OVER PRESSURE PREVENTING DEVICE FOR ACTUATOR OF THE POWER CYLINDER IN POWER ASSISTANT STEERING DEVICE

摘要

The present invention relates to a power steering apparatus having an overload prevention structure for contributing to stable operation by preventing overload of a power cylinder caused by sudden full-turning operation of a steering wheel in immature driving or cornering steering. A piston is inserted into the center of the rack and configured to impart a hydraulic power of the linear motion of the rack by the flow of the hydraulic oil. In each of the power cylinders in which the ports are formed, the bypass pipes branching from the oil inlet / outlet ports to allow the chambers to communicate with each other by the pistons moved during the full turning of the steering wheel are equal to each other.