| 摘要 |
A truck assembly comprises a baseplate including a pivot arm hole, a first kingpin hole and a spring holder. A wheel axle is couplable to a wheel on each end of the wheel axle. A pivot arm is inserted into the pivot arm hole of the baseplate. An axle housing has a first end, a second end and a second kingpin hole. The first end includes the wheel axle and the second kingpin hole, and the second end includes the pivot arm. A swingable kingpin includes a first portion and a second portion. The first portion swings relative to the second portion. A spring member is provided substantially parallel to the kingpin and is coupled to the spring holder of the baseplate and the first end of the axle housing.
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