Inter-arm positioning method and structure of crane boom, crane boom and crane

Abstract

The invention provides a method and a structure for inter-arm positioning of a crane jib, the crane jib and a crane. The method for the inter-arm positioning of the crane jib comprises the following steps of: determining a plurality of operating positions of inner knuckle arms on outer knuckle arms; measuring the arm inner widths of the inner knuckle arms at the plurality of operating positions on the outer knuckle arms and the symmetry of the inner knuckle arms relative to the centre line of the outer knuckle arms; and determining the thickness and the shape of a positioning piece according to the arm inner widths and the symmetry. By the method for the inter-arm positioning of the crane jib, reciprocating correction of the inner knuckle arms and the outer knuckle arms is eliminated, theproduction cost is effectively lowered, and the production efficiency is improve. The structure for the inter-arm positioning of the crane jib ensures the reliable matching of the inner knuckle arms and the outer knuckle arms at the operating positions. By the crane jib with the structure for the inter-arm positioning of the crane jib, the operation stability is ensured while the production cost is lowered and the production efficiency is improved. The crane with the crane jib can acquire a more reliable and safer operating state.

Description

technical field [0001] The invention relates to the field of cranes, in particular to an inter-arm positioning method and structure of a crane arm, a crane arm and a crane. Background technique [0002] Most of the existing crane booms are multi-section arms, and each section arm is set in sequence. In order to ensure that the center line of each section arm can coincide with the arm set on its outer layer, and it will not overlap with the arm set on its outer layer after extending out. When the arm deviates, sliders are often set on the outer surface of the inner section arm. Such as figure 1 As shown, the slider 3 is installed on the inner section arm 2. During the working process, the inner section arm 2 moves back and forth in the outer section arm 1. The slider 3 always keeps in contact with the inner surface of the outer section arm 1 to ensure that the inner section arm 2 is in contact with the outer section arm 1. The center lines of the outer jib 1 coincide to pre...

AI Technical Summary

Problems solved by technology

[0003] However, if the positioning of the inner jib 2 and the outer jib 1 is realized in the above-mentioned manner, the manufacturing precision requirements of the outer jib 1 and the inner jib 2 are very high, and the lateral width of the outer jib 1 and the inner jib 2 needs to be ensured Consistency in the length direction of the arm barrel, otherwise the inner section arm 2 will bend to a certain side after it is fully extended from the outer section arm 1. To meet this requirement in the actual production process, it is necessary to use a specific The process method repeatedly corrects the outer jib 1 and the inner jib 2, which will significantly increase the manufacturing cost and reduce the production efficiency

Images