| 摘要 |
A trailer convertible to a sled uses a drop axle, which is mounted for rotation. The drop axle has a sled mode and a trailer mode. Upon rotation of a primary shaft of the drop axle in a first direction, ski supports lower skis into the sled mode and secondary shafts supporting wheels are raised. Upon rotation of the primary shaft of the drop axle in a second direction, the ski supports raise the skis and the secondary shaft supporting wheels are lowered to the trailer mode. A lock is provided for locking the drop axle in a selected one of the sled mode or the trailer mode.
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