前記焼結金属永久磁石の断面コ字形の空所に
収容固定された環状の電磁コイルとから成る磁石コイル
組立体と、前記当て板に小ギャップを隔てて対向配置さ
れ軸方向に可動のアーマチュアと、前記アーマチュアと
アーマチュアハブとに亙って装着された復帰用板ばねと
から成るアーマチュア組立体とを有する無励磁作動を主
体とする電磁ブレーキ又は電磁クラッチを提供しようと
するものである。[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and as a first invention, there is provided an outer structure having an open end in the axial direction and a U-shaped cross section. A magnet coil assembly consisting of an annular plastic permanent magnet having a ring portion, an annular electromagnetic coil housed and fixed in a cavity having a U-shaped cross section in the plastic permanent magnet, and a small magnet coil assembly at an open end of the plastic permanent magnet. An electromagnetic brake mainly operated without excitation, having an armature assembly consisting of axially movable armatures arranged opposite to each other across a gap, and return leaf springs mutually attached to the armature and an armature hub. Alternatively, an electromagnetic clutch is provided, and as a second invention, an annular sintered metal permanent magnet having an outer ring portion having an open end in the axial direction and having a U-shaped cross section, and the sintered metal permanent magnet a magnet coil assembly consisting of a caul plate fixed to the open end of the sintered metal permanent magnet, an annular electromagnetic coil housed and fixed in a cavity having a U-shaped cross section in the sintered metal permanent magnet, and a small gap formed in the caul plate. An electromagnetic brake or an electromagnetic brake mainly operated without excitation, which has an armature assembly consisting of armatures arranged to face each other and movable in the axial direction, and a return leaf spring mounted between the armature and the armature hub. It is intended to provide a clutch.

［実施例］ 以下、本発明による無励磁作動を主体とする電磁ブレー
キの実施例について第１図及び第２図（Ａ）（Ｂ）を参
照して説明する。[Example] Hereinafter, an example of an electromagnetic brake mainly operated without excitation according to the present invention will be described with reference to FIGS. 1 and 2 (A) and (B).

第１図及び第２図（Ａ）（Ｂ）において第３図（Ａ）に
示す従来の電磁ブレーキと共通のものについては同一の
参照符号を付し、その説明は省略する。Components in FIGS. 1 and 2 (A) and 2 (B) that are common to the conventional electromagnetic brake shown in FIG. 3 (A) are designated by the same reference numerals, and a description thereof will be omitted.

本実施例においては無励磁作動を主体とする電磁ブレー
キについて説明するが、無励磁作動を主体とする電磁ク
ラッチについても同様に考えることができる。In this embodiment, an electromagnetic brake that mainly performs non-excitation operation will be described, but an electromagnetic clutch that mainly performs non-excitation operation can be similarly considered.

第１図は本発明の第１実施例を示すものであって、その
無励磁作動Ｐ主体とする電磁ブレーキは、軸方向の一方
の端部が開放され断面コ字形に形成された外環部を有す
る環状のプラスチック永久磁石１１と、プラスチック永
久磁石１１の断面コ字形の空所に収容固定された環状の
電磁コイル１２とから成る磁石コイル組立体と、プラス
チック永久磁石１１の開放端部に小ギャップを隔てて対
向配置され軸方向に可動のアーマチュア５と、アーマチ
ュア５とアーマチュアハブ１とに互って装着された復帰
用板ばね２とがら成るアーマチュア組立体とを有してい
る。FIG. 1 shows a first embodiment of the present invention, in which an electromagnetic brake mainly operated by non-excitation P has an outer ring having a U-shaped cross section with one end in the axial direction open. A magnet coil assembly consisting of an annular plastic permanent magnet 11 having It has an armature assembly consisting of an axially movable armature 5 which is disposed facing each other with a gap in between, and return leaf springs 2 which are mutually attached to the armature 5 and the armature hub 1.

第１図の電磁ブレーキの動作については第３図（Ａ）〜
（Ｃ）を参照して説明した従来の電磁ブレーキの動作と
実質的に同一である。Regarding the operation of the electromagnetic brake in Figure 1, Figure 3 (A) ~
The operation is substantially the same as that of the conventional electromagnetic brake described with reference to (C).

第２図（Ａ）（Ｂ）は本発明の第２実施例を示すもので
あって、第１図のプラスチック永久磁石１１が焼結金属
永久磁石２１となっていること以外は第１図に示す第１
実施例のものと同様であり、その場合焼結金属永久磁石
２１は割れ易いので、それを防止するため焼結金属永久
磁石２１の開放端部に当て板２２を固着するようにして
いる。2(A) and 2(B) show a second embodiment of the present invention, and are similar to FIG. 1 except that the plastic permanent magnet 11 in FIG. 1 is replaced with a sintered metal permanent magnet 21. 1st to show
This is the same as that of the embodiment, and in that case, the sintered metal permanent magnet 21 is likely to break, so to prevent this, a patch plate 22 is fixed to the open end of the sintered metal permanent magnet 21.

その当て板２２はアウターボール２２ａ及びインナーボ
ール２２ｂがそれぞれ焼結金属永久磁石２１の開放端部
の外周部及び内周部に対応するように同心状に設けられ
、その同心状の二つのボール２２ａ、２２ｂの中間部に
磁力をボール２２ａ、２２ｂに集中させるための窓２２
ｃが設けられている。The backing plate 22 has an outer ball 22a and an inner ball 22b arranged concentrically so as to correspond to the outer circumference and inner circumference of the open end of the sintered metal permanent magnet 21, respectively, and the two concentric balls 22a. , 22b is provided with a window 22 for concentrating the magnetic force on the balls 22a, 22b.
c is provided.

［発明の効果］ 本発明による無励磁作動を主体とする電磁ブレーキ又は
電磁クラッチは、従来別体で設けていた永久磁石を省略
し、電磁石の磁極をプラスチック永久磁石で構成するよ
うにしたものであるから、軸方向のスペースが減って小
形、安価となり、且つ磁気回路長も小となるため高トル
クの要求に応えることが可能になった。[Effects of the Invention] The electromagnetic brake or electromagnetic clutch according to the present invention, which is mainly operated without excitation, omit the conventionally provided separate permanent magnet, and the magnetic poles of the electromagnet are made of plastic permanent magnets. Because of this, the space in the axial direction is reduced, making it smaller and cheaper, and the length of the magnetic circuit is also reduced, making it possible to meet the demands for high torque.

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

第１図は本発明による無励磁作動を主体とする電磁ブレ
ーキの第１実施例の半断面側面図、第２図（Ａ）は本発
明による無励磁作動を主体とする電磁ブレーキの第２実
施例の半断面側面図、第２図（Ｂ）は第２図（Ａ）の電
磁ブレーキに含まれる当て板の左正面図、 第３図（Ａ）は従来の無励磁作動を主体とする電磁ブレ
ーキの半断面側面図、 第３図（Ｂ）は第３図（Ａ）の電磁ブレーキのブし一キ
作動時の動作の説明図、 第３１１（Ｃ）は第３図（Ａ＞の電磁ブレーキのブレー
キ解放時の動作の説明図である。 １　・　アーマチュアハブ ２　・・・　復帰用板ばね リベット ４　　・・・ ５　　・・ ６　　・・・ ８　　・・ １１　　・・ １２　　　・・ ２１　　・・・ ２２　　・・ ２２ａ・・・ ２ｂ ２２ｃ　　・・ ボルト アーマチュア 永久磁石 電磁コイル フランジ プラスチック永久磁石 電磁コイル 焼結金属永久磁石 当て板 アウターボール インナーボール 窓FIG. 1 is a half-sectional side view of a first embodiment of an electromagnetic brake mainly operated by non-excitation according to the present invention, and FIG. 2(A) is a second embodiment of an electromagnetic brake mainly operated by non-excitation according to the present invention. Figure 2 (B) is a left front view of the cover plate included in the electromagnetic brake of Figure 2 (A), Figure 3 (A) is a half-sectional side view of the example, and Figure 3 (A) is the conventional electromagnetic brake mainly operated by non-excitation. A half-sectional side view of the brake. Figure 3 (B) is an explanatory diagram of the operation of the electromagnetic brake in Figure 3 (A) when the brake is activated. Figure 311 (C) is an illustration of the electromagnetic brake in Figure 3 (A). It is an explanatory diagram of the operation of the brake when the brake is released. 1. Armature hub 2 ... Return leaf spring rivet 4 ... 5 ... 6 ... 8 ... 11 ... 12 ... 21 ... 22... 22a... 2b 22c... Bolt Armature Permanent magnet Electromagnetic coil Flange Plastic permanent magnet Electromagnetic coil Sintered metal Permanent magnet backing plate Outer ball Inner ball Window

Claims (1)

【特許請求の範囲】 １、軸方向の一方の端部が開放され断面コ字形に形成さ
れた外環部を有する環状のプラスチック永久磁石と、前
記プラスチック永久磁石の断面コ字形の空所に収容固定
された環状の電磁コイルとから成る磁石コイル組立体と
、前記プラスチック永久磁石の開放端部に小ギャップを
隔てて対向配置され軸方向に可動のアーマチュアと、前
記アーマチュアとアーマチュアハブとに亙って装着され
た復帰用板ばねとから成るアーマチュア組立体とを有す
ることを特徴とする無励磁作動を主体とする電磁ブレー
キ又は電磁クラッチ。 ２、軸方向の一方の端部が開放され断面コ字形に形成さ
れた外環部を有する環状の焼結金属永久磁石と、前記焼
結金属永久磁石の開放端部に固着された当て板と、前記
焼結金属永久磁石の断面コ字形の空所に収容固定された
環状の電磁コイルとから成る磁石コイル組立体と、前記
当て板に小ギャップを隔てて対向配置され軸方向に可動
のアーマチュアと、前記アーマチュアとアーマチュアハ
ブとに亙って装着された復帰用板ばねとから成るアーマ
チュア組立体とを有することを特徴とする無励磁作動を
主体とする電磁ブレーキ又は電磁クラッチ。[Scope of Claims] 1. An annular plastic permanent magnet having an outer ring having an open end in the axial direction and having a U-shaped cross section; and a plastic permanent magnet housed in a cavity having a U-shaped cross section. a magnet coil assembly consisting of a fixed annular electromagnetic coil; an axially movable armature disposed opposite the open end of the plastic permanent magnet with a small gap therebetween; and an armature extending between the armature and the armature hub. 1. An electromagnetic brake or an electromagnetic clutch mainly operated without excitation, characterized by having an armature assembly consisting of a return leaf spring attached to the armature assembly. 2. An annular sintered metal permanent magnet having an outer ring having a U-shaped cross section with one axial end open and a backing plate fixed to the open end of the sintered metal permanent magnet; , a magnet coil assembly consisting of an annular electromagnetic coil housed and fixed in a cavity having a U-shaped cross section in the sintered metal permanent magnet, and an axially movable armature disposed opposite to the backing plate with a small gap therebetween. and an armature assembly consisting of a return leaf spring mounted over the armature and the armature hub.
JP2121142A 1990-05-14 1990-05-14 Electromagnetic brake or clutch mainly for non-excitation operation Expired - Lifetime JPH086769B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2121142A JPH086769B2 (en) 1990-05-14 1990-05-14 Electromagnetic brake or clutch mainly for non-excitation operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2121142A JPH086769B2 (en) 1990-05-14 1990-05-14 Electromagnetic brake or clutch mainly for non-excitation operation

Publications (2)

Publication Number Publication Date
JPH0419431A true JPH0419431A (en) 1992-01-23
JPH086769B2 JPH086769B2 (en) 1996-01-29

Family

ID=14803901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2121142A Expired - Lifetime JPH086769B2 (en) 1990-05-14 1990-05-14 Electromagnetic brake or clutch mainly for non-excitation operation

Country Status (1)

Country Link
JP (1) JPH086769B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011048793A1 (en) 2009-10-20 2011-04-28 株式会社エー・アンド・デイ Leakage tester utilizing pressure
JP2011144834A (en) * 2010-01-12 2011-07-28 Jtekt Corp Electromagnetic clutch
CN102287457A (en) * 2011-04-21 2011-12-21 成都瑞迪机械实业有限公司 Electromagnetic clutch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011048793A1 (en) 2009-10-20 2011-04-28 株式会社エー・アンド・デイ Leakage tester utilizing pressure
JP2011144834A (en) * 2010-01-12 2011-07-28 Jtekt Corp Electromagnetic clutch
CN102287457A (en) * 2011-04-21 2011-12-21 成都瑞迪机械实业有限公司 Electromagnetic clutch

Also Published As

Publication number Publication date
JPH086769B2 (en) 1996-01-29

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