Motor Torque Shaft Protection Mechanism of Cutting Part of Coal Shearer

Abstract

The invention relates to a component of coal cutter cut part motors, in particular to a protection mechanism for a coal cutter cut part motor torque shaft. The protection mechanism is composed of a motor, the torque shaft, a bearing, a bearing end cover, an elastic protection disc, a spacer bush, a locking nut and a limiting snap spring, and solves the problem that the torque shaft is fractured due to overload and replaced frequently. The motor and the torque shaft are still connected through a spline, the torque shaft and a cut part gear shaft are connected through an end-toothed disc, and the torque load can be converted into the axial load. An original shearing groove structure is omitted in the torque shaft, the elastic protection disc is additionally arranged at the shaft end, the disc is provided with a circular groove, and when the axial load is excessively large, the torque shaft is punched broken and fractured in the circular groove, and only the disc needs to be replaced after fracturing. The locking nut and the limiting snap spring are adopted on the outer side of the elastic protection disc, the torque shaft can integrally move outwards when the limiting snap spring and the locking nut are released, and the shaft is separated from a cut part. The torque converting structure is simple and reasonable and reliable in design, and has the advantages of being easy to replace and low in cost.

Description

technical field [0001] The invention relates to a component part of a motor torque shaft of a coal mining cutting part, in particular to a torque shaft protection mechanism, which belongs to the field of coal mine equipment. Background technique [0002] At present, the motor torque shaft of the cutting part of the coal shearer is usually designed in the form of splines at both ends and an unloading groove at one end. When the cutting part is overloaded, the torque shaft breaks at the unloading groove, and then a new torque shaft is replaced. This method brings two problems. One is that it is not easy to replace, and the replacement workload is large when it breaks. The broken shaft body is not easy to take out, and the spline at the gear end is not easy to align when reinstalling. The other is high cost, and the torque shaft is scrapped on the spot after breaking , needs to be replaced again, and the single cost is between several thousand to tens of thousands of yuan, whic...

AI Technical Summary

Problems solved by technology

This method brings two problems. One is that it is not easy to replace, and the replacement workload is large when it breaks. The broken shaft body is not easy to take out, and the spline at the gear end is not easy to align when reinstalling. The other is high cost, and the torque shaft is scrapped on the spot after breaking , needs to be replaced again, and the single cost is between several thousand to tens of thousands of yuan, which reduces the working efficiency of the shearer and increases the operating cost of the shearer

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