WO2005019664A1 - すべり軸受組立体及びすべり軸受 - Google Patents
すべり軸受組立体及びすべり軸受 Download PDFInfo
- Publication number
- WO2005019664A1 WO2005019664A1 PCT/JP2004/012065 JP2004012065W WO2005019664A1 WO 2005019664 A1 WO2005019664 A1 WO 2005019664A1 JP 2004012065 W JP2004012065 W JP 2004012065W WO 2005019664 A1 WO2005019664 A1 WO 2005019664A1
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- WO
- WIPO (PCT)
- Prior art keywords
- bush
- lubricating oil
- fine particles
- pores
- sliding
- Prior art date
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Classifications
-
- 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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/006—Pivot joint assemblies
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
-
- 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
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/045—Pivotal connections with at least a pair of arms pivoting relatively to at least one other arm, all arms being mounted on one pin
-
- 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
-
- 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
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
-
- 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
- F16C33/109—Lubricant compositions or properties, e.g. viscosity
-
- 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
-
- 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
- F16C2350/00—Machines or articles related to building
- F16C2350/26—Excavators
Definitions
- the present invention relates to a slide bearing assembly and a slide bearing, and more particularly, to a slide bearing assembly capable of extending a slidable period without lubrication even in an environment of extremely low speed and minute swing. It relates to a three-dimensional and sliding bearing.
- members constituting the driving mechanism are relatively rotatably or swingably connected and driven by a cylinder or other actuator. It is configured as follows. For example, in a working device of a hydraulic excavator, an arm is connected to the tip of a boom and a packet is connected to the tip of the arm. During a digging operation, an arm cylinder and a bucket cylinder are driven, and the arm is connected to the boom. The earth or the like is excavated by rotating or swinging the bucket centering on the connecting portion with the arm and the bucket centering on the connecting portion with the arm. These connecting portions are connected via a slide bearing assembly including a shaft and a bush.
- Patent Document 1 Japanese Patent No. 2832800
- the bush is generated by frictional heat generated by sliding between the shaft and the bush. Since the lubricating oil impregnated into the shaft is oozed out, the lubricating effect cannot be sufficiently exerted when the shaft and the bush slide at a very low speed or slide at very low speed, for example, when the shaft and the bush slide only a few mm. There was a possibility that local wear 'damage such as "galling" on the shaft surface or the inner peripheral surface of the bush and the accompanying noise may occur due to the surface pressure.
- the present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to extend a period in which lubrication can be performed without lubrication even in an environment of extremely low speed and minute swing.
- An object of the present invention is to provide a plain bearing assembly and a plain bearing.
- the present invention has at least a shaft and a bush
- a solid lubricating fine particles 2.0 30 wt% containing lubricating oil is impregnated to the shaft and the bushing is a Chino used in sliding speed in the range of 6KgfZmm 2 or more surface pressure and 2-5CmZ seconds.
- the frictional heat causes the lubricating oil impregnated in the pores of the bush to appear on the inner peripheral surface of the bush, thereby forming a thin oil film.
- the solid lubricating fine particles contained in the lubricating oil also appear on the inner peripheral surface of the bush.
- the solid lubricating fine particles enter the sliding surface between the bush and the shaft together with the lubricating oil, so that the fine layer constituting the solid lubricating fine particles slides in the layer direction, thereby exhibiting a lubricating effect.
- the lubricating oil forming an oil film on the sliding surface is sucked into the many pores of the bush together with the solid lubricating fine particles by capillary action. Since the lubricating oil impregnated in the pores of the bush has extremely low fluidity, even if the shaft and the bush repeatedly slide, the lubricating oil runs off very little. As a result, the lubricating oil containing the solid lubricating fine particles is stably supplied over a long period of time.
- the sliding bearing assembly of the present invention as described above, excellent tribological characteristics are obtained due to the lubricating effect of the solid lubricating fine particles containing the lubricating oil.
- the content By setting the content within the range of 2.0 to 30 wt%, an excellent effect of improving load-bearing characteristics can be obtained. Therefore, wear and damage of the shaft surface and the inner peripheral surface of the bush due to the above-mentioned galling and abnormal noise due to the above-mentioned galling can be suppressed even in an environment of extremely low speed and minute rocking, and the period during which sliding is possible without lubrication is possible. Can be extended.
- the present invention relates to a plain bearing assembly having at least a shaft and a bush, wherein the bush is made of a porous sintered material having a large number of pores. , said bush being lubricating oil impregnated containing 3.0- 5.
- OWT% of solid lubricant particles composed of graphite, the shaft and the bush is 6KgfZmm 2 or more ranges of surface pressure and 2-5CmZ seconds It shall be used at the sliding speed within.
- the viscosity of the lubricating oil containing the solid lubricating fine particles is in the range of 56 to 1500 cSt (at 25.5 ° C).
- the viscosity of the lubricating oil containing the solid lubricating fine particles is within 1500 cSt, the above-mentioned situation can be prevented, and the long-term stable sliding characteristics can be maintained. S can.
- the bush is made of a composite sintered alloy having a porosity of 5-30 vo 1%, and the plurality of pores are communicated with each other.
- Shall be surface-modified by at least one of carburizing, nitriding and immersion nitriding treatment methods.
- the wear resistance of the bush can be improved.
- the solid lubricating fine particles are -The pores should not be obstructed and be large.
- the shaft is subjected to at least one of carburizing, induction quenching, laser quenching, and nitriding, and then is surface-modified by a chemical conversion or sulfurizing treatment method. It must be processed.
- the wear resistance of the shaft can be improved, and the surface of the shaft is carburized by using an extreme pressure imparting substance such as Zn (zinc), Mn (manganese), or S (sulfur) to increase the frequency.
- an extreme pressure imparting substance such as Zn (zinc), Mn (manganese), or S (sulfur) to increase the frequency.
- the surface is modified by chemical conversion or sulfurization to improve the "wetting" of the lubricating oil impregnated in the bush, thereby improving the lubrication effect and tribology.
- the characteristics can be further improved.
- the plain bearing of the present invention is made of a porous sintered material having a large number of pores, and at least one of MoS, WS, and hexagonal BN.
- lubricating oil is impregnated containing force constituted solid lubricant particles 2.0- 30 wt%, to those used in the sliding speed in the range of 6K gf / mm 2 or more surface pressure and 2-5 cm / sec You.
- the sliding bearing of the present invention is a porous sintered material having a large number of pores. . the lubricating oil impregnated containing OWT%, and those used in the sliding speed of 6 kgf / mm 2 or more surface pressure and 2-5 cm / sec within range.
- the viscosity of the lubricating oil containing the solid lubricating fine particles is in the range of 56 cSt to 1500 cSt (at 25.5 ° C).
- (10) in the above (7) or (8), preferably, it is composed of a composite sintered metal having a porosity of 5 to 30 vol%, and the plurality of pores are communicated with each other to form carburized, nitrided and infiltrated flows. It is assumed that the surface has been modified by at least one of the nitriding methods.
- the solid lubricating fine particles have a diameter that does not block the pores.
- FIG. 1 is a side view showing the entire structure of a hydraulic shovel provided with a sliding bearing assembly according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing an internal structure of a sliding bearing assembly according to an embodiment of the present invention.
- FIG. 3 is a view showing load-bearing characteristics of a bush when solid lubricating fine particles are contained at various concentrations in lubricating oil used in an embodiment of the plain bearing assembly of the present invention.
- FIG. 4 is a diagram showing the relationship between the MoS content and the viscosity of the MoS-containing lubricating oil in one embodiment of the plain bearing assembly of the present invention.
- FIG. 5 is a schematic partial enlarged cross-sectional view of a sliding surface between a bush and a shaft, which constitutes an embodiment of the sliding bearing assembly of the present invention.
- FIG. 6 is a view showing load-bearing characteristics of a bush when solid lubricating fine particles are contained at various concentrations in lubricating oil used in another embodiment of the plain bearing assembly of the present invention. Explanation of symbols
- FIGS. one embodiment of the sliding bearing assembly and the sliding bearing of the present invention is shown in FIGS. This will be described with reference to FIG.
- FIG. 1 is a side view showing the entire structure of a hydraulic shovel provided with a sliding bearing assembly according to an embodiment of the present invention.
- reference numeral 1 denotes a traveling unit
- 2 denotes a revolving unit mounted on the traveling unit 1 so as to be revolvable
- 3 denotes a driver's cab provided on one side (left side in FIG. 1) of the revolving unit 2.
- Reference numeral 4 denotes an engine room provided on the other side (the right side in FIG. 1) on the revolving superstructure 2
- reference numeral 5 denotes a working device provided on the driving cab 3 side on the revolving superstructure 2.
- Reference numeral 6 denotes a boom provided on the revolving unit 2 so as to be able to move up and down
- 7 denotes a boom hydraulic cylinder for driving the boom 6
- 8 denotes an arm rotatably provided at the tip of the boom 6
- 9 denotes a boom.
- the arm 8 is a hydraulic cylinder for driving the arm
- 10 is a bucket rotatably provided at the end of the arm 8
- 11 is the packet hydraulic cylinder for driving the packet 10
- the working device 5 is It consists of a boom 6, an arm 8, a packet 10, and hydraulic cylinders 7, 9, and 11.
- each slide bearing assembly used in the working device 5 has a different size and shape depending on the installation location, but here, the sliding bearing assembly used in the working device 5 is They are all the same and are collectively referred to as the plain bearing assembly 12.
- FIG. 2 is a sectional view showing the internal structure of the plain bearing assembly 12.
- 15 is a boss
- 16 is a bush fitted and fixed inside the boss 15 by shrink fit such as shrink fit or cooling fit
- 17 and 17 are arranged on both side surfaces of the bush 16.
- Dust seals press-fitted on both sides of the bush 16 in the boss 15 so that the oil-shielding members 17 and 17 abut against the bush 16, and 19 and 19 are the boss 15 Brackets to be placed on both sides of the tsukuda J, 20, 20 are shims provided in the gaps between these brackets 19, 19 and the boss 15 respectively, 21 and 21 are outside the gaps between the brackets 19, 19 and the boss 15 O-rings mounted on the circumference.
- Reference numeral 22 denotes a shaft which penetrates through the brackets 19, 19 and the bush 16 and is slidable with the bush 16, and reference numeral 23 denotes the shaft 22 and the bracket 1
- the shaft 22 and the bracket 19 cannot rotate with the rotation locking bolt 23 provided through the rotation locking bolt 23.
- the bush 16 is made of, for example, a porous composite sintered alloy formed of copper powder and iron powder, and has a large number of pores 25 communicating with each other for impregnating a lubricating oil 24 (see Fig. 5 described later). (See Figure 5 below).
- the porosity of the bush 16 is, for example, about 20 vol%.
- the porosity of this bush is preferably about 5-30 vol%. That is, when the porosity is less than 5 vol%, the amount of lubricating oil impregnated becomes insufficient (as a result, the amount of solid lubricating fine particles impregnated into the pores described below becomes insufficient), and the lubrication-free bearing is used. This is because it may not function sufficiently.
- the porosity is larger than 30 vol%, the mechanical strength of the bush 16 itself decreases.
- the composite sintered alloy constituting the bush 16 may be formed from a material other than copper powder and iron powder.
- such a bush 16 is impregnated with a lubricating oil 24 having a viscosity of, for example, 460 cSt (at 25.5 ° C.). It is preferable that the viscosity of the lubricating oil to be impregnated (more precisely, the viscosity in a state where solid lubricating fine particles described later are contained) is in the range of 56 to 1500 cSt (at 25.5 ° C.).
- the viscosity of the lubricating oil decreases, so that the lubricating oil that has oozed out of the sliding portion due to frictional heat returns to the pores of the bush 16 again, which makes it difficult for the capillary phenomenon to occur.
- the lubricating oil 24 any commercially available lubricating oil such as mineral oil or synthetic oil can be used, and the composition itself is particularly limited as long as the viscosity is within the above range. Not something. However, grease is excluded because it cannot be impregnated into the bush 16 because it contains fibers.
- At least one of MoS mobdenum disulfide
- WS tungsten disulfide
- hexagonal BN boron nitride
- the lubricating oil 24 impregnated in the bush 16 is used as the lubricating oil 24 impregnated in the bush 16.
- 20% of the solid lubricating fine particles 26 which also constitute the above force are contained. Since these solid lubricating fine particles 26 have a layered structure, they exhibit an excellent lubricating effect by sliding in the layer direction.
- These solid lubricant particles 2 The content of 6 is preferably in the range of 2.0-30 wt%. The reason for this will be described below with reference to FIGS.
- FIG. 3 shows the load-bearing characteristics of the bush 16 when the solid lubricating fine particles (here, MoS) are contained in the lubricating oil (here, the lubricating oil having a viscosity of 460 cSt) at various concentrations (% by weight).
- MoS solid lubricating fine particles
- lubricating oil here, the lubricating oil having a viscosity of 460 cSt
- the lower limit of the MoS content is preferably set to 2.0% at which the effect of improving the load-bearing characteristics can be obtained.
- Fig. 4 is a diagram showing the relationship between the MoS content and the viscosity of a lubricating oil containing this MoS.
- the viscosity of the lubricating oil containing MoS is set to 30% so that the viscosity becomes about 1500 cSt or less.
- the MoS content of the lubricating oil 24 be in the range of 2.0 to 30 wt%.
- the particle diameter of the solid lubricating fine particles (MoS, WS, and hexagonal BN) 26 contained in the lubricating oil 24 does not block the pores 25 so that the sliding parts can smoothly enter and exit from the pores 25 of the bush 16. It is sufficiently small (for example, about 0.1 lz m-lOO zm).
- the lubricating oil 24 containing the solid lubricating fine particles 26 as described above is usually as follows.
- the solid lubricating fine particles 26 and the lubricating oil 24 are sufficiently stirred to uniformly disperse the solid lubricating fine particles 26 in the lubricating oil 24, and then the lubricating oil 24 is heated to a lower viscosity to obtain a liquid. Let it form. Then, the bush 16 is immersed in the lubricating oil 24 containing the solid lubricating fine particles 26, and is left still in a vacuum atmosphere.
- the air in the pores 25 of the bush 16 is sucked out, and the lubricating oil 24 containing the solid lubricating fine particles 26 is sucked into the pores 25 instead.
- the bush 16 is taken out into the air and allowed to cool to room temperature, and the lubricating oil 24 containing the solid lubricating fine particles 26 becomes in the pores 25 of the bush 16. Returns to the original viscosity again and loses fluidity.
- the lubricating oil 24 containing the solid lubricating fine particles 26 can be retained in the pores 25 of the bush 16.
- the heating temperature of the lubricating oil 24 containing the solid lubricating fine particles 26 is not particularly limited, but it is necessary to change the heating temperature according to the viscosity of the lubricating oil 24 used, but the lubricating oil 24 is liquefied. It is enough to heat up. However, when using resin materials such as polyethylene, polyimide, polyacetal, and PTFE (polytetrafluoroethylene) for the solid lubricating fine particles 26, the heating temperature must be lower than the heat resistance temperature of the resin. is there.
- the immersion time and the degree of vacuum of the bush 16 in the lubricating oil 24 containing the solid lubricating fine particles 26 are not particularly limited, but are changed according to the viscosity of the lubricating oil 24 used. It is necessary to soak until the pores 25 of the bush 16 are saturated with the lubricating oil 24 containing the solid lubricating fine particles 26. If As an example, viscosity heats the solid lubricant particles containing a lubricant 460cSt to 60 ° C-80 ° about C, immersing the bushings in the lubricating oil in the vacuum of 2 X 10- 2 mmHg, bushing It takes about 1 hour for the pores to become saturated with the lubricating oil containing solid lubricating fine particles.
- the shaft 22 is made of a steel material, and its surface (outer peripheral surface) is subjected to at least one of carburizing, induction hardening, laser hardening, and nitriding, followed by chemical conversion (eg, zinc phosphate, phosphoric acid). Manganese, etc.) or by a sulfur treatment method.
- carburizing e.g., zinc phosphate, phosphoric acid.
- nitriding eg, zinc phosphate, phosphoric acid.
- sulfur treatment method e.g, zinc phosphate, phosphoric acid.
- Zn zinc phosphate, phosphoric acid
- Mn manganese, etc.
- S sulfur
- the sliding surface of bush 16 with shaft 22 (that is, the inner peripheral surface) is also subjected to a surface modification treatment by a carburizing, quenching, nitriding, sulfurizing treatment method or the like similarly to the surface of shaft 22. You can do it.
- the wear resistance of the bush 16 can be improved by forming a carburized hard layer having a thickness of about lmm-3 mm (preferably 2 mm) on the sliding surface of the bush 16.
- the bush 16 constitutes the sliding bearing according to claims 7 to 14 of the claims, and also constitutes the bearing for a front part of an excavating machine according to claim 13.
- FIG. 5 is a schematic partial enlarged cross-sectional view of a sliding surface between the bush 16 and the shaft 22.
- the lubricating oil 24 forming the oil film M on the sliding surface is sucked into the many pores 25 of the bush 16 together with the solid lubricating fine particles 26 by capillary action. Is done. Since the fluidity of the lubricating oil 24 impregnated in the pores 5 is extremely low, even if the shaft 22 and the bush 16 repeatedly slide, the loss of the lubricating oil 24 and the solid lubricating fine particles 26 is extremely small. ,. As a result, the period during which the lubricating oil 24 containing the solid lubricating fine particles 26 is stably supplied can be made relatively long (for example, about 5 years).
- the shaft and the bush slide only by a few mm so that the micro-oscillation is small.
- the frictional heat generated is very small, so that a sufficient lubricating effect cannot be exerted, and a local surface pressure is generated and the surface of the shaft 22 or the inner peripheral surface of the bush 16
- local wear and damage such as "galling" and abnormal noise accompanying this would occur.
- the sliding bearing assembly 12 of the present embodiment as described above, excellent tribological characteristics are obtained by the lubricating effect of the solid lubricating fine particles 26 contained in the lubricating oil 24, and
- the content of the solid lubricating fine particles 26 in the range of 2.0 to 30 wt%, an excellent effect of improving the load bearing characteristics can be obtained as shown in FIG. Therefore, even in an environment of extremely low speed and minute swing, wear and damage of the surface of the shaft 22 and the inner peripheral surface of the bush 16 due to the above-described force and the like and abnormal noise due thereto can be suppressed.
- the slidable period can be extended.
- the slide bearing assembly 12 can sufficiently exhibit a lubricating effect.
- Lubricating oil 24 contains 20% of solid lubricating fine particles 26 composed of at least one of 2 and hexagonal BN, while lubricating solid lubricating fine particles 26 'composed of graphite Oil 24 contains, for example, 3.0%.
- the lubricating oil 24 contains, for example, 3.0% of the solid lubricating fine particles 26 'composed of graphite.
- the content is preferably in the range of 3.0 to 5. Owt%. The reason for this will be described below with reference to FIG.
- FIG. 6 shows solid lubricating fine particles (here, graphite (carbon) force, etc.) at various concentrations (% by weight) in a lubricating oil (here, a lubricating oil with a viscosity of 460 cSt).
- FIG. 7 is a diagram showing the load-bearing characteristics of the bush 16 when the above-mentioned condition is included.
- the particle size of the solid lubricating fine particles 26 'to be contained in the lubricating oil 24 is set so that the solid lubricating particles 26' can smoothly enter and exit the sliding portion from the pores 25 of the bush 16 as in the above-described embodiment. It is small enough not to block 25 (for example, about 0.1 ⁇ m 100 am).
- the sliding bearing assembly 12 since the lubricating effect of the solid lubricating fine particles 26 ′ has low temperature dependence, even when the excavator is used in cold regions, for example, the sliding bearing assembly 12 is lubricated. The effect can be fully exhibited.
- the slide bearing assemblies 12 of the two embodiments described above are used under conditions of a high surface pressure of 6 kgf / mm 2 or more and a high PV value of 1 ⁇ Okgf 'm / mm 2 ' s or more. It is suitable for Therefore, the bearing is not limited to the bearing for the front part of the excavating machine such as the bearing assembly 12 used for the working device 5 of the hydraulic excavator described above.
- the bearing for the arm of the crane, the roller gate bearing of the dam sluice, the press die Applicable to bearings used under low-speed and high surface pressure conditions, such as vertical slide cam bearings, hydroelectric turbine turbine inner blade bearings, and offshore crane unloader pin bearings.
- the bush made of a porous sintered material includes MoS, WS,
- a lubricating oil containing 2.0-30 wt% of solid lubricating fine particles composed of at least one of 22 and hexagonal BN is impregnated.
- a bush made of a porous sintered material is impregnated with lubricating oil containing 3.0 to 5. Owt% of solid lubricating fine particles composed of graphite.
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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)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005513323A JPWO2005019664A1 (ja) | 2003-08-25 | 2004-08-23 | すべり軸受組立体及びすべり軸受 |
US10/529,915 US20060093246A1 (en) | 2003-08-25 | 2004-08-23 | Sliding bearing assembly and sliding bearing |
EP04772026A EP1659303A1 (en) | 2003-08-25 | 2004-08-23 | Sliding bearing assembly and sliding bearing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-300005 | 2003-08-25 | ||
JP2003300005 | 2003-08-25 |
Publications (1)
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WO2005019664A1 true WO2005019664A1 (ja) | 2005-03-03 |
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ID=34213795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/012065 WO2005019664A1 (ja) | 2003-08-25 | 2004-08-23 | すべり軸受組立体及びすべり軸受 |
Country Status (6)
Country | Link |
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US (1) | US20060093246A1 (ja) |
EP (1) | EP1659303A1 (ja) |
JP (1) | JPWO2005019664A1 (ja) |
KR (1) | KR20050065566A (ja) |
CN (1) | CN100427776C (ja) |
WO (1) | WO2005019664A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007225077A (ja) * | 2006-02-27 | 2007-09-06 | Hitachi Constr Mach Co Ltd | すべり軸受及びその製造方法 |
JP2008057626A (ja) * | 2006-08-30 | 2008-03-13 | Hitachi Constr Mach Co Ltd | 軸受装置用のブッシュ |
CN101974918A (zh) * | 2010-10-15 | 2011-02-16 | 三一重机有限公司 | 一种用于挖掘机动臂的自润滑轴承 |
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- 2004-08-23 US US10/529,915 patent/US20060093246A1/en not_active Abandoned
- 2004-08-23 WO PCT/JP2004/012065 patent/WO2005019664A1/ja active Application Filing
- 2004-08-23 JP JP2005513323A patent/JPWO2005019664A1/ja active Pending
- 2004-08-23 CN CNB2004800012802A patent/CN100427776C/zh not_active Expired - Fee Related
- 2004-08-23 EP EP04772026A patent/EP1659303A1/en not_active Withdrawn
- 2004-08-23 KR KR1020057005457A patent/KR20050065566A/ko not_active Application Discontinuation
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JP2007225077A (ja) * | 2006-02-27 | 2007-09-06 | Hitachi Constr Mach Co Ltd | すべり軸受及びその製造方法 |
JP4619302B2 (ja) * | 2006-02-27 | 2011-01-26 | 日立建機株式会社 | すべり軸受及びその製造方法 |
JP2008057626A (ja) * | 2006-08-30 | 2008-03-13 | Hitachi Constr Mach Co Ltd | 軸受装置用のブッシュ |
CN101974918A (zh) * | 2010-10-15 | 2011-02-16 | 三一重机有限公司 | 一种用于挖掘机动臂的自润滑轴承 |
Also Published As
Publication number | Publication date |
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CN1705829A (zh) | 2005-12-07 |
US20060093246A1 (en) | 2006-05-04 |
KR20050065566A (ko) | 2005-06-29 |
CN100427776C (zh) | 2008-10-22 |
EP1659303A1 (en) | 2006-05-24 |
JPWO2005019664A1 (ja) | 2006-10-19 |
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