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1. 发明专利

JPH11210766A THREE POINT CONTACT BALL BEARING 失效
公开(公告)号：JPH11210766A
公开(公告)日：1999-08-03
申请号：JP31211098
申请日：1998-11-02
申请人： NIPPON SEIKO KK
发明人： TANIGUCHI MASAHITO , ARAMAKI HIROTOSHI , NAKANO YUJI , ISHIGURO HIROSHI
IPC分类号： F16C19/10 , F16C19/16 , F16C33/58
摘要： PROBLEM TO BE SOLVED: To reduce an eccentric wear and enlarge an axial rigidity by making the carvature radius of the track groove of a first track race having a single arc shape within the specific range of the ball diameter of a rolling body. SOLUTION: In a three point contact ball bearing B, the track groove surface 13a of an outer race 13 receiving a static load is made by a single arc section shape consisting of a radius Re, while the section shape of the track groove surface 12a of an inner race 12 receiving a rotary load is made by a Gothic arch shape contacted to a ball 14 by a rest angle β. The carvature (Re/Da) of the track groove of a first track race having the single arc shape is made into a range from 50.3% to 53.3% of a ball diameter Da. In this case, it is further favorable to make into the range from 50.5% to 50.0% of the ball diameter Da. Then, the eccentric wear by a spin can be reduced and the axial rigidity can be enlarged than a deep groove ball bearing.

2. 发明专利

JPH09133130A MULTI-POINT CONTACT BALL BEARING 失效
公开(公告)号：JPH09133130A
公开(公告)日：1997-05-20
申请号：JP28842195
申请日：1995-11-07
申请人： NIPPON SEIKO KK
发明人： TANIGUCHI MASAHITO
IPC分类号： F16C19/16
摘要： PROBLEM TO BE SOLVED: To provide a three-point contact ball bearing which can reduce friction for sliding and has good wear resistance and seizure resistance. SOLUTION: A three-point contact ball bearing 1 has raceway surfaces of two inner ring 2 and one outer ring 3 and a ball 5 retained by a retainer 4 is put into contact with the raceway surfaces at three points at the maximum. The inner ring 2 are divided into two rings and mated to each other. The ball 5 is dipped into organophosphorus compound which is previously adjusted in a prescribed concentration to chemically react and thus has a reaction film layer of organophosphorus compound on the surface thereof.

3. 发明专利

JPH02236019A SPHERICAL MAGNETIC BEARING 失效
公开(公告)号：JPH02236019A
公开(公告)日：1990-09-18
申请号：JP5529089
申请日：1989-03-08
申请人： NIPPON SEIKO KK
发明人： TANIGUCHI MASAHITO , AIHARA SATORU
IPC分类号： F16C32/04
摘要： PURPOSE:To obtain magnetic levitation function by providing a controlling means connected to a plurality of electromagnets located opposite to an outer surface of a spherical body and a slit detecting means for controlling supplied current to the electromagnets so that equal slits are provided between the respective electromagnets and the spherical body. CONSTITUTION:Since current is supplied from a driving current adjuster 12 to each of electromagnets 4 with operation of control circuit to excite the electromagnets 4 to have a spherical body 1 sucked, the spherical body 1 comes off a sliding bearing 7 to be floated in the air. On the other hand, a slit amount between the outer surface of the spherical body 1 and a slit sensor 6 is detected by each slit sensor 6 and each detected value is input to an I/O port 11 via a filter 10. A CPU 13, based on the difference among the respective detected values, supplies individual control signals so that the respective slit amounts are equal to the adjuster 12 via the I/O port 11, and the adjuster 12 increases/ decreases the current amount to be output to the electromagnets 4 according to the control signals. Therefore the slit amounts between the peripheral body 1 and the sensors 6 are kept equal so that the spherical body 1 is kept at the desired spatial position.

4. 发明专利

JPH1162990A MULTIPOINT CONTACT BALL BEARING 失效
公开(公告)号：JPH1162990A
公开(公告)日：1999-03-05
申请号：JP11588198
申请日：1998-04-13
申请人： NIPPON SEIKO KK
发明人： TANIGUCHI MASAHITO
IPC分类号： F16C19/16 , F16C33/58 , F16C33/64
摘要： PROBLEM TO BE SOLVED: To provide a multipoint contact ball bearing to facilitate reduction of friction torque, prevention of wear, and improvement of durability by high- efficient improvement of surface coarseness of the raceway surface of a race when the race having a track surface making contact with a steel ball at two points consists of a single ring member. SOLUTION: The outer ring 12 of a two-piece inner ring type four-point contact ball bearing 10 consists of a single ring member of which a raceway surface 12a having the sectional shape of a Gothic arch is formed. Barreling is by a centrifugal barreling machine is applied on an outer ring 12 to improve surface coarseness of the raceway surface 12a. When barreling is executed by the centrifugal barreling machine for 12 hours in seccession, surface coarseness of the outer ring 12 having surface coarseness of 0.3 μmRa before barreling is improved to 0.06 μmRa.

5. 发明专利

JPH11247863A MULTIPOINT CONTACT BALL BEARING 失效
公开(公告)号：JPH11247863A
公开(公告)日：1999-09-14
申请号：JP5525398
申请日：1998-03-06
申请人： NIPPON SEIKO KK
发明人： TANIGUCHI MASAHITO , KONNO MASARU , ARAMAKI HIROTOSHI
IPC分类号： F16C33/62 , C23C14/06 , C23C16/36 , F16C19/14
摘要： PROBLEM TO BE SOLVED: To provide a multipoint contact ball bearing excellent in abrasion resistance and seizure resistance by applying surface preparation on a bearing ring of the multipoint contact ball bearing. SOLUTION: A hard film is applied at least on a surface of a track surface of one or both of bearing rings consisting of both rings of an inner ring (1a, 1b in case of two-piece inner ring) and an outer ring 2 on a multipoint contact ball bearing of three point contact, four point contact, etc. It is possible to use a super hard film of, for example, CrN, TiN, TiC, etc., as the film. Additionally, film thickness is desirably in a range of 0.1-5 μm, favourably 0.3-4 μm and more favourably 0.5-3 μm.

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