Centrifugal clutch
Construction:
Centrifugal clutch is working on the centrifugal force, instead of spring force for keeping it in engaged position. The clutch is operated automatically depending upon the engine speed. The clutch is usually in disengaged position. The clutch gets engaged as engine speed increases.
It mainly consists of a flywheel, pressure plate, clutch disc etc. In clutch cover assembly 3 set of bell crank lever is fitted to pressure plate there is a pressure spring. Between flywheel and clutch disc the clutch disc return spring is fitted.
Working:
In clutch disengaged position, the return
spring separates the clutch disc from flywheel. When the speed increases the
weight flies there by operating bell crank lever which presses the pressure
plate. This pressure plate force is transmitted to the clutch plate by means of
spring in the pressure plate. The clutch plate containing friction lining is
thus pressed against the flywheel. Now the clutch will be in engaged position.
The power is transmitted to the gearbox.
The spring serves to keep the clutch
is disengaged position at low speed eg: 500rpm. The stop helps to limits the
amount of centrifugal force. In mopeds and light weight motor vehicles, in
order to simplify riding, automatic centrifugal clutches are used.
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