| 摘要 |
A torsion axle is provided, which includes an axle tube having an interior chamber and an insert assembly positioned within the interior chamber. The insert assembly includes a rigid shaft, a relatively flexible cartridge, and relatively inflexible front and rear bushings. The cartridge has an interior passageway receiving the shaft and the front and rear bushings likewise each have an aperture receiving the shaft. The front bushing is positioned on the shaft in front of the cartridge, while the rear bushing is positioned on the shaft to the rear of the cartridge. The front and rear bushings are dimensioned to fit closely within the interior chamber and are freely rotatable relative to the shaft, while the cartridge is non-rotatable relative to the shaft at the interior passageway. The front and rear bushings provide means for absorbing the vertical load on the insert assembly to the exclusion of the cartridge, while the cartridge provides means for absorbing the torsional load on the insert assembly to the exclusion of the front and rear bushings. The torsion axle also has a selectively removable cap positioned over the front end of the interior chamber, which enables selective removal of the insert assembly from the interior chamber. A method is provided for selectively adjusting the torsion load rating of the torsion axle by removing one insert assembly and replacing it with another having a different torsion load rating.
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