Automatic adjusting device for horizontal stretching and shrinking of supporting legs and crane

Abstract

The invention belongs to the technical field of engineering machines and provides an automatic adjusting device for horizontal stretching and shrinking of supporting legs. The automatic adjusting device for horizontal stretching and shrinking of the supporting legs comprises a fixed box body, the telescopic supporting legs and a horizontal oil cylinder, and further comprises automatic adjusting mechanisms; the two sets of automatic adjusting mechanisms are arranged, and arranged on the upper side and the lower side of a movable box body correspondingly; the automatic adjusting mechanism located on the upper side of the movable box body is installed at the end, away from the supporting legs, of the movable box body; the automatic adjusting mechanism located on the lower side of the movablebox body is installed at the end, close to the supporting legs, of the fixed box body; the two automatic adjusting mechanisms always apply the changing reactive force to the movable box body through the horizontal reciprocating movement of the movable box body, and the reactive force is matched with the gravity generated by the telescopic supporting legs and the horizontal oil cylinder, so that itcan be guaranteed that the movable box body is horizontal. The automatic adjusting device for horizontal stretching and shrinking of the supporting legs achieves automatic adjustment of the supporting legs in the horizontal telescopic process, it can be guaranteed that the supporting legs can keep the horizontal telescopic state all the time, the service life of the oil cylinder and supporting leg structural pieces is prolonged accordingly, the structure is simple, the manufacturing cost is low, and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an automatic adjustment device for horizontal expansion and contraction of outriggers and a crane. Background technique [0002] A crane refers to a multi-action hoisting machine that lifts vertically and carries heavy objects horizontally within a certain range. With the continuous growth of the national economy, the continuous progress of infrastructure construction and the outbreak of the logistics market, cranes are used more and more widely in hoisting, maintenance, emergency rescue and other fields, and outriggers are an indispensable part of the construction machinery industry. The crane has an effective guarantee of sufficient safety and stability during work. [0003] When the movable outriggers of the crane are slowly stretched out, the weight of the movable outriggers and the front vertical oil cylinder itself will generate a vertical downward gravity. S...

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Problems solved by technology

[0003] When the movable outriggers of the crane are slowly stretched out, the weight of the movable outriggers and the front vertical oil cylinder itself will generate a vertical downward gravity. Since the tolerance may be larger than the design size in the process of making the horizontal outriggers, This will cause the outriggers to extend out in a tilted state, which will cause the horizontal oil cylinder and vertical oil cylinder to be in a tilted state for a long time, causing damage to the oil cylinder and outrigger components, thereby affecting the service life of the oil cylinder and outriggers. The horizontality is always maintained during the process. In the prior art, manufacturers usually control the manufacturing accuracy of the structural parts to achieve the horizontal extension of the outriggers, but the manufacturing cost is high. In addition, in order to ensure the horizontality of the outriggers when the crane is working, usually The following adjustment methods are adopted: one is to add pads at the end of the outrigger box, but the added pads are not adjustable, and it will have no effect after a period of use; the other is adjustable, but it needs to be adjusted manually. It is very troublesome and the adjustment steps are cumbersome. If the user does not adjust manually, the oil cylinder will be damaged or the structural parts will be damaged.

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