WO2012147781A1 - 摺動部材 - Google Patents
摺動部材 Download PDFInfo
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- WO2012147781A1 WO2012147781A1 PCT/JP2012/061072 JP2012061072W WO2012147781A1 WO 2012147781 A1 WO2012147781 A1 WO 2012147781A1 JP 2012061072 W JP2012061072 W JP 2012061072W WO 2012147781 A1 WO2012147781 A1 WO 2012147781A1
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- sliding
- sliding member
- friction force
- layer
- frictional force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1065—Grooves on a bearing surface for distributing or collecting the liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C31/00—Bearings for parts which both rotate and move linearly
- F16C31/02—Sliding-contact bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/122—Multilayer structures of sleeves, washers or liners
- F16C33/125—Details of bearing layers, i.e. the lining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/203—Multilayer structures, e.g. sleeves comprising a plastic lining
- F16C33/206—Multilayer structures, e.g. sleeves comprising a plastic lining with three layers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
- F16C2204/12—Alloys based on copper with tin as the next major constituent
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/30—Fluoropolymers
- F16C2208/32—Polytetrafluorethylene [PTFE]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2220/00—Shaping
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/02—Mechanical treatment, e.g. finishing
- F16C2223/04—Mechanical treatment, e.g. finishing by sizing, by shaping to final size by small plastic deformation, e.g. by calibrating or coining
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/30—Coating surfaces
- F16C2223/42—Coating surfaces by spraying the coating material, e.g. plasma spraying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/12—Force, load, stress, pressure
- F16C2240/18—Stress
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/54—Surface roughness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
Definitions
- the present invention relates to a sliding member used for a bearing that slidably supports a shaft.
- sliding member many sliding materials in which a Cu-Sn alloy is bonded onto a copper-plated steel sheet have been used.
- a sliding material in which a Cu-Sn alloy is bonded to a copper-plated steel sheet is used for a sliding portion using oil.
- a sliding member using a resin material is used for a sliding portion that does not use oil.
- a conventional sliding member using a resin material is obtained by forming a porous layer of Cu-Sn alloy on a copper-plated steel sheet and impregnating the porous layer with polytetrafluoroethylene (PTFE).
- PTFE polytetrafluoroethylene
- Such a sliding member impregnated with PTFE may be used for a sliding portion using oil such as a shock absorber of an automobile or the like.
- the conventional sliding member has a smooth sliding surface.
- a technique has been proposed in which a groove for storing a lubricant is provided on the sliding surface so that the lubricant can be supplied to the sliding surface (see, for example, Patent Document 1).
- a technique has been proposed in which a knurled surface is formed on a holding surface of a columnar or cylindrical object to suppress the displacement of the object (see, for example, Patent Document 2).
- JP 2002-188709 A Japanese Patent Laid-Open No. 5-106745
- a sliding member is used for a guide bush that guides a piston rod that performs a reciprocating motion by transmitting a motion of a suspension mechanism that is displaced following a change in road surface.
- the shock absorber attenuates vibrations by using the viscous resistance of liquid against external input.
- the frictional force generated in the guide bush that guides the reciprocating motion of the piston rod affects the riding comfort of an automobile or the like.
- the relationship between the static friction force acting when moving the stationary piston rod and the dynamic friction force acting when the piston rod is moving affects the riding comfort of an automobile or the like.
- the shape of the sliding surface is determined for the purpose of reducing the frictional force, and there is no one that can control the relationship between the static frictional force and the dynamic frictional force.
- An object of the present invention is to provide a sliding member capable of controlling the relationship between static frictional force and dynamic frictional force.
- the present inventors have found that the relationship between the static friction force and the dynamic friction force can be controlled by forming a convex portion on the sliding surface that suppresses the formation of an oil film in an environment where oil is used.
- the present invention is a sliding member in which an uneven surface having protrusions that suppress the formation of an oil film is formed on a sliding layer that slidably supports an object to be slid.
- a convex portion having a dotted or linear apex is formed on a cylindrical inner peripheral surface that slidably supports the object to be slid.
- lattice form with respect to the sliding direction of a to-be-slidable object extends in the diagonal direction.
- a sliding layer is formed on one surface of the metal substrate using a metal material or a resin material, or a combination of a metal material and a resin material. It is desirable that a porous layer of the alloy is formed, and the porous layer is impregnated with a resin material and fired.
- the dynamic friction force can be increased and the rate of change of the dynamic friction force with respect to the static friction force can be reduced.
- the static friction force can be increased by the shape of the uneven surface.
- FIG. 1 is a perspective view showing an example of a sliding member of the present embodiment
- FIG. 2 is a cross-sectional structure diagram showing an example of the sliding member of the present embodiment
- FIG. 3 is a sliding view of the present embodiment
- FIG. 4 is a sectional view showing an example of use of the sliding member of the present embodiment.
- the sliding member 1 of the present embodiment constitutes a cylindrical bearing, and the inner peripheral surface is a sliding layer 2 with the shaft.
- the sliding member 1 has a porous layer 4 formed of an alloy material on one surface of the metal substrate 3, and the resin material 5 impregnated in the porous layer 4 is fired.
- the sliding layer 2 is formed.
- the sliding member 1 has an uneven surface 6 on the surface of the sliding layer 2.
- the uneven surface 6 is arranged in a grid pattern with continuous vertices as shown in FIG.
- the convex portion 6a having an arbitrary shape is provided to suppress the formation of the oil film.
- the sliding member 1 guides a piston rod 7 that reciprocates in a shock absorber incorporated in an automobile or the like by transmitting the movement of a suspension mechanism that displaces following a change in the road surface.
- a suspension mechanism that displaces following a change in the road surface.
- the sliding portion of the guide bush 8 Used for the sliding portion of the guide bush 8. Since the sliding surface of the sliding member 1 with the piston rod 7 is composed of the uneven surface 6 provided with the convex portions 6a shown in FIG. In this example, line contact is used instead of surface contact in which an oil film is formed.
- the uneven surface 6 has a shape in which the convex portion 6 a extends in an oblique direction with respect to the sliding direction of the piston rod 7.
- FIG. 5 is a graph showing the relationship between static friction force and dynamic friction force.
- the vertical axis represents the frictional force (N) and the horizontal axis represents the stroke (mm).
- N frictional force
- mm stroke
- a piston rod reciprocates as a suspension follows changes in the road surface. There is a state in which the piston rod is stationary due to the reciprocating motion of the piston rod.
- the piston rod 7 shown in FIG. 4 comes into contact, and the convex portion 6a that suppresses the formation of the oil film is provided on the sliding surface that guides the reciprocating motion of the piston rod 7.
- the uneven surface 6 is formed.
- the uneven surface 6 has a larger static friction force Fs 1 than the case where the sliding surface in contact with the piston rod 7 is smooth due to the direction, number, and size of the convex portions 6a and the concave portions 6b.
- the uneven surface 6 preferably has a shape in which the convex portion 6 a extends obliquely with respect to the sliding direction of the piston rod 7. If the sliding surface with which the piston rod 7 is in contact is smooth, an oil film is formed between the piston rod 7 and the piston rod 7 by sliding, so that the dynamic friction force is reduced.
- the sliding layer 2 in which the uneven surface 6 is formed on the sliding surface is made of PTFE as the resin material 5.
- the friction coefficient ⁇ 1 of PTFE is about 0.1, whereas the friction coefficient ⁇ 2 of oil used in the shock absorber is about 0.01. In a state where the piston rod is stationary, no oil film is formed between the piston rod and the guide bush, and the static friction force Fs is affected by the friction coefficient ⁇ 1 of PTFE.
- the convex portion 6a of the uneven surface 6 formed on the sliding surface with the piston rod 7 suppresses the formation of an oil film when the piston rod 7 slides, so that the dynamic friction force Fm 1 Also, the rate of change of the dynamic friction force Fm 1 with respect to the static friction force Fs 1 is kept small by being influenced by the friction coefficient ⁇ 1 of PTFE.
- FIG. 6 is a configuration diagram showing an example of a testing machine that measures dynamic friction force and static friction force.
- a guide bush 8 is attached to the support base 11 and the load portion 12, and the load portion is interposed between the support base 11 supporting the rod 13 via the guide bush 8 via the guide bush 8.
- the load cell 14 measures the frictional force when a lateral load is applied and the rod 13 is vibrated with a vibrator (not shown).
- Table 1 shows the results of measuring the static friction force Fs and the dynamic friction force Fm. In Table 1, in the sliding member of the example, as shown in FIG.
- the sliding layer 2 is composed of a porous layer 4 made of a metal material and a resin material 5, and the resin material 5 is composed of PTFE. Further, the uneven surface 6 provided with the convex portions 6 a is formed on the sliding surface which is the surface of the sliding layer 2.
- the sliding layer is composed of a porous layer made of a metal material and a resin material, and the resin material is composed of PTFE. The sliding surface is smooth.
- the sliding member of the example in which the concavo-convex surface 6 is formed on the sliding surface has a dynamic friction force against the static friction force Fs as compared with the sliding member of the comparative example having a smooth sliding surface. It can be seen that the rate of change of Fm can be kept small. When the test is performed with the load changed, the same result is obtained regardless of the load.
- FIG. 7A and FIG. 7B are explanatory diagrams showing the relationship between the size of the projections and depressions on the uneven surface and the frictional force.
- FIG. 7A schematically shows an example in which the interval L1 between the convex portions 6a is about 0.1 (mm)
- FIG. 7B shows an example in which the interval L2 between the convex portions 6a is about 0.06 (mm). This is shown schematically.
- the sliding layer 2 is made of the resin material 5, which is PTFE in this example. For this reason, when a lateral force F is applied to the piston rod 7, the sliding layer 2 is deformed. When the piston rod 7 is stationary, the contact area when deformed by the lateral force F does not change from that when there is no load. For this reason, the static friction force Fs 1 does not change regardless of the size of the convex portions and the concave portions on the uneven surface.
- the concavo-convex surface 6 formed on the surface of the sliding layer 2 is not limited to the shape shown in FIG. 3.
- the concavo-convex surface 6 may have a shape in which the convex portion 6 a extends parallel to the sliding direction of the piston rod 7.
- a combination of concave portions having arbitrary shapes such as a quadrangular pyramid shape, a triangular pyramid shape, and a conical shape may be used.
- what combined the convex part of arbitrary shapes such as a quadrangular pyramid shape, a triangular pyramid shape, and a cone shape, may be used.
- FIG. 8 is a perspective view showing another example of the sliding surface of the sliding member of the present embodiment.
- the uneven surface 6 may be configured by combining square pyramidal convex portions 6 c that have dot-like vertices and suppress the formation of an oil film.
- a Cu—Sn alloy powder is sprayed on the copper-plated steel sheet as the metal substrate 3.
- B The copper-plated steel sheet on which the Cu—Sn alloy powder is dispersed is sintered in a sintering furnace to form a porous layer of Cu—Sn alloy on the copper-plated steel sheet.
- C After mixing PTFE dispersion as a resin main component and fillers such as molybdenum disulfide, graphite, and carbon fiber as a resin additive, the resin molded portion that was added with an organic solvent and stirred had an uneven shape. The porous layer is impregnated by pressing with an indent roller.
- the porous layer is impregnated with a resin molded product, and the concavo-convex shape that becomes the concavo-convex surface is rolled and heated to a temperature equal to or higher than the melting point of PTFE in a baking furnace, and PTFE is baked.
- a porous layer 4 is formed of Cu—Sn alloy on one surface of the metal substrate 3, and PTFE which is the resin material 5 impregnated in the porous layer 4 is baked to form an uneven surface on the surface.
- the sliding layer 2 in which 6 is formed is formed.
- the present invention is applied to a sliding member used in an environment where oil is supplied.
- SYMBOLS 1 Sliding member, 2 ... Sliding layer, 3 ... Metal base material, 4 ... Porous layer, 5 ... Resin material, 6 ... Uneven surface, 6a ... Convex
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
- Fluid-Damping Devices (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
相手材:S45C+硬質クロムメッキ、表面粗さRz0.3μm
加振器:0.001m/sec(ストローク5mm)
横荷重:10kgf、20kgf、30kgf
潤滑油:ショックアブソーバ用オイル
(a)金属基材3である銅メッキ鋼板上にCu-Sn系合金粉を散布する。
(b)Cu-Sn系合金粉が散布された銅メッキ鋼板を焼結炉で焼結して、銅メッキ鋼板上にCu-Sn系合金の多孔質層を形成する。
(c)樹脂主剤として、PTFEのディスパージョンと、樹脂添加剤として、二硫化モリブデン、黒鉛、炭素繊維等のフィラーを混合した後、有機溶剤を加え攪拌した樹脂成型部を、凹凸形状を有したインデントローラで押圧して多孔質層に含浸する。
(d)多孔質層に樹脂成型物を含浸させ、凹凸面となる凹凸形状が転造されたものを、焼成炉でPTFEの融点以上に加熱してPTFEを焼成する
Claims (4)
- 被摺動物を摺動可能に支持する摺動層の表面に、油膜の形成を抑制する凸部を有した凹凸面が形成された
ことを特徴とする摺動部材。 - 前記凹凸面は、被摺動物を摺動可能に支持する円筒形状の内周面に、点状または線状の頂点を有した前記凸部が形成される
ことを特徴とする請求項1記載の摺動部材。 - 前記凹凸面は、被摺動物の摺動方向に対して、線状の頂点が格子状に配置される前記凸部が斜め方向に延在する
ことを特徴とする請求項2記載の摺動部材。 - 金属基材の一の面に、金属材料または樹脂材料、あるいは金属材料と樹脂材料の組み合わせで前記摺動層が形成され、
前記摺動層は、前記金属基材の一の面にCu-Sn系合金の多孔質層が形成され、前記多孔質層に樹脂材料が含浸されて焼成されて構成される
ことを特徴とする請求項1、2または3記載の摺動部材。
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US14/114,155 US8727622B2 (en) | 2011-04-26 | 2012-04-25 | Sliding member |
EP12777490.9A EP2703667B1 (en) | 2011-04-26 | 2012-04-25 | Sliding member |
CN201280019461.2A CN103492738B (zh) | 2011-04-26 | 2012-04-25 | 滑动构件 |
JP2013512399A JP5354134B2 (ja) | 2011-04-26 | 2012-04-25 | 摺動部材 |
KR1020137027924A KR101440256B1 (ko) | 2011-04-26 | 2012-04-25 | 미끄럼 이동 부재 |
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US (1) | US8727622B2 (ja) |
EP (1) | EP2703667B1 (ja) |
JP (1) | JP5354134B2 (ja) |
KR (1) | KR101440256B1 (ja) |
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JP2016173113A (ja) | 2015-03-16 | 2016-09-29 | 大同メタル工業株式会社 | 車両のショックアブソーバ用の摺動部材 |
JP6006830B1 (ja) * | 2015-04-27 | 2016-10-12 | 大同メタル工業株式会社 | 摺動部材 |
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JP2022081128A (ja) * | 2020-11-19 | 2022-05-31 | 大同メタル工業株式会社 | 摺動部材 |
DE102021110359A1 (de) * | 2021-04-22 | 2022-10-27 | Miba Gleitlager Austria Gmbh | Lagerteil für ein Gleitlager, Lagerschale, Gleitlager, Maschine, Verfahren zur Herstellung eines Lagerteils für ein Gleitlager |
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EP2703667A1 (en) | 2014-03-05 |
KR101440256B1 (ko) | 2014-09-12 |
US8727622B2 (en) | 2014-05-20 |
CN103492738B (zh) | 2014-11-05 |
JP5354134B2 (ja) | 2013-11-27 |
KR20130126743A (ko) | 2013-11-20 |
JPWO2012147781A1 (ja) | 2014-07-28 |
EP2703667B1 (en) | 2016-11-23 |
EP2703667A4 (en) | 2014-12-17 |
CN103492738A (zh) | 2014-01-01 |
US20140064641A1 (en) | 2014-03-06 |
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