WO2006057368A1 - 等速ジョイント用グリース組成物及び等速ジョイント - Google Patents
等速ジョイント用グリース組成物及び等速ジョイント Download PDFInfo
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- WO2006057368A1 WO2006057368A1 PCT/JP2005/021737 JP2005021737W WO2006057368A1 WO 2006057368 A1 WO2006057368 A1 WO 2006057368A1 JP 2005021737 W JP2005021737 W JP 2005021737W WO 2006057368 A1 WO2006057368 A1 WO 2006057368A1
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- constant velocity
- velocity joint
- grease composition
- joint
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Classifications
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
- F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
- F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
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- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
-
- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
-
- 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
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
- C10M2215/065—Phenyl-Naphthyl amines
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- 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
- C10M2215/10—Amides of carbonic or haloformic acids
- C10M2215/102—Ureas; Semicarbazides; Allophanates
- C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
-
- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
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- 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
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/041—Triaryl phosphates
-
- 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
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/046—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for traction drives
-
- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
- F16D2003/2026—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints with trunnion rings, i.e. with tripod joints having rollers supported by a ring on the trunnion
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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
- 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
Definitions
- the present invention relates to a grease composition for a constant velocity joint obtained by adding a predetermined component to a base oil, and a constant velocity joint in which the composition is enclosed in a boot.
- rotational power generated by various engines such as an internal combustion engine and a motor is also transmitted to a hub through a plurality of transmission shafts such as a differential shaft and a half shaft and a spline shaft, thereby rotating a tire. Travel with it.
- the differential gear and the spline shaft are connected via a so-called inboard side constant velocity joint, while the spline shaft and the hub are connected via a so-called outboard side constant velocity joint.
- the inboard side constant velocity joint serves to reduce both the angular displacement and axial displacement of the spline shaft
- the outboard side constant velocity joint serves to reduce the angular displacement of the spline shaft.
- chloroprene rubber or chlorinated polyethylene rubber (CM) has been adopted as the material of this type of boot, and grease is sealed in the boot.
- CM chlorinated polyethylene rubber
- a lubricating base oil and a grease are used as described in Patent Document 1 and Patent Document 2.
- a mixture of additives such as molybdenum disulfide, sulfur-based extreme pressure agent, phosphorus-based extreme pressure agent, etc., is widely used for base grease made of thium stone-based urea thickener.
- Patent Document 1 Japanese Patent Laid-Open No. 4 304300
- Patent Document 2 JP-A-6-184583
- the boots of the inboard side constant velocity joint with CR or CM force deteriorate earlier than the boots of the outboard side constant velocity joint with CR or CM force. That is, the tensile strength and tensile elongation are reduced in a relatively short time.
- the reason for this is that, as described above, the inboard side constant velocity joint is located closer to the engine than the outboard side constant velocity joint. It is assumed that it is easy to receive.
- the present inventor adjusted the grease with a component capable of ensuring the lubricity of the sliding contact portion of the constant velocity joint without generating radicals that attack TPC. As a result of further intensive studies on the production, the present invention has been achieved.
- a main object of the present invention is to provide a grease composition for a constant velocity joint sealed in a joint boot having a TPC force.
- Another object of the present invention is to provide a grease composition for a constant velocity joint in which a joint boot having a TPC force can be used over a long period of time.
- Still another object of the present invention is to provide a constant velocity joint having a Treasure boot having a TPC force and excellent heat resistance.
- Still another object of the present invention is to provide a constant velocity joint capable of ensuring the lubricity of the sliding portion over a long period of time.
- a constant velocity joint grease composition that constitutes a constant velocity joint and is enclosed in a joint boot made of a polyester-based thermoplastic elastomer resin.
- liquid components including base oil, urea compound thickener, solid molybdenum dithiocarbamate, and alkali metal borate hydrate,
- the ratio of the alkali metal borate hydrate to the total amount of the Dally composition for constant velocity joints is 0.1 to 10% by mass
- a grease composition for a constant velocity joint in which the content of sulfur contained in the liquid component is 0.6% by mass or less based on the total amount of the liquid component.
- solid molybdenum dithiocarbamate refers to molybdendithiocarnomate contained in a solid component when the grease composition for a constant velocity joint is separated into a liquid component and a solid component.
- Polyethylene thermoplastic elastomer is a multi-block copolymer containing polyester as a node segment in the molecule and a polyether or polyester having a glass transition temperature lower than that of the polyester as a soft segment. Is referred to. [0020] As described above, when the material of the boot also has a TPC force, the heat resistance of the boot is ensured over a long period of time by using a grease containing the above-described components.
- the grease yarn for a constant velocity joint and the composition preferably satisfy the following formula (1).
- A is a sulfur content ratio of the liquid component
- S is a sulfur content ratio of the base oil
- B is a content ratio of the base oil to the total amount of the grease composition for constant velocity joints
- C represents the content of the liquid component with respect to the total amount of the grease composition for constant velocity joints.
- the unit of A, S, B, C is mass%.
- one end portion is connected to the first transmission shaft and has a cylindrical portion that opens to the other end portion, and a predetermined interval is provided inside the cylindrical portion.
- An outer member provided with a plurality of guide grooves that are spaced apart from each other and extend toward the other end,
- An inner member having a sliding contact portion in sliding contact with the guide groove in the cylindrical portion of the outer member at one end portion, and the other end portion coupled to the second transmission shaft;
- a boot that covers the outer member and the second transmission shaft and each end is fixed to the outer transmission member and the second transmission shaft;
- Grease composition power for constant velocity joints enclosed in the boot containing a liquid component containing a base oil, urea compound thickener, solid molybdenum dithiocarbamate, and alkali metal borate hydrate,
- the ratio of the alkali metal borate hydrate to the total amount of the grease composition for constant velocity joints is 0.1 to 10% by mass
- a constant velocity joint in which the content of sulfur contained in the liquid component is 0.6% by mass or less with respect to the total amount of the liquid component is provided.
- the joint boot material is TPC
- the component that degrades TPC that is, the constant content of sulfur contained in the liquid component is equal to or less than a predetermined value.
- the grease composition is enclosed in the joint boot. For this reason, since deterioration of the joint boot is suppressed over a long period of time, leakage of grease is also avoided in the joint boot force. Therefore, the lubricity of the sliding contact portion of the constant velocity joint is ensured, and it is possible to avoid the seizure of the sliding contact portion.
- the grease composition for a constant velocity joint satisfies the above formula (1). That is, A is the sulfur content of the liquid component, S is the sulfur content of the base oil, B is the content of the base oil with respect to the total amount of the grease composition for the constant velocity joint, and C is the grease for the constant velocity joint.
- A is the sulfur content of the liquid component
- S is the sulfur content of the base oil
- B is the content of the base oil with respect to the total amount of the grease composition for the constant velocity joint
- C is the grease for the constant velocity joint.
- the units of A, S, B, and C are mass%.
- the constant velocity joint configured as described above is generally a sliding type constant velocity joint (for example, a triport type constant velocity joint) disposed on the differential gear side of the automobile body.
- the constant velocity joint is preferably employed as an inboard side constant velocity joint.
- the extreme pressure agent is not an essential component! /, But even if it contains a veg extreme pressure agent that improves the lubricity of the dull composition for a constant velocity joint. Good.
- the liquid component Sulfur-based extreme pressure agents may be used as long as the sulfur content in the liquid is 0.6 mass% or less with respect to the total amount of the liquid component.
- FIG. 1 is a schematic configuration diagram of a driving force transmission mechanism configured by incorporating a constant velocity joint according to the present embodiment.
- FIG. 2 is a schematic perspective view of a main part of the constant velocity joint according to the present embodiment.
- FIG. 3 is a partially cutaway side view of the constant velocity joint of FIG.
- FIG. 4 is a schematic cross-sectional view of the main part showing a state in which the boot is removed from the constant velocity joint of FIG. 2.
- FIG. 5 is an enlarged front view of the main part of the constant velocity joint of FIG.
- FIG. 6 is a chart showing friction coefficients, bench test results, and durability of joint boots for various grease compositions having different component ratios.
- FIG. 7 is a chart showing friction coefficients, bench test results, and durability of joint boots for various grease compositions having different component ratios.
- the grease composition for a constant velocity joint according to the present invention (hereinafter also simply referred to as a grease composition) is preferably implemented in relation to a constant velocity joint including a joint boot encapsulating the grease composition.
- a grease composition is preferably implemented in relation to a constant velocity joint including a joint boot encapsulating the grease composition.
- a tripport type constant velocity joint (sliding type constant velocity joint) as a constant velocity joint according to the present embodiment is incorporated, and a driving force transmission mechanism for transmitting the driving force of the engine force to the tire is illustrated. Shown in 1.
- this driving force transmission mechanism 1 the transmission shaft half shaft 3 and spline shafts 4a and 4b are connected in order from the differential gear 2, and the spline shafts 4a and 4b are hubs on which wheels are fitted. (Both not shown).
- the rotary shaft 5 of the half shaft 3 or the differential gear 2 and the spline shafts 4a, 4b are connected to each other via a tripport type constant velocity joint 10a, 10b, while the spline shaft 4a, 4b. And the hub are connected via barfield type constant velocity joints 12a and 12b. Therefore, the rotational driving force from the engine is the difference between the differential gear 2 and the torque.
- Report type constant velocity joints 10a and 10b, half shaft 3 or rotating shaft 5, spline shafts 4a and 4b, barfield type constant velocity joints 12a and 12b, and a hub are transmitted to tires (not shown).
- FIG. 2 shows a schematic perspective view of the main part of the tripod type constant velocity joint 10a
- FIG. 3 shows a partially cutaway side view thereof.
- This triport type constant velocity joint 10a includes an outer member 20, an inner member 22 (see FIG. 3) inserted into the outer member 20, and a bellows-like joint boot 24.
- the grease composition 26 (see FIG. 3) is enclosed in the boot 24 for use.
- the outer member 20 has a long shaft portion 28 and a cylindrical portion 30 provided at the tip portion of the shaft portion 28. Further, as shown in FIG. 4 and FIG. 5, three guide grooves 32a-3 extending along the axial direction of the outer member 20 and spaced from each other by 120 ° are formed on the inner wall surface of the cylindrical portion 30. 2c is formed. These guide grooves 32a to 32c are provided with a ceiling portion 34 provided in a direction extending along the outer peripheral surface of the cylindrical portion 30, and a sliding portion facing each other along a direction substantially orthogonal to the ceiling portion 34. As a rolling surface 36.
- the inner member 22 connected to the tip end portion of the spline shaft 4a as the second transmission shaft is inserted into the hollow portion of the cylindrical portion 30 (see FIGS. 3 and 4).
- the inner member 22 is formed with three traons 38a to 38c that bulge toward the guide grooves 32a to 32c and are spaced from each other by 120 °. ing.
- Cylindrical holders 40 are fitted on the side walls of the troons 38a to 38c, respectively.
- the inner peripheral surface of the holder 40 is formed in a straight line, while the side walls of the troons 38a to 38c are curved (see FIG. 5). Therefore, the trunnions 38a to 38c are slidable in the direction of arrow A in FIG. 5, that is, in the axial direction of the holder 40, and can be tilted with respect to the holder 40 at a predetermined angle in the direction of arrow B. . Further, the traons 38a to 38c are also rotatable in the direction of arrow C.
- the upper end portion of the holder 40 is positioned so as to protrude toward the ceiling portion 34 as compared to the smooth tip surfaces of the troons 38a to 38c, and to have a slight clearance with the ceiling portion 34. Yes.
- a roller 44 is externally fitted via a plurality of one-dollar bearings 42. It is.
- the curved side wall portion of the roller 44 comes into sliding contact with the rolling surface 36 of the guide grooves 32a to 32c, so that the roller 44 moves along the rolling surface 36 in the cylindrical portion 30 with an arrow X in FIG.
- the inner member 22 is displaced relative to the cylindrical portion 30.
- the outer member 20 and the inner member 22 configured as described above are covered with a joint boot 24 as shown in FIGS.
- This joint boot 24 also having TPC force has a bellows portion 45 in which concave portions and convex portions are alternately continued along the longitudinal direction as described above, and one end portion of the bellows portion 45 (hereinafter referred to as a large diameter side end portion). 46) corresponds to the diameter of the outer member 20, and also corresponds to the diameter of the opening diameter force S spline shaft 4a at the other end (hereinafter referred to as the small diameter side end 48).
- An annular band mounting groove 50a (see Fig. 3) recessed by a predetermined length is formed on the outer periphery of the large-diameter end 46, and the fixing band 52a mounted in the band mounting groove 50a is A part of the outer peripheral surface is crimped by a crimping jig (not shown).
- the fixing band 52a is mounted so as to surround the outer peripheral surface of the force S-outer member 20. That is, the large-diameter side end 46 is positioned and fixed to the outer member 20 by the fixing band 52a.
- annular band mounting groove 50b that is depressed by a predetermined length is formed on the outer periphery of the small-diameter side end portion 48 in the same manner as the band mounting groove 50a.
- a fixing band 52b is also mounted in the band mounting groove 50b, and the fixing band 52b is crimped by a crimping jig (not shown) so as to sandwich a part of the outer peripheral surface from the left and right directions.
- the fixing band 52b is mounted in the band mounting groove 50b so as to surround the small diameter side end portion 48, and the small diameter side end portion 48 is positioned and fixed.
- reference numerals 54a and 54b denote caulking portions that are projected by a predetermined length in the radially outward direction as the outer peripheral surfaces of the fixing bands 52a and 52b are caulked. Show.
- the grease composition 26 contains a base oil, a urea compound (a thickener), solid molybdenum dithiocarbamate (solid molybdenum dialkyldithiomolybdenum rubamate), and an alkali borate hydrate. Things are used.
- As the base oil it is possible to select various lubricating oils that are usually available, such as mineral oils and synthetic oils. Of course, a mixture of two or more of these may be used.
- mineral oils are those obtained in a lubricating oil production process performed in an oil refinery plant, that is, a solvent obtained by degassing, solvent extraction or hydrogenation of a fraction obtained by atmospheric or vacuum distillation of crude oil. Examples include those purified by one or more treatments such as decomposition, solvent dewaxing, hydrorefining, sulfuric acid washing, and clay treatment.
- the base oil has a kinematic viscosity at 100 ° C of 2 to 40 mm 2 Z seconds, preferably 3 to 20 mm 2 Z seconds. Furthermore, those having a viscosity index of 90 or more are preferred, and those having a viscosity index of 100 or more are more preferred.
- the synthetic oil having such characteristics is not particularly limited, but polyaolefin or a hydride thereof, diester, polyol ester, alkylnaphthalene, alkylbenzene, polyoxyalkylene glycol, polyphenol- Examples include ethers, dialkyl diphenyl ethers, silicone oils, and mixtures of two or more thereof.
- poly-a-olefin or hydrides thereof include polybutene, 1-octene oligomer, 1-decene oligomer or hydrides thereof, and diesters include ditridecyl glutarate, Examples include di (2-ethylhexyl) adipate, diisodecyl adipate, and di (3-ethylhexyl) sepacate.
- polyol ester examples include trimethylolpropane caprylate, trimethylolpropan pelargonate, pentaerythritolol 2-ethinorehexanoate, and pentaerythritol pelargonate.
- mineral oil has a viscosity within the above-mentioned numerical range, is relatively inexpensive and advantageous in terms of cost, and has a strong force compared with other components such as a thickener. This is particularly preferred because of good compatibility.
- urea compounds that function as a thickener include diurea compounds, triurea compounds, tetraurea compounds, polyurea compounds, urea 'urethane compounds, diuretan compounds, and two of these. The above mixture is mentioned.
- diurea compounds whose general formula is represented by the following chemical formula (2), urea 'urethane compounds, diurethane compounds, A mixture of two or more of these is preferred.
- R 1 represents a divalent organic group.
- the hydrocarbon group include a linear or branched alkylene group, a linear or branched alkene group, a cycloalkylene group, an arylene group, an alkylarene group, and an arylene alkylene group. Illustrated.
- the carbon number of R 1 is preferably 6-20, more preferably 6-15.
- organic group examples include an ethylene group, a 2,2-dimethyl-4-methylhexylene group, and organic groups represented by the following structural formulas (3) to (11).
- organic groups represented by the structural formulas (4) and (6) are particularly preferred.
- D and E are NHR 2 , —NR 3 R 4 , and —OR 5 , respectively. And may be the same as or different from each other.
- R 2 , R 5 represents a monovalent organic group, preferably an organic group having 6 to 20 carbon atoms.
- R 2 , R 3 , R 4 and R 5 may be the same as or different from each other.
- Examples of such an organic group include a linear or branched alkyl group, a linear or branched alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aryl group, and an alkyl aryl group. And arylalkyl groups.
- an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aryl group, and an alkylaryl group are particularly preferable.
- linear or branched alkyl group examples include a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, and a pentadecyl group.
- linear or branched alkenyl group examples include hexenyl group, heptenyl group, otaenyl group, nonenyl group. Decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, eicosenyl group and the like.
- cycloalkyl group examples include a cyclohexyl group
- alkyl cycloalkyl group examples include a methylcyclohexyl group, a dimethylcyclohexyl group, and an isopropyl cyclohexyl group.
- aryl group examples include a phenyl group, a naphthyl group, and the like.
- alkyl aryl group examples include a tolyl group, an ethyl furol group, a xylyl group, a propyl furol group, and a thamyl group.
- arylalkyl group examples include benzyl group, methyl benzyl group, ethyl benzyl group, etc.
- the substance represented by the chemical formula (2) is, for example, an isocyanate represented by OCN—R 1 —NCO and a compound represented by R 2 NH, R 3 R 4 NH or R 5 OH, or Two or more of these
- the mixture can be obtained by reacting at 10-200 ° C in a base oil as described above.
- R 4 or R 5 force Needless to say, it corresponds to the above.
- the ratio of the urea-based compound is preferably 2 to 30% by mass when the grease composition 26 is 100% by mass. If it is less than 2% by mass, the amount of the thickener added is small, so that the fluidity of the grease composition 26 becomes excessively large. On the other hand, if it exceeds 30% by mass, the hardness of the dull composition 26 becomes excessively large, and it becomes difficult to obtain sufficient lubrication performance.
- a more preferable ratio of the urea compound is 5 to 20% by mass.
- Solid molybdenum dithiocarbamate is a component that imparts lubricating performance to the grease composition 26, and the general formula thereof is represented by the following structural formula (12).
- R 24 , R 25 , R 26 and R 27 each represent a hydrocarbon group having 1 or more carbon atoms, and may be the same or different from each other.
- X is O or S.
- R 24 , R 25 , R 26 , and R 27 include an alkyl group, a cycloalkyl group, an alkyl cycloalkyl group, an aryl group, an alkylaryl group, and an arylalkyl group.
- alkyl group examples include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group.
- cycloalkyl groups include cyclopentyl group, ethylcyclopentyl group And a cyclohexyl group.
- alkylcycloalkyl group examples include a methylcyclopentyl group, ethyl Rucyclopentyl group, dimethylcyclopentyl group, propylcyclopentyl group, methylethylcyclopentyl group, trimethylcyclopentyl group, butylcyclopentyl group, methylpropylcyclopentyl group, trimethylcyclopentyl group, butylcyclopentyl group, methylpropylcyclopentyl group, jetyl Cyclopentyl group, Dimethylethylcyclopentyl group, Methylcyclohexyl group, Ethylcyclohexyl group, Dimethylcyclohexyl group, Propylcyclohexyl group, Methylethylcyclohexyl group, Trimethylcyclohexyl group, Butylcyclohexyl group Xyl, methylpropylcyclohexyl group, methylprop
- alkylaryl group examples include a tolyl group, a xylyl group, an ethylphenyl group, a propylphenyl group, a methylethylphenyl group, a trimethylphenyl group, a butylphenyl group, and a methylpropylphenol.
- jetylphenyl group dimethylethylphenyl group, pentylphenyl group, hexylphenol group, heptylphenyl group, octylphenol group, nonylphenyl group, decylphenyl group, undecylphenyl group , Dodecyl phenyl group, tridecyl file group, tetradecyl file group, pentadecyl file group, hexadecyl file group, heptadecyl file group, octadecyl file group, etc. Specific examples include benzyl group, phenethyl group, phenylpropyl group, and phenylbutyl group.
- the ratio of the solid molybdenum Chio carbamates, when the grease composition 26 is 100 mass 0/0, 0. 1: is preferably L0 mass%.
- the content is less than 1% by mass, improvement of wear resistance and galling resistance tends to be insufficient. Even if it exceeds 10% by mass, the effect of improving wear resistance and galling resistance is almost saturated, which is uneconomical.
- a more preferable ratio of the solid molybdenum dithiocarbamate is 0.5 to 5% by mass.
- alkali metal examples include lithium, sodium, potassium and the like. Among these, sodium and potassium are preferable.
- alkali metal borate hydrate is described, for example, in US Pat. No. 3,313,727, US Pat. No. 3,929,650, US Pat. No. 4,089,790. Can be obtained by other methods. Alternatively, it may be a sodium borate or potassium borate dispersion using neutral calcium sulfonate as a starting material. In addition, it is preferable that an ashless dispersant such as succinimide coexists in the reaction system during the carbonation reaction.
- the alkali metal borate hydrate is preferred! /,
- the average particle size is 1 ⁇ m or less, more preferably! /, And the average particle size is 0.5 ⁇ m or less.
- the ratio of the alkali metal borate hydrate is preferably 0.1 to LO mass% when the total amount of the grease composition 26 is 100 mass%.
- the wear resistance and galling resistance tend to be insufficiently improved. Even if it exceeds 10% by mass, the effect of improving wear resistance and galling resistance is almost saturated, which is uneconomical.
- a more desirable ratio of the alkali metal borate hydrate is 1.0 to 5% by mass.
- the ratio of the liquid component to the solid component is not particularly limited, but the liquid component is preferably 75 to 95% by mass and the solid component is preferably 5 to 25% by mass.
- the liquid component and the solid component in the grease composition 26 can be defined as those obtained by the following separation operation. That is, 5 g of the grease composition 26 is added to 50 g of n-hexane and stirred. Centrifuge the mixture for 10 minutes at 300 OOG using a centrifuge. While the liquid separated by this operation is transferred to another container, add 50 g of n-hexane to the residue and repeat the centrifugation under the same conditions as above. The liquid separated in this way is mixed with the liquid previously separated, and 50 g of n-hexane is added to the residue, and a third centrifugation operation is performed under the same conditions as described above. The remainder of this third operation is the solid component.
- the liquid component is defined as that obtained by mixing the liquid separated in the third operation and the previous liquid, and removing n-hexane with this liquid force evaporator or the like.
- Ru [0088]
- the grease composition 26 may further contain an extreme pressure agent, an antioxidant, an oily agent, a rust inhibitor, a viscosity index improver, a solid lubricant, and the like.
- extreme pressure agents include phosphates and phosphites.
- phosphate refers to a compound represented by the following general formula (13)
- phosphite refers to a compound represented by the following general formula (14).
- R represents an alkyl group having 1 to 24 carbon atoms, a cycloalkyl group, an alkyl cycloalkyl group, an alkyl group, an aryl group, an alkyl aryl group, an aryl alkyl group, or the like.
- R 31 and R 32 represent a hydrogen atom or an alkyl group having 1 to 24 carbon atoms, a cycloalkyl group, an alkylcycloalkyl group, an alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, or the like.
- hydrogen atoms other than R 3 °, R 31 and R 34 include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, Decyl group, dodecyl group, tetradecyl group, hexadecyl group, octadecyl group, eicosyl group, docosyl group, tetracosyl group, cyclopentyl group, cyclohexyl group, methylcyclohexyl group, ethylcyclohexyl group, dimethylcyclohexyl group, Cycloheptyl group, phenyl group, tolyl group, xylyl group, ethylphenol group, propylphenol group, butylphenol group, penty
- phosphorus-based extreme pressure additive examples include tributyl phosphate, benzyl diphenyl phosphate, ethinoresiferous-norephosphate, otatinoresphie-norephosphate, trifheninorephosphate, tricresyl phosphate, tritinorephosphate, 2-ethyl Examples include hexyl diphenyl phosphate, tributyl phosphite, and dilauryl phosphite.
- the content of sulfur contained in the liquid component is 0.6% by mass or less with respect to the total amount of the liquid component, polysulfide, sulfurized olefin, sulfide ester, sulfide mineral oil, thiazole compound, Sulfur additives such as thiadiazole compounds, zinc dithiocarbamate compounds, oil-soluble molybdenum dithiocarbamate compounds, thiophosphates, molybdenum dithiophosphate compounds, zinc dithiophosphate compounds Use a sulfur-based extreme pressure agent.
- antioxidants examples include phenolic compounds and amine compounds.
- phenolic compound examples include 2,6 di-t-butylphenol and 2,6-di-t-butyl-p-taresol.
- amine compound examples include dialkyldiphenolamine and phenol- a. -Naphthylamine, p Alkyl ferro- ⁇ -Naphthylamine.
- Examples of the oily agent include amines, higher alcohols, higher fatty acids, fatty acid esters, and amides.
- Specific examples of the amines include laurylamine, myristylamine, palmitylamine, stearylamine, oleylamine, etc.
- Specific examples of the higher alcohols include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, oleyl.
- Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid.
- Specific examples of fatty acid esters include methyl laurate and methyl myristate.
- rust inhibitor examples include partial esters of polyhydric alcohols such as metal succinic acids and sorbitan fatty acid esters, amines, phosphoric acid, and phosphates.
- viscosity index improver examples include polymetatalylate, polyisobutylene, polystyrene and the like.
- solid lubricant examples include boron nitride, graphite fluoride, polytetrafluoroethylene, molybdenum disulfide, and antimony sulfate.
- the content ratio of sulfur contained in the liquid component is set to 0.6 mass% or less with respect to the total amount of the liquid component.
- the content ratio of sulfur contained in the liquid component is more preferably 0.55% by mass or less of the liquid component.
- A is the sulfur content of the liquid component
- S is the sulfur content of the base oil
- B is the content of the base oil with respect to the total amount of the Dally composition for constant velocity joints
- C is the It represents the content of the liquid component with respect to the total amount of the grease composition for constant velocity joints, and the units of A, S, B, and C are mass%.
- the left side of the formula (1) is obtained by removing the sulfur compound derived from the base oil (mineral oil, etc.) from the sulfur-containing compound in the liquid component, in other words, the blending ratio of the oil-soluble sulfur-containing additive Represents.
- the amount of this kind of oil-soluble sulfur-containing compound is preferably 0.05 or less.
- tripart constant velocity joint 10b The structure of the remaining tripart constant velocity joint 10b is the same as that of the tripart constant velocity joint 10a, and a detailed description thereof will be omitted.
- the tripart type constant velocity joints 10a, 10b according to the present embodiment are basically configured as described above. Next, the function and effect will be described. [0108] As the automobile engine is operated, the rotational force is transmitted from the differential gear 2 to the half shaft 3 or the rotary shaft 5 and the counter members 20 and 20 of the triport type constant velocity joints 10a and 10b. The spline shafts 4a and 4b rotate in a predetermined direction.
- the rotational force of the outer member 20 is transmitted via the roller 44 and the single-dual bearing 42 that contact the guide grooves 32a to 32c, and further contacts the inner peripheral surface of the holder 40.
- the spline shafts 4a and 4b engaged with the troons 38a to 38c are rotated by being transmitted to the troons 38a to 38c through the curved side wall surfaces.
- This rotational force is further transmitted to the hub via the bar field type constant velocity joints 12a and 12b, and finally the tire rotates and the vehicle runs.
- the troons 38a to 38c are arranged in the longitudinal direction of the guide grooves 32a to 32c (in the direction indicated by the arrow X in FIGS. 3 and 4) via rollers 44 that slide along the guide grooves 32a to 32c. Move along.
- Triport type constant velocity joints 10a and 10b which are sliding type constant velocity joints, are used (see Fig. 1).
- the triport type constant velocity joint 10a, 10b joint boot 24 that operates as described above may generate frictional heat in the triport type constant velocity joint 10a, 10b during sliding, Because it is close to the gear 2, it is easy to receive heat from the differential gear 2! Therefore, it is exposed to high temperature.
- the joint boot 24 is composed of TPC having excellent heat resistance.
- the amount of sulfur compound (oil-soluble sulfur compound) contained in the liquid component in the grease composition 26 is very small, the amount of sulfur radicals generated in the grease composition 26 is also small. Therefore, the frequency with which TPC is attacked by sulfur radicals is extremely low. Therefore, TPC deterioration is remarkably suppressed.
- the amount of the oil-soluble sulfur compound in the liquid component in the grease composition 26 sealed in the joint boot 24 having TPC force can be controlled to a very small amount.
- the heat resistance of the joint boot 24 can be ensured over a long period of time.
- the life of the joint boot 24 is significantly prolonged. In other words, the joint boot 24 hardly breaks due to aging. For this reason, it is possible to avoid the leakage of the grease composition 26 enclosed in the joint boot 24.
- the troons 20a to 20c which are sliding parts of the tripart type constant velocity joints 10a and 10b, The lubricity of the roller 44 and the rolling surface 36 can be easily ensured over a long period of time. Therefore, it is possible to avoid the seizure of these troons 38a to 38c, the roller 44 and the rolling surface 36.
- the triport type constant velocity joints 10a and 10b have been described as examples of the inboard side constant velocity joints.
- TPC joint boots 24 are mounted.
- a constant velocity joint in which the grease composition 26 containing the above components is enclosed in the joint boot 24 may be adopted as the outboard side constant velocity joint.
- the hub serves as the first transmission shaft
- the spline shafts 4a and 4b serve as the second transmission shaft.
- a grease composition 26 in which each component and its ratio were set as shown in Fig. 6 was prepared and enclosed in a joint boot 24. Each is referred to as Examples 1-4.
- a grease composition in which each component and its ratio were set as shown in FIG. 7 was prepared and enclosed in a joint boot 24. Each is designated as Comparative Examples 1-6.
- diphenylmethane-4,4′-diisocyanate was dissolved by heating in the base oil shown in FIG. 6 or FIG.
- Various amines and alcohols previously heated and dissolved in base oil were added.
- various additives were blended into the obtained gel material, stirred and passed through a roll mill to obtain a grease composition.
- lithium 12-hydroxystearate was used as a thickening agent.
- various additives were blended into the obtained gel substance, and the mixture was stirred and then passed through a roll mill to obtain a grease composition.
- the measurement conditions were as follows: load 100N, amplitude 2mm, frequency 30Hz, temperature 100 ° C for 10 minutes.
- the durability of the joint boot 24 can be improved by controlling the content ratio of the oil-soluble sulfur compound contained in the liquid component, and the seizure resistance can be reduced. It is clear that galling resistance can be improved.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05809720A EP1840195B1 (en) | 2004-11-25 | 2005-11-25 | Grease composition for constant velocity joint and constant velocity joint |
CN200580040343XA CN101065472B (zh) | 2004-11-25 | 2005-11-25 | 用于等速万向节的润滑脂组合物和等速万向节 |
US11/791,537 US20080132341A1 (en) | 2004-11-25 | 2005-11-25 | Grease Composition for Constant Velocity Joint and Constant Velocity Joint |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004341279A JP4461000B2 (ja) | 2004-11-25 | 2004-11-25 | 等速ジョイント用グリース組成物及び等速ジョイント |
JP2004-341279 | 2004-11-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006057368A1 true WO2006057368A1 (ja) | 2006-06-01 |
Family
ID=36498101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/021737 WO2006057368A1 (ja) | 2004-11-25 | 2005-11-25 | 等速ジョイント用グリース組成物及び等速ジョイント |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080132341A1 (ja) |
EP (1) | EP1840195B1 (ja) |
JP (1) | JP4461000B2 (ja) |
CN (1) | CN101065472B (ja) |
WO (1) | WO2006057368A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009002376A (ja) * | 2007-06-19 | 2009-01-08 | Nsk Ltd | 転動装置 |
CN102264881B (zh) | 2008-12-26 | 2014-05-21 | 西铁城电子株式会社 | 润滑用试剂盒以及使用了该润滑用试剂盒的小型电子仪器 |
US8640815B2 (en) * | 2011-02-10 | 2014-02-04 | Honda Motor Company, Ltd. | Boot assembly |
CN104169404A (zh) * | 2012-02-24 | 2014-11-26 | 出光兴产株式会社 | 润滑脂和润滑脂的软化方法 |
JP5889678B2 (ja) * | 2012-03-14 | 2016-03-22 | Ntn株式会社 | 等速自在継手 |
US20130239710A1 (en) * | 2012-03-14 | 2013-09-19 | Gkn Driveline North America, Inc. | Fixed Joint Boot Test Fixture Assembly |
US20150045262A1 (en) * | 2012-10-12 | 2015-02-12 | Basf Se | Lubricant Compositions Comprising Trimethoxyboroxines and Amine Compounds To Improve Fluoropolymer Seal Compatibility |
CN108531264B (zh) * | 2017-03-02 | 2021-03-26 | 深圳市合诚润滑材料有限公司 | 用于汽车车门玻璃升降器的润滑脂及其制备方法 |
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- 2005-11-25 CN CN200580040343XA patent/CN101065472B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
EP1840195A1 (en) | 2007-10-03 |
EP1840195B1 (en) | 2012-07-11 |
CN101065472B (zh) | 2011-05-11 |
JP2006152037A (ja) | 2006-06-15 |
US20080132341A1 (en) | 2008-06-05 |
JP4461000B2 (ja) | 2010-05-12 |
CN101065472A (zh) | 2007-10-31 |
EP1840195A4 (en) | 2009-04-01 |
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