Modified N151 type - 1# internal -combustion engine gantry crane

Modified N151 type - 1# internal -combustion engine gantry crane relates to internal -combustion engine gantry crane sliding gear and mentions the device, and its characterized in that comprises gas circuit controlling means and final controlling element after demolising original manually operation's screw mechanism, gas circuit controlling means comprises air compressor machine, single pole double -acting air cylinder, tribit four -way control valve, rotary joint, cylinder pipeline, final controlling element is become by piston pole, push rod. The advantage is novel, the simple structure of design, and safe and reliable, driver just alone can accomplish vehicle running gear sliding gear fast and mention meshing or separation, and easy operation has improved work efficiency, has fallen at the end workman's intensity of labour and cost of maintenance, potential safety hazard that million accidents of danger such as car of avoiding taking place when the operation of ramp to slide because of the gantry crane wer