ELECTROMECHANICAL STEERING BOOSTER TORQUE SENSOR Russian patent published in 2007 - IPC B62D5/04 G01L3/10 

FIELD: transport engineering.

SUBSTANCE: invention relates to components of electromechanical steering booster and it is designed for decreasing force on steering wheel when maneuvering at slow speed and turning wheels at standstill of vehicle. Base is used to fasten to rotor of electric motor. Signal processing microcircuit is arranged on one side of first printed-circuit board, and on other side, spring-loaded current collectors are installed. Metering unit is formed by torsion bar connecting output and input shafts of electromechanical steering booster and resistance strain gauge bridge. Metering unit has wire communication with signal processing microcircuit. Cylindrical case PLUS and MINIS supply terminals and output terminal of device. Second printed-circuit board is rigidly fastened by one side to flat surface of case, and by other side it contacts with current collectors of first printed-circuit board by conducting concentric paths on printed-circuit board connected with said terminals of case. Through holes for torsion bar are made in centers of base, first printed-circuit board, flat surface of case and second printed-circuit board. Base is provided with at least two catches at both sides of hole for torsion bar. First printed-circuit board is rigidly attached to base. Catches of base are designed for connection with case. Case, together with base, forms movable system executing axial rotation of base relative to case through unlimited angle. Invention simplifies design of sensor by excluding wiring board and liable to wear and ageing contact connection between first printed-circuit board and base. Moreover, sensor is insensible to large allowances in manufacture of parts.

EFFECT: improved operation reliability of sensor and entire electromechanical steering booster.

3 cl, 2 dwg