CN201007211Y

CN201007211Y - Rotating pick for coal cutter

Info

Publication number: CN201007211Y
Application number: CNU200620022091XU
Authority: CN
Inventors: 刘玉山
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-22
Filing date: 2006-11-22
Publication date: 2008-01-16
Anticipated expiration: 2016-11-22

Abstract

The utility model relates to a coal cutting tool of the coal cutter, in particular to a coal cutter rotating cutter bit, comprising an alloy head, a tooth head and a tooth handle, wherein the circumference of the tooth head is homogeneously distributed with four ribs; the rib is an approximate isosceles triangle; and a combining portion of the tooth head and the tooth handle is provided with a tooth head rotary table. The coal cutter bit can conquer the shortage of the prior art, and the ribs on the tooth head is an isosceles triangle, thereby, the operating resistance is small, the cutter bit rotates by itself under the function of the horizontal component force of the coal body resistance, the alloy head and the tooth head are not impartially abraded, and the alloy head can be sharpened automatically.

Description

A kind of coal-winning machine rotary cutting bit

Affiliated technical field:

The utility model relates to a kind of coal-winning machine coal cutting instrument, especially a kind of coal-winning machine rotary cutting bit.

Background technology:

At present, the coal winning machine cutting bit that the coal mining scope of operation is used, be pick-like bit, the tooth head of this pick is cone-shaped, non-rotatable, only grind one side during operation, alloy head on the crown and tooth head easily form eccentric wear and decrease, and easily form very big shearing resistance behind the alloy head blunt, have reduced the operating efficiency of coal-winning machine, the alloy head is easily lost, thereby has increased the ton cost of mining.

Summary of the invention:

Non-rotatable in order to overcome the pick that existing coal winning machine cutting bit exists, only grind one side during operation, alloy head on the tooth top and tooth head easily form eccentric wear and decrease, easily form very big shearing resistance behind the alloy head blunt, reduced the operating efficiency of coal-winning machine, the alloy head is easily lost, thereby increased the deficiency of the ton cost of mining, the utility model provides a kind of coal-winning machine rotary cutting bit, this coal winning machine cutting bit not only can overcome the deficiencies in the prior art, and the fin on the tooth head is approximate isosceles triangle, and working resistance is little, makes pick self rotation under the effect of coal body resistance levels component.

The technical scheme that the utility model technical solution problem is taked is: be by the alloy head, the tooth head, the tooth handle constitutes, the tooth head is a taper, the tooth crown is the plane, the alloy head cooperates brazing to fix with plane, the tooth crown, the tooth head, the tooth handle is an one, four fins of tooth head circumference uniform distribution, fin is approximate isosceles triangle, there is tooth head round platform tooth head and tooth handle joint portion, and the fin rib height on the tooth head is 0.2 millimeter near the tooth top of the head, and the place is the 3.5-5 millimeter near tooth head round platform, fin is the 2-3 millimeter near tooth top of the head width, near tooth head round platform place width is the 18-20 millimeter, and the fin root is R0.5, and fin dual-side lead angle is R0.5.

The beneficial effects of the utility model are: this coal winning machine cutting bit not only can overcome the deficiencies in the prior art, and the fin on the tooth head is an isosceles triangle, working resistance is little, under the effect of coal body resistance levels component, make pick self rotation, alloy head and tooth head not eccentric wear decrease, the self-sharpening of alloy head, the alloy head is difficult for losing, and has reduced the ton cost of mining.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the utility model structural front view;

Fig. 2 is the structure vertical view of the utility model Fig. 1;

Fig. 3 is that the A-A of utility model Fig. 1 throws view.

The specific embodiment:

Embodiment of the present utility model is: be by alloy head 1, tooth head 6, tooth handle 5 constitutes, tooth head 6 is a taper, the tooth crown 2 is the plane, alloy head 1 cooperates brazing to fix with 2 planes, the tooth crown, tooth head 6, tooth handle 5 is an one, four fins that tooth head 6 circumference uniform distributions and fin 3 are identical, four fins are identical, with fin 3 is example, fin 3 is approximate isosceles triangle, tooth head 6 has tooth head round platform 4 with tooth handle 5 joint portions, and the fin 3 rib height on the tooth head 6 are 0.2 millimeter near 2 places, the tooth crown, and 4 places are the 3.5-5 millimeter near tooth head round platform, fin 3 is the 2-3 millimeter near the tooth crown 2 place's width, near tooth head round platform 4 place's width is the 18-20 millimeter, and fin 3 roots are R0.5, and fin dual-side lead angle is R0.5, when using, this pick is installed on the coal mining machine roller, when fin 3 touches coal body, under the effect of coal body resistance levels component, makes pick self rotation.

Claims

1. a coal-winning machine rotary cutting bit relates to a kind of coal-winning machine coal cutting instrument, especially a kind of coal-winning machine rotary cutting bit: be to constitute by alloy head, tooth head, tooth handle, it is characterized in that: four fins of tooth head circumference uniform distribution, fin is approximate isosceles triangle, there is tooth head round platform tooth head and tooth handle joint portion;

2. a kind of coal-winning machine rotary cutting bit according to claim 1 is characterized in that: the fin rib height on the tooth head is 0.2 millimeter near the tooth top of the head, and the place is the 3.5-5 millimeter near tooth head round platform;

3. a kind of coal-winning machine rotary cutting bit according to claim 1 is characterized in that: fin is the 2-3 millimeter near tooth top of the head width, is the 18-20 millimeter near tooth head round platform place width;

4. a kind of coal-winning machine rotary cutting bit according to claim 1 is characterized in that: the fin root is R0.5;

5. a kind of coal-winning machine rotary cutting bit according to claim 1 is characterized in that: fin dual-side lead angle is R0.5.