The New Development Trend of Mobile Jib Cranes

The mobile jib crane is made of thin-walled profiles and special-shaped steel. This structure reduces the number of splicing welds in the structure and improves fatigue resistance. A variety of new high-strength low-alloy steel materials are used to improve the bearing capacity, improve the stress conditions, reduce the self-weight and increase the appearance of beauty. Most of the bridge structure types of bridge mobile jib cranes adopt box-shaped four-beam structure. The main beam and the end beam are connected by high-strength bolts, which is more convenient for transportation and installation.

In order to reduce the dead weight, improve the bearing capacity, improve the processing and manufacturing conditions, and increase the success rate of the product, the parts and components should be welded instead of cast as much as possible, such as the reducer shell, coil simplification, pulley, etc. The reducer gears are all made of hard tooth surfaces to reduce their own weight, reduce their volume, improve their bearing capacity and increase their service life. In addition, the motors used in various mechanisms are developing towards high speeds.

In terms of electronic control, mobile cantilever cranes develop speed regulation systems and electronic control systems with good performance, low cost and high reliability, and develop semi-automatic and fully automatic operations. The electromechanical, instrumental and hydraulic integration technology is adopted to improve the performance and reliability and increase the functions of the mobile cantilever crane.