An ear plate structure with equal and collinear stress and construction machinery

Abstract

The invention discloses a lug plate structure with equal and colinear stress, and an engineering machine, belonging to the field of machine manufacturing. The lug plate structure comprises a box structure and a lug plate assembly, wherein the box structure comprises a top plate 10 with a bent end, and a bent rear bent plate 8, the bent end of the top plate 10 is connected with the rear bent plate 8, the lug plate assembly comprises two upper lug plates 5 arranged on the top plate 10 of the box structure, one end of each upper lug plate 5 is connected with the top plate 10 and is adjacent to the bent end of the top plate 10, and the tangential direction of the other end of each upper lug plate 5 is the same as that of the bent end of the top plate 10. According to the technical scheme, the lug plate structure with a colinear design is adopted, and the tangential direction of each lug plate is the same as that of the top plate, so the overall stress is homogenized, the stress on the bent plate and a butt welding seam is reduced, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of mechanical equipment manufacturing, and relates to a lug structure, in particular to a lug structure with equal and collinear stress and engineering machinery. Background technique [0002] At present, the stick mostly adopts the stick body composed of side plates and coaming plates, plus a pair of bucket cylinder lugs and another pair of stick cylinder lugs. Paste the reinforcement plate to make the overall stress distribution more uniform. [0003] In the prior art, the reinforcing plate is mostly welded between the two lug plates to reduce the average stress, make the stress distribution more uniform, and improve the strength of the stick. But this method has the following disadvantages: [0004] 1) The body of the stick is welded with a plate, which increases the heat input of the whole stick and easily causes deformation of the plate during welding; [0005] 2) A large number of welding processes are used a...

AI Technical Summary

Problems solved by technology

[0004] 1) The body of the stick is welded with a plate, which increases the heat input of the whole stick and easily causes deformation of the plate during welding;

[0005] 2) A large number of welding processes are used after the sticks are assembled, which reduces the production efficiency. At the same time, some long reinforcing plates overlap with the welding seam, which may easily cause welding defects;

[0006] 3) The stick is welded too much, and the appearance is not beautiful

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