| 摘要 |
A movable subframe for a tractor-trailer includes a pair of spaced-apart, parallel, elongated and longitudinally extending main members. At least two cross members extend between and are attached to the main members, and a retractable pin mechanism selectively positions the subframe beneath a body of a trailer of the tractor-trailer. The retractable pin mechanism includes onl y two pins, with each pin being located generally centrally along a length of a respective one of the main members of the subframe. Each pin is extendable through an opening formed in its respective main member and a selected one o f a plurality of openings formed in a body rail of the trailer, so that when t he pins are in an extended or locked position, the retractable pin mechanism provides generally central support for the subframe and for an axle/suspensi on system which depends from the subframe.
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