CN106351668B - Mechanical rock breaking device - Google Patents
Mechanical rock breaking device Download PDFInfo
- Publication number
- CN106351668B CN106351668B CN201610874005.6A CN201610874005A CN106351668B CN 106351668 B CN106351668 B CN 106351668B CN 201610874005 A CN201610874005 A CN 201610874005A CN 106351668 B CN106351668 B CN 106351668B
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- Prior art keywords
- sleeve
- rock
- rock breaking
- mechanical
- broken
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- 239000011435 rock Substances 0.000 title claims abstract description 187
- 238000012546 transfer Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 31
- 230000015572 biosynthetic process Effects 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 6
- 230000033001 locomotion Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1086—Drives or transmissions specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of mechanical rock breaking devices, mechanical rock breaking device includes broken rock unit, broken rock unit includes be slidably connected sleeve assembly and mechanical rock breaking component, the sleeve assembly that is slidably connected includes outer sleeve, inner sleeve, the flexible driving hydraulic cylinder of opposite with the inner sleeve sliding of driving outer sleeve, the bearing block that is connect by bearing with outer sleeve, mechanical rock breaking component with one end of inner sleeve or outer sleeve is removable is fixedly connected；Broken rock unit is connect at least provided with two sets and with a power input device, and mechanical rock breaking device is additionally provided with caterpillar chassis；Mechanical rock breaking device of the invention, the case where adapting to the frequent significant change of construction site formation hardness, soft rock can not only be broken, and hard rock and solid rock can be broken, mechanical rock breaking device is improved to the adaptability of tunnel rock, broken rock speed of application and construction efficiency are improved, and compact-sized, small in size, it is mobile flexible.
Description
It solemnly declares：
The present invention claims the priority of following patent application：
The applying date is on 07 30th, 2016, application No. is 201610625341.7, entitled " mechanical rock breaking devices "
Chinese invention patent application.
Technical field
The present invention relates to broken rock equipment technology fields, and in particular to a kind of mechanical rock breaking that broken rock is excavated for rock tunnel
Device.
Background technique
Rock tunnel tunneling construction, which excavates broken rock, to be had mechanical rock breaking and bores explosion rock two ways, mechanical excavation broken rock mode
Mainly have three ways, such as hobboing cutter roll broken rock and scraper blades scrape broken rock and pick cutting broken rock, broken rock machinery mainly have hobboing cutter TBM,
Scraper TBM and cantilevered longitudinal axis development machine, cantilevered horizontal axis development machine.Every kind of current broken rock is mechanical to be only configured with a kind of broken rock
The broken rock component of mode, and corresponding the broken formation hardness of the broken rock component of each broken rock mode, there is a zone of reasonableness,
Not to be to all rocks be all technically feasible, reasonable in economy；But in the rock of big cross section and extra-large cross-section long range
During stone constructing tunnel, rock lithology and hardness often change a lot or even the same section different parts
It is very big that lithology is possible to difference；So cannot to be all well adapted for construction site formation hardness often bright for current broken rock machinery
The actual conditions of aobvious variation；In addition, current technology is horizontal, with hard and following relatively soft in mechanically direct large area broken rock excavation
Rock have certain feasibility either on construction cost, or in speed of application, construction efficiency, still, with machine
Hard or more harder rock, especially solid rock in the direct large area broken rock excavation of tool, either on construction cost,
Or in speed of application, construction efficiency, do not have advantage, or even technically not feasible；Besides current TBM
Broken rock machine geometric dimension is all bigger, and transport, assembling and disassembling workload are very big, and manufacturing cost is very high, is not suitable with short distance completely
Constructing tunnel, be more not suitable with big cross section rock tunnel and extra-large cross-section rock tunnel tunneling construction " advanced mechanical rock breaking is opened
Dig that short distance is small to lead cave+brill explosive expansion and scrape out lane " construction technology.It is " super for this purpose, being highly desirable to research and develop novel broken rock machinery
Preceding mechanical rock breaking excavates that short distance is small to lead cave+brill explosive expansion and scrape out lane " construction technology it is mating, in rock tunnel construction, open in advance
Dig short distance light section and lead cave, dig and create favorable conditions for subsequent large area brill explosion rock --- form the explosion of blasting rock-broken certainly
By face.
Summary of the invention
In view of this, the technical problem to be solved by the present invention is to：A kind of mechanical rock breaking device is provided, it is existing to adapt to construction
The case where formation hardness frequent significant change, mechanical rock breaking device is improved to the adaptability of tunnel rock, improves broken rock construction
Speed and construction efficiency.
In order to solve the above technical problems, the technical scheme is that：Mechanical rock breaking device, the mechanical rock breaking device packet
Broken rock unit is included, the broken rock unit includes：
Be slidably connected sleeve assembly, and the sleeve assembly that is slidably connected includes outer sleeve, in the insertion outer sleeve and institute
State inner sleeve that outer sleeve is slidably connected and for driving the outer sleeve sliding opposite with the inner sleeve flexible driving liquid
Cylinder pressure, the flexible driving hydraulic cylinder are set in the inner sleeve, one end of the flexible driving hydraulic cylinder and the inner sleeve
Connection, the other end of the flexible driving hydraulic cylinder are connect with the outer sleeve；It is set between the outer sleeve and the inner sleeve
It is equipped with torque transfer arrangement；
Mechanical rock breaking component, the mechanical rock breaking component are set to the end of the sleeve assembly that is slidably connected, the machine
Tool broken rock component with one end of the inner sleeve or outer sleeve is removable is fixedly connected.
When broken rock normal to tunnel using mechanical rock breaking device of the invention, because being provided with torsion between outer sleeve and inner sleeve
Square transferring structure can transmit torque, realize the rotary motion of mechanical rock breaking component, meanwhile, driving hydraulic cylinder of stretching is stretched out
Realize the axial feed motion of mechanical rock breaking component, the compound motion of rotary motion and axial feed motion realizes mechanical broken
The broken rock function of petrosa part；Tunnel formation hardness significant change situation is encountered as in when hard, harder or solid rock, due to machine
Tool broken rock component and one end of inner sleeve or outer sleeve be it is removable be fixedly connected, former mechanical rock breaking component is dismantled, is changed
The mechanical rock breaking component for meeting formation hardness requirement, can continue broken rock construction operation, it is ensured that broken rock speed of application and construction
Efficiency.
The following are in place of the multinomial Optimal improvements to mechanical rock breaking device of the invention：
Wherein, the inner wall of the outer sleeve is equipped with internal spline, and the outer wall of the inner sleeve is equipped with external splines, the internal spline
It connect to form the torque transfer arrangement with the external splines；Alternatively, the inner wall of the outer sleeve is in inner polygon, the inner sleeve
The outer wall of cylinder is in outer polygon, and the inner polygon connect to form the torque transfer arrangement with the outer polygon.
Wherein, the broken rock unit further includes the bearing block of fixed setting, and the sleeve assembly that is slidably connected is sheathed on institute
It states in bearing block, is rotatablely connected between the outer sleeve and the bearing block by bearing.The sleeve assembly that is slidably connected is constrained in
In bearing block, so as to which the sleeve assembly that is slidably connected with rotating function is fixed with chassis installation by bearing block.
Wherein, the mechanical rock breaking component is rotary drill or impact drill.By selection rotary drill or impact drill, can satisfy
The requirement of broken different hardness rock.
Wherein, the broken rock unit is provided at least two, and at least two broken rock units and a power input fill
Transmission connection is set, the power input device has at least two power output ends, each power output end and corresponding one
The inner sleeve or outer sleeve of a broken rock unit are sequentially connected.At least two broken rock units are integrated in a mechanical rock breaking device
On, broken rock speed and efficiency of breaking rock are greatly improved, and compact-sized, small in size, it is mobile flexible.
Wherein, the mechanical rock breaking device is additionally provided with caterpillar chassis, is provided with connection frame on the caterpillar chassis,
Axis direction setting and support of the broken rock unit along the caterpillar chassis are on the connection frame.Broken rock unit support exists
On connection frame, avoid improving the stability of device in hanging wall construction；Caterpillar chassis is for carrying and whole device being driven to move
Dynamic, walking.
Wherein, stable support structure, one end of the stable support structure and institute are additionally provided on the caterpillar chassis
Caterpillar chassis connection is stated, the other end of the stable support structure is directed toward the outside of the caterpillar chassis.To tunnel broken rock
When construction, the rock reaction force that mechanical rock breaking component is subject to is very big, and entire mechanical rock breaking device has the tendency that retrogressing, due to setting
It is equipped with stable support structure, the other end of stable support structure can abut against tunnel roof or side wall, to improve machinery
The stability of broken rock device.
Wherein, the stable support structure include the small sleeve being set-located and big sleeve and one end with it is described small
The telescopic hydraulic cylinder of the sleeve connection other end and the big sleeve connection, the big sleeve are connect with the caterpillar chassis.
In conclusion mechanical rock breaking device of the invention adapts to construction site rock after using above-mentioned technical proposal
The case where hardness frequent significant change, soft rock can not only be broken, and hard rock and solid rock can be broken, improve mechanical rock breaking
Device improves broken rock speed of application and construction efficiency to the adaptability of tunnel rock, and compact-sized, small in size, mobile spirit
It is living.
Detailed description of the invention
Fig. 1 is the mechanical rock breaking apparatus structure schematic diagram (broken section) of the embodiment of the present invention；
Fig. 2 is K in Fig. 1 to enlarged view；
Fig. 3 is a kind of torque transfer arrangement schematic diagram；
Fig. 4 is another torque transfer arrangement schematic diagram；
In figure：1- mechanical rock breaking component；2- bearing block；3- outer sleeve；4- inner sleeve；5- stretches driving hydraulic cylinder；6- connects
Connect frame；7- stable support structure；8- bearing；9- power input device；10- caterpillar chassis.
Specific embodiment
Unrestricted detailed description is made to a specific embodiment of the invention with reference to the accompanying drawing.
For ease of description, mechanical rock breaking component broken rock drilling direction is defined as " preceding ", the direction definition opposite with " preceding "
For " rear ".
It, can be with it should also be noted that term " connection " described herein, " installation ", " connected " etc., shall be understood in a broad sense
It is to be connected directly between two elements, can also indirectly connected through an intermediary, to those skilled in the art, Ke Yigen
The concrete meaning of such term is understood according to concrete condition.
As shown in Figure 1, mechanical rock breaking device includes broken rock unit, broken rock unit includes be slidably connected sleeve assembly and machinery
Broken rock component.Wherein, the sleeve assembly that is slidably connected include outer sleeve 3, insertion outer sleeve 3 in be slidably connected with outer sleeve 3 it is interior
Sleeve 4, the flexible driving hydraulic cylinder 5 for driving outer sleeve 3 and the opposite sliding of inner sleeve 4, to reduce occupied space, making structure
More compact, driving hydraulic cylinder 5 of stretching is set in inner sleeve 4, and one end of flexible driving hydraulic cylinder 5 is connect with inner sleeve 4, is stretched and is driven
The other end of hydrodynamic cylinder pressure 5 is connect with outer sleeve 3；Torque transfer arrangement is provided between outer sleeve 3 and inner sleeve 4.Wherein,
Mechanical rock breaking component 1 is set to the end for the sleeve assembly that is slidably connected, mechanical rock breaking component 1 and inner sleeve 4 or outer sleeve 3
One end is removable to be fixedly connected.Preferred embodiment is as shown in Figure 1, mechanical rock breaking component 1 is threadedly coupled with inner sleeve 4；Certainly, may be used
To be that mechanical rock breaking component 1 is connect with outer sleeve 3, removable be fixedly connected can also be connected by screw bolts or the sides such as pin shaft connection
Formula.Wherein, rotary drill or impact drill may be selected in mechanical rock breaking component 1, by selection rotary drill or impact drill, can satisfy brokenly not
With the requirement of hardness rock.
Wherein, in order to cool down when broken rock is constructed to the mechanical rock breaking component 1 to run at high speed, mechanical rock breaking device is also
It is provided with coolant liquid delivery pipe, which passes through the cylinder body and piston of flexible driving hydraulic cylinder 5, with flexible driving liquid
The piston rod hollow cavity connection (in figure specific signal) of cylinder pressure, coolant liquid can go directly mechanical rock breaking component 1 it is carried out it is cold
But cool down.
Wherein, above-mentioned torque transfer arrangement preferably uses following two：As shown in figure 3, in the inner wall of outer sleeve 3 is equipped with
Spline is equipped with external splines in the outer wall of inner sleeve 4, and internal spline connect to form torque transfer arrangement with external splines.Alternatively, such as Fig. 4
Shown, the inner wall of outer sleeve 3 is in inner polygon, and the outer wall of inner sleeve 4 is in outer polygon, and inner polygon connect shape with outer polygon
At torque transfer arrangement.
Wherein, broken rock unit further includes the bearing block 2 of fixed setting, and the sleeve assembly that is slidably connected is sheathed in bearing block 2,
It is rotatablely connected between outer sleeve 3 and bearing block 2 by bearing 8.The sleeve assembly that is slidably connected is constrained in bearing block 2, passes through axis
Seat 2 is held by be slidably connected sleeve assembly and chassis installation fixation with rotating function.
Wherein, in order to improve broken rock speed and efficiency of breaking rock, for above-mentioned broken rock unit at least provided with two, all is broken
Rock unit is connect with a power input device 9, and power input device 9 has at least two power output ends, each power
Output end is sequentially connected with the inner sleeve 4 of a corresponding broken rock unit or outer sleeve 3, and transfer can be used in power input device 9
Case.As shown in Fig. 2, the mechanical rock breaking device of the present embodiment is provided with three broken rock units, and certainly, the quantity of broken rock unit not office
It is limited to two, three, can also increased according to actual needs.At least two broken rock units are integrated in a mechanical rock breaking
On device, broken rock speed and efficiency of breaking rock are not only increased, and compact-sized, small in size, it is mobile flexible.
Wherein, mechanical rock breaking device is additionally provided with caterpillar chassis 10, and caterpillar chassis 10 is entire for carrying and driving
Device is mobile, walks；Connection frame 6, axis of all broken rock units along caterpillar chassis 10 are provided on caterpillar chassis 10
Simultaneously support avoids broken rock unit in hanging wall construction, improves the stability of device the setting of line direction on connection frame 6.
Wherein, stable support structure 7, one end of stable support structure 7 and crawler belt are additionally provided on caterpillar chassis 10
Formula chassis 10 connects, and the other end of stable support structure 7 is directed toward the outside of caterpillar chassis 10.When to the construction of tunnel broken rock, by
Very big in the rock reaction force that mechanical rock breaking component 1 is subject to, entire mechanical rock breaking device has the tendency that retrogressing, is provided with and stablizes
After support construction 7, the other end of stable support structure 7 abuts against tunnel roof or side wall, to improve mechanical rock breaking device
Stability.Optimal setting is that the other end of stable support structure 7 tilts backwards setting, which is inclined by from tunnel
Caterpillar chassis can be pressed to tunnel floor and prevent whole device from retreating by active force diagonally forward.
Wherein, the specific structure of aforementioned stable support construction 7 can be：Including the small sleeve and big set being set-located
Cylinder and one end connect the telescopic hydraulic cylinder of the other end Yu big sleeve connection with small sleeve, and big sleeve is connect with caterpillar chassis
(not specific signal in figure)；It can also be other stable support structures commonly employed in the art.
As shown in Figure 1, being connect with mechanical rock breaking component 1 with inner sleeve 4, outer sleeve 3 and power input device 9 are sequentially connected
For, the mechanical rock breaking device course of work of the invention is as follows：
When broken rock normal to tunnel, power input device 9 imparts power to outer sleeve 3, by torque transfer arrangement, outside
Sleeve 3 transfers torque to inner sleeve 4, realizes the rotary motion of mechanical rock breaking component 1；Meanwhile flexible driving hydraulic cylinder 5 is stretched out,
Inner sleeve 4 slides along outer sleeve 3 and mechanical rock breaking component 1 is driven to travel forward, and realizes the axial feed of mechanical rock breaking component 1
The compound motion of movement, rotary motion and axial feed motion realizes the broken rock function of mechanical rock breaking component 1.Encounter tunnel rock
Stone hardness significant change situation, as in when hard, harder or solid rock, due to one end of mechanical rock breaking component 1 and inner sleeve 4
Be it is removable be fixedly connected, therefore, it is possible to quickly and easily dismantle former mechanical rock breaking component, change and meet formation hardness and want
The mechanical rock breaking component asked, can continue broken rock construction operation, it is ensured that broken rock speed of application and construction efficiency.
In order to improve working efficiency, quick-fried rock breaking efficiency is bored to improve, is also provided with simultaneously on the mechanical rock breaking device
One or multi-section construction blasting drilling drilling machine.
In conclusion mechanical rock breaking device of the invention, adapts to the feelings of the frequent significant change of construction site formation hardness
Condition can not only break soft rock, and can break hard rock and solid rock, improve adaptation of the mechanical rock breaking device to tunnel rock
Property, broken rock speed of application and construction efficiency are improved, and compact-sized, small in size, it is mobile flexible；It is particularly suitable as " advanced
Mechanical rock breaking excavates that short distance is small to lead cave+brill explosive expansion and scrape out lane " relevant equipment of construction technology.
Claims (8)
1. mechanical rock breaking device, the mechanical rock breaking device include：Broken rock unit, the broken rock unit include the sleeve that is slidably connected
Component and mechanical rock breaking component, the sleeve assembly that is slidably connected include outer sleeve, are inserted into the outer sleeve and the housing
The inner sleeve that is slidably connected of cylinder and for driving the outer sleeve sliding opposite with the inner sleeve flexible driving hydraulic cylinder,
It is characterized in that,
The flexible driving hydraulic cylinder is set in the inner sleeve, and one end of the flexible driving hydraulic cylinder and the inner sleeve connect
It connects, the other end of the flexible driving hydraulic cylinder is connect with the outer sleeve；It is arranged between the outer sleeve and the inner sleeve
There is torque transfer arrangement；
The mechanical rock breaking component is set to the end of the sleeve assembly that is slidably connected, the mechanical rock breaking component with it is described interior
One end of sleeve or outer sleeve is removable to be fixedly connected.
2. mechanical rock breaking device as described in claim 1, which is characterized in that the inner wall of the outer sleeve is equipped with internal spline, institute
The outer wall for stating inner sleeve is equipped with external splines, and the internal spline connect to form the torque transfer arrangement with the external splines；Alternatively,
The inner wall of the outer sleeve is in inner polygon, and the outer wall of the inner sleeve is in outer polygon, the inner polygon and described outer more
Side shape connects to form the torque transfer arrangement.
3. mechanical rock breaking device as claimed in claim 2, which is characterized in that the broken rock unit further includes the axis of fixed setting
Seat is held, the sleeve assembly that is slidably connected is sheathed in the bearing block, passes through axis between the outer sleeve and the bearing block
Hold rotation connection.
4. mechanical rock breaking device as described in claim 1, which is characterized in that the mechanical rock breaking component is rotary drill or impact
It bores.
5. such as the described in any item mechanical rock breaking devices of Claims 1-4, which is characterized in that the broken rock unit be provided with to
Two few, at least two broken rock units and a power input device are sequentially connected, and the power input device has extremely
Few two power output ends, each power output end and the inner sleeve of corresponding one broken rock unit or outer sleeve transmission
Connection.
6. mechanical rock breaking device as claimed in claim 5, which is characterized in that the mechanical rock breaking device is additionally provided with crawler type
Chassis, connection frame is provided on the caterpillar chassis, and the broken rock unit is arranged along the axis direction of the caterpillar chassis
And support is on the connection frame.
7. mechanical rock breaking device as claimed in claim 6, which is characterized in that be additionally provided on the caterpillar chassis and stablize branch
Support structure, one end of the stable support structure are connect with the caterpillar chassis, and the other end of the stable support structure refers to
To the outside of the caterpillar chassis.
8. mechanical rock breaking device as claimed in claim 7, which is characterized in that the stable support structure includes being set-located
Small sleeve and big sleeve and one end the telescopic hydraulic cylinder of the other end Yu the big sleeve connection is connect with the small sleeve,
The big sleeve is connect with the caterpillar chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/325,115 US11371854B2 (en) | 2016-09-30 | 2017-05-16 | Method and apparatus for processing transit time of navigation path, device and computer storage medium |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625341.7A CN106014436A (en) | 2016-07-30 | 2016-07-30 | Mechanical rock breaker |
| CN2016106253417 | 2016-07-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106351668A CN106351668A (en) | 2017-01-25 |
| CN106351668B true CN106351668B (en) | 2018-11-27 |
Family
ID=57134229
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610625341.7A Withdrawn CN106014436A (en) | 2016-07-30 | 2016-07-30 | Mechanical rock breaker |
| CN201610874005.6A Active CN106351668B (en) | 2016-07-30 | 2016-09-30 | Mechanical rock breaking device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610625341.7A Withdrawn CN106014436A (en) | 2016-07-30 | 2016-07-30 | Mechanical rock breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106014436A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678765A (en) * | 2018-05-14 | 2018-10-19 | 贵州大学 | A kind of tunnel excavating gear facilitating rubble |
| CN109057791B (en) * | 2018-08-08 | 2019-11-29 | 安徽普华灵动机器人科技有限公司 | A kind of robot for the dangerous small wide open use of mine of coal mine |
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2016
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| CN202768009U (en) * | 2012-08-01 | 2013-03-06 | 湖北天地重工有限公司 | Novel copy cutter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106014436A (en) | 2016-10-12 |
| CN106351668A (en) | 2017-01-25 |
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