| 摘要 |
<p>A fifth wheel assembly (l) for coupling tractor and trailer units includes a trunnion bracket (2) comprising a pair of forged bearing caps (3) having an inverted, U-shaped configuration, with bearing sleeves (4) fixedly mountd therein. In sliding fifth wheel embodiments, the bearing caps are mounted on rectangular channels (5) fabricated from two L-shaped channel members (6, 7) with a flat plate (8) attached to the upper edges of the L-shaped channels. Plungers (9) are provided for adjustably connecting the trunnioned fifth wheel assembly with a base plate on which slotted racks (ll) have been mounted, each plunger comprising a forged, two-prong (56, 57) construction with internal guides which minimizes structural disruption in the channels to provide greater strength. Adjustable stops (l2) are mounted on the exterior sides of the racks (ll) to accurately maintain the plungers in a locked position. A manual lock release (l3) comprises an over-centred lever arm arrangement (95, 97), which securely retains the plungers in the unlocked position for adjustment.</p> |
