Patent ID: 9010483
Filing Date: 2015-04-21
Classification: B62D,F16H,Y10T

Abstract:
1. A power steering device comprising: a steering mechanism having a steering shaft connected to a steering wheel and adapted to transmit a movement of the steering wheel to steered road wheels; an electric motor configured to apply a steering assist force to the steering mechanism; a speed reducer installed between the steering mechanism and the electric motor, and comprising a worm gear, the worm gear being constructed by a worm shaft whose one axial end is connected to the electric motor and a worm wheel in mesh with the worm shaft for transmitting torque of the electric motor to the steering shaft; a gear housing having a worm-wheel housing section in which the worm wheel is housed and a worm-shaft housing section in which the worm shaft is housed; a slider arranged at the other axial end of the worm shaft housed in the worm-shaft housing section of the gear housing and configured to be movable in a longitudinal direction of the worm shaft; a biasing member configured to bias the slider toward one side of the longitudinal direction of the worm shaft; and a guide member configured to bias the worm shaft in a direction for meshing with the worm wheel by a movement of the worm shaft in the meshing direction that the worm shaft approaches a rotation center of the worm wheel with a movement of the slider toward the one side of the longitudinal direction, and also configured to restrict a movement of the worm shaft in a direction opposite to the meshing direction of the worm shaft.