The automotive vehicle suspension system frame (or Unibody) and axle (or wheel)
power transmission connection between all devices in general. Its function is to act on
the road wheels on the vertical force (support force), the vertical reaction force
(traction and braking) and lateral reaction force and the torque reaction force caused
by the transfer to the frame (or Unibody) on, in order to ensure the normal running car.
Therefore, the suspension system performance and quality performance for the
vehicle plays an important role. This paper suspension systems for passenger cars and
trucks in the widely used leaf spring design calculation method for the in-depth
analysis and research.
The article on the current variety of automotive leaf spring design calculation
method of intensive analysis and research, summed up the characteristics of various
calculation methods, limitations and application. Automotive leaf spring from the
elastic component in addition to the role, but also and play the guiding role, and
multi-chip friction between the spring damping system also played. As the leaf spring
structure is simple, use and maintenance, and easy maintenance, long leaf springs are
widely used in the car. Usually the new car design, according to the layout of a given
space vehicle, axle load full load minus the estimated quality of non-sprung mass,
obtained in each pair of spring bearing on the quality. Generally before the rear axle,
wheels, brake drums and steering knuckle, transmission shaft, steering assembly, such
as non-vertical rod sprung mass. If the layout of the axle above the leaf spring, spring
3 / 4 the quality of the non-sprung mass, the next set spring, 1 / 4 non-sprung mass
spring mass models based on different requirements, general arrangement is given by
the straight length of spring control size.
In the arrangement possible, try to increase the length of the spring, mainly to
consider the following reasons. As the spring stiffness and is inversely proportional to
the cube of the length of the spring, so from the perspective of improving vehicle ride
comfort, hope springs length longer good. In the spring stiffness of the same case, the
long wheel up and down in the spring, the spring from the two ears changes the
volume is relatively small, the front suspension, the caster angle change is small, in
favor of auto driving stability. Increase the length of the spring can reduce stress and
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