JPH0679378A - Manufacture of armature used for electromagnetic clutch and the like - Google Patents
Manufacture of armature used for electromagnetic clutch and the likeInfo
- Publication number
- JPH0679378A JPH0679378A JP4257222A JP25722292A JPH0679378A JP H0679378 A JPH0679378 A JP H0679378A JP 4257222 A JP4257222 A JP 4257222A JP 25722292 A JP25722292 A JP 25722292A JP H0679378 A JPH0679378 A JP H0679378A
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- ring
- protrusions
- outer ring
- peripheral edge
- 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
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電磁クラッチ、電磁ブ
レーキ等に用いられるアーマチュアに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature used for electromagnetic clutches, electromagnetic brakes and the like.
【０００２】[0002]
【従来の技術】図５は、従来の電磁ブレーキを示してい
る。リング上のアーマチュア２は、定荷重形板ばね４に
連結し、該板ばね４は、アーマチュアハブ６に連結して
いる。ブレーキステータ８のコイル１０が通電される
と、コイル１０から発生する磁束によって、アーマチュ
ア２が板ばね４の弾力に抗してライニング１２に圧着
し、アーマチュアハブ６に結合する軸にブレーキがかか
る。コイル１０への通電が解除されると、磁束が消失
し、たわんだ板ばね４の復元力によりアーマチュア２が
瞬時にステータ８のライニング１２面から開放されて、
ブレーキ力がなくなる。前記アーマチュア２には、磁路
を断ちアーマチュア２のステータ８からの解放を早める
ためのエアギャップ１４が形成されている。2. Description of the Related Art FIG. 5 shows a conventional electromagnetic brake. The armature 2 on the ring is connected to a constant load leaf spring 4, which in turn is connected to an armature hub 6. When the coil 10 of the brake stator 8 is energized, the magnetic flux generated from the coil 10 causes the armature 2 to press against the lining 12 against the elastic force of the leaf spring 4, and the shaft connected to the armature hub 6 is braked. When the coil 10 is de-energized, the magnetic flux disappears, and the armature 2 is instantly released from the lining 12 surface of the stator 8 by the restoring force of the bent leaf spring 4.
The braking force is lost. The armature 2 is formed with an air gap 14 for cutting off the magnetic path and accelerating the release of the armature 2 from the stator 8.
【０００３】[0003]
【発明が解決しようとする問題点】図６に示すように、
アーマチュア２に溝１６を切削加工し、この溝１６にリ
ング１８を配置し、リング１８をスポット溶接により溝
１６の壁面に固着し、リング１８と溝１６の周面及び壁
面との間にエアギャップ１４を形成している。そのた
め、アーマチュアの加工が容易でなく、製作に時間がか
かるとともに、コスト高となる欠陥が存した。本発明は
上記欠陥を除去することを目的とするものである。Problems to be Solved by the Invention As shown in FIG.
A groove 16 is cut in the armature 2, a ring 18 is arranged in the groove 16, and the ring 18 is fixed to the wall surface of the groove 16 by spot welding. An air gap is provided between the ring 18 and the circumferential surface and the wall surface of the groove 16. 14 is formed. Therefore, the armature is not easy to process, it takes time to manufacture, and there is a defect that the cost becomes high. The present invention aims to eliminate the above defects.
【０００４】[0004]
【問題点を解決する手段】上記目的を達成するため、本
発明は、板素材を打ち抜いて内輪２０と外輪２２とを成
形し、前記内輪２０の円形の外周縁に、等間隔に複数
個、同一円線上に位置させて突起部３４，３６，３８を
形成し、前記外輪２２の前記内輪２０の外周縁と同じ形
状の内周縁に前記突起部３４，３６，３８の輪郭と略同
一の輪郭の凹入部４０，４２，４４を前記突起部３４，
３６，３８と同数形成し、前記凹入部４０，４２，４４
が前記突起部３４，３６，３８に対して回転方向に所定
角度ずれるとともに、前記凹入部４０，４２，４４が前
記突起部３４，３６，３８に対して放射軸線方向に所定
量Ｌ程ずれるように成し、上記内輪２０と外輪２２の打
ち抜き成形後、前記内輪２０を前記外輪２２に対して回
転方向にずらし、前記突起部３４，３６，３８を対応す
る前記凹入部４２，４４，４０に一致させ、しかる後
に、前記突起部３４，３６，３８を前記凹入部４２，４
４，４０に密嵌圧入し、前記内輪２０の外周縁と前記外
輪２２の内周縁との間に前記突起部前記突起部３４，３
６，３８と前記凹入部４２，４４，４０との間の放射軸
線方向のずれＬによるエアギャップｇを形成し、しかる
後に前記外輪２２と内輪２０との圧接部を溶接によって
接合したものである。In order to achieve the above object, according to the present invention, a plate material is punched to form an inner ring 20 and an outer ring 22, and a plurality of them are equidistantly formed on a circular outer peripheral edge of the inner ring 20. Protrusions 34, 36, 38 are formed on the same circle line, and the outline of the protrusions 34, 36, 38 is substantially the same as the outline of the protrusions 34, 36, 38 on the inner periphery of the outer ring 22 having the same shape as the outer periphery of the inner ring 20. The recesses 40, 42, 44 of the projection 34,
The same number as 36, 38 is formed, and the recessed portions 40, 42, 44 are formed.
Is displaced from the protrusions 34, 36, 38 by a predetermined angle in the rotation direction, and the recesses 40, 42, 44 are displaced from the protrusions 34, 36, 38 by a predetermined amount L in the radial axis direction. After punching the inner ring 20 and the outer ring 22, the inner ring 20 is displaced in the rotational direction with respect to the outer ring 22, and the protrusions 34, 36, 38 are formed in the corresponding recesses 42, 44, 40. The projections 34, 36, 38 are aligned with each other, and then the recesses 42, 4
4 and 40 are tightly fitted and press-fitted, and the protrusions 34 and 3 are provided between the outer peripheral edge of the inner ring 20 and the inner peripheral edge of the outer ring 22.
6, 38 and the recessed portions 42, 44, 40 are formed with an air gap g due to the deviation L in the radial axis direction, and thereafter the press-contacted portions of the outer race 22 and the inner race 20 are joined by welding. .
【０００５】[0005]
【実施例】以下に本発明の構成を図１乃至図３に示す実
施例を参照して詳細に説明する。図２を参照する。ま
ず、板部材から成る素材を通称「ファインブランキン
グ」と呼ばれるプレス打ち抜き法を用いて、同時にワン
パンチにて打ち抜き、内輪２０と外輪２２とを成形す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to the embodiments shown in FIGS. Please refer to FIG. First, using a press punching method commonly called "fine blanking" made of a plate member, punching is performed at the same time with one punch to form the inner ring 20 and the outer ring 22.
【０００６】内輪２０は、中央に円形の穴２４が形成さ
れ、外径部に、前記穴２４を中心とする円に沿った外周
縁２６が形成されている。前記内輪２０の外径部に３個
の半円形の凹入部２８，３０，３２が等間隔で形成され
ている。前記内輪２０の外径部の前記凹入部２８と３０
との間、３６と３２との間及び３２と２８との間のそれ
ぞれの中間には、半円形の突起部３４，３６，３８が等
間隔で形成されている。A circular hole 24 is formed in the center of the inner ring 20, and an outer peripheral edge 26 is formed in the outer diameter portion along a circle centered on the hole 24. Three semicircular recessed portions 28, 30, 32 are formed on the outer diameter portion of the inner ring 20 at equal intervals. The recessed portions 28 and 30 of the outer diameter portion of the inner ring 20.
Semicircular projections 34, 36, 38 are formed at equal intervals in the middle of the space between and, and between 36 and 32, and between 32 and 28, respectively.
【０００７】前記凹入部２８，３０，３２は互いに同一
寸法に設定され、また前記突起部３４，３６，３８も互
いに同一の寸法に設定されている。前記外輪２２の内径
部には、前記凹入部２８，３０．３２と接し、該凹入部
２８，３０，３２と同一寸法の半円形の凹入部４０，４
２，４４が等間隔で形成されている。The recesses 28, 30, 32 are set to have the same size, and the projections 34, 36, 38 are also set to have the same size. An inner diameter portion of the outer ring 22 is in contact with the recessed portions 28, 30.32 and has a semicircular recessed portion 40, 4 having the same size as the recessed portions 28, 30, 32.
2, 44 are formed at equal intervals.
【０００８】前記凹入部４０，４２，４４の半円形の輪
郭の曲率と前記突起部３４，３６，３８の半円形の輪郭
の大きさ及び曲率は略同一に設定されている。即ち、突
起部３４，３６，３８が凹入部４２，４４，４０に密嵌
可能な形状となっている。The curvatures of the semicircular contours of the recesses 40, 42 and 44 and the sizes and curvatures of the semicircular contours of the projections 34, 36 and 38 are set to be substantially the same. That is, the projections 34, 36, 38 are shaped so that they can be fitted tightly into the recesses 42, 44, 40.
【０００９】前記突起部３４，３６，３８の放射軸線４
６，４８，５０上の最大突出点Ｍは、前記凹入部４２，
４４，４０の放射軸線５２，５４，５６上の最もへこん
だ点Ｎに対し、放射方向に長さＬ程ずれている。Radiation axis 4 of the projections 34, 36, 38
The maximum protruding point M on 6, 48, 50 is the concave portion 42,
The points L, 44, 40 are displaced from the most concave point N on the radial axes 52, 54, 56 by a length L in the radial direction.
【００１０】即ち前記Ｎを通る前記円Ｓ１は、前記Ｍを
通る円Ｓ２に対して所定の長さＬ程小径に設定されてい
る。上記寸法差Ｌがアーマチュアの磁路遮断用エアギャ
ップの幅を構成する。前記外輪２２の外径部は、前記穴
２４の中心を中心とする円の線に沿った円形に構成され
ている。That is, the circle S1 passing through the N is set to be smaller than the circle S2 passing through the M by a predetermined length L. The dimensional difference L constitutes the width of the air gap for blocking the magnetic path of the armature. The outer diameter portion of the outer ring 22 is formed in a circular shape along a line of a circle centered on the center of the hole 24.
【００１１】前記外輪２２の内径部には、前記突起部３
４，３６，３８が打ち抜き跡によって、凹入部５８，６
０，６２が形成されている。６４，６６，６８は、アー
マチュア可動のための板ばね等の部材と連結するための
リベット又はボルト等用の穴である。At the inner diameter of the outer ring 22, the protrusion 3 is provided.
4, 36 and 38 are punched out, and the recessed portions 58 and 6 are formed.
0, 62 are formed. Reference numerals 64, 66 and 68 are holes for rivets or bolts for connecting with members such as leaf springs for moving the armature.
【００１２】次に、内輪２０を外輪２２から引き抜き、
図３に示すように内輪２０を外輪２２に対して６０度回
転させ、しかる後に突起部３４，３６，３８をそれぞれ
対応する凹入部４２，４４，４０に圧入する。この圧入
により、内外輪２０，２２との間に図１に示すようにギ
ャップｇが形成される。Next, the inner ring 20 is pulled out from the outer ring 22,
As shown in FIG. 3, the inner ring 20 is rotated 60 degrees with respect to the outer ring 22, and then the protrusions 34, 36 and 38 are press-fitted into the corresponding recessed portions 42, 44 and 40, respectively. By this press-fitting, a gap g is formed between the inner and outer rings 20, 22 as shown in FIG.
【００１３】このギャップｇは、前記円Ｓ１とＳ２との
寸法差Ｌによって生じる。凹入部２８，３０，３２は、
凹入部５８，６０，６２と合接して、それぞれリベット
又はボルト等の頭部を逃げるための穴部を構成する。次
に内輪２０と外輪２２の圧接部を点溶接などで接合す
る。以上の工程によって、エアギャップ付きのアーマチ
ュアが完成する。尚、突起部３４，３６，３８及び凹入
部５８，６０，６２の数は、特に図示する３個に限定さ
れるものでなく、４個ずつあるいはその他の数とするこ
とができる。尚、突起部とそれに対応する凹入部をそれ
ぞれ４個とした場合には、内輪と外輪に対して４５度回
転して、突起部を外輪の凹入部に圧入する。This gap g is caused by the dimensional difference L between the circles S1 and S2. The recessed portions 28, 30, 32 are
The recesses 58, 60, 62 are brought into contact with each other to form holes for escaping the heads of rivets or bolts, respectively. Next, the pressure-welded portions of the inner ring 20 and the outer ring 22 are joined by spot welding or the like. The armature with an air gap is completed by the above process. The numbers of the protrusions 34, 36, 38 and the recesses 58, 60, 62 are not particularly limited to the three shown in the drawing, but may be four or other numbers. When the number of protrusions and the number of corresponding recessed portions are four, the protrusions are pressed into the recessed portions of the outer ring by rotating 45 degrees with respect to the inner ring and the outer ring.
【００１４】尚、本発明の実施に際しては、図４に示す
ように内輪７０に半円形の凹入部７２，７４，７６を設
け、外輪７８に、前記凹入部７２，７４，７６に圧入す
る半円形の突起部８０，８２，８４を設けるようにして
も良い。この場合、内外輪７０，７８間にエアギャップ
ｇが形成されるように、突起部８０，８２，８４の成形
位置と凹入部７２，７４，７６の成形位置との間に内輪
７０の中心を通る放射軸線上に所定長さＬのずれを設け
ることは言うまでもない。In implementing the present invention, as shown in FIG. 4, the inner ring 70 is provided with semicircular recesses 72, 74 and 76, and the outer ring 78 is press-fitted into the recesses 72, 74 and 76. The circular protrusions 80, 82, 84 may be provided. In this case, the center of the inner ring 70 is placed between the molding positions of the protrusions 80, 82 and 84 and the molding positions of the recesses 72, 74 and 76 so that the air gap g is formed between the inner and outer rings 70 and 78. It goes without saying that a deviation of a predetermined length L is provided on the passing radiation axis.
【００１５】[0015]
【効果】本発明は上述の如く構成したので、（１）素材
に無駄が生じない、（２）エアギャップの寸法のコント
ロールができる、（３）コストが安く、製作時間を短く
することができる等の効果が存する。Since the present invention is configured as described above, (1) the material is not wasted, (2) the size of the air gap can be controlled, (3) the cost is low, and the manufacturing time can be shortened. There are effects such as.
【図１】アーマチュアの完成品の平面図である。FIG. 1 is a plan view of a completed armature.
【図２】素材を打ち抜いた状態の平面図である。FIG. 2 is a plan view showing a state where a material is punched out.
【図３】内輪を外輪に対して回転させた状態の平面図で
ある。FIG. 3 is a plan view showing a state where an inner ring is rotated with respect to an outer ring.
【図４】他の実施例を示す平面図である。FIG. 4 is a plan view showing another embodiment.
【図５】従来技術の一部切欠外観図である。FIG. 5 is a partially cutaway external view of a conventional technique.
【図６】従来のアーマチュアを示す断面図である。FIG. 6 is a cross-sectional view showing a conventional armature.
２ アーマチュア ４ 板ばね ６ アーマチュアハブ ８ ブレーキステータ １０ コイル １２ ライニング １４ エアギャップ １６ 溝 １８ リング ２０ 内輪 ２２ 外輪 ２４ 穴 ２６ 外周縁 ２８ 凹入部 ３０ 凹入部 ３２ 凹入部 ３４ 突起部 ３６ 突起部 ３８ 突起部 ４０ 凹入部 ４２ 凹入部 ４４ 凹入部 ４６ 放射軸線 ４８ 放射軸線 ５０ 放射軸線 ５２ 放射軸線 ５４ 放射軸線 ５６ 放射軸線 ５８ 凹入部 ６０ 凹入部 ６２ 凹入部 ６４ 穴 ６６ 穴 ６８ 穴 ７０ 内輪 ７２ 凹入部 ７４ 凹入部 ７６ 凹入部 ７８ 外輪 ８０ 突起部 ８２ 突起部 ８４ 突起部 2 Armature 4 Leaf spring 6 Armature hub 8 Brake stator 10 Coil 12 Lining 14 Air gap 16 Groove 18 Ring 20 Inner ring 22 Outer ring 24 Hole 26 Outer peripheral edge 28 Recessed part 30 Recessed part 32 Recessed part 34 Projection part 36 Projection part 38 Projection part 40 Recessed portion 42 Recessed portion 44 Recessed portion 46 Radial axis 48 Radial axis 50 Radial axis 52 Radial axis 54 Radial axis 56 Radial axis 58 Recessed portion 60 Recessed portion 62 Recessed portion 64 hole 66 hole 68 hole 70 Inner ring 72 Recessed portion 74 Recessed portion 78 Outer ring 80 Protrusion portion 82 Protrusion portion 84 Protrusion portion
Claims (2)
（２２）とを成形し、前記内輪（２０）の円形の外周縁
に、等間隔に複数個、同一円線上に位置させて突起部
（３４）（３６）（３８）を形成し、前記外輪（２２）
の前記内輪（２０）の外周縁と同じ形状の内周縁に前記
突起部（３４）（３６）（３８）の輪郭と略同一の輪郭
の凹入部（４０）（４２）（４４）を前記突起部（３
４）（３６）（３８）と同数形成し、前記凹入部（４
０）（４２）（４４）が前記突起部（３４）（３６）
（３８）に対して回転方向に所定角度ずれるとともに、
前記凹入部（４０）（４２）（４４）が前記突起部（３
４）（３６）（３８）に対して放射軸線方向に所定量Ｌ
程ずれるように成し、上記内輪（２０）と外輪（２２）
の打ち抜き成形後、前記内輪（２０）を前記外輪（２
２）に対して回転方向にずらし、前記突起部（３４）
（３６）（３８）を対応する前記凹入部（４２）（４
４）（４０）に一致させ、しかる後に、前記突起部（３
４）（３６）（３８）を前記凹入部（４２）（４４）
（４０）に密嵌圧入し、前記内輪（２０）の外周縁と前
記外輪（２２）の内周縁との間に前記突起部前記突起部
（３４）（３６）（３８）と前記凹入部（４２）（４
４）（４０）との間の放射軸線方向のずれＬによるエア
ギャップ（ｇ）を形成し、しかる後に前記外輪（２２）
と内輪（２０）との圧接部を溶接によって接合したこと
を特徴とする電磁クラッチ等に用いられるアーマチュア
の製作方法。1. A plate material is punched out to form an inner ring (20) and an outer ring (22), and a plurality of protrusions are formed on a circular outer peripheral edge of the inner ring (20) at equal intervals and on the same circle. Forming the parts (34) (36) (38), the outer ring (22)
The protrusions (40) (42) (44) having substantially the same contour as the contours of the protrusions (34) (36) (38) are formed on the inner peripheral edge of the same shape as the outer peripheral edge of the inner ring (20). Division (3
4) The same number as that of (36) and (38) is formed, and the recesses (4
0) (42) (44) are the protrusions (34) (36)
While deviating by a predetermined angle with respect to (38),
The recesses (40) (42) (44) are the protrusions (3).
4) A predetermined amount L in the radial axis direction with respect to (36) and (38)
The inner ring (20) and the outer ring (22) are formed so that they are displaced from each other.
After punching and forming the inner ring (20),
The protrusion (34) is displaced in the direction of rotation with respect to 2).
(36) (38) corresponding recesses (42) (4
4) Match with (40), and then the protrusion (3
4) Insert the recesses (42) (44) into the (36) (38)
It is press-fitted into (40), and the protrusions (34) (36) (38) and the recess ((38) are formed between the outer peripheral edge of the inner ring (20) and the inner peripheral edge of the outer ring (22). 42) (4
4) An air gap (g) is formed by a deviation L in the radial direction between the outer ring (22) and the outer ring (22).
A method for manufacturing an armature used for an electromagnetic clutch or the like, characterized in that a pressure-welded portion between the inner ring (20) and the inner ring (20) is joined by welding.
（７８）とを成形し、前記内輪（７０）の円形の外周縁
に、等間隔に複数個、同一円線上に位置させて凹入部
（７２）（７４）（７６）を形成し、前記外輪（７８）
の前記内輪（７０）の外周縁と同じ形状の内周縁に前記
凹入部（７２）（７４）（７６）の輪郭と略同一の輪郭
の突起部（８０）（８２）（８４）を前記凹入部（７
２）（７４）（７６）と同数形成し、前記突起部（８
０）（８２）（８４）が前記凹入部（７２）（７４）
（７６）に対して回転方向に所定角度ずれるとともに、
前記突起部（８０）（８２）（８４）が前記凹入部（７
２）（７４）（７６）に対して放射軸線方向に所定量Ｌ
程ずれるように成し、上記内輪（７０）と外輪（７８）
の打ち抜き成形後、前記内輪（７０）を前記外輪（７
８）に対して回転方向にずらし、前記凹入部（７２）
（７４）（７６）を対応する前記突起部（８０）（８
２）（８４）に一致させ、しかる後に、前記突起部（８
０）（８２）（８４）を前記凹入部（７２）（７４）
（７６）に密嵌圧入し、前記内輪（７０）の外周縁と前
記外輪（７８）の内周縁との間に前記突起部前記突起部
（８０）（８２）（８４）と前記凹入部（７２）（７
４）（７６）との間の放射軸線方向のずれＬによるエア
ギャップ（ｇ）を形成し、しかる後に前記外輪（７８）
と内輪（７０）との圧接部を溶接によって接合したこと
を特徴とする電磁クラッチ等に用いられるアーマチュア
の製作方法。2. A plate material is punched out to form an inner ring (70) and an outer ring (78), and a plurality of circular recesses are formed at equal intervals on a circular outer peripheral edge of the inner ring (70). The outer ring (78) is formed by forming the entry portions (72) (74) (76).
In the inner peripheral edge of the same shape as the outer peripheral edge of the inner ring (70), the protrusions (80) (82) (84) having substantially the same contour as the contours of the recessed portions (72) (74) (76) are recessed. Intro (7
2) The same number as (74) and (76) is formed, and the protrusions (8)
0) (82) (84) are the recessed portions (72) (74)
While being offset by a predetermined angle in the direction of rotation with respect to (76),
The protrusions (80), (82) and (84) have the recesses (7).
2) Predetermined amount L in the radial axis direction with respect to (74) and (76)
The inner ring (70) and the outer ring (78) are formed so as to be slightly displaced from each other.
After punching and forming the inner ring (70),
8) It is shifted in the rotational direction with respect to 8), and the concave portion (72)
(74) (76) corresponding protrusions (80) (8
2) Match with (84), and then the protrusion (8
0) (82) (84) into the recesses (72) (74)
It is press-fitted tightly into (76), and the protrusions (80) (82) (84) and the recessed portion (between the outer peripheral edge of the inner ring (70) and the inner peripheral edge of the outer ring (78). 72) (7
4) An air gap (g) is formed by a deviation L in the radial direction between the outer ring (78) and (76).
A method for manufacturing an armature used for an electromagnetic clutch or the like, characterized in that a pressure-welded portion between the inner ring (70) and the inner ring (70) is joined by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4257222A JPH0679378A (en) | 1992-09-01 | 1992-09-01 | Manufacture of armature used for electromagnetic clutch and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4257222A JPH0679378A (en) | 1992-09-01 | 1992-09-01 | Manufacture of armature used for electromagnetic clutch and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0679378A true JPH0679378A (en) | 1994-03-22 |
Family
ID=17303367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4257222A Pending JPH0679378A (en) | 1992-09-01 | 1992-09-01 | Manufacture of armature used for electromagnetic clutch and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0679378A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030004253A (en) * | 2002-12-10 | 2003-01-14 | 주식회사 엠씨테크 | Method For Manufacturing Armature Of Eletro Clutch Assembly |
| JP2012112430A (en) * | 2010-11-24 | 2012-06-14 | Ogura Clutch Co Ltd | Electromagnetic coupling device |
-
1992
- 1992-09-01 JP JP4257222A patent/JPH0679378A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030004253A (en) * | 2002-12-10 | 2003-01-14 | 주식회사 엠씨테크 | Method For Manufacturing Armature Of Eletro Clutch Assembly |
| JP2012112430A (en) * | 2010-11-24 | 2012-06-14 | Ogura Clutch Co Ltd | Electromagnetic coupling device |
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