Requirements for trailer axle design

(1) The axle should have sufficient strength and stiffness to reliably withstand the force between the wheel and the frame. (2) Ensure that the kingpin and the steering wheel have the correct positioning angle, make the steering wheel movement stable, and keep the positioning angle of the steering wheel unchanged. (3) The wobble of steering wheels should be minimal. (4) The non-suspended weight is as small as possible.