Motor vehicle steering device

摘要

The invention provides a compact and highly reliable motor vehicle steering device (1) that does not require a spiral flat cable. The motor vehicle steering device (1) includes variable gear ratio system (10) that modifies the transmission ratio of the rotary motions between first steering shaft (110) and second steering shaft (120). Variable gear ratio system (10) comprises Strain Wave Gearing Speed Reducer (130) that modifies the transmission ratio between first steering shaf (110) and second steering shaft (120) in response to the rotating speed of motor shaft (152). Motor shaft (152) and second steering shaft (120) forms a substantially concentric dual structure, drive motor (150) is affixed, and output shaft (151) is connected to motor shaft (152).