ELECTRICALLY SUPPORTED STEERING BOOST WITH COMPACT SPUR GEAR ARRANGEMENT

摘要

The invention relates to a steering boost for motor vehicles with a drive unit that is coaxially arranged in relation to the steering shaft axis and that consists of a combination of a disc-shaped electromotor and a spur gear which enables particularly high reduction ratios and a good, steering behavior which is free from play and has good compact and cost-effective construction. A rotor disc of the electromotor is rotationally arranged around the steering shaft and drives a pinion hollow shaft which is arranged coaxially in relation to the shaft. The pinion hollow shaft acts upon a spur gear that is arranged eccentrically in relation to the shaft. Power transmission from the spur gear is coupled back to the shaft. The motor and the gearbox are mounted on a carrier plate which is fixedly mounted at the vehicle chassis.