JP2006177502A

JP2006177502A - Electromagnetic clutch

Info

Publication number: JP2006177502A
Application number: JP2004373539A
Authority: JP
Inventors: Toshihiro Konishi; 俊宏小西; Yasuo Tabuchi; 泰生田渕; Toshihiro Hayashi; 敏弘林
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2004-12-24
Filing date: 2004-12-24
Publication date: 2006-07-06

Abstract

<P>PROBLEM TO BE SOLVED: To increase the span length of a leaf spring in an electromagnetic clutch having such a hub structure that a leaf spring member is joined to an armature through an elastic member formed of a rubber elastic material. <P>SOLUTION: The leaf spring 13e extending in the radial direction of a clutch is formed on the leaf spring member 13, the inner peripheral side 13a of the leaf spring member 13 is joined to a driven side device, and the outer peripheral side 13f of the leaf spring member 13 is integrally joined to the armature 5 through the elastic member 15. An interposing member 16 not adhered to the elastic member 15 is installed between the portion of the elastic member 15 facing the leaf spring 13e and the armature 5 so that the leaf spring 13e can be separated from the armature and elastically deformed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、回転動力の伝達および遮断を行う電磁クラッチに関し、例えばカーエアコンの圧縮機作動の断続のために用いて好適である。 The present invention relates to an electromagnetic clutch that transmits and shuts off rotational power, and is suitable for use, for example, for intermittent operation of a compressor of a car air conditioner.

従来、カーエアコンの圧縮機用電磁クラッチでは、エンジン等の駆動源により回転駆動されるロータと、このロータに対して所定の微小間隙を隔てて対向配置されたアーマチュアと、このアーマチュアを圧縮機側の回転軸に結合するハブ構造とを備えている。 Conventionally, in an electromagnetic clutch for a compressor of a car air conditioner, a rotor that is rotationally driven by a drive source such as an engine, an armature that is disposed opposite to the rotor with a predetermined minute gap, and this armature on the compressor side And a hub structure coupled to the rotating shaft.

そして、このハブ構造として、圧縮機側の回転軸に結合されるインナーハブ（従動側回転部材）と、このインナーハブに結合される板ばね部材とを有し、この板ばね部材をゴムからなる弾性部材にてアーマチュアに一体に結合する構造が公知になっている（特許文献１参照）。 And as this hub structure, it has an inner hub (driven side rotation member) couple | bonded with the rotating shaft by the side of a compressor, and a leaf | plate spring member couple | bonded with this inner hub, This leaf | plate spring member consists of rubber | gum. A structure that is integrally coupled to an armature by an elastic member is known (see Patent Document 1).

この従来技術では、板ばね部材の板ばね部が、クラッチ円周方向に対して斜めに交差するように複数個形成される第１タイプと、板ばね部材が皿ばね状に形成され、複数個の板ばね部がクラッチ半径方向に延びるように形成される第２タイプとを開示している。
特開２０００−１６１３８９号公報 In this prior art, a first type in which a plurality of leaf spring portions of a leaf spring member are formed so as to cross obliquely with respect to the clutch circumferential direction, and a plurality of leaf spring members are formed in a disc spring shape. And a second type formed so that the leaf spring portion of the plate spring portion extends in the clutch radial direction.
JP 2000-161389 A

ところで、電磁クラッチの板ばね部材は、一般に、耐久寿命確保のために板ばね部に引っ張り力が作用する状態を前提として設計される。しかるに、上記従来技術の第１タイプでは、板ばね部材の板ばね部が、クラッチ円周方向に対して斜めに交差するように形成されるので、ロータの一方向の回転では板ばね部に引っ張り力が作用し、ロータの他方向の回転では板ばね部に圧縮力が作用することになる。 By the way, the leaf spring member of the electromagnetic clutch is generally designed on the assumption that a tensile force acts on the leaf spring portion in order to ensure a durable life. However, in the first type of the above prior art, the leaf spring portion of the leaf spring member is formed so as to cross obliquely with respect to the clutch circumferential direction. A force acts, and a compressive force acts on the leaf spring portion when the rotor rotates in the other direction.

この結果、電磁クラッチの使用回転方向が、板ばね部に引っ張り力が加わる一方向のみに限定されてしまう。従って、適用車種の使用回転方向に応じて板ばね部の斜め方向を反転させた２種類の電磁クラッチを製作する必要が生じ、コストアップを招く。 As a result, the use rotation direction of the electromagnetic clutch is limited to only one direction in which a tensile force is applied to the leaf spring portion. Therefore, it becomes necessary to manufacture two types of electromagnetic clutches in which the oblique direction of the leaf spring portion is reversed in accordance with the use rotation direction of the applicable vehicle type, resulting in an increase in cost.

また、上記従来技術の第２タイプでは、板ばね部材の板ばね部にもゴム製の弾性部材が接着され、板ばね部の弾性変形が規制されるので、板ばね部の実質上のスパン長さ（板ばねとして弾性変形する部分の長さ）が小さくなってしまう。 In the second type of the prior art, the elastic member made of rubber is bonded to the leaf spring portion of the leaf spring member, and the elastic deformation of the leaf spring portion is restricted. The length (the length of the portion that is elastically deformed as a leaf spring) becomes small.

その結果、板ばね部材のばね定数が大きくなって、板ばね部材の応力が大きくなり、板ばね部材の耐久性に悪影響を及ぼすとともに、アーマチュア吸引力が増大するという不具合がある。 As a result, the spring constant of the leaf spring member is increased, the stress of the leaf spring member is increased, and the durability of the leaf spring member is adversely affected and the armature suction force is increased.

また、板ばね部のスパン長さが小さいため、ゴムからなる弾性部材の引っ張り方向（クラッチ軸方向）の歪み量が増加して弾性部材の耐久性を低下させる。 Further, since the span length of the leaf spring portion is small, the amount of strain in the pulling direction (clutch axial direction) of the elastic member made of rubber increases, and the durability of the elastic member is lowered.

本発明は上記点に鑑みて、板ばね部材をゴム系弾性材からなる弾性部材によりアーマチュアに一体に結合するハブ構造を持つ電磁クラッチにおいて、適用対象の使用回転方向に応じて正逆両方向の回転方向に使用でき、かつ、板ばね部材および弾性部材の耐久性を向上することを目的とする。 In view of the above points, the present invention provides an electromagnetic clutch having a hub structure in which a leaf spring member is integrally coupled to an armature by an elastic member made of a rubber-based elastic material. It is intended to improve the durability of the leaf spring member and the elastic member.

上記目的を達成するため、請求項１に記載の発明では、電磁コイル（３）の発生する電磁力によって駆動側回転部材（４）に吸着されるアーマチュア（５）と、
前記アーマチュア（５）を前記駆動側回転部材（４）から開離する方向のばね力を発生する板ばね部材（１３）と、
前記アーマチュア（５）と前記板ばね部材（１３）との間に配置され、ゴム系弾性材からなる板状の弾性部材（１５）とを備え、
前記板ばね部材（１３）は、クラッチ半径方向に延びる板ばね部（１３ｅ）を有し、
前記板ばね部材（１３）のうち前記板ばね部（１３ｅ）の内周側部分（１３ａ）が従動側機器に一体に結合され、前記板ばね部材（１３）のうち前記板ばね部（１３ｅ）の外周側部分（１３ｆ）が前記弾性部材（１５）により前記アーマチュア（５）に一体に結合され、
さらに、前記アーマチュア（５）と前記板ばね部（１３ｅ）との間に、前記板ばね部（１３ｅ）が前記アーマチュア（５）から離れて弾性変形できるようにする部分（１６、１７、１８）を設けたことを特徴としている。 In order to achieve the above object, according to the invention described in claim 1, an armature (5) attracted to the drive side rotating member (4) by the electromagnetic force generated by the electromagnetic coil (3)
A leaf spring member (13) that generates a spring force in a direction to separate the armature (5) from the drive side rotation member (4);
A plate-like elastic member (15) made of a rubber-based elastic material, disposed between the armature (5) and the leaf spring member (13);
The leaf spring member (13) has a leaf spring portion (13e) extending in the clutch radial direction,
An inner peripheral side portion (13a) of the leaf spring portion (13e) of the leaf spring member (13) is integrally coupled to a driven device, and the leaf spring portion (13e) of the leaf spring member (13). The outer peripheral side portion (13f) of the armature is integrally coupled to the armature (5) by the elastic member (15),
Further, a portion (16, 17, 18) between the armature (5) and the leaf spring portion (13e) that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5). It is characterized by providing.

これによると、板ばね部材（１３）の板ばね部（１３ｅ）がアーマチュア（５）から離れて弾性変形できるので、板ばね部（１３ｅ）の全長を弾性変形できるスパン長さとして設定できる。その結果、板ばね部材（１３）のばね定数を小さくして、アーマチュア（５）の吸引力を低減できるとともに、板ばね部材（１３）の応力を小さくして板ばね部材（１３）の耐久性を向上できる。 According to this, since the leaf | plate spring part (13e) of a leaf | plate spring member (13) can leave | separate from an armature (5) and can be elastically deformed, the full length of a leaf | plate spring part (13e) can be set as span length which can be elastically deformed. As a result, the spring constant of the leaf spring member (13) can be reduced to reduce the attractive force of the armature (5), and the stress of the leaf spring member (13) can be reduced to improve the durability of the leaf spring member (13). Can be improved.

また、アーマチュア（５）の変位に伴って板ばね部（１３ｅ）が弾性変形しても、この板ばね部（１３ｅ）部分の弾性部材（１５）の歪みを僅少量に抑制できるから、アーマチュア（５）の変位に伴う弾性部材（１５）の歪み量を小さくでき、弾性部材（１５）の耐久性も向上できる。 Further, even if the leaf spring portion (13e) is elastically deformed with the displacement of the armature (5), the deformation of the elastic member (15) of the leaf spring portion (13e) can be suppressed to a small amount. The amount of strain of the elastic member (15) accompanying the displacement of 5) can be reduced, and the durability of the elastic member (15) can also be improved.

そして、板ばね部材（１３）の板ばね部（１３ｅ）がクラッチ半径方向に延びる形状であるから、電磁クラッチ回転方向が正逆いずれの方向であっても、板ばね部材（１３）の板ばね部（１３ｅ）での応力発生状況が同一となる。このため、電磁クラッチの回転方向を、適用対象の使用回転方向に応じて正逆いずれの方向も設定でき、実用上有益である。 And since the leaf | plate spring part (13e) of a leaf | plate spring member (13) is a shape extended in a clutch radial direction, the leaf | plate spring of a leaf | plate spring member (13) is irrespective of which direction of an electromagnetic clutch rotation is forward or reverse. The state of stress generation at the part (13e) is the same. For this reason, the rotation direction of the electromagnetic clutch can be set to either forward or reverse depending on the use rotation direction to be applied, which is practically useful.

請求項２に記載の発明では、電磁コイル（３）の発生する電磁力によって駆動側回転部材（４）に吸着されるアーマチュア（５）と、
従動側機器に結合されるインナーハブ（１１）と、
内周環状部（１３ａ）、外周環状部（１３ｆ）、および前記両環状部（１３ａ、１３ｂ）の半径方向に延びて前記内周環状部（１３ａ）と前記外周環状部（１３ｆ）との間を一体に結合する複数の板ばね部（１３ｅ）を有する板ばね部材（１３）と、
前記アーマチュア（５）と前記板ばね部材（１３）との間に配置され、ゴム系弾性材からなる板状の弾性部材（１５）とを備え、
前記内周環状部（１３ａ）は前記インナーハブ（１１）に一体に結合され、前記外周環状部（１３ｆ）は前記弾性部材（１５）により前記アーマチュア（５）に一体に結合され、
前記板ばね部（１３ｅ）によって前記アーマチュア（５）を前記駆動側回転部材（４）から開離する方向のばね力を発生するようになっており、
さらに、前記アーマチュア（５）と前記板ばね部（１３ｅ）との間に、前記板ばね部（１３ｅ）が前記アーマチュア（５）から離れて弾性変形できるようにする部分（１６、１７、１８）を設けたことを特徴としている。 In the invention according to claim 2, the armature (5) attracted to the drive side rotating member (4) by the electromagnetic force generated by the electromagnetic coil (3);
An inner hub (11) coupled to the driven device;
An inner peripheral annular portion (13a), an outer peripheral annular portion (13f), and both annular portions (13a, 13b) extending in the radial direction between the inner peripheral annular portion (13a) and the outer peripheral annular portion (13f). A leaf spring member (13) having a plurality of leaf spring portions (13e) that integrally couple
A plate-like elastic member (15) made of a rubber-based elastic material, disposed between the armature (5) and the leaf spring member (13);
The inner peripheral annular portion (13a) is integrally coupled to the inner hub (11), and the outer peripheral annular portion (13f) is integrally coupled to the armature (5) by the elastic member (15),
The leaf spring portion (13e) generates a spring force in a direction to separate the armature (5) from the drive side rotation member (4).
Further, a portion (16, 17, 18) between the armature (5) and the leaf spring portion (13e) that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5). It is characterized by providing.

請求項２に記載の発明は、請求項１に対して板ばね部材（１３）が半径方向の２重環状形状であることを特定しているものであって、この２重環状形状からなる板ばね部材（１３）を用いる電磁クラッチにおいて請求項１と同様の作用効果を発揮できる。 The invention according to claim 2 specifies that the leaf spring member (13) has a double annular shape in the radial direction with respect to claim 1, and is a plate having this double annular shape. In the electromagnetic clutch using the spring member (13), the same effect as that of the first aspect can be exhibited.

請求項３に記載の発明のように、請求項１または２に記載の電磁クラッチにおいて、前記弾性部材（１５）は、具体的には、前記アーマチュア（５）および前記板ばね部材（１３）に対して一体成形されるものである。 As in the invention described in claim 3, in the electromagnetic clutch according to claim 1 or 2, specifically, the elastic member (15) is connected to the armature (5) and the leaf spring member (13). On the other hand, it is integrally formed.

請求項４に記載の発明のように、請求項１ないし３のいずれか１つに記載の電磁クラッチにおいて、前記板ばね部（１３ｅ）が前記アーマチュア（５）から離れて弾性変形できるようにする部分は、具体的には、前記弾性部材（１５）と非接着となる介在部材（１６）により構成できる。 According to a fourth aspect of the present invention, in the electromagnetic clutch according to any one of the first to third aspects, the leaf spring portion (13e) can be elastically deformed away from the armature (5). Specifically, the portion can be constituted by an interposition member (16) that is not bonded to the elastic member (15).

請求項５に記載の発明のように、請求項１ないし３のいずれか１つに記載の電磁クラッチにおいて、前記板ばね部（１３ｅ）が前記アーマチュア（５）から離れて弾性変形できるようにする部分は、前記アーマチュア（５）の表面もしくは前記板ばね部（１３ｅ）の表面に形成され、前記弾性部材（１５）と非接着となる部分（１７）により構成してもよい。 As in the invention according to claim 5, in the electromagnetic clutch according to any one of claims 1 to 3, the leaf spring portion (13e) is allowed to elastically deform away from the armature (5). The portion may be formed by a portion (17) that is formed on the surface of the armature (5) or the surface of the leaf spring portion (13e) and is not bonded to the elastic member (15).

請求項６に記載の発明のように、請求項１ないし３のいずれか１つに記載の電磁クラッチにおいて、前記アーマチュア（５）と前記板ばね部（１３ｅ）との間において、前記板ばね部（１３ｅ）と対向する部位に、前記弾性部材（１５）を配置しない空間部（１８）を設け、
前記板ばね部（１３ｅ）が前記アーマチュア（５）から離れて弾性変形できるようにする部分を前記空間部（１８）により構成してもよい。 As in the invention described in claim 6, in the electromagnetic clutch according to any one of claims 1 to 3, the leaf spring portion between the armature (5) and the leaf spring portion (13e). (13e) is provided with a space (18) in which the elastic member (15) is not disposed,
A portion that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5) may be constituted by the space portion (18).

なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。 In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

（第１実施形態）
図１〜図６は第１実施形態であり、図１は車両空調用冷凍サイクルの冷媒圧縮機に装着される電磁クラッチの断面図で、図２のＡ−Ａ断面図である。図２は図１の左側からみた正面図であり、図３は図２のＢ−Ｂ断面図である。図４は板ばね部材１３単体の正面図、図５は弾性部材１５の接着範囲を斜線部で示す電磁クラッチの正面図、図６は樹脂製介在部材１６単体の正面図である。 (First embodiment)
1-6 is 1st Embodiment, FIG. 1 is sectional drawing of the electromagnetic clutch with which the refrigerant | coolant compressor of the refrigeration cycle for vehicle air conditioning is mounted | worn, and is AA sectional drawing of FIG. 2 is a front view from the left side of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB of FIG. 4 is a front view of the plate spring member 13 alone, FIG. 5 is a front view of the electromagnetic clutch showing the adhesion range of the elastic member 15 by a hatched portion, and FIG. 6 is a front view of the resin interposed member 16 alone.

電磁クラッチ１は、ステータ２内に収容された電磁コイル３と、図示しない車両エンジンによって回転駆動される駆動側回転部材をなすロータ４と、電磁コイル３の発生する電磁力によってロータ４に吸着されるアーマチュア５と、このアーマチュア５に結合され、アーマチュア５と一体に回転する従動側回転部材をなすハブ６とを備えている。 The electromagnetic clutch 1 is attracted to the rotor 4 by an electromagnetic coil 3 housed in the stator 2, a rotor 4 that forms a driving side rotating member that is rotationally driven by a vehicle engine (not shown), and an electromagnetic force generated by the electromagnetic coil 3. And a hub 6 that is coupled to the armature 5 and that forms a driven side rotating member that rotates together with the armature 5.

このハブ６は図示しない冷媒圧縮機の回転軸に結合され、冷媒圧縮機に回転動力を伝える。冷媒圧縮機は本実施形態の従動側機器をなす。 The hub 6 is coupled to a rotating shaft of a refrigerant compressor (not shown) and transmits rotational power to the refrigerant compressor. The refrigerant compressor is a driven device of this embodiment.

ステータ２、ロータ４およびアーマチュア５は鉄系の磁性体で形成され、電磁コイル３の発生する磁束の磁気回路を構成する。ステータ２は断面コ字形の形状に形成され、その内側空間に電磁コイル３が収容されている。 The stator 2, the rotor 4, and the armature 5 are formed of an iron-based magnetic material and constitute a magnetic circuit for magnetic flux generated by the electromagnetic coil 3. The stator 2 is formed in a U-shaped cross section, and the electromagnetic coil 3 is accommodated in the inner space.

電磁コイル３は具体的には、スプール７上に巻き回され、このスプール７とともにステータ２の内側空間にエポキシ等の絶縁樹脂部材８によって電気絶縁してモールド固定されている。なお、ステータ２は、リング状の支持部材９を介して図示しない冷媒圧縮機のハウジングに固定される。 Specifically, the electromagnetic coil 3 is wound around a spool 7, and is electrically fixed to the inner space of the stator 2 together with the spool 7 by an insulating resin member 8 such as epoxy and is fixed by molding. The stator 2 is fixed to a housing of a refrigerant compressor (not shown) via a ring-shaped support member 9.

ロータ４は、その外周部に多段式のＶベルト（図示しない）が掛け渡されるプーリ４ａを有し、Ｖベルトを介して伝達されたエンジンの回転動力によって回転する。ロータ４は、ステータ２を微小隙間を介在して収容する断面コ字形に形成されている。また、ロータ４は、その内周にベアリング１０を備え、このベアリング１０によってロータ４は図示しない冷媒圧縮機のハウジングの円筒ボス部の外周面上に回転自在に支持される。 The rotor 4 has a pulley 4a around which a multi-stage V-belt (not shown) is stretched, and is rotated by the rotational power of the engine transmitted through the V-belt. The rotor 4 is formed in a U-shaped cross section that accommodates the stator 2 with a minute gap therebetween. The rotor 4 includes a bearing 10 on the inner periphery thereof, and the rotor 4 is rotatably supported by the bearing 10 on an outer peripheral surface of a cylindrical boss portion of a housing of a refrigerant compressor (not shown).

アーマチュア５はリング状の円板形状に形成され、ロータ４の摩擦面４ｂに所定の微小間隙（例えば０．５mm程度）を隔てて対向配置される。なお、本例のアーマチュア５は、その半径方向の中間部に磁気遮断用溝部５ａを形成している。この溝部５ａはアーマチュア５の円周方向に細長く延びる円弧状の形状にて複数個（例えば４個）形成される。 The armature 5 is formed in a ring-like disk shape, and is disposed opposite to the friction surface 4b of the rotor 4 with a predetermined minute gap (for example, about 0.5 mm). In addition, the armature 5 of this example has a magnetic shielding groove 5a formed in the intermediate portion in the radial direction. A plurality of (for example, four) groove portions 5a are formed in an arc shape that is elongated in the circumferential direction of the armature 5.

従って、アーマチュア５のリング形状は、図１の上半部に示すように磁気遮断用溝部５ａの外周側に位置する外周部５ｂと磁気遮断用溝部５ａの内周側に位置する内周部５ｃとに区分される。なお、図１の下半部は、複数個の磁気遮断用溝部５ａｂ相互間の位置（内外周の一体結合部）における断面形状を示している。 Therefore, as shown in the upper half of FIG. 1, the ring shape of the armature 5 includes an outer peripheral portion 5b positioned on the outer peripheral side of the magnetic blocking groove portion 5a and an inner peripheral portion 5c positioned on the inner peripheral side of the magnetic blocking groove portion 5a. It is divided into and. The lower half of FIG. 1 shows a cross-sectional shape at a position between the plurality of magnetic shielding grooves 5ab (inner and outer integrated coupling portions).

次に、本発明の要部をなすハブ６の詳細について説明すると、鉄系金属にて円筒状に形成されたインナーハブ１１を有し、このインナーハブ１１の円筒部内周面にはスプライン嵌合部１１ａが形成され、このスプライン嵌合部１１ａにて図示しない圧縮機回転軸が回り止めして一体に結合される。 Next, the details of the hub 6 constituting the main part of the present invention will be described. The hub 6 is formed of a ferrous metal in a cylindrical shape, and the inner peripheral surface of the inner hub 11 is spline-fitted. A portion 11a is formed, and a compressor rotation shaft (not shown) is prevented from rotating by the spline fitting portion 11a and is integrally coupled.

また、インナーハブ１１には、その円筒部の軸方向の一端部（外側端部）から半径方向の外方へ延びる取付フランジ部１１ｂが一体形成されている。この取付フランジ部１１ｂは環状の板形状であり、取付フランジ部１１ｂの円形の外周形状は図２に図示されている。 Further, the inner hub 11 is integrally formed with a mounting flange portion 11b extending radially outward from one end portion (outer end portion) in the axial direction of the cylindrical portion. The mounting flange portion 11b has an annular plate shape, and the circular outer peripheral shape of the mounting flange portion 11b is shown in FIG.

この取付フランジ部１１ｂにはリベット１２により板ばね部材１３を一体に固定している。但し、このリベット１２による板ばね部材１３の固定は、アーマチュア５および板ばね部材１３に対する後述の弾性部材成形工程を終了した後に行う。 A leaf spring member 13 is integrally fixed to the mounting flange portion 11b by a rivet 12. However, the leaf spring member 13 is fixed by the rivet 12 after the later-described elastic member forming step for the armature 5 and the leaf spring member 13 is completed.

板ばね部材１３は鉄系の金属ばね材により図４に示す概略円形の板形状に形成される。この概略円形の板形状は、中心部が開口した内周環状部１３ａと外周環状部１３ｆとを有する２重の環状形状になっている。 The leaf spring member 13 is formed of a ferrous metal spring material into a substantially circular plate shape shown in FIG. The substantially circular plate shape is a double annular shape having an inner peripheral annular portion 13a and an outer peripheral annular portion 13f that are open at the center.

板ばね部材１３の内周環状部１３ａには複数（本例では３個）の取付穴１３ｂが円周方向に等間隔で形成され、この取付穴１３ｂおよび金属ワッシャ１４（図１）の中心穴にリベット１２を通して板ばね部材１３の内周環状部１３ａを金属ワッシャ１４を介して取付フランジ部１１ｂに一体に固定している。 A plurality (three in this example) of mounting holes 13b are formed in the inner circumferential annular portion 13a of the leaf spring member 13 at equal intervals in the circumferential direction. The mounting holes 13b and the central hole of the metal washer 14 (FIG. 1) The inner peripheral annular portion 13a of the leaf spring member 13 is integrally fixed to the mounting flange portion 11b through the rivet 12 via the metal washer 14.

板ばね部材１３の半径方向の中間部、すなわち、内周環状部１３ａと外周環状部１３ｆとの間には複数の開口窓部１３ｃが形成されている。この開口窓部１３ｃは本例では板ばね部材１３の円周方向の３箇所に等間隔に形成されている。開口窓部１３ｃは円周方向に細長く延びる円弧状の形状であるが、開口窓部１３ｃの内周形状の中央部には突起１３ｄが形成されている。この突起１３ｃは開口窓部１３ｃの内周部から滑らかな曲面形状で半径方向の外方へ突出している。 A plurality of opening windows 13c are formed between the radial portions of the leaf spring member 13, that is, between the inner peripheral annular portion 13a and the outer peripheral annular portion 13f. In this example, the opening windows 13c are formed at three equal intervals in the circumferential direction of the leaf spring member 13. The opening window 13c has an arcuate shape extending in the circumferential direction, and a protrusion 13d is formed at the center of the inner periphery of the opening window 13c. The protrusion 13c protrudes outward in the radial direction from the inner periphery of the opening window portion 13c with a smooth curved surface.

そして、板ばね部材１３のうち、３箇所の開口窓部１３ｃ相互の間には半径方向に延びる、幅の狭い板ばね部１３ｅが形成される。従って、本例では板ばね部１３ｅが板ばね部材１３の円周方向の３箇所に等間隔に形成される。この３箇所の板ばね部１３ｅによって、内周環状部１３ａと外周環状部１３ｆとの間が一体に結合されている。 And the leaf | plate spring part 13e with a narrow width | variety extended in radial direction between the three opening window parts 13c among the leaf | plate spring members 13 is formed. Therefore, in this example, the leaf spring portions 13e are formed at three equal intervals in the circumferential direction of the leaf spring member 13. By these three plate spring portions 13e, the inner peripheral annular portion 13a and the outer peripheral annular portion 13f are integrally coupled.

次に、板ばね部材１３とアーマチュア５との間には板状の弾性部材１５が介在されている。この弾性部材１５により板ばね部材１３の外周環状部１３ｆとアーマチュア５の外周部５ｂとの間は一体に結合されている。 Next, a plate-like elastic member 15 is interposed between the leaf spring member 13 and the armature 5. The elastic member 15 integrally connects the outer peripheral annular portion 13 f of the leaf spring member 13 and the outer peripheral portion 5 b of the armature 5.

弾性部材１５は、板ばね部材１３とアーマチュア５との間のトルク伝達機能を果たすとともに、振動減衰作用を果たすゴム系弾性材である。ここで、弾性部材１５に用いるゴム材質としては、車両の使用環境温度の広範な変化（−３０℃〜１２０℃）に対してトルク伝達およびトルク変動吸収（振動減衰）の面で優れた特性を発揮するものが好ましく、例えば、塩素化ブチルゴムが好適である。その他に、アクリロニトリルブタジエンゴム、エチレンプロピレンゴム等を弾性部材１５に用いてもよい。 The elastic member 15 is a rubber-based elastic material that performs a torque transmission function between the leaf spring member 13 and the armature 5 and also performs a vibration damping function. Here, the rubber material used for the elastic member 15 has excellent characteristics in terms of torque transmission and torque fluctuation absorption (vibration damping) with respect to a wide range of changes in the operating environment temperature of the vehicle (−30 ° C. to 120 ° C.). What exhibits is preferable, for example, chlorinated butyl rubber is preferable. In addition, acrylonitrile butadiene rubber, ethylene propylene rubber, or the like may be used for the elastic member 15.

また、弾性部材１５は、板ばね部材１３とアーマチュア５との間だけでなく、板ばね部材１３の外側表面（図１の左側表面）およびアーマチュア５の外周端面上にも接着され、板ばね部材１３の外側表面およびアーマチュア５の外周端面を弾性部材１５にてほぼ全面的に覆うようになっている。 The elastic member 15 is bonded not only between the leaf spring member 13 and the armature 5 but also on the outer surface of the leaf spring member 13 (the left side surface in FIG. 1) and the outer peripheral end surface of the armature 5. The outer surface of 13 and the outer peripheral end surface of the armature 5 are almost entirely covered with the elastic member 15.

これにより、アーマチュア５のロータ４への吸引時におけるアーマチュア５および板ばね部材１３の振動抑制作用を高めることができる。なお、図５の斜線部は弾性部材１５の接着範囲を示しており、板ばね部材１３の外側表面が弾性部材１５によりほぼ全面的に覆われている。 Thereby, the vibration suppression effect of the armature 5 and the leaf spring member 13 when the armature 5 is attracted to the rotor 4 can be enhanced. 5 indicates the adhesion range of the elastic member 15, and the outer surface of the leaf spring member 13 is almost entirely covered by the elastic member 15.

なお、板ばね部材１３のうち、外周端部付近の微小範囲に板ばね部材１３の露出部１３ｇ（図１、図３）を設けている。この露出部１３ｇは、後述する弾性部材１５の成形工程において成形金型にて板ばね部材１３の外周端部付近を直接支持する部位であり、この成形金型による直接支持によって板ばね部材１３の正規形状を安定的に維持する。 In the leaf spring member 13, an exposed portion 13g (FIGS. 1 and 3) of the leaf spring member 13 is provided in a minute range near the outer peripheral end portion. The exposed portion 13g is a portion that directly supports the vicinity of the outer peripheral end portion of the leaf spring member 13 by a molding die in a molding process of the elastic member 15 described later. The direct support by the molding die allows the leaf spring member 13 to be directly supported. Maintain regular shape stably.

また、板ばね部材１３の外周環状部１３ｆに設けられている複数の開口部１３ｈ、１３ｉはいずれも弾性部材１５が成形工程にて板ばね部材１３の外側（図１の左側）から板ばね部材１３の内側（図１の右側）へ回り込みしやすくするためのものである。なお、弾性部材１５の外周端付近の複数の円形凹部１５ａは、成形金型に装備される注入ゲートによって形成されるもので、この複数の円形凹部１５ａの部位から溶融ゴム材料の注入が行われる。 Also, the plurality of openings 13h and 13i provided in the outer peripheral annular portion 13f of the leaf spring member 13 are all plate spring members from the outside (left side in FIG. 1) of the leaf spring member 13 in the molding process. It is for making it easy to wrap around inside 13 (right side of FIG. 1). The plurality of circular recesses 15a in the vicinity of the outer peripheral end of the elastic member 15 are formed by injection gates provided in the molding die, and the molten rubber material is injected from the plurality of circular recesses 15a. .

一方、弾性部材１５のうち板ばね部１３ｅに接着される部分とアーマチュア５との間にはこの両者間の接着を阻止する介在部材１６が配置されている。この介在部材１６の全体形状は図６に示す通り概略環状の板部材である。この介在部材１６は、板ばね部材１３のうち、開口窓部１３ｃおよび板ばね部１３ｅの形成部位を円周方向に延びる環状の形状になっている。従って、介在部材１６は図１の上半部に示すようにアーマチュア５のうち内周部５ｃに対向して配置される。 On the other hand, between the portion of the elastic member 15 that is bonded to the leaf spring portion 13e and the armature 5, an interposition member 16 that prevents the bonding between the two is disposed. The overall shape of the interposition member 16 is a substantially annular plate member as shown in FIG. This interposition member 16 has an annular shape extending in the circumferential direction in the portion of the leaf spring member 13 where the opening window portion 13c and the leaf spring portion 13e are formed. Therefore, the interposition member 16 is disposed to face the inner peripheral portion 5c of the armature 5 as shown in the upper half of FIG.

この介在部材１６は弾性部材１５のゴム材質と非接着となる材質、具体的には樹脂で成形されている。本例では、介在部材１６の材質として機械的強度、耐熱性等に優れたポリアミド樹脂（ナイロン６６）を用いている。このポリアミド樹脂（ナイロン６６）は、弾性部材１５として用いる塩素化ブチルゴムの成形温度（溶融ゴムの温度）よりも十分高い耐熱温度を持っている。 The interposition member 16 is formed of a material that does not adhere to the rubber material of the elastic member 15, specifically, a resin. In this example, a polyamide resin (nylon 66) excellent in mechanical strength, heat resistance, etc. is used as the material of the interposition member 16. This polyamide resin (nylon 66) has a heat resistance temperature sufficiently higher than the molding temperature of the chlorinated butyl rubber used as the elastic member 15 (temperature of the molten rubber).

また、介在部材１６の外周部および内周部にはそれぞれ突起部１６ａ、１６ｂ（図１、図３）が形成されている。そして、外周側突起部１６ａをアーマチュア５の磁気遮断用溝部５ａに嵌合し、内周突起部１６ｂをアーマチュア５の内周端面に嵌合することにより、介在部材１６をアーマチュア５に組み付けることができる。 Protrusions 16a and 16b (FIGS. 1 and 3) are formed on the outer peripheral portion and the inner peripheral portion of the interposed member 16, respectively. Then, the interposing member 16 can be assembled to the armature 5 by fitting the outer peripheral projection 16 a to the magnetic shielding groove 5 a of the armature 5 and fitting the inner peripheral projection 16 b to the inner peripheral end surface of the armature 5. it can.

また、介在部材１６のうち、板ばね部材１３の開口窓部１３ｃの一部の領域に対応して開口窓部１６ｃ（図３）が形成され、この開口窓部１６ｃの部分では弾性部材１５がアーマチュア５の内周部５ｃ上に直接接着されるようになっている。 Further, an opening window portion 16c (FIG. 3) is formed corresponding to a partial region of the opening window portion 13c of the leaf spring member 13 in the interposition member 16, and the elastic member 15 is formed in the opening window portion 16c. The armature 5 is directly bonded onto the inner peripheral portion 5c.

弾性部材１５のうち、板ばね部材１３の開口窓部１３ｃ内に位置する扇形の突起部分１５ｂ（図２、図３）は介在部材１６をアーマチュア５側へ押さえ付けて、介在部材１６をアーマチュア５に固定する役割を果たす。 Of the elastic member 15, the fan-shaped protrusion 15 b (FIGS. 2 and 3) located in the opening window portion 13 c of the leaf spring member 13 presses the interposition member 16 toward the armature 5, and the interposition member 16 is pressed against the armature 5. It plays a role to fix.

この扇形の突起部分１５ａの中央部に位置する開口部１５ｃは、アーマチュア５のうち弾性部材１５側の面に成形金型により直接支持される露出部５ｄを形成するためのものである。 The opening 15c located at the center of the fan-shaped protrusion 15a is for forming an exposed portion 5d that is directly supported by a molding die on the surface of the armature 5 on the elastic member 15 side.

次に、アーマチュア５と板ばね部材１３に対して弾性部材１５を一体に成形する方法について説明する。まず、前処理としてアーマチュア５および板ばね部材１３のうち弾性部材１５が接着される部位に接着剤を塗布しておく。 Next, a method for integrally forming the elastic member 15 with respect to the armature 5 and the leaf spring member 13 will be described. First, an adhesive is applied as a pretreatment to a portion of the armature 5 and the leaf spring member 13 where the elastic member 15 is bonded.

次に、介在部材１６の両突起部１６ａ、１６ｂを図１、図３のようにアーマチュア５の磁気遮断用溝部５ａおよび内周端面に嵌合して、介在部材１６をアーマチュア５に組み付ける。 Next, the protrusions 16a and 16b of the interposition member 16 are fitted into the magnetic shielding groove 5a and the inner peripheral end surface of the armature 5 as shown in FIGS. 1 and 3, and the interposition member 16 is assembled to the armature 5.

次に、この介在部材１６付きのアーマチュア５と板ばね部材１３とを弾性部材１５の成形金型内にセットする。ここで、アーマチュア５はロータ４側の面と露出部５ｄの部位において成形金型の内面で直接支持して位置決めできる。 Next, the armature 5 with the interposition member 16 and the leaf spring member 13 are set in a molding die of the elastic member 15. Here, the armature 5 can be directly supported and positioned by the inner surface of the molding die at the surface of the rotor 4 and the exposed portion 5d.

また、板ばね部材１３はその内周側の取付穴１３ｂ付近の表裏両面が露出部（図１の下半部参照）となるので、この取付穴１３ｂ付近の表裏両面と外周端部付近の露出部１３ｇとを成形金型の内面で直接支持して、位置決めできる。 The leaf spring member 13 has exposed portions (see the lower half of FIG. 1) near the mounting hole 13b on the inner peripheral side, so that both the front and back surfaces near the mounting hole 13b and the outer peripheral end portion are exposed. The portion 13g can be directly supported by the inner surface of the molding die and positioned.

ここで、板ばね部材１３は図１に図示するようにその内周部に比較して外周部がアーマチュア５側に位置するように板ばね部１３ｅを弾性的に曲げ変形した状態で成形金型内にセットされる。 Here, as shown in FIG. 1, the leaf spring member 13 is molded in a state where the leaf spring portion 13e is elastically bent and deformed so that the outer peripheral portion is located on the armature 5 side as compared with the inner peripheral portion thereof. Set inside.

このため、板ばね部材１３の内周部とアーマチュア５との距離（間隔）が、板ばね部材１３の外周部（外周環状部１３ｆ）とアーマチュア５との距離（間隔）よりも大きくなっている。これに伴って、板ばね部材１３のうち、開口窓部１３ｃを介して半径方向で対向する突起１３ｄと外周環状部１３ｆとの間に所定の段差が発生するようになっている。 For this reason, the distance (interval) between the inner peripheral portion of the leaf spring member 13 and the armature 5 is larger than the distance (interval) between the outer peripheral portion (outer peripheral annular portion 13 f) of the leaf spring member 13 and the armature 5. . Along with this, a predetermined step is generated between the protrusion 13d and the outer peripheral annular portion 13f which are opposed to each other in the radial direction through the opening window portion 13c in the leaf spring member 13.

次に、弾性部材１５を構成する溶融ゴム材料を成形金型の注入ゲートから金型内部空間に注入して、弾性部材１５の成形を行う。この弾性部材１５の成形は加硫成形であり、鉄系の金属材である板ばね部材１３の表面およびアーマチュア５表面には弾性部材１５が成形と同時に加硫接着される。 Next, the molten rubber material constituting the elastic member 15 is injected from the injection gate of the molding die into the inner space of the die to mold the elastic member 15. The elastic member 15 is molded by vulcanization, and the elastic member 15 is vulcanized and bonded to the surface of the leaf spring member 13 and the surface of the armature 5 which are iron-based metal materials at the same time as the molding.

ここで、介在部材１６は弾性部材１５のゴム材料と非接着な樹脂材料で形成されているので、弾性部材１５は介在部材１６に接着されない。そして、アーマチュア５のうち、内周部５ｃは介在部材１６により被覆されているので、弾性部材１５はアーマチュア５の外周部５ｂのみに接着される。 Here, since the interposed member 16 is formed of a resin material that is not bonded to the rubber material of the elastic member 15, the elastic member 15 is not bonded to the interposed member 16. Since the inner peripheral portion 5 c of the armature 5 is covered with the interposed member 16, the elastic member 15 is bonded only to the outer peripheral portion 5 b of the armature 5.

従って、板ばね部材１３の外周環状部１３ｆのみが弾性部材１５によってアーマチュア５の外周部５ｂに一体に結合される。 Accordingly, only the outer peripheral annular portion 13 f of the leaf spring member 13 is integrally coupled to the outer peripheral portion 5 b of the armature 5 by the elastic member 15.

介在部材１６は弾性部材１５の成形範囲を規定する役割も果たすので、介在部材１６の使用により成形金型の形状を簡素化でき、これにより、成形金型の製造コストを低減できる。 Since the interposed member 16 also serves to define the molding range of the elastic member 15, the use of the interposed member 16 can simplify the shape of the molding die, thereby reducing the manufacturing cost of the molding die.

ところで、弾性部材１５の成形終了後、アーマチュア５、板ばね部材１３、弾性部材１５および介在部材１６を包含する成形構造物を成形金型から取り出すと、板ばね部材１３は成形金型による曲げ変形の拘束状態から解放されるので、板ばね部材１３の外周環状部１３ｆが曲げ変形前の元に位置に復帰しようとするが、この外周環状部１３ｆの変位によって突起１３ｄの内側部分の弾性部材１５が圧縮されるので、外周環状部１３ｆの復帰がこの突起１３ｄ内側部分の弾性部材１５によって抑えられる。これによって、アーマチュア５をロータ４側へ所定距離だけ変位させて、板ばね部材１３の板ばね部１３ｅに初期反力を発生できる。 By the way, when the molding structure including the armature 5, the leaf spring member 13, the elastic member 15, and the interposition member 16 is taken out from the molding die after the molding of the elastic member 15, the leaf spring member 13 is bent and deformed by the molding die. Therefore, the outer peripheral annular portion 13f of the leaf spring member 13 tries to return to the position before the bending deformation, but the elastic member 15 in the inner portion of the projection 13d is displaced by the displacement of the outer peripheral annular portion 13f. Is compressed, the return of the outer peripheral annular portion 13f is suppressed by the elastic member 15 inside the protrusion 13d. As a result, the armature 5 can be displaced toward the rotor 4 by a predetermined distance, and an initial reaction force can be generated in the leaf spring portion 13 e of the leaf spring member 13.

次に、上記構成において第１実施形態の作動を説明すると、電磁コイル３の通電停止時（クラッチオフ時）には、板ばね部材１３の板ばね部１３ｅに発生するばね力によってアーマチュア５がロータ４の摩擦面４ｂより所定間隔離れた位置に保持されている。 Next, the operation of the first embodiment in the above configuration will be described. When the energization of the electromagnetic coil 3 is stopped (clutch off), the armature 5 is rotated by the spring force generated in the leaf spring portion 13e of the leaf spring member 13. 4 is held at a position spaced apart from the friction surface 4b by a predetermined distance.

このため、図示しない車両エンジンからの回転動力はＶベルトを介してロータ４に伝達されるだけで、アーマチュア５およびハブ６へは伝達されず、ロータ４のみがベアリング１０上で空転している。従って、従動機器の冷媒圧縮機は停止している。 For this reason, rotational power from a vehicle engine (not shown) is only transmitted to the rotor 4 via the V-belt, but not transmitted to the armature 5 and the hub 6, and only the rotor 4 is idled on the bearing 10. Therefore, the refrigerant compressor of the driven device is stopped.

これに対し、電磁コイル３に通電されると、電磁コイル３の発生する電磁力によってアーマチュア５が板ばね部材１３の板ばね部１３ｅのばね力に抗してロータ４に吸引され、アーマチュア５がロータ４に吸着される。すると、ロータ４の回転がアーマチュア５、弾性部材１５、板ばね部材１３、およびインナーハブ１１を介して冷媒圧縮機の回転軸に伝達され、冷媒圧縮機が作動する。 On the other hand, when the electromagnetic coil 3 is energized, the armature 5 is attracted to the rotor 4 against the spring force of the leaf spring portion 13e of the leaf spring member 13 by the electromagnetic force generated by the electromagnetic coil 3, and the armature 5 is Adsorbed to the rotor 4. Then, the rotation of the rotor 4 is transmitted to the rotation shaft of the refrigerant compressor via the armature 5, the elastic member 15, the leaf spring member 13, and the inner hub 11, and the refrigerant compressor is activated.

そして、電磁コイル３への通電が遮断されると、電磁力の消滅によりアーマチュア５が板ばね部材１３の板ばね部１３ｅのばね力により元の開離位置に復帰し、冷媒圧縮機が停止状態に戻る。 When the energization of the electromagnetic coil 3 is interrupted, the armature 5 returns to the original open position by the spring force of the leaf spring portion 13e of the leaf spring member 13 due to the disappearance of the electromagnetic force, and the refrigerant compressor is stopped. Return to.

アーマチュア５と板ばね部材１３との間にゴム系弾性材からなる弾性部材１５を介在するとともに、板ばね部材１３の外側表面も弾性部材１５にてほぼ全面的に被覆しているので、上記のクラッチオン時に、アーマチュア５がロータ４の摩擦面に吸着されるときの衝撃、振動を弾性部材１５の振動減衰作用により緩和できる。 The elastic member 15 made of a rubber-based elastic material is interposed between the armature 5 and the leaf spring member 13, and the outer surface of the leaf spring member 13 is almost entirely covered with the elastic member 15. When the clutch is on, the impact and vibration when the armature 5 is attracted to the friction surface of the rotor 4 can be mitigated by the vibration damping action of the elastic member 15.

同様に、圧縮機７の駆動トルク変動に起因する捩じれ共振も弾性部材１５の振動減衰作用により緩和できる。これらの弾性部材１５の振動減衰作用により、電磁クラッチ１および冷媒圧縮機の作動騒音を効果的に低減できる。 Similarly, torsional resonance caused by fluctuations in the driving torque of the compressor 7 can be mitigated by the vibration damping action of the elastic member 15. The vibration damping action of these elastic members 15 can effectively reduce the operating noise of the electromagnetic clutch 1 and the refrigerant compressor.

ところで、弾性部材１５のうち、板ばね部材１３の板ばね部１３ｅと接着される部分には樹脂製の介在部材１６が配置され、この介在部材１６は弾性部材１５と接着されないから、介在部材１６がアーマチュア５に固定されていても、板ばね部材１３の板ばね部１３ｅはアーマチュア５により拘束されることなく、自由に弾性変形できる。 By the way, since the resin-made interposition member 16 is disposed at a portion of the elastic member 15 that is bonded to the leaf spring portion 13 e of the plate spring member 13, and this interposition member 16 is not bonded to the elastic member 15, the interposition member 16. Is fixed to the armature 5, the leaf spring portion 13 e of the leaf spring member 13 can be freely elastically deformed without being restrained by the armature 5.

この結果、板ばね部材１３の板ばね部１３ｅは、そのばね形状部の長さＬ（図４）の全長を弾性変形可能なスパン長さとして利用できる。 As a result, the leaf spring portion 13e of the leaf spring member 13 can use the entire length L (FIG. 4) of the spring-shaped portion as a span length that can be elastically deformed.

これにより、板ばね部材１３の板ばね部１３ｅのばね定数を小さくして、アーマチュア５の吸引力を低減できると同時に、板ばね部材１３に発生する応力も低減でき、板ばね部材１３の耐久性を向上できる。 As a result, the spring constant of the leaf spring portion 13e of the leaf spring member 13 can be reduced to reduce the attractive force of the armature 5, and at the same time, the stress generated in the leaf spring member 13 can be reduced, and the durability of the leaf spring member 13 can be reduced. Can be improved.

また、板ばね部１３ｅ部分に接着されている弾性部材１５は介在部材１６には接着されていないから、アーマチュア５の変位に伴って板ばね部１３ｅが弾性変形しても、この板ばね部１３ｅ部分の弾性部材１５の歪みを僅少量に抑制できる。従って、アーマチュア５の変位に伴う弾性部材１５の歪み量を小さくでき、弾性部材１５の耐久性も向上できる。 Further, since the elastic member 15 bonded to the plate spring portion 13e is not bonded to the interposition member 16, even if the plate spring portion 13e is elastically deformed as the armature 5 is displaced, the plate spring portion 13e. The distortion of the elastic member 15 can be suppressed to a small amount. Therefore, the amount of distortion of the elastic member 15 accompanying the displacement of the armature 5 can be reduced, and the durability of the elastic member 15 can be improved.

（第２実施形態）
第１実施形態では、弾性部材１５のうち、板ばね部材１３の板ばね部１３ｅと接着される部分に樹脂製の介在部材１６を配置しているが、第２実施形態では、この樹脂製の介在部材１６を廃止して、第１実施形態と同等の作用効果を発揮するものである。 (Second Embodiment)
In 1st Embodiment, although the resin-made interposition members 16 are arrange | positioned in the part adhere | attached with the leaf | plate spring part 13e of the leaf | plate spring member 13 among the elastic members 15, in 2nd Embodiment, this resin-made The interposition member 16 is abolished and the same effect as the first embodiment is exhibited.

図７は第２実施形態によるハブ６部分を示しており、アーマチュア５のうち、板ばね部材１３の板ばね部１３ｅと対向する内周部５ｃの表面を、弾性部材１５と非接着となる構成にして、板ばね部材１３の板ばね部１３ｅと対向する部位に、弾性部材１５とアーマチュア５の内周部５ｃとが離れることが可能となる箇所１７を設けている。 FIG. 7 shows a hub 6 portion according to the second embodiment. In the armature 5, the surface of the inner peripheral portion 5 c facing the leaf spring portion 13 e of the leaf spring member 13 is not bonded to the elastic member 15. Thus, a portion 17 where the elastic member 15 and the inner peripheral portion 5c of the armature 5 can be separated is provided at a portion of the leaf spring member 13 facing the leaf spring portion 13e.

ここで、アーマチュア５の内周部５ｃの表面を弾性部材１５と非接着となる構成の具体例としては、内周部５ｃの表面に弾性部材１５の接着を阻止する表面処理、例えば、フッ素樹脂（テフロン（登録商標））等の表面被膜を形成するという手段を採用できる。 Here, as a specific example of the configuration in which the surface of the inner peripheral portion 5c of the armature 5 is not bonded to the elastic member 15, a surface treatment that prevents the elastic member 15 from adhering to the surface of the inner peripheral portion 5c, for example, a fluororesin A means of forming a surface coating such as (Teflon (registered trademark)) can be employed.

別の具体例としては、アーマチュア５の内周部５ｃの表面には接着剤を塗布しないようにして、内周部５ｃ表面への弾性部材１５の接着を阻止するようにしてもよい。 As another specific example, the adhesive may not be applied to the surface of the inner peripheral portion 5c of the armature 5 to prevent the elastic member 15 from adhering to the surface of the inner peripheral portion 5c.

これにより、第２実施形態においても板ばね部１３ｅのスパン長さＬを第１実施形態と同等の長さに設定できる。 Thereby, also in 2nd Embodiment, the span length L of the leaf | plate spring part 13e can be set to the length equivalent to 1st Embodiment.

なお、図７では、アーマチュア５の内周部５ｃの表面を弾性部材１５と非接着となる構成にしているが、板ばね部材１３の板ばね部１３ｅの表面を弾性部材１５と非接着となる構成にしてもよい。このようにしても、板ばね部１３ｅのスパン長さＬを同様に確保できる。 In FIG. 7, the surface of the inner peripheral portion 5 c of the armature 5 is configured not to be bonded to the elastic member 15, but the surface of the leaf spring portion 13 e of the leaf spring member 13 is not bonded to the elastic member 15. It may be configured. Even in this case, the span length L of the leaf spring portion 13e can be similarly secured.

もちろん、板ばね部材１３の板ばね部１３ｅと弾性部材１５との間、およびアーマチュア５の内周部５ｃと弾性部材１５との間を両方とも非接着となる構成にしてもよい。 Of course, both the leaf spring portion 13e of the leaf spring member 13 and the elastic member 15 and the inner peripheral portion 5c of the armature 5 and the elastic member 15 may be non-adhered.

（第３実施形態）
図８は第３実施形態によるハブ６部分を示しており、板ばね部材１３とアーマチュア５との間において板ばね部１３ｅと対向する部位に、弾性部材１５を配置しない空間部１８を設けている。 (Third embodiment)
FIG. 8 shows the hub 6 portion according to the third embodiment, and a space portion 18 in which the elastic member 15 is not disposed is provided at a portion facing the leaf spring portion 13 e between the leaf spring member 13 and the armature 5. .

これによると、空間部１８により板ばね部１３ｅの自由な弾性変形を保証して、板ばね部１３ｅのスパン長さＬを第１、第２実施形態と同様に確保できる。 According to this, free elastic deformation of the leaf spring portion 13e is ensured by the space portion 18, and the span length L of the leaf spring portion 13e can be ensured similarly to the first and second embodiments.

（他の実施形態）
なお、第１実施形態では、介在部材１６を樹脂製としてゴム系弾性材からなる弾性部材１５と非接着にしているが、介在部材１６を金属製とし、その金属表面に弾性部材１５と非接着となる表面処理を施すようにしてもよい。 (Other embodiments)
In the first embodiment, the interposed member 16 is made of resin and is not bonded to the elastic member 15 made of a rubber-based elastic material. However, the interposed member 16 is made of metal and is not bonded to the elastic member 15 on the metal surface. You may make it perform the surface treatment which becomes.

本発明の第１実施形態による電磁クラッチの縦断面図で、図２のＡ−Ａ断面図である。FIG. 3 is a longitudinal sectional view of the electromagnetic clutch according to the first embodiment of the present invention, and is a sectional view taken along line AA in FIG. 2. 図１の電磁クラッチの正面図である。It is a front view of the electromagnetic clutch of FIG. 図２のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 第１実施形態によるハブに備えられる板ばね部材単体の正面図である。It is a front view of the leaf | plate spring member single-piece | unit with which the hub by 1st Embodiment is equipped. 第１実施形態による弾性部材の接着範囲を示す電磁クラッチの正面図である。It is a front view of the electromagnetic clutch which shows the adhesion range of the elastic member by 1st Embodiment. 第１実施形態によるハブに備えられる樹脂製介在部材単体の正面図である。It is a front view of the resin intervention member simple substance with which the hub by a 1st embodiment is equipped. 第２実施形態によるハブの縦断面図である。It is a longitudinal cross-sectional view of the hub by 2nd Embodiment. 第３実施形態によるハブの縦断面図である。It is a longitudinal cross-sectional view of the hub by 3rd Embodiment.

Explanation of symbols

３…電磁コイル、４…ロータ（駆動側回転部材）、５…アーマチュア、
１３…板ばね部材、１３ｅ…板ばね部、１５…弾性部材、１６…介在部材。 3 ... Electromagnetic coil, 4 ... Rotor (drive side rotating member), 5 ... Armature,
DESCRIPTION OF SYMBOLS 13 ... Plate spring member, 13e ... Plate spring part, 15 ... Elastic member, 16 ... Interposition member.

Claims

An electromagnetic coil (3) that generates electromagnetic force when energized;
A drive-side rotating member (4) that is rotated by a drive source;
An armature (5) that is attracted to the driving side rotating member (4) by the electromagnetic force generated by the electromagnetic coil (3) and receives the rotation of the driving side rotating member (4);
A leaf spring member (13) that generates a spring force in a direction to separate the armature (5) from the drive side rotation member (4);
A plate-like elastic member (15) made of a rubber-based elastic material, disposed between the armature (5) and the leaf spring member (13);
The leaf spring member (13) has a leaf spring portion (13e) extending in the clutch radial direction,
An inner peripheral side portion (13a) of the leaf spring portion (13e) of the leaf spring member (13) is integrally coupled to a driven device, and the leaf spring portion (13e) of the leaf spring member (13). The outer peripheral side portion (13f) of the armature is integrally coupled to the armature (5) by the elastic member (15),
Further, a portion (16, 17, 18) between the armature (5) and the leaf spring portion (13e) that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5). The electromagnetic clutch characterized by providing.

An electromagnetic coil (3) that generates electromagnetic force when energized;
A drive-side rotating member (4) that is rotated by a drive source;
An armature (5) that is attracted to the driving side rotating member (4) by the electromagnetic force generated by the electromagnetic coil (3) and receives the rotation of the driving side rotating member (4);
An inner hub (11) coupled to the driven device;
An inner peripheral annular portion (13a), an outer peripheral annular portion (13f), and both annular portions (13a, 13b) extending in the radial direction between the inner peripheral annular portion (13a) and the outer peripheral annular portion (13f). A leaf spring member (13) having a plurality of leaf spring portions (13e) that integrally couple
A plate-like elastic member (15) made of a rubber-based elastic material, disposed between the armature (5) and the leaf spring member (13);
The inner peripheral annular portion (13a) is integrally coupled to the inner hub (11), and the outer peripheral annular portion (13f) is integrally coupled to the armature (5) by the elastic member (15),
The leaf spring portion (13e) generates a spring force in a direction to separate the armature (5) from the drive side rotation member (4).
Further, a portion (16, 17, 18) between the armature (5) and the leaf spring portion (13e) that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5). The electromagnetic clutch characterized by providing.

The electromagnetic clutch according to claim 1 or 2, wherein the elastic member (15) is integrally formed with the armature (5) and the leaf spring member (13).

A portion that allows the leaf spring portion (13e) to be elastically deformed away from the armature (5) is constituted by an interposed member (16) that is non-adhered to the elastic member (15). The electromagnetic clutch according to any one of claims 1 to 3.

A portion for allowing the leaf spring portion (13e) to be elastically deformed away from the armature (5) is formed on the surface of the armature (5) or the surface of the leaf spring portion (13e), and the elastic member ( The electromagnetic clutch according to any one of claims 1 to 3, wherein the electromagnetic clutch is constituted by a part (17) that is non-adhering to 15).

Between the armature (5) and the leaf spring portion (13e), a space portion (18) where the elastic member (15) is not disposed is provided at a portion facing the leaf spring portion (13e),
The part which enables the said leaf | plate spring part (13e) to leave | separate from the said armature (5) and to elastically deform is comprised by the said space part (18), The one of Claim 1 thru | or 3 characterized by the above-mentioned. The electromagnetic clutch as described in.