Special chassis from the engine, chassis, running gear, steering mechanism and other components. Taking into account the overall requirements of reliability, noise, emissions, etc., preferably Cummins B3.3 ~ C60 type construction machinery diesel engine, which is water-cooled inline four-cylinder, naturally aspirated engine with full governor, smooth operation, has high thermal efficiency, low specific fuel consumption, less emissions pollution. Due to the low trolley travel speed, considering the safety and economy of operation, the frame rigid connection type, no suspension mechanism, tire selection of high load of solid rubber tires. Walk way to the hydraulic drive, direct selection of imported motor and reducer integrated Built-walking gear with fast two-block with slow speed to meet the requirements of the vehicle under different circumstances. When the ramp with running gear with self-braking function, but also set off device, in case of failure to facilitate towing. Steering mechanism driven by hydraulic cylinder rod steering mechanism. Work equipment working device by turret, working jib, telescopic soft chains and other components. By slewing ring turntable mounted on the frame, driven by the rotating mechanism can achieve 360. Full swing. Slewing mechanism includes a planetary gear, normally closed brake, hydraulic motor, etc., and slewing ring with external gear transmission mode. Working with turret boom connected to three telescopic structure, Boom rounded quadrilateral section, among the working arm oriented nylon sliders. Section telescopic cylinder direct promotion arm, the arm in the third quarter telescopic mechanism of action of the chain and the second arm retractable sync. Conducted by luffing jib luffing cylinder pushing all hinge points are self-lubricating bearings, lower maintenance requirements, all of which require lubrication points are equipped with refueling port, you can easily maintain. To facilitate maintenance, all cylinders, external piping, pipe and cable have protection towline. Full three-dimensional rotation mechanism mounting location devices or systems are generally determined by the elevation and direction of the two parameters. Due to the requirements of the object to be lifted in three mutually perpendicular directions of space can be independently rotated so that the object can be obtained at any mounting angle, so the design of the full three-dimensional rotation as shown in Figure 3, namely the set in horizontal and vertical direction ± 90. Rotation mechanism. Tilt angle direction by luffing carried by fine-tuning to achieve leveling cylinders, should no longer separate body, thereby reducing institutional settings. Swivel rotary body, the internal organization of the screw nut, screw hydraulic push to drive the rotation of the outer ring, screw stroke is controlled by controlling the rotation angle of the rotary body. Hydraulic oil based hydraulic lock on the road, still locked when hydraulic oil, rotating body can reliably locate. Rotational small size, minimal hydraulic flow can be a great angle of rotation, the problems caused by the rotation speed is difficult to control. To solve the problem of speed control, in the hydraulic system set separately micropump, which displacement of only 0.6ml / min, micro-pump driven by a dedicated motor, can ensure constant speed, thereby providing a stable flow for the rotary system.