| 摘要 |
A powered, adjustable height, fifth wheel hitch comprising a support plate having a front end portion and a rear end portion, a fifth wheel plate above the su pport plate having a front portion and a bifurcated rear portion, coaxial transverse tru nnion pins supporting the fifth wheel plate on the support plate, a pair of spaced rear mounts on the support plate rear end portion, torque frame linkage between the rear mounts and the trunnion pins, a pair of spaced forward slides on the support plate front en d portion, a pair of spaced forward links between the torque frame linkage and the slide s, lock pin receiving openings in the forward links, interconnected lock pins shiftable simultaneously between lock position in the openings and unlock position out of the opening s, a pair of laterally spaced cam follower rollers on respective torque frame linkage, a pair of laterally spaced, slidably movable, vertically tapered wedging cams on the s upport plate, engageable beneath respective ones of the cam followers, a pair of fluid acu tators attached to the support plate and connected to the wedging cams to shift the wedging cams toward and away from the cam followers, and thereby shift the cam followers vertica lly up and down respectively, the wedging cams each having first and second internested wedges, one above the other, and a slide connection therebetween so that first the l ower wedges engage the cam follower rollers to start the lifting function of the fifth w heel, and then the upper wedges shift and engage the cam follower rollers to shift the fift h wheel plate to its upper position. -10-
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