Introduction and understanding of aerial vehicles ◠ High altitude truck A vehicle-mounted aerial work vehicle is a type of vehicle that operates at a distance of more than 3 meters and is operated by a hydraulic or electric system that controls multiple hydraulic cylinders and can be lifted up and down. The hydraulically-powered manned aerial vehicles are contemporary advanced species mechanical equipment. The construction workers use the aerial vehicles to lift off the work. As long as they are used correctly, safety is guaranteed. However, it is not a proper operation or security measures have been implemented. It is also a very dangerous master air operation procedure. use The boom type aerial work vehicle can overhang the work, cross over certain obstacles, or can perform multi-point operations at one lift; the platform has a large carrying capacity and can be used by two or more people at the same time and can carry certain equipment; the lifting platform is moved Good sex, easy to transfer venues; beautiful appearance, suitable for indoor and outdoor operations and storage. Applicable to stations, docks, shopping malls, stadiums, residential properties, factories and mines and other large-scale operations. Trailer-type boom-armed aerial platforms are easy to move, compact in structure, use new high-quality steel, high strength, light weight, direct access to AC power, or start with their own DC power supply. The erection speed is fast, and the worktable can be raised. Horizontally extended, it can also be rotated, easily reaching obstacles to reach the working position, is the ideal high-altitude operation equipment. ◠Classification of aerial vehicles  Vertical lift type (also known as scissor type) aerial work vehicle, folding arm lift type aerial work vehicle, self-propelled aerial work platform, telescopic boom type aerial work vehicle, boom type aerial work vehicle, set of cylinder type aerial work truck, Aluminum aerial work vehicles, self-loading garbage trucks. Among them, the vertical lifting work load is significant, but the operation height is limited, and the mobility is not good and it is inflexible. At present, the domestic boom-lifting type aerial work vehicle is widely used in China. In addition, it can also be divided into vertical lift type (also known as scissor type) aerial work vehicles, folding arm lift type aerial work vehicles, self-propelled aerial work platforms, telescopic boom type aerial work vehicles, boom type aerial work vehicles, sets of Cylinder aerial work vehicles, aluminum-type aerial platforms, self-loading garbage trucks. Among them, the vertical lifting work load is significant, but the operation height is limited, and the mobility is not good and it is inflexible. At present, the domestic boom-lifting type aerial work vehicle is widely used in China. Scissor lift trucks are widely used special equipment for aerial work. Its scissors mechanical structure makes the lifting platform have a high stability, a large working platform and a high carrying capacity, which makes the work scope of aerial work larger and suitable for many people to work at the same time. It makes high-altitude operations more efficient and safer. ZSJY series self-propelled hydraulic lifting platform's main features are: the use of personnel can control the machinery to go up and down without going down the lift table, control equipment can be run on the table to other workplaces. The device itself has a walking and steering drive function, no manual traction, no external power supply. It is an ideal aerial work equipment for efficient and safe production of modern enterprises.  　 The telescopic aerial work platform is a product that can serve high-altitude operations, equipment installation, overhaul and other movable aerial work in various industries. Telescopic aerial work platforms are mainly divided into straight arm type aerial work platforms and bent arm type aerial work platforms . It is mostly used in places with high requirements, such as shipyards. Such machines are safe, easy to move, but costly.  The boom-type aerial work vehicle is easy to move and has a compact boom structure. The new high-quality steel is used for high strength and light weight. It can be directly connected to AC or powered by the vehicle's own power. The erection speed is high, and the boom can be raised. It can also be extended, it can also be rotated 360 degrees, easy to reach the working position across obstacles, is an ideal high-altitude equipment. The cylinder-type aerial work vehicle is a multi-purpose aerial work machine, and its function conveys the operating personnel and the platform on which the equipment is used to the special engineering equipment at a specified altitude for aerial operations. This equipment is widely used in high-altitude operations such as industrial and mining workshops, high halls, warehouses , stations , and plazas . The whole machine consists of platform, telescopic cylinder, single ladder type or double ladder type anti-rotation mechanism, chassis tank, outriggers, and walking wheels. The platform has a telescopic cylinder that lifts directly. When the motor is started, the motor drives the gear pump to supply oil. The oil is fed through the one-way valve and the electromagnetic channel to the cylinder. The telescopic cylinder rises section by section. When the platform is raised to the maximum height, the system pressure is also The rated working pressure is reached. At this time, the spill valve is unloaded and the hydraulic pressure is maintained at a constant working pressure. After the stoppage, the check valve maintains pressure, and the platform stays at the maximum working position. The platform can be used according to the working height of the site. Stay at any position below the maximum height. ◠ High-altitude truck features Operating devices are installed in the work bucket and rotary seat to remotely control engine start/stop, high speed/low speed, and electro-hydraulic proportional valves are used to control the movement of the arm. The stability is good, and the working arm can be left and right 360° continuous. Rotation, automatically maintains the working tank level by the linkage mechanism, the emergency pump down operation tank can be operated when the main pump fails, with night lighting, lifting heavy objects. Products are widely used in power, street lamps, municipal, gardens, communications, airports, construction (repair) ships, transportation, advertising, photography and other high-altitude operations. New full hydraulic self-propelled chassis Developed a self-propelled aerial work platform truck with completely independent intellectual property rights, using electromechanical-hydraulic integration, reliability design, and computer-aided design technologies, successfully developed a fully hydraulically driven, self-propelled special chassis that broke through. In the past, domestic high-altitude lifting platform trucks could only be limited by the design of the vehicle or crane chassis modifications. Running with load, good job stability The chassis structure breaks through traditional design theories and methods, and reduces the center of gravity offset by optimizing the overall layout and load distribution of the platform. Using a unique large-angle back-up hinge structure, a variety of counterweight modules are properly set to effectively balance the working torque. Adopting the H-type variable cross-section composite box girder frame and high-load solid rubber tires, the overall stiffness of the chassis is increased, the stability of the whole machine running and working process is ensured, and the function of the high-altitude operation platform vehicle to carry the load is realized. Multifunctional, versatile working device Through the boom front end bracket, a lifting device or a passenger platform can be quickly installed to realize functions such as material lifting, hoisting and hoisting, and manned aerial work, and at the same time, an interface is provided for rapid switching of the extension work device and various work devices. . Unique three-dimensional rotating lifting device The designed three-dimensional rotating lifting device can not only automatically maintain the attitude of the lifted material, but also can achieve the adjustment requirements of lifting material at any height, any position and any direction in the space. The speed control is precise and sensitive, and the micro-motion performance is good. Satisfy the requirements for the installation of aerial work and ventilation ducts in large caverns. 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