| 摘要 |
<p>A drawbar connector comprises a frame (44) having a horizontal pivot (26) displaced forward of a vertical pivot made up of tree bearing members (32, 34, and 36). The top and bottom bearing members (23, and 34) are radial bearings while the middle bearing (34)is a thrust bearing. The bearing (32) is also forwardly displaced of the middle bearing (34) as is the middle bearing (34) of the bottom bearing (36). The offset horizontal pivot (26) and the vertical pivot of bearings (32, 34 and 36) provide an improved turning ability for the trailer as does the staggered horizontal arrangment of the vertical bearings (32, 34 and 36). The horizontal pivot (36) is made up of pairs of tappered bushes at either side of the drawbar. A trailer having a movable axel group (24) is also described. The axle group (24) is part of a chassis sub-frame assembly which can slide underneed the chassis perimeter beams and lock in position with four hydrualicaly operated locking pins. A trailer is also described having a rear extensible member (25). This member is accomodated in hollow chassis perimeter beams of the trailer and is locked in place by a pair of locking pins in either a retracted or an extended position. In its extended position the rear extender member acts as a cantilever beam to increase the capacity of the trailer</p> |
