JP2011012711A - Electromagnetic clutch and electromagnetic brake - Google Patents

Electromagnetic clutch and electromagnetic brake Download PDF

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JP2011012711A
JP2011012711A JP2009155463A JP2009155463A JP2011012711A JP 2011012711 A JP2011012711 A JP 2011012711A JP 2009155463 A JP2009155463 A JP 2009155463A JP 2009155463 A JP2009155463 A JP 2009155463A JP 2011012711 A JP2011012711 A JP 2011012711A
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rotor
armature
driven shaft
drive shaft
electromagnetic
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Hirotsugu Mishina
博嗣 三品
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Imasen Electric Industrial Co Ltd
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Imasen Electric Industrial Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic clutch and an electromagnetic brake capable of restricting displacement of a driving shaft and a driven shaft when transmitting the rotation torque of the driving shaft to the driven shaft.SOLUTION: In an electromagnetic clutch and an electromagnetic brake, the concentricity of a driving shaft 1 and a driven shaft 2 with each other can be secured by forming a recess 11 in a friction surface of a rotor 3 fixed to the driving shaft 1, forming a conical projection 12 in a friction surface of an armature 4 fixed to the driven shaft 2, and fitting the recess 11 and the conical projection 12 to each other when the friction surfaces of the rotor 3 and the armature 4 are brought in contact with each other.

Description

本発明は、2軸間の回転トルクを伝達、非伝達する電磁クラッチ及び電磁ブレーキに関するものである。   The present invention relates to an electromagnetic clutch and an electromagnetic brake that transmit and do not transmit rotational torque between two shafts.

従来の電磁クラッチ及び電磁ブレーキについては、例えば特許文献1に記載されたものがある。特許文献1に記載の電磁クラッチ及び電磁ブレーキは、駆動源に連結された駆動軸と、駆動軸に対向して設けられた被動軸と、駆動軸に装着された環状の回転主体と、回転主体に固着された一方の摩擦板と、回転主体と径方向並びに軸方向の空隙を隔てて設けられた環状の固定子と、駆動軸を支承するベアリングと、固定子に内蔵された一方の励磁コイルと、被動軸に固定されたハブと、一方の摩擦板に対し軸方向に所定空隙を隔てて設けられハブと板ばねを介して一体化されている一方のアーマチュアと、環状の固定主体と、固定主体に内蔵された他方の励磁コイルと、固定主体に固定された他方の摩擦板と、被動軸を支承するベアリングと、他方の摩擦板に軸方向の空隙を隔てて設けられハブと板ばねを介して固定される他方のアーマチュアを有しており、駆動源により駆動軸に伝達された回転トルクは回転子にも伝達され、被動軸に回転トルクを伝達する場合、一方の励磁コイルに電流を流して磁束を発生させることで、一方のアーマチュアが励磁コイルの吸引力によって板ばねの弾性力に抗して回転主体に吸引されて移動し、一方の摩擦板に接合して連結され、駆動源より駆動軸を介して伝達された回転トルクは、回転主体から一方の摩擦板、アーマチュア、板ばねを介して被動軸に伝達される。回転トルクが伝達されている被動軸を停止させる場合には、一方の励磁コイルの電流を遮断して励磁を解くと同時に、他方の励磁コイルに電流を流して磁束を発生させることで、他方のアーマチュアが磁束の吸引力により板ばねの弾性力に抗して他方の摩擦板に接合して連結され、固定主体により被動軸の回転が停止されるものである。   Conventional electromagnetic clutches and electromagnetic brakes are described in, for example, Patent Document 1. An electromagnetic clutch and an electromagnetic brake described in Patent Document 1 include a drive shaft connected to a drive source, a driven shaft provided to face the drive shaft, an annular rotating body mounted on the driving shaft, and a rotating body. One friction plate, a rotating stator, a ring-shaped stator provided with a radial and axial gap therebetween, a bearing for supporting the drive shaft, and one excitation coil incorporated in the stator. A hub fixed to the driven shaft, one armature provided with a predetermined gap in the axial direction with respect to one friction plate and integrated with the hub and a leaf spring, an annular fixed body, The other exciting coil built in the fixed main body, the other friction plate fixed to the fixed main body, the bearing for supporting the driven shaft, and the hub and leaf spring provided in the other friction plate with an axial gap therebetween The other armature fixed through The rotational torque transmitted to the drive shaft by the drive source is also transmitted to the rotor, and when transmitting the rotational torque to the driven shaft, current is passed through one excitation coil to generate magnetic flux. Then, one armature is attracted and moved by the rotating body against the elastic force of the leaf spring by the attractive force of the exciting coil, joined and connected to one friction plate, and transmitted from the drive source through the drive shaft. The rotational torque thus transmitted is transmitted from the rotating body to the driven shaft through one friction plate, armature, and leaf spring. When stopping the driven shaft to which the rotational torque is transmitted, the current of one excitation coil is interrupted to release the excitation, and at the same time, the current is passed to the other excitation coil to generate a magnetic flux. The armature is joined and connected to the other friction plate against the elastic force of the leaf spring by the attractive force of the magnetic flux, and the rotation of the driven shaft is stopped by the fixed body.

実開昭55−173731号公報Japanese Utility Model Publication No. 55-173731

上述した電磁クラッチ及び電磁ブレーキは、駆動軸及び被動軸にベアリングを装着しており、駆動軸及び被動軸の同心度が確保されているため、回転トルクの伝達する際に駆動軸及び被動軸のずれが抑えられるという利点があるが、高価であるベアリングを設けることはコストアップにつながるという問題点があった。   In the electromagnetic clutch and the electromagnetic brake described above, bearings are mounted on the drive shaft and the driven shaft, and the concentricity of the drive shaft and the driven shaft is secured. Therefore, when the rotational torque is transmitted, the drive shaft and the driven shaft Although there is an advantage that the deviation can be suppressed, there is a problem that providing an expensive bearing leads to an increase in cost.

本発明は、上述した課題を解決するためになされたものであり、ベアリングを設けることなく駆動軸及び被動軸の同心度を確保することができる電磁クラッチ及び電磁ブレーキを提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to provide an electromagnetic clutch and an electromagnetic brake that can ensure the concentricity of the drive shaft and the driven shaft without providing a bearing. .

上記課題を解決するために、請求項1に記載の電磁クラッチ及び電磁ブレーキは、駆動源に連結された駆動軸と、前記駆動軸に対向して設けられた被動軸と、前記駆動軸に固定され一体的に転回するロータと、前記ロータに対向して設けられ軸方向に可動可能に被動軸と固定されたアーマチュアと、前記アーマチュアを前記ロータと離間する方向に付勢する付勢手段と、前記アーマチュアを前記ロータ側へ前記付勢手段の付勢力に抗して引き寄せる吸引力を発生させる励磁コイルを備え、前記ロータの前記アーマチュアと接触する摩擦面に凹部を形成し、前記アーマチュアの前記ロータと接触する摩擦面に前記凹部と嵌合可能な凸部を形成したことを特徴とする。   In order to solve the above-mentioned problem, an electromagnetic clutch and an electromagnetic brake according to claim 1 are fixed to the drive shaft, a driven shaft connected to a drive source, a driven shaft provided to face the drive shaft, and the drive shaft. A rotor that is integrally rotated, an armature that is provided facing the rotor and is fixed to the driven shaft so as to be movable in the axial direction, and a biasing means that biases the armature in a direction away from the rotor, An excitation coil that generates an attractive force that draws the armature toward the rotor against the urging force of the urging means; and a concave portion is formed on a friction surface that contacts the armature of the rotor, and the rotor of the armature A convex portion that can be fitted to the concave portion is formed on the friction surface that comes into contact with the concave portion.

請求項1の電磁クラッチ及び電磁ブレーキは、駆動軸に固定されたロータ及び被動軸に固定されたアーマチュアの接触時に、アーマチュアの摩擦面に形成された凸部が、ロータの摩擦面に形成された凹部に嵌合するため、ベアリングを設けることなく駆動軸及び被動軸の同心度を確保することができ、コストを低減させることができる。   In the electromagnetic clutch and the electromagnetic brake according to claim 1, the convex portion formed on the friction surface of the armature is formed on the friction surface of the rotor when the rotor fixed to the drive shaft and the armature fixed to the driven shaft are in contact. Since it fits in a recessed part, the concentricity of a drive shaft and a driven shaft can be ensured, without providing a bearing, and cost can be reduced.

電磁クラッチの分解斜視図Disassembled perspective view of electromagnetic clutch 電磁クラッチの部分断面図Partial sectional view of electromagnetic clutch ロータ3の斜視図Perspective view of rotor 3 アーマチュア4の斜視図Perspective view of armature 4

本発明の一実施形態である電磁クラッチについて図1から図4を参照して説明する。   An electromagnetic clutch according to an embodiment of the present invention will be described with reference to FIGS.

本発明の電磁クラッチは、図1に示すように、駆動源に連結された駆動軸1と、駆動軸1と対向して設けられた被動軸2と、駆動軸1に固定されたロータ3と、ロータ3と対向して設けられ被動軸2に固定されたアーマチュア4と、アーマチュア4をロータ3と離間する方向に付勢する永久磁石8(付勢手段)と、アーマチュア4を永久磁石8の磁力(付勢力)に抗してロータ3側に吸引する吸引力を発生させる励磁コイル5を備えている。   As shown in FIG. 1, the electromagnetic clutch of the present invention includes a drive shaft 1 connected to a drive source, a driven shaft 2 provided facing the drive shaft 1, and a rotor 3 fixed to the drive shaft 1. The armature 4 provided to face the rotor 3 and fixed to the driven shaft 2, the permanent magnet 8 (biasing means) for biasing the armature 4 in the direction away from the rotor 3, and the armature 4 for the permanent magnet 8. An exciting coil 5 is provided that generates an attractive force that is attracted to the rotor 3 against the magnetic force (biasing force).

ロータ3は、駆動軸1と一体的に固定され、アーマチュア4と接触する摩擦面3aを有している。この摩擦面3aの中心部には凹部11が形成されており、後述するアーマチュア4の摩擦面4aに形成された凸部12と嵌合可能となっている。   The rotor 3 is fixed integrally with the drive shaft 1 and has a friction surface 3 a that contacts the armature 4. A concave portion 11 is formed at the center of the friction surface 3a, and can be fitted to a convex portion 12 formed on the friction surface 4a of the armature 4 described later.

アーマチュア4は、軸方向に可動可能に被動軸2に固定され、ロータ3と接触する摩擦面4aを有している。この摩擦面4aの中心部には円錐状の凸部12が形成されており、ロータ3の摩擦面3aに形成された凹部11と嵌合可能となっている。なお、本実施例ではロータ3側に凹部、アーマチュア4側に凸部を設けたが、ロータ3側に凸部、アーマチュア4側に凹部を設けてもよく、また凸部は円錐状以外の形状にしてもよい。   The armature 4 is fixed to the driven shaft 2 so as to be movable in the axial direction, and has a friction surface 4 a that contacts the rotor 3. A conical convex portion 12 is formed at the center of the friction surface 4 a and can be fitted to the concave portion 11 formed on the friction surface 3 a of the rotor 3. In this embodiment, the concave portion is provided on the rotor 3 side and the convex portion is provided on the armature 4 side. However, the convex portion may be provided on the rotor 3 side, and the concave portion may be provided on the armature 4 side. It may be.

永久磁石8は、後述するカバー9に形成された孔9aに装着され、アーマチュア4を引き付けてロータ3と離間するように常時付勢している。   The permanent magnet 8 is mounted in a hole 9 a formed in a cover 9 described later, and is always biased so as to attract the armature 4 and separate from the rotor 3.

励磁コイル5は、コイルボビン10に巻回され、中心部にロータ3の円筒部が挿入されている。この励磁コイル5に通電すると磁束が発生し、アーマチュア4をロータ3側に引き寄せられる吸引力が生じる。励磁コイル5の通電を停止すると磁束がなくなり、アーマチュア4は永久磁石8の磁力により引き戻され再びロータ3と離間される。   The exciting coil 5 is wound around a coil bobbin 10 and the cylindrical portion of the rotor 3 is inserted in the center. When the exciting coil 5 is energized, a magnetic flux is generated, and an attractive force that attracts the armature 4 toward the rotor 3 is generated. When energization of the exciting coil 5 is stopped, the magnetic flux disappears, and the armature 4 is pulled back by the magnetic force of the permanent magnet 8 and again separated from the rotor 3.

駆動軸1は、ケース6に形成された孔6aに挿通して固定されており、駆動軸1に固定されたロータ3、ロータ3と対向して位置するアーマチュア4、ロータ3の円筒部が挿通されている励磁コイル5がケース6内に収容されている。被動軸2は、ブッシュ7とカバー9を挿通しており、ブッシュ7は、被動軸2が運動する時の摩擦を低減させ、カバー9は、永久磁石8を保持すると共にケース6に固定されて、被動軸2を支持している。   The drive shaft 1 is inserted and fixed in a hole 6 a formed in the case 6, and the rotor 3 fixed to the drive shaft 1, the armature 4 positioned facing the rotor 3, and the cylindrical portion of the rotor 3 are inserted. The excited excitation coil 5 is accommodated in the case 6. The driven shaft 2 passes through the bush 7 and the cover 9. The bush 7 reduces friction when the driven shaft 2 moves. The cover 9 holds the permanent magnet 8 and is fixed to the case 6. The driven shaft 2 is supported.

このように、駆動軸1の回転トルクを被動軸2に伝達させる場合は、励磁コイル5に通電して磁束を発生させ、アーマチュア4を引き寄せてロータ3と接触させることで被動軸2が駆動軸1と共に回転することとなる。ここで、ロータ3の凹部11がアーマチュア4の円錐状の凸部12と嵌合しているため、駆動軸1及び被動軸2の同心度が確保され、ずれが抑えられている。被動軸2への回転トルクを非伝達とする場合は、励磁コイル5の通電を停止して磁束をなくし、アーマチュア4を永久磁石8によりロータ3と離間されることで、駆動軸1の回転トルクが被動軸2へ伝達されないようにできる。   As described above, when the rotational torque of the drive shaft 1 is transmitted to the driven shaft 2, the exciting coil 5 is energized to generate a magnetic flux, and the armature 4 is drawn and brought into contact with the rotor 3, so that the driven shaft 2 is driven. Will rotate with 1. Here, since the concave portion 11 of the rotor 3 is fitted with the conical convex portion 12 of the armature 4, the concentricity of the drive shaft 1 and the driven shaft 2 is ensured, and the deviation is suppressed. When the rotational torque to the driven shaft 2 is not transmitted, the energization of the exciting coil 5 is stopped to eliminate the magnetic flux, and the armature 4 is separated from the rotor 3 by the permanent magnet 8 so that the rotational torque of the drive shaft 1 is reduced. Can be prevented from being transmitted to the driven shaft 2.

なお、これまで本実施例では、電磁クラッチに本発明を実施した場合について説明したが、電磁ブレーキにも同様に適用可能である。   In addition, although the present Example demonstrated so far the case where this invention was implemented to the electromagnetic clutch, it is applicable similarly to an electromagnetic brake.

また、本実施例では、ロータ3側に凹部が設けられ、アーマチュア4に円錐状の凸部が設けられているが、ロータ3側に円錐状の凸部、アーマチュア4に凹部を形成した場合にも、同様に駆動軸1及び被動軸2のずれが抑えられるようになっている。   In the present embodiment, the concave portion is provided on the rotor 3 side and the conical convex portion is provided on the armature 4. However, when the conical convex portion is provided on the rotor 3 side and the concave portion is formed on the armature 4. Similarly, the displacement of the drive shaft 1 and the driven shaft 2 can be suppressed.

1 駆動軸
2 被動軸
3 ロータ
4 アーマチュア
5 励磁コイル
7 ブッシュ
8 永久磁石
9 カバー
11 凹部
12 凸部
DESCRIPTION OF SYMBOLS 1 Drive shaft 2 Driven shaft 3 Rotor 4 Armature 5 Excitation coil 7 Bush 8 Permanent magnet 9 Cover 11 Concave part 12 Convex part

Claims (1)

駆動源に連結された駆動軸と、前記駆動軸に対向して設けられた被動軸と、前記駆動軸に固定され一体的に転回するロータと、前記ロータに対向して設けられ軸方向に可動可能に被動軸と固定されたアーマチュアと、前記アーマチュアを前記ロータと離間する方向に付勢する付勢手段と、前記アーマチュアを前記ロータ側へ前記付勢手段の付勢力に抗して引き寄せる吸引力を発生させる励磁コイルを備え、
前記ロータの前記アーマチュアと接触する摩擦面に凹部を形成し、
前記アーマチュアの前記ロータと接触する摩擦面に前記凹部と嵌合可能な凸部を形成したことを特徴とする電磁クラッチ及び電磁ブレーキ。
A drive shaft connected to a drive source, a driven shaft provided to face the drive shaft, a rotor fixed to the drive shaft and integrally rotated, and provided to face the rotor and movable in the axial direction An armature fixed to the driven shaft, an urging means for urging the armature in a direction away from the rotor, and a suction force for pulling the armature toward the rotor against the urging force of the urging means It has an exciting coil that generates
Forming a recess in the friction surface in contact with the armature of the rotor;
An electromagnetic clutch and an electromagnetic brake, wherein a convex portion that can be fitted to the concave portion is formed on a friction surface that contacts the rotor of the armature.
JP2009155463A 2009-05-30 2009-06-30 Electromagnetic clutch and electromagnetic brake Pending JP2011012711A (en)

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JP2009155463A JP2011012711A (en) 2009-05-30 2009-06-30 Electromagnetic clutch and electromagnetic brake

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Application Number Priority Date Filing Date Title
JP2009131656 2009-05-30
JP2009155463A JP2011012711A (en) 2009-05-30 2009-06-30 Electromagnetic clutch and electromagnetic brake

Publications (1)

Publication Number Publication Date
JP2011012711A true JP2011012711A (en) 2011-01-20

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Application Number Title Priority Date Filing Date
JP2009155463A Pending JP2011012711A (en) 2009-05-30 2009-06-30 Electromagnetic clutch and electromagnetic brake

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Country Link
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0353641U (en) * 1989-09-29 1991-05-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0353641U (en) * 1989-09-29 1991-05-23

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