192 clutches and power-stop control – Clutches – Operators
Patent
1989-04-06
1990-08-21
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
192 7027, F16D 1344, F16D 1900
Patent
active
049498290
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a clutch cover assembly in which a main diaphragm spring (abbreviated merely to a diaphragm spring hereinunder) and a sub diaphragm spring (abbreviated merely to a coned disc spring hereinunder) are installed for serving as a diaphragm spring mechanism, and especially to a supporting mechanism of the coned disc spring.
BACKGROUND ART
The clutch cover assembly of the foregoing type has been described in Published Utility Model Application No. 58-157030 applied for patent by the applicant of this invention. In that structure, a large-size main diaphragm spring (abbreviated merely to a diaphragm spring hereinunder) connected to a pressure plate and a sub diaphragm spring (abbreviated merely to a coned disc spring hereinunder) are installed in a diaphragm spring mechanism.
A general diaphragm spring has a characteristic that a deflection load increases when a deflection amount decreases from some value to a specified value and the deflection load decreases when the deflection amount decreases further.
For this reason, in a general structure in which only the diaphragm spring is used as the diaphragm spring mechanism, when the friction facing is worn out, a deflection load of the diaphragm spring increases with a decrease in a deflection amount of the diaphragm spring at the time of clutch engagement. As the result, an urging force effected from the diaphragm spring on a pressure plate increases so that a required treading force of a clutch pedal increases too.
On the contrary, in the structure of the foregoing application, the deflection load of the coned disc spring varies so as to counteract the increase in the load of diaphragm spring. As the result, the urging force effected from the diaphragm spring on the pressure plate is maintained at approximately a constant value so that the required treading force of the clutch pedal is also maintained at an approximately constant value.
However, the coned disc spring is not locked in its rotating direction in the structure of the foregoing application, so that the coned disc spring would rotate in relation to other members to cause an emission of abnormal sound under a state where the deflection load is not applied on the coned disc spring, i.e. under a clutch disengaged state. Further, since the coned disc spring is not supported in its axial direction, some axial play would be produced so that the coned disc spring would vibrate in its axial direction to cause the emission of abnormal sound.
DISCLOSURE OF INVENTION
In order to solve the above-mentioned troubles in this invention, an outer peripheral edge of a diaphragm spring is pressed on a pressure plate, an inner peripheral edge thereof is connected to a release bearing mechanism, a disc-like annular coned disc spring is disposed at an axial one-side of the diaphragm spring, the coned disc spring is secured to a clutch cover in such a manner that circumferential plural places of the coned disc spring are provided so as not to leave any play relatively to projecting portions of the clutch cover at least in its axial or circumferential direction, the coned disc spring is so installed that an outer peripheral edge or an inner periperal edge thereof contacts with the diaphragm spring to urge the diaphragm spring in a direction to disengage a clutch at a time when the clutch is engaged, a radial intermediate point of the diaphragm spring is supported by the clutch cover through means of a fulcrum mechanism.
Further, the present invention can control abnormal sounds generated by at least axial or circumferential vibration of the coned disc spring.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a vertical sectional partial view of an embodiment.
FIG. 2 is a partial plane view of a coned disc spring of FIG. 1.
FIG. 3 is a deflection/load characteristic curves of a diaphragm spring and the coned disc spring.
FIGS. 4 & 5 are schematic sectional partial views showing alternate structures of the embodiment of FIG. 1., respectively.
FIG. 6 is a vertical sectional partial view of
REFERENCES:
patent: 3739896 (1973-06-01), Shono
patent: 3785466 (1974-01-01), Murai et al.
patent: 3811544 (1974-05-01), Maucher
patent: 3963105 (1976-06-01), Ernst et al.
patent: 3977504 (1976-08-01), Kajitani
patent: 4069905 (1978-01-01), DeGennes
patent: 4195719 (1980-04-01), Martinez
patent: 4602708 (1986-07-01), Nagano
patent: 4641736 (1987-02-01), Forster
Hashimoto Yasuyuki
Minakami Hiroshi
Murata Ikuo
Okubo Mamoru
Takeuchi Hiroshi
Bonck Rodney H.
Kabushiki Kaisha Daikin Seisakusho
Whitelaw Nicholas
LandOfFree
Clutch cover assembly with annular coned disc spring does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Clutch cover assembly with annular coned disc spring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clutch cover assembly with annular coned disc spring will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1670984