Transmission Mechanism; Path Of Power Transmission; Belt Automatic Continuous Variable Transmission - TGB Hornet 50 Service Manual

3-3 TRANSMISSION MECHANISM

3-3-1 Path of Power Transmission:

The torque of Crank-Shaft from Drive Face to Belt ¡ ÷ Driven Face ¡ ÷ Clutch Shoe ¡ ÷
Clutch Housing ¡ ÷ Drive Shaft, through Idle Gear in Mission Chamber ¡ ÷
Turning Speed
reduced by Final-Gear and Power transmitted to Rear-Axle Shaft to move Rear Wheel.

3-3-2 Belt Automatic Continuous Variable Transmission:

The Transmission is the combination of automatic centrifugal clutch and V-Belt
continuous variable transmission, which makes the Pulley of both Drive Ends and Driven
Ends move toward the shaft center to alter V-Belt contact pitch circle to change the
transmission ratio automatically. Due to the increasing revolution speed of Engine, the pitch
circle on the Drive Pulley is enlarged by centrifugal force and pushed out of the Belt to
lengthen the radius of pitch circle. The Belt at Driven Pulley Face is forced to move to the
center of shaft to decrease the radius of pitch circle, and pushed by the spring to transfer the
power. The transmission ratio is
therefore altered by the alteration of pitch circle's radius.
30