CN107605521B - Support top hydraulic shield support - Google Patents
Support top hydraulic shield support Download PDFInfo
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- CN107605521B CN107605521B CN201710719281.XA CN201710719281A CN107605521B CN 107605521 B CN107605521 B CN 107605521B CN 201710719281 A CN201710719281 A CN 201710719281A CN 107605521 B CN107605521 B CN 107605521B
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- 239000003245 coal Substances 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 230000008859 change Effects 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 6
- 238000005065 mining Methods 0.000 description 13
- 239000011435 rock Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Excavating Of Shafts Or Tunnels (AREA)
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Abstract
The present invention provides a kind of support top hydraulic shield supports, it includes pedestal etc., first main hydraulic cylinder, the second main hydraulic cylinder, secondary hydraulic cylinder and double parallel quadrangular mechanism are installed on pedestal, first main hydraulic cylinder, the second main hydraulic cylinder and secondary hydraulic cylinder are respectively intended to supporting top beam and are double parallel quadrangular mechanism and provide power, the top beam is made of upper mounting plate and lower platform two parts, is linked between upper mounting plate and lower platform by flexible hinge；The double parallel quadrangular mechanism is made of two connected parallelogram struts, multiple high-precision force distribution detection sensors are evenly distributed on the surface of top beam and caving shield, the distribution of the power of each point on real-time measurement surface, guarantee real-time monitors the variation of power at each point, to cope with the emergency situations that coal seam occurs in time.Structure of the invention design is very simple, not only can guarantee that top beam was in horizontality always, but also can real-time monitor the variation of power at each point.
Description
Technical field
The present invention relates to coal mining control technology fields, and in particular, to a kind of support top hydraulic shield support.
Background technique
Hydraulic support is mainly used for horizontal plane and the gently inclined thick coal seam less than or equal to 10 degree is adopted along Sub-Level Caving of bottom plate
The longwall full-mechanized mining technique working face of full-dimension mining is also applied for severe inclined thick coal seam horizontal slice caving fully mechanized face.It is hydraulic
Bracket is to realize the movements such as lifting, Forward, the equipment for carrying out roof timbering with hydraulic for power.It is coal mine fully-mechanized mining
Key equipment, be Modern coal mines realize mine, the important link of transport and all process steps full mechanization such as supporting, to the modern times
Coal production is significant.Hydraulic cylinder is the key element that various movements and carrying roof pressure are completed when hydraulic support work,
Its quality directly affects the reliability of hydraulic support, and then influences the safety and normal production of coal mine.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of support top hydraulic shield supports, improve
Efficiency with coal mining and transporting equipment is improved, mitigates the labor intensity of coal miner, ensures the life of coal miner to greatest extent
Safety.
According to an aspect of the present invention, a kind of support top hydraulic shield support is provided, which is characterized in that the support top is covered
Shield formula hydraulic support includes pedestal, secondary hydraulic cylinder, first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod, the
Six-bar linkage, seven-link assembly, the 8th connecting rod, caving shield, lower platform, upper mounting plate, high-precision force are distributed detection sensor, single-degree-of-freedom
Telescopic displacement sensor, the first main hydraulic cylinder, the second main hydraulic cylinder are equipped with the first main hydraulic cylinder, the second main liquid on pedestal
Cylinder pressure, secondary hydraulic cylinder and double parallel quadrangular mechanism, the first main hydraulic cylinder, the second main hydraulic cylinder and secondary hydraulic cylinder are respectively intended to
Supporting top beam and double parallel quadrangular mechanism and to provide power, the top beam is made of upper mounting plate and lower platform two parts, on
It is linked between platform and lower platform by flexible hinge；The double parallel quadrangular mechanism is by two connected parallelogram branch
Bar composition, double parallel quadrangular mechanism are connected by pedestal, first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th respectively
Bar, six-bar linkage, seven-link assembly, the 8th connecting rod, lower platform and caving shield form, wherein pedestal, lower platform and caving shield
Regard a link mechanism of double parallel quadrangular mechanism as respectively；The telescopic displacement sensor of single-degree-of-freedom is according to flexible hinge
Micro-displacement variation comes the spatial position of local directed complete set top beam；Multiple high-precision force distribution detection sensors are evenly distributed in top beam
On the surface of caving shield, the distribution of the power of each point on real-time measurement surface guarantees the variation for real-time monitoring power at each point, with
Just the emergency situations that reply coal seam occurs in time.
Preferably, first main hydraulic cylinder includes the first cylinder body of main hydraulic cylinder and the First piston bar of main hydraulic cylinder,
Second main hydraulic cylinder includes the second cylinder body of main hydraulic cylinder and the second piston bar of main hydraulic cylinder, the First piston bar of main hydraulic cylinder
One end, main hydraulic cylinder one end of second piston bar all connect with lower platform, the other end of the First piston bar of main hydraulic cylinder
It is connect with the first cylinder body of main hydraulic cylinder, the other end of the second piston bar of main hydraulic cylinder all connects with the second cylinder body of main hydraulic cylinder
It connects, the bottom end of the first cylinder body of main hydraulic cylinder, the bottom end of the second cylinder body of main hydraulic cylinder are all connect with pedestal.
Preferably, the secondary hydraulic cylinder includes secondary hydraulic cylinder body, secondary hydraulic cylinder second piston rod and secondary hydraulic cylinder level-one
Piston rod, secondary hydraulic cylinder body, secondary hydraulic cylinder second piston rod and secondary hydraulic cylinder first stage piston bar are sequentially connected from the bottom up.
Preferably, the double parallel quadrangular mechanism guarantee main hydraulic cylinder, secondary hydraulic cylinder driving under, top beam is protected always
It holds in horizontality；Independent control main hydraulic cylinder, secondary hydraulic cylinder, and then realize and control double parallel quadrangular mechanism respectively, adjustment
Spatial position of the top beam under dangerous coal seam.
Preferably, the flexible hinge guarantees that the pressure in coal seam suffered by top beam upper mounting plate concentrates on the center of top beam,
In the supporting point effective range of main hydraulic cylinder, it is effectively prevented from the equipment rollover of support top hydraulic shield support, improves equipment
The safety coefficient of service life and coal seam.
Preferably, the telescopic displacement sensor of the single-degree-of-freedom measures the relative displacement variation of lower platform on top beam, root
Change in displacement accordingly, so that support top hydraulic shield support equipment adjusts front-rear position in real time.
Preferably, the quantity of the support top hydraulic shield support is more, wherein a support top hydraulic shield support
When needing to adjust position, remaining support top hydraulic shield support can play the role of supporting coal seam.
Compared with prior art, the present invention is with following the utility model has the advantages that support top hydraulic shield support of the present invention is to use
To control the works of coal working face mine pressure.The form carried other than face mine pressure is adopted to act on hydraulic support.Hydraulic
It bracket and adopts in the mechanical system of face country rock interaction, if each supporting member resultant force of hydraulic support with top plate acts on hydraulic branch
Outer load resultant force just same straight line on frame, then the hydraulic support is adopted face country rock to this and is extremely adapted to.Hydraulic support is that fully mechanized mining is set
Standby important component.It reliably and efficiently can support and control the top plate of working face, and goaf is isolated, prevent spoil into
Enter stope and promotes conveyer.It is used in conjunction with shearer, and realizes coal mining comprehensive mechanization, solves mechanical coal mining
Roof control lags behind the contradiction of coal work in work, further improves the efficiency of coal mining and transporting equipment, mitigates
The labor intensity of coal miner ensures the life security of coal miner to greatest extent.Support top hydraulic shield support knot of the present invention
Structure design is very simple, not only can guarantee that top beam was in horizontality always, but also can real-time monitor the variation of power at each point, with
And coal seam pressure suffered by top beam is concentrated on to the center position of top beam, guarantee that each supporting member resultant force is acted on top beam as far as possible
Outer load resultant force just same straight line on hydraulic support, so that support top hydraulic shield support equipment adopts face country rock to this very
It adapts to.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is that the support top hydraulic shield support in one embodiment of the invention equips overall structure diagram；
Fig. 2 is that the support top hydraulic shield support in one embodiment of the invention equips schematic top plan view.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
As depicted in figs. 1 and 2, support top hydraulic shield support of the present invention include pedestal 1, secondary hydraulic cylinder 6, first connecting rod 7,
Second connecting rod 8, fourth link 10, the 5th connecting rod 11, six-bar linkage 12, seven-link assembly 13, the 8th connecting rod 14, is covered third connecting rod 9
Guard beam 16, lower platform 17, upper mounting plate 18, high-precision force distribution detection sensor 19, the telescopic displacement sensor 20 of single-degree-of-freedom,
First main hydraulic cylinder 24, the second main hydraulic cylinder 25 are equipped with the first main hydraulic cylinder 24, the second main hydraulic cylinder 25, secondary liquid on pedestal 1
Cylinder pressure 6 and double parallel quadrangular mechanism, the first main hydraulic cylinder 24, the second main hydraulic cylinder 25 and secondary hydraulic cylinder 6 are respectively intended to prop up
Support beam and double parallel quadrangular mechanism and to provide power, the top beam is made of upper mounting plate 18 and 17 two parts of lower platform,
It is linked between upper mounting plate 18 and lower platform 17 by flexible hinge；The double parallel quadrangular mechanism is by two connected parallel four
Side shape strut composition, double parallel quadrangular mechanism are connected by pedestal 1, first connecting rod 7, second connecting rod 8, third connecting rod the 9, the 4th respectively
Bar 10, the 5th connecting rod 11, six-bar linkage 12, seven-link assembly 13, the 8th connecting rod 14, lower platform 17 and caving shield 16 form,
Middle pedestal 1, lower platform 17 and caving shield 16 can regard a link mechanism of double parallel quadrangular mechanism as respectively；It is single free
Spending telescopic displacement sensor 20 can change according to the micro-displacement of flexible hinge come the spatial position of local directed complete set top beam；It is more
A high-precision force distribution detection sensor 19 is evenly distributed on the surface of top beam and caving shield, can be with each on real-time measurement surface
The distribution of the power of point, it is ensured that the variation of power at each point is real-time monitored, to cope with the burst shape that coal seam occurs in time
Condition.
First main hydraulic cylinder 24 includes the first cylinder body 2 of main hydraulic cylinder and the First piston bar 22 of main hydraulic cylinder, and second is main
Hydraulic cylinder 25 includes the second cylinder body 23 of main hydraulic cylinder and the second piston bar 21 of main hydraulic cylinder, the First piston bar of main hydraulic cylinder
22 one end, main hydraulic cylinder one end of second piston bar 21 all connect with lower platform 17, the First piston bar 22 of main hydraulic cylinder
The other end and main hydraulic cylinder the first cylinder body 2 connect, the other end of the second piston bar 21 of main hydraulic cylinder all with main hydraulic cylinder
The connection of the second cylinder body 23, the bottom end of the first cylinder body 2 of main hydraulic cylinder, the second cylinder body 23 of main hydraulic cylinder bottom end all with pedestal
1 connection, it is easy to use in this way, facilitate adjustment top beam.
Secondary hydraulic cylinder 6 includes secondary hydraulic cylinder body 3, secondary hydraulic cylinder second piston rod 4 and secondary hydraulic cylinder first stage piston bar 5,
Secondary hydraulic cylinder body 3, secondary hydraulic cylinder second piston rod 4 and secondary hydraulic cylinder first stage piston bar 5 are sequentially connected from the bottom up, are tied in this way
Structure is simple, is easy to use.
The double parallel quadrangular mechanism guarantee main hydraulic cylinder, secondary hydraulic cylinder driving under, top beam remains at water
Level state；Independent control main hydraulic cylinder, secondary hydraulic cylinder, and then realize and control double parallel quadrangular mechanism respectively, adjustment top beam exists
Spatial position under dangerous coal seam.
The telescopic displacement sensor of single-degree-of-freedom can measure the relative displacement variation of lower platform on top beam, according to this
Change in displacement, so that support top hydraulic shield support equipment adjusts front-rear position in real time.
Flexible hinge can guarantee that the pressure in coal seam suffered by the upper mounting plate 18 of top beam concentrates on the center of top beam, i.e.,
One main hydraulic cylinder 24, the second main hydraulic cylinder 25 supporting point effective range in, be effectively prevented from support top hydraulic shield support dress
Standby rollover, improves the service life of equipment and the safety coefficient in coal seam.Double parallel quadrangular mechanism can guarantee main first
Hydraulic cylinder 24, the second main hydraulic cylinder 25, secondary hydraulic cylinder 6 driving under, top beam remains at horizontality.Furthermore, it is possible to solely
The first main hydraulic cylinder 24 of vertical control, the second main hydraulic cylinder 25, secondary hydraulic cylinder 6, and then realize and control double parallel quadrangle machine respectively
Structure adjusts spatial position of the top beam under dangerous coal seam.The telescopic displacement sensor 15 of single-degree-of-freedom can measure top beam or more
The relative displacement of platform changes, according to this change in displacement, so that support top hydraulic shield support equipment adjusts front-rear position in real time.
The effect of support top hydraulic shield support equipment of the present invention is the excavated space when the work of other unmanned excavating equipments
Can constantly it expand, the uniformly distributed high-precision force distribution detection sensor 19 being mounted on top beam can measure the power of each point on top beam in real time
Distribution；Measured power can be designed by the flexible hinge on top beam and concentrate on the center stressed position of top beam, according to force feedback,
The position of support top hydraulic shield support equipment meeting adjust automatically support top hydraulic shield support equipment, advances or retreats, and
And due to the design of double parallel quadrangular mechanism so that top beam is in a horizontal position always, and the design of flexible hinge is but also top
Beam can carry out small-scale adjust automatically according to the case where support coal surface, increase the contact of top beam with support coal surface
Area；More support top hydraulic shield support co-ordinations can greatly improve the safety of working efficiency and dangerous coal seam
Coefficient avoids caving in, and causes immeasurable loss.Structure of the invention design is very simple, both can guarantee that top beam was in always
Horizontality, and the variation of power at each point can be real-time monitored.
Support top hydraulic shield support of the present invention is the works for controlling coal working face mine pressure.Adopt face mine pressure
The form carried in addition acts on hydraulic support.It in hydraulic support and adopts in the mechanical system that face country rock interacts, if hydraulic
Each supporting member resultant force and the top plate of bracket act on the resultant force of the outer load on hydraulic support just same straight line, then the hydraulic support pair
This adopts face country rock and extremely adapts to.Hydraulic support is the important component of fully-mechanized mining equipment.It reliably and efficiently can support and control
Goaf is isolated in the top plate of working face processed, prevents spoil from entering stope and promotes conveyer.It with coalcutter is mating makes
With realization coal mining comprehensive mechanization solves the contradiction that roof control in mechanical coal mining work lags behind coal work, further
The efficiency for improving coal mining and transporting equipment mitigates the labor intensity of coal miner, ensures coal miner to greatest extent
Life security.Support top hydraulic shield support structure design of the present invention is very simple, both can guarantee that top beam was in horizontal always
State, and the variation of power at each point can be real-time monitored, and coal seam pressure suffered by top beam is concentrated on to the center of top beam
Place guarantees that each supporting member resultant force and top beam act on the just same straight line of the outer load resultant force on hydraulic support, so that should as far as possible
Support top hydraulic shield support equipment is adopted face country rock to this and is extremely adapted to.More support top hydraulic shield support equipments coordinate work
Make, when a support top hydraulic shield support equipment needs to adjust position wherein, remaining support top hydraulic shield support equipment
It can play the role of supporting coal seam, working efficiency is very high, and safety is also very high.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring substantive content of the invention.
Claims (7)
1. a kind of support top hydraulic shield support, which is characterized in that the support top hydraulic shield support includes pedestal, secondary hydraulic
Cylinder, second connecting rod, third connecting rod, fourth link, the 5th connecting rod, six-bar linkage, seven-link assembly, the 8th connecting rod, is covered first connecting rod
Guard beam, lower platform, upper mounting plate, high-precision force distribution detection sensor, the telescopic displacement sensor of single-degree-of-freedom, the first master are hydraulic
Cylinder, the second main hydraulic cylinder are equipped with the first main hydraulic cylinder, the second main hydraulic cylinder, secondary hydraulic cylinder and four side of double parallel on pedestal
Shape mechanism, the first main hydraulic cylinder, the second main hydraulic cylinder and secondary hydraulic cylinder are respectively intended to supporting top beam and are double parallel quadrangle machine
Structure simultaneously provides power, and the top beam is made of upper mounting plate and lower platform two parts, passes through flexible hinge between upper mounting plate and lower platform
Chain link；The double parallel quadrangular mechanism is made of two connected parallelogram struts, double parallel quadrangular mechanism point
Not by pedestal, first connecting rod, second connecting rod, third connecting rod, fourth link, the 5th connecting rod, six-bar linkage, seven-link assembly, the 8th
Connecting rod, lower platform and caving shield composition, wherein pedestal, lower platform and caving shield regard double parallel quadrangular mechanism as respectively
One link mechanism；The micro-displacement variation of the telescopic displacement sensor monitoring flexible hinge of single-degree-of-freedom；Multiple high-precision forces
Distribution detection sensor is evenly distributed on the surface of top beam and caving shield, and the distribution of the power of each point on real-time measurement surface is protected
Card real-time monitors the variation of power at each point, to cope with the emergency situations that coal seam occurs in time.
2. support top hydraulic shield support according to claim 1, which is characterized in that first main hydraulic cylinder includes the
First cylinder body of one main hydraulic cylinder and the First piston bar of the first main hydraulic cylinder, the second main hydraulic cylinder include the second main hydraulic cylinder
The second piston bar of second cylinder body and the second main hydraulic cylinder, one end of the First piston bar of the first main hydraulic cylinder, the second master are hydraulic
One end of the second piston bar of cylinder is all connect with lower platform, the other end of the First piston bar of the first main hydraulic cylinder and the first main liquid
First cylinder body of cylinder pressure connects, and the second cylinder body of the other end of the second piston bar of the second main hydraulic cylinder and the second main hydraulic cylinder connects
It connects, the bottom end of the first cylinder body of the first main hydraulic cylinder, the bottom end of the second cylinder body of the second main hydraulic cylinder are all connect with pedestal.
3. support top hydraulic shield support according to claim 1, which is characterized in that the pair hydraulic cylinder includes secondary hydraulic
Cylinder cylinder body, secondary hydraulic cylinder second piston rod and secondary hydraulic cylinder first stage piston bar, secondary hydraulic cylinder body, secondary hydraulic cylinder second piston rod
It is sequentially connected from the bottom up with secondary hydraulic cylinder first stage piston bar.
4. support top hydraulic shield support according to claim 1, which is characterized in that the double parallel quadrangular mechanism is protected
Demonstrate,prove main hydraulic cylinder, secondary hydraulic cylinder driving under, top beam remains at horizontality；Independent control main hydraulic cylinder, pair are hydraulic
Cylinder, and then realize and control double parallel quadrangular mechanism respectively, adjust spatial position of the top beam under dangerous coal seam.
5. support top hydraulic shield support according to claim 1, which is characterized in that the flexible hinge guarantees on top beam
The pressure in coal seam suffered by platform concentrates on the center of top beam, in the supporting point effective range of main hydraulic cylinder, is effectively prevented from
The equipment rollover of support top hydraulic shield support, improves the service life of equipment and the safety coefficient in coal seam.
6. support top hydraulic shield support according to claim 1, which is characterized in that the telescopic displacement of single-degree-of-freedom
Sensor measures the relative displacement variation of lower platform on top beam, according to this change in displacement, so that support top hydraulic shield support fills
Standby adjustment front-rear position in real time.
7. support top hydraulic shield support according to claim 1, which is characterized in that the support top hydraulic shield support
Quantity be more, wherein when a support top hydraulic shield support needs to adjust position, remaining support top hydraulic shield support
It can play the role of supporting coal seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719281.XA CN107605521B (en) | 2017-08-21 | 2017-08-21 | Support top hydraulic shield support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719281.XA CN107605521B (en) | 2017-08-21 | 2017-08-21 | Support top hydraulic shield support |
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| Publication Number | Publication Date |
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| CN107605521A CN107605521A (en) | 2018-01-19 |
| CN107605521B true CN107605521B (en) | 2019-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710719281.XA Active CN107605521B (en) | 2017-08-21 | 2017-08-21 | Support top hydraulic shield support |
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| Country | Link |
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| CN (1) | CN107605521B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111946378B (en) * | 2020-07-29 | 2022-09-27 | 煤炭科学研究总院有限公司 | Light electric bracket for coal mine |
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| CN2095936U (en) * | 1991-08-03 | 1992-02-12 | 朱旭 | Mechanical hydraulic support for top coal releasing |
| CN101457652A (en) * | 2008-05-13 | 2009-06-17 | 天地科技股份有限公司 | Overlarge mining height hydraulic support |
| CN202381111U (en) * | 2012-05-02 | 2012-08-15 | 北京宇田世纪矿山设备有限公司 | Four-post-supported double pendulum rod hydraulic support |
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| CN202832574U (en) * | 2012-09-05 | 2013-03-27 | 三一重型装备有限公司 | Large mining height hydraulic support |
| CN104018866A (en) * | 2014-05-12 | 2014-09-03 | 山东鲁南装备制造有限公司 | Double four-bar linkage mechanism low-position blasting coal hydraulic support |
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| CN106948850A (en) * | 2017-04-28 | 2017-07-14 | 重庆工程职业技术学院 | Hydraulic support approximate straight-line locus four-bar mechanism |
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2017
- 2017-08-21 CN CN201710719281.XA patent/CN107605521B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213791U (en) * | 1987-10-04 | 1988-07-27 | 煤炭工业部煤炭科学研究院北京开采研究所 | Four joint rod hydraulic support frame |
| CN88203239U (en) * | 1988-02-09 | 1988-10-19 | 煤炭工业部煤炭科学院研究院太原分院 | New four-bar-linkage force transmission unit with hydraulic stand |
| CN2095936U (en) * | 1991-08-03 | 1992-02-12 | 朱旭 | Mechanical hydraulic support for top coal releasing |
| CN101457652A (en) * | 2008-05-13 | 2009-06-17 | 天地科技股份有限公司 | Overlarge mining height hydraulic support |
| CN202467883U (en) * | 2012-01-20 | 2012-10-03 | 北京宇田世纪矿山设备有限公司 | Light-duty hydraulic support for bistable reverse four-link mechanism |
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| CN104018866A (en) * | 2014-05-12 | 2014-09-03 | 山东鲁南装备制造有限公司 | Double four-bar linkage mechanism low-position blasting coal hydraulic support |
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| CN107605521A (en) | 2018-01-19 |
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