Power assisted car steering drive - has coaxial locking member for coupling valve elements, drive input shaft, and drive pinion

摘要

In the car power assisted steering, a pinion (2) meshes with a rack (3) which is connected to a hydraulic piston of the power booster. The pinion is connected by a bar (5) of low torsional stiffness to a shaft (4) which is connected to the steering wheel. The shaft is also connected directly to the pinion by a coupling with variable angular play, whose magnitude is controlled by car parameters, such as its speed, so that at high speed there is a direct mechanical connection between the steering wheel and steering gear for a rapid response to the steering wheel. ADVANTAGE - Compact design with improved effectiveness.