A cutting chain used for cutting coal by a coal mining machine

Abstract

The invention discloses a cutting chain for cutting coal of a coal shearer, which is composed of several cutting chain units, and the cutting chain unit includes a chain plate (1), a crawler shoe (2) and cutting teeth (3 ), the angle range between the upper surface and the lower surface of the track shoe (2) is 2° to 15°, and several cutting teeth (3) are longitudinally arranged and fixed on the upper surface of the track shoe (2), and the track shoe ( 2) The lower surface is connected with the chain plate (1). The inclined cutting chain increases the cracking effect of the front of the working face without surrounding rock pressure during the cutting process, and the cutting energy consumption ratio is lower than that of the traditional fixed cylindrical cutting drum; at the same time, the inclined cutting The cutting chain is conducive to the discharge of broken coal blocks, which makes the coal loading effect of the chain cutting part better.

Description

technical field [0001] The invention relates to a coal mining machine, in particular to a cutting chain used for coal cutting by the coal mining machine, and belongs to the technical field of coal mining equipment. Background technique [0002] The chain cutting part of the coal shearer is mainly composed of a traction part, a traveling part and a cutting part. The cutting part includes three parts: the fuselage support, the power part of the cutting chain and the cutting chain. The power part of the cutting chain is installed on the machine beam at the front end of the cutting part, and the cutting disc is equipped with a cutting chain, and the cutting chain rotates around the guide groove of the cutting disc under the action of the sprocket, driving the pick to break coal and penetrate into the coal wall And cut the coal, under the traction of the traction part, the cutting part is along the coal wall and the bottom groove with a depth of 0.8-1.2 meters. The cutting part ...

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Problems solved by technology

[0003] The existing cutting chain of coal shearer is composed of chain plate, pin shaft and cutting teeth. The chain plate is fixed with cutting teeth. Several chain plates are connected in series through the pin shaft to form a cutting chain. Driven to rotate to realize the cutting of the coal wall, when cutting, all the cutting teeth on the cutting chain form a cutting surface to complete the work of cutting and breaking coal, and the work efficiency is low; the cutting teeth on the cutting chain When the cutting teeth are in vertical contact with the coal body when breaking coal, the surrounding rock pressure of the cutting teeth close to the coal wall is relatively high during the cutting process, so the cutting resistance is relatively large; and due to the uneven force on the cutting teeth, the cutting During the cutting process, the cutting energy consumption of the cutting teeth is uneven, which accelerates the loss of the cutting teeth; the surface of the chain plate is flat, which makes it impossible to automatically drop coal and load coal, and an auxiliary coal loading device is required

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