CN104594893A - Cutting part of bottom cleaning drum shearer for thin coal seams - Google Patents
Cutting part of bottom cleaning drum shearer for thin coal seams Download PDFInfo
- Publication number
- CN104594893A CN104594893A CN201410841992.0A CN201410841992A CN104594893A CN 104594893 A CN104594893 A CN 104594893A CN 201410841992 A CN201410841992 A CN 201410841992A CN 104594893 A CN104594893 A CN 104594893A
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- cutting
- cutting drum
- drive cavity
- spraying system
- housing
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- 238000005520 cutting process Methods 0.000 title claims abstract description 176
- 239000003245 coal Substances 0.000 title abstract description 42
- 238000004140 cleaning Methods 0.000 title abstract 2
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims description 39
- 238000009966 trimming Methods 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 16
- 230000008859 change Effects 0.000 abstract description 10
- 238000005065 mining Methods 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 description 10
- 230000001965 increasing effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
Abstract
The invention provides a cutting part of a bottom cleaning drum shearer for thin coal seams. The cutting part is characterized in that a cutting part shell comprises a first cutting drum transmission cavity shell, a transition section shell and a second cutting drum transmission cavity shell; the first cutting drum transmission cavity shell extends out of ledges of a middle groove and transition groove of a scraper conveyer towards the coal wall side via the transition section shell and bends towards the lower part; a top slope cut edge structure and a bottom slope cut edge structure are arranged at the rear end of the transition section shell; inner cavity flanges of first and second planetary mechanisms are respectively connected with inner cavity flanges of the first and second cutting drum transmission cavity shells by bolts; outer end face key grooves of the first and second planetary mechanisms are respectively positioned together with outer end face key grooves of the first and second cutting drum transmission cavity shells by end face flat keys. The cutting part can be used for effectively solving the problem of triangle coal and satisfy the minimum mining height conditions and the adaptability to change of the thickness of coal seams, and conduces to improving the coal charging effects.
Description
Technical field
The present invention relates to coal-cutting machinery field, particularly formula flitting cutting units of a kind of girdle clear end.
Background technology
At present, girdle flitting requires and Coal Seam Thickness Change compliance for meeting coal seam thickness, and the cutting drum diameter of selection is less, thus causes the depth of blade of cutting drum more shallow, has a strong impact on effect of loading coal.Need again to adopt curved rocker structure to add serious offense coal mouth, then cause the cutting drum amount of caunching less.In addition, in order to ensure the shovel spacing of cutting drum, the housing of cutting units straight-tooth driven end need ride over above channel for scraper transporter, then cause cutting drum planted agent to measure less.Due to the amount of caunching and planted agent amount all less, thus cause coal-winning machine working face compliance and Coal Seam Thickness Change compliance poor.
Simultaneously, the transition frame ledge at drag conveyor two ends above with the inclined-plane increased gradually, the housing of cutting units straight-tooth driven end so far has to raise in position, scrapper conveyor head and tail place is so just made easily to be formed " Triangle Coal ", " Triangle Coal " usually needs manually after being formed or other auxiliary equipment are cleared up, the operating efficiency of coal-winning machine can be made like this to reduce, but also extra cost can be increased.
These problems have a strong impact on the raising of production efficiency, in order to solve, effect of loading coal is poor, the amount of caunching and planted agent measure too small and " Triangle Coal " problem, usually take to strengthen cutting drum diameter, change the planetary mechanism number of teeth and modulus, reduce rocking arm flexibility, increase spillplate, reduce the method such as channel for scraper transporter height and lead-over groove gradient.But strengthen that although coal-winning machine cutting drum diameter effectively can solve that effect of loading coal is low, the amount of caunching and planted agent measure too small and " Triangle Coal " problem, but be subject to specific mining height restriction and along with the increasing of cutting drum diameter, the compliance of coal-winning machine to Coal Seam Thickness Change is poorer, required clipping force is also larger, the overall performance of cutting power and cutting units just needs corresponding increase to size, and machine-building cost and technological requirement also want corresponding raising; Adopt the change planetary mechanism number of teeth and modulus to reduce planetary mechanism external diameter, increase the depth of blade of cutting drum, although can improve effect of loading coal, the strength of gear teeth of planetary mechanism and bearing life can reduce accordingly; Reduce rocking arm flexibility, although can the amount of caunching be increased, have a strong impact on the size of coal mouth; Increasing spillplate causes shovel spacing to increase, and effect of loading coal fails effectively to improve; Reduce channel for scraper transporter height and lead-over groove gradient, although planted agent can be increased measure minimizing " Triangle Coal ", have a strong impact on scrapper conveyor overall performance.Can find out, adopt said method, coal-winning machine effect of loading coal is poor, the problem of working face bad adaptability, Coal Seam Thickness Change bad adaptability and " Triangle Coal " fails effectively solution.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides formula flitting cutting units of a kind of girdle clear end, effectively can solve the problem of " Triangle Coal ", adapt to thin seam mining, meet the compliance of minimum mining height condition and Coal Seam Thickness Change, improve coal-winning machine effect of loading coal, provide enough cutting drum amounts of caunching to measure to meet to combine with planted agent and adopt condition, thus reach that processing is simple, strong adaptability and the object of effectively enhancing productivity.
To achieve these goals, the invention provides formula flitting cutting units of a kind of girdle clear end, comprise cutting units housing, cutting motor, clutch, straight-tooth transmission system, first cutting drum, second cutting drum, first planet mechanism and the second planetary mechanism, described cutting motor, clutch and straight-tooth transmission system are all arranged in the inner chamber of cutting units housing, and the power that cutting motor exports reaches straight-tooth transmission system by clutch, first planet mechanism and the second planetary mechanism is reached respectively after straight-tooth transmission system slows down shunting, the first cutting drum and the second cutting drum is exported respectively to again after first planet mechanism and the second planetary mechanism slow down, described cutting units housing is by the first cutting drum drive cavity housing, the overall structure of transition section shell and the second cutting drum drive cavity housing composition, described first cutting drum drive cavity housing to be extended to rib side beyond the ledge of the middle pan of scraper conveyor and lead-over groove by transition section shell and lower portion bends, described transition section shell rear end is provided with top bevel trimming structure and bottom bevel trimming structure, described second cutting drum drive cavity housing is provided with the connecting portion be connected with oil cylinder with shearer hauled-part, the inner chamber flange of described first planet mechanism and the second planetary mechanism is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing, and the outer face keyway of described first planet mechanism and the second planetary mechanism is located respectively by the outer face keyway of end face flat key and the first cutting drum drive cavity housing and the second cutting drum drive cavity housing.
Further, the bolt place that the inner chamber flange of described first planet mechanism, the second planetary mechanism is connected with the first cutting drum drive cavity housing, the second cutting drum drive cavity housing is provided with gland, and gland is pressed on bolt by described straight-tooth transmission system.
Further, the length of described first cutting drum and the first cutting drum drive cavity housing length sum of extending to rib side is equal with the length of the second cutting drum.
Further, the direction of rotation of described first cutting drum and the second cutting drum is contrary, and rotating speed is identical, and the blade screw direction of described first cutting drum and the second cutting drum is contrary.
Further, also comprise the first internal spraying system, the second internal spraying system and external spraying system, described first internal spraying system and the second internal spraying system are separately positioned in first planet mechanism and the second planetary mechanism, the water channel of described first internal spraying system, the second internal spraying system and external spraying system is all laid on cutting units housing, described first cutting drum, the second cutting drum with cutting units housing is arranged respectively the nozzle be connected with external spraying system with the first internal spraying system, the second internal spraying system.
Girdle provided by the invention clear end formula flitting cutting units, first cutting drum drive cavity housing to extend to beyond the ledge of the middle pan of scraper conveyor and lead-over groove by transition section shell to rib side, and transition section shell rear end is provided with top bevel trimming structure and bottom bevel trimming structure, make cutting units have enough amounts of caunching and planted agent amount to adapt to Coal Seam Thickness Change, meet to combine and adopt requirement, avoid the formation at scrapper conveyor frame head and tail place " Triangle Coal "; By the first cutting drum drive cavity housing lower portion warp architecture, effectively can reduce the center to center distance between two cutting drums, increase coal mouth, strengthen the effect of coalingging combining between two cutting drums; Be connected and outward flange key slot ends flat key location combined structure with the inner chamber flange bolt on the second planetary mechanism by first planet mechanism, the external diameter of planetary mechanism can be reduced, and then the degree of depth of cutting drum blade can be increased, improve effect of loading coal, increase the bonding strength of planetary mechanism and cutting units housing, improve efficiency of assembling and interchangeability, and there is more flexibility in manufacturing process; By arranging gland structure, effectively bolt looseness can be prevented, without the need to pretension bolt again, coal-winning machine productivity ratio can be can effectively improved when overhauling; By arranging two cutting drum structures, the distance of the second cutting drum and drag conveyor is less on the one hand, has good load bearing stength, improves effect of loading coal; Two cutting drums work on a coal-face simultaneously on the other hand, play gear coal and combined reinforced effect of coalingging, and improve utilization rate and the application life of cutting drum pick simultaneously, optimize cutting units overall performance, ensure the stability of coal-winning machine complete machine; By the setting of the first internal spraying system, the second internal spraying system and external spraying system, can make that the area coverage of water channel in this cutting units is large, the water yield is many and safe and reliable, effectively minimizing accident can occur and the maintenance and repair time, thus more effectively cool transmission system and fire extinguishing depositing dust.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the expansion sectional structure schematic diagram at Tu1Yan Ge center;
Fig. 3 is the A-A sectional structure schematic diagram of Fig. 1;
Fig. 4 is the partial enlargement structural representation that planetary mechanism is connected with cutting units housing;
Fig. 5 is the partial structurtes schematic diagram overlooked of Fig. 1.
In figure: 1, cutting units housing, 2, the second cutting drum drive cavity housing, 3, transition section shell, 4, top bevel trimming, 5, bottom bevel trimming, 6, the first cutting drum drive cavity housing, 7, cutting motor, 8, clutch, 9, straight-tooth transmission system, 10, first planet mechanism, the 11, second planetary mechanism, the 12, first internal spraying system, 13, the second internal spraying system, 14, the first cutting drum, the 15, second cutting drum, 16, external spraying system, 17, end face flat key, 18, gland, 19, inner chamber flange, 20, outer face keyway.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Fig. 1 to Fig. 5, formula flitting cutting units of a kind of girdle clear end, comprise cutting units housing 1, cutting motor 7, clutch 8, straight-tooth transmission system 9, first cutting drum 14, second cutting drum 15, first planet mechanism 10 and the second planetary mechanism 11, described cutting motor 7, clutch 8 and straight-tooth transmission system 9 are all arranged in the inner chamber of cutting units housing 1, and the power that cutting motor 7 exports reaches straight-tooth transmission system 9 by clutch 8, first planet mechanism 10 and the second planetary mechanism 11 is reached respectively after straight-tooth transmission system 9 slows down shunting, the first cutting drum 14 and the second cutting drum 15 is exported respectively to again after first planet mechanism 10 and the second planetary mechanism 11 slow down, described first cutting drum 14 is fixedly connected with the second planetary mechanism 11 with first planet mechanism 10 respectively with the second cutting drum 15, described cutting units housing 1 is by the first cutting drum drive cavity housing 6, the overall structure of transition section shell 3 and the second cutting drum drive cavity housing 2 composition, can ensure that cutting units has enough load bearing stengths and stability like this, described first cutting drum drive cavity housing 6 to be extended to rib side beyond the ledge of the middle pan of scraper conveyor and lead-over groove by transition section shell 3 and lower portion bends, first cutting drum drive cavity housing 6 is without the need to riding over above channel for scraper transporter, can directly by outside the middle pan of scraper conveyor and lead-over groove to crossheading, avoid the formation at scrapper conveyor frame head and tail place " Triangle Coal ", and first cutting drum drive cavity housing 6 lower portion bend, can not only ensure that cutting units has larger coal mouth excessively, and the center to center distance that can reduce between two cutting drums, strengthen the effect of coalingging combining between two cutting drums, described transition section shell 3 rear end is provided with top bevel trimming 4 structure and bottom bevel trimming 5 structure, cutting units top bevel trimming 4 operationally can lean against on hydraulic support backplate, thus ensure that the first cutting drum 14 has enough amounts of caunching, bottom bevel trimming 6 can ride on channel for scraper transporter, thus ensure that the first cutting drum 14 has enough planted agent's amounts, such cutting units has enough amounts of caunching and planted agent measures to adapt to Coal Seam Thickness Change, meet to combine and adopt requirement, described second cutting drum drive cavity housing 2 is provided with the connecting portion be connected with oil cylinder with shearer hauled-part, the lifting of cutting units can be regulated like this by oil cylinder, the inner chamber flange 19 of described first planet mechanism 10 and the second planetary mechanism 11 is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing 6 and the second cutting drum drive cavity housing, the outer face keyway 20 of described first planet mechanism 10 and the second planetary mechanism 11 is located respectively by the outer face keyway of end face flat key 17 and the first cutting drum drive cavity housing 6 and the second cutting drum drive cavity housing 2, the external diameter of planetary mechanism is effectively reduced like this under the condition not changing the planetary mechanism gear number of teeth and modulus, and then the degree of depth of cutting drum blade can be increased, improve effect of loading coal, increase the bonding strength of planetary mechanism and cutting units housing 1, improve efficiency of assembling and interchangeability, and there is more flexibility in manufacturing process.
The bolt place that the inner chamber flange 19 of described first planet mechanism 10, second planetary mechanism 11 is connected with the first cutting drum drive cavity housing 6, second cutting drum drive cavity housing 2 is provided with gland 18, and gland 18 is pressed on bolt by described straight-tooth transmission system 9.Effectively bolt falling can be prevented like this, without the need to pretension bolt again, coal-winning machine productivity ratio can be can effectively improved when overhauling.
The length sum that the length of described first cutting drum 14 and the first cutting drum drive cavity housing 6 extend to rib side is equal with the length of the second cutting drum 15.The cut degree of depth of two cutting drums is identical, ensure cutting units stability under loading and good coal winning technology, and the second cutting drum 15 is mined without the need to planted agent, enough large shovel spacing need not be ensured, second cutting drum 15 is less with the distance of drag conveyor, not only make the second cutting drum 15 have good load bearing stength, and can also effect of loading coal be improved.
The direction of rotation of described first cutting drum 14 and the second cutting drum 15 is contrary, and rotating speed is identical, and the blade screw direction of described first cutting drum 14 and the second cutting drum 15 is contrary.Two cutting drums work composition two-screw conveyer on a coal-face simultaneously, increase helical blade total amount and floor area ratio, thus greatly reduce float coal amount, play gear coal and combined reinforced effect of coalingging, improve utilization rate and the application life of cutting drum pick simultaneously, optimize cutting units overall performance, ensure the stability of coal-winning machine complete machine.
Also comprise the first internal spraying system 12, second internal spraying system 13 and external spraying system 16, described first internal spraying system 12 and the second internal spraying system 13 are separately positioned in first planet mechanism 10 and the second planetary mechanism 11, the water channel of described first internal spraying system 12, second internal spraying system 13 and external spraying system 16 is all laid on cutting units housing 1, described first cutting drum 14, second cutting drum 15 with cutting units housing 1 is arranged respectively the nozzle be connected with external spraying system 16 with the first internal spraying system 12, second internal spraying system 13.The water channel of press water respectively on cutting units housing 1 flows into, and the nozzle ejection respectively on the first cutting drum 14, second cutting drum 15 and cutting units housing 1, replace the structure of original external rubber hose, the area coverage of water channel is large, the water yield is many and safe and reliable, not easily leak, minimizing accident occurs and the maintenance and repair time, thus more effectively cools transmission system and fire extinguishing depositing dust.
Described first planet mechanism is identical with the component of the second planetary mechanism.Like this installation and maintenance can be convenient to.
Claims (5)
1. a girdle clear end formula flitting cutting units, comprise cutting units housing (1), cutting motor (7), clutch (8), straight-tooth transmission system (9), first cutting drum (14), second cutting drum (15), first planet mechanism (10) and the second planetary mechanism (11), described cutting motor (7), clutch (8) and straight-tooth transmission system (9) are all arranged in the inner chamber of cutting units housing (1), and the power that cutting motor (7) exports reaches straight-tooth transmission system (9) by clutch (8), first planet mechanism (10) and the second planetary mechanism (11) is reached respectively after straight-tooth transmission system (9) slows down shunting, the first cutting drum (14) and the second cutting drum (15) is exported respectively to again after first planet mechanism (10) and the second planetary mechanism (11) slow down, it is characterized in that,
Described cutting units housing (1) is by the first cutting drum drive cavity housing (6), the overall structure that transition section shell (3) and the second cutting drum drive cavity housing (2) form, described first cutting drum drive cavity housing (6) to be extended to rib side beyond the ledge of the middle pan of scraper conveyor and lead-over groove by transition section shell (3) and lower portion bends, described transition section shell (3) rear end is provided with top bevel trimming (4) structure and bottom bevel trimming (5) structure, described second cutting drum drive cavity housing (2) is provided with the connecting portion be connected with oil cylinder with shearer hauled-part,
The inner chamber flange (19) of described first planet mechanism (10) and the second planetary mechanism (11) is respectively by the inner chamber Flange joint of bolt and the first cutting drum drive cavity housing (6) and the second cutting drum drive cavity housing, and the outer face keyway (20) of described first planet mechanism (10) and the second planetary mechanism (11) is located respectively by the outer face keyway of end face flat key (17) with the first cutting drum drive cavity housing (6) and the second cutting drum drive cavity housing (2).
2. formula flitting cutting units of a kind of girdle clear end according to claim 1, it is characterized in that, the bolt place that the inner chamber flange (19) of described first planet mechanism (10), the second planetary mechanism (11) is connected with the first cutting drum drive cavity housing (6), the second cutting drum drive cavity housing (2) is provided with gland (18), and gland (18) is pressed on bolt by described straight-tooth transmission system (9).
3. formula flitting cutting units of a kind of girdle clear end according to claim 1, it is characterized in that, the length sum that the length of described first cutting drum (14) and the first cutting drum drive cavity housing (6) extend to rib side is equal with the length of the second cutting drum (15).
4. the formula flitting cutting units of a kind of girdle clear end according to any one of claims 1 to 3, it is characterized in that, the direction of rotation of described first cutting drum (14) and the second cutting drum (15) is contrary, rotating speed is identical, and the blade screw direction of described first cutting drum (14) and the second cutting drum (15) is contrary.
5. the formula flitting cutting units of a kind of girdle clear end according to any one of claims 1 to 3, it is characterized in that, also comprise the first internal spraying system (12), second internal spraying system (13) and external spraying system (16), described first internal spraying system (12) and the second internal spraying system (13) are separately positioned in first planet mechanism (10) and the second planetary mechanism (11), described first internal spraying system (12), the water channel of the second internal spraying system (13) and external spraying system (16) is all laid on cutting units housing (1), described first cutting drum (14), second cutting drum (15) and cutting units housing (1) are arranged and the first internal spraying system (12) respectively, the nozzle that second internal spraying system (13) is connected with external spraying system (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841992.0A CN104594893B (en) | 2014-12-30 | 2014-12-30 | A kind of clear bottom formula flitting cutting units of girdle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410841992.0A CN104594893B (en) | 2014-12-30 | 2014-12-30 | A kind of clear bottom formula flitting cutting units of girdle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104594893A true CN104594893A (en) | 2015-05-06 |
| CN104594893B CN104594893B (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410841992.0A Active CN104594893B (en) | 2014-12-30 | 2014-12-30 | A kind of clear bottom formula flitting cutting units of girdle |
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| Country | Link |
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| CN (1) | CN104594893B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952705A (en) * | 2018-08-24 | 2018-12-07 | 江苏中机矿山设备有限公司 | A kind of hard girdle lump coal coalcutter and coal-mining method |
| CN112628361A (en) * | 2020-12-23 | 2021-04-09 | 中国煤炭科工集团太原研究院有限公司 | Coal mine tunneling equipment |
| CN114017023A (en) * | 2021-12-01 | 2022-02-08 | 永城煤电控股集团有限公司 | Geological coal mining device |
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| CN102359373A (en) * | 2011-10-27 | 2012-02-22 | 中国矿业大学 | Drum shearer cutting part |
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| CN204571981U (en) * | 2014-12-30 | 2015-08-19 | 江苏中机矿山设备有限公司 | Girdle clear end formula flitting cutting units |
-
2014
- 2014-12-30 CN CN201410841992.0A patent/CN104594893B/en active Active
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| US5964507A (en) * | 1997-10-20 | 1999-10-12 | Mining Technologies, Inc. | Transmission gearcase for multiple cutting heads |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952705A (en) * | 2018-08-24 | 2018-12-07 | 江苏中机矿山设备有限公司 | A kind of hard girdle lump coal coalcutter and coal-mining method |
| CN112628361A (en) * | 2020-12-23 | 2021-04-09 | 中国煤炭科工集团太原研究院有限公司 | Coal mine tunneling equipment |
| CN114017023A (en) * | 2021-12-01 | 2022-02-08 | 永城煤电控股集团有限公司 | Geological coal mining device |
| CN114017023B (en) * | 2021-12-01 | 2023-10-27 | 永城煤电控股集团有限公司 | Mining device for geological coal |
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| CN104594893B (en) | 2018-02-16 |
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Effective date of registration: 20220328 Address after: 221000 No.1 Huatai Road, No.3 Industrial Park, Xuzhou hi tech Industrial Development Zone, Jiangsu Province Patentee after: Guoke Zhongmai (Xuzhou) Energy Technology Co.,Ltd. Address before: 221116 Huatai Road, high tech Industrial Development Zone, Xuzhou City, Jiangsu Province Patentee before: JIANGSU ZHONGJI MINE EQUIPMENT Co.,Ltd. |
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Application publication date: 20150506 Assignee: Shanghai Lingang Financial Leasing Co.,Ltd. Assignor: Guoke Zhongmai (Xuzhou) Energy Technology Co.,Ltd. Contract record no.: X2022980015643 Denomination of invention: A cutting part of a thin coal seam clearing type drum shearer Granted publication date: 20180216 License type: Exclusive License Record date: 20220919 |
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Denomination of invention: A cutting part of a thin coal seam clearing type drum shearer Effective date of registration: 20220920 Granted publication date: 20180216 Pledgee: Shanghai Lingang Financial Leasing Co.,Ltd. Pledgor: Guoke Zhongmai (Xuzhou) Energy Technology Co.,Ltd. Registration number: Y2022980015823 |
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Assignee: Shanghai Lingang Financial Leasing Co.,Ltd. Assignor: Guoke Zhongmai (Xuzhou) Energy Technology Co.,Ltd. Contract record no.: X2022980015643 Date of cancellation: 20221226 |
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