GB516977A - Improvements in or relating to cultivators or tilling machines - Google Patents

Abstract

516,977. Land-cultivating machines. ROYSTON, M. H. July 13, 1938, No. 20769. [Class 6 (i) ] A land cultivator or tilling machine drawn by a tractor comprises a number of rotary tilling tools mounted so as to rotate behind a number of fixed tines carried by the machine frame, drive means for imparting motion to the said rotary tilling tools from a power take off shaft on a haulage tractor or a power unit carried by the machine frame, and lifting gear of the cranked axle type associated with the machine land wheels for raising and lowering the machine frame about its anchorage to the tractor with respect to said wheels. In the form shown in Fig. 1, the cultivator frame 1 is mounted on land wheels 2, and provided with known lifting- gear of the cranked axle kind similar to that described in Specification 459,297. The frame is adjustably coupled at 12 to a tractor 11. Vertically fixed tines 13 are mounted on the frame 1, e.g., adjustably on cross shafts 14. At the rear of the machine are a series of vertical or slightly inclined bearings for rotary tilling tools 17, which may be constructed, arranged, and driven as described in Specification 459,297. In the arrangement shown, the tools are driven, through change-speed gear-box 24, shaft 19 and gearing 20-23, by an engine 18 mounted on the frame 1. A manually or automatically-operated clutch may be provided for putting the tools 17 out of action ; automatic operation of the clutch may be effected by the raising or lowering of the frame 1, e.g., by connection of a clutch lever 26 to a crank on the cranked axle shaft 4. Fig. 3 shows a modified form of tilling tool having downwardly projecting tines 30 detachably mounted on a vertical rotary spindle 29. In another machine, Fig. 5, the rear tools 31 rotate on an horizontal shaft 35 mounted on a separate framework 32 pivotally and detachably connected at 33 to the main frame 1. A device 34 enables a depth adjustment of the tools 31 relatively to the tines 13 to be effected. In this construction, there is a double chain drive 36, 37 from the motor to the rotary tool shaft. The motor may, in a further modification, be mounted on an extension of the frame 32.