CN102454404A

CN102454404A - Pick

Info

Publication number: CN102454404A
Application number: CN201010515196XA
Authority: CN
Inventors: 吕增和
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2012-05-16

Abstract

The invention discloses a pick. The pick comprises a pick tip and a pick body. The pick tip is embedded in a front end of the pick body. A front end of a shaft of the pick body is provided with a convex part. A rear end of the shaft of the pick body is provided with an assembling hole. The pick tip is provided with an inner cavity matching with the convex part of the pick body. The pick saves materials, is convenient for processing and realizes low pick consumption. The pick tip and a worn part of the pick body form an integrated coronal body and an unworn part of the pick body is embedded in an inner lower part of the pick tip which is a coronal hard alloy pick tip, and thus steel-based pick body wearing is avoided; pick body wear resistance is improved; soldering wearing is avoided effectively. The pick can be installed on the existing conical pick base, is conducive to product update and can be fast popularized and used.

Description

Pick

Technical field

The present invention relates to mining machinery field, colliery, relate in particular to a kind ofly in the mining machinery course of work of colliery, be installed on the mining machinery cutting mechanism of colliery, be 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 one type is 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, and 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, is fixed in the interstitial hole of tooth boots with expansion set, because the tooth boots have big outer eaves; Effectively alleviated the toothholder wearing and tearing, and strengthened frictional rotation moment, thereby driven the pick-shaped cutter rotation, made the self-sharpening of crown ability; Not only cutting resistance is little, the tooth consumption is descended greatly, but rotating property is still very poor, and is untimely if the tooth boots are changed; Still can not avoid toothholder wearing and tearing, and pick and tooth handle be one, must set level forging, make troubles to processing; Because be expendable part, must together change together with the tooth handle in addition, consumptive material is big, and cost is higher.Pick-like bit is to be adopted soldering and processed 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, mostly matrix is tempered martensite or secondary troostite, hardness about 40HRC, impact toughness more than 50J/cm2, made 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; Form through compacting, sintering in specialized factory; 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 in atmosphere, to carry out, and is prone to oxidation during owing to soldering, is prone to make 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 through pin, and this pick rotating property is poor, and crown is prone to produce thermal wear and heat fatigue effect, and the tooth consumption increases.

Summary of the invention

The object of the invention provides a kind of material, easy to process, pick that the tooth consumption is low saved.

Technical scheme of the present invention 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 through 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.

Beneficial effect of the present invention is following:

1, saves material.General pick-shaped cutter tooth handle is equivalent to 1/2 of pick gross weight heavily approximately, and crown type of the present invention does not have the tooth handle of pick-shaped cutter, but offers pilot hole in the pick-shaped cutter axle center; Its shape is like hat, so the type pick that wins, is offered endoporus, do not needed the tooth boots to be directly installed on the toothholder when assembling the anodontia handle of pick; Obviously can save material in a large number; Itself has big limb to use old replacing with pick, can more effectively prevent the toothholder wearing and tearing, and it can exchange with existing pick-shaped cutter toothholder and install; Obviously help model change, extensively promote the use of as early as possible.

2, easy to process.The present invention realizes 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 present invention changes in time with pick owing to can adopt the upright convenient limb that strengthens of forging on the technology, 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, with making the crown type pick that lower tooth consumption arranged.

4, the present invention installs 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, and real pick body then is set in the interior bottom of crown carbide alloy crown, has avoided the wearing and tearing of base steel pick body; Improve the abrasion resistance of pick body, protected soldering not frayed effectively.

Description of drawings

Fig. 1 is the sectional view of the embodiment of the invention;

Fig. 2 is the assembly structure sketch map of the embodiment of the invention

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 accompanying drawing and embodiment, the present invention is made further detailed description, but does not constitute any restriction of the present invention:

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, and the screw thread that matches with inner chamber 5 internal threads is arranged on its face, and 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 through 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, and is fixing with resilience gear ring 9 with axle; 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 present invention 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, again assembling the wear washer 10 that neck adds suitable thickness and hardness, even the thin axle fracture in top with pick; Wear washer 10 still can be locked in and prevent toothholder 7 wearing and tearing on the thick axle in bottom; It is thus clear that 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, selects novel pick for use and promotes the use of sooner and will help to have now toothholder.

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

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 said pick of claim 1; It is characterized in that: described pick body (2) is through jackshaft (6) and toothholder (7) assembling; Jackshaft (6) one ends match with the pilot hole (4) of pick body (2); With two elastic springs (8) locking, 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, and the screw thread that matches with inner chamber (5) internal thread is arranged on its face, and 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, and the screw thread that matches with inner chamber (5) internal thread is arranged on its face, and 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.