Method for weighing electric excavator

Abstract

The invention discloses a method for weighing an electric excavator, which is used for solving the technical problem that the existing weighing method has large error. The technical scheme of the invention is as follows: taking a saddle center as a moment balance point, and establishing a right-angle coordination system with the point as an origin; determining an excavator rod and the gravity centers of parts and materials attached to the excavator rod, coordinates of elevating force and pushing force action points in the coordinate system when the excavator rod is arranged horizontally, wherein the force arm of the pushing force is equal to the y-coordinate of the pushing force action point, and calculating the coordinates of the points during weighing according to the movement track equation of the excavator rod, wherein the force arm of the gravity is equal to the x-coordinate of the gravity center during weighing; calculating the coordinates of point of tangency based on the position relation between the elevating force action point and an elevating steel rope on the right side of a pulley and the pulley tangency point during weighing, listing the linear equation of the steel rope, calculating the force arm of the elevating force with the distance from the saddle center to the line; calculating the elevating force and the pushing force according to the relation between the force for pushing and elevating a motor and the elevating force and the pushing force; and finally listing a moment balance equation to calculate the material weight.

Description

technical field [0001] The invention relates to a weighing method of an electric excavator, which is especially suitable for weighing the twist-free round shovel type electric excavator. Background technique [0002] Electric excavators are mainly used for excavating soil, rock, ore and coal in large-scale open-pit mines. According to different pushing methods, they are divided into rack and pinion push electric excavators and twist-free round shovel-bar electric excavators. In the past, in order to count the output of a single excavator, it could only be estimated by special personnel to record the number of loaded vehicles. This not only has many errors in the statistics, but also increases the investment of personnel. [0003] The Chinese patent with the application number 200710185462.5 announced a weighing method for a rack and pinion push type electric excavator. This method calculates the weight of the wire rope against the shovel through the relationship between the ...

AI Technical Summary

Problems solved by technology

[0004] Although the technical solution of this patent saves manpower, the calculation method ignores the influence of the gravity of the shovel rod and other parts attached to the shovel rod, so the material weight calculated according to this technical solution will have a relatively large error, and the patent The technical solution is not suitable for the electric shovel pushed by the wire rope

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