JP2006327405A - Power seat for vehicle - Google Patents

Power seat for vehicle Download PDF

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Publication number
JP2006327405A
JP2006327405A JP2005153955A JP2005153955A JP2006327405A JP 2006327405 A JP2006327405 A JP 2006327405A JP 2005153955 A JP2005153955 A JP 2005153955A JP 2005153955 A JP2005153955 A JP 2005153955A JP 2006327405 A JP2006327405 A JP 2006327405A
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shaft
sleeve
peripheral surface
flexible shaft
flexible
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JP2005153955A
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Japanese (ja)
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Genta Moriyama
玄太 森山
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Aisin Corp
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Aisin Seiki Co Ltd
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Priority to JP2005153955A priority Critical patent/JP2006327405A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To improve silence in a car by strengthening the fixation of a rotary shaft (a rotary shaft on the driven side or a rotary shaft on the drive side ) and a flexible shaft by a sleeve. <P>SOLUTION: A power seat for a vehicle is provided with the sleeve 5 which is arranged on the periphery of the part where an engagement shaft part 4b and a first engagement groove part 3b are engaged with each other, and which fixes the outer shape of the rotary shaft 3a on the driven side and the outer shape of the flexible shaft 4. The engagement shaft part 4b is formed by forming the outer peripheral surface of the flexible shaft 4 in a square form, and the first engagement groove part 3b is formed by forming the inner peripheral surface of the rotary shaft 3a on the driven side in a square form. The inner peripheral surface of the sleeve 5 is brought into pressure contact with both the outer peripheral surface of the rotary shaft 3a on the driven side and the outer peripheral surface of the flexible shaft 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、駆動側回転軸の動力をフレキシブルシャフトを介して従動側回転軸に伝達する動力伝達装置を有する車両用パワーシートに関し、特に、車内の静粛性の向上を図ることができる車両用パワーシートに関する。   The present invention relates to a vehicle power seat having a power transmission device that transmits power of a drive-side rotating shaft to a driven-side rotating shaft via a flexible shaft, and in particular, power for a vehicle that can improve quietness in the vehicle. Regarding the sheet.

駆動側回転軸（出力軸）の動力をフレキシブルシャフトを介して従動側回転軸（入力軸）に伝達する動力伝達装置は、フレキシブルシャフトが撓むことで駆動側回転軸と従動側回転軸の中心軸が一致しなくても駆動側回転軸の動力を従動側回転軸に伝達することができ、例えば、パワーシートにおける減速機構とモータの間の動力伝達経路にて用いられる（例えば、特許文献１参照）。このような動力伝達装置では、駆動側回転軸および従動側回転軸の端部には内周に多角形状（例えば、四角形、六角形）の孔が形成された係合溝部を有し、フレキシブルシャフトの両端には外周が多角形（例えば、四角形状、六角形状）に形成された係合軸部を有する。駆動側回転軸の係合溝部はフレキシブルシャフトの一方の係合軸部と嵌合し、従動側回転軸の係合溝部はフレキシブルシャフトの他方の係合軸部と嵌合する。このように嵌合した状態で駆動側回転軸の動力がフレキシブルシャフトを介して従動側回転軸に伝達される。   The power transmission device that transmits the power of the drive-side rotating shaft (output shaft) to the driven-side rotating shaft (input shaft) via the flexible shaft is the center of the driving-side rotating shaft and the driven-side rotating shaft by bending the flexible shaft. Even if the axes do not coincide with each other, the power of the drive side rotary shaft can be transmitted to the driven side rotary shaft, and is used, for example, in a power transmission path between the speed reduction mechanism in the power seat and the motor (for example, Patent Document 1). reference). In such a power transmission device, the end of each of the drive side driven shaft and the driven side rotary shaft has an engaging groove portion formed with a polygonal (for example, quadrangular, hexagonal) hole on the inner periphery, and a flexible shaft. At both ends, there are engaging shaft portions whose outer periphery is formed in a polygonal shape (for example, a square shape or a hexagonal shape). The engagement groove portion of the drive side rotation shaft is fitted with one engagement shaft portion of the flexible shaft, and the engagement groove portion of the driven side rotation shaft is fitted with the other engagement shaft portion of the flexible shaft. In this state, the power of the drive side rotary shaft is transmitted to the driven side rotary shaft via the flexible shaft.

実公平７−７２１６号公報No. 7-7216

駆動側回転軸および従動側回転軸の係合溝部の内周面と、フレキシブルシャフトの係合軸部の外周面とは、各々が成形誤差を有しており、実際の嵌合においては、隙間（ガタ）が発生する。従動側回転軸と駆動側回転軸の中心軸にズレがあると、フレキシブルシャフトの湾曲によって、フレキシブルシャフトの係合軸部が駆動側回転軸および従動側回転軸の係合溝部内で傾いた状態で付勢され、例えば、半回転後には逆方向へ付勢される。その結果、フレキシブルシャフトは１回転毎に駆動側回転軸および従動側回転軸の係合溝部内を隙間分だけ移動と接触（当たり）を繰り返し、係合軸部と係合溝部の間で音が発生し、この音は乗員に不快感を与える。特に、モータとフレキシブルシャフトが直接接続していて、モータが高速回転（例えば、３０００ｒｐｍ）の時には音の発生が著しい。さらに、使用してゆくうちに係合軸部と係合溝部の間の摩耗によって隙間（ガタ）が大きくなり、音の発生が著しくなる。   The inner peripheral surface of the engaging groove portion of the driving side rotating shaft and the driven side rotating shaft and the outer peripheral surface of the engaging shaft portion of the flexible shaft each have a molding error. (Backlash) occurs. When the center axis of the driven-side rotary shaft and the drive-side rotary shaft is misaligned, the flexible shaft is tilted in the engagement groove of the drive-side rotary shaft and the driven-side rotary shaft due to the bending of the flexible shaft For example, after half rotation, it is biased in the reverse direction. As a result, the flexible shaft repeatedly moves and contacts (contacts) within the engagement groove portions of the drive-side rotation shaft and the driven-side rotation shaft every rotation, and sound is generated between the engagement shaft portion and the engagement groove portion. This sound is uncomfortable for the passenger. In particular, when the motor and the flexible shaft are directly connected and the motor rotates at a high speed (for example, 3000 rpm), the generation of sound is remarkable. In addition, the gap between the engagement shaft portion and the engagement groove portion increases with use and the generation of noise becomes significant.

本発明の主な課題は、車内の静粛性の向上を図ることである。   The main object of the present invention is to improve the quietness in a vehicle.

本発明の第１の視点においては、駆動側回転軸および従動側回転軸と、前記駆動側回転軸の回転トルクを前記従動側回転軸に伝達するフレキシブルシャフトと、前記フレキシブルシャフトの一端の外周面が角形状に形成された第１係合軸部と、前記駆動側回転軸および前記従動側回転軸のうち一方の回転軸の先端に形成され、かつ、内周面が前記第１係合軸部と軸回転方向に係合する角形状に形成された第１係合溝部と、を備え、前記第１係合軸部と前記第１係合溝部の係合部分にて前記一方の回転軸と前記フレキシブルシャフトとの動力伝達経路を構成した動力伝達装置を有する車両用パワーシートにおいて、前記一方の回転軸と前記フレキシブルシャフトが係合された部分の周囲に配されるとともに、前記一方の回転軸の外形、及び前記フレキシブルシャフトの外形を固定するスリーブを備え、前記スリーブの内周面は、前記一方の回転軸の外周面、及び前記フレキシブルシャフトの外周面のそれぞれと圧接することを特徴とする。   In a first aspect of the present invention, a driving-side rotating shaft and a driven-side rotating shaft, a flexible shaft that transmits a rotational torque of the driving-side rotating shaft to the driven-side rotating shaft, and an outer peripheral surface of one end of the flexible shaft Is formed at the tip of one of the first engaging shaft portion formed in a square shape, the driving side rotating shaft and the driven side rotating shaft, and the inner peripheral surface thereof is the first engaging shaft. And a first engagement groove formed in a rectangular shape that engages in the shaft rotation direction, and the one rotation shaft at the engagement portion of the first engagement shaft and the first engagement groove In the vehicle power seat having a power transmission device that constitutes a power transmission path between the flexible shaft and the flexible shaft, the rotary shaft is disposed around a portion where the one rotary shaft and the flexible shaft are engaged, and the one rotation The outer shape of the shaft, and said Comprises a sleeve for fixing the outer shape of the lexical table shaft, the inner peripheral surface of the sleeve, characterized by each pressure contact of the outer peripheral surface of the outer peripheral surface, and the flexible shaft of the one rotary shaft.

本発明の前記車両用パワーシートにおいて、前記一方の回転軸及び前記フレキシブルシャフトは、前記スリーブの内周に圧入されていることが好ましい。   In the vehicle power seat of the present invention, it is preferable that the one rotating shaft and the flexible shaft are press-fitted into an inner periphery of the sleeve.

本発明の前記車両用パワーシートにおいて、前記スリーブは、内周面に複数の突起を有し、前記突起の頂点と中心軸との距離は、前記スリーブと前記一方の回転軸又は前記フレキシブルシャフトとが接続する前において前記一方の回転軸又は前記フレキシブルシャフトの半径よりも小さく設定されていることが好ましい。   In the vehicle power seat of the present invention, the sleeve has a plurality of protrusions on an inner peripheral surface, and the distance between the apex of the protrusion and the central axis is the sleeve and the one rotation shaft or the flexible shaft. Is preferably set smaller than the radius of the one rotating shaft or the flexible shaft before connection.

本発明の前記車両用パワーシートにおいて、前記スリーブの断面形状は、多角形に形成され、前記多角形の面と中心軸との最短距離が、前記スリーブと前記一方の回転軸又は前記フレキシブルシャフトと接続する前において前記一方の回転軸又は前記フレキシブルシャフトの半径よりも小さく設定されていてもよい。   In the vehicle power seat of the present invention, the sleeve has a polygonal cross-sectional shape, and the shortest distance between the polygonal surface and the central axis is the sleeve and the one rotating shaft or the flexible shaft. Before connection, it may be set smaller than the radius of the one rotary shaft or the flexible shaft.

本発明の前記車両用パワーシートにおいて、前記スリーブは、複数のスリットが形成され、前記スリット間の部位が内周側に絞られていてもよい。   In the vehicle power seat of the present invention, the sleeve may be formed with a plurality of slits, and a portion between the slits may be narrowed to the inner peripheral side.

本発明の前記車両用パワーシートにおいて、前記フレキシブルシャフトの他端の外周面を角形状に形成してなる第２係合軸部と、前記駆動側回転軸および前記従動側回転軸のうち他方の回転軸の先端に形成され、かつ、挿入される前記第２係合軸部と軸回転方向に係合する角形状に内周面が形成された第２係合溝部と、前記他方の回転軸と前記フレキシブルシャフトが係合された部分の周囲に配されるとともに、前記他方の回転軸の外形、及び前記フレキシブルシャフトの外形を固定する第２のスリーブと、を備え、前記第２のスリーブの内周面は、前記他方の回転軸の外周面、及び前記フレキシブルシャフトの外周面のそれぞれと圧接することが好ましい。   In the vehicle power seat according to the present invention, the second engaging shaft portion formed by forming the outer peripheral surface of the other end of the flexible shaft into a square shape, and the other of the driving side rotating shaft and the driven side rotating shaft. A second engagement groove formed at an end of the rotation shaft and having an inner peripheral surface formed in an angular shape that engages with the inserted second engagement shaft in the axial rotation direction; and the other rotation shaft And a second sleeve for fixing the outer shape of the other rotating shaft and the outer shape of the flexible shaft, and arranged around a portion where the flexible shaft is engaged. The inner peripheral surface is preferably in pressure contact with each of the outer peripheral surface of the other rotating shaft and the outer peripheral surface of the flexible shaft.

本発明（請求項１−６）によれば、スリーブにより回転軸（従動側回転軸又は駆動側回転軸）とフレキシブルシャフトの固定が強化されるため、従動側回転軸又は駆動側回転軸の係合溝部とフレキシブルシャフトの係合軸部に隙間（ガタ）が生じても、フレキシブルシャフトは係合溝部の一方へ付勢されることがなくなり、係合軸部が係合溝部内を移動・接触を繰り返すこともなく、音を発しない。よって、車内の静粛性が向上する。   According to the present invention (Claim 1-6), since the fixing of the rotary shaft (the driven side rotary shaft or the drive side rotary shaft) and the flexible shaft is reinforced by the sleeve, the engagement between the driven side rotary shaft or the drive side rotary shaft is enhanced. Even if a gap (backlash) occurs between the joint groove portion and the engagement shaft portion of the flexible shaft, the flexible shaft is not urged to one side of the engagement groove portion, and the engagement shaft portion moves and contacts within the engagement groove portion. No sound is emitted without repeating. Therefore, quietness in the vehicle is improved.

（実施形態１）
本発明の実施形態１に係る車両用パワーシートについて図面を用いて説明する。図１は、本発明の実施形態１に係る車両用パワーシートの一例を模式的に示した斜視図である。図２は、本発明の実施形態１に係る車両用パワーシートの動力伝達装置およびその周辺の構成を模式的に示した正面図（図１の矢印Ａ方向から見たときの図）である。図３は、本発明の実施形態１に係る車両用パワーシートの動力伝達装置およびその周辺の構成を模式的に示した部分拡大断面図（軸方向の断面図）である。図４は、本発明の実施形態１に係る車両用パワーシートの動力伝達装置の構成を模式的に示した分解斜視図である。図５は、本発明の実施形態１に係る車両用パワーシートの動力伝達装置の構成を模式的に示した断面図（図３のＸ−Ｘ´間の断面図；減速機およびチューブ部材を除く）である。 (Embodiment 1)
A vehicle power seat according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing an example of a vehicle power seat according to Embodiment 1 of the present invention. FIG. 2 is a front view (viewed from the direction of arrow A in FIG. 1) schematically showing the power transmission device for a vehicle power seat according to Embodiment 1 of the present invention and the surrounding configuration. FIG. 3 is a partial enlarged cross-sectional view (a cross-sectional view in the axial direction) schematically showing the configuration of the power transmission device for a vehicle power seat and its periphery according to Embodiment 1 of the present invention. FIG. 4 is an exploded perspective view schematically showing the configuration of the power transmission device for a vehicle power seat according to the first embodiment of the present invention. 5 is a cross-sectional view schematically showing the configuration of the power transmission device for a vehicle power seat according to the first embodiment of the present invention (cross-sectional view taken along line XX ′ in FIG. 3; excluding the speed reducer and the tube member). ).

動力伝達装置１ａは、車両用パワーシート１に適用したものである（図１参照）。車両用パワーシート１以外にも電動ベッド、介護装置などにも適用することができる。動力伝達装置１ａは、モータ２と、減速機３と、フレキシブルシャフト４と、スリーブ５と、チューブ部材６と、を有する（図２、３参照）。   The power transmission device 1a is applied to the vehicle power seat 1 (see FIG. 1). In addition to the vehicle power seat 1, the present invention can also be applied to an electric bed, a care device, and the like. The power transmission device 1a includes a motor 2, a speed reducer 3, a flexible shaft 4, a sleeve 5, and a tube member 6 (see FIGS. 2 and 3).

モータ２は、減速機３に動力を与える駆動装置であり、車両用パワーシート１のスライドレール１ｂに固定されたブラケット１ｃに取り付けられている。モータ２の回転軸である駆動側回転軸２ａの端部には、フレキシブルシャフト４の係合軸部４ａと軸回転方向に係合させるための係合溝部２ｂが形成されている。係合溝部２ｂは、内周に多角形状（図３では四角形状）の溝が形成されており、フレキシブルシャフト４の係合軸部４ａと係合する。   The motor 2 is a drive device that supplies power to the speed reducer 3, and is attached to a bracket 1 c that is fixed to the slide rail 1 b of the vehicle power seat 1. An engagement groove 2b for engaging with the engagement shaft 4a of the flexible shaft 4 in the shaft rotation direction is formed at the end of the drive side rotation shaft 2a, which is the rotation shaft of the motor 2. The engagement groove portion 2 b is formed with a polygonal (quadrangle in FIG. 3) groove on the inner periphery, and engages with the engagement shaft portion 4 a of the flexible shaft 4.

減速機３は、モータ２の回転を減速する機構であり、車両用パワーシート１のスライドレール１ｂに取り付けられている。減速機３が回転することで、スライドレール１ｂがガイドレール１ｄに沿ってスライドする。減速機３は、モータ２の動力を受ける従動側回転軸３ａを有する。従動側回転軸３ａの端部には、フレキシブルシャフト４の係合軸部４ｂと軸回転方向に係合させるための係合溝部３ｂが形成されている。係合溝部３ｂは、内周に多角形状（図３では四角形状）の溝が形成されており、フレキシブルシャフト４の係合軸部４ｂと係合する。   The speed reducer 3 is a mechanism that decelerates the rotation of the motor 2, and is attached to the slide rail 1 b of the vehicle power seat 1. As the speed reducer 3 rotates, the slide rail 1b slides along the guide rail 1d. The speed reducer 3 has a driven side rotating shaft 3 a that receives the power of the motor 2. At the end of the driven side rotation shaft 3a, an engagement groove portion 3b for engaging with the engagement shaft portion 4b of the flexible shaft 4 in the axial rotation direction is formed. The engagement groove portion 3 b is formed with a polygonal (quadrangle in FIG. 3) groove on the inner periphery, and engages with the engagement shaft portion 4 b of the flexible shaft 4.

フレキシブルシャフト４は、フレキシブルな材料よりなるシャフトであり、モータ２の駆動側回転軸２ａの回転動力を減速機３の従動側回転軸３ａに伝達する。フレキシブルシャフト４は、組立により駆動側回転軸２ａおよび従動側回転軸３ａの中心軸が一致しないときであっても、湾曲することで中心軸のズレを吸収する。フレキシブルシャフト４の胴体部４ｃの両端部には、係合軸部４ａ、４ｂが形成されている。係合軸部４ａは、外周が多角形状（図３では四角形状）に形成されており、モータ２の係合溝部２ｂと軸回転方向に係合する。係合軸部４ｂは外周が多角形（図３では四角形）に形成されており、減速機３の係合溝部３ｂと嵌合する。   The flexible shaft 4 is a shaft made of a flexible material, and transmits the rotational power of the driving side rotating shaft 2 a of the motor 2 to the driven side rotating shaft 3 a of the speed reducer 3. The flexible shaft 4 absorbs the deviation of the central axis by being bent even when the central axes of the drive-side rotary shaft 2a and the driven-side rotary shaft 3a do not match due to assembly. Engagement shaft portions 4 a and 4 b are formed at both ends of the body portion 4 c of the flexible shaft 4. The engagement shaft portion 4a has an outer periphery formed in a polygonal shape (square shape in FIG. 3), and engages with the engagement groove portion 2b of the motor 2 in the shaft rotation direction. The outer periphery of the engagement shaft portion 4 b is formed in a polygonal shape (quadrangle in FIG. 3), and is engaged with the engagement groove portion 3 b of the speed reducer 3.

スリーブ５は、減速機３とフレキシブルシャフト４の係合部分の固定を強化するための補助部材であり、減速機３の係合溝部３ｂとフレキシブルシャフト４の係合軸部４ｂの係合部分の周囲に配され、従動側回転軸３ａ及び胴体部４ｃの外周面と圧接（圧嵌）する。なお、スリーブ５は、減速機３とフレキシブルシャフト４の係合部分を固定するためだけでなく、モータ２とフレキシブルシャフト４の係合部分を固定するために用いてもよい。スリーブ５は、従動側回転軸３ａ及び胴体部４ｃの外周面と圧接するために、内面に複数の突起部５ａが形成されている（図５参照）。突起部５ａの頂点と中心軸との距離は、スリーブ５と減速機３又はフレキシブルシャフト４と接続する前において従動側回転軸３ａ及び胴体部４ｃの半径よりも小さく設定しておく。これにより、従動側回転軸３ａ又は胴体部４ｃをスリーブ５に圧入したときに、従動側回転軸３ａ又は胴体部４ｃとスリーブ５が圧接する。なお、スリーブ５は、突起部５ａが形成されたものに限らず、多角形（例えば、六角計）に形成されたものでもよい（図６参照）。この場合、多角形の面と中心軸との最短距離が、スリーブ５と減速機３又はフレキシブルシャフト４と接続する前において従動側回転軸３ａ及び胴体部４ｃの半径よりも小さく設定しておく。さらに、スリーブ５は、複数のスリット５ｂを形成し、スリット５ｂ間の部位を内周側に絞ったものを用いてもよい（図７参照）。   The sleeve 5 is an auxiliary member for strengthening the fixing of the engaging portion between the speed reducer 3 and the flexible shaft 4. The sleeve 5 is an engaging portion between the engaging groove portion 3 b of the speed reducer 3 and the engaging shaft portion 4 b of the flexible shaft 4. It arrange | positions around and press-contacts with the outer peripheral surface of the driven side rotating shaft 3a and the trunk | drum 4c (press fitting). The sleeve 5 may be used not only to fix the engaging portion between the speed reducer 3 and the flexible shaft 4 but also to fix the engaging portion between the motor 2 and the flexible shaft 4. The sleeve 5 is formed with a plurality of protrusions 5a on the inner surface so as to be in pressure contact with the driven-side rotating shaft 3a and the outer peripheral surface of the body portion 4c (see FIG. 5). The distance between the apex of the protrusion 5a and the central axis is set to be smaller than the radii of the driven side rotation shaft 3a and the body 4c before connecting the sleeve 5 to the speed reducer 3 or the flexible shaft 4. Thereby, when the driven side rotating shaft 3a or the body part 4c is press-fitted into the sleeve 5, the driven side rotating shaft 3a or the body part 4c and the sleeve 5 are pressed. The sleeve 5 is not limited to the one having the protrusions 5a, but may be a polygon (for example, a hexagon) (see FIG. 6). In this case, the shortest distance between the polygonal surface and the central axis is set to be smaller than the radius of the driven side rotating shaft 3a and the body portion 4c before connecting the sleeve 5 to the speed reducer 3 or the flexible shaft 4. Further, the sleeve 5 may be formed by forming a plurality of slits 5b and narrowing a portion between the slits 5b to the inner peripheral side (see FIG. 7).

チューブ部材６は、フレキシブルシャフト４及びスリーブ５を保護する部材であり、両端部がモータ２と減速機３に支持され、フレキシブルシャフト４及びスリーブ５の外周にて、フレキシブルシャフト４及びスリーブ５と所定の間隔をおいて配される。   The tube member 6 is a member that protects the flexible shaft 4 and the sleeve 5. Both ends of the tube member 6 are supported by the motor 2 and the speed reducer 3, and the flexible shaft 4 and the sleeve 5 are arranged on the outer periphery of the flexible shaft 4 and the sleeve 5. It is arranged at intervals.

実施形態１によれば、スリーブ５により従動側回転軸３ａ（又は駆動側回転軸２ａ）とフレキシブルシャフト４が固定されるため、従動側回転軸３ａ（又は駆動側回転軸２ａ）の係合溝部３ｂ（又は係合溝部２ｂ）とフレキシブルシャフト４の係合軸部４ｂ（又は４ａ）に隙間（ガタ）が生じてもフレキシブルシャフト４は係合溝部３ｂ（又は係合溝部２ｂ）の一方へ付勢されることはない。従って、係合軸部４ｂ（又は４ａ）が係合溝部３ｂ（又は係合溝部２ｂ）内を移動・接触を繰り返すこともなく、音を発しない。なお、伝達トルクが大きく（例えばロック時）、スリーブ５による圧力が回転方向の摩擦力を超えた場合、フレキシブルシャフト４は係合溝部３ｂ（又は係合溝部２ｂ）内をトルク伝達方向へガタがなくなるまで移動（回転）し、係合溝部３ｂ（又は係合溝部２ｂ）と接触することもありうるが、この場合は一方向へ回転する毎に１回発生するだけであり、定常的（１回転毎に１回）に音を発することはなく、乗員へ不快感を与えることはない。よって、車内の静粛性が向上する。   According to the first embodiment, the driven-side rotating shaft 3a (or the driving-side rotating shaft 2a) and the flexible shaft 4 are fixed by the sleeve 5, and therefore the engaging groove portion of the driven-side rotating shaft 3a (or the driving-side rotating shaft 2a). The flexible shaft 4 is attached to one of the engagement groove 3b (or the engagement groove 2b) even if a gap (backlash) occurs between the engagement shaft 3b (or the engagement groove 2b) and the engagement shaft 4b (or 4a) of the flexible shaft 4. There is no power. Accordingly, the engagement shaft portion 4b (or 4a) does not repeat movement and contact within the engagement groove portion 3b (or engagement groove portion 2b), and no sound is generated. When the transmission torque is large (for example, when locked) and the pressure by the sleeve 5 exceeds the frictional force in the rotational direction, the flexible shaft 4 has a backlash in the torque transmission direction in the engagement groove portion 3b (or the engagement groove portion 2b). It may move (rotate) until it disappears, and may come into contact with the engagement groove 3b (or engagement groove 2b), but in this case, it only occurs once every time it rotates in one direction, and is constant (1 No sound is generated once per revolution), and no discomfort is given to the occupant. Therefore, quietness in the vehicle is improved.

本発明の実施形態１に係る車両用パワーシートの一例を模式的に示した斜視図である。It is the perspective view which showed typically an example of the power seat for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る車両用パワーシートの動力伝達装置およびその周辺の構成を模式的に示した正面図（図１の矢印Ａ方向から見たときの図）である。It is the front view (figure when it sees from the arrow A direction of FIG. 1) which showed typically the power transmission device of the power seat for vehicles which concerns on Embodiment 1 of this invention, and the structure of the periphery. 本発明の実施形態１に係る車両用パワーシートの動力伝達装置およびその周辺の構成を模式的に示した部分拡大断面図（軸方向の断面図）である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially enlarged cross-sectional view (axial cross-sectional view) schematically showing a configuration of a power transmission device for a vehicle power seat according to Embodiment 1 of the present invention and its surroundings. 本発明の実施形態１に係る車両用パワーシートの動力伝達装置の構成を模式的に示した分解斜視図である。It is the disassembled perspective view which showed typically the structure of the power transmission device of the power seat for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る車両用パワーシートの動力伝達装置の構成を模式的に示した断面図（図３のＸ−Ｘ´間の断面図；減速機およびチューブ部材を除く）である。It is sectional drawing (sectional drawing between XX 'of FIG. 3; except a reduction gear and a tube member) which showed typically the structure of the power transmission device of the power seat for vehicles which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る車両用パワーシートの動力伝達装置の変形例１の構成を模式的に示した断面図（図３のＸ−Ｘ´間の断面図；減速機およびチューブ部材を除く）である。Sectional drawing (cross-sectional view between XX 'of FIG. 3; except for the speed reducer and the tube member) schematically showing the configuration of Modification 1 of the power transmission device for a vehicle power seat according to the first embodiment of the present invention. ). 本発明の実施形態１に係る車両用パワーシートの動力伝達装置の変形例２の構成を模式的に示した分解斜視図である。It is the disassembled perspective view which showed typically the structure of the modification 2 of the power transmission device of the power seat for vehicles which concerns on Embodiment 1 of this invention.

符号の説明Explanation of symbols

１ 車両用パワーシート
１ａ 動力伝達装置
１ｂ スライドレール
１ｃ ブラケット
１ｄ ガイドレール
２ モータ
２ａ 駆動側回転軸（出力軸）
２ｂ 係合溝部
３ 減速機
３ａ 従動側回転軸（入力軸）
３ｂ 係合溝部
４ フレキシブルシャフト
４ａ、４ｂ 係合軸部
４ｃ 胴体部
５ スリーブ
５ａ 突起部
５ｂ スリット
６ チューブ部材 DESCRIPTION OF SYMBOLS 1 Power seat for vehicles 1a Power transmission device 1b Slide rail 1c Bracket 1d Guide rail 2 Motor 2a Drive side rotating shaft (output shaft)
2b Engaging groove 3 Reducer 3a Driven side rotating shaft (input shaft)
3b Engaging groove 4 Flexible shaft 4a, 4b Engaging shaft 4c Body 5 Sleeve 5a Protruding 5b Slit 6 Tube member

Claims (6)

駆動側回転軸および従動側回転軸と、
前記駆動側回転軸の回転トルクを前記従動側回転軸に伝達するフレキシブルシャフトと、
前記フレキシブルシャフトの一端の外周面が角形状に形成された第１係合軸部と、
前記駆動側回転軸および前記従動側回転軸のうち一方の回転軸の先端に形成され、かつ、内周面が前記第１係合軸部と軸回転方向に係合する角形状に形成された第１係合溝部と、
を備え、
前記第１係合軸部と前記第１係合溝部の係合部分にて前記一方の回転軸と前記フレキシブルシャフトとの動力伝達経路を構成した動力伝達装置を有する車両用パワーシートにおいて、
前記一方の回転軸と前記フレキシブルシャフトが係合された部分の周囲に配されるとともに、前記一方の回転軸の外形、及び前記フレキシブルシャフトの外形を固定するスリーブを備え、
前記スリーブの内周面は、前記一方の回転軸の外周面、及び前記フレキシブルシャフトの外周面のそれぞれと圧接することを特徴とする車両用パワーシート。 A driving side rotating shaft and a driven side rotating shaft;
A flexible shaft for transmitting the rotational torque of the drive side rotary shaft to the driven side rotary shaft;
A first engagement shaft portion in which an outer peripheral surface of one end of the flexible shaft is formed in a square shape;
It is formed at the tip of one of the drive-side rotary shaft and the driven-side rotary shaft, and the inner peripheral surface is formed in an angular shape that engages with the first engagement shaft portion in the axial rotation direction. A first engagement groove,
With
In a vehicle power seat having a power transmission device that configures a power transmission path between the one rotary shaft and the flexible shaft at an engagement portion of the first engagement shaft portion and the first engagement groove portion,
The one rotation shaft and the flexible shaft are arranged around the engaged portion, and include an outer shape of the one rotation shaft and a sleeve for fixing the outer shape of the flexible shaft,
An inner peripheral surface of the sleeve is in pressure contact with each of an outer peripheral surface of the one rotating shaft and an outer peripheral surface of the flexible shaft. 前記一方の回転軸及び前記フレキシブルシャフトは、前記スリーブの内周に圧入されていることを特徴とする請求項１記載の車両用パワーシート。   The vehicle power seat according to claim 1, wherein the one rotating shaft and the flexible shaft are press-fitted into an inner periphery of the sleeve. 前記スリーブは、内周面に複数の突起を有し、前記突起の頂点と中心軸との距離は、前記スリーブと前記一方の回転軸又は前記フレキシブルシャフトとが接続する前において前記一方の回転軸又は前記フレキシブルシャフトの半径よりも小さく設定されていることを特徴とする請求項１又は２記載の車両用パワーシート。   The sleeve has a plurality of protrusions on an inner peripheral surface, and the distance between the apex of the protrusion and the central axis is such that the one rotation axis before the sleeve and the one rotation axis or the flexible shaft are connected to each other. 3. The vehicle power seat according to claim 1, wherein the power seat is set smaller than a radius of the flexible shaft. 前記スリーブの断面形状は、多角形に形成され、前記多角形の面と中心軸との最短距離が、前記スリーブと前記一方の回転軸又は前記フレキシブルシャフトと接続する前において前記一方の回転軸又は前記フレキシブルシャフトの半径よりも小さく設定されていることを特徴とする請求項１又は２記載の車両用パワーシート。   The cross-sectional shape of the sleeve is formed in a polygonal shape, and the shortest distance between the polygonal surface and a central axis is the one rotating shaft or the flexible shaft before the sleeve is connected to the one rotating shaft or the flexible shaft. The vehicle power seat according to claim 1 or 2, wherein the power seat is set to be smaller than a radius of the flexible shaft. 前記スリーブは、複数のスリットが形成され、前記スリット間の部位が内周側に絞られていることを特徴とする請求項１又は２記載の車両用パワーシート。   3. The vehicle power seat according to claim 1, wherein the sleeve is formed with a plurality of slits, and a portion between the slits is narrowed toward an inner peripheral side. 4. 前記フレキシブルシャフトの他端の外周面を角形状に形成してなる第２係合軸部と、
前記駆動側回転軸および前記従動側回転軸のうち他方の回転軸の先端に形成され、かつ、挿入される前記第２係合軸部と軸回転方向に係合する角形状に内周面が形成された第２係合溝部と、
前記他方の回転軸と前記フレキシブルシャフトが係合された部分の周囲に配されるとともに、前記他方の回転軸の外形、及び前記フレキシブルシャフトの外形を固定する第２のスリーブと、
を備え、
前記第２のスリーブの内周面は、前記他方の回転軸の外周面、及び前記フレキシブルシャフトの外周面のそれぞれと圧接することを特徴とする請求項１乃至５のいずれか一に記載の車両用パワーシート。 A second engagement shaft portion formed by forming the outer peripheral surface of the other end of the flexible shaft into a square shape;
An inner peripheral surface is formed in an angular shape that is formed at the tip of the other rotation shaft of the drive side rotation shaft and the driven side rotation shaft and engages with the second engagement shaft portion to be inserted in the shaft rotation direction. A formed second engaging groove,
A second sleeve that is disposed around a portion where the other rotating shaft and the flexible shaft are engaged, and that fixes the outer shape of the other rotating shaft and the outer shape of the flexible shaft;
With
The vehicle according to any one of claims 1 to 5, wherein an inner peripheral surface of the second sleeve is in pressure contact with each of an outer peripheral surface of the other rotating shaft and an outer peripheral surface of the flexible shaft. Power seat.
JP2005153955A 2005-05-26 2005-05-26 Power seat for vehicle Withdrawn JP2006327405A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Family

ID=37549551

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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