Clutch disconnection/connection device

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Now, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG.
1 is a drawing showing the whole structure of a clutch disconnection/connection device of the present invention.
The clutch disconnection/connection device 1 includes an air pressure supply means 2 for supplying air pressure.
The air pressure supply means 2 includes a compressor 3 that is driven by an engine(not shown) for generating air pressure, an air drier 4 for drying the air from the compressor 3, an air tank 5 for reservoiring the air from the air drier 4, and a check valve 6 provided on the entrance side of the airtank 5.
The air pressure from the air pressure supply means 2 is distributed to a clutch booster 7 and the clutch booster 7 operatively moves a friction clutch 8 to the disconnection side(to the right-hand side in FIG.
1) due to the supplied air pressure.
An hydraulic pressure is also supplied to the clutch booster 7 from a master cylinder 10, as described below in details.
FIG.
2 is a detailed vertically sectional view of the clutch booster 7.
This clutch booster 7 is constructed similar to the conventional model.
As shown in FIG.
2, the clutch booster 7 includes a cylinder shell 12 connected to its body 11.
Inside the cylinder shell 12, a piston plate(a power piston) 13 is provided such that it 13 is biased by a return spring 14 toward the air pressure introduction side(to the left in FIG.
2).
An air pressure nipple 15 is mounted at one end of the cylinder shell 12.
The air pressure nipple 15 forms an opening for introducing air pressure from the air tank 5 by way of an air pressure path 35(Refer to FIG.
1).
When air pressure is introduced through the air pressure nipple 15, the piston plate 13 is pushed to the right in the drawing.
The piston plate 13 then pushes a piston rod 16, a hydraulic piston 17 and a push rod 18, for pushing the clutch lever 8a (Refer to FIG.
1) to the disconnection side A and disconnecting the friction clutch 8