Mining electric shovel working device for electrohydraulic auxiliary operation motion

Abstract

The invention provides a mining electric shovel working device for electrohydraulic auxiliary operation motion, which belongs to the technical field of mining engineering machinery and aims to solve the problems that energy loss of an existing electric shovel working device is severe, and a lifting force utilization rate of a lifting steel wire rope is low. The mining electric shovel working device is mounted on an electric shovel body with a winding device, and is characterized by comprising a movable arm, a shovel loader, a bucket rod hydraulic rod and an auxiliary hydraulic cylinder. According to the design in the invention, an auxiliary hydraulic cylinder is additionally arranged to assist the bucket rod to lift, so that a steel wire rope stress condition is improved while the bucket rod is too high or too low, lifting force moment and digging force of the bucket rod hydraulic cylinder are improved; the auxiliary hydraulic cylinder can be used for recycling gravitational potentialenergy of the working device, so that energy waste is reduced; and the hydraulic cylinder is taken as a power source to control the bucket rod to extend out and draw back, so that push force of a pushmechanism is increased, and operation stability of the mechanism is improved.

Description

technical field [0001] The invention relates to the technical field of mining construction machinery, in particular to an electric shovel working device for electro-hydraulic auxiliary operation movement mining. Background technique [0002] Electric shovels are one of the most frequently used equipment in large construction projects and mining industries, and their main functions are excavation, loading and unloading, etc. The boom, stick, bucket and crown wheel are the main moving parts when the electric shovel excavates. The boom can rotate with the upper body, the stick can rotate around a point on the boom or stretch back and forth, and the bucket is fixed at the end of the stick. The traditional working device is driven by a motor, the rack and pinion drive the stick to expand and contract, and the hoisting mechanism drives the wire rope to go around the sky wheel to make the stick rotate. Due to its transmission form and structural characteristics, the lifting force...

AI Technical Summary

Problems solved by technology

Due to its transmission form and structural characteristics, the lifting force of the steel wire rope of the working device is easily limited to the torque of the stick, resulting in serious energy loss, insufficient lifting force in some working ranges, etc., thus affecting the working efficiency

[0003] The existing electric shovel has the characteristics of large installed power, high energy consumption and low power utilization rate

Especially when the stick is perpendicular to the ground or raised to a certain height, the wire rope tension and rack thrust on the stick are at a small acute angle, which offset part of the output force and result in a large waste of energy

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