CN112412922A - Energy-saving hydraulic cylinder with built-in core tube - Google Patents
Energy-saving hydraulic cylinder with built-in core tube Download PDFInfo
- Publication number
- CN112412922A CN112412922A CN202011353228.0A CN202011353228A CN112412922A CN 112412922 A CN112412922 A CN 112412922A CN 202011353228 A CN202011353228 A CN 202011353228A CN 112412922 A CN112412922 A CN 112412922A
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- Prior art keywords
- piston rod
- sleeve
- left end
- piston
- core tube
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Links
- 238000000034 method Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 15
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 31
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000011084 recovery Methods 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
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B15/1457—Piston rods
-
- 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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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 an energy-saving hydraulic cylinder with a built-in core tube, and belongs to the technical field of hydraulic cylinders. The right end of the core pipe is sleeved and fixed in an inner spigot at the left end of the cylinder bottom; the core tube is arranged at the axis of the piston rod sleeve, the left end of the core tube is provided with a small piston, and the circumferential surface of the small piston is matched with the inner wall of the piston rod sleeve; an oil port B communicated with the rod cavity is formed in the guide sleeve; the cylinder bottom is provided with an oil port A communicated with the rodless cavity, and is also provided with an oil port C communicated with the right end of the core pipe; and the oil port C is connected with an energy accumulator. The invention adopts an independent cylinder bottom design, can conveniently realize the disassembly and assembly of the piston rod and the internal core tube structure, and improves the installation and maintenance efficiency; the built-in core tube type energy-saving oil way is adopted, so that the connecting oil way between the energy storage cavity and the energy accumulator is simplified, the occupied space is reduced, and the cost is reduced; the whole weight of the hydraulic cylinder is reduced, the lightweight level is improved, and the energy-saving efficiency is further improved.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to an energy-saving hydraulic cylinder with a built-in core tube.
Background
The engineering machinery is used as the second major industry of internal combustion engine products, and has high emission density and emission indexes inferior to those of the automobile industry, so that the environmental pollution is more serious, the emission of the engineering machinery is imperative to be reduced, a new design concept of an excavator is generated based on the design requirements of energy conservation and emission reduction, the design structure of a boom cylinder of the excavator is reformed, the potential energy generated by the boom cylinder descending host arm support is recovered and stored, and the recovery and the reutilization of the energy are realized to become a major main flow direction.
The Chinese patent discloses a three-oil-cavity energy-saving hydraulic cylinder (CN 209704972U), which comprises a cylinder barrel, a cylinder bottom and an end cover, wherein the cylinder bottom and the end cover are arranged on the cylinder barrel, a hollow piston rod is arranged in the cylinder barrel, a piston is arranged on the hollow piston rod, a piston rod is arranged in the hollow piston rod, a first oil cavity is formed between the piston, the cylinder barrel, the cylinder bottom, a second oil cavity is formed between the piston rod, the cylinder bottom and the hollow piston rod, a third oil cavity is formed between the piston rod and the hollow piston rod, the second oil cavity is connected with an energy accumulator, the hollow piston rod retracts to enable hydraulic oil in the second oil cavity to enter the energy accumulator for energy storage, and the hydraulic oil in the. In this way, this utility model three oil pocket energy-conserving pneumatic cylinders can reduce the power of the required flow of hydraulic pump and engine in the whole hydro-cylinder operation process.
The disadvantages of the existing method are that: the energy storage cavity oil port is arranged at the end of the piston rod lug ring, so that the oil path between the energy storage cavity oil port and the energy accumulator is complicated, the whole weight of the hydraulic cylinder is heavy, and the energy-saving effect is influenced to a certain extent.
Disclosure of Invention
In order to solve the technical problem, the invention provides an energy-saving hydraulic cylinder with a built-in core tube.
The invention is realized by the following technical scheme: an energy-saving hydraulic cylinder with a built-in core tube comprises a cylinder bottom, wherein the left end of the cylinder bottom is provided with an inner spigot and an outer spigot; the right end of the cylinder barrel is sleeved and fixed in the outer front opening at the left end of the cylinder bottom, and the right end of the core pipe is sleeved and fixed in the inner front opening at the left end of the cylinder bottom; the right end of the guide sleeve is provided with an outer spigot, and the left end of the cylinder barrel is sleeved and fixed in the outer spigot at the right end of the guide sleeve; the piston rod sleeve is slidably arranged in the guide sleeve, the right end of the piston rod sleeve is provided with a large piston, and the circumferential surface of the large piston is matched with the inner wall of the cylinder barrel; a piston rod head is fixed at the left end of the piston rod sleeve in a sealing way; the core tube is arranged at the axis of the piston rod sleeve, the left end of the core tube is provided with a small piston, and the circumferential surface of the small piston is matched with the inner wall of the piston rod sleeve; an oil port B communicated with the rod cavity is formed in the guide sleeve; the cylinder bottom is provided with an oil port A communicated with the rodless cavity, and is also provided with an oil port C communicated with the right end of the core pipe; and the oil port C is connected with an energy accumulator.
It further comprises the following steps: the inner wall of the right end of the guide sleeve is provided with a buffer groove, and the right end of the guide sleeve is provided with an oil duct communicated with the right end face of the guide sleeve and the left end of the buffer groove; and a buffer sleeve is arranged on the left side of the large piston on the piston rod sleeve, and the buffer sleeve is in clearance fit with the buffer groove of the guide sleeve.
The inner wall of the buffer sleeve is in a step shape, and the piston rod sleeve is provided with a step matched with the inner wall of the buffer sleeve; the bottom of the step on the inner wall of the piston rod sleeve is provided with an arc-shaped groove.
The right end of the piston rod sleeve is provided with a positioning ring in threaded connection, the positioning ring is positioned in the inner front opening at the right end of the large piston, and the positioning ring and the right end of the large piston are positioned through a positioning screw I.
The small piston is sleeved on an outer spigot at the left end of the piston rod sleeve in a matched manner; the left end of the piston rod sleeve is provided with an internal thread; the right end of the positioning disc is provided with a protruding cylinder, the cylinder of the positioning disc is installed in an inner hole at the left end of the piston rod sleeve through threaded connection, and the periphery of the positioning disc is pressed on the left end face of the small piston; the periphery of the positioning disc and the left end face of the small piston are positioned through a positioning screw II.
Compared with the prior art, the invention has the beneficial effects that:
1, an energy storage cavity is formed between an inner cavity of a piston rod sleeve and a small piston, oil in the energy storage cavity flows into an energy accumulator for energy storage through a core tube type energy-saving oil way by the piston rod sleeve in the falling process of a host arm support, and the energy returns to the energy storage cavity to provide kinetic energy for a sleeve type piston rod in the rising process of the host arm support;
2, the independent cylinder bottom design is adopted, so that the disassembly and assembly of the piston rod and the internal core tube structure can be conveniently realized, and the installation and maintenance efficiency is improved;
3, a core tube type energy-saving oil way is arranged in the energy storage device, so that a connecting oil way between the energy storage cavity and the energy accumulator is simplified, the occupied space is reduced, and the cost is reduced; the whole weight of the hydraulic cylinder is reduced, the lightweight level is improved, and the energy-saving efficiency is further improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view at D of FIG. 1;
FIG. 3 is an enlarged view at E in FIG. 1;
in the figure: 1. a cylinder bottom; 2. a cylinder barrel; 3. a core tube; 4. a guide sleeve; 4-1, a buffer tank; 4-2, oil ducts; 5. a piston rod sleeve; 5-1, arc-shaped grooves; 6. a large piston; 7. a piston rod head; 8. a small piston; 9. a buffer sleeve; 10. a positioning ring; 11. a positioning screw I; 12. positioning a plate; 13. and a positioning screw II.
Detailed Description
The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.
As shown in figures 1 to 3, a built-in core tube type energy-saving hydraulic cylinder is provided, wherein a cylinder bottom 1 is independently arranged, and the left end of the cylinder bottom 1 is provided with an inner spigot and an outer spigot. The right end of the cylinder barrel 2 is sleeved in an outer spigot at the left end of the cylinder bottom 1 and is fixed through a screw; the left end of the cylinder barrel 2 is sleeved in the outer spigot at the right end of the guide sleeve 4 and is fixed through a screw.
A piston rod sleeve 5 is slidably arranged in the guide sleeve 4, a large piston 6 is arranged at the right end of the piston rod sleeve 5, and the circumferential surface of the large piston 6 is matched with the inner wall of the cylinder barrel 2; the left end of the piston rod sleeve 5 is fixed with a piston rod head 7 in a sealing way. The right end of the plug rod sleeve 5 is provided with a positioning ring 10 through threaded connection, the positioning ring 10 is positioned in the inner front opening at the right end of the large piston 6, and the positioning ring 10 and the right end of the large piston 6 are positioned through a positioning screw I11. An oil port B communicated with the rod cavity is formed in the guide sleeve 4; the inner wall of the right end of the guide sleeve 4 is provided with a buffer groove 4-1, and the oil port B is communicated with the right end face of the guide sleeve 4. The right end of the guide sleeve 4 is provided with an oil duct 4-2 which is communicated with the right end face of the guide sleeve 4 and the left end of the buffer groove 4-1. The left side of a large piston 6 on the piston rod sleeve 5 is provided with a buffer sleeve 9, and the buffer sleeve 9 is in clearance fit with the buffer groove 4-1 of the guide sleeve 4. The inner wall of the buffer sleeve 9 is in a step shape, and the piston rod sleeve 5 is provided with a step matched with the inner wall of the buffer sleeve 9; the bottom of the step on the inner wall of the piston rod sleeve 5 is provided with an arc-shaped groove 5-1. The buffer sleeve 9 and the buffer groove 4-1 are used for buffering the piston rod, oil circulation is improved through the oil passage 4-2, and the starting speed of the piston rod is improved.
The right end of the core tube 3 is sleeved in an inner front opening at the left end of the cylinder bottom 1 and is fixed through a screw. The core tube 3 is arranged at the axis of the piston rod sleeve 5, the left end of the core tube 3 is provided with a small piston 8, and the circumferential surface of the small piston 8 is matched with the inner wall of the piston rod sleeve 5. The left end of the piston rod sleeve 5 is provided with internal threads; a protruding cylinder is arranged at the right end of the positioning disc 12, the cylinder of the positioning disc 12 is installed in an inner hole at the left end of the piston rod sleeve 5 through threaded connection, and the periphery of the positioning disc 12 is pressed on the left end face of the small piston 8; the periphery of the positioning disc 12 and the left end face of the small piston 8 are positioned through a positioning screw II 13. An oil port A communicated with the rodless cavity and an oil port C communicated with the right end of the core tube 3 are formed in the cylinder bottom 1; the oil port C is connected with an energy accumulator.
The working principle is as follows:
an energy storage cavity is formed between the inner cavity of the piston rod sleeve and the small piston, oil in the energy storage cavity flows into the energy accumulator for energy storage through the core tube type energy-saving oil way in the falling process of the host arm support by the piston rod sleeve, and the energy returns to the energy storage cavity to provide kinetic energy for the sleeve type piston rod in the rising process of the host arm support.
The cylinder bottom design of stand alone type is adopted to this embodiment, and the dismouting of realization piston rod and inside core tube structure that can be convenient improves installation and maintenance efficiency. The built-in core tube type energy-saving oil way simplifies the connecting oil way between the energy storage cavity and the energy accumulator, reduces the space occupation and reduces the cost; the whole weight of the hydraulic cylinder is reduced, the lightweight level is improved, and the energy-saving efficiency is further improved.
Claims (5)
1. An energy-saving hydraulic cylinder with a built-in core tube,
the method is characterized in that:
comprises a cylinder bottom (1), wherein the left end of the cylinder bottom (1) is provided with an inner spigot and an outer spigot; the right end of the cylinder barrel (2) is sleeved and fixed in the outer front opening at the left end of the cylinder bottom (1), and the right end of the core pipe (3) is sleeved and fixed in the inner front opening at the left end of the cylinder bottom (1); the right end of the guide sleeve (4) is provided with an outer spigot, and the left end of the cylinder barrel (2) is sleeved and fixed in the outer spigot at the right end of the guide sleeve (4);
the piston rod sleeve (5) is slidably arranged in the guide sleeve (4), the right end of the piston rod sleeve (5) is provided with a large piston (6), and the circumferential surface of the large piston (6) is matched with the inner wall of the cylinder barrel (2); a piston rod head (7) is fixed at the left end of the piston rod sleeve (5) in a sealing way;
the core tube (3) is arranged at the axis of the piston rod sleeve (5), a small piston (8) is installed at the left end of the core tube (3), and the circumferential surface of the small piston (8) is matched with the inner wall of the piston rod sleeve (5);
an oil port B communicated with the rod cavity is formed in the guide sleeve (4); an oil port A communicated with the rodless cavity is formed in the cylinder bottom (1), and an oil port C communicated with the right end of the core pipe (3) is also formed in the cylinder bottom (1); and the oil port C is connected with an energy accumulator.
2. The built-in core tube type energy-saving hydraulic cylinder as claimed in claim 1, characterized in that: a buffer groove (4-1) is formed in the inner wall of the right end of the guide sleeve (4), and an oil duct (4-2) communicated with the right end face of the guide sleeve (4) and the left end of the buffer groove (4-1) is formed in the right end of the guide sleeve (4); a buffer sleeve (9) is installed on the left side of a large piston (6) on the piston rod sleeve (5), and the buffer sleeve (9) is in clearance fit with a buffer groove (4-1) of the guide sleeve (4).
3. The built-in core tube type energy-saving hydraulic cylinder as claimed in claim 2, characterized in that: the inner wall of the buffer sleeve (9) is in a step shape, and the piston rod sleeve (5) is provided with a step matched with the inner wall of the buffer sleeve (9); the bottom of the step of the inner wall of the piston rod sleeve (5) is provided with an arc-shaped groove (5-1).
4. The built-in core tube type energy-saving hydraulic cylinder as claimed in claim 1, characterized in that: piston rod sleeve (5) right-hand member installs holding ring (10) through threaded connection, and holding ring (10) are arranged in big piston (6) right-hand member tang, fix a position through set screw I (11) between holding ring (10) and big piston (6) right-hand member.
5. The built-in core tube type energy-saving hydraulic cylinder as claimed in claim 1, characterized in that: the small piston (8) is sleeved on an outer spigot at the left end of the piston rod sleeve (5) in a matched manner; the left end of the piston rod sleeve (5) is provided with an internal thread; the right end of the positioning disc (12) is provided with a convex cylinder, the cylinder of the positioning disc (12) is installed in an inner hole at the left end of the piston rod sleeve (5) through threaded connection, and the periphery of the positioning disc (12) is pressed on the left end face of the small piston (8); the periphery of the positioning disc (12) and the left end face of the small piston (8) are positioned through a positioning screw II (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011353228.0A CN112412922A (en) | 2020-11-27 | 2020-11-27 | Energy-saving hydraulic cylinder with built-in core tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011353228.0A CN112412922A (en) | 2020-11-27 | 2020-11-27 | Energy-saving hydraulic cylinder with built-in core tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112412922A true CN112412922A (en) | 2021-02-26 |
Family
ID=74842603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011353228.0A Pending CN112412922A (en) | 2020-11-27 | 2020-11-27 | Energy-saving hydraulic cylinder with built-in core tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412922A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688125A (en) * | 2022-04-26 | 2022-07-01 | 徐州炎黄工程机械有限公司 | A piston rod cavity oil storage cylinder |
| CN117267210A (en) * | 2023-11-02 | 2023-12-22 | 徐州徐工液压件有限公司 | A reverse disassembly-integrated four-stage sequential telescopic hydraulic cylinder |
| CN118793661A (en) * | 2024-07-31 | 2024-10-18 | 徐州徐工液压件有限公司 | A detachable articulated cylinder with inner cavity guided pressurization, active and passive retraction |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514944A (en) * | 2009-03-19 | 2009-08-26 | 浙江大学 | Hydraulic drive sampling assemble for seabed cylindrical sample |
| CN201687797U (en) * | 2010-06-01 | 2010-12-29 | 湖南特力液压有限公司 | Hydraulic cylinder with buffer unit |
| CN102434530A (en) * | 2011-12-05 | 2012-05-02 | 韶关液压件厂有限公司 | Differential plunger composite oil cylinder |
| CN202746329U (en) * | 2012-08-22 | 2013-02-20 | 徐州徐工液压件有限公司 | Step type buffering sleeve for hydraulic cylinder |
| CN104806600A (en) * | 2015-04-16 | 2015-07-29 | 徐州重型机械有限公司 | Variable-speed hydraulic cylinder |
| CN104863924A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Three-cavity power hydraulic cylinder |
| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic Cylinder Buffer Structure and Its Construction Machinery |
| CN109595217A (en) * | 2019-01-02 | 2019-04-09 | 中船重工中南装备有限责任公司 | The oil cylinder of asphalt channel built in a kind of band |
| CN209704972U (en) * | 2019-03-07 | 2019-11-29 | 江苏恒立液压股份有限公司 | Three oil pocket energy-conserving hydraulic cylinders |
-
2020
- 2020-11-27 CN CN202011353228.0A patent/CN112412922A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514944A (en) * | 2009-03-19 | 2009-08-26 | 浙江大学 | Hydraulic drive sampling assemble for seabed cylindrical sample |
| CN201687797U (en) * | 2010-06-01 | 2010-12-29 | 湖南特力液压有限公司 | Hydraulic cylinder with buffer unit |
| CN102434530A (en) * | 2011-12-05 | 2012-05-02 | 韶关液压件厂有限公司 | Differential plunger composite oil cylinder |
| CN202746329U (en) * | 2012-08-22 | 2013-02-20 | 徐州徐工液压件有限公司 | Step type buffering sleeve for hydraulic cylinder |
| CN104806600A (en) * | 2015-04-16 | 2015-07-29 | 徐州重型机械有限公司 | Variable-speed hydraulic cylinder |
| CN104863924A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Three-cavity power hydraulic cylinder |
| CN106704288A (en) * | 2015-07-14 | 2017-05-24 | 徐工集团工程机械股份有限公司 | Hydraulic Cylinder Buffer Structure and Its Construction Machinery |
| CN109595217A (en) * | 2019-01-02 | 2019-04-09 | 中船重工中南装备有限责任公司 | The oil cylinder of asphalt channel built in a kind of band |
| CN209704972U (en) * | 2019-03-07 | 2019-11-29 | 江苏恒立液压股份有限公司 | Three oil pocket energy-conserving hydraulic cylinders |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114688125A (en) * | 2022-04-26 | 2022-07-01 | 徐州炎黄工程机械有限公司 | A piston rod cavity oil storage cylinder |
| CN117267210A (en) * | 2023-11-02 | 2023-12-22 | 徐州徐工液压件有限公司 | A reverse disassembly-integrated four-stage sequential telescopic hydraulic cylinder |
| CN118793661A (en) * | 2024-07-31 | 2024-10-18 | 徐州徐工液压件有限公司 | A detachable articulated cylinder with inner cavity guided pressurization, active and passive retraction |
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Application publication date: 20210226 |
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| RJ01 | Rejection of invention patent application after publication |