JP2013002588A

JP2013002588A - Power transmission device

Info

Publication number: JP2013002588A
Application number: JP2011136141A
Authority: JP
Inventors: Susumu Kusada; 享草田; Tadashi Hotta; 忠資堀田; Motohiko Ueda; 元彦上田; Yuichiro Okuda; 悠一朗奥田; Yasuhiro Takeuchi; 康浩武内
Original assignee: Denso Corp; Nippon Soken Inc
Current assignee: Denso Corp; Soken Inc
Priority date: 2011-06-20
Filing date: 2011-06-20
Publication date: 2013-01-07

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device practically achieved in ON/OFF control in transmission of the rotating torque without using friction in transmission of the rotating torque.SOLUTION: The power transmission device includes a direct current power source 24. Driving side magnets 7 are electromagnets formed of a plurality of iron cores 7 wound with a coil 9 and disposed in the circumferential direction relative to a spline shaft 18. Driven side magnets 8 are electromagnets disposed in the same number as the driving side magnets 7 in the circumferential direction relative to the spline shaft 18, facing the driving side magnets 7. A commutator 11 formed from segments in the same number as the driving side magnets 7 are disposed in the circumferential direction of a driving side rotating body 1. Two brushes 12 brought into contact with the commutator 11 and electrically connected to the direct current power source 24 are disposed in the circumferential direction of the spline shaft 18. A coil 9 is electrically connected to one of the segments in one end thereof and electrically connected to the other segment adjacent to the one segment in the circumferential direction in the other end thereof.

Description

本発明は、車両に配置された駆動源（内燃機関や車両走行モータ等）から車載回転機器に動力を伝達する動力伝達装置に関する。 The present invention relates to a power transmission device that transmits power from a drive source (such as an internal combustion engine or a vehicle travel motor) disposed in a vehicle to an in-vehicle rotating device.

従来、駆動源からカーエアコン用圧縮機等の車載回転機器に動力を伝達する動力伝達装置は、オンオフ自在の摩擦板を介して回転トルク（回転駆動力）を伝達する。しかしながら、この摩擦板は経年劣化や（例えば圧縮機のロック時に）瞬間的に過度の回転トルクが掛かると焼き付きを生じる等の不具合がある。そこで、摩擦板を無くして永久磁石を配置した特許文献１のような動力伝達装置が提案されている。 2. Description of the Related Art Conventionally, a power transmission device that transmits power from a driving source to a vehicle-mounted rotating device such as a compressor for a car air conditioner transmits rotational torque (rotational driving force) via a friction plate that can be turned on and off. However, this friction plate has problems such as secular deterioration and seizure when excessive rotational torque is momentarily applied (for example, when the compressor is locked). Therefore, a power transmission device as in Patent Document 1 in which a permanent magnet is disposed without a friction plate has been proposed.

しかしながら、特許文献１の動力伝達装置は、第１、第２実施形態では回転トルク伝達のオンオフ制御装置の記載が無く、第３、第４実施形態では回転トルク伝達のオンオフ制御装置は摩擦を利用したものであり、従来技術の課題を解決したものではない。 However, in the first and second embodiments, the power transmission device disclosed in Patent Document 1 does not describe the on / off control device for rotational torque transmission. In the third and fourth embodiments, the on / off control device for rotational torque transmission uses friction. However, it does not solve the problems of the prior art.

特開２００９−１２１６７６号公報JP 2009-121676 A

本発明は、上記問題に鑑みてなされたものであり、その目的は、回転トルク伝達において摩擦を一切利用しない動力伝達装置であって回転トルク伝達のオンオフ制御が実用的に実現された動力伝達装置を提供することである。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a power transmission device that does not use any friction in rotational torque transmission and in which on / off control of rotational torque transmission is practically realized. Is to provide.

本発明は、前記課題を解決するための手段として、特許請求の範囲の各請求項に記載の動力伝達装置を提供する。
請求項１に記載の発明によれば、本発明の動力伝達装置（１００）は、
直流電源（２４）を更に備え、
前記駆動側回転伝達磁石（７）は、コイル（９）が巻かれて前記スプライン軸（１８）に対して周方向に配置された複数の鉄心（７）により形成された電磁石であり、
前記従動側回転伝達磁石（８）は、前記駆動側回転伝達磁石（７）に対面するように前記スプライン軸（１８）に対して周方向に、前記駆動側回転伝達磁石（７）と同じ個数が配置された永久磁石であり、
前記駆動側回転体（１）の周方向には、前記駆動側回転伝達磁石（７）と同じ個数のセグメントから構成された整流子（１１）が配置されており、
前記スプライン軸（１８）の周方向には、前記整流子（１１）と接触し、かつ前記直流電源（２４）と電気的に接続する２つのブラシ（１２）が配置されており、
前記コイル（９）の一端は、１つの前記セグメントと電気的に接続されており、前記コイル（９）の他端は、前記１つのセグメントの周方向に隣接した別のセグメントと電気的に接続されていることを特徴とする。 The present invention provides a power transmission device according to each of the claims as means for solving the problems.
According to the invention described in claim 1, the power transmission device (100) of the present invention comprises:
A DC power supply (24);
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (18),
The number of driven side rotation transmitting magnets (8) is the same as the number of driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (18) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
In the circumferential direction of the driving side rotating body (1), a commutator (11) composed of the same number of segments as the driving side rotation transmitting magnet (7) is arranged,
In the circumferential direction of the spline shaft (18), two brushes (12) that are in contact with the commutator (11) and electrically connected to the DC power supply (24) are disposed,
One end of the coil (9) is electrically connected to one of the segments, and the other end of the coil (9) is electrically connected to another segment adjacent in the circumferential direction of the one segment. It is characterized by being.

永久磁石（８）と電磁石（７）と整流子（１１）の組み合わせにより、回転トルク伝達のオンオフ制御装置が構成される。この単純な構成により、摩擦を一切利用しない動力伝達装置を提供することが可能となる。 The combination of the permanent magnet (8), the electromagnet (7) and the commutator (11) constitutes an on / off control device for rotational torque transmission. With this simple configuration, it is possible to provide a power transmission device that does not use any friction.

請求項２に記載の発明によれば、本発明の動力伝達装置（１００）は、
１つの前記ブラシ（１２）の一端は、リング状の第１電極（１３ａ）を介して電源（２４）と電気的に接続されており、他の前記ブラシ（１２）の一端は、リング状の第２電極（１３ｂ）を介して電源（２４）と電気的に接続されていることを特徴とする。
この構成により、配線が切断されたり損傷を受けたりすることの無い、コンパクトで信頼性の高いブラシ（１２）と電源（２４）の電気的接続手段を提供することが可能となる。 According to the invention described in claim 2, the power transmission device (100) of the present invention comprises:
One end of one brush (12) is electrically connected to a power source (24) via a ring-shaped first electrode (13a), and one end of the other brush (12) is ring-shaped. It is electrically connected to the power source (24) through the second electrode (13b).
With this configuration, it is possible to provide a compact and highly reliable electrical connection means between the brush (12) and the power source (24) without causing the wiring to be cut or damaged.

請求項３に記載の発明によれば、本発明の動力伝達装置（２００）は、
直流電源（２４）を更に備え、
前記駆動側回転伝達磁石（７）は、コイル（９）が巻かれて前記スプライン軸（１１８）に対して周方向に配置された複数の鉄心（７）により形成された電磁石であり、
前記従動側回転伝達磁石（８）は、前記駆動側回転伝達磁石（７）に対面するように前記スプライン軸（１１８）に対して周方向に、前記駆動側回転伝達磁石（７）と同じ個数が配置された永久磁石であり、
前記直流電源（２４）と前記コイル（９）に電気的に接続し、かつ前記駆動側回転体（１）の回転角度と前記従動側回転体（４）の回転角度に基づいて、前記コイル（９）へ供給する電流のオン・オフ及び電流の向きを制御するコイル電流制御手段（２５）と、を更に備えることを特徴とする。 According to invention of Claim 3, the power transmission device (200) of the present invention comprises:
A DC power supply (24);
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (118),
The number of the driven side rotation transmitting magnets (8) is the same as the number of the driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (118) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
The coil (9) is electrically connected to the DC power source (24) and the coil (9) based on the rotation angle of the driving side rotating body (1) and the rotation angle of the driven side rotating body (4). 9) Coil current control means (25) for controlling on / off and current direction of the current supplied to 9).

永久磁石（８）と電磁石（７）と駆動側回転角度検出手段（２７ａ）と従動側回転角度検出手段（２７ｂ）とコイル電流制御手段（２５）の組み合わせにより、回転トルク伝達のオンオフ制御装置が構成される。この単純な構成により、摩擦を一切利用しない動力伝達装置を提供することが可能となる。 The combination of the permanent magnet (8), the electromagnet (7), the drive side rotation angle detection means (27a), the driven side rotation angle detection means (27b) and the coil current control means (25) provides an on / off control device for rotational torque transmission. Composed. With this simple configuration, it is possible to provide a power transmission device that does not use any friction.

請求項４に記載の発明によれば、本発明の動力伝達装置（３００）は、
直流電源（２４）を更に備え、
前記駆動側回転伝達磁石（７）は、コイル（９）が巻かれて前記スプライン軸（１１８）に対して周方向に配置された複数の鉄心（７）により形成された電磁石であり、
前記従動側回転伝達磁石（８）は、前記駆動側回転伝達磁石（７）に対面するように前記スプライン軸（１１８）に対して周方向に、前記駆動側回転伝達磁石（７）と同じ個数が配置された永久磁石であり、
前記直流電源（２４）と前記コイル（９）に電気的に接続し、かつ１つの前記コイル（９）を用いて１つの前記コイル（９）に生じる前記駆動側回転伝達磁石（７）と前記従動側回転伝達磁石（８）との間の誘導起電力を計測することにより演算される前記駆動側回転体（１）と前記従動側回転体（４）との間の相対的回転角度に基づいて、他の前記コイル（９）へ供給する電流のオン・オフ及び電流の向きを制御するコイル電流制御手段（１２５）を更に備えることを特徴とする。 According to the invention described in claim 4, the power transmission device (300) of the present invention comprises:
A DC power supply (24);
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (118),
The number of the driven side rotation transmitting magnets (8) is the same as the number of the driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (118) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
The drive-side rotation transmission magnet (7) electrically connected to the DC power source (24) and the coil (9) and generated in one coil (9) using the one coil (9) Based on the relative rotation angle between the driving side rotating body (1) and the driven side rotating body (4) calculated by measuring the induced electromotive force between the driven side rotation transmitting magnet (8). The coil further includes coil current control means (125) for controlling on / off of the current supplied to the other coil (9) and the direction of the current.

永久磁石（８）と電磁石（７）（１つの誘導起電力計測用電磁石を含む）とコイル電流制御手段の組み合わせにより、回転トルク伝達のオンオフ制御装置が構成される。このとき、コイル電流制御手段は、１つの前記コイル（９）を用いて１つの前記コイル（９）に生じる前記駆動側回転伝達磁石（７）と前記従動側回転伝達磁石（８）との間の誘導起電力を計測することにより演算される前記駆動側回転体（１）と前記従動側回転体（４）との間の相対的回転角度に基づいて、他の前記コイル（９）へ供給する電流のオン・オフ及び電流の向きを制御する。この単純な構成と制御方法により、摩擦を一切利用しない動力伝達装置を提供することが可能となる。 A combination of the permanent magnet (8), the electromagnet (7) (including one electromotive force measuring electromagnet) and the coil current control means constitutes an on / off control device for rotational torque transmission. At this time, the coil current control means uses a single coil (9) between the drive side rotation transmission magnet (7) and the driven side rotation transmission magnet (8) generated in one coil (9). Based on the relative rotation angle between the driving side rotating body (1) and the driven side rotating body (4) calculated by measuring the induced electromotive force of the other side, the other coil (9) is supplied. To control on / off of current and direction of current. With this simple configuration and control method, it is possible to provide a power transmission device that does not use any friction.

請求項５に記載の発明によれば、本発明の動力伝達装置（１００、２００、３００）は、前記駆動側回転体（１）に配置された反発用駆動側永久磁石（５ｂ）と、前記従動側回転体（４）に前記反発用駆動側永久磁石（５ｂ）と反対の磁極で対面するように配置された反発用従動側永久磁石（５ａ）により形成されて、反発磁力によって前記従動側回転体（４）を前記駆動側回転体（１）から軸方向に離間させる回転体離間手段、を更に備えたことを特徴とする。
この構成により信頼性の高い単純な回転体離間手段を提供することが可能となる。 According to the invention described in claim 5, the power transmission device (100, 200, 300) of the present invention includes a repulsive drive-side permanent magnet (5b) disposed on the drive-side rotating body (1), and the The driven-side rotating body (4) is formed by a repulsive driven-side permanent magnet (5a) disposed so as to face the repulsive driving-side permanent magnet (5b) opposite to the repulsive driving-side permanent magnet (5b). It further comprises a rotating body separating means for separating the rotating body (4) from the driving side rotating body (1) in the axial direction.
With this configuration, it is possible to provide a simple rotating body separating means with high reliability.

請求項６に記載の発明によれば、本発明の動力伝達装置（２００、３００）は、
前記コイル（９）の一端は、リング状の第１電極（１３ａ）を介してコイル電流制御手段（２５、１２５）の一端と電気的に接続されており、前記コイル（９）の他の一端は、リング状の第２電極（１３ｂ）を介してコイル電流制御手段（２５、１２５）の他の一端と電気的に接続されていることを特徴とする。
この構成により、配線が切断されたり損傷を受けたりすることの無い、コンパクトで信頼性の高いコイル（９）と電源（２４）の電気的接続手段を提供することが可能となる。 According to the invention described in claim 6, the power transmission device (200, 300) of the present invention comprises:
One end of the coil (9) is electrically connected to one end of the coil current control means (25, 125) via the ring-shaped first electrode (13a), and the other end of the coil (9). Is electrically connected to the other end of the coil current control means (25, 125) via the ring-shaped second electrode (13b).
With this configuration, it is possible to provide a compact and highly reliable electrical connection means between the coil (9) and the power source (24) without causing the wiring to be cut or damaged.

本発明の第１実施形態に係る動力伝達装置の接続オフ状態の断面図である。It is sectional drawing of the connection OFF state of the power transmission device which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る動力伝達装置の接続オン状態の断面図である。It is sectional drawing of the connection ON state of the power transmission device which concerns on 1st Embodiment of this invention. 第１実施形態における鉄心及びコイルとブラシ及び整流子の位置関係を表した図である。It is a figure showing the positional relationship of the iron core and coil, brush, and commutator in 1st Embodiment. 図１においてＸ方向から視た従動側回転伝達磁石の配列を表した図である。また、本図は第１実施形態、第２実施形態、第３実施形態に共通するものである。It is the figure showing the arrangement | sequence of the driven side rotation transmission magnet seen from the X direction in FIG. This figure is common to the first embodiment, the second embodiment, and the third embodiment. 第１実施形態におけるＤＣ電源からコイルまでの回路図である。It is a circuit diagram from DC power supply to a coil in a 1st embodiment. 本発明の第２実施形態に係る動力伝達装置の接続オフ状態の断面図である。It is sectional drawing of the connection OFF state of the power transmission device which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る動力伝達装置の接続オン状態の断面図である。It is sectional drawing of the connection ON state of the power transmission device which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る動力伝達装置の接続オフ状態の断面図である。It is sectional drawing of the connection OFF state of the power transmission device which concerns on 3rd Embodiment of this invention. 本発明の第３実施形態に係る動力伝達装置の接続オン状態の断面図である。It is sectional drawing of the connection ON state of the power transmission device which concerns on 3rd Embodiment of this invention.

（第１実施形態）
まず、図１、図２を用いて第１実施形態の構成を説明する。図１は第１実施形態における動力伝達装置１００の接続オフ状態の断面図である。以下において図１、図２、図６〜９における紙面左側を動力伝達装置のフロント側、紙面右側を動力伝達装置のリア側と称する。本実施形態における動力伝達装置１００は、内燃機関や車両走行モータ等の車載駆動源（図示せず）から車両用空調装置の冷凍サイクルを構成する圧縮機２にベルト（図示せず）を介して駆動力を伝達するものである。 (First embodiment)
First, the structure of 1st Embodiment is demonstrated using FIG. 1, FIG. FIG. 1 is a cross-sectional view of the power transmission device 100 in a connection-off state according to the first embodiment. 1, 2, and 6 to 9, the left side of the paper surface is referred to as the front side of the power transmission device, and the right side of the paper surface is referred to as the rear side of the power transmission device. The power transmission device 100 according to the present embodiment includes a belt (not shown) from a vehicle-mounted drive source (not shown) such as an internal combustion engine or a vehicle travel motor to the compressor 2 constituting the refrigeration cycle of the vehicle air conditioner. It transmits the driving force.

動力伝達装置１００は、車載駆動源とベルトによって機械的に連結されたプーリ１ａと、プーリ１ａに一体的に結合されたヨーク１ｂと、プーリ１ａと同軸に配置され、圧縮機２の駆動軸３に機械的に接続されたスプライン軸１８と、スプライン軸１８にボール１０ａ及びスプラインスリーブ１０を介して接続されたハブ４と、を備えている。スプラインスリーブ１０はハブ４に固定されている。一般にスプラインスリーブとボールとスプライン軸を組み合わせたものを「ボールスプライン」と呼ぶことがある。スプラインスリーブ１０の内周側に形成されたスプライン溝と、スプライン軸１８の外周側に形成されたスプライン溝との間には複数のボール１０ａが配置されており、このボールを介して回転力がスプラインスリーブ１０からスプライン軸１８へ伝達される。スプラインスリーブ１０とボール１０ａは、ハブ４を軸方向に変位可能としつつスプライン軸１８とハブ４を同期回転させる。 The power transmission device 100 includes a pulley 1a mechanically connected to a vehicle-mounted drive source and a belt, a yoke 1b integrally coupled to the pulley 1a, a coaxial arrangement with the pulley 1a, and a drive shaft 3 of the compressor 2. And a hub 4 connected to the spline shaft 18 via a ball 10a and a spline sleeve 10. The spline sleeve 10 is fixed to the hub 4. In general, a combination of a spline sleeve, a ball, and a spline shaft is sometimes referred to as a “ball spline”. A plurality of balls 10a are arranged between a spline groove formed on the inner peripheral side of the spline sleeve 10 and a spline groove formed on the outer peripheral side of the spline shaft 18, and rotational force is transmitted via these balls. It is transmitted from the spline sleeve 10 to the spline shaft 18. The spline sleeve 10 and the ball 10a rotate the spline shaft 18 and the hub 4 synchronously while allowing the hub 4 to be displaced in the axial direction.

プーリ１ａは、外周に複数のＶ字溝が設けられ、ラジアルベアリング２０を介して圧縮機２のハウジングのボス部２ａに軸支されるステータ１９により支持されている。つまり、プーリ１ａは、圧縮機２のハウジングの軸方向端部からフロント側に立設したステータ１９に、単列の転がり型のラジアルベアリング２０を介して回転可能に支持されている。 The pulley 1 a is provided with a plurality of V-shaped grooves on the outer periphery, and is supported by a stator 19 that is pivotally supported by a boss 2 a of the housing of the compressor 2 via a radial bearing 20. That is, the pulley 1 a is rotatably supported by the stator 19 erected on the front side from the axial end of the housing of the compressor 2 via the single-row rolling radial bearing 20.

プーリ１ａとヨーク１ｂは一体で回転する駆動側回転体１を形成し、ハブ４は従動側回転体を形成する。そして、動力伝達装置１００は、ヨーク１ｂに配置された駆動側回転伝達磁石７とハブ４に配置された従動側回転伝達磁石８により形成されて、ヨーク１ｂとハブ４との間に所定間隙を保った状態で磁力によって駆動側回転体から従動側回転体に回転駆動力を伝える磁気継ぎ手を備えている。 The pulley 1a and the yoke 1b form a driving side rotating body 1 that rotates integrally, and the hub 4 forms a driven side rotating body. The power transmission device 100 is formed by a drive side rotation transmission magnet 7 disposed on the yoke 1 b and a driven side rotation transmission magnet 8 disposed on the hub 4, and a predetermined gap is provided between the yoke 1 b and the hub 4. A magnetic coupling is provided that transmits a rotational driving force from the driving side rotating body to the driven side rotating body by a magnetic force in a maintained state.

図３に示すように、駆動側回転伝達磁石７は、コイル９が巻かれて、スプライン軸１８に対して周方向に配置された偶数個（例えば８個）の鉄心により形成された電磁石である。従動側回転伝達磁石８は、図１、図４に示すように、永久磁石から形成されており、駆動側回転伝達磁石７に対面するようにスプライン軸１８に対して周方向に等間隔で偶数個が同心円状に配列されている。周方向に隣り合った永久磁石８は、Ｎ極とＳ極が交互に並んで、対面する駆動側回転伝達磁石７と向かい合うように配置されている。駆動側回転伝達磁石７と従動側回転伝達磁石８は、共に円弧状をなしており、その各々の形状及び個数は同一である。 As shown in FIG. 3, the drive-side rotation transmission magnet 7 is an electromagnet formed by an even number (e.g., eight) of iron cores wound around a coil 9 and arranged in the circumferential direction with respect to the spline shaft 18. . As shown in FIGS. 1 and 4, the driven side rotation transmission magnet 8 is formed of a permanent magnet, and is evenly spaced in the circumferential direction with respect to the spline shaft 18 so as to face the driving side rotation transmission magnet 7. The pieces are arranged concentrically. The permanent magnets 8 adjacent to each other in the circumferential direction are arranged so that N poles and S poles are alternately arranged so as to face the driving-side rotation transmitting magnets 7 facing each other. Both the drive side rotation transmission magnet 7 and the driven side rotation transmission magnet 8 have an arc shape, and the shape and the number of each are the same.

ここで、従動側永久磁石８は、温度変化に対する磁気力変化が少なく、１５０℃以上でも消磁しないものが望ましい。これは動力伝達装置が配置される車両のエンジンルーム内が１５０℃以上の高温に達する可能性があるからである。本実施形態では、従動側永久磁石８としてネオジム磁石又はサマリウム−コバルト磁石を用いている。 Here, it is desirable that the driven permanent magnet 8 has a small change in magnetic force with respect to a change in temperature and does not demagnetize even at 150 ° C. or higher. This is because the inside of the engine room of the vehicle in which the power transmission device is arranged may reach a high temperature of 150 ° C. or higher. In this embodiment, a neodymium magnet or a samarium-cobalt magnet is used as the driven permanent magnet 8.

本実施形態では、従動側永久磁石８及び駆動側磁石７は、それぞれ８個配置されている。また、向かい合う従動側永久磁石８及び駆動側磁石（鉄心）７の軸方向隙間は０．２ｍｍ〜１．５ｍｍ（接続オン時）である。また、周方向に隣り合う従動側永久磁石８（又は駆動側磁石７）の間隔は約４ｍｍである。なお、本実施形態におけるプーリ１ａの有効直径は約１００ｍｍである。 In the present embodiment, eight driven-side permanent magnets 8 and eight driving-side magnets 7 are arranged. The axial clearance between the driven permanent magnet 8 and the driving magnet (iron core) 7 facing each other is 0.2 mm to 1.5 mm (when the connection is on). The interval between the driven permanent magnets 8 (or the driving magnets 7) adjacent in the circumferential direction is about 4 mm. In addition, the effective diameter of the pulley 1a in this embodiment is about 100 mm.

ヨーク１ｂとハブ４には各々、反発用永久磁石５が各１個設置されている。反発用永久磁石５は回転伝達磁石７、８の内周側に配置されている。反発用駆動側永久磁石５ｂはヨーク１ｂに配置され、反発用従動側永久磁石５ａは反発用駆動側永久磁石５ｂと同じ磁極で対面するようにハブ４に配置されている。この反発用永久磁石５は、同じ磁極同士の反発磁力によって従動側回転体を駆動側回転体から軸方向に離間させる回転体離間手段となる。 One repulsive permanent magnet 5 is installed on each of the yoke 1b and the hub 4. The repulsive permanent magnet 5 is disposed on the inner peripheral side of the rotation transmitting magnets 7 and 8. The repulsion drive side permanent magnet 5b is disposed on the yoke 1b, and the repulsion drive side permanent magnet 5a is disposed on the hub 4 so as to face the same magnetic pole as the repulsion drive side permanent magnet 5b. The repulsive permanent magnet 5 serves as a rotating body separating means for separating the driven-side rotating body from the driving-side rotating body in the axial direction by the repulsive magnetic force between the same magnetic poles.

次に、コイル９からＤＣ（直流）電源２４までの回路を、図１、図５を用いて説明する。プーリ１ａに一体的に結合されたヨーク１ｂには更に円筒状のステー１ｃが一体的に結合されている。ステー１ｃの外周面の周方向には、駆動側回転伝達磁石７と同じ個数（例えば８個）のセグメント１１ａ〜１１ｇから構成された整流子１１が配置されている。スプライン軸１８にはブラシケース１５を保持するリテーナ２３が一体的に結合されている。リテーナ２３は小径円筒部と大径円筒部を備え、ブラシケース１５内には２つの整流子ブラシ１２が収容されて保持されている。すなわち、２つの整流子ブラシ１２ａ、１２ｂは、スプライン軸１８から視るとスプライン軸１８の周方向に配置されて、リング状電極１３ａ、１３ｂとリング状電極ブラシ１４ａ、１４ｂを介して直流電源２４と電気的に接続されている。リング状電極ブラシ１４ａ、１４ｂは、リング状電極１３ａ、１３ｂと接触しながら回転摺動する。 Next, a circuit from the coil 9 to the DC (direct current) power supply 24 will be described with reference to FIGS. A cylindrical stay 1c is further integrally coupled to the yoke 1b integrally coupled to the pulley 1a. In the circumferential direction of the outer peripheral surface of the stay 1c, a commutator 11 composed of the same number (for example, eight) of segments 11a to 11g as the drive side rotation transmitting magnet 7 is disposed. A retainer 23 that holds the brush case 15 is integrally coupled to the spline shaft 18. The retainer 23 includes a small diameter cylindrical portion and a large diameter cylindrical portion, and two commutator brushes 12 are accommodated and held in the brush case 15. That is, the two commutator brushes 12a and 12b are arranged in the circumferential direction of the spline shaft 18 when viewed from the spline shaft 18, and are connected to the DC power supply 24 via the ring electrodes 13a and 13b and the ring electrode brushes 14a and 14b. And are electrically connected. The ring-shaped electrode brushes 14a and 14b rotate and slide while being in contact with the ring-shaped electrodes 13a and 13b.

図５に示すように、１つのコイル９の一端９ａは、１つのセグメント１１ａと電気的に接続されており、コイル９の他端９ｂは、１つのセグメント１１ａの周方向に隣接した別のセグメント１１ｂと電気的に接続されている。セグメント１１ａは、周方向に隣接した別のセグメント１１ｂの周方向に隣接した更に別のセグメント１１ｃと、同様にセグメント１１ｅと、セグメント１１ｇとに電気的に接続されている。そして同様に、セグメント１１ｂは、セグメント１１ｄと、セグメント１１ｆと、セグメント１１ｈとに電気的に接続されている。すなわち、各セグメントは、周方向に１つのセグメント置きに飛び越えた別のセグメントに相互に電気的に接続されている。 As shown in FIG. 5, one end 9a of one coil 9 is electrically connected to one segment 11a, and the other end 9b of the coil 9 is another segment adjacent to the circumferential direction of one segment 11a. 11b is electrically connected. The segment 11a is electrically connected to another segment 11c adjacent in the circumferential direction of another segment 11b adjacent in the circumferential direction, similarly to the segment 11e and the segment 11g. Similarly, the segment 11b is electrically connected to the segment 11d, the segment 11f, and the segment 11h. That is, each segment is electrically connected to another segment that jumps every other segment in the circumferential direction.

上述のような結線構成により、整流子１１とブラシ１２との間の相対的回転によりブラシ１２ａ（又は１２ｂ）と接触するセグメント１１が周方向に隣接した別のセグメント１１に切り替わると、コイル９に流れる電流の向きが逆になり、これによりコイル９が巻かれている駆動側磁石（鉄心）７の磁極（Ｎ極、Ｓ極）が反転する。動力伝達装置１００が接続オン状態（図２）のときには、駆動側回転体１の回転による連続した磁極の交番反転により、従動側永久磁石８が相手側の駆動側磁石７に周方向に吸引されて従動側永久磁石８が固定されたハブ４が従動回転することとなる。これは、既知の直流モーターの原理と共通する。そして、ハブ４の従動回転は、スプラインスリーブ１０、ボール１０ａ、スプライン軸１８を介して圧縮機２の駆動軸３に伝達される。 When the segment 11 in contact with the brush 12a (or 12b) is switched to another segment 11 adjacent in the circumferential direction due to the relative rotation between the commutator 11 and the brush 12, the coil 9 The direction of the flowing current is reversed, so that the magnetic poles (N pole, S pole) of the drive side magnet (iron core) 7 around which the coil 9 is wound are reversed. When the power transmission device 100 is in the connection-on state (FIG. 2), the driven permanent magnet 8 is attracted in the circumferential direction by the driving magnet 7 on the other side due to the alternating reversal of the continuous magnetic poles due to the rotation of the driving rotor 1. Thus, the hub 4 to which the driven-side permanent magnet 8 is fixed is driven to rotate. This is in common with the principle of known DC motors. The driven rotation of the hub 4 is transmitted to the drive shaft 3 of the compressor 2 through the spline sleeve 10, the ball 10 a, and the spline shaft 18.

以上述べたように、プーリ１ａとヨーク１ｂとステー１ｃとは一体となっており、一体に回転する駆動側回転体１を形成する。そして、ハブ４とスプライン軸１８と圧縮機２の駆動軸３は、その回転に関しては一体品のように回転する。但し、ハブ４はスプライン軸１８に対してスプラインスリーブ１０及びボール１０ａを介して接続されているので、ハブ４はスプライン軸１８上を軸方向に左右に摺動自在に移動することができる。そして、位置決め輪２１はボールスプライン１０のフロント方向への移動を制限する。 As described above, the pulley 1a, the yoke 1b, and the stay 1c are integrated, and form the drive side rotating body 1 that rotates integrally. The hub 4, the spline shaft 18, and the drive shaft 3 of the compressor 2 rotate as if they were an integral product. However, since the hub 4 is connected to the spline shaft 18 via the spline sleeve 10 and the ball 10a, the hub 4 can move on the spline shaft 18 so as to be slidable in the axial direction from side to side. The positioning wheel 21 restricts the movement of the ball spline 10 in the front direction.

（第１実施形態の作動）
次に、図１、２を用いて第１実施形態の作動を説明する。動力伝達装置１００の作動は、（ｉ）オフ状態、（ii）オフ状態からオン状態への切り替え（過渡状態）、（iii）オン状態、（iv）オン状態からオフ状態への切り替え（過渡状態）、の４つの状態がある。 (Operation of the first embodiment)
Next, the operation of the first embodiment will be described with reference to FIGS. The operation of the power transmission device 100 includes (i) an off state, (ii) switching from the off state to the on state (transient state), (iii) on state, and (iv) switching from the on state to the off state (transient state). There are four states.

（ｉ）オフ状態
車載駆動源（図示せず）の動力がベルトを介してプーリ１ａへ伝達され、プーリ１ａ、ヨーク１ｂ、鉄心７、コイル９、および整流子１１は一体で回転する。ハブ４はヨーク１ｂと一定の距離を保ち静止している。鉄心７と磁石８との間で生じる吸引力よりも磁石５ａと磁石５ｂとの間で生じる反発力が大きくなるようにハブ４とヨーク１ｂとの距離を設定している。コイル９への給電は必要が無く、無給電でオフ状態を保持することができる。 (I) Off state The power of a vehicle-mounted drive source (not shown) is transmitted to the pulley 1a via the belt, and the pulley 1a, the yoke 1b, the iron core 7, the coil 9, and the commutator 11 rotate as a unit. The hub 4 is stationary with a certain distance from the yoke 1b. The distance between the hub 4 and the yoke 1b is set so that the repulsive force generated between the magnet 5a and the magnet 5b is larger than the attractive force generated between the iron core 7 and the magnet 8. There is no need to supply power to the coil 9, and the off state can be maintained without power supply.

（ii）オフ状態からオン状態への切り替え
ＤＣ電源２４よりコイル９へ給電し、鉄心７と磁石８との間に吸引力を発生させ、ハブ４をプーリ１ａ側へ軸方向に引き寄せる。ハブ４はスプライン軸１８の段部１８ａに当たるまでプーリ１ａに接近する。磁石８は大きな回転トルク伝達を可能にするためにハブ４の周方向にＮ極とＳ極が交互に並ぶように配置される。磁石８と対向する鉄心７はプーリ１ａと一体で回転するため、コイル９への電流を常に一方向に流すと鉄心７と磁石８との間に吸引力と反発力が交互に発生し、ハブ４をプーリ１ａ側に引き寄せることができない。そのため、Ｎ極の磁石８に対しては鉄心７がＳ極になる向きにコイル９に電流を流し、Ｓ極の磁石に対しては鉄心７がＮ極になる向きにコイル９に電流を流す。 (Ii) Switching from OFF state to ON state Power is supplied from the DC power source 24 to the coil 9 to generate an attractive force between the iron core 7 and the magnet 8, and the hub 4 is pulled toward the pulley 1a in the axial direction. The hub 4 approaches the pulley 1a until it contacts the step portion 18a of the spline shaft 18. The magnets 8 are arranged so that N poles and S poles are alternately arranged in the circumferential direction of the hub 4 in order to enable transmission of a large rotational torque. Since the iron core 7 facing the magnet 8 rotates integrally with the pulley 1a, if a current to the coil 9 is always passed in one direction, an attractive force and a repulsive force are alternately generated between the iron core 7 and the magnet 8, and the hub 4 cannot be pulled toward the pulley 1a. Therefore, for the N-pole magnet 8, a current is passed through the coil 9 in the direction in which the iron core 7 becomes the S pole, and for the S-pole magnet, a current is passed through the coil 9 in the direction in which the iron core 7 becomes the N pole. .

電流の向きの切り替えについては、図３、４、５を用いて説明する。整流子１１はセグメント１１ａ〜ｇが周方向に等間隔で並んだ構成になっており、整流子１１のセグメントと鉄心７は同じ個数で同じ周方向位置に配置される。図４に示すように、磁石８は鉄心７と同じ個数から構成されＮ極とＳ極が周方向に交互に等間隔に配置される。図５より、２つの整流子用ブラシ１２は整流子１１の２つのセグメントにそれぞれ摺動接触するように配置され、コイル９へ給電する電流の向きの切替えが可能になっている。つまり、整流子用ブラシ１２が整流子１１に対して相対的に回転している時は４５°回転するごとに電流の向きが切り替わり常に吸引力または反発力を発生することができる。 The switching of the current direction will be described with reference to FIGS. The commutator 11 has a configuration in which the segments 11a to 11g are arranged at equal intervals in the circumferential direction, and the same number of segments of the commutator 11 and the iron core 7 are arranged at the same circumferential position. As shown in FIG. 4, the magnets 8 are composed of the same number as the iron cores 7, and N poles and S poles are alternately arranged at equal intervals in the circumferential direction. From FIG. 5, the two commutator brushes 12 are arranged so as to be in sliding contact with the two segments of the commutator 11, and the direction of the current supplied to the coil 9 can be switched. That is, when the commutator brush 12 rotates relative to the commutator 11, the direction of the current is switched every time it rotates 45 °, and an attractive force or a repulsive force can always be generated.

（iii）オン状態
ハブ４に結合されたスプラインスリーブ１０がスプライン軸１８の段部１８ａに当たるまでプーリ１ａ側に移動すると、コイル９への給電を止め、鉄心７と磁石８との吸引力のみで回転トルクを伝達する。コイル９への給電は必要が無く、無給電でオン状態を保持することができる。回転トルクの伝達は非接触で行うため、圧縮機２がロックした場合においても動力伝達装置が損傷を受けることが無い。また圧縮機２で発生した振動を車載駆動源（図示せず）へ伝達することが無く、静粛性に優れた動力伝達装置となる。 (Iii) ON state When the spline sleeve 10 coupled to the hub 4 moves toward the pulley 1a until it hits the step portion 18a of the spline shaft 18, the power supply to the coil 9 is stopped, and only the attractive force between the iron core 7 and the magnet 8 is used. Transmits rotational torque. There is no need to supply power to the coil 9, and the ON state can be maintained without power supply. Since the rotational torque is transmitted in a non-contact manner, the power transmission device is not damaged even when the compressor 2 is locked. Further, the vibration generated in the compressor 2 is not transmitted to an on-vehicle drive source (not shown), and the power transmission device is excellent in quietness.

（iv）オンからオフの切り替え
ＤＣ電源２４よりコイル９へ給電し、鉄心７と磁石８との間に反発力を発生させ、ハブ４をプーリ１ａと反対側へ軸方向に移動させる。ハブ４は位置決め輪２１に当たるまで移動する。鉄心７はプーリ１ａと一体で回転するため、磁石８との間で常に反発力を発生させるためにはコイル９に給電する電流を（ii）と逆向きに切替える。 (Iv) Switching from ON to OFF Power is supplied to the coil 9 from the DC power source 24, a repulsive force is generated between the iron core 7 and the magnet 8, and the hub 4 is moved in the axial direction to the side opposite to the pulley 1a. The hub 4 moves until it hits the positioning wheel 21. Since the iron core 7 rotates integrally with the pulley 1a, the current supplied to the coil 9 is switched in the opposite direction to (ii) in order to always generate a repulsive force with the magnet 8.

（第２実施形態）
次に、図６、図７を用いて第２実施形態の構成を説明する。第２実施形態は第１実施形態と類似しているので、その相違点を最初に説明する。
第２実施形態の動力伝達装置２００は、第１実施形態の整流子１１は具備しておらず、直流電源２４とコイル９に電気的に接続し、かつ駆動側回転体１の回転角度と従動側回転体４の回転角度に基づいて、コイル９へ供給する電流のオン・オフ及び電流の向きを制御するコイル電流制御手段（制御器）２５と、を備えている。また、動力伝達装置２００は、駆動側回転体１の回転角度と従動側回転体４の回転角度を検出するために、プーリ１ａとヨーク１ｂおよび鉄心７と一体で回転する回転角度検出用プレート２６ａ、プレート２６ａの回転角度を検出する回転角度検出器２７ａ、ハブ４と磁石８と一体で回転する回転角度検出用プレート２６ｂ、プレート２６ｂの回転角度を検出する回転角度検出器２７ｂを備えている。 (Second Embodiment)
Next, the structure of 2nd Embodiment is demonstrated using FIG. 6, FIG. Since the second embodiment is similar to the first embodiment, the differences will be described first.
The power transmission device 200 according to the second embodiment does not include the commutator 11 according to the first embodiment, is electrically connected to the DC power supply 24 and the coil 9, and the rotation angle and the follower of the driving side rotating body 1. Coil current control means (controller) 25 for controlling on / off of the current supplied to the coil 9 and the direction of the current based on the rotation angle of the side rotating body 4 is provided. Further, the power transmission device 200 detects the rotation angle of the driving side rotating body 1 and the rotation angle of the driven side rotating body 4 so that the rotation angle detecting plate 26a rotates integrally with the pulley 1a, the yoke 1b, and the iron core 7. A rotation angle detector 27a that detects the rotation angle of the plate 26a, a rotation angle detection plate 26b that rotates together with the hub 4 and the magnet 8, and a rotation angle detector 27b that detects the rotation angle of the plate 26b.

電磁石７を構成するコイル９は、リング状電極１３ａ、１３ｂとリング状電極ブラシ１４ａ、１４ｂを介してコイル電流制御手段２５と電気的に接続されている。リング状電極ブラシ１４ａ、１４ｂは、リング状電極１３ａ、１３ｂと接触しながら回転摺動する。そして、コイル９の一端は、リング状の第１電極１３ａを介してコイル電流制御手段２５の一端と電気的に接続されており、コイル９の他の一端は、リング状の第２電極１３ｂを介してコイル電流制御手段２５の他の一端と電気的に接続されている。 The coil 9 constituting the electromagnet 7 is electrically connected to the coil current control means 25 via the ring electrodes 13a and 13b and the ring electrode brushes 14a and 14b. The ring-shaped electrode brushes 14a and 14b rotate and slide while being in contact with the ring-shaped electrodes 13a and 13b. One end of the coil 9 is electrically connected to one end of the coil current control means 25 via the ring-shaped first electrode 13a, and the other end of the coil 9 is connected to the ring-shaped second electrode 13b. And is electrically connected to the other end of the coil current control means 25.

以下の説明は、第１実施形態とほぼ同じである。
動力伝達装置２００は、車載駆動源とベルトによって機械的に連結されたプーリ１ａと、プーリ１ａに一体的に結合されたヨーク１ｂと、プーリ１ａと同軸に配置され、圧縮機２の駆動軸３に機械的に接続されたスプライン軸１１８と、スプライン軸１１８にボール１０ａ及びスプラインスリーブ１０を介して接続されたハブ４と、を備えている。スプラインスリーブ１０はハブ４に固定されている。一般にスプラインスリーブとボールとスプライン軸を組み合わせたものを「ボールスプライン」と呼ぶことがある。スプラインスリーブ１０の内周側に形成されたスプライン溝と、スプライン軸１１８の外周側に形成されたスプライン溝との間には複数のボール１０ａが配置されており、このボールを介して回転力がスプラインスリーブ１０からスプライン軸１１８へ伝達される。スプラインスリーブ１０とボール１０ａは、ハブ４を軸方向に変位可能としつつスプライン軸１１８とハブ４を同期回転させる。 The following description is almost the same as in the first embodiment.
The power transmission device 200 includes a pulley 1a mechanically connected to an in-vehicle drive source and a belt, a yoke 1b integrally coupled to the pulley 1a, a coaxial arrangement with the pulley 1a, and a drive shaft 3 of the compressor 2. And a hub 4 connected to the spline shaft 118 via the ball 10a and the spline sleeve 10. The spline sleeve 10 is fixed to the hub 4. In general, a combination of a spline sleeve, a ball, and a spline shaft is sometimes referred to as a “ball spline”. A plurality of balls 10a are arranged between a spline groove formed on the inner peripheral side of the spline sleeve 10 and a spline groove formed on the outer peripheral side of the spline shaft 118, and rotational force is transmitted via these balls. It is transmitted from the spline sleeve 10 to the spline shaft 118. The spline sleeve 10 and the ball 10a rotate the spline shaft 118 and the hub 4 synchronously while allowing the hub 4 to be displaced in the axial direction.

プーリ１ａとヨーク１ｂは一体で回転する駆動側回転体１を形成し、ハブ４は従動側回転体を形成する。そして、動力伝達装置２００は、ヨーク１ｂに配置された駆動側回転伝達磁石７とハブ４に配置された従動側回転伝達磁石８により形成されて、ヨーク１ｂとハブ４との間に所定間隙を保った状態で磁力によって駆動側回転体から従動側回転体に回転駆動力を伝える磁気継ぎ手を備えている。 The pulley 1a and the yoke 1b form a driving side rotating body 1 that rotates integrally, and the hub 4 forms a driven side rotating body. The power transmission device 200 is formed by a drive side rotation transmission magnet 7 disposed on the yoke 1 b and a driven side rotation transmission magnet 8 disposed on the hub 4, and a predetermined gap is provided between the yoke 1 b and the hub 4. A magnetic coupling is provided that transmits a rotational driving force from the driving side rotating body to the driven side rotating body by a magnetic force in a maintained state.

図３に示すように、駆動側回転伝達磁石７は、コイル９が巻かれて、スプライン軸１１８に対して周方向に配置された偶数個（例えば８個）の鉄心により形成された電磁石である。従動側回転伝達磁石８は、図１、図４に示すように、永久磁石から形成されており、駆動側回転伝達磁石７に対面するようにスプライン軸１１８に対して周方向に等間隔で偶数個が同心円状に配列されている。周方向に隣り合った永久磁石８は、Ｎ極とＳ極が交互に並んで、対面する駆動側回転伝達磁石７と向かい合うように配置されている。駆動側回転伝達磁石７と従動側回転伝達磁石８は、共に円弧状をなしており、その各々の形状及び個数は同一である。 As shown in FIG. 3, the drive-side rotation transmission magnet 7 is an electromagnet formed by an even number (e.g., eight) of iron cores wound around the coil 9 and arranged in the circumferential direction with respect to the spline shaft 118. . As shown in FIGS. 1 and 4, the driven side rotation transmission magnet 8 is formed of a permanent magnet and is evenly spaced in the circumferential direction with respect to the spline shaft 118 so as to face the driving side rotation transmission magnet 7. The pieces are arranged concentrically. The permanent magnets 8 adjacent to each other in the circumferential direction are arranged so that N poles and S poles are alternately arranged so as to face the driving-side rotation transmitting magnets 7 facing each other. Both the drive side rotation transmission magnet 7 and the driven side rotation transmission magnet 8 have an arc shape, and the shape and the number of each are the same.

（第２実施形態の作動）
次に、図６、７を用いて第２実施形態の作動を説明する。動力伝達装置の作動は、（ｉ）オフ状態、（ii）オフ状態からオン状態への切り替え（過渡状態）、（iii）オン状態、（iv）オン状態からオフ状態への切り替え（過渡状態）、の４つの状態がある。 (Operation of Second Embodiment)
Next, the operation of the second embodiment will be described with reference to FIGS. The operation of the power transmission device is as follows: (i) off state, (ii) switching from off state to on state (transient state), (iii) on state, (iv) switching from on state to off state (transient state) There are four states.

（ｉ）オフ状態
車載駆動源（図示せず）の動力がベルトを介してプーリ１ａへ伝達され、プーリ１ａ、ヨーク１ｂ、鉄心７、コイル９、磁石５ｂおよび回転角度検出用プレート２６ａは一体で回転する。ハブ４はヨーク１ｂと一定の距離を保ち静止している。鉄心７と磁石８との間で生じる吸引力よりも磁石５ａと磁石５ｂとの間で生じる反発力が大きくなるようにハブ４とヨーク１ｂとの距離を設定している。コイル９への給電は必要が無く、無給電でオフ状態を保持することができる。 (I) Off state The power of an in-vehicle drive source (not shown) is transmitted to the pulley 1a via the belt, and the pulley 1a, the yoke 1b, the iron core 7, the coil 9, the magnet 5b, and the rotation angle detection plate 26a are integrated. Rotate. The hub 4 is stationary with a certain distance from the yoke 1b. The distance between the hub 4 and the yoke 1b is set so that the repulsive force generated between the magnet 5a and the magnet 5b is larger than the attractive force generated between the iron core 7 and the magnet 8. There is no need to supply power to the coil 9, and the off state can be maintained without power supply.

（ii）オフからオンへの切り替え
ＤＣ電源２４よりコイル９へ給電することで鉄心７を電磁石にして磁石８との間に吸引力を発生させ、ハブ４をプーリ１ａ側へ軸方向に引き寄せる。磁石８はハブ４の周方向にＮ極とＳ極が交互に並ぶように配置されている。鉄心７に巻いたコイル９に流す電流の向きを変えることで電磁石の磁極が反対磁極に（Ｎ極とＳ極の間で）切り替わる（電磁誘導の法則）。静止している磁石８と回転する鉄心７との間で常に吸引力を発生させるためには、鉄心７に巻いたコイル９に流す電流の向きを磁石８の磁極に合わせて切り替えて常にＳ極とＮ極が対向し吸引力が働くように電流を流す。制御器（演算回路）２５はその電流を切り替え制御するものであり、回転角度検出器２７ａと回転角度検出器２７ｂの回転位置情報からコイルに流す電流の向きを適切に切り替える。以上の操作によりハブ４は、ハブ４に結合されたスプラインスリーブ１０がスプライン軸１１８の段部１１８ａに当たるまでプーリ１ａ側に移動する。 (Ii) Switching from OFF to ON By supplying power to the coil 9 from the DC power source 24, the iron core 7 is used as an electromagnet to generate an attractive force between the magnet 8 and the hub 4 is pulled toward the pulley 1a in the axial direction. The magnets 8 are arranged so that N poles and S poles are alternately arranged in the circumferential direction of the hub 4. By changing the direction of the current flowing through the coil 9 wound around the iron core 7, the magnetic pole of the electromagnet is switched to the opposite magnetic pole (between the N pole and the S pole) (law of electromagnetic induction). In order to always generate an attractive force between the stationary magnet 8 and the rotating iron core 7, the direction of the current flowing through the coil 9 wound around the iron core 7 is switched according to the magnetic pole of the magnet 8 and always the S pole. And an N pole are opposed to each other, and a current is passed so that an attractive force works. The controller (arithmetic circuit) 25 switches and controls the current, and appropriately switches the direction of the current flowing through the coil from the rotational position information of the rotation angle detector 27a and the rotation angle detector 27b. By the above operation, the hub 4 moves to the pulley 1a side until the spline sleeve 10 coupled to the hub 4 hits the step portion 118a of the spline shaft 118.

（iii）オン状態
ハブ４に結合されたスプラインスリーブ１０がスプライン軸１１８の段部１１８ａに当たるまでプーリ１ａに接近すると、コイル９への給電を止め、鉄心７と磁石８との吸引力のみで回転トルク（回転駆動力）を伝達する。コイル９への給電は必要が無く、無給電でオン状態を保持することができる。回転トルクの伝達は非接触で行われる。 (Iii) ON state When the spline sleeve 10 coupled to the hub 4 approaches the pulley 1a until it hits the step portion 118a of the spline shaft 118, power supply to the coil 9 is stopped and rotation is performed only by the attractive force between the iron core 7 and the magnet 8. Torque (rotational driving force) is transmitted. There is no need to supply power to the coil 9, and the ON state can be maintained without power supply. The rotation torque is transmitted without contact.

（iv）オンからオフへの切り替え
ＤＣ電源２４よりコイル９へ給電し、鉄心７と磁石８との間に反発力を発生させ、ハブ４をプーリ１ａと反対側へ（左へ）軸方向に移動させる。ハブ４は、ハブ４に結合されたスプラインスリーブ１０が位置決め輪２１に当たるまで軸方向に左へ移動する。鉄心７はプーリ１ａと一体で回転するため、磁石８との間で常に反発力を発生させるためにはコイル９に給電する電流を（ii）と逆向きに切替える。 (Iv) Switching from ON to OFF Power is supplied from the DC power source 24 to the coil 9 to generate a repulsive force between the iron core 7 and the magnet 8, and the hub 4 is moved in the axial direction to the opposite side (to the left) from the pulley 1a. Move. The hub 4 moves to the left in the axial direction until the spline sleeve 10 coupled to the hub 4 hits the positioning wheel 21. Since the iron core 7 rotates integrally with the pulley 1a, the current supplied to the coil 9 is switched in the opposite direction to (ii) in order to always generate a repulsive force with the magnet 8.

（第３実施形態）
次に、図８、図９を用いて第３実施形態の構成を説明する。第３実施形態は第２実施形態と類似しているので、その相違点を最初に説明する。
第３実施形態の動力伝達装置３００は、第２実施形態の駆動側回転角度検出手段２７ａ、従動側回転角度検出手段２７ｂは具備していない。この代替え手段として、直流電源２４とコイル９に電気的に接続し、かつ１つのコイル９を用いて１つのコイル９に生じる駆動側回転伝達磁石７と従動側回転伝達磁石８との間の誘導起電力を計測することにより演算される駆動側回転体１と従動側回転体４との間の相対的回転角度に基づいて、他のコイル９へ供給する電流のオン・オフ及び電流の向きを制御するコイル電流制御手段１２５を備えている。 (Third embodiment)
Next, the configuration of the third embodiment will be described with reference to FIGS. Since the third embodiment is similar to the second embodiment, the differences will be described first.
The power transmission device 300 according to the third embodiment does not include the driving side rotation angle detection unit 27a and the driven side rotation angle detection unit 27b according to the second embodiment. As an alternative to this, induction between the drive side rotation transmission magnet 7 and the driven side rotation transmission magnet 8 that is electrically connected to the DC power supply 24 and the coil 9 and is generated in one coil 9 by using one coil 9. Based on the relative rotation angle between the driving side rotating body 1 and the driven side rotating body 4 calculated by measuring the electromotive force, the on / off state of the current supplied to the other coil 9 and the direction of the current are determined. Coil current control means 125 for controlling is provided.

以下の説明は、第２実施形態と同じである。
電磁石７を構成するコイル９は、リング状電極１３ａ、１３ｂとリング状電極ブラシ１４ａ、１４ｂを介してコイル電流制御手段１２５と電気的に接続されている。リング状電極ブラシ１４ａ、１４ｂは、リング状電極１３ａ、１３ｂと接触しながら回転摺動する。そして、コイル９の一端は、リング状の第１電極１３ａを介してコイル電流制御手段１２５の一端と電気的に接続されており、コイル９の他の一端は、リング状の第２電極１３ｂを介してコイル電流制御手段１２５の他の一端と電気的に接続されている。 The following description is the same as in the second embodiment.
The coil 9 constituting the electromagnet 7 is electrically connected to the coil current control means 125 through the ring electrodes 13a and 13b and the ring electrode brushes 14a and 14b. The ring-shaped electrode brushes 14a and 14b rotate and slide while being in contact with the ring-shaped electrodes 13a and 13b. One end of the coil 9 is electrically connected to one end of the coil current control means 125 via the ring-shaped first electrode 13a, and the other end of the coil 9 is connected to the ring-shaped second electrode 13b. To the other end of the coil current control means 125.

以下の説明は、第１実施形態、第２実施形態とほぼ同じである。
動力伝達装置３００は、車載駆動源とベルトによって機械的に連結されたプーリ１ａと、プーリ１ａに一体的に結合されたヨーク１ｂと、プーリ１ａと同軸に配置され、圧縮機２の駆動軸３に機械的に接続されたスプライン軸１１８と、スプライン軸１１８にボール１０ａ及びスプラインスリーブ１０を介して接続されたハブ４と、を備えている。スプラインスリーブ１０はハブ４に固定されている。一般にスプラインスリーブとボールとスプライン軸を組み合わせたものを「ボールスプライン」と呼ぶことがある。スプラインスリーブ１０の内周側に形成されたスプライン溝と、スプライン軸１１８の外周側に形成されたスプライン溝との間には複数のボール１０ａが配置されており、このボールを介して回転力がスプラインスリーブ１０からスプライン軸１１８へ伝達される。スプラインスリーブ１０とボール１０ａは、ハブ４を軸方向に変位可能としつつスプライン軸１１８とハブ４を同期回転させる。 The following description is substantially the same as the first embodiment and the second embodiment.
The power transmission device 300 includes a pulley 1a mechanically connected to an in-vehicle drive source and a belt, a yoke 1b integrally coupled to the pulley 1a, a coaxial arrangement with the pulley 1a, and a drive shaft 3 of the compressor 2. And a hub 4 connected to the spline shaft 118 via the ball 10a and the spline sleeve 10. The spline sleeve 10 is fixed to the hub 4. In general, a combination of a spline sleeve, a ball, and a spline shaft is sometimes referred to as a “ball spline”. A plurality of balls 10a are arranged between a spline groove formed on the inner peripheral side of the spline sleeve 10 and a spline groove formed on the outer peripheral side of the spline shaft 118, and rotational force is transmitted via these balls. It is transmitted from the spline sleeve 10 to the spline shaft 118. The spline sleeve 10 and the ball 10a rotate the spline shaft 118 and the hub 4 synchronously while allowing the hub 4 to be displaced in the axial direction.

プーリ１ａとヨーク１ｂは一体で回転する駆動側回転体１を形成し、ハブ４は従動側回転体を形成する。そして、動力伝達装置３００は、ヨーク１ｂに配置された駆動側回転伝達磁石７とハブ４に配置された従動側回転伝達磁石８により形成されて、ヨーク１ｂとハブ４との間に所定間隙を保った状態で磁力によって駆動側回転体から従動側回転体に回転駆動力を伝える磁気継ぎ手を備えている。 The pulley 1a and the yoke 1b form a driving side rotating body 1 that rotates integrally, and the hub 4 forms a driven side rotating body. The power transmission device 300 is formed by a drive side rotation transmission magnet 7 disposed on the yoke 1 b and a driven side rotation transmission magnet 8 disposed on the hub 4, and a predetermined gap is provided between the yoke 1 b and the hub 4. A magnetic coupling is provided that transmits a rotational driving force from the driving side rotating body to the driven side rotating body by a magnetic force in a maintained state.

（第３実施形態の作動）
次に、図８、図９を用いて第３実施形態の作動を説明する。動力伝達装置の作動は、（ｉ）オフ状態、（ii）オフからオンへの切り替え（過渡状態）、（iii）オン状態、（iv）オンからオフへの切り替え（過渡状態）、の４つの状態がある。 (Operation of the third embodiment)
Next, the operation of the third embodiment will be described with reference to FIGS. There are four types of operation of the power transmission device: (i) off state, (ii) switching from off to on (transient state), (iii) on state, and (iv) switching from on to off (transient state). There is a state.

（ｉ）オフ状態
車載駆動源（図示せず）の動力がベルトを介してプーリ１ａへ伝達され、プーリ１ａ、ヨーク１ｂ、鉄心７、コイル９、磁石５ｂは一体で回転する。ハブ４はヨーク１ｂと一定の距離を保ち静止している。鉄心７と磁石８との間で生じる吸引力よりも磁石５ａと磁石５ｂとの間で生じる反発力が大きくなるようにハブ４とヨーク１ｂとの距離を設定している。コイル９への給電は必要が無く、無給電でオフ状態を保持することができる。 (I) Off state The power of a vehicle-mounted drive source (not shown) is transmitted to the pulley 1a via the belt, and the pulley 1a, the yoke 1b, the iron core 7, the coil 9, and the magnet 5b rotate integrally. The hub 4 is stationary with a certain distance from the yoke 1b. The distance between the hub 4 and the yoke 1b is set so that the repulsive force generated between the magnet 5a and the magnet 5b is larger than the attractive force generated between the iron core 7 and the magnet 8. There is no need to supply power to the coil 9, and the off state can be maintained without power supply.

（ii）オフ状態からオン状態への切り替え
ＤＣ電源２４よりコイル９へ給電することで鉄心７を電磁石にして磁石８との間に吸引力を発生させ、ハブ４をプーリ１ａ側へ軸方向に引き寄せる。磁石８はハブ４の周方向にＮ極とＳ極が交互に並ぶように配置されている。鉄心７に巻いたコイル９に流す電流の向きを変えることで電磁石の磁極がＮ極とＳ極で切り替わる。静止している磁石８と回転する鉄心７との間で常に吸引力を発生させるためには、鉄心７に巻いたコイル９に流す電流の向きを磁石８の磁極に合わせて切り替えて常にＳ極とＮ極が対向し吸引力が働くように電流を流す。電流の切り替えには磁石８と鉄心７の回転位置情報が必要であり、回転位置の検出をコイル９が巻かれた鉄心７の１つを用いて行う。この検出原理はコイル９の巻かれた鉄心７と磁石８間で働く誘導起電力（電磁誘導の法則）を用いたもので、鉄心７と磁石８の距離が近づいたり離れたりすることでコイル９に生じる誘導起電力が変化し、その電力を計測することで回転位置検出を行う。制御器（演算回路）１２５は電流を切り替える制御をするものであり、誘導起電力から回転位置情報を割り出しコイル９に流す電流の向きを適切に切り替える。ハブ４は、ハブ４に結合されたスプラインスリーブ１０がスプライン軸１１８の段部１１８ａに当たるまで軸方向にプーリ１ａ側へ移動する。 (Ii) Switching from the OFF state to the ON state By supplying power to the coil 9 from the DC power source 24, the iron core 7 is used as an electromagnet to generate an attractive force between the magnet 8 and the hub 4 in the axial direction toward the pulley 1a. Draw. The magnets 8 are arranged so that N poles and S poles are alternately arranged in the circumferential direction of the hub 4. By changing the direction of the current flowing through the coil 9 wound around the iron core 7, the magnetic pole of the electromagnet is switched between the N pole and the S pole. In order to always generate an attractive force between the stationary magnet 8 and the rotating iron core 7, the direction of the current flowing through the coil 9 wound around the iron core 7 is switched according to the magnetic pole of the magnet 8 and always the S pole. And an N pole are opposed to each other, and a current is passed so that an attractive force works. To switch the current, the rotational position information of the magnet 8 and the iron core 7 is necessary, and the rotational position is detected using one of the iron cores 7 around which the coil 9 is wound. This detection principle uses an induced electromotive force (law of electromagnetic induction) that works between the iron core 7 around which the coil 9 is wound and the magnet 8, and the coil 9 is moved as the distance between the iron core 7 and the magnet 8 approaches or separates. The induced electromotive force generated at the time changes, and the rotational position is detected by measuring the power. The controller (arithmetic circuit) 125 performs control to switch the current, and determines the rotational position information from the induced electromotive force and appropriately switches the direction of the current flowing through the coil 9. The hub 4 moves toward the pulley 1a in the axial direction until the spline sleeve 10 coupled to the hub 4 contacts the step portion 118a of the spline shaft 118.

（iii）オン状態
ハブ４に結合されたスプラインスリーブ１０がスプライン軸１１８の段部１１８ａに当たるまでプーリ１ａ側に移動すると、コイル９への給電を止め、鉄心７と磁石８との吸引力のみで回転トルクを伝達する。コイル９への給電は必要が無く、無給電でオン状態を保持することができる。回転トルクの伝達は非接触で行われる。 (Iii) ON state When the spline sleeve 10 coupled to the hub 4 moves to the pulley 1a side until it hits the step portion 118a of the spline shaft 118, power supply to the coil 9 is stopped, and only the attractive force between the iron core 7 and the magnet 8 is used. Transmits rotational torque. There is no need to supply power to the coil 9, and the ON state can be maintained without power supply. The rotation torque is transmitted without contact.

（iv）オン状態からオフ状態への切り替え
ＤＣ電源２４よりコイル９へ給電し、鉄心７と磁石８との間に反発力を発生させ、ハブ４をプーリ１ａと反対側へ軸方向に移動させる。ハブ４は位置決め輪２１に当たるまで移動する。鉄心７はプーリ１ａと一体で回転するため、磁石８との間で常に反発力を発生させるためにはコイル９に給電する電流を（ii）と逆向きに切替える。 (Iv) Switching from ON state to OFF state Electric power is supplied to the coil 9 from the DC power source 24, a repulsive force is generated between the iron core 7 and the magnet 8, and the hub 4 is moved in the axial direction to the opposite side to the pulley 1a. . The hub 4 moves until it hits the positioning wheel 21. Since the iron core 7 rotates integrally with the pulley 1a, the current supplied to the coil 9 is switched in the opposite direction to (ii) in order to always generate a repulsive force with the magnet 8.

以上のように、回転トルク伝達において摩擦を一切利用しない動力伝達装置であって回転トルク伝達のオンオフ制御が実用的に実現された動力伝達装置を提供することが可能となる。 As described above, it is possible to provide a power transmission device that does not use any friction in rotational torque transmission and that is practically realized with on / off control of rotational torque transmission.

１００第１実施形態の動力伝達装置
２００第２実施形態の動力伝達装置
３００第３実施形態の動力伝達装置
１駆動側回転体
２圧縮機
３圧縮機の駆動軸
４従動側回転体
５反発用永久磁石
７電磁石
８永久磁石 DESCRIPTION OF SYMBOLS 100 Power transmission device of 1st Embodiment 200 Power transmission device of 2nd Embodiment 300 Power transmission device of 3rd Embodiment 1 Drive side rotary body 2 Compressor 3 Compressor drive shaft 4 Driven side rotary body 5 Repulsion permanent Magnet 7 Electromagnet 8 Permanent magnet

Claims

A power transmission device (100) for transmitting a driving force from a vehicle-mounted drive source to a vehicle air conditioner compressor (2);
A drive-side rotating body (1) connected to the vehicle-mounted drive source;
A spline shaft (18) disposed coaxially with the drive-side rotator (1) and coupled to the drive shaft (3) of the compressor (2) via a ball (10a) and a spline sleeve (10). A connected driven rotor (4);
The drive-side rotation transmission magnet (7) disposed on the drive-side rotator (1) and the driven-side rotation transmission magnet (8) disposed on the driven-side rotator (4) are configured to perform the drive-side rotation. Magnetism for transmitting a rotational driving force from the driving side rotating body (1) to the driven side rotating body (4) by a magnetic force in a state where a predetermined gap is maintained between the body (1) and the driven side rotating body (4). A power transmission device (100) comprising a joint;
The power transmission device (100) further includes a DC power source (24),
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (18),
The number of driven side rotation transmitting magnets (8) is the same as the number of driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (18) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
In the circumferential direction of the driving side rotating body (1), a commutator (11) composed of the same number of segments as the driving side rotation transmitting magnet (7) is arranged,
In the circumferential direction of the spline shaft (18), two brushes (12) that are in contact with the commutator (11) and electrically connected to the DC power supply (24) are disposed,
One end of the coil (9) is electrically connected to one of the segments, and the other end of the coil (9) is electrically connected to another segment adjacent in the circumferential direction of the one segment. The power transmission device (100) characterized by the above-mentioned.

One end of one brush (12) is electrically connected to the DC power source (24) via a ring-shaped first electrode (13a), and one end of the other brush (12) is a ring The power transmission device (100) according to claim 1, wherein the power transmission device (100) is electrically connected to the DC power supply (24) through a second electrode (13b) having a shape.

A power transmission device (200) for transmitting a driving force from a vehicle-mounted drive source to a compressor for a vehicle air conditioner (2);
A drive-side rotating body (1) connected to the vehicle-mounted drive source;
A spline shaft (118) disposed coaxially with the drive-side rotator (1) and coupled to the drive shaft (3) of the compressor (2) is passed through a ball (10a) and a spline sleeve (10). A connected driven rotor (4);
The drive-side rotation transmission magnet (7) disposed on the drive-side rotator (1) and the driven-side rotation transmission magnet (8) disposed on the driven-side rotator (4) are configured to perform the drive-side rotation. Magnetism for transmitting a rotational driving force from the driving side rotating body (1) to the driven side rotating body (4) by a magnetic force in a state where a predetermined gap is maintained between the body (1) and the driven side rotating body (4). A power transmission device (200) comprising a joint;
The power transmission device (200) further includes a DC power source (24),
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (118),
The number of the driven side rotation transmitting magnets (8) is the same as the number of the driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (118) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
The coil (9) is electrically connected to the DC power source (24) and the coil (9) based on the rotation angle of the driving side rotating body (1) and the rotation angle of the driven side rotating body (4). 9) A power transmission device (200), further comprising coil current control means (25) for controlling on / off of a current supplied to 9) and a direction of the current.

A power transmission device (300) for transmitting driving force from a vehicle-mounted drive source to a vehicle air conditioner compressor (2);
A drive-side rotating body (1) connected to the vehicle-mounted drive source;
A spline shaft (118) disposed coaxially with the drive-side rotator (1) and coupled to the drive shaft (3) of the compressor (2) is passed through a ball (10a) and a spline sleeve (10). A connected driven rotor (4);
The drive-side rotation transmission magnet (7) disposed on the drive-side rotator (1) and the driven-side rotation transmission magnet (8) disposed on the driven-side rotator (4) are configured to perform the drive-side rotation. Magnetism for transmitting a rotational driving force from the driving side rotating body (1) to the driven side rotating body (4) by a magnetic force in a state where a predetermined gap is maintained between the body (1) and the driven side rotating body (4). A power transmission device (300) comprising a joint;
The power transmission device (300) further includes a DC power source (24),
The drive-side rotation transmission magnet (7) is an electromagnet formed by a plurality of iron cores (7) wound around a coil (9) and arranged in the circumferential direction with respect to the spline shaft (118),
The number of the driven side rotation transmitting magnets (8) is the same as the number of the driving side rotation transmitting magnets (7) in the circumferential direction with respect to the spline shaft (118) so as to face the driving side rotation transmitting magnet (7). Is a permanent magnet arranged,
The drive-side rotation transmission magnet (7) electrically connected to the DC power source (24) and the coil (9) and generated in one coil (9) using the one coil (9) Based on the relative rotation angle between the driving side rotating body (1) and the driven side rotating body (4) calculated by measuring the induced electromotive force between the driven side rotation transmitting magnet (8). The power transmission device (300) further comprises coil current control means (125) for controlling on / off of the current supplied to the other coil (9) and the direction of the current.

The repulsive drive-side permanent magnet (5b) disposed on the drive-side rotator (1) and the driven-side rotator (4) face each other with a magnetic pole opposite to the repulsive drive-side permanent magnet (5b). Rotating body separating means (5) which is formed by a repulsive driven permanent magnet (5a) disposed in the space and separates the driven rotating body (4) in the axial direction from the driving rotating body (1) by a repulsive magnetic force. The power transmission device (100, 200, 300) according to any one of claims 1 to 4, further comprising:

One end of the coil (9) is electrically connected to one end of the coil current control means (25, 125) via the ring-shaped first electrode (13a), and the other end of the coil (9). Is electrically connected to the other end of the coil current control means (25, 125) via a ring-shaped second electrode (13b). The power transmission device according to (200, 300).