A variable curvature excavator bucket

Abstract

The invention discloses an excavator bucket with variable curvature. The excavator bucket with the variable curvature comprises a left side plate and a right side plate which are arranged in parallel and are connected through a hopper bottom plate, wherein the two ends of the hopper bottom plate are respectively connected with a hopper front wall plate and a hopper rear wall plate; the hopper bottom plate is curved; the two surfaces of the hopper bottom plate are an inner soil-contacting surface and an outer soil-contacting surface which have the same structure; the hopper bottom plate is sectioned along the sectioning surface parallel to the plane of the left side plate; the profile curve of the soil-contacting surface of the hopper bottom plate on the sectioning surface is the curve section which is obtained by the parametric equation that f(x) is equal to -0.0338*10<-3)x<3>+0.0124x<2>-1.5065x-4.5645 radical sign x, wherein the value range of x is 0 to 130. The parametric equation has the geometrical feature of variable curvature, the moving state when soil is contacted with the hopper bottom plate can be changed by the variable curvature geometrical structure, a smooth cutting effect to the moving soil can be achieved, and the working resistance of an excavator and the adhesion of the soil are reduced.

Description

technical field [0001] The invention relates to an excavator bucket, in particular to a variable curvature excavator bucket. Background technique [0002] Excavators are widely used in various fields including mines and urban construction. As an important working part of excavators, buckets are often used in various harsh working environments. By the end of 2013, the number of excavators in my country was not less than 1.5 million , The annual consumption of fuel oil is not less than 30 million tons. Reducing the working resistance of the excavator is of great significance for reducing fuel consumption. As the direct working part of the excavator, the bucket consumes no less than 40% of the power of the whole machine. The geometry of the bucket’s soil-contacting surface directly determines the desorption and drag-reducing performance of the bucket. A well-structured bucket’s soil-contacting surface can effectively reduce the working resistance of the excavator, thereby achi...

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Problems solved by technology

[0003] Although the above drag reduction methods can achieve the purpose of desorption and drag reduction, they generally have the disadvantages of complex mechanism design, high production cost and poor stability, and cannot fundamentally solve the problem of soil adhesion to the bucket.

In addition, the curved surface of the existing excavator bucket is mainly in the form of a circular arc surface. Since all points on the circular arc surface have the same curvature radius and point to the same center of the circle, the soil in contact with the soil-touching curved surface will be affected by the surface during the working process of this curved surface. The normal pressure also points to the center of the circle, which is seriously unfavorable for the loosening of the soil, resulting in serious adhesion of the soil during the working process and high working resistance

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