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Electric steering device controls power transmitting to steering mechanism from
steering motor by electric signal. Thus the truck has higher efficiency because hydraulic
oil is not used as transmission medium. Meanwhile, the steering sensor has moment
feedback function. The electric steering device will feed moment back according to truck
travel speed, steering resistance and steering wheel rotation speed to ensure that the truck
is safer and the operation is more comfortable.
3.3 Composition of Steering System
(1) Steering operation mechanism
Figure 3-1 Steering unit
(1) Steering column (2) Steering wheel (3) Coupling shaft (4) Return spring
(5) Dashboard (6) steering sensor (7) lock handle
The operation mechanism of the truck mainly consists of steering wheel, tubular
column, coupling, steering gear and mounting support etc (as shown in Fig.3-1). They are
fixed on the instrument panel by mounting support, steering wheel, tubular column and
coupling are connected together. The steering gear is fixed at the lower end of coupling
and the rotation of steering wheel will bring along the steering gear. Adjustment of
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