Telescopic anti-stripping cutting tooth

Abstract

The invention discloses a telescopic anti-stripping cutting tooth, which comprises a cutting tooth head part and a cutting tooth shaft part, wherein the cutting tooth is assembled into a cutting toothbase through a cutting tooth sleeve; the cutting tooth shaft part is inserted into the cutting tooth sleeve; a first spring is arranged between a cutting tooth head part and the cutting tooth sleeve;the lower end part of the cutting tooth shaft part extends out of the lower end of the cutting tooth base and is provided with an anti-stripping structure; the anti-stripping structure comprises a step through hole, a clamp pin, a round head screw and a second spring; the step through hole is transversely formed in the lower end part of the cutting tooth shaft part. The telescopic anti-strippingcutting tooth has the advantage that the impact damage problem caused by unexpected hard rock on the cutting tooth can be solved.

Description

technical field [0001] The invention relates to the technical field of mining machinery auxiliary components, in particular to a retractable anti-off pick. Background technique [0002] At present, there is usually a purely rigid connection between the pick and the pick seat on the shearer drum. Its function is to realize the cutting of coal and rock with the rotation of the cutting drum. Since the crushing of coal and rock is mostly impact load, the The overall vibration and shock of the coal machine has a great influence, and the texture and structure of the coal seam are relatively complex. The picks will inevitably encounter unexpected hard rock conditions during the cutting process, which makes the picks often break abnormally, resulting in the stress state of the entire drum. become bad, affect the working performance of the whole machine, and reduce the service life. [0003] To sum up, how to improve the problem of impact damage caused by unexpected hard rock to the...

AI Technical Summary

Problems solved by technology

[0002] At present, there is usually a purely rigid connection between the pick and the pick seat on the shearer drum. Its function is to realize the cutting of coal and rock with the rotation of the cutting drum. Since the crushing of coal and rock is mostly impact load, the The overall vibration and shock of the coal machine has a great influence, and the texture and structure of the coal seam are relatively complex. The picks will inevitably encounter unexpected hard rock conditions during the cutting process, which makes the picks often break abnormally, resulting in the stress state of the entire drum. become bad, affect the working performance of the whole machine, and reduce the service life

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