| 摘要 |
<p>Two spaced and parallel V tracks are secured to the underside of a trailer body and engaging a plurality of rollers having V grooves therein which are mounted upon the main undercarriage frame thus facilitating easy movement and adjustment of the undercarriage relative to the trailer body. Locking means are provided at intervals between the undercarriage and the trailer body so that the two may be locked together in a plurality of selective positions. This construction keeps the undercarriage in true alignment with the trailer frame without the need for side thrust rollers or guides. Furthermore the V tracks maintain engagement with the V rollers due to the weight of the trailer frame.</p> |
