CN102900435B - Coal plough - Google Patents
Coal plough Download PDFInfo
- Publication number
- CN102900435B CN102900435B CN201210363754.4A CN201210363754A CN102900435B CN 102900435 B CN102900435 B CN 102900435B CN 201210363754 A CN201210363754 A CN 201210363754A CN 102900435 B CN102900435 B CN 102900435B
- Authority
- CN
- China
- Prior art keywords
- head
- plough
- coal
- coal plough
- tail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 99
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 241000219098 Parthenocissus Species 0.000 abstract 2
- 230000004888 barrier function Effects 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C27/00—Machines which completely free the mineral from the seam
- E21C27/20—Mineral freed by means not involving slitting
- E21C27/32—Mineral freed by means not involving slitting by adjustable or non-adjustable planing means with or without loading arrangements
- E21C27/34—Machine propelled along the working face by cable or chain
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chain Conveyers (AREA)
- Machines For Laying And Maintaining Railways (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses a kind of coal plough, this coal plough comprises: coal plough transport portion, planer head and the balladeur train matched with planer head, two creeper attachment; Wherein, one end of described coal plough transport portion is provided with the head driving device driving planer head, and the other end is provided with the tail-driving device driving planer head; Described planer head is arranged on described balladeur train; Described pair of creeper attachment is set around described head driving device and described tail-driving device, and drives described planer head to move back and forth along described balladeur train.Therefore, coal plough of the present invention is double-strand traction, and adopt head, the driving of tail two ends, thoroughly solve the increase along with single-chain diameter, coal plough complete machine extended height, to the technical barrier that the requirement of face height increases.
Description
Technical Field
The invention relates to the field of coal mine machinery, in particular to a coal planer.
Background
With the increasing of resource management and the substantial improvement of resource cost in China, the coal industry has entered a rapid development period. However, due to the lack of effective mining means, most of the thin coal seam accounting for 20% of the total coal resources is not mined, and at the same time, the resources of the thick coal seam are gradually exhausted, and the mining of the thin coal seam is inevitable.
At present, in main domestic coal production bases, a small part of thin coal seams are mined in a thin coal seam mining machine or blast mining mode, so that the efficiency is low, the failure rate is high, and potential safety hazards exist. The existing coal plough is mainly used for longwall mining transportation equipment of a 1.0-2.0 meter thin coal seam under a coal mine, the technology of the existing coal plough is integrated with scientific and technological achievements in the fields of multidisciplinary major such as machinery, hydraulic pressure, electronics, network control and the like, the technical content is high, the development difficulty is high, and the existing coal plough is used as a 'shallow-cut-depth and multi-cycle' coal mining equipment and has specific advantages for the thin coal seam and a large gas mine.
However, the existing coal planer adopts a single-chain traction plough head, uses a carriage as a guide rail, reciprocates along a working face, and falls coal by virtue of static pressure formed by a planer tool on a coal wall, and loads the coal into a conveyor under the action of the plough head and a carriage plough-shaped inclined plane, and the coal is circularly gradually advanced, so that continuous and automatic coal mining is realized. With the continuous maturity of the coal planer market, the requirements of the coal planer, such as hard coal planing capability, maximum installed length, large chain, large power, etc., are inevitably increased, and need to be solved.
Disclosure of Invention
In view of the above, the present invention provides a coal planer to solve the problem of the limitation of the single chain drive and the increase of the single machine drive power, and the limitation of the increase of the chain diameter to the coal planer, and to improve the adaptability of the coal planer to hard coal.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in one aspect, the present invention provides a coal plough, the coal plough comprising: the coal plough comprises a coal plough conveying part, a plough head, a sliding frame matched with the plough head and a double endless chain; one end of the coal plough conveying part is provided with a machine head driving device for driving the plough head, and the other end of the coal plough conveying part is provided with a machine tail driving device for driving the plough head; the planing head is arranged on the sliding frame; the double endless chains comprise a first endless chain and a second endless chain, the first endless chain and the second endless chain are wound on the machine head driving device and the machine tail driving device, and the first endless chain and the second endless chain respectively drive the planing head to reciprocate along the sliding frame through the chain wheel assembly.
Further, the coal plough also comprises: the machine head chain tightening device is connected with a transition groove of the conveying part of the coal plough so as to communicate the sliding frame with the machine head driving device; and the tail chain tightening device is connected with a transition groove of the conveying part of the coal plough so as to communicate the sliding frame with the tail driving device.
Further, in the coal plough, the carriage is provided with: the first operation cavity and the second operation cavity are used for accommodating the first endless chain; a third operation cavity and a fourth operation cavity for accommodating the second endless chain; the first operation cavity, the second operation cavity, the third operation cavity and the fourth operation cavity are not communicated with each other.
Further, in the above coal plough, the head driving device includes: the motor, the connecting cover, the speed reducer, the chain wheel assembly and the flange assembly are sequentially connected through bolts; wherein the machine head driving device is connected with a machine head frame of the coal plough conveying part through a flange assembly.
Further, in the above coal plough, the tail drive device includes: the motor, the connecting cover, the speed reducer, the chain wheel assembly and the flange assembly are sequentially connected through bolts; wherein the tail drive) is coupled to a tail stock of the plough conveying section via a flange assembly.
Further, in the coal plough, the plough head is connected with the carriage in a sliding fit manner.
Compared with the prior art, the invention has the following advantages:
the coal planer is double-chain traction, and the two ends of the machine head and the machine tail are adopted for driving, so that the technical problems that the height of the whole coal planer is increased and the requirement on the height of a working surface is increased along with the increase of the diameter of a single chain are thoroughly solved. In addition, the coal planer of the invention gets rid of the limitation of single-chain drive, thereby solving the technical problem of no-chain selection caused by the increase of single-machine power.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of an embodiment of the coal planer of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of the coal planer of the present invention;
FIG. 3 is a schematic view of a head driving device of an embodiment of the coal planer of the present invention;
fig. 4 is a schematic view of a carriage cavity of an embodiment of the coal planer of the present invention.
Description of the reference numerals
1 handpiece driving device
11 electric machine
12 connecting cover
13 speed reducer
14 sprocket assembly
15 Flange assembly
2 machine head chain tensioning device
3 carriage
31 first operating chamber
32 second operating chamber
33 third operating chamber
34 fourth operating chamber
36 coal plough conveying part
4 plane head
5 tail chain tensioning device
6 tail drive arrangement
7 endless chain
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The technical solution of the present invention will be described with reference to the accompanying drawings in combination with the embodiments.
The basic idea of the invention is that: a coal plough is designed, which adopts double-chain traction and drives the head and tail
Preferred embodiments of the present invention will be further described with reference to the accompanying drawings in which:
referring to fig. 1 and 2, there is shown a structure of a coal plough proposed by the present embodiment, the coal plough including: the coal planer comprises a coal planer conveying part 36, a planer head 4, a sliding frame 3 and a double endless chain 7 which are matched with the planer head.
In this embodiment, one end of the plough conveying part 36 is provided with a head driving device 1 for driving the plough head, and the other end of the plough conveying part 36 is provided with a tail driving device 6 for driving the plough head.
In this embodiment, the planing head 4 is disposed on the carriage 3, and in the working process, the planing head 4 uses the carriage 3 as a guide rail, and the planing head 4 is connected with the carriage 3 in a sliding fit manner.
As shown in fig. 3, in this embodiment, the double endless chain 7 is wound around the machine head driving device 1 and the machine tail driving device 6, that is, on the chain wheel assembly 14 in the machine head driving device 1 and the chain wheel assembly 14 driven by the machine tail driving device 6, and drives the planing head 4 to reciprocate along the carriage 3, so as to plane coal by means of static pressure formed by the planing tool on the coal wall.
Compared with the existing single-chain traction coal planer in the market, the coal planer of the embodiment is double-chain traction, adopts the driving of the two ends of the machine head and the machine tail, thoroughly solves the technical problems that the whole height of the coal planer is increased along with the increase of the diameter of a single-chain strip and the requirement on the height of a working face is increased, breaks away from the driving limitation of the single-chain strip, and further solves the technical problem that no chain can be selected due to the increase of the power of a single machine.
Therefore, with the introduction of double chain traction and the increase of single machine driving power, the output torque of the motor is increased, the coal quality and hardness of the plough head of the coal plough can be increased, the adaptability of the coal plough to hard coal is improved, and the application range of the coal plough is enlarged.
In the above embodiments, the double endless chain 7 includes: a first endless chain and a second endless chain which jointly drive the planing head 4 to reciprocate along the carriage 3 through the sprocket assembly 14.
In the above embodiments, as shown in fig. 4, the carriage 3 has:
a first operation cavity 31 and a second operation cavity 32 for accommodating the first endless chain.
A third operating cavity 33 and a fourth operating cavity 34 for accommodating the second endless chain.
The first operation cavity 31, the second operation cavity 32, the third operation cavity 33 and the fourth operation cavity 34 are not communicated with each other.
In this embodiment, a double-chain traction planing head is adopted, and four cavities are divided in the plane of the view of the carriage 3, namely the first operating cavity 31, the second operating cavity 32, the third operating cavity 33, and the fourth operating cavity 34.
In the embodiment, the carriage is not only horizontally divided into two cavities (such as a second operation cavity 32, a third operation cavity 33, a first operation cavity 31 and a fourth operation cavity 34) which are respectively used as the movement cavities of the endless chains of the double-chain coal plough, but also the cavities are of an unconnected structure, so that the endless chains in the cavities are not contacted with each other in the horizontal direction, and the two endless chains are effectively prevented from being entangled and twisted. And the two layers of spaces (such as a first operation cavity 31, a second operation cavity 32, a third operation cavity 33 and a fourth operation cavity 34) are divided into an upper layer and a lower layer in the vertical direction, the two layers of spaces are also of an unconnected structure, the endless chains in the upper cavity in the vertical direction are ensured not to be contacted with each other, the two endless chains are effectively prevented from being tangled and twisted, the lower layer in the two layers of spaces in the vertical direction is used as an operation cavity of the endless chain for transmitting power to drive the planing head to reciprocate along the working surface to realize coal planing, and the upper layer is used for returning the chain to realize the circulating operation of the chain.
In each of the above embodiments, the coal plough further includes:
the machine head chain tightening device 2 is connected with a transition groove of the coal plough conveying part 36, such as through bolts, and plays a role of communicating the through carriage 3 with the machine head driving device 1.
A tail chain tensioner 5 is connected, for example by means of bolts, to the transition channel of the plough conveyor part 36 and serves to connect the carriage 3 to the tail drive 6.
In the above embodiments, the handpiece driving apparatus 1 includes: the motor 11, the coupling cover 12, the reducer 13, the sprocket wheel assembly 14, and the flange assembly 15 may be connected in sequence by bolts, but the embodiment is not limited to this connection, and other connection manners may be implemented by matching these components. Wherein the machine head driving device 1 is connected with a machine head frame of the coal plough conveying part 36 through a flange assembly;
as shown in fig. 3, the tail drive device 6 includes: the motor 11, the coupling cover 12, the reducer 13, the sprocket wheel assembly 14, and the flange assembly 15 may be connected in sequence by bolts, but the embodiment is not limited to this connection, and other connection manners may be implemented by matching these components. Wherein the tail drive 6 is coupled to the tail stock of the plough conveying part 36 via a flange assembly.
As can be seen from the above embodiments, the present invention has the following advantages:
the coal planer is double-chain traction, and the two ends of the machine head and the machine tail are adopted for driving, so that the technical problems that the height of the whole coal planer is increased and the requirement on the height of a working surface is increased along with the increase of the diameter of a single chain are thoroughly solved. In addition, the coal planer of the invention gets rid of the limitation of single-chain drive, thereby solving the technical problem of no-chain selection caused by the increase of single-machine power.
Therefore, with the introduction of double chain traction and the increase of single machine driving power, the output torque of the motor is increased, the coal quality and hardness of the plough head of the coal plough can be increased, the adaptability of the coal plough to hard coal is improved, and the application range of the coal plough is enlarged.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A coal plough, comprising: a coal plough conveying part (36), a plough head (4), a sliding frame (3) matched with the plough head (4), and a double endless chain (7); wherein,
one end of the coal plough conveying part (36) is provided with a machine head driving device (1) for driving the plough head, and the other end is provided with a machine tail driving device (6) for driving the plough head;
the planing head (4) is arranged on the sliding frame (3), and the planing head (4) and the sliding frame (3) are of an integral structure;
the double endless chains (7) comprise first endless chains and second endless chains, the first endless chains and the second endless chains are wound on the machine head driving device (1) and the machine tail driving device (6), and the planing heads (4) are driven to reciprocate along the sliding frame (3) through chain wheel assemblies (14) respectively.
2. The coal plough of claim 1, further comprising:
the machine head chain tightening device (2) is connected with a transition groove of the coal plough conveying part (36) so as to communicate the carriage (3) with the machine head driving device (1);
and the tail chain tensioning device (5) is connected with a transition groove of the coal plough conveying part (36) to communicate the carriage (3) with the tail driving device (6).
3. The coal plough according to claim 1 or 2, characterized in that the carriage (3) is provided with:
a first operating cavity (31) and a second operating cavity (32) for accommodating the first endless chain;
a third operation cavity (33) and a fourth operation cavity (34) for accommodating the second endless chain;
the first operation cavity (31), the second operation cavity (32), the third operation cavity (33) and the fourth operation cavity (34) are not communicated with each other.
4. The coal plough according to claim 1, characterized in that the nose drive (1) comprises: the device comprises a motor (11), a connecting cover (12), a speed reducer (13), a chain wheel assembly (14) and a flange assembly (15), wherein the parts are connected through bolts in sequence; wherein the machine head driving device (1) is connected with a machine head frame of the coal plough conveying part (36) through a flange assembly.
5. The coal plough according to claim 1, characterized in that the tail drive (6) comprises: the device comprises a motor (11), a connecting cover (12), a speed reducer (13), a chain wheel assembly (14) and a flange assembly (15), wherein the parts are connected through bolts in sequence; wherein the tail drive (6) is coupled to a tail carrier of the plough conveying part (36) via a flange assembly.
6. The coal plough according to claim 1, characterized in that the plough head (4) is in a sliding fit connection with the carriage (3).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363754.4A CN102900435B (en) | 2012-09-26 | 2012-09-26 | Coal plough |
| PCT/CN2012/085938 WO2014048030A1 (en) | 2012-09-26 | 2012-12-05 | Coal planer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210363754.4A CN102900435B (en) | 2012-09-26 | 2012-09-26 | Coal plough |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900435A CN102900435A (en) | 2013-01-30 |
| CN102900435B true CN102900435B (en) | 2015-10-28 |
Family
ID=47572892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210363754.4A Active CN102900435B (en) | 2012-09-26 | 2012-09-26 | Coal plough |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102900435B (en) |
| WO (1) | WO2014048030A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306673B (en) * | 2013-05-17 | 2015-10-14 | 中煤张家口煤矿机械有限责任公司 | Plane chain is in the coal plough of balladeur train side horizontal arrangement |
| CN103277096A (en) * | 2013-06-05 | 2013-09-04 | 三一重型装备有限公司 | Coal plough and connection device thereof |
| CN103321638B (en) * | 2013-06-26 | 2016-04-06 | 三一重型装备有限公司 | Coal plough |
| CN104265287A (en) * | 2014-07-26 | 2015-01-07 | 中煤张家口煤矿机械有限责任公司 | Coal plough and slide frame structure of coal plough |
| CN105863631B (en) * | 2016-05-18 | 2018-07-10 | 安徽理工大学 | A kind of reciprocal coal cutting path Pneumatic cleaning damping device of coal planer plough |
| CN107091088B (en) * | 2017-06-07 | 2019-05-14 | 中国矿业大学 | A kind of brill plane formula coalcutter planer head |
| CN109403968A (en) * | 2018-12-06 | 2019-03-01 | 贵州大学 | A kind of coal mine with illumination functions is with adopting plane device |
| CN113464134B (en) * | 2021-06-25 | 2024-05-14 | 华能煤炭技术研究有限公司 | Planing and transporting beam structure and cluster type coal mining unit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111489A (en) * | 1976-05-15 | 1978-09-05 | Gewerkschaft Eisenhutte Westfalia | Stacked mineral mining plows independently driven or coupled |
| DE3017353A1 (en) * | 1980-05-07 | 1981-11-12 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Mine mineral extracting plane machine - has roller guideway supporting deflected draw chain section, reducing wear |
| DE4025858C2 (en) * | 1990-08-16 | 2000-07-13 | Dbt Gmbh | Plane guide attached to the chute of a chain scraper conveyor on the discharge side |
| CN101832134A (en) * | 2010-05-24 | 2010-09-15 | 三一重型装备有限公司 | Coal planer and planing chain connecting device thereof |
| CN201761897U (en) * | 2010-08-20 | 2011-03-16 | 中煤张家口煤矿机械有限责任公司 | Scraper chain device for high-power ground scraper conveyor |
| CN102395756A (en) * | 2009-04-21 | 2012-03-28 | 布西鲁斯欧洲有限公司 | Mining plough for plough systems and plough system for inclined formation |
| CN202417442U (en) * | 2012-01-10 | 2012-09-05 | 袁新安 | Wide belt ultralong stroke twin-well pumping unit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU450885A1 (en) * | 1972-05-10 | 1974-11-25 | Strugovo installation | |
| SU443977A1 (en) * | 1972-10-30 | 1974-09-25 | Л.Н.Иатрич , А.Т.Рыбапкин | Strugovo installation |
| DE4407115C1 (en) * | 1994-03-04 | 1995-10-26 | Braun Ernst | Plane for hewing coal |
| DE102005020170B4 (en) * | 2005-04-28 | 2016-06-02 | Caterpillar Global Mining Europe Gmbh | Planing device and method for controlling a planing device |
| CN201103395Y (en) * | 2007-06-26 | 2008-08-20 | 罗甫梁 | Planning and conveying machine |
| CN201284650Y (en) * | 2008-10-15 | 2009-08-05 | 山东矿机集团股份有限公司 | Creeping baseboard chain hauled shearer |
| CN102108863B (en) * | 2010-12-31 | 2013-03-27 | 三一重型装备有限公司 | Coal plough rack assembly |
-
2012
- 2012-09-26 CN CN201210363754.4A patent/CN102900435B/en active Active
- 2012-12-05 WO PCT/CN2012/085938 patent/WO2014048030A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111489A (en) * | 1976-05-15 | 1978-09-05 | Gewerkschaft Eisenhutte Westfalia | Stacked mineral mining plows independently driven or coupled |
| DE3017353A1 (en) * | 1980-05-07 | 1981-11-12 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Mine mineral extracting plane machine - has roller guideway supporting deflected draw chain section, reducing wear |
| DE4025858C2 (en) * | 1990-08-16 | 2000-07-13 | Dbt Gmbh | Plane guide attached to the chute of a chain scraper conveyor on the discharge side |
| CN102395756A (en) * | 2009-04-21 | 2012-03-28 | 布西鲁斯欧洲有限公司 | Mining plough for plough systems and plough system for inclined formation |
| CN101832134A (en) * | 2010-05-24 | 2010-09-15 | 三一重型装备有限公司 | Coal planer and planing chain connecting device thereof |
| CN201761897U (en) * | 2010-08-20 | 2011-03-16 | 中煤张家口煤矿机械有限责任公司 | Scraper chain device for high-power ground scraper conveyor |
| CN202417442U (en) * | 2012-01-10 | 2012-09-05 | 袁新安 | Wide belt ultralong stroke twin-well pumping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014048030A1 (en) | 2014-04-03 |
| CN102900435A (en) | 2013-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102900435B (en) | Coal plough | |
| US10526028B2 (en) | Crawler track | |
| CN201507310U (en) | Digger traveling mechanism | |
| CN201284650Y (en) | Creeping baseboard chain hauled shearer | |
| CN204267029U (en) | A kind of for large-inclination-angle coal bed flitting | |
| UA105485C2 (en) | Drive transmission method in a longwall shearer loader | |
| CN104389526A (en) | Guide rail type propulsion mechanism | |
| CN201599055U (en) | Underground coal loading and conveying combined device | |
| CN103742133B (en) | Pick Chain conveyer slicing portion of drum shearer | |
| US9862546B2 (en) | Chain drive for link chains of mining conveyors or mining extraction machines | |
| CN103306673B (en) | Plane chain is in the coal plough of balladeur train side horizontal arrangement | |
| CN201835830U (en) | Planning and transporting machine | |
| CN102145696B (en) | Mine cableway conveyed by roller chain | |
| CN205837809U (en) | A kind of intermediate channel is with the drag conveyor of base plate chain road reinforcing device | |
| CN203756164U (en) | Cutting part for drum shearer adopting cutting pick chain transmission manner | |
| CN203925492U (en) | Thin and medium-thickness seam high bearing capacity walking wheel of coal cutter | |
| CN101082278A (en) | Scraper conveyer | |
| CN205441707U (en) | Novel scraper conveyor system of coal bunker | |
| CN204368898U (en) | Pipe chain conveyer carrier bar | |
| CN209324345U (en) | Integral die-forged 201mm pitch drag conveyor pin rail | |
| CN201777663U (en) | Combined type scraper conveyor | |
| CN214778568U (en) | Dumbbell pin limiting device for matching conveyor of chain traction coal mining machine | |
| CN203603902U (en) | Split heading machine body | |
| CN110668086A (en) | External scraper feeder of chain | |
| CN202228010U (en) | Feeding mechanism of drill rod of drilling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |