JP4778733B2 - Vehicle seat reclining device - Google Patents

Vehicle seat reclining device Download PDF

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JP4778733B2
JP4778733B2 JP2005168949A JP2005168949A JP4778733B2 JP 4778733 B2 JP4778733 B2 JP 4778733B2 JP 2005168949 A JP2005168949 A JP 2005168949A JP 2005168949 A JP2005168949 A JP 2005168949A JP 4778733 B2 JP4778733 B2 JP 4778733B2
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base plate
teeth
gear
external gear
external
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JP2006340873A (en
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正 松本
光生 楢崎
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Fuji Kiko Co Ltd
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Fuji Kiko Co Ltd
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Priority to JP2005168949A priority Critical patent/JP4778733B2/en
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Priority to US11/448,732 priority patent/US7354108B2/en
Priority to CNB2006100916723A priority patent/CN100518584C/en
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この発明は車両用シートリクライニング装置に関するもので、特に、少歯数差内歯車方式の機構部を円形状に形成したラウンドタイプのリクライナーを有するものに関する。   The present invention relates to a vehicular seat reclining device, and more particularly to a vehicular seat reclining device having a round type recliner in which a small gear difference internal gear type mechanism is formed in a circular shape.

ラウンドタイプのリクライナーは、下記特許文献１，２に見られるように、シートクッション側取付アームに固定する円形突出部を有するベースプレートと、内歯とシートバック側取付アームに固定する円形突出部とを有する内歯ギヤと、前記ベースプレートに固定されるとともに内歯ギヤの内歯と噛合する歯数が内歯より１歯又は２歯少ない外歯とを有する外歯ギヤと、外歯ギヤと内歯ギヤを偏心した状態に支持するとともに、外歯ギヤに対して内歯ギヤを偏心駆動するカム手段と、内歯ギヤ、外歯ギヤ及びベースプレートを重ね合わせてその外周部を挟むように保持するホルダーリングとにより構成されている。
ベースプレートの円形突出部の外側には、シートクッション側取付アームに穿設された透孔と係合して溶接で固定するエンボス突起が、また、内歯ギヤの円形突出部の外側には、シートクッション側取付アームに対応して穿設された透孔と係合して溶接で固定するエンボス突起がそれぞれ形成されている。
特開２０００−１６６６７９ 仏追加特許ＦＲ−Ａ−２７５９３３３ 特開２００４−２２９９５１ As can be seen in Patent Documents 1 and 2 below, the round type recliner includes a base plate having a circular protrusion fixed to the seat cushion side mounting arm, and a circular protrusion fixed to the inner teeth and the seat back side mounting arm. An external gear having an internal gear, an external gear fixed to the base plate and meshing with the internal teeth of the internal gear with one or two teeth less than the internal gear, and the external gear and the internal gear A holder that supports the gear in an eccentric state and holds the outer peripheral portion of the cam means for eccentrically driving the internal gear with respect to the external gear and the internal gear, the external gear, and the base plate being overlapped. It consists of a ring.
On the outside of the circular protrusion of the base plate, there is an emboss projection that engages with a through-hole drilled in the seat cushion side mounting arm and is fixed by welding, and on the outside of the circular protrusion of the internal gear, Embossed protrusions are formed which engage with through holes formed corresponding to the cushion side mounting arms and are fixed by welding.
JP 2000-166679 A French additional patent FR-A-2759333 JP2004-229951

上述のように、ラウンドタイプのリクライナーは、内歯ギヤとベースプレートとの間に外歯ギヤをサンドイッチ状に挟んで構成され、ベースプレートと外歯ギヤとは一体的になるように、ベースプレートに外歯ギヤを圧入するための歯型部を形成している。しかし、ベースプレートに外歯ギヤを圧入する際、外歯ギヤとベースプレートの歯型部との寸法のバラツキにより圧入荷重が大きく変動する。両者間に若干の隙間を形成すると、その隙間により回転方向のガタが発生する惧れがある。   As described above, the round type recliner is configured by sandwiching the external gear between the internal gear and the base plate in a sandwich shape, and the base plate and the external gear are integrated with the external gear on the base plate. A tooth mold part for press-fitting the gear is formed. However, when the external gear is press-fitted into the base plate, the press-fit load varies greatly due to variations in dimensions between the external gear and the tooth mold portion of the base plate. If a slight gap is formed between the two, there is a concern that the gap in the rotational direction is generated by the gap.

また、特許文献１又は２の構造に特許文献３のようなくさび式ガタ押え構造を設ける場合には、内歯ギヤと外歯ギヤを噛み合わせた状態で一対のくさび部材とスプリングおよびセンターシャフトを組み付け、この後、外歯ギヤにベースプレートを圧入して固定する必要がある。そのため、ベースプレートと外歯ギヤを圧入する荷重が高いと、圧入が不充分となって幅方向に隙間が発生したり、荷重の負荷でベースプレートや内歯ギヤが変形する不具合が発生するおそれがある。   Further, when the wedge type ratchet structure as in Patent Document 3 is provided in the structure of Patent Document 1 or 2, a pair of wedge members, a spring, and a center shaft are connected with the internal gear and the external gear engaged. After assembly, it is necessary to press-fit and fix the base plate to the external gear. Therefore, if the load for press-fitting the base plate and the external gear is high, the press-fitting may be insufficient and a gap may be generated in the width direction, or the base plate and the internal gear may be deformed by the load. .

そこで、この発明は圧入荷重を低減して組み付け性を向上するとともに、ベースプレートと外歯ギヤとの回転方向のガタを有しないラウンドタイプの車両用シートリクライニング装置を提供する。   Accordingly, the present invention provides a round type seat reclining device for a vehicle that reduces the press-fitting load and improves the assemblability and does not have a backlash in the rotational direction of the base plate and the external gear.

この発明は上記課題を解決するため、請求項１によれば、円板を半抜きして円形凹部とシートクッション側取付アームに固定するための円形突出部とを形成したベースプレートと、円板を半抜きして円形凹部とシートバック側取付アームに固定するための外側突出部とを形成し該円形凹部の内周面に内歯を形成した内歯ギヤと、前記ベースプレートに固定されるとともに前記内歯ギヤの内歯より歯数が１歯又は２歯少ない外歯を有する外歯ギヤと、前記内歯ギヤを偏心駆動する偏心駆動手段と、前記内歯ギヤ、前記外歯ギヤ及び前記ベースプレートを重ね合わせてその外周部を挟むように支持するホルダーリングとを備えたシートリクライニング装置において、
前記ベースプレートには前記円形突出部に略六角形状の第２突出部を形成し、該第２突出部の略六角形状の頂点の部分に、前記シートクッション側取付アームの取付孔に嵌合するエンボスを形成し、
前記ベースプレートの前記円形凹部の内周面には、前記外歯ギヤの外歯と嵌合する複数の内歯を形成するとともに、前記エンボスと対応する位置に内歯の形成されない無歯部を設け、前記ベースプレートの前記内歯は、少なくとも円周方向へ所定の間隔で形成されている前記外歯ギヤの歯部間に圧入される歯型部と、前記外歯ギヤの歯部間に隙間を有して嵌合される歯型部とで構成し、
前記内歯ギヤの前記円形凹部に前記外歯ギヤと前記偏心駆動手段とを配置した状態で、前記ベースプレートの前記内歯を前記外歯ギヤの外歯に嵌合させたことを特徴とする車両用シートリクライニング装置を構成した。 Since this invention to solve the above problems, according to claim 1, a base plate to form a circular protrusion for fixing the circular recess and the seat cushion side mounting arm disc by half blanking, the disc a gear inner forming internal teeth on the inner peripheral surface of the circular recess forming an outer protruding portion for fixing the circular recess and the seat back side mounting arm by half blanking, it is fixed to the base plate the and external gear teeth than the inner teeth of the internal gear with one tooth or two teeth fewer external teeth, an eccentric drive means for eccentrically driving the internal gear, said internal gear, said external gear and said base plate In a seat reclining device provided with a holder ring that supports and overlaps the outer peripheral portion,
The base plate has a substantially hexagonal second protrusion formed on the circular protrusion, and an emboss that fits into a mounting hole of the seat cushion side mounting arm at a substantially hexagonal apex portion of the second protrusion. Form the
The inner peripheral surface of the circular recess of the base plate, thereby forming a plurality of internal teeth of the external teeth mate with the external gear, provided no teeth are not formed of the inner teeth in a position corresponding to the embossing The internal teeth of the base plate have a gap between a tooth mold portion press-fitted between the tooth portions of the external gear and at least a predetermined interval in the circumferential direction, and a tooth portion of the external gear. constituted by the tooth-shaped portion which is fitted with a,
A vehicle characterized in that the internal teeth of the base plate are fitted to the external teeth of the external gear in a state where the external gear and the eccentric drive means are arranged in the circular recess of the internal gear. A seat reclining device was constructed.

また、請求項２によれば、前記外歯ギヤは、前記内歯ギヤの前記円形凹部の深さと前記ベースプレートの前記円形凹部の深さとを加算した幅よりも少し薄い厚さに形成され、前記ベースプレートの前記円形凹部の底面には前記外歯ギヤに向けて突出して前記外歯ギヤの側面に接触可能な凸部が形成されていることを特徴とする請求項１に記載の車両用シートリクライニング装置を構成した。 According to claim 2, the external gear is formed to have a thickness slightly smaller than a width obtained by adding the depth of the circular recess of the internal gear and the depth of the circular recess of the base plate, 2. The vehicle seat reclining according to claim 1, wherein a convex portion that protrudes toward the external gear and contacts the side surface of the external gear is formed on a bottom surface of the circular concave portion of the base plate. Configured the device.

更に、請求項３によれば、前記圧入する歯型部は前記外歯ギヤの少なくとも円周方向へ略１２０度の間隔で３箇所に形成されていることを特徴とする請求項１または２に記載の車両用シートリクライニング装置を構成したものである。 Further, according to claim 3, tooth die unit for the press fit to claim 1 or 2, characterized in that it is formed in three places at intervals of at least approximately 120 degrees in the circumferential direction of the external gear The vehicle seat reclining device is configured.

ベースプレートの半抜き状に形成した円形凹部の内周面に外歯ギヤの外歯と嵌合する複数の内歯を形成するとともに、この内歯を外歯ギヤの歯部間に圧入される歯型部と、外歯ギヤの歯部間に隙間を有して嵌合される歯型部とで構成しているため、ベースプレートの内歯を外歯ギヤの外歯に圧入する際の圧入荷重を下げることができるとともに、回転方向のガタの発生を防止できる。   A plurality of internal teeth that fit with the external teeth of the external gear are formed on the internal peripheral surface of the circular recess formed in the half-cut shape of the base plate, and the internal teeth are press-fitted between the tooth portions of the external gear. Because it is composed of a mold part and a tooth mold part fitted with a gap between the tooth parts of the external gear, the press-fit load when the inner teeth of the base plate are press-fitted into the external teeth of the external gear Can be reduced, and play in the rotational direction can be prevented.

また、大荷重入力時には、嵌合する全ての内歯で荷重を受けることができ、ベースプレートと外歯ギヤの固定強度を強くできる。また、略１２０度の間隔を置いて圧入される内歯を形成することで圧入の安定化と圧入荷重の低減及びガタの発生防止をバランス良く実現できる。 Further, when a large load is input, the load can be received by all the internal teeth to be fitted, and the fixing strength of the base plate and the external gear can be increased. In addition, by forming the inner teeth that are press-fitted at an interval of approximately 120 degrees, it is possible to achieve a good balance between stabilization of press-fitting, reduction of the press-fitting load, and prevention of play.

本発明の実施の形態に係るシートリクライニング装置について図面を用いて説明する。図１にシートリクライニング装置機構部の分解斜視図を、図２に装置機構部の部品外観図を、図３にベースプレートの部品内面図を、図４に図２のＡ−Ａ断面図を、図５に図２からベースプレートを外した図を、図６にベースプレートの内歯の歯部と外歯ギヤの外歯の歯部との噛合状態を示す。図中、１０は装置機構部の外周に外歯を有する外歯ギヤ、２０はシートバック側取付アーム６０に固定される内歯ギヤ、３０はシートクッション側取付アーム７０に固定されるベースプレート、４０はセンターシャフト４１、ロックプレート４６、ロックスプリング４７からなる偏心駆動手段、５０は重ねられた内歯ギヤ２０、外歯ギヤ１０、ベースプレート３０の外周を取囲むホルダーリングである。 A seat reclining device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the seat reclining device mechanism, FIG. 2 is a component external view of the device mechanism, FIG. 3 is a component inner surface view of the base plate, FIG. 4 is a cross-sectional view taken along line AA of FIG. FIG. 5 shows a state in which the base plate is removed from FIG. 2, and FIG. 6 shows a meshing state between the tooth portion of the internal tooth of the base plate and the tooth portion of the external tooth of the external gear . In the figure, 10 is an external gear having external teeth on the outer periphery of the device mechanism portion, 20 is an internal gear fixed to the seat back side mounting arm 60 , 30 is a base plate fixed to the seat cushion side mounting arm 70 , 40 Is an eccentric drive means comprising a center shaft 41, a lock plate 46, and a lock spring 47, and 50 is a holder ring surrounding the outer periphery of the stacked internal gear 20, external gear 10, and base plate 30.

上記外歯ギヤ１０は、リング状を有し、外歯１４が全周に形成された外周面とメタルベアリング１５が圧入された内周面と、外周面と内周面との間の側面１３とからなる。   The external gear 10 has a ring shape, an outer peripheral surface on which outer teeth 14 are formed on the entire circumference, an inner peripheral surface in which a metal bearing 15 is press-fitted, and a side surface 13 between the outer peripheral surface and the inner peripheral surface. It consists of.

上記内歯ギヤ２０は、円板を同一中心で半抜きした円形凹部を有し、ベースプレート３０より大きな外径の外周部２１と、円形凹部の内周面に形成した内歯２２と、円形凹部の反対側に突出した外側突出部２３とからなり、この内歯ギヤ２０の歯数より外歯ギア１０の歯数は１歯又は２歯少なく形成されている。したがって、外歯ギア１０の歯部外径は内歯ギア２０の歯部外径より小さくなっている。外側突出部２３にはシートバック側取付アーム６０の取付孔６１に嵌合する６個のエンボス２４が形成され、中心部にはセンターシャフト４１の軸４２を回転可能に支持すると共に円形凹部の内側に向って突出するボス２５を有する。このボス２５はシートバック側取付アーム６０の前記６つの取付孔６１の中心部に形成した中心孔６２と中心を合致する。 The internal gear 20 has a circular concave portion in which a disc is half-cut at the same center, an outer peripheral portion 21 having an outer diameter larger than that of the base plate 30, an internal tooth 22 formed on the inner peripheral surface of the circular concave portion, and a circular concave portion. The number of teeth of the external gear 10 is one or two less than the number of teeth of the internal gear 20. Therefore, the tooth part outer diameter of the external gear 10 is smaller than the tooth part outer diameter of the internal gear 20. Six embossing 24 to be fitted in the mounting hole 61 of the seat back side mounting arm 60 is formed in the outer projecting portion 23, the inner side of the circular recess with a central portion rotatably supports the shaft 42 of the center shaft 41 It has the boss | hub 25 which protrudes toward . The boss 25 is aligned with the center hole 62 formed at the center of the six mounting holes 61 of the seat back side mounting arm 60.

上記ベースプレート３０は円板を同一中心で半抜きした円形凹部を有し、内歯ギヤ２０よりも少し小さい外径の外周部３１と円形凹部の内周面に形成した内歯３８と、円形凹部の反対側に突出した円形突出部３３とからなり、円形突出部３３にはシートクッション側取付アーム７０の取付孔７１に嵌合するエンボス３４が形成され、かつ、中心部にはシートクッション側取付アーム７０の中心孔７２と合致する中心孔３５が穿設されている。円形突出部３３の反対側の円形凹部の底面３９には、図２、図３及び図４に示すように、外歯ギヤ１０に向け突出して側面１３に接触可能な凸部３６が形成されている。 The base plate 30 has a circular concave portion obtained by half-cutting the disc at the same center, an outer peripheral portion 31 having an outer diameter slightly smaller than the internal gear 20, an inner tooth 38 formed on the inner peripheral surface of the circular concave portion, and a circular concave portion. The circular protrusion 33 is formed with an emboss 34 that fits into the mounting hole 71 of the seat cushion side mounting arm 70, and the seat cushion side mounting at the center. A center hole 35 that matches the center hole 72 of the arm 70 is formed. On the bottom surface 39 of the circular recess opposite to the circular protrusion 33, a convex portion 36 that protrudes toward the external gear 10 and can contact the side surface 13 is formed as shown in FIGS. 2, 3, and 4. Yes.

この凸部３６は円形突出部３３から半抜き形成した略六角形状の第２突出部３３ａの頂点を結ぶ辺の部分に沿って６個形成されている。また、エンボス３４はこの第２突出部３３ａの六角形の頂点の部分にそれぞれ形成される。この凸部３６は円形凹部の底面３９と内歯３８の間に形成される面取りよりも高く形成される。 Six convex portions 36 are formed along the side portion connecting the vertices of the substantially hexagonal second projecting portion 33 a that is half-cut from the circular projecting portion 33. Further, the emboss 34 is formed at each of the hexagonal apexes of the second protrusion 33a. The convex portion 36 is formed higher than the chamfer formed between the bottom surface 39 of the circular concave portion and the internal teeth 38 .

外歯ギヤ１０は、内歯ギヤ２０の円形凹部の深さと、ベースプレート３０の円形凹部の深さを加算した幅よりも少し薄い厚さに形成されている。これは、内歯ギヤ２０、外歯ギヤ１０及びベースプレート３０を重ねた際に内歯ギヤ２０の外周部２１とベースプレート３０の外周部３１の間に隙間が空かないようにするためである。 The external gear 10 is formed to have a thickness slightly smaller than the width obtained by adding the depth of the circular recess of the internal gear 20 and the depth of the circular recess of the base plate 30. This is to prevent a gap from being formed between the outer peripheral portion 21 of the internal gear 20 and the outer peripheral portion 31 of the base plate 30 when the internal gear 20, the external gear 10 and the base plate 30 are overlapped.

すなわち、外歯ギヤ１０の外歯１４とベースプレート３０の内歯３８との圧入は、偏心駆動手段４０を組み付けた後になるため、外歯ギヤ１０の一方の側面１３とベースプレート３０の底面３９との間に隙間が空いてしまうが、凸部３６を設けることで隙間を小さくすることができる。また、凸部３６を設けることで、ベースプレート３０の内歯３８と底面３９との間に面取りを設けることができ、応力集中を緩和し、ベースプレート３０の強度の向上や型寿命が向上する。 That is, the press-fitting of the external teeth 14 of the external gear 10 and the internal teeth 38 of the base plate 30 occurs after the eccentric drive means 40 is assembled, so that the one side surface 13 of the external gear 10 and the bottom surface 39 of the base plate 30 Although a gap is left between them, the gap can be reduced by providing the convex portion 36. Further, by providing the convex portion 36, it is possible to provide chamfering between the inner teeth 38 and the bottom surface 39 of the base plate 30 , thereby relaxing stress concentration and improving the strength of the base plate 30 and the mold life.

ここで、外歯ギヤ１０の外歯１４とベースプレート３０の内歯３８との圧入において、ベースプレート３０の内歯３８は、図６に示すように、外歯ギヤ１０の歯部間に隙間なく圧入される歯型部３８Ａと、外歯ギヤ１０の歯部間に隙間ｃを有して嵌合する歯型部３８Ｂとで構成される。この圧入される歯型部３８Ａは、ベースプレート３０の円形凹部の内周面に略１２０度の間隔で３箇所形成される。また、この圧入される歯型部３８Ａは、外歯ギヤ１０の外歯１４が嵌合する歯面間を狭くしているが、嵌合する内歯３８の歯幅を厚くすることで圧入となるようにしてもよい。なお、図３に示すように内歯３８は円周方向へ無歯部３８Ｃを有して不連続であるが、これはエンボス突起３４を形成するために必要なスペースを確保するためである。 Here, in the press-fitting of the external teeth 14 of the external gear 10 and the internal teeth 38 of the base plate 30, the internal teeth 38 of the base plate 30 are press-fitted without gaps between the teeth of the external gear 10 as shown in FIG. The tooth mold part 38 </ b> A and the tooth mold part 38 </ b> B fitted with a gap c between the tooth parts of the external gear 10. The tooth mold portions 38A to be press-fitted are formed at three locations on the inner peripheral surface of the circular recess of the base plate 30 at an interval of approximately 120 degrees. In addition, the press-fitted tooth mold portion 38A narrows the space between the tooth surfaces to which the external teeth 14 of the external gear 10 are fitted, but it is press-fitted by increasing the tooth width of the internal teeth 38 to be fitted. It may be made to become. As shown in FIG. 3, the inner teeth 38 are discontinuous with a toothless portion 38 </ b> C in the circumferential direction, which is to secure a space necessary for forming the embossed protrusions 34 .

上記センターシャフト４１は、上記内歯ギヤ２０のボス２５の内周面に回動可能に嵌合する円筒状の軸４２と、該軸４２の一端側で半径方向に延長して図４に示すようにベースプレート３０の第２突出部３３ａの反対側内に位置するフランジ部４３と、２つの駆動突起４５とを有する。該駆動突起４５は図５に示すように円弧状に形成された２つのくさび状のロックプレート４６の先端部４６ａにそれぞれ当接可能に設けられている。前記２つのロックプレート４６は、内歯ギヤ２０のボス２５と外歯ギヤ１０の孔に圧入されたメタルベアリング１５との間の偏心空間の幅広部分にそれぞれ摺動可能に配置されており、このロックプレート４６を互いに離間する方向へ押圧することでボス２５とメタルベアリング１５との偏心量、すなわち内歯ギヤ２０と外歯ギヤ１０との偏心が大きくなるように構成されている。図４に示すように前記フランジ部４３には、２つのロックプレート４６に当接してロックプレート４６の抜け方向への移動を阻止するロックプレート係止部４４が形成されており、軸４２の内部にはスプライン付きの制御用シャフトが嵌合可能なスプライン付きの孔４１ａが形成されている。 The center shaft 41 includes a cylindrical shaft 42 that rotatably fitted in the inner circumferential surface of the boss 25 of the internal gear 20, shown in FIG. 4 extend radially at one end side of the shaft 42 As described above, the base plate 30 has a flange portion 43 located on the opposite side of the second projecting portion 33 a and two drive protrusions 45. As shown in FIG. 5, the drive protrusion 45 is provided so as to be able to abut on the tip portions 46a of two wedge-shaped lock plates 46 formed in an arc shape . The two lock plates 46 are slidably disposed in the wide portion of the eccentric space between the boss 25 of the internal gear 20 and the metal bearing 15 press-fitted into the hole of the external gear 10. By pressing the lock plate 46 in a direction away from each other, the eccentric amount between the boss 25 and the metal bearing 15, that is, the eccentricity between the internal gear 20 and the external gear 10 is increased. As shown in FIG. 4, the flange portion 43 is formed with a lock plate engaging portion 44 that abuts against the two lock plates 46 and prevents the lock plate 46 from moving in the removal direction. Is formed with a splined hole 41a into which a splined control shaft can be fitted .

図５に示すように４７は２つのロックプレート４６を離間する方向に付勢する円弧状のロックスプリングで、両端部４７ａが略直角に折り曲げられて上記２つのロックプレート４６の後端部４６ｂと係合するとともに、図４に示すようにベースプレート３０の第２突出部３３ａの反対側凹部内に配置され、２つのロックプレート４６を互いに離間する方向へ付勢している。 As shown in FIG. 5, reference numeral 47 denotes an arc-shaped lock spring that urges the two lock plates 46 in a separating direction, and both end portions 47a are bent at a substantially right angle so that the rear end portions 46b of the two lock plates 46 and In addition to being engaged , as shown in FIG. 4, the base plate 30 is disposed in the concave portion on the opposite side of the second projecting portion 33a, and urges the two lock plates 46 away from each other.

上記ホルダーリング５０は内歯ギヤ２０の外周部２１の外周に覆うように固定された内歯ギヤ保持部５１と、この内歯ギヤ保持部５１の一端側を略階段状に延長して形成され、ベースプレート３０の外周部３１の軸方向への移動を阻止するベースプレート保持部５２とを有する。   The holder ring 50 is formed by extending an inner gear holding portion 51 fixed so as to cover the outer periphery of the outer peripheral portion 21 of the internal gear 20 and one end side of the internal gear holding portion 51 in a substantially step shape. And a base plate holding part 52 for preventing the outer peripheral part 31 of the base plate 30 from moving in the axial direction.

この装置機構部は、ベースプレート３０の円形突出部３３をシートクッション側取付アーム７０に固定すると共に、内歯ギヤ２０の外側突出部２３をシートバック側取付アーム６０に固定し、センターシャフト４１をモータユニットの駆動軸等で駆動する。外歯ギヤ１０の歯数は内歯ギア２０の歯数より1歯又は２歯少なく形成され、外歯ギア１０の歯部外径は内歯ギア２０の歯部外径より小さくなっているので、内歯２２と外歯１４を噛み合わせるには、内歯ギア２０と外歯ギア１０の中心を偏心して配置することになり、この偏心位置を円周方向にずらすことで、内歯２２と外歯１４の噛み合い位置がずれていき、噛み合い位置のずれが１回転すると内歯ギア２０と外歯ギア１０とが歯数差分だけ回転角度がずれる。 This device mechanism unit fixes the circular protrusion 33 of the base plate 30 to the seat cushion side mounting arm 70 , fixes the outer protrusion 23 of the internal gear 20 to the seat back side mounting arm 60, and fixes the center shaft 41 to the motor. It is driven by the drive shaft of the unit. The number of teeth of the external gear 10 is one or two less than the number of teeth of the internal gear 20, and the tooth outer diameter of the external gear 10 is smaller than the tooth outer diameter of the internal gear 20. In order to mesh the internal teeth 22 and the external teeth 14, the centers of the internal gear 20 and the external gear 10 are arranged eccentrically, and by shifting the eccentric position in the circumferential direction, When the meshing position of the external teeth 14 shifts and the meshing position shifts once, the rotation angle of the internal gear 20 and the external gear 10 is shifted by the difference in the number of teeth.

噛み合い位置の移動はセンターシャフト４１により駆動されるロックプレート４６の移動で行なわれる。すなわち、ロックプレート４６が内歯ギヤ２０のボス２５と外歯ギヤ１０の中心部に設けられたメタルベアリング１５との間に一対で配置され、ロックスプリング４７の両端部４７ａでロックプレート４６を食い込ませるように付勢されているので、内歯ギヤ２０の中心は外歯ギヤ１０の中心に対し偏心する。センターシャフト４１を駆動すると、一方の駆動突起４５で一方のロックプレート４６が駆動され移動すると共にロックスプリング４７を介して他方のロックプレート４６も駆動され移動する。 The meshing position is moved by moving the lock plate 46 driven by the center shaft 41. That is, a pair of lock plates 46 are disposed between the boss 25 of the internal gear 20 and the metal bearing 15 provided at the center of the external gear 10, and the lock plate 46 is bitten by both end portions 47 a of the lock spring 47. The center of the internal gear 20 is eccentric with respect to the center of the external gear 10. When the center shaft 41 is driven, one lock projection 46 is driven and moved by one drive protrusion 45, and the other lock plate 46 is also driven and moved via a lock spring 47.

この２つのロックプレート４６の移動により偏心位置が円周方向にずれていく。このずれにより内歯２２と外歯１４の噛み合いがずれていき、センターシャフト４１の１回転で内歯ギヤ２０は歯数差分だけ角度がずれる。よってセンターシャフト４１を回転させることにより、外歯ギヤ２０に固定されたシートバック側取付アーム６０の角度を調節することができる。 The eccentric position shifts in the circumferential direction by the movement of the two lock plates 46. Due to this shift, the meshing between the internal teeth 22 and the external teeth 14 shifts, and the internal gear 20 is shifted in angle by the difference in the number of teeth by one rotation of the center shaft 41. Therefore, by rotating the center shaft 41, the angle of the seat back side mounting arm 60 fixed to the external gear 20 can be adjusted.

センターシャフト４１が駆動されていないときの偏心量は、ロックスプリング４７により一対のロックプレート４６を内歯ギヤのボス２５と外歯ギヤ１０のメタルベアリング１５との間に食い込ませるように付勢しているので、偏心量が増加し外歯１４と内歯２２間のがたがなくなる。また、センターシャフト４１が駆動されたときには、駆動突起４５で一方のロックプレート４６を押すことで上記一方のロックプレート４６が食い込まない状態で偏心位置がずれていくので、駆動はスムーズに行われる。尚、フランジ４３のロックプレート係止部４４は、２つのロックプレート４６がベースプレート３０側に外れないようにロックプレート４６の側面を覆うように設けられている。 The amount of eccentricity when the center shaft 41 is not driven is urged by the lock spring 47 so that the pair of lock plates 46 are bitten between the boss 25 of the internal gear and the metal bearing 15 of the external gear 10. As a result, the amount of eccentricity increases, and rattling between the external teeth 14 and the internal teeth 22 is eliminated. Further, when the center shaft 41 is driven , the eccentric position is shifted in a state where the one lock plate 46 is not digging in by pushing the one lock plate 46 with the drive protrusion 45, so that the drive is performed smoothly. The lock plate locking portion 44 of the flange 43 is provided so as to cover the side surface of the lock plate 46 so that the two lock plates 46 do not come off to the base plate 30 side.

そして、リクライニング装置機構部分の組み立ては、内歯ギヤ２０の内歯２２に外歯ギヤ１０の外歯１４を噛み合わせるように、内歯ギヤ２０の円形凹部内に外歯ギヤ１０を配置し、次いで２つのロックプレート４６を内歯ギヤ２０のボス２５と外歯ギヤ１０のメタルベアリング１５との間の幅広側空間に配置する。次に、センターシャフト４１の駆動突起４５を内歯ギヤ２０のボス２５と外歯ギヤ１０のメタルベアリング１５との間の幅狭側空間に挿入するように、センターシャフト４１の軸４２をボス２５の内周面に挿入する。次に、ロックスプリング４７の両端部４７ａをフランジ４３の切り欠かれた位置でロックプレート４６の後端部４６ｂ間に挿入して組み付ける。 And the assembly of the reclining device mechanism portion is arranged such that the external gear 10 is disposed in the circular recess of the internal gear 20 so that the external teeth 14 of the external gear 10 mesh with the internal teeth 22 of the internal gear 20, Next, the two lock plates 46 are arranged in the wide side space between the boss 25 of the internal gear 20 and the metal bearing 15 of the external gear 10. Next, the shaft 42 of the center shaft 41 is inserted into the boss 25 so that the drive protrusion 45 of the center shaft 41 is inserted into the narrow side space between the boss 25 of the internal gear 20 and the metal bearing 15 of the external gear 10. Insert into the inner peripheral surface. Next, both end portions 47 a of the lock spring 47 are inserted and assembled between the rear end portions 46 b of the lock plate 46 at the positions where the flange 43 is notched .

そして、この状態でベースプレート３０を内歯ギヤ２０の円形凹部に被せるようにして、外歯ギヤ１０の外歯１４にベースプレート３０の内歯３８を圧入する。 In this state, the base plate 30 is put on the circular recess of the internal gear 20, and the internal teeth 38 of the base plate 30 are press-fitted into the external teeth 14 of the external gear 10.

この時、ベースプレート３０の内歯３８を、外歯ギヤ１０の外歯１４に圧入される歯型部３８Ａと、外歯ギヤ１０の外歯１４間に隙間を有して嵌合される歯型部３８Ｂとで構成しているため、ベースプレート３０の内歯３８を外歯ギヤ１０の外歯１４に圧入する際の圧入荷重を下げることができるとともに、回転方向のガタの発生を防止できる。また、略１２０度の間隔を置いて圧入される歯型部３８Ａを形成することで圧入の安定化と圧入荷重の低減及びガタの発生防止をバランス良く実現できる。 At this time, the tooth mold 38 </ b> A in which the internal teeth 38 of the base plate 30 are press-fitted into the external teeth 14 of the external gear 10 and the external teeth 14 of the external gear 10 are fitted with a gap. Since it is comprised by the part 38B, while being able to reduce the press-fit load at the time of press-fitting the internal teeth 38 of the base plate 30 into the external teeth 14 of the external gear 10, it is possible to prevent the occurrence of backlash in the rotational direction. Further, by forming the tooth mold portion 38A that is press-fitted at an interval of approximately 120 degrees, it is possible to achieve a good balance between press-fitting stabilization, press-fitting load reduction, and play prevention .

そして、最後にホルダーリング５０でベースプレート３０と内歯ギヤ２０の外周部分を保持して完成する。   Finally, the holder ring 50 holds the base plate 30 and the outer peripheral portion of the internal gear 20 to complete.

そして、大荷重入力時には、嵌合する全ての内歯３８で荷重を受けることができ、ベースプレート３０と外歯ギヤ１０の固定強度を強くできる。 When a large load is input, the load can be received by all the internal teeth 38 to be fitted, and the fixing strength of the base plate 30 and the external gear 10 can be increased.

この発明を実施した車両用シートリクライニング装置機構部の分解斜視図である。It is a disassembled perspective view of the vehicle seat reclining device mechanism part which implemented this invention. ラウンドタイプのリクライナーにおけるベースプレート側の外観図である。It is an external view by the side of the baseplate in a round type recliner. ベースプレートの部品内面図である。It is a component inner surface figure of a base plate. 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２からベースプレートを外した図である。It is the figure which removed the base plate from FIG. ベースプレートの歯型部に係合する外歯ギヤの係合状態を示す平面図である。It is a top view which shows the engagement state of the external gear which engages with the tooth-type part of a baseplate.

１０…外歯ギヤ
１３…側面
１４…外歯
２０…内歯ギヤ
２２…内歯ギヤの内歯
２３…外側突出部
３０…ベースプレート
３３…円形突出部
３３ａ…第２突出部
３４…エンボス
３６…凸部
３８…ベースプレートの内歯
３８Ａ…圧入される歯型部
３８Ｂ…隙間を有して嵌合される歯型部
３８Ｃ…無歯部
３９…底面
４０…偏心駆動手段
４１…センターシャフト
４６…ロックプレート
４７…ロックスプリング
５０…ホルダーリング
６０…シートバック側取付アーム
７０…シートクッション側取付アーム
７１…取付孔 DESCRIPTION OF SYMBOLS 10 ... External gear 13 ... Side 14 ... External tooth 20 ... Internal gear
22 ... Internal teeth of internal gear
23 ... Outer protrusion 30 ... Base plate
33 ... Circular protrusion
33a ... 2nd protrusion part
34 ... Emboss 36 ... Convex
38 ... Inner teeth 38A of the base plate ... Tooth mold part 38B to be press-fitted ... Tooth mold part fitted with a gap
38C ... toothless part
39 ... Bottom 40 ... Eccentric drive means 41 ... Center shaft 46 ... Lock plate 47 ... Lock spring 50 ... Holder ring 60 ... Seat back side mounting arm 70 ... Seat cushion side mounting arm
71 ... Mounting hole

Claims (3)

円板を半抜きして円形凹部とシートクッション側取付アームに固定するための円形突出部とを形成したベースプレートと、円板を半抜きして円形凹部とシートバック側取付アームに固定するための外側突出部とを形成し該円形凹部の内周面に内歯を形成した内歯ギヤと、前記ベースプレートに固定されるとともに前記内歯ギヤの内歯より歯数が１歯又は２歯少ない外歯を有する外歯ギヤと、前記内歯ギヤを偏心駆動する偏心駆動手段と、前記内歯ギヤ、前記外歯ギヤ及び前記ベースプレートを重ね合わせてその外周部を挟むように支持するホルダーリングとを備えたシートリクライニング装置において、
前記ベースプレートには前記円形突出部に略六角形状の第２突出部を形成し、該第２突出部の略六角形状の頂点の部分に、前記シートクッション側取付アームの取付孔に嵌合するエンボスを形成し、
前記ベースプレートの前記円形凹部の内周面には、前記外歯ギヤの外歯と嵌合する複数の内歯を形成するとともに、前記エンボスと対応する位置に内歯の形成されない無歯部を設け、前記ベースプレートの前記内歯は、少なくとも円周方向へ所定の間隔で形成されている前記外歯ギヤの歯部間に圧入される歯型部と、前記外歯ギヤの歯部間に隙間を有して嵌合される歯型部とで構成し、
前記内歯ギヤの前記円形凹部に前記外歯ギヤと前記偏心駆動手段とを配置した状態で、前記ベースプレートの前記内歯を前記外歯ギヤの外歯に嵌合させたことを特徴とする車両用シートリクライニング装置。 A base plate formed with a circular recess and a circular protrusion for fixing to the seat cushion side mounting arm by half-cutting the disc, and a base plate for half-drawing and fixing to the circular recess and the seat back side mounting arm a gear inner forming internal teeth forming the outer protrusions on the inner peripheral surface of the circular recess, the inner teeth than the inner teeth one tooth or two teeth fewer external tooth gear is fixed to the base plate and external gear having teeth, an eccentric drive means for eccentrically driving the internal gear, said internal gear, and a holder ring which supports so as to sandwich the outer peripheral part by superimposing said external gear and said base plate In the seat reclining device provided,
The base plate has a substantially hexagonal second protrusion formed on the circular protrusion, and an emboss that fits into a mounting hole of the seat cushion side mounting arm at a substantially hexagonal apex portion of the second protrusion. Form the
The inner peripheral surface of the circular recess of the base plate, thereby forming a plurality of internal teeth of the external teeth mate with the external gear, provided no teeth are not formed of the inner teeth in a position corresponding to the embossing The internal teeth of the base plate have a gap between a tooth mold portion press-fitted between the tooth portions of the external gear and at least a predetermined interval in the circumferential direction, and a tooth portion of the external gear. constituted by the tooth-shaped portion which is fitted with a,
A vehicle characterized in that the internal teeth of the base plate are fitted to the external teeth of the external gear in a state where the external gear and the eccentric drive means are arranged in the circular recess of the internal gear. Seat reclining device. 前記外歯ギヤは、前記内歯ギヤの前記円形凹部の深さと前記ベースプレートの前記円形凹部の深さとを加算した幅よりも少し薄い厚さに形成され、前記ベースプレートの前記円形凹部の底面には前記外歯ギヤに向けて突出して前記外歯ギヤの側面に接触可能な凸部が形成されていることを特徴とする請求項１に記載の車両用シートリクライニング装置。 The external gear is formed to have a thickness slightly smaller than the width obtained by adding the depth of the circular recess of the internal gear and the depth of the circular recess of the base plate, and the bottom surface of the circular recess of the base plate The vehicle seat reclining device according to claim 1, wherein a convex portion that protrudes toward the external gear and contacts with a side surface of the external gear is formed. 前記圧入する歯型部は前記外歯ギヤの少なくとも円周方向へ略１２０度の間隔で３箇所に形成されていることを特徴とする請求項１または２に記載の車両用シートリクライニング装置。 At least the vehicle seat reclining device according to claim 1 or 2, characterized in that it is formed in three places at intervals of approximately 120 degrees in the circumferential direction of the outer tooth gear tooth form portion of the press-fitting.
JP2005168949A 2005-06-09 2005-06-09 Vehicle seat reclining device Expired - Fee Related JP4778733B2 (en)

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JP2005168949A JP4778733B2 (en) 2005-06-09 2005-06-09 Vehicle seat reclining device
EP06011514A EP1731353B1 (en) 2005-06-09 2006-06-02 Seat reclining apparatus
US11/448,732 US7354108B2 (en) 2005-06-09 2006-06-08 Seat reclining apparatus
CNB2006100916723A CN100518584C (en) 2005-06-09 2006-06-09 Seat reclining apparatus

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