Crane arm support system and crane

Abstract

The invention provides a crane arm support system which comprises a plurality of sections of telescopic arms, a truss girder and a luffing mechanism, wherein the plurality of sections of telescopic arms are embedded; one end of the head section of telescopic arm is hinged with a rack of a crane; the end part of the tail section of telescopic arm is provided with a main arm head; one end of the mounting groove truss girder is hinged with one end of the mounting groove main arm head; the other end of the mounting groove truss girder is connected with one end of the luffing mechanism; the other end of the mounting groove luffing mechanism is hinged with the other end of the mounting groove main arm head; and the length of the part of the mounting groove truss girder, which extends out of the mounting groove main arm head, can be regulated by the mounting groove luffing mechanism. The invention also provides the crane. According to the technical scheme provided by the invention, the lifting height of a main crane arm can be sufficiently utilized, the lifting performance is not influenced and under the same amplitude, the main arm can lift by a larger height; the crane arm support system is convenient to use and does not need to be additionally disassembled and assembled when being transferred in a short distance on the midway; and the crane arm support system is directly arranged at an auxiliary arm mounting position of the main arm head, has simple structure, is convenient to assemble and disassemble and does not influence the application of an auxiliary arm and a tower arm.

Description

technical field [0001] The invention relates to the field of engineering machinery, and more specifically, to a crane jib system and a crane including the crane jib system. Background technique [0002] In large-tonnage cranes, the lifting performance requirements for the boom are: it can be lifted higher and heavier, especially during the installation of wind power equipment. [0003] Such as figure 1 As shown, since the main jib 7` on the crane is straight, the length of the entire main jib 7` cannot be fully utilized when hoisting a heavy object 5`. For example, the total length of the main jib 7` is 90 meters, 17 The maximum lifting height can reach 89 meters when the range is 1.5 meters, but in actual lifting, when lifting 75 meters to 80 meters, the heavy object interferes with the main arm and cannot continue to rise. Such as figure 1 As shown, when the angle between the main boom 7` and the turntable 6` is α, the range between the hook (that is, the wire rope 4`) ...

AI Technical Summary

Problems solved by technology

[0006] In summary, there are the following problems in the above-mentioned prior art: the maximum hoistable height of the main boom cannot be fully utilized; the installation and use of the jib is relatively complicated; It is troublesome when transferring to a nearby venue

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