ELECTRIC POWER STEERING APPARATUS FOR VEHICLE

摘要

Disclosed is an electric power steering apparatus for a vehicle. The electric power steering apparatus for a vehicle has a structure in which a motor shaft, an input shaft, a pinion shaft, and the like are coaxially disposed to improve a structure of a conventional art in which an electric motor is essentially exposed, so as to prevent interference with other structures, thereby forming a layout of the steering apparatus to be compact.

主权项

1. An electric power steering apparatus, comprising:
an electric motor supported on an inner peripheral surface of a housing, having a hollow shape, and including a son gear mounted on an outer peripheral surface of one end; a planetary gear assembly which includes a plurality of first planetary gears internally engaged with a first ring gear fitted in the housing, a plurality of second planetary gears connected to the plurality of first planetary gears by a connection shaft respectively, and internally engaged with a second ring gear, and a carrier to which both ends of the connection shaft are coupled and supported; and a pinion shaft which extends through the motor shaft, and has one end thereof on an outer peripheral surface of which a pinion gear is mounted to be engaged with a rack gear formed on a rack bar, and the other end thereof which is connected to the input shaft by means of the torsion bar, the pinion shaft being connected to the second ring gear.