Crank and Slotted Link Mechanism

Crank and
Slotted Link
Mechanism

In
crank and slotted link mechanism Fig. the pinion receives its motion
from an individual motor or overhead line shaft and transmits the motion or
power to the bull gear. Bull gear is
a large gear mounted within the column. Speed of the bull gear may be changed
by different combination of gearing or by simply shifting the belt on the step
cone pulley. A radial slide is bolted
to the centre of the bull gear. This
radial slide carries a sliding block 
into which the crank pin is fitted. Rotation of the bull gear will cause
the bush pin to revolve at a uniform speed. Sliding block, which is mounted
upon the crank pin is fitted within the slotted
link. This slotted link is also known as the rocker arm. It is pivoted at its
bottom end attached to the frame of
the column. The upper end of the rocker arm is forked and connected to the ram block by a pin. With the rotation of bull gear,
crank pin will rotate on the crank 
pin circle, and simultaneously move up and down the slot in the slotted
link giving it a rocking movement, which is communicated to the ram. Thus the
rotary motion of the bull gear is converted
to reciprocating motion of the ram.


Crank and slotted link mechanism
Crank and slotted link mechanism


Leave a Comment