| 摘要 |
A joystick pilot valve having an oil leakage preventing structure, according to the present invention, includes: a valve body (3) having a working fluid chamber (6) and a supply port (7) therein; at least one spool (8) which is inserted and disposed in the valve body (3) so as to be movable in the longitudinal direction through the supply port (7) and the working fluid chamber (6) and which controls the flow of the working fluid; a spool hole (9) provided in the valve body (3) to guide the reciprocation of the spool (8) in the longitudinal direction; a pushing cam (10) which is connected with the upper side of the valve body (3) via a joint (2) and which performs a seesaw movement with reference to the joint (2); a joystick lever (1) connected to the pushing cam (10); an outer boot (20) surrounding the outside of the valve body (3), the pushing cam (10), and the joystick lever (1); and an inner boot (30) disposed in the outer boot (20) and forming a leaking oil storage chamber (32) at an upper portion of a guide hole (4) in which the spool (8) of the valve body (3) moves forward and backward, the leaking oil storage chamber (32) being isolated from the outside air. |
