CN201763340U

CN201763340U - Coal mining machine cutting tooth

Info

Publication number: CN201763340U
Application number: CN201020262846XU
Authority: CN
Inventors: 宋泽锋; 樊润君; 朱庆霞; 姜海鹏; 石小勇; 丁传昱; 李长安
Original assignee: XI'AN COAL MINING MACHINERY SPECIAL EQUIPMENT CO Ltd
Current assignee: XI'AN COAL MINING MACHINERY SPECIAL EQUIPMENT CO Ltd
Priority date: 2010-07-19
Filing date: 2010-07-19
Publication date: 2011-03-16
Anticipated expiration: 2020-07-19

Abstract

The utility model relates to a coal mining machine cutting tooth. The traditional pickax type cutting tooth base surface is smooth conical surface, and is spread along the conical surface when being subjected to the acting force of a coal body during cutting so that the peripheral force driving the cutting tooth to rotate in the axial direction is little. In the practical mining process, when the acting force of the coal body is larger, the cutting tooth is difficult to realize self-rotation. The coal mining machine cutting tooth comprises a tooth head and a tooth handle. A tooth sleeve and a tooth seat are sequentially arranged at the outside of the tooth handle, the tooth head comprises an alloy head, a reducing part, a horn-shaped part and an equal diameter part, wherein a plurality of spiral reinforcements are uniformly distributed at the periphery of the horn-shaped part. In the utility model, the spiral reinforcements are added on the surface of the horn-shaped part, thus the cutting tooth base surface obtains the peripheral force from the reacting force of the coal wall to the cutting tooth to realize self-rotation so as to be uniformly abraded, and therefore, the service life is prolonged, the problem that the cutting tooth is difficult to realize self-rotation when the acting force of the coal body is larger is simultaneously and effectively avoided, and the production efficiency is improved.

Description

A kind of coal winning machine cutting bit

Technical field

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

Background technology

Continuous increase along with coal-winning machine power, requirement to coal winning machine cutting bit is also more and more higher, at present pick-shaped cutters that adopt more, in order to keep the pick uniform wear, pick requirement in the course of the work can be crossed the realization rotation, therefore pick-shaped cutter adopts pick and tooth cover, can both doing in relative rotation between tooth cover and the toothholder, the matched in clearance structure realizes rotating, but because the pick-shaped cutter basal plane mostly is the smooth conical surface, the active force that is subjected to coal body when cut spreads along the conical surface, make that the peripheral force that axially orders about the pick rotation is very little, in actual recovery process, when the coal body active force was big, pick was difficult to realize rotation.

Summary of the invention

The purpose of this utility model provides a kind of coal winning machine cutting bit of realizing rotation, this pick can be in the course of the work from rib to obtaining a peripheral force its reaction force, thereby reach rotation, and do not influence normal use.

For achieving the above object, the technical solution adopted in the utility model is: a kind of coal winning machine cutting bit, comprise tooth head and tooth handle, and the outside of described tooth handle is disposed with tooth cover and toothholder; Described tooth head comprises alloy head, reducing portion, tubaeform and isometrical portion, it is characterized in that: uniform several spiral bars that is provided with on the periphery of described tubaeform portion.

Above-mentioned every spiral bar cross-over connection is between reducing portion and isometrical portion.

The lead angle of above-mentioned spiral bar is 65 °～75 °.

The utility model compared with prior art, tubaeform surface of pick increased spiral bar, can make the pick matrix surface from rib to obtain the reaction force of pick a peripheral force realize from then obtain uniform wear, not only increase the service life, when effectively avoiding simultaneously the coal body active force big, pick is difficult to realize the problem of rotation, enhances productivity.

Description of drawings

Fig. 1, Fig. 2 are pick structural representations of the present utility model, and wherein Fig. 2 is that the tooth head part A of Fig. 1 is to view.

Fig. 3 the utility model pick force analysis schematic diagram.

Among the figure, 1-tooth head, 2-tooth handle, 3-tooth cover, 4-toothholder, 5-alloy head, 6-reducing portion, the tubaeform portion of 7-, the isometrical portion of 8-, 9-spiral bar.

The specific embodiment

Below in conjunction with accompanying drawing the utility model being carried out that specifies.

Referring to Fig. 1, Fig. 2, a kind of coal winning machine cutting bit of realizing rotation, comprise tooth head 1 and tooth handle 2, the outside of described tooth handle 2 is disposed with tooth cover 3 and toothholder 4 from inside to outside, and described tooth head 1 comprises and alloy head 5, reducing portion 6, tubaeform 7 and isometrical 8 is evenly equipped with several spiral bars 9 on described tubaeform 7 periphery, every spiral bar 9 cross-over connection are between reducing portion 6 and isometrical 8, when the lead angle of spiral bar 9 was 65 °～75 °, less to the influence of coal mining rate, pick rotated the most flexible.

Referring to Fig. 3, coal body is F to the pick total force in the cut process, power along the cross section diffusion is F1, and act on spiral bar 9 active forces for being the tangential force F2 of pick total force F, tangential force F2 effect can make pick do rotation automatically, reaches the purpose of uniform wear, compares with the former structure of spiral bar that has or not, increased the working strength of pick face simultaneously, specific energy consumption has also been had certain reduction.

The utility model is in conjunction with the manufacturing process of present colliery mode of occupation and pick, the utility model adopts the Forging Technology mode to realize, the disposable shaping processing of spiral bar and pick, be convenient to produce, not only make pick keep rotation in the course of the work, can guarantee the continuity of pick matrix microstructure fiber again, increase abrasive resistance.

Claims

1. a coal winning machine cutting bit comprises tooth head (1) and tooth handle (2), and the outside of described tooth handle (2) is disposed with tooth cover (3) and toothholder (4); Described tooth head (1) comprises alloy head (5), reducing portion (6), tubaeform (7) and isometrical (8), it is characterized in that: uniform several spiral bars (9) that are provided with on the periphery of described tubaeform (7).

2. a kind of coal winning machine cutting bit according to claim 1 is characterized in that: described every spiral bar (9) cross-over connection is between reducing portion (6) and isometrical (8).

3. a kind of coal winning machine cutting bit according to claim 1 is characterized in that: the lead angle of described spiral bar (9) is 65 °～75 °.