| 摘要 |
A control valve unit (10) disclosed includes a slide mechanism (14) mounted on a base (40) of the unit, a control member (18) driven by a hydraulic linear actuator (12) controlled by the unit, and a control valve (22) that feeds hydraulic fluid to the actuator and has a deactivator (24) that is engaged and moved by a pair of slides (16a,b) of the slide mechanism under the impetus of the control member movement in order to terminate driving of the actuator at its limits of movement. The slide mechanism includes a slideway on the base and a pair of fixed stops (62a,b) between which the movable slides are supported on the slideway and biased by a helical spring (68) against the stops. The helical spring is aligned with openings (66) in the slides and the control member (18) extends through the spring and the slide openings. Lugs (76a,b) on the control member for moving the slides are preferably adjustable so as to permit adjustment of the limits of actuator movement. A pair of cams (82a,b) respectively mounted on the pair of slides have cam surfaces for engaging the control valve deactivator (24) and are adjustable to control the deceleration rate of the actuator. A round cam surface of the deactivator and limit cam surfaces on the adjustable cams have a construction that permits adjustment of the deceleration rate without affecting the limits of actuator movement. A preferred slide rod construction of the slide mechanism and through-bolt clamp construction of the base are also provided as is a check valve and pressure relief valve arrangement that accommodates for different size areas on opposite sides of an actuator piston of the single connecting rod type.
|
