CN117450133B - Buffering hydraulic cylinder - Google Patents
Buffering hydraulic cylinder Download PDFInfo
- Publication number
- CN117450133B CN117450133B CN202311717843.9A CN202311717843A CN117450133B CN 117450133 B CN117450133 B CN 117450133B CN 202311717843 A CN202311717843 A CN 202311717843A CN 117450133 B CN117450133 B CN 117450133B
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- Prior art keywords
- cylinder body
- buffer
- piston rod
- plug
- cylinder
- 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.)
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- 230000003139 buffering effect Effects 0.000 title claims description 9
- 239000000872 buffer Substances 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims description 33
- 239000012530 fluid Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 239000010720 hydraulic oil Substances 0.000 abstract description 25
- 230000033001 locomotion Effects 0.000 abstract description 8
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000004308 accommodation Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
-
- 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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a buffer hydraulic cylinder, which belongs to the technical field of hydraulic cylinders and solves the problems of poor buffer property, poor sealing property and easy damage in the prior art. According to the invention, through compression of the spring and extension of the tension spring, the buffer effect on the load transmitted by the piston rod is realized, the damage to the cylinder body caused by using hydraulic oil as a buffer medium is avoided, the tightness of the cylinder body is improved, and the cylinder body damage caused by overlarge instant acting force of the piston rod is effectively prevented through synchronous movement of the movable piston rod and the buffer.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a buffer hydraulic cylinder.
Background
Hydraulic cylinders are important actuators in hydraulic systems. The hydraulic cylinder can convert hydraulic energy into mechanical energy and is matched with various transmission mechanisms to complete various mechanical movements. The hydraulic cylinder has the characteristics of simple structure, large output force, stable and reliable performance and the like. When the existing buffer hydraulic cylinder works, hydraulic oil is injected into one side of the piston, so that the overall pressure of the hydraulic oil at the side is increased, the piston moves towards the other side, and the hydraulic oil at the other side of the piston is extruded. The piston rod is buffered by hydraulic damping of hydraulic oil in the extending and retracting process. However, when the load borne by the piston rod suddenly increases, the buffer effect of the hydraulic oil on the piston rod is low, and the hydraulic cylinder is easy to damage.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the buffer hydraulic cylinder which has good buffer property, good sealing property and difficult damage.
In order to achieve the technical purpose, the buffer hydraulic cylinder adopts the following technical scheme:
the utility model provides a buffering pneumatic cylinder, includes cylinder body, piston rod and activity stopper, the activity stopper adaptation is in slip in the cylinder body and push-and-pull the piston rod, be equipped with first hydraulic fluid port and second hydraulic fluid port on the cylinder body, first hydraulic fluid port and second hydraulic fluid port are located the both sides of activity stopper respectively, the tip of piston rod is equipped with the connecting rod, the connecting rod with the coaxial setting and fixed connection of piston rod, the connecting rod wears to establish in the activity stopper, the outside of connecting rod is rotated and is equipped with first nut, still be equipped with the baffle in the cylinder body, wear to be equipped with the movable rod on the baffle, the connecting rod is towards one side of baffle is equipped with the accommodation hole, be equipped with the spring in the accommodation hole, the tip of movable rod penetrate the accommodation hole and with spring coupling.
Preferably, the second oil port is located between the movable plug and the partition board, and the partition board is fixedly arranged in the cylinder body.
Preferably, one end of the spring is fixedly connected with the bottom of the accommodating hole, and the other end of the spring is fixedly connected with the end part of the movable rod.
Preferably, the sealing sleeve is arranged on the partition board and is I-shaped, one side of the sealing sleeve is attached to the outer wall of one side of the partition board, the other end of the sealing sleeve is attached to the outer wall of the other side of the partition board, the movable rod penetrates through the sealing sleeve, and the outer wall of the movable rod is in sliding connection with the inner wall of the sealing sleeve.
Preferably, a buffer plug is further arranged in the cylinder body, the buffer plug is arranged between the partition plate and the cylinder bottom of the cylinder body, the outer wall of the buffer plug is attached to the inner wall of the cylinder body, the movable rod penetrates through the buffer plug and is locked through a second nut, a third oil port is further formed in the cylinder body, and the third oil port is located between the buffer plug and the cylinder bottom of the cylinder body.
Preferably, one side of the baffle towards the buffer plug and one side of the buffer plug towards the baffle are both provided with a supporting sleeve, a tension spring is arranged between a pair of supporting sleeves, one end of the tension spring is fixedly connected with the baffle and sleeved on the outer side of one supporting sleeve, and the other end of the tension spring is fixedly connected with the buffer plug and sleeved on the outer side of the other supporting sleeve.
Preferably, the stiffness coefficient of the tension spring is greater than the stiffness coefficient of the spring.
Preferably, a dustproof ring is arranged at the cylinder opening of the cylinder body, the piston rod penetrates through the dustproof ring and extends to the outer side of the cylinder body, and the first oil port is located between the dustproof ring and the movable plug.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, through compression of the spring and extension of the tension spring, the buffer effect of the piston rod for transferring load is realized, and the damage to the cylinder body caused by using hydraulic oil as a buffer medium is avoided; by means of the arrangement of the sealing sleeve, the movable rod is ensured to be always kept in sealing fit in the axial reciprocating movement process of the cylinder body, leakage of hydraulic oil is prevented, and the tightness of the cylinder body is improved; through the synchronous motion of activity and buffering, effectively prevent that the piston rod from causing the cylinder body to damage because of the excessive big of moment effort.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a diagram of the operation state of the present invention;
Fig. 3 is a second operational state diagram of the present invention.
In the figure: 1. a cylinder; 11. a first oil port; 12. a second oil port; 13. a third oil port; 2. a piston rod; 3. a movable plug; 4. a connecting rod; 41. a first nut; 42. an accommodation hole; 43. a spring; 5. a partition plate; 51. sealing sleeve; 52. a support sleeve; 6. a movable rod; 60. a second nut; 7. a buffer plug; 8. a tension spring; 9. a dust-proof ring.
Detailed Description
The invention is further described below with reference to the drawings and detailed description:
As shown in fig. 1-3, a buffer hydraulic cylinder comprises a cylinder body 1, a piston rod 2 and a movable plug 3, wherein the movable plug 3 slides in the cylinder body 1 in an adaptive manner and pushes and pulls the piston rod 2, a first oil port 11 and a second oil port 12 are arranged on the cylinder body 1, the first oil port 11 and the second oil port 12 are respectively positioned at two sides of the movable plug 3, a connecting rod 4 is arranged at the end part of the piston rod 2, the connecting rod 4 and the piston rod 2 are coaxially arranged and fixedly connected, the connecting rod 4 is penetrated in the movable plug 3, and a first nut 41 is screwed on the outer side of the connecting rod 4;
the cylinder body 1 is internally provided with a partition board 5, the partition board 5 is internally provided with a movable rod 6 in a penetrating way, one side of the connecting rod 4, which faces the partition board 5, is provided with a containing hole 42, a spring 43 is arranged in the containing hole 42, and the end part of the movable rod 6 penetrates into the containing hole 42 and is connected with the spring 43.
Hydraulic oil enters the cylinder body 1 through the second oil port 12, so that the oil pressure of the hydraulic oil on one side of the movable plug 3 (namely, between the movable plug 3 and the partition plate 5) is increased, the movable plug 3 is pushed to move towards the first oil port 11, the hydraulic oil on the other side of the movable plug 3 is discharged from the first oil port 11, namely, the first oil port 11 discharges oil and the second oil port 12 charges oil, the extension of the piston rod 2 can be realized, the first oil port 11 charges oil and the second oil port 12 discharges oil, and the retraction of the piston rod 2 can be realized. When the piston rod 2 bears the load, the piston rod 2, the connecting rod 4 and the movable plug 3 simultaneously generate a small amount of displacement towards the partition plate 5, and in the process, the spring 43 is compressed, and meanwhile, the movable plug 3 and hydraulic oil can generate interaction force, so that the buffer effect on the piston rod 2 is realized, and the damage to the cylinder body 1 caused by overlarge extrusion force between the movable plug 3 and the hydraulic oil is prevented.
The second oil port 12 is located between the movable plug 3 and the partition board 5, and the partition board 5 is fixedly arranged in the cylinder body 1. The fixed setting of baffle 5 has guaranteed that after the oil pressure of the hydraulic oil between activity stopper 3 and baffle 5 risees, the position of baffle 5 can not change, just so guaranteed also that at the moment of piston rod 2 transmission load, activity stopper 3 and connecting rod 4 can form the compression effect to spring 43, and in this process, the partial hydraulic oil between activity stopper 3 and the baffle 5 has been discharged from second hydraulic port 12, just also reduced the bulk pressure of hydraulic oil, thereby realize quick pressure release, avoided the pressure of hydraulic oil too big and cause cylinder body 1 to break.
One end of the spring 43 is fixedly connected with the bottom of the accommodating hole 42, and the other end of the spring 43 is fixedly connected with the end of the movable rod 6. In this way, in the process that the piston rod 2 drives the connecting rod 4 and the movable plug 3 to displace, and when the connecting rod 4 moves towards the direction of the partition plate 5 and the piston rod 2 is in a retracted state, the spring 43 can be reliably compressed, so that the load born by the piston rod 2 is transferred, and a sufficient space is reserved for discharging hydraulic oil.
The sealing sleeve 51 is arranged on the partition board 5, the sealing sleeve 51 is I-shaped, one side of the sealing sleeve 51 is attached to the outer wall of one side of the partition board 5, the other end of the sealing sleeve 51 is attached to the outer wall of the other side of the partition board 5, the movable rod 6 is arranged in the sealing sleeve 51 in a penetrating mode, and the outer wall of the movable rod 6 is in sliding connection with the inner wall of the sealing sleeve 51.
The provision of the sealing sleeve 51 ensures that the hydraulic oil does not pass through the partition 5 during the reciprocating movement of the movable rod 6 in the axial direction of the cylinder 1. Further, the sealing sleeve 51 is in an i shape, so that the connection tightness with the partition plate 5 can be improved, the sealing sleeve 51 still keeps a close fitting state with the partition plate 5 in the reciprocating movement process of the movable rod 6, the movement stability of the movable rod 6 is ensured, and meanwhile, the leakage of hydraulic oil at the partition plate 5 is prevented.
The cylinder body 1 is internally provided with a buffer plug 7, the buffer plug 7 is arranged between the partition board 5 and the cylinder bottom of the cylinder body 1, the outer wall of the buffer plug 7 is attached to the inner wall of the cylinder body 1, the movable rod 6 penetrates through the buffer plug 7 and is locked through the second nut 60, the cylinder body 1 is further provided with a third oil port 13, and the third oil port 13 is positioned between the buffer plug 7 and the cylinder bottom of the cylinder body 1.
There is no hydraulic oil between the buffer plug 7 and the partition board 5, after the spring 43 is completely compressed, the piston rod 2, the movable plug 3 and the buffer plug 7 can generate synchronous motion, so that the extrusion action of the buffer plug 7 on the hydraulic oil between the buffer plug 7 and the cylinder bottom of the cylinder body 1 is realized, the buffer action of the movable plug 3 and the piston rod 2 is realized again, the piston rod 2 is ensured to reliably extend or retract, and the cylinder body 1 or the piston rod 2 is effectively prevented from being damaged due to overlarge instantaneous acting force of the piston rod 2 to the hydraulic oil transmission.
One side of the baffle 5 facing the buffer plug 7 and one side of the buffer plug 7 facing the baffle 5 are respectively provided with a support sleeve 52, a tension spring 8 is arranged between a pair of support sleeves 52, one end of the tension spring 8 is fixedly connected with the baffle 5 and sleeved on the outer side of one support sleeve 52, and the other end of the tension spring 8 is fixedly connected with the buffer plug 7 and sleeved on the outer side of the other support sleeve 52.
Because the piston rod 2 and the buffer plug 7 are fixedly connected, when the piston rod 2 bears load and generates displacement, the deformation of the spring 43 can absorb a part of load, and a part of load can be transferred through the deformation of the tension spring 8, that is, the buffer effect on the piston rod 2 is effectively improved under the compression of the spring 43 and the stretching effect of the tension spring 8. Further, by providing the support sleeve 52, the limiting function on the tension spring 8 can be achieved, and the tension spring 8 can be reliably reset while the tension spring 8 is not affected to stretch.
The stiffness coefficient of the tension spring 8 is larger than the stiffness coefficient of the spring 43. That is, the spring 43 is more easily deformed relative to the tension spring 8, so that the first-stage buffering action can be realized by compressing the spring 43, and the second-stage buffering action can be realized by stretching the tension spring 8, and under the combined action of the spring 43 and the tension spring 8, the reliable buffering action of the piston rod 2 is ensured, and the piston rod 2 and the cylinder body 1 are ensured not to be damaged.
The cylinder body 1 is provided with a dustproof ring 9 at a cylinder opening, the piston rod 2 penetrates through the dustproof ring 9 and extends to the outer side of the cylinder body 1, and the first oil opening 11 is located between the dustproof ring 9 and the movable plug 3. The setting of dust ring 9 can prevent that outside dust from entering into in the cylinder body 1, just can prevent also that the dust from causing the pollution to hydraulic oil, has ensured that can closely laminate between activity stopper 3 and cylinder body 1 and buffering stopper 7 and the cylinder body 1, and can not appear the mar because of the friction of dust realizes on the cylinder body 1, just also has ensured that hydraulic oil can not take place to leak, can realize the drive effect to piston rod 2 reliably.
In summary, the present invention is not limited to the preferred embodiments, but includes all equivalent changes and modifications in shape, construction, characteristics and spirit according to the scope of the claims.
Claims (4)
1. The utility model provides a buffering pneumatic cylinder, includes cylinder body, piston rod and activity stopper, the activity stopper adaptation is in slip in the cylinder body and push-and-pull the piston rod, be equipped with first hydraulic fluid port and second hydraulic fluid port on the cylinder body, first hydraulic fluid port and second hydraulic fluid port are located the both sides of activity stopper respectively, its characterized in that: the end part of the piston rod is provided with a connecting rod which is coaxially arranged with the piston rod and fixedly connected with the piston rod, the connecting rod penetrates through the movable plug, a first nut is arranged on the outer side of the connecting rod in a rotating mode, a partition plate is further arranged in the cylinder body, the movable rod penetrates through the partition plate, one side, facing the partition plate, of the connecting rod is provided with a containing hole, a spring is arranged in the containing hole, and the end part of the movable rod penetrates through the containing hole and is connected with the spring;
the second oil port is positioned between the movable plug and the partition plate, and the partition plate is fixedly arranged in the cylinder body;
The cylinder body is internally provided with a buffer plug, the buffer plug is arranged between the partition plate and the cylinder bottom of the cylinder body, the outer wall of the buffer plug is attached to the inner wall of the cylinder body, the movable rod penetrates through the buffer plug and is locked by a second nut, the cylinder body is also provided with a third oil port, and the third oil port is arranged between the buffer plug and the cylinder bottom of the cylinder body;
One side of the baffle facing the buffer plug and one side of the buffer plug facing the baffle are respectively provided with a support sleeve, a tension spring is arranged between a pair of support sleeves, one end of the tension spring is fixedly connected with the baffle and sleeved on the outer side of one support sleeve, and the other end of the tension spring is fixedly connected with the buffer plug and sleeved on the outer side of the other support sleeve;
the stiffness coefficient of the tension spring is larger than that of the spring.
2. The cushion hydraulic cylinder according to claim 1, wherein: one end of the spring is fixedly connected with the bottom of the accommodating hole, and the other end of the spring is fixedly connected with the end part of the movable rod.
3. The cushion hydraulic cylinder according to claim 1, wherein: the sealing sleeve is arranged on the partition board and is I-shaped, one side of the sealing sleeve is attached to the outer wall of one side of the partition board, the other end of the sealing sleeve is attached to the outer wall of the other side of the partition board, the movable rod is arranged in the sealing sleeve in a penetrating mode, and the outer wall of the movable rod is connected with the inner wall of the sealing sleeve in a sliding mode.
4. A buffer cylinder according to any one of claims 1-3, characterized in that: the cylinder opening of the cylinder body is provided with a dustproof ring, the piston rod penetrates through the dustproof ring and extends to the outer side of the cylinder body, and the first oil opening is located between the dustproof ring and the movable plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311717843.9A CN117450133B (en) | 2023-12-13 | 2023-12-13 | Buffering hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311717843.9A CN117450133B (en) | 2023-12-13 | 2023-12-13 | Buffering hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117450133A CN117450133A (en) | 2024-01-26 |
| CN117450133B true CN117450133B (en) | 2024-07-16 |
Family
ID=89582164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311717843.9A Active CN117450133B (en) | 2023-12-13 | 2023-12-13 | Buffering hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117450133B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211693049U (en) * | 2020-02-25 | 2020-10-16 | 邓林聪 | Bidirectional oil cylinder |
| CN112628239A (en) * | 2020-12-25 | 2021-04-09 | 扬州市正浩液压机械设备有限公司 | High-performance hydraulic oil cylinder with bidirectional buffering function and working method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10249509A1 (en) * | 2002-10-23 | 2004-05-13 | Bar Pneumatische Steuerungssysteme Gmbh | Pneumatic actuator |
| DE102010018931A1 (en) * | 2010-04-30 | 2011-11-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Hydraulic cylinder for roll stabilization device of motor vehicle, has piston which is movable against end stop, where damping element is movably arranged in annular space of working chamber |
| CN202038128U (en) * | 2011-04-12 | 2011-11-16 | 中国人民解放军总装备部军械技术研究所 | Two-way buffering traction device |
| CN104358735B (en) * | 2014-10-22 | 2016-08-24 | 湖州环丰机械有限公司 | A kind of lifting hydraulic jack |
| CN210637313U (en) * | 2019-08-27 | 2020-05-29 | 无锡市汇宏液压气动有限公司 | Pressure cylinder with adjustable degree of depth |
| CN111022417A (en) * | 2019-11-05 | 2020-04-17 | 扬州市卓瑞液压装备科技有限公司 | Buffering hydraulic cylinder |
| CN212429609U (en) * | 2020-04-18 | 2021-01-29 | 单世铭 | Agricultural machine damping coupling mechanism |
| CN113374757B (en) * | 2021-08-16 | 2021-11-02 | 招远华丰机械设备有限公司 | Mining equipment hydraulic cylinder with protection device |
-
2023
- 2023-12-13 CN CN202311717843.9A patent/CN117450133B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211693049U (en) * | 2020-02-25 | 2020-10-16 | 邓林聪 | Bidirectional oil cylinder |
| CN112628239A (en) * | 2020-12-25 | 2021-04-09 | 扬州市正浩液压机械设备有限公司 | High-performance hydraulic oil cylinder with bidirectional buffering function and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117450133A (en) | 2024-01-26 |
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