Tower crane introducing platform structure

Abstract

The invention provides a tower crane introducing platform structure, which comprises an introducing platform, a pull rod and a turning lifting mechanism, wherein the introducing platform has a hinge part which is hinged with the main body of the tower crane; the first end of the pull rod is connected to the main body of the tower crane, while the second end of the pull rod is connected to the introducing platform; and the turning lifting mechanism drives and is connected to the introducing platform, so as to ensure the introducing platform to turn around the hinge part. The tower crane introducing platform structure provided by the invention can prevent the interference of a hook and the platform and reduce potential safety hazard, meanwhile the structure can reduce the introducing platform size, so that the structure is convenient for use and transportation.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a tower crane introduction platform structure. Background technique [0002] Existing luffing jib tower cranes, especially small and medium-sized luffing jib tower cranes, mostly adopt the lower introduction method in the process of jacking and adding joints. Since the introduction angle of the luffing jib tower crane is generally between 84° and 86°, when the length of the jib is long, the distance between the hook and the center of the tower body is far when the standard section is introduced, so the introduction platform is required to be extended The length must be longer, so that when the luffing jib tower crane is working at a large angle (small range), the hook is easy to interfere with the introduction platform, which affects the effective working range and safety of the tower crane. [0003] At the same time, unlike hammerhead towers and platform towers, the range o...

AI Technical Summary

Problems solved by technology

The shortcoming of this scheme is: (1) single introduction platform 21 is made up of single platform, and its extension length can not be changed in the normal working process of tower crane, in the big angle (small amplitude) of jib frame, especially under the condition of short jib length, The hook is easy to interfere with the platform, which not only affects the effective working range of the luffing jib tower crane, but also has potential safety hazards, which affects the safety of the luffing jib tower crane

(2) The imported platform 21 is large in size, small in rigidity, and inconvenient for transportation

The disadvantages of this scheme are: (1) Although the outer introduction platform 24 of the introduction platform can be turned over, it lacks a corresponding turning auxiliary device, which makes turning over inconvenient, and the turning speed is uncontrollable, which easily causes the platform to shake, and there are potential safety hazards when working at heights

(2) Although the extended length of the introduced platform can be shortened, the shortened length is fixed. In the case of a short arm length, the extended length of the introduced platform is still relatively long (for the convenience of turning over, the introduced platform 24 is relatively short), and the large angle While working, the hook may still interfere with the platform

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