JP3384230B2

JP3384230B2 - Non-excitation type electromagnetic brake

Info

Publication number: JP3384230B2
Application number: JP06026896A
Authority: JP
Inventors: 孝久藤原; 真弘村瀬
Original assignee: 神鋼電機株式会社
Priority date: 1996-02-23
Filing date: 1996-02-23
Publication date: 2003-03-10
Anticipated expiration: 2016-02-23
Also published as: KR970062386A; KR100407721B1; JPH09229103A; TW373208B

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、一般に電磁ブレー
キに関し、特に永久磁石を使用する無励磁作動型電磁ブ
レーキの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to electromagnetic brakes, and more particularly to improvements in non-excitation actuated electromagnetic brakes that use permanent magnets.

【０００２】[0002]

【従来の技術】従来の無励磁作動型電磁ブレーキの半体
正面図を図７（Ａ）に、図７（Ａ）のＡ−Ａ断面図とし
て、通電時の磁束の通路を示す半体側断面図を図７
（Ｂ）に、不通電時に永久磁石のみの磁束の通路を示す
半体側断面図を図８に示す。図７（Ａ）と（Ｂ）に示さ
れるように、この無励磁作動型電磁ブレーキの構成は、
コイル１を内蔵したマグネット組立体２と、ラジアルリ
ング形永久磁石３を内蔵したアーマチュア４と、ナイロ
ン系のゴム弾性体５を介してアーマチュア４と一体にさ
れたハブ６と、を有する。マグネット組立体２はボルト
８で固定フレーム９などに固定され、回転軸７には、ア
ーマチュア４がマグネット組立体２に吸着される場合
に、ハブ６の軸方向移動を阻止するための半径が異なる
部分の境界としての段部７ａがあり、ハブ６の外周には
ゴム弾性体５を固定するための段部７ｂが設けられる。
次に、この無励磁作動型電磁ブレーキの作動について説
明すると、コイル１に通電されない通常の状態では、図
８に示すように、永久磁石３の磁束Φ₁によりアーマチ
ュア４は、ゴム弾性体５の弾力に抗して、固定側のマグ
ネット組立体２の方へ吸着されギャップｇはなくなり、
ブレーキ作用により回転軸７は停止して保持される。コ
イル１に通電されると、図７（Ｂ）に示すように、マグ
ネット組立体２により、前記永久磁石３の磁束Φ₁と逆
向きの磁束Φ₂が形成されて吸着面で磁束が相殺され、
ゴム弾性体５の復元力によりギャップｇを生じてアーマ
チュア４は解放され、ブレーキ作用はなくなる。2. Description of the Related Art FIG. 7 (A) is a front view of a half body of a conventional non-excitation actuated electromagnetic brake, and FIG. 7 (A) is a sectional view taken along the line AA in FIG. Figure 7
FIG. 8 (B) is a half-body side sectional view showing the passage of the magnetic flux of only the permanent magnet when the power is not supplied. As shown in FIGS. 7A and 7B, the structure of this non-excitation actuated electromagnetic brake is
It has a magnet assembly 2 having a coil 1 built-in, an armature 4 having a radial ring permanent magnet 3 built-in, and a hub 6 integrated with the armature 4 via a nylon-based rubber elastic body 5. The magnet assembly 2 is fixed to a fixed frame 9 or the like with bolts 8, and the rotating shaft 7 has different radii for preventing axial movement of the hub 6 when the armature 4 is attracted to the magnet assembly 2. There is a step portion 7a as a boundary between the portions, and a step portion 7b for fixing the rubber elastic body 5 is provided on the outer periphery of the hub 6.
Next, the operation of the non-excitation actuated electromagnetic brake will be described. In a normal state in which the coil 1 is not energized, as shown in FIG. 8, the magnetic flux Φ ₁ of the permanent magnet 3 causes the armature 4 to move to the rubber elastic body 5. Against the elasticity, it is attracted toward the fixed side magnet assembly 2 and the gap g disappears,
The rotating shaft 7 is stopped and held by the braking action. When the coil 1 is energized, as shown in FIG. 7B, the magnet assembly ₂ forms a magnetic flux Φ _{2 in the} opposite direction to the magnetic flux Φ ₁ of the permanent magnet 3 to cancel the magnetic flux on the attracting surface. ,
Due to the restoring force of the rubber elastic body 5, a gap g is generated, the armature 4 is released, and the braking action is lost.

【０００３】[0003]

【発明が解決しようとする課題】上記のアーマチュア４
が解放される場合、ゴム弾性体５は軸方向、ラジアル方
向、よじり方向のいずれにも拘束されていないため、軸
方向に若干のよじれが生じ、そのため図８に示すように
アーマチュア４のＦ面（図９参照）の振れが大きくな
り、ギャップｇの間隔がアンバランスになって解放動作
が不安定になる。The above-mentioned armature 4
When the rubber elastic body 5 is released, the rubber elastic body 5 is not constrained in the axial direction, the radial direction, or the twisting direction, so that a slight twisting occurs in the axial direction. Therefore, as shown in FIG. (See FIG. 9) becomes large, and the gap g becomes unbalanced, and the releasing operation becomes unstable.

【０００４】[0004]

【課題を解決するための手段】本発明では、上記課題を
次の手段で解決した。モータ等により回転される回転軸
に対して相対回転可能に連結された固定フレームと、こ
の固定フレームにボルトなどで固定されコイルを内蔵し
たマグネット組立体と、前記コイルの励磁時に、このマ
グネット組立体と所定の幅の磁気間隙を保って軸方向に
対向し、ラジアルリング形永久磁石を内蔵したアーマチ
ュアと、このアーマチュアにナイロン系のゴム弾性体を
介して半径方向内方に一体に連結され、前記回転軸に止
めねじ等で固定されたハブと、を有する無励磁作動型電
磁ブレーキにおいて、請求項１の発明では、前記アーマ
チュアを支持するハブの前記アーマチュアの取付位置の
近くの軸方向外周に設けられた環状の溝と、この環状の
溝に挿入されて係合し、一部が切り欠かれた円弧状で断
面が弓形にされた弓形止め輪と、を備え、前記弓形止め
輪が前記コイルの励磁時において、前記アーマチュアに
前記マグネット組立体方向の方向に対し作用する少量の
予圧を与えるように構成した。また、請求項２に記載の
発明では、前記無励磁作動型電磁ブレーキにおいて、前
記アーマチュアを支持するハブの前記アーマチュアの取
付位置の近くの軸方向外周に、プッシュナットと、その
アーマチュアに接触する面に接合したリング状防振プレ
ートからなるプッシュナット組立体が外嵌され、当該プ
ッシュナット組立体が前記コイルの励磁時において前記
アーマチュアに前記マグネット組立体の方向に対し作用
する少量の予圧を与えるように構成した。また、請求項
３に記載の発明では、前記無励磁作動型電磁ブレーキに
おいて、ゴム弾性体は断面が平行四辺形の中空円錐環と
して成型され、ハブの外周には、この環状のゴム弾性体
の内周に軸方向外方から内方に向かって半径が小さくな
るように傾斜したテーパ部が設けられ、前記アーマチュ
アの内周には、このテーパ部に平行で、このテーパ部の
外径からゴム弾性体の厚さを減じた寸法より、やや大き
い内径を有する傾斜穴が明けられ、アーマチュアの内周
部とハブの外周部の間にゴム弾性体が弾性的に固定さ
れ、ハブのアーマチュアより僅か軸方向外側に段部が設
けられ、この段部に当該皿状部材の前記ハブとの嵌合用
開口部の周縁部を係合させ、当該皿状部材のフランジの
先端をアーマチュア４の端部に当てて皿状部材が挿入さ
れ、この皿状部材の外側にプッシュナットを備え、前記
皿状部材のフランジが前記コイルの励磁時において、ア
ーマチュアにマグネット組立体の方向に対し少量の予圧
を与えるとうに構成した。さらに、請求項４に記載の発
明では、前記無励磁作動型電磁ブレーキにおいて、ゴム
弾性体は断面が平行四辺形の中空円錐環として成型さ
れ、ハブの外周には、この環状のゴム弾性体の内周に軸
方向外方から内方に向かって半径が小さくなるように傾
斜したテーパ部が設けられ、前記アーマチュアの内周に
は、このテーパ部に平行で、このテーパ部の外径からゴ
ム弾性体の厚さを減じた寸法より、やや大きい内径を有
する傾斜穴が明けられ、アーマチュアの内周部とハブの
外周部の間にゴム弾性体が弾性的に固定され、ハブのア
ーマチュアより僅か軸方向外側に段部を設けられ、この
段部に当該皿状部材の前記ハブとの嵌合用開口部の周縁
部を係合させ、当該皿状部材のフランジの先端をアーマ
チュアの端面に当てて皿状部材が挿入され、この皿状部
材の外側に止め輪を配置し、当該止め輪の固定用環状溝
をハブに形成し、前記皿状部材が前記コイルの励磁時に
おいて、アーマチュアにマグネット組立体の方向に対し
少量の予圧を与えるように構成した。In the present invention, the above-mentioned problems are solved by the following means. A fixed frame connected to a rotary shaft rotated by a motor or the like so as to be rotatable relative to the fixed frame, a magnet assembly fixed to the fixed frame by a bolt or the like and having a coil built therein, and this magnet assembly when the coil is excited. And an axially opposed armature with a magnetic gap of a predetermined width, and a radial ring type permanent magnet built-in, and the armature is integrally connected radially inward via a nylon-based rubber elastic body, A non-excitation actuated electromagnetic brake having a hub fixed to a rotating shaft with a set screw or the like, wherein the hub supporting the armature is provided on an outer circumference in the axial direction near a mounting position of the armature. And an arcuate retaining ring that is inserted into and engaged with the annular groove and is partially cut out and has an arcuate cross section and an arcuate cross section. During excitation of the arcuate snap ring is the coil, and configured to provide a small amount of preload to act against the direction of the magnet assembly direction to the armature. Further, in the invention according to claim 2, in the non-excitation actuated electromagnetic brake, a push nut and a surface contacting the armature are provided on an outer periphery of a hub supporting the armature in the axial direction near a mounting position of the armature. A push nut assembly consisting of a ring-shaped anti-vibration plate joined to is externally fitted so that the push nut assembly provides a small amount of preload to the armature when the coil is excited. Configured to. According to the invention described in claim 3, in the non-excitation actuated electromagnetic brake, the rubber elastic body is molded as a hollow conical ring having a parallelogram in cross section, and the annular rubber elastic body is formed on the outer periphery of the hub. The inner circumference is provided with a taper portion that is inclined so that the radius becomes smaller from the outer side toward the inner side in the axial direction, and the inner circumference of the armature is parallel to the taper portion and the rubber portion from the outer diameter of the taper portion is provided. A slanted hole with a slightly larger inner diameter than the thickness of the elastic body is drilled, a rubber elastic body is elastically fixed between the inner circumference of the armature and the outer circumference of the hub, and is slightly smaller than the hub armature. A step portion is provided on the outer side in the axial direction, and the peripheral edge portion of the fitting opening portion of the dish-shaped member with the hub is engaged with the step portion, and the tip end of the flange of the dish-shaped member is set to the end portion of the armature 4. The plate-shaped member is inserted and A push nut to the outside of the dish-like member, at the time of excitation of the flange is the coil of the dish-shaped member, and sea urchin configuration given a small amount of preload to the direction of the magnet assembly to the armature. Further, in the invention according to claim 4, in the non-excitation actuated electromagnetic brake, the rubber elastic body is molded as a hollow conical ring having a parallelogram in section, and the annular rubber elastic body is formed on the outer periphery of the hub. The inner circumference is provided with a taper portion that is inclined so that the radius becomes smaller from the outer side toward the inner side in the axial direction, and the inner circumference of the armature is parallel to the taper portion and the rubber portion from the outer diameter of the taper portion is provided. A slanted hole with a slightly larger inner diameter than the thickness of the elastic body is drilled, a rubber elastic body is elastically fixed between the inner circumference of the armature and the outer circumference of the hub, and is slightly smaller than the hub armature. A step portion is provided on the outer side in the axial direction, the peripheral edge portion of the fitting opening portion of the dish-shaped member with the hub is engaged with the step portion, and the tip of the flange of the dish-shaped member is applied to the end surface of the armature. When the dish-shaped member is inserted, A retaining ring is arranged on the outer side of the dish-shaped member, and an annular groove for fixing the retaining ring is formed on the hub.When the dish-shaped member is excited by the coil, a small amount of preload is applied to the armature in the direction of the magnet assembly. Configured to give.

【０００５】[0005]

【発明の実施の形態】本発明による無励磁作動型電磁ブ
レーキの第１の実施の形態を示す半体側断面図を第１図
に示し、図７（Ｂ）と同じ部材には同じ符号を付し、異
なる点のみを説明する。ハブ１６の外周の、アーマチュ
ア４の取付位置に近い軸方向外周に環状の溝１６ａを設
け、この溝１６ａ内に正面図としての図２（Ａ）に示す
ように、異形中空円板の円環の一部が切り欠かれて中高
に曲げられ、側断面図としての図２（Ｂ）に示すよう
に、断面が弓形の止め輪１０（市販品あり）が係合さ
れ、アーマチュア４に軸線方向でマグネット組立体２側
に向けられる少量の予圧を与える。第２の実施の形態
は、半体側断面図としての図３に示すように、ハブ６の
外周の図１に示したのとほぼ同様な位置に、正面図とし
ての図４（Ａ）と側断面図としての図４（Ｂ）に示すよ
うな、中空円環板の内方の円周から外方に向かって所定
の長さの複数のくさび（楔）状の切欠きが設けられ、こ
の切欠き部分に沿って曲げられ、中高に突出した部分１
１ｃを有するプッシュナット組立体１１を圧入して、前
記と同様にアーマチュア４に少量の予圧を与える。プッ
シュナット組立体１１は、市販のプッシュナット１１ａ
の、アーマチュア４と接触する側の面にゴム製などのリ
ング状防振プレート１１ｂを接着したものである。第３
の実施の形態は、図５に示すように、ゴム弾性体１５は
断面が平行四辺形の中空円錐台形環として成型され、ハ
ブ２６の外周には、この環状のゴム弾性体１５に密着し
て係合するように、軸方向外方から内方に向かって半径
が小さくなるように傾斜したテーパ部２６ｂが設けられ
る。アーマチュア４の内周にも、このテーパ部２６ｂに
平行で、テーパ部２６ｂの外径からゴム弾性体１５の厚
さを減じた内径よりやや小さい内径を有する傾斜穴４ｂ
が明けられ、アーマチュア４の内周部とハブ２６の外周
との間にゴム弾性体１５が弾性的に圧着される。ハブ２
６のアーマチュア４よりの僅か軸方向外側に段部２６ａ
を設けて、フランジ１２ａの先端をアーマチュア４の軸
方向外側面に当てる。１２は皿状部材で、その外周部に
フランジ１２ａを有し、前記ハブ２６への嵌合用開口を
形成し、この嵌合用開口の周縁部を、この段部２６ａの
外側に当て、図３と図４に示したプッシュナット１１ａ
をハブ２６の外周に押し当て、アーマチュア４に所定の
予圧を与える。図４の実施の形態は、図６に示すよう
に、図５に示したものと殆ど同一であるが、前記のハブ
２６に相当するハブ３６の段部３６ａの軸方向外側に、
さらに環状の溝３６ｂを設けて、図５に示したプッシュ
ナット１１ａの代りに市販の止め輪１３を使用したもの
である。第１乃至第４の実施の形態では、コイル１に通
電されると、図７（Ｂ）の場合と同様にして、アーマチ
ュア４はマグネット組立体２から離れされブレーキ作用
が解放されるが、その際、前述したように、第１の実施
の形態では止め輪１０により、第２の実施の形態ではプ
ッシュ組立体１１により、また、第３の実施の形態では
プッシュナット１１ａと皿状部材１２により、更に、第
４の実施の形態では止め輪１３と皿状部材１２とによ
り、アーマチュア４には少量の予圧が与えられているこ
とにより、ゴム弾性体５が軸方向、ラジアル方向及びよ
じり方向の動きに拘束を受けているために、図９に示す
ようなアーマチュア４のＦ面の振れを生ずることがな
く、規定のギャップｇがバランス良く保持される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A half-body side sectional view showing a first embodiment of a non-excitation actuated electromagnetic brake according to the present invention is shown in FIG. 1, and the same members as those in FIG. However, only different points will be described. An annular groove 16a is formed on the outer circumference of the hub 16 in the axial direction near the mounting position of the armature 4, and in this groove 16a, as shown in FIG. 2 is cut out and bent to a middle height, and as shown in FIG. 2B as a side sectional view, a retaining ring 10 (commercially available) having an arcuate cross section is engaged with the armature 4 in the axial direction. Provides a small amount of preload directed to the magnet assembly 2 side. In the second embodiment, as shown in FIG. 3 as a half-body side sectional view, the outer circumference of the hub 6 is located at a position substantially similar to that shown in FIG. As shown in FIG. 4 (B) as a sectional view, a plurality of wedge-shaped notches each having a predetermined length are provided from the inner circumference of the hollow annular plate toward the outer side. Part 1 that is bent along the notch and protrudes to a middle height
The push nut assembly 11 having 1c is press-fitted to apply a small amount of preload to the armature 4 as before. The push nut assembly 11 is a commercially available push nut 11a.
The ring-shaped anti-vibration plate 11b made of rubber or the like is adhered to the surface of the side contacting the armature 4. Third
In the embodiment, as shown in FIG. 5, the rubber elastic body 15 is molded as a hollow truncated cone ring having a parallelogram in cross section, and the outer periphery of the hub 26 is in close contact with the annular rubber elastic body 15. For engagement, a tapered portion 26b is provided that is inclined so that the radius decreases from the outer side to the inner side in the axial direction. Also on the inner circumference of the armature 4, an inclined hole 4b which is parallel to the tapered portion 26b and has an inner diameter slightly smaller than the inner diameter obtained by subtracting the thickness of the rubber elastic body 15 from the outer diameter of the tapered portion 26b.
The rubber elastic body 15 is elastically pressure-bonded between the inner peripheral portion of the armature 4 and the outer peripheral portion of the hub 26. Hub 2
6 has a step 26a slightly axially outward from the armature 4
Is provided and the tip of the flange 12a is brought into contact with the axially outer side surface of the armature 4. Reference numeral 12 denotes a dish-shaped member, which has a flange 12a on the outer periphery thereof to form a fitting opening for the hub 26, and the peripheral edge of the fitting opening is brought into contact with the outside of the stepped portion 26a. Push nut 11a shown in FIG.
Is pressed against the outer circumference of the hub 26 to apply a predetermined preload to the armature 4. As shown in FIG. 6, the embodiment shown in FIG. 4 is almost the same as that shown in FIG. 5, except that the step portion 36a of the hub 36 corresponding to the hub 26 is axially outside.
Further, an annular groove 36b is provided, and a commercially available retaining ring 13 is used instead of the push nut 11a shown in FIG. In the first to fourth embodiments, when the coil 1 is energized, the armature 4 is separated from the magnet assembly 2 and the braking action is released as in the case of FIG. 7B. At this time, as described above, by the retaining ring 10 in the first embodiment, by the push assembly 11 in the second embodiment, and by the push nut 11a and the dish-shaped member 12 in the third embodiment. Furthermore, in the fourth embodiment, a small amount of preload is applied to the armature 4 by the retaining ring 13 and the dish-shaped member 12, so that the rubber elastic body 5 moves in the axial direction, the radial direction and the twisting direction. Since the movement is restricted, the swing of the F surface of the armature 4 as shown in FIG. 9 does not occur, and the prescribed gap g is maintained in a well-balanced manner.

【０００６】[0006]

【発明の効果】本発明の無励磁作動形電磁ブレーキは前
記のように構成されるから、次に示すような優れた効果
を有する。（１）請求項１に記載の発明によると、 (1-1)ゴム弾性体がアーマチュアに対しマグネット組立
体方向に移動する方向の少量の予圧与える構成のため、
コイルを励磁しアーマチュアをマグネット組立体から
解放する場合アーマチュアの面振れを防止でき、ブレー
キ解放動作特性が安定する。ブレーキ解放動作時に永
久磁石による磁束を相殺するコイルへの印加電圧の範囲
が安定する。 (1-2)前記ゴム弾性体の少量の予圧を与える状態を維持
するための弓形止め輪の構成が簡単で、その固定部材
（例えば、ボルト）が不要となる。（２）請求項２に記載の発明によると、前記(1-1)項
、の効果に加えて、 (2-1)プッシュナットの有する特性状固定用溝をハブに
形成する必要がなく、ハブへの固定箇所の調整が容易と
なる。 (2-2)リング状防振プレートの緩衝作用により、半波、
全波のようなリップル電源仕様においてもアーマチュア
のビビリ音の発生がなくなる。（３）請求項３に記載の発明によると、前記(1-1)項
、の効果に加えて、 (3-1)フランジ部付皿状部材をプッシュナットとアーマ
チュアとの間に介在させたから、アーマチュアの予圧を
受ける箇所が回転軸の軸心から離れ、無励磁作動型電磁
ブレーキが不動作時のアーマチュアの振れを的確に防止
できる。 (3-2)フランジ部付皿状部材の固定位置がプッシュナッ
トにて最適に調整できる。（４）請求項４に記載の発明によると、前記(1-1)項
、、(3-1)の効果に加えて、フランジ部付皿状部材
の固定機構が簡素化できる。Since the non-excitation actuated electromagnetic brake of the present invention is constructed as described above, it has the following excellent effects. (1) According to the invention described in claim 1, (1-1) because the rubber elastic body is configured to give a small amount of preload to the armature in the direction of moving to the magnet assembly,
When the coil is excited to release the armature from the magnet assembly, the armature can be prevented from wobbling and the brake release operation characteristics are stabilized. The range of voltage applied to the coil that cancels the magnetic flux of the permanent magnet during the brake release operation is stabilized. (1-2) The structure of the arched retaining ring for maintaining the state where a small amount of preload is applied to the rubber elastic body is simple, and its fixing member (for example, bolt) is unnecessary. (2) According to the invention of claim 2, in addition to the effect of (1-1) above, (2-1) there is no need to form the characteristic fixing groove of the push nut in the hub, Adjustment of the fixing point to the hub becomes easy. (2-2) Due to the buffering action of the ring-shaped anti-vibration plate, half-wave,
Even in the ripple power supply specifications such as full wave, the chattering noise of the armature is eliminated. (3) According to the invention of claim 3, in addition to the effect of (1-1), (3-1) the dish-shaped member with the flange portion is interposed between the push nut and the armature. , The part of the armature that receives preload is separated from the axis of the rotary shaft, and the runout of the armature can be accurately prevented when the non-excitation actuated electromagnetic brake is inoperative. (3-2) The fixed position of the dish-shaped member with flange can be optimally adjusted with a push nut. (4) According to the invention described in claim 4, in addition to the effects of the items (1-1) and (3-1), the fixing mechanism of the flange-shaped dish-shaped member can be simplified.

[Brief description of drawings]

【図１】本発明による無励磁作動型電磁ブレーキの第１
の実施の形態の半体側断面図である。FIG. 1 is a first non-excitation actuated electromagnetic brake according to the present invention.
It is a half body side sectional view of an embodiment of.

【図２】図１に使用される弓形止め輪を示し、同図
（Ａ）は正面図、同図（Ｂ）は側断面図である。2A and 2B show an arcuate retaining ring used in FIG. 1, where FIG. 2A is a front view and FIG. 2B is a side sectional view.

【図３】本発明による第２の実施の形態の半体側断面図
である。FIG. 3 is a half body side sectional view of a second embodiment according to the present invention.

【図４】図３に使用されるプッシュナット組立体を示
し、同図（Ａ）は正面図を、同図（Ｂ）は側断面図であ
る。4A and 4B show a push nut assembly used in FIG. 3, in which FIG. 4A is a front view and FIG. 4B is a side sectional view.

【図５】本発明による第３の実施の形態の半体側断面図
である。FIG. 5 is a half body side sectional view of a third embodiment according to the present invention.

【図６】本発明による第４の実施の形態の半体側断面図
である。FIG. 6 is a half-side sectional view of a fourth embodiment according to the present invention.

【図７】従来の無励磁作動型電磁ブレーキを示し、同図
（Ａ）は半体正面図、同図（Ｂ）はコイルに通電された
場合における同図（Ａ）のＡ−Ａ断面図である。7A and 7B show a conventional non-excitation actuated electromagnetic brake, where FIG. 7A is a front view of a half body, and FIG. 7B is a sectional view taken along line AA of FIG. 7A when a coil is energized. Is.

【図８】従来の無励磁作動型電磁ブレーキを示し、コイ
ルに不通電の場合における図７（Ａ）のＡ−Ａ断面図で
ある。FIG. 8 is a cross-sectional view taken along the line AA of FIG. 7A showing a conventional non-excitation actuated electromagnetic brake when the coil is not energized.

【図９】従来の無励磁作動型電磁ブレーキに通電した時
のアーマチュアの動きを示す説明図である。FIG. 9 is an explanatory diagram showing the movement of the armature when the conventional non-excitation actuated electromagnetic brake is energized.

[Explanation of symbols]

１：コイル２：マグネット組立体３：ラジアルリング形永久磁石４：アーマチュア４ｂ：アーマチュアに形成された傾斜穴５、１５：ゴム弾性体６、１６、２６、３６：ハブ７：回転軸８：ボルト９：固定フレーム１０：弓形止め輪１１：プッシュナット組立体１１ａ：プッシュナット１１ｂ：リング状防振プレート１２：皿状部材１２ａ：皿状部材のフランジ１３、１５：止め輪１６ａ：環状の溝２６ａ：ハブに形成した段部２６ｂ：ハブに形成されたテーパ部３６ａ：ハブに形成した段部３６ｂ：止め輪固定用環状溝３６ｃ：ハブに形成したテーパ部ｇ：磁気間隙（ギャップ） 1: coil 2: Magnet assembly 3: Radial ring type permanent magnet 4: Armature 4b: inclined hole formed in the armature 5, 15: Rubber elastic body 6, 16, 26, 36: Hub 7: Rotation axis 8: Bolt 9: Fixed frame 10: Bow retaining ring 11: Push nut assembly 11a: Push nut 11b: Ring-shaped anti-vibration plate 12: Plate-shaped member 12a: Flange of dish-shaped member 13, 15: Retaining ring 16a: annular groove 26a: Step portion formed on the hub 26b: Tapered portion formed on the hub 36a: Step formed on the hub 36b: Annular groove for fixing snap ring 36c: Tapered portion formed on hub g: Magnetic gap

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.⁷，ＤＢ名) F16D 55/00 F16D 65/21 F16D 27/112 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16D 55/00 F16D 65/21 F16D 27/112

Claims

(57) [Claims]

1. A rotary shaft (7) rotated by a motor or the like.
A fixed frame (9) rotatably connected to the fixed frame
When, the fixed frame (9) on the bolt (8) is fixed in such a coil built-in magnet assembly the (1) (2)
When the coil (1) is excited, the magnet assembly (2) is axially opposed to the magnet assembly (2) with a magnetic gap (g) having a predetermined width, and the armature (3) having a radial ring type permanent magnet is built in. 4) and a hub ( 16 ) integrally connected to the armature (4) inward in the radial direction via a nylon rubber elastic body (5) and fixed to the rotating shaft (7) with a set screw or the like. When,
In a non-excitation actuated electromagnetic brake having: a hub (16) supporting the armature (4), an annular groove (16a) provided on an outer circumference in the axial direction near a mounting position of the armature (4); An arcuate retaining ring (1) which is inserted into and engaged with the annular groove (16a) and has a partially cutout arc shape and an arc-shaped cross section.
0) and, wherein the arcuate snap ring (10) of said coil (1)
During excitation, non-excitation type electromagnetic brake, characterized in that providing a small amount of preload to act against the direction of the magnet assembly (2) to the armature (4).

2. A rotating shaft (7) rotated by a motor or the like.
A fixed frame (9) rotatably connected to the fixed frame
And fix it to this fixed frame (9) with bolts (8) etc.
And a magnet assembly (2) containing a coil (1)
And this magnet assembly when the coil (1) is excited.
(2) and the magnetic gap (g) of a predetermined width are kept and they are paired in the axial direction.
Facing, an arm incorporating a radial ring type permanent magnet (3)
And Mature (4), the rubber elastic body nylon in the armature (4)
It is integrally connected inward in the radial direction via (5),
The hub (6) fixed to the rolling shaft (7) with a set screw, etc.
With the non-excitation type electromagnetic brake, near the axially outer periphery of the mounting position of the armature (4) of the hub (6) supporting the armature (4), flop
On the schnut (11a) and its armature (4)
Ring-shaped anti-vibration plate (11b) joined to the contact surface
Consisting push nut assembly (11) is fitted, those
The push nut assembly (11) is attached to the coil (1).
During excitation, the magnet is attached to the armature (4).
Giving a small amount of preload acting in the direction of the assembly (2)
Non-excitation type electromagnetic brake, characterized in Rukoto.

3. A rotary shaft (7) rotated by a motor or the like.
A fixed frame (9) rotatably connected to the fixed frame
And fix it to this fixed frame (9) with bolts (8) etc.
And a magnet assembly (2) containing a coil (1)
And this magnet assembly when the coil (1) is excited.
(2) and the magnetic gap (g) of a predetermined width are kept and they are paired in the axial direction.
Armor with built-in facing radial ring type permanent magnet (3)
And Chua (4), the rubber elastic body nylon in the armature (4) (1
5) is connected integrally inward in the radial direction via
A hub (26) fixed to the shaft (7) with a set screw, etc.
In the non-excitation actuated electromagnetic brake, the rubber elastic body (15) is molded as a hollow conical ring having a parallelogram in cross section, and the inner periphery of the annular rubber elastic body (15) is formed on the outer periphery of the hub (26). Taper part (26b) inclined so that the radius decreases from the outer side to the inner side in the axial direction
Is provided on the inner periphery of the armature (4) in parallel with the tapered portion (26b), and the tapered portion (26b) is provided.
An inclined hole (4b) having a slightly larger inner diameter than the outer diameter of the rubber elastic body (15) is formed, and the inner peripheral portion of the armature (4) and the outer peripheral portion of the hub (26) are formed. A rubber elastic body (15) is elastically fixed between them, and a step portion (26a) is provided slightly outside the armature (4) of the hub (26) in the axial direction, and the plate is attached to the step portion (26a).
Of the opening for fitting of the member (12) with the hub (26)
The dish-shaped member (12) is inserted by engaging the peripheral edge portion and applying the tip of the flange (12a) of the dish-shaped member (12) to the end surface of the armature (4 ).
The dish-shaped member is provided with a push nut (11a) on the outside.
The flange (12a) of (12) energizes the coil (1).
In磁時, magnetic Tsu door assembly to the armature (4)
A non-excitation actuated electromagnetic brake, which is characterized by applying a small amount of preload in the direction (2) .

4. A rotary shaft (7) rotated by a motor or the like.
A fixed frame (9) rotatably connected to the fixed frame
And fix it to this fixed frame (9) with bolts (8) etc.
And a magnet assembly (2) containing a coil (1)
And this magnet assembly when the coil (1) is excited.
(2) and the magnetic gap (g) of a predetermined width are kept and they are paired in the axial direction.
Armor with built-in facing radial ring type permanent magnet (3)
And Chua (4), the rubber elastic body nylon in the armature (4) (1
5) is connected integrally inward in the radial direction via
A hub (26) fixed to the shaft (7) with a set screw, etc.
In the non-excitation actuated electromagnetic brake, the rubber elastic body (15) has a hollow conical ring with a parallelogram cross section.
And the outer circumference of the hub (36).
From the outer side to the inner side of the elastic body (15) in the axial direction.
Taper (36c) that is inclined so that the radius becomes smaller
Is provided on the inner circumference of the armature (4).
This taper part (36c) is parallel to the taper part (36c).
The outer diameter of the rubber elastic body (15) minus the thickness
, The tilted hole (4b) with a slightly larger inner diameter is opened.
The inner circumference of the armature (4) and the outer circumference of the hub (36)
A rubber elastic body (15) is elastically fixed between the two parts,
A step slightly axially outside the armature (4) of (36)
The plate (36a) is provided, and the plate is attached to the step (36a).
Of the opening for fitting the member (12) with the hub (36)
The flange of the dish-shaped member (12) is engaged with the peripheral portion.
Apply the tip of (12a) to the end face of the armature (4)
The dish-shaped member (12) is inserted, and the dish-shaped member (12) is
The retaining ring (13) is arranged outside and the retaining ring (13)
The fixing annular groove (35b) is formed in the hub (36), and
The dish-shaped member (12) is placed when the coil (1) is excited.
The magnet assembly (2) to the armature (4)
Non-excitation operation characterized by applying a small amount of preload to the direction
Dynamic electromagnetic brake.