1 Crawler Hydraulic Bulldozer TQ160 TQ160A in the reference and absorption of foreign advanced technology, based on a self-developed hydrostatic drive track-type bulldozer. It uses the procurement of international purchasing parts, bulldozer on the performance of the engine, the main hydraulic pump, drive motor and key electrical components of the international brand-name products are used to ensure that the aircraft of superior performance, while also integrated into a number of design Innovative technology 1, Main technical parametersDeutz Engine BF6M1013E (imported) Rated Power (kW) / speed (r / min) 137 / 2 300 Total mass (kg) 16 500 Track center distance (mm) 1 880 Ground contact length (mm) 2 430 Track Width (mm) 510 Ground pressure (kPa) 67 Blade (L H) (mm) 3 420 1 150 Soil depth of maximum shear blade (mm) 545 Blade maximum lift height (mm) 1 095 Minimum turning radius (without blade) (mm) 1 900 Speed (km / h) forward two block: 0 4.5,0 10 Back two block: 0 4.5,0 10 2, the main structure and performance characteristics2.1 set axis units frameShown in Figure 1, sets the frame with swing shaft structure, which with the balance beam is connected via a dedicated articulated mechanism to fully meet the bulldozer work in Taiwan, the swing frame required; and racks through the fixed pivot independent of each other , pivot detachable structure, most of the weight machine passed directly to the frame through the pivot, thus greatly reducing the transmission of 2 the bulldozer was at work, the impact and prolong the life of the transmission system; pendulum shaft structure Province frame to the traditional structure of the ramp platform support, simplified structure, improved processing technology, reduce production cost and increase rigidity; the final drive and sets the frame separately, without dismantling the case of Taiwan, a direct repair frame Final drive, easy maintenance. 2.2 Work equipment controls Working. device control by the pilot control system, all actions Blade: upgrade, down, left and right tilt and float, complete with a handle and manipulate very labor-saving, light sensitive, accurate and reliable. Figure 2 shows the blade control handle. At the same time, the aircraft are also used with ripper pilot hydraulic control systems. 2.3 Driving and parking brake control system3 Hydraulic proportional control servo drive control system, the system consists of a dedicated pilot gear pump oil, the forward, backward, left turn and driver-specific in situ hydrostatic steering performance focused on a handle, while the handle is integrated travel speakers , speed, and reversing alarm switch block, which greatly simplifies the control system running, so the driver can concentrate on work. When the control lever is in neutral position, the pump will cut off access to the variable ratio power servo control valve oil, zero displacement hydraulic pump, hydraulic motor lock, the vehicle can not walk, so as to achieve the purpose of the safety brake. To ensure the safety of vehicles, aircraft design is still a driven gear shaft safety brake for parking (or emergency parking brake), the brake is normally closed, when the engine stalled or moving the operating handle is in neutral position, the brakes closed under spring force, to achieve braking; and when the manipulation of moving the handle, the role of the control to open the brake fluid, so that bulldozers driving. Parking brake lever by the brake control and emergency brake button control, manipulation of any of them, can achieve braking. 2.4 Transmission Shown in Figure 3, TQ160A bulldozers closed double-loop 4 double-pump hydraulic system, driven by the engine double variable pump, piston-type variable hydraulic motor driven, hydrostatic drive system components, and finally tracked vehicle driven by the final drive and steering. Each side of the track system by an independent hydrostatic drive, so that bulldozers can easily achieve pivot turn, greatly enhanced the mobility of the bulldozers and work suitability. Our unique control system of the engine closed-loop constant power control system, the central controller (CPU) load based on the size of bulldozers at any time suffered moderator pump swashplate angle control drive system flow to the machine to automatically according to the size of external load adjust speed, fully meet the bulldozers at work on speed and power requirements to ensure the efficiency of machine, to prevent overloading the engine and can make full use of engine power. TQ160A bulldozer driven by electric motor two-block variable motor, the whole block forward and backward are the two to meet the needs of different conditions. 2.5 Intelligent alarm systemTQ160A three bulldozers with complete intelligent alarm system, through the instrument panel meters, LED, buzzer and LCD monitors to keep it informed of the vehicle running all kinds of information, such as: engine temperature, oil pressure, hydraulic oil temperature,