| 摘要 |
<p>The present invention relates to a trailer having a movable wheel, which raises a wheel when transferring a trailer into water in a trailer transferring a boat on land or a camping trailer. The present invention relates to a trailer moving while carrying a boat or a camping trailer. A shaft fixing device is installed on both sides of a trailer frame, and vertically rotates around a hinge. A hydraulic cylinder is installed between a front end of the shaft fixing device and the trailer frame. A wheel fixing board is inserted into the shaft fixing device. A movable hydraulic jack is installed in the frame. An auxiliary wheel is coupled to a front end of the hydraulic jack.</p> |
