CN2596012Y

CN2596012Y - Coal cutting teeth of coal mining machine

Info

Publication number: CN2596012Y
Application number: CN 02295222
Authority: CN
Inventors: 唐义波
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2003-12-31
Anticipated expiration: 2012-12-24

Abstract

The utility model relates to a novel cutting tooth of a coal mining machine, which is composed of a tooth tip, a tooth body, and a tooth tail. The top of the tooth body is in the shape of a cone. The diameter of the cone bottom is larger than the diameter of the combined part of the tooth body and the cone bottom. An alloy head and the top of the tooth body are brazed and fixed to form the tooth tip. Four inclined ribs are uniformly arranged on the tooth body. The four inclined ribs and a center line form included angles of 10 DEG to form spiral leaves. The tooth tail is in the shape of a column, and the lower part of the tooth tail is provided with an annular groove. The annular groove is provided with a transition circular arc. The combined part of the tooth tail and the tooth body is provided with a transition circular arc. The defects that the existing pickaxe-shaped cutting tooth easily generates deflection abrasion, the alloy head is easily lost, and the combined part of the tooth body and the tooth tail is easily broken and curved are overcome. The novel cutting tooth of a coal mining machine can also realize autorotation to cause the tooth tip to be uniformly abraded and sharpened. The novel cutting tooth of a coal mining machine is a more ideal coal cutting tool of a coal mining machine.

Description

A kind of novel coal winning machine cutting bit

Affiliated technical field:

The utility model relates to a kind of coal-winning machine coal cutting instrument.

Background technology:

At present, what known coal winning machine cutting bit adopted is pick-like bit, crown easily produces eccentric wear and decreases, the alloy head is easily lost, tooth body and tooth tail joint portion frangibility, bending, the pick of damage need in time to change to guarantee ordinary production, add up according to investigations, ten thousand tons of consumption of coal amounts are about 200 picks, and this is the problem that presses for solution in the current Coal Production.

Summary of the invention:

Easily produce eccentric wear in order to overcome existing pick-like bit, the alloy head is easily lost, the deficiency of tooth body and tooth tail joint portion frangibility, bending, the utility model provides a kind of novel coal winning machine cutting bit, this pick not only can be finished coal mining activity efficiently, can also realize that rotation makes crown uniform wear, sharpening.

The technical scheme that its technical problem that solves the utility model adopts is: be to be made of crown, tooth body, tooth tail, tooth body top is taper, its cone bottom diameter is greater than tooth body and its joint portion diameter, crown is to be made of surely alloy head and the solid welding of tooth body top copper, tooth body and tooth tail mould once-forming, tooth is evenly equipped with 4 diagonal bars on one's body, diagonal bar becomes 10 degree angles with center line, constitute the spiral leaf, and the diagonal bar height is 4 millimeters, the muscle root is R4, the muscle top is R2.5, and the tooth tail is cylindric, and an annular groove is arranged at the bottom, annular groove has transition arc, and there is excessive circular arc tooth tail and tooth body joint portion.

The beneficial effects of the utility model are, because it is lobate in the shape of a spiral that tooth reinforcing rib design is on one's body become diagonal bar, under the effect of the horizontal component of coal body resistance, make pick keep self rotation, crown can obtain even sharpening and wearing and tearing in the course of the work, thereby prolong the application life of pick, reduce the consumption of pick.Improved the operating efficiency of coal-winning machine, crown has strengthened appearance and size, has protected the frayed degree of tooth body, and the tooth body becomes transition arc with tooth tail joint portion with trench design, increased intensity be difficult for to produce fracture, bending.

Description of drawings:

Fig. 1 is the utility model structure chart

Fig. 2 is the utility model a-a sectional drawing

1 crown, 2 tooth bodies, 3 diagonal bars, 4 tooth tails among Fig. 1

5,6,7 diagonal bars among Fig. 2

The specific embodiment:

The utility model specific embodiment is, be to constitute by crown 1, tooth body 2 and tooth tail 3, tooth top portion is that its awl end of taper is greater than tooth body 2 and its joint portion diameter, crown 1 is to be made of surely alloy head and the 2 top copper solid weldings of tooth body, tooth body 2 and tooth tail 4 mould once-formings, being evenly equipped with 4 diagonal bars, 3,5,6,7 diagonal bars on the tooth body 2 becomes 10 degree angles to constitute helical lobed with center line, the diagonal bar height is 4 millimeters, muscle root transition circle is R4, the top is R25, and tooth tail 4 is cylindric, and an annular groove is arranged at the bottom, annular groove has transition arc, and tooth tail 4 has transition arc with tooth body 2 joint portions.

Claims

1. a novel coal winning machine cutting bit is to be made of crown, tooth body, tooth tail, and it is characterized in that: tooth body top is taper, and its awl base diameter is greater than tooth body and its joint portion diameter, and tooth is evenly equipped with 4 diagonal bars on one's body, constitutes the spiral leaf.

2. a kind of novel coal winning machine cutting bit according to claim 1, its feature also is: diagonal bar becomes 10 degree angles with center line, the diagonal bar height is 4 millimeters, and the muscle root is R4, and the muscle top is R2.5.

3. a kind of novel coal winning machine cutting bit according to claim 1, its feature also is: an annular groove is arranged at tooth tail bottom, and annular groove has transition arc, and there is transition arc tooth tail and tooth body joint portion.