Excavator big arm and small arm structure

Abstract

The invention provides an excavator big arm and small arm structure. One end of a big arm body is provided with a big arm fork. A small arm is connected to the big arm fork of a big arm. The big arm and the small arm are of hollow body structures. The hollow body structure of the big arm and the hollow body structure of the small arm are filled with padding. The excavator big arm and small arm structure is characterized in that the hollow body structure of the big arm and the hollow body structure of the small arm are not provided with feed and discharge openings for the padding. According to the lever principle, the excavator big arm and small arm structure achieves maximization of the excavating force output by equipment. As the sizes and the structures of the big arm and the small arm of an excavator are changed, the excavating force point of the big arm and the excavating force point of the small arm are closer to the center of a complete machine, the output force of the complete machine is maximum, and the complete machine is balanced and stable. As the big arm is not provided with the feed and discharge hole, the work safety of the big arm can be ensured. The weight of the padding of the big arm is designed according to the weight of the big arm required by the hardest rocks of rock soil conventionally excavated, and therefore the big arm can be comprehensively applied to various work environments.

Description

technical field [0001] The invention relates to engineering machinery, in particular to an excavator boom and forearm structure. Background technique [0002] Excavator is a kind of machine of construction machinery, which is used for digging and loosening soil in engineering fields such as construction, water conservancy, electric power, roads, mines, ports and national defense. It is widely used in hard rock layers for loosening soil. Need, the shape of the excavator is large, the excavator includes crawler excavator, wheel excavator, etc., the working part of the excavator mainly includes the ripper, the arm and the boom, the excavator also includes the cab, the main frame and crawlers etc. One end of the small arm of the excavator is connected to the ripper. The large arm is also called the boom. The large arm is connected to the small arm. It is an important working part of the excavator. The structural strength of this part directly affects the working performance of ...

AI Technical Summary

Problems solved by technology

[0004] However, in the actual practice effect, although the counterweight can be changed according to the excavated land, the inlet and outlet with plugs are in the work of the excavator. With the vibration of the filling of the counterweight, due to the use of welding or In other connection methods, the plugs of the inlet and outlet ports are connected to the boom and forearm, so the plugs may fall off due to vibration when the excavator is working, thus affecting the work of the excavator

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