CN211777409U - Coal mining machine drill bit - Google Patents
Coal mining machine drill bit Download PDFInfo
- Publication number
- CN211777409U CN211777409U CN202020354494.4U CN202020354494U CN211777409U CN 211777409 U CN211777409 U CN 211777409U CN 202020354494 U CN202020354494 U CN 202020354494U CN 211777409 U CN211777409 U CN 211777409U
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- blade
- cutter head
- coal
- hole
- shearer
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- 239000003245 coal Substances 0.000 title claims abstract description 88
- 238000005065 mining Methods 0.000 title claims abstract description 43
- 238000005520 cutting process Methods 0.000 claims description 14
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 4
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 4
- 241001330002 Bambuseae Species 0.000 abstract description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 4
- 239000011425 bamboo Substances 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- 230000001815 facial effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a coal-winning machine drill bit comprises drilling rod and the blade of setting on the drilling rod, and the blade distributes on the blade disc, and the through-hole is opened at the blade disc center. The drill rod is a hollow drill rod with a through hole, and two ends of the through hole of the drill rod are respectively connected to the central through hole of the cutter head and the upper end of the coal mining conveyor. The utility model discloses from the blade disc of front end, to the hollow shaft in the middle of, the rocking arm in back is again, all is the through-hole that link up to with arrange the material union coupling, coal is scraped and is got after the breakage, directly falls into the inboard of blade, because the radial distribution of blade is on the blade disc, and rotatory, in coal was drawn into the row of centre section of thick bamboo, row expects that a section of thick bamboo inner wall spiral distribution stripper further with coal to the propelling movement of rear, then directly falls into on the coal mining scraper conveyor. Consequently the utility model discloses the coal of exploitation will directly fall into scraper conveyor on, saved a large amount of time to scraper conveyor facial make-up coal, improved coal mining efficiency.
Description
Technical Field
The utility model relates to a coal mining mechanical device, especially a drill bit of coal-winning machine.
Background
Coal resources are important resources in our country, and because the amount of coal used is very large in the high-speed period of construction and development, a large amount of coal needs to be mined.
Because coal mining is mainly underground mining, therefore the exploitation work load is very big, in recent years, in order to improve the exploitation efficiency of coal, the mechanized mining is adopted to the mine of most coal mining, and the mining equipment that mechanized mining mainly used is: the supporting frame, the coal mining machine and the scraper conveyor are called as three-machine matched mining, and the arrangement mode of the supporting frame on the working face is as follows: the support frame supports on the roof of the upper end of the coal face, the link plate conveyor is arranged below the support frame, the scraper conveyor penetrates through the starting end of the coal face, the scraper conveyor is groove-shaped, a rail is arranged above the scraper conveyor, the coal mining machine rides and buckles the link plate conveyor through the rail, then the coal mining machine walks back and forth on the link plate conveyor, a roller on the coal mining machine cuts a coal wall, coal is cut in front of the link plate conveyor (the outer side of the scraper conveyor), and then the coal is loaded on the link plate conveyor through manual coal prying or mechanical coal prying and is transported outside.
Coal is after the purchase machine cutting, pile up the place ahead at scraper conveyor, with the coal dress on scraper conveyor, must experience the process of a coal charge, a large amount of coals are piled up in the place ahead of link plate conveyor, certain time and cost can be spent in the coal charge work, consequently if can be with after the coal exploitation, directly fall on the link plate conveyor, or at least most fall on the link plate conveyor, will save a large amount of coal charge time, and then save coal mining time, save the exploitation cost, improve the exploitation efficiency.
Therefore, how to solve the coal charging work is very important for coal mining work.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a coal-winning machine drill bit.
The utility model relates to a coal mining machine drill bit, which comprises a drill rod and a blade arranged on the drill rod,
the blades are distributed on the cutter head, the cutter head is arranged at the front end of the drill rod and is in a circular disc shape, and a through hole is formed in the center of the cutter head.
The drill rod is a hollow drill rod with a through hole, and two ends of the through hole of the drill rod are respectively connected to the central through hole of the cutter head and the upper end of the coal mining conveyor.
The coal mining machine drill bit is characterized in that the blades are sheet-shaped, and a plurality of blades are radially distributed on the cutter head; the blade comprises a blade tip, a blade tail, a blade back and a blade edge, wherein the blade tip and the blade tail are arranged on the left side and the right side of the blade; the back of the knife is arranged at the rear side of the blade, and the edge of the knife is arranged at the front side of the blade; the knife back is fixed on the cutter head, the knife tip extends out of the excircle of the cutter head, and the knife tail extends into the central through hole of the cutter head.
The coal cutter drill bit is characterized in that the cutter blade is curved, and a virtual plane is arranged at the front end of the cutter head and is vertical to the central axis of the cutter head; the cutting edges of all the blades are aligned on the virtual plane;
the front end surface of the cutter head is inclined, specifically, the edge of the front end surface of the cutter head, which is close to the excircle, protrudes forwards, and the edge, which is close to the inner circle, inclines backwards; the width of the tool tip is smaller than that of the tool tail;
the tool tip to the tool tail are arc-shaped, and specifically, the projection of the blade on a virtual plane is arc-shaped;
the blade to the blade back are arc-shaped, specifically, the blade inclines to the cutting direction.
The coal cutter drill bit is characterized in that the drill rod is composed of an external rotatable shaft sleeve and a hollow shaft in the shaft sleeve, a cutter head is fixed on the front end face of the shaft sleeve, and a driving gear is arranged at the rear end of the shaft sleeve;
the center of the hollow shaft is a through hole, and the rear end of the hollow shaft is fixed on the front side surface of a rocker arm of the coal mining machine.
According to the coal mining machine drill bit, specifically, the central through hole of the hollow shaft penetrates through the rocker arm and is connected to the upper end of the coal mining conveyor.
The coal mining machine drill bit is characterized in that a discharge pipe is arranged on the rear side face of the rocker arm, the discharge end of the discharge pipe is arranged at the upper end of the conveyor, and the discharge pipe is communicated with a central through hole of the hollow shaft.
The coal mining machine drill bit is characterized in that a bearing is arranged between the outer wall of the hollow shaft and the inner wall of the shaft sleeve.
The coal mining machine drill bit is characterized in that a discharge cylinder extending along the central through hole is arranged at the rear end of the cutter head, the discharge cylinder extends into the hollow shaft, and discharge plates are spirally distributed on the inner wall of the discharge cylinder.
The coal mining machine drill bit is characterized in that the rocker arm is provided with a driving motor, and the driving motor is in transmission connection with the driving gear.
The coal mining machine drill bit is characterized in that a driving device protective shell is arranged on the rocker arm, and the driving device protective shell surrounds the output ends of the driving gear and the driving motor.
The utility model has the advantages that:
the utility model discloses the blade of drill bit front end scrapes from the coal wall and gets coal, and coal is scraped and is got after the breakage, directly falls into the inboard of blade, because the radial distribution of blade is on the blade disc to rotatory, in coal was drawn into the row of material section of thick bamboo in the centre, row expect that a section of thick bamboo inner wall spiral distributes the stripper and further with coal to the propelling movement of rear, then directly fall into on the coal mining scraper conveyor.
Consequently the utility model discloses the coal of exploitation will directly fall into scraper conveyor on, saved a large amount of time to scraper conveyor facial make-up coal, improved the efficiency of exploitation coal, reduced the cost of exploitation coal.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a schematic view of the distribution of the blades of the present invention on the cutter head;
FIG. 3 is a schematic view of the mounting slots on the cutterhead;
FIG. 4 is a cross-sectional view of the cutter head;
FIG. 5 is a cross-sectional view of a hollow shaft;
FIG. 6 is a cross-sectional view of the sleeve;
FIG. 7 is a schematic view of the present invention mounted on a rocker arm;
fig. 8 is a schematic view of the present invention installed on a coal mining machine.
Wherein: a blade 1; a blade 1-1; 1-2 of a knife back; 1-3 cutter points; 1-4 of cutter tail; a cutter head 2; a shaft sleeve 3; a bearing 4; a drive gear 5; a drive device protective case 6; a rocker arm 7; a discharge pipe 8; a screw 9; a cloth discharging plate 10; slotting 11; a discharge cylinder 12; a hollow shaft 13; a drive motor 14; a link means 15; a flight conveyor 16.
Detailed Description
Referring to fig. 7 and 8, the present invention is installed on a rocker arm 7, the rocker arm 7 is installed on a coal mining machine, and the coal mining machine straddles on a scraper conveyor 16.
Example one:
the whole drill rod is in a hollow state, and two ends of the through hole of the drill rod are respectively connected into the central through hole of the cutter head 2 and the discharging pipe 8.
Referring to fig. 1, the drill rod is specifically composed of a shaft sleeve 3 and a hollow shaft 13 in the shaft sleeve 3, the shaft sleeve 3 is a rotating component, and the hollow shaft 13 is a fixed component fixed on the rocker arm 7, in this example, the hollow shaft and the rocker arm 7 are integrally arranged. In the machining process, a welding process can be adopted to fix the hollow shaft and the rocker arm 7, and a large-scale forging process can also be used.
Referring to fig. 1, 5 and 6, a bearing 4 is arranged between the outer wall of the hollow shaft and the inner wall of the shaft sleeve 3. The bearings 4 are provided with at least three, two of which are arranged at the front end and use larger bearings, the front end is a cutting part and bears larger impact, and the other one is arranged at the rear end, mainly the driving gear 5 and is mainly used for bearing the impact force of gear meshing. Because the cutter head 2 is firstly contacted with the coal seam and then cuts the coal seam, the outer diameter of the cutter head 2 is larger than that of the driving gear 5, so that the outer diameter of the driving gear 5 is smaller than that of the cutter head 2, the mounting space of a bearing at the rear end of the driving gear 5 is smaller, and a smaller bearing can be adopted.
The fixed blade disc 2 of the preceding terminal surface of axle sleeve 3, the external diameter of blade disc 2 is the same with the front end diameter of axle sleeve 3, and blade disc 2 passes through the screw 9 to be fixed in the front end of axle sleeve 3, and consequently, blade disc 2 is detachable with axle sleeve 3 and is connected, opens the screw from the preceding terminal surface axial of blade disc 2, and then the screw is screwed in and the screw is fixed with axle sleeve 3. The screw mounting is as balanced and as dense as possible to bear the coal mining impact force.
The rear end of the shaft sleeve 3 is provided with a driving gear 5; the driving motor 14 is in transmission connection with the driving gear 5. Because the required cutting force is particularly large during coal mining, two cutting driving motors are generally mounted on the rocker arm 7 side by side, and respective output power is distributed to the driving gear 5, only one motor is illustrated in the drawing of the example, and two driving motors are generally arranged in the field, and only proper adjustment design needs to be made on the rocker arm 7, so that the two driving motors can be mounted.
The driving motor selected in the example is an MG900/2245-GWD type explosion-proof cutting motor, the power of the motor is 900KW, the rated voltage is 3300V, the rated current is 180A, and the rotating speed is as follows: 1488r/min, external dimension: phi 880 mm.
Of course, the design parameters of the motor are not limited to the above-mentioned parameters, depending on the diameter of the cutter head 2, the coal quality of the coal seam concerned, and the working place.
In the example, the outer diameter of the cutter head 2 is 800mm, the rotating speed of the cutter head 2 is 90r/min, the length 1406 of the rocker arm 7 is adopted, and the coal seam mining height applicable to the example is about 1.4 m.
The driving device protection shell 6 is fixed on the inner side of the rocker arm 7 through screws, the driving device protection shell 6 mainly prevents coal from jumping between gears, the driving device protection shell 6 surrounds the output ends of the driving gear 5 and the driving motor, and surrounds a link device 15 of the rocker arm 7, wherein the link device is linked with a coal mining machine.
The central through hole of the hollow shaft passes through the rocker arm 7 and is communicated with a discharge pipe 8 at the rear end.
The discharge pipe 8 is arranged on the rear side surface of the rocker arm 7, and the discharge end of the discharge pipe 8 is arranged at the upper end of the conveyor.
Referring to fig. 4, the rear end of the cutter head 2 is provided with a discharge cylinder 12 extending along the central through hole, the discharge cylinder extends into the hollow shaft, and the inner wall of the discharge cylinder 12 is spirally provided with a discharge plate 10. The height of the discharge plates 10 is 50-100mm, in the rotating process, coal falls into a groove formed among the discharge plates 10, and the discharge cylinder pushes the coal to the rear when continuing to rotate, pushes the coal into the discharge pipe 8 and then directly falls above the scraper conveyor. The rear end of the discharge pipe 8 turns downwards and is right opposite to the conveying groove of the scraper conveyor.
Example two:
referring to fig. 2, 10-12 blades 1 are radially distributed on the cutter head 2, and 12 blades are used in this example. The cutter head 2 is arranged at the front end of the drill rod, the cutter head 2 is in a circular disc shape, and a through hole is formed in the center of the cutter head.
The front end face of the cutter head 2 is inclined, and when seen from a sectional view, the edge of the front end face of the cutter head 2 close to the excircle protrudes forwards, and the edge close to the inner circle inclines backwards. The inclined surface may be a circular arc surface, and a straight line surface is used in this example.
The blade 1 is sheet-shaped, the blade 1 comprises a blade tip 1-3, a blade tail 1-4, a blade back 1-2 and a blade edge 1-1, and the blade tip and the blade tail are arranged on the left side and the right side of the blade 1; the back of the knife is at the rear side of the blade 1 and the edge is at the front side of the blade 1.
The back of a knife blade is fixed on blade disc 2, and fixed mode can be fixed through the bolt, and welded mode is fixed, but when the bolt is fixed, the position of the bolt that can design is not enough, therefore fixed effect is unknown. The fixed blade 1 and the cutter head 2 are welded integrally, so that the fixing effect is very good, and high impact force can be borne, but when one blade 1 needs to be replaced due to breakage, the blade 1 cannot be replaced independently.
With reference to fig. 3, the manner of fixing the blade 1 in this example is: a notch 11 is arranged on the cutter head 2 at the position of a cutter back, the notch extends from the outer edge of the cutter head 2 to the inner edge of the cutter head 2, the notch at the outer edge of the cutter head 2 is larger in the width of the notch 11 and gradually shrinks to the inner edge of the cutter head 2 in a narrow mode, the opened notch is narrow at the top and wide at the bottom, the shape of the cutter back is matched with that of the notch, when the blade 1 is installed, the cutter back can be gradually inserted into the notch 11 from the outer circle, the cutter tip part is knocked inwards by a soft hammer, and knocking is carried out. Because the orientation of the tool nose is consistent with the cutting direction (consistent with the rotation direction of the cutter head 2), the blade 1 can not fall off in the working process.
The tool tip extends out of the excircle of the cutter head 2, and the tool tail extends into the central through hole of the cutter head 2.
The blade 1 is curved, and a virtual plane is arranged at the front end of the cutter head 2 and is vertical to the central axis of the cutter head 2; the cutting edges of all the blades 1 are aligned on the virtual plane; in actual coal mining, the virtual plane is the coal seam, and the cutting edge can uniformly cut coal in the plane.
Referring to fig. 2, the blade tip to the blade tail are arc-shaped, specifically, the projection of the blade 1 on the virtual plane is arc-shaped. The blade to the blade back are arc-shaped, specifically, the blade inclines to the cutting direction. The width of the knife tip is less than that of the knife tail. The shape of the blade 1 is therefore twisted as a whole, designed for the purpose of: the cut coal is extruded in the included angle between the blade 1 and the cutter head 2, and after the coal is continuously cut, the newly cut coal is extruded to the central discharge cylinder while the coal in the interlayer is gradually extruded to the rear side, so that the cut coal is extruded into the discharge cylinder.
Therefore, the utility model discloses follow the blade disc of front end, to the hollow shaft in the middle of, to the rocking arm in back again, all be the through-hole that link up to with arrange the material pipe and couple together, constitute the coal that comes down the cutting and walk the passageway on the scraper conveyor.
Example three:
in this example, the outer diameter of the cutter head 2 is 800mm, and the inner diameter of the cutter head 2 is 3800 and 4200 mm. The knife tip exceeds the outer diameter of the cutter head 2 by 100mm, and the knife tip extends into the inner edge of the cutter head 2 by 10 mm. The curvature radian of the blade 1 projected on the virtual plane at the front end of the cutter head 2 is as follows: radius 530 mm.
The above is an exemplary description of the present invention, and does not represent the protection scope of the present invention.
Claims (10)
1. A coal mining machine drill bit comprises a drill rod and a blade arranged on the drill rod, and is characterized in that,
the blades are distributed on the cutter head, the cutter head is arranged at the front end of the drill rod and is in a circular disc shape, and a through hole is formed in the center of the cutter head;
the drill rod is a hollow drill rod with a through hole, and two ends of the through hole of the drill rod are respectively connected to the central through hole of the cutter head and the upper end of the coal mining conveyor.
2. The shearer drill according to claim 1, wherein the blades are sheet-shaped, and a plurality of blades are radially distributed on the cutter head; the blade comprises a blade tip, a blade tail, a blade back and a blade edge, wherein the blade tip and the blade tail are arranged on the left side and the right side of the blade; the back of the knife is arranged at the rear side of the blade, and the edge of the knife is arranged at the front side of the blade; the knife back is fixed on the cutter head, the knife tip extends out of the excircle of the cutter head, and the knife tail extends into the central through hole of the cutter head.
3. The shearer drill according to claim 2, wherein the cutter blades are curved, and a virtual plane is formed at the front end of the cutter head and perpendicular to the central axis of the cutter head; the cutting edges of all the blades are aligned on the virtual plane;
the front end surface of the cutter head is inclined, specifically, the edge of the front end surface of the cutter head, which is close to the excircle, protrudes forwards, and the edge, which is close to the inner circle, inclines backwards; the width of the tool tip is smaller than that of the tool tail;
the tool tip to the tool tail are arc-shaped, and specifically, the projection of the blade on a virtual plane is arc-shaped;
the blade to the blade back are arc-shaped, specifically, the blade inclines to the cutting direction.
4. The shearer drill according to claim 1, wherein the drill rod is composed of an external rotatable shaft sleeve and a hollow shaft in the shaft sleeve, the front end surface of the shaft sleeve is fixed with a cutter head, and the rear end is provided with a driving gear;
the center of the hollow shaft is a through hole, and the rear end of the hollow shaft is fixed on the front side surface of a rocker arm of the coal mining machine.
5. The shearer drill according to claim 4, wherein the hollow shaft central through hole passes through the rocker arm and is connected to the upper end of the coal mining conveyor.
6. The shearer drill according to claim 5, wherein the rear side of the rocker arm is provided with a discharge pipe, a discharge end of the discharge pipe is provided at an upper end of the conveyor, and the discharge pipe is communicated with the central through hole of the hollow shaft.
7. The shearer drill according to claim 4, wherein a bearing is provided between the outer wall of the hollow shaft and the inner wall of the sleeve.
8. The shearer drill according to claim 4, wherein the rear end of the cutter head is provided with a discharge cylinder extending along the central through hole, the discharge cylinder extends into the hollow shaft, and the inner wall of the discharge cylinder is spirally provided with the stripper plates.
9. The shearer drill according to claim 4, wherein the rocker arm is provided with a drive motor, and the drive motor is in driving connection with the drive gear.
10. The shearer drill according to claim 4, wherein the rocker arm is provided with a drive unit shield, the drive unit shield surrounding the drive gear and the output of the drive motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020354494.4U CN211777409U (en) | 2020-03-19 | 2020-03-19 | Coal mining machine drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020354494.4U CN211777409U (en) | 2020-03-19 | 2020-03-19 | Coal mining machine drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211777409U true CN211777409U (en) | 2020-10-27 |
Family
ID=72932303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020354494.4U Expired - Fee Related CN211777409U (en) | 2020-03-19 | 2020-03-19 | Coal mining machine drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211777409U (en) |
-
2020
- 2020-03-19 CN CN202020354494.4U patent/CN211777409U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |