Abstract: A thrust bearing is equipped with a resin coating applied to the surface of a base material. Lattice-shaped discharge grooves are formed in the surface of the thrust bearing, and planer protrusions having a square shape or the like are formed at the adjacent positions thereof. Each corner part of each planer protrusion form a sliding surface that slides with respect to a counterpart member. Contaminants such as wear particles that have infiltrated between the counterpart member and the sliding surface fail into the discharge grooves and then are discharged outside of the sliding surface. The chamfering of each corner part to a rounded shape prevents the contaminants from accumulating in the discharge grooves, thus preventing the contaminants from biting into the planer protrusions.

Abstract: A scroll compressor which can be mounted in an automobile has a slide bearing resulting from baking onto a back metal a sliding layer of 5-60 wt % graphite having an average diameter of 5-50 ?m and a graphitization degree of at least 0.6, the remainder containing a polyimide resin and/or a polyamide-imide resin. The form of the graphite has: (a) an average shape factor (YAVE) as defined of 1-4 for the particles excluding the minute particles that are no greater than 0.5 times the average diameter, and there being at least 70% by number of particles having a shape factor (Y) in the range of 1-1.5; or (b) graphite particles having a particle ratio of at least 0.5 being at least 50% of the total by number.

Abstract: A shoe 5 includes a spherical portion 5A in sliding contact with a sliding surface 4a that is a hemispherical concave portion of a piston 4, an end surface portion 5B in sliding contact with a swash plate 3, and a circular cylindrical portion 5C formed between the spherical portion 5A and the end surface portion 5B. Linear oil grooves 5F are formed in the outer peripheral surface of the cylindrical portion 5C.

Abstract: A swash plate compressor 1 includes a swash plate 3 which rotates around a rotary shaft 2, a piston 4 which moves forward and backward in response to the rotation of the swash plate 3 and in which a hemispherical concave sliding surface 4a is formed, and a shoe 5 in which there are formed a flat end surface portion 12 which comes into sliding contact with the swash plate 3 and a spherical surface portion 11 which comes into sliding contact with the sliding surface 4a of the piston 4. A columnar portion 13 is formed between the spherical surface portion 11 and the end surface portion 12 in the shoe 5, and in a boundary area between the columnar portion 13 and the spherical surface portion 11, there is formed a spherical-surface-portion side flange 14 which protrudes radially outward and constitutes the spherical surface portion.

Abstract: A hemispherical shoe 4 is equipped with a sliding surface 4A which slides with a swash plate 3, and a hemispherical convex 4B. Hardening is performed by radiating a laser so that minute circles 6 may be drawn on the sliding surface 4A. Then, lapping is given to the sliding surface 4A and, finally, buffing is given thereto. Thereby, the annular swelling portions 7? and concavities 8? are formed in positions of the circles 6 and, further, lubricating oil passages 10? which include net-like concavities are formed in the sliding surface 4A. A hardening part is formed of the above-mentioned annular swelling portions 7?. The above-mentioned annular swelling portions 7? are formed so that a ratio of an area of a total of all the above-described annular swelling portions 7? occupying an area of the sliding surface 4A which is a hardening object domain may become 0.3 to 0.8. It is possible to provide a shoe 4 which is good in seizure resistance in comparison with the past.

Abstract: A thrust bearing is equipped with a resin coating applied to the surface of a base material. Lattice-shaped discharge grooves are formed in the surface of the thrust bearing, and planer protrusions having a square shape or the like are formed at the adjacent positions thereof. Each corner part of each planer protrusion form a sliding surface that slides with respect to a counterpart member. Contaminants such as wear particles that have infiltrated between the counterpart member and the sliding surface fail into the discharge grooves and then are discharged outside of the sliding surface. The chamfering of each corner part to a rounded shape prevents the contaminants from accumulating in the discharge grooves, thus preventing the contaminants from biting into the planer protrusions.

Abstract: [Problem] To exchange the roller bearing that has been used in a scroll compressor mounted in an automobile with a m slide bearing. To provide a slide bearing having a performance that is at least equivalent to that of a roller bearing. [Solution] The slide bearing results from baking onto a back metal a sliding layer of 5-60 wt % graphite having an average diameter of 5-50 ?m and a graphitization degree of at least 0.6, the remainder comprising a polyimide resin and/or a polyamide-imide resin. The form of the graphite has: (a) an average shape factor (YAVE) as defined of 1-4 for the particles excluding the minute particles that are no greater than 0.5 times the average diameter, and there being at least 70% by number of particles having a shape factor (Y) in the range of 1-1.5; or (b) graphite particles having a particle ratio of at least 0.5 being at least 50% of the total by number.

Abstract: A hemispherical shoe (sliding member) 1 has a flat sliding surface 3, which is quenched to form a quenched portion 7. A part of the quenched sliding surface is partially annealed to form an annealed portion 6. When an oil film pressure acts on the sliding surface 1, the annealed portion 6 is deformed by pressure so that the surface thereof has a concave portion 6A. In the annealed portion 6, a remaining quenched portion 8 may remain at the center part thereof. The concave portion 6A can be used as an oil reservoir or an oil flow path, so that an excellent seizure resistance can be ensured.

Abstract: A swash plate type compressor includes a swash plate rotating around a rotating shaft, pistons that advance and retreat with the rotation of the swash plate and formed with a hemispherical concave sliding surface, and shoes formed with a flat end surface part in sliding contact with the swash plate and a spherical surface part in sliding contact with the sliding surface of the piston. A cylindrical part is formed between the spherical surface part and the end surface part of the shoe, and the shoe is formed with a flange part that surrounds the boundary portion between the cylindrical part and the end surface part and is in sliding contact with the swash plate. Further, the flange part is located on the inside of an imaginary spherical surface including the sliding surface of the piston.

Abstract: A hemispherical shoe (sliding member) 1 has a flat sliding surface 3, which is quenched to form a quenched portion 7. A part of the quenched sliding surface is partially annealed to form an annealed portion 6. When an oil film pressure acts on the sliding surface 1, the annealed portion 6 is deformed by pressure so that the surface thereof has a concave portion 6A. In the annealed portion 6, a remaining quenched portion 8 may remain at the center part thereof. The concave portion 6A can be used as an oil reservoir or an oil flow path, so that an excellent seizure resistance can be ensured.

Abstract: A swash plate compressor 1 includes a swash plate 3 which rotates around a rotary shaft 2, a piston 4 which moves forward and backward in response to the rotation of the swash plate 3 and in which a hemispherical concave sliding surface 4a is formed, and a shoe 5 in which there are formed a flat end surface portion 12 which comes into sliding contact with the swash plate 3 and a spherical surface portion 11 which comes into sliding contact with the sliding surface 4a of the piston 4. A columnar portion 13 is formed between the spherical surface portion 11 and the end surface portion 12 in the shoe 5, and in a boundary area between the columnar portion 13 and the spherical surface portion 11, there is formed a spherical-surface-portion side flange 14 which protrudes radially outward and constitutes the spherical surface portion. The lubrication of the shoe is satisfactorily performed and the entry of foreign matter into the sliding parts can be prevented.

Abstract: A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and semispherical shoes 4 sliding on the swash plate 3. The semispherical shoes 4 are formed of a ferrous material and the swash plate 3 is manufactured using high-strength brass as a material. On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7? are formed by laser hardening and a lubricating oil passage 10? consisting of a reticular concave part is also formed. Thereby, a sliding device 1 having excellent seizure resistance as compared with conventional sliding devices can be provided.

Abstract: A swash plate type compressor 1 includes a swash plate 3 rotating around a rotating shaft, pistons 4 that advance and retreat with the rotation of the swash plate and each are formed with a hemispherical concave sliding surface, and shoes 5 each formed with a flat end surface part 12 being in sliding contact with the swash plate and a spherical surface part 11 being in sliding contact with the sliding surface 4a of the piston. A cylindrical part 13 is formed between the spherical surface part and the end surface part of the shoe, and the shoe is formed with a flange part 14 that surrounds the boundary portion between the cylindrical part and the end surface part and is in sliding contact with the swash plate. Further, the flange part is located on the inside of an imaginary spherical surface S including the sliding surface of the piston, and the diameter d2 of the cylindrical part is smaller than the diameter d3 of the opening of the sliding surface of the piston. The shoe can be lubricated satisfactorily.

Abstract: A shoe 5 includes a spherical portion 5A in sliding contact with a sliding surface 4a that is a hemispherical concave portion of a piston 4, an end surface portion 5B in sliding contact with a swash plate 3, and a circular cylindrical portion 5C formed between the spherical portion 5A and the end surface portion 5B. A plurality of linear oil grooves 5F are formed in the outer peripheral surface of the cylindrical portion 5C. A lubricant oil separated from a refrigerant is held in each of the oil grooves 5F of the cylindrical portion 5C of the shoe 5 when a swash plate compressor 1 is in a non-operating state. When the swash plate compressor 1 is started, the lubricant oil in the oil grooves 5F is fed to the spherical portion 5A and the end surface portion 5B which are sliding portions. The shoe 5 having excellent lubricity in comparison with a conventional case can be thereby provided.

Abstract: A sliding device 1 is constituted of a swash plate 3 including a first sliding surface 3A and a semispherical shoe 4 sliding with the swash plate 3. The swash plate 3 is constituted of a base material 3B of high strength brass containing Mn and Si, and very small granular Mn—Si compounds 6 are exposed on an inside of the base material 3B and on the first sliding surface 3A (surface of the base material 3B). The above described swash plate 3 increases in exposure amount of the Mn—Si compounds 6 exposed on the first sliding surface 3A by applying etching to the base material 3B after cutting the base material 3B. The sliding device 1 is favorable in seizure resistance and has a low manufacturing cost as compared with conventional sliding devices.

Abstract: A sliding member includes convex portions are formed by directly quenching a sliding surface of a sliding member in a line shape or a dot shape, and concave portions are formed in indirectly quenched portions adjacent to the directly quenched portions. An irregular surface is formed on the sliding surface by the directly quenched portions and the indirectly quenched portions. The directly quenched portions are formed in a lattice shape, a parallel straight line shape, a concentric circle shape or a spiral shape. With the irregular surface on the sliding surface by the directly quenched portions and the indirectly quenched portions, the seizure resistance can be improved.

Abstract: A sliding surface 4A of a shoe 4 undergoes laser radiation in a shape of a large number of parallel lines to form a large number of swollen portions 6 and concave portions 7 in adjacent positions thereof. The swollen portions 6 and the inner side thereof become direct-hardened portions 11 with a high hardness and the concave portions 7 and the inner side thereof become double-hardened portions 12, which are lower in hardness than the swollen portions 6. After the laser hardening, the sliding surface 4A undergoes lapping up to a position of an imaginary line 15 to delete the relief and form a flat and smooth plane. Thereafter the sliding surface 4A undergoes buffing so that portions with a low hardness are chipped off more than portions with a high hardness to form a large number of minute irregularities on the sliding surface 4A.

Abstract: There is provided a semispherical shoe which is formed into a substantially semispherical shape by a convex semispherical surface 2 and a flat end surface 3, the semispherical surface having a slidably contacting surface 6 that is in slidable contact with a semispherical concave portion and non slidably contacting surfaces 7 and 8 that are not in slidable contact with the concave portion. When the semispherical shoe is manufactured, first, after a semispherical material having a semispherical surface following the concave portion has been formed, the surface of the portion that is to be the slidably contacting surface on the semispherical surface is quenched to expand the quenched portion from the original surface of the semispherical surface, whereby the sliding surface is formed on the surface of the expanded portion, and the other portions are made the non slidably contacting portions.

Abstract: A sliding surface 4A of a shoe 4 undergoes laser radiation in a shape of a large number of parallel lines to form a large number of swollen portions 6 and to form concave portions 7 in adjacent positions thereof. The swollen portions 6 and the inner side thereof become direct hardening portions 11 with high hardness and the concave portions 7 and the inner side thereof become double hardening portions 12, which are lower in hardness than the swollen portions 6. After the laser hardening, the sliding surface 4A undergoes wrapping up to a position of an imaginary line 15 to delete relief to form a flat and smooth plane. Thereafter the sliding surface 4A undergoes buffing. Thereby, portions with low hardness are chipped off more largely than portions with high hardness to form a large number of minute irregularities on the sliding surface 4A (see FIG. 6). A large number of minute irregularities is formed uniformly on the sliding surface 4A of the shoe 4 and lubrication oil will be introduced thereinto.

Abstract: A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and a plurality of semispherical shoes 4 sliding on the swash plate 3. The semispherical shoe 4 is formed of a ferrous material, and the swash plate 3 is manufactured using high-strength brass as a material. On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7? are formed by laser hardening, and a lubricating oil passage 10? consisting of a reticular concave part is also formed. Thereby, the sliding device 1 having excellent seizure resistance as compared with the conventional sliding device can be provided.