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61. 发明专利

JP2000274451A FE-BASED SINTERED ALLOY SYNCHRONIZER RING 失效
公开(公告)号：JP2000274451A
公开(公告)日：2000-10-03
申请号：JP7958699
申请日：1999-03-24
申请人： NIPPON PISTON RING CO LTD
发明人： TAKIGUCHI HIROSHI , OMIYA TAKAO
IPC分类号： F16D23/06 , B22F5/00 , B22F7/00 , B22F7/06 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To improve a friction characteristic and seizure resistance by applying a thermosetting resin (an expoxy resin) blended with walnut shell powder as a friction material to an Fe group sintered alloy material treated with steam, hardening/joining the thermosetting resin by performing heating/pressurizing processing, and forming a layer composed of the friction material on a surface. SOLUTION: A synchronizer ring 4 is manufactured from an Fe-based alloy sintered body by sintering green compact at a about 1000 to 1200 deg.C after being formed as the green compact by pressurizing alloy element powder in a metal mold by blending/mixing the alloy element powder such as graphite powder or Cu powder when necessary by prescribed blending quantity with iron powder or low alloy steel powder. A layer 45 composed of a friction material is formed on a vertical groove 44 for cutting lubricating oil of such a product and a tapering inner peripheral surface 40 having a ring-shaped strip groove 42 orthogonal to this vertical groove. This layer 45 is formed of the friction material by blending walnut shell powder with a thermosetting resin such as an epoxy resin to thereby increase a coefficient of dynamic friction of an inner peripheral surface to improve a friction characteristic and seizure resistance.

62. 发明专利

JP2000213551A END PIECE PRESSURE CONTACT TYPE HOLLOW CAMSHAFT 失效
公开(公告)号：JP2000213551A
公开(公告)日：2000-08-02
申请号：JP1883299
申请日：1999-01-27
申请人： NIPPON PISTON RING CO LTD
发明人： OGAWA EIJI , TAKEGUCHI SHUNSUKE
IPC分类号： F01L1/04 , B21D53/84 , B23K20/12 , F01L1/047 , F16B11/00 , F16D1/06
摘要： PROBLEM TO BE SOLVED: To provide a hollow camshaft capable of confining a burr occurring during pressure welding of an end piece. SOLUTION: In a hollow camshaft 1 wherein an end piece 3 is pressure welded to at least on end of a hollow shaft 2, the end piece 3 includes an end member pressure welded to the hollow shaft 2 and a confining member 8 extending in an axial direction of the end member, inserted into the hollow shaft 2 during pressure welding, and confining a burr 5 occurring inside of the hollow shaft 2, and the confining member 8 is composed of a sealing part having roughly the same shape as the inside shape of the hollow shaft 2 and a connecting part connecting end faces of the sealing part and the end member and forming a confining space 11 between the end faces and an inner peripheral face of the hollow shaft 2.

63. 发明专利

JP2000169951A FORMATION OF DOUBLE LAYER THERMALLY SPRAYED COATING ON SLIDING MEMBER 失效
公开(公告)号：JP2000169951A
公开(公告)日：2000-06-20
申请号：JP34295198
申请日：1998-12-02
申请人： NIPPON PISTON RING CO LTD
发明人： TAKAMURA HIROYUKI , ASAI HIDEHIRO
IPC分类号： F02F5/00 , C23C4/02
摘要： PROBLEM TO BE SOLVED: To form double layer thermally sprayed coating excellent in peeling resistance and crack resistance on the sliding face of a sliding member by thermally spraying a fitness layer on a wear resistant layer which is not subjected to mechanical working such as outer circumferential grinding, blasting or the like. SOLUTION: On the outer circumferential face 2 of a base material 1 of a piston ring 10, sprayed coating 5 composed of a wear resistant layer 3 and a fitness layer 4 is formed. The outer circumferential face 2 subjected to machining of the base material 1 made of cast iron is subjected to outer circumferential grinding, degreasing and shot blasting before thermal spraying and is finished to the roughness, e.g. of 10 to 70 μm Rz. The finished outer circumferential face 2 is thermally sprayed with a thermal spraying material of an Mo, an Ni-Cr alloy and chromium oxide to form a wear resistant layer 3, and, moreover, a thermal spraying material composed of Al, Fe, Ni, Mn and Cu is thermally sprayed to form a fitness layer 4. The thickness of the sprayed coating of the double layers is, e.g. >=300 μm. Since the surface of the wear resistant layer 3 is not subjected to outer circumferential grinding or the like, working stress causing the peeling or the cracks in the fitness layer 4 does not remain to improve the peeling resistance of the sprayed coating.

64. 发明专利

JP2000144391A SLIDING MEMBER 失效
公开(公告)号：JP2000144391A
公开(公告)日：2000-05-26
申请号：JP3987199
申请日：1999-02-18
申请人： NIPPON PISTON RING CO LTD
发明人： OGAWA KATSUAKI , KANEMITSU KEIICHI
IPC分类号： F02F5/00 , C23C14/06 , C23C14/32 , F16J9/26
摘要： PROBLEM TO BE SOLVED: To improve the wear resistance and scuffing resistance of a member while the peeling resistance of a film in which CrN is mainly oriented in the 100} plane by allowing CrN in the film to mainly orient in the 100} plane and allowing the film to contain a specified weight ratio of B. SOLUTION: This film contains 0.05 to 20 wt.% B. Preferably, the film contains 0.05 to 20 wt.% B and either or both of O and C respectively by

65. 发明专利

JP2000144341A SINTERED MEMBER 失效
公开(公告)号：JP2000144341A
公开(公告)日：2000-05-26
申请号：JP34654198
申请日：1998-11-18
申请人： NIPPON PISTON RING CO LTD , MITSUBISHI MOTORS CORP
发明人： OGAWA EIJI , TAKEGUCHI SHUNSUKE , MIYAUCHI KENICHI , KOBAYASHI MIKIKAZU
IPC分类号： F01L1/04 , B22F1/00 , B22F5/00 , C22C33/02 , C22C38/00 , C22C38/22 , C22C38/40
摘要： PROBLEM TO BE SOLVED: To provide a sintered member excellent in scuffing-resistance and pitching resistance and used as sliding parts for an internal combustion engine. SOLUTION: This sintered member has a compsn. contg., by weight, 1.5 to 3.0% C, 2.0 to 12.0% Cr, 0.5 to 3.0% Mo, 0.2 to 1.0% Si, 0.2 to 1.0% P, and the balance Fe with inevitable impurities, and in which the base structure is formed of pearlite or has a compsn. contg. 1.5 to 3.0% C, 2.0 to 12.0% Cr, 0.5 to 3.0% Mo,

66. 发明专利

JP2000130465A SYNCHRONIZER RING 失效
公开(公告)号：JP2000130465A
公开(公告)日：2000-05-12
申请号：JP30925398
申请日：1998-10-29
申请人： NIPPON PISTON RING CO LTD
发明人： TAKIGUCHI HIROSHI , INAO KYOKO , OMIYA TAKAO
IPC分类号： F16D23/06 , B22F3/24 , C23C8/26 , F16D23/02
摘要： PROBLEM TO BE SOLVED: To prevent scuffing at the time of high speed medium load low inertia and high speed low load high inertia by making this synchronizer ring of Fe system sintered alloy and applying nitriding in addition to blast treatment and steam treatment at least on its inner peripheral surface. SOLUTION: An Fe system alloy sintered body is manufactured by blending and mixing specified quantity of graphite powder in iron powder or low alloy steel powder and sintering it at 1,000-1,200 deg.C after making it into a green compact in a metal mold. Thereafter, surface roughness is made 30-70 μmRz by applying blast treatment on an inner peripheral surface of a synchronizer ring made of the sintered body worked in a specified shape, an iron oxide film is formed by steam treatment, formation of nitride in the inside of sintered alloy is prevented by sealing holes of the sintered alloy, and impact resistance is maintained. Furthermore, a nitrided layer is formed by nitriding treatment, and its hardness is made Hv 400-700. Consequently, an oil film formed on a contact surface with an objective member on the inner peripheral surface becomes thinner, a boundary lubricating state is maintained, and scuffing can be prevented even at the time of sliding of high speed medium load low inertia and high speed low load high inertia.

67. 发明专利

JP2000130458A UNIVERSAL JOINT 失效
公开(公告)号：JP2000130458A
公开(公告)日：2000-05-12
申请号：JP30541098
申请日：1998-10-27
申请人： NIPPON PISTON RING CO LTD
发明人： SHIMIZU TAKESHI
IPC分类号： F16C17/02 , F16D3/40
摘要： PROBLEM TO BE SOLVED: To realize a universal joint accurately operated over a long period by making a yoke slidable in an axial direction of a pin and smoothly rotating/ sliding the yoke relative to the pin. SOLUTION: In a universal joint having a pin hole in four directions at a right angle to each other in one plane by inserting in the intermediate between a pair of hubs 1, 2, driving a pin 4 into this pin hole and providing a block body 3 engaged with a yoke through the pin 4, a thin plate layered dynamic pressure bearing 5 is inserted in a clearance between the pin 4 driven into the block body 3 and the pin hole of the yoke engaged therewith.

68. 发明专利

JP2000081051A RUBBER SHAFT JOINT 失效
公开(公告)号：JP2000081051A
公开(公告)日：2000-03-21
申请号：JP29489198
申请日：1998-10-16
申请人： NIPPON PISTON RING CO LTD
发明人： TANAKA SHINICHI , SHIMIZU TAKESHI , SUGISAKI NOBUHIRO
IPC分类号： F16D3/12 , F16D3/50 , F16D3/68
摘要： PROBLEM TO BE SOLVED: To prevent peeling of rubber caused by shearing stress and the deterioration by stress concentration by axially projecting a plurality of projections from inner end faces opposed to metal hubs in both sides, by engaging the projections mutually in the circumferential direction with clearances formed between them, and by forming the outer circumferential faces of the projections flush with the outer circumferential faces of the hubs. SOLUTION: Three projections 12 which are axially projected from inner end faces opposed to two hubs 11 and mutually engaged in the circumferential direction at intervals are set flush with the outer circumferential faces of the respective hubs 11. That is to say, the side faces of the adjoining projections 12 in the circumferential direction of the hubs on the both sides are formed parts of two planes with the axial lines of the hubs set to the crossing lines and rubber 20 interposed between the driving- side and the driven-side hubs is divided circumferentially by the projections 12. The tensile and compressive stresses are thus generated without generating the shearing stress and there is no possibility that the outer circumferential part of the rubber 20 is peeled off from the hubs 11. This constitution can improve the durability of a contact type rubber shaft joint and prevent the stall of the device by rupture of the rubber.

69. 发明专利

JP2000054087A IRON-BASE SINTERED ALLOY MATERIAL FOR VALVE SEAT, AND ITS MANUFACTURE 失效
公开(公告)号：JP2000054087A
公开(公告)日：2000-02-22
申请号：JP21762698
申请日：1998-07-31
申请人： NIPPON PISTON RING CO LTD
发明人： SATO KENICHI , KAKIUCHI ARATA , TAKAHASHI TERUO
IPC分类号： F01L3/02 , C22C33/02 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide an iron-base sintered alloy material for valve seat, excellent in wear resistance and thermal settling resistance. SOLUTION: Cr-Mo-Si-Co alloy grains are dispersed as hard grains in a matrix phase by 10 to 30% in the area ratio, and also porosity is regulated to 1 to 10% in the volume ratio. Grains of one or >=2 solid lubricants selected from sulfides such as MnS and MoS2, and fluorides such as CaF2 can be dispersed by 0.1 to 5.0 wt.%. It is preferable to manufacture the alloy material by kneading and molding raw material powders and successively passing the resultant green body through a primary sintering stage, a repressing/forging stage where repressing by press or squeezing by roll forging is done, and a secondary sintering stage.

70. 发明专利

JP2000001767A SLIDING MEMBER 失效
公开(公告)号：JP2000001767A
公开(公告)日：2000-01-07
申请号：JP17093098
申请日：1998-06-18
申请人： NIPPON PISTON RING CO LTD
发明人： ONODA MOTONOBU , OGAWA KATSUAKI , KANEMITSU KEIICHI
IPC分类号： B23P9/00 , C23C14/02 , C23C14/06 , C23C28/00 , C23C30/00
摘要： PROBLEM TO BE SOLVED: To provide a sliding member coated with a film excellent in wear resistance, scuffing resistance and the characteristics of increasing no wear of the mating material (mating attackability). SOLUTION: The outer circumferential face 3 of a sliding member is coated with a Cr-V-B-N alloy film 4. At this time, the Cr-V-B-N alloy film is formed preferably by a physical vapor deposition method, particularly, an ion plating method, a vacuum deposition method or a sputtering method, and, preferably, the content of V is 0.1 to 30 wt.%, and the content of B is 0.05 to 20 wt.%. Since the Cr-V-B-N allay film 4 formed on the outer circumferential face 3 of the sliding member is excellent in wear resistance, scuffing resistance and mating attackability, even in the case the sliding environment of the sliding member is made severe, the performance to be required can be satisfied. Moreover, preferably, the whole circumferential face or at least the outer circumferential face 3 of the sliding member is provided with a nitriding layer 5, and the surface of the nitriding layer 5 is coated with the Cr-V-B-N alloy film 4.

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