Fly jib auxiliary mounting device and crane

Abstract

The invention provides a fly jib auxiliary mounting device and a crane; the fly jib auxiliary mounting device is mounted on a jib head of a main jib, and comprises a rocker jib; the rocker jib is hinged with the jib head; the rocker jib can swing under the action of the main jib to push the fly jib to move so as to align a pin hole on a fly jib joint fork with a pin hole on a main jib head shaft. The fly jib auxiliary mounting device provided by the invention is small in size, compact in structure, easy to mount, and low in manufacturing cost, needs no additional power supply, and thus greatly reduces the cost of the whole crane; the angle of the rocker jib is adjustable; the docking speed of the fly jib and the main jib is increased significantly; the pin hole on the fly jib joint fork can be aligned with the pin hole on the main jib head shaft rapidly; and the equipment working efficiency and the product market competitiveness are improved.

Description

Technical field [0001] The present invention relates to the field of construction machinery, and in particular to a jib auxiliary installation device and a crane including the jib auxiliary installation device. Background technique [0002] At present, the installation and adjustment of the jibs of domestic medium and small tonnage truck cranes basically do not take effective measures to facilitate their installation. Manually knock in the pins to connect the jibs, which is difficult to assemble, laborious and time-consuming. However, some foreign benchmark products generally adopt adjustment devices to facilitate the installation of the jib, such as hydraulic jacks, forks and aligning cylinders, etc., to achieve accurate and quick installation of the jib. [0003] The technical problems of related technologies are: [0004] 1) Due to the downward bending moment caused by the weight of the jib, it is difficult to align the hole on the jib fork with the hole on the main boom head sha...

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the downward bending moment generated by the self-weight of the jib, it is difficult to align the hole on the jib yoke with the hole on the head shaft of the main jib;

[0005] 2) It is difficult, time-consuming and labor-intensive to directly knock in the plug manually, which is unacceptable;

[0006] 3) Specially increase the hydraulic cylinder, resulting in an increase in cost;

[0007] 4) Alignment of the fork to the oil cylinder installation has high requirements on the manufacturing process of the auxiliary arm

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