JP2004011784A - One-way clutch - Google Patents

One-way clutch Download PDF

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Publication number
JP2004011784A
JP2004011784A JP2002166739A JP2002166739A JP2004011784A JP 2004011784 A JP2004011784 A JP 2004011784A JP 2002166739 A JP2002166739 A JP 2002166739A JP 2002166739 A JP2002166739 A JP 2002166739A JP 2004011784 A JP2004011784 A JP 2004011784A
Authority
JP
Japan
Prior art keywords
rollers
retainer
cam surface
locked
way clutch
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.)
Pending
Application number
JP2002166739A
Other languages
Japanese (ja)
Inventor
Shoji Itomi
糸見 正二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2002166739A priority Critical patent/JP2004011784A/en
Publication of JP2004011784A publication Critical patent/JP2004011784A/en
Pending legal-status Critical Current

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  • Mechanical Operated Clutches (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-way clutch in which clutch action can be temporarily released easily. <P>SOLUTION: A retainer 5 for springs 6 to press plural rollers 4 separated into groups where they are applied to each other by cam surfaces 2 provided on an inner circumferential surface of an outer ring 1 in such directions that they are locked. Pillar parts 8 to retain the springs 6 are cut and raised from a circular plate part 7 that is rotatably overlapped with a side surface of the outer ring 1. An arm part 16 provided on the outer diameter side of it and the outer diameter side of the outer ring 1 are connected to each other by a coil spring 14. The retainer 5 is energized for rotation in such a direction that the rollers 4 are locked by the cam surfaces 2. By this rotation energization, the retainer 5 is relatively rotated in an reverse direction to the rotation energization for a clearance between a pin 15 and a hole 17, so that pressure of the springs 6 to the rollers 4 is released, thereby clutch action of this one-way clutch is thus temporarily released easily. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は、ころを係合子として用いた一方向クラッチに関するものである。
【0002】
【従来の技術】
ころを係合子とする一方向クラッチとしては、例えば、特許公報第3270667号に記載されたものがある。この一方向クラッチは、図5に示すように、外輪51の内周面に複数の傾斜カム面52が設けられ、回転軸としての内輪53の外周面との間のクラッチ空間で、複数のころ54が各カム面52の設けられた周方向位置に配され、これらの各ころ54が外輪51に固定された弾性部材としてのばね55により、各カム面52でロックされる方向に押圧されている。したがって、内輪53が図中に矢印で示す時計回りに回転すると、各ころ54がカム面52でロックされてクラッチが作用し、内輪53が反時計回りに回転するときは、クラッチが作用せずに空転する。
【0003】
このようなころを係合子とする一方向クラッチには、内輪の外周面に傾斜カム面を設けたものもあるが、いずれの一方向クラッチにおいても、ころを押圧する弾性部材は、カム面が設けられた側の外輪または内輪に、直接もしくは保持器を介して固定されている。
【0004】
【発明が解決しようとする課題】
上述した従来の一方向クラッチは、ころを押圧する弾性部材が、カム面を設けた側の外輪または内輪に、直接もしくは間接的に固定されているので、常時、一方向にクラッチが作用する。このため、例えば、回転部の点検や補修等のために、回転部を両方向へ回転自在としたいときには、一方向クラッチを取り外す手間を必要とする。
【0005】
また、従来の一方向クラッチは、クラッチが作用する方向に内輪または外輪が回転すると、すぐに各ころがカム面でロックされる。このため、クラッチが作用する内輪と外輪との相対回転位置を、任意に調節することができない。
【0006】
上述したような不具合を解消するためには、一方向クラッチのクラッチ作用を一時的に解除できればよい。
【0007】
そこで、この発明の課題は、簡単にクラッチ作用を一時的に解除できる一方向クラッチを提供することである。
【0008】
【課題を解決するための手段】
上記の目的を達成するために、この発明は、回転中心軸の回りのクラッチ空間で対向する外輪の内周面または内輪の外周面のいずれかに複数の傾斜カム面が設けられ、前記クラッチ空間のこれらの各カム面が設けられた周方向位置にころが配され、弾性部材によりこれらのころが前記カム面でロックされる方向に押圧された一方向クラッチにおいて、前記ころを押圧する弾性部材を保持する保持器を設け、この保持器を、前記カム面が設けられた外輪または内輪に対して、前記ころがカム面でロックされる方向と逆方向に相対回転可能として、この保持器を逆方向に相対回転させたときに、前記弾性部材によるころの押圧を解放する構成を採用した。
【0009】
すなわち、ころを押圧する弾性部材を保持する保持器を設け、この保持器を、カム面が設けられた外輪または内輪に対して、ころがカム面でロックされる方向と逆方向に相対回転可能とすることにより、この保持器を逆方向に相対回転させたときに、弾性部材によるころの押圧を解放して、簡単に一方向クラッチのクラッチ作用を一時的に解除できるようにした。
【0010】
前記保持器は、前記回転中心軸の回りに回転自在とされて、前記クラッチ空間の側方外側に配される円板状部に、クラッチ空間に側方から挿入されて前記弾性部材を保持する柱部を設けたものとすることができ、前記円板状部を前記ころがカム面でロックされる方向に回転付勢する手段を設けて、この円板状部を、前記カム面が設けられた外輪または内輪に、前記回転付勢の方向と逆方向への回転を許容して係止することにより、回転付勢された回転自在な円板状部を、カム面が設けられた外輪または内輪に対して、回転付勢と逆方向に相対回転させて、弾性部材によるころの押圧を解放することができる。円板状部は、クラッチ空間の片側のみに配して、柱部を円板状部に片持ち状に設けてもよいし、クラッチ空間の両側に配して、柱部を両側の円板状部に差し渡して設けてもよい。
【0011】
前記弾性部材を前記保持器と一体に形成することにより、一方向クラッチの組み立てを容易にすることができる。
【0012】
前記ころを前記クラッチ空間の周方向で複数個相互に当接させ、この相互に当接したころの群を、1つの前記弾性部材でまとめて前記カム面でロックされる方向に押圧することにより、弾性部材の個数を少なくして、クラッチ空間に配されるころの本数を多くし、クラッチのトルク伝達能力を大きくすることができる。
【0013】
前記相互に当接したころの群を、3群以上に設けることにより、カム面が設けられた外輪または内輪に熱変形等があっても、最小限の本数のころをカム面にロックさせて、トルク伝達能力を確保することができる。
【0014】
すなわち、カム面が設けられた外輪または内輪に熱変形等があると、カム面の位置に不揃いが生じることがあり、このようなときに1つの弾性部材で相互に当接したころの群をまとめて押圧すると、カム面にロックされないころが生じる。最悪の場合は、1つの群で1本のころしかカム面にロックされない。したがって、ころの群を3群以上に設けることにより、最小限3本以上のころをカム面にロックさせることができる。
【0015】
【実施の形態】
以下、図1乃至図4に基づき、この発明の実施形態を説明する。図1(a)、(b)および図2は、第1の実施形態を示す。この一方向クラッチは、外輪1の内周面に複数の傾斜カム面2が設けられ、回転軸としての内輪3の外周面との間のクラッチ空間で、周方向で相互に当接する4つの群に分けられた複数のころ4が、各カム面2が設けられた周方向位置に配され、それぞれの群のころ4が、各群の間で保持器5に保持された弾性部材としての1つずつのばね6により、各カム面2でロックされる方向に押圧されている。したがって、内輪3が図1(a)中に矢印で示す時計回りに回転すると、各ころ4がカム面2でロックされてクラッチが作用し、内輪3が反時計回りに回転するときは、クラッチが作用せずに空転する。
【0016】
前記保持器5は金属板で形成され、クラッチ空間の片側で外輪1の側面に重ねられた円板状部7に、切り起こしで形成された4本の柱部8が90°の位相で設けられている。各柱部8はクラッチ空間に直角に挿入され、1つずつばね6を保持するようになっており、円板状部7が内輪3にねじ10で取り付けられた座金側板9で抜け止めされている。座金側板9の外周部内側には、円板状部7を回転自在に逃がす段差部9aが設けられている。
【0017】
前記外輪1は、固定用のボルト孔11が設けられた3つの突出部12が外径側に形成され、1つの突出部12の脇に設けられた鍔部13の孔13aにコイルばね14の一端が引っ掛けられるとともに、保持器5の円板状部7が重ねられた側面にピン15が立てられている。また、保持器5の円板状部7には、外輪1の外径側に直角に張り出すアーム部16が外径側に形成され、このアーム部16の孔16aにコイルばね14の他端が引っ掛けられるとともに、アーム部16と反対側に設けられた孔17にピン15が隙間を開けて嵌まり込んでいる。
【0018】
したがって、前記円板状部7を回転自在とされた保持器5は、コイルばね14により各ころ4がカム面2でロックされる方向に回転付勢されて、ピン15で外輪1に係止されており、この回転付勢された保持器5を、ピン15と孔17との隙間の分だけ外輪1に対して逆方向に相対回転させることにより、各ばね6によるころ4の群の押圧を解放して、一方向クラッチの作用を一時的に解除することができる。
【0019】
図3は、前記保持器5の変形例を示す。この保持器5は、前記各柱部8の切り起こし高さを高くしてその先端部8aを屈曲させ、この屈曲した先端部8aで前記各ころ4の群を押圧するようにしたものである。したがって、この変形例のものを用いれば、前記ばね6の組み込みが不要となり、一方向クラッチを容易に組み立てることができる。その他の部分は、図2に示した保持器5と同じである。
【0020】
図4は、第2の実施形態を示す。この一方向クラッチは、複数の傾斜カム面2が設けられた外輪1の内周面と内輪3の外周面との間のクラッチ空間に、複数のころ4が周方向で間隔を開けて配され、各ころ4が保持器5の各柱部8に保持されたばね6により、カム面2でロックされる方向に個別に押圧されている。その他の部分は、第1の実施形態のものと同じである。
【0021】
上述した各実施形態では、傾斜カム面が設けられた外輪に対して、ばねの保持器をころがカム面でロックされる方向と逆方向に相対回転可能とする手段として、回転自在とした保持器をコイルばねでころがカム面でロックされる方向に回転付勢し、この回転付勢を外輪に係止したピンと孔との隙間の分だけ、回転付勢した保持器を逆方向へ相対回転可能とする方法を採用したが、この保持器を相対回転可能とする手段は、実施形態のものに限定されることはなく、保持器を回転自在として、傾斜カム面が設けられた外輪に対するその相対回転位置を係止する手段を設け、この係止手段を簡単に解除できるものとすればよい。この簡単に解除できる保持器と外輪の係止手段としては、ピンと穴や溝、ねじとねじ穴等のように係合で係止する手段、クランプのように結合力で係止する手段、実施形態のように付勢力とストッパの組み合わせで係止する手段等を採用することができる。
【0022】
また、上述した各実施形態では、外輪の内周面に傾斜カム面を設け、保持器の回転付勢を外輪側に係止したが、傾斜カム面を内輪の外周面に設け、保持器の回転付勢を内輪側に係止してもよい。
【0023】
さらに、ころを押圧する弾性部材と保持器は、各実施形態や変形例のものに限定されることはなく、保持器は回転中心軸の回りに回転可能で、クラッチ空間でばねやゴム等の弾性部材を保持する保持部を備えたものであればよい。
【0024】
【発明の効果】
以上のように、この発明の一方向クラッチは、ころを押圧する弾性部材を保持する保持器を設け、この保持器を、カム面が設けられた外輪または内輪に対して、ころがカム面でロックされる方向と逆方向に相対回転可能とすることにより、この保持器を逆方向に相対回転させたときに、弾性部材によるころの押圧を解放するようにしたので、簡単に一方向クラッチのクラッチ作用を一時的に解除することができる。
【0025】
また、ころをクラッチ空間の周方向で複数個相互に当接させ、この相互に当接したころの群を、1つの弾性部材でまとめてカム面でロックされる方向に押圧するようにしたので、弾性部材の個数を少なくして、クラッチ空間に配されるころの本数を多くし、クラッチのトルク伝達能力を大きくすることができる。
【0026】
前記相互に当接したころの群を、3群以上に設けることにより、カム面が設けられた外輪または内輪に熱変形等があっても、最小限の本数のころをカム面にロックさせて、トルク伝達能力を確保することができる。
【図面の簡単な説明】
【図1】aは第1の実施形態の一方向クラッチを示す切欠き正面図、bはaの縦断側面図
【図2】図1の一方向クラッチの分解斜視図
【図3】図2の保持器の変形例を示す斜視図
【図4】第2の実施形態の一方向クラッチを示す切欠き正面図
【図5】従来の一方向クラッチを示す縦断正面図
【符号の説明】
1 外輪
2 カム面
3 内輪
4 ころ
5 保持器
6 ばね
7 円板状部
8 柱部
8a 先端部
9 座金側板
9a 段差部
10 ねじ
11 ボルト孔
12 突出部
13 鍔部
13a 孔
14 コイルばね
15 ピン
16 アーム部
16a 孔
17 孔
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a one-way clutch using rollers as engagement elements.
[0002]
[Prior art]
As a one-way clutch using a roller as an engagement element, for example, there is a one-way clutch described in Japanese Patent Publication No. 3270667. In this one-way clutch, as shown in FIG. 5, a plurality of inclined cam surfaces 52 are provided on an inner peripheral surface of an outer ring 51, and a plurality of rollers are provided in a clutch space between the outer peripheral surface of an inner ring 53 as a rotating shaft. 54 are arranged at circumferential positions where the respective cam surfaces 52 are provided. Each of these rollers 54 is pressed by a spring 55 as an elastic member fixed to the outer race 51 in a direction in which the respective rollers 54 are locked by the respective cam surfaces 52. I have. Accordingly, when the inner ring 53 rotates clockwise as indicated by the arrow in the drawing, each roller 54 is locked by the cam surface 52 and the clutch operates. When the inner ring 53 rotates counterclockwise, the clutch does not operate. Idling.
[0003]
Some one-way clutches using such a roller as an engaging element are provided with a sloped cam surface on the outer peripheral surface of the inner race.In any one-way clutch, the elastic member pressing the roller has a cam surface. It is fixed to the outer ring or the inner ring on the provided side directly or via a retainer.
[0004]
[Problems to be solved by the invention]
In the above-described conventional one-way clutch, the elastic member that presses the rollers is fixed directly or indirectly to the outer ring or the inner ring on the side where the cam surface is provided, so that the clutch always acts in one direction. For this reason, for example, when it is desired to freely rotate the rotating portion in both directions for checking or repairing the rotating portion, it is necessary to remove the one-way clutch.
[0005]
In the conventional one-way clutch, when the inner ring or the outer ring rotates in the direction in which the clutch acts, each roller is immediately locked by the cam surface. For this reason, the relative rotational position of the inner wheel and the outer wheel on which the clutch operates cannot be arbitrarily adjusted.
[0006]
In order to solve the above-mentioned problem, it is only necessary to temporarily release the clutch operation of the one-way clutch.
[0007]
Therefore, an object of the present invention is to provide a one-way clutch that can easily temporarily release the clutch operation.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a plurality of inclined cam surfaces are provided on either an inner peripheral surface of an outer race or an outer peripheral surface of an inner race in a clutch space around a rotation center axis. In a one-way clutch in which rollers are arranged at circumferential positions where these respective cam surfaces are provided, and the rollers are pressed by a resilient member in a direction locked by the cam surfaces, an elastic member for pressing the rollers is provided. Is provided, and the retainer is rotatable relative to an outer ring or an inner ring provided with the cam surface in a direction opposite to a direction in which the rollers are locked on the cam surface. A configuration is adopted in which when the relative rotation is performed in the opposite direction, the pressing of the rollers by the elastic member is released.
[0009]
That is, a retainer for holding an elastic member that presses a roller is provided, and the retainer can be relatively rotated with respect to an outer ring or an inner ring provided with a cam surface in a direction opposite to a direction in which the roller is locked by the cam surface. Thus, when the retainer is relatively rotated in the reverse direction, the pressing of the rollers by the elastic member is released, and the clutch action of the one-way clutch can be temporarily temporarily released.
[0010]
The retainer is rotatable about the rotation center axis, and is inserted into the clutch space from the side into a disk-shaped portion disposed on the lateral side of the clutch space to hold the elastic member. A column portion may be provided, and a means for urging the disk-shaped portion in a direction in which the rollers are locked by a cam surface is provided, and the disk-shaped portion is provided with the cam surface. An outer ring provided with a cam surface is provided with a cam surface provided for a rotatable and rotatable disk-shaped portion by allowing the outer ring or the inner ring to rotate in a direction opposite to the direction of the rotational bias while allowing the rotation. Alternatively, the pressing of the rollers by the elastic member can be released by relatively rotating the inner ring in the direction opposite to the rotational bias. The disc-shaped portion may be arranged on only one side of the clutch space, and the column portion may be provided in a cantilever shape on the disc-shaped portion, or may be arranged on both sides of the clutch space, and the column portion may be arranged on both sides of the disc. It may be provided to extend over the shape.
[0011]
The one-way clutch can be easily assembled by forming the elastic member integrally with the retainer.
[0012]
A plurality of the rollers are brought into contact with each other in the circumferential direction of the clutch space, and a group of the rollers that come into contact with each other is pressed together in a direction locked by the cam surface by one elastic member. By reducing the number of elastic members, the number of rollers disposed in the clutch space can be increased, and the torque transmission capability of the clutch can be increased.
[0013]
By providing three or more groups of rollers in contact with each other, even if there is thermal deformation or the like in the outer ring or inner ring provided with the cam surface, the minimum number of rollers can be locked to the cam surface. , Torque transmission capability can be ensured.
[0014]
That is, if there is thermal deformation or the like in the outer ring or the inner ring provided with the cam surface, the position of the cam surface may be irregular, and in such a case, the group of rollers that abut against each other with one elastic member may be used. When pressed together, there are times when the cam surface is not locked. In the worst case, only one roller in a group is locked to the cam surface. Therefore, by providing three or more roller groups, at least three or more rollers can be locked to the cam surface.
[0015]
Embodiment
An embodiment of the present invention will be described below with reference to FIGS. 1A, 1B, and 2 show a first embodiment. In this one-way clutch, a plurality of inclined cam surfaces 2 are provided on an inner peripheral surface of an outer ring 1, and a clutch space between the outer ring 1 and an outer peripheral surface of an inner ring 3 serving as a rotating shaft has four groups that come into contact with each other in a circumferential direction. Are arranged at circumferential positions where the respective cam surfaces 2 are provided, and each group of rollers 4 serves as an elastic member held by a retainer 5 between the respective groups. Each of the springs 6 is pressed in a direction to be locked by each cam surface 2. Therefore, when the inner race 3 rotates clockwise as indicated by the arrow in FIG. 1A, the rollers 4 are locked by the cam surface 2 to actuate the clutch, and when the inner race 3 rotates counterclockwise, the clutch Spins without acting.
[0016]
The retainer 5 is formed of a metal plate, and four pillars 8 formed by cutting and raising are provided at a phase of 90 ° on a disk-shaped portion 7 overlapped on one side of the clutch space on the side surface of the outer race 1. Have been. Each of the pillars 8 is inserted at right angles into the clutch space, and is adapted to hold a spring 6 one by one. The disc-shaped portion 7 is prevented from coming off by a washer side plate 9 attached to the inner race 3 with a screw 10. I have. Inside the outer peripheral portion of the washer-side plate 9, there is provided a step portion 9 a for rotatably releasing the disk-shaped portion 7.
[0017]
The outer race 1 has three protrusions 12 provided with fixing bolt holes 11 formed on the outer diameter side, and a coil spring 14 having a hole 13 a of a flange 13 provided beside one protrusion 12. One end is hooked, and a pin 15 is erected on the side of the retainer 5 on which the disk-shaped portion 7 is overlapped. An arm 16 is formed on the outer surface of the disc-shaped portion 7 of the retainer 5 at right angles to the outer diameter of the outer race 1. The other end of the coil spring 14 is inserted into a hole 16 a of the arm 16. Is hooked, and the pin 15 is fitted into the hole 17 provided on the opposite side of the arm 16 with a gap.
[0018]
Accordingly, the retainer 5 having the disk-shaped portion 7 rotatable is urged to rotate by the coil spring 14 in a direction in which the rollers 4 are locked on the cam surface 2, and is locked to the outer ring 1 by the pins 15. By rotating the cage 5 urged to rotate relative to the outer ring 1 in the reverse direction by the gap between the pin 15 and the hole 17, the springs 6 press the group of rollers 4. Can be released to temporarily release the operation of the one-way clutch.
[0019]
FIG. 3 shows a modification of the retainer 5. The retainer 5 is configured such that the cut-and-raised height of each of the pillars 8 is increased to bend the tip 8a, and the bent tip 8a presses the group of the rollers 4. . Therefore, if this modified example is used, the incorporation of the spring 6 becomes unnecessary, and the one-way clutch can be easily assembled. Other parts are the same as those of the retainer 5 shown in FIG.
[0020]
FIG. 4 shows a second embodiment. In this one-way clutch, a plurality of rollers 4 are arranged at intervals in a circumferential direction in a clutch space between an inner peripheral surface of an outer race 1 provided with a plurality of inclined cam surfaces 2 and an outer peripheral surface of an inner race 3. The rollers 4 are individually pressed by the springs 6 held by the pillars 8 of the retainer 5 in the direction in which the rollers 4 are locked on the cam surface 2. Other parts are the same as those of the first embodiment.
[0021]
In each of the above-described embodiments, the spring retainer is rotatable with respect to the outer ring provided with the inclined cam surface, as a means capable of relatively rotating the roller in the direction opposite to the direction in which the rollers are locked by the cam surface. The roller is urged to rotate by a coil spring in the direction in which the rollers are locked by the cam surface, and the rotation is urged in the opposite direction by the gap between the pin and the hole that locks the outer ring. Although the method of making the retainer rotatable is adopted, the means for making the retainer relatively rotatable is not limited to the one of the embodiment, and makes the retainer freely rotatable with respect to the outer ring provided with the inclined cam surface. Means for locking the relative rotation position may be provided, and the locking means may be easily released. As means for locking the retainer and the outer ring which can be easily released, means for locking by engagement such as a pin and a hole or a groove, screw and a screw hole, means for locking by a coupling force such as a clamp, As in the embodiment, means for locking with a combination of the urging force and the stopper can be adopted.
[0022]
In each of the embodiments described above, the inclined cam surface is provided on the inner peripheral surface of the outer ring, and the rotation bias of the retainer is locked on the outer ring side. However, the inclined cam surface is provided on the outer peripheral surface of the inner ring, The rotation bias may be locked on the inner ring side.
[0023]
Further, the elastic member and the retainer that press the rollers are not limited to those of the embodiments and the modifications, and the retainer is rotatable around the rotation center axis, and the spring and the rubber are used in the clutch space. What is necessary is just to be provided with the holding part which holds an elastic member.
[0024]
【The invention's effect】
As described above, the one-way clutch of the present invention is provided with the retainer that holds the elastic member that presses the roller, and the retainer is provided on the outer ring or the inner ring provided with the cam surface, and the roller has the cam surface. By enabling relative rotation in the opposite direction to the direction in which the lock is applied, when the retainer is relatively rotated in the opposite direction, the pressing of the rollers by the elastic member is released, so that the one-way clutch can be easily rotated. The clutch operation can be temporarily released.
[0025]
In addition, a plurality of rollers are brought into contact with each other in the circumferential direction of the clutch space, and a group of these rollers that come into contact with each other is collectively pressed by one elastic member in a direction locked by the cam surface. By reducing the number of elastic members, the number of rollers disposed in the clutch space can be increased, and the torque transmission capability of the clutch can be increased.
[0026]
By providing three or more groups of rollers in contact with each other, even if there is thermal deformation or the like in the outer ring or inner ring provided with the cam surface, the minimum number of rollers can be locked to the cam surface. , Torque transmission capability can be ensured.
[Brief description of the drawings]
1A is a cutaway front view showing a one-way clutch according to the first embodiment, and FIG. 1B is a longitudinal side view of a. FIG. 2 is an exploded perspective view of the one-way clutch shown in FIG. FIG. 4 is a cutaway front view showing a one-way clutch according to a second embodiment. FIG. 5 is a longitudinal sectional view showing a conventional one-way clutch.
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Cam surface 3 Inner ring 4 Roller 5 Cage 6 Spring 7 Disc-shaped part 8 Column part 8a Tip part 9 Washer side plate 9a Step part 10 Screw 11 Bolt hole 12 Projection part 13 Collar part 13a Hole 14 Coil spring 15 Pin 16 Arm part 16a hole 17 hole

Claims (5)

回転中心軸の回りのクラッチ空間で対向する外輪の内周面または内輪の外周面のいずれかに複数の傾斜カム面が設けられ、前記クラッチ空間のこれらの各カム面が設けられた周方向位置にころが配され、弾性部材によりこれらのころが前記カム面でロックされる方向に押圧された一方向クラッチにおいて、前記ころを押圧する弾性部材を保持する保持器を設け、この保持器を、前記カム面が設けられた外輪または内輪に対して、前記ころがカム面でロックされる方向と逆方向に相対回転可能として、この保持器を逆方向に相対回転させたときに、前記弾性部材によるころの押圧を解放するようにしたことを特徴とする一方向クラッチ。A plurality of inclined cam surfaces are provided on either the inner peripheral surface of the outer race or the outer peripheral surface of the inner race in the clutch space around the rotation center axis, and a circumferential position of the clutch space on which each of these cam surfaces is provided. In a one-way clutch in which rollers are arranged and these rollers are pressed in a direction in which the rollers are locked on the cam surface by an elastic member, a retainer for holding an elastic member that presses the rollers is provided. With respect to the outer ring or the inner ring provided with the cam surface, the rollers can be relatively rotated in a direction opposite to a direction in which the rollers are locked by the cam surface, and when the retainer is relatively rotated in the opposite direction, the elastic member A one-way clutch characterized by releasing roller pressing. 前記保持器を、前記回転中心軸の回りに回転自在とされて、前記クラッチ空間の側方外側に配される円板状部に、クラッチ空間に側方から挿入されて前記弾性部材を保持する柱部を設けたものとし、前記円板状部を前記ころがカム面でロックされる方向に回転付勢する手段を設けて、この円板状部を、前記カム面が設けられた外輪または内輪に、前記回転付勢の方向と逆方向への回転を許容して係止した請求項1に記載の一方向クラッチ。The retainer is rotatable about the rotation center axis, and is inserted into the clutch space from the side into a disk-shaped portion disposed on the side outside of the clutch space to hold the elastic member. It is assumed that a pillar portion is provided, and means for urging the disc-shaped portion to rotate in a direction in which the rollers are locked by a cam surface is provided, and the disc-shaped portion is formed on an outer ring provided with the cam surface or 2. The one-way clutch according to claim 1, wherein the inner ring is locked by allowing rotation in a direction opposite to the direction of the rotational bias. 前記弾性部材を前記保持器と一体に形成した請求項1または2に記載の一方向クラッチ。The one-way clutch according to claim 1, wherein the elastic member is formed integrally with the retainer. 前記ころを前記クラッチ空間の周方向で複数個相互に当接させ、この相互に当接したころの群を、1つの前記弾性部材でまとめて前記カム面でロックされる方向に押圧するようにした請求項1乃至3のいずれかに記載の一方向クラッチ。A plurality of the rollers are brought into contact with each other in the circumferential direction of the clutch space, and a group of the rollers that come into contact with each other is pressed together in a direction locked by the cam surface by one elastic member. The one-way clutch according to any one of claims 1 to 3, wherein: 前記相互に当接したころの群を、3群以上に設けた請求項4に記載の一方向クラッチ。The one-way clutch according to claim 4, wherein three or more groups of the rollers in contact with each other are provided.
JP2002166739A 2002-06-07 2002-06-07 One-way clutch Pending JP2004011784A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007263358A (en) * 2005-11-15 2007-10-11 Ntn Corp One-way clutch unit
WO2008001842A1 (en) * 2006-06-30 2008-01-03 Ntn Corporation One-way clutch unit
JP2008057549A (en) * 2006-07-31 2008-03-13 Ntn Corp Drive force forward/reverse switching device
JP2008082455A (en) * 2006-09-28 2008-04-10 Jtekt Corp One-way clutch with torque limiter
US7607526B2 (en) * 2005-06-08 2009-10-27 Ntn Corporation Anti-reverse input clutch
WO2010053002A1 (en) * 2008-11-05 2010-05-14 日立建機株式会社 Linear actuator
CN107630949A (en) * 2017-11-01 2018-01-26 重庆市力波机械制造有限公司 Six post roller-type overrunning clutches

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7607526B2 (en) * 2005-06-08 2009-10-27 Ntn Corporation Anti-reverse input clutch
JP2007263358A (en) * 2005-11-15 2007-10-11 Ntn Corp One-way clutch unit
WO2008001842A1 (en) * 2006-06-30 2008-01-03 Ntn Corporation One-way clutch unit
JP2008008447A (en) * 2006-06-30 2008-01-17 Ntn Corp One-way clutch unit
US8151959B2 (en) 2006-06-30 2012-04-10 Ntn Corporation One-way clutch unit
JP2008057549A (en) * 2006-07-31 2008-03-13 Ntn Corp Drive force forward/reverse switching device
JP2008082455A (en) * 2006-09-28 2008-04-10 Jtekt Corp One-way clutch with torque limiter
WO2010053002A1 (en) * 2008-11-05 2010-05-14 日立建機株式会社 Linear actuator
JP2010112409A (en) * 2008-11-05 2010-05-20 Hitachi Constr Mach Co Ltd Linear actuator
CN102203462A (en) * 2008-11-05 2011-09-28 日立建机株式会社 Linear actuator
CN107630949A (en) * 2017-11-01 2018-01-26 重庆市力波机械制造有限公司 Six post roller-type overrunning clutches

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