How Does Torsion Axle Works?
Before getting to know how the torsion trailer axle works, let's learn the structure/components of the torsion arm axle first. As we know that the structure of leaf spring axle is very simple: axle beam, stub axle on two sides then hub assembled assembled to make a complete leaf spring trailer axle. Some times leaf spring axle beam are solid steel. So when manufacturing this kinds of axle, just need to lathing the two ends. Torsion trailer axle structure is a little complicated.
Torsion trailer axle comprise of axle beam (square steel tube), torsion arm (made by hot forging process), stub axle, the solid beam, and rubber rod. Torsion arm is a link to stub axle and solid beam. Stub axle, torsion arm, solid beam are welded to make one part (some cars are connected by bolts to connect these three pieces together). Then is it squeezed into the square torsion axle beam with 4 rubber rods together. 4 rubber rods are on the four corners, and the solid beam is wrapped in the middle.
The rubber rod in the torsion arm axle is very important. The rubber rod can neither be too soft nor too hard. If the rubber rod is too soft it will be severely compressed and deformed when the trailer is loaded, and it is easy to fall off from the torsion axle beam. If the rubber rod is too hard, it will not be able to absorb shock.
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