Main lug structure and crawler hoisting rotary table with same

Abstract

The invention relates to a main lug structure and a crawler hoisting rotary table with the same. The main lug structure of the crawler hoisting rotary table comprises a main lug and a main arm bottom joint beam limiting structure, wherein a main arm hinging point hole is formed in the main lug; the main arm bottom joint beam limiting structure is welded below the main arm hinging point hole in the side surface of the main lug and is provided with an internal cambered surface which is formed together with the main arm hinging point hole; the central axis of the internal cambered surface coincides with that of the main arm hinging point hole. According to the invention, the coaxial accuracy between the main arm bottom joint beam limiting structure and the main arm hinging point hole can be ensured.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a main lug structure of a crawler hoisting turntable and a crawler hoisting turntable provided with the main lug structure of the crawler hoisting turntable. Background technique [0002] figure 1 Shown is a structural schematic diagram of a crawler hoist turntable in the prior art; figure 2 Shown is figure 1 The enlarged schematic diagram of part A in the middle. Such as figure 1 , figure 2 As shown, the crawler hoisting turntable 1' is used as a key structural part connecting the boarding and disembarking of the truck. The hydraulic oil tank, fuel tank, engine system and other components and mechanisms are placed inside. parts are connected. figure 2 Shown is an enlarged schematic diagram of the main ear plate 2' connected to the bottom joint arm of the main arm (not shown in the figure). The main ear plate 2' has a hinge point hole 3' of the main arm, and the bott...

AI Technical Summary

Problems solved by technology

[0004] Since the limit structure 4' of the bottom joint arm of the main arm needs to be welded on the main ear plates 2' on both sides of the turntable when the bottom joint arm of the main arm is assembled with the turntable of the crawler crane, and the limit structure 4' of the bottom joint arm of the main arm is Formed by cutting a single plate, it is difficult to control the matching accuracy with the outer arc surface of the mounting plate of the bottom section arm of the main arm

At the same time, the coaxial accuracy of the inner circular arc surface of the bottom section arm limit structure 4' of the main boom and the hinge point hole 3' of the main arm cannot be guaranteed, which affects the use effect of the bottom section arm limit structure 4' of the main arm

In addition, on-site matching welding will also reduce the assembly efficiency of the main arm bottom section arm

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