JP2005337350A - Rotation transmission device with built-in one-way clutch - Google Patents

Rotation transmission device with built-in one-way clutch Download PDF

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JP2005337350A
JP2005337350A JP2004155814A JP2004155814A JP2005337350A JP 2005337350 A JP2005337350 A JP 2005337350A JP 2004155814 A JP2004155814 A JP 2004155814A JP 2004155814 A JP2004155814 A JP 2004155814A JP 2005337350 A JP2005337350 A JP 2005337350A
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Prior art keywords
way clutch
rotation transmission
transmission device
built
grease
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JP2004155814A
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Japanese (ja)
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Yujiro Toda
雄次郎 戸田
Shinya Nakatani
真也 中谷
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • F16D41/067—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/63—Gears with belts and pulleys
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/06—Lubrication details not provided for in group F16D13/74

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Lubricants (AREA)
  • Pulleys (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly efficient rotation transmission device with a built-in one-way clutch capable of exhibiting enhanced rotation transmission performance at low and high temperatures, and capable of exhibiting enhanced durability with respect to high speed rotation, high load and vibration. <P>SOLUTION: This rotation transmission device with the built-in one-way clutch is provided with a support bearing and the one-way clutch lubricated by grease comprising synthetic hydrocarbon oil as a base oil, a urea compound as a thickener, and zinc dialkyldithiophosphate and a phosphorus-sulfur additive other than zinc dialkyldithiophosphate to be added. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えばオルタネータ等の自動車用補機の回転軸や、アイドリングストップ車に搭載するエンジンのクランクシャフト及び補機駆動装置の回転軸等に装着するプーリ装置等に使用される一方向クラッチ内蔵型回転伝達装置に関する。   The present invention has a built-in one-way clutch used in, for example, a rotating shaft of an auxiliary machine for an automobile such as an alternator, a crankshaft of an engine mounted on an idling stop car, a pulley device mounted on a rotating shaft of an auxiliary machine driving device, The present invention relates to a mold rotation transmission device.

オルタネータ等の補機を駆動する為のプーリ装置として従来から、一方向クラッチ内蔵 型回転伝達装置の１種である、一方向クラッチ内蔵型プーリ装置を使用する事が一部で行なわれている。図１は、この一方向クラッチ内蔵型プーリ装置の１例を示している。この一方向クラッチ内蔵型プーリ装置は、互いに同心に配置した１対の回転部材である、スリーブ１とプーリ２とを備える。そして、これらスリーブ１の外周面とプーリ２の内周面との間に、一方向クラッチであるローラクラッチ３と１対のサポート軸受４、４とを設けている。   Conventionally, as a pulley device for driving an auxiliary machine such as an alternator, a one-way clutch built-in type pulley device, which is a kind of one-way clutch built-in type rotation transmission device, has been partially used. FIG. 1 shows an example of the pulley device with a built-in one-way clutch. This one-way clutch built-in pulley apparatus includes a sleeve 1 and a pulley 2 which are a pair of rotating members arranged concentrically with each other. A roller clutch 3 that is a one-way clutch and a pair of support bearings 4 and 4 are provided between the outer peripheral surface of the sleeve 1 and the inner peripheral surface of the pulley 2.

上記スリーブ１は、全体を円筒状に形成しており、オルタネータ等の補機の回転軸に外嵌固定して、この回転軸と共に回転自在である。一方、上記プーリ２は、やはり全体を円筒状に形成しており、その外周面の幅方向に関する断面形状を波形として、ポリＶベルトと呼ばれる無端ベルトの一部を掛け渡し自在としている。そして、上記スリーブ１の外周面と上記プーリ２の内周面との間に存在する円筒状空間の軸方向中間部に上記ローラクラッチ３を、同じくこの空間の軸方向両端部でこのローラクラッチ３を軸方向両側から挟む位置に上記サポート軸受４、４を、それぞれ配置している。   The sleeve 1 is formed in a cylindrical shape as a whole, and is fitted on and fixed to a rotating shaft of an auxiliary machine such as an alternator, and is rotatable together with the rotating shaft. On the other hand, the pulley 2 is also formed in a cylindrical shape as a whole, and a part of an endless belt called a poly-V belt can be freely passed over with the cross-sectional shape in the width direction of the outer peripheral surface thereof corrugated. Then, the roller clutch 3 is disposed at the axially intermediate portion of the cylindrical space existing between the outer peripheral surface of the sleeve 1 and the inner peripheral surface of the pulley 2, and the roller clutch 3 is also disposed at both axial end portions of the space. The support bearings 4 and 4 are respectively arranged at positions sandwiching from both sides in the axial direction.

このうちのローラクラッチ３は、上記プーリ２が上記スリーブ１に対して所定方向に相対回転する傾向となる場合にのみ、これらプーリ２とスリーブ１との間での回転力の伝達を自在とする。この様なローラクラッチ３は、クラッチ用内輪５と、クラッチ用外輪６と、複数個のローラ７、７と、クラッチ用保持器８と、図示しないばねとから成る。このうちのクラッチ用内輪５は上記スリーブ１の中間部外周面に、上記クラッチ用外輪６は上記プーリ２の中間部内周面に、それぞれ締り嵌めで嵌合固定している。又、上記クラッチ用外輪６の中間部内周面を単なる円筒面とすると共に、上記クラッチ用内輪５の外周面をカム面９としている。即ち、このクラッチ用内輪５の外周面に、それぞれがランプ部と呼ばれる複数の凹部１０、１０を、円周方向に関し等間隔に形成して、このクラッチ用内輪５の外周面を上記カム面９としている。   Of these, the roller clutch 3 can freely transmit the rotational force between the pulley 2 and the sleeve 1 only when the pulley 2 tends to rotate relative to the sleeve 1 in a predetermined direction. . Such a roller clutch 3 includes a clutch inner ring 5, a clutch outer ring 6, a plurality of rollers 7, 7, a clutch retainer 8, and a spring (not shown). The clutch inner ring 5 is fitted and fixed to the outer peripheral surface of the intermediate portion of the sleeve 1, and the clutch outer ring 6 is fixed to the inner peripheral surface of the intermediate portion of the pulley 2 by an interference fit. The inner peripheral surface of the intermediate portion of the outer ring for clutch 6 is a simple cylindrical surface, and the outer peripheral surface of the inner ring for clutch 5 is a cam surface 9. That is, a plurality of concave portions 10 and 10 each called a ramp portion are formed on the outer peripheral surface of the clutch inner ring 5 at equal intervals in the circumferential direction, and the outer peripheral surface of the clutch inner ring 5 is formed on the cam surface 9. It is said.

そして、このカム面９と上記クラッチ用外輪６の中間部内周面との間に、上記複数個のローラ７、７と、これら各ローラ７、７を転動並びに円周方向に関する若干の変位自在に支持する、上記クラッチ用保持器８とを設けている。このクラッチ用保持器８は、全体を合成樹脂により造っており、その内周縁部を上記カム面９の一部と係合させる事で、上記クラッチ用内輪５に対する相対回転を阻止している。これと共に、図示の例では、上記クラッチ用保持器８の端部内周面に形成した凸部１１を、上記クラッチ用内輪５の軸方向端面と上記スリーブ１の外周面に設けた段差面１２との間で挟持する事により、上記クラッチ用保持器８の軸方向に関する位置決めを図っている。又、上記クラッチ用保持器８と上記各ローラ７、７との間には、これら各ローラ７、７を円周方向に関して同方向（上記各凹部１０、１０が浅くなる方向）に押圧する為の、図示しないばねを設けている。   Between the cam surface 9 and the inner peripheral surface of the intermediate portion of the clutch outer ring 6, the plurality of rollers 7, 7 and the rollers 7, 7 can roll and slightly displace in the circumferential direction. The clutch retainer 8 is provided for supporting the clutch. The clutch retainer 8 is entirely made of synthetic resin, and its inner peripheral edge is engaged with a part of the cam surface 9 to prevent relative rotation with respect to the clutch inner ring 5. At the same time, in the illustrated example, a convex portion 11 formed on the inner peripheral surface of the end of the clutch cage 8 is provided with a stepped surface 12 provided on the end surface in the axial direction of the inner ring 5 for clutch and the outer peripheral surface of the sleeve 1. The clutch retainer 8 is positioned with respect to the axial direction. In addition, between the clutch retainer 8 and the rollers 7 and 7, the rollers 7 and 7 are pressed in the same direction in the circumferential direction (direction in which the recesses 10 and 10 become shallower). A spring (not shown) is provided.

尚、上述の様なローラクラッチ３を構成する場合、上記複数個のローラ７、７と当接する円筒面及びカム面９は、それぞれ前記プーリ２の内周面及び上記スリーブ１の外周面に直接形成する場合もある。又、上記円筒面と上記カム面９との径方向に関する配置は、上述した構造と逆にする場合もある。何れにしても、この様なローラクラッチ３の構造及び作用に就いては、従来から周知である為、これ以上の詳しい説明は省略する。   In the case of constituting the roller clutch 3 as described above, the cylindrical surface and the cam surface 9 in contact with the plurality of rollers 7 and 7 are directly on the inner peripheral surface of the pulley 2 and the outer peripheral surface of the sleeve 1, respectively. Sometimes it forms. Further, the arrangement of the cylindrical surface and the cam surface 9 in the radial direction may be reversed from the above-described structure. In any case, since the structure and operation of such a roller clutch 3 are well known in the art, further detailed explanation is omitted.

上述の様に構成する一方向クラッチ内蔵型プーリ装置は、上記スリーブ１をオルタネータ等の補機の回転軸の端部に外嵌固定すると共に、上記プーリ２の外周面に無端ベルトを掛け渡す。この無端ベルトはエンジンのクランクシャフト等の端部に固定された駆動プーリに掛け渡され、この駆動プーリの回転により駆動する。この様な状態で組み付けられる一方向クラッチ内蔵型プーリ装置は、上記無端ベルトの走行速度が一定若しくは上昇傾向にある場合には、上記プーリ２から上記回転軸への回転力の伝達を自在とし、反対に上記無端ベルトの走行速度が低下傾向にある場合には、これらプーリ２と回転軸との相対回転を自在とする。この結果、上記クランクシャフトの回転角速度が変動した場合でも、上記無端ベルトと上記プーリ２とが擦れ合う事を防止して、鳴きと呼ばれる異音の発生や摩耗による無端ベルトの寿命低下を防止すると共に、オルタネータの発電効率が低下する事を防止できる。   In the pulley apparatus with a built-in one-way clutch configured as described above, the sleeve 1 is fitted and fixed to the end of the rotating shaft of an auxiliary machine such as an alternator, and an endless belt is stretched around the outer peripheral surface of the pulley 2. The endless belt is stretched around a driving pulley fixed to an end portion of an engine crankshaft or the like, and is driven by the rotation of the driving pulley. The one-way clutch built-in type pulley device assembled in such a state makes it possible to freely transmit the rotational force from the pulley 2 to the rotating shaft when the traveling speed of the endless belt is constant or tends to increase, On the other hand, when the traveling speed of the endless belt tends to decrease, the pulley 2 and the rotation shaft can freely rotate relative to each other. As a result, even when the rotational angular velocity of the crankshaft fluctuates, the endless belt and the pulley 2 are prevented from rubbing, and the life of the endless belt is prevented from being deteriorated due to the generation of abnormal noise called squealing and wear. It is possible to prevent the power generation efficiency of the alternator from decreasing.

又、上記一方向クラッチ内蔵型プーリ装置をエンジンのアイドルストップ時の補機駆動装置に利用する場合には、この一方向クラッチ内蔵型プーリ装置をクランクシャフトや電動モータの駆動軸の端部に装着する。これにより、これらエンジンと電動モータとのうちの一方の装置が運転状態にあり、他方の装置が停止状態にある場合に、この一方の装置の回転軸から上記プーリ２への回転力の伝達を自在にすると共に、上記他方の装置の回転軸が回転しない様にする。   In addition, when the pulley device with a built-in one-way clutch is used as an accessory drive device when the engine is idling, the pulley device with a built-in one-way clutch is mounted on the end of a crankshaft or electric motor drive shaft. To do. As a result, when one of the engine and the electric motor is in the operating state and the other device is in the stopped state, the rotational force is transmitted from the rotating shaft of the one device to the pulley 2. While making it free, the rotation shaft of the other device is prevented from rotating.

一方、サポート軸受４は、例えば、外輪軌道１３を有する外輪１４と、内輪軌道１５を有する内輪１６との間に、転動体である玉１７を保持器１９を介して回動自在に保持し、潤滑のためのグリース（図示せず）を充填してシール部材１８で封止して構成されている。封入グリースとして種々のものが知られており、例えばエーテル油を基油としたグリース（例えば、特許文献１参照）、圧力粘度係数が１２ＧＰａ-1以上（２５℃時）のエステル系あるいは合成油系の基油にウレア系の増ちょう剤を配合したグリース（例えば、特許文献２参照）、ウレア化合物製の増ちょう剤と、４０℃における動粘度が６０ｃｓｔ以下の基油とからなるグリース（例えば、特許文献３参照）、シリコーン油を基油とするグリース（例えば、特許文献４参照）等が知られている。また、軸受部にエーテル油を基油とした混和ちょう度２８０〜３００のグリースを封入し、クラッチ部にエステル系油を基油とした混和ちょう度２５０〜２８０のグリースを封入した一方向クラッチも知られている（例えば、特許文献５参照）。 On the other hand, the support bearing 4 holds a ball 17 that is a rolling element rotatably via a cage 19 between an outer ring 14 having an outer ring raceway 13 and an inner ring 16 having an inner ring raceway 15, for example. A grease for lubrication (not shown) is filled and sealed with a seal member 18. Various types of encapsulated greases are known. For example, greases based on ether oil (see, for example, Patent Document 1), ester-based or synthetic oil-based pressure viscosity coefficient of 12 GPa −1 or more (at 25 ° C.) A grease (for example, see Patent Document 2) containing a urea-based thickener in a base oil, and a grease comprising a thickener made of a urea compound and a base oil having a kinematic viscosity at 40 ° C. of 60 cst or less (for example, Patent Document 3), greases based on silicone oil (for example, see Patent Document 4), and the like are known. Also, there is a one-way clutch in which grease having a miscibility of 280 to 300 using ether oil as a base oil is enclosed in the bearing portion and grease having a miscibility of 250 to 280 using ester oil as a base oil is enclosed in the clutch portion. It is known (see, for example, Patent Document 5).

特開平１１−８２６８８号公報JP 11-82688 A 特開２０００−２３４６３８号公報JP 2000-234638 A 特開２０００−２５３６２０号公報JP 2000-253620 A 特許第３０３３３０６号公報Japanese Patent No. 3033306 特開２００２−１３０４３３号公報JP 2002-130433 A

近年、オルタネータの高性能化・高出力化が益々進んでおり、これに伴って、オルタネータの回転軸の端部に装着する一方向クラッチ内蔵型プーリ装置の使用条件が厳しく（低温での動作性が良く、回転速度が高く、負荷荷重、発生する熱及び振動等が大きく）なっており、今後とも使用条件が厳しくなることを想定すると、上記に挙げたようなグリースでは対応しきれないことが予測される。   In recent years, the performance and performance of alternators have been increasing, and along with this, the conditions for using a pulley device with a built-in one-way clutch attached to the end of the rotating shaft of the alternator have become strict (operability at low temperatures). Assuming that the operating conditions will continue to be severe in the future, it may not be possible to handle with the greases listed above. is expected.

そこで、本発明は、低温及び高温での回転伝達性能に優れ、高速回転や高負荷、振動に対する耐久性も高く、高性能の一方向クラッチ内蔵型回転伝達装置を提供することを目的とする。   Accordingly, an object of the present invention is to provide a high-performance one-way clutch built-in type rotation transmission device that is excellent in rotation transmission performance at low and high temperatures, has high durability against high-speed rotation, high load, and vibration.

上記目的を達成するために、本発明は以下の一方向クラッチ内蔵型回転伝達装置を提供する。
（１）互いに同心に配置した１対の回転部材と、これら両回転部材の互いに対向する周面同士の間の軸方向に関して一部に設けられ、これら両回転部材同士が所定方向に相対回転する傾向となる場合にのみ、これら両回転部材の互いに対向する周面同士の間で回転力の伝達を自在とする一方向クラッチと、これら両回転部材の互いに対向する周面同士の間で一方向クラッチに対し軸方向に外れた部分に設けられ、これら両回転部材同士の間に加わるラジアル荷重を支承しつつこれら両内輪部材同士の相対回転を自在とする、転がり軸受であるサポート軸受とを備え、かつ、
前記サポート軸受及び一方向クラッチが、合成炭化水素油を基油とし、ウレア化合物を増ちょう剤とし、ジアルキルジチオリン酸亜鉛と該ジアルキルジチオリン酸亜鉛以外のリン−硫黄系添加剤とを添加してなるグリースにより潤滑されていることを特徴とする一方向クラッチ内蔵型回転伝達装置。
（２）前記基油の４０℃における動粘度が２０〜１５０ｍｍ２／ｓであることを特徴とする上記（１）記載の一方向クラッチ内蔵型回転伝達装置。
（３）前記ウレア化合物が、脂肪族ウレア化合物または脂環族ウレア化合物であることを特徴とする上記（１）または（２）記載の一方向クラッチ内蔵型回転伝達装置。
（４）前記リン−硫黄系添加剤が、硫化オレフィン、トリクレジルフォスフェート、チオフォスフェート、チオフォスファイトまたはこれらの混合物であることを特徴とする上記（１）〜（３）の何れか１項に記載の一方向クラッチ内蔵型回転伝達装置。
（５）前記ジアルキルジチオリン酸亜鉛がグリース全量の０．１〜５質量％、前記リン−硫黄系添加剤がグリース全量の０．１〜５質量％含有することを特徴とする上記（１）〜（４）の何れか１項に記載の一方向クラッチ内蔵型回転伝達装置。 In order to achieve the above object, the present invention provides the following one-way clutch built-in type rotation transmission device.
(1) A pair of rotating members arranged concentrically with each other and a part of the rotating members in the axial direction between the mutually facing peripheral surfaces, and these rotating members relatively rotate in a predetermined direction. Only when it becomes a tendency, the one-way clutch which enables transmission of rotational force between the mutually opposing peripheral surfaces of these two rotating members, and one direction between the mutually opposing peripheral surfaces of these two rotating members A support bearing which is a rolling bearing that is provided in a portion that is axially disengaged with respect to the clutch and that allows a relative load between the inner ring members to be freely supported while supporting a radial load applied between the rotating members. ,And,
The support bearing and the one-way clutch comprise a synthetic hydrocarbon oil as a base oil, a urea compound as a thickener, and a zinc dialkyldithiophosphate and a phosphorus-sulfur additive other than the zinc dialkyldithiophosphate. One-way clutch built-in rotation transmission device characterized by being lubricated with grease.
(2) The one-way clutch built-in rotation transmission device according to (1), wherein the base oil has a kinematic viscosity at 40 ° C. of 20 to 150 mm 2 / s.
(3) The rotation transmission device with a built-in one-way clutch according to (1) or (2), wherein the urea compound is an aliphatic urea compound or an alicyclic urea compound.
(4) Any one of the above (1) to (3), wherein the phosphorus-sulfur-based additive is sulfurized olefin, tricresyl phosphate, thiophosphate, thiophosphite, or a mixture thereof. A rotation transmission device with a built-in one-way clutch according to item.
(5) The above (1) to (1), wherein the zinc dialkyldithiophosphate contains 0.1 to 5% by mass of the total amount of grease, and the phosphorus-sulfur additive contains 0.1 to 5% by mass of the total amount of grease. The one-way clutch built-in type rotation transmission device according to any one of (4).

本発明によれば、より厳しい使用条件にも十分に耐え得る、高性能の一方向クラッチ内蔵型回転伝達装置が提供される。   According to the present invention, there is provided a high-performance one-way clutch built-in rotation transmission device that can sufficiently withstand severer use conditions.

以下、本発明に関して詳細に説明する。   Hereinafter, the present invention will be described in detail.

本発明において、一方向クラッチ内蔵型回転伝達装置自体の構成には制限がなく、例えば図１に示した一方向クラッチ内蔵型プーリ装置を例示することができる。そして、本発明では、一方向クラッチであるローラクラッチ３及びサポート軸受４に後述されるグリースが封入される。   In the present invention, the configuration of the one-way clutch built-in type rotation transmission device itself is not limited. For example, the one-way clutch built-in pulley device shown in FIG. 1 can be exemplified. And in this invention, the grease mentioned later is enclosed with the roller clutch 3 and the support bearing 4 which are one-way clutches.

グリースを形成する基油は合成炭化水素油であり、ポリ−α−オレフィン油が好適である。また、耐熱性に優れたポリオールエステル油やアルキルジフェニルエーテル油も好適である。但し、ローラクラッチ３やサポート軸受４の低温での起動時における転がり接触部での異音の発生や、高温での非回転時における接触部位での油切れを防止する観点から、４０℃における動粘度が２０〜１５０ｍｍ２／ｓのものが好ましい。 The base oil that forms the grease is a synthetic hydrocarbon oil, preferably a poly-α-olefin oil. Also suitable are polyol ester oils and alkyl diphenyl ether oils having excellent heat resistance. However, from the viewpoint of preventing the generation of noise at the rolling contact portion when the roller clutch 3 and the support bearing 4 are started at a low temperature and the oil breakage at the contact portion when not rotating at a high temperature, A thing with a viscosity of 20-150 mm < 2 > / s is preferable.

増ちょう剤には、耐熱性にすぐれたウレア化合物を用いる。ウレア化合物には制限がなく、ジウレア、トリウレア、テトラウレア、あるいはそれ以上のポリウレアを使用できるが、特に下記（Ｉ）式で表されるジウレア化合物が好ましい。（Ｉ）式において、Ｒ１，Ｒ３は脂肪族基または脂環族基（例えば、シクロヘキシル基）であり、同一でも異なっていてもよい。また、Ｒ２は２価の芳香族系炭化水素基である。尚、Ｒ１、Ｒ３が芳香族基であるジウレア化合物は、加熱により硬化する傾向にあり、高温のスベリ部における潤滑には適さない。
Ｒ１−ＮＨＣＯＮＨ−Ｒ２−ＮＨＣＯＮＨ−Ｒ３ ・・・（Ｉ） As the thickener, a urea compound having excellent heat resistance is used. The urea compound is not limited, and diurea, triurea, tetraurea, or higher polyurea can be used, and diurea compounds represented by the following formula (I) are particularly preferable. In the formula (I), R1 and R3 are an aliphatic group or an alicyclic group (for example, a cyclohexyl group), and may be the same or different. R2 is a divalent aromatic hydrocarbon group. A diurea compound in which R1 and R3 are aromatic groups tends to be cured by heating, and is not suitable for lubrication in a high-temperature sliding portion.
R1-NHCONH-R2-NHCONH-R3 (I)

増ちょう剤の配合量は、上記基油とグリースを形成し得る量であれば制限されないが、グリース全量の１０〜２０質量％が適当である。   The blending amount of the thickener is not limited as long as it can form grease with the base oil, but 10 to 20% by mass of the total amount of grease is appropriate.

上記グリースの混和ちょう度は、２５０〜３００が好ましい。混和ちょう度が２５０未満では、硬すぎて必要な潤滑部位に十分にグリースが行き渡らない。一方、混和ちょう度が３００を超えると、柔らかすぎて走行時の振動等でグリースが流出しやすくなる等の問題が生じる。   The blending degree of the grease is preferably 250 to 300. When the penetration is less than 250, the grease is too hard to sufficiently spread the grease to the necessary lubrication site. On the other hand, when the blending degree exceeds 300, there arises a problem that grease is likely to flow out due to vibration during running and the like.

また、上記グリースには、ジアルキルジチオリン酸亜鉛と、ジアルキルジチオリン酸亜鉛以外のリン−硫黄系添加剤とが添加される。リン−硫黄系添加剤としては、硫化オレフィン、トリクレジルフォスフェート、チオフォスフェート、チオフォスファイトが好ましい。これらの添加剤は、摩耗防止剤として機能するものであり、上記の組み合わせによりそれぞれを単独で使用した場合に比べてより強化な保護膜を形成し、より高い耐摩耗効果を発現する。   Further, zinc dialkyldithiophosphate and a phosphorus-sulfur-based additive other than zinc dialkyldithiophosphate are added to the grease. As the phosphorus-sulfur additive, sulfurized olefin, tricresyl phosphate, thiophosphate and thiophosphite are preferable. These additives function as an antiwear agent, and form a stronger protective film than the case where each of them is used alone by the above combination, and exhibit a higher wear resistance effect.

所期の耐摩耗性を得るには、ジアルキルジチオリン酸亜鉛及びリン−硫黄系添加剤ともに、グリース全量の０．１〜５質量％添加する。何れか一方でもその添加量が０．１質量％未満では十分な摩耗防止作用が発現せず、５質量％を超えると効果が飽和するとともに熱安定性が低下するようになり、実用的でない。   To obtain the desired wear resistance, both zinc dialkyldithiophosphate and phosphorus-sulfur additives are added in an amount of 0.1 to 5% by mass based on the total amount of grease. In either case, if the added amount is less than 0.1% by mass, sufficient anti-wearing action is not exhibited, and if it exceeds 5% by mass, the effect is saturated and the thermal stability is lowered, which is not practical.

上記グリースには、その性能を一層高めるため、必要に応じて、従来からグリースに用いられている公知の一般的な添加剤を含有させることができ、例えば酸化防止剤や防錆剤等を適量配合することができる。   In order to further improve the performance of the grease, known general additives conventionally used in grease can be included as necessary. For example, an appropriate amount of an antioxidant, a rust inhibitor, or the like can be contained. Can be blended.

以下に実施例及び比較例を挙げて本発明を更に説明するが、本発明はこれにより何ら制限されるものではない。   Hereinafter, the present invention will be further described with reference to examples and comparative examples, but the present invention is not limited thereto.

（実施例１〜６、比較例１〜６）
表１及び表２に示す配合にて試験グリースを調製した。そして、各試験グリースを用いて下記に示す（１）低温特性試験、（２）耐摩耗性試験及び（３）熱安定性試験を行った。結果を表１及び表２に併記する。 (Examples 1-6, Comparative Examples 1-6)
Test greases were prepared with the formulations shown in Tables 1 and 2. Each test grease was subjected to the following (1) low temperature characteristic test, (2) wear resistance test, and (3) thermal stability test. The results are shown in Tables 1 and 2.

（１）低温特性試験
図２は試験に用いたレオメータを示す模式図であるが、上のプレートと下のステージとの間に試験グリースを挟み（ギャップ：１ｍｍ）、上のプレートを５０Ｐａの一定応力で揺動させながら、試験温度を−４０℃から−３０℃まで昇温し、その間の−３０℃での貯蔵弾性率Ｇ´を測定した。Ｇ´が小さいほど低音での流動性が高いことを示し、本発明では１．０×１０５以下を合格とした。 (1) Low temperature characteristic test FIG. 2 is a schematic diagram showing a rheometer used in the test. Test grease is sandwiched between the upper plate and the lower stage (gap: 1 mm), and the upper plate is kept at a constant 50 Pa. While rocking with stress, the test temperature was raised from -40 ° C to -30 ° C, and the storage elastic modulus G 'at -30 ° C during that time was measured. G'indicates a high fluidity at bass Smaller, in the present invention were evaluated as acceptable 1.0 × 10 5 or less.

（２）耐摩耗性試験
四級試験（ＡＳＴＭ Ｄ２２６６に準拠）を行った。試験条件は回転数１２００ｒｐｍ、荷重３９２Ｎ、温度７５℃とし、６０分後の摩耗痕径を測定した。試験は３回行い、その平均値が０．５ｍｍ以下を合格とした。 (2) Abrasion resistance test A quaternary test (based on ASTM D2266) was conducted. The test conditions were a rotation speed of 1200 rpm, a load of 392 N, and a temperature of 75 ° C., and the wear scar diameter after 60 minutes was measured. The test was performed three times, and the average value was determined to be 0.5 mm or less.

（３）熱安定性試験
スレンレスシャーレ（ＳＵＳ３０４）に試験グリースを厚さ３ｍｍとなるように均一に塗布し、恒温槽にて１５０℃で５００時間保持した後、全酸価を測定した。全酸価増加量が５ｍｇＫＯＨ／ｇ以下を合格とした。 (3) Thermal stability test A test grease was uniformly applied to a stainless steel dish (SUS304) to a thickness of 3 mm, held at 150 ° C. for 500 hours in a thermostatic bath, and then the total acid value was measured. The total acid value increase was 5 mgKOH / g or less.

Figure 2005337350
Figure 2005337350

Figure 2005337350
Figure 2005337350

表１及び表２に示すように、本発明に従う各実施例の試験グリースは、低温特性、耐摩耗性及び熱安定性の何れも優れており、一方向クラッチ内蔵型回転伝達装置に好適であることがわかる。   As shown in Tables 1 and 2, the test grease of each example according to the present invention is excellent in low temperature characteristics, wear resistance and thermal stability, and is suitable for a one-way clutch built-in rotation transmission device. I understand that.

これに対し、ジアルキルジチオリン酸亜鉛とリン−硫黄系添加剤とを併用しない各比較例の試験グリースは、何れも耐摩耗性に劣っている。更に、増ちょう剤にウレア化合物ではなく金属石けんを使用した比較例１〜３の試験グリースは熱安定性に劣り、ウレア化合物でも芳香族ジウレア化合物を使用した比較例４〜６の試験グリースは低温特性に劣る傾向がある。   On the other hand, all the test greases of the comparative examples in which the zinc dialkyldithiophosphate and the phosphorus-sulfur additive are not used together are inferior in wear resistance. Furthermore, the test greases of Comparative Examples 1 to 3 using metal soap instead of the urea compound as the thickener are inferior in thermal stability, and the test greases of Comparative Examples 4 to 6 using the aromatic diurea compound even at the urea compound are low in temperature. There is a tendency to be inferior in characteristics.

本発明の一方向クラッチ内蔵型回転伝達装置の一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment of the one-way clutch built-in type rotation transmission apparatus of this invention. レオメータの構成を示す模式図である。It is a schematic diagram which shows the structure of a rheometer.

符号の説明Explanation of symbols

１ スリーブ
２ プーリ
３ ローラクラッチ
４ サポート軸受
５ クラッチ用内輪
６ クラッチ用外輪
７ ローラ
８ クラッチ用保持器
９ カム面
１０ 凹部
１１ 凸部
１２ 段差面
１３ 外輪軌道
１４ 外輪
１５ 内輪軌道
１６ 内輪
１７ 玉
１８ シール部材
１９ 保持器 DESCRIPTION OF SYMBOLS 1 Sleeve 2 Pulley 3 Roller clutch 4 Support bearing 5 Clutch inner ring 6 Clutch outer ring 7 Roller 8 Clutch retainer 9 Cam surface 10 Concave portion 11 Convex portion 12 Step surface 13 Outer ring raceway 14 Outer ring 15 Inner ring raceway 16 Inner ring 17 Ball 18 Seal Member 19 Cage

Claims (5)

互いに同心に配置した１対の回転部材と、これら両回転部材の互いに対向する周面同士の間の軸方向に関して一部に設けられ、これら両回転部材同士が所定方向に相対回転する傾向となる場合にのみ、これら両回転部材の互いに対向する周面同士の間で回転力の伝達を自在とする一方向クラッチと、これら両回転部材の互いに対向する周面同士の間で一方向クラッチに対し軸方向に外れた部分に設けられ、これら両回転部材同士の間に加わるラジアル荷重を支承しつつこれら両内輪部材同士の相対回転を自在とする、転がり軸受であるサポート軸受とを備え、かつ、
前記サポート軸受及び一方向クラッチが、合成炭化水素油を基油とし、ウレア化合物を増ちょう剤とし、ジアルキルジチオリン酸亜鉛と該ジアルキルジチオリン酸亜鉛以外のリン−硫黄系添加剤とを添加してなるグリースにより潤滑されていることを特徴とする一方向クラッチ内蔵型回転伝達装置。 A pair of rotating members arranged concentrically with each other and a part of the rotating members in the axial direction between the circumferential surfaces facing each other, and these rotating members tend to rotate relative to each other in a predetermined direction. Only in the case of a one-way clutch that allows transmission of rotational force between the circumferential surfaces of the two rotating members facing each other, and a one-way clutch between the circumferential surfaces of the two rotating members facing each other. A support bearing that is a rolling bearing that is provided in a portion separated in the axial direction and that allows the relative rotation between the inner ring members to be supported while supporting a radial load applied between the two rotating members; and
The support bearing and the one-way clutch comprise a synthetic hydrocarbon oil as a base oil, a urea compound as a thickener, and a zinc dialkyldithiophosphate and a phosphorus-sulfur additive other than the zinc dialkyldithiophosphate. One-way clutch built-in rotation transmission device characterized by being lubricated with grease. 前記基油の４０℃における動粘度が２０〜１５０ｍｍ２／ｓであることを特徴とする請求項１記載の一方向クラッチ内蔵型回転伝達装置。 The one-way clutch built-in rotation transmission device according to claim 1, wherein the base oil has a kinematic viscosity at 40 ° C. of 20 to 150 mm 2 / s. 前記ウレア化合物が、脂肪族ウレア化合物または脂環族ウレア化合物であることを特徴とする請求項１または２記載の一方向クラッチ内蔵型回転伝達装置。   The one-way clutch built-in rotation transmission device according to claim 1 or 2, wherein the urea compound is an aliphatic urea compound or an alicyclic urea compound. 前記リン−硫黄系添加剤が、硫化オレフィン、トリクレジルフォスフェート、チオフォスフェート、チオフォスファイトまたはこれらの混合物であることを特徴とする請求項１〜３の何れか１項に記載の一方向クラッチ内蔵型回転伝達装置。   The unidirectional according to any one of claims 1 to 3, wherein the phosphorus-sulfur-based additive is sulfurized olefin, tricresyl phosphate, thiophosphate, thiophosphite, or a mixture thereof. Clutch built-in type rotation transmission device. 前記ジアルキルジチオリン酸亜鉛がグリース全量の０．１〜５質量％、前記リン−硫黄系添加剤がグリース全量の０．１〜５質量％含有することを特徴とする請求項１〜４の何れか１項に記載の一方向クラッチ内蔵型回転伝達装置。   The zinc dialkyldithiophosphate contains 0.1 to 5% by mass of the total amount of grease, and the phosphorus-sulfur additive contains 0.1 to 5% by mass of the total amount of grease. The one-way clutch built-in type rotation transmission device according to item 1.
JP2004155814A 2004-05-26 2004-05-26 Rotation transmission device with built-in one-way clutch Pending JP2005337350A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006132349A1 (en) * 2005-06-10 2006-12-14 Ntn Corporation Rotation transmission device with built-in one-way clutch
JP2007320987A (en) * 2006-05-30 2007-12-13 Nsk Ltd Hub unit for automobile
WO2008117819A1 (en) * 2007-03-26 2008-10-02 Kyodo Yushi Co., Ltd. Grease composition and machine part
JP2010053984A (en) * 2008-08-28 2010-03-11 Ntn Corp Outer ring rotated clutch release bearing, and clutch release bearing device
JP2018203999A (en) * 2017-06-07 2018-12-27 コスモ石油ルブリカンツ株式会社 Grease composition for rolling bearing

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006132349A1 (en) * 2005-06-10 2006-12-14 Ntn Corporation Rotation transmission device with built-in one-way clutch
JP2006342939A (en) * 2005-06-10 2006-12-21 Ntn Corp Rotation transmission device with built-in one-way clutch
US10160929B2 (en) 2005-06-10 2018-12-25 Ntn Corporation Rotation transmitting apparatus with built-in one-way clutch
JP2007320987A (en) * 2006-05-30 2007-12-13 Nsk Ltd Hub unit for automobile
WO2008117819A1 (en) * 2007-03-26 2008-10-02 Kyodo Yushi Co., Ltd. Grease composition and machine part
JP2008239687A (en) * 2007-03-26 2008-10-09 Kyodo Yushi Co Ltd Grease composition and mechanical component
JP2010053984A (en) * 2008-08-28 2010-03-11 Ntn Corp Outer ring rotated clutch release bearing, and clutch release bearing device
JP2018203999A (en) * 2017-06-07 2018-12-27 コスモ石油ルブリカンツ株式会社 Grease composition for rolling bearing

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