Retractable dust-proof pick assembly

Abstract

The invention relates to a retractable dustproof cutting tooth assembly and belongs to the field of coal ploughing machinery. The cutting tooth assembly is composed of a cutting tooth plate (1), cutting tooth grooves (2), a cutting tooth (3), a push rod (4), a rolling wheel (5), a sealing plate (6), a limiting pin (7), a push rod compressed spring (8), a tooth groove tension spring (9) and a plurality of screws, wherein a round hole which penetrates through up and down is formed in the center of the top surface at the left part of the cutting tooth plate; a cross-shape-like slide groove which penetrates through left and right is formed in the center of the left surface of the cutting tooth plate; a thread hole and a tension spring hole are drilled at the centers of two cylindrical end faces of each cutting tooth groove respectively; the two cutting tooth grooves with the mutually-opposite tension spring holes are mounted at a round hole of a cutting part; an inclined plane which forms an included angle of 45 degrees with the axis is milled on the right lower part of each cutting tooth groove, the left end of the push rod has an arrow-head-shaped structure and has an inclined plane dip angle of 45 degrees; the assembly can be used for realizing a function of changing the mining height of the cutting tooth along with the change of the thickness of a coal seam, and by mutual matching of the assemblies, the push rod compressed spring, the tooth groove tension spring and the like are separated from the external environment, so that the cutting tooth assembly is not influenced by dust and coal dust.

Description

technical field [0001] The invention belongs to the field of coal plowing machinery, in particular to a retractable dust-proof pick assembly for a coal plow. Background technique [0002] The pick assembly is mainly used as the cutting mechanism of the underground coal plow, and through the overall movement of the pick assembly, coal mining can be realized. Coal plow has many advantages such as low energy consumption, simple structure, and is suitable for thin coal seam mining. It has become a coal mining machine that is second only to drum shearer and used more. However, the plowing height of the existing coal plow cannot be adjusted with the change of the thickness of the coal seam. When encountering a coal seam with a thicker roof, more coal will be left. It is difficult; when encountering a coal seam with a thicker floor, it is necessary to "gnaw low" or "float the knife". Contents of the invention [0003] The purpose of the present invention is to provide a retract...

AI Technical Summary

Problems solved by technology

However, the plowing height of the existing coal plow cannot be adjusted with the change of the thickness of the coal seam. When encountering a coal seam with a thicker roof, more coal will be left. It is difficult; when encountering a thicker coal seam, it is necessary to "bite down" or "float the knife"

Images