JP2016121744A - One-way clutch - Google Patents

One-way clutch Download PDF

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JP2016121744A
JP2016121744A JP2014261710A JP2014261710A JP2016121744A JP 2016121744 A JP2016121744 A JP 2016121744A JP 2014261710 A JP2014261710 A JP 2014261710A JP 2014261710 A JP2014261710 A JP 2014261710A JP 2016121744 A JP2016121744 A JP 2016121744A
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Prior art keywords
ring
outer ring
engagement piece
inner ring
wall surface
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Inventor
加藤 晃一
Koichi Kato
晃一 加藤
雄二 岩瀬
Yuji Iwase
雄二 岩瀬
鈴木 陽介
Yosuke Suzuki
陽介 鈴木
正太郎 加藤
Seitaro Kato
正太郎 加藤
隆人 遠藤
Takahito Endo
隆人 遠藤
清太郎 信安
Seitaro Nobuyasu
清太郎 信安
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2014261710A priority Critical patent/JP2016121744A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a one-way clutch which prevents slide resistance and inclination of an engagement piece.SOLUTION: An engagement piece 1 has a side surface perpendicular to a rotation center axis. A housing part 4 has an inner wall surface 4B facing the side surface. A protrusion part 6 protruding to the inner wall surface 4B side is formed on the side surface. A recessed part 7 which allows the protrusion part 6 to be inserted thereinto and guides the protrusion part 6 in a reciprocating rotation direction is formed on the inner wall surface 4B. A protruding length of the protrusion part 6 from the side surface is longer than a depth of the recessed part.SELECTED DRAWING: Figure 2

Description

この発明は、相対回転可能な内輪と外輪との間に係合片(係合爪)を設け、所定の一方向では係合片が相手部材に係合してトルクを伝達し、他の回転方向では、係合片が相手部材から外れて内輪と外輪とが相対回転するように構成されたワンウェイクラッチに関するものである。   In the present invention, an engagement piece (engagement claw) is provided between an inner ring and an outer ring that can be rotated relative to each other, and the engagement piece engages with a mating member in a predetermined direction to transmit torque. In the direction, the present invention relates to a one-way clutch configured such that the engagement piece is disengaged from the counterpart member and the inner ring and the outer ring rotate relative to each other.

この種のワンウェイクラッチが特許文献1に記載されている。そのインナーレース(内輪)の外周部に、鋸歯状の係合部が形成され、アウターレースには、内周側に開口した凹部が形成され、その凹部の内部に爪片が回動可能に収容されている。爪片は、先端部が前記鋸歯状の係合部に噛み合うように鋭角的な形状に形成され、後端部が回動面となるように円弧面として形成され、その先端部がインナーレース側に突き出すように押圧するバネが設けられている。したがって、爪片の先端部が係合部に突き当たる方向にインナーレースとアウターレースとの間にトルクが作用すると、係合部および爪片によってトルクが伝達される。すなわち、係合状態になる。これとは反対方向のトルクが作用すると、爪片がインナーレースの外周面で凹部側に押し戻されて爪片が係合部に突き当たる(係合する)ことがないので、インナーレースとアウターレースとが相対回転し、両者の間でトルクが伝達されることはない。すなわち、解放状態になる。   This type of one-way clutch is described in Patent Document 1. A serrated engagement portion is formed on the outer periphery of the inner race (inner ring), and a recess opened on the inner periphery is formed on the outer race, and a claw piece is rotatably accommodated in the recess. Has been. The claw piece is formed in an acute shape so that the front end portion meshes with the serrated engaging portion, and is formed as an arc surface so that the rear end portion becomes a rotation surface, and the front end portion is on the inner race side. A spring is provided for pressing so as to protrude. Therefore, when torque acts between the inner race and the outer race in the direction in which the tip of the claw piece abuts on the engaging portion, the torque is transmitted by the engaging portion and the claw piece. That is, it will be in an engagement state. When torque in the opposite direction is applied, the claw pieces are pushed back toward the concave portion on the outer peripheral surface of the inner race, and the claw pieces do not hit (engage) the engaging portion. Rotate relative to each other, and no torque is transmitted between them. That is, it becomes a released state.

国際公開第2012/073309号International Publication No. 2012/073309

特許文献1に記載された構成では、爪片は、その円弧面状の後端部を、凹部の内面である凹円弧面状の受け面に接触させることにより回動可能に保持されている。そして、その回動中心軸線に沿う方向に変位しないように、左右の両側面は、凹部の内壁面とその内壁面に対向するように取り付けた板状部材の内面に接触させられている。このような平坦面同士が接触した状態では摺動抵抗が大きくなって爪片の回動が阻害される可能性がある。特許文献1に記載されたワンウェイクラッチでは、前記内壁面に爪片に向けて突出部が形成され、その突出部の先端面が爪片の側面に接触している。このような構成では、接触面積が小さいことにより摺動抵抗が小さくなるものの、爪片を回動可能に支持する構造は、上記のように後端側の円弧面を凹部の凹円弧面に嵌め込んだ構造であって、回転中心軸を設けてその回転中心軸を支持する構成ではないから、爪片が左右方向に傾いて係合部に係合するいわゆる片当たりが生じる可能性がある。   In the configuration described in Patent Document 1, the claw piece is rotatably held by bringing the arc-shaped rear end portion into contact with a concave arc-shaped receiving surface that is an inner surface of the concave portion. The left and right side surfaces are brought into contact with the inner wall surface of the recess and the inner surface of the plate-like member attached so as to face the inner wall surface so as not to be displaced in the direction along the rotation center axis. In such a state where the flat surfaces are in contact with each other, there is a possibility that the sliding resistance becomes large and the rotation of the claw piece is obstructed. In the one-way clutch described in Patent Document 1, a protruding portion is formed on the inner wall surface toward the claw piece, and a tip end surface of the protruding portion is in contact with a side surface of the claw piece. In such a configuration, although the sliding resistance is reduced due to the small contact area, the structure that supports the claw piece in a pivotable manner fits the arc surface on the rear end side to the concave arc surface of the recess as described above. However, since the rotation center axis is not provided and the rotation center axis is not supported, there is a possibility that a so-called one-piece contact in which the claw piece is inclined in the left-right direction and engaged with the engaging portion may occur.

この発明は上記の技術的課題に着目してなされたものであって、ワンウェイクラッチにおける係合片の回動に対する摺動抵抗を低減し、同時に係合片の片当たりを防止もしくは抑制することを目的とするものである。   The present invention has been made paying attention to the above technical problem, and reduces sliding resistance against rotation of the engagement piece in the one-way clutch, and at the same time, prevents or suppresses the contact of the engagement piece. It is the purpose.

上記の目的を達成するために、この発明は、相対的に回転可能な内輪と外輪とを有し、これら内輪の外周部と外輪の内周部とのいずれか一方に前記内輪の外周部と前記外輪の内周部とのいずれか他方に対して開口した収容部が形成されるとともに、その収容部に前記他方に対して弾性力によって斜めに突出させられる係合片が往復回動可能に収容され、その係合片の突出した先端部に前記他方に形成された係合部が突き当たる第1の方向に前記内輪と外輪との間でトルクが作用することにより前記内輪と前記外輪とが係合して一体化され、かつ前記第1の方向とは反対の第2の方向に前記内輪と外輪との間でトルクが作用することにより前記内輪と前記外輪とが相対回転するように構成されたワンウェイクラッチにおいて、前記係合片は、回動中心軸線に対して垂直な側面を有し、前記収容部は、前記側面に対向する内壁面を有し、前記側面と前記内壁面とのいずれか一方には他方に向けて突出した突起部が形成され、かつ前記側面と前記内壁面とのいずれか他方には前記突起部を挿入させかつ前記往復回動方向に案内する凹部が形成され、前記突起部の前記側面からの突出長さが前記凹部の深さより長いことを特徴とするものである。   In order to achieve the above object, the present invention has a relatively rotatable inner ring and an outer ring, and the outer ring part of the inner ring is provided on either the outer ring part of the inner ring or the inner ring part of the outer ring. A housing portion that is open to the other of the inner peripheral portion of the outer ring is formed, and an engagement piece that is obliquely protruded by elastic force with respect to the other of the housing portion can be reciprocally rotated. The inner ring and the outer ring are accommodated by a torque acting between the inner ring and the outer ring in a first direction in which the engaging portion formed on the other side abuts against the protruding tip of the engaging piece. The inner ring and the outer ring are configured to rotate relative to each other when torque is applied between the inner ring and the outer ring in a second direction opposite to the first direction. In the one-way clutch, the engagement piece is A side surface perpendicular to the central axis, the housing portion has an inner wall surface facing the side surface, and one of the side surface and the inner wall surface has a protrusion protruding toward the other side; A recess is formed on the other side of the side surface and the inner wall surface, and the projection is inserted into the guide and guided in the reciprocating rotation direction. It is characterized by being longer than the depth of the recess.

この発明によれば、係合片とこれが保持されている内輪もしくは外輪との接触面積が、突起部の先端の小さい面積になるから、係合片が回動する際の摺動抵抗を低減することができる。また突起部が凹部に挿入されていてその傾きが抑制されるので、係合片の片当たりを防止もしくは抑制することができる。   According to the present invention, the contact area between the engagement piece and the inner ring or the outer ring on which the engagement piece is held becomes a small area at the tip of the protrusion, so the sliding resistance when the engagement piece rotates is reduced. be able to. Moreover, since the protrusion part is inserted in the recessed part and the inclination is suppressed, the contact | abutting of the engagement piece can be prevented or suppressed.

この発明に係るワンウェイクラッチの一部を示す正面図である。It is a front view which shows a part of one-way clutch which concerns on this invention. そのII−II線矢視断面図である。It is the II-II sectional view taken on the line. 突起部と凹部との寸法を示す説明図である。It is explanatory drawing which shows the dimension of a projection part and a recessed part.

この発明に係るワンウェイクラッチの基本的もしくは原理的な構成は、前述した特許文献1に記載されているワンウェイクラッチと同様であってよく、その構成を簡単に説明すると、図1はその係合片(係合爪)1の部分を示しており、内輪(インナーレース)2と外輪(アウターレース)3とが同心円状にかつ相対回転可能に配置されており、係合片1はその外輪3に保持されている。   The basic or basic configuration of the one-way clutch according to the present invention may be the same as that of the one-way clutch described in Patent Document 1 described above. To briefly explain the configuration, FIG. (Engagement claw) 1 is shown, and an inner ring (inner race) 2 and an outer ring (outer race) 3 are arranged concentrically and relatively rotatable, and the engagement piece 1 is attached to the outer ring 3. Is retained.

係合片1は、従来知られているラチェット機構における「爪」と同様の機能を果たす形状をなしており、先端部1Aが丸みを帯びた鋭角状をなし、後端部1Bの外面が円弧状をなすように形成されている。この係合片1を収容した収容部4が外輪3の内周部分に形成されている。その収容部4は、外輪3の内周側に向けて開口した凹部であって、係合片1の輪郭形状とほぼ同形状に形成されている。特に係合片1の後端部1Bを嵌め込む部分は、その後端面1Bと同じ曲率の円弧状の受け面4Aとされている。したがって、係合片1はその後端部1Bの曲率中心を中心にして所定の角度、回動できるように構成されている。また、収容部4の大きさは、係合片1を外輪3の内周側に突出させずに収容し、かつ係合片1が回動した場合には、前記先端部1Aが内輪2側に突出する大きさとされている。係合片1は弾性力を受けて、先端部1aが内輪2側に突出するように構成されている。その弾性力を発生するバネ5が、収容部4の内部に、係合片1の先端部1Aを押圧するように配置されている。   The engaging piece 1 has a shape that performs the same function as a “claw” in a conventionally known ratchet mechanism, the tip 1A is rounded, and the outer surface of the rear end 1B is a circle. It is formed so as to form an arc. An accommodating portion 4 that accommodates the engaging piece 1 is formed in the inner peripheral portion of the outer ring 3. The accommodating portion 4 is a concave portion that opens toward the inner peripheral side of the outer ring 3, and is formed in substantially the same shape as the contour shape of the engagement piece 1. In particular, a portion into which the rear end 1B of the engagement piece 1 is fitted is an arcuate receiving surface 4A having the same curvature as the rear end surface 1B. Therefore, the engagement piece 1 is configured to be able to rotate by a predetermined angle around the center of curvature of the rear end 1B. Further, the size of the accommodating portion 4 is such that when the engaging piece 1 is accommodated without protruding to the inner peripheral side of the outer ring 3 and the engaging piece 1 is rotated, the distal end portion 1A is located on the inner ring 2 side. It is the size which protrudes. The engagement piece 1 receives an elastic force and is configured such that the tip end portion 1a protrudes toward the inner ring 2 side. A spring 5 that generates the elastic force is disposed inside the accommodating portion 4 so as to press the distal end portion 1 </ b> A of the engagement piece 1.

図2は、図1におけるII−II線に沿う断面図であり、係合片1の側面1Cには突起部6が設けられている。この突起部6は、係合片1の回動動作を円滑化するためのものであって、収容部4の内壁面4Bに対向する側面1Cに形成されている。また、その内壁面4Bには、突起部6を挿入させる凹部7が形成されている。この凹部7は、係合片1の回動動作をガイドするためのものであり、したがって係合片1が前述したように回動する際の突起部6の軌跡に沿った形状の凹溝として形成されている。特にこれら突起部6および凹部7は、係合片1の側面1Cと収容部4の内壁面4Bとを接触させることなく、係合片1を回動させるためのものであり、したがって図3に示すように、突起部6の長さ(突出長さ)Lが凹部7の深さDより長くなっている。すなわち、突起部6の先端面が凹部7の底面(溝として見た場合の底面)に接触し、その状態で係合片1の側面が収容部4の内壁面4Bから僅かに離れて両者が接触しないようになっている。なお、凹部7の幅は、突起部6が円形断面のものであれば、突起部6の外径程度もしくはそれより僅かに大きい程度である。   FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and a protrusion 6 is provided on the side surface 1 </ b> C of the engagement piece 1. The protrusion 6 is for facilitating the rotation operation of the engagement piece 1, and is formed on the side surface 1 </ b> C facing the inner wall surface 4 </ b> B of the storage portion 4. Further, the inner wall surface 4B is formed with a recess 7 into which the protrusion 6 is inserted. The concave portion 7 is for guiding the rotation operation of the engagement piece 1, and therefore, as a concave groove having a shape along the locus of the projection portion 6 when the engagement piece 1 rotates as described above. Is formed. In particular, the protrusion 6 and the recess 7 are for rotating the engaging piece 1 without bringing the side surface 1C of the engaging piece 1 into contact with the inner wall surface 4B of the accommodating portion 4, and accordingly, FIG. As shown, the length (projection length) L of the protrusion 6 is longer than the depth D of the recess 7. That is, the front end surface of the protrusion 6 contacts the bottom surface of the recess 7 (the bottom surface when viewed as a groove), and in this state, the side surface of the engagement piece 1 is slightly separated from the inner wall surface 4B of the housing portion 4 so that both It is designed not to touch. The width of the recess 7 is about the outer diameter of the protrusion 6 or slightly larger than that if the protrusion 6 has a circular cross section.

一方、内輪2の外周面には、鋸歯状の係合部8が一定間隔で複数、形成されている。その係合部8は、内輪2側に斜めに突き出た係合片1の先端部を突き当てさせてトルクを伝達可能にする部分であり、係合片1の先端部の形状とほぼ同様の形状の凹部である。   On the other hand, a plurality of serrated engaging portions 8 are formed on the outer peripheral surface of the inner ring 2 at regular intervals. The engaging portion 8 is a portion that makes the tip of the engaging piece 1 projecting obliquely toward the inner ring 2 side to be able to transmit torque, and is substantially similar to the shape of the tip of the engaging piece 1. It is a recessed part of a shape.

この発明の実施例である上記のワンウェイクラッチの作用について説明すると、トルク伝達の一方向性は、特許文献1などの知られている従来のワンウェイクラッチと同様である。すなわち、内輪2と外輪3との間に作用するトルクが、係合片1の先端部を係合部8に突き当てる第1の方向のトルクの場合、係合片1を介して内輪2と外輪3との間でトルクが伝達される。トルクの方向がこれとは反対の第2の方向の場合には、バネ5の弾性力で押されて斜めに突き出ている係合片1の下面(図1での下面)に内輪2の外周面が接触して係合片1がバネ5の弾性力に抗して収容部4側に押し戻されるので、係合片1の先端部が係合部8から外れ、内輪2と外輪3とが相対的に回転可能になり、両者の間でトルクが伝達されることはない。   The operation of the above-described one-way clutch according to the embodiment of the present invention will be described. The one-way characteristic of torque transmission is the same as that of a known conventional one-way clutch such as Patent Document 1. That is, when the torque acting between the inner ring 2 and the outer ring 3 is the torque in the first direction in which the tip of the engagement piece 1 is abutted against the engagement portion 8, Torque is transmitted to and from the outer ring 3. When the direction of torque is the second direction opposite to this, the outer periphery of the inner ring 2 is placed on the lower surface (lower surface in FIG. 1) of the engagement piece 1 that is pushed by the elastic force of the spring 5 and protrudes obliquely. Since the surfaces come into contact with each other and the engagement piece 1 is pushed back toward the accommodating portion 4 against the elastic force of the spring 5, the distal end portion of the engagement piece 1 is disengaged from the engagement portion 8, and the inner ring 2 and the outer ring 3 are moved. It becomes relatively rotatable and torque is not transmitted between the two.

係合片1は、内輪2側に突き出た状態と収容部4に押し戻された状態との間で往復回動する。その場合、係合片1の側面は収容部4の内壁面4Bから離れており、突起部6の先端の小さい面積の部分が凹部7の底面の部分に接触しているから、係合片1が回動する際の摺動抵抗が小さくなる。また、突起部6は、凹部7の底面の部分に単に接触しているだけでなく、凹部7の内部に緩く嵌合しているから、係合片1がその回動面(回転中心軸線に対して垂直な面)に対して傾こうとした場合には突起部6が凹部7の内面に接触して傾きが阻止もしくは抑制される。その結果、係合片1のいわゆる片当たりを回避もしくは抑制することができる。   The engagement piece 1 reciprocates between a state where it protrudes toward the inner ring 2 side and a state where it is pushed back by the accommodating portion 4. In that case, the side surface of the engagement piece 1 is separated from the inner wall surface 4B of the accommodating portion 4, and the small area portion at the tip of the projection portion 6 is in contact with the bottom surface portion of the recess portion 7, so that the engagement piece 1 The sliding resistance when rotating is reduced. Further, since the protrusion 6 is not only in contact with the bottom surface portion of the recess 7 but is loosely fitted inside the recess 7, the engagement piece 1 is moved to its rotating surface (rotation center axis). In the case where the projection 6 is inclined with respect to the surface perpendicular to the surface, the protrusion 6 comes into contact with the inner surface of the recess 7 to prevent or suppress the inclination. As a result, the so-called contact of the engagement piece 1 can be avoided or suppressed.

なお、この発明は上述した実施例に限定されない。例えば、図1には係合片1を1つ示してあるが、この発明に係るワンウェイクラッチは複数の係合片1を備えていてよい。また、係合片1の左右両側に収容部4の内壁面が存在する場合には、突起部6や凹部7を係合挟んだ両側に設けてもよい。さらに、この発明においては、係合片は外輪に替えて内輪に設けてもよい。   In addition, this invention is not limited to the Example mentioned above. For example, although one engagement piece 1 is shown in FIG. 1, the one-way clutch according to the present invention may include a plurality of engagement pieces 1. Moreover, when the inner wall surface of the accommodating part 4 exists in the right-and-left both sides of the engagement piece 1, you may provide in the both sides which interpose the protrusion part 6 and the recessed part 7 between engagement. Further, in the present invention, the engagement piece may be provided on the inner ring instead of the outer ring.

1…係合片(係合爪)、 2…内輪(インナーレース)、 3…外輪(アウターレース)、 1A…先端部、 1B…後端部、 4…収容部、 4A…受け面、 4B…内壁面、 5…バネ、 6…突起部、 7…凹部、 L…(突起部の長さ)突出長さ、 D…(凹部の)深さ、 8…係合部。     DESCRIPTION OF SYMBOLS 1 ... Engagement piece (engagement nail | claw), 2 ... Inner ring | wheel (inner race), 3 ... Outer ring | wheel (outer race), 1A ... Tip part, 1B ... Rear-end part, 4 ... Accommodating part, 4A ... Receiving surface, 4B ... Inner wall surface, 5 ... spring, 6 ... projection, 7 ... recess, L ... (length of projection), projection length, D ... depth of recess, 8 ... engagement portion.

Claims (1)

相対的に回転可能な内輪と外輪とを有し、これら内輪の外周部と外輪の内周部とのいずれか一方に前記内輪の外周部と前記外輪の内周部とのいずれか他方に対して開口した収容部が形成されるとともに、その収容部に前記他方に対して弾性力によって斜めに突出させられる係合片が往復回動可能に収容され、その係合片の突出した先端部に前記他方に形成された係合部が突き当たる第1の方向に前記内輪と外輪との間でトルクが作用することにより前記内輪と前記外輪とが係合して一体化され、かつ前記第1の方向とは反対の第2の方向に前記内輪と外輪との間でトルクが作用することにより前記内輪と前記外輪とが相対回転するように構成されたワンウェイクラッチにおいて、
前記係合片は、回動中心軸線に対して垂直な側面を有し、
前記収容部は、前記側面に対向する内壁面を有し、
前記側面と前記内壁面とのいずれか一方は他方に向けて突出した突起部が形成され、
前記側面と前記内壁面とのいずれか他方には前記突起部を挿入させかつ前記往復回動方向に案内する凹部が形成され、
前記突起部の前記側面からの突出長さが前記凹部の深さより長い
ことを特徴とするワンウェイクラッチ。
A relatively rotatable inner ring and an outer ring, and either one of the outer peripheral part of the inner ring and the inner peripheral part of the outer ring or the other of the outer peripheral part of the inner ring and the inner peripheral part of the outer ring. And an engaging piece that is obliquely protruded by the elastic force with respect to the other is accommodated in the accommodating portion so as to be reciprocally rotatable. The inner ring and the outer ring are engaged and integrated by a torque acting between the inner ring and the outer ring in a first direction in which the engaging portion formed on the other side abuts, and the first ring In the one-way clutch configured such that the inner ring and the outer ring rotate relative to each other by a torque acting between the inner ring and the outer ring in a second direction opposite to the direction,
The engagement piece has a side surface perpendicular to the rotation center axis.
The accommodating portion has an inner wall surface facing the side surface,
Either one of the side surface and the inner wall surface is formed with a protruding portion protruding toward the other,
The other side of the side surface and the inner wall surface is formed with a recess for inserting the protrusion and guiding it in the reciprocating rotation direction,
The one-way clutch characterized in that a protruding length of the protruding portion from the side surface is longer than a depth of the recessed portion.
JP2014261710A 2014-12-25 2014-12-25 One-way clutch Pending JP2016121744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014261710A JP2016121744A (en) 2014-12-25 2014-12-25 One-way clutch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014261710A JP2016121744A (en) 2014-12-25 2014-12-25 One-way clutch

Publications (1)

Publication Number Publication Date
JP2016121744A true JP2016121744A (en) 2016-07-07

Family

ID=56327304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014261710A Pending JP2016121744A (en) 2014-12-25 2014-12-25 One-way clutch

Country Status (1)

Country Link
JP (1) JP2016121744A (en)

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