GB746541A - Tractor hitch mechanism - Google Patents

Abstract

746,541. Tractor power-lift mechanisms. FERGUSON, Inc., H. Feb. 11, 1954, No. 3987/54. Class 79 (1). A tractor-mounted implement, of the type suspended from laterally-spaced draught-links 13, 14, is provided with means for skewing the implement as the tractor turns comprising a pair of vertical cranks 31, 32 pivoted in yokes 33, 34 about coaxial horizontal pivots 35, 36, the cranks having outwardly-extending horizontal pins 37, 38 at their lower ends for the reception of the rear ends of the links 13, 14 and vertical pins 51, 52, at their upper ends receiving the rear ends of a pair of crossed links 41, 42, the forward ends of which are mounted on the opposite draught-links 13, 14. The implement may comprise a disc-harrow 27 with a beam 26 which lies at an acute angle to the centre line of the tractor by being secured to a transverse draw-bar 24 through a bracket 25. The beam and draw-bar together carry the A-frame 22 to which the upper hitch-link 19 is attached. The draw-bar 24 carries the yokes 33, 34 by means of bolts 35, 36 passed through bearings 54 in the cranks. The upper pivots 51, 52 are spaced on the inner side of the centre line 53 of each crank while the lower pivots 37, 38 lie on the opposite side of this line, so that the draught forces during turning of the tractor result in a relative angling of the drawbar 24. In a modification (Figs. 6 and 7, not shown), the degree of angling is adjustable by providing alternative upper pivot-pins and by making the cross-links of variable length.