Construction and working:
• In
this type Stub axles are connected to the rigid front axle on either side by
means of King
pins
• The
drop arm is rigidly connected to the cross shaft of the steering gear at its
upper end
• The
other end of the link rod arm is rigidly attached to the stub axle, on which
the wheel is
mounted
• Each
stub axle has a forged track rod arm rigidly bolted to the wheel axis
• The
other ends of the track rod arms are connected to the track rod by means of
ball joints
• The
design of ball joints is such that the expanding spring compensates for wear or
misadjustments
• An
adjuster is also provided in the track rod to change its length for adjusting
wheel
alignment
• The
steering gear provides mechanical advantage so that only a small effort is
required at
the steering wheel to apply a much larger force to the steering
linkage.
• It
also provides desired velocity ratio so that much smaller movement of the stub
axle is
obtained with large angular movement of the steering wheel.
• When
the steering wheel is turned, the swinging action of the drop arm imparts a
near
linear movement to the link rod
• This
movement is transmitted through the link rod arm to the stub axle so as to turn
the
stub axle about its pivot, which may be a king pin or ball joints
• The
other wheel is steered through the track rod
• Thus
only one wheel is positively steered
Applications:
Used
in Heavy vehicles such as
• Passenger
Bus
• Lorry
• Trucks
etc.,
Rigid Axle
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