Loader movable arm structure and loader

Abstract

The invention relates to a loader movable arm structure and a loader. The loader movable arm structure comprises a cross beam and lug plates. Each lug plate is arranged on the cross beam and is of a split structure, so that connecting cooperation between the lug plates and the cross beam is adjusted. According to the loader movable arm structure, on the premise of guaranteeing the enough fatigue strength of the lug plates, the machining precision of the cross beam can be reduced easily, and effective mounting between the lug plates and the cross beam can be achieved conveniently.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a loader arm structure and a loader. Background technique [0002] The arm of the loader is the main load-bearing structure during the operation of the loader. Due to the complex and diverse operating objects of the loader and the extremely harsh operating environment, the load on the working device changes drastically, which also leads to frequent damage to the working device, causing serious damage to engineering operations. Construction posed great difficulties. Such as figure 1 As shown, the loader boom mainly includes a boom plate 1', a beam 2' and an ear plate 3'. In engineering applications, it is found that the location where the loader arm is often damaged is the weld between the beam 2' of the loader and the boom plate 1' (such as figure 2 The first welding position A' shown), and the lower end welding seam where the beam 2' is connected with the ear plate 3' (s...

AI Technical Summary

Problems solved by technology

In actual engineering, the beam 2' is formed by butt welding of two U-shaped plates, and the geometric dimensions of the beam 2' are difficult to guarantee

And if Figure 5 As shown, the welding of the beam 2' and the boom plate 1' adopts unilateral welding. When the beam 2' is subjected to such Figure 5 For the load F shown, since there is no welding on the inner side of the beam 2', there is a stress concentration at the first welding position A', and the fatigue life is significantly reduced

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