JP6843534B2

JP6843534B2 - Clutch unit

Info

Publication number: JP6843534B2
Application number: JP2016134212A
Authority: JP
Inventors: 康雅日比; 恭兵笹沼; 佐藤　光司; 光司佐藤
Original assignee: NTN Corp
Current assignee: NTN Corp
Priority date: 2016-07-06
Filing date: 2016-07-06
Publication date: 2021-03-17
Anticipated expiration: 2036-07-06
Also published as: JP2018004008A

Description

本発明は、レバー操作により回転トルクが入力されるレバー側クラッチ部と、そのレバー側クラッチ部からの回転トルクを出力側へ伝達すると共に、出力側からの回転トルクを遮断するブレーキ側クラッチ部とを備えたクラッチユニットに関する。 The present invention includes a lever-side clutch portion to which rotational torque is input by lever operation, and a brake-side clutch portion that transmits rotational torque from the lever-side clutch portion to the output side and shuts off rotational torque from the output side. Regarding the clutch unit equipped with.

一般に、円筒ころやボール等の係合子を用いるクラッチユニットにおいては、入力部材と出力部材との間にクラッチ部が配設される。このクラッチ部は、前述の入力部材と出力部材との間で円筒ころやボール等の係合子を係合および離脱させることによって、回転トルクの伝達および遮断を制御する構成になっている。 Generally, in a clutch unit using an engager such as a cylindrical roller or a ball, a clutch portion is arranged between an input member and an output member. This clutch portion is configured to control transmission and disconnection of rotational torque by engaging and disengaging an engaging element such as a cylindrical roller or a ball between the above-mentioned input member and output member.

本出願人は、レバー操作により座席シートを上下調整する自動車用シートリフタ部に組み込まれるクラッチユニットを先に提案している（例えば、特許文献１参照）。 The applicant has previously proposed a clutch unit incorporated in an automobile seat lifter that adjusts the seat up and down by lever operation (see, for example, Patent Document 1).

この特許文献１に開示されたクラッチユニットは、レバー操作により回転トルクが入力されるレバー側クラッチ部と、そのレバー側クラッチ部から入力される回転トルクを出力側へ伝達すると共に、出力側から逆入力される回転トルクを遮断するブレーキ側クラッチ部とを備えている。 The clutch unit disclosed in Patent Document 1 transmits the rotational torque input from the lever-side clutch portion to which the rotational torque is input by lever operation and the rotational torque input from the lever-side clutch portion to the output side, and reverses from the output side. It is equipped with a clutch on the brake side that shuts off the input rotational torque.

レバー側クラッチ部は、レバー操作により回転トルクが入力される外輪と、その外輪から入力される回転トルクをブレーキ側クラッチ部に伝達する内輪と、外輪と内輪との間の楔すきまでの係合および離脱により外輪からの回転トルクの伝達および遮断を制御する円筒ころと、外輪から入力される回転トルクで弾性力を蓄積し、回転トルクの入力がなくなると、蓄積された弾性力で外輪を中立状態に復帰させるセンタリングばねとで主要部が構成されている。 The lever-side clutch is engaged between the outer ring to which the rotational torque is input by lever operation, the inner ring that transmits the rotational torque input from the outer ring to the brake-side clutch, and the wedge gap between the outer ring and the inner ring. A cylindrical roller that controls the transmission and cutoff of rotational torque from the outer ring by detachment, and the rotational torque input from the outer ring accumulates elastic force, and when the rotational torque is no longer input, the accumulated elastic force neutralizes the outer ring. The main part is composed of a centering spring that returns to the state.

ブレーキ側クラッチ部は、回転が拘束された外輪と、回転トルクが出力される出力軸と、外輪と出力軸との間の楔すきまでの係合および離脱により出力軸からの回転トルクの遮断とレバー側クラッチ部からの回転トルクの伝達とを制御する円筒ころおよび板ばねと、円筒ころおよび板ばねを円周方向等間隔に保持する保持器とで主要部が構成されている。なお、ブレーキ側クラッチ部の保持器は、レバー側クラッチ部の内輪と一体的に形成されている。 The clutch on the brake side shuts off the rotational torque from the output shaft by engaging and disengaging the outer ring whose rotation is restricted, the output shaft from which the rotational torque is output, and the wedge gap between the outer ring and the output shaft. The main part is composed of a cylindrical roller and a leaf spring that control the transmission of rotational torque from the lever-side clutch portion, and a cage that holds the cylindrical roller and the leaf spring at equal intervals in the circumferential direction. The cage of the brake side clutch portion is integrally formed with the inner ring of the lever side clutch portion.

レバー側クラッチ部では、レバー操作により外輪に回転トルクが入力されると、円筒ころが外輪と内輪との間の楔すきまに係合する。この楔すきまでの円筒ころの係合により、内輪に回転トルクが伝達されて内輪が回転する。この時、外輪の回転に伴ってセンタリングばねに弾性力が蓄積される。 In the lever-side clutch portion, when a rotational torque is input to the outer ring by operating the lever, the cylindrical roller engages with the wedge gap between the outer ring and the inner ring. By engaging the cylindrical rollers up to the wedge, rotational torque is transmitted to the inner ring and the inner ring rotates. At this time, elastic force is accumulated in the centering spring as the outer ring rotates.

レバー操作による回転トルクの入力がなくなると、センタリングばねの弾性力により外輪が中立状態に復帰する一方で、内輪は、与えられた回転位置をそのまま維持する。従って、外輪の回転繰り返し、つまり、操作レバーのポンピング操作により、内輪は寸動回転する。 When the input of rotational torque by lever operation is lost, the outer ring returns to the neutral state due to the elastic force of the centering spring, while the inner ring maintains the given rotational position as it is. Therefore, the inner ring rotates by repeating the rotation of the outer ring, that is, by the pumping operation of the operating lever.

ブレーキ側クラッチ部では、座席シートへの着座により出力軸に回転トルクが逆入力されると、円筒ころが出力軸と外輪との間の楔すきまに係合して出力軸が外輪に対してロックされる。この出力軸のロックにより出力軸からの回転トルクは遮断される。これにより、座席シートの座面は一定の高さに保持される。 In the brake side clutch, when the rotational torque is reversely input to the output shaft when seated on the seat, the cylindrical roller engages with the wedge gap between the output shaft and the outer ring, and the output shaft locks against the outer ring. Will be done. Rotational torque from the output shaft is cut off by locking the output shaft. As a result, the seating surface of the seat is held at a constant height.

一方、レバー側クラッチ部の内輪から回転トルクがブレーキ側クラッチ部の保持器に入力されると、保持器が回転し円筒ころと当接して板ばねの弾性力に抗して円筒ころを押圧することで、円筒ころが外輪と出力軸との間の楔すきまから離脱する。この円筒ころの離脱により、出力軸のロック状態が解除され、出力軸は回転可能となる。 On the other hand, when rotational torque is input to the cage of the clutch on the brake side from the inner ring of the clutch on the lever side, the cage rotates and comes into contact with the cylindrical roller to press the cylindrical roller against the elastic force of the leaf spring. As a result, the cylindrical roller is separated from the wedge gap between the outer ring and the output shaft. By releasing the cylindrical roller, the locked state of the output shaft is released, and the output shaft becomes rotatable.

そして、ブレーキ側クラッチ部の保持器がさらに回転することにより、保持器からの回転トルクが出力軸に伝達され、出力軸が回転する。つまり、保持器が寸動回転すると、出力軸も寸動回転することになる。この出力軸の寸動回転により、座席シートの上下調整が可能となる。 Then, when the cage of the clutch portion on the brake side further rotates, the rotational torque from the cage is transmitted to the output shaft, and the output shaft rotates. That is, when the cage rotates by a small amount, the output shaft also rotates by a small amount. The vertical rotation of the output shaft makes it possible to adjust the seat up and down.

特許第５２０７７７９号公報Japanese Patent No. 5207779

ところで、特許文献１で開示された従来のクラッチユニットは、ブレーキ側クラッチ部の出力軸が、自動車の座席シートを上下調整するシートリフタ部に連結された構造を具備する。 By the way, the conventional clutch unit disclosed in Patent Document 1 has a structure in which the output shaft of the clutch portion on the brake side is connected to the seat lifter portion that adjusts the seat of the automobile up and down.

このブレーキ側クラッチ部では、前述したように、座席シートへの着座により出力軸に回転トルクが逆入力されると、円筒ころが出力軸と外輪との間の楔すきまに係合して出力軸が外輪に対してロックされる。 In this brake side clutch portion, as described above, when the rotational torque is reversely input to the output shaft by sitting on the seat, the cylindrical roller engages with the wedge gap between the output shaft and the outer ring to engage the output shaft. Is locked to the outer ring.

この出力軸への回転トルクの逆入力時、出力軸とシートリフタ部との連結部分でラジアル荷重が発生する。このようなラジアル荷重が出力軸に負荷されると、静止系の外輪に対して出力軸がその軸線に対して傾くことになる。 When the rotational torque is reversely input to the output shaft, a radial load is generated at the connecting portion between the output shaft and the seat lifter portion. When such a radial load is applied to the output shaft, the output shaft is tilted with respect to the axis of the outer ring of the stationary system.

このように、出力軸が傾くと、出力軸の円筒ころとの接触面が傾くことになり、その接触面に対して円筒ころが滑って円筒ころの姿勢が変化するスキューが発生する。このような円筒ころのスキューが発生すると、回転トルクの逆入力時に円筒ころが楔すきまから離脱してしまい、出力軸を確実にロックすることが困難となる。 In this way, when the output shaft is tilted, the contact surface of the output shaft with the cylindrical roller is tilted, and a skew occurs in which the cylindrical roller slides with respect to the contact surface and the posture of the cylindrical roller changes. When such skew of the cylindrical roller occurs, the cylindrical roller is separated from the wedge clearance when the rotational torque is reversely input, and it becomes difficult to securely lock the output shaft.

そこで、本発明は前述の改善点に鑑みて提案されたもので、その目的とするところは、回転トルクの逆入力時、出力軸にラジアル荷重が負荷されても、出力軸を確実にロックし得るクラッチユニットを提供することにある。 Therefore, the present invention has been proposed in view of the above-mentioned improvements, and an object of the present invention is to securely lock the output shaft even when a radial load is applied to the output shaft when the rotational torque is reversely input. The purpose is to provide a clutch unit to obtain.

本発明のクラッチユニットは、入力側に設けられ、レバー操作により入力される回転トルクの伝達および遮断を制御するレバー側クラッチ部と、出力側に設けられ、レバー側クラッチ部から入力される回転トルクを出力側へ伝達すると共に、出力側から逆入力される回転トルクを遮断するブレーキ側クラッチ部とからなる基本構成を具備する。 The clutch unit of the present invention is provided on the input side and is provided on the lever side clutch portion that controls the transmission and disconnection of the rotational torque input by lever operation, and the rotational torque provided on the output side and input from the lever side clutch portion. Is transmitted to the output side, and has a basic configuration including a brake side clutch portion that shuts off the rotational torque that is reversely input from the output side.

本発明におけるブレーキ側クラッチ部は、回転トルクが出力される出力部材と、回転が拘束される静止部材とを備えている。 The brake-side clutch portion in the present invention includes an output member that outputs rotational torque and a stationary member that restrains rotation.

前述の目的を達成するための技術的手段として、本発明は、出力部材と静止部材との間に、軸線に対する出力部材の傾きを規制する支持部を配設したことを特徴とする。 As a technical means for achieving the above-mentioned object, the present invention is characterized in that a support portion for regulating the inclination of the output member with respect to the axis is provided between the output member and the stationary member.

本発明では、出力部材と静止部材との間に、軸線に対する出力部材の傾きを規制する支持部を配設したことにより、回転トルクの逆入力時、出力部材にラジアル荷重が負荷されても、軸線に対する出力部材の傾きを支持部で規制することができる。 In the present invention, by disposing a support portion that regulates the inclination of the output member with respect to the axis between the output member and the stationary member, even if a radial load is applied to the output member when the rotational torque is reversely input, the output member is loaded. The inclination of the output member with respect to the axis can be regulated by the support portion.

このように、出力部材の傾きを支持部で規制することで、出力部材の支持剛性を向上させることができ、回転トルクの逆入力時、出力部材を確実にロックすることができる。 By restricting the inclination of the output member by the support portion in this way, the support rigidity of the output member can be improved, and the output member can be reliably locked when the rotational torque is reversely input.

本発明における支持部は、出力部材の一部を静止部材に当接させた構造が望ましい。このような構造を採用すれば、出力部材を支持部により直接的に静止部材に支持することができる。 The support portion in the present invention preferably has a structure in which a part of the output member is brought into contact with the stationary member. If such a structure is adopted, the output member can be directly supported by the stationary member by the support portion.

本発明における支持部は、出力部材に組み付けられて静止部材との間に介在する中間部材の一部を静止部材に当接させた構造が望ましい。このような構造を採用すれば、出力部材を支持部により中間部材を介して間接的に静止部材に支持することができる。 The support portion in the present invention preferably has a structure in which a part of an intermediate member that is assembled to the output member and interposed between the support member and the stationary member is brought into contact with the stationary member. If such a structure is adopted, the output member can be indirectly supported by the stationary member by the support portion via the intermediate member.

本発明のレバー側クラッチ部は、レバー操作により回転トルクが入力される入力部材と、入力部材からの回転トルクをブレーキ側クラッチ部に伝達する連結部材と、入力部材と連結部材間での係合および離脱により入力部材からの回転トルクの伝達および遮断を制御する複数の係合子と、各係合子を円周方向に所定間隔で保持する保持器と、回転が拘束された静止部材と、保持器と静止部材の間に設けられ、入力部材からの回転トルクで弾性力を蓄積し、その回転トルクの開放により、蓄積された弾性力で保持器を中立状態に復帰させる第一の弾性部材と、入力部材と静止部材の間に設けられ、入力部材からの回転トルクで弾性力を蓄積し、その回転トルクの開放により、蓄積された弾性力で入力部材を中立状態に復帰させる第二の弾性部材とを備えている構造が適用可能である。 The lever-side clutch portion of the present invention is an engagement between an input member to which rotational torque is input by lever operation, a connecting member for transmitting rotational torque from the input member to the brake-side clutch portion, and the input member and the connecting member. A plurality of engagers that control the transmission and disconnection of rotational torque from the input member by disengagement, a cage that holds each engager at predetermined intervals in the circumferential direction, a stationary member whose rotation is restrained, and a cage. The first elastic member, which is provided between the stationary member and the stationary member, accumulates elastic force by the rotational torque from the input member, and returns the cage to the neutral state by the accumulated elastic force by releasing the rotational torque. A second elastic member provided between the input member and the stationary member that accumulates elastic force by the rotational torque from the input member and returns the input member to the neutral state by the accumulated elastic force by releasing the rotational torque. A structure with and is applicable.

本発明のブレーキ側クラッチ部は、レバー側クラッチ部からの回転トルクが入力される連結部材と、回転トルクが出力される出力部材と、回転が拘束された静止部材と、静止部材と出力部材間の楔すきまに配設され、両部材間での係合および離脱により連結部材からの入力トルクの伝達と出力部材からの逆入力トルクの遮断を制御する複数対の係合子と、各対の係合子間に介挿され、係合子同士に離反力を付勢する弾性部材とを備えている構造が適用可能である。 The brake-side clutch portion of the present invention includes a connecting member to which rotational torque is input from the lever-side clutch portion, an output member to which rotational torque is output, a stationary member whose rotation is restricted, and between the stationary member and the output member. A plurality of pairs of engagers, which are arranged in the wedge clearance of the two members and control the transmission of the input torque from the connecting member and the interruption of the reverse input torque from the output member by engaging and disengaging between the two members, and the engagement of each pair. It is possible to apply a structure in which an elastic member is inserted between the clutches and urges the engaging members to separate from each other.

本発明に係るクラッチユニットは、レバー側クラッチ部およびブレーキ側クラッチ部を自動車用シートリフタ部に組み込むことで自動車用途として適している。 The clutch unit according to the present invention is suitable for automobile use by incorporating the lever-side clutch portion and the brake-side clutch portion into the automobile seat lifter portion.

本発明によれば、出力部材と静止部材との間に、軸線に対する出力部材の傾きを規制する支持部を配設したことにより、回転トルクの逆入力時、出力部材にラジアル荷重が負荷されても、軸線に対する出力部材の傾きを支持部で規制することができる。これにより、出力部材の支持剛性を向上させることができ、回転トルクの逆入力時、出力部材を確実にロックすることができる。その結果、信頼性の高いクラッチユニットを提供できる。 According to the present invention, by disposing a support portion that regulates the inclination of the output member with respect to the axis between the output member and the stationary member, a radial load is applied to the output member when the rotational torque is reversely input. Also, the inclination of the output member with respect to the axis can be regulated by the support portion. As a result, the support rigidity of the output member can be improved, and the output member can be reliably locked when the rotational torque is reversely input. As a result, a highly reliable clutch unit can be provided.

本発明の実施形態で、クラッチユニットの全体構成を示す断面図である。It is sectional drawing which shows the whole structure of the clutch unit in embodiment of this invention. 図１のＰ−Ｐ線に沿う断面図である。It is sectional drawing which follows the PP line of FIG. 図１のＱ−Ｑ線に沿う断面図である。It is sectional drawing which follows the QQ line of FIG. 自動車の座席シートおよびシートリフタ部を示す構成図である。It is a block diagram which shows the seat seat and the seat lifter part of an automobile. 本発明の他の実施形態で、クラッチユニットの全体構成を示す断面図である。It is sectional drawing which shows the whole structure of the clutch unit in another embodiment of this invention. 本発明の他の実施形態で、クラッチユニットの全体構成を示す断面図である。It is sectional drawing which shows the whole structure of the clutch unit in another embodiment of this invention. クラッチユニットの全体構成を参考例として示す断面図である。It is sectional drawing which shows the whole structure of a clutch unit as a reference example. クラッチユニットの全体構成を参考例として示す断面図である。It is sectional drawing which shows the whole structure of a clutch unit as a reference example. クラッチユニットの全体構成を参考例として示す断面図である。It is sectional drawing which shows the whole structure of a clutch unit as a reference example.

本発明に係るクラッチユニットの実施形態を図面に基づいて詳述する。図１はこの実施形態のクラッチユニットの全体構成を示す断面図、図２は図１のＰ−Ｐ線に沿う断面図、図３は図１のＱ−Ｑ線に沿う断面図である。この実施形態の特徴的な構成を説明する前にクラッチユニットの全体構成を説明する。 An embodiment of the clutch unit according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the overall configuration of the clutch unit of this embodiment, FIG. 2 is a cross-sectional view taken along the line PP of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line QQ of FIG. Before explaining the characteristic configuration of this embodiment, the overall configuration of the clutch unit will be described.

この実施形態のクラッチユニット１０は、図１に示すように、入力側に設けられたレバー側クラッチ部１１と、出力側に設けられたブレーキ側クラッチ部１２とをユニット化した構造を具備する。レバー側クラッチ部１１は、レバー操作により入力される回転トルクの伝達および遮断を制御する。ブレーキ側クラッチ部１２は、レバー側クラッチ部１１から入力される回転トルクを出力側へ伝達すると共に、出力側から逆入力される回転トルクを遮断する逆入力遮断機能を有する。 As shown in FIG. 1, the clutch unit 10 of this embodiment has a structure in which a lever-side clutch portion 11 provided on the input side and a brake-side clutch portion 12 provided on the output side are unitized. The lever-side clutch portion 11 controls transmission and disconnection of rotational torque input by lever operation. The brake-side clutch unit 12 has a reverse input cutoff function that transmits the rotational torque input from the lever-side clutch unit 11 to the output side and cuts off the rotational torque that is reversely input from the output side.

レバー側クラッチ部１１は、図１および図２に示すように、レバー操作により回転トルクが入力される側板１３および外輪１４と、外輪１４から入力される回転トルクをブレーキ側クラッチ部１２に伝達する連結部材である内輪１５と、外輪１４と内輪１５との間での係合および離脱により外輪１４からの回転トルクの伝達および遮断を制御する係合子である複数の円筒ころ１６と、各円筒ころ１６を円周方向等間隔に保持する保持器１７と、保持器１７を中立状態に復帰させる第一の弾性部材である内側センタリングばね１８と、外輪１４を中立状態に復帰させる第二の弾性部材である外側センタリングばね１９とを具備する。 As shown in FIGS. 1 and 2, the lever-side clutch portion 11 transmits the rotational torque input from the outer ring 14 to the brake-side clutch portion 12 and the side plate 13 and the outer ring 14 to which the rotational torque is input by operating the lever. A plurality of cylindrical rollers 16 which are engaging elements that control transmission and disconnection of rotational torque from the outer ring 14 by engaging and disengaging the inner ring 15 which is a connecting member and the outer ring 14 and the inner ring 15, and each cylindrical roller. A cage 17 that holds 16 at equal intervals in the circumferential direction, an inner centering spring 18 that is the first elastic member that returns the cage 17 to the neutral state, and a second elastic member that returns the outer ring 14 to the neutral state. The outer centering spring 19 is provided.

レバー側クラッチ部１１において、側板１３の外周縁部に形成された爪部１３ａを、外輪１４の外周縁部に形成された切欠き凹部１４ａに挿入して加締めることにより、側板１３を外輪１４に固定し、レバー側クラッチ部１１の入力部材として一体化している。外輪１４の内周には、複数のカム面１４ｂが円周方向等間隔に形成されている。外輪１４への回転トルクの入力は、側板１３にねじ止め等により取り付けた上下方向揺動可能な操作レバー４３（図４参照）により行われる。 In the lever side clutch portion 11, the side plate 13 is crimped by inserting the claw portion 13a formed in the outer peripheral edge portion of the side plate 13 into the notch recess 14a formed in the outer peripheral edge portion of the outer ring 14. It is fixed to and integrated as an input member of the lever side clutch portion 11. A plurality of cam surfaces 14b are formed on the inner circumference of the outer ring 14 at equal intervals in the circumferential direction. The rotational torque is input to the outer ring 14 by an operating lever 43 (see FIG. 4) that can swing in the vertical direction and is attached to the side plate 13 by screwing or the like.

内輪１５は、出力軸２２が挿通される筒状部１５ａと、その筒状部１５ａのブレーキ側端部を径方向外側に延在させた拡径部１５ｂと、その拡径部１５ｂの外周端部を軸方向に屈曲させることにより突出した複数の柱部１５ｃ（図３参照）とからなる。内輪１５の筒状部１５ａの円筒状外周面１５ｄと、外輪１４の内周に形成されたカム面１４ｂとの間に楔すきま２０が形成され、その楔すきま２０に円筒ころ１６が保持器１７により円周方向等間隔で配設されている。 The inner ring 15 has a tubular portion 15a through which the output shaft 22 is inserted, a diameter-expanded portion 15b in which the brake-side end portion of the tubular portion 15a extends radially outward, and an outer peripheral end of the diameter-expanded portion 15b. It is composed of a plurality of pillar portions 15c (see FIG. 3) that protrude by bending the portions in the axial direction. A wedge clearance 20 is formed between the cylindrical outer peripheral surface 15d of the tubular portion 15a of the inner ring 15 and the cam surface 14b formed on the inner circumference of the outer ring 14, and the cylindrical roller 16 is placed in the cage 17 in the wedge clearance 20. Are arranged at equal intervals in the circumferential direction.

内側センタリングばね１８は、保持器１７とブレーキ側クラッチ部１２のカバー２４との間に配設された断面円形のＣ字状弾性部材で、その両端部を保持器１７およびカバー２４の一部に係止させている。この内側センタリングばね１８は、レバー操作により外輪１４から入力される回転トルクの作用時、静止状態にあるカバー２４に対して、外輪１４に追従する保持器１７の回転に伴って押し拡げられて弾性力が蓄積され、外輪１４から入力される回転トルクの開放時、その弾性力により保持器１７を中立状態に復帰させる。 The inner centering spring 18 is a C-shaped elastic member having a circular cross section arranged between the cage 17 and the cover 24 of the brake side clutch portion 12, and both ends thereof are part of the cage 17 and the cover 24. It is locked. The inner centering spring 18 is elastically expanded with respect to the cover 24 in a stationary state as the cage 17 following the outer ring 14 rotates when the rotational torque input from the outer ring 14 is applied by lever operation. When the force is accumulated and the rotational torque input from the outer ring 14 is released, the elastic force causes the cage 17 to return to the neutral state.

内側センタリングばね１８の径方向外側に位置する外側センタリングばね１９は、外輪１４と前述のカバー２４との間に配設されたＣ字状帯板弾性部材で、その両端部を外輪１４およびカバー２４の一部に係止させている。外側センタリングばね１９は、レバー操作により外輪１４から入力される回転トルクの作用時、静止状態にあるカバー２４に対して、外輪１４の回転に伴って押し拡げられて弾性力が蓄積され、外輪１４から入力される回転トルクの開放時、その弾性力により外輪１４を中立状態に復帰させる。 The outer centering spring 19 located on the radial outer side of the inner centering spring 18 is a C-shaped strip elastic member arranged between the outer ring 14 and the cover 24 described above, and both ends thereof are the outer ring 14 and the cover 24. It is locked in a part of. When the rotational torque input from the outer ring 14 is applied by operating the lever, the outer centering spring 19 is expanded and expanded with respect to the cover 24 in a stationary state as the outer ring 14 rotates, and the outer ring 14 accumulates elastic force. When the rotational torque input from is released, the outer ring 14 is returned to the neutral state by the elastic force.

保持器１７は、円筒ころ１６を収容する複数のポケット１７ａが円周方向等間隔に形成された樹脂製の円筒状部材である。この保持器１７の一方の軸方向端部、つまり、ブレーキ側クラッチ部１２のカバー２４側の軸方向端部には、前述の内側センタリングばね１８の両端部を係止させている。保持器１７は、径方向で外輪１４と内輪１５との間に配され、軸方向で前述の外輪１４とブレーキ側クラッチ部１２のカバー２４との間に挟み込まれている。 The cage 17 is a resin-made cylindrical member in which a plurality of pockets 17a for accommodating the cylindrical rollers 16 are formed at equal intervals in the circumferential direction. Both ends of the inner centering spring 18 are locked to one axial end of the cage 17, that is, the axial end of the brake side clutch portion 12 on the cover 24 side. The cage 17 is arranged between the outer ring 14 and the inner ring 15 in the radial direction, and is sandwiched between the outer ring 14 and the cover 24 of the brake side clutch portion 12 in the axial direction.

ロック型と称されるタイプで逆入力遮断機能を有するブレーキ側クラッチ部１２は、図１および図３に示すように、レバー側クラッチ部１１からの回転トルクが入力される連結部材である内輪１５と、レバー側クラッチ部１１からの回転トルクが出力される出力部材としての出力軸２２と、回転が拘束された外輪２３、カバー２４および側板２５と、外輪２３と出力軸２２との間での係合および離脱により、出力軸２２から逆入力される回転トルクの遮断と内輪１５から入力される回転トルクの伝達とを制御する係合子である複数対の円筒ころ２７、および各対の円筒ころ２７同士に円周方向への離反力を付勢する弾性部材である断面Ｎ字形の板ばね２８と、出力軸２２に回転抵抗を付与する摩擦リング２９とを具備する。 As shown in FIGS. 1 and 3, the brake side clutch portion 12 which is a type called a lock type and has a reverse input blocking function is an inner ring 15 which is a connecting member to which rotational torque from the lever side clutch portion 11 is input. The output shaft 22 as an output member to which the rotational torque from the lever-side clutch portion 11 is output, the outer ring 23, the cover 24 and the side plate 25 whose rotation is restricted, and the outer ring 23 and the output shaft 22. A plurality of pairs of cylindrical rollers 27, which are engagers that control the interruption of the rotational torque input back from the output shaft 22 and the transmission of the rotational torque input from the inner ring 15 by engaging and disengaging, and each pair of cylindrical rollers. It includes a leaf spring 28 having an N-shaped cross section, which is an elastic member that urges the 27s to separate from each other in the circumferential direction, and a friction ring 29 that imparts rotational resistance to the output shaft 22.

出力軸２２は、内輪１５の筒状部１５ａが外挿された軸部２２ａの軸方向中央部位に、径方向外側に延びて拡径した大径部２２ｂが一体的に形成されている。軸部２２ａの出力側端部には、シートリフタ部４１（図４参照）と連結するためのピニオンギヤ２２ｄが同軸的に形成されている。また、軸部２２ａの入力側端部にウェーブワッシャ３０を介して抜け止め部材としてのワッシャ３１を圧入することにより、レバー側クラッチ部１１の構成部品を抜け止めしている。 The output shaft 22 is integrally formed with a large diameter portion 22b extending radially outward and expanding in diameter at the axial center portion of the shaft portion 22a to which the tubular portion 15a of the inner ring 15 is extrapolated. A pinion gear 22d for connecting to the seat lifter portion 41 (see FIG. 4) is coaxially formed at the output side end portion of the shaft portion 22a. Further, by press-fitting the washer 31 as a retaining member into the input side end of the shaft portion 22a via the wave washer 30, the component parts of the lever-side clutch portion 11 are prevented from coming off.

出力軸２２の大径部２２ｂの外周には、複数の平坦なカム面２２ｅが円周方向等間隔に形成されている。大径部２２ｂのカム面２２ｅと外輪２３の円筒状内周面２３ａとの間で設けられた楔すきま２６に、二つの円筒ころ２７と二つの円筒ころ２７間に介挿された一つの板ばね２８とがそれぞれ配されている。円筒ころ２７および板ばね２８は、内輪１５の柱部１５ｃにより円周方向等間隔に配設されている。 A plurality of flat cam surfaces 22e are formed on the outer periphery of the large diameter portion 22b of the output shaft 22 at equal intervals in the circumferential direction. One plate inserted between the two cylindrical rollers 27 and the two cylindrical rollers 27 in the wedge clearance 26 provided between the cam surface 22e of the large diameter portion 22b and the cylindrical inner peripheral surface 23a of the outer ring 23. A spring 28 and a spring 28 are arranged respectively. The cylindrical roller 27 and the leaf spring 28 are arranged at equal intervals in the circumferential direction by the pillar portion 15c of the inner ring 15.

ここで、内輪１５は、レバー側クラッチ部１１の外輪１４から入力される回転トルクを出力軸２２に拡径部１５ｂを介して伝達することによりブレーキ側クラッチ部１２の入力部材として機能すると共に、円筒ころ２７および板ばね２８をポケット１５ｆに収容して円周方向等間隔に柱部１５ｃで保持することにより保持器として機能する。 Here, the inner ring 15 functions as an input member of the brake side clutch portion 12 by transmitting the rotational torque input from the outer ring 14 of the lever side clutch portion 11 to the output shaft 22 via the enlarged diameter portion 15b. The cylindrical roller 27 and the leaf spring 28 are housed in the pocket 15f and held by the column portions 15c at equal intervals in the circumferential direction, thereby functioning as a cage.

出力軸２２の大径部２２ｂには、内輪１５からの回転トルクを出力軸２２に伝達するための突起２２ｆが設けられている。突起２２ｆは、内輪１５の拡径部１５ｂに形成された孔１５ｅに円周方向のクリアランスをもって挿入配置されている。 The large diameter portion 22b of the output shaft 22 is provided with a protrusion 22f for transmitting the rotational torque from the inner ring 15 to the output shaft 22. The protrusion 22f is inserted and arranged in the hole 15e formed in the enlarged diameter portion 15b of the inner ring 15 with a clearance in the circumferential direction.

外輪２３、カバー２４および側板２５は、厚肉板状の外輪２３の外周縁部に形成された切欠き凹部２３ｂと、カバー２４の外周縁部に形成された切欠き凹部２４ａとに、側板２５の外周縁部に形成された爪部２５ａを挿入して加締めることにより、外輪２３およびカバー２４に側板２５を固定し、ブレーキ側クラッチ部１２の静止部材として一体化されている。 The outer ring 23, the cover 24, and the side plate 25 are formed by forming a notch recess 23b formed in the outer peripheral edge portion of the thick-walled plate-shaped outer ring 23 and a notch recess 24a formed in the outer peripheral edge portion of the cover 24, and the side plate 25. The side plate 25 is fixed to the outer ring 23 and the cover 24 by inserting and crimping the claw portion 25a formed on the outer peripheral edge portion of the brake side, and is integrated as a stationary member of the brake side clutch portion 12.

摩擦リング２９は、例えば、樹脂材を射出成形などによりリング状に形成した部材であり、側板２５に固着されている。この摩擦リング２９は、出力軸２２の大径部２２ｂに形成された環状凹部２２ｃの内周面２２ｇに締め代をもって圧入される。摩擦リング２９の外周面２９ｂと出力軸２２の環状凹部２２ｃの内周面２２ｇとの間に生じる摩擦力によって、レバー操作時、出力軸２２に回転抵抗が付与される。 The friction ring 29 is, for example, a member obtained by forming a resin material into a ring shape by injection molding or the like, and is fixed to the side plate 25. The friction ring 29 is press-fitted into the inner peripheral surface 22g of the annular recess 22c formed in the large diameter portion 22b of the output shaft 22 with a tightening margin. Rotational resistance is imparted to the output shaft 22 when the lever is operated by the frictional force generated between the outer peripheral surface 29b of the friction ring 29 and the inner peripheral surface 22g of the annular recess 22c of the output shaft 22.

以上の構成からなるレバー側クラッチ部１１およびブレーキ側クラッチ部１２の動作例を以下に説明する。 An operation example of the lever-side clutch portion 11 and the brake-side clutch portion 12 having the above configuration will be described below.

レバー側クラッチ部１１では、レバー操作により外輪１４に回転トルクが入力されると、円筒ころ１６が外輪１４のカム面１４ｂと内輪１５の円筒状外周面１５ｄとの間の楔すきま２０に係合する。この楔すきま２０での円筒ころ１６の係合により、内輪１５に回転トルクが伝達されて内輪１５が回転する。この時、外輪１４および保持器１７の回転に伴って両センタリングばね１８，１９に弾性力が蓄積される。 In the lever-side clutch portion 11, when a rotational torque is input to the outer ring 14 by lever operation, the cylindrical roller 16 engages with the wedge clearance 20 between the cam surface 14b of the outer ring 14 and the cylindrical outer peripheral surface 15d of the inner ring 15. To do. By engaging the cylindrical rollers 16 in the wedge clearance 20, rotational torque is transmitted to the inner ring 15 to rotate the inner ring 15. At this time, elastic force is accumulated in both centering springs 18 and 19 as the outer ring 14 and the cage 17 rotate.

回転トルクの入力がなくなると、両センタリングばね１８，１９の弾性力により保持器１７および外輪１４が中立状態に復帰する。一方で、内輪１５は、与えられた回転位置をそのまま維持する。従って、外輪１４の回転繰り返し、つまり、操作レバーのポンピング操作により、内輪１５は寸動回転する。 When the input of the rotational torque is lost, the cage 17 and the outer ring 14 are returned to the neutral state by the elastic force of both the centering springs 18 and 19. On the other hand, the inner ring 15 maintains the given rotation position as it is. Therefore, the inner ring 15 rotates by repeating the rotation of the outer ring 14, that is, by the pumping operation of the operating lever.

ブレーキ側クラッチ部１２では、座席シートへの着座により出力軸２２に回転トルクが逆入力されても、円筒ころ２７が出力軸２２のカム面２２ｅと外輪２３の円筒状内周面２３ａとの間の楔すきま２６に係合して出力軸２２が外輪２３に対してロックされる。このようにして、出力軸２２から逆入力された回転トルクは、ブレーキ側クラッチ部１２によってロックされてレバー側クラッチ部１１への還流が遮断される。 In the brake side clutch portion 12, even if the rotational torque is reversely input to the output shaft 22 due to seating on the seat, the cylindrical roller 27 is between the cam surface 22e of the output shaft 22 and the cylindrical inner peripheral surface 23a of the outer ring 23. The output shaft 22 is locked with respect to the outer ring 23 by engaging with the wedge clearance 26 of the above. In this way, the rotational torque reversely input from the output shaft 22 is locked by the brake side clutch portion 12 to block the return to the lever side clutch portion 11.

一方、レバー操作によりレバー側クラッチ部１１の内輪１５からの回転トルクがその柱部１５ｃに入力されると、柱部１５ｃが円筒ころ２７と当接して板ばね２８の弾性力に抗して円筒ころ２７を押圧する。これにより、円筒ころ２７が楔すきま２６から離脱し、この楔すきま２６からの円筒ころ２７の離脱により出力軸２２のロック状態が解除され、出力軸２２は回転可能となる。この出力軸２２のロック状態の解除時、摩擦リング２９により出力軸２２に回転抵抗が付与される。 On the other hand, when the rotational torque from the inner ring 15 of the lever-side clutch portion 11 is input to the column portion 15c by lever operation, the column portion 15c comes into contact with the cylindrical roller 27 and is cylindrical against the elastic force of the leaf spring 28. Press the roller 27. As a result, the cylindrical roller 27 is separated from the wedge clearance 26, and the locked state of the output shaft 22 is released by the separation of the cylindrical roller 27 from the wedge clearance 26, so that the output shaft 22 can rotate. When the locked state of the output shaft 22 is released, a rotational resistance is applied to the output shaft 22 by the friction ring 29.

内輪１５の柱部１５ｃがさらに回転すると、内輪１５の拡径部１５ｂの孔１５ｅと出力軸２２の大径部２２ｂの突起２２ｆとのクリアランスが詰まって内輪１５の拡径部１５ｂが出力軸２２の突起２２ｆに回転方向で当接する。これにより、レバー側クラッチ部１１からの回転トルクは、突起２２ｆを介して出力軸２２に伝達されて出力軸２２が回転する。つまり、内輪１５の柱部１５ｃが寸動回転すると、出力軸２２も寸動回転することになる。 When the pillar portion 15c of the inner ring 15 further rotates, the clearance between the hole 15e of the enlarged diameter portion 15b of the inner ring 15 and the protrusion 22f of the large diameter portion 22b of the output shaft 22 is closed, and the enlarged diameter portion 15b of the inner ring 15 becomes the output shaft 22. In contact with the protrusion 22f of the above in the rotational direction. As a result, the rotational torque from the lever-side clutch portion 11 is transmitted to the output shaft 22 via the protrusion 22f, and the output shaft 22 rotates. That is, when the pillar portion 15c of the inner ring 15 oscillates, the output shaft 22 also oscillates.

以上で詳述した構造を具備するクラッチユニット１０は、レバー操作により座席シートの高さ調整を行う自動車用シートリフタ部４１に組み込まれて使用される。図４は自動車の乗員室に装備される座席シート４０を示す。 The clutch unit 10 having the structure described in detail above is used by being incorporated in the automobile seat lifter portion 41 that adjusts the height of the seat by lever operation. FIG. 4 shows a seat 40 installed in the passenger compartment of an automobile.

座席シート４０は、図４に示すように、着座シート４８と背もたれシート４２とで構成され、シートリフタ部４１により着座シート４８の座面を高さ調整する。着座シート４８の高さ調整は、クラッチユニット１０におけるレバー側クラッチ部１１（図１参照）の側板１３に取り付けられた操作レバー４３によって行う。 As shown in FIG. 4, the seat seat 40 is composed of a seat seat 48 and a backrest seat 42, and the height of the seat surface of the seat seat 48 is adjusted by the seat lifter portion 41. The height of the seat 48 is adjusted by the operating lever 43 attached to the side plate 13 of the lever-side clutch portion 11 (see FIG. 1) in the clutch unit 10.

シートリフタ部４１は、以下の構造を具備する。スライド可動部材４４にリンク部材４５，４６の一端がそれぞれ回動自在に枢着されている。リンク部材４５，４６の他端はそれぞれ着座シート４８に回動自在に枢着されている。リンク部材４５の他端にはセクターギヤ４７が一体的に設けられている。セクターギヤ４７はクラッチユニット１０の出力軸２２のピニオンギヤ２２ｄに噛合している。 The seat lifter portion 41 has the following structure. One ends of the link members 45 and 46 are rotatably pivotally attached to the slide movable member 44, respectively. The other ends of the link members 45 and 46 are rotatably pivotally attached to the seat 48, respectively. A sector gear 47 is integrally provided at the other end of the link member 45. The sector gear 47 meshes with the pinion gear 22d of the output shaft 22 of the clutch unit 10.

例えば、着座シート４８の座面を低くする場合、レバー側クラッチ部１１でのレバー操作、つまり、操作レバー４３を下側へ揺動させることにより、ブレーキ側クラッチ部１２（図１参照）のロック状態を解除する。このブレーキ側クラッチ部１２でのロック解除時、摩擦リング２９（図１参照）により出力軸２２に適正な回転抵抗を付与することで、着座シート４８の座面をスムーズに低くすることができる。 For example, when lowering the seating surface of the seat 48, the lever is operated by the lever-side clutch portion 11, that is, the operation lever 43 is swung downward to lock the brake-side clutch portion 12 (see FIG. 1). Release the state. When the brake side clutch portion 12 is unlocked, the seat surface of the seat 48 can be smoothly lowered by applying an appropriate rotational resistance to the output shaft 22 by the friction ring 29 (see FIG. 1).

ブレーキ側クラッチ部１２でのロック解除により、レバー側クラッチ部１１からブレーキ側クラッチ部１２に伝達された回転トルクでもって、ブレーキ側クラッチ部１２の出力軸２２のピニオンギヤ２２ｄが時計方向（図４の矢印方向）に回動する。そして、ピニオンギヤ２２ｄと噛合するセクターギヤ４７が反時計方向（図４の矢印方向）に揺動し、リンク部材４５とリンク部材４６が共に傾倒して着座シート４８の座面が低くなる。 By releasing the lock at the brake side clutch portion 12, the pinion gear 22d of the output shaft 22 of the brake side clutch portion 12 is rotated clockwise by the rotational torque transmitted from the lever side clutch portion 11 to the brake side clutch portion 12 (FIG. 4). Rotate in the direction of the arrow). Then, the sector gear 47 that meshes with the pinion gear 22d swings counterclockwise (in the direction of the arrow in FIG. 4), and the link member 45 and the link member 46 both tilt to lower the seating surface of the seat 48.

このようにして、着座シート４８の座面を高さ調整した後、操作レバー４３を開放すると、操作レバー４３が両センタリングばね１８，１９の弾性力によって上側へ揺動して元の位置（中立状態）に戻る。なお、操作レバー４３を上側へ揺動させた場合は、前述とは逆の動作で着座シート４８の座面が高くなる。着座シート４８の高さ調整後に操作レバー４３を開放すると、操作レバー４３が下側へ揺動して元の位置（中立状態）に戻る。 After adjusting the height of the seating surface of the seat 48 in this way, when the operating lever 43 is opened, the operating lever 43 swings upward due to the elastic force of both centering springs 18 and 19, and is in the original position (neutral). Return to state). When the operating lever 43 is swung upward, the seating surface of the seating seat 48 rises in the reverse operation of the above. When the operating lever 43 is opened after adjusting the height of the seat 48, the operating lever 43 swings downward and returns to the original position (neutral state).

この実施形態におけるクラッチユニット１０の全体構成、およびこのクラッチユニット１０が組み込まれるシートリフタ部４１は、前述のとおりであるが、クラッチユニット１０の特徴的な構成について、以下に詳述する。 The overall configuration of the clutch unit 10 and the seat lifter portion 41 into which the clutch unit 10 is incorporated in this embodiment are as described above, but the characteristic configuration of the clutch unit 10 will be described in detail below.

このクラッチユニット１０は、ブレーキ側クラッチ部１２の出力軸２２が、座席シート４０を上下調整するシートリフタ部４１に連結された構造を具備する。つまり、出力軸２２のピニオンギヤ２２ｄがシートリフタ部４１のセクターギヤ４７と噛合した構造を具備する（図４参照）。 The clutch unit 10 has a structure in which the output shaft 22 of the brake side clutch portion 12 is connected to the seat lifter portion 41 that vertically adjusts the seat seat 40. That is, the pinion gear 22d of the output shaft 22 has a structure in which it meshes with the sector gear 47 of the seat lifter portion 41 (see FIG. 4).

このブレーキ側クラッチ部１２では、座席シート４０への着座による出力軸２２への回転トルクの逆入力時、出力軸２２のピニオンギヤ２２ｄとシートリフタ部４１のセクターギヤ４７との連結部分でラジアル荷重が発生する。 In the brake side clutch portion 12, a radial load is generated at the connecting portion between the pinion gear 22d of the output shaft 22 and the sector gear 47 of the seat lifter portion 41 when the rotational torque is reversely input to the output shaft 22 when seated on the seat 40. To do.

このようなラジアル荷重が出力軸２２に負荷されると、外輪２３に対して出力軸２２がその軸線に対して傾くことになる。そこで、ブレーキ側クラッチ部１２では、軸線に対する出力軸２２の傾きを規制する支持部を出力軸２２と外輪２３との間に配設している。 When such a radial load is applied to the output shaft 22, the output shaft 22 is tilted with respect to the outer ring 23 with respect to the axis. Therefore, in the brake side clutch portion 12, a support portion that regulates the inclination of the output shaft 22 with respect to the axis is arranged between the output shaft 22 and the outer ring 23.

図１に示す実施形態のブレーキ側クラッチ部１２における支持部は、軸方向に突出する環状凸部２５ｂを側板２５の内側端面に形成した構造を具備する。この支持部では、環状凸部２５ｂの外周面２５ｃと外輪２３の円筒状内周面２３ａとを当接させると共に、環状凸部２５ｂの内周面２５ｄと出力軸２２の円筒状外周面２２ｈとを当接させている。 The support portion of the brake side clutch portion 12 of the embodiment shown in FIG. 1 has a structure in which an annular convex portion 25b protruding in the axial direction is formed on the inner end surface of the side plate 25. In this support portion, the outer peripheral surface 25c of the annular convex portion 25b and the cylindrical inner peripheral surface 23a of the outer ring 23 are brought into contact with each other, and the inner peripheral surface 25d of the annular convex portion 25b and the cylindrical outer peripheral surface 22h of the output shaft 22 are brought into contact with each other. Are in contact with each other.

ここで、出力軸２２の大径部２２ｂの外周には平坦なカム面２２ｅが形成されていることから、その大径部２２ｂの軸方向端部に段差部２２ｉを形成し、この段差部２２ｉに円筒状外周面２２ｈを形成している。そして、この円筒状外周面２２ｈに側板２５の環状凸部２５ｂの内周面２５ｄを当接させている。 Here, since a flat cam surface 22e is formed on the outer circumference of the large diameter portion 22b of the output shaft 22, a step portion 22i is formed at the axial end portion of the large diameter portion 22b, and the step portion 22i is formed. A cylindrical outer peripheral surface 22h is formed on the surface. Then, the inner peripheral surface 25d of the annular convex portion 25b of the side plate 25 is brought into contact with the cylindrical outer peripheral surface 22h.

このように、出力軸２２の円筒状外周面２２ｈを側板２５の環状凸部２５ｂの内周面２５ｄ（第一円筒面）に当接させ、その環状凸部２５ｂの外周面２５ｃ（第二円筒面）を外輪２３の円筒状内周面２３ａに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができる。これにより、出力軸２２は傾くことがないので、出力軸２２の円筒ころ２７との接触面であるカム面２２ｅが傾くことはなく、出力軸２２の支持剛性を向上させることができる。 In this way, the cylindrical outer peripheral surface 22h of the output shaft 22 is brought into contact with the inner peripheral surface 25d (first cylindrical surface) of the annular convex portion 25b of the side plate 25, and the outer peripheral surface 25c (second cylinder ) of the annular convex portion 25b is brought into contact with the inner peripheral surface 25d (first cylindrical surface). The output shaft 22 with respect to the axis even if a radial load is applied to the output shaft 22 when the rotational torque is reversely input to the output shaft 22 by the support portion in which the surface) is brought into contact with the cylindrical inner peripheral surface 23a of the outer ring 23. The inclination of the can be regulated by the support part. As a result, since the output shaft 22 does not tilt, the cam surface 22e, which is the contact surface of the output shaft 22 with the cylindrical roller 27, does not tilt, and the support rigidity of the output shaft 22 can be improved.

その結果、その出力軸２２のカム面２２ｅに対して円筒ころ２７が滑って円筒ころ２７の姿勢が変化するスキューが発生することを防止できる。この円筒ころ２７のスキュー発生を防止できることで、出力軸２２を確実にロックすることができる。 As a result, it is possible to prevent the cylindrical roller 27 from slipping on the cam surface 22e of the output shaft 22 and causing a skew in which the posture of the cylindrical roller 27 changes. By preventing the skew of the cylindrical roller 27 from occurring, the output shaft 22 can be reliably locked.

図１に示す実施形態では、軸方向に突出する環状凸部２５ｂを側板２５の内側端面に形成した構造の支持部について説明したが、本発明はこれに限定されることなく、図５および図６に示すような構造を具備した支持部であってもよい。 In the embodiment shown in FIG. 1, a support portion having a structure in which an annular convex portion 25b protruding in the axial direction is formed on the inner end surface of the side plate 25 has been described, but the present invention is not limited to this, and FIGS. The support portion may have a structure as shown in 6.

図５に示す実施形態の支持部は、径方向外側へ延びるフランジ部２２ｊを出力軸２２の大径部２２ｂの軸方向端部に一体的に形成した構造を具備する。この支持部では、出力軸２２のフランジ部２２ｊの外周面２２ｋ（円筒面）と外輪２３の円筒状内周面２３ａとを当接させている。 The support portion of the embodiment shown in FIG. 5 has a structure in which a flange portion 22j extending outward in the radial direction is integrally formed with an axial end portion of the large diameter portion 22b of the output shaft 22. In this support portion, the outer peripheral surface 22k (cylindrical surface) of the flange portion 22j of the output shaft 22 and the cylindrical inner peripheral surface 23a of the outer ring 23 are brought into contact with each other.

このように、出力軸２２のフランジ部２２ｊの外周面２２ｋを外輪２３の円筒状内周面２３ａに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができるので、出力軸２２を確実にロックすることができる。 In this way, the support portion in which the outer peripheral surface 22k of the flange portion 22j of the output shaft 22 is brought into contact with the cylindrical inner peripheral surface 23a of the outer ring 23 causes the output shaft 22 to receive a reverse input of rotational torque to the output shaft 22. Even if a radial load is applied, the inclination of the output shaft 22 with respect to the axis can be regulated by the support portion, so that the output shaft 22 can be reliably locked.

図６に示す実施形態の支持部は、径方向内側へ延びるフランジ部２３ｃを外輪２３の軸方向端部に一体的に形成した構造を具備する。この支持部では、外輪２３のフランジ部２３ｃの円筒状内周面２３ｄと出力軸２２の円筒状外周面２２ｈ（円筒面）とを当接させている。 The support portion of the embodiment shown in FIG. 6 has a structure in which a flange portion 23c extending inward in the radial direction is integrally formed at an axial end portion of the outer ring 23. In this support portion, the cylindrical inner peripheral surface 23d of the flange portion 23c of the outer ring 23 and the cylindrical outer peripheral surface 22h (cylindrical surface) of the output shaft 22 are brought into contact with each other.

この場合も、前述した図１の実施形態と同様、出力軸２２の大径部２２ｂの外周には平坦なカム面２２ｅが形成されていることから、その大径部２２ｂの軸方向端部に段差部２２ｉを形成し、この段差部２２ｉに円筒状外周面２２ｈを形成している。そして、この円筒状外周面２２ｈに外輪２３のフランジ部２３ｃの内周面２３ｄを当接させている。 In this case as well, as in the embodiment of FIG. 1 described above, since the flat cam surface 22e is formed on the outer circumference of the large diameter portion 22b of the output shaft 22, the axial end portion of the large diameter portion 22b is formed. A step portion 22i is formed, and a cylindrical outer peripheral surface 22h is formed on the step portion 22i. Then, the inner peripheral surface 23d of the flange portion 23c of the outer ring 23 is brought into contact with the cylindrical outer peripheral surface 22h.

このように、外輪２３のフランジ部２３ｃの内周面２３ｄを出力軸２２の円筒状外周面２２ｈに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができるので、出力軸を確実にロックすることができる。 In this way, the support portion in which the inner peripheral surface 23d of the flange portion 23c of the outer ring 23 is brought into contact with the cylindrical outer peripheral surface 22h of the output shaft 22 causes the output shaft 22 to receive a reverse input of rotational torque to the output shaft 22. Even if a radial load is applied, the inclination of the output shaft 22 with respect to the axis can be regulated by the support portion, so that the output shaft can be reliably locked.

以上で説明した実施形態では、図１、図５および図６に示すように、出力軸２２の一部を静止部材である側板２５および外輪２３に当接させた構造を具備する。この構造の場合、出力軸２２を支持部により直接的に側板２５および外輪２３に支持することになる。出力軸２２を支持部により直接的に側板２５および外輪２３に支持する構造以外に、出力軸２２を支持部により間接的に静止部材である外輪２３あるいはカバー２４に支持する構造であってもよい。 In the embodiment described above, as shown in FIGS. 1, 5 and 6, a structure is provided in which a part of the output shaft 22 is brought into contact with the side plate 25 and the outer ring 23 which are stationary members. In the case of this structure, the output shaft 22 is directly supported by the side plate 25 and the outer ring 23 by the support portion. In addition to the structure in which the output shaft 22 is directly supported by the side plate 25 and the outer ring 23 by the support portion, the structure may be such that the output shaft 22 is indirectly supported by the outer ring 23 or the cover 24 which is a stationary member by the support portion. ..

出力軸２２を支持部により間接的に外輪２３に支持する構造として、図７〜図９に示すように、出力軸２２に組み付けられて外輪２３との間に介在する中間部材である内輪１５の一部を外輪２３およびカバー２４に当接させた構造の支持部であってもよい。内輪１５は、その筒状部１５ａを出力軸２２の軸部２２ａに外挿することにより出力軸２２に組み付けられている。 As a structure in which the output shaft 22 is indirectly supported by the outer ring 23 by the support portion, as shown in FIGS. 7 to 9, the inner ring 15 which is an intermediate member assembled to the output shaft 22 and interposed between the outer ring 23 and the outer ring 23. It may be a support portion having a structure in which a part thereof is brought into contact with the outer ring 23 and the cover 24. The inner ring 15 is assembled to the output shaft 22 by extrapolating the tubular portion 15a to the shaft portion 22a of the output shaft 22.

図７に参考例として示す支持部は、径方向内側に突出した環状凸部２３ｅを外輪２３の軸方向端部の内周面に一体的に形成した構造を具備する。この支持部では、外輪２３の環状凸部２３ｅの内周面２３ｆと内輪１５の柱部１５ｃの外周面１５ｆとを当接させている。 The support portion shown as a reference example in FIG. 7 has a structure in which an annular convex portion 23e protruding inward in the radial direction is integrally formed on the inner peripheral surface of the axial end portion of the outer ring 23. In this support portion, the inner peripheral surface 23f of the annular convex portion 23e of the outer ring 23 and the outer peripheral surface 15f of the pillar portion 15c of the inner ring 15 are brought into contact with each other.

このように、出力軸２２に組み付けられた内輪１５の柱部１５ｃの外周面１５ｆを外輪２３の環状凸部２３ｅの内周面２３ｆに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができるので、出力軸２２を確実にロックすることができる。 In this way, the rotational torque to the output shaft 22 is generated by the support portion in which the outer peripheral surface 15f of the pillar portion 15c of the inner ring 15 assembled to the output shaft 22 is brought into contact with the inner peripheral surface 23f of the annular convex portion 23e of the outer ring 23. Even if a radial load is applied to the output shaft 22 at the time of reverse input, the inclination of the output shaft 22 with respect to the axis can be regulated by the support portion, so that the output shaft 22 can be reliably locked.

図８に参考例として示す支持部は、内輪１５の柱部１５ｃを拡径させた構造を具備する。この支持部では、外輪２３の内周面２３ａと内輪１５の柱部１５ｃの外周面１５ｇとを当接させている。 The support portion shown as a reference example in FIG. 8 has a structure in which the pillar portion 15c of the inner ring 15 has an enlarged diameter. In this support portion, the inner peripheral surface 23a of the outer ring 23 and the outer peripheral surface 15g of the pillar portion 15c of the inner ring 15 are brought into contact with each other.

このように、出力軸２２に組み付けられた内輪１５の柱部１５ｃを拡径させてその外周面１５ｇを外輪２３の内周面２３ａに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができるので、出力軸２２を確実にロックすることができる。 In this way, the rotation torque to the output shaft 22 is generated by the support portion in which the pillar portion 15c of the inner ring 15 assembled to the output shaft 22 is expanded in diameter and the outer peripheral surface 15g thereof is brought into contact with the inner peripheral surface 23a of the outer ring 23. Even if a radial load is applied to the output shaft 22 at the time of reverse input, the inclination of the output shaft 22 with respect to the axis can be regulated by the support portion, so that the output shaft 22 can be reliably locked.

図９に参考例として示す支持部は、軸方向に延びる筒状部２４ｂをカバー２４の内周に一体的に形成した構造を具備する。この支持部では、カバー２４の筒状部２４ｂの内周面２４ｃと内輪１５の筒状部１５ａの外周面１５ｈとを当接させている。 The support portion shown as a reference example in FIG. 9 has a structure in which a tubular portion 24b extending in the axial direction is integrally formed on the inner circumference of the cover 24. In this support portion, the inner peripheral surface 24c of the tubular portion 24b of the cover 24 and the outer peripheral surface 15h of the tubular portion 15a of the inner ring 15 are brought into contact with each other.

このように、出力軸２２に組み付けられた内輪１５の筒状部１５ａの外周面１５ｈをカバー２４の筒状部２４ｂの内周面２４ｃに当接させた支持部により、出力軸２２への回転トルクの逆入力時、出力軸２２にラジアル荷重が負荷されても、軸線に対する出力軸２２の傾きを支持部で規制することができるので、出力軸２２を確実にロックすることができる。 In this way, the support portion in which the outer peripheral surface 15h of the tubular portion 15a of the inner ring 15 assembled to the output shaft 22 is brought into contact with the inner peripheral surface 24c of the tubular portion 24b of the cover 24 rotates to the output shaft 22. Even if a radial load is applied to the output shaft 22 when the torque is reversely input, the inclination of the output shaft 22 with respect to the axis can be regulated by the support portion, so that the output shaft 22 can be reliably locked.

本発明は前述した実施形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。 The present invention is not limited to the above-described embodiments, and it goes without saying that the present invention can be carried out in various forms without departing from the gist of the present invention. Indicated by the scope of the claim and further includes the equal meaning described in the claims, and all modifications within the scope.

１０クラッチユニット
１１レバー側クラッチ部
１２ブレーキ側クラッチ部
１５ｃ支持部（柱部）
２２出力部材（出力軸）
２２ｊ支持部（フランジ部）
２３静止部材（外輪）
２３ｃ支持部（フランジ部）
２３ｅ支持部（環状凸部）
２４静止部材（カバー）
２４ｂ支持部（筒状部）
２５静止部材（側板）
２５ｂ支持部（環状凸部）
４１シートリフタ部 10 Clutch unit 11 Lever side clutch part 12 Brake side clutch part 15c Support part (pillar part)
22 Output member (output shaft)
22j Support part (flange part)
23 Stationary member (outer ring)
23c Support part (flange part)
23e Support part (annular convex part)
24 Stationary member (cover)
24b Support part (cylindrical part)
25 Stationary member (side plate)
25b Support part (annular convex part)
41 Seat lifter

Claims

A lever-side clutch unit provided on the input side that controls transmission and disconnection of rotational torque input by lever operation, and a rotational torque unit provided on the output side that transmits rotational torque input from the lever-side clutch unit to the output side. It consists of a clutch on the brake side that shuts off the rotational torque that is input backward from the output side.
The brake-side clutch portion includes a connecting member to which rotational torque is input from the lever-side clutch portion, an output member to which rotational torque is output, an outer ring whose rotation is restricted, and a wedge gap between the outer ring and the output member. It is provided with an engaging element that controls transmission of input torque from the connecting member and interruption of reverse input torque from the output member by engaging and disengaging between both members, and a side plate fixed to the outer ring. ,
The side plate is provided with a first cylindrical surface that contacts the cylindrical outer peripheral surface of the output member and a second cylindrical surface that contacts the cylindrical inner peripheral surface of the outer ring, and between the output member and the outer ring, A clutch unit characterized in that a support portion for regulating the inclination of an output member with respect to an axis is provided.

A lever-side clutch unit provided on the input side that controls transmission and disconnection of rotational torque input by lever operation, and a rotational torque unit provided on the output side that transmits rotational torque input from the lever-side clutch unit to the output side. It consists of a clutch on the brake side that shuts off the rotational torque that is input backward from the output side.
The brake-side clutch portion includes a connecting member to which rotational torque is input from the lever-side clutch portion, an output member to which rotational torque is output, an outer ring whose rotation is restricted, and a wedge gap between the outer ring and the output member. It is provided with an engager that controls the transmission of input torque from the connecting member and the interruption of the reverse input torque from the output member by engaging and disengaging between both members.
The output member is provided with a cylindrical surface that comes into contact with the cylindrical inner peripheral surface of the outer ring, and a support portion that regulates the inclination of the output member with respect to the axis is provided between the output member and the outer ring. A featured clutch unit.

The lever-side clutch portion includes an input member to which rotational torque is input by lever operation, a connecting member that transmits rotational torque from the input member to the brake-side clutch portion, and engagement between the input member and the connecting member. A plurality of engaging elements that control transmission and disconnection of rotational torque from the input member by detachment, a cage that holds each engaging element at predetermined intervals in the circumferential direction, a stationary member whose rotation is restricted, and the cage. A first elastic member provided between the stationary member and the stationary member, which accumulates an elastic force by a rotational torque from an input member and returns the cage to a neutral state by the accumulated elastic force by releasing the rotational torque. Second elasticity, which is provided between the input member and the stationary member, accumulates elastic force by the rotational torque from the input member, and returns the input member to the neutral state by the accumulated elastic force by releasing the rotational torque. The clutch unit according to claim 1 or 2, further comprising a member.

The brake side clutch portion includes a plurality of pairs of the engaging elements, and further includes an elastic member inserted between the engaging elements to urge the engaging elements to separate from each other, according to claim 1 or 2. The clutch unit described in.

The clutch unit according to any one of claims 1 to 4 , wherein the lever-side clutch portion and the brake-side clutch portion are incorporated in an automobile seat lifter portion.