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1. 发明专利

JP2002242949A CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2002242949A
公开(公告)日：2002-08-28
申请号：JP2001042361
申请日：2001-02-19
申请人： NTN TOYO BEARING CO LTD
发明人： GOTOU TATSUHIRO , KANEHARA TADASHI , TONE HIROSHI , ITAGAKI TAKU
IPC分类号： F16D3/205
摘要： PROBLEM TO BE SOLVED: To improve rolling property of a rolling body in a constant velocity universal joint. SOLUTION: The constant velocity universal joint comprises: an outer joint member; a tripod member; and roller mechanisms installed to shaft legs of the tripod member. The roller mechanism A has a supporting roller 32, a roller 34, a needle roller 36 interposed between the roller 34 and the supporting roller 32, and locking rings 33, 35 with ends having slits attached to the roller 34. In the roller mechanism A, endless-ring-shaped washers 37, 38 are disposed between lock rings 33, 35 and the needle roller.

2. 发明专利

JP2002168262A RUN-OFF PREVENTION DEVICE FOR TRIPOD-TYPE CONSTANT- VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2002168262A
公开(公告)日：2002-06-14
申请号：JP2000360979
申请日：2000-11-28
申请人： NTN TOYO BEARING CO LTD
发明人： TONE HIROSHI , GOTOU TATSUHIRO , ITAGAKI TAKU , KURA HISAAKI , IIHARA MICHIO , SAGISAKA YOSHIHIRO , ARAGAI TAKASHI
IPC分类号： F16D3/205 , B21K1/14
摘要： PROBLEM TO BE SOLVED: To provide a run-off prevention device for a tripod-type constant- velocity universal joint easy to mount a clip for preventing a run-off of a guide roller of a tripod member and easy to install the tripod member. SOLUTION: Eech of first chamfers 11 is formed on the internal surface of the tip of the edge of the outer-ring opening side of each small-diameter section 9 formed between track grooves 2 of the outer ring 1, and second chamfers 13 are formed at both sides of the first chamfer 11 in the direction of the periphery. A clip 15, which is cut off at one part, is mounted to a clip- mounting groove 12 formed at the first chamfer 11 and, at the clip 15, there are formed an arc section 17 along the arc-shaped internal surface 16 of the track groove 2, a linear-shaped run-off prevention section 20 along the second chamfer 13, a fitting section 18 fitted to the clip-mounting groove 12. Then, the guide roller 6 inserted into the track groove 2 is prevented from running off by the run-off prevention section 20.

3. 发明专利

JP2001187924A CONSTANT VELOCITY JOINT 失效
公开(公告)号：JP2001187924A
公开(公告)日：2001-07-10
申请号：JP37512999
申请日：1999-12-28
申请人： NTN TOYO BEARING CO LTD
发明人： MAEDA KIKUO , GOTOU TATSUHIRO
IPC分类号： F16D3/205 , F16D3/20
摘要： PROBLEM TO BE SOLVED: To provide a constant velocity joint that comprises structural members of a material resistant to fatigue cracking and excellent in durability. SOLUTION: Major structural members are a tripod member having three radially projecting leg shafts, an outer joint member having three axial track grooves in the internal surface and having an axial roller guide surface on each side of each track groove, and rolling members interposed between the leg shafts of the tripod member and the outer joint member to transmit torque. The rolling members comprise a steel material including as its alloy elements at least, by mass %, C of 0.6% to 1.3%, Si of 0.3% to 3.0%, Ni of 0.1% to 3.0%, Mn of 0.2% to 1.5% and Cr of 0.3% to 5.0%, and have surface hardness of HRC 58 or more in Rockwell hardness.

4. 发明专利

JP2000257643A CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2000257643A
公开(公告)日：2000-09-19
申请号：JP5901899
申请日：1999-03-05
申请人： NTN TOYO BEARING CO LTD
发明人： SAKAGUCHI AKIO , KURA HISAAKI , SUGIYAMA TATSURO , GOTOU TATSUHIRO , TERADA KENJI , TONE HIROSHI , KURODA MASAYUKI
IPC分类号： F16D3/205
摘要： PROBLEM TO BE SOLVED: To reduce induced thrust and slide resistance of a sliding tripod type constant velocity universal joint. SOLUTION: In a constant velocity universal joint provided with an outer side joint member 10 formed with three track grooves 12 having a roller guide surface 14 arranged to be opposed to each other in a circumferential direction, tripod member 20 provided with three leg shafts 22 protruded in a radial direction, rollers 34 inserted in the track groove 12, and rings 32 externally fitted to the leg shaft 22 to rotatably support the roller 34, to make the roller 34 movable in an axial direction of the outer side joint member 10 along the roller guide surface 14, a relatively rotatable roller assembly is constituted by interposing a plurality of balls 36 between the ring 32 and the roller 34, an internal peripheral surface of the ring 32 is formed in a circular arc-shaped protruded section, also an external peripheral surface of the leg shaft 22 is formed in straight shape in a vertical section and, in a cross section, so as to abut to the internal peripheral surface of the ring 32 in a direction orthogonal to an axial line of the joint also so as to form a clearance between the external peripheral surface and the internal peripheral surface of the ring 32 in an axial line direction of the joint.

5. 发明专利

JPH11190354A CONSTANT SPEED UNIVERSAL JOINT 失效
公开(公告)号：JPH11190354A
公开(公告)日：1999-07-13
申请号：JP35794897
申请日：1997-12-25
申请人： NTN TOYO BEARING CO LTD
发明人： GOTOU TATSUHIRO
IPC分类号： F16D3/20
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of inferior operation which is likely to occur when a high torque is transmitted while a constant speed universal joint takes a large operation angle. SOLUTION: An outer spherical surface 5 of an inner race 1 is formed in part with relief part (a recessed groove 11, a recessed step part, or a recess) which are retracted from the spherical surface 5. With this arrangement, even though a hump is formed on the shoulder part 6 of a track groove 6, no affection is transmitted up to the spherical surface 5, thereby it is possible to maintain an appropriate contact condition with respect to the inner peripheral surface of a cage.

6. 发明专利

JPH0953150A CASE HARDENING STEEL AND PRODUCTION OF STEEL TUBE USING SAME 失效
公开(公告)号：JPH0953150A
公开(公告)日：1997-02-25
申请号：JP22738395
申请日：1995-08-11
申请人： SUMITOMO METAL IND , NTN TOYO BEARING CO LTD
发明人： AIHARA KENJI , FUJIOKA YASUHIDE , YOSHIDA KAZUHIKO , GOTOU TATSUHIRO , WAKITA AKIRA
IPC分类号： C21D8/10 , C22C38/00 , C22C38/32 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a case hardening steel with high strength and high toughness, having high impact fracture load, and to produce a high efficiency case hardening steel tube by using the case hardening steel. SOLUTION: This case hardening steel with high strength and high toughness has a composition consisting of 0.1-0.25% C, 0.2-0.4% Si, 0.3-0.9% Mn,

7. 发明专利

JP2001234941A CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2001234941A
公开(公告)日：2001-08-31
申请号：JP2000044720
申请日：2000-02-22
申请人： NTN TOYO BEARING CO LTD
发明人： SUGIYAMA TATSURO , GOTOU TATSUHIRO , ISHIGURO SHIGEYOSHI , TERADA KENJI , KURA HISAAKI
IPC分类号： F16D3/205 , F16D3/20
摘要： PROBLEM TO BE SOLVED: To reduce the induced thrust and sliding resistance of constant velocity universal joint. SOLUTION: This constant velocity universal joint is equipped with an external joint member 10 provided with three track grooves 12 having roller guide surfaces 14 arranged facing one another in the circumferential direction, a tripod member 20 furnished with three legs 22 protruding in the radial direction, rollers 34 inserted in the track grooves 12, and rings 32 fitted on the legs 22 for supporting the rollers 34 rotatably, and is arranged so that the rollers 34 are movable in the axial direction of the external joint member 10 along the guide surfaces 14, wherein the inside surface of each ring 32 is shaped cylindrically while the peripheral surface of each leg 22 is given a longitudinal cross-section in curved shape and such a crosswise section contacting with the inside surface of the ring 32 in the direction perpendicularly intersecting the axis of the joint and forming a gap with respect to the peripheral surface of the ring 32 in the axial direction of the joint.

8. 发明专利

JP2000154831A CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2000154831A
公开(公告)日：2000-06-06
申请号：JP32716098
申请日：1998-11-17
申请人： NTN TOYO BEARING CO LTD
发明人： SUGIYAMA TATSURO , GOTOU TATSUHIRO , KURODA MASAYUKI , KURA HISAAKI
IPC分类号： F16D3/20 , F16D3/205
摘要： PROBLEM TO BE SOLVED: To provide a tripod type constant velocity universal joint with a less vibration which can reduce a caused thrust generated at the transmission time of a rotary torque more, while an outside joint member and a tripod member take an operation angle. SOLUTION: The outer periphery surface 3b of an outside roller 3 is composed of a first surface 3b1 with the projected spherical shape of both ends and a second surface 3b2 with the cylindrical shape of the center part held by the first surface 3b1. As the first surface 3b1 is angular-contacted by the contact angle ϕ to the surface 2a1 of the roller guide surface 2a, the inclination of the outside roller 3 (front/rear direction inclination) in the vertical section direction of the outside joint member 1 is restrained. Simultaneously, as the cylindrical second surface 3b2 is contacted to the flat surface 2a2 of the roller guide surface 2a, the inclination of the outside roller 3 (right/left direction inclination) in the cross section direction of the outside joint member 1 is restrained.

9. 发明专利

JP2000154830A CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JP2000154830A
公开(公告)日：2000-06-06
申请号：JP32716398
申请日：1998-11-17
申请人： NTN TOYO BEARING CO LTD
发明人： SUGIYAMA TATSURO , GOTOU TATSUHIRO , TERADA KENJI , KURA HISAAKI
IPC分类号： F16D3/205
摘要： PROBLEM TO BE SOLVED: To provide a tripod type constant velocity universal joint with a less vibration which can reduce a caused thrust generated at the transmission time of a rotary torque mush more, while an outside joint member and a tripod member take an operation angle. SOLUTION: The outer periphery surface 3b of an outside roller 3 is formed spherically. A roller guide surface 2a has a surface 2a1 with an arc shape section contacting to the outer periphery 3b of the outside roller and an outward shoulder surface 12 contacting to the end 3c of the leg shaft 5 tip side of the outside roller. As the outer periphery 3b of the outside roller is angular- contacted by a contact angle ϕ with the surface 2a1 of the roller guide surface 2a, the inclination of the right/left direction for the roller guide surface 2a of the outside roller (the cross section direction of outside joint member 1) is restrained. Simultaneously, as the end 3c of the leg shaft tip side of the outside roller is guided by the shoulder 12 of the roller guide surface 2a, the inclination of the front/rear direction for the roller guide surface 2a of the outside roller (the vertical section direction of outside joint member 1) is restrained.

10. 发明专利

JPH10238552A TRIPOD TYPE CONSTANT VELOCITY UNIVERSAL JOINT 失效
公开(公告)号：JPH10238552A
公开(公告)日：1998-09-08
申请号：JP2281397
申请日：1997-02-05
申请人： NTN TOYO BEARING CO LTD
发明人： OZAWA HITOHIRO , GOTOU TATSUHIRO , SAITO TAKESHI
IPC分类号： F16D3/20 , F16D3/205
摘要： PROBLEM TO BE SOLVED: To reduce the generation of induced thrust when torque is transmitted in a state that a joint is brought into an operation angle. SOLUTION: The outer peripheral surface (m) of the leg stem 5 of a tripod member 4 forms a spherical peripheral surface having a center P of the axis of the leg stem 5, and the cylinder inner peripheral surface (n) of a roller (7) is fitted in externally of a spherical outer peripheral surface (m) through a roller bearing 6. When, in a state that a joint is brought into a working angle θ, torque is transmitted, the roller 7 is tolled over a roller guide surface 3 with an attitude paralleling the axis of an outer ring 1 maintained in a way that smooth relative movement to the cylinder inner peripheral surface (n) of the roller 7 is effected as the spherical outer peripheral surface (m) of the leg stem 5 is rotated centering around the center P thereof, and smooth relative movement in the direction of the axis of an outer ring. This constitution reduces the generation of induced thrust.

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