CN2294333Y - Cutting edge for coal prodn. machine - Google Patents

Abstract

The utility model relates to a cutting tool for coal extraction machines, which is composed of a pick, a pick sleeve, a pick base and elastic baffle rings, wherein, the pick is conical and is fixed on a pick sleeve hole by an elastic baffle ring, the pick base is buried and welded in blades and an end disc of a screw drum of the coal extraction machine, and the pick sleeve is fixed in a pick base hole by a shaft through an elastic baffle ring. The utility model has long service life, high block rate of coal, strong weld strength of the pick base, no damaged dropping and increased coal charging effect.

Description

A kind of coal-winning machine cut cutter

The utility model belongs to cutter, is specifically related to a kind of coal-winning machine cut cutter.

On existing coal-winning machine, the cut cutter is generally pick type cutter, and it is made up of pick, tooth cover and toothholder, and its tooth cover is fixed on the tail end of toothholder head by circlip, and pick is fixed in tooth overlaps by snap ring; Its toothholder head stretches out blade, and afterbody is welded in blade or the end plate, and not only weld seam is short for it, can cause the toothholder weld strength low, flimsy shortcoming, and, cause the Shearer Helical Drum effect of loading coal bad because cutter extension elongation Lp is long.

The purpose of this utility model task is in order to solve the problem of above-mentioned existence, and a kind of new coal-winning machine cut cutter is provided.

The utility model is design like this: it is made up of pick, tooth cover, toothholder and circlip, and its pick is conical, is fixed in the tooth trepanning by circlip; Toothholder buries in the blade and end plate that is welded on Shearer Helical Drum; The tooth cover is used to protect toothholder, is fixed in the toothholder hole by circlip for shaft.

The utility model has the advantages that: conical pick weares and teares when cut coal evenly, thereby has prolonged the application life of pick; Can reduce the pick quantity on the helix drum, improve the coal pieces rate, reduce dust; In addition because toothholder buries in the blade and end plate that is welded on helix drum, thereby the weld seam of the toothholder that extended has strengthened the weld strength of toothholder, guaranteed that toothholder is not fragile to come off; The length that extends radially out of pick reduces, and has improved the effect of loading coal of Shearer Helical Drum;

Describe structure of the present utility model in detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is a generalized section of the present utility model.

Accompanying drawing 2 is that the A of Fig. 1 is to schematic diagram.

Wherein, 1, pick 2, tooth cover 3, toothholder 4, circlip 5, Shearer Helical Drum blade or end plate

Pick 1 is conical, is fixed in the tooth trepanning by circlip; Toothholder buries in the blade and end plate that is welded on Shearer Helical Drum; The tooth cover is used to protect toothholder, is fixed in the toothholder hole by circlip for shaft.

Claims (1)

1. A kind of coal-winning machine cut cutter is made up of pick, tooth cover, toothholder and circlip, and its pick that is characterised in that of the present utility model is fixed in the tooth trepanning by circlip for conical; Toothholder buries in the blade and end plate that is welded on Shearer Helical Drum; The tooth cover is fixed in the toothholder hole by circlip for shaft.

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