JP2010242889A

JP2010242889A - One-way clutch

Info

Publication number: JP2010242889A
Application number: JP2009093223A
Authority: JP
Inventors: Seiichi Takada; 声一高田; Hiroyoshi Ito; 浩義伊藤; Chiyori Sato; ちより佐藤
Original assignee: NTN Corp; NTN Toyo Bearing Co Ltd
Current assignee: NTN Corp
Priority date: 2009-04-07
Filing date: 2009-04-07
Publication date: 2010-10-28

Abstract

<P>PROBLEM TO BE SOLVED: To make compact a one-way clutch including a torque transmitted ring which rotates in unison with an outer ring in radial direction. <P>SOLUTION: The one-way clutch can be made more compact in radial direction than prior art which inserts the torque transmitted ring around outer ring outer periphery by making substantially the same outer diameter of the torque transmitted ring 10 as outer diameter of the outer ring 11 by being configured so as to provide a radial direction groove 1b on one end of the torque transmitted ring 10 and simultaneously to integrally form a plurality of columns 23 on a lid 22 which blocks one of the open ends of the outer ring 11 and to fix a tip of each of the columns 23 to a blocking collar 16 which blocks the other of the open end of the outer ring 11 and to insert a protuberance 22a provided on the external surface of the lid 22 in the radial direction groove 1b of the torque transmitted ring 10 and to connect the torque transmitted ring 10 and the outer ring 11 in the axial direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、事務機の駆動部等において用いられ、プーリ等のトルク伝達輪を備えた一方向クラッチに関する。 The present invention relates to a one-way clutch that is used in a drive unit or the like of an office machine and includes a torque transmission wheel such as a pulley.

事務機の駆動部等において用いられるころ式一方向クラッチは、一般に、外輪と、この外輪の内径面に設けられたポケットに収納されるころ及び付勢ばねと、外輪の開放端面の閉塞手段とを備え、ポケットの底面（カム面）と外輪中心部に挿通される軸との間で所定のクサビ角が形成され、付勢ばねでころをクサビ角の狭小方向（ポケットの狭小側）に付勢するようになっている（例えば、特許文献１参照。）。 A roller type one-way clutch used in a drive unit or the like of an office machine generally includes an outer ring, a roller and a biasing spring housed in a pocket provided on an inner diameter surface of the outer ring, and a closing means for an open end surface of the outer ring. A predetermined wedge angle is formed between the bottom surface (cam surface) of the pocket and the shaft inserted through the center of the outer ring, and the rollers are attached to the wedge angle narrowing direction (narrow side of the pocket) by an urging spring. (For example, refer to Patent Document 1).

前記特許文献１に開示された一方向クラッチは、外輪の外周にトルク伝達輪（外装部材）が外輪と一体回転するように嵌め込まれており、このトルク伝達輪から軸に一方向のトルクを伝達するか、あるいは軸からトルク伝達輪に一方向のトルクを伝達するようになっている。 The one-way clutch disclosed in Patent Document 1 is fitted on the outer periphery of an outer ring so that a torque transmission wheel (exterior member) rotates integrally with the outer ring, and transmits torque in one direction from the torque transmission wheel to the shaft. Alternatively, one-way torque is transmitted from the shaft to the torque transmission wheel.

特開平９−８９０１１号公報JP-A-9-89011

上記特許文献１の一方向クラッチでは、外輪の外周にトルク伝達輪を嵌め込んでいるため、トルク伝達輪を含めた全体の径方向サイズが大きくなりやすいという問題がある。一方で、事務機の分野では、事務機全体の小型化の要求が高まるにつれて、その部品である一方向クラッチについても径方向サイズのコンパクト化が強く求められるようになってきている。 In the one-way clutch of Patent Document 1, since the torque transmission wheel is fitted on the outer periphery of the outer ring, there is a problem that the entire radial size including the torque transmission wheel tends to be large. On the other hand, in the field of office machines, as the demand for downsizing of the entire office machine increases, the one-way clutch which is a part of the office machine is strongly required to be downsized in the radial direction.

そこで、本発明は、外輪と一体回転するトルク伝達輪を有する一方向クラッチを径方向にコンパクト化することを課題とする。 Therefore, an object of the present invention is to make the one-way clutch having a torque transmission wheel that rotates integrally with the outer ring compact in the radial direction.

上記の課題を解決するために、本発明は、トルク伝達輪と、このトルク伝達輪と一体に回転する外輪と、この外輪の内径面に形成された複数のポケットに収納されたころ及びこれらの各ころの付勢ばねと、前記外輪の開放端面の閉塞手段とによって構成され、前記ポケットの底面（カム面）と前記外輪の中心部に挿通される軸との間で所定のクサビ角δが形成され、前記付勢ばねによって前記ころをクサビ角δの狭小方向に付勢するようにした一方向クラッチにおいて、前記トルク伝達輪と外輪とを軸方向に連結した構成を採ったものである。 In order to solve the above problems, the present invention provides a torque transmission wheel, an outer ring that rotates integrally with the torque transmission wheel, rollers accommodated in a plurality of pockets formed on an inner diameter surface of the outer ring, and these A predetermined wedge angle δ is formed between the biasing spring of each roller and the closing means of the open end surface of the outer ring, and between the bottom surface (cam surface) of the pocket and the shaft inserted through the center of the outer ring. In the one-way clutch formed and urged by the urging spring in the narrow direction of the wedge angle δ, the torque transmission wheel and the outer ring are connected in the axial direction.

すなわち、トルク伝達輪と外輪とを軸方向に連結した構成とすることにより、トルク伝達輪の外径を外輪外径とほぼ同じにして、外輪外周にトルク伝達輪を嵌め込んだ従来のものよりも径方向にコンパクト化できるようにしたのである。 That is, by using a configuration in which the torque transmission wheel and the outer ring are connected in the axial direction, the outer diameter of the torque transmission wheel is made substantially the same as the outer diameter of the outer ring, and the torque transmission wheel is fitted on the outer periphery of the outer ring. Is also made compact in the radial direction.

上記の構成において、前記外輪の一方の開放端面の閉塞手段が、前記外輪の一端部に設けられた内向きの閉塞つばである場合は、この閉塞つばと前記トルク伝達輪とに、互いを一体回転するように連結する連結部を設けることができる。 In the above configuration, when the closing means on one open end surface of the outer ring is an inward closing collar provided at one end of the outer ring, the closing collar and the torque transmission wheel are integrated with each other. A connecting portion that is connected so as to rotate may be provided.

一方、前記外輪の一方の開放端面の閉塞手段が、前記外輪に固定される蓋である場合には、この蓋と前記トルク伝達輪とに、互いを一体回転するように連結する連結部を設けることができる。ここで、前記蓋を合成樹脂で形成するようにすれば、蓋の成形形状の自由度が高くなり、トルク伝達輪との連結部の形状変更が行いやすくなる。また、前記蓋の外輪に対する固定手段としては、前記外輪の外径面にその一端から軸方向に延びる溝を設け、この軸方向溝の底面に係合凹部を設けるとともに、前記蓋にその内面から軸方向に延びる腕を設け、この腕の先端側に内向きに突出する係合凸部を設けて、前記腕を前記軸方向溝に嵌め込んで周方向に固定し、前記係合凸部を前記係合凹部に嵌め込んで軸方向に固定するものを採用することができる。 On the other hand, when the closing means of one open end surface of the outer ring is a lid fixed to the outer ring, a connecting portion for connecting the lid and the torque transmission wheel so as to rotate together is provided. be able to. Here, if the lid is formed of synthetic resin, the degree of freedom of the shape of the lid is increased, and the shape of the connecting portion with the torque transmission wheel can be easily changed. Further, as a means for fixing the lid to the outer ring, a groove extending in the axial direction from one end thereof is provided on the outer diameter surface of the outer ring, an engagement recess is provided on the bottom surface of the axial groove, and the lid is provided with an inner surface from the inner surface. An arm extending in the axial direction is provided, and an engaging convex portion protruding inwardly is provided on the distal end side of the arm, and the arm is fitted in the axial groove and fixed in the circumferential direction. It is possible to employ one that is fitted in the engaging recess and fixed in the axial direction.

また、前記トルク伝達輪を合成樹脂で形成するようにすれば、トルク伝達輪の成形形状の自由度が高くなり、外輪の閉塞つばまたは蓋との連結部の形状変更が行いやすくなる。 Further, if the torque transmission wheel is formed of synthetic resin, the degree of freedom of the shape of the torque transmission wheel is increased, and it becomes easy to change the shape of the connecting portion of the outer ring with the closed collar or lid.

本発明の一方向クラッチは、上述したように、トルク伝達輪と外輪とを軸方向に連結して、トルク伝達輪の外径を外輪外径とほぼ同じにできるようにしたものであるから、径方向のコンパクト化が図れ、特に小型化の要求が高い事務機等に組み込むのに適している。また、トルク伝達輪の材料費が削減できるという利点もある。 As described above, the one-way clutch of the present invention connects the torque transmission wheel and the outer ring in the axial direction so that the outer diameter of the torque transmission wheel can be made substantially the same as the outer diameter of the outer ring. It can be made compact in the radial direction, and is particularly suitable for incorporation into office machines that are highly demanded for miniaturization. There is also an advantage that the material cost of the torque transmission wheel can be reduced.

実施例１の分解斜視図Exploded perspective view of Example 1 実施例１の断面図Sectional view of Example 1 図２のIII−III線断面図Sectional view taken along line III-III in FIG. 実施例１の変形例の分解斜視図The exploded perspective view of the modification of Example 1 実施例２の分解斜視図Exploded perspective view of Example 2 実施例２の図３に対応する断面図Sectional drawing corresponding to FIG. 3 of Example 2 実施例３の分解斜視図Exploded perspective view of Example 3 実施例３の断面図Sectional drawing of Example 3 図８のIX−IX線断面図IX-IX sectional view of FIG. 図８のＸ−Ｘ線断面図XX sectional view of FIG. 実施例４の分解斜視図Exploded perspective view of Example 4

以下、この発明に係る一方向クラッチの実施例を添付図面に基づいて説明する。 Embodiments of a one-way clutch according to the present invention will be described below with reference to the accompanying drawings.

図１から図３に示す実施例１の一方向クラッチは、トルク伝達輪１０、外輪１１、保持器１２、ころ１３、及び付勢ばね１４の組み合わせによって構成される。使用時には、この一方向クラッチのセンターに軸１５が挿通され、その軸１５の外周に一方向クラッチを抜け止めする止め輪９が嵌め込まれる（図２、３参照）。 The one-way clutch of the first embodiment shown in FIGS. 1 to 3 is configured by a combination of a torque transmission wheel 10, an outer ring 11, a cage 12, rollers 13, and an urging spring 14. In use, the shaft 15 is inserted through the center of the one-way clutch, and a retaining ring 9 for retaining the one-way clutch is fitted on the outer periphery of the shaft 15 (see FIGS. 2 and 3).

トルク伝達輪１０は、合成樹脂製のローラ１の外径面に設けた環状凹部１ａに筒状のゴム部材２を嵌め込んだプーリであり、前記軸１５が挿通された状態でゴム部材２に巻き掛けられるベルト（図示省略）を介して外部のプーリ（図示省略）との間でトルク伝達を行う。そのローラ１の一端部には径方向に延びる溝１ｂが２箇所に設けられ、これらの各径方向溝１ｂが、後述するように、保持器１２の一部を構成する環状の蓋２２との連結部となっている。また、ローラ１の外径は外輪１１の外径に一致し、ゴム部材２の厚みは薄いため、トルク伝達輪１０の外径は外輪１１外径とほぼ同じになっている。 The torque transmission wheel 10 is a pulley in which a cylindrical rubber member 2 is fitted in an annular recess 1a provided on the outer diameter surface of a synthetic resin roller 1, and the rubber member 2 is inserted into the rubber member 2 with the shaft 15 inserted therethrough. Torque is transmitted to an external pulley (not shown) via a belt (not shown) to be wound. One end of the roller 1 is provided with two grooves 1b extending in the radial direction. Each of the radial grooves 1b is connected to an annular lid 22 constituting a part of the cage 12, as will be described later. It is a connecting part. Further, since the outer diameter of the roller 1 coincides with the outer diameter of the outer ring 11 and the thickness of the rubber member 2 is thin, the outer diameter of the torque transmission wheel 10 is substantially the same as the outer diameter of the outer ring 11.

外輪１１は、含油焼結合金又は焼結合金製であり、その両方の開放端のうちの一方は蓋２２で閉塞され、他方は外輪１１の他端部に設けられた内向きの閉塞つば１６により閉塞されて、外輪１１に組み込まれたころ１３及び付勢ばね１４が抜け出さないようになっている（図３参照）。また、その内径面の全周にわたり、一定間隔をおいてポケット底面（カム面）１７が５箇所に形成されている（図２参照）。そして、各ポケット底面１７の間の径方向に傾斜した段差部分が、付勢ばね１４及び保持器１２を組み込む際の位置決め部１８となる。 The outer ring 11 is made of an oil-impregnated sintered alloy or a sintered alloy, and one of the open ends of the outer ring 11 is closed by the lid 22, and the other is an inward closed collar 16 provided at the other end of the outer ring 11. The roller 13 and the urging spring 14 incorporated in the outer ring 11 are prevented from coming out (see FIG. 3). Further, pocket bottom surfaces (cam surfaces) 17 are formed at five positions at regular intervals over the entire circumference of the inner diameter surface (see FIG. 2). A step portion inclined in the radial direction between the pocket bottom surfaces 17 serves as a positioning portion 18 when the urging spring 14 and the cage 12 are assembled.

前記の閉塞つば１６は、前記位置決め部１８と内径面２０に挟まれた５箇所にそれぞれ止め穴１９が設けられる。止め穴１９の内径は、閉塞つば１６の内面側より外面側が若干大径に形成される（図３参照）。 The closing collar 16 is provided with retaining holes 19 at five locations sandwiched between the positioning portion 18 and the inner diameter surface 20. The inner diameter of the stop hole 19 is formed so that the outer surface side is slightly larger than the inner surface side of the closing collar 16 (see FIG. 3).

保持器１２は、前記の蓋２２と、この蓋２２の内面に一体に設けられた柱部２３とからなる。蓋２２の外径は前記外輪１１の外径に一致し、内径は軸１５の外径に一致する。蓋２２の内径面２１は軸１５に対するラジアル軸受となる。また、蓋２２の外面には、前記トルク伝達輪１０の一端部の径方向溝１ｂに嵌まり込む突部２２ａが２箇所に設けられ、これらの各突部２２ａがトルク伝達輪１０との連結部となっている。 The cage 12 includes the lid 22 and a column portion 23 provided integrally on the inner surface of the lid 22. The outer diameter of the lid 22 matches the outer diameter of the outer ring 11, and the inner diameter matches the outer diameter of the shaft 15. The inner diameter surface 21 of the lid 22 serves as a radial bearing for the shaft 15. Further, the outer surface of the lid 22 is provided with two protrusions 22 a that fit into the radial grooves 1 b at one end of the torque transmission wheel 10, and these protrusions 22 a are connected to the torque transmission wheel 10. Has become a department.

各柱部２３は、外輪１１の内部にその一方の開放端から挿入され、外輪１１の位置決め部１８に沿わせて周方向の位置決めが行われる。１つのポケット底面１７とその両側の柱部２３、２３とによって１つのポケット２４が区画形成される（図２参照）。図示の場合、ポケット２４は５箇所に形成され、それぞれころ１３が収納される。 Each column portion 23 is inserted into the outer ring 11 from one open end, and is positioned along the positioning portion 18 of the outer ring 11 in the circumferential direction. One pocket 24 is defined by one pocket bottom surface 17 and pillars 23 and 23 on both sides thereof (see FIG. 2). In the case of illustration, the pocket 24 is formed in five places, and the roller 13 is each accommodated.

前記柱部２３の長さは、外輪１１の内部の深さにほぼ一致する（図３参照）。柱部２３の断面形状は、図２に示したように、前記蓋２２の内径面２１に沿った内側面２５と、前記ポケット底面１７の拡大側端部から位置決め部１８に合致する外側面２６を有している。また、周方向の一端面に前記ポケット２４の拡大側を区画する拡大側端面２７が形成され、周方向の他端面に隣接した他のポケット２４の狭小側を区画する狭小側端面２８が形成される。 The length of the column portion 23 substantially matches the depth inside the outer ring 11 (see FIG. 3). As shown in FIG. 2, the cross-sectional shape of the column portion 23 includes an inner surface 25 along the inner diameter surface 21 of the lid 22 and an outer surface 26 that matches the positioning portion 18 from the enlarged side end portion of the pocket bottom surface 17. have. Further, an enlarged side end face 27 that defines the enlarged side of the pocket 24 is formed on one end face in the circumferential direction, and a narrow side end face 28 that defines the narrow side of the other pocket 24 adjacent to the other end face in the circumferential direction is formed. The

前記柱部２３の内側面２５と拡大側端面２７の境界部分がポケット２４の内径側に延び出してころ規制部２９となっている。また、内側面２５と狭小側端面２８の境界部分も前記と反対方向に延び出してころ規制部３１が形成される。両方のころ規制部２９、３１はそれぞれころ１３の直径より小さい間隔で相互に対向し、ころ１３の内径方向への抜け出しを防止する。柱部２３の内側面２５は軸１５に対するラジアル軸受を構成する。 A boundary portion between the inner side surface 25 of the column portion 23 and the enlarged side end surface 27 extends to the inner diameter side of the pocket 24 to form a roller restricting portion 29. Further, the boundary portion between the inner side surface 25 and the narrow side end surface 28 also extends in the opposite direction to form a roller restricting portion 31. Both roller restricting portions 29 and 31 face each other at intervals smaller than the diameter of the roller 13 to prevent the roller 13 from coming out in the inner diameter direction. The inner side surface 25 of the column part 23 constitutes a radial bearing for the shaft 15.

前記柱部２３の先端面に突起３２が設けられる。この突起３２は、前記の止め穴１９を貫通し、その先端が止め穴１９の外方に若干突き出す長さ（図３の一点鎖線参照）に形成される。 A protrusion 32 is provided on the front end surface of the column portion 23. The protrusion 32 penetrates the stop hole 19 and has a length that slightly protrudes outward from the stop hole 19 (see the one-dot chain line in FIG. 3).

図１に示したように、前記柱部２３の拡大側端面２７の先端部は、先端側ほどポケット２４を拡げる方向に傾斜し、かつ先端側ほど狭幅となる傾斜ガイド面３３となっている。また、狭小側端面２８の先端部も、先端側ほどポケット２４を拡げる方向に傾斜する傾斜ガイド面３４となっている。これらの傾斜ガイド面３３、３４の作用により、外輪１１への保持器１２の組み込みを容易に行うことができる。 As shown in FIG. 1, the distal end portion of the enlarged side end surface 27 of the column portion 23 is an inclined guide surface 33 that is inclined in the direction in which the pocket 24 is expanded toward the distal end side and becomes narrower toward the distal end side. . Further, the distal end portion of the narrow side end surface 28 is also an inclined guide surface 34 that is inclined in the direction in which the pocket 24 is expanded toward the distal end side. The cage 12 can be easily incorporated into the outer ring 11 by the action of the inclined guide surfaces 33 and 34.

前記保持器１２の材料としては、射出成形性の点からは熱可塑性樹脂、耐油性確保の点からはＰＯＭ又はＰＰＳ、寸法安定性や耐摩耗性の点からはガラス繊維又はカーボン繊維入り樹脂等を用いることができる。 The material of the cage 12 is thermoplastic resin from the viewpoint of injection moldability, POM or PPS from the viewpoint of ensuring oil resistance, glass fiber or carbon fiber-containing resin from the viewpoint of dimensional stability and wear resistance, etc. Can be used.

付勢ばね１４は、図１に示したように、１枚の金属板によって形成された環状部３５とばね片３６とからなる。環状部３５は、軸１５の周りにすき間をおいて嵌合される内径穴３７を有し、その外周縁部に等間隔をおいて切り起こしにより前記のばね片３６が形成される。 As shown in FIG. 1, the urging spring 14 includes an annular portion 35 and a spring piece 36 formed by a single metal plate. The annular portion 35 has an inner diameter hole 37 fitted with a gap around the shaft 15, and the spring piece 36 is formed by cutting and raising the outer peripheral edge portion at equal intervals.

各ばね片３６は、内径穴３７の接線に平行な切り目３８によって環状部３５から区分され、一端部が環状部３５からの立ち上がり屈曲部３９となり、他端部が自由端部となる。立ち上がり屈曲部３９において直角に屈曲され、中間部をくの字形に屈曲することにより自由端部側を内向きに折り返している。立ち上がり屈曲部３９の基部４０に前記外輪１１のポケット底面１７に接する位置決め突起４１が設けられる。また、前記基部４０に位置決め穴４２が設けられる。 Each spring piece 36 is separated from the annular portion 35 by a notch 38 parallel to the tangent line of the inner diameter hole 37, one end portion is a rising bent portion 39 from the annular portion 35, and the other end portion is a free end portion. It is bent at a right angle at the rising bent portion 39, and the free end portion is folded inward by bending the intermediate portion into a dogleg shape. A positioning protrusion 41 that contacts the pocket bottom surface 17 of the outer ring 11 is provided on the base portion 40 of the rising bent portion 39. A positioning hole 42 is provided in the base 40.

なお、外輪１１の外径面に設けられた軸方向の回り止め溝４４と、保持器１２の蓋２２の外径面に設けられた回り止め溝４５は、組み立て状態において軸方向に揃うようにその位置が定められている。これらの回り止め溝４４、４５は、後述する組み立ての際に外輪１１と保持器１２の位置合わせを行うのに用いることができる。 It should be noted that the axial detent groove 44 provided on the outer diameter surface of the outer ring 11 and the detent groove 45 provided on the outer diameter surface of the lid 22 of the cage 12 are aligned in the axial direction in the assembled state. Its position is defined. These non-rotating grooves 44 and 45 can be used for aligning the outer ring 11 and the cage 12 during assembly described later.

次に、以上のトルク伝達輪１０、外輪１１、保持器１２、ころ１３、及び付勢ばね１４により、実施例１の一方向クラッチを組み立てる手順を説明する。 Next, a procedure for assembling the one-way clutch of the first embodiment using the torque transmission wheel 10, the outer ring 11, the cage 12, the roller 13, and the biasing spring 14 will be described.

まず、外輪１１を保持した状態で、付勢ばね１４を環状部３５側から外輪１１に挿入する。このとき、付勢ばね１４の環状部３５の径方向と周方向の位置決めは、前記基部４０の位置決め突起４１を外輪１１のポケット底面１７の拡大側端部に接触させるとともに、切り目３８を外輪１１内径面に形成された位置決め部１８に沿わせることにより行う。この位置決めにより、付勢ばね１４の位置決め穴４２が閉塞つば１６の止め穴１９に合致する。各ばね片３６は各ポケット２４の拡大側端部に挿入される。その後、各ポケット２４にころ１３を挿入する。ころ１３の脱落を防止するため、適宜な治具が使用される。 First, with the outer ring 11 held, the biasing spring 14 is inserted into the outer ring 11 from the annular portion 35 side. At this time, the annular portion 35 of the urging spring 14 is positioned in the radial direction and the circumferential direction by bringing the positioning protrusion 41 of the base portion 40 into contact with the enlarged side end portion of the pocket bottom surface 17 of the outer ring 11 and the cut 38 is formed in the outer ring 11. This is performed along the positioning portion 18 formed on the inner diameter surface. By this positioning, the positioning hole 42 of the urging spring 14 matches the retaining hole 19 of the closing collar 16. Each spring piece 36 is inserted into the enlarged side end of each pocket 24. Thereafter, the roller 13 is inserted into each pocket 24. In order to prevent the rollers 13 from falling off, an appropriate jig is used.

次に、保持器１２を柱部２３側からポケット２４に挿入する。柱部２３の外側面２６を外輪１１のポケット底面１７の拡大側端部と位置決め部１８に沿わせて挿入することにより、柱部２３の突起３２が付勢ばね１４の位置決め穴４２を通過して止め穴１９に挿通される。このとき、突起３２の先端部は止め穴１９から若干突き出す（図３の一点鎖線参照）。そして、蓋２２の内面を外輪１１の一端面に押し当てた状態で、突起３２の露出端に加熱溶着、熱カシメ等を施し、止め穴１９の拡径部分１９ａに密着した固定部４３を形成する。 Next, the cage 12 is inserted into the pocket 24 from the pillar portion 23 side. By inserting the outer side surface 26 of the column portion 23 along the enlarged side end portion of the pocket bottom surface 17 of the outer ring 11 and the positioning portion 18, the projection 32 of the column portion 23 passes through the positioning hole 42 of the biasing spring 14. And inserted into the stop hole 19. At this time, the tip end of the protrusion 32 slightly protrudes from the stop hole 19 (see the one-dot chain line in FIG. 3). Then, with the inner surface of the lid 22 pressed against one end surface of the outer ring 11, the exposed end of the projection 32 is subjected to heat welding, heat caulking, or the like to form a fixing portion 43 that is in close contact with the enlarged diameter portion 19 a of the retaining hole 19. To do.

前記の固定部４３を形成することにより、柱部２３及びこれと一体の蓋２２からなる保持器１２が外輪１１に固定されて、柱部２３の姿勢が安定し、ポケット２４の形状が正しく保持される。また、軸１５とポケット底面１７にころ１３が接触した状態において生じるクサビ角をδで表すと（図２参照）、保持器１２の柱部２３に支持されたばね片３６でクサビ角δの狭小方向に付勢されるころ１３の動作も安定する。 By forming the fixing portion 43, the retainer 12 including the column portion 23 and the lid 22 integral with the column portion 23 is fixed to the outer ring 11, the posture of the column portion 23 is stabilized, and the shape of the pocket 24 is correctly held. Is done. Further, when the wedge angle generated when the roller 13 is in contact with the shaft 15 and the pocket bottom surface 17 is represented by δ (see FIG. 2), the wedge angle δ is narrowed by the spring piece 36 supported by the pillar portion 23 of the cage 12. The operation of the roller 13 urged by the is also stabilized.

最後に、トルク伝達輪１０及び一体化された外輪１１と保持器１２のセンターに軸１５を挿通して、トルク伝達輪１０の一端部の径方向溝１ｂに蓋２２の外面の突部２２ａを嵌め込む。これにより、トルク伝達輪１０と外輪１１とを一体回転するように軸方向に連結することができる。そして、止め輪９を軸１５の外周に嵌め込んでトルク伝達輪１０及び外輪１１を抜け止めする。 Finally, the shaft 15 is inserted into the center of the torque transmission wheel 10 and the integrated outer ring 11 and the cage 12, and the protrusion 22 a on the outer surface of the lid 22 is inserted into the radial groove 1 b at one end of the torque transmission wheel 10. Fit. Thereby, the torque transmission wheel 10 and the outer ring | wheel 11 can be connected to an axial direction so that it may rotate integrally. Then, the retaining ring 9 is fitted on the outer periphery of the shaft 15 to prevent the torque transmitting wheel 10 and the outer ring 11 from coming off.

この一方向クラッチの動作は、トルク伝達輪１０及び外輪１１が停止している状態において、軸１５がクサビ角δの拡大方向（図２の矢印Ａ参照）に回転した場合、ころ１３がクサビ角δの拡大方向に移動してフリー状態となり、トルクの伝達が遮断される。逆に、軸１５が前記と反対方向に回転した場合は、ころ１３がクサビ角δの狭小方向に移動して噛み込みを生じ、ロック状態となって外輪１１にトルクの伝達が行われ、そのトルクが外輪１１と一体回転するトルク伝達輪１０から外部に伝達される。トルクの伝達がトルク伝達輪１０及び外輪１１から軸１５の方向に行われる場合も、同様のクラッチ動作が行われる。 The operation of the one-way clutch is such that when the torque transmission wheel 10 and the outer ring 11 are stopped, when the shaft 15 rotates in the expansion direction of the wedge angle δ (see arrow A in FIG. 2), the roller 13 It moves in the increasing direction of δ and enters a free state, and torque transmission is interrupted. On the other hand, when the shaft 15 rotates in the opposite direction, the roller 13 moves in the narrow direction of the wedge angle δ and becomes engaged, and is locked and torque is transmitted to the outer ring 11. Torque is transmitted to the outside from the torque transmission wheel 10 that rotates integrally with the outer ring 11. A similar clutch operation is also performed when torque is transmitted in the direction from the torque transmission wheel 10 and the outer ring 11 to the shaft 15.

実施例１の一方向クラッチは、上述したようにトルク伝達輪１０と外輪１１とを一体回転するように軸方向に連結し、トルク伝達輪１０の外径を外輪１１の外径とほぼ同じにしたので、外輪外周にトルク伝達輪を嵌め込んだ従来のものよりも径方向にコンパクト化されたものとなっている。 In the one-way clutch of the first embodiment, as described above, the torque transmission wheel 10 and the outer ring 11 are connected in the axial direction so as to rotate integrally, and the outer diameter of the torque transmission wheel 10 is substantially the same as the outer diameter of the outer ring 11. Therefore, it is more compact in the radial direction than the conventional one in which the torque transmission wheel is fitted on the outer periphery of the outer ring.

また、トルク伝達輪１０のローラ１と保持器１２がいずれも合成樹脂で形成されているので、それぞれの成形形状の自由度が高く、互いの連結部の形状変更も容易である。 In addition, since both the roller 1 and the cage 12 of the torque transmission wheel 10 are made of synthetic resin, the degree of freedom of the respective molding shapes is high, and the shape of the connecting portions can be easily changed.

図４は実施例１の変形例を示す。この変形例では、蓋２２の外周部の内面側と外輪１１の一端面に、回り止め手段として互いに係合する凹部２２ｂと凸部１１ａを５箇所ずつ設けている。これにより、トルク伝達輪１０と外輪１１とが一体回転するときに保持器１２の柱部２３先端側に形成した固定部４３に加わる力を軽減して、固定部４３を破損しにくくすることができる。 FIG. 4 shows a modification of the first embodiment. In this modification, five concave portions 22b and five convex portions 11a are provided on the inner surface side of the outer peripheral portion of the lid 22 and one end surface of the outer ring 11 as engaging means. Thereby, when the torque transmission wheel 10 and the outer ring 11 rotate integrally, the force applied to the fixing portion 43 formed on the distal end side of the column portion 23 of the cage 12 is reduced, and the fixing portion 43 is hardly damaged. it can.

図５及び図６に示す実施例２の一方向クラッチは、実施例１の蓋２２外面の突部２２ａに代えて、外輪１１の閉塞つば１６にトルク伝達輪１０の径方向溝１ｂに嵌まり込む突部１６ａを設けて、これをトルク伝達輪１０との連結部としたものである。 The one-way clutch of the second embodiment shown in FIGS. 5 and 6 is fitted into the radial groove 1b of the torque transmitting wheel 10 on the closing collar 16 of the outer ring 11 instead of the protrusion 22a on the outer surface of the lid 22 of the first embodiment. The protrusion 16a to be inserted is provided, and this is used as a connecting portion with the torque transmission wheel 10.

図７から図１０は実施例３の一方向クラッチを示す。この一方向クラッチは、実施例１の保持器１２の柱部２３に相当する部位を外輪１１の内径面に一体成形してポケット２４を形成し、外輪１１の一方の開放端を閉塞する蓋２２を外輪１１に固定している。また、付勢ばね１４はポケット２４に対応した数のばね片３６で構成され、各ばね片３６が個々にポケット２４に収納されている。その他の部分の構成は、トルク伝達輪１０と蓋２２の互いの連結部を含めて、図１から図３に示した実施例１と同じである。なお、実施例１と同じ機能を有する部材及び部位には、実施例１と同じ符号を付けている。 7 to 10 show the one-way clutch of the third embodiment. In this one-way clutch, a portion corresponding to the pillar portion 23 of the cage 12 of the first embodiment is integrally formed on the inner diameter surface of the outer ring 11 to form a pocket 24, and a lid 22 that closes one open end of the outer ring 11. Is fixed to the outer ring 11. The urging spring 14 includes a number of spring pieces 36 corresponding to the pockets 24, and each spring piece 36 is individually accommodated in the pocket 24. The structure of the other portions is the same as that of the first embodiment shown in FIGS. 1 to 3 including the connecting portion of the torque transmission wheel 10 and the lid 22. Members and parts having the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment.

前記蓋２２の外輪１１に対する固定手段は、外輪１１の外径面にその一端から軸方向に延びる溝４６を複数設け、これらの各軸方向溝４６の他端の底面に係合凹部４７を設けるとともに、蓋２２にその内面から軸方向に延びる腕４８を複数設け、これらの各腕４８の先端部に内向きに突出する係合凸部４９を設けて、蓋２２の各腕４８をそれぞれ外輪１１の軸方向溝４６に嵌め込んで周方向に固定し、各腕４８の係合凸部４９をそれぞれ軸方向溝４６の係合凹部４７に嵌め込んで軸方向に固定するものである。なお、この固定手段により蓋２２を外輪１１に固定する際は、蓋２２を腕４８の先端側で外輪１１の一端側に対向させた状態で軸方向に押圧して、腕４８を外向きにたわませながら外輪１１に嵌め込んでいけばよい。 The means for fixing the lid 22 to the outer ring 11 is provided with a plurality of grooves 46 extending axially from one end thereof on the outer diameter surface of the outer ring 11, and an engaging recess 47 is provided on the bottom surface of the other end of each axial groove 46. In addition, a plurality of arms 48 extending in the axial direction from the inner surface of the lid 22 are provided on the lid 22, and engaging projections 49 projecting inwardly are provided at the distal ends of the arms 48. 11 is fitted in the axial groove 46 and fixed in the circumferential direction, and the engaging projection 49 of each arm 48 is fitted in the engaging recess 47 of the axial groove 46 and fixed in the axial direction. When the cover 22 is fixed to the outer ring 11 by this fixing means, the cover 22 is pressed in the axial direction with the front end side of the arm 48 facing one end side of the outer ring 11, so that the arm 48 faces outward. It is only necessary to fit the outer ring 11 while bending.

図１１に示す実施例４の一方向クラッチは、実施例３の蓋２２外面の突部２２ａに代えて、外輪１１の閉塞つば１６にトルク伝達輪１０の径方向溝１ｂに嵌まり込む突部１６ａを設けて、これをトルク伝達輪１０との連結部としたものである。 The one-way clutch of the fourth embodiment shown in FIG. 11 replaces the protrusion 22a on the outer surface of the lid 22 of the third embodiment, and the protrusion fitted into the radial groove 1b of the torque transmission wheel 10 on the closing collar 16 of the outer ring 11. 16a is provided as a connecting portion with the torque transmission wheel 10.

上述した実施例２から４の一方向クラッチも、実施例１と同様、トルク伝達輪１０の外径が外輪１１の外径とほぼ同じに形成されており、径方向サイズが従来よりもコンパクトなものとなっている。 Similarly to the first embodiment, the one-way clutches of the second to fourth embodiments described above are formed so that the outer diameter of the torque transmission wheel 10 is substantially the same as the outer diameter of the outer ring 11, and the radial size is more compact than before. It has become a thing.

１ローラ
１ｂ径方向溝（連結部）
２ゴム部材
９止め輪
１０トルク伝達輪
１１外輪
１１ａ凸部
１２保持器
１３ころ
１４付勢ばね
１５軸
１６閉塞つば
１６ａ突部（連結部）
１７ポケット底面
１９止め穴
１９ａ拡径部分
２２蓋
２２ａ突部（連結部）
２２ｂ凹部
２３柱部
２４ポケット
３２突起
４３固定部
４６軸方向溝
４７係合凹部
４８腕
４９係合凸部 1 Roller 1b Radial groove (connecting part)
2 Rubber member 9 Retaining ring 10 Torque transmission wheel 11 Outer ring 11a Convex portion 12 Cage 13 Roller 14 Biasing spring 15 Shaft 16 Closure collar 16a
17 Pocket bottom surface 19 Stop hole 19a Expanded portion 22 Lid 22a Protrusion (connecting portion)
22b Recess 23 Column 24 Pocket 32 Protrusion 43 Fixing 46 Axial groove 47 Engaging recess 48 Arm 49 Engaging protrusion

Claims

トルク伝達輪(１０)と、このトルク伝達輪(１０)と一体に回転する外輪(１１)と、この外輪(１１)の内径面に形成された複数のポケット(２４)に収納されたころ(１３)及びこれらの各ころ(１３)の付勢ばね(１４)と、前記外輪(１１)の開放端面の閉塞手段とによって構成され、前記ポケット(２４)の底面(１７)と前記外輪(１１)の中心部に挿通される軸(１５)との間で所定のクサビ角δが形成され、前記付勢ばね(１４)によって前記ころ(１３)をクサビ角δの狭小方向に付勢するようにした一方向クラッチにおいて、前記トルク伝達輪(１０)と外輪(１１)とを軸方向に連結したことを特徴とする一方向クラッチ。 A torque transmission wheel (10), an outer ring (11) rotating integrally with the torque transmission wheel (10), and rollers accommodated in a plurality of pockets (24) formed on the inner diameter surface of the outer ring (11) ( 13) and a biasing spring (14) of each of these rollers (13) and a closing means for the open end surface of the outer ring (11), and a bottom surface (17) of the pocket (24) and the outer ring (11). A predetermined wedge angle δ is formed with the shaft (15) inserted through the central portion of the roller), and the roller (13) is urged in the narrow direction of the wedge angle δ by the urging spring (14). In the one-way clutch, the torque transmission wheel (10) and the outer ring (11) are connected in the axial direction.

前記外輪(１１)の一方の開放端面の閉塞手段が、前記外輪(１１)の一端部に設けられた内向きの閉塞つば(１６)であり、この閉塞つば(１６)と前記トルク伝達輪(１０)とに、互いを一体回転するように連結する連結部を設けたことを特徴とする請求項１に記載の一方向クラッチ。 The closing means on one open end surface of the outer ring (11) is an inward closing collar (16) provided at one end of the outer ring (11). The closing collar (16) and the torque transmitting wheel ( The one-way clutch according to claim 1, further comprising a connecting part that connects the two parts so as to rotate together.

前記外輪(１１)の一方の開放端面の閉塞手段が、前記外輪(１１)に固定される蓋(２２)であり、この蓋(２２)と前記トルク伝達輪(１０)とに、互いを一体回転するように連結する連結部を設けたことを特徴とする請求項１に記載の一方向クラッチ。 The closing means of one open end surface of the outer ring (11) is a lid (22) fixed to the outer ring (11), and the lid (22) and the torque transmission wheel (10) are integrated with each other. The one-way clutch according to claim 1, further comprising a connecting portion that is connected to rotate.

前記蓋(２２)が合成樹脂で形成されていることを特徴とする請求項３に記載の一方向クラッチ。 The one-way clutch according to claim 3, wherein the lid (22) is made of a synthetic resin.

前記蓋(２２)の外輪(１１)に対する固定手段が、前記外輪(１１)の外径面にその一端から軸方向に延びる溝(４６) を設け、この軸方向溝(４６)の底面に係合凹部(４７)を設けるとともに、前記蓋(２２)にその内面から軸方向に延びる腕(４８) を設け、この腕(４８)の先端側に内向きに突出する係合凸部(４９) を設けて、前記腕(４８) を前記軸方向溝(４６)に嵌め込んで周方向に固定し、前記係合凸部(４９)を前記係合凹部(４７)に嵌め込んで軸方向に固定するものであることを特徴とする請求項４に記載の一方向クラッチ。 The fixing means for the outer ring (11) of the lid (22) is provided with a groove (46) extending in the axial direction from one end thereof on the outer diameter surface of the outer ring (11), and is engaged with the bottom surface of the axial groove (46). A joint recess (47) is provided, and an arm (48) extending axially from the inner surface of the lid (22) is provided, and an engagement protrusion (49) projecting inwardly toward the distal end side of the arm (48). The arm (48) is fitted in the axial groove (46) and fixed in the circumferential direction, and the engaging convex part (49) is fitted in the engaging concave part (47) in the axial direction. The one-way clutch according to claim 4, wherein the one-way clutch is fixed.

前記外輪(１１)の他方の開放端面の閉塞手段が、前記外輪(１１)の他端部に設けられた内向きの閉塞つば(１６)であり、前記外輪(１１)のポケット(２４)は、前記ポケット底面(１７)とこのポケット底面(１７)の周方向の両側に挿入された柱部(２３)とによって区画形成され、前記各柱部(２３)の基部を前記蓋(２２)に一体化することにより保持器(１２)が構成され、前記保持器(１２)の外輪(１１)に対する固定手段は、前記各柱部(２３)の先端部を前記閉塞つば(１６)に固定するものであることを特徴とする請求項３または４に記載の一方向クラッチ。 The closing means on the other open end surface of the outer ring (11) is an inward closing collar (16) provided at the other end of the outer ring (11), and the pocket (24) of the outer ring (11) is The pocket bottom surface (17) and the column portions (23) inserted on both sides of the pocket bottom surface (17) in the circumferential direction are partitioned, and the base portion of each column portion (23) is used as the lid (22). The retainer (12) is configured by integrating, and the fixing means for the outer ring (11) of the retainer (12) fixes the tip end portion of each pillar portion (23) to the closed collar (16). The one-way clutch according to claim 3 or 4, wherein the one-way clutch.

前記各柱部(２３)の先端に突起(３２)が設けられ、前記閉塞つば(１６)に設けられた止め穴(１９)に前記突起(３２)を挿入固定したことを特徴とする請求項６に記載の一方向クラッチ。 A protrusion (32) is provided at the tip of each column portion (23), and the protrusion (32) is inserted and fixed in a retaining hole (19) provided in the closing collar (16). The one-way clutch according to claim 6.

前記止め穴(１９)の外端部に拡径部分(１９ａ)が設けられ、前記突起(３２)の先端部を熱変形によって拡大させ、前記拡径部分(１９ａ)に充填することにより前記保持器(１２)の固定部(４３)を形成したことを特徴とする請求項７に記載の一方向クラッチ。 A diameter-enlarged portion (19a) is provided at the outer end of the retaining hole (19), the tip of the projection (32) is enlarged by thermal deformation, and the diameter-enlarged portion (19a) is filled with the holding portion. The one-way clutch according to claim 7, wherein a fixing part (43) of the device (12) is formed.

前記蓋(２２)と外輪(１１)とに、互いの回り止め手段を設けたことを特徴とする請求項６から８のいずれかに記載の一方向クラッチ。 The one-way clutch according to any one of claims 6 to 8, characterized in that the lid (22) and the outer ring (11) are provided with mutual rotation preventing means.

前記トルク伝達輪(１０)が合成樹脂で形成されていることを特徴とする請求項１から９のいずれかに記載の一方向クラッチ。 The one-way clutch according to any one of claims 1 to 9, wherein the torque transmission wheel (10) is made of a synthetic resin.