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51. 发明专利

JP2004011725A ROLLING ELEMENT HOLDING SPACER, AND ROLLING BEARING USING IT 审中-公开
公开(公告)号：JP2004011725A
公开(公告)日：2004-01-15
申请号：JP2002164794
申请日：2002-06-05
申请人： NSK LTD
发明人： RYU SUSUMU
IPC分类号： F16C33/372 , F16C19/36 , F16C19/40 , F16C33/36 , F16C33/37 , F16C33/60
摘要： PROBLEM TO BE SOLVED: To provide a rolling element holding spacer capable of successfully guiding the rotating position of a rolling element, and to provide an inexpensive bearing capable of receiving a radial load, a bilateral axial load, and a moment load using it. SOLUTION: The rolling element holding spacer 6 has holding portions 7 and 7 for holding respective rolling elements 5 and 5 on facing surfaces 8 and 8, and holds the adjacent rolling elements 5 and 5 between a pair of bearing race rings 1 and 2. A collar-like guide part 9 interposed between the inner diameter surface 1c of one bearing race ring 1 and the outer diameter surface 2c of the other bearing race ring 2 is protrusively disposed on the outer periphery. COPYRIGHT: (C)2004,JPO

52. 发明专利

JP2003247551A ROLLING BEARING 审中-公开
公开(公告)号：JP2003247551A
公开(公告)日：2003-09-05
申请号：JP2002365347
申请日：2002-12-17
申请人： NSK LTD
发明人： YATANI KOICHI , KURAISHI ATSUSHI , HOKAO MICHITA , RYU SUSUMU , MATSUMOTO YOICHI
IPC分类号： F16C33/34 , F16C33/54 , F16C33/64 , F16C33/66
摘要： PROBLEM TO BE SOLVED: To provide a rolling bearing which can be used for a long time even if lubrication is insufficient. SOLUTION: In the rolling bearing configured by retaining a plurality of rolling elements between the inner and outer rings through a retainer, a particle on the surface of the rolling element having particle size of 2 μm or more and hardness of 8 GPa or more is 400 pieces/mm 2 or less per unit surface area. Furthermore, the particle on the track surface and sliding surfaces at least either of the inner or outer ring or both of them having particle size of 2 μm or more and hardness of 8 GPa or more is 400 pieces/mm 2 or less per unit surface area. COPYRIGHT: (C)2003,JPO

53. 发明专利

JP2003097549A ROLLING BEARING DEVICE 审中-公开
公开(公告)号：JP2003097549A
公开(公告)日：2003-04-03
申请号：JP2001294399
申请日：2001-09-26
申请人： NSK LTD
发明人： RYU SUSUMU , SHODA YOSHIO
IPC分类号： F16C19/16 , F16C33/32 , F16C33/38 , F16C33/60
摘要： PROBLEM TO BE SOLVED: To provide a rolling bearing device adaptable for a machine tool of high-speed run or the like, having saved space and lower cost. SOLUTION: A rotating shaft 14 is supported by two cylindrical roller bearings 15 and one rolling bearing. The bearing has a plurality of rollers 6 incorporated between an outer ring 1 and an inner ring 2, and the outer ring 1 and the inner ring 2 each have a raceway groove consisting of raceway surfaces 4, 5 with their diameters larger than the radius of the roller 6, in which at least one bearing ring consists of two raceway surfaces 4a.4b (5a.5b). The rollers 6 each having an outer diameter 6a as a rolling contact surface with a curvature in the axial direction are alternately arranged crossing one another on a circumference. The outer diameters 6a of the rollers 6 contact one another at one point each, or two points in total, one point being one raceway surface 4a of the outer ring 1 and one raceway surface 5b of the inner ring 2 facing thereto and the other point being between one raceway surface 4b of the outer ring and one raceway surface 5a of the inner ring 2 facing thereto.

54. 发明专利

JP2002242935A BEARING APPARATUS 失效
公开(公告)号：JP2002242935A
公开(公告)日：2002-08-28
申请号：JP2001013755
申请日：2001-01-22
申请人： NSK LTD
发明人： RYU SUSUMU , YAMAMOTO HISATO , NOGUCHI SHOJI , TANAKA SUSUMU , OHORI MANABU , TAKAMIZAWA TORU , MIYAZAKI SEIZO , SHODA YOSHIO
IPC分类号： F16C33/32
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive bearing apparatus, which is excellent in various characteristics such as fretting durability, wear and abrasion resistance, and seizure resistance as well as fatigue life, of which life is not shortened caused by occurrence of indentations by foreign matters, and which can solve the following problems: the problem caused by reduction in load capacitance and shock resistance, and releasing of preload and action of static electricity (for example, foreign matters, noise causing increase in defective fraction and carriage trouble occurring at an assembly process); the problem of seizure and friction at a time of high speed rotation when employing a full type ball bearing or a full type rolling bearing, or early peeling under high temperature or low temperature environment; and the problem such as change occurring when using a ceramic rolling element, in structure of periphery of bearing installation portion. SOLUTION: In the bearing apparatus, the rolling element is disposed between an outer member and inner member, a surface of the rolling element has a nitride layer that is formed of a compound layer of not less than 900 Hv in Vickers hardness, and a diffusion hardening layer.

55. 发明专利

JP2002130289A ROLLING-ELEMENT BEARING 失效
公开(公告)号：JP2002130289A
公开(公告)日：2002-05-09
申请号：JP2000323206
申请日：2000-10-23
申请人： NSK LTD
发明人： RYU SUSUMU , SHODA YOSHIO , SATO YUKIO
IPC分类号： F16C33/36 , F16C33/66
摘要： PROBLEM TO BE SOLVED: To provide a rolling-element bearing, capable of suppressing spin slide of a rolling body in a track groove, and capable of carrying radial load, of which the reduction in torque is achieved by reducing rolling resistance, and also to provide axial load and moment load in both directions. SOLUTION: A plurality of rolling bodies 5, 5 and so on, each of which has an outside diameter 5a as a rolling contact, having a radius of curvature also in the direction of the axis, and has a small-diameter radius smaller than the radius of a track face, is mounted in a track groove 3 formed between outer and inner rings 1, 2. In the rolling bodies 5, the adjoining rolling bodies 5, 5 are arranged so as to alternately cross each other, and outside diameters 5a, 5a of the rolling bodies 5, 5 contact with two points of track faces 1a, 1b of a track ring 1 and two points of track faces 2b, 2a of another track ring 2 at all times. Also, a sealing plate 10 is arranged between the outer and inner rings 1, 2.

56. 发明专利

JP2004011724A ROLLING BEARING 审中-公开
公开(公告)号：JP2004011724A
公开(公告)日：2004-01-15
申请号：JP2002164793
申请日：2002-06-05
申请人： NSK LTD
发明人： RYU SUSUMU
IPC分类号： F16C19/36 , F16C19/16 , F16C33/32 , F16C33/36 , F16C33/58
摘要： PROBLEM TO BE SOLVED: To provide a compact and long-life bearing capable of receiving a radial load, a bilateral axial load, and a moment load, in a service condition where difference between loads charged in both axial directions is large. SOLUTION: A plurality of rolling elements are built between race rings, and each race ring has each raceway groove formed of a raceway surface having radius larger than radius of the rolling elements. At least one race ring of them is formed of two raceway surfaces. The outer radius as a rolling contact surface of each rolling element has curvature also in the axial direction, and is cross disposed on the circumference. The outer radii of respective rolling elements contact with each other at total of two points, each point on the always facing raceway surfaces of one race ring and the other race ring. A first region L1 for axially charging a large load and a second region L2 for axially charging a small load are circumferentially alternately crossed, and the number of the rolling elements 5 built in the first region is larger than that of the rolling elements 5' built in the second region. COPYRIGHT: (C)2004,JPO

57. 发明专利

JP2003232362A ROLLER BEARING 审中-公开
公开(公告)号：JP2003232362A
公开(公告)日：2003-08-22
申请号：JP2002306047
申请日：2002-10-21
申请人： NSK LTD
发明人： SHIBAZAKI KENICHI , RYU SUSUMU
IPC分类号： F16C33/41 , F16C33/66
摘要： PROBLEM TO BE SOLVED: To provide a roller bearing by which fluid flow of a lubricant or the like around a retainer can be rectified, a high effect for cooling a bearing by a fluid can be secured, and also fluid resistance can be lowered, reduction of rotational torque and suppression of heat generation can be promoted. SOLUTION: This roller bearing is provided with a plurality of slender grooves 12 formed over the entirety of an outer peripheral face 10a and an inner peripheral face 10b, except for an inner peripheral face 11a in the pocket 11 of the retainer 10 and both the side end faces of the retainer 10. The plurality of these slender grooves 12 are formed in a parallel or nearly parallel condition along the circumferential direction of the retainer 10. These slender grooves 12 are set 1 mm in width, 0.5 mm in depth, 1 mm in intervals between adjacent grooves. COPYRIGHT: (C)2003,JPO

58. 发明专利

JP2002206526A ROLLING BEARING 失效
公开(公告)号：JP2002206526A
公开(公告)日：2002-07-26
申请号：JP2000403102
申请日：2000-12-28
申请人： NSK LTD
发明人： RYU SUSUMU , SHODA YOSHIO
IPC分类号： F16C19/34 , F16C33/36 , F16C33/37 , F16C33/372 , F16C33/46 , F16C33/60
摘要： PROBLEM TO BE SOLVED: To provide a rolling bearing capable of receiving a radial load, axial loads in both directions, and a moment load by one bearing capable of improving a characteristic of resistance against spin wear, providing high moment rigidity, and reducing torque. SOLUTION: This rolling bearing consists of a bearing ring 1 having a raceway surface 4, a bearing ring 2 having a raceway surface 5, and a rolling body 6 incorporated between inner and outer rings 1 and 2. The raceway surface 4 of at least one bearing ring 1 is composed of two raceway surfaces 4a, 4b, which are constituted to have large diameters than a radius of the rolling body 6. Each rolling body is constituted such that an outside diameter 6a which becomes a rolling contact face has a curvature in the axial direction and is arranged in a crossing manner alternately on circumference. The outside diameter 6a of each rolling body 6 comes into contact at two points in total, namely, at one point of the raceway surface 4a of the bearing ring 1 on one side and the raceway surface 5 of the bearing ring 2 on the other side which oppose mutually and at one point of the raceway surface 4b of the bearing ring 1 on one side and the raceway surface 5 of the bearing ring 2 on the other side, respectively.

59. 发明专利

JP2000350402A MINIATURE MOTOR FOR INFORMATION APPARATUS 失效
公开(公告)号：JP2000350402A
公开(公告)日：2000-12-15
申请号：JP15685399
申请日：1999-06-03
申请人： NSK LTD
发明人： NISHIMURA NOBUHIKO , SHIMOKAWA TAKASHI , RYU SUSUMU , NAKAMURA HIROYUKI
IPC分类号： H02K5/173 , F16C25/08 , H02K5/16
摘要： PROBLEM TO BE SOLVED: To reduce the size of a miniature motor for an information apparatus. SOLUTION: A cylindrical housing 2 is placed on the center of a frame 1, and a stator 3 is fixed to the outer circumferential surface of the housing 2 in the circumferential direction. A shaft member 4 is placed coaxially on the inner circumferential side of the housing 2. The inner circumferential surface of the housing 2 is connected to the shaft member 4 with one roller bearing 5, to make the housing 2 and the shaft member 4 rotatably support each other relatively. The stator 3 and a rotor magnet 7 have approximately the same width and are assembled so as to be relatively shifted in an axial direction by a length L. With this constitution, as the center of a magnetic force is relatively shifted by a length L in the axial direction, an attractive force corresponding to the shift value L is generated between the magnet 7 and the stator 3 in the axial direction. As a result, a prepressure in the axial direction is applied to the bearing 5.

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