| 摘要 |
<p>PURPOSE:To make it easy to adjust the backlash of bevel gears by providing at the end of the output shaft of an electric motor a drive side bevel gear which meshes with a driven side bevel gear provided integrally with a steering system, and providing the output shaft of the electric motor in such a manner as being movable in its axial direction with respect to a housing. CONSTITUTION:A torque sensor 7 for detecting steering torque is provided to the connecting portion of input and output shafts 2, 3 which are supported to the housing 1 of a steering system via respective bearings 4, 5 in such a manner as being freely rotated and which are connected to each other via a torsion lever 6, and a driven side bevel gear 15 which is put in a turning movement coaxial and integral with the output shaft 3 is fitted over the output shaft 3. The bevel gear 15 meshes with a drive side bevel gear 18 provided at the end portion of the output shaft 17 of an electric motor 16 connected to the housing 1 of the steering system. In this case, the output shaft 17 is freely made to advance and retreat by rotation of a bearing holder 28 to be threadably engaged in a female screw 19d formed in the bottom portion 19c of the housing and thereby the backlash of both bevel gears 15, 18 can be adjusted.</p> |
