Types
of gears and shafts:
The
four important type of gears are spur gears, helical gears, bevel gears, worm
gears. Among this, spur gear is the most commonly used gear type in which the
teeth are straight and parallel to shaft. In helical gear, teeth are twisted
and slanting to the gear axis. Bevel gear has the axes of two shafts intersect and the tooth of the gears are
conically shaped. The teeth of the worm gear is cut on an angle to be driven by
a worm. Shafts
are classified mainly into two types namely transmission shaft and machine
shaft. Counter shafts and line shafts are some of the transmission shafts while
crankshaft is a machine shaft.
Requirements
of gears and shafts:
•
They must be completely rust proof.
•
Precise design must be ensured for a fine finish.
•
They should be easy to fix.
•
Strength and stiffness should be mainly considered during the
design of gears and shafts.
A
gear is a rotating, toothed machine which engages with another toothed gear to
change the speed and direction of the power source. This cylindrical wheel
transfers mechanical power from one rotating shaft to another. When two
different sized gears are involved, the smaller gear will rotate faster than
the larger one for better performance. In order to achieve the specified speed
in an automobile, gear has to be adjusted.
A
shaft is a cylindrical rotating rod used for transmitting the power in a
machine. It basically delivers the power from the engine to other parts of the
automobile before reaching the wheels. Generally, shaft is made up of mild
steel or alloy steel. The gear is mounted on the shaft at required position.
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