Cantilever type heading machine for coal mining

Abstract

The invention relates to the technical field of coal mining equipment, and discloses a cantilever type heading machine for coal mining. The cantilever type heading machine includes a connecting seat,a cutting seat is arranged at the top of the connecting seat, and the inner wall of the cutting seat is connected with an elastic part. The inner wall of a feed control groove is inclined, when cutting teeth are subjected to huge axial force in the left direction, a movable part provides radial force for a feed clamping ring for radial deformation, the inner space of the feed clamping ring is enlarged and separated from the feed control groove, the movable part can move to the left inside the feed clamping ring, then the cutting teeth automatically slide into the cutting seat, the feed amountof the cutting teeth is reduced, and the purpose of changing the feed amount of the cutting teeth is realized according to the hardness of a roadway inner wall rock layer and a coal seam; and the feedamount of the cutting teeth can be changed, the cutting teeth can conduct cutting and breaking according to layers with different hardness, the wear rate of the cutting teeth is low, frequent shutdown is not required to replace the cutting teeth, and the working efficiency of the heading machine is improved.

Description

technical field [0001] The invention relates to the technical field of coal mining equipment, in particular to a cantilever roadheader for coal mining. Background technique [0002] The cantilever type roadheader is an engineering machine for digging roadways in coal mining. It is mainly composed of cutting mechanism, loading mechanism, transportation mechanism, walking mechanism, frame and rotary table, hydraulic system, electrical system, cooling dust removal water supply system and operation control system, etc. The cutting mechanism is composed of a transmission shaft, a cutting head, etc. The cutting head includes a cutting head body, a cutting seat and cutting teeth. The surface of the cutting head body is installed with a cutting seat in a welded or bolted form. Cutting teeth are installed on the cutting block through a fixed snap ring, such as Figure 5 As shown, but this installation method between the cutting seat and the cutting teeth still has the following probl...

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Problems solved by technology

[0003] 1. The cutting tooth and the cutting seat are connected by a fixed snap ring, and the cutting tooth is fixed, so that the cutting amount of the cutting tooth cannot be appropriately changed according to the hardness of the inner wall of the roadway. Hard rock formations are cut and broken, and the cutting teeth wear out quickly, requiring frequent shutdowns to replace the cutting teeth, which reduces the working efficiency of the roadheader

[0004] 2. When the hardness of the cutting teeth encounters the rock formation is too large and exceeds the rated cutting hardness of the cutting teeth, the cutting teeth will be subjected to huge cutting resistance, so that the cutting head cannot rotate normally. At this time, the cutting teeth are very easy to Distorted and deformed, it is necessary to stop the machine to replace the deformed cutting teeth, which reduces the working efficiency of the roadheader

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