CN201857966U

CN201857966U - Cutter

Info

Publication number: CN201857966U
Application number: CN2010205711365U
Authority: CN
Inventors: 吕增和
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-06-08
Anticipated expiration: 2020-10-15

Abstract

The utility model discloses a cutter which comprises a tooth tip and a cutter body, wherein the tooth tip is embedded at the front end of the cutter body, a raised part is arranged at the front end of the axle center of the cutter body, and an assembly hole is arranged at the back end of the axle center; and the tooth tip is provided with an inner cavity matched with the raised part of the cutter body. The cutter can save materials and is convenient to process and low in tooth abrasion; the tooth tip and the part in abrasion of the cutter body are designed into a crown-shaped whole, and the cutter body is embedded at the lower part in the crown-shaped hard alloy tooth tip, thereby avoiding the abrasion of the steel-based cutter body, improving the abrasion resistance of the cutter body and effectively protecting brazing from being abraded; and the cutter can be interchanged with a tooth holder of an existing pick-shaped cutter, thereby being conductive to updating and regeneration of the product and being popularized as soon as possible.

Description

Pick

Technical field

The utility model relates to mining machinery field, colliery, relates in particular to a kind ofly in the mining machinery course of work of colliery, is installed on the mining machinery cutting mechanism of colliery, is used for the pick of cut coal petrography.

Background technology

The pick that the cutting tool of coal-winning machine, development machine uses mainly is made up of pick body and crown, and a class is a pick-shaped cutter, and another kind of is knife shape cutter teeth.

Pick-shaped cutter directly is contained in the toothholder hole at first, and its toothholder wearing and tearing and pick rotating property difference are outstanding problems, have occurred a kind of pick-shaped cutter with the tooth boots afterwards, middle porose tooth boots are plugged in toothholder, fix with shaft-use elastic gear ring, the pick-shaped cutter front end is a crown, and its pick body has the tooth handle, be fixed in the interstitial hole of tooth boots with expansion set, because the tooth boots have big outer eaves, have effectively alleviated the toothholder wearing and tearing, and have strengthened frictional rotation moment, thereby drive the pick-shaped cutter rotation, make the self-sharpening of crown energy, not only cutting resistance is little, and the tooth consumption is descended greatly, but rotating property is still very poor, if it is untimely that the tooth boots are changed, still can not avoid the toothholder wearing and tearing, and pick and tooth handle are one, must set level forging, make troubles to processing, because be expendable part, must together change in addition together with the tooth handle, consumptive material is big, and cost is higher.Pick-like bit is to be adopted soldering and made by pick body and crown two parts, and crown is embedded in the pick body front end shrinkage pool.The pick body is general adopt in the carbon high strength alloy steel process through modifier treatment, matrix mostly is tempered martensite or secondary troostite, hardness about 40HRC, impact toughness more than 50J/cm2, material manufacturings such as domestic normal employing 42CrMo, 35CrMo.Crown is by the high temperature resistant tungsten carbide of higher hardness and the iron group metal cobalt with higher-strength and toughness, carry out proportioning according to pick cutting coal petrography character,, sintering repressed in specialized factory forms, the carbide alloy code name of domestic normal employing is YG11C, YG8C etc., and the hole of toothing point is generally than the big 0.1～0.3mm of crown on the pick body.Copper base or money base scolder are adopted in soldering, and copper parent metal brazing temperature is 880～950 ℃, and money base is 600～700 ℃, but the money base scolder is more expensive, the domestic copper parent metals that adopt more, and its trade mark is 105 manganese strong solders.Soldering generally adopts dewatering borax to carry out in atmosphere, and easy oxidation during owing to soldering easily makes weld seam generation pore and reduces soldering strength.Existing domestic existing employing Vacuum Soldering Technology has improved the intensity and the quality of soldering greatly.

The knife shape cutter teeth front end is a crown in addition, and the pick body is fixed in toothholder by pin, and this pick rotating property is poor, and crown easily produces thermal wear and heat fatigue effect, and the tooth consumption increases.

Summary of the invention

The utility model purpose provides a kind of material, easy to process, pick that the tooth consumption is low saved.

The technical solution of the utility model is:

Pick comprises crown and pick body, and described crown is embedded in pick body front end, and described pick axon heart front end is provided with bossing, and the rear end, axle center is provided with pilot hole; Described crown is provided with the inner chamber that is complementary with pick body bossing.

Described pick body is by jackshaft and toothholder assembling, and jackshaft one end matches with the pilot hole of pick body, and with two elastic spring lockings, the other end is plugged in toothholder, fixes with resilience gear ring with axle.

Also be provided with wear washer between described pick body and the toothholder.

Also be provided with sealing ring between described pick body and the jackshaft.

The interior cavity wall of described crown is shape of threads, described pick body bossing is the frustum face, and the screw thread that matches with the inner chamber internal thread is arranged on its face, and the crown spinning is on pick body bossing frustum face, by full inner chamber of the scolder of fusing and thread pitch, its condensation is solidified as a whole.

The beneficial effects of the utility model are as follows:

1, saves material.General pick-shaped cutter tooth handle is equivalent to 1/2 of pick gross weight heavily approximately, and the utility model crown type does not have the tooth handle of pick-shaped cutter, but offer pilot hole in the pick-shaped cutter axle center, its shape is as hat, the type pick so win, the anodontia handle of pick, offer endoporus, assembling the time does not need the tooth boots to be directly installed on the toothholder, obviously can save material in a large number, itself has big limb with the old replacing of pick, can more effectively prevent the toothholder wearing and tearing, it can exchange with existing pick-shaped cutter toothholder and install, and obviously helps model change, extensively promotes the use of as early as possible.

2, easy to process.The utility model is realized process modification easily because it does not have the tooth handle, realizes easily upright the forging, forges like this that dressing is few, precision is high, and appearance turning amount reduces, and endoporus can realize that again the relative turning amount of Drilling Operations reduces, and promptly saves material and can boost productivity again.

3, prevent that toothholder from wearing and tearing, the tooth consumption is low.The utility model is owing to can adopt the upright convenient limb that strengthens of forging on the technology, change in time with pick, can more effectively prevent the toothholder wearing and tearing, and limb can strengthen frictional rotation moment equally, and because the crown type pick directly pivots, rotates more flexibly, crown weares and teares more even, therefore can alleviate the thermal wear and the heat fatigue effect of crown carbide alloy to a great extent, will make the crown type pick that lower tooth consumption be arranged.

4, the utility model is installed jackshaft on toothholder, and the jackshaft lower end normally is fixed in the common toothholder hole, and the jackshaft upper end is installed the crown type pick and locked with elastic spring, and the crown type pick is a normal consumption spare like this, and jackshaft does not then need frequent replacing.

5, changed traditional pick and taked to strengthen the mode of thinking of its hardness for improving crown pick body abrasion resistance on every side; overturned the immanent structure form of its original pick; crown and the pick body that is worn part are designed to crown one; real pick body then is set in the interior bottom of crown carbide alloy crown; the wearing and tearing of base steel pick body have been avoided; improve the abrasion resistance of pick body, protected soldering not frayed effectively.

Description of drawings

Fig. 1 is the sectional view of the utility model embodiment;

Fig. 2 is the assembly structure schematic diagram of the utility model embodiment

Sequence number among the figure: 1, crown, 2, the pick body, 3, bossing, 4, pilot hole, 5, inner chamber, 6, jackshaft, 7, toothholder, 8, two elastic spring, 9, resilience gear ring, 10, wear washer, 11, sealing ring.

The specific embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail, but is not constituted any restriction of the present utility model:

Shown in accompanying drawing 1, a kind of pick comprises crown 1 and pick body 2, and described pick body 2 hub head ends are provided with bossing 3, and the rear end, axle center is provided with pilot hole 4; Described crown 1 is provided with the inner chamber 5 that is complementary with pick body 2 bossings 3, inner chamber 5 inwalls of described crown 1 are shape of threads, described pick body 2 bossings 3 are the frustum face, the screw thread that matches with inner chamber 5 internal threads is arranged on its face, crown 1 spinning is on pick body 2 bossings 3 frustum faces, by full inner chamber 5 of the scolder of fusing and thread pitch, its condensation is solidified as a whole; Described pick body 2 is by jackshaft 6 and toothholder 7 assemblings, jackshaft 6 one ends match with the pilot hole 4 of pick body 2, with two elastic spring 8 lockings, the other end is plugged in toothholder 7, fixing with axle with resilience gear ring 9, also be provided with wear washer 10 between described pick body 2 and the toothholder 7, also be provided with sealing ring 11 between described pick body 2 and the jackshaft 6.

The utility model is installed on the toothholder 7 of coal mining machine roller, be used for directly cutting coal, for preventing that jackshaft 6 from fractureing in weakness band accident, assembling the wear washer 10 that neck adds suitable thickness and hardness with pick again, even the thin axle fracture in top, wear washer 10 still can be locked in and prevent toothholder 7 wearing and tearing on the thick axle in bottom, as seen the reliability that this crown type pick uses also is more complete, particularly it has also considered the supporting installation of jackshaft and existing toothholder in design, and will help existing toothholder to select novel pick for use and promote the use of sooner.

Embodiment is just for the ease of understanding the technical solution of the utility model; do not constitute restriction to the utility model protection domain; every interior any simple modification, equivalent variations and modification of perhaps according to technical spirit of the present utility model above scheme being done that does not break away from technical solutions of the utility model all still belongs within the utility model protection domain.

Claims

1. pick comprises crown (1) and pick body (2), and described crown (1) is embedded in pick body (2) front end, it is characterized in that: described pick body (2) hub head end is provided with bossing (3), and the rear end, axle center is provided with pilot hole (4); Described crown (1) is provided with the inner chamber (5) that is complementary with pick body (2) bossing (3).

2. according to the described pick of claim 1, it is characterized in that: described pick body (2) is by jackshaft (6) and toothholder (7) assembling, jackshaft (6) one ends match with the pilot hole (4) of pick body (2), lock with two elastic springs (8), the other end is plugged in toothholder (7), and is fixing with resilience gear ring (9) with axle.

3. pick according to claim 2 is characterized in that: also be provided with wear washer (10) between described pick body (2) and the toothholder (7).

4. according to claim 2 or 3 described picks, it is characterized in that: also be provided with sealing ring (11) between described pick body (2) and the jackshaft (6).

5. according to claim 1,2 or 3 described picks, it is characterized in that: inner chamber (5) inwall of described crown (1) is shape of threads, described pick body (2) bossing (3) is the frustum face, the screw thread that matches with inner chamber (5) internal thread is arranged on its face, crown (1) spinning is on pick body (2) bossing (3) frustum face, by full inner chamber (5) of the scolder of fusing and thread pitch, its condensation is solidified as a whole.

6. pick according to claim 4, it is characterized in that: inner chamber (5) inwall of described crown (1) is shape of threads, described pick body (2) bossing (3) is the frustum face, the screw thread that matches with inner chamber (5) internal thread is arranged on its face, crown (1) spinning is on pick body (2) bossing (3) frustum of a cone, by full inner chamber (5) of the scolder of fusing and thread pitch, its condensation is solidified as a whole.