Assembly of suspension

The connecting rod suspension of a vehicle is a four-link suspension with a transverse stinger, which supports the axle assembly through a pair of upper Control arms and a pair of lower Control arms connected with the body, and connects the body and the axle assembly through the transverse stinger. In addition, as a link suspension, there is also known as the three-link suspension, which supports the axle assembly through a pair of lower Control arms and connects the body to the axle assembly through a transverse stinger. In such a linkage type suspension, the front end of a pair of lower Control arms is wobbly connected on a pair of side frames by a spindle between a pair of support pieces that are opposite in the width direction of the vehicle and extend downward from each side frame. In addition, a pair of rear end of the lower Control Arm is connected to the axle assembly through a bushing with built-in elastic components. The axle assembly is relative to the rear end of the lower Control Arm. Within the bending range of the elastic components of the bushing, the displacement can be in the up and down direction and the direction of the width of the vehicle.

The suspension assembly steps are as follows

First, the rear ends of a pair of lower Control arms are assembled to the axle assembly via bushings.

Then, make a pair of lower Control arms and axle assembly move upward from the lower direction of a pair of side frame, insert the front end of a pair of lower Control arms between a pair of support parts and connect to a pair of support parts through the spindle.

However, a pair of lower Control arms are sometimes installed on a pair of side frames in a front open state with lateral displacement gradually towards the width of the vehicle as it moves in front of the vehicle, or sometimes in a front closed state with gradual medial displacement towards the width of the vehicle as it moves in front of the vehicle. 

In this case, since the rear end of a pair of lower Control arms is connected to the axle assembly through the bushing, a pair of lower Control arms is maintained in the state of front opening or in the state of front closing by resisting the elastic force of the elastic member of the bushing. You need to install a pair of lower Control arms on a pair of side racks. In other words, because the operation of installing a pair of lower Control Arm on a pair of side frame needs to resist the elastic force of the elastic member of the bushing, so that a pair of lower Control Arm can keep the front open state, or keep the front closed state, so it is very time-consuming and laborious laborious work.