CN117067415B - Pressure-adjustable hydraulic supporting device - Google Patents
Pressure-adjustable hydraulic supporting device Download PDFInfo
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- CN117067415B CN117067415B CN202311312268.4A CN202311312268A CN117067415B CN 117067415 B CN117067415 B CN 117067415B CN 202311312268 A CN202311312268 A CN 202311312268A CN 117067415 B CN117067415 B CN 117067415B
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- piston cylinder
- inner cavity
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- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 230000000903 blocking effect Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000013078 crystal Substances 0.000 abstract description 34
- 239000003921 oil Substances 0.000 description 30
- 238000007789 sealing Methods 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
- B28D5/0082—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material for supporting, holding, feeding, conveying or discharging work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
- B28D5/0058—Accessories specially adapted for use with machines for fine working of gems, jewels, crystals, e.g. of semiconductor material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a hydraulic supporting device with adjustable pressure, which comprises a push rod, a piston, a first driving mechanism and a second driving mechanism; the device also comprises a first cylinder body, wherein the first cylinder body is symmetrically provided with two groups, and the ejector rods are correspondingly provided with two groups and are respectively arranged in the two groups of first cylinder bodies in a sliding manner through the driving of the first driving mechanism; the piston cylinder body is fixed on the two groups of first cylinder bodies, the pistons of the piston cylinder body are symmetrically provided with two groups and are arranged in the piston cylinder body in a sliding mode through the driving of the second driving mechanism, the inner cavity of the piston cylinder body is communicated with the inner cavity of the first cylinder body, the piston compresses the side wall of the ejector rod through the communicating part, and the piston cylinder body is further provided with a pressure regulating assembly for regulating the pressure of the inner cavity of the piston cylinder body. According to the supporting device, after the ejector rod supports the crystal bar, the ejector rod can be locked and fixed through the piston, so that the supporting stability is effectively improved.
Description
Technical Field
The invention relates to a supporting device, in particular to a hydraulic supporting device with adjustable pressure.
Background
The crystal bar is a product manufactured primarily in the photovoltaic industry, the crystal bar needs to be processed into a required column shape in the crystal bar manufacturing process, and when the crystal bar is transported to a processing position, the crystal bar needs to be jacked up through a supporting device and is matched with a limiting part above the crystal bar to fix the crystal bar.
The existing supporting device generally supports and supports the tight crystal bar through the jacking of the air cylinder, however, after supporting and supporting the tight crystal bar, when processing, the supporting stability is poor, the ejector rod is easy to shake, the crystal bar supporting surface is uneven, the instability of the process of supporting the crystal bar by the supporting device can be increased, the processing effect of the crystal bar is affected, and the service life of the supporting device can be reduced.
Disclosure of Invention
The invention aims to provide a hydraulic supporting device with adjustable pressure so as to solve the technical problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: a hydraulic supporting device with adjustable pressure comprises a push rod, a piston, a first driving mechanism and a second driving mechanism;
the two groups of the ejector rods are correspondingly arranged, and are respectively and slidably arranged in the two groups of the first cylinders through the driving of the first driving mechanism;
the piston cylinder body is fixed on the two groups of first cylinder bodies, the pistons are symmetrically provided with two groups and are arranged in the piston cylinder body in a sliding mode through the driving of the second driving mechanism, the inner cavity of the piston cylinder body is communicated with the inner cavity of the first cylinder body, the piston compresses the side wall of the ejector rod through the communicating part, and the piston cylinder body is further provided with a pressure regulating assembly for regulating the pressure of the inner cavity of the piston cylinder body.
Preferably, the top of the piston cylinder body is provided with an oil inlet, the piston cylinder body is provided with an annular wall at the oil inlet, the pressure regulating assembly comprises an oil blocking piston and a positioning sleeve, the oil blocking piston is inserted into the annular wall, and the positioning sleeve is sleeved on the annular wall in a threaded manner and is used for compressing the oil blocking piston.
Preferably, the first driving mechanism is an air pump for pumping air into the inner cavity of the first cylinder body through the pipe joint.
Preferably, the second driving mechanism comprises a cylinder and a piston rod, one ends of the two groups of first cylinder bodies are connected with a bottom plate, a protecting sleeve is connected between the middle part of the piston cylinder body and the bottom plate, the piston rod is arranged between the two groups of pistons and is arranged on the piston cylinder body in a sliding manner, and one end of the piston rod is arranged outside the piston cylinder body and is connected with the output end of the cylinder.
Preferably, the two side outer walls of the piston cylinder body are provided with communication ports communicated with the inner cavity of the first cylinder body, a base rod is arranged in the communication ports, one end of the base rod, which is positioned in the inner cavity of the first cylinder body, is fixedly provided with a sliding block, and the side wall of the ejector rod is provided with a sliding groove which is in sliding connection with the sliding block.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by arranging the two groups of ejector rod structures, the support and the propping can be adapted to the unevenness of the crystal bar support surface; after the ejector rod is lifted to jack up and tightly prop up the crystal bar, the side wall of the ejector rod is pressed by the piston, so that the locking effect on the ejector rod can be increased, and the stability of the ejector rod for supporting the crystal bar is improved; the top of the piston cylinder body is provided with the pressure regulating assembly, hydraulic oil can be injected into the piston cylinder body and the space size of the inner cavity of the piston cylinder body can be regulated, so that the piston keeps good locking effect on the ejector rod.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic view showing the internal structure of the hydraulic support device according to the present embodiment;
fig. 3 is an exploded view showing the pressure regulating assembly according to the present embodiment.
In the drawings, the list of components represented by the various numbers is as follows:
1. a push rod; 2. a piston; 3. a first cylinder; 4. a sheath; 5. a piston cylinder; 6. a pressure regulating assembly; 61. an oil blocking piston; 62. a positioning sleeve; 7. an oil inlet; 8. an annular wall; 9. a pressure regulating port; 10. sealing the mouth; 11 air port pipe joints; 13. a cylinder; 14. a piston rod; 15. a bottom plate; 16. a protective sleeve; 17. a base rod; 18. a slide block; 19. a chute; 20. and (3) sealing rings.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the hydraulic supporting device with adjustable pressure comprises a push rod 1, a piston 2, a first driving mechanism and a second driving mechanism;
still include first cylinder body 3, first cylinder body 3 symmetry is provided with two sets of, ejector pin 1 corresponds and is equipped with two sets of and through first actuating mechanism drive sliding respectively in two sets of first cylinder body 3, first actuating mechanism corresponds and sets up two sets of, independent drive both sides ejector pin 1 respectively, make the uneven face that two sets of ejector pins 1 adaptable crystal bar holding surface form the multiple spot and support, all be fixed with sheath 4 on the ejector pin 1 (the sheath 4 top has the side direction feed mechanism that supports the contact directly with the crystal bar through bolted connection, ejector pin 1 rises and then drives side direction feed mechanism jack-up crystal bar, both sides ejector pin 1 all is connected with side direction feed mechanism, side direction feed mechanism and sheath's connected mode are prior art), it is to say: the piston 2 is used for compacting the ejector rod 1 when the ejector rod 1 supports the crystal bar, and the piston 2 is matched with the first driving mechanism, so that the ejector rod 1 is better kept stable in the process of supporting and fixing the crystal bar;
still include piston cylinder body 5, piston cylinder body 5 intracavity sets up hydraulic oil, piston cylinder body 5 is fixed in on two sets of first cylinder body 3, piston 2 symmetry is equipped with two sets of, and all drive the slip through the second actuating mechanism and set up in piston cylinder body 5, piston cylinder body 5 inner chamber is linked together with first cylinder body 3 inner chamber, the second actuating mechanism is through compressing the space in piston cylinder body 5 inner chamber, drive piston 2 in the intercommunication department slip, thereby make piston 2 compress tightly ejector pin 1 lateral wall by the intercommunication department, piston 2 is used for compressing tightly ejector pin 1's one side terminal surface and ejector pin 1 lateral wall shape adaptation, in order to increase the locking effect of piston 2 to ejector pin 1, still be equipped with on the piston cylinder body 5 and be used for adjusting piston cylinder body 5 inner chamber pressure's pressure regulating assembly 6.
Specifically, the top of the piston cylinder body 5 is provided with an oil inlet 7, the piston cylinder body 5 is provided with an annular wall 8 at the position of the oil inlet 7, the pressure regulating assembly 6 comprises an oil blocking piston 61 and a positioning sleeve 62 which are inserted into the annular wall 8, the positioning sleeve 62 is sleeved on the annular wall 8 in a threaded manner and is used for compacting the oil blocking piston 61, an exhaust port 9 is arranged at the position, opposite to the oil inlet 7, of the oil blocking piston 61, a sealing port 10 is arranged at the position of the exhaust port 9, a sealing bolt is connected at the position of the sealing port 10 in a threaded manner, hydraulic oil can be added into the inner cavity of the piston cylinder body 5 through the position of the oil inlet 7, and certain hydraulic oil can be lost after the piston 2 in the piston cylinder body 5 moves for a long time, so that the pressure in the piston cylinder body 5 is reduced, and the inner cavity of the piston cylinder body 5 can be kept by the hydraulic oil added through the oil inlet 7; after the oil blocking piston 61 is inserted into the annular wall 8 to block the oil inlet 7, the positioning sleeve 62 sleeved on the annular wall 8 can compress the oil blocking piston 61, so that the movement of the oil blocking piston 61 due to the pressure change in the piston cylinder 5 is avoided, and as the gas exists in the inner cavity of the piston cylinder 5, the gas in the inner cavity of the piston cylinder 5 is discharged from the gas outlet 9 when the positioning sleeve 62 moves on the annular wall 8 through threaded connection to press down the oil blocking piston 61, and after the positioning sleeve 62 repeatedly moves and drives the oil blocking piston 61 to move to discharge the gas in the inner cavity of the piston cylinder 5, the gas outlet 9 can be blocked by rotating the sealing bolt in the sealing port 10, which is to be explained: the positioning sleeve 62 can control the amount of the oil blocking piston 61 pressed into the annular wall 8 by moving on the annular wall 8, and can adjust the pressure in the inner cavity of the piston cylinder 5 so as to control the locking effect of the piston 2 on the ejector rod 1.
Specifically, the first driving mechanism is an air pump (not shown in the figure, which is used for pumping high-pressure air into the first cylinder 3) through a pipe joint to pump air into the inner cavity of the first cylinder 3, the upper end and the lower end of the ejector rod 1 at the two sides of the first cylinder 3 are respectively provided with an air port pipe joint 11, the air pump is connected with an electromagnetic valve, the two groups of air port pipe joints 11 are respectively connected with two groups of interfaces for air inlet and outlet of the electromagnetic valve through hoses, the electromagnetic valve can control an external air source to enter and break air from the inner cavity of the first cylinder 3, when the ejector rod 1 is required to jack up a crystal rod, the electromagnetic valve controls the air pump to pump air into the lower air port pipe joint 11 to pump air into the cavity (the lower position of the ejector rod) at the bottom of the first cylinder 3, so that after the crystal rod is processed, the electromagnetic valve controls the air pump to pump air into the upper cavity of the first cylinder 3, and the bottom cavity is in a pressure relief state, and therefore the ejector rod 1 can be moved back under the gravity of the ejector rod 1 and the pressure of the upper cavity, and the crystal rod can be transferred to a downward process; the above description should be given of: the upper chamber of the first cylinder 3 is isolated from the lower chamber by a sealing ring 20 for sealing, and it is to be noted that: a gap is reserved between the inner wall of the cavity at the lower part of the first cylinder body 3 and the outer peripheral wall at the lower part of the ejector rod 1, so that the pipe joint 11 can better pump gas into the lower cavity of the first cylinder body 3 without blocking the gas port by the side wall of the ejector rod 1.
Specifically, the second driving mechanism comprises a cylinder 13 and a piston rod 14, one end of each of the two groups of first cylinders 3 is connected with a bottom plate 15, a protective sleeve 16 is connected between the middle part of each of the piston cylinders 5 and the bottom plate 15, the piston rod 14 is arranged between the two groups of pistons 2 and is arranged on each of the piston cylinders 5 in a sliding manner, one end of each of the piston rods 14 is arranged outside each of the piston cylinders 5 and is connected with the output end of the corresponding cylinder 13, the piston rod 14 moves in each of the piston cylinders 5 through the expansion and contraction of the output end of the corresponding cylinder 13, so that the pressure in each of the piston cylinders 5 is changed, when the piston rod 14 moves in each of the piston cylinders 5, the pressure in each of the piston cylinders 5 can be increased to drive the corresponding piston 2 to compress against the corresponding ejector rod 1 for locking, and when the piston rod 14 moves in each of the piston cylinders 5, the pressure in each of the piston cylinders 5 can be reduced, so that the corresponding piston 2 moves towards the inner part of the piston cylinders 5 to cancel the compression of the corresponding ejector rod 1.
Specifically, the two side outer walls of the piston cylinder 5 are provided with communication ports communicated with the inner cavity of the first cylinder 3, a base rod 17 is arranged in the communication ports, one end of the base rod 17 positioned in the inner cavity of the first cylinder 3 is fixedly provided with a sliding block 18, the side wall of the ejector rod 1 is provided with a sliding groove 19 which is in sliding connection with the sliding block 18, and the ejector rod 1 can not rotate when moving in the first cylinder 3 through the arrangement of the sliding block 18.
One specific implementation of this embodiment is:
when the device is used, when the crystal bar is conveyed to the top of the hydraulic supporting device through conveying equipment (the conveying of the crystal bar is in an existing mode), the pressure of the inner cavity of the first cylinder body 3 is increased by pumping gas into the first cylinder body 3, and the ejector rod 1 in the first cylinder body 3 is driven to move upwards, so that the crystal bar is jacked up and is matched with a limiting mechanism (in the prior art) at the top of the crystal bar to fix the crystal bar; after the crystal bar is tightly propped by the ejector rod 1, the cylinder 13 is started, the output end of the cylinder 13 drives the piston rod 14 to move towards the interior of the piston cylinder body 5 to compress the space in the piston cylinder body 5, and the pistons 2 at two sides are driven to move towards the directions away from each other under the action of hydraulic oil, so that the ejector rods 1 at two sides are respectively propped against, the ejector rod 1 is stabilized at the current supporting position of the crystal bar, and therefore the crystal bar can be machined.
After the crystal bar is processed, the air outlet joint 12 can be opened to discharge air in the first cylinder body 3, meanwhile, the output end of the air cylinder 13 drives the piston rod 14 to move towards one end outside the piston cylinder body 5, so that the space pressure of the inner cavity of the piston cylinder body 5 is reduced, the pistons 2 at two sides move towards one side close to each other and are separated from the compression of the ejector rod 1, the ejector rod 1 moves downwards, and after the ejector rod 1 moves downwards, the crystal bar is transferred to another process by the conveying equipment.
After the hydraulic support device is used for a period of time, the hydraulic oil in the inner cavity of the piston cylinder body 5 has loss, the proper hydraulic oil can be added through the oil inlet 7, the oil inlet 7 is plugged through the oil plugging piston 61, the oil plugging piston 61 is tightly pressed in the annular inner wall through the positioning sleeve 62 in threaded connection, in the process of tightly pressing through the positioning sleeve 62, air in the inner cavity of the piston cylinder body 5 can be discharged from the air outlet 9 on the oil plugging piston 61, in order to better discharge the air in the inner cavity of the piston cylinder body 5, the positioning sleeve 62 can be made to reciprocate on the annular wall 8 through the forward and backward rotation of the positioning sleeve 62, the oil plugging piston 61 can reciprocate along with the positioning sleeve 62 under the action of the pressure in the inner cavity of the piston cylinder body 5, so that the air in the inner cavity of the piston cylinder body 5 is discharged more thoroughly, the sealing bolt is screwed in towards the sealing port 10, and the air outlet 9 is plugged, wherein the positioning sleeve 62 does not completely press the oil plugging piston 61, when the pressure in the inner cavity of the piston cylinder body 5 needs to be regulated, the pressing down amount of the oil plugging piston 61 in the annular wall 8 can be regulated through rotating the positioning sleeve 62, so that the pressure in the inner cavity of the piston cylinder body 5 can be regulated, and the piston rod 14 can be controlled to press the piston rod 2.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (2)
1. A pressure-adjustable hydraulic support device, characterized in that: comprises a push rod (1), a piston (2), a first driving mechanism and a second driving mechanism;
the first driving mechanism is an air pump for pumping air into the inner cavity of the first cylinder body (3) through a pipe joint;
the device further comprises first cylinder bodies (3), wherein the first cylinder bodies (3) are symmetrically provided with two groups, and the ejector rods (1) are correspondingly provided with two groups and are respectively arranged in the two groups of first cylinder bodies (3) in a sliding manner through driving of a first driving mechanism;
the piston cylinder body (5) is fixed on the two groups of first cylinder bodies (3), the pistons (2) are symmetrically provided with two groups and are arranged in the piston cylinder body (5) in a sliding mode through the second driving mechanism, the inner cavity of the piston cylinder body (5) is communicated with the inner cavity of the first cylinder body (3), the piston (2) is tightly pressed on the side wall of the ejector rod (1) through the communicating part, and the piston cylinder body (5) is further provided with a pressure regulating assembly (6) for regulating the pressure of the inner cavity of the piston cylinder body (5);
the second driving mechanism comprises a cylinder (13) and a piston rod (14), one ends of the two groups of first cylinder bodies (3) are connected with a bottom plate (15), a protective sleeve (16) is connected between the middle part of the piston cylinder body (5) and the bottom plate (15), the piston rod (14) is positioned between the two groups of pistons (2) and is arranged on the piston cylinder body (5) in a sliding manner, and one end of the piston rod (14) is positioned outside the piston cylinder body (5) and is connected with the output end of the cylinder (13);
the top of the piston cylinder body (5) is provided with an oil inlet (7), the position of the piston cylinder body (5) at the oil inlet (7) is provided with an annular wall (8), the pressure regulating assembly (6) comprises an oil blocking piston (61) and a positioning sleeve (62) which are inserted into the annular wall (8), and the positioning sleeve (62) is sleeved on the annular wall (8) in a threaded manner and is used for pressing the oil blocking piston (61).
2. A pressure adjustable hydraulic support device according to claim 1, wherein: the piston cylinder body (5) is characterized in that the outer walls of the two sides of the piston cylinder body (5) are provided with communication ports communicated with the inner cavity of the first cylinder body (3), a base rod (17) is arranged in the communication ports, one end of the base rod (17) positioned in the inner cavity of the first cylinder body (3) is fixedly provided with a sliding block (18), and the side wall of the ejector rod (1) is provided with a sliding groove (19) which is in sliding connection with the sliding block (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311312268.4A CN117067415B (en) | 2023-10-11 | 2023-10-11 | Pressure-adjustable hydraulic supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311312268.4A CN117067415B (en) | 2023-10-11 | 2023-10-11 | Pressure-adjustable hydraulic supporting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117067415A CN117067415A (en) | 2023-11-17 |
| CN117067415B true CN117067415B (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311312268.4A Active CN117067415B (en) | 2023-10-11 | 2023-10-11 | Pressure-adjustable hydraulic supporting device |
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| Country | Link |
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| CN (1) | CN117067415B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014217989A1 (en) * | 2014-09-09 | 2016-03-10 | Schaeffler Technologies AG & Co. KG | Hydraulic support element |
| CN108035591A (en) * | 2017-12-07 | 2018-05-15 | 成都益睿信科技有限公司 | A kind of supporting rack of Manual height |
| CN209025908U (en) * | 2018-09-28 | 2019-06-25 | 燕山大学 | A kind of hydraulic support cylinder |
| CN213711471U (en) * | 2020-10-20 | 2021-07-16 | 河马智能科技(无锡)有限公司 | Hydraulic oil cylinder for double mechanical locks of axial force support servo system |
| CN113338173A (en) * | 2021-07-27 | 2021-09-03 | 董玉凯 | Support arrangement for bridge construction |
-
2023
- 2023-10-11 CN CN202311312268.4A patent/CN117067415B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014217989A1 (en) * | 2014-09-09 | 2016-03-10 | Schaeffler Technologies AG & Co. KG | Hydraulic support element |
| CN108035591A (en) * | 2017-12-07 | 2018-05-15 | 成都益睿信科技有限公司 | A kind of supporting rack of Manual height |
| CN209025908U (en) * | 2018-09-28 | 2019-06-25 | 燕山大学 | A kind of hydraulic support cylinder |
| CN213711471U (en) * | 2020-10-20 | 2021-07-16 | 河马智能科技(无锡)有限公司 | Hydraulic oil cylinder for double mechanical locks of axial force support servo system |
| CN113338173A (en) * | 2021-07-27 | 2021-09-03 | 董玉凯 | Support arrangement for bridge construction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117067415A (en) | 2023-11-17 |
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