Working arm frame of excavator and excavator

Abstract

The invention relates to the technical field of a mechanical shovel-like excavator which is special equipment for mining a large-scale open-pit mine, and particularly relates to a working arm frame ofan excavator and the excavator. The working arm frame comprises a lower arm frame, a support rod, an upper arm frame and a top pulley, wherein the lower end of the lower arm frame is hinged to a working platform, the upper end of the lower arm frame is hinged to one end of the support rod, the other end of the support rod is hinged to the top of an A-shaped frame, the lower arm frame, the supportrod and the A-shaped frame form a triangular support structure, the lower end of the upper arm frame is hinged to the upper end of the lower arm frame, the top pulley is arranged on the upper end ofthe upper arm frame, the upper end of the upper arm frame is connected with the top of the A-shaped frame by virtue of a pull rope, and a bucket rod and a pushing device are arranged on the lower armframe. According to the structure, the stressed structure of the working arm frame is optimized, the bending moment of the lower arm frame in the pushing process of the bucket rod is reduced, and theworking performance of the whole machine is improved; the support rod is additionally arranged on the arm frame, so that the possibility that the machine is damaged by the jacking of the working arm frame when a bucket is gnawing at the bottom is avoided.

Description

technical field [0001] The present disclosure relates to the technical field of excavators, in particular to a working arm frame of an excavator and the excavator. Background technique [0002] The mechanical front shovel excavator of related technology, also known as mining excavator, is a kind of special equipment used for open pit mining. The working mechanism of the excavator mainly includes A-frame, lifting arm, stick, Buckets, pushing devices, lifting devices, guy ropes and traction ropes, etc. During operation, the bucket completes the excavation of materials under the joint action of the lifting force of the wire rope and the thrust of the pushing gear. The bucket filled with materials and the upper part of the entire machine rotate at a certain angle under the action of the slewing device. The bucket is located in the transportation When the vehicle is above, the bottom of the bucket is opened to unload the material, and then the upper part of the whole machine is ...

AI Technical Summary

Problems solved by technology

[0003] During the operation of this type of excavator, when the bucket excavates the material at the bottom of the front end of the pile, the lifting force is small, and the pushing mechanism pushes out the stick with all its strength. The arm rotates around the heel and the stay rope relaxes (this situation is called "gnawing the root" in actual work). At this time, if the boom is lowered by inertia, it will have a great impact on the stay rope, thereby shortening the stay rope and related parts. life span

In addition, due to the large weight of the overall boom, the corresponding machine counterweight is also large, both of which increase the weight of the whole machine, increase the useless work of the machine, and then affect the performance of the machine

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