Inadequate crane industry: basic components, basic research and development lags behind.

Through research and development, technological innovation, the introduction of digestion, China tower bridge gantry crane  business tools and accessories designed production capacity have made great progress, advanced computer design, microelectronic technology, remote monitoring and other technologies are tower crane has been applied. But the Chinese tower crane technical performance, production quality, variety and reliability models, compared with developed countries, there are still gaps, mainly reflected in: the reliability of domestic components, such as electrical components, hydraulic components, transmission components; process equipment, laboratory equipment and testing means not complete; basic research is not deep enough, such as the local structure of quantitative analysis and reliability studies. This has affected our whole product quality and reliability, increased accidents.

In addition, the transmission mechanism configured low tower  eot crane  has become a constraint to improve technical performance bottleneck, the host development are severely constrained. Transmission mechanism to use more than the backward speed control mode, the impact of large speed range is narrow. Hoisting mechanism is still much lower transmission efficiency using a soft tooth cylindrical gear reducer, using pole squirrel cage motor speed, two-speed motor winding plus eddy current brake governor, RCS dual motor speed; slewing mechanism to use more around line speed motor plus fluid coupling;hoist gantry crane luffing mechanism of multi-use multi-speed motor speed.