Determine the installation angle of

Determine the installation angle of the shock absorber. Since there is a certain angle between the shock absorber shaft and the road load input shaft, that is, the angle between the tire contact point and the upper mounting point of the shock absorber, after the suspension system is excited by the road surface, the shock absorber will bear the vertical The lateral torque of the spool. Compared with other traditional suspension forms, the lateral moment is larger, which cannot be ignored in the design and manufacture of suspension and shock absorber [7]. When the axis of the shock absorber is installed horizontally with respect to the ground, the stiffness of the shock absorber is minimal. When the axis of the shock absorber is installed perpendicular to the ground, the stiffness of the shock absorber is greatest. Through a large number of experiments, it is concluded that the installation angle of the shock absorber is 30 degrees. From the above analysis, it can be seen that when the axis of the shock absorber is installed horizontally, its vertical stiffness is the smallest and the bearing capacity of the vertical load is relatively small. When the axis of the shock absorber is installed vertically, its vertical rigidity is the largest. At the same time, the vertical bearing capacity is the largest. From the perspective of vibration isolation, less rigidity is required. From the perspective of improving the service life of the shock absorber, the shock absorber is required to have a larger load-bearing capacity. Although this article only discusses the impact of the vertical excitation force on the shock absorber, there are actually similar problems in the horizontal direction. It can be seen that determining the installation angle of the shock absorber should roughly follow the following principles:(1) Since the horizontal excitation force mainly vibrates in the forward and backward directions and up and down directions, if the shock absorber has good vibration isolation performance in these two directions, and under the condition of sufficient shock absorber strength, α=0 at the same time. In this way, the excitation force causes the shock absorber to be sheared and deformed back and forth, up and down, and is in a good vibration isolation state.(2) When the strength of the shock absorber is poor, the excitation force can make the shock absorber produce the same effect in the front and back, up and down directions. For flat ramps with different excitation forces in the horizontal and vertical directions, the priority strength principle should be determined according to the actual situation.(3) For most cylindrical shock absorbers whose shape factor f is significantly less than 1, the influence of the shape factor on the system stiffness can be ignored, but the shape factor has a greater influence on the normal stress installation angle factor and the equivalent stress factor and cannot be ignored , This is actually the effect of structural stiffness and the effect of bending deformation on the performance of the shock absorber. That is to say, in the design of the shock absorber, its strength calculation must not only calculate its shear deformation and tensile deformation, but also calculate its bending deformation.