| 摘要 |
<p>The present invention relates to a servo assisted actuating system for a multispeed gearbox of a vehicle, comprising a cable connection (10), a servo cylinder (30), a piston (32) slidably disposed in the interior of the servo cylinder and dividing the interior into an inner (36) and an outer chamber (38), a piston rod (34) connected to the piston and extending to the exterior thereof, and a control valve (60) to be connected to a pressure fluid source, one end of the cable being connectable to a gear lever (2) and the other end being connected to the control valve (60) to control it to selectively supply pressurized fluid to the servo cylinder, the piston rod (34) being provided with first mounting means (40) adapted to be mountable to a fixed part (4) of the vehicle structure, the servo cylinder being provided with second mounting means (50) adapted for connecting the servo cylinder to a control rod (6) of the gearbox, characterized in that in that the cable is extending through a central through hole (35) longitudinally extending through the piston rod and piston into the inner chamber (36) of the servo cylinder where the cable is connected to an actuating arm (62) which is adapted to transfer longitudinal movements of the cable (14) to the control valve for actuating it, wherein the cable is slideably received in the through hole and sealing means are provided for sealing the through hole with the push-pull cable received therein to prevent leakage of pressure fluid from the servo cylinder.</p> |
