Digging arm of excavator

Abstract

The invention relates to a digging arm of an excavator. The digging arm comprises a main arm and a rotary arm movably connected with the main arm, wherein an end part of the main arm is provided withconnection members; the rotary arm is provided with a rotary supporting point and fixed supporting points; the connection members are movably connected with the fixed supporting points on the rotary arm; the main arm is provided with fixed seats; a main air cylinder is movably connected to the fixed seats; an air cylinder rod of the main air cylinder is connected with the rotary supporting point on the rotary arm; the main arm is provided with an accommodating groove corresponding to the main air cylinder; a plurality of start air cylinders are fixed to the bottom of the accommodating groove;the end parts of the start air cylinders are connected with separation plates; and each separation plate is provided with an arc-shaped groove matched with the circumferential surface of the main aircylinder. During the use, the start air cylinders drive the separation plates to rise, so the main air cylinder is pushed out of the accommodating groove; the separation plates connected with the start air cylinders close to one side of the rotary arm are controlled to a highest position, and the main air cylinder has a certain inclined angle corresponding to the main arm; and the main air cylinder can drive the rotary arm to rotate with least effort and damages.

Description

Technical field [0001] The invention relates to an excavator component, in particular to an excavating arm of an excavator. Background technique [0002] Excavators, also known as excavating machinery, also known as excavators, are earth-moving machinery that use a bucket to excavate materials above or below the bearing surface and load them into transport vehicles or unload them to a stockyard. The materials excavated by the excavator are mainly soil, coal, silt, and pre-loose soil and rocks. From the perspective of the development of construction machinery in recent years, the development of excavators has been relatively rapid. Excavators have become one of the most important construction machinery in engineering construction. The excavator arm is an important part of the excavator, which can transmit power and increase Due to the large support strength, the main cylinder on the current excavating arm needs to be inclined at a certain angle relative to the main boom when it i...

AI Technical Summary

Problems solved by technology

Judging from the development of construction machinery in recent years, the development of excavators is relatively fast. Excavators have become one of the most important construction machinery in engineering construction. The excavator is an important part of the excavator, which plays the role of transmitting power and accelerating Due to the large support strength, the main cylinder on the current excavating arm needs to be tilted at a certain angle relative to the main arm when it is working, but the angle of the main cylinder is not easy to adjust, resulting in damage to the main cylinder during the use of the excavating arm

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