LOAD MEASURING CELL FOR DISPLAYING AXIAL AND TRANSVERSAL FORCES THAT ACT ON A SHAFT BY MEANS OF STRAIN GAUGES

摘要

The invention relates to a load measuring cell for measuring axial and transversal forces that act on a rotating shaft. Said device can be used, for example, in spindle drives for measuring the axial force that is exerted. Said spindle drives are used, for example, in devices for replacing hydraulic cylinders, in particular in printing presses press and punching machines, textile machines and die casting and injection moulding machines. Numerous applications are known, but there are always instances of erroneous values during the deflection process. Slip-stick effects also produce direct measuring values that are unusable. The basic principle of the invention is based on the direct measurement of the force on the fixed bearing. This reduces the inertial forces and the inertial forces induced by the latter to a minimum. The fixed bearing (3) is supported in a radial direction on both sides of its axis by an annular disc or disc-type element (4). As the fixed bearing seat is configured with a degree of play in relation to the bearing housing (2), no friction occurs during the deformation. A strain gauge (8) that is mounted on a cross-sectional narrowing (11) indicates the magnitude of the axial and transversal forces by means of the modification in voltage.