JP2011149528A - Deenergizing operation type electromagnetic brake - Google Patents

Deenergizing operation type electromagnetic brake Download PDF

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JP2011149528A
JP2011149528A JP2010012793A JP2010012793A JP2011149528A JP 2011149528 A JP2011149528 A JP 2011149528A JP 2010012793 A JP2010012793 A JP 2010012793A JP 2010012793 A JP2010012793 A JP 2010012793A JP 2011149528 A JP2011149528 A JP 2011149528A
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yoke
reference axis
electromagnetic brake
armature
operation type
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JP5471503B2 (en
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Shinsuke Kaiyama
慎介 灰山
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Sinfonia Technology Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide the novel construction of a deenergizing operation type electromagnetic brake for achieving a further smaller size while reducing the number of components without using a bolt and a collar. <P>SOLUTION: The deenergizing operation type electromagnetic brake includes: a yoke constituted of an inside yoke part having an exciting coil, a cylindrical outside yoke part covering the inside yoke part, a plate part provided at a space from the inside yoke part and integrally connected to the outside yoke part, the inside yoke part, the outside yoke part and the plate part being each arranged on a reference axis; a brake part provided between the inside yoke part and the plate part turnably around the reference axis of the yoke; an armature arranged between the inside yoke part and the brake part non-turnably around the reference axis and movably toward the reference axis; and an energizing part for energizing the armature against the brake part. The outside yoke part has a hole into which the armature or the brake part can be inserted. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は無励磁作動型電磁ブレーキに関する。   The present invention relates to a non-excitation operation type electromagnetic brake.

従来から、サーボモータや各種ロボットに用いられる無励磁作動型電磁ブレーキに関して、小型化、低消費電力化及び高トルク化を実現すべく、種々の無励磁作動型電磁ブレーキの構造が提案されている。   Conventionally, various non-excitation actuated electromagnetic brake structures have been proposed for realizing non-excitation actuated electromagnetic brakes used in servo motors and various robots in order to achieve downsizing, low power consumption and high torque. .

現在、無励磁作動型電磁ブレーキは、例えば３０φ程度の直径を有する程度までに小型化が実現しており、例えば特許文献１記載のような無励磁作動型電磁ブレーキがあり、また、例えば図６に表わされるような構造が採用されている。図６は、従来の小型無励磁作動型電磁ブレーキの構造を示す概略縦断面図である。   At present, the non-excitation actuating electromagnetic brake has been reduced in size to the extent that it has a diameter of, for example, about 30φ. The structure as shown in is adopted. FIG. 6 is a schematic longitudinal sectional view showing a structure of a conventional small non-excitation operation type electromagnetic brake.

従来の小型無励磁作動型電磁ブレーキ１００は、図６に示すように、ヨーク１０２、ヨーク１０２に内蔵されたコイル体１０４、ヨーク１０２に対向配置されたプレート１０６、ヨーク１０２とプレート１０６との間に配置されヨーク１０２の基準軸線Ｃ回りに回動可能に設けられた制動部１０８、ヨーク１０２と制動部１０８との間に配置され基準軸線Ｃ回りに回動不能かつ基準軸線Ｃ方向に移動可能に配置されたアーマチュア１１０、プレート１０６及びアーマチュア１１０をヨーク１０２に締結するボルト１１２、を具備している。   As shown in FIG. 6, a conventional small non-excitation operation type electromagnetic brake 100 includes a yoke 102, a coil body 104 built in the yoke 102, a plate 106 disposed opposite to the yoke 102, and between the yoke 102 and the plate 106. Is disposed between the yoke 102 and the brake 108 so that it cannot rotate about the reference axis C and can move in the direction of the reference axis C. , The armature 110 disposed on the plate, the plate 106, and a bolt 112 for fastening the armature 110 to the yoke 102.

ヨーク１０２は、基準軸線Ｃ回りにおいて中心部に設けられた開口部１０２ａと、基準軸線Ｃからみて開口部１０２ａの外側に設けられた環状の凹部１０２ｂと、で構成されており、凹部１０２ｂに内蔵されたコイル体１０４は、ボビン（芯体）１０４ａとボビン１０４ａに捲回された励磁コイル１０４ｂとで構成されている。   The yoke 102 includes an opening 102a provided in the center around the reference axis C, and an annular recess 102b provided outside the opening 102a when viewed from the reference axis C, and is built in the recess 102b. The coil body 104 is composed of a bobbin (core body) 104a and an exciting coil 104b wound around the bobbin 104a.

また、基準軸線Ｃからみて凹部１０２ｂの外側には、開口部１０２ｃが設けられており、ここには、図示しないが、アーマチュア１１０を制動部１０８に対して付勢する圧縮バネが内蔵されている。更に、ボルト１１２は、カラー１１６を介してプレート１０６をヨーク１０２に締め付けている。アーマチュア１１０は、カラー１１６をガイドとして摺動可能となるようにプレート１０６及びヨーク１０２の間に配置されている。   In addition, an opening 102c is provided outside the recess 102b when viewed from the reference axis C, and a compression spring that urges the armature 110 against the braking portion 108 is incorporated therein, although not shown. . Further, the bolt 112 fastens the plate 106 to the yoke 102 via the collar 116. The armature 110 is disposed between the plate 106 and the yoke 102 so as to be slidable with the collar 116 as a guide.

特願平５−２２７３０号公報Japanese Patent Application No. 5-22730

しかしながら、上記のような従来の小型無励磁作動型電磁ブレーキ１００においては、プレート１０６が、ボルト１１２及びカラー１１６を用いてヨーク１０２に締め付けて固定されており、部品点数が多くなり、これが小型化を妨げる要因の１つになっていた。   However, in the conventional small non-excitation operation type electromagnetic brake 100 as described above, the plate 106 is fastened and fixed to the yoke 102 by using the bolt 112 and the collar 116, and the number of parts increases, which reduces the size. It was one of the factors that hindered it.

そこで、本発明は、上記従来技術の有する課題に鑑みてなされたものであり、ボルトやカラーを用いないことによって部品点数を減らし、より一層小型化された小型無励磁作動型電磁ブレーキの新規な構造を提供することを目的とする。   Therefore, the present invention has been made in view of the above-described problems of the prior art, and reduces the number of parts by not using bolts or collars, and is a novel non-excitation actuated electromagnetic brake that is further downsized. The purpose is to provide a structure.

本発明者は、上記目的を達成すべく鋭意研究を重ねた結果、無励磁作動型電磁ブレーキの構造において、無励磁作動型電磁ブレーキの性能を妨げない範囲でボルト及びカラーを用いずにプレートを固定するにはどのような構造を採用すればいいのか鋭意検討を重ねた結果、プレートがヨークの一部に直接接続・固定された構成を採用すれば、部品点数を減らしてより一層小型化された無励磁作動型電磁ブレーキを実現できることを見出し、本発明を完成するに至った。   As a result of intensive research to achieve the above object, the present inventor has determined that the plate can be used without using bolts and collars in the structure of the non-excited operation type electromagnetic brake as long as the performance of the non-excitation operation type electromagnetic brake is not disturbed. As a result of intensive studies on what kind of structure should be used for fixing, if a configuration in which the plate is directly connected and fixed to a part of the yoke is adopted, the number of parts can be reduced and the size can be further reduced. The present inventors have found that a non-excitation operation type electromagnetic brake can be realized and have completed the present invention.

上記の課題を解決すべく、本発明は、
励磁コイルを備えた内側ヨーク部と、内側ヨーク部を覆う筒状の外側ヨーク部と、内側ヨーク部に間隔をおいて設けられ、外側ヨーク部に一体的に接続されたプレート部と、をそれぞれ基準軸線上に配置してなるヨークと、
内側ヨーク部とプレート部との間において、ヨークの基準軸線回りに回動可能に設けられた制動部と、
内側ヨーク部と制動部との間において、基準軸線回りに回動不能かつ基準軸線方向に移動可能に配置されたアーマチュアと、
アーマチュアを前記制動部に対して付勢する付勢部と、
を具備し、
外側ヨーク部は、アーマチュア又は制動部を挿入可能な穴部を有することを特徴とする無励磁作動型電磁ブレーキを提供する。 In order to solve the above problems, the present invention provides:
An inner yoke portion provided with an exciting coil, a cylindrical outer yoke portion covering the inner yoke portion, and a plate portion provided at an interval to the inner yoke portion and integrally connected to the outer yoke portion, respectively A yoke arranged on a reference axis,
Between the inner yoke part and the plate part, a braking part provided to be rotatable around the reference axis of the yoke,
An armature disposed between the inner yoke portion and the braking portion so as not to rotate around the reference axis and to move in the reference axis direction;
A biasing portion that biases the armature against the braking portion;
Comprising
The outer yoke portion has a hole portion into which an armature or a braking portion can be inserted.

このような構成を有する本発明の無励磁作動型電磁ブレーキにおいては、プレート部が外側ヨーク部の一部に直接接続・固定された構成が採用されていることから、プレートをヨークに固定するためにボルト及びカラー等の別部材を用いる必要がなく、部品点数が少なく従来の無励磁作動型電磁ブレーキに比べてより一層の小型化が可能である。   In the non-excitation operation type electromagnetic brake of the present invention having such a configuration, the plate portion is directly connected to and fixed to a part of the outer yoke portion, so that the plate is fixed to the yoke. In addition, it is not necessary to use separate members such as bolts and collars, and the number of parts is small, and further miniaturization is possible as compared with the conventional non-excitation operation type electromagnetic brake.

上記の本発明の無励磁作動型電磁ブレーキにおいては、前記アーマチュアが前記外側ヨーク部の穴部の一部に嵌合することにより前記基準軸線回りに回動不能かつ前記基準軸線方向に移動可能に配置されている、ことが好ましい。   In the above-described non-excitation operation type electromagnetic brake of the present invention, the armature is fitted to a part of the hole portion of the outer yoke portion so that it cannot rotate around the reference axis and can move in the reference axis direction. It is preferable that they are arranged.

このような構成を有する本発明の無励磁作動型電磁ブレーキにおいては、アーマチュアの固定にボルト及びカラー等の別部材を用いる必要がないことから、部品点数が少なく従来の無励磁作動型電磁ブレーキに比べてより一層の小型化が可能である。また、アーマチュアを外側ヨーク部に嵌合させることは比較的簡単な構造で実現することができ、製造工程上有利である。   In the non-excitation actuating electromagnetic brake of the present invention having such a configuration, it is not necessary to use separate members such as bolts and collars for fixing the armature. Further downsizing is possible. Moreover, fitting the armature to the outer yoke portion can be realized with a relatively simple structure, which is advantageous in the manufacturing process.

上記の本発明の無励磁作動型電磁ブレーキにおいては、前記付勢部が前記内側ヨーク部に設けられた中央開口部に内蔵されている、ことが好ましい。   In the non-excitation operation type electromagnetic brake of the present invention described above, it is preferable that the urging portion is built in a central opening provided in the inner yoke portion.

このような構成を有する本発明の無励磁作動型電磁ブレーキにおいては、前記内側ヨーク部の中央開口部を有効利用してそこに前記付勢部が内蔵されていることから、従来の無励磁作動型電磁ブレーキに比べてより一層の小型化が可能である。   In the non-excitation operation type electromagnetic brake of the present invention having such a configuration, the central opening portion of the inner yoke portion is effectively used and the biasing portion is incorporated therein, so that the conventional non-excitation operation is performed. Further downsizing is possible compared to the electromagnetic brake.

本発明によれば、ボルトやカラーを用いないことによって部品点数を減らし、より一層小型化された小型無励磁作動型電磁ブレーキの新規な構造を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the number of parts can be reduced by not using a volt | bolt and a collar, and the novel structure of the small non-excitation actuating type electromagnetic brake further reduced in size can be provided.

本発明の無励磁作動型電磁ブレーキの一実施形態の構造を概略的に示す斜視図である。It is a perspective view showing roughly the structure of one embodiment of the non-excitation operation type electromagnetic brake of the present invention. 図１に示す無励磁作動型電磁ブレーキ１において、Ｘ−Ｘ線で切り欠いた断面構造を示す斜視図である。FIG. 2 is a perspective view showing a cross-sectional structure taken along line XX in the non-excitation operation type electromagnetic brake 1 shown in FIG. 1. 図１に示す無励磁作動型電磁ブレーキ１をＸ−Ｘ線断面図である。FIG. 2 is a cross-sectional view of the non-excitation operation type electromagnetic brake 1 shown in FIG. 図１に示す無励磁作動型電磁ブレーキ１において、制動部８を省略した構造を示す斜視図である。FIG. 2 is a perspective view showing a structure in which a braking unit 8 is omitted in the non-excitation operation type electromagnetic brake 1 shown in FIG. 1. 図１に示す無励磁作動型電磁ブレーキ１におけるアーマチュア１０の上面図である。It is a top view of the armature 10 in the non-excitation operation type electromagnetic brake 1 shown in FIG. 従来の無励磁作動型電磁ブレーキの構造を示す概略断面図である。It is a schematic sectional drawing which shows the structure of the conventional non-excitation actuated electromagnetic brake.

以下、図面を参照しながら本発明の代表的な実施形態について説明する。なお、以下の説明では、同一または相当部分には同一符号を付し、重複する説明は省略することもある。また、各図面における各部材の形状や寸法は、実際に本発明の作用効果を奏するための形状や寸法を必ずしも高精度で表していない場合もある。   Hereinafter, representative embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. In addition, the shape and size of each member in each drawing may not necessarily represent the shape and size for achieving the effects of the present invention with high accuracy.

本実施形態の無励磁作動型電磁ブレーキ１は、図１に示すように、ヨーク２と、励磁コイル４（図２参照）と、制動部８と、アーマチュア１０と、圧縮バネ１２（図３参照）と、を具備する。なお、励磁コイル４は、図２において概略的に示しており、また、通電するための電源に接続されるリード線が接続されているが、図面においては省略している。   As shown in FIG. 1, the non-excitation operation type electromagnetic brake 1 of the present embodiment includes a yoke 2, an excitation coil 4 (see FIG. 2), a braking unit 8, an armature 10, and a compression spring 12 (see FIG. 3). And). The excitation coil 4 is schematically shown in FIG. 2 and is connected to a lead wire connected to a power source for energization, but is omitted in the drawing.

本実施形態において、ヨーク２は、鉄等の強磁性体からなり、図２及び図３に示すように、内側ヨーク部２ａと外側ヨーク部２ｂとで構成されたいわゆる２体構造を有する。そして、プレート部６が、内側ヨーク部２ａに間隔をおいて、外側ヨーク部２ｂに一体的に接続され、内側ヨーク部２ａ、外側ヨーク部２ｂ及びプレート部６が基準軸線上に配置されている。内側ヨーク部２ａには励磁コイル４が捲回されており、内側ヨーク部２ａと外側ヨーク部２ｂとの間において励磁コイル４が内蔵された構成を有している。内側ヨーク部２ａと外側ヨーク部２ｂとは、例えば、接着剤等の化学的な連結手段、ボルトとナットの組合せ、又は凹部と凸部の組合せ若しくはこれらと嵌合部との組合せ等の物理的な連結手段、圧入、焼ばめ等、従来公知の接合手段で連結されている。   In the present embodiment, the yoke 2 is made of a ferromagnetic material such as iron and has a so-called two-body structure composed of an inner yoke portion 2a and an outer yoke portion 2b as shown in FIGS. The plate portion 6 is integrally connected to the outer yoke portion 2b with a space from the inner yoke portion 2a, and the inner yoke portion 2a, the outer yoke portion 2b, and the plate portion 6 are disposed on the reference axis. . An excitation coil 4 is wound around the inner yoke portion 2a, and the excitation coil 4 is built between the inner yoke portion 2a and the outer yoke portion 2b. The inner yoke portion 2a and the outer yoke portion 2b are, for example, physical connecting means such as a chemical connecting means such as an adhesive, a combination of a bolt and a nut, a combination of a concave portion and a convex portion, or a combination of these and a fitting portion. Connecting means such as a simple connecting means, press fitting, and shrink fitting.

内側ヨーク部２ａは、図２及び図３に示すように、基準軸（中心軸乃至はモータの回転軸と一致する。）線Ｃに略直交し互いに略平行に対向する外側端面２ａ1と係合端面２ａ2とを有しかつフランジ状部分２ａ3を有する肉厚の筒状部材で構成されている。内側ヨーク部２ａにおいて、基準軸線Ｃ方向に貫通して延びている中央開口部２ｃは、開口径の大きい大径部２ｃ1と開口径の小径部２ｃ2とを有し、大径部２ｃ1と小径部２ｃ2との間には、アーマチュア１０側に面する段差部２ｄが形成されている。 As shown in FIGS. 2 and 3, the inner yoke portion 2a is engaged with an outer end surface 2a 1 which is substantially orthogonal to the reference axis (center axis or motor rotation axis) line C and substantially parallel to each other. It is constituted by a thick cylindrical member having a joint end surface 2a 2 and having a flange-like portion 2a 3 . In the inner yoke portion 2a, a central opening 2c extending through the reference axis line C direction, and a small-diameter portion 2c 2 big large-diameter portion 2c 1 and the opening diameter of the aperture diameter, the large-diameter portion 2c 1 And a small-diameter portion 2c 2 are formed with a step portion 2d facing the armature 10 side.

内側ヨーク部２ａの中央開口部２ｃには、図３に示すように、付勢部である圧縮バネ１２が１つ内蔵されており、この圧縮バネ１２は、段差部２ｄとアーマチュア１０とに挟まれて、アーマチュア１０に対して付勢力を付与しており、組立後の無励磁作動型電磁ブレーキ１においては、アーマチュア１０はこの圧縮バネ１２によって制動部８に押圧されている。なお、図２において圧縮バネ１２は省略されている。   As shown in FIG. 3, one compression spring 12 as a biasing portion is built in the central opening 2c of the inner yoke portion 2a. The compression spring 12 is sandwiched between the step portion 2d and the armature 10. Thus, a biasing force is applied to the armature 10, and in the non-excited operation type electromagnetic brake 1 after assembly, the armature 10 is pressed against the braking portion 8 by the compression spring 12. In FIG. 2, the compression spring 12 is omitted.

外側ヨーク部２ｂは、図２及び図３に示すように、略筒状であり、より具体的には、内側ヨーク部２ａのフランジ状部分２ａ3に当接して内側ヨーク部２ａを覆う筒状部材と、図１及び図４に示すように、当該筒状部材のアーマチュア１０側の端部（係合端面）２ｂ1から基準軸線Ｃ方向上方に延びるように設けられた２つの延設部２ｂ2と、で構成されており、延設部２ｂ2の両端には切り欠かれて段差部２ｂ3が形成されている。 The outer yoke portion 2b, as shown in FIGS. 2 and 3, a substantially cylindrical, and more specifically, cylindrical shape covering the inner yoke portion 2a abuts against the flange portion 2a 3 of the inner yoke portion 2a member and, as shown in FIGS. 1 and 4, the two extension portions 2b provided so as to extend the end of the armature 10 side of the cylindrical member from the (engagement end surface) 2b 1 to the reference axis C above 2, and a stepped portion 2 b 3 is formed at both ends of the extended portion 2 b 2 by cutting out.

内側ヨーク部２ａに捲回されている励磁コイル４は、図３に示すように、ボビン等には捲回されず、内側ヨーク部２ａを構成する筒状部材に、例えばポリイミドフィルム等の絶縁部１４を介した状態で捲回されている。励磁コイル４を構成する金属線としては、種々の断面を有するものを採用することができるが、捲回密度や第一ヨーク部２ａの筒状部材との接触面積を最大限にして磁気吸引力（高トルク化）を高めることができるという観点から、断面矩形のいわゆる平角線を用いるのが好ましい。   As shown in FIG. 3, the exciting coil 4 wound around the inner yoke portion 2a is not wound around a bobbin or the like, and is formed on an insulating portion such as a polyimide film on a cylindrical member constituting the inner yoke portion 2a. 14 is wound around. As the metal wire constituting the exciting coil 4, those having various cross sections can be adopted, but the magnetic attraction force can be maximized by making the winding density and the contact area with the cylindrical member of the first yoke portion 2 a maximum. From the viewpoint that (high torque) can be increased, it is preferable to use a so-called rectangular wire having a rectangular cross section.

プレート部６は、上記のように内側ヨーク部２ａに対して一定の間隔をおいて外側ヨーク部２ｂに一体的に接続されており、より具体的には、図１に示すように、略円盤状で、外側ヨーク部２ｂの係合端面２ｂ1に設けられた延設部２ｂ2の上端部に接続され、外側ヨーク部２ｂに間隔をおいて接続されている。即ち、無励磁作動型電磁ブレーキ１において、プレート部６は、外側ヨーク部２ｂの係合端面２ｂ1及び内側ヨーク部２ａの係合端面２ａ2側に対向して配置されている。このようにプレート部６が外側ヨーク部２ｂに間隔をおいて一体的に接続されており、外側ヨーク部２ｂに延設部２ｂ2及び段差部２ｂ3が設けられていることから、無励磁作動型電磁ブレーキ１は、外側ヨーク部２ｂの側面上部に、制動部８及びアーマチュア１０を外周側から内周側へ挿入可能な穴部が設けられた構成を有している。 As described above, the plate portion 6 is integrally connected to the outer yoke portion 2b at a constant interval with respect to the inner yoke portion 2a. More specifically, as shown in FIG. It is connected to the upper end portion of the extending portion 2b 2 provided on the engagement end surface 2b 1 of the outer yoke portion 2b, and is connected to the outer yoke portion 2b with an interval. That is, in the non-excitation operation type electromagnetic brake 1, the plate portion 6 is disposed to face the engagement end surface 2b 1 of the outer yoke portion 2b and the engagement end surface 2a 2 of the inner yoke portion 2a. Thus, the plate portion 6 is integrally connected to the outer yoke portion 2b at an interval, and the extended portion 2b 2 and the stepped portion 2b 3 are provided on the outer yoke portion 2b. The type electromagnetic brake 1 has a configuration in which a hole portion through which the braking portion 8 and the armature 10 can be inserted from the outer peripheral side to the inner peripheral side is provided in the upper side surface of the outer yoke portion 2b.

このプレート部６と外側ヨーク部２ｂとの接続は、例えば、プレート部６と外側ヨーク部２ｂとを溶接又はネジ止めで接続することによって得られ、また、プレート部６と外側ヨーク部２ｂとを一体的に成型することによって一体的な構成を採用してもよい。   The connection between the plate portion 6 and the outer yoke portion 2b is obtained, for example, by connecting the plate portion 6 and the outer yoke portion 2b by welding or screwing, and the plate portion 6 and the outer yoke portion 2b are connected. You may employ | adopt an integral structure by shape | molding integrally.

また、プレート部６においては、図２に示すように、基準軸線Ｃ上においてプレート部６の中心部にはモータの回転軸を挿通するための貫通した円形の開口６ａが形成されており、本発明はこれに限定されるわけではないが、本実施形態におけるこの開口６ａの開口径は内側ヨーク部２ａの中央開口部２ｃの開口径よりも大きい。換言すると、プレート部６は環状構造を有するともいえる。   In the plate portion 6, as shown in FIG. 2, a circular opening 6a that penetrates the rotation shaft of the motor is formed in the center portion of the plate portion 6 on the reference axis C. Although the invention is not limited to this, the opening diameter of the opening 6a in the present embodiment is larger than the opening diameter of the central opening 2c of the inner yoke portion 2a. In other words, it can be said that the plate portion 6 has an annular structure.

プレート部６のヨーク２側には、図１〜図４に示すように、基準軸線Ｃ回りに制動部８が設けられている。制動部８は、プレート部６よりも外径が小さい略円盤状であり、基準軸線Ｃ上において制動部８の中心部には、モータの回転軸を挿通するための貫通した矩形の開口８ａが形成されている。本発明はこれに限定されるわけではないが、本実施形態におけるこの開口８ａの開口径は、ヨーク２の中央開口部２ｃの開口径よりも大きくプレート部６の開口６ａの開口径よりも小さい。   As shown in FIGS. 1 to 4, a braking portion 8 is provided around the reference axis C on the yoke 2 side of the plate portion 6. The braking portion 8 has a substantially disk shape having an outer diameter smaller than that of the plate portion 6. A central opening of the braking portion 8 on the reference axis C is provided with a rectangular opening 8 a that penetrates the rotating shaft of the motor. Is formed. Although the present invention is not limited to this, the opening diameter of the opening 8a in this embodiment is larger than the opening diameter of the central opening 2c of the yoke 2 and smaller than the opening diameter of the opening 6a of the plate part 6. .

次に、内側ヨーク部２ａの係合端面２ａ2及び外側ヨーク部２ｂの係合端面２ｂ1と制動部８との間には、図１〜図４に示すように、ヨーク２に対して基準軸線Ｃ回りに回動不能で、かつ、基準軸線Ｃ方向に移動可能に支持されたアーマチュア１０が配置されている。 Next, between the engagement end surface 2a 2 of the inner yoke portion 2a and the engagement end surface 2b 1 of the outer yoke portion 2b and the braking portion 8, as shown in FIGS. An armature 10 that is not rotatable about the axis C and is supported so as to be movable in the direction of the reference axis C is disposed.

このアーマチュア１０は、略円盤状に形成された鉄等の強磁性体からなり、基準軸線Ｃ上においてアーマチュア１０の中心部には、モータの回転軸を挿通するための貫通した円形の開口１０ａが形成されている。本発明はこれに限定されるわけではないが、本実施形態におけるこの開口１０ａの開口径は、内側ヨーク部２ａの中央開口部２ｃのうちの段差２ｄより下の部分の径と略一致している。   The armature 10 is made of a ferromagnetic material such as iron formed in a substantially disk shape, and a circular opening 10a that penetrates the rotation shaft of the motor is formed at the center of the armature 10 on the reference axis C. Is formed. Although the present invention is not limited to this, the opening diameter of the opening 10a in the present embodiment is substantially the same as the diameter of the portion below the step 2d in the central opening 2c of the inner yoke portion 2a. Yes.

ここで、図５に示すように、本実施形態のアーマチュア１０は略円盤状の形状を有しているが、外周部において、中心ｃからみて点対称となる２箇所に、角度αの範囲の切欠部１０ｂが設けられている。そして、本実施形態の無励磁作動型電磁ブレーキ１においては、図１及び図４に示すように、基準軸線Ｃ方向からみて、アーマチュア１０の切欠部１０ｂの部分に外側ヨーク部２ｂの延設部２ｂ2が入り込んでいる。これによってアーマチュア１０は、外側ヨーク部２ｂの穴部の一部に嵌合し、は基準軸線Ｃ回りに回動不能かつ基準軸線Ｃ方向に移動可能に配置されている。 Here, as shown in FIG. 5, the armature 10 of the present embodiment has a substantially disk shape, but in the outer peripheral portion, the angle α is in a range of an angle α at two points symmetric with respect to the center c. A notch 10b is provided. In the non-excitation operation type electromagnetic brake 1 of the present embodiment, as shown in FIGS. 1 and 4, the extending portion of the outer yoke portion 2 b is formed in the notch portion 10 b of the armature 10 when viewed from the reference axis C direction. 2b 2 has entered. As a result, the armature 10 is fitted in a part of the hole of the outer yoke portion 2b, and is arranged so as not to rotate around the reference axis C and to move in the direction of the reference axis C.

なお、図２及び図３に示すように、ヨーク２における内側ヨーク部２ａの係合端面２ａ2及び外側ヨーク部２ｂの係合端面２ｂ1は、略同一の高さを有しており、ヨーク２とプレート部６との間隔（距離）、即ち、内側ヨーク部２ａの係合端面２ａ2及び外側ヨーク部２ｂの係合端面２ｂとプレート部６との間隔は、制動部８及びアーマチュア１０の厚さ、並びに圧縮バネ１２の圧縮強度等によって、適宜選択される。 2 and 3, the engagement end surface 2a 2 of the inner yoke portion 2a and the engagement end surface 2b 1 of the outer yoke portion 2b in the yoke 2 have substantially the same height. 2 and the plate portion 6, that is, the distance between the engagement end surface 2 a 2 of the inner yoke portion 2 a and the engagement end surface 2 b of the outer yoke portion 2 b and the plate portion 6 is determined between the brake portion 8 and the armature 10. The thickness is selected as appropriate according to the compression strength of the compression spring 12 and the like.

このように、本実施形態の無励磁作動型電磁ブレーキ１は、プレート部６がヨーク２の一部に直接接続・固定された構成を有しており、また、アーマチュア１０がヨーク２のうちの外側ヨーク部２ｂに嵌合することにより基準軸線Ｃ回りに回動不能かつ基準軸線Ｃ方向に移動可能に配置されていることから、プレート部６及びアーマチュア１０のヨーク２への固定にボルト及びカラー等の別部材が使用されておらず、部品点数が少なく従来に比べてより一層の小型化が実現されている。   As described above, the non-excitation operation type electromagnetic brake 1 of the present embodiment has a configuration in which the plate portion 6 is directly connected and fixed to a part of the yoke 2, and the armature 10 is included in the yoke 2. Since the outer yoke portion 2b is fitted to the outer yoke portion 2b so that it cannot rotate around the reference axis C and is movable in the direction of the reference axis C, bolts and collars are used to fix the plate portion 6 and the armature 10 to the yoke 2. No other member such as is used, and the number of parts is small, and further downsizing is realized as compared with the prior art.

また、本実施形態の無励磁作動型電磁ブレーキ１は、付勢部である圧縮バネ１２が内側ヨーク部２ａの中央開口部２ｃに内蔵されていることから、この点からも、従来の無励磁作動型電磁ブレーキに比べてより一層の小型化が実現されている。このような小型化により、本実施形態の無励磁作動型電磁ブレーキ１においては、励磁コイル４のためにより広いスペースが確保され、これにより、小型化と大磁気吸引力（高トルク化）、低消費電力及び低発熱量とのバランス良い改善が期待される。   In addition, the non-excitation actuating electromagnetic brake 1 of the present embodiment includes a compression spring 12 that is an urging portion built in the central opening 2c of the inner yoke portion 2a. Further downsizing is realized as compared with the operation type electromagnetic brake. Due to such downsizing, in the non-excitation actuating electromagnetic brake 1 of the present embodiment, a wider space is secured for the exciting coil 4, thereby reducing the size and the large magnetic attraction (high torque), low A good balance between power consumption and low calorific value is expected.

更に、本実施形態の無励磁作動型電磁ブレーキ１では、プレート部６及びアーマチュア１０のヨーク２への固定にボルト及びカラー等の別部材が使用されておらず、制動部８のうちのプレート部６及びヨーク２（内側ヨーク部２ａ及び外側ヨーク部２ｂ）と接する部分の面積をより大きくすることができ、大磁気吸引力（高トルク化）も期待される。なお、トルクは、摩擦係数と摩擦面数と押付け荷重と平均摩擦半径との積で表わすことができる。   Furthermore, in the non-excitation operation type electromagnetic brake 1 of this embodiment, separate members such as bolts and collars are not used for fixing the plate portion 6 and the armature 10 to the yoke 2, and the plate portion of the braking portion 8 is not used. 6 and the yoke 2 (the inner yoke portion 2a and the outer yoke portion 2b) can be increased in area, and a large magnetic attractive force (high torque) is also expected. The torque can be expressed as a product of a friction coefficient, the number of friction surfaces, a pressing load, and an average friction radius.

以上、本発明の無励磁作動型電磁ブレーキの代表的な実施形態について説明したが、本発明はこれらのみに限定されるものではなく、本発明の技術的思想の範囲において種々の設計変更が可能である。   The typical embodiments of the non-excitation operation type electromagnetic brake of the present invention have been described above, but the present invention is not limited to these, and various design changes can be made within the scope of the technical idea of the present invention. It is.

例えば、上記実施形態においては、内側コイルに絶縁部材を介して励磁コイルが捲回されている態様について説明したが、励磁コイルと当該励磁コイルが捲回されたボビン（芯体）とを含むコイル体を、内側コイルと外側コイルとの間に内蔵させても構わない。   For example, in the above-described embodiment, the aspect in which the exciting coil is wound around the inner coil via the insulating member has been described. However, the coil including the exciting coil and the bobbin (core body) around which the exciting coil is wound. The body may be built between the inner coil and the outer coil.

また、上記実施形態においては、内側ヨーク部２ａと外側ヨーク部２ｂとが別部材である態様について説明したが、プレート部６と外側ヨーク部２ｂとの接合の仕方を含む無励磁作動型電磁ブレーキの製造方法によっても異なるが、内側ヨーク部２ａと外側ヨーク部２ｂとが一体的な構成を有していてもよい。   Moreover, in the said embodiment, although the aspect in which the inner side yoke part 2a and the outer side yoke part 2b were separate members was demonstrated, the nonexcitation actuated electromagnetic brake containing the joining method of the plate part 6 and the outer side yoke part 2b was demonstrated. However, the inner yoke portion 2a and the outer yoke portion 2b may have an integral structure.

本発明の無励磁作動型電磁ブレーキは、小型無励磁作動型電磁ブレーキとして、特にサーボモータやロボット用モータ等の小型モータの無励磁作動型電磁ブレーキとして好適に用いることができる。   The non-excitation operation type electromagnetic brake of the present invention can be suitably used as a small non-excitation operation type electromagnetic brake, particularly as a non-excitation operation type electromagnetic brake of a small motor such as a servo motor or a robot motor.

１、１００・・・無励磁作動型電磁ブレーキ、
２、１０２・・・ヨーク、
２ａ・・・内側ヨーク部、
２ｂ・・・外側ヨーク部、
４、１０４ｂ・・・励磁コイル、
６・・・プレート部、
８、１０８・・・制動部、
１０、１１０・・・アーマチュア、
１２・・・圧縮バネ、
１０４ａ・・・ボビン、
１０６・・・プレート、
１１２・・・ボルト、
１１４・・・リード線、
１１６・・・カラー。 1, 100 ... Non-excitation electromagnetic brake,
2, 102 ... Yoke,
2a ... Inner yoke part,
2b ... outer yoke part,
4, 104b ... excitation coil,
6 ... Plate part,
8, 108 ... braking part,
10, 110 ... armature,
12 ... Compression spring,
104a ... bobbin,
106 ... Plate,
112 ... bolts,
114 ... lead wire,
116: Color.

Claims (3)

励磁コイルを備えた内側ヨーク部と、前記内側ヨーク部を覆う筒状の外側ヨーク部と、前記内側ヨーク部に間隔をおいて設けられ、前記外側ヨーク部に一体的に接続されたプレート部と、をそれぞれ基準軸線上に配置してなるヨークと、
前記内側ヨーク部と前記プレート部との間において、前記ヨークの基準軸線回りに回動可能に設けられた制動部と、
前記内側ヨーク部と前記制動部との間において、前記基準軸線回りに回動不能かつ前記基準軸線方向に移動可能に配置されたアーマチュアと、
前記アーマチュアを前記制動部に対して付勢する付勢部と、
を具備し、
前記外側ヨーク部は、前記アーマチュア又は前記制動部を挿入可能な穴部を有することを特徴とする無励磁作動型電磁ブレーキ。 An inner yoke portion provided with an exciting coil, a cylindrical outer yoke portion covering the inner yoke portion, a plate portion provided at an interval in the inner yoke portion and integrally connected to the outer yoke portion; , Each having a yoke arranged on a reference axis,
A braking portion provided between the inner yoke portion and the plate portion so as to be rotatable around a reference axis of the yoke;
Between the inner yoke portion and the braking portion, an armature disposed so as not to rotate around the reference axis and to move in the reference axis direction;
A biasing portion that biases the armature against the braking portion;
Comprising
The non-excited operation type electromagnetic brake, wherein the outer yoke portion has a hole portion into which the armature or the braking portion can be inserted. 前記アーマチュアが前記外側ヨーク部の穴部の一部に嵌合することにより前記基準軸線回りに回動不能かつ前記基準軸線方向に移動可能に配置されている、
請求項１に記載の無励磁作動型電磁ブレーキ。 The armature is disposed so as not to rotate around the reference axis and to move in the reference axis direction by fitting into a part of the hole of the outer yoke portion.
The non-excitation operation type electromagnetic brake according to claim 1. 前記付勢部が前記内側ヨーク部に設けられた中央開口部に内蔵されている、
請求項１又は２に記載の無励磁作動型電磁ブレーキ。 The biasing part is built in a central opening provided in the inner yoke part,
The non-excitation actuated electromagnetic brake according to claim 1 or 2.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101910848B1 (en) 2014-06-24 2018-10-23 가부시키가이샤 하모닉 드라이브 시스템즈 Non-excitation operative brake and motor with non-excitation operative brake
JP2018182250A (en) * 2017-04-21 2018-11-15 小倉クラッチ株式会社 Excitation device and non-excitation operative brake
JP2019002517A (en) * 2017-06-16 2019-01-10 シンフォニアテクノロジー株式会社 Electromagnetic brake
JP2019002516A (en) * 2017-06-16 2019-01-10 シンフォニアテクノロジー株式会社 Power control mechanism

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608533U (en) * 1983-06-30 1985-01-21 小倉クラツチ株式会社 Negative action electromagnetic brake

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS608533U (en) * 1983-06-30 1985-01-21 小倉クラツチ株式会社 Negative action electromagnetic brake

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101910848B1 (en) 2014-06-24 2018-10-23 가부시키가이샤 하모닉 드라이브 시스템즈 Non-excitation operative brake and motor with non-excitation operative brake
JP2018182250A (en) * 2017-04-21 2018-11-15 小倉クラッチ株式会社 Excitation device and non-excitation operative brake
JP2019002517A (en) * 2017-06-16 2019-01-10 シンフォニアテクノロジー株式会社 Electromagnetic brake
JP2019002516A (en) * 2017-06-16 2019-01-10 シンフォニアテクノロジー株式会社 Power control mechanism

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