| 摘要 |
PROBLEM TO BE SOLVED: To prevent an abnormal sound of rapping generated such as when a reverse input is given from a steering wheel side, by a simple structure, in a power steering device. SOLUTION: Hydraulic oil from a control valve 20 is returned to a reservoir by a return pipe 26. To a branch port 28 branching from a position adjacent to the control valve of the return pipe, one end of a hose 29 consisting of material having extensibility is connected, and the other end of this hose is closed. By large reverse input or the like from a steering wheel side, in the case of fully closing the control valve, hydraulic oil in the hose consisting of material having extensibility connected to the branch port flows in according to a flow of hydraulic oil in the return pipe generated by inertia. Since a rapid negative pressure is prevented from being generated in the return pipe, a bubble is prevented from being generated, accordingly, an abnormal sound of rapping by crushing this bubble is prevented from being generated. |
