JP2007002913A - Lubricant for rotation transmission device with built-in one-way clutch and rotation transmission device with built-in one-way clutch - Google Patents

Lubricant for rotation transmission device with built-in one-way clutch and rotation transmission device with built-in one-way clutch Download PDF

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JP2007002913A
JP2007002913A JP2005183490A JP2005183490A JP2007002913A JP 2007002913 A JP2007002913 A JP 2007002913A JP 2005183490 A JP2005183490 A JP 2005183490A JP 2005183490 A JP2005183490 A JP 2005183490A JP 2007002913 A JP2007002913 A JP 2007002913A
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way clutch
built
rotation transmission
transmission device
lubricant
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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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/041—Coatings or solid lubricants, e.g. antiseize layers or pastes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/56—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen
    • C10M105/70—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing nitrogen as ring hetero atom
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/2203—Heterocyclic nitrogen compounds used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/077—Ionic Liquids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • 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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Pulleys (AREA)
  • Rolling Contact Bearings (AREA)
  • Lubricants (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide lubricants for a rotation transmission device with a built-in one-way clutch capable of providing excellent durability to the rotation transmission device with the built-in one-way clutch. <P>SOLUTION: The lubricants J1, J2 disposed in the internal spaces of the one-way clutch 3 and rolling bearings 2 forming the rotation transmission device with the built-in one-way clutch contain an ionic liquid with a coefficient of dynamic friction of 0.08 to 0.14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、一方向クラッチ内蔵型回転伝達装置用潤滑剤と、この潤滑剤により潤滑された一方向クラッチ内蔵型回転伝達装置に関する。   The present invention relates to a lubricant for a rotation transmission device with a built-in one-way clutch and a rotation transmission device with a built-in one-way clutch lubricated with the lubricant.

一方向クラッチ内蔵型回転伝達装置は、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に備えられ、外周にベルトを掛け渡して前記回転軸とベルトとの間で所定方向の駆動力のみを伝達するプーリ等として使用されている。このような一方向クラッチ内蔵型回転伝達装置の一例として、図１に示すものが知られている。   The one-way clutch built-in type rotation transmission device is provided, for example, on the rotating shaft of an auxiliary machine for an automobile such as an alternator, the crankshaft of an engine mounted on an idling stop vehicle, and the rotating shaft of an auxiliary machine driving device. It is used as a pulley or the like that is stretched and transmits only a driving force in a predetermined direction between the rotating shaft and the belt. As an example of such a one-way clutch built-in type rotation transmission device, one shown in FIG. 1 is known.

この一方向クラッチ内蔵型回転伝達装置は、図１に示すように、プーリ（回転部材）１２と、このプーリ１２の内径側にプーリ１２と同心に配置されたスリーブ（回転部材）１１と、このスリーブ１１の外周面１１ａとプーリ１２の内周面１２ａとの間に設けられる転がり軸受２，２及び一方向クラッチ３と、を備えている。
プーリ１２の外周面には、軸方向に沿う断面が波形となるように凹凸が形成されており、図示しない無端ベルト（Ｖベルト）が掛け渡される。無端ベルトは、図示しない補機駆動装置の駆動によって走行するものであり、この無端ベルトの走行に従ってプーリ１２が回転する。 As shown in FIG. 1, the one-way clutch built-in type rotation transmission device includes a pulley (rotating member) 12, a sleeve (rotating member) 11 disposed concentrically with the pulley 12 on the inner diameter side of the pulley 12, Rolling bearings 2 and 2 and a one-way clutch 3 provided between the outer peripheral surface 11a of the sleeve 11 and the inner peripheral surface 12a of the pulley 12 are provided.
Unevenness is formed on the outer peripheral surface of the pulley 12 so that a cross section along the axial direction has a waveform, and an endless belt (V belt) (not shown) is stretched over the pulley 12. The endless belt travels by driving an accessory driving device (not shown), and the pulley 12 rotates as the endless belt travels.

スリーブ１１は、本実施形態ではオルタネータの回転軸Ｓに外嵌固定された筒状部材であり、この回転軸Ｓに回転力を伝達する。スリーブ１１の軸方向中間部には、外径寸法の大きな大径部１１Ａが形成され、この大径部１１Ａの軸方向一端部には、さらに外径寸法の大きな突部１１Ｂが形成されている。なお、回転軸Ｓには発電用ローターが固定されており、オルタネータは回転軸Ｓの回転によって発電する。   In the present embodiment, the sleeve 11 is a cylindrical member that is externally fixed to the rotating shaft S of the alternator, and transmits the rotational force to the rotating shaft S. A large-diameter portion 11A having a large outer diameter is formed at the intermediate portion in the axial direction of the sleeve 11, and a protrusion 11B having a larger outer diameter is formed at one axial end of the large-diameter portion 11A. . Note that a power generating rotor is fixed to the rotating shaft S, and the alternator generates power by the rotation of the rotating shaft S.

一対の転がり軸受２，２は、スリーブ１１の軸方向両端にそれぞれ嵌合している。各転がり軸受２は、内輪２１、外輪２２、玉（転動体）２３、保持器２４、及び、一対のシール２５，２５を備える深溝玉軸受であり、内輪２１と外輪２２との間の一対のシール２５，２５によって閉塞された内部空間には、潤滑剤Ｊ１が配されている。   The pair of rolling bearings 2 and 2 are fitted to both ends of the sleeve 11 in the axial direction. Each rolling bearing 2 is a deep groove ball bearing including an inner ring 21, an outer ring 22, a ball (rolling element) 23, a cage 24, and a pair of seals 25, 25, and a pair of bearings between the inner ring 21 and the outer ring 22. Lubricant J1 is arranged in the internal space closed by the seals 25, 25.

一方向クラッチ３は、スリーブ１１の軸方向中間部、すなわち軸方向両端側に嵌合した一対の前記転がり軸受２，２の間に隣接して設けられている。この一方向クラッチは、クラッチ用内輪３１と、クラッチ用外輪３２と、クラッチ用内輪３１の外周面及びクラッチ用外輪３２の内周面３２ｂの間に配された複数のローラ３３と、ローラ３３を保持するクラッチ用保持器３４と、を備えている。そして、クラッチ用内輪３１の外周面及びクラッチ用外輪３２の内周面３２ｂの間には、潤滑剤Ｊ２が配されている。   The one-way clutch 3 is provided adjacently between the pair of the rolling bearings 2 and 2 fitted to the axially intermediate portion of the sleeve 11, that is, both axial ends. This one-way clutch includes a clutch inner ring 31, a clutch outer ring 32, a plurality of rollers 33 disposed between the outer peripheral surface of the clutch inner ring 31 and the inner peripheral surface 32b of the clutch outer ring 32, and the roller 33. A clutch retainer 34 for retaining the clutch. A lubricant J2 is disposed between the outer peripheral surface of the clutch inner ring 31 and the inner peripheral surface 32b of the clutch outer ring 32.

クラッチ用内輪３１は、スリーブ１１の大径部１１Ａに外嵌されており、その外周面は、通常の円筒面にローラ３３と同数の凹部３１ａを円周方向に等間隔に形成したカム面となっている。
クラッチ用外輪３２は、このクラッチ用内輪３１に対向するプーリ１２の内周面に嵌合しており、その内周面は通常の円筒面とされ、その両端部には内向フランジ状の一対の鍔３２ａが形成されている。
複数のローラ３３は、それぞれクラッチ用内輪３１の凹部３１ａとクラッチ用外輪３２の内周面３２ｂとの間に円周方向に移動可能に配され、クラッチ用内輪３１の凹部３１ａの外周面及びクラッチ用外輪３２の内周面３２ｂは、ローラ３３の摺動面となっている。 The clutch inner ring 31 is externally fitted to the large-diameter portion 11A of the sleeve 11. The outer peripheral surface of the clutch inner ring 31 is a cam surface in which the same number of concave portions 31a as the rollers 33 are formed at regular intervals in the circumferential direction. It has become.
The outer ring 32 for clutch is fitted to the inner peripheral surface of the pulley 12 facing the inner ring 31 for clutch, and the inner peripheral surface thereof is a normal cylindrical surface, and a pair of inward flanges is formed at both ends thereof. A collar 32a is formed.
The plurality of rollers 33 are arranged so as to be movable in the circumferential direction between the concave portion 31a of the clutch inner ring 31 and the inner peripheral surface 32b of the outer ring 32 for clutch, and the outer surface of the concave portion 31a of the inner ring 31 for clutch and the clutch An inner peripheral surface 32 b of the outer ring 32 is a sliding surface of the roller 33.

クラッチ用内輪３１の凹部３１ａは、対向するクラッチ用外輪３２の内周面３２ｂとの間隙が円周方向に向かうにつれて徐々に広く（若しくは狭く）なるように形成されている。この間隙は、最も狭い部分ではローラ３３の直径よりも小さく、最も広い部分ではローラ３３の直径よりも大きい。このため、ローラ３３は、最も狭い間隙では挟み込まれ、最も狭い間隙付近では転がるものの、この付近を離れると、比較的大きな隙間が生じるためすべり接触或いは回転しながらすべり接触する。   The recess 31a of the clutch inner ring 31 is formed such that the gap with the inner peripheral surface 32b of the opposing clutch outer ring 32 gradually becomes wider (or narrower) in the circumferential direction. This gap is smaller than the diameter of the roller 33 at the narrowest portion and larger than the diameter of the roller 33 at the widest portion. For this reason, the roller 33 is sandwiched in the narrowest gap and rolls in the vicinity of the narrowest gap, but when leaving the vicinity, a relatively large gap is generated, so that the roller 33 is in sliding contact while sliding or rotating.

クラッチ用保持器３４は、クラッチ用内輪３１の凹部３１ａと同数のローラ３３を円周方向に略等間隔に、且つ、ローラ３３が前記移動が可能であるように保持するものである。なお、図１ではクラッチ用保持器３４の一端部にはスリーブ１１側に突起した係止突部３４ａが形成されており、この係止突部３４ａがスリーブ１１の突部１１Ｂとクラッチ用内輪３１との間に配設されることで、クラッチ用保持器３４の軸方向への移動が抑制されている。
また、このクラッチ用保持器３４には、図示しない柱部にばねが設けられており、これによって、ローラ３３には、クラッチ用内輪３１の凹部３１ａとこれに対向するクラッチ用外輪３２の内周面との間隙が狭くなる方向に押し出すような力が加えられる。 The clutch retainer 34 holds the same number of rollers 33 as the recesses 31a of the clutch inner ring 31 at substantially equal intervals in the circumferential direction so that the rollers 33 can move. In FIG. 1, a locking protrusion 34 a protruding toward the sleeve 11 is formed at one end of the clutch retainer 34, and the locking protrusion 34 a is connected to the protrusion 11 </ b> B of the sleeve 11 and the clutch inner ring 31. The movement of the clutch retainer 34 in the axial direction is suppressed.
Further, the clutch retainer 34 is provided with a spring in a column portion (not shown), whereby the roller 33 is provided with a recess 31a of the clutch inner ring 31 and an inner periphery of the clutch outer ring 32 opposed thereto. A force that pushes out in the direction in which the gap with the surface becomes narrower is applied.

このような構成の一方向クラッチ内蔵型回転伝達装置は、無端ベルトの走行によって、プーリ１２が所定方向に相対回転すると、これに内嵌したクラッチ用外輪３２も所定方向に回転し、これに伴ってローラ３３がクラッチ用内輪３１の凹部３１ａとクラッチ用外輪３２の内周面３２ｂとの間隙が狭くなる方へ移動する。そして、クラッチ用保持器３４のばねにも押し出されることで、ローラ３３は、クラッチ用内輪３１の凹部３１ａとクラッチ用外輪３２の内周面３２ｂとの間に食い込み、自転を止めてクラッチ用内輪３１とクラッチ用外輪３２とを接続する（クラッチロック状態）。これにより、プーリ１２からスリーブ１１へ回転力が伝達されるようになる。この状態は、無端ベルトの走行速度が一定又は上昇する限り継続する。   In the one-way clutch built-in type rotation transmission device having such a configuration, when the pulley 12 relatively rotates in a predetermined direction due to running of the endless belt, the clutch outer ring 32 fitted therein rotates in the predetermined direction. Thus, the roller 33 moves in such a manner that the gap between the concave portion 31a of the clutch inner ring 31 and the inner peripheral surface 32b of the clutch outer ring 32 becomes narrower. When the roller 33 is also pushed out by the spring of the clutch retainer 34, the roller 33 bites between the concave portion 31 a of the clutch inner ring 31 and the inner peripheral surface 32 b of the clutch outer ring 32, thereby stopping rotation and stopping the inner ring for clutch. 31 and the outer ring for clutch 32 are connected (clutch locked state). Thereby, the rotational force is transmitted from the pulley 12 to the sleeve 11. This state continues as long as the traveling speed of the endless belt is constant or increases.

一方、無端ベルトの走行速度が減速すると、これに伴いプーリ１２には前記所定方向とは逆方向への制動力が作用するが、スリーブ１１は慣性により一定速度で前記所定方向への回転を継続しようとする。これに従って、ローラ３３も、クラッチ用内輪３１の凹部３１ａとクラッチ用外輪３２の内周面３２ｂとの間隙が広くなる方にすべり接触しつつ移動し、ロック状態が解除され、クラッチ用内輪３１とクラッチ用外輪３２との接続が切断される（オーバラン状態）。この状態では、転がり軸受２，２によって支持されて、プーリ１２がスリーブ１１に対して前記所定方向とは逆方向に相対回転する。   On the other hand, when the traveling speed of the endless belt is reduced, a braking force in the direction opposite to the predetermined direction acts on the pulley 12, but the sleeve 11 continues to rotate in the predetermined direction at a constant speed due to inertia. try to. In accordance with this, the roller 33 also moves while sliding in the direction in which the gap between the recess 31a of the clutch inner ring 31 and the inner peripheral surface 32b of the clutch outer ring 32 becomes wider, the locked state is released, and the clutch inner ring 31 and The connection with the outer ring for clutch 32 is disconnected (overrun state). In this state, supported by the rolling bearings 2 and 2, the pulley 12 rotates relative to the sleeve 11 in the direction opposite to the predetermined direction.

これにより、オルタネータの回転軸Ｓの回転速度が変動した場合であっても、無端ベルトとプーリ１２とが触れ合うことが防止され、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できるとともに、オルタネータの発電効率が低下することを防止できる。
また、このような一方向クラッチ内蔵型回転伝達装置で用いる潤滑剤として、特許文献１では、転がり接触する各転がり軸受２の内部空間に配される潤滑剤Ｊ１と、すべり接触する一方向クラッチ３の内部空間に配される潤滑剤Ｊ２とに、それぞれ異なる性能のグリース組成物を用いることが提案されている。
特開２００２−１３０４３３号公報 As a result, even when the rotational speed of the rotating shaft S of the alternator fluctuates, the endless belt and the pulley 12 are prevented from coming into contact with each other. In addition, it is possible to prevent the power generation efficiency of the alternator from decreasing.
Further, as a lubricant used in such a one-way clutch built-in type rotation transmission device, in Patent Document 1, the lubricant J1 disposed in the inner space of each rolling bearing 2 that comes into rolling contact with the one-way clutch 3 that comes into sliding contact. It has been proposed to use grease compositions having different performances for the lubricant J2 disposed in the interior space.
JP 2002-130433 A

しかしながら、上述した特許文献１に記載の一方向クラッチ内蔵型回転伝達装置では、一方向クラッチと転がり軸受とでそれぞれ異なるグリース組成物を用いているため、異種のグリース組成物が漏出して混合することにより、硬化或いは軟化して潤滑性能が劣化する場合がある。
このため、一方向クラッチ内蔵型回転伝達装置で用いられる潤滑剤としては、一方向クラッチと転がり軸受とで同一の潤滑剤を用いることが好ましい。 However, since the one-way clutch built-in type rotation transmission device described in Patent Document 1 uses different grease compositions for the one-way clutch and the rolling bearing, different types of grease compositions leak and mix. As a result, the lubricating performance may deteriorate due to curing or softening.
For this reason, it is preferable to use the same lubricant for the one-way clutch and the rolling bearing as the lubricant used in the one-way clutch built-in rotation transmission device.

また、一方向クラッチ内蔵型回転伝達装置で用いられる潤滑剤としては、一方向クラッチのクラッチロック性能に優れ、且つ、オーバーラン状態で一方向クラッチがすべり接触する際に低摩擦・低摩耗特性が得られるとともに、低温（例えば−４０℃）から高温（例えば１６０℃）まで幅広い温度域での使用に適し、振動等によるフレッチング摩耗に対する耐久性が必要とされる。   The lubricant used in the rotation transmission device with a built-in one-way clutch is excellent in clutch locking performance of the one-way clutch and has low friction and low wear characteristics when the one-way clutch is in sliding contact in an overrun state. In addition to being obtained, it is suitable for use in a wide temperature range from a low temperature (for example, −40 ° C.) to a high temperature (for example, 160 ° C.), and durability against fretting wear due to vibration or the like is required.

しかしながら、従来の一方向クラッチ内蔵型回転伝達装置用潤滑剤では、上述した全ての条件（一方向クラッチと転がり軸受との両方で好適に使用可能，優れたクラッチロック性能，すべり接触時の低摩擦・低摩耗特性，幅広い温度域で好適に使用可能，優れた耐フレッチング性）を満たし、一方向クラッチ内蔵型回転伝達装置に優れた耐久性を付与するという点で未だ改善の余地があった。
そこで、本発明は、上記事情に鑑みてなされたものであり、一方向クラッチ内蔵型回転伝達装置に優れた耐久性を付与できる一方向クラッチ内蔵型回転伝達装置用潤滑剤を提供することを課題としている。 However, the conventional lubricant for a rotation transmission device with a built-in one-way clutch can be suitably used for all the above-mentioned conditions (one-way clutch and a rolling bearing, excellent clutch locking performance, low friction at the time of sliding contact) -There is still room for improvement in terms of satisfying low wear characteristics, suitable use in a wide temperature range, excellent fretting resistance, and providing excellent durability to the one-way clutch built-in rotation transmission device.
Therefore, the present invention has been made in view of the above circumstances, and it is an object to provide a lubricant for a rotation transmission device with a built-in one-way clutch that can impart excellent durability to the rotation transmission device with a built-in one-way clutch. It is said.

このような課題を解決するために、本発明は、同心に配置された一対の回転部材と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記一対の回転部材を相対回転自在に支持する転がり軸受と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記回転部材の一方を他方に対して所定方向に相対回転させる回転力のみを伝達する一方向クラッチと、を備えた一方向クラッチ内蔵型回転伝達装置の前記転がり軸受及び前記一方向クラッチの潤滑に用いられる潤滑剤において、動摩擦係数が０．０８以上０．１４以下のイオン性液体が含有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用潤滑剤を提供する。   In order to solve such a problem, the present invention is provided between a pair of rotating members arranged concentrically and the circumferential surfaces of the pair of rotating members facing each other, and the pair of rotating members are relative to each other. Provided between a rolling bearing that is rotatably supported and the circumferential surfaces of the pair of rotating members that face each other, and transmits only a rotational force that relatively rotates one of the rotating members relative to the other in a predetermined direction. In the lubricant used for lubricating the rolling bearing and the one-way clutch of the one-way clutch built-in type rotation transmission device having a one-way clutch, an ionic liquid having a dynamic friction coefficient of 0.08 or more and 0.14 or less is contained. A lubricant for a rotation transmission device with a built-in one-way clutch is provided.

本発明はまた、同心に配置された一対の回転部材と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記一対の回転部材を相対回転自在に支持する転がり軸受と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記回転部材の一方を他方に対して所定方向に相対回転させる回転力のみを伝達する一方向クラッチと、を備え、前記転がり軸受及び前記一方向クラッチが潤滑剤により潤滑された一方向クラッチ内蔵型回転伝達装置において、前記潤滑剤は、動摩擦係数が０．０８以上０．１４以下であるイオン性液体を含有し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を提供する。   The present invention also includes a pair of rotating members arranged concentrically, and a rolling bearing provided between the circumferential surfaces facing each other of the pair of rotating members and supporting the pair of rotating members so as to be relatively rotatable, A one-way clutch provided between peripheral surfaces of the pair of rotating members facing each other and transmitting only a rotational force that relatively rotates one of the rotating members in a predetermined direction with respect to the other. In the one-way clutch built-in rotation transmission device in which the bearing and the one-way clutch are lubricated by a lubricant, the lubricant contains an ionic liquid having a dynamic friction coefficient of 0.08 or more and 0.14 or less. A rotation transmission device with a built-in one-way clutch is provided.

本発明の一方向クラッチ内蔵型回転伝達装置は、例えば、オルタネータや、コンプレッサ、ウォータポンプ、冷却ファン等自動車用補機の従動軸に取り付け、補機駆動装置やエンジンからの所定方向の回転力を伝達させるために好適に用いられる。また、本発明の一方向クラッチ内蔵型回転伝達装置は、例えば、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駆動軸等に装着し、エンジン又は補機駆動装置の一方が運転状態、他方が停止状態にある場合に、運転状態にある一方の回転力のみを伝達し、停止状態にある他方の駆動軸を回転させないようにするために好適に用いることができる。   The rotation transmission device with a built-in one-way clutch of the present invention is attached to a driven shaft of an auxiliary machine for an automobile such as an alternator, a compressor, a water pump, a cooling fan, and the like. It is preferably used for transmission. In addition, the one-way clutch built-in type rotation transmission device of the present invention is mounted on, for example, an engine crankshaft mounted on an idling stop vehicle and a drive shaft of an accessory drive device, and one of the engine or the accessory drive device is operated. When the other state is in the stopped state, it can be suitably used to transmit only one rotational force in the operating state and prevent the other driving shaft in the stopped state from rotating.

このような一方向クラッチ内蔵型回転伝達装置の構成としては、特に限定されないが、例えば上述した図１に示す一方向クラッチ内蔵型回転伝達装置や、クラッチ用外輪として鍔がない円筒形状の構造を採用した一方向クラッチ内蔵型回転伝達装置や、プーリの内周面及びスリーブの外周面を、直接一方向クラッチの外輪軌道面及び内輪軌道面として利用した一方向クラッチ内蔵型回転伝達装置が挙げられる。また、一方向クラッチの形態は、図１に示すようにローラクラッチであってもよいし、スプラグクラッチ等の従来から知られている他の形態であってもよい。   The configuration of such a one-way clutch built-in type rotation transmission device is not particularly limited. For example, the one-way clutch built-in type rotation transmission device shown in FIG. One-way clutch built-in type rotation transmission device adopted, and one-way clutch built-in type rotation transmission device that directly uses the inner peripheral surface of the pulley and the outer peripheral surface of the sleeve as the outer ring raceway surface and inner ring raceway surface of the one-way clutch. . The one-way clutch may be a roller clutch as shown in FIG. 1 or may be another conventionally known form such as a sprag clutch.

また、本発明の一方向クラッチ内蔵型回転伝達装置に組み込まれる転がり軸受としては、特に限定されないが、例えば、上述した図１に示す玉軸受やころ軸受が挙げられ、これらを単独又は組み合わせたものが挙げられる。さらに、転がり軸受は、上述した図１に示すように、両端部にシールを設けて軸受内部空間を密封した形態としてもよいし、転がり軸受の両端部のうち一方向クラッチ配設側の端部にはシールを設置しない形態としてもよい。
さらに、本発明の一方向クラッチ内蔵型回転伝達装置に組み込まれる回転部材としては、特に限定されず、例えば、上述した図１に示すプーリや、歯車が挙げられる。 Further, the rolling bearing incorporated in the one-way clutch built-in rotation transmission device of the present invention is not particularly limited, and examples thereof include the ball bearing and the roller bearing shown in FIG. 1 described above, which are used alone or in combination. Is mentioned. Furthermore, as shown in FIG. 1 described above, the rolling bearing may have a form in which seals are provided at both ends to seal the bearing internal space, or the end of the rolling bearing on the side where the one-way clutch is disposed. It is good also as a form which does not install a seal | sticker.
Furthermore, it does not specifically limit as a rotation member integrated in the rotation transmission apparatus with a built-in one-way clutch of this invention, For example, the pulley shown in FIG. 1 mentioned above and a gearwheel are mentioned.

以下、本発明で用いられる潤滑剤について詳細に説明する。
＜潤滑剤について＞
本発明で用いられる潤滑剤は、陽イオン（カチオン）と陰イオン（アニオン）とが組み合わされてなり、常温で液体のイオン性液体（常温溶融塩）のうち、動摩擦係数が０．０８以上０．１４以下のものを含有している。このイオン性液体を含有した潤滑剤では、カチオンとアニオンがイオン結合で強く結びついているため、不燃性及び不揮発性で、且つ、優れた熱安定性を有している。よって、幅広い温度域で蒸発せず安定して潤滑膜を形成することができる。 Hereinafter, the lubricant used in the present invention will be described in detail.
<About lubricant>
The lubricant used in the present invention is a combination of a cation (cation) and an anion (anion), and the kinetic coefficient of friction is 0.08 or more among ionic liquids (room temperature molten salts) that are liquid at room temperature. .14 or less is contained. In the lubricant containing this ionic liquid, the cation and the anion are strongly bonded by an ionic bond, so that it is nonflammable and non-volatile, and has excellent thermal stability. Therefore, the lubricating film can be stably formed without evaporating in a wide temperature range.

イオン性液体としては、特に限定されないが、例えば化学式（１）〜（６）に示すように、脂肪族アミン、脂環式アミン系、イミダゾリウム系、ピリジン系等のカチオンと、アニオン（Ｘ- ）との組合せが挙げられる。これらのイオン性液体は、単独で用いてもよいし、二種以上組み合わせて用いてもよい。なお、化学式（１）〜（６）中のアニオン（Ｘ- ）の具体例としては、ＢＦ4 - 、ＰＦ6 - 、［（ＣＦ3 ＳＯ2 ）2 ］Ｎ- 、Ｃｌ- 、Ｂｒ- 等が挙げられる。また、化学式（１）〜（６）中のＲは、アルキル基又はアルコキシ基を示す。 The ionic liquid is not particularly limited. For example, as shown in the chemical formulas (1) to (6), a cation such as an aliphatic amine, an alicyclic amine, an imidazolium, or a pyridine, and an anion (X − ) And a combination thereof. These ionic liquids may be used alone or in combination of two or more. Specific examples of the anion (X − ) in the chemical formulas (1) to (6) include BF 4 − , PF 6 − , [(CF 3 SO 2 ) 2 ] N − , Cl − , Br − and the like. Can be mentioned. R in chemical formulas (1) to (6) represents an alkyl group or an alkoxy group.

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特に、化学式（３），（４）に示すイミダゾリウム系カチオンを用いたイオン性液体を用いることが好ましく、イミダゾリウム系カチオンに含まれるＲの炭素鎖長を長くすることがより好ましく、Ｒの炭素数を２以上とすることがさらに好ましい。これにより、イオン間の静電気相互作用が弱まり、潤滑剤の流動点が下がる一方、炭素鎖の分子間相互作用が強まり、潤滑剤の動粘度を増加させることができるため、潤滑剤をより幅広い温度域で使用することが可能となる。   In particular, it is preferable to use an ionic liquid using an imidazolium cation represented by the chemical formulas (3) and (4), more preferably to increase the carbon chain length of R contained in the imidazolium cation, More preferably, the number of carbon atoms is 2 or more. This weakens the electrostatic interaction between ions and lowers the pour point of the lubricant, while strengthening the intermolecular interaction of the carbon chains and increasing the kinematic viscosity of the lubricant, thus allowing the lubricant to be It can be used in the area.

このようなイオン性液体は、４０℃における動粘度がおよそ１２〜２６０ｍｍ2 ／ｓ程度で、アルキル基やアルコキシ基の炭素数が多く分子量が大きくなる程、動粘度が大きくなることが知られている。
ここで、イオン性液体の動摩擦係数が０．０８未満であると、係合角αの正接、すなわちｔａｎαが動摩擦係数よりも小さくなるため、係合性に不利になる。一方、イオン性液体の動摩擦係数が０．１４よりも大きくなると、摩耗が促進して、係合性が不利になる。 It is known that such ionic liquid has a kinematic viscosity at 40 ° C. of about 12 to 260 mm 2 / s, and the kinematic viscosity increases as the number of carbon atoms of the alkyl group or alkoxy group increases and the molecular weight increases. Yes.
Here, when the dynamic friction coefficient of the ionic liquid is less than 0.08, the tangent of the engagement angle α, that is, tan α is smaller than the dynamic friction coefficient, which is disadvantageous for the engagement. On the other hand, when the dynamic friction coefficient of the ionic liquid is larger than 0.14, wear is promoted and engagement is disadvantageous.

また、本発明の潤滑剤においては、上述したイオン性液体に加えて、各種性能を向上させるための添加剤を加えてもよい。添加剤としては、例えば、酸化防止剤、防錆剤、極圧剤、油性向上剤、金属不活性化剤、腐食防止剤を単独又は二種以上組み合わせたものが挙げられる。
これらの添加剤の配合割合は、本発明の効果を損なわない程度であれば特に限定されないが、潤滑剤全体に対して０．１〜１０質量％とするのが一般的である。ここで、添加剤の配合割合が０．１質量％未満であると、添加剤による効果を十分に得ることが困難になり、一方、添加剤の配合割合が１０質量％を超えると、添加剤による効果が飽和するとともに、潤滑剤に対するイオン性液体の配合割合が相対的に少なくなるため、潤滑性が低下するおそれがある。 In the lubricant of the present invention, additives for improving various performances may be added in addition to the ionic liquid described above. Examples of the additive include an antioxidant, a rust inhibitor, an extreme pressure agent, an oiliness improver, a metal deactivator, and a combination of two or more corrosion inhibitors.
The blending ratio of these additives is not particularly limited as long as the effect of the present invention is not impaired, but is generally 0.1 to 10% by mass with respect to the entire lubricant. Here, if the additive proportion is less than 0.1% by mass, it is difficult to sufficiently obtain the effect of the additive. On the other hand, if the additive proportion exceeds 10% by mass, the additive Since the effect of the saturating is saturated and the blending ratio of the ionic liquid to the lubricant is relatively reduced, the lubricity may be lowered.

酸化防止剤としては、例えば、アミン系、フェノール系、硫黄系、ジチオリン酸亜鉛が挙げられる。
アミン系酸化防止剤の具体例としては、フェニル−１−ナフチルアミン、フェニル−２−ナフチルアミン、ジフェニルアミン、フェニレンジアミン、オレイルアミドアミン、フェノリアジンが挙げられる。 Examples of the antioxidant include amine-based, phenol-based, sulfur-based, and zinc dithiophosphate.
Specific examples of amine-based antioxidants include phenyl-1-naphthylamine, phenyl-2-naphthylamine, diphenylamine, phenylenediamine, oleylamidoamine, and phenolazine.

フェノール系酸化防止剤の具体例としては、ｐ−ｔ−ブチル−フェニルサリシレート、２，６−ジ−ｔ−ブチル−ｐ−フェニルフェノール、２，２' −メチレンビス（４−メチル−６−ｔ−オクチルフェノール）、４，４' −ブチリデンビス−６−ｔ−ブチル−ｍ−クレゾール、テトラキス［メチレン−３−（３' ，５' −ジ−ｔ−ブチル−４' −ヒドロキシフェニル）プロピオネート］メタン、１，３，５−トリメチル−２，４，６−トリス（３，５−ジ−ｔ−ブチル−４−ヒドロキシベンジル）ベンゼン、ｎ−オクタデシル−β−（４' −ヒドロキシ−３' ，５' −ジ−ｔ−ブチルフェニル）プロピオネート、２−ｎ−オクチル−チオ−４，６−ジ（４' −ヒドロキシ−３' ，５' −ジ−ｔ−ブチル）フェノキシ−１，３，５−トリアジン、４，４' −チオビス（６−ｔ−ブチル−ｍ−クレゾール）、２−（２' −ヒドロキシ−３' −ｔ−ブチル−５' −メチルフェニル）−５−クロロベンゾトリアゾール等のヒンダードフェノールが挙げられる。   Specific examples of the phenolic antioxidant include pt-butyl-phenyl salicylate, 2,6-di-t-butyl-p-phenylphenol, 2,2′-methylenebis (4-methyl-6-t- Octylphenol), 4,4′-butylidenebis-6-t-butyl-m-cresol, tetrakis [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate] methane, 1 , 3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, n-octadecyl-β- (4'-hydroxy-3 ', 5'- Di-t-butylphenyl) propionate, 2-n-octyl-thio-4,6-di (4′-hydroxy-3 ′, 5′-di-t-butyl) phenoxy-1,3,5-triazine, 4, Examples include hindered phenols such as' -thiobis (6-t-butyl-m-cresol) and 2- (2'-hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole. .

防錆剤としては、例えば、エステル類が挙げられる。エステル類の具体例としては、多塩基カルボン酸及び多価アルコールの部分エステルであるソルビタンモノラウレート、ソルビタントリステアレート、ソルビタンモノオレエート、ソルビタントリオレエート等のソルビタンエステル類や、ポリオキシエチレンラウレート、ポリオキシエチレンオレエート、ポリオキシエチレンステアレート等のアルキルエステル類が挙げられる。   Examples of the rust preventive include esters. Specific examples of the esters include sorbitan esters such as sorbitan monolaurate, sorbitan tristearate, sorbitan monooleate and sorbitan trioleate, which are partial esters of polybasic carboxylic acid and polyhydric alcohol, and polyoxyethylene laurate. Examples thereof include alkyl esters such as rate, polyoxyethylene oleate, and polyoxyethylene stearate.

油性向上剤としては、例えば、オレイン酸、ステアリン酸等の脂肪酸や、ラウリルアルコール、オレイルアルコール等のアルコールや、スタアリルアミン、セチルアミン等のアミンや、リン酸トリクレジル等のリン酸エステルや、動植物油が挙げられる。
極圧剤としては、例えば、リン系や、ジチオリン酸亜鉛や、有機モリブデンが挙げられ、金属不活性化剤としては、例えば、ベンゾトリアゾールが挙げられ、腐食防止剤としては、例えばベントリ系が挙げられる。 Examples of the oiliness improver include fatty acids such as oleic acid and stearic acid, alcohols such as lauryl alcohol and oleyl alcohol, amines such as starylamine and cetylamine, phosphate esters such as tricresyl phosphate, and animal and vegetable oils. Can be mentioned.
Examples of extreme pressure agents include phosphorus, zinc dithiophosphate, and organic molybdenum. Examples of metal deactivators include benzotriazole. Examples of corrosion inhibitors include bentri. It is done.

本発明の一方向クラッチ内蔵型回転伝達装置用潤滑剤によれば、特定の動摩擦係数のイオン性液体が含有されていることにより、一方向クラッチ及び転がり軸受の各転がり面に、幅広い温度域で安定して潤滑膜を形成することができる。よって、本発明の一方向クラッチ内蔵型回転伝達装置用潤滑剤を用いることにより、優れた耐久性を備えた一方向クラッチ内蔵型回転伝達装置を得ることができる。   According to the lubricant for a rotation transmission device with a built-in one-way clutch of the present invention, since the ionic liquid having a specific dynamic friction coefficient is contained, the rolling surfaces of the one-way clutch and the rolling bearing can be applied over a wide temperature range. A lubricating film can be formed stably. Therefore, by using the lubricant for a one-way clutch built-in type rotation transmission device of the present invention, a one-way clutch built-in type rotation transmission device having excellent durability can be obtained.

以下、本発明の実施形態について詳細に説明する。
本実施形態では、表１に示す各種潤滑剤を用いて、すべり接触時の性能を評価する往復動摩擦試験と、摩擦係数を評価するボールオンディスク試験と、クラッチ動作の正確性を評価する係合性試験と、を以下に示す条件で行った。
なお、表１に示す各種潤滑剤には、いずれも酸化防止剤としてジオクチルジフェニルアミンを約２質量％配合し、防錆剤としてバリウムスルホネートを約１質量％配合し、腐食防止剤としてベントリ系のものを０．０５質量％配合した。また、表１には、得られた潤滑剤の４０℃における動粘度及び流動点も併せて示した。
また、表１で示す潤滑剤「イオン性液体Ａ」〜「イオン性液体Ｇ」は、後述する化学式（Ａ）〜（Ｇ）に示すアニオンとカチオンとからなるイオン性液体を指す。 Hereinafter, embodiments of the present invention will be described in detail.
In this embodiment, by using various lubricants shown in Table 1, a reciprocating friction test for evaluating the performance at the time of sliding contact, a ball-on-disk test for evaluating the coefficient of friction, and an engagement for evaluating the accuracy of the clutch operation. The property test was conducted under the following conditions.
Each lubricant shown in Table 1 contains about 2% by mass of dioctyl diphenylamine as an antioxidant, about 1% by mass of barium sulfonate as an antirust agent, and a Bentley type as a corrosion inhibitor. Of 0.05% by mass. Table 1 also shows the kinematic viscosity and pour point of the obtained lubricant at 40 ° C.
Moreover, the lubricants “ionic liquid A” to “ionic liquid G” shown in Table 1 indicate ionic liquids composed of anions and cations represented by chemical formulas (A) to (G) described later.

Figure 2007002913
Figure 2007002913

Figure 2007002913
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Figure 2007002913
Figure 2007002913

Figure 2007002913
Figure 2007002913

Figure 2007002913
Figure 2007002913

Figure 2007002913
Figure 2007002913

Figure 2007002913
Figure 2007002913

＜往復動摩擦試験について＞
表１に示す各種潤滑剤について、図２に示すように往復動摩擦試験を行い、すべり接触時の性能評価を行った。
この往復動摩擦試験は、図２に示すように、試験台９１に載置した試験平板（ＳＵＪ２製、ＨＲＣ６０〜６４）９４に、供試体である潤滑剤を約０．０５ｍｍの厚さで塗布し、ヒータ９２によって１４０℃で２時間加熱した後、室温になるまで放置した。 <Reciprocating friction test>
The various lubricants shown in Table 1 were subjected to a reciprocating friction test as shown in FIG. 2, and performance evaluation at the time of sliding contact was performed.
In this reciprocating friction test, as shown in FIG. 2, a lubricant as a specimen is applied to a test plate 94 (manufactured by SUJ2, HRC 60-64) 94 placed on a test table 91 at a thickness of about 0.05 mm. Then, after heating at 140 ° C. for 2 hours by the heater 92, it was left until it reached room temperature.

そして、潤滑剤を塗布した試験平板９４に直径１０ｍｍの試験球９５を押し付け、９８Ｎの垂直荷重を加えつつ、カム９７によって試験球９５を３０分間往復運動（周波数：１０Ｈｚ、振幅：２ｍｍ）させた後、試験球の摩耗痕径（ｍｍ）を測定した。なお、図２中の符号９３はヒータ９２による加熱温度を検知するための熱電対であり、符号９６はカム９７の往復運動を観測するためのロードセルである。この結果は、表１に併せて示した。   Then, a test ball 95 having a diameter of 10 mm was pressed against a test flat plate 94 coated with a lubricant, and the test ball 95 was reciprocated for 30 minutes (frequency: 10 Hz, amplitude: 2 mm) by a cam 97 while applying a vertical load of 98 N. Thereafter, the wear scar diameter (mm) of the test ball was measured. 2 is a thermocouple for detecting the heating temperature by the heater 92, and 96 is a load cell for observing the reciprocating motion of the cam 97. The results are also shown in Table 1.

＜ボールオンディスク試験について＞
表１に示す各種潤滑剤について、公知のボールオンディスク試験を行い、摩擦係数の評価を行った。
このボールオンディスク試験は、潤滑剤に浸された試験平板（ＳＵＪ２製、ＨＲＣ６０〜６４）に直径１０ｍｍの試験球（ＳＵＪ２製、ＨＲＣ６０〜６４）を押し付け、２ＧＰａの垂直荷重を加えつつ、試験球をすべり運動（すべり速度：０．０１ｍ／ｓ、試験温度：常温）させて、摩擦係数を測定した。この結果は、表１に併せて示した。 <About the ball-on-disk test>
The various lubricants shown in Table 1 were subjected to a known ball-on-disk test, and the coefficient of friction was evaluated.
In this ball-on-disk test, a test ball having a diameter of 10 mm (SUJ2, made by HRC 60-64) is pressed against a test flat plate (SUJ2, made by HRC 60-64) immersed in a lubricant, while applying a vertical load of 2 GPa. Was subjected to a sliding motion (sliding speed: 0.01 m / s, test temperature: normal temperature), and the friction coefficient was measured. The results are also shown in Table 1.

＜係合性試験について＞
表１に示す各種潤滑剤を、上述した図１に示す一方向クラッチ内蔵型回転伝達装置の各転がり軸受２及び一方向クラッチ３の内部空間内の潤滑剤Ｊ１，Ｊ２として封入し、内外輪２１，２２の対向する部分に印を付けた後、低温状態（約−２５℃）で１０分間数回にわたって係合させることにより、回転の追従状態を調べた。この結果は、試験後に内外輪２１，２２の対向する部分に付けた印がずれていない場合を合格とし、ずれていた場合を不合格として、表１に併せて示した。 <About engagement test>
Various lubricants shown in Table 1 are sealed as lubricants J1 and J2 in the inner space of the rolling bearing 2 and the one-way clutch 3 of the one-way clutch built-in type rotation transmission device shown in FIG. , 22 were marked, and then engaged for several times in a low temperature state (about −25 ° C.) for 10 minutes to examine the rotational follow-up state. The results are shown in Table 1 together with the case where the marks on the opposing parts of the inner and outer rings 21 and 22 are not shifted after the test as acceptable and the case where they are displaced as unacceptable.

Figure 2007002913
Figure 2007002913

表１に示すように、本発明のイオン性液体（動摩擦係数が０．０８以上０．１４以下）を含有してなる潤滑剤Ｎｏ．１〜Ｎｏ．５では、本発明以外のイオン性液体を含有してなる潤滑剤Ｎｏ．６，Ｎｏ．７や、エステル油を含有してなる潤滑剤Ｎｏ．８や、ＰＡＯ（ポリα−オレフィン油）を含有してなる潤滑剤Ｎｏ．９と比較して、すべり接触時に低摩擦性能が得られ、且つ、優れた係合性が得られた。
以上の結果より、本発明のイオン性液体を含有してなる潤滑剤Ｎｏ．１〜Ｎｏ．５を、上述した図１に示す一方向クラッチ内蔵型回転伝達装置の各転がり軸受２及び一方向クラッチ３の各内部空間に配される潤滑剤Ｊ１，Ｊ２として用いることで、一方向クラッチ内蔵型回転伝達装置に優れた耐久性が得られることが確認できた。 As shown in Table 1, lubricant No. 1 containing the ionic liquid of the present invention (dynamic friction coefficient is 0.08 or more and 0.14 or less). 1-No. No. 5 is a lubricant No. 5 containing an ionic liquid other than the present invention. 6, no. 7 and lubricant No. 7 containing ester oil. 8 and lubricant No. 8 containing PAO (poly α-olefin oil). Compared to 9, low friction performance was obtained at the time of sliding contact, and excellent engagement was obtained.
From the above results, lubricant No. 1 containing the ionic liquid of the present invention was obtained. 1-No. 5 is used as the lubricants J1 and J2 disposed in the internal spaces of the rolling bearings 2 and the one-way clutch 3 of the one-way clutch built-in type rotation transmission device shown in FIG. It was confirmed that excellent durability was obtained for the rotation transmission device.

本発明の一方向クラッチ内蔵型回転伝達装置の一例を示す断面図である。It is sectional drawing which shows an example of the rotation transmission apparatus with a built-in one-way clutch of this invention. 往復動摩擦試験について示す図である。It is a figure shown about a reciprocating friction test.

符号の説明Explanation of symbols

１１ スリーブ
１１ａ 外周面
１１Ａ 大径部
１１Ｂ 突部
１２ プーリ
１２ａ 内周面
２ 転がり軸受
２１ 内輪
２２ 外輪
２４ 保持器
２５ シール
３ 一方向クラッチ
３１ クラッチ用内輪
３１ａ 凹部
３２ クラッチ用外輪
３２ａ 鍔
３２ｂ 内周面
３３ ローラ
３４ クラッチ用保持器 11 Sleeve 11a Outer peripheral surface 11A Large diameter portion 11B Protrusion 12 Pulley 12a Inner peripheral surface 2 Rolling bearing 21 Inner ring 22 Outer ring 24 Cage 25 Seal 3 One-way clutch 31 Clutch inner ring 31a Recess 32 Clutch outer ring 32a 鍔 32b Inner peripheral surface 33 Roller 34 Clutch retainer

Claims (2)

同心に配置された一対の回転部材と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記一対の回転部材を相対回転自在に支持する転がり軸受と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記回転部材の一方を他方に対して所定方向に相対回転させる回転力のみを伝達する一方向クラッチと、を備えた一方向クラッチ内蔵型回転伝達装置の前記転がり軸受及び前記一方向クラッチの潤滑に用いられる潤滑剤において、
動摩擦係数が０．０８以上０．１４以下のイオン性液体が含有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用潤滑剤。 A pair of rotating members arranged concentrically, a rolling bearing provided between the opposed peripheral surfaces of the pair of rotating members, and supporting the pair of rotating members so as to be relatively rotatable, and the pair of rotating members One-way clutch built-in type rotation transmission provided with a one-way clutch that is provided between peripheral surfaces facing each other and transmits only a rotational force that relatively rotates one of the rotating members relative to the other in a predetermined direction. In the lubricant used for lubricating the rolling bearing and the one-way clutch of the apparatus,
A lubricant for a rotation transmission device with a built-in one-way clutch, characterized by containing an ionic liquid having a dynamic friction coefficient of 0.08 or more and 0.14 or less. 同心に配置された一対の回転部材と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記一対の回転部材を相対回転自在に支持する転がり軸受と、前記一対の回転部材の互いに対向する周面同士の間に設けられ、前記回転部材の一方を他方に対して所定方向に相対回転させる回転力のみを伝達する一方向クラッチと、を備え、前記転がり軸受及び前記一方向クラッチが潤滑剤により潤滑された一方向クラッチ内蔵型回転伝達装置において、
前記潤滑剤は、動摩擦係数が０．０８以上０．１４以下のイオン性液体が含有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, a rolling bearing provided between the opposed peripheral surfaces of the pair of rotating members, and supporting the pair of rotating members so as to be relatively rotatable, and the pair of rotating members And a one-way clutch that transmits only a rotational force that relatively rotates one of the rotating members in a predetermined direction with respect to the other. The rolling bearing and the one-way In the one-way clutch built-in rotation transmission device in which the clutch is lubricated by a lubricant,
The one-way clutch built-in type rotation transmission device, wherein the lubricant contains an ionic liquid having a dynamic friction coefficient of 0.08 or more and 0.14 or less.
JP2005183490A 2005-06-23 2005-06-23 Lubricant for rotation transmission device with built-in one-way clutch and rotation transmission device with built-in one-way clutch Pending JP2007002913A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125690A1 (en) * 2008-04-10 2009-10-15 Ntn株式会社 Grease composition and grease-sealed bearing
JP2012026320A (en) * 2010-07-21 2012-02-09 Toyota Motor Corp Lubricating device
FR2995056A1 (en) * 2012-09-04 2014-03-07 Skf Ab MECHANICAL SYSTEM WITH A UNIDIRECTIONAL CLUTCH, ALTERNATOR AND METHOD FOR MANUFACTURING SUCH A SYSTEM
DE102020203358A1 (en) 2020-03-16 2021-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Wet-running, switchable friction clutch, motor vehicle with such a friction clutch, as well as methods for operating the friction clutch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125690A1 (en) * 2008-04-10 2009-10-15 Ntn株式会社 Grease composition and grease-sealed bearing
US8329623B2 (en) 2008-04-10 2012-12-11 Ntn Corporation Grease composition and grease-sealed bearing
JP2012026320A (en) * 2010-07-21 2012-02-09 Toyota Motor Corp Lubricating device
FR2995056A1 (en) * 2012-09-04 2014-03-07 Skf Ab MECHANICAL SYSTEM WITH A UNIDIRECTIONAL CLUTCH, ALTERNATOR AND METHOD FOR MANUFACTURING SUCH A SYSTEM
DE102020203358A1 (en) 2020-03-16 2021-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Wet-running, switchable friction clutch, motor vehicle with such a friction clutch, as well as methods for operating the friction clutch
DE102020203358B4 (en) 2020-03-16 2022-12-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein Wet-running, switchable friction clutch, motor vehicle with such a friction clutch, and method for operating the friction clutch

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