KR100877139B1 - Manufacturing method of crawler band, crawler band pin, crawler band bush and crawler band - Google Patents

Abstract

It improves the lubrication of the crawler band and the crawler band pins without reducing the strength of the crawler band during driving, thereby preventing squeaking or melting that occurs during driving.

One or more layers of metal members are disposed in a gap formed by a cylindrical crawler band bush 2 whose outer circumferential part or an outer circumferential part and an inner circumferential part are surface hardened, and a crawler band pin 4 disposed on the inner circumferential side of the crawler band bush 2. At least one layer of the metal member is a metal-based sliding member 8 having a structure that can be stored as lubricant and / or lubricant.

Description

Crawler Belt, Pin, Bush and Method for Manufacturing Crawler Belt}             

1 is a partial cross-sectional view of a crawler band according to one embodiment of the present invention.

2 (a) to 2 (g) show examples of the metal-based sliding member.

3 is an explanatory diagram of a lubricating oil supply method.

4 (a) and 4 (b) are explanatory views of the movement preventing method of the metal-based sliding member.

FIG.5 (a) (b) is a figure which shows the structure which made the metal type sliding member press-fit or fit in the inner peripheral surface of a crawler band bushing.

6 (a) to 6 (d) are diagrams illustrating a seal device provided in a groove processing or an end face formed on the inner circumferential surface of the crawler band bush.

7 (a) to 7 (d) show a heat treatment hardening pattern of the crawler band bush.

8 (a) to 8 (c) are explanatory views of a method of forming a metal-based sliding member.

9 is an explanatory diagram of a shock fatigue test method.

10 is a graph (1) showing the relationship between the gap (gap) of the crawler band bushing and the pin and the bush breaking strength.

11 is a graph (2) showing the relationship between the gap between the crawler band bushing and the pin and the bush breaking strength.

12 is a diagram showing the shape of a tensile test piece.

Fig. 13 (a) (b) is a diagram showing a conceptual diagram of a constant speed friction wear tester, a sliding test piece holder and sliding test conditions.

14 is a cross-sectional view showing a test piece shape provided to the sliding test.

Fig. 15 is a conceptual diagram (a) and test condition (b) of the test apparatus for the sliding test.

16 is a perspective view (a) and a cross-sectional view (b) of the crawler band.

17 (a) to 17 (d) show a heat treatment hardening pattern of the crawler band bush.

It is a schematic diagram of a melting position.

19 is a graph showing boundary lubrication wear of copper alloy and iron.

♣ Explanation of symbols for main part of drawing ♣

1 Crawler Band 2 Crawler Band Bushing

3,5 crawler band link 4 crawler band pin

6 Seals 7 Crawler Band Shoe

8 Metallic sliding member 10 Lube oil storage hole

11 Lubricant supply hole 12 Groove shape

The present invention relates to a method for manufacturing a crawler band, a crawler band pin, a crawler band bush and a crawler band used in construction of hydraulic shovels, bulldozers and the like, and civil engineering machines.

In general, the crawler band 50 of a construction machine includes a crawler band shoe 51, a pair of crawler band links 52 and 53 bolted to the crawler band shoe 51, and the crawler band 50 as shown in FIG. A crawler band bushing 54 press-fitted and fitted into the hole formed in the links 52 and 53, and a crawler band pin 55 inserted into the crawler band bushing 54 and press-fitted and fitted into the hole of the crawler band links 52 and 53, The sprockets of the drive wheel mesh with the crawler band bushing 54 pressed between the crawler band links 52 and 53, thereby rotating the crawler band 50 and running the construction machine. As shown in Fig. 16B, the seal device 56 is disposed between the end of the crawler band bush 54 and the crawler band pin 55 to prevent infiltration of soil and muddy water between the crawler band bush 54 and the crawler band pin 55. The wear life of the inner circumferential surface of the crawler band bush 54 and the outer circumferential surface of the crawler band pin 55 are improved.

In addition, as shown in FIG. 17, the crawler band bush is hardened by the carburizing quenching method or the high frequency quenching method. For example, the inner and outer circumferential surfaces are hardened by high frequency quenching, and a soft layer appears in the cross section. In the drawing written on the dry crawler band to be described later, the depth of hardening of type (a) and the outer circumferential surface is remarkably deep, and a soft layer appears in the cross section, but the width of the hardened layer from the outer circumferential surface is widened. (B) in the drawing used for the wet crawler band to be described later, the surface of the cross-section is continuously hardened by the carburizing quenching method, and the like (c) in the drawing for the wet crawler band to be described later, and After hardening the whole with quenching, high-frequency quenching from the inner circumferential surface forms a deep hardened layer on the outer circumferential surface side and the end face surface, and at the same time, tempering the inner circumferential surface. g) The softening layer and the thin inner circumferential hardening layer are formed, and the (d) type | mold etc. in the figure used also for the wet crawler band mentioned later are used. Also in the crawler band pin, the outer circumferential surface thereof is cured by the same heat treatment, and is intended to enhance the crawler band and to improve wear resistance.

Moreover, in the drive wheel and the flow wheel part which are running, between the crawler band bush 54 and the crawler band pin 55 inserted in the inner peripheral part, rotation of these crawler band bush 54 and the crawler band pin 55 in the circumferential direction generate | occur | produces, In a state in which the two slide in contact with each other, noise (unpleasant sounds) such as a ringing sound and a melting sound at the time of contact are likely to occur, and a crawler band bush and a crawler caused by the occurrence or melting of these noises are likely to occur. In order to prevent the fall of the strength of the band pin, the outer diameter of the crawler band pin is made smaller than the inner diameter of the crawler band bush.

In addition, the high speed driving bulldozer uses a wet crawler band in which lubrication oil is enclosed between the crawler band bush and the crawler band pin to suppress the occurrence of the unpleasant sound and melt between the crawler band pin and the crawler band bush. Although it is possible to prevent seizure, such a crawler band structure is expensive, and a crawler band which does not enclose lubricant is generally used as a crawler band having a low need for high-speed driving such as a hydraulic shovel. have.

It is known that the construction machine as described above, regardless of dry and wet crawler bands, the crawler band pins and crawler band bushes of the crawler band have a very large unbalanced load, and a set of crawler band pins. In the case of excessive crawler band bushing, a load of one or more times the weight of the vehicle body frequently acts, and in the case of surpassing a hard obstacle, the load may also be three times or more (3 W).

Clearance of the crawler band bush and the crawler band pin is important in the area where this load is likely to be applied, and from the point of view of strength, narrowing the clearance to support the unloading load with both the crawler band bush and the crawler band pin is important. However, as described above, when slippage occurs between the crawler band bushing and the crawler band pins, melting occurs, and conversely, for example, breakage from the inner circumferential surface of the crawler band bushing becomes a problem. As a matter of course, the larger the clearance between the crawler band bushing and the crawler band pin is, the less the problem of melting becomes, but the problem that the crawler band bushing is easily broken occurs, and the crawler band bushing is used to strengthen the crawler band bushing. The problem arises that must be made larger.

From this point of view, in most cases, the gap between the crawler band bushing and the crawler band pin is set between 0.4 and 1.2 mm in diameter, but the hydraulic shovel continuously runs along the rear surface or when the bulldozer runs at high speed. In the case where the unloading load is large, melting as shown schematically in Fig. 18 cannot be avoided, and when the gap between them is large, there is a problem that breakage of the crawler band bushing occurs frequently.

Particularly, in the contact portion caused by the unloading load, the sliding speed is very low while being high in surface pressure, and it is used as a reciprocating sliding condition, so that even in a wet crawler band encapsulating lubricating oil, melting occurs easily. Sometimes the breakage of the oil seal occurs due to overheating, and there is a problem in that the crawler band bush and the crawler band pin are damaged from the bad state of lubricating oil leakage or the melted portion.

In addition, as a countermeasure against such a melting phenomenon, the crawler band pins and the crawler band bushes are remarkably hardened by high frequency quenching or carburizing quenching. Phosphoric acid coating, carbide, nitride, cemented carbide, solid lubricant (MoS ₂ or graphite), and the like can be considered to be used. However, since it is difficult to form these surface modification layers thickly (about 10 micrometers in thickness), it is a problem that it does not lead to sufficient lifetime improvement and becomes expensive.

On the other hand, in the wet crawler band which encloses lubricating oil, an oil hole is formed in a crawler band pin, and it is possible to preferentially supply lubricating oil to the position which is easy to apply a load as shown in FIG. However, drilling the oil hole at the maximum position of the unloading load of the crawler band pins results in lowering the strength of the crawler band pins, which is undesirable from the standpoint of the high strength of the crawler band pins, and causes the problem of cutting the crawler band pins. Doing.                         

Further, in Japanese Patent Laid-Open No. 2001-88755, even when earth and sand enters between the crawler band bush and the crawler band pin, wear of the inner circumferential surface of the crawler band bush and the outer circumferential surface of the crawler band pin is minimized, and the durability and lifespan are minimized. For the purpose of improvement, 1) a crawler band provided with a plurality of foreign matter trapping grooves extending in the circumferential direction on the inner circumferential surface side of the crawler band bush, and 2) a hard resin material on the inner circumferential surface of the crawler band bush. A crawler band provided with a used resin layer and provided with a plurality of foreign matter trapping grooves extending in the axial direction apart from the resin layer in the circumferential direction. 3) A plurality of plurally extending in the circumferential direction on the inner circumferential surface side of the crawler band bush. A slider made of a hard resin material is installed in the foreign substance trapping groove, and the crawler band pin is slid by the slider. Rotatably supported, and at the same time, between the crawler band inner surface and the outer surface of the crawler band pin is at a distance in the circumferential direction, there is a crawler band fitting structure for a plurality of spaces is disclosed.

In the publication, an ultra-high molecular polyethylene resin having excellent sliding characteristics is used as the hard resin material, and grease for lubricating between the crawler band bush and the crawler band pin in the plurality of foreign matter trapping grooves or spaces. grease) is disclosed.

However, with a crawler band bush provided with a plurality of foreign matter trapping grooves so as to be spaced apart in the circumferential direction of the inner circumferential surface of the crawler band bush, the trapping grooves of the crawler band bushes of the crawler band bushing due to the above-mentioned unloading load In parallel with the advancing direction, the groove portion becomes a remarkable stress concentration source, so that the breakage strength is remarkably lowered.

In addition, in the case where a load of 1 W or more is applied to one crawler band bush as described above, in the crawler band bush provided with the hard resin layer, the pressure applied to the resin layer becomes excessive, and the resin layer has sufficient hardness and Permanent deformation cannot be prevented in that it does not have strength, and there is a risk that the resin layer protruded by the permanent deformation impairs the sealability of the seal device of the crawler band. In addition, since the wear and tear of the crawler band pin under high surface pressure are significantly reduced, the resin layer itself hardly contributes to the strength improvement of the crawler band bushing. There is a problem of lowering the strength of the bush. For this reason, it is required to design a compact crawler band without increasing the crawler band bushing as much as possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and improves the lubricity of the crawler band bushings and the crawler band pins without reducing the crawler band strength during driving, and prevents the squeaking or melting that occurs during driving. An object of the present invention is to provide a method for manufacturing a crawler band, a crawler band pin, a crawler band bush, and a crawler band. More specifically, a metal-based sliding member having good abrasion resistance is disposed in the gap formed by the crawler band bushing and the crawler band pin, and the metal-based sliding member is interposed between the crawler band bushing and the breakage stress on the inner circumferential surface of the crawler band bushing. To prevent damage to the crawler band bushing by reaction force from the crawler band pin, and to prevent the sound of ringing and melting caused by the joining between the crawler band bushing and the crawler band pin while driving, and the sprocket By absorbing the blow sound generated when engaged with the, and statically, to provide a crawler band, a crawler band pin, a crawler band bush and a crawler band excellent in high strength and wear resistance.

In order to solve the above problem, the crawler band according to the first invention,

One or more layers of metal members are disposed in a gap formed by the outer circumferential portion or the cylindrical crawler band bush whose surface circumference and the inner circumferential portion are surface hardened and the crawler band pins disposed on the inner circumferential side of the crawler band bush. It is characterized in that the metal-based sliding member having a structure capable of storing the lubricant and / or lubricant.

According to the present invention, since a metallic contact member having a structure capable of storing lubricating oil and / or lubricant is disposed in the gap formed by the crawler band bush and the crawler band pin, the crawler band bush and By narrowing the clearance of the crawler band pins, by supporting both the crawler band bushes and the crawler band pins, the strength of the crawler band higher than the conventional one is ensured, and the crawler band pins between the crawler band pins and the crawler band bushes under high loads are secured. Wear and tear can be prevented, whereby noise can be prevented.

More specifically, the gap between the crawler band bushing and the crawler band pin is usually set between 0.4 and 1.2 mm in diameter, and when the unloading load increases, the problem that melted occurrence cannot be avoided is caused. The larger the problem is, the larger the breakage of the crawler band bushing, but in the present invention, by interposing between the crawler band bushing and the crawler band pin between the crawler band bushing and the metal-based sliding member excellent in the melt resistance is prevented at the same time In addition, the deformation of the crawler band bushing on the inner circumferential surface of the unloading load is alleviated by the metal-based sliding member in contact with the inner circumferential surface, thereby preventing the crawler band bushing from being damaged.

Further, the blow sound generated when the crawler band bush and the sprocket are engaged is absorbed by the vibration of the metal-based sliding member inscribed in the crawler band bush, thereby providing a crawler band with excellent staticity. In particular, in order to improve the sound absorption, a plurality of layers of metal-based sliding members or metal-based sliding members and one or more layers of vibration damping materials are integrated into the inner circumference of the crawler band bush by a method such as press-fitting, caulking, or bonding. By doing so, it is apparent that the sound absorbing effect is further increased by vibration and minute sliding between the metal-based sliding member or between the metal-based sliding member and the vibration damping material.

In the case of integrating a plurality of metal-based sliding members in the inner circumferential portion of the crawler band bushing, the metal-based sliding member is indispensable on the side sliding with the crawler band pin, but the sliding characteristics on the inner circumferential side of the crawler band bushing do not have to have excellent sliding characteristics. It is obvious that a metal-based material having high vibration damping property can be used.

In particular, as a dry crawler band, a metal-based sliding member having a structure capable of storing lubricant such as lubricant or grease can be used to increase the effect of improving the lubricity of the metal-based sliding member and to prolong the improvement effect. Or it is clear that it is preferable that it is a structure which can store lubricants, such as grease, over a long term.

In the present invention, the metal-based sliding member is subjected to a hole, and the fact that the lubricant is retained in the hole is effective for ensuring uniform lubricity and long-term lubricity at the sliding surface, and at the same time, sound absorption of the metal-based sliding member. It is preferable to raise (2nd invention). More specifically, it is preferable to use the thing which drilled the hole of various shapes in the thin cylindrical metal sliding member, or what rolled up the plate-shaped metal-based sliding member which made the hole of various shapes. In particular, from a cost point of view, it is preferable to roll and use various plate-shaped metal members, such as punching metals, and, in view of sliding characteristics, for example, copper-based materials such as bronze and brass are preferable. In addition, as the lubricant filled in the hole, it is desirable to have a low Young's modulus and / or a porous characteristic excellent in sound absorption characteristics, and include graphite, hard wax, plastic, Containing plastics etc. are preferable.

In the present invention, it is preferable that the metal-based sliding member is made of a metal-based sintered sliding material having a ventilation hole of 5 to 30% by volume, and lubricating oil is impregnated in the ventilation hole to further improve vibration damping. (Third invention). As the metal-based sliding member having a structure capable of storing the lubricant and / or grease such as grease as described above, using a metal-based sintered sliding material in which air holes are uniformly dispersed, the lubricant is contained in the air holes, thereby providing Lubrication and sound absorption can be improved. Here, the air hole ratio of this metal-based sintered sliding material is 5 volume% or more necessary for each air hole to be open-hole and smoothly moving the lubricating oil in the sintered body. It is preferable to set it as 30 volume% or less from a viewpoint of metal type sintered compact.                     

However, in the case of using a metal-based sintered sliding material, the above-described holes of various shapes are not necessarily required, but in order to contain grease or other solid lubricants, the above-mentioned thin cylindrical porous metal sintered body is drilled and It is preferable to roll and use what used the hole of various shapes in the plate-shaped porous metal sintering sliding member.

In addition, the porous copper sintered contact material has a low Young's modulus of about 1/2 or less of the Young's modulus steel. Therefore, the contact stress between the crawler band pin and the crawler band bush during deformation due to stress under unloading is low. Is a material that is difficult to melt chemically against the crawler band bushes and crawler band pins made of steel, and plays an important role in reducing the ease of melting. Since it is most known by the material system used, it is the most suitable material in this invention.

In the third aspect of the present invention, a lubricating oil storage hole in an axial direction and a lubricating oil supply hole in a radial direction are provided in a central portion of the crawler band pin, and the lubricating oil consumed in use through these lubricating oil storage holes and a lubricating oil supply hole is used in the metal system. It is preferable to make it possible to replenish in a sintered sliding material (4th invention). Further, in the second to fourth inventions, a crawler band is formed by providing a groove in the outer circumference of the crawler band pin or the inner circumference of the crawler band bush and using the metal-based sliding member having a shape that conforms to the groove shape. It is preferable to prevent loosening of the metal-based sliding member in the axial direction from the gap formed by the crawler band bush and the crawler band pin at the time of traveling (fifth invention). Further, in order to prevent the metal-based sliding member from moving in the axial direction, it is preferable that the side of the crawler band link in which both ends of the crawler band pin are press-fitted acts as a stopper (sixth invention).

The metal-based sliding member is preferably press-fitted or fitted to the inner circumferential portion of the crawler band bush or fitted to the outer circumferential portion of the crawler band pin (seventh invention). Here, in the crawler band in which the metal-based sliding member is press-fitted or fitted into the inner circumference of the crawler band bush, it is preferable that a seal device is mounted on the inner circumferential surface near both ends thereof (eighth invention).

In each of the above inventions, the gap formed by the crawler band bushing and the crawler band pin disposed on the inner circumferential side thereof has a diameter difference of 0.4 to 2.2 mm, and the gap has a thickness of 0.1 to 1.0 mm. It is preferable that the metal-based sliding member is arranged, and the gap in diameter of all the gaps is narrowed to 1.0 mm or less (ninth invention). In this case, it is preferable that the metal-based sliding member is a copper-based sintered sliding material that has a Young's modulus lower than that of steel and is excellent in melting resistance and excellent in wear resistance and corrosion resistance (10th invention).

In addition, when the copper sliding material inserted between the crawler band bush and the crawler band pin is easily worn, the wear powder is expected to damage the dust seal and the oil seal. As can be seen from the conventional results shown in Fig. 19 as the material or the copper-based sliding material, it is clear that it is more preferable that the material is excellent in hard wear resistance of Hv130 or more.

For example, as a typical wear-resistant copper-based casting material, materials such as high-strength brass based on Cu-Zn and Al bronze based on Cu-Al are widely known.

However, in the case of using such a high-strength brass system as a sintered material which can contain as described above, Zn is very easy to evaporate during the sintering degree, and Al is also Since swelling property is abnormal at the time of sintering, it is difficult to achieve sufficient strength and hardening as the sliding material.

Therefore, in the present invention, the copper sintered sliding material is sintered by compression-forming a mixed powder for copper sintering material containing 0.3 to 5% by weight of Ti using 5 to 12% by weight of Al as an essential element. It is most preferable that it is a Cu-Al-Ti type sintering sliding material obtained by repeating the process of recompressing and re-sintering the obtained sintered compact once or more (Eleventh invention). The copper sintered sliding material contains 5 to 12% by weight of Al and 3 to 6% by weight of Sn, and at least one of Ti, Ni, Co, Si, Fe, and P is 0.5 to 5.0% by weight. It is most suitable that it is Cu-Al-Sn type sintering sliding material contained in the range of% (12th invention).

The Cu-Al-Ti-based sintered sliding material is a material that is abnormally expanded by sintering, but in the present invention, the powder compact formed under pressure is once sintered at a temperature of 600 ° C or higher, and then recompressed and recompressed to 900 ° C or more. By repeating the step of resintering at a temperature at least once or more, a high hardness sintered material of Hv130 or more is obtained while ensuring the porosity.

In the Cu-Al-Sn-Ti-based sintered sliding material, the same method as for the Cu-Al-Ti-based sintered sliding material is possible, but by adding Sn, abnormal expansion phenomenon during sintering is suppressed, and It is a material capable of densification of the sintered compact, so that it is possible to manufacture a thin cylindrical sintered compact without performing a recompression process, and to press and use it on the inner circumferential surface of the crawler band bush or the outer circumferential surface of the crawler band pin for convenient use. It was. In the case where the thin cylindrical sintered body is press-fitted into the inner circumferential surface of the crawler band bushing, it is preferable to press-fit by dividing the thin cylindrical sintered body shorter than the length of the crawler band bushing into several pieces, and to provide a space between the thin cylindrical sintered bodies. It is more preferable to be able to store lubricant such as grease in the space.

In addition, in the case where hard β-phase appears in the Cu-Al-Ti-based and Cu-Al-Sn-Ti-based sintered sliding materials, a significant improvement in the melt resistance is achieved. Hard particles or graphite suitable for or as a basic structure of the cooling material structure from (α + β) abnormality or (α + β) abnormality shown in the Cu-Al-based state diagram. It was set as the structure in which solid lubricants, such as these, disperse | distributed.

That is, in the eleventh invention or the twelfth invention, the copper sintered sliding material has a structure in which at least hard β phase and α phase and β phase coexist in the sintered structure, and the hardness of the sintered structure is Hv130. It is preferable that it is above (13th invention). Here, it is preferable that solid lubricating materials such as graphite and CaF ₂ are dispersed in the copper sintered sliding material in a range of 5% by weight or less (fourteenth invention).

(Influence of Al)

Al is a main alloy element that causes the β phase to appear, and at 12 wt% or more, there is a problem that the whole alloy is β-phased and brittle when reprocessing the small alloy, and at 5 wt% or less, β phase hardly appears. Since the hardness of Hv130 or more is hard to be achieved, the addition amount was set to 5 to 12% by weight. In addition, when molding using Al powder and copper powder, the molded body strength is very high and preferable. However, since it exhibits remarkable expandability during sintering, it is not a hard material having the above-mentioned Hv130 hardness. However, since recompression processing is performed after sintering and resintering, high hardening can be achieved. In the present invention, recompression processing and resintering are repeated one or more steps to control the processing amount during final recompression processing. The air porosity control after resintering was performed.

In addition, by adding 0.3 wt% or more of Ti in addition to Cu and Al powders, the sintered contact material is remarkably hardened, and it is very effective to obtain the desired hardness in one recompression processing and resintering process. It was made into% or more. When the content exceeds 5% by weight, the weak intermetallic compound phase is precipitated in a large amount, and the material itself is expensive, so the upper limit is added.

In addition, since remarkable hardening like Ti is considered to originate in precipitation hardenability with Al, it is preferable to add Mn, Ni, Co, etc. which show the same effect also in the range.

(Influence of Sn)

When Sn is added to Cu-Al, since Sn tends to be discharged from the sintered compact when Al is contained in a large amount, the sintered compact becomes more porous and the expandability becomes remarkable. It can be easily densified and hardened by reducing it to 7% by weight or less, or by adding it in combination with Ti and suppressing the dischargeability of Sn. In addition, since the addition of Sn lowers the sintering temperature further, stabilizes the β phase, makes it easier to precipitate, and reduces the amount of Al added for the β phase, the sintering resistance can be effectively improved. Since it is effective against melting property, in this invention, it became clear that Cu-Al-Sn-Ti type alloy sintering material is the most preferable.

In addition, since the Cu-Al-Sn-Ti alloy sintered material can be easily densified by sintering, one or more recompression and resintering processes such as the Cu-Al-Ti-based sintered material are required. It is characterized by not doing it.

(Influence of other additives such as graphite)

As the Cu-Al-Ti and Cu-Al-Sn-Ti-based sintered sliding materials, in addition to the above components, conventional copper sintering such as P, Zn, Fe, Ni, Co, Mn, Pb, Mo, W, Mg, Ag, etc. It is good to add alloying elements and / or WC, graphite, ceramics, and the like contained in the sliding material within a range without any functional problem. Particularly, graphite is coexisted with Ti to increase the bonding property with the Cu-Al-Ti and Cu-Al-Sn-Ti-based sintered materials, and is very effective not only as a solid lubricant, but also as a lubricating oil-containing place. In addition, it is effectively used for securing vent holes for a situation in which the metallic plastic flow flows due to the sliding of very high strength, and the air holes on the sliding surface are easily blocked.

In addition, the average particle diameter of the graphite dispersed particles to be added is preferably about 0.05 to 0.3 mm of the size effective for preventing the occlusion, and the addition amount is considered to be 5% by weight or less in terms of sintered material strength. It is done.

Further, in the present invention, since the function is achieved when the metal-based sliding member is inserted in the gap between the crawler band bushing and the crawler band pin, the material must be press-fitted or fitted to the inner circumferential side of the crawler band bushing, or It is not necessary to fit the outer circumferential portion of the pin, but a slight thrust force in the axial direction is applied between the crawler band pin and the crawler band bush in the crawler band during driving, and the metal-based sliding member is loosened in the axial direction. It is also conceivable that the force acts, or to facilitate the assembly of the crawler band, these materials are press-fitted or fitted to the inner circumferential side of the crawler band bushing or fitted to the outer circumference of the crawler band pin. It is more preferable that there is.

In addition, a groove is provided in the center portion of the crawler band pin outer periphery of the crawler band pin or the center of the inner periphery of the crawler band bush which is hard to be subjected to the maximum stress caused by the unloading load, and the metal-based sliding member having a shape that conforms to the groove shape is processed to provide a thrust force in the groove portion. It is preferable to prevent loosening due to, and to receive the thrust from the crawler band link side in which the crawler band pin is pressed.

Further, in the present invention, by placing a (oil) seal device such as a lip seal in the both ends of the crawler band bush and sealing on the outer circumferential surface of the crawler band pin, it is possible to increase the long-term retention of the grease or lubricant. At the same time, it was designed to improve the wear life of crawler band bushes due to infiltration of soil and muddy water from the outside.

In particular, in the conventional dry crawler band, muddy water easily penetrates into the gap between the crawler band bush and the crawler band pin when traveling in mud or muddy ground such as paddy field, and wears on the inner circumferential surface of the crawler band bush and the surface of the crawler band pin. Since the life of the crawler band tends to be shortened due to this, an expensive wet crawler band is often used to achieve a long service life of the crawler band. However, in the present invention, between the crawler band bush and the crawler band pin. The crawler band portion is formed by inserting a metal-based sliding member into a gap between the gaps and filling the gap where the mud or muddy water invades, and / or by using the metal-based sliding member as a sintered body that can contain a water-repellent lubricant. Wear on the inner circumferential surface and the surface of the crawler band pin was reduced.

In the present invention, the repair of the crawler band can be reused by replacing the inexpensive crawler band bushes or the crawler band pins instead of replacing the inexpensive metal-based sliding members.

Moreover, it is clear that the clearance gap formed by the crawler band bush and the crawler band pin arrange | positioned at the inner peripheral part is preferable to set it as the largest dimension allowable from the damage of the crawler band bush mentioned above, In this invention, these clearances The gap between the crawler band bush and the crawler band pin is provided with a metal-based sliding member having a structure capable of storing a lubricant such as a lubricant having a thickness of 0.1 to 1.0 mm or a lubricant such as a lubricant having a thickness of 0.1 to 1.0 mm. The diameter difference of the remaining gap after subtracting the thickness of the metal-based sliding member was narrowed to 1.0 (0.4) mm or less.

In addition, in this invention, a crawler band pin and a crawler band bush are prescribed | regulated by each of the following inventions, and it is prescribed about the manufacturing method of a crawler band. That is, the crawler band pin which concerns on this invention is a multilayer crawler band pin which comprises the crawler band of any one of said 1st invention-14th invention, At least the outer peripheral surface hardens to HRC50 or more, and the outer peripheral surface is at least 1 A crawler band pin comprising a metal-based sliding member having a structure capable of storing more than one layer of lubricating oil and / or lubricating material by coking, press-fitting, or bonding (15th invention).

The crawler band bushing according to the present invention is a multiple-layer crawler band bush constituting the crawler band according to any one of the first to fourteenth inventions, and at least the outer peripheral surface thereof is hardened to HRC50 or more and at least one of the inner circumferential surfaces thereof. A crawler band bush characterized in that a structure capable of storing lubricating oil and / or lubricating material of a layer or more and having a vibration damping metal-based contact member is integrated by caulking, pressing, bonding, or the like (16th invention).

In the sixteenth invention, it is preferable that the range of the distance 1/2 or more from the at least outer circumferential surface of the both end surface portions is hardened to HRC50 or more (17th invention). In addition, it is preferable that a seal device be mounted on the inner peripheral surface side of the end portion (18th invention).

On the other hand, the method of manufacturing a crawler band according to the present invention,

In the method for producing a crawler band according to any one of the first to the fourteenth inventions, at least an outer circumferential surface of the crawler band bush is hardened to HRC50 or more, or a thickness is formed from an outer circumferential surface on both end surface surfaces thereof. The range of two or more distances is hardened to HRC50 or more, and the said metal type contact member is integrated in the inner peripheral surface of this crawler band bushing by caulking, press-fitting, etc. (19th invention).                     

In the nineteenth aspect of the present invention, a hardened layer of HRC50 or more is formed on the outer circumferential surface by high-frequency heating and quenching from the outer circumferential surface of the crawler band bush, and the inner circumferential surface of the crawler band bush is soft ferrite of less than HRC50, It is preferable to consist of one or more types of structures of pearlite, bainite and tempering martensite (20th invention). Here, it is preferable to perform groove processing on the inner circumferential surface of the crawler band bush, to integrate the metal-based sliding member into the groove by coking, press-fitting, bonding, and the like, and to integrate the seal device on the inner circumferential surface of the crawler band bushing end. 21 invention).

Embodiment of the Invention

EMBODIMENT OF THE INVENTION Hereinafter, specific embodiment of the manufacturing method of a crawler band, a crawler band pin, a crawler band bush, and a crawler band by this invention is demonstrated, referring drawings.

1, the partial cross section of the crawler band which concerns on one Embodiment of this invention is shown.

In the crawler band 1 of this embodiment, both ends of the crawler band bushing 2 are pressed into the crawler band link 3, the crawler band pin 4 is inserted into the inner circumferential side of the crawler band bushing 2, and both ends of the crawler band pin 4 are inserted. The crawler band links 3 and 5 are connected by being pressed into the crawler band links 5. In addition, both ends of the crawler band bushing 2 are provided with a seal device 6 for preventing infiltration of soil from the outside, and the crawler band links 3 and 5 are bolted to the crawler band shoe 7 to form a crawler band 1. have. In the present embodiment, a metal-based sliding member 8 having a structure capable of retaining a lubricant such as lubricating oil and / or grease is disposed between the inner circumferential surface of the crawler band bush 2 and the outer circumferential surface of the crawler band pin 4. The gap between the inner circumferential surface and the outer circumferential surface of the crawler band pin 4 is to be as narrow as possible. By adopting such a structure, the load (one-sided load or impact load) applied to the outer circumferential surface of the crawler band bush 2 at the time of running the crawler band is shared with the crawler band pin 4 to increase the fatigue fatigue strength at the time of excessive driving. Sliding between the band bush 2 inner circumferential surface and the crawler band pin 4 outer circumferential surface prevents melting.

The metal-based sliding member 8 is formed by overlapping a plurality of metal-based sliding members or metal-based sliding members with one or more layers of vibration damping materials, or by joining a part of them, or by integrating the whole. The sound absorbing effect may be further enhanced by vibrations between the genuine materials and fine sliding.

As the crawler band bush 2, carbon steel, boron steel, and low alloy steel are used, and the inner and outer circumferential portions of the crawler band bush 2 are cured by high frequency quenching or carburizing quenching. In some cases, the entire thickness of the crawler band bush 2 is quenched and hardened by oil quenching or the like.

Also, for the crawler band pin 4, carbon steel, boron steel, and low alloy steel are used to increase the fracture fatigue strength and to improve the melting and abrasion resistance by contact with the crawler band bushing 2 inner circumferential surface. The surface layer is cured by surface hardening such as quenching, carburizing and quenching, carburizing and quenching, nitriding and quenching.                     

In the present embodiment, as described above, the metal-based sliding member 8 having a structure capable of holding a lubricant such as lubricating oil and / or grease is provided, so that oil-based lubrication is provided, and the crawler band bush 2 inner peripheral surface and the crawler are provided. It is a structure that can effectively prevent melting due to slipping (contact) on the outer peripheral surface of the band pin 4. In addition, various surface treatment methods such as TiN coating, immersion nitriding, phosphate coating, and Cr plating are performed on the outer circumferential surface of the crawler band 4 to improve melt resistance during welding. It is preferable.

In order to obtain a structure capable of holding a lubricant such as lubricating oil and / or grease of the metal-based sliding member 8, the first method is preferably a method in which various types of holes are drilled in the metal-based sliding member 8. This method can be easily manufactured by machining a thin cylindrical metal contact member, and a plate-shaped metal contact member formed by pressing a hole in various shapes can be rolled and used. It can be said. Moreover, since what is called a punching metal as shown to FIG.2 (a)-(g) can be used, there exists an advantage that it is excellent in market availability and can be processed by low cost.

As a second method of obtaining a structure capable of holding a lubricant such as lubricating oil and / or grease of the metal-based sliding member 8, a metal-based sintered lubricating material having 5 to 30% by volume of air holes, which have air permeability, is lubricated. The method of containing and using the oil of is preferable. This second method is more preferable than the first method in that lubricating oil can be uniformly supplied to the entire surface to be in contact. In addition, in order to hold a large amount of lubricant such as grease, it is more preferable to perform the above-described hole processing on the sliding member made of this sintered sliding material.

In the second method using the sintered sliding material, as shown in Fig. 3, a lubricating oil storage hole 10 in the axial direction and a lubricating oil supply hole 11 in the radial direction thereof are provided in the center of the crawler band pin 4 and in use. It is preferable to supply lubricating oil in the sintered sliding portion material consumed in the. According to this method, not only can the lubricating oil storage hole 10 be reduced, the hole processing ratio of the sintered sliding material can be made low, and in the conventional wet crawler band method, when the actual apparatus deteriorates, Since the lubricant sinters easily, the porous sintered sliding material has the ability to store the lubricant, so that such troubles can be prevented.

Further, the metal-based sintered sliding material is soft with respect to the hard crawler band bushes 2 and the crawler band pins 4 in contact with the metal-based sintered sliding material, and is excellent in toughness against the impact loads associated with driving and at the same time. It is more preferable to make contact with a larger area than with the case where the crawler band pin 4 is in direct contact with each other in order to alleviate the surface pressure during the contact and further suppress the melting phenomenon. To this end, the metal-based sintered sliding material is softer and has a lower Young's modulus than the crawler band bush or crawler band pin which can be made of steel. It is more preferable to use.

Since the force in the axial direction of the crawler band bushing 2 or the crawler band pin 4 is generated in the metallic sliding member (including one made of sintered sliding material) during travel, a method for preventing the movement of the metallic sliding member, For example, as shown in Fig. 4 (a), the length of the metal-based sliding member 8 is adjusted so that the end face of the metal-based sliding member 8 comes into contact with the side of the crawler band link 5 into which the crawler band pin 4 is pressed, or as shown in Fig. 4 (b). As described above, it is preferable to form a groove shape 12 in the circumferential direction of the crawler band bushing 2 inner circumference portion or the crawler band pin 4 outer circumference portion (near the center portion of the crawler band bush) and to machine the metal-based sliding member to follow the groove shape 12.

In addition, in order to improve the convenience of assembling the crawler band bushing 2 and the crawler band pin 4, as shown in Fig. 5 (a) and (b), the metallic contact member 8 is press-fitted or fitted into the inner circumference of the crawler band bushing 2. In addition, it is preferable to fit the outer peripheral portion of the crawler band pin 4.

In addition, it is preferable to provide a simple seal device 6 at both end surfaces of the crawler band bush 2 in which the metal-based sliding member 8 is press-fitted or fitted. By doing in this way, long-term storage property of lubricating materials, such as a lubricating oil and grease which hold | maintains, can improve not only the infiltration of soil and muddy water from the exterior, but also abrasion resistance of a crawler band can be improved.

Further, as described above, the metal-based sliding member 8 is inserted into a gap (gap) between the crawler band bushing 2 and the crawler band pin 4, and the crawler band pin 4 is interposed between the metal-based sliding member 8 and the load applied to the crawler band bushing 2. In addition, the structure is designed to be shared with each other to increase the fracture resistance, and to prevent melting of the plate when melted. Also, as described above, the metal-based sliding member 8 is press-fitted or fitted into the inner circumference of the crawler band bushing 2 to crawl the bushing band bushing. By providing a structure that eliminates the sliding between the 2 and the metal-based sliding member 8, it is possible to use a crawler band bush that does not necessarily require hardening hardening on the inner circumference of the crawler band bush 2. That is, it became possible to use the crawler band bush which formed the outer peripheral surface hardening layer and the cross-sectional surface hardening layer only by the high frequency quenching from the outer peripheral surface. In this way, the heat treatment cost and productivity of the conventional crawler band bush shown in Fig. 17 are remarkably superior. In addition, as shown in Fig. 6, it is possible that the inner circumferential surface processing for the groove processing formed on the inner circumferential surface of the crawler band bush 2 or the inner circumferential surface processing for the actual device provided on the end face can be facilitated with the crawler band bushing after the high frequency quenching from the outer circumferential surface. In addition, it is very preferable to secure a process density of a machine such as press fitting and fitting of the metal-based contact material. In addition, since the looseness in the crawler band bushing 2 of the metal-based sliding member 8 can be prevented by the groove of the inner peripheral part of the crawler-band bushing, the fitting force of the metal-based sliding member 8 with respect to the crawler band bushing 2 is not necessary. It can also be said that the manufacturing advantages.

As the heat treatment method for applying the various curing patterns to the crawler band bush as shown in Fig. 7, the conventional heat treatment technique as shown in Fig. 17 can be applied. Here, for example, Fig. 7A applies the technique of forming Fig. 17D, and once all hardening hardening is performed, the inner periphery of both ends is left near the inner periphery at high frequency. Although it can form also by the method of tempering by, it is economically disadvantageous because it requires double heat processing.                     

As in the present invention, when it is not necessary to form a hardened layer on the inner circumferential portion of the crawler band bush, or when a hardened layer is formed on the surface of the end face portion, the hardened pattern of type (c) in FIG. It is preferable to form a hardened hardened layer on the surface of the end face by performing moving high frequency quenching and slowing down the heating sending speed of both end faces of the crawler band bush. In addition, the (d) type in which the hardened layer is deeper than the type (c) in FIG. 7 makes the high-frequency heating conditions from the outer circumferential portion deeper, and the steel material hardens deeply in cooling after the heating. ) Is preferably formed by keeping the component appropriately.

In addition, the method of press-fitting, fitting, and disposing the metal-based sliding member on the inner circumference of the crawler band is a method of forming a cylindrical or substantially cylindrical metal-based sliding member, and various methods as shown in FIG. 8 are applied. Fig. 8A is a cylindrical rolling member that is rolled into a cylindrical shape and processed to generate a fitting force that protrudes from the end face when set on the inner circumference of the crawler band bush. b) The rolled cylindrical member is rolled into a cylindrical shape, processed and protruded and welded. Fig. 8 (c) shows that the plate-shaped sliding member is rolled and rounded to form a clean sheet. The clinch joins.

As the method of disposing the metal-based sliding member in the crawler band bushing having a groove in the inner circumference, the metal-based sliding member may be expanded.

Hereinafter, specific examples of the present invention will be described.                     

Example 1 Relationship between Crawler Band Bush and Crawler Band Pin Clearance and Fracture Strength

In this embodiment, an impact fatigue test is conducted using an impact fatigue test apparatus as shown in FIG. 9 using a crawler band bush and a crawler band pin having an outer diameter of 59.4, an inner diameter of 38.6, and a length of 138.5 mm. The effects of the crawler band bush and the crawler band pin clearance on the cracker band bush were investigated. In addition, the crawler band bushing is made of SCr440 material, and the outer and inner circumferential surfaces are quenched by high-frequency quenching so that the curing depth at the HRC45 position is about 3 mm, and the tempering treatment is performed at 180 ° C. for 3 hours. In addition, the crawler band pin was water-quenched at 850 ° C. for S45BC material and subjected to a tempering treatment at 180 ° C. for 3 hr, and its curing depth is about 4 mm.

In addition, the impact fatigue test was carried out on the inner circumferential surface of the crawler band bushing with a stress of 1.5 to 4 W based on the vehicle load W (18.5 tons in this case).

Although the result of this Example was put together in FIG. 10, the diameter difference was 1.0 mm, 0.4 mm, and 0.2 by adjusting the inner diameter of a crawler band bush and the clearance of a crawler band bush with respect to the wave strength only to a crawler band bush. In the case of mm, fatigue strengths of about 3 times, 10 times, and 20 times were found to be improved.

In Fig. 11, the inner diameter of the crawler band bush is adjusted so that the gap between the crawler band bushing and the crawler band pin is 2.0 mm in diameter difference, so that the plate of phosphor bronze (Cu9Sn) and S45C (0.9 mm thickness) is shown. Although the result of narrowing the gap to about 0.2 mm was shown, it is apparent that the breaking strength of the crawler band bushing is remarkably improved by the insertion of the metal-based sliding member.

In addition, although the metal-based sliding member inserted after the impact fatigue test tends to deform due to the load of strength, at least, the metal-based sliding member is inserted so that the gap between the crawler band bushing and the crawler band pin is 2.0 mm in diameter. It was found that within the range of this test condition in which the gap was narrowed to about 0.2 mm, there was no problem of strength. In addition, the gap between the conventional crawler band bush and the crawler band pin allows 0.4 to 1.2 mm for the gap after the metal-based sliding member is inserted. Therefore, it is preferable to suppress the gap to 1.0 mm or less in the present invention. It is clear.

In addition, a 0.9 mm-thick phosphor bronze (Cu9Sn) was also inserted into the crawler band bushing in which the inner circumferential surface of the crawler band bush was not quenched, but the high frequency quenching was performed on the outer circumferential surface. Although the results are shown in Table 11 in Fig. 11, it can be seen that the conventional crawler band bushings and the crawler band pin clearances can be used without problems in terms of strength in comparison with the results allowing 0.4 to 1.2 mm. Can be.

Example 2 Preparation and Sliding Test Results of CuAl-based Sintered Plates

The mixed powder shown in Table 1 using Al powder, Sn powder, TiH powder, Si powder, Mn powder, Ni powder, iron powder and electrolytic copper powder (Fukuda Metal CE15) of 300 mesh or less. The mold for tensile test piece of JIS shown in 12 was formed at a forming pressure of 4 ton / cm 2, and the test piece was sintered at 0.01 tor vacuum degree, 850, 900, 960 ° C. for 1 hour using a vacuum sintering furnace, and then the test piece was not broken. Rolling in a range not measured, and measuring the hardness of the re-sintered 1 hr (2S1R material) at the same temperature, and by using the constant speed friction test method, the friction coefficient of the melt melt from the surface pressure and the sliding speed rapidly increases The sliding characteristics were evaluated by measuring the threshold value (PV value) and the amount of wear (ΔW, mm) at that time.

TABLE 1

13, the conceptual diagram of a constant speed friction abrasion tester, sliding test piece holder, and sliding test conditions are shown. The sliding test piece was processed to a plate thickness of 2 mm and formed at a 5 mm angle, and then placed in the sliding test piece holder to be used for the test. The surface pressure of the sliding test was started at 100 kg / cm 2, and when there was no abnormality of the friction coefficient or abnormality of abrasion for 5 minutes, it was loaded up to 800 kg / cm 2 while increasing the pressure every 50 kg / cm 2.

The measurement results of the Vickers hardness Hv, PV value, and wear amount of each test piece are summarized in Table 1. As a result, the following became clear mainly.

1) There is little contribution of hardness up by Sn addition to Cu-Al, and it hardens as the Al concentration increases slightly, but when it becomes β single structure, it becomes difficult to roll, resulting in low hardness.

2) The effect of the addition of Ti on the hardness up of Cu-Al and Cu-Al-Sn-based sintered bodies is very remarkable, and its effect increases with increasing sintering temperature, but this is due to the promotion of Ti alloying, The action is also observed in Mn, Ni and Si.

3) As a result of evaluating the sliding characteristics by the constant friction wear test, the sliding characteristics were improved more by addition of Sn in the α, (α + β) 2, and β phases. Could know.

4) It was also found that the sliding characteristics of the (α + β) 2-phase and β-phase tissue materials were remarkably improved compared to the soft α-phase tissue materials.

5) Moreover, it became clear that abrasion resistance improved by addition of Ti, Si, Mn, and Ni.

In addition, in No. 53 to No. 55 in Table 1, the vacuum sintering time at 900 ° C. was shortened to 5 minutes and rolling and sintering were repeated twice (3S2R material). It is confirmed that the β phase in the state is finely deposited along the grain boundaries, and its influence is also shown to improve the sliding characteristics.

In addition, in this embodiment, although the maximum rolling rate is performed in the range which a crack does not generate | occur | produce in a sintered compact, the relative sintered density at that time often reaches 98 or more, Therefore, by controlling a final rolling rate, this invention It is apparent that this desired sintered plate having a relative density of 95 to 70% can be produced.

In addition, when Al powder is directly used as in the present embodiment, densification does not occur even in the case of vacuum sintering in the state of a scattering powder, and it is necessary to sinter in a state where it is once compacted.

Example 3 Metal-Based Sliding Material of Containable Structure

In the present Example, the metal-based sliding material used was examined in order to improve the melt resistance under the unloading load. In order to evaluate the sliding characteristics of the metal-based sliding material, by using the sliding test piece shown in Fig. 14, the test method shown in Fig. 15 significantly increases the friction coefficient, generates noise, or abnormal wear progresses. The melt resistance was evaluated by the surface pressure at.

In addition, although the metal-based sliding material used in the present Example is shown in Table 2, No. 1 to No. 5 are Al bronze-based sintered sliding materials, No. 6 and No. 7 are bronze solvent materials and sintering. Material. And also, for comparison, the sliding characteristics of the S45C high frequency quenching material were investigated.                     

TABLE 2

Although the results of this example are summarized in Table 2, apparently, copper-based sliding materials are preferable to iron-based sliding materials, and copper-based sintering materials that can be contained are preferable, and in particular, Al bronze-based sintering It can be seen that the material is excellent. In particular, a sintered material containing β phases of Nos. 2 to 5 is easily imagined to be excellent in melt resistance and extremely hard, and also excellent in wear resistance.

The maximum unbalance load on one crawler band bushing is estimated to be about 3.5W, but it is a very short time phenomenon, and considering that the maximum frequency load that affects the life of the crawler band is about 1W, the surface pressure applied to the sliding material is It is more preferable to endure 500 kg / cm <2>, and as shown in Table 2, it is clear that the Cu-Al type sintered sliding material excellent in surface pressure resistance is preferable. As can be seen from the present invention, it is also possible to reduce the surface pressure applied to the sliding member by adjusting the clearance after inserting the metallic sliding member into the clearance between the crawler band bush and the crawler band pin as described above. Therefore, the material of the metal-based sliding member to be inserted is not limited.

According to the present invention, it is possible to improve the lubricity of the crawler band bushing and the crawler band pins without reducing the crawler band strength at the time of running, and to prevent the squeaking or melting that occurs during the running.

A metal-based sliding member having good abrasion resistance is disposed in the gap formed by the crawler band bushing and the crawler band pin, and interposed between the metal-based sliding member and the fracture stress on the inner circumferential surface of the crawler band bushing during traveling, thereby providing Reaction forces can prevent damage to the crawler band bushings, and can also prevent ringing and melting sounds caused by the joining between the crawler band bushings and the crawler band pins when driving, and when engaging the sprockets. By absorbing the generated blow sound, it is possible to provide a crawler band, a crawler band pin, a crawler band bush and a crawler band excellent in high strength and wear resistance.

Claims (21)

At least one metal member is disposed in a gap formed by a cylindrical crawler band bush whose outer circumferential portion or an outer circumferential portion and an inner circumferential portion are surface hardened and a crawler band pin disposed on an inner circumferential side of the crawler band bush, and at least one of the metal members is disposed. The layer is a metal-based sliding member having a structure capable of storing lubricant or lubricant, The gap formed by the crawler band bushing and the crawler band pins arranged on the inner circumferential side thereof has a diameter difference of 0.4 to 2.2 mm, and a metal-based sliding member having a thickness of 0.1 to 1.0 mm is disposed in the gap. A crawler band in which a gap in diameter is narrowed to 1.0 mm or less. The method of claim 1, A crawler band in which said metal-based sliding member is subjected to hole processing, and a lubricant is held in the hole. The method of claim 1, The metal contact member is made of a metal-based sintered contact material having 5 to 30% by volume of air vents, which is impregnated with lubricating oil in the vent holes, and further improves vibration damping. The method of claim 3, wherein In the center of the crawler band pin, a lubricating oil storage hole in the axial direction and a lubricating oil supply hole in the radial direction thereof are provided, and the lubricating oil consumed in use through these lubricating oil storage holes and the lubricating oil supply hole is vented through the metal-based sintered contact material. A crawler band that can be distributed inside. The method of claim 1, The groove is formed in the outer periphery of the crawler band pin or the inner periphery of the crawler band bush, and by using the metal-based sliding member having a shape along the groove shape, the shaft is formed from the gap formed by the crawler band bush and the crawler band pin during crawler band travel. Crawler band which can prevent the metal-based sliding member to loosen in the direction. The method of claim 1, And a crawler band link side on which both ends of the crawler band pin are pressed to act as a stopper to prevent movement of the metal-based sliding member in an axial direction. The method of claim 1, The metal-based sliding member is press-fit or fitted to the inner peripheral portion of the crawler band bushing, or the crawler band is fitted to the outer peripheral portion of the crawler band pin. The method of claim 7, wherein A crawler band in which the metallic sliding member is press-fitted or fitted into the inner circumference of the crawler band bush, wherein a seal device is mounted on the inner circumferential surface near both ends thereof. delete The method of claim 1, The metal-based sliding member is a crawler band which is a copper sintered sliding material having a Young's modulus lower than that of steel and having excellent melt resistance and excellent wear resistance and corrosion resistance. The method of claim 10, The copper sintered sliding material is sintered by compression molding of a mixed powder for copper sintering materials containing 0.3 to 5% by weight of Al as an essential element, and containing 0.3 to 5% by weight of Ti, and subsequently sintering the obtained sintered body. A crawler band, which is a Cu-Al-Ti-based sintered contact material obtained by repeating a compression and resintering process one or more times. The method of claim 10, The copper sintered sliding material contains 5 to 12% by weight of Al and 3 to 6% by weight of Sn, and at least one of Ti, Ni, Co, Si, Fe, and P is 0.5 to 5.0% by weight. Crawler band which is Cu-Al-Sn type sintered contact material contained in the range. The method of claim 11, The copper sintered sliding material is composed of a hard β-phase and a structure in which α-phase and β-phase coexist in the sintered structure, and the hardness of the sintered structure is Hv130 or higher. The method of claim 13, A crawler band in which solid lubricating materials such as graphite and CaF ₂ are dispersed in a range of 5% by weight or less in the copper sintered sliding material. The multilayer crawler band pin constituting the crawler band according to any one of claims 1 to 8 or 10 to 14, wherein at least one outer peripheral surface thereof is hardened to at least HRC50 and at least one layer on the outer peripheral surface thereof. Crawler band pin, characterized in that the metal-based contact member having a structure capable of storing the above lubricant or lubricant is integrated by caulking, press-fitting, bonding. The multilayer crawler band bush constituting the crawler band according to any one of claims 1 to 8 or 10 to 14, wherein at least its outer peripheral surface is hardened to HRC50 or more, and at least one layer on its inner peripheral surface. A crawler band bush having a structure capable of storing the above lubricant oil or lubricant and integrating a metal-based sliding member having a vibration damping property by caulking, press-fitting, or bonding. The method of claim 16, A crawler band bush wherein a range of a distance of at least 1/2 of the thickness from at least the outer circumferential surface of the surface of both end faces is hardened to HRC50 or more. The method of claim 16, Crawler band bushing in which the seal device is mounted on the inner peripheral surface side of the end portion. The method for producing a crawler band according to any one of claims 1 to 8 or 10 to 14, wherein at least an outer circumferential surface of the crawler band bush is hardened to HRC50 or more, or both end surfaces thereof. The range of the distance of 1/2 or more of the thickness from the outer circumferential surface on the surface is hardened to HRC50 or more, and the metal-based contact member is integrated with the inner circumferential surface of the crawler band bushing by caulking, press-fitting, or bonding. Manufacturing method. The method of claim 19, A hardened layer of HRC50 or more is formed on the outer circumferential surface by high frequency heating and quenching from the outer circumferential surface of the crawler band bush, and the inner circumferential surface of the crawler band bush is made of Method for producing a crawler band consisting of one or more tissues. The method of claim 20, And a groove processing is performed on the inner circumferential surface of the crawler band bush, and the metal-based sliding member is integrated with the groove by caulking, press-fitting and bonding, and the seal device is integrated on the inner circumferential surface of the crawler band bushing end.

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