Types
of Transmission Shafts
Transmission shafts are
found in a manual transmission gearbox. The transmission gearbox transfer the
high output of an engine of the automobile to the wheels. This process helps to
reduce it to a compatible speed. The gearbox does this through a complex
arrangement of gears and shafts.
Input
Shaft
The engine crankshaft
of the automobile turns and creates power. The mechanical energy first goes
through the transmission gearbox and then reaches the wheels. The first
component to get this energy is the input shaft.
In a rear-wheel drive
car, the input shaft is designed to lie along the same line as the output
shaft, forming what seems like a singular component that is sometimes called a
main shaft.
Counter
Shaft
The counter shaft is
placed parallel to the main shaft and is run by the input shaft through a
pinion gear. In the manual transmission design, the gears are attached to the
counter shaft permanently. In cars with front-wheel-drive, the input and
counter shafts is actually the same thing. The counter shaft is also called a
lay shaft.
Output
Shaft
The output shaft is the
final component that carries the power out of the transmission gearbox and on
to the wheels. A set of transmission gears are placed parallel to those that is on the counter shaft and arranged
along the output shaft. Both output and counter shaft gears are meshed but the
output shaft gears are not permanently attached to it. These are the gears that
are shifted manually by the driver. The gear selected is fastened and rotates
the output shaft along with it, while the others rotate freely until another
one is selected.
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