DRAGKRAFTAVKENNANDE ANORDNING FOR TRAKTOR

摘要

A tractor draft measuring apparatus has a transverse shaft carried by spaced fulcrums, draft links are connected to the shaft to cause the same to bend under loads carried by the links and a sensing member is connected at one end to the shaft and having its other end free to move relative to the shaft. For draft loads the shaft is relatively stiff in the vertical plane and flexible in a horizontal plane and the member is relatively stiff in a horizontal plane and flexible in a vertical plane. Control means for a valve are coupled to the other end of the member and operated by relative movement of the free member in the horizontal plane caused by changes in draft forces on the links, and being insensitive to deflection of the shaft caused by vertical force components on the links.