Reversible plough trip mechanism - has spring at end of hinged rod which is housed in hollow beam with axles at inner end engaged with semicircular bearing shells

摘要

The two plough bodies are supported by a plough beam (5) the end of which are formed of two symmetrical projections (5a, 5b) each supporting an axle (13, 14). The axles rest against two semi-cylindrical bearings (15, 16) on a support forming part of the plough frame (1). The axles (13, 14) are held against the bearings (15, 16) by means of a rod (17) hinged on the support (1a) by an axle (18). The back end of the rod (17) passes through a helical spring (26) against which it is held by a nut (28) and washer (27). When the plough trips on striking an obstacle, the spring is compressed and returns the plough to its working position automatically.