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1. 发明专利

JPH07109541A PRODUCTION OF ULTRACLEANLINESS BEARING STEEL AND ULTRACLEANLINESS BEARING STEEL 失效
公开(公告)号：JPH07109541A
公开(公告)日：1995-04-25
申请号：JP27771893
申请日：1993-10-08
申请人： NIPPON SEIKO KK , SANYO SPECIAL STEEL CO LTD , NIKKO KINZOKU KK , JAPAN ENERGY CORP
发明人： FURUMURA KYOSABURO , ABE TSUTOMU , NISHIMORI HIROSHI , KITADE SHINICHI , SHIMIZU FUMIYUKI
IPC分类号： C22C33/04 , C22C38/00 , C22C38/22 , C22C38/44
摘要： PURPOSE:To obtain an ultracleanliness bearing steel excellent in fatigue properties by using a bearing steel in which the content of Mn is limited as a base metal and regulating the diameter of oxide inclusion grains through electron beam remelting and the subsequent ingot-making operation. CONSTITUTION:In this method, a bearing steel in which the content of Mn is limited to =15mum diameter from the molten metal in the conditions that the dimension of the refining container, the position of baking and the melting speed satisfy the relationship expressed by the formula. Thus, the ultracleanliness bearing steel whose oxide inclusion grains is regulated to

2. 发明专利

JPS6343024A HOLDER FOR ROLLING BEARING 失效
公开(公告)号：JPS6343024A
公开(公告)日：1988-02-24
申请号：JP18548886
申请日：1986-08-07
申请人： NIPPON SEIKO KK
发明人： ABE TSUTOMU
IPC分类号： F16C33/38 , F16C33/44
摘要： PURPOSE:To maintain the stable lubricating function at high-speed rotation and heavy-load rotation by forming a gap layer by the dezincing process on the rolling element holding face of a holder made of brass and providing a lubricant layer permeated with a solid lubricant on this gap layer. CONSTITUTION:A lubricant layer 17 permeated with a solid lubricant from the surface 16 to the inside of a pocket 15 is provided on a holder 14 made of brass. A ball bearing 10 assembled with this holder 14 is used by coating both or one of the orbit faces of an outer ring 11 and an inner ring 12 and the surface of a ball 13 with a solid lubricant. Even if the lubricating film is peeled off by the rolling friction of the ball 13 while this ball bearing 10 is in use, the solid lubricant of the lubricant layer 17 provided on the surface 16 of the pocket 15 oozes as an abrasion material and is transferred and sticks to the surface of the pocket 15, and furthermore the solid lubricant stuck to the ball 13 is transferred and sticks to the orbit faces of the outer ring 11 and the inner ring 12, and a new lubricating film is formed.

3. 发明专利

JPH0989724A LIFE TESTER FOR BEARING 失效
公开(公告)号：JPH0989724A
公开(公告)日：1997-04-04
申请号：JP24121495
申请日：1995-09-20
申请人： NIPPON SEIKO KK
发明人： TAKEMURA HIROMICHI , ABE TSUTOMU , HOSOYA MASAYUKI
IPC分类号： G01M13/04
摘要： PROBLEM TO BE SOLVED: To perform the life tests of various kinds of bearings at the low cost and in high reliability by measuring the loads, which are applied on the first housing, which supports a support bearing for supporting a rotary shaft in high rigidity, and a second housing, which supports a bearing under test for supporting the intermediate part of the rotary shaft freely rotatably in low rigidity. SOLUTION: A support bearing 15 is supported and fixed at a supporting wall 12 corresponding to the first housing in high rigidity. However, the supporting rigidity of a bearing under test 20, which is provided for supporting the intermediate part of a rotary shaft 2 at the second housing 19 is low. Therefore, bending stress is applied on the rotary shaft 2 by a radial load applied on a driven pulley 6 from the tension of an endless belt 7. The bending stress and the radial load Fp applied from the endless belt 7 are combined, and the complicated force in conformity with the actual service condition is applied on the bearing 20. Then, damages such as early peeling occur. In this way, the applied load and the rotating speed are made to be the values in conformity with the actual service condition, and the highly reliable test can be performed.

4. 发明专利

JPH07127643A ROLLING BEARING 失效
公开(公告)号：JPH07127643A
公开(公告)日：1995-05-16
申请号：JP27254493
申请日：1993-10-29
申请人： NIPPON SEIKO KK
发明人： ABE TSUTOMU , FURUMURA KYOSABURO
IPC分类号： F16C33/30 , F16C33/32 , F16C33/34
摘要： PURPOSE:To provide a rolling bearing of low cost, high quality and long life, by clarifying the relationship between the central segregation rate of carbon in a material and a finished product constituting a rolling body and the life of a rolling body. CONSTITUTION:A material constituting a rolling body is composed of a bearing steel wire rod by continuous casting, the central segregation rate of carbon (C/Co) in the material and the finished product satisfies to be less than 1.1, and the oxygen content in steel of the material is less than 10ppm and the sulpher content in steel of the material is less than 0.008wt.%, respectively set.

5. 发明专利

JPH03126839A STEEL FOR BEARING AND ROLLING BEARING 失效
公开(公告)号：JPH03126839A
公开(公告)日：1991-05-30
申请号：JP26479289
申请日：1989-10-11
申请人： NIPPON SEIKO KK
发明人： NARAI HIROSHI , ABE TSUTOMU , OKITA SHIGERU
IPC分类号： G01M13/04 , C22C38/00 , C22C38/22 , F16C33/12 , F16C33/62 , G01N33/20
摘要： PURPOSE:To improve the service life in the rolling bearing by regulating the average grain size, the number to be incorporated, the content and the oxygen content of oxide inclusions in a steel for a rolling bearing into a specified range. CONSTITUTION:A steel for a bearing is worked to form into a bearing ring or a rolling element in a rolling bearing, which is subjected to carburization hardening treatment and tempering treatment. The parts of the rolling bearing are tested by an evaluating method by electron beam melting and extracting, and the average grain size, the number to be incorporated and the content of oxide inclusions to be incorporated into the steel are measured and regulated into the range of the following value. Namely, as for the grains in the oxide inclusions, the number of the ones having 3 to 30mum average grain size is regulated to ) and the ratio of the ones having >=10mum average grain size is regulated to ), or the number having 10 to 15mum average grain size is regulated to

6. 发明专利

JPH08166014A THRUST NEEDLE LIKE ROLLER BEARING, ROLLING BEARING, AND CAGE OF THRUST NEEDLE LIKE ROLLER BEARING 失效
公开(公告)号：JPH08166014A
公开(公告)日：1996-06-25
申请号：JP17546495
申请日：1995-06-19
申请人： NIPPON SEIKO KK
发明人： IKEZAWA KATSUHIRO , IWASA HIROSHI , NOMURA YASUHIRO , KAWAMURA TOSHIRO , NARAI HIROSHI , NAGATO TAKASHI , KONNO MASARU , ABE TSUTOMU , HAMAMOTO MAGOZO , UEKI FUMIO , TAKAGI TOSHIMI
IPC分类号： F16C19/22 , F16C19/30 , F16C33/46 , F16C33/54 , F16C33/56
摘要： PURPOSE: To provide a thrust needle like roller bearing which reduces dynamic torque greatly and can prevent coming off of a roller while maintaining stability of posture of the roller and easiness of cutting work. CONSTITUTION: A needlelike roller in which a crowning section having a ratio of diameter of the roller (Da) to the length (lr), lr/Da, of 1.2-2.0 and the contact length with a raceway track face of 3/4 or less of the length (lr) of the roller is formed is adopted as the needlelike roller of a thrust needle like roller bearing.

7. 发明专利

JP2936657B2 失效
公开(公告)号：JP2936657B2
公开(公告)日：1999-08-23
申请号：JP16801690
申请日：1990-06-26
申请人： NIPPON SEIKO KK
发明人： KOBAYASHI MASAYUKI , ABE TSUTOMU
IPC分类号： G01B7/06 , C21D1/06 , G01B7/00 , G01N27/80 , G01R33/12

8. 发明专利

JPH11118011A POWER ROLLER BEARING OF TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH11118011A
公开(公告)日：1999-04-30
申请号：JP27907797
申请日：1997-10-13
申请人： NIPPON SEIKO KK
发明人： IMANISHI TAKASHI , GOTO NOBUO , ABE TSUTOMU
IPC分类号： F16H15/38 , F16C33/38
摘要： PROBLEM TO BE SOLVED: To perform the rolling motion of a rolling element smoothly even in the case where a power roller bearing outer ring is made so as to be deformed, thereby improving the reliability of a power roller bearing by constituting a cage holding plural pierces of rolling elements each free of rolling motions, from three retaining plates to be formed into nearly hollow toroidal form as a whole. SOLUTION: In this toroidal type continuously variable transmission which is comprised of a structure combined with both input and output disks and a power roller, a cage 1 assembled into a power roller bearing is composed of three retaining plates 2 to 4 forming into one hollow toroidal form as a whole. In addition, plural pieces of round pocket holes 5 are arranged on the retaining holes 2 to 4 along the circumferential direction of each retaining plate, and each of rolling element is held in each of the pocket holes 5 free of rolling motions. In this cage 1 thus constituted, the retaining plates 2 to 4 are individually able to increase or decrease a radius from the turning center. Therefore, even at a time wen an outer ring of the power roller bearing is deformed, and the locus of a raceway groove has already lost its complete round form, rolling motions of respective rolling elements are smoothly performed.

9. 发明专利

JPH07229548A TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH07229548A
公开(公告)日：1995-08-29
申请号：JP2260494
申请日：1994-02-21
申请人： NIPPON SEIKO KK
发明人： HAGINUMA KIYOSHI , MACHIDA TAKASHI , ABE TSUTOMU
IPC分类号： F16H15/38
摘要： PURPOSE:To prevent the oscillation of an output shaft from being transmitted to an input shaft so as to improve durability and reliability. CONSTITUTION:A supporting bracket 50 is mounted on the inner side of a through hole 41a formed in the output side wall part 17 of a housing 15. The top end of an input shaft 18 is supported by a needle bearing 49 on the supporting bracket 50. An output shaft 40 is supported by a rolling bearing 42 on a bracket 45 fixed on the outer face of the output side wall part 17.

10. 发明专利

JPH0771555A TOROIDAL TYPE CONTINUOUSLY VARIABLE TRANSMISSION 失效
公开(公告)号：JPH0771555A
公开(公告)日：1995-03-17
申请号：JP23871093
申请日：1993-08-31
申请人： NIPPON SEIKO KK
发明人： KOKUBU HIDEKI , ABE TSUTOMU , MACHIDA TAKASHI
IPC分类号： F16H15/38
摘要： PURPOSE:To enhance the rolling life, and also to enhance the fatigue-crack resisting life by subjecting input/output disks and a power roller to carburizing treatment and grinding finish, and by specifying the effective thicknesses of the hardened layers thereof. CONSTITUTION:In a toroidal type continuously variable transmission, the power of an input shaft 13 is transmitted to a loading cam 14, and the power is transmitted to an input disk 11 via a cam roller 15 by the rotation of the cam 14, and the power produced by the rotation of the input disk 11 is transmitted to an output disk 12 via power rollers 16 and 17. In this case, the input/output disks 11, 12 and the power roller 16 are subjected to carburizing treatment and grinding finish, or to carbonitriding treatment and grinding finish. Further, the effective thickness of the hardened layer of at least one out of both disks 11, 12 and the power roller 16 is set to be 2.0mm or more and 4.0mm or less. Thus, the occurrence of separation on the traction surfaces of both the disks 11, 12 or the like can be prevented.

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