| 摘要 |
The invention discloses a control valve driving mechanism. Due to the adoption of the control valve drive mechanism, the frictional resistance between a rod member and a piston is decreased along with the shacking of the rod member. Therefore, the long-term operation is smoothly ensured. A leveling valve V comprises a housing (30), a valve column (32) arranged inside the housing (30) and a piston (31) in linkage with the valve column (32). By means of the movement of the valve column (32), the leveling valve V is switched between an air supply position and an air drainage position, wherein the gas supply port (30b) and the gas outlet (30a) of the leveling valve V are communicated with each other. The upper end face of the piston (31) is equipped with a concave part (31a). The leveling valve V driving mechanism is provided with a rod member (40) and a working pin (44). The base end of the lever member (40) is supported on the housing (30) in a freely rotating manner so as to bear the load of a machine and a platform (1) and move along the moving direction of the piston (31). A working pin (44) can freely rotate around the rotating shaft parallel to the rod member (40) and is supported on the end part (40) of the rod member (40). The top end of the working pin is accommodated inside a recess part (31a) and is supported by the recess part. |
