192 clutches and power-stop control – Clutches – Operators
Patent
1989-02-06
1990-05-29
Herrmann, Allan D.
192 clutches and power-stop control
Clutches
Operators
464 68, F16D 314
Patent
active
049288059
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a damper disk which may be used as clutch disks in clutches for automobiles, and particularly to a damper disk including two kinds of friction mechanism.
(2)Description of the Prior Art
The Japanese UtilitY Model Application No.59-200754 (Laid-Open Publication No.61-114130) commonly assigned to has disclosed a damper disk of a type mentioned above. In the structure disclosed in the above application, a pair of side plates, which are input members, are disposed at opposite sides of a flange of a hub, i.e., an output member, with first friction mechanisms therebetween. A pair of sub-plates are also arranged around the hub with said side plates and the flange therebetween, and second friction mechanisms are disposed between the sub-plates and side plates, respectively. In twisting motion, i.e., in relative rotating motion between the side plates and the flange during torque transmitting operation, sliding, which causes a small frictional force, is generated on the first friction mechanisms when the torsion angle or relative rotation angle is small, and sliding, which causes a large frictional force, is generated on the second friction mechanism, when the torsion angle is large.
The above structure, in which the frictional forces, and thus hysteresis torques in damping characteristics, change in accordance with the torsion angle, the torque vibration can effectively be absorbed through the entire extent of change of the transmitted torque, i.e., of torsion angle.
However, in the above known structure, a pair of the sub-plates are connected together by stud pins extending in an axial direction of the disk so as to apply a large compression force against the second friction mechanisms. Further, a pair of the side plates are supported bY sub-pins to maintain a predetermined space therebetween so that the compression force applied to the second friction mechanisms may not be applied through the side plates to the first friction mechanisms, and thus the frictional force on the first friction mechanisms may be maintained small.
This structure requires a pluralitY of the sub-pins in addition to the stud pins, and also requires apertures formed in the side plates, the flange and the first friction mechanisms for passing the sub-pins therethrough. The structure is therefore complicated and manufacturing process is also complicated.
SUMMARY OF THE INVENTION
Accordingly, the present invention provides a damper disk, overcoming the above-noted problems, which comprises a hub provided with a flange, which is an output member; a pair of annular side plates, which are input members and are disposed at opposite sides of said flange; springs disposed in openings in said side plates and said flange for circumferentially connecting said side plates to said flange; a pair of annular sub-plates disposed around said hub with said side plates and said flange therebetween; first friction mechanisms disposed radiallY inside said openings and between said side plates and said flange, respectivelY; second friction mechanisms disposed between said side plates and said adjacent sub-plates, respectively, said second friction mechanisms being adapted to cause a frictional force by relative rotation between said side plates and sub-plates which is larger than the frictional force caused on said first friction mechanisms by relative rotation between said side plates and said flange; stud pins extending in an axial direction of the disk and rigidly connecting said both of the sub-plates together; stop mechanism for preventing relative rotation between said flange and said sub-plates over a predetermined angle; and bent portions formed at radially inner edges of said openings in one of said side plates and extending axiallY toward the other of said side plates, said bent portions passing though said openings in said flange and axially contacting said other side plate.
According to the above structure, when the side plates rotates or twists relatively to
REFERENCES:
patent: 2276416 (1942-03-01), Nutt
patent: 3974903 (1976-08-01), de Gennes
patent: 3995726 (1976-12-01), Degennes
patent: 4270644 (1981-06-01), Billet
patent: 4485907 (1984-12-01), Nishimura
Takeuchi Hiroshi
Yoshimura Yoshinari
Herrmann Allan D.
Kabushiki Kaisha Daikin Seisakusho
Whitelaw Nicholas
LandOfFree
Friction device in a damper disk does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Friction device in a damper disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Friction device in a damper disk will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-515071