JP2008200442A - Reclining device of automobile seat - Google Patents

Reclining device of automobile seat Download PDF

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JP2008200442A
JP2008200442A JP2007043102A JP2007043102A JP2008200442A JP 2008200442 A JP2008200442 A JP 2008200442A JP 2007043102 A JP2007043102 A JP 2007043102A JP 2007043102 A JP2007043102 A JP 2007043102A JP 2008200442 A JP2008200442 A JP 2008200442A
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contact
pair
peripheral surface
wedge
pressed
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Tetsuya Oba
徹也 大庭
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Jtekt Column Systems Corp
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Fuji Kiko Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a pair of wedges are engaged by the energizing force of a spring, and frictional resistance is large and they are not easily detached when a drive bush pressurizes and moves the wedges in a direction to be detached from engagement. <P>SOLUTION: While an outer side contact 5d in point contact with the inner peripheral surface 2e of a second gear body 2 is provided on the outer peripheral surface 5b of a pair of wedges 5, an inner side contact 5e in point contact with the outer peripheral surface 1e of the bearing cylinder part 1d of a first gear body 1 is provided on the inner peripheral surface 5c of the pair of wedges 5. The angle of a surface 5f to be pressurized formed at the respective distal ends of the pair of wedges 5 to be pressurized by the pressurizing part 3c of the drive bush 3, is set so that a pressurizing direction line 8 which passes through a first abutting point 5g to which the pressurizing part 3c abuts on the surface 5f to be pressurized and is roughly perpendicular to the surface 5f to be pressurized is positioned between the outer side contact 5d and the inner side contact 5e. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車シートのリクライニング装置に関し、円形の偏心空間に設けられた一対の楔部材が、駆動開始時に容易に移動するようにしたものである。   The present invention relates to a reclining device for an automobile seat, in which a pair of wedge members provided in a circular eccentric space are easily moved at the start of driving.

自動車シートのリクライニング装置におけるバックシートの角度調整機構には、差動伝動機構が採用され、電動により高い減速比でバックシートを回動させるようになっている。   A differential transmission mechanism is adopted as an angle adjustment mechanism of the back seat in the reclining device for an automobile seat, and the back seat is rotated at a high reduction ratio by electric drive.

このように差動伝動機構を採用した従来の自動車シートのリクライニング装置としては、特許文献１のものがある。これは、シートクッションと該シートクッションに対して下端が回動自在に設けられたシートバックとのいずれか一方に結合されて内歯歯車を有する第１部材と、他方に結合されて前記内歯歯車よりも歯数が少ない外歯歯車を有する第２部材と、前記内歯歯車と前記外歯歯車とを噛み合わせることにより、前記第１部材に形成され前記内歯歯車と同心の軸受筒部の外周面と、前記第２部材に形成され前記外歯歯車と同心の内周面との間に形成される円形の偏心空間に配置された一対の楔部材と、該一対の楔部材を円周方向の相互に離反する方向へ付勢する付勢手段と、前記偏心空間に挿入され前記一対の楔部材を円周方向に沿って押圧して回動させることにより、前記内歯歯車に対して前記外歯歯車が噛み合う噛合部を円周に沿って移動させ、前記第１部材に対して前記第２部材を前記噛合部の旋回方向とは反対方向へ減速して相対的に回転させる入力部材とを設けたものである。   As a conventional reclining device for an automobile seat that employs a differential transmission mechanism as described above, there is one disclosed in Patent Document 1. This includes a first member coupled to one of a seat cushion and a seat back having a lower end pivotably provided with respect to the seat cushion, and having an internal gear and the other coupled to the inner tooth. A bearing cylinder portion formed on the first member and concentric with the internal gear by meshing the second gear having an external gear with fewer teeth than the gear and the internal gear and the external gear. And a pair of wedge members disposed in a circular eccentric space formed between the outer peripheral surface of the second member and the inner peripheral surface concentric with the external gear, and the pair of wedge members A biasing means that biases the circumferential direction away from each other; and a pair of wedge members that are inserted into the eccentric space and are pressed and rotated along the circumferential direction to thereby rotate the internal gear. And move the meshing portion with which the external gear meshes along the circumference. Wherein the said second member turning direction of the meshing portion with respect to the first member is provided with a input member is relatively rotated at a reduced speed in the opposite direction.

入力部材を偏心空間に挿入して一対の楔部材の全体を円周方向に沿って押圧して旋回させることにより、内歯歯車に対して外歯歯車が噛み合う噛合部を円周に沿って移動させ、第１部材に対して第２部材を噛合部の旋回方向とは反対方向へ相対的にて回転させ、大きな減速比で減速することができる。
特開２００６−０９４９９１号公報 特開２００２−１１２８４８号公報 By moving the input member into the eccentric space and pressing the entire pair of wedge members along the circumferential direction and turning, the meshing portion where the external gear meshes with the internal gear moves along the circumference. Then, the second member can be rotated relative to the first member in the direction opposite to the turning direction of the meshing portion to decelerate at a large reduction ratio.
JP 2006-049991 A JP 2002-112848 A

ところが、円形の偏心空間に挿入した一対の楔部材は、その外周側の面と内周側の面とが前記第１部材に形成され前記内歯歯車と同心の軸受筒部の外周面と、前記第２部材に形成され前記外歯歯車と同心の内周面とに点接触で接触しており、付勢手段の付勢力によって食い込んでいることから、入力部材が回転を始めて一対の楔部材の一方を付勢手段の付勢力に抗して押圧し、食い込みから外れる方向へ移動させようとする際に摩擦抵抗が大きく抜けにくいという問題がある。   However, the pair of wedge members inserted into the circular eccentric space has an outer peripheral surface and an inner peripheral surface formed on the first member, and the outer peripheral surface of the bearing tube portion concentric with the internal gear, Since the second member is formed in point contact with the outer peripheral gear and the inner peripheral surface concentric with the external gear, the input member begins to rotate and the pair of wedge members starts rotating. One of these is pressed against the urging force of the urging means, and there is a problem that the frictional resistance is not easily removed when trying to move in a direction away from the bite.

一方、引用文献２のように、楔部材の基端部側の上面に段部が形成されており、該段部の側壁を入力部材が押圧して一対の楔部材を円周方向へ押し出す構成にすることもできるが、楔部材に段部を形成することになるため、楔部材の加工時間が多くなるという問題がある。   On the other hand, as in Patent Document 2, a step is formed on the upper surface of the wedge member on the base end side, and the input member presses the side wall of the step to push the pair of wedge members in the circumferential direction. However, since the step portion is formed on the wedge member, there is a problem that the processing time of the wedge member increases.

また、楔部材自体の円周方向の全長を小さくすれば、入力部材が楔部材を押圧する部分は楔部材の端面であって、かつ楔部材の基端部の近傍を押圧することになるが、今度は楔部材の全長が短いため、入力部材が楔部材を押圧した際に楔部材の全体が回転して軸受筒部の外周面と第２部材に形成され外歯歯車と同心の内周面との中へ入り込みにくくなるという新たな問題が生じる。   Further, if the overall length of the wedge member itself in the circumferential direction is reduced, the portion where the input member presses the wedge member is the end surface of the wedge member and presses the vicinity of the proximal end portion of the wedge member. In this case, since the entire length of the wedge member is short, when the input member presses the wedge member, the entire wedge member rotates and is formed on the outer peripheral surface of the bearing tube portion and the second member, and is concentric with the external gear. A new problem arises that it becomes difficult to enter the surface.

そこで本発明は、上記の課題を解決した自動車シートのリクライニング装置を提供することを目的とする。   Then, an object of this invention is to provide the reclining apparatus of the motor vehicle seat which solved said subject.

請求項１に係る発明は、シートクッションと該シートクッションに対して下端が回動自在に設けられたシートバックとのいずれか一方に結合されて内歯歯車を有する第１部材と、他方に結合されて前記内歯歯車よりも歯数が少ない外歯歯車を有する第２部材と、前記内歯歯車と前記外歯歯車とを噛み合わせることにより、前記第１部材に形成され前記内歯歯車と同心の軸受筒部の外周面と、前記第２部材に形成され前記外歯歯車と同心の内周面との間に形成される円形の偏心空間に配置された一対の楔部材と、該一対の楔部材を円周方向の相互に離反する方向へ付勢する付勢手段と、前記偏心空間に挿入され前記一対の楔部材の相互に対向する基端部とは反対側の先端部を円周方向に沿って押圧して回動させることにより、前記内歯歯車に対して前記外歯歯車が噛み合う噛合部を円周に沿って移動させ、前記第１部材に対して前記第２部材を前記噛合部の旋回方向とは反対方向へ減速して回転させる入力部材とを設け、前記楔部材の外周面に前記第２部材の内周面と点接触する外側接点を設ける一方、前記楔部材の内周面に前記軸受筒部の外周面と点接触する内側接点を設けた自動車シートのリクライニング装置において、前記一対の楔部材の夫々の前記先端部に形成され前記入力部材に押圧される被押圧面を、該被押圧面上であって前記入力部材が当接する第１当接点を通りかつ前記被押圧面と略直角な押圧方向線が、前記外側接点と前記内側接点との間に位置するように設定したことを特徴とする。   The invention according to claim 1 is coupled to a first member having an internal gear coupled to one of a seat cushion and a seat back having a lower end pivotably provided with respect to the seat cushion, and the other. The second member having an external gear having a smaller number of teeth than the internal gear, and the internal gear and the external gear meshing with each other, thereby forming the internal gear on the first member. A pair of wedge members disposed in a circular eccentric space formed between the outer peripheral surface of the concentric bearing tube portion and the outer peripheral gear and the concentric inner peripheral surface formed on the second member; An urging means for urging the wedge member in a direction away from each other in the circumferential direction, and a distal end portion of the pair of wedge members inserted in the eccentric space opposite to the mutually opposite proximal end portions. By pressing and rotating along the circumferential direction, And an input member that moves the meshing portion with which the external gear meshes along the circumference and decelerates and rotates the second member with respect to the first member in a direction opposite to the turning direction of the meshing portion. And providing an outer contact on the outer peripheral surface of the wedge member in point contact with the inner peripheral surface of the second member, and an inner contact on the inner peripheral surface of the wedge member on the outer peripheral surface of the bearing tube portion. In the reclining device for an automobile seat, the pressed surface that is formed at the tip of each of the pair of wedge members and is pressed by the input member is on the pressed surface and the input member abuts on the first surface. A pressing direction line that passes through the contact and is substantially perpendicular to the pressed surface is set to be positioned between the outer contact and the inner contact.

この発明によれば、入力部材が回転して該入力部材が一対の楔部材のいずれかの先端部を押圧したときに、該先端部の被押圧面上であって入力部材が当接する第１当接点には、該被押圧面と略直角な押圧方向線に沿って押圧力が作用する。この押圧力が楔部材の外側接点と内側接点との間に作用することから、楔部材が、偏心空間の間隔の狭い方から広い方へ容易に移動して抜ける。従って、偏心空間内での一対の楔部材の回転の開始が円滑に行われる。   According to this invention, when the input member rotates and the input member presses one of the tip portions of the pair of wedge members, the input member abuts on the pressed surface of the tip portion. A pressing force acts on the contact along a pressing direction line substantially perpendicular to the pressed surface. Since this pressing force acts between the outer contact and the inner contact of the wedge member, the wedge member easily moves from the narrower space of the eccentric space to the wider contact. Therefore, the rotation of the pair of wedge members in the eccentric space is smoothly started.

請求項２に係る発明は、請求項１に記載の自動車シートのリクライニング装置において、前記一対の楔部材の夫々の前記被押圧面を押圧する前記入力部材の夫々の押圧面上であって前記被押圧面に当接する第２当接点が、夫々の前記押圧面の半径方向外周側に設定されていることを特徴とする。   According to a second aspect of the present invention, in the reclining device for an automobile seat according to the first aspect, on the pressing surfaces of the input members that press the pressed surfaces of the pair of wedge members, The second contact point that contacts the pressing surface is set on the radially outer peripheral side of each of the pressing surfaces.

この発明によれば、押圧する部材である入力部材の押圧面と、押圧される部材である楔部材の夫々の先端部の被押圧面との当接点である第２当接点が、押圧面の外周側に配置されているので、加工誤差等により第２当接点が押圧面の外周側から内周側へ移動してしまったような場合であっても、必然的に押圧方向線は外側接点と内側接点との間に位置することになり、押圧力は確実に楔部材の外側接点と内側接点との間に作用し、楔部材は偏心空間の間隔が狭い方から広い方へ容易に移動して抜ける。   According to this invention, the second contact point that is the contact point between the pressing surface of the input member that is the member to be pressed and the pressed surface of each of the leading ends of the wedge members that are to be pressed is the pressing surface. Since the second contact point is moved from the outer peripheral side to the inner peripheral side of the pressing surface due to a processing error or the like, the pressing direction line is inevitably the outer contact point because it is arranged on the outer peripheral side. The pressing force acts between the outer contact and the inner contact of the wedge member, and the wedge member easily moves from the narrower space of the eccentric space to the wider contact. Then exit.

請求項１に係る自動車シートのリクライニング装置によれば、一対の楔部材の夫々の先端部に形成され入力部材に押圧される被押圧面を、該被押圧面上であって入力部材が当接する第１当接点を通りかつ被押圧面と略直角な押圧方向線が、外側接点と内側接点との間に位置するように設定したので、入力部材が回転して該入力部材が一対の楔部材のいずれかの先端部を押圧したときに、該先端部の被押圧面上であって入力部材が当接する第１当接点には、該被押圧面と略直角な押圧方向線に沿って押圧力が作用する。この押圧力が楔部材の外側接点と内側接点との間に作用することから、楔部材が、偏心空間の間隔の狭い方から広い方へ容易に移動して抜ける。従って、偏心空間内での一対の楔部材の回転の開始が円滑に行われる。   According to the reclining device for an automobile seat according to claim 1, the input member abuts the pressed surface that is formed at the distal end portion of each of the pair of wedge members and is pressed by the input member on the pressed surface. Since the pressing direction line passing through the first contact point and substantially perpendicular to the pressed surface is set between the outer contact and the inner contact, the input member rotates and the input member becomes a pair of wedge members. When the front end of any of the above is pressed, the first contact point on the pressed surface of the front end where the input member abuts is pressed along a pressing direction line substantially perpendicular to the pressed surface. Pressure acts. Since this pressing force acts between the outer contact and the inner contact of the wedge member, the wedge member easily moves from the narrower space of the eccentric space to the wider contact. Therefore, the rotation of the pair of wedge members in the eccentric space is smoothly started.

請求項２に係る自動車シートのリクライニング装置によれば、押圧する部材である入力部材の押圧面と、押圧される部材である楔部材の夫々の先端部の被押圧面との第２当接点が、押圧面の外周側に配置されているので、加工誤差等により第２当接点が押圧面の外周側から内周側へ移動してしまったような場合であっても、必然的に押圧方向線は外側接点と内側接点との間に位置することになり、押圧力は確実に楔部材の外側接点と内側接点との間に作用し、楔部材は偏心空間の間隔が狭い方から広い方へ容易に移動して抜ける。   According to the reclining device for an automobile seat according to claim 2, the second contact point between the pressing surface of the input member that is the member to be pressed and the pressed surface of each tip portion of the wedge member that is the member to be pressed is provided. Since the second contact point is moved from the outer peripheral side of the pressing surface to the inner peripheral side due to a processing error or the like, the pressing direction is inevitably required. The wire will be located between the outer contact and the inner contact, and the pressing force will surely act between the outer contact and the inner contact of the wedge member, and the wedge member will be wider from the one where the spacing of the eccentric space is narrower to the wider one. Easily move to and exit.

以下、本発明による自動車シートのリクライニング装置の実施の形態を説明する。リクライニング装置は、シートクッションに設けたブラケットと、シートバックに設けたブラケットとの間に介装された差動伝動機構によりシートクッションに対するシートバックの傾斜角度を調整するようになっている。   Hereinafter, an embodiment of a reclining device for an automobile seat according to the present invention will be described. The reclining device adjusts the inclination angle of the seat back with respect to the seat cushion by a differential transmission mechanism interposed between a bracket provided on the seat cushion and a bracket provided on the seat back.

リクライニング装置の構成図と分解斜視図とを図３，図４に示す。リクライニング装置は、シートクッションの図示しないブラケットに結合された第１歯車体（第１部材）１と、前記シートクッションに対して下端が回動自在に設けられたシートバックの図示しないブラケットに結合された第２歯車体（第２部材）２と、図示しないモータによって回転駆動される駆動ブッシュ（入力部材）３とを備えており、駆動ブッシュ３からいずれかの方向への回転運動が与えられると、第１歯車体１に対して第２歯車体２が駆動ブッシュ３の回転方向とは反対方向へ高い減速比で回転するようになっている。   A configuration diagram and an exploded perspective view of the reclining device are shown in FIGS. The reclining device is coupled to a first gear body (first member) 1 coupled to a bracket (not shown) of a seat cushion, and a bracket (not shown) of a seat back having a lower end pivotably provided with respect to the seat cushion. The second gear body (second member) 2 and a drive bush (input member) 3 that is rotationally driven by a motor (not shown) are provided, and when the drive bush 3 is given a rotational motion in any direction. The second gear body 2 rotates with respect to the first gear body 1 at a high reduction ratio in a direction opposite to the rotation direction of the drive bush 3.

図３（ｂ）に示すように、第１歯車体１における第２歯車体２との対向面には円形の凹部１ａが形成されており、該凹部１ａの内周面には内歯１ｂが形成され、内歯歯車１ｃを構成している。一方、図４のように、第２歯車体２における第１歯車体１との対向面には、円形の凹部２ａが形成されており、該凹部２ａの内部には外歯２ｂを有する外歯歯車２ｃが嵌合されている。即ち、凹部２ａの内周面には円周方向へ間欠的に内歯２ｄが形成されており、該内歯２ｄに外歯歯車２ｃの一部を嵌合することにより、第２歯車体２と外歯歯車２ｃとが一体化されている。図３（ｂ）に示すように、外歯歯車２ｃは、その軸方向での右側が内歯２ｄと噛み合った状態で嵌合され、左側が内歯歯車１ｃと噛み合うように設定されている。   As shown in FIG. 3B, a circular recess 1a is formed on the surface of the first gear body 1 facing the second gear body 2, and the inner teeth 1b are formed on the inner peripheral surface of the recess 1a. The internal gear 1c is formed. On the other hand, as shown in FIG. 4, a circular recess 2a is formed on the surface of the second gear body 2 facing the first gear body 1, and an external tooth having external teeth 2b inside the recess 2a. The gear 2c is fitted. That is, internal teeth 2d are intermittently formed in the circumferential direction on the inner peripheral surface of the recess 2a. By fitting a part of the external gear 2c to the internal teeth 2d, the second gear body 2 And the external gear 2c are integrated. As shown in FIG. 3B, the external gear 2c is set so that the right side in the axial direction is engaged with the internal tooth 2d and the left side is engaged with the internal gear 1c.

図５に示すように、内歯歯車１ｃにおける内歯１ｂの数が例えば３４であるのに対し、外歯歯車２ｃにおける外歯２ｂの数は３３となって、外歯２ｂの数が内歯１ｂの数よりもひとつだけ少なくなっている。そして、外歯２ｂの数が少ないために、内歯１ｂの中心Ｂと外歯２ｂの中心Ａとは偏心している。   As shown in FIG. 5, the number of internal teeth 1b in the internal gear 1c is 34, for example, whereas the number of external teeth 2b in the external gear 2c is 33, and the number of external teeth 2b is internal teeth. It is one less than the number 1b. And since there are few external teeth 2b, the center B of the internal tooth 1b and the center A of the external tooth 2b are eccentric.

図５に示すように、前記内歯歯車１ｃに対して前記外歯歯車２ｃが噛み合う噛合部Ｈを円周に沿って移動させるための機構が設けられている。前記第１歯車体１には、前記内歯歯車１ｃと同心の軸受筒部１ｄが形成される一方、前記外歯歯車２ｃには外歯歯車２ｃと同心の内周面２ｅが形成され、軸受筒部１ｄの外周面１ｅと外歯歯車２ｃの内周面２ｅとの間に円形の偏心空間４が形成されている。そして、偏心空間４に一対の楔（楔部材）５が配置されており、一対の楔５が偏心空間４内を円周方向に沿って移動することにより、外歯歯車２ｃの中心Ａが軸受筒部１ｄの中心Ｂを中心として円運動を描き、円周方向において外歯歯車２ｃの一対の楔５と対応する部分が前記内歯歯車１ｃへ押圧されて噛み合いが生じることから、この噛み合いが隣の歯に移行していく。つまり、一対の楔５が位置する側に噛合部Ｈができ、この噛合部Ｈが円に沿って移動することになる。   As shown in FIG. 5, there is provided a mechanism for moving a meshing portion H with which the external gear 2c meshes with the internal gear 1c along the circumference. The first gear body 1 is formed with a bearing tube portion 1d concentric with the internal gear 1c, while the external gear 2c is formed with an inner peripheral surface 2e concentric with the external gear 2c. A circular eccentric space 4 is formed between the outer peripheral surface 1e of the cylindrical portion 1d and the inner peripheral surface 2e of the external gear 2c. A pair of wedges (wedge members) 5 are disposed in the eccentric space 4, and the pair of wedges 5 move in the eccentric space 4 along the circumferential direction, whereby the center A of the external gear 2c is a bearing. Since the circular motion is drawn around the center B of the cylindrical portion 1d and the portions corresponding to the pair of wedges 5 of the external gear 2c are pressed against the internal gear 1c in the circumferential direction, the meshing occurs. Move to the next tooth. That is, the meshing portion H is formed on the side where the pair of wedges 5 are located, and the meshing portion H moves along a circle.

なお、内歯歯車１ｃの中心Ｂと外歯歯車２ｃの中心Ａとを結ぶ直線Ｌの上に位置する楔５側の外歯２ｂが対応する内歯１ｂに最も深く入り込んでいるが、実際に内歯１ｂと外歯２ｂとが噛み合う（当接している）歯は、直線Ｌ上の外歯２ｂから数えて左右夫々５番目の外歯２ｂとなる。   The external teeth 2b on the wedge 5 side located on the straight line L connecting the center B of the internal gear 1c and the center A of the external gear 2c penetrates the corresponding internal tooth 1b most deeply. The teeth with which the inner teeth 1b and the outer teeth 2b mesh (contact) are the fifth outer teeth 2b on the left and right sides as counted from the outer teeth 2b on the straight line L.

楔５を単一の部材で構成すると寸法のバラツキがあったときに噛合部Ｈでのバックラッシュが大きくなったり小さくなったりするので、常にバックラッシュのない状態を維持するために、一対の楔５を設け、該一対の楔５を円周方向の相互に離反する方向へ付勢するばね（付勢手段）６が設けられている。図１に示すように、楔５の全体形状は、その平面図が略円弧形状であり、円弧角θは９０度以上の例えばθ=１０４度になっており、板厚は外歯歯車２ｃの板厚とほぼ同じ値である。そして、図１において、楔５の幅寸法はいずれも相互に対向する基端部が最も大きくなっており、該基端部には、ばね６の端部を係合させるための切欠部５ａが形成されている。   If the wedge 5 is composed of a single member, the backlash at the meshing portion H increases or decreases when there is a variation in dimensions. Therefore, in order to maintain a state free of backlash at all times, 5 and a spring (biasing means) 6 that urges the pair of wedges 5 in the circumferential direction away from each other. As shown in FIG. 1, the overall shape of the wedge 5 is a substantially arc shape in plan view, the arc angle θ is 90 degrees or more, for example, θ = 104 degrees, and the plate thickness is that of the external gear 2c. It is almost the same value as the plate thickness. In FIG. 1, the widths of the wedges 5 are the largest at the base end portions facing each other, and the base end portions have notches 5 a for engaging the end portions of the springs 6. Is formed.

図５に示すように、一対の楔５は、基端部どうしを突合わせた状態で偏心空間４に嵌め込まれ、ばね６の両端が夫々の楔５の切欠部５ａと係合している。つまり、一対の楔５はばね６の付勢力により円周方向での相互に反対方向へ向かって付勢されており、このため楔効果により、偏心空間４を広げる方向、即ち外歯歯車２ｃを図の上方へ押し上げて内歯歯車１ｃとの噛み合いを深くしてバックラッシュのない状態を作り、軸受筒部１ｄと内歯歯車１ｃとの間で、一対の楔５と外歯歯車２ｃとが遊びを生じることのない隙間のない状態を維持している。   As shown in FIG. 5, the pair of wedges 5 are fitted into the eccentric space 4 in a state where the base ends are abutted with each other, and both ends of the spring 6 are engaged with the notches 5 a of the respective wedges 5. In other words, the pair of wedges 5 are urged in opposite directions in the circumferential direction by the urging force of the spring 6. For this reason, the direction of expanding the eccentric space 4, that is, the external gear 2 c is caused by the wedge effect. Pushing upward in the drawing to deepen the meshing with the internal gear 1c to create a state without backlash, and the pair of wedges 5 and the external gear 2c are between the bearing tube portion 1d and the internal gear 1c. Maintains a gap-free state that does not cause play.

以上のように配置された一対の楔５を、偏心空間４の内部で円周方向に沿って押圧して移動させるため、前記駆動ブッシュ３が設けられている。駆動ブッシュ３は一方の楔５の幅が狭い方の先端部を円周方向に沿って押圧し、一方の楔５を旋回させる。ここで、駆動ブッシュ３により一対の楔５を円周方向へ１回転させると、前記内歯歯車１ｃに対して前記外歯歯車２ｃは歯数差の１歯の分だけ噛み合い位置がずれ、これにより第１歯車体１に対して第２歯車体２を前記駆動ブッシュ３の旋回方向とは反対方向へ高い減速比で減速して相対的に回転する。   The drive bush 3 is provided to press and move the pair of wedges 5 arranged as described above along the circumferential direction inside the eccentric space 4. The drive bush 3 presses the tip of the narrower one of the wedges 5 along the circumferential direction to turn the one wedge 5. Here, when the pair of wedges 5 are rotated once in the circumferential direction by the drive bush 3, the meshing position of the external gear 2c is shifted by one tooth corresponding to the difference in the number of teeth with respect to the internal gear 1c. Thus, the second gear body 2 is decelerated at a high reduction ratio in the direction opposite to the turning direction of the drive bush 3 with respect to the first gear body 1 and is rotated relatively.

駆動ブッシュ３の形状を図４に基づいて説明する。駆動ブッシュ３は、第１歯車体１の軸心位置に形成された前記軸受筒部１ｄの内部に挿入される筒部３ａと、該筒部３ａと一体に形成され、一対の楔５が軸方向へ移動して抜け落ちないように規制するフランジ部３ｂと、該フランジ部３ｂから軸方向に沿って突出する一対の押圧部３ｃとで構成されている。筒部３ａの内部には、モータに連結された図示しない入力軸を挿入して回転力を伝達できるようにするために、軸方向溝３ｄが円周方向に沿って複数形成されている。筒部３ａを軸受筒部１ｄの内部に挿入することにより、一対の押圧部３ｃが軸方向から偏心空間４に挿入されており、夫々の押圧部３ｃは図５に斜線で示すように、一対の楔５の先端部近傍に位置している。   The shape of the drive bush 3 will be described with reference to FIG. The drive bush 3 is formed integrally with the cylindrical portion 3a inserted into the bearing cylindrical portion 1d formed at the axial center position of the first gear body 1 and the cylindrical portion 3a. It consists of a flange portion 3b that moves in the direction and restricts it from falling out, and a pair of pressing portions 3c that protrude from the flange portion 3b along the axial direction. A plurality of axial grooves 3d are formed in the cylindrical portion 3a along the circumferential direction so that an input shaft (not shown) connected to the motor can be inserted to transmit the rotational force. By inserting the cylindrical portion 3a into the bearing cylindrical portion 1d, a pair of pressing portions 3c is inserted into the eccentric space 4 from the axial direction, and each pressing portion 3c has a pair of diagonal portions as shown by hatching in FIG. It is located in the vicinity of the tip of the wedge 5.

図３，図４に示すように、前記各部材を組み付けて、第１歯車体１と第２歯車体２とが分離しないように軸方向に規制する連結環７が設けられている。この連結環７は、図３（ｂ）における側面部７ａの部分は組み付け前は筒形状であり、第１歯車体１と第２歯車体２とを組み付けたのちに絞り込んで側面部７ａに形成したものである。   As shown in FIGS. 3 and 4, a connecting ring 7 is provided that restricts the members in the axial direction so that the first gear body 1 and the second gear body 2 are not separated by assembling the members. The connecting ring 7 is formed in the side surface portion 7a after the first gear body 1 and the second gear body 2 are assembled after the portion of the side surface portion 7a in FIG. It is a thing.

以上がリクライニング装置の全体構成であるが、次に本発明の要部を説明する。図１に示すように、楔５の長さを円周方向の角度θで現すと、前記のようにθ＝１０４度に設定されている。そして、楔５の外周面５ｂは、外歯歯車２ｃの内周面２ｅと１点で接触するように、該内周面２ｅの半径寸法よりも小さい単一の円弧で形成されている。一方、楔５の内周面５ｃは、軸受筒部１ｄの外周面１ｅと１点で接触するように、該外周面１ｅの半径寸法よりも大きい２つの円弧で形成され、該２つの円弧のつなぎ目の部分が該外周面１ｅと接触する。これにより、楔５の外周面５ｂは外歯歯車２ｃの内周面２ｅに外側接点５ｄで点接触し、内周面５ｃは軸受筒部１ｄの外周面１ｅと内側接点５ｅで点接触する。   The above is the overall configuration of the reclining device. Next, the main part of the present invention will be described. As shown in FIG. 1, when the length of the wedge 5 is expressed by the circumferential angle θ, θ = 104 degrees is set as described above. The outer peripheral surface 5b of the wedge 5 is formed by a single arc smaller than the radial dimension of the inner peripheral surface 2e so as to come into contact with the inner peripheral surface 2e of the external gear 2c at one point. On the other hand, the inner peripheral surface 5c of the wedge 5 is formed by two arcs larger than the radial dimension of the outer peripheral surface 1e so as to come into contact with the outer peripheral surface 1e of the bearing tube portion 1d at one point. The joint portion is in contact with the outer peripheral surface 1e. As a result, the outer peripheral surface 5b of the wedge 5 makes point contact with the inner peripheral surface 2e of the external gear 2c through the outer contact 5d, and the inner peripheral surface 5c makes point contact with the outer peripheral surface 1e of the bearing tube portion 1d through the inner contact 5e.

次に、楔５の先端部と駆動ブッシュ３の押圧部３ｃとの当接部の構成について説明する。本願の構成と従来の構成とを比較するため、従来の構成を図２に示す。従来は押圧部３ｃの押圧面３ｅおよび楔５の被押圧面５ｆはいずれも第１歯車体１における軸受筒部１ｄの略中心を通る半径方向の直線と略平行に形成されており、このような場合には押圧部３ｃから被押圧面５ｆへ加わる押圧力Ｆの押圧方向線８は外側接点５ｄの外側に位置するので、押圧力Ｆが作用しても、楔５は偏心空間４の間隔が狭い方から広い方へ移動しにくく、楔５が抜けにくい。   Next, the configuration of the contact portion between the tip of the wedge 5 and the pressing portion 3c of the drive bush 3 will be described. In order to compare the configuration of the present application with the conventional configuration, the conventional configuration is shown in FIG. Conventionally, both the pressing surface 3e of the pressing portion 3c and the pressed surface 5f of the wedge 5 are formed substantially in parallel with a straight line in the radial direction passing through the approximate center of the bearing tube portion 1d in the first gear body 1, as described above. In this case, the pressing direction line 8 of the pressing force F applied from the pressing portion 3c to the pressed surface 5f is located outside the outer contact point 5d, so that the wedge 5 is spaced from the eccentric space 4 even when the pressing force F acts. Is difficult to move from the narrower side to the wider side, and the wedge 5 is difficult to come off.

このため、本発明では以下のように構成されている。図１のように、駆動ブッシュ３の押圧部３ｃによって押圧される一対の楔５の夫々の先端部の被押圧面５ｆ上であって、前記押圧部３ｃが当接する当接点を第１当接点５ｇとすると、押圧部３ｃから楔５へ加わる押圧力Ｆは、第１当接点５ｇを通りかつ被押圧面５ｆと略直角に引いた押圧方向線８上に位置する。本発明では、この押圧方向線８が前記外側接点５ｄと前記内側接点５ｅとの間に位置するように、楔５の先端部の被押圧面５ｆの角度が設定されている。このように構成したのは、外側接点５ｄと内側接点５ｅとの間へ向かって被押圧面５ｆから楔５を押圧すると、楔５が偏心空間４の間隔が狭い方から広い方へ抜け易いからである。   For this reason, the present invention is configured as follows. As shown in FIG. 1, a contact point on the pressed surface 5f of each tip of the pair of wedges 5 pressed by the pressing portion 3c of the drive bush 3 is a first contact point. Assuming 5 g, the pressing force F applied to the wedge 5 from the pressing portion 3 c is located on the pressing direction line 8 that passes through the first contact point 5 g and is drawn substantially perpendicular to the pressed surface 5 f. In the present invention, the angle of the pressed surface 5f at the tip of the wedge 5 is set so that the pressing direction line 8 is located between the outer contact 5d and the inner contact 5e. The reason for this configuration is that when the wedge 5 is pressed from the pressed surface 5f toward the space between the outer contact 5d and the inner contact 5e, the wedge 5 is likely to come out from the narrower space to the wider space. It is.

また、加工の際に多少の誤差が生じても、確実に押圧方向線８が前記外側接点５ｄと前記内側接点５ｅとの間に位置するように構成されている。即ち、一対の楔５の夫々の被押圧面５ｆを押圧する押圧部３ｃの夫々の押圧面３ｅ上であって被押圧面５ｆに当接する第２当接点３ｆが、夫々の押圧面３ｅの半径方向外周側に設定されている。このように押圧面３ｅの半径方向外周側に第２当接点３ｆが設定されていれば、加工誤差等によって第２当接点３ｆが半径方向内周側へ移動しても、第１当接点５ｇ，押圧方向線８が半径方向内周側へ移動し、押圧方向線８は必ず前記外側接点５ｄと前記内側接点５ｅとの間に位置するからである。   Further, even if some error occurs during processing, the pressing direction line 8 is configured to be surely positioned between the outer contact 5d and the inner contact 5e. That is, the second contact point 3f on each pressing surface 3e of the pressing portion 3c that presses each pressed surface 5f of the pair of wedges 5 and that contacts the pressed surface 5f is a radius of each pressing surface 3e. It is set on the outer circumferential side. In this way, if the second contact point 3f is set on the radially outer peripheral side of the pressing surface 3e, the first contact point 5g even if the second contact point 3f moves to the radially inner peripheral side due to a processing error or the like. This is because the pressing direction line 8 moves to the radially inner peripheral side, and the pressing direction line 8 is always located between the outer contact point 5d and the inner contact point 5e.

次に、自動車シートのリクライニング装置の作用を説明する。図示しない入力軸の回転により駆動ブッシュ３がいずれかの方向へ回転すると、一対の押圧部３ｃのいずれかが、一対の楔５の一方を先端部側から基端部側へ押圧する。このとき、ばね６が少し圧縮され、圧縮された分だけ他方の楔５が同じ方向へ少し旋回するということを繰り返しながら、一対の楔５の相互間の隙間を生じることなく一対の楔５が偏心空間４の内部で円周に沿って旋回する。これにより、円周方向における一対の楔５と対応する部分で外歯歯車２ｃが内歯歯車１ｃに噛み合い、噛み合う部分である噛合部Ｈが円周方向に沿って移動する。噛合部Ｈが一回りすると、外歯歯車２ｃの歯数が１枚少ないことから、外歯歯車２ｃが、一対の楔５および噛合部Ｈの旋回方向とは反対側へ歯１枚分だけ回転する。つまり、駆動ブッシュ３を回転させると、シートクッションに固定された第１歯車体１に対し、第２歯車体２がシートバックと共に大きな減速比で減速され、駆動ブッシュ３の回転する方向とは反対方向へ回動することになる。   Next, the operation of the reclining device for an automobile seat will be described. When the drive bush 3 rotates in any direction due to the rotation of the input shaft (not shown), one of the pair of pressing portions 3c presses one of the pair of wedges 5 from the distal end side to the proximal end side. At this time, while the spring 6 is slightly compressed and the other wedge 5 is slightly rotated in the same direction by the amount of compression, the pair of wedges 5 is formed without generating a gap between the pair of wedges 5. It turns along the circumference inside the eccentric space 4. Thereby, the external gear 2c meshes with the internal gear 1c at a portion corresponding to the pair of wedges 5 in the circumferential direction, and the meshing portion H that is a meshed portion moves along the circumferential direction. When the meshing portion H makes one turn, the number of teeth of the external gear 2c is reduced by one, so that the external gear 2c rotates by one tooth to the side opposite to the turning direction of the pair of wedges 5 and the meshing portion H. To do. That is, when the drive bush 3 is rotated, the second gear body 2 is decelerated at a large reduction ratio together with the seat back with respect to the first gear body 1 fixed to the seat cushion, and is opposite to the direction in which the drive bush 3 rotates. Will rotate in the direction.

この発明によれば、駆動ブッシュ３が回転して押圧部３ｃが一対の楔５のいずれかの先端部を押圧したときに、該先端部の被押圧面５ｆ上であって押圧部３ｃが当接する第１当接点５ｇには、該被押圧面５ｆと略直角な押圧方向線８に沿って押圧力Ｆが作用する。この押圧力Ｆが楔５の外側接点５ｄと内側接点５ｅとの間に作用することから、楔５が、偏心空間４の間隔が狭い方から広い方へ容易に移動して抜ける。従って、偏心空間４内での一対の楔５の回転の開始が円滑に行われる。   According to the present invention, when the driving bush 3 rotates and the pressing portion 3c presses one of the tip portions of the pair of wedges 5, the pressing portion 3c is on the pressed surface 5f of the tip portion. A pressing force F acts on the first contact point 5g in contact with the first contact point 5g along a pressing direction line 8 substantially perpendicular to the pressed surface 5f. Since this pressing force F acts between the outer contact 5d and the inner contact 5e of the wedge 5, the wedge 5 is easily moved from the narrower space to the wider space. Therefore, the rotation of the pair of wedges 5 in the eccentric space 4 is smoothly started.

また、この発明によれば、押圧する部材である押圧部３ｃの押圧面３ｅと、押圧される部材である楔５の夫々の先端部の被押圧面５ｆとの当接点である第２当接点３ｆが、押圧面３ｅの外周側に配置されているので、加工誤差等により第２当接点３ｆが押圧面３ｅの外周側から内周側へ移動してしまったような場合であっても、必然的に押圧方向線８は外側接点５ｄと内側接点５ｅとの間に位置することになり、押圧力Ｆは確実に楔５の外側接点５ｄと内側接点５ｅとの間に作用し、楔５は偏心空間４の間隔が狭い方から広い方へ容易に移動して抜ける。   Further, according to the present invention, the second contact point that is a contact point between the pressing surface 3e of the pressing portion 3c that is a member to be pressed and the pressed surface 5f of each tip portion of the wedge 5 that is a member to be pressed. Since 3f is arranged on the outer peripheral side of the pressing surface 3e, even if the second contact point 3f has moved from the outer peripheral side to the inner peripheral side of the pressing surface 3e due to a processing error or the like, Inevitably, the pressing direction line 8 is located between the outer contact 5d and the inner contact 5e, and the pressing force F acts between the outer contact 5d and the inner contact 5e of the wedge 5 reliably. Can easily move from the narrower space 4 to the wider space.

なお、本実施の形態は、シートクッションに第１歯車体を結合し、シートバックに第２歯車体を結合したが、シートクッションに第２歯車体を結合し、シートバックに第１歯車体を結合してもよい。   In the present embodiment, the first gear body is coupled to the seat cushion, and the second gear body is coupled to the seat back. However, the second gear body is coupled to the seat cushion, and the first gear body is coupled to the seat back. May be combined.

一対の楔と押圧部との関係を示す平面図（実施の形態）。The top view which shows the relationship between a pair of wedge and a press part (embodiment). 一対の楔と押圧部との関係を示す平面図（従来）。The top view which shows the relationship between a pair of wedge and a press part (conventional). 自動車シートのリクライニング装置に係り、（ａ）は正面図、（ｂ）は（ａ）のＡ−Ａ矢視図（実施の形態）。It is related with the reclining apparatus of a motor vehicle seat, (a) is a front view, (b) is the AA arrow directional view (embodiment) of (a). 自動車シートのリクライニング装置の分解斜視図（実施の形態）。The exploded perspective view of the reclining device of a car seat (embodiment). 自動車シートのリクライニング装置から第２歯車体２を外して示す説明図（実施の形態）。Explanatory drawing which removes and shows the 2nd gear body 2 from the reclining apparatus of a motor vehicle seat (embodiment).

符号の説明Explanation of symbols

１…第１歯車体（第１部材）
１ｃ…内歯歯車
１ｄ…軸受筒部
１ｅ…軸受筒部の外周面
２…第２歯車体（第２部材）
２ｃ…外歯歯車
２ｅ…第２歯車体の内周面
３…駆動ブッシュ（入力部材）
３ｃ…押圧部
３ｅ…押圧面
３ｆ…第２当接点
４…偏心空間
５…楔（楔部材）
５ｂ…楔の外周面
５ｃ…楔の内周面
５ｄ…外側接点
５ｅ…内側接点
５ｆ…被押圧面
５ｇ…第１当接点
６…ばね（付勢手段）
８…押圧方向線
Ｈ…噛合部 1 ... 1st gear body (1st member)
DESCRIPTION OF SYMBOLS 1c ... Internal gear 1d ... Bearing cylinder part 1e ... Outer peripheral surface of a bearing cylinder part 2 ... 2nd gear body (2nd member)
2c ... External gear 2e ... Inner peripheral surface of second gear body 3 ... Drive bush (input member)
3c ... Pressing part 3e ... Pressing surface 3f ... Second contact point 4 ... Eccentric space 5 ... Wedge (wedge member)
5b ... Outer peripheral surface of wedge 5c ... Inner peripheral surface of wedge 5d ... Outer contact 5e ... Inner contact 5f ... Pressed surface 5g ... First contact point 6 ... Spring (biasing means)
8 ... Pressing direction line H ... Mating part

Claims (2)

シートクッションと該シートクッションに対して下端が回動自在に設けられたシートバックとのいずれか一方に結合されて内歯歯車を有する第１部材と、他方に結合されて前記内歯歯車よりも歯数が少ない外歯歯車を有する第２部材と、前記内歯歯車と前記外歯歯車とを噛み合わせることにより、前記第１部材に形成され前記内歯歯車と同心の軸受筒部の外周面と、前記第２部材に形成され前記外歯歯車と同心の内周面との間に形成される円形の偏心空間に配置された一対の楔部材と、該一対の楔部材を円周方向の相互に離反する方向へ付勢する付勢手段と、前記偏心空間に挿入され前記一対の楔部材の相互に対向する基端部とは反対側の先端部を円周方向に沿って押圧して回動させることにより、前記内歯歯車に対して前記外歯歯車が噛み合う噛合部を円周に沿って移動させ、前記第１部材に対して前記第２部材を前記噛合部の旋回方向とは反対方向へ減速して回転させる入力部材とを設け、
前記楔部材の外周面に前記第２部材の内周面と点接触する外側接点を設ける一方、前記楔部材の内周面に前記軸受筒部の外周面と点接触する内側接点を設けた自動車シートのリクライニング装置において、
前記一対の楔部材の夫々の前記先端部に形成され前記入力部材に押圧される被押圧面を、該被押圧面上であって前記入力部材が当接する第１当接点を通りかつ前記被押圧面と略直角な押圧方向線が、前記外側接点と前記内側接点との間に位置するように設定したことを特徴とする自動車シートのリクライニング装置。 A first member coupled to one of a seat cushion and a seat back having a lower end pivotably provided with respect to the seat cushion and having an internal gear, and coupled to the other than the internal gear An outer peripheral surface of a bearing cylinder portion formed on the first member and concentric with the internal gear by meshing the second gear having an external gear with a small number of teeth with the internal gear and the external gear. A pair of wedge members disposed in a circular eccentric space formed between the external gear and the inner peripheral surface concentric with the external gear, and the pair of wedge members in the circumferential direction A biasing means for biasing in a direction away from each other; and a distal end portion of the pair of wedge members inserted in the eccentric space opposite to the mutually opposite base end portions is pressed along the circumferential direction. By rotating, the external gear meshes with the internal gear. Cormorant an engagement portion is moved along the circumference, and an input member which rotates at a reduced speed in the opposite direction is provided to the turning direction of said engagement portion of said second member relative to the first member,
An automobile in which an outer contact that makes point contact with the inner peripheral surface of the second member is provided on the outer peripheral surface of the wedge member, while an inner contact that makes point contact with the outer peripheral surface of the bearing tube portion is provided on the inner peripheral surface of the wedge member. In the seat reclining device,
The pressed surface that is formed at the tip of each of the pair of wedge members and is pressed by the input member passes through the first contact point on the pressed surface and the input member contacts, and the pressed surface A reclining device for an automobile seat, wherein a pressing direction line substantially perpendicular to the surface is set between the outer contact and the inner contact. 請求項１に記載の自動車シートのリクライニング装置において、
前記一対の楔部材の夫々の前記被押圧面を押圧する前記入力部材の夫々の押圧面上であって前記被押圧面に当接する第２当接点が、夫々の前記押圧面の半径方向外周側に設定されていることを特徴とする自動車シートのリクライニング装置。 The reclining device for an automobile seat according to claim 1,
A second contact point on each pressing surface of the input member that presses the pressed surface of each of the pair of wedge members and in contact with the pressed surface is a radially outer peripheral side of each of the pressing surfaces. A reclining device for an automobile seat, characterized in that
JP2007043102A 2007-02-23 2007-02-23 Reclining device of automobile seat Pending JP2008200442A (en)

Priority Applications (1)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101107985B1 (en) * 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107984B1 (en) 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107986B1 (en) 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107987B1 (en) * 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
EP2514631A2 (en) 2011-04-22 2012-10-24 Aisin Seiki Kabushiki Kaisha Seat reclining apparatus
JP2018019830A (en) * 2016-08-02 2018-02-08 トヨタ紡織株式会社 Recliner
EP3381743A1 (en) 2017-03-29 2018-10-03 TF-Metal Co., Ltd. Seat reclining device
WO2024017140A1 (en) * 2022-07-21 2024-01-25 恺博座椅机械部件有限公司 Continuous seat wedge eccentric structure angle adjuster

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101107985B1 (en) * 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107984B1 (en) 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107986B1 (en) 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
KR101107987B1 (en) * 2010-03-10 2012-01-25 현대다이모스(주) A reclinning devece for seats for vehicles
EP2514631A2 (en) 2011-04-22 2012-10-24 Aisin Seiki Kabushiki Kaisha Seat reclining apparatus
US8950811B2 (en) 2011-04-22 2015-02-10 Aisin Seiki Kabushiki Kaisha Seat reclining apparatus
JP2018019830A (en) * 2016-08-02 2018-02-08 トヨタ紡織株式会社 Recliner
EP3381743A1 (en) 2017-03-29 2018-10-03 TF-Metal Co., Ltd. Seat reclining device
CN108685369A (en) * 2017-03-29 2018-10-23 Tf金属株式会社 Seat backward tilting device
WO2024017140A1 (en) * 2022-07-21 2024-01-25 恺博座椅机械部件有限公司 Continuous seat wedge eccentric structure angle adjuster

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