China's current generation of truck crane products, operation of the lifting operation, a large area of application pilot proportional control, with good performance and precision control to fine-tune performance, low operating force, fatigue. Achieved by pilot proportional handle multiple load variable speed conveyor proportion to effectively prevent the phenomenon of secondary decline during the lifting operation, which greatly improves the safety of the lifting operation, reliability and operational efficiency.
Some large car telescopic cranes still use the single-cylinder latch arm stretching techniques, hydraulic pin action to be completed by a single hydraulic cylinder multi-sport festival outriggers, and achieve a variety of working conditions and the extent of control automatic retractable, can not change the past, plus an internal cylinder rope row practices, so that the crane is relatively lighter, expanding the space crane to a higher working height of development.
Truck cranes are mounted on a common vehicle chassis or a special crane chassis of the vehicle, the driving cab and crane cab set separately. The advantage of this crane is good mobility shift rapidly. The disadvantage is that when the work to be legs, can not load driving, not suitable for work on loose or muddy grounds. Truck crane chassis performance equivalent to the total weight of the truck the same vehicle, meet the technical requirements of road vehicles, which can be used freely on all types of roads. Such cranes are generally available on the control room off of two, when the job is necessary to extend the legs remain stable. Range from the weight of large, from 8 tons to 1,000 tons, the number of axles chassis, from 2 to 10. Is the largest output, the most widely used type of crane.
The following requirements for crane 16t lifting the monitor settings, 16t and 16t crane above the torque limiter settings, and there is an alarm device. Hydraulic truck crane boom arm segments by multi-section can be based on different lifting height requirements of the design. The telescopic boom is a sequential way of stretching, and the other is a synchronous telescopic. Large tonnage crane lifting capacity in order to improve the most are using synchronous telescopic. Telescoping sections of each arm by hydraulic control, flexibility. Crane with a jib when traveling state, the secondary arm is generally placed in the side or bottom of the main arm. Turntable is mainly used to layout the hoisting mechanism, slewing mechanism, under the fulcrum of the boom and luffing cylinder and controls. For medium and large-tonnage cranes, and some are still on the turntable placement engine. Slewing ring can withstand connection with vertical load, horizontal load and overturning moment between the turntable and the chassis. In order to prevent the occurrence of slip when driving turntable with turntable locking device. Slewing mechanism is driven by quantitative motor. Output gear slewing mechanism and slewing gear.
In the course of the international market, China's auto industry in recent years, cranes rapidly improve the quality level, has also been highly appreciated by the international ⑶ support, the products, the use of standardized, high professional quality user feedback ratio of export quality products in a marked decrease over the product to reflect the better. This is all for the development of Chinese automobile crane industry has laid a good foundation. Truck Crane mainly by hoisting, luffing, slewing, boom and vehicle chassis components. Since the development of hydraulic technology, electronics, high-strength steel and automotive industries, and promote the development of the automobile crane. Since the major work to prepare for a long time mechanical drive truck crane has been replaced by a hydraulic truck crane.