Screwing wheel for use in worm gear for power steering apparatus in electromechanical steering device for steering wheel of motor car, has connecting part comprising helical ribs, which are extended from origin in both directions

摘要

The wheel (10) has an outer part (16) carrying teeth (18). Helical ribs (22) of a connecting part (14) are extended from an origin in both directions. An inner region (12) e.g. hub, of the wheel and the connecting part are radially and axially interlocked with each other. Supplementary bent extending ribs are extended out of a reinforcement element of the connecting part and interconnected with each other by a disk. The reinforcement element is extended into the teeth of the outer part. A connecting ring is provided at the connecting part in a region of a gearing (20) of the outer part.