Electro mechanical brake tightening device
AssigneeKnorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
InventorsJosef Staltmeir, Thomas Wagner, Ulf Friesen
Life of this patent
Estimating the term…
Abstract
An electromechanical brake tightening device for a rail vehicle, includes a brake actuator to apply and release brakes. The actuator has a power converter to convert energy supplied by the brake actuator to a brake application movement. The power converter includes a shear force measuring bolt and/or a brake lever, arranged in a power transmission path of the converter to measure braking power.
Claims15
Electromechanical brake tightening device (1), particularly for a rail vehicle brake, having a brake actuator (2) for the application and/or release of the brake, and having a power converter (8) for converting the energy supplied by the brake actuator (2) to a brake application movement, characterized in that the power converter (8) contains a shear force measuring bolt (58) and/or brake lever (36) arranged in the power flux and equipped with at least one measuring sensor for the indirect or direct braking force measurement.
Electromechanical brake tightening device according to one of the preceding claims, characterized in that the measuring sensor for the indirect or direct braking power measurement contains at least one strain gauge (60) held on the circumference of the shear force measuring bolt (58) and/or on the circumference of the brake lever (36).
Electromechanical brake tightening device according to one of the preceding claims, characterized in that the measuring sensor for the indirect or direct braking power measurement contains at least one strain gauge (60) held in a hollow bore of a thin-walled shear force measuring bolt.
Electromechanical brake tightening device according to one of the preceding claims, characterized in that recesses (62) for accommodating the strain gauges (60) are provided on the circumference of the shear force measuring bolt (58), which recesses (62) are situated in the area of axial junction planes of the connecting rod head (28) with the cheeks (38) of the brake lever (36).
Electromechanical brake tightening device according to one of the preceding claims, characterized in that the measuring sensor (60) for the indirect or direct braking power measurement contains at least one pressure-measuring transducer integrated in the shear force measuring bolt (58), preferably a pressure-measuring transducer operating according to a capacitive, piezoelectric or piezoresistive principle.
Electromechanical brake tightening device according to one of the preceding claims, characterized in that the shear force measuring bolt (58) has an end-side bolt head (66) which has an enlarged diameter and in which an electronic sensor signal analyzing system (64) is arranged.
Electromechanical brake tightening device according to one of the preceding claims, characterized in that, by means of the measuring sensor (60), actual values for the momentary braking power can be supplied as signals to a regulating device.
Electromechanical brake tightening device according to one of the preceding claims, characterized in that the brake actuator (2) contains an electric motor (4) whose motor current can be detected by a current sensor.
Dependencies are inferred from the claim text.