CN117469232A - Multistage hydraulic cylinder with buffering effect - Google Patents
Multistage hydraulic cylinder with buffering effect Download PDFInfo
- Publication number
- CN117469232A CN117469232A CN202311528020.1A CN202311528020A CN117469232A CN 117469232 A CN117469232 A CN 117469232A CN 202311528020 A CN202311528020 A CN 202311528020A CN 117469232 A CN117469232 A CN 117469232A
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- Prior art keywords
- cylinder
- piston rod
- piston
- oil
- valve core
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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.)
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 103
- 239000010720 hydraulic oil Substances 0.000 description 48
- 238000007599 discharging Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of hydraulic cylinders and discloses a multistage hydraulic cylinder with a buffering effect, which comprises an outer cylinder barrel, wherein an inner cylinder barrel is connected inside the outer cylinder barrel in a sliding manner, a piston member is connected inside the inner cylinder barrel in a sliding manner, the front end of the piston member is fixedly connected with a piston rod, one end of the piston rod, which is far away from the piston member, penetrates through the front end of the inner cylinder barrel, the periphery of the front end of the piston rod is connected with a cylinder cover in a sliding manner, the cylinder cover is fixedly connected with the inner wall of the inner cylinder barrel, a supporting ring is arranged on the inner wall of the cylinder cover, and an oil inlet assembly is arranged inside the piston rod. The hydraulic cylinder can extend and buffer under the action of the large cavity oil port, the liquid passing pipe, the one-way valve core, the piston rod, the small cavity oil return hole I, the small cavity oil return hole II, the small cavity oil port and the supporting ring, and can retract and buffer under the action of the small cavity oil port, the piston rod, the liquid passing pipe, the large cavity oil port, the one-way valve core and the valve core bolt.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a multistage hydraulic cylinder with a buffering function.
Background
The large mining wide dump truck can generate great inertial impact during unloading due to the great carriage weight, the dumper accident and impact noise are extremely easy to cause, the existing hydraulic cylinder with buffer is generally of a single-stage structure, and a buffer cavity, an oil way, a throttle valve, a check valve and the like are arranged at the bottom of the cylinder or on an end cover, so that the end cover has large volume, complex structure, difficult processing, high cost and inconvenient installation, debugging and maintenance, and the structure cannot be used on the double-acting multistage hydraulic cylinder.
In order to solve the problem, the application provides a double-acting multistage hydraulic cylinder with buffering at two ends, so that inertial impact and mechanical impact caused by piston inertial force and hydraulic force at the end of travel of the hydraulic cylinder are avoided, and the problem that noise is generated by unloading inertial rollover and dumper carriage collision frames of large-scale mining dumpers is solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multi-stage hydraulic cylinder with a buffering function, and solves the problems that the hydraulic cylinder with the buffering function is generally of a single-stage structure and cannot be used on a double-acting multi-stage hydraulic cylinder in the traditional method.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a multistage hydraulic cylinder with cushioning effect, includes outer cylinder, outer cylinder is inside to be connected with interior cylinder by sliding, sliding connection has the piston spare in the interior cylinder, piston spare front end fixedly connected with piston rod, piston rod keeps away from piston spare one end and runs through interior cylinder front end, piston rod front end periphery sliding connection has the cylinder cap, the cylinder cap with interior cylinder inner wall fixed connection, the cylinder cap inner wall is provided with the holding ring, be provided with the oil feed subassembly in the piston rod.
Through the technical scheme, when hydraulic oil enters the large cavity of the oil cylinder, the inner cylinder barrel and the piston rod can be respectively pushed to extend outwards under the action of hydraulic oil pressure, and when the piston rod extends outwards to the tail end of a stroke, the supporting ring can seal the small cavity oil return hole II, so that oil discharge interception is realized, and the flow of the hydraulic oil in the oil cylinder is limited.
Preferably, the cylinder bottom is fixedly connected with the rear end of the outer cylinder, the spring seat is fixedly connected with the middle part of the front end of the cylinder bottom, the spring seat front end is fixedly connected with a spring piece, the front end of the spring piece is fixedly connected with a unidirectional valve core, the middle part of the unidirectional valve core is penetrated with a valve core bolt, and the rear end of the valve core bolt penetrates into the cylinder bottom.
Through the technical scheme, when the oil cylinder is retracted, hydraulic oil enters the small cavity of the hydraulic cylinder from the small cavity oil port, the piston rod and the inner sleeve are pushed to retract, hydraulic oil in the large cavity is discharged into the oil cylinder from the large cavity oil port through the liquid passing pipe, when the oil cylinder is retracted to the tail end of the stroke, the liquid passing pipe is blocked by the one-way valve core, hydraulic oil can only be discharged from the small hole in the valve core bolt and the gap between the one-way valve core and the valve core bolt, the oil discharge channel of the large cavity is reduced, the oil discharge interception is realized, the flow of hydraulic oil in the oil cylinder is limited, and the speed reduction when the hydraulic oil cylinder is retracted is realized, so that the purpose of retraction and buffering of the hydraulic oil cylinder is achieved.
Preferably, the oil inlet assembly comprises a large cavity oil port, one end of the large cavity oil port is arranged at the front end of the piston rod, the other end of the large cavity oil port penetrates to the inner front end of the piston rod and is communicated with a liquid through pipe, the liquid through pipe penetrates to the rear end of the piston rod, one end of a small cavity oil port is arranged at the front end of the piston rod, the other end of the small cavity oil port penetrates to the inner front end of the piston rod, and a first small cavity oil return hole and a second small cavity oil return hole are sequentially arranged at the periphery of the rear end of the piston rod from back to front.
Through the technical scheme, when hydraulic oil flows through the liquid through pipe from the large cavity oil port to push the one-way valve core to enter the large cavity of the oil cylinder to push the piston rod of the inner sleeve of the oil cylinder to extend outwards, hydraulic oil in the small cavity flows through the small cavity oil port from the small cavity oil return hole I and the small cavity oil return hole II to be discharged into the oil cylinder, and therefore the oil cylinder can extend outwards.
Preferably, the front end of the liquid through pipe adopts an eccentric structure.
Through the technical scheme, the stability of the oil cylinder is guaranteed in the process of inputting and outputting the hydraulic oil, and meanwhile, the influence on the entering and the discharging of the hydraulic oil from the small cavity oil port can be prevented.
Preferably, the front end is provided with the sealing washer two in the outer cylinder, interior cylinder rear end periphery is provided with the sealing washer one, piston spare periphery is provided with the sealing washer three.
Through above-mentioned technical scheme, can increase the whole leakproofness of device through sealing washer one, sealing washer two and sealing washer three under the combined action, prevent that hydraulic oil from leaking in the jar to keep in-cylinder pressure.
Preferably, the front end is provided with the dust ring in the outer cylinder barrel, and the dust ring is arranged at the front side of the sealing ring II.
Through above-mentioned technical scheme, through being provided with the dust ring, can prevent effectively that dust from getting into inside the hydro-cylinder.
Preferably, the inner wall of the supporting ring is attached to the periphery of the piston rod.
Through the technical scheme, when the small cavity oil return hole II moves to the supporting ring, the small cavity oil return hole II can be effectively closed through the supporting ring.
Preferably, the spring member is disposed on the outer periphery of the spool bolt.
Through above-mentioned technical scheme, through setting up the spring spare at case bolt periphery, can guarantee the axiality of two components, also can prevent simultaneously that the spring spare from bending after the pressurized.
Working principle: when the oil cylinder extends outwards, hydraulic oil flows through the liquid through pipe to push the one-way valve core to enter the large oil cylinder cavity to push the piston rod of the inner oil cylinder sleeve to extend outwards, hydraulic oil in the small cavity flows through the small cavity oil through holes I and II to be discharged into the oil cylinder, when the piston rod extends outwards to the end of the stroke, the small cavity oil through holes II can be blocked by the support ring, oil is discharged only by the small cavity oil through holes I, an oil discharge channel of the small cavity is reduced, oil discharge interception is realized, the flow of hydraulic oil discharged into the oil cylinder is limited, and the speed reduction when the oil cylinder extends outwards is realized, so that the aim of outwards buffering of the hydraulic oil cylinder is achieved; when the oil cylinder is retracted, hydraulic oil enters the small cavity of the hydraulic cylinder from the small cavity oil port, the piston rod and the inner sleeve are pushed to retract, hydraulic oil in the large cavity flows through the large cavity oil port to be discharged into the oil cylinder from the liquid passing pipe, when the oil cylinder is retracted to the end of the stroke, the liquid passing pipe is blocked by the one-way valve core, hydraulic oil can only be discharged from the small hole in the valve core bolt and the gap between the one-way valve core and the valve core bolt, the oil discharge channel of the large cavity is reduced, the oil discharge interception is realized, the flow of hydraulic oil in the oil cylinder is limited, and the speed reduction when the hydraulic oil cylinder is retracted is realized, so that the purpose of retraction buffering of the hydraulic oil cylinder is achieved.
The invention provides a multistage hydraulic cylinder with a buffering function. The beneficial effects are as follows:
1. according to the hydraulic oil cylinder, under the combined action of the large cavity oil port, the liquid passing pipe, the one-way valve core, the piston rod, the small cavity oil return hole I, the small cavity oil return hole II, the small cavity oil port and the support ring, the oil discharging channel of the small cavity is reduced, the oil discharging interception is realized, the flow of hydraulic oil in the oil cylinder is limited, and the speed reduction when the hydraulic oil cylinder extends outwards is realized, so that the aim of the hydraulic oil cylinder extending and buffering is fulfilled.
2. According to the hydraulic oil cylinder retraction buffer device, under the combined action of the small cavity oil port, the piston rod, the liquid passing pipe, the large cavity oil port, the one-way valve core and the valve core bolt, the oil discharging channel of the large cavity is reduced, the oil discharging interception is realized, the flow of hydraulic oil in the oil cylinder is limited, and the speed reduction during the retraction of the hydraulic oil cylinder is realized, so that the purpose of the retraction buffer of the hydraulic oil cylinder is achieved.
Drawings
FIG. 1 is a retracted cross-sectional view of the present invention;
FIG. 2 is an extended cross-sectional view of the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
fig. 4 is an enlarged view at B in fig. 2.
Wherein, 1, the outer cylinder; 2. a cylinder bottom; 3. a cylinder cover; 4. a large cavity oil port; 5. a small cavity oil port; 6. a small cavity oil return hole I; 7. a small cavity oil return hole II; 8. a one-way valve core; 9. a piston member; 10. a piston rod; 11. an inner cylinder; 12. a first sealing ring; 13. a support ring; 14. a dust ring; 15. a second sealing ring; 16. a spring seat; 17. a spring member; 18. a valve core bolt; 19. a liquid pipe; 20. and a sealing ring III.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, 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.
Examples:
referring to fig. 1-4, an embodiment of the present invention provides a multi-stage hydraulic cylinder with a buffering function, which comprises an outer cylinder 1, an inner cylinder 11 slidably connected inside the outer cylinder 1, a piston member 9 slidably connected inside the inner cylinder 11, a piston rod 10 fixedly connected to the front end of the piston member 9, one end of the piston rod 10 far away from the piston member 9 penetrating through the front end of the inner cylinder 11, a cylinder cover 3 slidably connected to the periphery of the front end of the piston rod 10, the cylinder cover 3 fixedly connected to the inner wall of the inner cylinder 11, a supporting ring 13 provided on the inner wall of the cylinder cover 3, and an oil inlet assembly provided in the piston rod 10; the oil inlet assembly comprises a large cavity oil port 4, one end of the large cavity oil port 4 is arranged at the front end of the piston rod 10, the other end of the large cavity oil port 4 penetrates through the front end in the piston rod 10 and is communicated with a liquid through pipe 19, the liquid through pipe 19 penetrates through the rear end of the piston rod 10, the front end of the piston rod 10 is provided with a small cavity oil port 5, the other end of the small cavity oil port 5 penetrates through the front end in the piston rod 10, and the periphery of the rear end of the piston rod 10 is provided with a small cavity oil return hole I6 and a small cavity oil return hole II 7 in sequence from back to front;
when the oil cylinder extends outwards, hydraulic oil can flow through the liquid passing pipe 19 through the large cavity oil port 4 and push the one-way valve core 8 to be far away from the liquid passing pipe 19, so that the hydraulic oil can enter the large oil cylinder cavity in the outer cylinder barrel 1, the inner cylinder barrel 11, the piston piece 9 and the piston rod 10 in the oil cylinder can be pushed to extend outwards, hydraulic oil in a small cavity formed by the piston rod 10 and the inner cylinder barrel 11 can flow through the small cavity oil port 5 to be discharged into the oil cylinder through the small cavity oil return hole I6 and the small cavity oil return hole II 7, when the piston rod 10 extends outwards to the end of a stroke, the small cavity oil return hole II can be blocked by the supporting ring 13 and is only used for discharging oil by the small cavity oil return hole I6, the oil discharging channel of the small cavity is reduced, the flow of the hydraulic oil discharged from the oil cylinder is limited, the speed is reduced when the hydraulic oil cylinder extends outwards, and the purpose of the hydraulic oil cylinder is achieved, and the hydraulic oil cylinder extends outwards is buffered.
The rear end of the outer cylinder barrel 1 is fixedly connected with a cylinder bottom 2, the middle part of the front end of the cylinder bottom 2 is fixedly connected with a spring seat 16, the front end of the spring seat 16 is fixedly connected with a spring piece 17, the front end of the spring piece 17 is fixedly connected with a one-way valve core 8, the middle part of the one-way valve core 8 is penetrated with a valve core bolt 18, and the rear end of the valve core bolt 18 penetrates into the cylinder bottom 2;
when the oil cylinder is retracted, hydraulic oil can enter the small cavity of the hydraulic cylinder through the small cavity oil port 5, so that the piston rod 10 and the inner cylinder 11 can be pushed to retract, when the piston rod 10 and the inner cylinder 11 retract, the hydraulic oil in the large cavity can be pushed to flow through the large cavity oil port 4 to be discharged out of the oil cylinder through the liquid passing pipe 19, and when the oil cylinder is retracted to the tail end of a stroke, the liquid passing pipe 19 can be contacted with the one-way valve core 8, so that the liquid passing pipe 19 can be blocked through the one-way valve core 8, hydraulic oil can be discharged only from the small hole in the valve core bolt 18 and the gap between the one-way valve core 8 and the valve core bolt 18, the oil discharge channel of the large cavity is reduced, the oil discharge interception is realized, the flow of the hydraulic oil in the oil discharge cylinder is limited, the speed is reduced when the hydraulic oil cylinder is retracted, and the purpose of the hydraulic oil cylinder is retracted is achieved, and the purpose of buffering is achieved.
The front end of the liquid passing pipe 19 adopts an eccentric structure;
through adopting eccentric structure, can make the rear end of lead to liquid pipe 19 can guarantee on the axle center of device, guarantee the hydraulic oil at the in-process of input and output, guarantee the stability of hydro-cylinder, can also prevent simultaneously to the hydraulic oil from getting into and discharging from little chamber hydraulic fluid port 5 and causing the influence.
The inner front end of the outer cylinder barrel 1 is provided with a second sealing ring 15, the outer periphery of the rear end of the inner cylinder barrel 11 is provided with a first sealing ring 12, and the outer periphery of the piston member 9 is provided with a third sealing ring 20;
the first sealing ring 12, the second sealing ring 15 and the third sealing ring 20 are made of elastic materials, such as rubber materials, nylon, polytetrafluoroethylene and the like, and the overall tightness of the device can be improved under the combined action of the first sealing ring 12, the second sealing ring 15 and the third sealing ring 20, so that hydraulic oil is prevented from leaking from the cylinder, and the pressure in the cylinder is kept.
The front end in the outer cylinder barrel 1 is provided with a dust ring 14, and the dust ring 14 is arranged at the front side of a second sealing ring 15;
the dust ring 14 is generally made of wear-resistant, elastic and oil-resistant materials so as to adapt to the high pressure and movement requirements of the hydraulic cylinder, and dust can be effectively prevented from entering the cylinder by the dust ring 14.
The inner wall of the supporting ring 13 is attached to the periphery of the piston rod 10;
the small cavity oil return hole II 7 can be effectively closed through the support ring 13 when the small cavity oil return hole II 7 moves to the support ring 13.
The spring member 17 is arranged on the periphery of the valve core bolt 18;
by providing the spring 17 on the outer periphery of the spool bolt 18, the coaxiality of the two members can be ensured, and the spring 17 can be prevented from being bent after being pressed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a multistage hydraulic cylinder with cushioning effect, includes outer cylinder (1), its characterized in that: the novel oil cylinder is characterized in that the outer cylinder (1) is connected with the inner cylinder (11) in a sliding manner, the piston (9) is connected in the inner cylinder (11) in a sliding manner, the piston (10) is fixedly connected with the front end of the piston (9), the piston (10) is far away from one end of the piston (9) and penetrates through the front end of the inner cylinder (11), the cylinder cover (3) is connected with the periphery of the front end of the piston (10) in a sliding manner, the cylinder cover (3) is fixedly connected with the inner wall of the inner cylinder (11), the supporting ring (13) is arranged on the inner wall of the cylinder cover (3), and the oil inlet assembly is arranged in the piston (10).
2. The multi-stage hydraulic cylinder with buffering function according to claim 1, wherein: the novel cylinder is characterized in that the rear end of the outer cylinder (1) is fixedly connected with the cylinder bottom (2), the middle part of the front end of the cylinder bottom (2) is fixedly connected with the spring seat (16), the front end of the spring seat (16) is fixedly connected with the spring piece (17), the front end of the spring piece (17) is fixedly connected with the one-way valve core (8), the middle part of the one-way valve core (8) is penetrated with the valve core bolt (18), and the rear end of the valve core bolt (18) is penetrated into the cylinder bottom (2).
3. The multi-stage hydraulic cylinder with buffering function according to claim 1, wherein: the oil inlet assembly comprises a large cavity oil port (4), one end of the large cavity oil port (4) is arranged at the front end of the piston rod (10), the other end of the large cavity oil port (4) penetrates through the front end in the piston rod (10) and is communicated with a liquid through pipe (19), the liquid through pipe (19) penetrates through the rear end of the piston rod (10), the front end of the piston rod (10) is provided with a small cavity oil port (5) one end, the other end of the small cavity oil port (5) penetrates through the front end in the piston rod (10), and a small cavity oil return hole I (6) and a small cavity oil return hole II (7) are sequentially arranged at the periphery of the rear end of the piston rod (10) from back to front.
4. A multi-stage hydraulic ram with cushioning according to claim 3, wherein: the front end of the liquid passing pipe (19) adopts an eccentric structure.
5. The multi-stage hydraulic cylinder with buffering function according to claim 1, wherein: the front end is provided with sealing washer two (15) in outer cylinder (1), interior cylinder (11) rear end periphery is provided with sealing washer one (12), piston spare (9) periphery is provided with sealing washer three (20).
6. The multi-stage hydraulic cylinder with buffering function according to claim 1, wherein: the front end is provided with a dust ring (14) in the outer cylinder (1), and the dust ring (14) is arranged on the front side of the second sealing ring (15).
7. The multi-stage hydraulic cylinder with buffering function according to claim 1, wherein: the inner wall of the supporting ring (13) is attached to the periphery of the piston rod (10).
8. The multi-stage hydraulic cylinder with buffering function according to claim 2, wherein: the spring member (17) is arranged on the periphery of the valve core bolt (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528020.1A CN117469232A (en) | 2023-11-15 | 2023-11-15 | Multistage hydraulic cylinder with buffering effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311528020.1A CN117469232A (en) | 2023-11-15 | 2023-11-15 | Multistage hydraulic cylinder with buffering effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117469232A true CN117469232A (en) | 2024-01-30 |
Family
ID=89627390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311528020.1A Pending CN117469232A (en) | 2023-11-15 | 2023-11-15 | Multistage hydraulic cylinder with buffering effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117469232A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5694827A (en) * | 1996-01-02 | 1997-12-09 | Euclid-Hitachi Heavy Equipment, Inc. | Dump body cushion |
| KR20040074518A (en) * | 2003-02-19 | 2004-08-25 | 백철재 | Multistage double acting oil pressure cylinder |
| CN201496340U (en) * | 2009-08-13 | 2010-06-02 | 湘电重型装备股份有限公司 | Multi-stage hydraulic cylinder with damping device of mining dumping truck, |
| CN102562709A (en) * | 2011-12-30 | 2012-07-11 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN102767548A (en) * | 2012-07-26 | 2012-11-07 | 三一矿机有限公司 | Multi-stage hydraulic cylinder and mining self-dumping truck |
| CN203702724U (en) * | 2013-12-17 | 2014-07-09 | 湘电重型装备有限公司 | Lifting hydraulic oil cylinder of mining dumper |
-
2023
- 2023-11-15 CN CN202311528020.1A patent/CN117469232A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5694827A (en) * | 1996-01-02 | 1997-12-09 | Euclid-Hitachi Heavy Equipment, Inc. | Dump body cushion |
| KR20040074518A (en) * | 2003-02-19 | 2004-08-25 | 백철재 | Multistage double acting oil pressure cylinder |
| CN201496340U (en) * | 2009-08-13 | 2010-06-02 | 湘电重型装备股份有限公司 | Multi-stage hydraulic cylinder with damping device of mining dumping truck, |
| CN102562709A (en) * | 2011-12-30 | 2012-07-11 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN102767548A (en) * | 2012-07-26 | 2012-11-07 | 三一矿机有限公司 | Multi-stage hydraulic cylinder and mining self-dumping truck |
| CN203702724U (en) * | 2013-12-17 | 2014-07-09 | 湘电重型装备有限公司 | Lifting hydraulic oil cylinder of mining dumper |
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| CB03 | Change of inventor or designer information |
Inventor after: Wang Gang Inventor after: Wang Mengjun Inventor after: Tang Shunxiao Inventor after: Han Wenhua Inventor before: Wang Gang Inventor before: Tang Shunxiao Inventor before: Han Wenhua |