Patent GB-1293927-A (GB)
Title: Improvements in or relating to tractors
IPC: A01D41/04
Filed: 1969-10-07
Abstract: 1293927 Tractors; removable bodies C VAN DER LELY NV 7 Oct 1969 [7 Oct 1968 28 May 1969 7 Aug 1969 23 Sept 1969] 49282/69 Headings B7B and B7H [Also in Divisions A1 B8 and E1] In a tractor to which agricultural machines or mplernents may be attached over the main frame on vertical hydraulic rams and at the ends on two- and three-point linkages (see Division A1), a driver's cab is pivotally mounted to the main frame by a single arm or a parallelogram linkage so that it can be moved to a position extending beyond the main frame as seen in plan. When the cab is rotatable about horizontal axes it is arranged to remain upright, and when it is pivoted about vertical axes it may be arranged to remain facing in the same direction during rotation. In one embodiment, Figs. 1 and 2, a cab 14 is pivoted to a hollow cranked arm 13, through which the driving controls pass, pivoted to the main frame 4 at 15 so as to be movable between the positions shown in continuous and in dotted lines. The cab is retained at these positions by resilient locking members 22, 22A. Both pairs of wheels 5, 5A are driven by a transverse engine 26 via shafts 37, 39 and differentials 38, and are steered by rams 7 and steering rods 6. In a similar embodiment, Fig. 15, the cab 14 is pivoted on an arm 161 mounted on a vertical pivot 164 on a bracket 163. The arm can be locked in several positions by a lever 165 engaging notches on the end of the arm 161. The arm is cranked so that the cab can overlie the main frame in the foremost and rearmost positions. As shown in Fig. 18 a waggon body 186 may be fastened to the lifting rams 23. The tractor may be disconnected and driven away after the body has been raised by the rams 23 and supported on legs 188 which are swung down and locked in a vertical position. The cab of the tractor may alternatively be replaced by a parallelogram linkage (Fig. 16, not shown) comprising a main support arm (175) and a control arm (176) which may be disconnected from its pivotal mounting (177) on the bracket (174) to permit rotation of more than 180 degrees. In a further embodiment, Figs. 5, 6, the cab 14 is pivoted about two horizontal axles 86, 87 by two arms 80 which rest on stops 88 at the lowest positions. Axles 86, 87 are rotationally fixed on the main frame 81 and on the cab respectively and carry fixed sprockets 89, 91 engaged by chains 90, 92 which are interconnected by an adjustable link 95 and by a second adjustable link 97 and an arm 8. Arm 8 is moved along guide 105 by a ram 102 attached to the casing of the arm 80 thereby moving the chains about the sprockets and hence moving the cab. This chain and sprocket system may replace the single arm 161 in the embodiment of Fig. 15. In the embodiment of Fig. 7, a cab 5 is supported by a parallelogram linkage 120, 121 pivoted about horizontal axes, and a waggon body is pivoted to the main frame at 119 and tipped by a telescopic ram 115. In a further embodiment, Fig. 3, the cab is pivoted to uprights 45 by a parallelogram linkage, the arms of which are not in the same plane to permit rotation through more than 180 degrees. The body 58 is attached to rams 57 which are used to unload it by raising it until pins 61 are engaged by hooks 62 of arches 59. The motor is housed in the rear of the hollow beam 41 forming the main frame and wheels 42, 43 are vertically movable relative to the beam. Wheels 43, 44 are steered and either both of these or wheels 42 only are driven. Alternatively (Fig. 4, not shown) the cab 50 may be pivoted to the main frame about vertical axes via a single arm (63).