CN110735825B - Composite function oil cylinder - Google Patents
Composite function oil cylinder Download PDFInfo
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- CN110735825B CN110735825B CN201911033019.5A CN201911033019A CN110735825B CN 110735825 B CN110735825 B CN 110735825B CN 201911033019 A CN201911033019 A CN 201911033019A CN 110735825 B CN110735825 B CN 110735825B
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- 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
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- 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
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- 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
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- 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
- F15B15/225—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke with valve stems operated by contact with the piston end face or with the cylinder wall
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- 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
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- 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 composite function oil cylinder which comprises a cylinder body, wherein two ends of the cylinder body are provided with openings, an upper end cover is fixedly arranged at the opening of the upper end of the cylinder body, and a lower end cover is fixedly arranged at the opening of the lower end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, and a piston rod penetrating through the upper end cover is arranged on the piston body; a rodless cavity is formed between the piston body and the lower end cover in the cylinder body, and a rod cavity is formed between the piston body and the upper end cover; the side surface of the cylinder body is provided with an air hole communicated with the rod cavity; the lower end of the piston body is provided with a piston hole, the lower end of the piston hole is connected with a piston ring, and the lower end cover is provided with a convex column; the lower end of the lower end cover is provided with an opening A and an opening B; the outer circumferential side surface of the piston rod close to the upper end is fixedly provided with a control valve; this complex function hydro-cylinder, simple structure not only passes through two hydraulic fluid ports moreover, makes the pipeline of system more succinct, and carries out the switching of operating mode through pressure variation, makes control simpler.
Description
Technical Field
The invention belongs to the technical field of oil cylinders, and particularly relates to an oil cylinder with a composite function.
Background
The sliding blocks on most hydraulic machines need to carry out fast forward, fast backward, work speed and other actions, which are generally realized by driving an oil cylinder through external hydraulic control, but the functions are difficult to realize by the traditional oil cylinder structure. The patent publication No. CN 101929486A, entitled composite oil cylinder, provides a technical scheme capable of realizing functions of fast forward, fast backward, work speed and the like of the oil cylinder, but the design realizes the action requirements of fast forward, fast backward and work speed of the oil cylinder by arranging a small oil cylinder in a piston rod and controlling through the cooperation of four oil ports, and the oil cylinder is complicated in connecting a system pipeline during use and complicated in control work and is not beneficial to the use of the oil cylinder.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a composite function oil cylinder which is simple in structure, enables a pipeline of a system to be simpler through two oil ports, and enables working conditions to be switched through pressure change, so that control is simpler.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a composite function oil cylinder comprises a cylinder body with openings at two ends, wherein an upper end cover is fixedly arranged at the opening of the upper end of the cylinder body, and a lower end cover is fixedly arranged at the opening of the lower end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, a piston rod penetrating through an upper end cover is arranged on the piston body, and the piston rod is connected in the upper end cover in a sliding manner; a rodless cavity is formed between the piston body and the lower end cover in the cylinder body, and a rod cavity is formed between the piston body and the upper end cover; the side surface of the cylinder body is provided with an air hole communicated with the rod cavity; the lower end of the piston body is provided with a piston hole extending upwards into the piston rod, the lower end opening of the piston hole is in threaded connection with a piston ring, the lower end cover is upwards provided with a convex column penetrating through the piston ring and extending into the piston hole along the vertical direction, the convex column is in sliding connection with the inner ring of the piston ring, and the outer circumferential side surface of the convex column is provided with a convex edge in sliding connection with the piston hole at the position close to the upper end of the convex column; a first oil chamber is formed in the piston hole between the convex edge and the piston ring, and a second oil chamber is formed between the convex edge and the upper end of the piston hole; the lower end of the lower end cover is provided with an opening A and an opening B, and a first communication hole for communicating the opening A with the second oil chamber and a second communication hole for communicating the opening B with the first oil chamber are arranged in the lower end cover and the convex column; the piston rod is fixedly provided with a control valve on the outer circumferential side surface close to the upper end, a first valve hole of the control valve is communicated with the first oil chamber through a third communicating hole formed in the piston rod and the piston body, a second valve hole of the control valve is communicated with the rodless chamber through a fourth communicating hole formed in the piston rod and the piston body, and a third valve hole of the control valve is communicated with the second oil chamber through a fifth communicating hole formed in the piston rod and the piston body.
In a further technical scheme, the control valve comprises a valve body, a valve core, a spring and a plug, wherein a mounting hole is formed in the side face of the outer circumference of the piston rod, which is close to the upper end of the piston rod, the valve body is inserted and mounted in the mounting hole, valve holes which are communicated with a first valve hole, a second valve hole and a third valve hole are formed in the valve body, the valve core is connected in the valve holes in a sliding mode, the plug is fixedly mounted at the opening of the valve holes, and the spring is located between the plug and the valve core and used for forcing the valve core to press the third; the valve core is provided with a first oil port communicated with the first valve hole at one end close to the spring, a second oil port communicated with the third valve hole at one end far away from the spring, an oil hole used for communicating the first oil port with the second oil port is formed in the valve core, and a sixth communication hole communicated with the oil hole is formed in the circumferential side surface of the valve core; the shuttle valve comprises an oil hole, a shuttle valve rod is connected in the oil hole in a sliding mode, one end of the shuttle valve rod is provided with a first shuttle valve body used for controlling the opening and closing of a first oil port, the other end of the shuttle valve rod is provided with a second shuttle valve body used for controlling the opening and closing of a second oil port, and a communicating groove is formed in the side face of the outer circumference of the shuttle valve rod along the axial direction of.
In a further technical scheme, the plug is internally threaded with an adjusting screw rod, one end of the adjusting screw rod extends into the valve hole, and the adjusting screw rod is used for adjusting the pretightening force of the spring; one end of the adjusting screw rod extending into the valve hole is provided with a plug body connected in the plug in a sliding mode, and the spring is located between the plug body and the valve core.
In a further technical scheme, the adjusting screw is in threaded connection with a lock nut, and the lock nut is positioned on the outer side of the plug.
In a further technical scheme, the plug body is provided with a positioning convex column at the center of the end face facing the spring, the positioning convex column is sleeved with a gasket, and one end of the spring is abutted against the gasket.
In a further technical scheme, a first annular groove is formed in the side face of the outer circumference of the plug body, and a first sealing ring is arranged in the first annular groove.
In a further technical scheme, a second annular groove is formed in the outer circumferential side face of the valve body between the first valve hole and the second valve hole, a third annular groove is formed between the second valve hole and the third valve hole, a second sealing ring is arranged in the second annular groove, and a third sealing ring is arranged in the third annular groove.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the flow direction of the hydraulic oil is controlled by using one control valve, so that the oil cylinder is controlled to meet different working condition requirements of fast forward, fast backward, working speed and the like, and the operation is convenient and ingenious;
(2) the requirement of the hydraulic oil supply device is realized through the port A and the port B, so that the pipeline of the system is simpler;
(3) the working conditions are switched through pressure change, so that the control is simpler.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view of the control valve of the present invention;
fig. 3 is an enlarged structural view at C in fig. 2.
Detailed Description
Referring to fig. 1-3, a complex function oil cylinder includes a cylinder body 2 with openings at two ends, an upper end cover 9 is fixedly installed at the opening of the upper end of the cylinder body 2, and a lower end cover 4 is fixedly installed at the opening of the lower end; the cylinder body 2 is connected with a piston body 1 in a sliding manner, a piston rod 11 penetrating through an upper end cover 9 is arranged on the piston body 1, and the piston rod 11 is connected in the upper end cover 9 in a sliding manner; a rodless cavity 2a is formed between the piston body 1 and the lower end cover 4 in the cylinder body 2, and a rod cavity 2b is formed between the piston body 1 and the upper end cover 9; the side surface of the cylinder body 2 is provided with an air hole 2c communicated with the rod cavity 2 b; the lower end of the piston body 1 is provided with a piston hole extending upwards into the piston rod 11, the lower end opening of the piston hole is in threaded connection with a piston ring 12, the lower end cover 4 is provided with a convex column 41 which penetrates through the piston ring 12 and extends into the piston hole upwards along the vertical direction, the convex column 41 is in sliding connection with the inner ring of the piston ring 12, and the outer circumferential side surface of the convex column 41 is provided with a convex edge 42 which is in sliding connection with the piston hole at the position close to the upper end of the convex column 41; a first oil chamber 4b is formed in the piston bore between the flange 42 and the piston ring 12, and a second oil chamber 4a is formed between the flange 42 and the upper end of the piston bore; the lower end of the lower end cover 4 is provided with a port A and a port B, and a first communication hole 4d for communicating the port A with the second oil chamber 4a and a second communication hole 4c for communicating the port B with the first oil chamber 4B are arranged in the lower end cover 4 and the convex column 41; the piston rod 11 is fixedly provided with a control valve 3 on the outer circumferential side surface near the upper end, a first valve hole 7c of the control valve 3 is communicated with the first oil chamber 4b through a third communication hole 1a arranged in the piston rod 11 and the piston body 1, a second valve hole 7b of the control valve 3 is communicated with the rodless chamber 2a through a fourth communication hole 1b arranged in the piston rod 11 and the piston body 1, and a third valve hole 7a of the control valve 3 is communicated with the second oil chamber 4a through a fifth communication hole 1d arranged in the piston rod 11 and the piston body 1.
The control valve 3 comprises a valve body 7, a valve core 5, a spring 8 and a plug 16, wherein a mounting hole 11a is formed in the outer circumferential side surface of the piston rod 11 close to the upper end of the piston rod, the valve body 7 is inserted and mounted in the mounting hole 11a, a valve hole 71 communicated with a first valve hole 7c, a second valve hole 7b and a third valve hole 7a is formed in the valve body 7, the valve core 5 is connected in the valve hole 71 in a sliding mode, the plug 16 is fixedly mounted at the opening of the valve hole 71, and the spring 8 is located between the plug 16 and the valve core 5 and used for forcing the valve core 5 to press the third valve hole 7 a; a first oil port 51 communicated with the first valve hole 7c is formed at one end, close to the spring 8, of the valve core 5, a second oil port 52 communicated with the third valve hole 7a is formed at one end, far away from the spring 8, of the valve core 5, an oil hole 53 for communicating the first oil port 51 with the second oil port 52 is formed in the valve core 5, and a sixth communication hole 5a communicated with the oil hole 53 is formed in the circumferential side surface of the valve core 5; a shuttle valve rod 6 is connected in the oil hole 53 in a sliding manner, one end of the shuttle valve rod 6 is provided with a first shuttle valve body 61 for controlling the opening and closing of the first oil hole 51, the other end of the shuttle valve rod 6 is provided with a second shuttle valve body 62 for controlling the opening and closing of the second oil hole 52, and a communication groove 6c is formed on the side surface of the outer circumference of the shuttle valve rod 6 along the axial direction thereof.
The inner thread of the plug 16 is connected with an adjusting screw rod 31 with one end extending into the valve hole 71, and the adjusting screw rod 31 is used for adjusting the pretightening force of the spring 8; one end of the adjusting screw 31 extending into the valve hole 71 is provided with a plug body 32 connected in a sliding manner in the plug 16, and the spring 8 is positioned between the plug body 32 and the valve core 5. The adjusting screw 31 is connected with a lock nut 33 through threads, and the lock nut 33 is positioned on the outer side of the plug 16. The plug body 32 is provided with a positioning convex column 34 at the central position of the end surface facing the spring 8, a washer 35 is sleeved on the positioning convex column 34, and one end of the spring 8 is abutted against the washer 35. A first annular groove 32a is formed in the outer circumferential side surface of the plug body 32, and a first sealing ring 36 is arranged in the first annular groove 32 a. A second annular groove 7d is formed in the outer circumferential side surface of the valve body 7 between the first valve hole 7c and the second valve hole 7b, a third annular groove 7e is formed between the second valve hole 7b and the third valve hole 7a, a second sealing ring 37 is arranged in the second annular groove 7d, and a third sealing ring 38 is arranged in the third annular groove 7 e.
When the composite function oil cylinder works, the oil cylinder can work only by connecting the port A and the port B with a system pipeline. When the composite function oil cylinder fast-forwards, firstly the oil cylinder is in a retraction state, a system pipeline leads hydraulic oil into the oil cylinder from the port A, the hydraulic oil enters the second oil chamber 4a through the port A and the first communication hole 4d, and leads the hydraulic oil into the third valve hole 7a of the control valve 3 through the fifth communication hole 1d, due to the relationship of liquid flow, the second shuttle valve body 62 closes the second oil port 52, the system pressure is low at the moment, the valve core 5 can not be pushed to move towards the direction of the plug 16 to open the third valve hole 7a by overcoming the spring 8, meanwhile, the first shuttle valve body 61 opens the first oil port 51 to lead the second valve hole 7B to be communicated with the first valve hole 7c, so that the hydraulic oil enters the second oil chamber 4a and then pushes the piston rod 11 to extend out, and the hydraulic oil enters the first valve hole 7c through the port B, the second communication hole 4c, the first oil chamber 4B and the third communication hole, and then enters the second valve hole 7b through the first oil port 51, the communication groove 6c and the sixth communication hole 5a, and is replenished into the rodless chamber 2a through the fourth communication hole 1b, while the air in the rod chamber 2b is discharged into the atmosphere from the air hole 2c as the piston rod 11 is extended. In the process, compared with a common oil cylinder with the same cylinder diameter, under the condition of the same inlet flow, the cross section area of the second oil chamber 4a is far smaller than that of the oil cylinder, so that the piston rod 11 extends out more quickly, and the function of fast forwarding is realized.
When the composite function oil cylinder is fast retracted, firstly, the oil cylinder is in an extending state, a system pipeline leads hydraulic oil into the oil cylinder from the port B, the hydraulic oil enters the first oil chamber 4B through the port B and the second communication hole 4c, and leads the hydraulic oil into the first valve hole 7c of the control valve 3 through the third communication hole 1a, due to the relation of liquid flow, the first shuttle valve body 61 closes the first oil port 51, the second shuttle valve body 62 opens the second oil port 52, so that the second valve hole 7B is communicated with the third valve hole 7a, the hydraulic oil enters the first oil chamber 4B and pushes the piston rod 11 to retract, the hydraulic oil in the rodless chamber 2a enters the second valve hole 7B through the fourth communication hole 1B, enters the third valve hole 7a through the sixth communication hole 5a, the communication groove 6c and the second oil port 52, and enters the second oil chamber 4a through the fifth communication hole 1d, and then enters the second oil chamber 4a through the first communication hole 4d, The port A is discharged out of the oil cylinder, air in the atmosphere is sucked into the rod cavity 2b through the air hole 2c along with the retraction of the piston rod 11, and in the process, compared with a common oil cylinder with the same cylinder diameter, under the condition of the same inlet flow, the retraction speed of the piston rod 11 is higher because the cross section area of the first oil cavity 4b is far smaller than that of the oil cylinder, and the function of quick retraction is realized.
When the composite function oil cylinder works at a working speed, firstly the oil cylinder does work outwards, the system pressure is increased, a system pipeline leads hydraulic oil into the oil cylinder from the port A, the hydraulic oil enters the second oil chamber 4a through the port A and the first communication hole 4d, the hydraulic oil is led into the third valve hole 7a through the fifth communication hole 1d, due to the relation of liquid flow, the second shuttle valve body 62 closes the second oil port 52, the system pressure is higher than the set pressure of the spring 8, the hydraulic oil overcomes the spring 8 to push the valve core 5 to move towards the direction of the plug 16 to open the third valve hole 7a, the sixth communication hole 5a is covered and closed, the second valve hole 7b is not communicated with the first valve hole 7c, and the third valve hole 7a is communicated with the second valve hole 7b, so that the hydraulic oil enters the second oil chamber 4a, enters the third valve hole 7a through the fifth communication hole 1d, and then enters the second valve hole 7b, The fourth communication hole 1b enters the rodless cavity 2a, air in the rod cavity 2b is discharged into the atmosphere from the air hole 2c along with the extension of the piston rod 11, high-pressure oil acts on the cross section of the whole piston body 1 at the moment, and the extension speed of the piston rod 11 is the same as that of a common oil cylinder with the same cylinder diameter; because the area that hydraulic oil used is the cross-sectional area of piston body 1, consequently can realize the full load work under the worker's speed, accomplish the operating mode requirement when the worker is fast.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A composite function oil cylinder comprises a cylinder body with openings at two ends, wherein an upper end cover is fixedly arranged at the opening of the upper end of the cylinder body, and a lower end cover is fixedly arranged at the opening of the lower end of the cylinder body; a piston body is connected in the cylinder body in a sliding manner, a piston rod penetrating through an upper end cover is arranged on the piston body, and the piston rod is connected in the upper end cover in a sliding manner; a rodless cavity is formed between the piston body and the lower end cover in the cylinder body, and a rod cavity is formed between the piston body and the upper end cover; the side surface of the cylinder body is provided with an air hole communicated with the rod cavity; the piston is characterized in that a piston hole extending upwards into the piston rod is formed in the lower end of the piston body, a piston ring is connected to an opening of the lower end of the piston hole in a threaded mode, a convex column penetrating through the piston ring and extending into the piston hole is arranged on the lower end cover upwards along the vertical direction, the convex column is connected with an inner ring of the piston ring in a sliding mode, and a convex edge connected with the piston hole in a sliding mode is arranged on the position, close to the upper end, of the outer circumferential side face of the convex column; a first oil chamber is formed in the piston hole between the convex edge and the piston ring, and a second oil chamber is formed between the convex edge and the upper end of the piston hole; the lower end of the lower end cover is provided with an opening A and an opening B, and a first communication hole for communicating the opening A with the second oil chamber and a second communication hole for communicating the opening B with the first oil chamber are arranged in the lower end cover and the convex column; the piston rod is fixedly provided with a control valve on the outer circumferential side surface close to the upper end, a first valve hole of the control valve is communicated with the first oil chamber through a third communicating hole formed in the piston rod and the piston body, a second valve hole of the control valve is communicated with the rodless chamber through a fourth communicating hole formed in the piston rod and the piston body, and a third valve hole of the control valve is communicated with the second oil chamber through a fifth communicating hole formed in the piston rod and the piston body.
2. The compound function oil cylinder according to claim 1, wherein the control valve comprises a valve body, a valve core, a spring and a plug, the piston rod is provided with a mounting hole on the outer circumferential side surface near the upper end of the piston rod, the valve body is inserted and mounted in the mounting hole, the valve body is internally provided with valve holes communicated with a first valve hole, a second valve hole and a third valve hole, the valve core is connected in the valve holes in a sliding manner, the plug is fixedly mounted at the opening of the valve holes, and the spring is positioned between the plug and the valve core and used for forcing the valve core to press the third valve hole; the valve core is provided with a first oil port communicated with the first valve hole at one end close to the spring, a second oil port communicated with the third valve hole at one end far away from the spring, an oil hole used for communicating the first oil port with the second oil port is formed in the valve core, and a sixth communication hole communicated with the oil hole is formed in the circumferential side surface of the valve core; the shuttle valve comprises an oil hole, a shuttle valve rod is connected in the oil hole in a sliding mode, one end of the shuttle valve rod is provided with a first shuttle valve body used for controlling the opening and closing of a first oil port, the other end of the shuttle valve rod is provided with a second shuttle valve body used for controlling the opening and closing of a second oil port, and a communicating groove is formed in the side face of the outer circumference of the shuttle valve rod along the axial direction of.
3. The compound function oil cylinder according to claim 2, characterized in that the plug is internally threaded with an adjusting screw with one end extending into the valve hole, and the adjusting screw is used for adjusting the pretightening force of the spring; one end of the adjusting screw rod extending into the valve hole is provided with a plug body connected in the plug in a sliding mode, and the spring is located between the plug body and the valve core.
4. The combined function oil cylinder as claimed in claim 3, wherein the adjusting screw is connected with a lock nut in a threaded manner, and the lock nut is positioned on the outer side of the plug.
5. The combined function oil cylinder as defined in claim 3, wherein the plug body is provided with a positioning convex column at a central position of an end surface facing the spring, the positioning convex column is sleeved with a washer, and one end of the spring abuts against the washer.
6. The cylinder of claim 3, wherein the plug body has a first annular groove on the outer circumferential side thereof, and the first annular groove has a first seal ring therein.
7. The multi-function cylinder according to claim 3, wherein a second annular groove is provided between the first valve hole and the second valve hole on the outer circumferential side of the valve body, a third annular groove is provided between the second valve hole and the third valve hole, a second seal ring is provided in the second annular groove, and a third seal ring is provided in the third annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911033019.5A CN110735825B (en) | 2019-10-28 | 2019-10-28 | Composite function oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911033019.5A CN110735825B (en) | 2019-10-28 | 2019-10-28 | Composite function oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110735825A CN110735825A (en) | 2020-01-31 |
| CN110735825B true CN110735825B (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911033019.5A Active CN110735825B (en) | 2019-10-28 | 2019-10-28 | Composite function oil cylinder |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63243507A (en) * | 1987-03-30 | 1988-10-11 | Yamakiyuu Chain Kk | Complex cylinder |
| CN2828407Y (en) * | 2005-09-12 | 2006-10-18 | 叶孙勇 | Non-leakage compound hydro-cylinder |
| CN101929486B (en) * | 2010-08-12 | 2013-05-29 | 湖州机床厂有限公司 | Composite oil cylinder |
| CN102182720A (en) * | 2011-05-05 | 2011-09-14 | 嘉善雪帕尔工具有限公司 | Double-speed oil cylinder |
| CN102162479B (en) * | 2011-05-06 | 2013-01-02 | 浙江浦大液压机械有限公司 | Composite boosting oil cylinder |
| CN202301276U (en) * | 2011-11-04 | 2012-07-04 | 无锡市迅马液压气动有限公司 | Composite cylinder |
| CN208534899U (en) * | 2018-07-25 | 2019-02-22 | 广东锻压机床厂有限公司 | Composite oil cylinder structure |
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2019
- 2019-10-28 CN CN201911033019.5A patent/CN110735825B/en active Active
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| CN110735825A (en) | 2020-01-31 |
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