CN114151408A - Single-rod self-locking type double-acting hydraulic actuator - Google Patents
Single-rod self-locking type double-acting hydraulic actuator Download PDFInfo
- Publication number
- CN114151408A CN114151408A CN202111461368.4A CN202111461368A CN114151408A CN 114151408 A CN114151408 A CN 114151408A CN 202111461368 A CN202111461368 A CN 202111461368A CN 114151408 A CN114151408 A CN 114151408A
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- China
- Prior art keywords
- self
- piston rod
- locking
- side wall
- outer side
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- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 51
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 210000001503 joint Anatomy 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
Abstract
The invention relates to a single-rod self-locking double-acting hydraulic actuator.A cylinder inner cavity is formed and processed in a cylinder body; the outer side wall of the cylinder body is provided with a through oil hole, and an oil outlet port extending out of the oil hole is communicated with the inner cavity of the cylinder body; the rear end opening of the cylinder body is provided with a bottom end cover through threaded connection; the outer side wall of the bottom end cover is provided with a retraction oil injection hole in a run-through mode; the inner side wall of the front end of the bottom end cover is embedded with an end cover inner sealing ring at intervals; the outer side wall of the front end of the bottom end cover is embedded with an end cover outer sealing ring; the rear end opening of the bottom end cover is connected with a sealing plug through threads; the outer side wall of the rear end of the sealing plug is embedded with a plug sealing ring; the single-rod self-locking double-acting hydraulic actuator provided by the invention has the advantages of small volume, small occupied installation space, stable locking of a double-acting trapezoidal self-locking thread structure, long-time support and difficulty in retraction.
Description
Technical Field
The invention belongs to the technical field related to mechanical equipment, and particularly relates to a single-rod self-locking type double-acting hydraulic actuator.
Background
The single-rod self-locking double-acting hydraulic actuator is mainly used for application working conditions needing long-time positioning or hydraulic support, a hydraulic lock valve structure, a double-rod self-locking structure and a single-acting self-locking structure are mostly adopted in common structures in the industry at present, the hydraulic lock valve structure has the problems of self internal leakage and sealing leakage of the hydraulic actuator, and long-time pressure maintaining and position keeping cannot be guaranteed, the double-rod self-locking structure occupies large space on site due to large product size, and causes space waste and manufacturing cost increase for installation, the single-acting self-locking structure is realized by adding mechanical threads and nuts outside a piston rod and is mechanical self-locking, but the structure can only realize one-way oil pressure and sacrifices the oil return function of the actuator, and the movement brings great difficulty for site use and adjustment.
Disclosure of Invention
The invention aims to provide a single-rod self-locking double-acting hydraulic actuator which is small in size, small in occupied installation space, stable in locking of a double-acting trapezoidal self-locking thread structure, capable of supporting for a long time and not easy to retract.
In order to achieve the purpose, the invention provides the following technical scheme: a single-rod self-locking type double-acting hydraulic actuator comprises a cylinder body, wherein a cylinder body inner cavity is formed in the cylinder body; the outer side wall of the cylinder body is provided with a through oil hole, and an oil outlet port extending out of the oil hole is communicated with the inner cavity of the cylinder body; the rear end opening of the cylinder body is provided with a bottom end cover through threaded connection; the outer side wall of the bottom end cover is provided with a retraction oil injection hole in a run-through mode; the inner side wall of the front end of the bottom end cover is embedded with an end cover inner sealing ring at intervals; the outer side wall of the front end of the bottom end cover is embedded with an end cover outer sealing ring; the rear end opening of the bottom end cover is connected with a sealing plug through threads; the outer side wall of the rear end of the sealing plug is embedded with a plug sealing ring; an oil guide hole is formed in the side wall of the sealing plug in a penetrating mode, and an oil inlet port of the oil guide hole is in butt joint with an oil outlet port of the retraction oil injection hole; a locking nut is machined on the inner side wall of the sealing plug; the locking nut is connected with a built-in piston rod through threads; a cavity of the built-in piston rod is formed in the built-in piston rod; the outer side wall of the front end of the built-in piston rod is symmetrically provided with oil return holes in a penetrating way; the front end of the built-in piston rod is connected with an extrusion ring; the outer side wall of the extrusion ring is sleeved with an extrusion ring sealing ring at intervals; a self-locking piston rod is fitted and installed in the inner cavity of the cylinder body, and the self-locking piston rod is sleeved on the outer side wall of the built-in piston rod; a self-locking piston rod cavity is formed in the self-locking piston rod; the outer side wall of the rear end of the self-locking piston rod is embedded with a self-locking piston rod outer guide ring and a self-locking piston rod inner guide ring at intervals; and the inner side wall of the rear end of the self-locking piston rod is embedded with a self-locking piston rod inner guide ring and a self-locking piston rod inner sealing ring at intervals.
As a further improvement of the invention, the front port of the cylinder body is connected with a positioning guide sleeve through threads.
As a further improvement of the invention, the outer side wall of the self-locking piston rod is provided with a trapezoidal thread; the self-locking piston rod is connected with a trapezoidal self-locking nut through a trapezoidal thread.
As a further improvement of the invention, the front port of the self-locking piston rod is connected with a connector through threads.
As a further improvement of the invention, the extension oil filling hole and the retraction oil filling hole are connected with an external hydraulic oil filling cylinder through pipelines.
Compared with the prior art, the invention has the beneficial effects that: according to the technical scheme, the telescopic self-locking piston rod and the fixed built-in piston rod are sleeved in the cylinder body in a layered mode, so that the overall size of the equipment is effectively reduced, and less installation space is occupied; according to the technical scheme, the self-locking piston rod is extended and retracted by injecting hydraulic oil into the extended oil injection hole and the retracted oil injection hole, the structure is simple and clear, and an operator can operate the self-locking piston rod more conveniently and quickly; the trapezoidal thread and the trapezoidal self-locking nut are arranged on the self-locking piston rod, when the self-locking piston rod extends out, the trapezoidal self-locking nut is attached to the positioning guide ring to be locked, even if leakage of hydraulic oil in the cylinder body occurs, retraction of the self-locking piston rod cannot be caused, continuous work can be conducted, and therefore when the pressure resistance of equipment is improved, the potential safety hazard caused by automatic retraction of the self-locking piston rod is also reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a cylinder body; 2. an inner cavity of the cylinder body; 3. extending out of the oil injection hole; 4. a bottom end cap; 5. retracting the oil filling hole; 6. an end cover inner sealing ring; 7. an end cover outer sealing ring; 8. sealing the plug; 9. a plug sealing ring; 10. an oil guide hole; 11. locking the nut; 12. a piston rod is arranged in the piston rod; 13. a piston rod cavity is arranged inside; 14. an oil return hole; 15. an extrusion ring; 16. extruding the ring seal ring; 17. a self-locking piston rod; 18. a self-locking piston rod cavity; 19. an outer guide ring of the self-locking piston rod; 20. the outer sealing ring of the self-locking piston rod; 21. an inner guide ring of the self-locking piston rod; 22. a self-locking piston rod inner sealing ring; 23. positioning a guide sleeve; 24. trapezoidal threads; 25. a trapezoidal self-locking nut; 26. a connecting head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a single-rod self-locking double-acting hydraulic actuator comprises a cylinder body 1, wherein a cylinder body inner cavity 2 is formed in the cylinder body 1; the outer side wall of the cylinder body 1 is provided with a through oil hole 3, and an oil outlet port extending out of the oil hole 3 is communicated with the inner cavity 2 of the cylinder body; by injecting hydraulic oil into the extending oil injection hole, the extending of the equipment can be realized, and an object is supported; the rear end opening of the cylinder body 1 is provided with a bottom end cover 4 through threaded connection; the outer side wall of the bottom end cover 4 is provided with a retraction oil injection hole 5 in a run-through way; the retraction of the equipment can be realized by injecting hydraulic oil into the retraction oil injection hole; an end cover inner sealing ring 6 is embedded into the inner side wall of the front end of the bottom end cover 4 at intervals; an end cover outer sealing ring 7 is embedded in the outer side wall of the front end of the bottom end cover 4; the rear end opening of the bottom end cover 4 is connected with a sealing plug 8 through threads; a plug sealing ring 9 is embedded in the outer side wall of the rear end of the sealing plug 8; an oil guide hole 10 is formed in the side wall of the sealing plug 8 in a penetrating mode, and an oil inlet port of the oil guide hole 10 is in butt joint with an oil outlet port of the retraction oil injection hole 5; a locking nut 11 is processed on the inner side wall of the sealing plug 8; the locking nut 11 is connected with an internal piston rod 12 through threads; the built-in piston rod adopts a fixed installation mode; a built-in piston rod cavity 13 is formed in the built-in piston rod 12; the outer side wall of the front end of the built-in piston rod 12 is symmetrically provided with oil return holes 14 in a penetrating way; the front end of the built-in piston rod 12 is connected with a squeezing ring 15; the outer side wall of the extrusion ring 15 is sleeved with an extrusion ring sealing ring 16 at intervals; a self-locking piston rod 17 is fitted and arranged in the cylinder inner cavity 2, and the self-locking piston rod 17 is sleeved on the outer side wall of the built-in piston rod 12; the self-locking piston rod adopts a sliding sleeve mounting mode; a self-locking piston rod cavity 18 is formed in the self-locking piston rod 17; the outer side wall of the rear end of the self-locking piston rod 17 is embedded with a self-locking piston rod outer guide ring 19 and a self-locking piston rod inner guide ring 20 at intervals; the inner side wall of the rear end of the self-locking piston rod 17 is embedded with a self-locking piston rod inner guide ring 21 and a self-locking piston rod inner sealing ring 22 at intervals; the front end port of the cylinder body 1 is connected with a positioning guide sleeve 23 through threads; the outer side wall of the self-locking piston rod 17 is provided with a trapezoidal thread 24; the self-locking piston rod 17 is connected with a trapezoidal self-locking nut 25 through a trapezoidal thread 24; the front port of the self-locking piston rod 17 is connected with a connector 26 through threads; the extended oil filling hole 3 and the retracted oil filling hole 5 are connected with an external hydraulic oil filling cylinder through pipelines.
When an object needs to be supported, hydraulic oil is injected into the cylinder body inner cavity 2 through extending out of the oil injection hole 3, the self-locking piston rod 17 extends forwards under the pushing of the hydraulic oil, and simultaneously the trapezoidal self-locking nut 25 is driven to extend out together, so that the connector 26 supports the object, when the object is supported, in order to avoid the leakage or backflow of the hydraulic oil and influence on the supporting effect of the connector, the trapezoidal self-locking nut 25 can be attached to the positioning guide sleeve 23 through the knob; when the self-locking piston rod 17 needs to return after the support is finished, the trapezoidal self-locking nut 25 is adjusted to the uppermost end of the self-locking piston rod 17, then hydraulic oil is injected into the retraction oil injection hole 5, and the hydraulic oil enters the self-locking piston rod cavity 18 through the retraction oil injection hole 5, the oil guide hole 10, the built-in piston rod cavity 13 and the oil return hole 14 in sequence, so that the hydraulic oil extrudes the self-locking piston rod 17 to realize retraction.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A single-rod self-locking type double-acting hydraulic actuator is characterized in that: the cylinder comprises a cylinder body (1), wherein a cylinder body inner cavity (2) is formed in the cylinder body (1) in a processing mode; the outer side wall of the cylinder body (1) is provided with an extended oil filling hole (3) in a run-through mode, and an oil outlet port extending out of the oil filling hole (3) is communicated with the inner cavity (2) of the cylinder body; the rear end opening of the cylinder body (1) is provided with a bottom end cover (4) through threaded connection; a retraction oil filling hole (5) is formed in the outer side wall of the bottom end cover (4) in a penetrating mode; an end cover inner sealing ring (6) is embedded into the inner side wall of the front end of the bottom end cover (4) at intervals; an end cover outer sealing ring (7) is embedded in the outer side wall of the front end of the bottom end cover (4); the rear end opening of the bottom end cover (4) is connected with a sealing plug (8) through threads; the outer side wall of the rear end of the sealing plug (8) is embedded with a plug sealing ring (9); an oil guide hole (10) is formed in the side wall of the sealing plug (8) in a penetrating mode, and an oil inlet port of the oil guide hole (10) is connected with an oil outlet port of the retraction oil injection hole (5) in a butt mode; a locking nut (11) is machined on the inner side wall of the sealing plug (8); the locking nut (11) is connected with an internal piston rod (12) through threads; a built-in piston rod cavity (13) is formed in the built-in piston rod (12); the outer side wall of the front end of the built-in piston rod (12) is symmetrically provided with oil return holes (14) in a penetrating way; the front end of the built-in piston rod (12) is connected with a squeezing ring (15); the outer side wall of the extrusion ring (15) is sleeved with an extrusion ring sealing ring (16) at intervals; a self-locking piston rod (17) is installed in the cylinder inner cavity (2) in a fit manner, and the self-locking piston rod (17) is sleeved on the outer side wall of the built-in piston rod (12); a self-locking piston rod cavity (18) is formed in the self-locking piston rod (17); the outer side wall of the rear end of the self-locking piston rod (17) is embedded with a self-locking piston rod outer guide ring (19) and a self-locking piston rod inner guide ring (20) at intervals; and the inner side wall of the rear end of the self-locking piston rod (17) is embedded with a self-locking piston rod inner guide ring (21) and a self-locking piston rod inner sealing ring (22) at intervals.
2. The single-rod self-locking double-acting hydraulic actuator according to claim 1, wherein: the front end opening of the cylinder body (1) is connected with a positioning guide sleeve (23) through threads.
3. The single-rod self-locking double-acting hydraulic actuator according to claim 1, wherein: the outer side wall of the self-locking piston rod (17) is provided with a trapezoidal thread (24); the self-locking piston rod (17) is connected with a trapezoidal self-locking nut (25) through a trapezoidal thread (24).
4. The single-rod self-locking double-acting hydraulic actuator according to claim 1, wherein: the front port of the self-locking piston rod (17) is connected with a connector (26) through threads.
5. The single-rod self-locking double-acting hydraulic actuator according to claim 1, wherein: the extension oil filling hole (3) and the retraction oil filling hole (5) are connected with an external hydraulic oil filling cylinder through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461368.4A CN114151408A (en) | 2021-12-03 | 2021-12-03 | Single-rod self-locking type double-acting hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111461368.4A CN114151408A (en) | 2021-12-03 | 2021-12-03 | Single-rod self-locking type double-acting hydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151408A true CN114151408A (en) | 2022-03-08 |
Family
ID=80455917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111461368.4A Pending CN114151408A (en) | 2021-12-03 | 2021-12-03 | Single-rod self-locking type double-acting hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151408A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307788A (en) * | 2008-06-23 | 2008-11-19 | 上海耐斯特液压设备有限公司 | Ultra-high hydraulic double-acting mechanical locking oil cylinder |
| CN202451500U (en) * | 2012-02-17 | 2012-09-26 | 山东众力液压技术有限公司 | Ultrahigh pressure mechanical self-locking hydraulic cylinder |
| CN103883581A (en) * | 2014-03-25 | 2014-06-25 | 庄筱凤 | Integrated self-locking intelligent informationized hydraulic cylinder device |
| CN204357821U (en) * | 2014-11-21 | 2015-05-27 | 安徽理工大学 | A kind of mechanical self-locking hydraulic cylinder |
| CN205331111U (en) * | 2015-12-18 | 2016-06-22 | 蓬莱巨涛海洋工程重工有限公司 | Servo superhigh pressure of two effects is from locking -type pneumatic cylinder |
| CN107035742A (en) * | 2017-06-21 | 2017-08-11 | 张多艳 | A kind of novel hydraulic cylinder |
| CN210236969U (en) * | 2019-04-22 | 2020-04-03 | 武汉隆立洋液压工程有限公司 | Double-acting mechanical self-locking hydraulic jack |
| CN210889560U (en) * | 2019-08-16 | 2020-06-30 | 上海深拓液压技术有限公司 | Take self-locking function's landing leg hydro-cylinder |
| EP3708853A1 (en) * | 2019-03-11 | 2020-09-16 | Goodrich Corporation | Retention systems for light weight actuator glands |
| CN111765144A (en) * | 2020-08-05 | 2020-10-13 | 马鞍山市裕华机械制造有限公司 | Self-locking type multi-cavity hydraulic oil cylinder and implementation method thereof |
| CN212403321U (en) * | 2020-06-23 | 2021-01-26 | 杜恩武汉机械有限公司 | Double-acting self-locking hydraulic jack |
| CN212455040U (en) * | 2020-06-05 | 2021-02-02 | 江苏军宏机械有限公司 | Large-diameter jack cylinder with external mechanical lock |
| CN214247860U (en) * | 2021-01-08 | 2021-09-21 | 大连诺美液压件有限公司 | Hydraulic cylinder with self-locking function |
-
2021
- 2021-12-03 CN CN202111461368.4A patent/CN114151408A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307788A (en) * | 2008-06-23 | 2008-11-19 | 上海耐斯特液压设备有限公司 | Ultra-high hydraulic double-acting mechanical locking oil cylinder |
| CN202451500U (en) * | 2012-02-17 | 2012-09-26 | 山东众力液压技术有限公司 | Ultrahigh pressure mechanical self-locking hydraulic cylinder |
| CN103883581A (en) * | 2014-03-25 | 2014-06-25 | 庄筱凤 | Integrated self-locking intelligent informationized hydraulic cylinder device |
| CN204357821U (en) * | 2014-11-21 | 2015-05-27 | 安徽理工大学 | A kind of mechanical self-locking hydraulic cylinder |
| CN205331111U (en) * | 2015-12-18 | 2016-06-22 | 蓬莱巨涛海洋工程重工有限公司 | Servo superhigh pressure of two effects is from locking -type pneumatic cylinder |
| CN107035742A (en) * | 2017-06-21 | 2017-08-11 | 张多艳 | A kind of novel hydraulic cylinder |
| EP3708853A1 (en) * | 2019-03-11 | 2020-09-16 | Goodrich Corporation | Retention systems for light weight actuator glands |
| CN210236969U (en) * | 2019-04-22 | 2020-04-03 | 武汉隆立洋液压工程有限公司 | Double-acting mechanical self-locking hydraulic jack |
| CN210889560U (en) * | 2019-08-16 | 2020-06-30 | 上海深拓液压技术有限公司 | Take self-locking function's landing leg hydro-cylinder |
| CN212455040U (en) * | 2020-06-05 | 2021-02-02 | 江苏军宏机械有限公司 | Large-diameter jack cylinder with external mechanical lock |
| CN212403321U (en) * | 2020-06-23 | 2021-01-26 | 杜恩武汉机械有限公司 | Double-acting self-locking hydraulic jack |
| CN111765144A (en) * | 2020-08-05 | 2020-10-13 | 马鞍山市裕华机械制造有限公司 | Self-locking type multi-cavity hydraulic oil cylinder and implementation method thereof |
| CN214247860U (en) * | 2021-01-08 | 2021-09-21 | 大连诺美液压件有限公司 | Hydraulic cylinder with self-locking function |
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