JPH11280795A - Retainer for one way clutch, and one way clutch using the same - Google Patents
Retainer for one way clutch, and one way clutch using the sameInfo
- Publication number
- JPH11280795A JPH11280795A JP10080996A JP8099698A JPH11280795A JP H11280795 A JPH11280795 A JP H11280795A JP 10080996 A JP10080996 A JP 10080996A JP 8099698 A JP8099698 A JP 8099698A JP H11280795 A JPH11280795 A JP H11280795A
- Authority
- JP
- Japan
- Prior art keywords
- retainer
- way clutch
- roller
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一方向クラッチ用
の保持器ならびにそれを用いた一方向クラッチに関す
る。一方向クラッチは、種々な機能装置の送り機構の
他、自動車などのエンジンのクランクシャフトからベル
トを介して駆動される補機に装備するプーリなどに内蔵
される。前述の補機としては、例えば自動車のエアコン
ディショナ用コンプレッサ、ウォーターポンプ、オルタ
ーネータ、冷却ファン、クランクプーリなどが挙げられ
る。The present invention relates to a retainer for a one-way clutch and a one-way clutch using the same. The one-way clutch is built in a feed mechanism of various functional devices, a pulley mounted on an auxiliary machine driven via a belt from a crankshaft of an engine of an automobile or the like, and the like. Examples of the aforementioned auxiliary equipment include a compressor for an air conditioner of an automobile, a water pump, an alternator, a cooling fan, a crank pulley, and the like.
【０００２】[0002]
【従来の技術】一方向クラッチでは、内外２つの環体間
の径方向対向空間の円周数カ所にくさび状空間が設けら
れ、このくさび状空間にくさび部材としてのころが配置
され、内外の環体の速度差に応じてころがくさび状空間
の狭い側（ロック側）や広い側（フリー側）に転動し
て、内外２つの環体を同期回転させて動力を伝達する状
態や、相対回転させて動力伝達を遮断する状態に切り替
わるようになっている。2. Description of the Related Art In a one-way clutch, a wedge-shaped space is provided at several places around a radially opposed space between two inner and outer rings, and rollers serving as wedge members are disposed in the wedge-shaped space. Rolling to the narrow side (lock side) or wide side (free side) of the wedge-shaped space according to the speed difference of the body, transmitting the power by synchronously rotating the two inner and outer rings, The power transmission is switched to a state in which the power transmission is cut off by rotating.
【０００３】具体的に、従来の一方向クラッチを、図１
１ないし図１４に示して説明する。図１１は、一方向ク
ラッチの上半分を断面にした側面図、図１２は、図１１
の（１２）−（１２）線断面の矢視図、図１３は、保持
器のポケット部分の平面展開図、図１４は、ころを傾け
た状態を示す説明図である。図中、８０は内輪、８１は
外輪、８２は保持器、８３はころ、８４はコイルバネで
ある。[0003] Specifically, a conventional one-way clutch is shown in FIG.
This will be described with reference to FIGS. FIG. 11 is a side view in which the upper half of the one-way clutch is sectioned, and FIG.
13 is a plan view of a pocket portion of the retainer, and FIG. 14 is an explanatory view showing a state in which the rollers are inclined. In the figure, 80 is an inner ring, 81 is an outer ring, 82 is a cage, 83 is a roller, and 84 is a coil spring.
【０００４】外輪８１の内周面の円周数カ所には、径方
向外向きに凹む凹曲面からなるカム面８１ａが形成され
ており、このカム面８１ａと内輪８０の外周面との間で
くさび状空間を形成するようになっている。A plurality of cam surfaces 81a each having a concave curved surface which is concave outward in the radial direction are formed at several places on the inner peripheral surface of the outer ring 81. A wedge is formed between the cam surface 81a and the outer peripheral surface of the inner ring 80. A space is formed.
【０００５】保持器８２は、その円周数カ所に径方向内
外に貫通する孔からなるポケット８２ａを有しており、
このポケット８２ａにころ８３およびコイルバネ８４が
各々１つずつ収納される。この保持器８２のポケット８
２ａの位置と、外輪８１のカム面８５の位置とを対応配
置させて固定する必要があるために、保持器８２を内輪
８０の外周面に対して圧入により固定させている。[0005] The retainer 82 has pockets 82a each formed of a hole penetrating inward and outward in the radial direction at several places on its circumference.
One roller 83 and one coil spring 84 are stored in the pocket 82a. Pocket 8 of this cage 82
Since the position 2a and the position of the cam surface 85 of the outer ring 81 need to be arranged and fixed correspondingly, the retainer 82 is fixed to the outer peripheral surface of the inner ring 80 by press fitting.
【０００６】ところで、上記一方向クラッチでは、ころ
８３に対してモーメント荷重が作用するようなことがあ
ると、ころ８３の姿勢が斜めに傾く、いわゆるスキュー
現象が起こる。In the one-way clutch, when a moment load acts on the rollers 83, the attitude of the rollers 83 is inclined, that is, a so-called skew phenomenon occurs.
【０００７】そこで、ころ８３を保持器８２のポケット
８２ａに収納することにより、ころ８３のスキューを物
理的に規制している。つまり、ころ８３が傾くと、図１
４に示すように、ころ８３の端面の周縁においてころ８
３それぞれの中心を結ぶ円（ＰＣＤ）上の１点Ｐ１が壁
部８２ｂ，８２ｂの内面に対して当接し、そこでころ８
３の傾きを制止する。それゆえ、ころ８３の軸方向両端
面と保持器８２の壁部８２ｂ，８２ｂ内面との間の軸方
向隙間Ｗを小さくすれば、ころ８３の傾き許容角度θ２
を小さくできる。Therefore, the skew of the rollers 83 is physically restricted by storing the rollers 83 in the pockets 82a of the retainer 82. That is, when the roller 83 is tilted, FIG.
As shown in FIG.
3. A point P1 on a circle (PCD) connecting the centers of the three points abuts against the inner surfaces of the walls 82b, 82b.
Stop the tilt of 3. Therefore, if the axial gap W between the axial end surfaces of the rollers 83 and the inner surfaces of the walls 82b and 82b of the cage 82 is reduced, the inclination allowable angle θ2 of the rollers 83 can be reduced.
Can be reduced.
【０００８】従来では、ころ８３のスキューを防ぐこと
が重要と考えていたので、前記軸方向隙間Ｗをできるだ
け小さく設計する傾向になっていた。Conventionally, it has been considered important to prevent the skew of the rollers 83, so that the axial gap W has been designed to be as small as possible.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、ころ８
３のスキューが頻繁に発生するような場合には、保持器
８２の破損寿命が短くなることが判った。However, the roller 8
When the skew of No. 3 occurs frequently, it was found that the life of the cage 82 was shortened.
【００１０】その原因を説明する。ころ８３がスキュー
すると、ころ８３の軸方向両端面が保持器８２の壁部８
２ｂ，８２ｂに対して強く押し付けられるために、保持
器８２の壁部８２ｂ，８２ｂと柱部８２ｃとの境に対し
て引張応力が作用することになる。ここで、スキューが
頻繁に発生すると、前述した特定箇所に引張応力が繰り
返し作用することになるため、そこが疲労破損するおそ
れがある。The cause will be described. When the rollers 83 are skewed, both end faces in the axial direction of the rollers 83 are
Since it is strongly pressed against 2b, 82b, tensile stress acts on the boundary between the wall portions 82b, 82b of the retainer 82 and the column portion 82c. Here, if the skew occurs frequently, the tensile stress repeatedly acts on the above-mentioned specific portion, and there is a possibility that the specific portion may be damaged by fatigue.
【００１１】特に、従来例のように軸方向隙間Ｗを小さ
く詰めている場合、ころ８３が僅かに傾いただけでも、
すぐにころ８３が壁部８２ｂ，８２ｂの内面に対して当
接するようになる。換言すれば、ころ８３が僅かに傾い
ただけで、前述した特定箇所に引張応力が即座に作用す
る結果になっているのである。In particular, when the axial gap W is narrowed as in the conventional example, even if the roller 83 is slightly inclined,
Immediately, the rollers 83 come into contact with the inner surfaces of the walls 82b, 82b. In other words, only a slight inclination of the roller 83 results in the instantaneous application of the tensile stress to the above-described specific portion.
【００１２】これに対して、ころ８３の傾き許容角度θ
２を大きく、つまり、ころ８３と壁部８２ｂ，８２ｂと
の間の軸方向隙間Ｗを大きくすれば、ころ８３が僅かに
傾いただけでは、ころ８３が壁部８２ｂ，８２ｂ内面に
押し付けられることを防げるので、保持器８２の破損寿
命を延ばせると言える。On the other hand, the inclination allowable angle θ of the roller 83 is
2 is increased, that is, if the axial gap W between the roller 83 and the wall portions 82b, 82b is increased, the roller 83 can be pressed against the inner surfaces of the wall portions 82b, 82b only by slightly tilting the roller 83. Since it can be prevented, the life of the cage 82 can be extended.
【００１３】しかしながら、保持器８２の全幅寸法が制
約されるような場合において、前述したように軸方向隙
間Ｗを大きく設定すると、必然的に壁部８２ｂ，８２ｂ
の幅寸法が小さくなってしまうために、著しい強度低下
につながる。However, in the case where the entire width of the retainer 82 is restricted, if the axial gap W is set large as described above, the walls 82b, 82b
Since the width dimension becomes small, the strength is significantly reduced.
【００１４】したがって、本発明は、一方向クラッチに
用いられる保持器において、強度低下を抑制しながら、
ころの傾き許容角度を可及的に大きくできるような構造
とし、破損寿命を延ばせるようにすることを目的として
いる。Therefore, the present invention provides a cage for use in a one-way clutch while suppressing a decrease in strength.
An object of the present invention is to provide a structure in which the permissible angle of inclination of the rollers can be made as large as possible, and to extend the life of breakage.
【００１５】[0015]
【課題を解決するための手段】本発明の請求項１の一方
向クラッチ用の保持器は、内外２つの環体の径方向対向
空間に介装されるとともに一方環体の周面に嵌合固定さ
れ、かつ円周数カ所に径方向内外に貫通するころ収納用
のポケットを有するもので、前記ポケットの軸方向両端
の壁部の内面が、各壁部の幅寸法（軸方向寸法）を一方
環体に対する嵌合部位側から他方環体側へ向けて漸次幅
狭とするようなテーパ状に形成されている。According to the present invention, a retainer for a one-way clutch according to the present invention is interposed in a radially opposed space between two inner and outer rings and is fitted to a peripheral surface of one of the rings. The pocket has a pocket for accommodating a roller that is fixed and penetrates radially inward and outward at several locations around the circumference, and the inner surfaces of the walls at both ends in the axial direction of the pocket have the width dimension (axial dimension) of each wall part. It is formed in a tapered shape such that the width gradually decreases from the fitting portion side to the ring body toward the other ring body side.
【００１６】本発明の請求項２の一方向クラッチ用の保
持器は、内外２つの環体の径方向対向空間に介装される
とともに内側環体の外周面に嵌合固定され、かつ円周数
カ所に径方向内外に貫通するころ収納用のポケットを有
するもので、前記ポケットの軸方向両端の壁部の内面
が、各壁部の幅寸法（軸方向寸法）を外径側へ向けて漸
次幅狭とするようなテーパ状に形成されている。According to a second aspect of the present invention, a retainer for a one-way clutch is interposed in a radially opposed space between two inner and outer rings, is fitted and fixed to an outer peripheral surface of an inner ring, and has a circumference. It has pockets for accommodating rollers that penetrate radially inward and outward in several places, and the inner surfaces of the walls at both ends in the axial direction of the pocket gradually increase the width dimension (axial dimension) of each wall toward the outer diameter side. It is formed in a tapered shape to reduce the width.
【００１７】本発明の請求項３の一方向クラッチ用の保
持器は、上記請求項１または２において、前記ポケット
の軸方向両側の壁部の内面において径方向全領域がテー
パ状に形成されている。According to a third aspect of the present invention, there is provided a cage for a one-way clutch according to the first or second aspect, wherein the entire radial area is formed in a tapered shape on the inner surfaces of the axially opposite side walls of the pocket. I have.
【００１８】本発明の請求項４の一方向クラッチ用の保
持器は、上記請求項２において、前記ポケットの軸方向
両側の壁部の外径寸法が、各ポケットに収納されるころ
それぞれの中心を結ぶ円の径寸法よりも小さく設定さ
れ、かつ、この壁部の内面において径方向途中から外径
端縁までの領域がテーパ状に形成されている。According to a fourth aspect of the present invention, there is provided a cage for a one-way clutch according to the second aspect, wherein the outer diameters of the wall portions on both sides in the axial direction of the pocket are adjusted so that the center of each roller is accommodated in each pocket. Is set smaller than the diameter of a circle connecting the circles, and a region from the middle in the radial direction to the outer diameter end edge is formed in a tapered shape on the inner surface of the wall portion.
【００１９】本発明の請求項５の一方向クラッチは、同
心状に配設される内外２つの環体を同期回転させるロッ
ク状態と相対回転させるフリー状態とに切り換えるもの
で、前記２つの環体の間に介装されかつくさび部材とし
てのころを周方向転動可能に保持する保持器として、上
記請求項１ないし４のいずれかに記載の保持器が用いら
れている。According to a fifth aspect of the present invention, the one-way clutch switches between a locked state in which the two inner and outer rings arranged concentrically are synchronously rotated and a free state in which the two rings are relatively rotated. The retainer according to any one of claims 1 to 4 is used as a retainer interposed between the retainers and rotatably holding a roller as a wedge member in a circumferential direction.
【００２０】本発明の請求項６の一方向クラッチは、同
心状に配設される内外２つの環体と、内外いずれか一方
の環体の周面の円周数カ所に設けられて他方の環体の対
向周面との間でくさび状空間を形成するカム面と、前記
各くさび状空間に１つずつ配置されてロック位置とフリ
ー位置との間で転動変位して状態を切り換えるくさび部
材としてのころと、前記各くさび状空間において前記こ
ろと周方向隣り合わせに収納されかつころをくさび状空
間の狭い側へ弾発付勢する弾発付勢手段と、前記２つの
環体の間に介装されかつ前記カム面に対応する円周数カ
所に前記ころおよび弾発付勢手段が収納されるポケット
を有する保持器とを備え、前記保持器として、上記請求
項１ないし４のいずれかに記載の保持器が用いられてい
る。According to a sixth aspect of the present invention, there is provided a one-way clutch, wherein two inner and outer rings are arranged concentrically, and the other ring is provided at several places on the circumferential surface of one of the inner and outer rings. A cam surface forming a wedge-shaped space between the opposing peripheral surfaces of the body, and a wedge member disposed one by one in each of the wedge-shaped spaces to switch the state by rolling and displacing between a locked position and a free position. And a resilient biasing means that is housed adjacent to the roller in the circumferential direction in each of the wedge-shaped spaces and that resiliently biases the roller toward a narrow side of the wedge-shaped space; And a cage having pockets in which the rollers and the resilient urging means are housed at several places on the circumference corresponding to the cam surface, wherein the cage is provided as any of the above-mentioned claims. The retainer described is used.
【００２１】以上、本発明の保持器のように、ポケット
の軸方向両側の壁部の内面をテーパ状とすれば、ころを
傾かせたときに、ころの端面の周縁においてころそれぞ
れの中心を結ぶ円（ＰＣＤ）上の１点が壁部のテーパ状
内面に対して当接せずに、それ以外の部位が当接するこ
とになる。この現象により、結果的にころの傾き許容角
度が従来例に比べて大きくなるので、ころが頻繁に傾く
ような状況になっても、ころが僅かに傾いただけでは、
言い換えればころが大きく傾かない限り、ころが壁部に
当接せずに済むようになる。そのため、保持器のポケッ
トの軸方向両側の壁部とポケットの周方向両側の柱部と
の境に対して引張応力が頻繁に作用することがなくな
る。As described above, if the inner surfaces of the wall portions on both sides in the axial direction of the pocket are tapered as in the cage of the present invention, when the rollers are inclined, the center of each roller is located at the peripheral edge of the roller end face. One point on the connecting circle (PCD) does not come into contact with the tapered inner surface of the wall, but the other parts come into contact. Due to this phenomenon, as a result, the permissible angle of inclination of the rollers becomes larger than that of the conventional example. Therefore, even in a situation where the rollers are frequently inclined, if the rollers are only slightly inclined,
In other words, as long as the rollers do not tilt significantly, the rollers do not have to contact the wall. Therefore, tensile stress does not frequently act on the boundary between the wall portions on both axial sides of the pocket of the cage and the pillar portions on both circumferential sides of the pocket.
【００２２】なお、壁部のテーパ状内面の傾き方向は、
保持器を内外どちらの環体に固定するかによって決ま
る。例えば内側環体に固定する場合、壁部のテーパ状内
面の傾きは、壁部の幅寸法（軸方向寸法）を外径側へ向
けて幅狭とする形状となり、また、外側環体に固定する
場合、壁部の幅寸法を内径側へ向けて幅狭とする形状と
なる。The inclination direction of the tapered inner surface of the wall is
It depends on whether the cage is fixed to the inner or outer ring. For example, when fixing to the inner ring, the inclination of the tapered inner surface of the wall portion is such that the width (axial dimension) of the wall portion becomes narrower toward the outer diameter side, and the wall is fixed to the outer ring. In this case, the width of the wall is narrowed toward the inner diameter side.
【００２３】つまり、壁部の幅寸法（軸方向寸法）は、
内径側（または外径側）において大きく外径側（または
内径側）において小さくなっているため、当該壁部にお
いて幅広側でのころとの軸方向隙間を従来例と同一に設
定した場合だと、前記壁部の断面積が、従来例において
軸方向隙間を小さくする場合に比べると小さくなるもの
の、従来例において軸方向隙間を大きくする場合に比べ
れば大きくできるので、結果的に保持器の著しい強度低
下が抑制されることになる。That is, the width dimension (axial dimension) of the wall is
Since it is large on the inner diameter side (or outer diameter side) and smaller on the outer diameter side (or inner diameter side), it is assumed that the axial gap between the roller on the wide side and the wall is set to be the same as the conventional example. Although the cross-sectional area of the wall portion is smaller than the case where the axial gap is reduced in the conventional example, it can be larger than the case where the axial gap is increased in the conventional example. The decrease in strength is suppressed.
【００２４】[0024]
【発明の実施の形態】本発明の詳細を図１ないし図１０
に示す実施形態に基づいて説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Description will be made based on the embodiment shown in FIG.
【００２５】図１ないし図４は本発明の実施形態１にか
かり、図１は、一方向クラッチの上半分を断面にした側
面図、図２は、図１の（２）−（２）線断面の矢視図、
図３は、保持器のポケット部分の平面展開図、図４は、
図２においてころを傾けた状態を示す説明図である。FIGS. 1 to 4 relate to the first embodiment of the present invention. FIG. 1 is a side view in which the upper half of the one-way clutch is sectioned, and FIG. 2 is a line (2)-(2) in FIG. Arrow view of the cross section,
FIG. 3 is a developed plan view of the pocket portion of the retainer, and FIG.
FIG. 3 is an explanatory diagram showing a state in which rollers are inclined in FIG. 2.
【００２６】図中、Ａは一方向クラッチの全体を示して
いる。この一方向クラッチＡは、内輪１、外輪２、保持
器３、ころ４、コイルバネ５を備えている。動作として
は、内輪１と外輪２との回転差に応じて、ころ４が転動
して内・外輪１，２を同期回転させて動力を伝達する状
態や、相対回転させて動力伝達を遮断する状態に切り替
わるようになっている。In the figure, A indicates the entire one-way clutch. The one-way clutch A includes an inner ring 1, an outer ring 2, a retainer 3, a roller 4, and a coil spring 5. The operation is such that the rollers 4 roll according to the rotation difference between the inner ring 1 and the outer ring 2 to synchronously rotate the inner and outer rings 1 and 2 to transmit power, or the relative rotation to cut off power transmission. It is switched to the state to do.
【００２７】以下、上記各構成要素を詳細に説明する。Hereinafter, each of the above components will be described in detail.
【００２８】内輪１は、内外周面ともに円筒形に形成さ
れている。The inner ring 1 is formed in a cylindrical shape on both the inner and outer peripheral surfaces.
【００２９】外輪２は、その内周面の円周数カ所に周方
向に湾曲する凹曲面からなるカム面６が設けられてい
る。この外輪２は、内輪１の外周に所要対向空間を介し
て同心状に配設されるものであり、この外輪２のカム面
６と内輪１の外周面とでくさび状空間が形成される。こ
の外輪２の一端面の１８０度対向する２カ所には、スリ
ット状の切欠き２ａ，２ａが設けられている。The outer ring 2 is provided with a cam surface 6 having a concave curved surface which is curved in the circumferential direction at several places on the inner peripheral surface of the outer race 2. The outer ring 2 is disposed concentrically on the outer periphery of the inner ring 1 via a required facing space, and a wedge-shaped space is formed by the cam surface 6 of the outer ring 2 and the outer peripheral surface of the inner ring 1. Slit-shaped notches 2a, 2a are provided at two places on one end face of the outer ring 2 which are opposed by 180 degrees.
【００３０】保持器３は、内・外輪１，２間に介装され
て外輪２の内周面に嵌合されるもので、外輪２のカム面
６に対応する位置に径方向内外に貫通するポケット３ａ
が設けられている。この保持器３のポケット３ａの軸方
向一側の壁部３ｂの内周面において１８０度対向する２
カ所には、外輪２の切欠き２ａ，２ａに対して圧入嵌合
される突片３ｃ，３ｃが設けられており、切欠き２ａ，
２ａに対する突片３ｃ，３ｃの嵌合により、保持器３が
外輪２に対して周方向ならびに軸方向に位置決めされて
いる。The retainer 3 is interposed between the inner and outer rings 1 and 2 and fitted to the inner peripheral surface of the outer ring 2, and penetrates radially inward and outward at a position corresponding to the cam surface 6 of the outer ring 2. Pocket 3a
Is provided. Opposite by 180 degrees on the inner peripheral surface of the wall 3b on one axial side of the pocket 3a of the cage 3
Projections 3c, 3c press-fit into the notches 2a, 2a of the outer race 2 are provided at the two places.
The retainer 3 is positioned in the circumferential direction and the axial direction with respect to the outer ring 2 by the fitting of the protruding pieces 3c, 3c to the outer ring 2a.
【００３１】ころ４は、保持器３のポケット３ａに１つ
ずつ周方向転動可能に収納された状態で、内輪１の外周
面と外輪２のカム面６との間に形成されるくさび状空間
に配置されている。The rollers 4 are wedge-shaped formed between the outer peripheral surface of the inner race 1 and the cam surface 6 of the outer race 2 in a state in which the rollers 4 are accommodated one by one in the pockets 3a of the cage 3 so as to be able to roll in the circumferential direction. It is arranged in space.
【００３２】コイルバネ５は、保持器３の各ポケット３
ａに１つずつ圧縮状態で収納されており、その伸張復元
力でころ４をくさび状空間の狭い側（ロック側）へ弾発
付勢する。このコイルバネ５は、バネ線材を長方形に巻
回した角巻きバネとされており、保持器３のポケット３
ａの内面に一体形成される突起３ｄに対して外嵌装着さ
れている。The coil spring 5 is provided in each pocket 3 of the holder 3.
a is stored one by one in the compressed state, and the roller 4 is elastically urged toward the narrow side (lock side) of the wedge-shaped space by the expansion restoring force. The coil spring 5 is a rectangular spring formed by winding a spring wire in a rectangular shape.
It is externally fitted to the projection 3d integrally formed on the inner surface of the portion a.
【００３３】次に、本発明の特徴について説明する。保
持器３のポケット３ａの軸方向両側の壁部３ｂ，３ｂの
内面において径方向全領域が外径側から内径側へ向けて
傾斜するテーパ状に形成されている。つまり、両壁部３
ｂ，３ｂの幅寸法（軸方向寸法）が外径側から内径側に
向けて漸次幅狭となるように設定されており、両壁部３
ｂ，３ｂ間の間隔が外径側から内径側へ向けて漸次拡が
っている。そして、壁部３ｂ，３ｂのテーパ状内面にお
いて外径端からころ４の端面までの軸方向隙間Ｗは、従
来例と同じ寸法に設定されている。Next, the features of the present invention will be described. On the inner surfaces of the walls 3b, 3b on both sides in the axial direction of the pocket 3a of the retainer 3, the entire radial region is formed in a tapered shape inclined from the outer diameter side to the inner diameter side. That is, both wall portions 3
The width dimension (axial dimension) of b, 3b is set so as to gradually decrease from the outer diameter side to the inner diameter side.
The interval between b and 3b gradually increases from the outer diameter side to the inner diameter side. The axial gap W from the outer diameter end to the end face of the roller 4 on the tapered inner surfaces of the walls 3b, 3b is set to the same size as the conventional example.
【００３４】このようにポケット３ａの軸方向両側の壁
部３ｂ，３ｂの内面をテーパ状とすれば、図４に示すよ
うに、ころ４が傾いたときに、ころ４の端面の周縁にお
いて外輪２寄りの周縁の１点Ｐ２が壁部３ｂ，３ｂのテ
ーパ状内面の外径側に対して当接することになり、ころ
４の端面の周縁においてころ４それぞれの中心を結ぶ円
（ＰＣＤ）上の１点Ｐ１は、壁部３ｂ，３ｂのテーパ状
内面に対して当接しなくなる。If the inner surfaces of the walls 3b, 3b on both sides in the axial direction of the pocket 3a are tapered, as shown in FIG. 4, when the roller 4 is inclined, the outer ring is formed at the peripheral edge of the end surface of the roller 4. One point P2 of the peripheral edge closer to 2 comes into contact with the outer diameter side of the tapered inner surface of the wall portions 3b, 3b, and a circle (PCD) connecting the centers of the rollers 4 at the peripheral edge of the roller 4 at the peripheral surface. The point P1 does not come into contact with the tapered inner surfaces of the walls 3b, 3b.
【００３５】この現象により、結果的にころ４の傾き許
容角度θ１を、従来例に比べて大きくできるようになる
ので、ころ４が頻繁に傾くような場合であっても、ころ
４が僅かに傾いただけでは、言い換えればころ４が大き
く傾かない限り、ころ４が壁部３ｂ，３ｂに当接せずに
済むことになる。そのため、保持器３のポケット３ａの
軸方向両側の壁部３ｂ，３ｂとポケット３ａの周方向両
側の柱部３ｅとの境に対して引張応力が頻繁に作用する
ことがなくなり、保持器３の破損寿命が延びる結果とな
る。As a result of this phenomenon, the allowable inclination angle θ1 of the rollers 4 can be increased as compared with the conventional example. Therefore, even if the rollers 4 are frequently inclined, the rollers 4 are slightly inclined. With only the inclination, in other words, as long as the rollers 4 are not largely inclined, the rollers 4 do not have to come into contact with the walls 3b, 3b. Therefore, tensile stress does not frequently act on the boundary between the walls 3b, 3b on both sides in the axial direction of the pocket 3a of the cage 3 and the pillars 3e on both sides in the circumferential direction of the pocket 3a. The result is an increased failure life.
【００３６】そして、上述したように、ポケット３ａの
軸方向両側の壁部３ｂ，３ｂの幅寸法（軸方向寸法）
は、外径側において大きく内径側において小さくなって
いるため、外径側でのころ４との軸方向隙間Ｗを従来例
と同一に設定した場合だと、壁部３ｂ，３ｂの断面積
が、従来例において軸方向隙間Ｗを小さくする場合に比
べると小さくなるものの、従来例において軸方向隙間Ｗ
を大きくする場合に比べれば大きくできるので、保持器
３の著しい強度低下が抑制されることになる。As described above, the width (axial dimension) of the walls 3b, 3b on both sides in the axial direction of the pocket 3a.
Is larger on the outer diameter side and smaller on the inner diameter side, and when the axial gap W with the roller 4 on the outer diameter side is set to be the same as that of the conventional example, the cross-sectional area of the walls 3b, 3b becomes smaller. Although it is smaller than the case where the axial gap W is reduced in the conventional example, the axial gap W is small in the conventional example.
Can be made larger than in the case where the size of the cage 3 is increased, so that the remarkable decrease in the strength of the cage 3 is suppressed.
【００３７】なお、本発明は上記実施形態１のみに限定
されるものではなく、種々な応用や変形が考えられる。The present invention is not limited to the first embodiment, and various applications and modifications are conceivable.
【００３８】（１） 上記実施形態１において、壁部３
ｂ，３ｂのテーパ状内面の傾き角度は適宜設定すればよ
い。例えば、壁部３ｂ，３ｂのテーパ状内面の傾きを徐
々に大きくすると、図５に示すように、壁部３ｂ，３ｂ
に対するころ４の端面の当接位置を、ころ４の端面の周
縁において外輪２寄りに近づけることができ、傾き許容
角度θ１を一層大きくできるようになる。但し、この場
合、壁部３ｂ，３ｂの断面積が徐々に小さくなるので、
強度面で不利になるが、保持器３全体の幅寸法が制約さ
れないような状況では、上述したようにテーパ状内面の
傾斜角を大きくしても壁部３ｂの幅寸法を大きく確保す
ることができるから、問題ない。(1) In the first embodiment, the wall 3
The inclination angles of the tapered inner surfaces b and 3b may be set as appropriate. For example, when the inclination of the tapered inner surfaces of the walls 3b, 3b is gradually increased, as shown in FIG.
Can be brought closer to the outer ring 2 at the peripheral edge of the end surface of the roller 4, and the allowable inclination angle θ1 can be further increased. However, in this case, since the cross-sectional area of the walls 3b, 3b gradually decreases,
Although it is disadvantageous in terms of strength, in a situation where the width of the entire retainer 3 is not restricted, it is possible to secure a large width of the wall 3b even if the inclination angle of the tapered inner surface is increased as described above. No problem because you can.
【００３９】（２） 上記実施形態１では、外輪２にカ
ム面６を設けた例を挙げているが、図６ないし図９に示
す実施形態２のように、内輪１の外周面にカム面６を設
けるようにしてもよい。この実施形態２では、ころ４に
作用する回転遠心力を外輪１の円筒形内周面で受けるこ
とができるから、ころ４に作用する回転遠心力がころ４
を周方向に動かす力として作用しなくなり、ころ４の挙
動が安定する。なお、この実施形態２の場合、内輪１の
カム面６に対して保持器３のポケット３ａの位置を合わ
せるために、保持器３は内輪１に固定するのが好まし
い。そして、保持器３の壁部３ｂ，３ｂのテーパ状内面
の傾斜についても、壁部３ｂ，３ｂの幅寸法を内径側か
ら外径側に漸次幅狭とするような形態に設定する必要が
ある。このような実施形態２でも、上記実施形態１と同
様の作用、効果が得られる。(2) In the first embodiment, the example in which the cam surface 6 is provided on the outer race 2 is described. However, as in the second embodiment shown in FIGS. 6 may be provided. In the second embodiment, since the rotational centrifugal force acting on the rollers 4 can be received by the cylindrical inner peripheral surface of the outer race 1, the rotational centrifugal force acting on the rollers 4 is
Does not act as a force to move the roller 4 in the circumferential direction, and the behavior of the roller 4 is stabilized. In the case of the second embodiment, it is preferable that the retainer 3 is fixed to the inner ring 1 in order to align the position of the pocket 3 a of the retainer 3 with the cam surface 6 of the inner ring 1. The inclination of the tapered inner surfaces of the walls 3b, 3b of the retainer 3 also needs to be set in such a manner that the width of the walls 3b, 3b is gradually reduced from the inner diameter side to the outer diameter side. . In the second embodiment, the same operation and effect as those of the first embodiment can be obtained.
【００４０】（３） 上記実施形態１，２において、壁
部３ｂ，３ｂの厚み寸法（径方向寸法）を例えばＰＣＤ
の内径寸法よりも小さく設定してもよい。例えば、上記
実施形態２の変形として、図１０に示す実施形態３のよ
うに、壁部３ｂ，３ｂの外径寸法を、ＰＣＤの内径寸法
よりも小さく設定し、壁部３ｂ，３ｂの内面において厚
み方向のほぼ中央から外径端縁までの領域をテーパ状と
することができる。このような実施形態３でも、上記実
施形態２と同様の作用、効果が得られる。特に、図示し
ないが、壁部３ｂ，３ｂの内面全体をテーパ状とすれ
ば、ころ４の端面において内輪１寄りの１点が壁部３
ｂ，３ｂのテーパ状内面に対して当接する関係となるの
で、ころ４の傾き許容角度を上記実施形態２の場合より
もさらに大きく設定できると言える。なお、この実施形
態３の技術思想は、上記実施形態１にも適用できる。(3) In the first and second embodiments, the thickness (radial dimension) of the walls 3b, 3b is set to, for example, PCD.
May be set smaller than the inner diameter dimension of. For example, as a modification of the second embodiment, as in a third embodiment shown in FIG. 10, the outer diameter of the walls 3b, 3b is set smaller than the inner diameter of the PCD, and the inner surfaces of the walls 3b, 3b are formed. The region from the center in the thickness direction to the outer diameter edge can be tapered. In the third embodiment, the same operation and effect as those of the second embodiment can be obtained. In particular, although not shown, if the entire inner surface of the walls 3b, 3b is tapered, one point near the inner ring 1 on the end surface of the roller 4
Since there is a relationship of abutting against the tapered inner surfaces of b and 3b, it can be said that the inclination allowable angle of the rollers 4 can be set to be larger than in the case of the second embodiment. The technical idea of the third embodiment can be applied to the first embodiment.
【００４１】[0041]
【発明の効果】本発明の請求項１ないし４の一方向クラ
ッチ用の保持器は、ころの傾き許容角度を従来例に比べ
て大きくできるので、ころが頻繁に傾くような状況にな
っても、ころが僅かに傾いただけでは、言い換えればこ
ろが大きく傾かない限り、ころが壁部に当接せずに済む
ようになる。そのため、保持器のポケットの軸方向両側
の壁部とポケットの周方向両側の柱部との境に対して引
張応力が頻繁に作用することを防止できるようになり、
保持器の破損寿命を延ばせる結果となる。According to the retainer for a one-way clutch of the present invention, the allowable inclination angle of the roller can be made larger than that of the conventional example, so that the roller can be inclined frequently. If the rollers are only slightly inclined, in other words, the rollers do not have to contact the wall unless the rollers are largely inclined. Therefore, it is possible to prevent the tensile stress from frequently acting on the boundary between the walls on both sides in the axial direction of the pocket of the cage and the pillars on both sides in the circumferential direction of the pocket,
As a result, the life of the cage can be extended.
【００４２】しかも、壁部の幅寸法（軸方向寸法）は、
内径側（または外径側）において大きく外径側（または
内径側）において小さくなっているため、当該壁部にお
いて幅広側でのころとの軸方向隙間を従来例と同一に設
定した場合だと、前記壁部の断面積が、従来例において
軸方向隙間を小さくする場合に比べると小さくなるもの
の、従来例において軸方向隙間を大きくする場合に比べ
れば大きくできるので、結果的に保持器の著しい強度低
下が抑制されることになる。Furthermore, the width dimension (axial dimension) of the wall is
Since it is large on the inner diameter side (or outer diameter side) and smaller on the outer diameter side (or inner diameter side), it is assumed that the axial gap between the roller on the wide side and the wall is set to be the same as the conventional example. Although the cross-sectional area of the wall portion is smaller than the case where the axial gap is reduced in the conventional example, it can be larger than the case where the axial gap is increased in the conventional example. The decrease in strength is suppressed.
【００４３】本発明の請求項５および６の一方向クラッ
チは、上述した耐久性に優れた保持器を用いるので、耐
久性ならびに信頼性に優れたものとなる。The one-way clutch according to the fifth and sixth aspects of the present invention uses the above-described cage having excellent durability, and therefore has excellent durability and reliability.
【図１】本発明の実施形態１にかかる一方向クラッチの
上半分を断面にした側面図FIG. 1 is a side view showing a cross section of an upper half of a one-way clutch according to a first embodiment of the present invention;
【図２】図１の（２）−（２）線断面の矢視図FIG. 2 is a sectional view taken along line (2)-(2) of FIG.
【図３】実施形態１の保持器のポケット部分の平面展開
図FIG. 3 is a developed plan view of a pocket portion of the cage according to the first embodiment.
【図４】図２においてころを傾けた状態を示す説明図FIG. 4 is an explanatory view showing a state in which rollers are inclined in FIG. 2;
【図５】実施形態１において壁部のテーパ角度を大きく
した場合のころ傾き状態を示す説明図FIG. 5 is an explanatory diagram showing a roller tilt state when a taper angle of a wall portion is increased in the first embodiment.
【図６】本発明の実施形態２にかかる一方向クラッチ
で、図１に対応する図FIG. 6 shows a one-way clutch according to a second embodiment of the present invention, which corresponds to FIG.
【図７】実施形態２で、図２に対応する図FIG. 7 is a diagram corresponding to FIG. 2 in the second embodiment.
【図８】実施形態２で、図３に対応する図FIG. 8 is a diagram corresponding to FIG. 3 in the second embodiment.
【図９】実施形態２で、図４に対応する図FIG. 9 is a diagram corresponding to FIG. 4 in the second embodiment.
【図１０】本発明の実施形態３にかかる一方向クラッチ
で、図２に対応する図FIG. 10 shows a one-way clutch according to a third embodiment of the present invention, which corresponds to FIG.
【図１１】従来例にかかる一方向クラッチの上半分を断
面にした面図FIG. 11 is a cross-sectional view of the upper half of a one-way clutch according to a conventional example.
【図１２】図１１の（１２）−（１２）線断面の矢視図FIG. 12 is a sectional view taken along line (12)-(12) of FIG. 11;
【図１３】従来例の保持器のポケット部分の平面展開図FIG. 13 is a developed plan view of a pocket portion of a conventional cage.
【図１４】図１２においてころを傾けた状態を示す説明
図FIG. 14 is an explanatory view showing a state in which rollers are inclined in FIG. 12;
Ａ 一方向クラッチ １ 内輪 ２ 外輪 ３ 保持器 ３ａ 保持器のポケット ３ｂ 保持器の壁部 ３ｃ 保持器の柱部 ４ ころ ５ コイルバネ ６ カム面 A One-way clutch 1 Inner ring 2 Outer ring 3 Cage 3a Cage pocket 3b Cage wall 3c Cage column 4 Roller 5 Coil spring 6 Cam surface
Claims (6)
されるとともに一方環体の周面に嵌合固定され、かつ円
周数カ所に径方向内外に貫通するころ収納用のポケット
を有する一方向クラッチ用の保持器であって、 前記ポケットの軸方向両端の壁部の内面が、各壁部の幅
寸法（軸方向寸法）を一方環体に対する嵌合部位側から
他方環体側へ向けて漸次幅狭とするようなテーパ状に形
成されている、ことを特徴とする一方向クラッチ用の保
持器。1. A pocket for accommodating a roller which is interposed in a radially opposed space between two inner and outer rings and which is fitted and fixed to a peripheral surface of one of the rings and penetrates radially inward and outward at several locations around the circumference. A retainer for a one-way clutch, wherein the inner surfaces of the walls at both axial ends of the pocket have the width dimension (axial dimension) of each wall portion from the side of the fitting portion to one ring to the side of the other ring. A retainer for a one-way clutch, characterized in that the retainer is formed in a tapered shape such that the width gradually decreases toward the same.
されるとともに内側環体の外周面に嵌合固定され、かつ
円周数カ所に径方向内外に貫通するころ収納用のポケッ
トを有する一方向クラッチ用の保持器であって、 前記ポケットの軸方向両端の壁部の内面が、各壁部の幅
寸法（軸方向寸法）を外径側へ向けて漸次幅狭とするよ
うなテーパ状に形成されている、ことを特徴とする一方
向クラッチ用の保持器。2. A pocket for accommodating a roller which is interposed in a radially opposed space between two inner and outer rings and is fitted and fixed to an outer peripheral surface of an inner ring, and penetrates radially inward and outward at several circumferential positions. A retainer for a one-way clutch, wherein the inner surfaces of the wall portions at both axial ends of the pocket gradually narrow the width dimension (axial dimension) of each wall portion toward the outer diameter side. A retainer for a one-way clutch, which is formed in a tapered shape.
チ用の保持器において、前記ポケットの軸方向両側の壁
部の内面において径方向全領域がテーパ状に形成されて
いる、ことを特徴とする一方向クラッチ用の保持器。3. The cage for a one-way clutch according to claim 1, wherein an entire radial area is formed in a tapered shape on inner surfaces of walls on both axial sides of the pocket. For a one-way clutch.
持器において、前記ポケットの軸方向両側の壁部の外径
寸法が、各ポケットに収納されるころそれぞれの中心を
結ぶ円の径寸法よりも小さく設定され、かつ、この壁部
の内面において径方向途中から外径端縁までの領域がテ
ーパ状に形成されている、ことを特徴とする一方向クラ
ッチ用の保持器。4. The cage for a one-way clutch according to claim 2, wherein the outer diameters of the wall portions on both axial sides of the pocket are the diameters of circles connecting the centers of the respective rollers stored in each pocket. A retainer for a one-way clutch, wherein the retainer is set to be smaller than the size, and a region from an intermediate portion in a radial direction to an outer peripheral edge is formed in a tapered shape on an inner surface of the wall portion.
期回転させるロック状態と相対回転させるフリー状態と
に切り換える一方向クラッチであって、 前記２つの環体の径方向対向空間に介装されかつくさび
部材としてのころを周方向転動可能に保持する保持器と
して、請求項１ないし４のいずれかに記載の保持器が用
いられている、ことを特徴とする一方向クラッチ。5. A one-way clutch for switching between a locked state in which two inner and outer rings arranged concentrically are rotated synchronously and a free state in which the two rings are relatively rotated, wherein the two rings are radially opposed to each other. A one-way clutch, wherein the retainer according to any one of claims 1 to 4 is used as a retainer interposed and rotatably holding a roller as a wedge member in a circumferential direction.
て他方の環体の対向周面との間でくさび状空間を形成す
るカム面と、 前記各くさび状空間に１つずつ配置されてロック位置と
フリー位置との間で転動変位して状態を切り換えるくさ
び部材としてのころと、 前記各くさび状空間において前記ころと周方向隣り合わ
せに収納されかつころをくさび状空間の狭い側へ弾発付
勢する弾発付勢手段と、 前記２つの環体の径方向対向空間に介装されかつ前記カ
ム面に対応する円周数カ所に前記ころおよび弾発付勢手
段が収納されるポケットを有する保持器とを備え、 前記保持器として、請求項１ないし４のいずれかに記載
の保持器が用いられている、ことを特徴とする一方向ク
ラッチ。6. A wedge between two inner and outer rings arranged concentrically, and an opposing peripheral surface of one of the inner and outer rings provided at several places on the circumferential surface of the other ring. A cam surface forming a wedge-shaped space; a roller as a wedge member that is arranged one by one in each of the wedge-shaped spaces and that rolls and displaces between a locked position and a free position to switch the state; and each of the wedge-shaped spaces , A resilient biasing means housed adjacent to the roller in the circumferential direction and resiliently biases the roller toward a narrow side of a wedge-shaped space; and a cam surface interposed in a radially opposed space between the two annular bodies. And a retainer having pockets in which the rollers and the resilient urging means are stored at several places corresponding to the following. 5. The retainer according to claim 1, wherein the retainer is used as the retainer. A one-way clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08099698A JP3731705B2 (en) | 1998-03-27 | 1998-03-27 | Cage for one-way clutch, one-way clutch using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08099698A JP3731705B2 (en) | 1998-03-27 | 1998-03-27 | Cage for one-way clutch, one-way clutch using it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11280795A true JPH11280795A (en) | 1999-10-15 |
| JP3731705B2 JP3731705B2 (en) | 2006-01-05 |
Family
ID=13734112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08099698A Expired - Fee Related JP3731705B2 (en) | 1998-03-27 | 1998-03-27 | Cage for one-way clutch, one-way clutch using it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3731705B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063052A (en) * | 2007-09-05 | 2009-03-26 | Shimano Inc | Roller clutch |
-
1998
- 1998-03-27 JP JP08099698A patent/JP3731705B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063052A (en) * | 2007-09-05 | 2009-03-26 | Shimano Inc | Roller clutch |
| KR101408081B1 (en) * | 2007-09-05 | 2014-06-16 | 가부시키가이샤 시마노 | Roller clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3731705B2 (en) | 2006-01-05 |
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