192 clutches and power-stop control – Clutches – Operators
Patent
1998-03-25
1999-12-14
Lorence, Richard M.
192 clutches and power-stop control
Clutches
Operators
192 85AA, F16D 250635
Patent
active
060005181
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention is directed to a medium actuated clutch in which a slight leakage of hydraulic medium is arranged out of a pressurized chamber space to allow rapid disengagement of the clutch and circulation of pressurized oil.
BACKGROUND OF THE INVENTION
Previously known from U.S. Published Patent Application No. B382,290 is a medium actuated clutch where the rotation-transmitting clutch disc and a mobile pressure plate are in a chamber containing the medium. The chamber is divided into many sub-chambers by the disc and the plate and by means of pressure variations, the pressure plate can be put into motion and the disc and plate surfaces in abutment against each other to carry out clutching.
Such a clutch is applicable to cars with automatic transmission with the clutch thereby in the gearbox. In the gearbox there is oil to operate the clutch and possible oil leakage is of no harm if the leaking oil is flowing directly back into the gearbox. However, a clutch of this kind is not very well fitted for general cases, for instance as a common shaft clutch and, of course, not as a dry clutch in vehicles.
SUMMARY OF THE INVENTION
A clutch as per this invention offers a new disc clutch assembly.
The most significant advantages of the invention can be considered that the thrust bearing can be omitted. It is not needed either with the clutch engaged or disengaged, since the disc shaft needs no support against axial forces. The clutch works with medium of low pressure and shaft packings are needed only to prevent leakage of low pressure medium leaving the clutch, lower than working pressure. The clutch body still rotates all the time along with the shaft and the packings are not exposed to wear and tear. The clutch is interconnected with a combustion engine such that driving oil can be conveyed from the lubricating oil pump, and the return oil is easily conveyed along the clutch shaft to the crankshaft and the crankcase.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the invention is disclosed with reference the enclosed drawing, where
FIG. 1 is a cross-sectional side view of the clutch;
FIG. 2 is a cross-sectional side view of another clutch; and
FIG. 3 is a cross-sectional view of a clutch interconnected with a combustion engine.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 the clutch shaft 1 is shown as an actuating shaft from which the rotating motion is transmitted by means of the clutch to belt pulley 20. The belt pulley 20 is fastened with bearings to rotate with respect to the shaft 1 by means of a ball bearing 12. The belt pulley 20 has clutch linings 9 on both power transmitting sides. On engaging the clutch, the belt pulley is pressed between flange 8 and body 10 for power transmission to the belt pulley. Clutch body 10 built about shaft 1 contains a cylindrical inner chamber, which is divided into two chambers by a disc 13 in the cylinder. Disc 13 is secured to the shaft surface so that it cannot slide, at least not past holder 14. The clutch body rotates always along with shaft 1. This is arranged by rolls 11 in the shaft splines, which have semi-splines in the the clutch body 10. Shaft 1 and clutch body 10 are interconnected by a bronze ring 3, which has a sliding fit with regard to shaft 1. One end of clutch body 10 can be opened and fitted with a shaft packing 2.
Channels are drilled in shaft 1 for the medium, for instance 16 and return oil 17. Pressurized oil is conveyed to chamber 22 and chamber 23 and the adjacent areas of shaft packing 2 are connected to return channel 17. Shaft channels 16 and 17 are connected to a connection piece 6 arranged about shaft 1 and furnished with connections 4 and 5 for both channels.
To engage the clutch the pressure is steered to channel 16 and further to chamber 22. Since due to holder 14 disc 13 cannot move, body 10 moves towards the belt pulley and due to pressure in chamber 22 the body remains in position pressing the belt pulley 20 against flange 8 in order to sustain the connection. Belt pulley 20
REFERENCES:
patent: 2945574 (1960-07-01), Plume
patent: 3202018 (1965-08-01), Hilpert
patent: 3324983 (1967-06-01), Snoy et al.
patent: 3373853 (1968-03-01), Aschauer
patent: 3924717 (1975-12-01), Ookubo et al.
patent: 4223774 (1980-09-01), Sommer
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