Ground contour following plough - has hinging beam with rocker releasing spring return beyond predetermined pivot angle

摘要

The plough is for uninterrupted work, with a beam supporting the plough body and hinging at the forward end on an axis at right angles to the travel direction. The beam is held in the working position by a spring allowing it to swing upwards. Where the spring (9,10) is mounted on the frame (1,2) it is accommodated in a rocker (12,12a,12b) releasing the spring beyond a predetermined pivot angle, so that the beam can continue to pivot against a reduced opposing force.