HAY STACKER Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: hay stacker has rake grate mounted on tractor by means of four-link mechanism consisting of post rigidly secured on tractor frame, upper and lower rockers hinge-coupled with post and rake grate. Hay stacker has driving link-hydraulic ram hinge-coupled with four-link mechanism and post. Hydraulic ram attachment hinge joints are arranged coaxially with hinge joints located on diagonal of four-link mechanism, and rockers are connected with rake grate by means of coupling frame which forms, together with rockers and hydraulic ram, a spatial structure resting on post. Lower rocker and coupling frame can be made in form of flat trusses, and upper rocker, in form of two rods coming together to coupling frame, and the latter can be furnished with eyes or other coupling arrangements for connecting not only rake grate, but also bucket, load-lifting hook or other mounted implements. EFFECT: increased lifting capacity owing to reduced masses of hay stacker members lifted together with load. 3 cl, 2 dwg