JP2008275124A - Creep prevention mechanism for bearing - Google Patents

Creep prevention mechanism for bearing Download PDF

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JP2008275124A
JP2008275124A JP2007122416A JP2007122416A JP2008275124A JP 2008275124 A JP2008275124 A JP 2008275124A JP 2007122416 A JP2007122416 A JP 2007122416A JP 2007122416 A JP2007122416 A JP 2007122416A JP 2008275124 A JP2008275124 A JP 2008275124A
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wedge
housing
bearing
recess
outer ring
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JP5194551B2 (en
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Masanao Sato
正尚 佐藤
Tatsuo Wakabayashi
達男 若林
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost creep prevention mechanism for a bearing capable of being assembled in a short period of time and surely preventing creeping. <P>SOLUTION: The creep prevention mechanism for the bearing prevents relative slide of bearing rings (inner and outer rings 2, 4) arranged to confront with each other in a relatively rotatable manner and an attachment section (for example, a housing 8) to which the race rings are attached. The creep prevention mechanism is provided with a recessed part G formed by partially recessing a circumferential surface 4s of at least one of the bearing rings (the outer ring) at a side for attaching to the attachment section and a wedge mechanism provided between the recessed part and the attachment section. The wedge mechanism is provided with an elastically deformable elastic part (a spring member 10) and a wedge part (a rolling member 12) kept in a state pressed to the attachment section by the elastic part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、軸受回転時におけるクリープの発生を防止する技術に関する。   The present invention relates to a technique for preventing the occurrence of creep during bearing rotation.

従来、軸受回転中に、軸受を構成する軌道輪と、これらが取り付けられる取付部位(例えば、軸、ハウジング)との間に相対すべり現象が発生することが知られている。なお、相対すべり現象は、一方の軌道輪(例えば、回転輪)と取付部位との間では、クリープ現象として発生し、他方の軌道輪(即ち、静止輪)と取付部位との間では、連れ回り現象として発生する。このような相対すべり現象が発生すると、軌道輪と取付部位との間が摩耗してガタが生じたり、その摩耗粉が軸受内部に侵入して軸受寿命を低下させたりする場合がある。なお、以下の説明では、上述したような相対すべりを総じて単にクリープと言う。   Conventionally, it is known that a relative slip phenomenon occurs between a bearing ring constituting a bearing and a mounting portion (for example, a shaft or a housing) to which these are mounted during rotation of the bearing. The relative slip phenomenon occurs as a creep phenomenon between one bearing ring (e.g., a rotating wheel) and an attachment site, and between the other race ring (i.e., stationary ring) and the installation site. Occurs as a turning phenomenon. When such a relative slip phenomenon occurs, there is a case where the raceway and the mounting portion are worn and play occurs, or the wear powder penetrates into the inside of the bearing to reduce the bearing life. In the following description, the relative slip as described above is generally simply referred to as creep.

そこで、例えば特許文献１には、外輪及びベアリングカバー(取付部位)の双方を一部切り欠いて凹部を形成し、その凹部内にボールを挿入することで、クリープの発生を防止する技術が提案されている。しかしながら、当該技術では、凹部内に所定の予圧が掛かった状態でボールを挿入する必要上、凹部及びボールに対して高精度な加工技術と高い組立精度が要求されるため、製造コストが上昇してしまうといった問題がある。   Therefore, for example, Patent Document 1 proposes a technique for preventing the occurrence of creep by forming a recess by partially cutting out both the outer ring and the bearing cover (attachment site) and inserting a ball into the recess. Has been. However, in this technique, since it is necessary to insert the ball in a state where a predetermined preload is applied in the recess, a high-precision processing technique and high assembly accuracy are required for the recess and the ball. There is a problem such as.

また、例えば特許文献２には、外輪外周に形成した凹溝にブリッジ形状を成す薄板弾性輪を嵌め込むことで、クリープの発生を防止する技術が提案されている。しかしながら、当該技術では、薄板弾性輪の形成に手間や時間がかかるだけで無く、凹溝及び薄板弾性輪の双方を高精度に加工して組み立てなければならないため、製造コストが上昇してしまうといった問題がある。   Further, for example, Patent Document 2 proposes a technique for preventing the occurrence of creep by fitting a thin plate elastic ring having a bridge shape into a concave groove formed on the outer periphery of the outer ring. However, in this technique, it takes not only labor and time to form a thin elastic ring, but also requires manufacturing and assembling both the groove and the thin elastic ring with high precision, resulting in an increase in manufacturing cost. There's a problem.

また、例えば特許文献３には、外輪外周に等間隔で凹部を形成し、ここにケース(取付部位)からピンを嵌め込むことで、クリープの発生を防止する技術が提案されている。しかしながら、当該技術では、凹部にピンを嵌め込むための貫通孔をケース(取付部位)に別途加工しなければならないと共に、組立時には、貫通孔と凹部とを正確に対向させる必要がある。このため、加工に要するコストが上昇するだけで無く、組み立ても面倒であり、また、軸受と取付部位の両方ともが肉厚の場合にしか適用することができない。
実開平４−１１０２２２号公報 実開平１−１４００２３号公報 実開昭６３−３５８１８号公報 For example, Patent Document 3 proposes a technique for preventing the occurrence of creep by forming recesses at equal intervals on the outer periphery of the outer ring and fitting a pin into the case (attachment site). However, in this technique, it is necessary to separately process a through hole for fitting the pin into the recess in the case (attachment site), and it is necessary to accurately face the through hole and the recess during assembly. For this reason, not only the cost required for processing increases, but also the assembly is troublesome, and it can be applied only when both the bearing and the mounting portion are thick.
Japanese Utility Model Publication No. 4-110222 Japanese Utility Model Laid-Open No. 1-10023 Japanese Utility Model Publication No. 63-35818

本発明は、このような問題を解決するためになされており、その目的は、短時間で簡単に組み立てることが可能であって、クリープの発生を確実に防止することが可能な低コストの軸受用クリープ防止機構を提供することにある。   The present invention has been made to solve such a problem, and an object of the present invention is to provide a low-cost bearing that can be easily assembled in a short time and can reliably prevent the occurrence of creep. It is to provide an anti-creep mechanism.

このような目的を達成するために、本発明は、相対回転可能に対向配置された軌道輪を有する軸受に設けられ、軌道輪と当該軌道輪が取り付けられる取付部位との相対すべりを防止するための軸受用クリープ防止機構であって、少なくとも一方の軌道輪の取付部位に取り付ける側の周面を一部窪ませて形成した窪み部と、当該窪み部と取付部位との間に介挿させるくさび機構とを備えており、くさび機構は、弾性変形可能な弾性部と、当該弾性部によって取付部位に押し付けられた状態に維持されるくさび部とを備えて構成されている。   In order to achieve such an object, the present invention is provided in a bearing having a bearing ring disposed so as to be relatively rotatable so as to prevent relative sliding between the bearing ring and a mounting portion to which the bearing ring is attached. A creeping prevention mechanism for a bearing, comprising: a recessed portion formed by partially recessing a peripheral surface on a mounting side of at least one bearing ring; and a wedge inserted between the recessed portion and the mounting portion The wedge mechanism is configured to include an elastic portion that can be elastically deformed and a wedge portion that is kept pressed against the attachment site by the elastic portion.

本発明では、くさび機構において、くさび部は、軌道輪と取付部位との相対すべりに伴って回転可能な転がり部材で構成しても良い。この場合、転がり部材は、窪み部と取付部位との間に介挿可能な保持器によって保持されている。また、本発明では、くさび機構において、弾性部とくさび部とを互いに一体的に形成しても良い。   In the present invention, in the wedge mechanism, the wedge portion may be constituted by a rolling member that can rotate in accordance with relative sliding between the race ring and the attachment portion. In this case, the rolling member is held by a cage that can be inserted between the recess and the attachment site. In the present invention, in the wedge mechanism, the elastic portion and the wedge portion may be formed integrally with each other.

本発明によれば、短時間で簡単に組み立てることが可能であって、クリープの発生を確実に防止することが可能な低コストの軸受用クリープ防止機構を実現することができる。
また、本発明によれば、軌道輪と取付部位との嵌め合い面(内輪と軸との嵌め合い面、外輪とハウジングとの嵌め合い面)において、その軸側(例えば、軸外周、外輪外周)のみにくさび機構用の加工を施せば良く、その穴側(例えば、内輪内周、ハウジング内周)には一切の加工が不要となる。ここで、軸側にくさび機構用の加工を施す方法としては、本発明のような窪み部を形成しても良いし、或いは、窪み部の代わりに例えば軸側の一部をストレートに切り欠いたり、切除したりするようにしても良い。この場合、穴側に同様の加工を施すことは手間がかかり面倒であるが、当該穴側を加工する必要がないというのは大きなメリットになる。 According to the present invention, it is possible to realize a low-cost bearing creep prevention mechanism that can be easily assembled in a short time and can reliably prevent the occurrence of creep.
Further, according to the present invention, on the mating surface (the mating surface between the inner ring and the shaft, the mating surface between the outer ring and the housing) of the raceway ring and the mounting portion, the shaft side (for example, the outer periphery of the shaft, the outer periphery of the outer ring) ) Only for the wedge mechanism, and the hole side (for example, inner ring inner periphery, housing inner periphery) does not require any processing. Here, as a method of performing processing for the wedge mechanism on the shaft side, a recess portion as in the present invention may be formed, or instead of the recess portion, for example, a part of the shaft side is cut straight. Or may be excised. In this case, it is troublesome and troublesome to perform the same processing on the hole side, but it is a great merit that there is no need to process the hole side.

以下、本発明の軸受用クリープ防止機構について、添付図面を参照して説明する。
図１(ａ),(ｂ)には、本発明の第１の実施の形態に係るクリープ防止機構が適用された軸受の構成例が示されており、当該軸受は、相対回転可能に対向配置された内輪２及び外輪４と、内外輪2,4間に転動自在に組み込まれた複数の転動体６とを備えている。なお、図面では、転動体６として“玉”を例示しているが“ころ”が適用される場合もある。また、内外輪2,4は、軸受の使用目的や使用環境に応じて、その一方を回転輪とし、その他方を静止輪として構成することができる。 The bearing creep prevention mechanism of the present invention will be described below with reference to the accompanying drawings.
FIGS. 1A and 1B show a configuration example of a bearing to which a creep prevention mechanism according to the first embodiment of the present invention is applied, and the bearings are arranged so as to be relatively rotatable. The inner ring 2 and the outer ring 4 are provided, and a plurality of rolling elements 6 are provided between the inner and outer rings 2 and 4 so as to roll freely. In the drawing, “balls” are illustrated as the rolling elements 6, but “rollers” may be applied. Also, the inner and outer rings 2, 4 can be configured as a rotating wheel and the other as a stationary ring, depending on the purpose and environment of use of the bearing.

このような軸受において、本実施の形態のクリープ防止機構は、内外輪2,4と当該内外輪2,4が取り付けられる取付部位との相対すべりを防止することができるように構成されている。取付部位としては、例えば内輪２が取り付けられる回転軸(図示しない)や、外輪４が取り付けられるハウジング８などを適用することができるが、ここでは取付部位の一例としてハウジング８を想定し、当該ハウジング８と外輪４との相対すべりを防止する場合について説明する。   In such a bearing, the creep prevention mechanism of the present embodiment is configured to prevent relative sliding between the inner and outer rings 2 and 4 and the mounting portion to which the inner and outer rings 2 and 4 are attached. For example, a rotating shaft (not shown) to which the inner ring 2 is attached, a housing 8 to which the outer ring 4 is attached, and the like can be applied as the attachment portion. Here, the housing 8 is assumed as an example of the attachment portion. The case where the relative sliding of 8 and the outer ring | wheel 4 is prevented is demonstrated.

この場合、クリープ防止機構は、外輪４のハウジング８に取り付ける側の周面４ｓを一部窪ませて形成した窪み部Ｇと、当該窪み部Ｇとハウジング８との間に介挿させるくさび機構とを備えている。窪み部Ｇは、幅の広い略矩形状を成して外輪４の周方向に延在しており、この中にくさび機構を収容させることができる。なお、窪み部Ｇの幅や深さ、長さなどの形状は、例えば外輪４やくさび機構の大きさや形状などに応じて任意に設定されるため、ここでは特に限定しない。また、窪み部Ｇの形成方法は、例えば外輪４の形成時に同時に形成しても良いし、外輪４の形成後にその周面４ｓを削って形成しても良い。   In this case, the creep prevention mechanism includes a recess portion G formed by partially recessing the peripheral surface 4 s on the side of the outer ring 4 attached to the housing 8, and a wedge mechanism inserted between the recess portion G and the housing 8. It has. The hollow portion G has a wide, substantially rectangular shape and extends in the circumferential direction of the outer ring 4, and the wedge mechanism can be accommodated therein. In addition, since shapes, such as the width | variety of the hollow part G, depth, and length, are arbitrarily set according to the magnitude | size, shape, etc. of the outer ring | wheel 4 or a wedge mechanism, for example, it does not specifically limit here. Moreover, the formation method of the hollow part G may be formed simultaneously with the formation of the outer ring 4, for example, or may be formed by cutting the peripheral surface 4 s after the formation of the outer ring 4.

一方、くさび機構は、弾性変形可能な弾性部と、当該弾性部によってハウジング８に押し付けられた状態に維持されるくさび部とを備えて構成されている。本実施の形態において、弾性部は、窪み部Ｇに収容可能な略矩形状のバネ部材１０で構成されており、また、くさび部は、外輪４とハウジング８との相対すべりに伴って回転可能な円柱形状の転がり部材１２で構成されている。   On the other hand, the wedge mechanism includes an elastic portion that can be elastically deformed and a wedge portion that is kept pressed against the housing 8 by the elastic portion. In the present embodiment, the elastic portion is configured by a substantially rectangular spring member 10 that can be accommodated in the recess portion G, and the wedge portion is rotatable in accordance with relative sliding between the outer ring 4 and the housing 8. The cylindrical rolling member 12 is formed.

ここで、くさび機構を窪み部Ｇとハウジング８との間に介挿させる方法について説明する。なお、かかる方法は一例であり、他の方法を適用することも可能である。
バネ部材１０は、窪み部Ｇに嵌め込む前のフリー状態において、自身の弾性力によってその両端１０ｅが互いに離間した状態(即ち、バネ部材１０全体が伸長した状態)となっている。かかる状態において、まず、両端１０ｅを互いに接近させる方向に押圧してバネ部材１０を弾性変形させることで、当該バネ部材１０全体を湾曲させて縮める。 Here, a method for inserting the wedge mechanism between the recess G and the housing 8 will be described. Note that this method is merely an example, and other methods can be applied.
The spring member 10 is in a state in which both ends 10e are separated from each other by its own elastic force (that is, the entire spring member 10 is extended) in a free state before being fitted into the recess G. In this state, first, the spring member 10 is elastically deformed by pressing both ends 10e toward each other, whereby the entire spring member 10 is bent and contracted.

次に、バネ部材１０全体を湾曲させた状態を維持しながら、当該バネ部材１０を窪み部Ｇの周方向に沿って挿入した後、その両端１０ｅへの押圧を解除して、当該バネ部材１０を解放する。このとき、バネ部材１０が自身の弾性力(戻り力)で伸長することで、その両端１０ｅが窪み部Ｇの周方向両側に当て付けられる。これにより、バネ部材１０は、その両端１０ｅを窪み部Ｇの周方向両側に当て付けた状態で嵌め込み固定される。   Next, the spring member 10 is inserted along the circumferential direction of the recess G while maintaining the curved state of the entire spring member 10, and then the pressure on both ends 10 e is released, and the spring member 10. To release. At this time, the spring member 10 is extended by its own elastic force (returning force), so that both ends 10 e are applied to both sides in the circumferential direction of the recessed portion G. Thereby, the spring member 10 is fitted and fixed in a state where both ends 10e are applied to both sides in the circumferential direction of the recessed portion G.

続いて、円柱形状の転がり部材１２をバネ部材１０に当て付けながら窪み部Ｇに挿入する。このとき、図１(ｂ)に示すように、転がり部材１２の回転中心軸Ｒが外輪４の周方向(軸受回転方向)を直交する向きとなるように挿入する。そして、外輪４の周面４ｓよりも内側に位置付けられる程度に転がり部材１２を押し込んだ状態を維持しつつ、外輪４をハウジング８に取り付ける。これにより、図１(ａ)に示すように、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。   Subsequently, the cylindrical rolling member 12 is inserted into the recess G while being applied to the spring member 10. At this time, as shown in FIG. 1B, the rotation center axis R of the rolling member 12 is inserted so that the circumferential direction (bearing rotation direction) of the outer ring 4 is orthogonal. Then, the outer ring 4 is attached to the housing 8 while maintaining the state in which the rolling member 12 is pushed in so as to be positioned inside the peripheral surface 4 s of the outer ring 4. Thereby, as shown to Fig.1 (a), a wedge mechanism can be inserted between the hollow part G and the housing 8. FIG.

この状態において、転がり部材１２は、バネ部材１０によってハウジング８に押し付けられた状態に維持される。このとき、バネ部材１０は、転がり部材１２が当て付けられた箇所Ｓ１がへこんで、他の箇所(両端１０ｅ側の箇所Ｓ２)が盛り上がった状態となっている。別の言い方をすると、転がり部材１２が当て付けられた箇所Ｓ１から軸受回転方向両側の他の箇所Ｓ２に向うに従って、バネ部材１０とハウジング８との隙間が小さくなった状態となっている。   In this state, the rolling member 12 is kept pressed against the housing 8 by the spring member 10. At this time, the spring member 10 is in a state where the part S1 where the rolling member 12 is applied is dented and the other part (the part S2 on both ends 10e side) is raised. In other words, the gap between the spring member 10 and the housing 8 is reduced from the location S1 where the rolling member 12 is applied toward the other location S2 on both sides of the bearing rotation direction.

この場合、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴って転がり部材１２は、バネ部材１０とハウジング８との間を回転し、やがて、バネ部材１０とハウジング８との隙間が小さくなった他の箇所Ｓ２において、バネ部材１０とハウジング８とに挟み込まれた状態に維持される。このとき、当該転がり部材１２が所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。   In this case, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the rolling member 12 rotates between the spring member 10 and the housing 8, and eventually the spring member 10 and the housing 8 are moved. In the other part S2 where the gap is reduced, the state is held between the spring member 10 and the housing 8. At this time, since the rolling member 12 exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further slipping (creeping).

以上、本実施の形態によれば、窪み部Ｇにバネ部材１０を嵌め込んで、そこに転がり部材１２をセットするだけで、転がり部材１２をバネ部材１０によってハウジング８に押し付けられた状態に維持することができる。これにより、従来に比べて短時間で簡単にクリープ防止機構を組み立てることができる。この場合、ハウジング８に対する転がり部材１２の押し付け力は、バネ部材１０の弾性力によって最適な状態に自動調整されるため、従来に比べてクリープの発生を確実に防止することができる。   As described above, according to the present embodiment, the rolling member 12 is simply pressed into the housing 8 by the spring member 10 by fitting the spring member 10 into the recess G and setting the rolling member 12 there. can do. Thereby, a creep prevention mechanism can be easily assembled in a short time compared with the past. In this case, since the pressing force of the rolling member 12 against the housing 8 is automatically adjusted to an optimum state by the elastic force of the spring member 10, the occurrence of creep can be reliably prevented as compared with the conventional case.

また、ハウジング８には一切手を加える必要は無く、外輪４の周面４ｓの一部に窪み部Ｇを加工するだけである。この場合、窪み部Ｇは、バネ部材１０を嵌め込むことができる程度に形成すれば良いので、その加工精度を高くする必要は無い。これにより、従来に比べて低コストのクリープ防止機構を実現することができる。   Further, it is not necessary to add any hand to the housing 8, and only the recess G is processed into a part of the peripheral surface 4s of the outer ring 4. In this case, since the hollow part G should just be formed to such an extent that the spring member 10 can be fitted, it is not necessary to increase the processing accuracy. Thereby, a low-cost creep prevention mechanism can be realized as compared with the conventional one.

なお、上述した実施の形態において、バネ部材１０及び転がり部材１２の材質について特に言及しなかったが、バネ部材１０としては、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。また、転がり部材１２としては、くさびの効果を発揮することができるような高い剛性の材料であれば、例えば金属材料や樹脂材料など任意の材料を適用することが可能である。   In the above-described embodiment, the material of the spring member 10 and the rolling member 12 is not particularly mentioned, but any material having elasticity (for example, a metal material or a resin material) is applied as the spring member 10. Is possible. In addition, as the rolling member 12, any material such as a metal material or a resin material can be applied as long as it is a highly rigid material capable of exhibiting the wedge effect.

また、上述した実施の形態では、１つの転がり部材１２を適用したが、これに限定されることは無く、例えば図１(ｃ)に示すように、複数の転がり部材１２を適用しても良い。この場合、バネ部材１０は、全ての転がり部材１２をハウジング８に押し付けることができるように構成し、窪み部Ｇに嵌め込み固定すれば良い。なお、このような他の構成に係るクリープ防止機構でも、上述した実施の形態と同様の効果を実現することができる。   In the embodiment described above, one rolling member 12 is applied. However, the present invention is not limited to this. For example, as shown in FIG. 1C, a plurality of rolling members 12 may be applied. . In this case, the spring member 10 may be configured such that all the rolling members 12 can be pressed against the housing 8 and fitted into the recess G to be fixed. Note that the same effect as that of the above-described embodiment can also be realized by the creep prevention mechanism according to such another configuration.

図２(ａ),(ｂ)には、本発明の第２の実施の形態に係るクリープ防止機構が適用された軸受の構成例が示されている。当該クリープ防止機構において、窪み部Ｇは、幅の狭い略矩形状を成して外輪４の周方向に延在しており、この中にくさび機構を収容させることができる。また、くさび機構において、弾性部は、圧縮コイルばね１４で構成されており、また、くさび部は、圧縮コイルばね１４の両側に配置された球形状の転がり部材１６で構成されている。   FIGS. 2A and 2B show a configuration example of a bearing to which the creep prevention mechanism according to the second embodiment of the present invention is applied. In the creep prevention mechanism, the recess G has a substantially rectangular shape with a narrow width and extends in the circumferential direction of the outer ring 4, and the wedge mechanism can be accommodated therein. Further, in the wedge mechanism, the elastic part is constituted by a compression coil spring 14, and the wedge part is constituted by a spherical rolling member 16 disposed on both sides of the compression coil spring 14.

ここで、窪み部Ｇは、その略中央部分が最も深く窪んでおり、その両側Ｇｓ(外輪４の周方向(軸受回転方向)に沿った両側)に向うに従って曲面状に浅くなり、外輪４の周面４ｓに連続している。別の言い方をすると、窪み部Ｇの中央部分でハウジング８との隙間が最も大きくなっており、そこから両側Ｇｓに向うに従って窪み部Ｇとハウジング８との隙間が曲線状に滑らかに小さくなっている。   Here, the substantially central portion of the hollow portion G is deepest, and becomes shallower in a curved surface toward both sides Gs (both sides along the circumferential direction of the outer ring 4 (bearing rotation direction)). It is continuous with the peripheral surface 4s. In other words, the gap between the recess 8 and the housing 8 is the largest at the central portion of the recess G, and the clearance between the recess G and the housing 8 decreases smoothly in a curved line from there toward both sides Gs. Yes.

また、圧縮コイルばね１４は、外輪４の周方向(軸受回転方向)に沿って平行に窪み部Ｇ内に配置されており、当該圧縮コイルばね１４の両側に転がり部材１６が配置されている(図２(ｂ))。この場合、圧縮コイルばね１４と転がり部材１６とは、互いに連結させても良いし、或いは、互いに連結させないで、圧縮コイルばね１４の両端に転がり部材１６を当て付けるように配置させても良い。   The compression coil spring 14 is disposed in the recess G in parallel along the circumferential direction (bearing rotation direction) of the outer ring 4, and rolling members 16 are disposed on both sides of the compression coil spring 14 ( FIG. 2 (b)). In this case, the compression coil spring 14 and the rolling member 16 may be connected to each other, or may be arranged so as to apply the rolling member 16 to both ends of the compression coil spring 14 without being connected to each other.

ここで、くさび機構を窪み部Ｇとハウジング８との間に介挿させる方法は、例えば双方の転がり部材１６を接近させる方向に押圧し、圧縮コイルばね１４を弾性変形させて縮めた状態で窪み部Ｇに挿入する。そして、かかる状態を維持しつつ、外輪４をハウジング８に取り付ける。これにより、図２(ａ)に示すように、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。この状態において、各転がり部材１６は、圧縮コイルばね１４によって窪み部Ｇの両側Ｇｓに向けて押圧される。窪み部Ｇは、その両側Ｇｓに向うに従ってハウジング８との隙間が小さくなっている。このため、各転がり部材１６は、圧縮コイルばね１４によってハウジング８に押し付けられた状態に維持されることになる。   Here, the method of inserting the wedge mechanism between the recess portion G and the housing 8 is, for example, pressing in the direction in which both the rolling members 16 are approached and the compression coil spring 14 is elastically deformed and contracted. Insert into part G. The outer ring 4 is attached to the housing 8 while maintaining this state. Thereby, as shown in FIG. 2A, the wedge mechanism can be inserted between the recessed portion G and the housing 8. In this state, each rolling member 16 is pressed toward both sides Gs of the recess G by the compression coil spring 14. As for the hollow part G, the clearance gap with the housing 8 becomes small as it goes to the both sides Gs. For this reason, each rolling member 16 is maintained in a state of being pressed against the housing 8 by the compression coil spring 14.

かかる構成において、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴って転がり部材１６は、窪み部Ｇとハウジング８との間を回転するが、やがて、当該窪み部Ｇの両側Ｇｓと圧縮コイルばね１４とハウジング８との間に挟みこまれた状態に維持される。このとき、当該転がり部材１６が所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。   In such a configuration, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the rolling member 16 rotates between the recess portion G and the housing 8, but eventually both sides of the recess portion G. It is maintained in a state of being sandwiched between Gs, the compression coil spring 14 and the housing 8. At this time, since the rolling member 16 exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further sliding (creeping).

以上、本実施の形態によれば、窪み部Ｇに圧縮コイルばね１４と転がり部材１６とをセットするだけで、転がり部材１６を圧縮コイルばね１４によってハウジング８に押し付けられた状態に維持することができる。これにより、従来に比べて短時間で簡単にクリープ防止機構を組み立てることができる。この場合、ハウジング８に対する転がり部材１６の押し付け力は、圧縮コイルばね１４の弾性力によって最適な状態に自動調整されるため、従来に比べてクリープの発生を確実に防止することができる。なお、その他の効果は、上述した第１の実施の形態と同様であるため、その説明は省略する。   As described above, according to the present embodiment, only by setting the compression coil spring 14 and the rolling member 16 in the recess G, the rolling member 16 can be maintained in a state of being pressed against the housing 8 by the compression coil spring 14. it can. Thereby, a creep prevention mechanism can be easily assembled in a short time compared with the past. In this case, since the pressing force of the rolling member 16 against the housing 8 is automatically adjusted to an optimum state by the elastic force of the compression coil spring 14, the occurrence of creep can be reliably prevented as compared with the conventional case. Since other effects are the same as those of the first embodiment described above, description thereof is omitted.

なお、上述した実施の形態において、窪み部Ｇは、その中央部分から両側Ｇｓに向うに従ってハウジング８との隙間を曲線状に滑らかに小さくさせる構成としたが、これに代えて例えば図２(ｃ)に示すように、窪み部Ｇを、その中央部分から両側Ｇｓに向うに従ってハウジング８との隙間を直線状に小さくさせる略Ｖ字状の構成としても良い。   In the above-described embodiment, the recess G has a configuration in which the gap with the housing 8 is smoothly reduced in a curved shape from the central portion toward both sides Gs. Instead, for example, FIG. ), The recess G may have a substantially V-shaped configuration in which the gap with the housing 8 is linearly reduced from the central portion toward both sides Gs.

また、例えば図２(ｄ)に示すように、窪み部Ｇを、その中央部分から両側Ｇｓに向うに従ってストレートに構成しても良い。この場合、窪み部Ｇがストレートであってもハウジング８が円形であるため、窪み部Ｇとハウジング８との隙間は、その中央部分から両側Ｇｓに向うに従って小さくなる。これにより、転がり部材１６によって所謂くさびの効果を発揮させることができる。   Further, for example, as shown in FIG. 2 (d), the recess G may be configured to be straight from the central portion toward both sides Gs. In this case, since the housing 8 is circular even if the hollow portion G is straight, the gap between the hollow portion G and the housing 8 becomes smaller from the central portion toward both sides Gs. As a result, the rolling member 16 can exhibit a so-called wedge effect.

また、上述した実施の形態において、圧縮コイルばね１４及び転がり部材１６の材質について特に言及しなかったが、圧縮コイルばね１４としては、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。また、転がり部材１６としては、くさびの効果を発揮することができるような高い剛性の材料であれば、例えば金属材料や樹脂材料など任意の材料を適用することが可能である。   In the above-described embodiment, the compression coil spring 14 and the material of the rolling member 16 are not particularly mentioned. However, the compression coil spring 14 is an arbitrary material having elasticity (for example, a metal material or a resin material). It is possible to apply. Further, as the rolling member 16, any material such as a metal material or a resin material can be applied as long as it is a material having high rigidity capable of exhibiting the wedge effect.

また、上述した実施の形態では、１つの圧縮コイルばね１４の両側に転がり部材１６を１つずつ配置した構成を例示したが、これに限定されることは無く、例えば圧縮コイルばね１４を窪み部Ｇの幅方向(外輪４の周方向を横断する方向)に複数並列させ、それぞれの圧縮コイルばね１４の両側に転がり部材１６を配置した構成としても良い。   In the above-described embodiment, the configuration in which the rolling members 16 are arranged one by one on both sides of one compression coil spring 14 is exemplified. However, the present invention is not limited to this. For example, the compression coil spring 14 is recessed. It is also possible to adopt a configuration in which a plurality of rolling members 16 are arranged in parallel in the width direction of G (the direction crossing the circumferential direction of the outer ring 4), and on both sides of each compression coil spring 14.

図３(ａ)には、本発明の第１の変形例に係るクリープ防止機構が適用された軸受の構成例が示されている。本変形例のクリープ防止機構は、上述した第１の実施の形態のくさび機構において、くさび部(円柱形状の転がり部材１２)を窪み部Ｇとハウジング８との間に介挿可能な保持器Ｈによって保持して構成されている。この場合、保持器Ｈには、複数(例えば２つ)の転がり部材１２を互いに並列して回転自在に保持するポケットＨｐが形成されている。ポケットＨｐには、各転がり部材１２の両端から突出した回転軸１２ａを支持可能な支持部(図示しない)が設けられており、当該ポケットＨｐに組み込まれた各転がり部材１２は、その回転軸１２ａが支持部で支持される。   FIG. 3A shows a configuration example of a bearing to which the creep prevention mechanism according to the first modification of the present invention is applied. The creep prevention mechanism according to the present modification is the same as the above-described wedge mechanism according to the first embodiment, except that the wedge portion (the cylindrical rolling member 12) can be inserted between the recess portion G and the housing 8. Is held and configured. In this case, the retainer H is formed with a pocket Hp that rotatably holds a plurality of (for example, two) rolling members 12 in parallel with each other. The pocket Hp is provided with a support portion (not shown) capable of supporting the rotating shaft 12a protruding from both ends of each rolling member 12, and each rolling member 12 incorporated in the pocket Hp has its rotating shaft 12a. Is supported by the support portion.

また、くさび機構の弾性部は、略矩形の薄板状部材をＵ字状に曲げたバネ部材１８で構成されている。バネ部材１８は、その屈曲部１８ｅを保持器Ｈ(ポケットＨｐ)に保持された２つの転がり部材１２の間に介挿させるようになっている。この場合、屈曲部１８ｅを互いに接近させる方向に押圧してバネ部材１８を弾性変形させて縮めた状態で、当該屈曲部１８ｅを転がり部材１２相互間に介挿した後、屈曲部１８ｅへの押圧を解除して、当該ばね部材１８を解放する。このとき、屈曲部１８ｅ相互の戻り力が各転がり部材１２に作用することで、各転がり部材１２は、バネ部材１８の付勢力を受けた状態で保持器Ｈ(ポケットＨｐ)に保持される。   The elastic part of the wedge mechanism is constituted by a spring member 18 obtained by bending a substantially rectangular thin plate member into a U shape. The spring member 18 is configured such that the bent portion 18e is interposed between the two rolling members 12 held in the cage H (pocket Hp). In this case, the bent portion 18e is pressed between the rolling members 12 in a state where the bent portion 18e is pressed in the direction in which the bent portions 18e approach each other and the spring member 18 is elastically deformed and contracted, and then the bent portion 18e is pressed Is released to release the spring member 18. At this time, the return force between the bent portions 18e acts on each rolling member 12, so that each rolling member 12 is held in the cage H (pocket Hp) in a state of receiving the biasing force of the spring member 18.

これにより、各転がり部材１２は、バネ部材１８の付勢力を受けた状態でポケットＨｐから脱落すること無く保持器Ｈに保持される。この状態において、各転がり部材１２は、バネ部材１８の付勢力に抗してポケットＨｐの範囲内を移動可能な状態となっている。ここで、外輪４の外周４ｓを横断する方向に貫通して窪み部Ｇが形成されている場合、外輪４をハウジング８(図１(ａ))に取り付けた状態で、当該外輪４とハウジング８との間に窪み部Ｇが貫通した状態となる。この場合、外輪４をハウジング８に取り付けた後に、保持器Ｈを窪み部Ｇに挿入することができる。   Accordingly, each rolling member 12 is held by the cage H without being dropped from the pocket Hp in a state where the urging force of the spring member 18 is received. In this state, each rolling member 12 is movable in the range of the pocket Hp against the biasing force of the spring member 18. Here, when the hollow part G is formed so as to penetrate the outer ring 4 in the direction crossing the outer periphery 4 s, the outer ring 4 and the housing 8 are mounted with the outer ring 4 attached to the housing 8 (FIG. 1A). It will be in the state which the hollow part G penetrated between. In this case, the cage H can be inserted into the recess G after the outer ring 4 is attached to the housing 8.

例えば、転がり部材１２を互いに接近させる方向に押圧してバネ部材１８を弾性変形させることで、当該バネ部材１８全体を湾曲させて縮めた状態で保持器Ｈを窪み部Ｇに挿入する。このとき、転がり部材１２の回転軸１２ａが外輪４の周方向(軸受回転方向)を直交する向きとなるように、保持器Ｈを窪み部Ｇに挿入する。そして、保持器Ｈを窪み部Ｇに挿入した後、転がり部材１２への押圧を解除してバネ部材１８を解放すると、当該バネ部材１８が自身の弾性力(戻り力)で伸長することで、転がり部材１２を窪み部Ｇとハウジング８とに押し付けた状態に維持することができる。これにより、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。   For example, the retainer H is inserted into the hollow portion G in a state where the entire spring member 18 is curved and contracted by pressing the rolling members 12 in a direction in which the rolling members 12 approach each other and elastically deforming the spring member 18. At this time, the retainer H is inserted into the recess G so that the rotation shaft 12a of the rolling member 12 is in a direction orthogonal to the circumferential direction (bearing rotation direction) of the outer ring 4. Then, after inserting the retainer H into the recess G, when the spring member 18 is released by releasing the pressure on the rolling member 12, the spring member 18 is extended by its own elastic force (return force). The rolling member 12 can be maintained in a state where it is pressed against the recess G and the housing 8. Thereby, the wedge mechanism can be inserted between the recess G and the housing 8.

なお、窪み部Ｇや保持器Ｈの大きさや形状について特に言及しなかったが、例えば図に示すような矩形状の保持器Ｈであれば、これに整合した矩形状の窪み部Ｇを外輪４の外周４ｓに形成すれば良い。要するに、任意の形状の保持器Ｈを挿入可能な形状の窪み部Ｈであれば特に限定されることは無い。また、バネ部材１８の材質については、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。   In addition, although it did not mention in particular about the magnitude | size and shape of the hollow part G or the holder | retainer H, if the rectangular holder | retainer H as shown in a figure, for example, the rectangular-shaped hollow part G matched with this is set to the outer ring | wheel 4 The outer periphery 4s may be formed. In short, there is no particular limitation as long as the hollow portion H has a shape into which a cage H having an arbitrary shape can be inserted. As the material of the spring member 18, any material having elasticity (for example, a metal material or a resin material) can be applied.

かかる構成において、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴って転がり部材１２は、窪み部Ｇとハウジング８との間を回転するが、やがて、当該窪み部Ｇとバネ部材１８(屈曲部１８ｅ)とハウジング８との間に挟みこまれた状態に維持される。このとき、転がり部材１２が所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。   In such a configuration, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the rolling member 12 rotates between the recess G and the housing 8, but eventually the recess G and the spring are rotated. The state of being sandwiched between the member 18 (bent portion 18e) and the housing 8 is maintained. At this time, since the rolling member 12 exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further slipping (creeping).

以上、第１の変形例によれば、外輪４をハウジング８(図１(ａ))に取り付けた後に、窪み部Ｇに保持器Ｈを挿入するだけで、くさび機構を窪み部Ｇとハウジング８との間に高精度に介挿させることができる。このため、従来に比べて短時間で簡単にクリープ防止機構を組み立てることができる。この場合、ハウジング８に対する転がり部材１２の押し付け力は、バネ部材１８(屈曲部１８ｅ)の弾性力によって最適な状態に自動調整されるため、従来に比べてクリープの発生を確実に防止することができる。なお、その他の効果は、上述した第１の実施の形態と同様であるため、その説明は省略する。   As described above, according to the first modification, after the outer ring 4 is attached to the housing 8 (FIG. 1A), the wedge mechanism is simply inserted into the recess G so that the wedge mechanism is connected to the recess G and the housing 8. Can be inserted with high accuracy. For this reason, a creep prevention mechanism can be easily assembled in a short time compared with the past. In this case, since the pressing force of the rolling member 12 against the housing 8 is automatically adjusted to an optimum state by the elastic force of the spring member 18 (bending portion 18e), the occurrence of creep can be reliably prevented as compared with the conventional case. it can. Since other effects are the same as those of the first embodiment described above, description thereof is omitted.

図３(ｂ)には、本発明の第２の変形例に係るクリープ防止機構が適用された軸受の構成例が示されている。本変形例のクリープ防止機構は、上述した第２の実施の形態のくさび機構において、くさび部(球形状の転がり部材１６)を窪み部Ｇとハウジング８との間に介挿可能な保持器Ｈによって保持して構成されている。この場合、保持器Ｈには、複数(例えば２つ)の転がり部材１６を互いに並列して回転自在に保持するポケットＨｐが形成されている。   FIG. 3B shows a configuration example of a bearing to which the creep prevention mechanism according to the second modification of the present invention is applied. The creep prevention mechanism according to the present modification is the same as the above-described wedge mechanism according to the second embodiment, except that the wedge portion (spherical rolling member 16) can be inserted between the recess portion G and the housing 8. Is held and configured. In this case, the holder H is formed with a pocket Hp that holds a plurality of (for example, two) rolling members 16 in parallel with each other so as to be rotatable.

また、くさび機構の弾性部は、略矩形の薄板状部材をＷ字状に曲げたバネ部材２０で構成されている。バネ部材２０は、その円弧状屈曲部２０ｅを保持器Ｈ(ポケットＨｐ)に保持された２つの転がり部材１６の間に介挿させるようになっている。この場合、円弧状屈曲部２０ｅを互いに接近させる方向に押圧してバネ部材２０を弾性変形させて縮めた状態で、当該円弧状屈曲部２０ｅを転がり部材１６相互間に介挿した後、円弧状屈曲部２０ｅへの押圧を解除して、当該ばね部材２０を解放する。このとき、円弧状屈曲部２０ｅ相互の戻り力が各転がり部材１６に作用することで、各転がり部材１６は、バネ部材２０の付勢力を受けた状態で保持器Ｈ(ポケットＨｐ)に保持される。   Further, the elastic part of the wedge mechanism is constituted by a spring member 20 obtained by bending a substantially rectangular thin plate member into a W shape. The spring member 20 is configured such that the arcuate bent portion 20e is interposed between the two rolling members 16 held in the cage H (pocket Hp). In this case, after the arc-shaped bent portion 20e is pressed in the direction in which the arc-shaped bent portions 20e approach each other and the spring member 20 is elastically deformed and contracted, the arc-shaped bent portion 20e is inserted between the rolling members 16 and then arc-shaped. The pressure on the bent portion 20e is released, and the spring member 20 is released. At this time, the return force between the arcuate bent portions 20e acts on each rolling member 16, so that each rolling member 16 is held in the cage H (pocket Hp) in a state of receiving the biasing force of the spring member 20. The

これにより、各転がり部材１６は、バネ部材２０の付勢力を受けた状態でポケットＨｐから脱落すること無く保持器Ｈに保持される。この状態において、各転がり部材１６は、バネ部材２０の付勢力に抗してポケットＨｐの範囲内を移動可能な状態となっている。ここで、外輪４の外周４ｓを横断する方向に貫通して窪み部Ｇが形成されている場合、外輪４をハウジング８(図１(ａ))に取り付けた状態で、当該外輪４とハウジング８との間に窪み部Ｇが貫通した状態となる。この場合、外輪４をハウジング８に取り付けた後に、保持器Ｈを窪み部Ｇに挿入することができる。   Thereby, each rolling member 16 is held by the retainer H without dropping from the pocket Hp in a state where the urging force of the spring member 20 is received. In this state, each rolling member 16 is in a state in which it can move within the range of the pocket Hp against the urging force of the spring member 20. Here, when the hollow part G is formed so as to penetrate the outer ring 4 in the direction crossing the outer periphery 4 s, the outer ring 4 and the housing 8 are mounted with the outer ring 4 attached to the housing 8 (FIG. 1A). It will be in the state which the hollow part G penetrated between. In this case, the cage H can be inserted into the recess G after the outer ring 4 is attached to the housing 8.

例えば、転がり部材１６を互いに接近させる方向に押圧してバネ部材２０を弾性変形させることで、当該バネ部材２０全体を湾曲させて縮めた状態で保持器Ｈを窪み部Ｇに挿入する。このとき、２つの転がり部材１６が外輪４の周方向(軸受回転方向)に沿って整列する向きとなるように、保持器Ｈを窪み部Ｇに挿入する。そして、保持器Ｈを窪み部Ｇに挿入した後、転がり部材１６への押圧を解除してバネ部材２０を解放すると、当該バネ部材２０が自身の弾性力(戻り力)で伸長することで、転がり部材１６を窪み部Ｇとハウジング８とに押し付けた状態に維持することができる。これにより、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。   For example, the retainer H is inserted into the recessed portion G in a state where the entire spring member 20 is bent and contracted by pressing the rolling members 16 in a direction in which the rolling members 16 approach each other and elastically deforming the spring member 20. At this time, the retainer H is inserted into the recess G so that the two rolling members 16 are aligned along the circumferential direction of the outer ring 4 (bearing rotation direction). Then, after inserting the retainer H into the recess G, when the spring member 20 is released by releasing the pressure on the rolling member 16, the spring member 20 expands with its own elastic force (return force). The rolling member 16 can be maintained in a state of being pressed against the recess G and the housing 8. Thereby, the wedge mechanism can be inserted between the recess G and the housing 8.

かかる構成において、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴って転がり部材１６は、窪み部Ｇとハウジング８との間を回転するが、やがて、当該窪み部Ｇとバネ部材２０(円弧状屈曲部２０ｅ)とハウジング８との間に挟みこまれた状態に維持される。このとき、転がり部材１２が所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。なお、本変形例において、その他の構成や効果は、上述した第１の変形例と同様であるため、その説明は省略する。また、バネ部材２０の材質については、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。   In such a configuration, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the rolling member 16 rotates between the recess portion G and the housing 8, but eventually the recess portion G and the spring. The state of being sandwiched between the member 20 (arc-shaped bent portion 20e) and the housing 8 is maintained. At this time, since the rolling member 12 exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further slipping (creeping). In addition, in this modification, since another structure and effect are the same as that of the 1st modification mentioned above, the description is abbreviate | omitted. As the material of the spring member 20, any material having elasticity (for example, a metal material or a resin material) can be applied.

図３(ｃ)には、本発明の第３の変形例に係るクリープ防止機構が適用された軸受の構成例が示されている。本変形例のクリープ防止機構は、上述した第１の実施の形態のくさび機構において、くさび部(円柱形状の転がり部材１２)を弾性部に直接保持して構成されている。この場合、弾性部は、複数(例えば２つ)の転がり部材１２を互いに並列して回転自在に保持可能な機能を有するバネ部材２２で構成されている。バネ部材２２は、略矩形の薄板状部材をＵ字状に曲げて構成されており、その屈曲端両側には、各転がり部材１２の両端から突出した回転軸１２ａを支持可能な支持部２２ａが一体成形されている。   FIG. 3C shows a configuration example of a bearing to which the creep prevention mechanism according to the third modification of the present invention is applied. The creep prevention mechanism of this modification is configured by directly holding the wedge part (the cylindrical rolling member 12) on the elastic part in the wedge mechanism of the first embodiment described above. In this case, the elastic portion is constituted by a spring member 22 having a function capable of rotatably holding a plurality of (for example, two) rolling members 12 in parallel with each other. The spring member 22 is configured by bending a substantially rectangular thin plate member into a U shape, and support portions 22a capable of supporting the rotating shafts 12a protruding from both ends of each rolling member 12 are provided on both sides of the bent end. It is integrally molded.

かかる構成によれば、各転がり部材１２をバネ部材２２に組み付けて、その支持部２２ａで回転軸１２ａを支持することにより、各転がり部材１２をバネ部材２２に対して弾性的に保持させることができる。なお、回転軸１２ａを支持部２２ａで支持する方法は、例えば回転軸１２ａを抱きかかえるように支持部２２ａを塑性変形させたり、或いは、回転軸１２ａを支持部２２ａに当て付けた状態で、その周りに止め輪を増設したりする方法など、任意の方法を適用することが可能である。要するに、バネ部材２２に対して各転がり部材１２を回転自在に保持できれば、その方法が限定されることは無い。   According to this configuration, each rolling member 12 is assembled to the spring member 22 and the rotating shaft 12a is supported by the support portion 22a, whereby each rolling member 12 can be elastically held with respect to the spring member 22. it can. In addition, the method of supporting the rotating shaft 12a with the support portion 22a is, for example, in a state where the supporting portion 22a is plastically deformed so as to hold the rotating shaft 12a or the rotating shaft 12a is applied to the supporting portion 22a. Arbitrary methods, such as a method of adding a retaining ring around, can be applied. In short, as long as each rolling member 12 can be rotatably held with respect to the spring member 22, the method is not limited.

ここで、外輪４の外周４ｓを横断する方向に貫通して窪み部Ｇが形成されている場合、外輪４をハウジング８(図１(ａ))に取り付けた状態で、当該外輪４とハウジング８との間に窪み部Ｇが貫通した状態となる。この場合、外輪４をハウジング８に取り付けた後に、バネ部材２２を窪み部Ｇに挿入することができる。なお、本変形例(図３(ｃ))では、窪み部Ｇに代えて、例えば外輪４の外周４ｓの一部をストレートに切り欠いたり、切除したりするようにしても良い。   Here, when the hollow part G is formed so as to penetrate the outer ring 4 in the direction crossing the outer periphery 4 s, the outer ring 4 and the housing 8 are mounted with the outer ring 4 attached to the housing 8 (FIG. 1A). It will be in the state which the hollow part G penetrated between. In this case, the spring member 22 can be inserted into the recess G after the outer ring 4 is attached to the housing 8. In this modified example (FIG. 3C), instead of the hollow portion G, for example, a part of the outer periphery 4s of the outer ring 4 may be cut out straight or cut off.

例えば、転がり部材１２を互いに接近させる方向に押圧してバネ部材２２を弾性変形させることで、当該バネ部材２２全体を湾曲させて縮めた状態で窪み部Ｇに挿入する。このとき、転がり部材１２の回転軸１２ａが外輪４の周方向(軸受回転方向)を直交する向きとなるように、転がり部材１２と共にバネ部材２２を窪み部Ｇに挿入する。そして、バネ部材２２を窪み部Ｇに挿入した後、転がり部材１２への押圧を解除してバネ部材２２を解放すると、当該バネ部材２２が自身の弾性力(戻り力)で伸長することで、転がり部材１２を窪み部Ｇとハウジング８とに押し付けた状態に維持することができる。これにより、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。   For example, the spring member 22 is elastically deformed by pressing the rolling members 12 in a direction in which the rolling members 12 approach each other, whereby the whole spring member 22 is curved and contracted and inserted into the recess G. At this time, the spring member 22 is inserted into the recess G together with the rolling member 12 so that the rotating shaft 12a of the rolling member 12 is oriented in a direction orthogonal to the circumferential direction (bearing rotating direction) of the outer ring 4. Then, after inserting the spring member 22 into the recess G, when the spring member 22 is released by releasing the pressure on the rolling member 12, the spring member 22 expands with its own elastic force (return force). The rolling member 12 can be maintained in a state where it is pressed against the recess G and the housing 8. Thereby, the wedge mechanism can be inserted between the recess G and the housing 8.

かかる構成において、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴って転がり部材１２は、窪み部Ｇとハウジング８との間を回転するが、やがて、当該窪み部Ｇとバネ部材２２とハウジング８との間に挟みこまれた状態に維持される。このとき、転がり部材１２が所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。なお、本変形例において、その他の構成や効果は、上述した第１の変形例と同様であるため、その説明は省略する。また、バネ部材２２の材質については、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。   In such a configuration, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the rolling member 12 rotates between the recess G and the housing 8, but eventually the recess G and the spring are rotated. The state of being sandwiched between the member 22 and the housing 8 is maintained. At this time, since the rolling member 12 exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further slipping (creeping). In addition, in this modification, since another structure and effect are the same as that of the 1st modification mentioned above, the description is abbreviate | omitted. As the material of the spring member 22, any material having elasticity (for example, a metal material or a resin material) can be applied.

図４(ａ),(ｂ)には、本発明の第３の実施の形態に係るクリープ防止機構が適用された軸受の構成例が示されている。当該クリープ防止機構は、外輪４のハウジング８に取り付ける側の周面４ｓを一部ストレートに切り欠いて形成された窪み部Ｇと、当該窪み部Ｇとハウジング８との間に介挿させるくさび機構とを備えている。なお、窪み部Ｇの切欠幅や深さ、切欠広さなどは、例えば外輪４やくさび機構の大きさや形状などに応じて任意に設定されるため、ここでは特に限定しない。また、窪み部Ｇの形成方法は、例えば外輪４の形成時に同時に形成しても良いし、外輪４の形成後にその周面４ｓを削って形成しても良い。   FIGS. 4A and 4B show a configuration example of a bearing to which the creep prevention mechanism according to the third embodiment of the present invention is applied. The creep prevention mechanism includes a hollow portion G formed by partially cutting a peripheral surface 4s on the side of the outer ring 4 attached to the housing 8, and a wedge mechanism that is interposed between the hollow portion G and the housing 8. And. Note that the notch width, depth, notch width, and the like of the recessed portion G are arbitrarily set according to the size and shape of the outer ring 4 and the wedge mechanism, and are not particularly limited here. Moreover, the formation method of the hollow part G may be formed simultaneously with the formation of the outer ring 4, for example, or may be formed by cutting the peripheral surface 4 s after the formation of the outer ring 4.

一方、くさび機構２４は、弾性変形可能な弾性部２４ａと、当該弾性部２４ａによってハウジング８に押し付けられた状態に維持されるくさび部２４ｂとを備えている。くさび部２４ｂは、弾性部２４ａの両側に配置されており、これら弾性部２４ａとくさび部２４ｂとは、互いに一体的に形成されている。この場合、くさび部２４ｂは、例えば略矩形の薄板状部材の両側を屈曲させて(丸めて)形成されている。一方、弾性部２４ａは、薄板状部材の中央部分をくさび部２４ｂの屈曲方向に湾曲させると共に、部分的に切欠Ｐ１や穿孔Ｐ２が施されている。このように、切欠Ｐ１や穿孔Ｐ２を施すことで、弾性部２４ａに弾性を持たせることができる。   On the other hand, the wedge mechanism 24 includes an elastic portion 24a that can be elastically deformed and a wedge portion 24b that is kept pressed against the housing 8 by the elastic portion 24a. The wedge portion 24b is disposed on both sides of the elastic portion 24a, and the elastic portion 24a and the wedge portion 24b are integrally formed with each other. In this case, the wedge portion 24b is formed by bending (rounding) both sides of a substantially rectangular thin plate member, for example. On the other hand, the elastic portion 24a bends the central portion of the thin plate member in the bending direction of the wedge portion 24b, and is partially provided with notches P1 and perforations P2. Thus, the elastic part 24a can be given elasticity by providing the notches P1 and the perforations P2.

なお、図面には、一対の切欠Ｐ１と１つの穿孔Ｐ２とが例示されているが、その大きさや形状、或いは、個数を増減変更することで、軸受の使用目的や使用環境に応じて弾性部２４ａの弾性に強弱を与えることができる。この場合、切欠Ｐ１や穿孔Ｐ２は、くさび機構２４の形成時に同時に形成しても良いし、或いは、くさび機構２４の形成後に、弾性部２４ａに切欠や穿孔しても良い。また、くさび機構２４の材質としては、弾性を有する任意の材料(例えば、金属材料や樹脂材料など)を適用することが可能である。   In addition, although a pair of notch P1 and one perforation P2 are illustrated in drawing, the elastic part is changed according to the use purpose and use environment of a bearing by increasing / decreasing the magnitude | size, shape, or number of objects. The elasticity of 24a can be given strength. In this case, the notch P1 and the perforation P2 may be formed simultaneously with the formation of the wedge mechanism 24, or may be formed in the elastic portion 24a after the formation of the wedge mechanism 24. Further, as the material of the wedge mechanism 24, any material having elasticity (for example, a metal material, a resin material, etc.) can be applied.

ここで、くさび機構を窪み部Ｇとハウジング８との間に介挿させる方法について説明する。なお、かかる方法は一例であり、他の方法を適用することも可能である。
くさび機構２４は、窪み部Ｇに嵌め込む前のフリー状態において、弾性部２４ａの弾性力によってその両端のくさび部２４ｂが互いに離間した状態(即ち、くさび機構２４全体が伸長した状態)となっている。また、上述したように、窪み部Ｇは、外輪４の周面４ｓを一部ストレートに切り欠いて形成されているため、当該外輪４をハウジング８に取り付けた状態で、外輪４とハウジング８との間に窪み部Ｇが貫通した状態となる。この場合、外輪４をハウジング８に取り付けた後に、くさび機構２４を窪み部Ｇに挿入することができる。 Here, a method for inserting the wedge mechanism between the recess G and the housing 8 will be described. Note that this method is merely an example, and other methods can be applied.
The wedge mechanism 24 is in a state in which the wedge portions 24b at both ends thereof are separated from each other by the elastic force of the elastic portion 24a in a free state before being fitted into the recess portion G (that is, the wedge mechanism 24 as a whole is extended). Yes. In addition, as described above, the recess portion G is formed by partially cutting the peripheral surface 4s of the outer ring 4 in a straight manner, so that the outer ring 4 and the housing 8 It will be in the state which the hollow part G penetrated between. In this case, the wedge mechanism 24 can be inserted into the recess G after the outer ring 4 is attached to the housing 8.

かかる状態において、くさび部２４ｂを互いに接近させる方向に押圧して弾性部２４ａを弾性変形させることで、当該くさび機構２４全体を湾曲させて縮めて窪み部Ｇに挿入する。このとき、２つのくさび部２４ｂが外輪４の周方向(軸受回転方向)に沿って整列する向きとなるように、くさび機構２４を窪み部Ｇに挿入する。そして、くさび機構２４を窪み部Ｇに挿入した後、くさび部２４ｂへの押圧を解除して弾性部２４ａを解放すると、当該弾性部２４ａが自身の弾性力(戻り力)で伸長することで、くさび部２４ｂを窪み部Ｇとハウジング８とに押し付けた状態に維持することができる。これにより、くさび機構を窪み部Ｇとハウジング８との間に介挿させることができる。   In this state, the wedge portion 24b is pressed in the direction in which the wedge portions 24b approach each other to elastically deform the elastic portion 24a, so that the entire wedge mechanism 24 is bent and contracted and inserted into the recessed portion G. At this time, the wedge mechanism 24 is inserted into the recess portion G so that the two wedge portions 24b are aligned along the circumferential direction (bearing rotation direction) of the outer ring 4. Then, after the wedge mechanism 24 is inserted into the recess G, when the elastic portion 24a is released by releasing the pressure on the wedge portion 24b, the elastic portion 24a expands with its own elastic force (return force). The wedge portion 24b can be maintained in a state where it is pressed against the recessed portion G and the housing 8. Thereby, the wedge mechanism can be inserted between the recess G and the housing 8.

かかる構成において、軸受回転中に外輪４とハウジング８とが相対すべりすると、これに伴ってくさび部２４ｂは、窪み部Ｇとハウジング８との間を摺動するが、やがて、当該窪み部Ｇとハウジング８との間に挟みこまれた状態に維持される。このとき、くさび部２４ｂが所謂くさびの効果を発揮することで、それ以上、外輪４とハウジング８とが相対すべり(クリープ)することを防止することができる。   In such a configuration, when the outer ring 4 and the housing 8 slide relative to each other during the rotation of the bearing, the wedge portion 24b slides between the recess G and the housing 8 along with this, but eventually the recess G The state of being sandwiched between the housing 8 is maintained. At this time, since the wedge portion 24b exhibits a so-called wedge effect, the outer ring 4 and the housing 8 can be prevented from further sliding (creeping).

以上、本実施の形態によれば、窪み部Ｇにくさび機構２４を挿入するだけで、くさび部２４ｂを窪み部Ｇとハウジング８とに押し付けた状態に維持することができる。このため、従来に比べて短時間で簡単にクリープ防止機構を組み立てることができる。この場合、ハウジング８に対するくさび部２４ｂの押し付け力は、弾性部２４ａの弾性力によって最適な状態に自動調整されるため、従来に比べてクリープの発生を確実に防止することができる。   As described above, according to the present embodiment, the wedge portion 24 b can be maintained in a state of being pressed against the recess portion G and the housing 8 only by inserting the wedge mechanism 24 into the recess portion G. For this reason, a creep prevention mechanism can be easily assembled in a short time compared with the past. In this case, since the pressing force of the wedge portion 24b against the housing 8 is automatically adjusted to an optimum state by the elastic force of the elastic portion 24a, the occurrence of creep can be reliably prevented as compared with the conventional case.

また、くさび機構２４において、弾性部２４ａの中央部分をくさび部２４ｂの屈曲方向に湾曲させたことで、双方のくさび部２４ｂの中心を結んだ線からオフセットした位置に弾性部２４ａの中央部分が設定される。この場合、当該弾性部２４ａをスムーズに弾性変形させることが可能となり、その結果、くさび機構２４全体をスムーズに湾曲させて縮めることができる。これにより、当該くさび機構２４を短時間で簡単に窪み部Ｇに挿入することができる。なお、その他の効果は、上述した第１の実施の形態と同様であるため、その説明は省略する。   Further, in the wedge mechanism 24, the central portion of the elastic portion 24a is bent in the bending direction of the wedge portion 24b so that the central portion of the elastic portion 24a is offset from the line connecting the centers of the both wedge portions 24b. Is set. In this case, the elastic portion 24a can be elastically deformed smoothly. As a result, the entire wedge mechanism 24 can be smoothly curved and contracted. Thereby, the said wedge mechanism 24 can be easily inserted in the hollow part G in a short time. Since other effects are the same as those of the first embodiment described above, description thereof is omitted.

なお、上述した実施の形態において、窪み部Ｇは、外輪４の周面４ｓを一部ストレートに切り欠いた構成としたが、これに代えて例えば図４(ｃ)に示すように、窪み部Ｇを、その中央部分から両側に向うに従ってハウジング８との隙間を直線状に小さくさせる略Ｖ字状の構成としても良い。   In the above-described embodiment, the recess portion G has a configuration in which the peripheral surface 4s of the outer ring 4 is partially cut straight, but instead, for example, as shown in FIG. G may have a substantially V-shaped configuration in which a gap with the housing 8 is linearly reduced from the central portion toward both sides.

なお、上述した第１〜第３の実施の形態及び第１〜第３の変形例では、外輪４の周面４ｓに１つのクリープ防止機構を設けた場合を例示したが、これに限定されることは無く、外輪４の周面４ｓに沿って所定間隔で複数のクリープ防止機構を設けても良い。   In the first to third embodiments and the first to third modifications described above, the case where one creep prevention mechanism is provided on the peripheral surface 4s of the outer ring 4 is illustrated, but the present invention is not limited thereto. However, a plurality of creep prevention mechanisms may be provided at predetermined intervals along the peripheral surface 4s of the outer ring 4.

また、上述した第１〜第３の実施の形態及び第１〜第３の変形例では、ハウジング８と外輪４との相対すべりを防止するクリープ防止機構を想定して説明したが、これに限定されることは無く、回転軸(図示しない)と内輪２との相対すべりを防止するように、第１〜第３の実施の形態及び第１〜第３の変形例と同様のクリープ防止機構を内輪２に適用しても良いし、或いは、当該内輪２が嵌合する回転軸の外周に同様のクリープ防止機構を適用しても良い。ここで、回転軸の外周にクリープ防止機構を適用する方法としては、当該回転軸の外周に窪み部Ｇを形成しても良いし、或いは、窪み部Ｇの代わりに例えば回転軸の外周の一部をストレートに切り欠いたり、切除したりするようにして、そこに上述したようなくさび機構を介在させれば良い。この場合、内輪２の内周(回転軸との嵌め合い面)に同様の加工を施すことは手間がかかり面倒であるが、当該内輪２の内周を加工する必要がないというのは大きなメリットになる。   In the first to third embodiments and the first to third modifications described above, the creep prevention mechanism that prevents relative sliding between the housing 8 and the outer ring 4 has been described. However, the present invention is not limited to this. In order to prevent relative sliding between the rotating shaft (not shown) and the inner ring 2, a creep prevention mechanism similar to that in the first to third embodiments and the first to third modifications is provided. You may apply to the inner ring | wheel 2, or you may apply the same creep prevention mechanism to the outer periphery of the rotating shaft with which the said inner ring | wheel 2 fits. Here, as a method of applying the creep prevention mechanism to the outer periphery of the rotating shaft, the recess portion G may be formed on the outer periphery of the rotating shaft, or instead of the recess portion G, for example, The part may be cut straight or cut out, and the wedge mechanism may be interposed there as described above. In this case, it is troublesome and troublesome to apply the same processing to the inner periphery (the mating surface with the rotating shaft) of the inner ring 2, but it is a great advantage that the inner periphery of the inner ring 2 does not need to be processed. become.

上述した第１〜第３の実施の形態及び第１〜第３の変形例では、内輪２と外輪４の一方にクリープ防止機構を適用した場合を想定したが、これに限定されることは無く、内外輪2,4の双方に適用しても良い。   In the first to third embodiments and the first to third modifications described above, it is assumed that the creep prevention mechanism is applied to one of the inner ring 2 and the outer ring 4, but the present invention is not limited to this. The present invention may be applied to both the inner and outer rings 2 and 4.

(ａ)は、本発明の第１の実施の形態に係る軸受用クリープ防止機構の構成を拡大して示す断面図、(ｂ)は、外輪側から見た同図(ａ)の軸受用クリープ防止機構の構成を拡大して示す平面図、(ｃ)は、第１の実施の形態に係る軸受用クリープ防止機構の他の構成を拡大して示す断面図。(a) is sectional drawing which expands and shows the structure of the creep prevention mechanism for bearings concerning the 1st Embodiment of this invention, (b) is the creep for bearings of the same figure (a) seen from the outer ring | wheel side The top view which expands and shows the structure of a prevention mechanism, (c) is sectional drawing which expands and shows the other structure of the creep prevention mechanism for bearings which concerns on 1st Embodiment. (ａ)は、本発明の第２の実施の形態に係る軸受用クリープ防止機構の構成を拡大して示す断面図、(ｂ)は、外輪側から見た同図(ａ)の軸受用クリープ防止機構の構成を拡大して示す平面図、(ｃ)は、第２の実施の形態に係る軸受用クリープ防止機構の他の構成を拡大して示す断面図、(ｄ)は、第２の実施の形態に係る軸受用クリープ防止機構の他の構成を拡大して示す断面図。(a) is sectional drawing which expands and shows the structure of the creep prevention mechanism for bearings concerning the 2nd Embodiment of this invention, (b) is the creep for bearing of the figure (a) seen from the outer ring side The top view which expands and shows the structure of a prevention mechanism, (c) is sectional drawing which expands and shows the other structure of the creep prevention mechanism for bearings concerning 2nd Embodiment, (d) is the 2nd Sectional drawing which expands and shows the other structure of the creep prevention mechanism for bearings which concerns on embodiment. (ａ)は、本発明の第１の変形例に係る軸受用クリープ防止機構の構成を分解して示す斜視図、(ｂ)は、本発明の第２の変形例に係る軸受用クリープ防止機構の構成を分解して示す斜視図、(ｃ)は、本発明の第３の変形例に係る軸受用クリープ防止機構の構成を分解して示す斜視図。(a) is an exploded perspective view showing the structure of the bearing creep prevention mechanism according to the first modification of the present invention, and (b) is a bearing creep prevention mechanism according to the second modification of the present invention. The perspective view which decomposes | disassembles and shows the structure of (c), (c) is a perspective view which decomposes | disassembles and shows the structure of the creep prevention mechanism for bearings concerning the 3rd modification of this invention. (ａ)は、本発明の第３の実施の形態に係る軸受用クリープ防止機構の構成を拡大して示す断面図、(ｂ)は、第３の実施の形態に係る軸受用クリープ防止機構の斜視図、(ｃ)は、第３の実施の形態に係る軸受用クリープ防止機構の他の構成を拡大して示す断面図。(a) is sectional drawing which expands and shows the structure of the creep prevention mechanism for bearings concerning the 3rd Embodiment of this invention, (b) is the creep prevention mechanism for bearings concerning 3rd Embodiment. A perspective view and (c) are expanded sectional views showing other composition of a bearing creep prevention mechanism concerning a 3rd embodiment.

符号の説明Explanation of symbols

２ 内輪
４ 外輪
４ｓ 周面
８ ハウジング(取付部位)
１０ バネ部材(弾性部)
１２ 転がり部材(くさび部)
Ｇ 窪み部 2 Inner ring 4 Outer ring 4s Circumferential surface 8 Housing (mounting part)
10 Spring member (elastic part)
12 Rolling member (wedge)
G hollow

Claims (4)

相対回転可能に対向配置された軌道輪を有する軸受に設けられ、軌道輪と当該軌道輪が取り付けられる取付部位との相対すべりを防止するための軸受用クリープ防止機構であって、
少なくとも一方の軌道輪の取付部位に取り付ける側の周面を一部窪ませて形成した窪み部と、当該窪み部と取付部位との間に介挿させるくさび機構とを備えており、
くさび機構は、弾性変形可能な弾性部と、当該弾性部によって取付部位に押し付けられた状態に維持されるくさび部とを備えて構成されていることを特徴とする軸受用クリープ防止機構。 A bearing creep prevention mechanism for preventing relative sliding between a bearing ring and a mounting portion to which the bearing ring is attached, provided on a bearing having a bearing ring disposed so as to be relatively rotatable.
A hollow portion formed by partially hollowing the peripheral surface to be attached to the attachment portion of at least one bearing ring, and a wedge mechanism inserted between the hollow portion and the attachment portion,
The wedge mechanism is configured to include an elastic portion that can be elastically deformed and a wedge portion that is maintained in a state of being pressed against the attachment site by the elastic portion. くさび機構において、くさび部は、軌道輪と取付部位との相対すべりに伴って回転可能な転がり部材で構成されていることを特徴とする請求項１に記載の軸受用クリープ防止機構。   2. The bearing creep prevention mechanism according to claim 1, wherein the wedge portion is formed of a rolling member that can rotate in association with relative sliding between the race ring and the attachment portion. 3. くさび機構において、転がり部材は、窪み部と取付部位との間に介挿可能な保持器によって保持されていることを特徴とする請求項２に記載の軸受用クリープ防止機構。   3. The bearing creep prevention mechanism according to claim 2, wherein the rolling member is held by a cage that can be inserted between the recess and the attachment portion. くさび機構において、弾性部とくさび部とは、互いに一体的に形成されていることを特徴とする請求項１に記載の軸受用クリープ防止機構。   The bearing creep prevention mechanism according to claim 1, wherein the elastic portion and the wedge portion are formed integrally with each other in the wedge mechanism.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2552964A (en) * 2016-08-15 2018-02-21 Edwards Ltd Rotating machine and method of manufacture
CN114046315A (en) * 2021-11-26 2022-02-15 中国航发哈尔滨轴承有限公司 Bearing of flexible raceway
DE102021105661A1 (en) 2021-03-09 2022-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bearing arrangement for a rotor shaft of an electric machine dimensioned for the electric drive of a motor vehicle

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JPS58155429U (en) * 1982-04-14 1983-10-17 株式会社日立製作所 Creep prevention device for rolling bearings
JPS6340659Y2 (en) * 1981-09-25 1988-10-24
JP2004116659A (en) * 2002-09-26 2004-04-15 Koyo Seiko Co Ltd Rolling bearing

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Publication number Priority date Publication date Assignee Title
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JPS5144825Y2 (en) * 1973-04-09 1976-10-30
JPS6340659Y2 (en) * 1981-09-25 1988-10-24
JPS58155429U (en) * 1982-04-14 1983-10-17 株式会社日立製作所 Creep prevention device for rolling bearings
JP2004116659A (en) * 2002-09-26 2004-04-15 Koyo Seiko Co Ltd Rolling bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2552964A (en) * 2016-08-15 2018-02-21 Edwards Ltd Rotating machine and method of manufacture
DE102021105661A1 (en) 2021-03-09 2022-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bearing arrangement for a rotor shaft of an electric machine dimensioned for the electric drive of a motor vehicle
CN114046315A (en) * 2021-11-26 2022-02-15 中国航发哈尔滨轴承有限公司 Bearing of flexible raceway
CN114046315B (en) * 2021-11-26 2024-01-23 中国航发哈尔滨轴承有限公司 Bearing with deformable roller path

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