CN110000547A - A kind of step type hydraulic pin pulling out device - Google Patents
A kind of step type hydraulic pin pulling out device Download PDFInfo
- Publication number
- CN110000547A CN110000547A CN201910414734.7A CN201910414734A CN110000547A CN 110000547 A CN110000547 A CN 110000547A CN 201910414734 A CN201910414734 A CN 201910414734A CN 110000547 A CN110000547 A CN 110000547A
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- CN
- China
- Prior art keywords
- lead screw
- oil cylinder
- pulling out
- out device
- type hydraulic
- 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.)
- Pending
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- 238000000605 extraction Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 3
- 239000000284 extract Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001746 atrial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
Abstract
The invention discloses a kind of step type hydraulic pin pulling out device, supporting structure including fixed setting, the lead screw connecting for the wire hole with pin shaft, the control system for driving lead screw to the mobile oil cylinder in the extraction direction of pin shaft and for controlling cylinder action；Oil cylinder is fixedly installed on supporting structure, and lead screw is provided with the block being bonded for the piston rod with oil cylinder so that oil cylinder drives lead screw mobile, and block is used for removable relative to lead screw along the length direction of lead screw and can be fixedly installed；Oil cylinder is connect with control system.Step type hydraulic pin pulling out device provided by the invention, it is possible to prevente effectively from the process that manpower is pulled pin, the difficulty for extracting pin shaft is reduced, and the efficiency pulled pin can be improved, and is reduced cost of labor, is improved the security intensity of operation.In addition, step type hydraulic pin pulling out device structure is simple, compact reliable, easy to carry and operation.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, more specifically to a kind of step type hydraulic pin pulling out device.
Background technique
Large hydraulic bracket is often referred to height in 5 meters or more of bracket, and large hydraulic bracket is delivering, going into the well, turning face etc.
In the process, since its volume is larger, it is therefore desirable to be carried after large hydraulic bracket disintegrates, need to connect during disintegrating
The pin shaft for connecing effect is extracted, but during use, encountering the special feelings such as pin shaft corrosion or top beam and caving shield dislocation
When condition, pin shaft is often difficult to extract.
Usually pin shaft is extracted by manpower in the prior art, in the case where pin shaft more difficult extraction, manually-operated mistake
The journey time is long and there are some potential safety problemss.
It is current those skilled in the art in conclusion how to reduce the difficulty of large hydraulic rack pin shaft withdrawal process
Urgent problem to be solved.
Summary of the invention
In view of this, can will occur to corrode or locate the object of the present invention is to provide a kind of step type hydraulic pin pulling out device
It is smoothly extracted in top beam and the pin shaft in caving shield misconstruction, improves working efficiency, reduce security risk.
To achieve the goals above, the invention provides the following technical scheme:
A kind of step type hydraulic pin pulling out device, supporting structure including fixed setting are connect for the wire hole with pin shaft
Lead screw, for driving the lead screw to the mobile oil cylinder in the extraction direction of the pin shaft and for controlling the cylinder action
Control system；
The oil cylinder is fixedly installed on the supporting structure, and the lead screw is provided with for pasting with the piston rod of the oil cylinder
It closes so that the block that the oil cylinder drives the lead screw mobile, the block are used for the length direction along the lead screw relative to institute
Lead screw is stated to move and can be fixedly installed；
The oil cylinder is connect with the control system.
Preferably, the piston rod is hollow structure, and the piston rod is movably arranged relative to the lead screw, described
Piston rod is set in the peripheral part of the lead screw.
Preferably, the block is the nut for being set in the lead screw peripheral part, and the nut and the threads of lead screw connect
It connects, and the outer diameter of the nut is greater than the internal diameter of the hollow structure of the piston rod.
Preferably, one end that the lead screw is connect with the pin shaft is provided with the silk head for connecting with the wire hole, institute
Silk head is stated to be detachably connected with the lead screw.
Preferably, the supporting structure includes the sleeve of fixed setting, and the oil cylinder is set to the inside of the sleeve, and
The central axis of the piston rod is overlapped with the central axis of the sleeve.
Preferably, the sleeve is provided with close to one end of the pin shaft for playing guiding for the direction of motion of the lead screw
The guide sleeve of effect and the top cover for being set in the guide sleeve peripheral part, the top cover and the sleeve connection.
Preferably, the fixed frame of the sleeve being internally provided with for fixing the oil cylinder.
Preferably, the outer wall of the sleeve is provided with the handle for facilitating grasping, and the handle is provided with for matching with hand shape
The groove of conjunction.
Step type hydraulic pin pulling out device provided by the invention, supporting structure including fixed setting, for the silk with pin shaft
The lead screw of hole connection, the control for driving lead screw to the mobile oil cylinder in the extraction direction of pin shaft and for controlling cylinder action
System；Oil cylinder is fixedly installed on supporting structure, and lead screw, which is provided with, to be bonded so that oil cylinder drives lead screw for the piston rod with oil cylinder
Mobile block, block are used for removable relative to lead screw along the length direction of lead screw and can be fixedly installed；Oil cylinder and control are
System connection.
During use, supporting structure is fixedly installed first, then connects the wire hole of lead screw and pin shaft, adjustment
Block is to the position that is bonded with the end face of separate the pin shaft side of piston rod, and then operation control system control piston rod is to separate
The direction of pin shaft is mobile, then piston rod drives block mobile to the direction far from pin shaft, and because block is connect with lead screw,
It is mobile to the direction far from pin shaft to will drive lead screw, pin shaft is made to extract certain distance outward；Then control system controls piston rod
To, at this time direction movement from piston rod to separate block mobile close to the side of pin shaft, therefore lead screw is not subjected to displacement, and is then made
Block is mobile relative to the direction of lead screw to close pin shaft, until block is bonded with the end face of the separate pin shaft side of piston rod；
Then above steps may be repeated multiple times, can extract pin shaft.
Step type hydraulic pin pulling out device provided by the invention, it is possible to prevente effectively from the process that manpower is pulled pin, extracts pin shaft
Difficulty reduce, can be improved the efficiency pulled pin, reduce cost of labor, improve the security intensity of operation.
In addition, step type hydraulic pin pulling out device structure is simple, compact reliable, easy to carry and operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the specific embodiment one of step type hydraulic pin pulling out device provided by the present invention.
In Fig. 1:
1 it is lead screw, 2 be oil cylinder, 3 be block, 4 be sleeve, 5 be guide sleeve, 6 be top cover, 7 is fixed frame.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Core of the invention is to provide a kind of step type hydraulic pin pulling out device, can make pulling out for pin shaft in large hydraulic bracket
Process is more convenient out, makes to occur to corrode or smoothly extract in top beam and the pin shaft in caving shield misconstruction, improves work
Efficiency reduces security risk.
Referring to FIG. 1, the structure that Fig. 1 is the specific embodiment one of step type hydraulic pin pulling out device provided by the present invention is shown
It is intended to.
The step type hydraulic pin pulling out device that this specific embodiment provides, supporting structure including fixed setting are used for and pin
Axis wire hole connection lead screw 1, for drive lead screw 1 to the extractions direction of pin shaft move oil cylinder 2 and for controlling oil cylinder 2
The control system of movement；Oil cylinder 2 is fixedly installed on supporting structure, lead screw 1 be provided with for being bonded with the piston rod of oil cylinder 2 so that
The block 3 that oil cylinder 2 drives lead screw 1 mobile, block 3 are used for removable relative to lead screw 1 along the length direction of lead screw 1 and can fix
Setting；Oil cylinder 2 is connect with control system.
It needs to be illustrated, for oil cylinder 2 to be fixedly mounted, the structure type of supporting structure can be supporting structure
Rod-like structure is also possible to tubular structure, determines that this will not be repeated here with specific reference to actual conditions.
During use, supporting structure is fixedly installed first, then connect lead screw 1 with the wire hole of pin shaft, adjusted
Whole block 3 to the position being bonded with the end face of the separate pin shaft side of piston rod, then operation control system control piston rod to
Direction far from pin shaft is mobile, then piston rod drives block 3 mobile to the direction far from pin shaft, and because block 3 and lead screw 1 connect
It connects, therefore will drive lead screw 1 to the direction movement far from pin shaft, pin shaft is made to extract certain distance outward；Then control system control
Piston rod processed is to, at this time direction movement from piston rod to separate block 3 mobile close to the side of pin shaft, therefore lead screw 1 does not occur
Then displacement makes block 3 mobile to the direction of close pin shaft relative to lead screw 1, until the separate pin shaft one of block 3 and piston rod
The end face of side is bonded；Then above steps may be repeated multiple times, can extract pin shaft.
It needs to be further illustrated, during the piston rod movement of oil cylinder 2, as shown in Figure 1, when needing piston
When bar is mobile to one end far from pin shaft, the right side feed liquor of oil cylinder 2 can be controlled by control system, so that right atrial pressure be made to increase
Add, piston rod is pushed to move to the left；When needing piston rod to close to the movement of one end of pin shaft, control system control can be passed through
The left side feed liquor of liquefaction cylinder 2 pushes piston rod to move to the right so that left pressure be made to increase；Preferably, piston rod can be made
The distance that single is moved to the left or right is 100mm.
Step type hydraulic pin pulling out device provided by the invention, it is possible to prevente effectively from the process that manpower is pulled pin, extracts pin shaft
Difficulty reduce, can be improved the efficiency pulled pin, reduce cost of labor, improve the security intensity of operation.
In addition, step type hydraulic pin pulling out device structure is simple, compact reliable, easy to carry and operation.
Preferably, since large-scale hydraulic support is generally used for the exploitation engineering of coal mine, in work progress, underground is general
It is provided with emulsification pump pipeline, oil cylinder 2 during use, can directly connect with emulsification pump pipeline, utilize the pressure of pumping plant
It is used as power of pulling pin, does not need additional power source, saves resource.
It needs to be illustrated, is in relatively fixed state, therefore piston between block 3 and lead screw 1 under natural conditions
It is mobile that bar can drive block 3, and keeps lead screw 1 mobile, and when artificial mobile block 3, block 3 can be mobile relative to lead screw 1.
On the basis of the above embodiments, in order to make to be more uniformly stressed during lead screw 1 is mobile, piston rod can be made
For hollow structure, and piston rod is movably arranged relative to lead screw 1, and piston rod is set in the peripheral part of lead screw 1.
As shown in Figure 1, piston rod in the middle part of be provided with cylindrical, hollow chamber, it is preferred that the central axis of hollow chamber with
The central axis of piston rod is overlapped, and lead screw 1 is set in hollow chamber, and the center of the central axis of lead screw 1 and hollow chamber
Axis is overlapped.
During use, since piston rod is set in the peripheral part of lead screw 1, installation space on the one hand can be saved,
Another party can avoid lead screw 1 from deforming because bearing moment of flexure so that lead screw 1 is more uniformly stressed.
On the basis of the above embodiments, block 3 can be set to being set in the nut of 1 peripheral part of lead screw, nut with
Lead screw 1 is threadedly coupled, and the outer diameter of nut is greater than the internal diameter of the hollow structure of piston rod.
Since the outer surface of lead screw 1 is provided with external screw thread, the inner surface of nut is provided with internal screw thread, therefore nut is set in
The peripheral part of screw rod, and be threadedly coupled between nut and lead screw 1.
During use, nut can be made to move along the length direction of lead screw 1 by rotating nut, when piston rod band
When dynamic nut is mobile to one end far from pin shaft, since nut is threadedly coupled with lead screw 1, lead screw 1 can be driven to separate
One end synchronizing moving of pin shaft, piston rod can keep nut close to after the movement of one end of pin shaft by rotating nuts
Side of the piston rod far from pin shaft.
It needs to be illustrated, the outer diameter of nut, refers to nut periphery hexagon inscribe diameter of a circle, the outer diameter of nut
Nut can be pushed to drive during moving piston rod to one end far from pin shaft greater than the internal diameter of hollow structure
Lead screw 1 is mobile.
On the basis of the above embodiments, it in order to adapt to various sizes of pin shaft, can be connect in lead screw 1 with pin shaft
One end silk head for connecting with wire hole is set, silk head is detachably connected with lead screw 1.
After the size of pin shaft changes, the wire hole in pin shaft can also occur to change accordingly, therefore can correspond to
Setting sizes silk head, the peripheral part of silk head is provided with the external screw thread for cooperating with wire hole, when the size of pin shaft is sent out
After changing, various sizes of silk head is only needed to change.
It needs to be illustrated, connection can be clamped between silk head and lead screw 1, be also possible to be attracted by quick change construction
Connection or other satisfactory dismountable connection types determine that this will not be repeated here with specific reference to actual conditions.
On the basis of the above embodiments, in order to avoid the dust of underground during pulling pin enters 1 table of oil cylinder 2 or lead screw
Face, can make supporting structure includes the sleeve 4 of fixed setting, and oil cylinder 2 is set to the inside of sleeve 4, and the central axis of piston rod
Line is overlapped with the central axis of sleeve 4.
Preferably, it can be provided with close to one end of pin shaft for playing the guiding role for the direction of motion of lead screw 1 in sleeve 4
Guide sleeve 5 and be set in the top cover 6 of 5 peripheral part of guide sleeve, top cover 6 is connect with sleeve 4.
As shown in Figure 1, guide sleeve 5 is set to lead screw 1 close to one end of pin shaft, it is preferred that guide sleeve 5 is stainless steel material
Tubular structure.
Preferably, guide sleeve 5 includes the inner ring guide part connecting with lead screw 1, and is set to inner ring guide part peripheral part
Outer ring guide part, and inner ring guide part can be moved relative to outer ring guide part along the length direction of lead screw 1, be pulled out outward in pin shaft
During out, inner ring guide part is moved synchronously with lead screw 1, outer ring guide part fixed setting, so that pin shaft is led relative to outer ring
It is mobile to portion, until pin shaft is extracted.
Preferably, the fixed frame 7 for fixing oil cylinder 2 can be set in the inside of sleeve 4.
Fixed frame 7 can be the circular configuration being set to inside sleeve 4, be also possible to have the spoke-like of multiple support frames
Structure determines that this will not be repeated here with specific reference to actual conditions.
Step type hydraulic pin pulling out device band is set into underground for convenience, can be arranged in the outer wall of sleeve 4 and facilitate grasping
Handle, handle are provided with the groove for cooperating with hand shape.
During carrying, step type hydraulic pin pulling out device can be grasped by handle.
Preferably, the groove for connecting with sleeve 4 can be set in top cover 6, sleeve 4 can be embedded in inside grooves.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.All realities provided by the present invention
Any combination mode of example is applied in the protection scope of the invention, this will not be repeated here.
Step type hydraulic pin pulling out device provided by the present invention is described in detail above.It is used herein specifically
Principle and implementation of the present invention are described for a example, the present invention that the above embodiments are only used to help understand
Method and its core concept.It should be pointed out that for those skilled in the art, not departing from original of the invention
, can be with several improvements and modifications are made to the present invention under the premise of reason, these improvement and modification also fall into right of the present invention and want
In the protection scope asked.
Claims (8)
1. a kind of step type hydraulic pin pulling out device, which is characterized in that supporting structure including fixed setting, for the silk with pin shaft
Hole connection lead screw (1), for drive the lead screw (1) Xiang Suoshu pin shaft extractions direction move oil cylinder (2) and be used for
Control the control system of the oil cylinder (2) movement；
The oil cylinder (2) is fixedly installed on the supporting structure, and the lead screw (1) is provided with for the work with the oil cylinder (2)
Stopper rod is bonded so that the block (3) that the oil cylinder (2) drives the lead screw (1) mobile, the block (3) are used for along the lead screw
(1) length direction is removable relative to the lead screw (1) and can be fixedly installed；
The oil cylinder (2) connect with the control system.
2. step type hydraulic pin pulling out device according to claim 1, which is characterized in that the piston rod is hollow structure,
And the piston rod is movably arranged relative to the lead screw (1), the piston rod is set in the peripheral part of the lead screw (1).
3. step type hydraulic pin pulling out device according to claim 2, which is characterized in that the block (3) is is set in
The nut of lead screw (1) peripheral part is stated, the nut is threadedly coupled with the lead screw (1), and the outer diameter of the nut is greater than described
The internal diameter of the hollow structure of piston rod.
4. step type hydraulic pin pulling out device according to claim 3, which is characterized in that the lead screw (1) and the pin shaft
One end of connection is provided with the silk head for connecting with the wire hole, and the silk head is detachably connected with the lead screw (1).
5. step type hydraulic pin pulling out device according to claim 1-4, which is characterized in that the supporting structure packet
The sleeve (4) of fixed setting is included, the oil cylinder (2) is set to the inside of the sleeve (4), and the central axis of the piston rod
It is overlapped with the central axis of the sleeve (4).
6. step type hydraulic pin pulling out device according to claim 5, which is characterized in that the sleeve (4) is close to the pin
One end of axis is provided with the guide sleeve (5) for being used for playing the guiding role for the direction of motion of the lead screw (1) and is set in described
The top cover (6) of guide sleeve (5) peripheral part, the top cover (6) connect with the sleeve (4).
7. step type hydraulic pin pulling out device according to claim 6, which is characterized in that the inside of the sleeve (4) is arranged
There is the fixed frame (7) for fixing the oil cylinder (2).
8. step type hydraulic pin pulling out device according to claim 7, which is characterized in that the outer wall of the sleeve (4) is arranged
There is the handle for facilitating grasping, the handle is provided with the groove for cooperating with hand shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414734.7A CN110000547A (en) | 2019-05-17 | 2019-05-17 | A kind of step type hydraulic pin pulling out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414734.7A CN110000547A (en) | 2019-05-17 | 2019-05-17 | A kind of step type hydraulic pin pulling out device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110000547A true CN110000547A (en) | 2019-07-12 |
Family
ID=67177342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910414734.7A Pending CN110000547A (en) | 2019-05-17 | 2019-05-17 | A kind of step type hydraulic pin pulling out device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110000547A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04240026A (en) * | 1991-01-21 | 1992-08-27 | Meiki Co Ltd | Automatic pin pulling-out device |
| CN101829896A (en) * | 2010-05-16 | 2010-09-15 | 山西沁新能源集团股份有限公司 | Advancing jack split pin remover |
| US20110010909A1 (en) * | 2009-07-17 | 2011-01-20 | Tiger Tool International Incorporated | Pin puller |
| CN103100843A (en) * | 2011-11-10 | 2013-05-15 | 陈其根 | Pin pulling machine |
| CN203125092U (en) * | 2013-04-08 | 2013-08-14 | 淮南矿业(集团)有限责任公司 | Hydraulic pin pulling device |
| CN203356979U (en) * | 2013-07-30 | 2013-12-25 | 姜广利 | Pin dismounting device |
| CN104526324A (en) * | 2014-12-29 | 2015-04-22 | 枣庄矿业集团高庄煤业有限公司 | Pin shaft dismounting device for coal mine hydraulic support |
| CN204419180U (en) * | 2014-12-26 | 2015-06-24 | 大同煤矿集团有限责任公司 | Fully-mechanized mining working disintegration face end support pin pulling out device |
| CN205057924U (en) * | 2015-09-22 | 2016-03-02 | 平顶山平煤机煤矿机械装备有限公司 | Hydraulic pin puller |
| CN105751150A (en) * | 2016-04-28 | 2016-07-13 | 河南晶锐新材料股份有限公司 | Pin pulling device for cubic diamond press |
| CN205928463U (en) * | 2016-07-28 | 2017-02-08 | 姜瑞 | Hydraulic pressure pin pulling device |
| CN206605431U (en) * | 2017-04-09 | 2017-11-03 | 谷健忠 | Novel hydraulic pin removal |
| CN208758961U (en) * | 2018-08-15 | 2019-04-19 | 招商局重工（江苏）有限公司 | One kind pulling out shaft device |
| CN209998697U (en) * | 2019-05-17 | 2020-01-31 | 兖矿东华重工有限公司 | stepping hydraulic pin pulling device |
-
2019
- 2019-05-17 CN CN201910414734.7A patent/CN110000547A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04240026A (en) * | 1991-01-21 | 1992-08-27 | Meiki Co Ltd | Automatic pin pulling-out device |
| US20110010909A1 (en) * | 2009-07-17 | 2011-01-20 | Tiger Tool International Incorporated | Pin puller |
| CN101829896A (en) * | 2010-05-16 | 2010-09-15 | 山西沁新能源集团股份有限公司 | Advancing jack split pin remover |
| CN103100843A (en) * | 2011-11-10 | 2013-05-15 | 陈其根 | Pin pulling machine |
| CN203125092U (en) * | 2013-04-08 | 2013-08-14 | 淮南矿业(集团)有限责任公司 | Hydraulic pin pulling device |
| CN203356979U (en) * | 2013-07-30 | 2013-12-25 | 姜广利 | Pin dismounting device |
| CN204419180U (en) * | 2014-12-26 | 2015-06-24 | 大同煤矿集团有限责任公司 | Fully-mechanized mining working disintegration face end support pin pulling out device |
| CN104526324A (en) * | 2014-12-29 | 2015-04-22 | 枣庄矿业集团高庄煤业有限公司 | Pin shaft dismounting device for coal mine hydraulic support |
| CN205057924U (en) * | 2015-09-22 | 2016-03-02 | 平顶山平煤机煤矿机械装备有限公司 | Hydraulic pin puller |
| CN105751150A (en) * | 2016-04-28 | 2016-07-13 | 河南晶锐新材料股份有限公司 | Pin pulling device for cubic diamond press |
| CN205928463U (en) * | 2016-07-28 | 2017-02-08 | 姜瑞 | Hydraulic pressure pin pulling device |
| CN206605431U (en) * | 2017-04-09 | 2017-11-03 | 谷健忠 | Novel hydraulic pin removal |
| CN208758961U (en) * | 2018-08-15 | 2019-04-19 | 招商局重工（江苏）有限公司 | One kind pulling out shaft device |
| CN209998697U (en) * | 2019-05-17 | 2020-01-31 | 兖矿东华重工有限公司 | stepping hydraulic pin pulling device |
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