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1. 发明专利

JPH11303911A CLUTCH PLATE AND ELECTROMAGNETIC FRICTION CLUTCH USING IT 失效
公开(公告)号：JPH11303911A
公开(公告)日：1999-11-02
申请号：JP10502398
申请日：1998-04-15
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP , TOPRE CORP
发明人： SAKAI NAOYUKI , KOKUBO NAOYUKI , SUZUKI KOICHI , IKEDA AKIHIKO , SUGAMATA KOICHI
IPC分类号： F16D13/52 , F16D13/62 , F16D27/115 , F16D65/12 , F16D69/00
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a torque fluctuation due to the interference of partition sections when a friction clutch is operated by forming multiple circular arc-shaped through holes extending in the peripheral direction at prescribed intervals on the same circumference, and forming a lubrication groove at all portions except for the partition sections of the circular arc-shaped through holes on a friction coupling face. SOLUTION: The circular arc-shaped through holes 14a3 of an outer clutch plate 14a are partitioned by partition sections 14a5 at prescribed intervals on the same circumference. A lubrication groove 14a4 is formed at all portions of the friction coupling face of a plate main body 14a1 except for the partition sections 14a5 of the plate main body 14a1 by press machining on the surface. When the lubrication groove 14a4 is formed, the portions other than the partition sections 14a5 are relatively built up, the partition sections 14a5 difficult to polish are recessed as compared with the other portions, thereby the partition sections 14a5 can be prevented from being protruded from the friction coupling face after the surface of the outer clutch plate 14a is polished.

2. 发明专利

JPH02199328A POWER TRANSMISSION MECHANISM 失效
公开(公告)号：JPH02199328A
公开(公告)日：1990-08-07
申请号：JP1568489
申请日：1989-01-25
申请人： TOYOTA MOTOR CORP , TOYODA MACHINE WORKS LTD
发明人： INUI MASAKI , SAKAI TOSHIBUMI , SAKAI NAOYUKI
IPC分类号： F16D43/284
摘要： PURPOSE:To prevent unstable states such as lowering of torque transmission characteristics by providing, on the inner circumference of the outer rotation member, a circular groove and a plurality of recesses which open at a sliding part with the outer circumference of a working piston. CONSTITUTION:When fine powder is generated in a fluid chamber due to abrasion at relative rotation between a working piston 13 and retainer 15 and a rotor 14, the fine powder invades into the outer circumference 13d of the working piston 13 and the inner circumferential surface of an outer case 11 through a micro gap between a circular outer edge surface 13c of the working piston 13 and a side surface 15b of the retainer 15 because of action of centrifugal force, but after that, it soon moves to the bottom part in a circular groove 11e and accumulates. Therefore, sliding resistance of the working piston 13 is neither increased nor fluctuated by such fine powder, and pressurizing force of the working piston 13 to a frictional clutch 10b is not affected at all. Accordingly, unstable states such as lowering of torque transmission between both shafts 25 and 26 are not generated.

3. 发明专利

JP2000230577A MAGNETIC PATH FORMING MEMBER OF ELECTROMAGNETIC CLUTCH 失效
公开(公告)号：JP2000230577A
公开(公告)日：2000-08-22
申请号：JP3460299
申请日：1999-02-12
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , SUZUKI KOICHI , IKEDA AKIHIKO
IPC分类号： F16D27/112
摘要： PROBLEM TO BE SOLVED: To inhibit influence on a clutch characteristic and a clutch responsiveness of an electromagnetic clutch caused by an air gap by making the air gap between a friction clutch abutting surface of a rear cover 11b, i.e., a magnetic path forming member of the electromagnetic clutch and a clutch plate smaller. SOLUTION: A rear cover 11b, i.e., a magnetic path forming member is constituted of bodies 11b1, 11b2 made of a magnetic substance, and a cylindrical body 11b3 made of a nonmagnetic substance which is engaged and welded to the bodies 11b1, 11b2 at a radially intermediate portion. A welded portion 11f at the tip end at a friction clutch side with respect to the bodies 11b1, 11b2 of the cylindrical body 11b3 is positioned at a position, where it is retreated from an abutting surface 11d of the bodies 11b1, 11b2. The welded portion 11f is not involved with a friction clutch abutting surface.

4. 发明专利

JPH11294488A CLUTCH PLATE AND DRIVING FORCE TRANSMISSION DEVICE USING IT 失效
公开(公告)号：JPH11294488A
公开(公告)日：1999-10-26
申请号：JP9359098
申请日：1998-04-06
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , SUZUKI KUNIHIKO , KOKUBO NAOYUKI , HOSOKAWA TAKASHI , SUZUKI KOICHI , IKEDA AKIHIKO , OBA MITSURU
IPC分类号： B60K17/34 , F16D13/62 , F16D27/115 , F16D65/12
摘要： PROBLEM TO BE SOLVED: To improve torque transmission characteristic and durability of a driving force transmission device by providing many fine projecting streaks extending in the circumferential direction in parallel while holding fine spaces on a frictional engaging face. SOLUTION: A friction clutch of this driving force transmission device is a wet multiple disc type, respective inner clutch plates 14a and respective outer clutch plates are alternately positioned, and they are contacted with each other and frictionally engaged. The inner clutch plate 14a is provided with many projecting streaks 14a4 in parallel on the whole surface of the frictional engaging face of a plate main body 14a1 while holding fine spaces. The projecting streaks 14a4 are extended in the circumferential direction and concentrically arranged in parallel with each other. Hereby, in this driving force transmission device, torque transmission characteristic is improved, judder resistance and responsiveness are favorable, drag torque due to viscosity of oil film is reduced, and hence durability is improved.

5. 发明专利

JPH10211825A DRIVE FORCE TRANSMITTING DEVICE 失效
公开(公告)号：JPH10211825A
公开(公告)日：1998-08-11
申请号：JP1692997
申请日：1997-01-30
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , CHIGA YOSHIAKI , ASHIDA SATOSHI
IPC分类号： B60K17/34 , F16D25/0638
摘要： PROBLEM TO BE SOLVED: To provide a drive force transmitting device obtaining a high torque characteristic in the beginning of generation of differential rotation thereafter a prescribed reduced torque characteristic. SOLUTION: A rotor constituting a friction engaging force generating mechanism is formed in a shape generating a high fluid pressure in a first partitioning chamber r1 in a side of a working piston 15 in a receiving chamber receiving a viscous fluid, to be movably assembled in an axial direction in an inner shaft 10b and spring energized, in the rotor 16, a passage hole 16e is formed, where viscous fluid in a second partitioning chamber r2 is allowed to flow in the first partitioning chamber r1. In this way, in the first partitioning chamber r1, a high fluid pressure is generated, in the beginning of generation of differential rotation, the working piston 15 is pressed by high pressing force, a friction clutch is friction engaged, thereafter viscous fluid in the second partitioning chamber r2 is allowed to flow in the first partitioning chamber r1, a fluid pressure therein is reduced to a prescribed pressure, by the reduced fluid pressure, the working piston 15 is pressed, the friction clutch is friction engaged.

6. 发明专利

JP2001132777A ELECTROMAGNETIC CLUTCH AND DRIVING FORCE TRANSMISSION DEVICE USING THE CLUTCH 失效
公开(公告)号：JP2001132777A
公开(公告)日：2001-05-18
申请号：JP31391099
申请日：1999-11-04
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , KUSHINO HIROSHI , IKEDA AKIHIKO , OBA MITSURU
IPC分类号： F16D27/115
摘要： PROBLEM TO BE SOLVED: To suppress fluctuations of the clutch characteristics of an electromagnetic clutch and prevent the generation of noise by decreasing the fluctuation width of a repetition fluctuation of a carried current during duty control of an energizing current to the electromagnetic coil of an electromagnetic clutch. SOLUTION: A copper ring 18 which is a nonmagnetic and high conductive member is disposed in the vicinity of the circulation magnetic circuit X of an electromagnetic clutch. By disposing the copper ring 18, a counter electromotive voltage due to a fluctuation of the number of magnetic fluxes is generated and a reverse direction current in a direction reverse to the current fluctuation of an electromagnetic coil is generated. The reverse current is operated to offset a fluctuation of an energizing current, resulting in reduction of the fluctuation width of the repeat fluctuation of the carried current, maintenance of the engaging force of the electromagnetic clutch in a state reduced in a fluctuation width, and reduction of the generation of noise due to the repeating fluctuations of the engaging force.

7. 发明专利

JPH11303898A DRIVE FORCE TRANSMITTING DEVICE 失效
公开(公告)号：JPH11303898A
公开(公告)日：1999-11-02
申请号：JP10762498
申请日：1998-04-17
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , OSAWA YOSHIKI , SUZUKI KOICHI , IKEDA AKIHIKO
IPC分类号： B60K17/34 , F16D27/115
摘要： PROBLEM TO BE SOLVED: To restrain occurrence of a hump condition of a main clutch so as to prevent the main clutch from being worn and damaged during movement by a wrecker vehicle mounted with a drive force transmitting device for actuating the main clutch by means of a pilot clutch mechanism. SOLUTION: A front housing 1 which is an outer rotary member is made of a material having a large degree of thermal expansion and a small degree of rigidity so as to restrain affection upon the frictional engagement between a main clutch 10c, and accordingly, the time by which the main clutch 10c restrains abnormal, frictional engagement of the main clutch 10c caused by elastic deformation of the housing 11a, thereby it is possible to prevent friction and damage of the main clutch 10c.

8. 发明专利

JPH11287258A ELECTROMAGNETIC FRICTION CLUTCH 失效
公开(公告)号：JPH11287258A
公开(公告)日：1999-10-19
申请号：JP8894898
申请日：1998-04-01
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , SUZUKI KOICHI , IKEDA AKIHIKO , OBA MITSURU
IPC分类号： F16D27/115
摘要： PROBLEM TO BE SOLVED: To make improvements in the torque transfer characteristic and durability of an electromagnetic friction clutch. SOLUTION: A nitrogen diffused layer is adopted at the surface side of an iron base material consisting of applying a NITROTEC (R) process as an inner clutch plate 14a, a nitrogenous compound layer at the surface side of this nitrogen diffused layer and a clutch plate of a multilayer structure with an oxide film at the surface side of this nitrogenous compound layer, respectively. With a synergistic effect of its anticorrosiveness, wear resistance and fatigue resistance, the promotion of mirror finishedness on each frictional engaging surface of both clutch plates 14a and 14b is checked, and thus any drop in a torque transfer characteristic is prevented from occurring.

9. 发明专利

JPH11153157A DRIVING FORCE TRANSMISSION DEVICE 失效
公开(公告)号：JPH11153157A
公开(公告)日：1999-06-08
申请号：JP32151397
申请日：1997-11-21
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , SUZUKI KOICHI , IKEDA AKIHIKO , OBA MITSURU
IPC分类号： F16D27/115
摘要： PROBLEM TO BE SOLVED: To restrain influence exerted on magnetic permeability of a welding portion on a magnetic path forming member on a driving force transmission device to make an outer case and an inner shaft in a connecting state free to transmit torque by frictionally engaging with a friction clutch by an electromagnetic control means. SOLUTION: A rotary member 10a is constituted of a front housing 11a and a rear housing 11b to be screwed on an rear end opening part of the front housing 11a and to cover it, and width of a welding portion exerting influence on magnetic permeability is reduced by connecting a main body part 11b1 made of a magnetic material of the rear housing 11b which is a magnetic path forming member and a ring part 11b2 made of a non-magnetic material by electronic beam welding.

10. 发明专利

JPH06249268A DRIVING FORCE TRANSMITTING DEVICE 失效
公开(公告)号：JPH06249268A
公开(公告)日：1994-09-06
申请号：JP3695493
申请日：1993-02-25
申请人： TOYODA MACHINE WORKS LTD , TOYOTA MOTOR CORP
发明人： SAKAI NAOYUKI , OKAMOTO MASATO
IPC分类号： F16D43/284
摘要： PURPOSE:To improve stack escaping ability by applying compressive force on a clutch utilizing thermal expansion of a multiple disk clutch, and raising torque. CONSTITUTION:An inner cylindrical hollow chamber 26 is formed in a front housing, and the opening end of the hollow chamber 26 is blockaded with a rear housing 27. A piston 24 is slidably received in the hollow chamber 26 so as to define a space part 28 between the rear housing 27 and itself. A multiple disk clutch 25 is arranged in a clutch chamber 29 formed between the bottom face of the front housing 21 and the piston 24, in the hollow chamber 26. A disc-like rotary member 33 is received between the end wall of the piston 24 and the end wall of the rear housing 27 capably of being slidably contacted. Between the bottom face of the front housing 21 and the piston 24 in the condition of being joined with the rear housing 27, it is set that a little initial clearance Cl is generated on the side of the multiple disk clutch 25 in the condition of clutch-in.

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