Crane

Abstract

The invention relates to a crane which comprises a travelling chassis, a rotary platform, a tower body, a suspension arm, a lateral support and a variable-amplitude support arm, wherein the rotary platform is arranged on the travelling chassis and can rotate for 360 DEG; the tower body is positioned on the rotary platform; the suspension arm, the lateral support and the variable-amplitude are arranged at the upper end of the tower body; at least one of the tower body and the suspension arm consists of box-type expansion joints; the lower end of the tower body is articulated to the rotary platform, and the lateral support, the variable-amplitude and the suspension arm are connected to the upper end of the tower body through hinge shafts; the lateral support consists of three lateral supports which are respectively arranged at the left side, the right side and the rear side of the top of the tower body; the suspension arm is positioned at the front side of the tower body; the variable-amplitude support arm is positioned at the top of the tower body; the longitudinal centre lines of the rear lateral support positioned at the top of the tower body, the variable-amplitude support arm and the suspension arm are coplanar and intersected with the longitudinal centre line of the tower body; and the middle part and the root of the first expansion joint at the lower end of the tower bodyare respectively provided with at least one hydraulic cylinder used for realizing the flat or vertical placement of the tower body in an articulating way, and the other end of the hydraulic cylinder is articulated to the rotary platform.

Description

technical field [0001] The invention relates to a lifting device, in particular to a crane. Background technique [0002] In recent years, civil construction has developed rapidly, and its corresponding equipment manufacturing industry, especially lifting equipment, has also developed. The application field of large tonnage and high-altitude lifting equipment is gradually expanding. Taking wind power installation as an example, due to the demand of the energy market or the quick success of investors, the development speed of wind power equipment is getting faster and faster, and the equipment specifications are getting bigger and bigger. However, the suitable installation equipment cannot match it well, and this dilemma has seriously restricted the development of the wind power industry in the direction of high precision. At present, most of the hoisting of wind power equipment uses crawler cranes of 500 tons and above to complete the operation. Most of this equipment uses...

AI Technical Summary

Problems solved by technology

However, the corresponding installation equipment cannot match it well. This dilemma has seriously restricted the development of the wind power industry in the direction of high precision.

At present, the hoisting of wind power equipment mostly uses crawler cranes of 500 tons and above to complete the work. Most of this equipment uses truss structure booms, which are expensive, bulky and inconvenient

In order to solve the many inconveniences caused by the crawler crane when installing wind power equipment, patent CN200820149025.8 discloses a self-propelled tire-boom special crane for wind power, which effectively avoids the problem of crawler crane walking inconvenience

However, due to the unsatisfactory structure of the equipment disclosed in this patent, the lifting arm is too large, which causes the vehicle to be too large

Patent CN201538655U also discloses a special crane for hoisting wind power equipment. Although this equipment has a tower body device, which solves the problem of too large lifting boom, it cannot automatically shrink because the tower body and boom adopt a truss structure, and During the transition, there must be workers working at heights to complete the multi-stage folding, fixing, disassembling and assembling the pin shaft of the boom, which seriously affects the efficiency of the vehicle transition.

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