VARIABLE WIDTH TYPE TILLAGE TOOL Russian patent published in 2007 - IPC A01B35/30 

FIELD: agricultural engineering, in particular, complete cultivation technique.

SUBSTANCE: tillage tool has frame, horizontal left-hand and right-hand four-link chains pivotally mounted on frame, hydraulic cylinder, flat hoes equipped with tine and two shares. Four-link chains consist of two parallel bars and lateral links. Tillage tool is provided with additional hydraulic cylinder, additional links disposed in parallel with lateral links and pivotally mounted on parallel bars, and carrier bars positioned therebetween, in parallel with lateral links. Tine is fixed on each of carrier bars. Tine is made hollow and provided with pipe incorporated therein. One of shares is rigidly fixed at lower end of pipe and other share is fixed at lower end of shaft extending within pipe. Carrier rigidly secured at upper end of pipe has guiding member pivotally connected to additional link. Carrier is provided with pivotal four-link chains formed from applied members, one of said members being rigidly connected to shaft and other opposite member being equipped with slide entering into slot formed on longitudinal guiding member rigidly fixed on carrier bar. Bars of four-link chains are joined with hydraulic cylinders secured on frame.

EFFECT: simplified construction of mechanism for altering width of working tools and enhanced reliability in operation.

7 dwg