JP6585993B2 - Seat reclining device and manufacturing method thereof - Google Patents

Seat reclining device and manufacturing method thereof Download PDF

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JP6585993B2
JP6585993B2 JP2015209721A JP2015209721A JP6585993B2 JP 6585993 B2 JP6585993 B2 JP 6585993B2 JP 2015209721 A JP2015209721 A JP 2015209721A JP 2015209721 A JP2015209721 A JP 2015209721A JP 6585993 B2 JP6585993 B2 JP 6585993B2
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peripheral surface
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bracket
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訓久 大石
訓久 大石
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株式会社Ｔｆ−Ｍｅｔａｌ
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Description

本発明は、シートリクライニング装置及びその製造方法に関する。   The present invention relates to a seat reclining device and a manufacturing method thereof.

従来から、無段階調節式のシートリクライニング装置が公知である（例えば、特許文献１参照）。   2. Description of the Related Art Conventionally, a stepless adjustable seat reclining device is known (see, for example, Patent Document 1).

この特許文献１に記載のシートリクライニング装置は、内歯歯車を有する第一部材と、歯数が内歯歯車よりも少ない外歯歯車を有する第二部材と、内歯歯車と外歯歯車とを噛み合わせることにより第一部材と第二部材との間に形成された偏心空間に配置される一対の楔部材と、一対の楔部材を互いに離間するように付勢する付勢部材と、偏心空間に配置され一対の楔部材を円周方向に押して回動させる駆動部材と、を備える。第一部材は、シートクッション及びシートバックの一方にブラケットを介して連結され、第二部材は、他方に別のブラケットを介して連結される。   The seat reclining device described in Patent Document 1 includes a first member having an internal gear, a second member having an external gear having fewer teeth than the internal gear, an internal gear, and an external gear. A pair of wedge members disposed in an eccentric space formed between the first member and the second member by meshing, a biasing member that biases the pair of wedge members away from each other, and an eccentric space And a driving member that pushes and rotates the pair of wedge members in the circumferential direction. The first member is connected to one of the seat cushion and the seat back via a bracket, and the second member is connected to the other via another bracket.

このシートリクライニング装置では、第一部材と第二部材の外周を連結環により保持することで、シートリクライニング装置をユニット化している。また、一対の楔部材、付勢部材及び駆動部材の脱落を防止する蓋部材を、内歯歯車を有する第一部材の外側面に設けている。   In this seat reclining device, the seat reclining device is unitized by holding the outer periphery of the first member and the second member with a connecting ring. Further, a lid member that prevents the pair of wedge members, the urging member, and the driving member from falling off is provided on the outer surface of the first member having the internal gear.

特開２０１０−２５３１０１号公報JP 2010-253101 A

前記特許文献１に記載のシートリクライニング装置では、ブラケットを蓋部材の外側面に重ねて配置している。このため、二つのブラケットの間隔（オフセット量）が大きくなり、ブラケットに倒れが生じてシートリクライニング装置にこじりが生じ、シートリクライニング装置の強度が低下するおそれがあるという問題がある。   In the seat reclining device described in Patent Document 1, the bracket is disposed so as to overlap the outer surface of the lid member. For this reason, there is a problem that the distance between the two brackets (offset amount) becomes large, the bracket falls down, the seat reclining device is twisted, and the strength of the seat reclining device may be reduced.

そこで、本発明は、シートバックに設けられるブラケットとシートクッションに設けられるブラケットとの間隔を小さくすることを目的とする。   Therefore, an object of the present invention is to reduce the distance between a bracket provided on a seat back and a bracket provided on a seat cushion.

本発明に係るシートリクライニング装置は、内歯歯車を有するとともに、該内歯歯車と同心の第一軸受筒を有する第一部材と、歯数が前記内歯歯車よりも少ない外歯歯車を有するとともに、該外歯歯車と同心の第二軸受筒を有する第二部材と、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一軸受筒と前記第二軸受筒との間に形成された偏心空間に配置される一対の楔部材と、前記一対の楔部材を互いに離間するように付勢するリング状の付勢部材と、前記一対の楔部材を円周方向に押して回動させる駆動部材と、前記付勢部材及び前記駆動部材の側面を覆う蓋部材と、前記第一部材及び前記第二部材の外周を覆って軸方向への相対移動を規制する連結環と、を備える。前記第一部材は、外側面に円周方向に間隔をおいて複数形成された円弧状突起を有する。前記蓋部材は、前記円弧状突起の内周面に嵌合される第一フランジと、円周方向に隣り合う前記円弧状突起の間に嵌合される第二フランジと、を有する。前記第二フランジは、その端部から半径方向外側へ延びるつば部を有し、シートのフレームに固定されるブラケットが、前記円弧状突起の外周面が嵌合する円形孔を有している。前記円弧状突起の外周面と前記第二フランジの前記つば部の外周面とが前記円形孔の内周面に嵌合されており、この嵌合面に沿って、前記第一部材及び前記蓋部材と前記ブラケットとを結合する結合部が形成されている。   The seat reclining device according to the present invention has an internal gear, a first member having a first bearing cylinder concentric with the internal gear, and an external gear having a smaller number of teeth than the internal gear. The second member having a second bearing cylinder concentric with the external gear, and the internal gear and the external gear are meshed to form between the first bearing cylinder and the second bearing cylinder. A pair of wedge members disposed in the eccentric space, a ring-shaped urging member that urges the pair of wedge members so as to be separated from each other, and the pair of wedge members are pushed in the circumferential direction to rotate. A driving member; a lid member that covers side surfaces of the biasing member and the driving member; and a connecting ring that covers outer peripheries of the first member and the second member and restricts relative movement in the axial direction. The first member has a plurality of arc-shaped protrusions formed on the outer surface at intervals in the circumferential direction. The lid member includes a first flange fitted to an inner peripheral surface of the arc-shaped protrusion and a second flange fitted between the arc-shaped protrusions adjacent in the circumferential direction. The second flange has a flange portion extending radially outward from an end portion thereof, and a bracket fixed to the frame of the seat has a circular hole into which an outer peripheral surface of the arc-shaped protrusion is fitted. An outer peripheral surface of the arc-shaped protrusion and an outer peripheral surface of the collar portion of the second flange are fitted to an inner peripheral surface of the circular hole, and the first member and the lid are fitted along the fitting surface. A coupling portion for coupling the member and the bracket is formed.

本発明に係るシートリクライニング装置では、第一部材の外側面とブラケットの内側面との間に蓋部材が存在しないため、シートバックに設けられるブラケットとシートクッションに設けられるブラケットとの間隔（オフセット量）を小さくすることが可能になる。   In the seat reclining device according to the present invention, since there is no cover member between the outer surface of the first member and the inner surface of the bracket, the distance (offset amount) between the bracket provided on the seat back and the bracket provided on the seat cushion. ) Can be reduced.

本発明の実施形態に係るシートリクライニング装置の斜視図である。1 is a perspective view of a seat reclining device according to an embodiment of the present invention. （ａ）はシートリクライニング装置の正面図であり、（ｂ）は（ａ）のＡ−Ａ線断面図である。(A) is a front view of a seat reclining device, (b) is an AA line sectional view of (a). シートリクライニング装置の背面図である。It is a rear view of a seat reclining device.

以下、本発明の実施形態を図面とともに詳述する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

シート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作動伝動機構を介在させることにより、シートクッションに対するシートバックの角度を調整できるようにしたものである。   The seat reclining device can adjust the angle of the seat back with respect to the seat cushion by interposing an operation transmission mechanism between the bracket provided on the seat cushion and the bracket provided on the seat back.

本実施形態に係るシートリクライニング装置１は、ラウンドリクライナ―とも称されるもので、前記作動伝動機構を一つのユニットにしたものである。図１から図３に示すように、シートリクライニング装置１は、シートクッション（図示せず）の後端に設けられたブラケット（以下、固定ブラケットという）２に結合した第一部材３と、シートバック（図示せず）の下端に設けられたブラケット（以下、アームブラケットという）４に結合した第二部材５と、駆動部材６と、シートバックに固定され駆動部材６を回転駆動するモーター（図示せず）と、から主に構成される。駆動部材６には、モーターの入力軸を挿入して結合するために、軸方向溝（スプライン）６ａが円周方向に間隔をおいて複数形成されている。シートリクライニング装置１は、駆動部材６がいずれかの方向へ回転すると、第二部材５が第一部材３に対して駆動部材６の回転方向とは逆方向に高い減速比で回転するように構成される。   The seat reclining device 1 according to the present embodiment is also referred to as a round recliner, in which the operation transmission mechanism is integrated into one unit. As shown in FIGS. 1 to 3, a seat reclining device 1 includes a first member 3 coupled to a bracket (hereinafter referred to as a fixed bracket) 2 provided at a rear end of a seat cushion (not shown), a seat back A second member 5 coupled to a bracket (hereinafter referred to as an arm bracket) 4 provided at the lower end (not shown), a driving member 6, and a motor (not shown) fixed to the seat back and driving the driving member 6 to rotate. Z)), and is mainly composed of. A plurality of axial grooves (splines) 6a are formed in the drive member 6 at intervals in the circumferential direction in order to insert and couple the input shaft of the motor. The seat reclining device 1 is configured such that when the driving member 6 rotates in any direction, the second member 5 rotates with a high reduction ratio in a direction opposite to the rotation direction of the driving member 6 with respect to the first member 3. Is done.

第一部材３における第二部材５との対向面に、円形の凹部３ａが形成され、凹部３ａの内周には、所定歯数の内歯を有する内歯歯車７が形成されている。一方、第二部材５の外周には、所定歯数の外歯を有する外歯歯車８が形成されている。第二部材５を第一部材３の凹部３ａ内に配置することにより、第一部材３の内歯歯車７と第二部材５の外歯歯車８とが互いに噛み合うように構成される。   A circular recess 3a is formed on the surface of the first member 3 facing the second member 5, and an internal gear 7 having a predetermined number of teeth is formed on the inner periphery of the recess 3a. On the other hand, an external gear 8 having a predetermined number of external teeth is formed on the outer periphery of the second member 5. By disposing the second member 5 in the recess 3 a of the first member 3, the internal gear 7 of the first member 3 and the external gear 8 of the second member 5 are configured to mesh with each other.

内歯歯車７における内歯の歯数が例えば３４であるのに対し、外歯歯車８における外歯の歯数は３３であり、外歯歯車８の歯数が内歯歯車７の歯数よりも一つだけ少ない。そして、外歯歯車８の歯数が内歯歯車７の歯数よりも少ないために、内歯歯車７と外歯歯車８とを噛み合わせた状態では、図３に示されるように、外歯歯車８の中心Ｏ２が内歯歯車７の中心Ｏ１に対して偏心した位置に位置するようになっている。   The number of teeth of the internal gear 7 is 34, for example, whereas the number of teeth of the external gear 8 is 33, and the number of teeth of the external gear 8 is greater than the number of teeth of the internal gear 7. There is only one less. Since the number of teeth of the external gear 8 is smaller than the number of teeth of the internal gear 7, when the internal gear 7 and the external gear 8 are engaged with each other, as shown in FIG. The center O2 of the gear 8 is located at a position eccentric with respect to the center O1 of the internal gear 7.

シートリクライニング装置１には、内歯歯車７に対して外歯歯車８が噛み合う噛合部Ｈを円周方向に移行させるための機構が設けられる。この機構は、以下のように構成される。   The seat reclining device 1 is provided with a mechanism for shifting the meshing portion H in which the external gear 8 meshes with the internal gear 7 in the circumferential direction. This mechanism is configured as follows.

第一部材３の内部に、内歯歯車７と同心の第一軸受筒３ｂが形成され、第一軸受筒３ｂの内周面にすべり軸受としてブッシュ９を圧入することにより、ブッシュ９の内部に内歯歯車７と同心の内周面が形成されている。一方、第二部材５には、外歯歯車８と同心の第二軸受筒５ａが形成されている。そして、第二部材５における外歯歯車８の部分を第一部材３の凹部３ａへ入れ込んで内歯歯車７と外歯歯車８とを噛み合わせることにより、ブッシュ９の内周面と第二軸受筒５ａの外周面との間に、円環状の偏心空間１０が形成されている。偏心空間１０の幅広空間側に、一対の楔部材１１が配置される。一対の楔部材１１が偏心空間１０内を、ブッシュ９の内周面と第二軸受筒５ａの外周面とに摺動しながら円周方向に移動することにより、外歯歯車８の中心Ｏ２が内歯歯車７の中心Ｏ１を中心として旋回する。また、外歯歯車８における一対の楔部材１１と対応する部分が、内歯歯車７側へ押されて噛合部Ｈが生じ、噛合部Ｈが円周方向に移行していくようになっている。   A first bearing cylinder 3 b concentric with the internal gear 7 is formed inside the first member 3, and the bush 9 is press-fitted into the inner peripheral surface of the first bearing cylinder 3 b as a slide bearing. An inner peripheral surface concentric with the internal gear 7 is formed. On the other hand, the second member 5 is formed with a second bearing cylinder 5 a concentric with the external gear 8. Then, the portion of the external gear 8 in the second member 5 is inserted into the recess 3 a of the first member 3, and the internal gear 7 and the external gear 8 are engaged with each other, so that the inner peripheral surface of the bush 9 and the second An annular eccentric space 10 is formed between the outer peripheral surface of the bearing cylinder 5a. A pair of wedge members 11 are arranged on the wide space side of the eccentric space 10. When the pair of wedge members 11 moves in the circumferential direction while sliding in the eccentric space 10 between the inner peripheral surface of the bush 9 and the outer peripheral surface of the second bearing cylinder 5a, the center O2 of the external gear 8 is moved. It turns around the center O1 of the internal gear 7. Further, the portions corresponding to the pair of wedge members 11 in the external gear 8 are pushed toward the internal gear 7 side to form the meshing portion H, and the meshing portion H shifts in the circumferential direction. .

単一の楔部材１１を用い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。常にバックラッシュのない状態を維持するため、一対の楔部材１１を用い、一対の楔部材１１を円周方向の互いに離間する方向に付勢する付勢部材（ばね）１２を設けて対応している。付勢部材１２は、リング状を有し、両端が軸方向に曲げられてそれぞれ楔部材１１に係合するとともに、互いに離間する方向に付勢力を有している。   When the single wedge member 11 is used, the backlash at the meshing portion H increases or decreases when there is a variation in dimensions. In order to maintain a state without backlash at all times, a pair of wedge members 11 is used, and a biasing member (spring) 12 for biasing the pair of wedge members 11 in the circumferential direction is provided. Yes. The urging member 12 has a ring shape, and both ends thereof are bent in the axial direction so as to engage with the wedge members 11 and have urging forces in directions away from each other.

シートリクライニング装置１には、前述の各部材が組み付けられた状態で、第一部材３と第二部材５とが相対的に回転しうるように、第一部材３及び第二部材５の外周を覆って軸方向への相対移動を規制する連結環１３が設けられる。   The seat reclining device 1 has outer peripheries of the first member 3 and the second member 5 so that the first member 3 and the second member 5 can relatively rotate in a state where the above-described members are assembled. A connecting ring 13 that covers and restricts relative movement in the axial direction is provided.

また、図２（ｂ）に示すように、偏心空間１０は、軸方向の一方側面が開放されており、この開放側面に、駆動部材６と付勢部材１２とが径方向に並んで配置される。このため、シートリクライニング装置１には、駆動部材６、一対の楔部材１１及び付勢部材１２の脱落を防止するため、駆動部材６及び付勢部材１２の側面を覆う蓋部材１４が設けられる。   Further, as shown in FIG. 2B, the eccentric space 10 has one side surface in the axial direction opened, and the driving member 6 and the biasing member 12 are arranged side by side in the radial direction on the opened side surface. The For this reason, the seat reclining device 1 is provided with a lid member 14 that covers the side surfaces of the driving member 6 and the biasing member 12 in order to prevent the driving member 6, the pair of wedge members 11, and the biasing member 12 from falling off.

内歯歯車７を有する第一部材３の外側面に、円周方向に間隔をおいて複数の円弧状突起１５が形成されている。一方、偏心空間１０内の駆動部材６、一対の楔部材１１及び付勢部材１２を覆う蓋部材１４の外周側には、第一部材３側に向かって延びる第一フランジ１６が円周方向に間隔をおいて複数形成されており、第一フランジ１６の外周面は、円弧状突起１５の内周面に嵌合される。また、第一フランジ１６の外周面は、第一フランジ１６の弾性によって円弧状突起１５の内周面に圧接するように構成される。   A plurality of arcuate protrusions 15 are formed on the outer surface of the first member 3 having the internal gear 7 at intervals in the circumferential direction. On the other hand, a first flange 16 extending toward the first member 3 side is provided in the circumferential direction on the outer peripheral side of the lid member 14 that covers the drive member 6, the pair of wedge members 11, and the biasing member 12 in the eccentric space 10. A plurality of the flanges are formed at intervals, and the outer peripheral surface of the first flange 16 is fitted to the inner peripheral surface of the arcuate protrusion 15. Further, the outer peripheral surface of the first flange 16 is configured to be in pressure contact with the inner peripheral surface of the arc-shaped protrusion 15 by the elasticity of the first flange 16.

また、蓋部材１４の外周側には、第一フランジ１６の間の部分に、円周方向に隣り合う円弧状突起１５の間に嵌合されて蓋部材１４の円周方向の位置決めを行う第二フランジ１７が複数形成されている。第二フランジ１７は、その端部から半径方向外側へ延びて円弧状突起１５の外周面と一致する外形のつば部１８を有する。すなわち、つば部１８は、円弧状突起１５の外周面と一致する外径を有する円弧形状に形成されている。   In addition, on the outer peripheral side of the lid member 14, a portion between the first flanges 16 is fitted between the arc-shaped protrusions 15 adjacent in the circumferential direction to position the lid member 14 in the circumferential direction. A plurality of two flanges 17 are formed. The second flange 17 has a flange portion 18 having an outer shape that extends radially outward from the end portion thereof and coincides with the outer peripheral surface of the arc-shaped protrusion 15. That is, the collar portion 18 is formed in an arc shape having an outer diameter that coincides with the outer peripheral surface of the arc-shaped protrusion 15.

そして、車両用シートのフレームに固定される固定ブラケット２には、円弧状突起１５の外周面が嵌合する円形孔１９が形成され、この円形孔１９に沿って円弧状突起１５の外周面及び第二フランジ１７のつば部１８の外周面を溶接にて結合する。このようにすることにより、嵌合した円弧状突起１５の外周面及び第二フランジ１７のつば部１８の外周面と固定ブラケット２の円形孔１９の内周面とを突き合わせるように嵌合配置する。この状態で、この嵌合面に沿って溶接することにより、第一部材３及び蓋部材１４と固定ブラケット２とを結合する結合部２０が連続的に形成される。また、固定ブラケット２は、円形孔１９の縁部から半径方向内側へ突出し、円周方向に隣り合う円弧状突起１５の間に嵌合される位置決め突起２１を有する。この位置決め突起２１は、蓋部材１４の第二フランジ１７が係合する部分とは別に第一部材３に設けられた、円周方向に隣り合う円弧状突起１５間の係合部２２に嵌合されるようになっている。   The fixing bracket 2 fixed to the frame of the vehicle seat is formed with a circular hole 19 into which the outer peripheral surface of the arc-shaped protrusion 15 is fitted, and along the circular hole 19, the outer peripheral surface of the arc-shaped protrusion 15 and The outer peripheral surface of the flange portion 18 of the second flange 17 is joined by welding. By doing so, the outer peripheral surface of the fitted arcuate protrusion 15 and the outer peripheral surface of the flange portion 18 of the second flange 17 are fitted and arranged so as to abut the inner peripheral surface of the circular hole 19 of the fixed bracket 2. To do. In this state, by welding along the fitting surface, the coupling portion 20 that couples the first member 3 and the lid member 14 and the fixed bracket 2 is continuously formed. Further, the fixed bracket 2 has a positioning projection 21 that protrudes radially inward from the edge of the circular hole 19 and is fitted between the arc-shaped projections 15 adjacent in the circumferential direction. This positioning projection 21 is fitted to an engagement portion 22 between the arc-shaped projections 15 adjacent to each other in the circumferential direction provided on the first member 3 separately from the portion where the second flange 17 of the lid member 14 is engaged. It has come to be.

外歯歯車８を有する第二部材５の外側面には、円環状突起２３が形成され、この円環状突起２３は一部が切り欠かれた切欠き部２４を有する形状とされている。一方、車両用シートのフレームに固定されるアームブラケット４には、円環状突起２３の外周が係合する円形孔２５が形成され、この円形孔２５に沿って円環状突起２３の外周を溶接にて結合する。このようにすることにより、円環状突起２３の外周とアームブラケット４の円形孔２５とに沿って、第二部材５とアームブラケット４とを結合する結合部２６が連続的に形成される。また、アームブラケット４は、円形孔２５の縁部から半径方向内側へ突出する位置決め突起２７を有する。この位置決め突起２７は、第二部材５における円環状突起２３の切欠き部２４に嵌合されるようになっている。   An annular protrusion 23 is formed on the outer surface of the second member 5 having the external gear 8, and the annular protrusion 23 has a shape having a cutout portion 24 that is partially cut away. On the other hand, the arm bracket 4 fixed to the frame of the vehicle seat is formed with a circular hole 25 with which the outer periphery of the annular protrusion 23 engages, and the outer periphery of the annular protrusion 23 is welded along the circular hole 25. And combine. By doing in this way, the coupling | bond part 26 which couple | bonds the 2nd member 5 and the arm bracket 4 is continuously formed along the outer periphery of the annular protrusion 23, and the circular hole 25 of the arm bracket 4. FIG. Further, the arm bracket 4 has a positioning protrusion 27 that protrudes radially inward from the edge of the circular hole 25. The positioning projection 27 is fitted into the notch 24 of the annular projection 23 in the second member 5.

次に、第一部材３及び蓋部材１４と固定ブラケット２とを固定する手順の一例を説明する。   Next, an example of a procedure for fixing the first member 3 and the lid member 14 to the fixing bracket 2 will be described.

まず、連結環１３を用いて第一部材３と第二部材５とを組み付ける。さらに、第一部材３の第一軸受筒３ｂ（ブッシュ９）の内周面と第二部材５の第二軸受筒５ａの外周面との間に形成される偏心空間１０内に、一対の楔部材１１、付勢部材１２、及び駆動部材６を順に配置する。   First, the first member 3 and the second member 5 are assembled using the connecting ring 13. Further, a pair of wedges is formed in the eccentric space 10 formed between the inner peripheral surface of the first bearing cylinder 3b (bush 9) of the first member 3 and the outer peripheral surface of the second bearing cylinder 5a of the second member 5. The member 11, the biasing member 12, and the drive member 6 are arranged in order.

次いで、蓋部材１４の第一フランジ１６の外周面を第一部材３の円弧状突起１５の内周面に圧入することにより、蓋部材１４を第一部材３に仮止めする。次いで、第一部材３の円弧状突起１５の外周面を固定ブラケット２の円形孔１９に嵌合することにより、固定ブラケット２を第一部材３の外側面に重ね合わせる。そして、第一部材３の円弧状突起１５の外周面及び蓋部材１４の第二フランジ１７のつば部１８の外周面と固定ブラケット２の円形孔１９の内周面とを、この嵌合面に沿ってレーザー溶接することにより、第一部材３及び蓋部材１４と固定ブラケット２とを固定する。すなわち、第一部材３と固定ブラケット２とを溶接する際に、蓋部材１４も併せて溶接して固定するようにしている。   Next, the lid member 14 is temporarily fixed to the first member 3 by press-fitting the outer circumferential surface of the first flange 16 of the lid member 14 into the inner circumferential surface of the arcuate protrusion 15 of the first member 3. Next, the fixing bracket 2 is overlapped with the outer surface of the first member 3 by fitting the outer peripheral surface of the arc-shaped protrusion 15 of the first member 3 into the circular hole 19 of the fixing bracket 2. Then, the outer peripheral surface of the arc-shaped protrusion 15 of the first member 3, the outer peripheral surface of the collar portion 18 of the second flange 17 of the lid member 14, and the inner peripheral surface of the circular hole 19 of the fixing bracket 2 are used as this fitting surface. The first member 3, the lid member 14, and the fixing bracket 2 are fixed by laser welding along. That is, when the first member 3 and the fixing bracket 2 are welded, the lid member 14 is also welded and fixed together.

次に、本実施形態に係るシートリクライニング装置１の基本動作について説明する。   Next, the basic operation of the seat reclining device 1 according to this embodiment will be described.

図示しないモーターにより駆動部材６が円周方向のいずれかの方向へ回転駆動されると、駆動部材６は、一対の楔部材１１の一方を押すこととなる。このとき、付勢部材１２が少し圧縮され、圧縮された分だけ他方の楔部材１１が同じ方向へ少し移動するということを繰り返しながら、一対の楔部材１１が偏心空間１０の内部で円周方向に移動する。これにより、円周方向における一対の楔部材１１と対応する部分で内歯歯車７と外歯歯車８とが噛みあい、噛み合う部分である噛合部Ｈが円周方向に移行していく。噛合部Ｈが一回転すると、外歯歯車８の歯数が内歯歯車７の歯数よりも一つだけ少ないことから、外歯歯車８が、駆動部材６の回転方向とは逆方向に１歯分だけ回転する。このため、シートバックに結合された第一部材３に対して第二部材５がシートクッションとともに駆動部材６の回転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こととなる。その結果として、シートバックがシートクッションに対して回動する。   When the driving member 6 is rotationally driven in any one of the circumferential directions by a motor (not shown), the driving member 6 pushes one of the pair of wedge members 11. At this time, while the biasing member 12 is slightly compressed and the other wedge member 11 is moved a little in the same direction by the amount of compression, the pair of wedge members 11 is circumferential in the eccentric space 10. Move to. Thereby, the internal gear 7 and the external gear 8 mesh with each other in a portion corresponding to the pair of wedge members 11 in the circumferential direction, and the meshing portion H that is the meshing portion shifts in the circumferential direction. When the meshing portion H makes one rotation, the number of teeth of the external gear 8 is one less than the number of teeth of the internal gear 7, so that the external gear 8 is 1 in the direction opposite to the rotation direction of the drive member 6. Rotates by the amount of teeth. For this reason, the second member 5 is decelerated at a high reduction ratio in the direction opposite to the rotation direction of the drive member 6 together with the seat cushion and relatively rotated with respect to the first member 3 coupled to the seat back. . As a result, the seat back rotates with respect to the seat cushion.

以下に、本実施形態による作用効果を説明する。   Below, the effect by this embodiment is demonstrated.

（１）本実施形態に係るシートリクライニング装置１は、内歯歯車７を有するとともに、内歯歯車７と同心の第一軸受筒３ｂを有する第一部材３と、歯数が内歯歯車７よりも少ない外歯歯車８を有するとともに、外歯歯車８と同心の第二軸受筒５ａを有する第二部材５と、内歯歯車７と外歯歯車８とを噛み合わせることにより第一軸受筒３ｂと第二軸受筒５ａとの間に形成された偏心空間１０に配置される一対の楔部材１１と、一対の楔部材１１を互いに離間するように付勢するリング状の付勢部材１２と、一対の楔部材１１を円周方向に押して回動させる駆動部材６と、付勢部材１２及び駆動部材６の側面を覆う蓋部材１４と、第一部材３及び第二部材５の外周を覆って軸方向への相対移動を規制する連結環１３と、を備える。第一部材３は、外側面に円周方向に間隔をおいて複数形成された円弧状突起１５を有する。蓋部材１４は、円弧状突起１５の内周面に嵌合される第一フランジ１６と、円周方向に隣り合う円弧状突起１５の間に嵌合される第二フランジ１７と、を有する。第二フランジ１７は、その端部から半径方向外側へ延びるつば部１８を有し、シートのフレームに固定される固定ブラケット２が、円弧状突起１５の外周面が嵌合する円形孔１９を有している。そして、円弧状突起１５の外周面と第二フランジ１７のつば部１８の外周面とが円形孔１９の内周面に嵌合されており、この嵌合面に沿って、第一部材３及び蓋部材１４と固定ブラケット２とを結合する結合部２０が形成されている。   (1) The seat reclining device 1 according to this embodiment includes an internal gear 7, a first member 3 having a first bearing cylinder 3 b concentric with the internal gear 7, and the number of teeth from the internal gear 7. By engaging the second member 5 having a small number of external gears 8 and having a second bearing cylinder 5a concentric with the external gear 8, and the internal gear 7 and the external gear 8, the first bearing cylinder 3b. A pair of wedge members 11 disposed in an eccentric space 10 formed between the second bearing cylinder 5a, and a ring-shaped biasing member 12 that biases the pair of wedge members 11 away from each other, A driving member 6 that pushes and rotates the pair of wedge members 11 in the circumferential direction, a cover member 14 that covers the side surfaces of the biasing member 12 and the driving member 6, and the outer periphery of the first member 3 and the second member 5. And a connecting ring 13 for restricting relative movement in the axial direction. The first member 3 has a plurality of arcuate protrusions 15 formed on the outer surface at intervals in the circumferential direction. The lid member 14 includes a first flange 16 fitted to the inner peripheral surface of the arc-shaped protrusion 15 and a second flange 17 fitted between the arc-shaped protrusions 15 adjacent in the circumferential direction. The second flange 17 has a flange portion 18 extending radially outward from an end thereof, and the fixing bracket 2 fixed to the seat frame has a circular hole 19 into which the outer peripheral surface of the arc-shaped protrusion 15 is fitted. is doing. The outer peripheral surface of the arcuate protrusion 15 and the outer peripheral surface of the flange portion 18 of the second flange 17 are fitted to the inner peripheral surface of the circular hole 19, and along the fitting surface, the first member 3 and A connecting portion 20 that connects the lid member 14 and the fixed bracket 2 is formed.

本実施形態に係るシートリクライニング装置１においては、固定ブラケット２と蓋部材１４とは半径方向に配置されて、第一部材３の外側面と固定ブラケット２の内側面との間に蓋部材１４が存在しないため、固定ブラケット２とアームブラケット４との間隔（オフセット量）を小さくすることが可能になる。したがって、固定ブラケット２及びアームブラケット４に倒れが生じてシートリクライニング装置１にこじりが生じることを抑制することができ、シートリクライニング装置１の強度が低下することを抑制することができる。   In the seat reclining device 1 according to the present embodiment, the fixing bracket 2 and the lid member 14 are arranged in the radial direction, and the lid member 14 is disposed between the outer surface of the first member 3 and the inner surface of the fixing bracket 2. Since it does not exist, the interval (offset amount) between the fixed bracket 2 and the arm bracket 4 can be reduced. Therefore, it is possible to prevent the seat reclining device 1 from being twisted due to the fixed bracket 2 and the arm bracket 4 falling, and to suppress the strength of the seat reclining device 1 from being lowered.

また、本実施形態に係るシートリクライニング装置１では、蓋部材１４が荷重受けをしない構造であり、蓋部材１４の板厚を従来構造と比較して薄くすることができるため、シートリクライニング装置１の軽量化を図ることが可能になる。   Further, in the seat reclining device 1 according to the present embodiment, the lid member 14 has a structure that does not receive a load, and the plate thickness of the lid member 14 can be reduced as compared with the conventional structure. It is possible to reduce the weight.

（２）円弧状突起１５の外周面と第二フランジ１７のつば部１８の外周面とが同じ半径の円弧で形成されている。   (2) The outer peripheral surface of the arc-shaped protrusion 15 and the outer peripheral surface of the flange portion 18 of the second flange 17 are formed by circular arcs having the same radius.

円弧状突起１５の外周面と第二フランジ１７のつば部１８の外周面とを一致させることで、固定ブラケット２の円形孔１９に沿って結合することを容易に行うことができる。   By matching the outer peripheral surface of the arcuate protrusion 15 and the outer peripheral surface of the flange portion 18 of the second flange 17, it is possible to easily perform coupling along the circular hole 19 of the fixed bracket 2.

（３）第一部材３及び蓋部材１４と固定ブラケット２とは、溶接により結合され、結合部２０は、円形孔１９に沿って連続的に形成されている。   (3) The first member 3 and the lid member 14 and the fixed bracket 2 are coupled by welding, and the coupling portion 20 is continuously formed along the circular hole 19.

固定ブラケット２の円形孔１９に沿って溶接を連続的に行うことで、第一部材３と固定ブラケット２との溶接結合、蓋部材１４と固定ブラケット２との溶接結合を同時に行うことができる。   By continuously performing welding along the circular hole 19 of the fixed bracket 2, the first member 3 and the fixed bracket 2 can be welded together and the lid member 14 and the fixed bracket 2 can be welded simultaneously.

（４）第一フランジ１６の外周面は、第一フランジ１６の弾性によって円弧状突起１５の内周面に圧接している。   (4) The outer peripheral surface of the first flange 16 is in pressure contact with the inner peripheral surface of the arcuate protrusion 15 by the elasticity of the first flange 16.

蓋部材１４が第一フランジ１６の圧接力によって第一部材３に保持されるため、ユニット状態で蓋部材１４が第一部材３から外れるのを抑制することができる。   Since the lid member 14 is held by the first member 3 by the pressing force of the first flange 16, it is possible to suppress the lid member 14 from being detached from the first member 3 in a unit state.

（５）固定ブラケット２は、円形孔１９の縁部から半径方向内側へ突出し、円周方向に隣り合う円弧状突起１５の間に嵌合される位置決め突起２１を有している。   (5) The fixed bracket 2 has a positioning projection 21 that protrudes radially inward from the edge of the circular hole 19 and is fitted between the arc-shaped projections 15 adjacent in the circumferential direction.

このようにすることにより、固定ブラケット２と第一部材３との円周方向の位置決めを容易に行うことができる。   By doing in this way, the circumferential positioning of the fixing bracket 2 and the first member 3 can be easily performed.

ところで、本発明のシートリクライニング装置は前述の実施形態に例をとって説明したが、この実施形態に限ることなく本発明の要旨を逸脱しない範囲で他の実施形態を各種採用することができる。   By the way, the seat reclining device of the present invention has been described by taking the example of the above-described embodiment. However, the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.

例えば、前述の実施形態では、シートバックの下端の固定ブラケット２に第一部材３を結合し、シートクッションの後端のアームブラケット４に第二部材５を結合するとしたが、これに限定されず、第一部材３と第二部材５とを入れ替えてもよい。   For example, in the above-described embodiment, the first member 3 is coupled to the fixed bracket 2 at the lower end of the seat back, and the second member 5 is coupled to the arm bracket 4 at the rear end of the seat cushion. The first member 3 and the second member 5 may be interchanged.

また、内歯歯車７の歯数及び外歯歯車８の歯数は前述の実施形態で挙げた例に限定されず、外歯歯車８の歯数が内歯歯車７の歯数よりも少なければよい。また、レーザー溶接により結合する例を挙げたが、これに限定されず、従来一般的なアーク溶接を結合に用いてもよい。また、溶接を連続的に行うとしたが、これに限定されず、溶接を断続的に行うようにしてもよい。   Further, the number of teeth of the internal gear 7 and the number of teeth of the external gear 8 are not limited to the examples given in the above-described embodiment, and the number of teeth of the external gear 8 is less than the number of teeth of the internal gear 7. Good. Moreover, although the example couple | bonded by laser welding was given, it is not limited to this, You may use a conventional general arc welding for a coupling | bonding. Moreover, although welding was performed continuously, it is not limited to this, You may make it perform welding intermittently.

１ シートリクライニング装置
２ ブラケット（固定ブラケット）
３ 第一部材
３ｂ 第一軸受筒
５ 第二部材
５ａ 第二軸受筒
６ 駆動部材
７ 内歯歯車
８ 外歯歯車
１０ 偏心空間
１１ 楔部材
１２ 付勢部材
１３ 連結環
１４ 蓋部材
１５ 円弧状突起
１６ 第一フランジ
１７ 第二フランジ
１８ つば部
１９ 円形孔
２０ 結合部
２１ 位置決め突起 1 Seat reclining device 2 Bracket (fixed bracket)
3 First member 3b First bearing cylinder 5 Second member 5a Second bearing cylinder 6 Drive member 7 Internal gear 8 External gear 10 Eccentric space 11 Wedge member 12 Energizing member 13 Connecting ring 14 Lid member 15 Arc-shaped protrusion 16 First flange 17 Second flange 18 Collar portion 19 Circular hole 20 Joint portion 21 Positioning protrusion

Claims (6)

内歯歯車を有するとともに、該内歯歯車と同心の第一軸受筒を有する第一部材と、
歯数が前記内歯歯車よりも少ない外歯歯車を有するとともに、該外歯歯車と同心の第二軸受筒を有する第二部材と、
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一軸受筒と前記第二軸受筒との間に形成された偏心空間に配置される一対の楔部材と、
前記一対の楔部材を互いに離間するように付勢するリング状の付勢部材と、
前記一対の楔部材を円周方向に押して回動させる駆動部材と、
前記付勢部材及び前記駆動部材の側面を覆う蓋部材と、
前記第一部材及び前記第二部材の外周を覆って軸方向への相対移動を規制する連結環と、を備え、
前記第一部材は、外側面に円周方向に間隔をおいて複数形成された円弧状突起を有し、
前記蓋部材は、前記円弧状突起の内周面に嵌合される第一フランジと、円周方向に隣り合う前記円弧状突起の間に嵌合される第二フランジと、を有し、
前記第二フランジは、その端部から半径方向外側へ延びるつば部を有し、
シートのフレームに固定されるブラケットが、前記円弧状突起の外周面が嵌合する円形孔を有しており、
前記円弧状突起の外周面と前記第二フランジの前記つば部の外周面とが前記円形孔の内周面に嵌合されており、この嵌合面に沿って、前記第一部材及び前記蓋部材と前記ブラケットとを結合する結合部が形成されている
ことを特徴とするシートリクライニング装置。 A first member having an internal gear and a first bearing cylinder concentric with the internal gear;
A second member having an external gear having a smaller number of teeth than the internal gear and having a second bearing cylinder concentric with the external gear;
A pair of wedge members disposed in an eccentric space formed between the first bearing cylinder and the second bearing cylinder by meshing the internal gear and the external gear;
A ring-shaped biasing member that biases the pair of wedge members away from each other;
A drive member for rotating the pair of wedge members in the circumferential direction; and
A lid member that covers side surfaces of the biasing member and the driving member;
A coupling ring that covers the outer periphery of the first member and the second member and restricts relative movement in the axial direction;
The first member has a plurality of arc-shaped protrusions formed on the outer surface at intervals in the circumferential direction,
The lid member has a first flange fitted to the inner peripheral surface of the arc-shaped protrusion, and a second flange fitted between the arc-shaped protrusions adjacent in the circumferential direction,
The second flange has a flange extending radially outward from an end thereof;
A bracket fixed to the frame of the seat has a circular hole into which the outer peripheral surface of the arc-shaped protrusion is fitted;
An outer peripheral surface of the arc-shaped protrusion and an outer peripheral surface of the collar portion of the second flange are fitted to an inner peripheral surface of the circular hole, and the first member and the lid are fitted along the fitting surface. A seat reclining device characterized in that a joint for joining a member and the bracket is formed. 前記第二フランジの前記つば部は、前記円弧状突起の外周面と一致する外径を有する円弧に形成されていることを特徴とする請求項１に記載のシートリクライニング装置。   The seat reclining device according to claim 1, wherein the flange portion of the second flange is formed in an arc having an outer diameter coinciding with an outer peripheral surface of the arc-shaped protrusion. 前記第一部材及び前記蓋部材と前記ブラケットとは、溶接により結合され、
前記結合部は、前記円形孔に沿って連続的に形成されている
ことを特徴とする請求項１又は２に記載のシートリクライニング装置。 The first member and the lid member and the bracket are coupled by welding,
The seat reclining device according to claim 1, wherein the coupling portion is continuously formed along the circular hole. 前記第一フランジの外周面は、前記第一フランジの弾性によって前記円弧状突起の内周面に圧接していることを特徴とする請求項１から３のいずれか一項に記載のシートリクライニング装置。   4. The seat reclining device according to claim 1, wherein an outer peripheral surface of the first flange is in pressure contact with an inner peripheral surface of the arc-shaped protrusion by elasticity of the first flange. 5. . 前記ブラケットは、前記円形孔の縁部から半径方向内側へ突出し、円周方向に隣り合う前記円弧状突起の間に嵌合される位置決め突起を有していることを特徴とする請求項１から４のいずれか一項に記載のシートリクライニング装置。   2. The bracket includes a positioning protrusion that protrudes radially inward from an edge of the circular hole and is fitted between the arc-shaped protrusions adjacent in the circumferential direction. The seat reclining device according to any one of 4. 請求項１から５のいずれか一項に記載のシートリクライニング装置を製造する方法であって、
前記第一フランジの外周面を前記円弧状突起の内周面に圧入することにより前記蓋部材を前記第一部材に仮止めするステップと、
前記円弧状突起の外周面を前記円形孔に嵌合することにより前記ブラケットの一側面を前記第一部材の外側面に重ね合わせるステップと、
嵌合した前記円弧状突起の外周面及び前記第二フランジの前記つば部の外周面と前記円形孔の内周面とを、この嵌合面に沿ってレーザー溶接することにより、前記第一部材、前記蓋部材及び前記ブラケットを固定するステップと、
を含むことを特徴とするシートリクライニング装置の製造方法。 A method for manufacturing the seat reclining device according to any one of claims 1 to 5,
Temporarily fixing the lid member to the first member by press-fitting the outer peripheral surface of the first flange into the inner peripheral surface of the arc-shaped protrusion;
Superimposing one side surface of the bracket on the outer surface of the first member by fitting the outer peripheral surface of the arc-shaped protrusion into the circular hole;
The first member is formed by laser welding the outer peripheral surface of the arcuate protrusion and the outer peripheral surface of the flange portion of the second flange and the inner peripheral surface of the circular hole along the fitting surface. Fixing the lid member and the bracket; and
The manufacturing method of the seat reclining apparatus characterized by including.
JP2015209721A 2015-10-26 2015-10-26 Seat reclining device and manufacturing method thereof Expired - Fee Related JP6585993B2 (en)

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JP5487742B2 (en) * 2009-06-11 2014-05-07 トヨタ紡織株式会社 Vehicle seat coupling device
JP2011087843A (en) * 2009-10-26 2011-05-06 Imasen Electric Ind Co Ltd Reclining mechanism
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