a mobile crane

Abstract

The invention discloses a mobile crane, and relates to a crane. The mobile crane comprises a base, wherein a machine rod is arranged on the base, a first rotary shaft is arranged on the machine rod, a balance arm is rotationally arranged on the first rotary shaft, a sliding sleeve is movably arranged on the balance arm, a second rotary shaft is arranged on the sliding sleeve, a lifting arm is rotationally arranged on the second rotary shaft, and a supporting sleeve is further arranged on the machine rod in a sliding manner, a third rotary shaft is arranged on the supporting sleeve, a supporting arm is arranged on the third rotary shaft, a fixed sleeve is arranged on the lifting arm in a sliding manner, a fourth rotary shaft is arranged on the fixed sleeve, the fourth rotary shaft is connected with the supporting arm, a plurality of movable folding supporting pillars are evenly arranged on the base with the machine rod as the center of a circle in a circumferential manner, and fixing mechanisms are arranged at the ends of the folding supporting pillars. Compared with the prior art, because the mobile crane is provided with the adjustable lifting arm and has more abundant fixing manners, the load moment can be adjusted according to the weight of lifted objects, the height that the lifted objects need to reach, and the positions where the lifted objected are located, and the crane is kept stable.

Description

technical field [0001] The invention relates to a crane, especially a mobile crane. Background technique [0002] Crane is a popular name for cranes, which are widely used in a series of heavy industrial products such as ships, equipment, machinery, and molds. In terms of size, cranes are divided into small cranes and large cranes. The large cranes are basically fixed, and the small cranes are basically mobile. The small crane is also called a hoist, a small hoist, and a portable hoist. It is a small mechanical equipment with excellent performance and extremely wide application. Universally applicable to all walks of life. For the construction field, small cranes are suitable for lifting operations of high-rise buildings, such as various building materials and various decoration materials, especially for long and wide materials such as wooden boards and woodworking boards that are inconvenient to carry in corridors. unique advantage. However, compared with the fixed lar...

AI Technical Summary

Problems solved by technology

However, compared with the fixed large cranes, the small cranes are not only far inferior to the large cranes in terms of lifting capacity, but also far inferior in the stability of the entire crane. Because of the different fixing forms, once the small crane is operated Improper operation is very prone to overturning and causing accidents

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