CN111425483B - Oil cylinder tail end buffering device - Google Patents
Oil cylinder tail end buffering device Download PDFInfo
- Publication number
- CN111425483B CN111425483B CN202010304909.1A CN202010304909A CN111425483B CN 111425483 B CN111425483 B CN 111425483B CN 202010304909 A CN202010304909 A CN 202010304909A CN 111425483 B CN111425483 B CN 111425483B
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- China
- Prior art keywords
- piston
- oil
- right end
- end cover
- buffer
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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
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
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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
- F15B15/1438—Cylinder to end cap 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
- F15B15/08—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
Abstract
The invention discloses an oil cylinder tail end buffering device which comprises a right end cover (1), a cylinder barrel (2), a one-way valve (3), a piston buffering cone (4), a piston (5), a piston rod (6) and an overflow valve (9). According to the invention, through an innovative structural design, the overflow valve is arranged in the piston buffer cone, on one hand, the consumption and absorption of impact energy in the buffer process of the tail end of the oil cylinder are enhanced, and meanwhile, the peak value of impact load in the buffer process of the tail end of the oil cylinder is further limited, so that the safety of the oil cylinder in the working process is fully ensured. The oil cylinder tail end buffer device can be applied to hydraulic dampers and hydraulic buffers besides oil cylinders, and has wide application prospect.
Description
Technical Field
The invention relates to a buffer device for the tail end of an oil cylinder, and belongs to the fields of machinery, hydraulic pressure, buffering and the like.
Background
At present, a hydraulic transmission system is widely applied to various mechanical equipment, and a hydraulic oil cylinder which is usually used as an execution element of the hydraulic system needs to be provided with a buffer device at the tail end of the oil cylinder to prevent a piston from impacting an end cover of the oil cylinder to cause damage to the oil cylinder. The cylinder end buffering device is generally arranged in a throttling damping structure, impact energy of the piston is consumed and absorbed through throttling damping, the size of impact load formed by the throttling damping in the buffering process is related to the movement speed of the piston, and if the movement speed of the piston is larger, the peak value of the impact load formed in the buffering process of the cylinder end becomes larger, and the damage to the cylinder is also caused.
Disclosure of Invention
In order to solve the technical problem, the invention provides a buffer device for the tail end of an oil cylinder.
The technical scheme of the invention is as follows:
a buffer device at the tail end of an oil cylinder comprises a right end cover, a cylinder barrel, a one-way valve, a piston buffer cone, a piston rod and an overflow valve;
an oil cylinder right oil port is machined at the top of the right side of the right end cover, a right end cover first oil through passage is machined below the oil cylinder right oil port, a right end cover buffer cavity is machined in the center of the left end face of the right end cover, a right end cover second oil through passage is machined on the right side of the right end cover buffer cavity, and the oil cylinder right oil port, the right end cover first oil through passage, the right end cover second oil through passage and the right end cover buffer cavity are communicated with one another; the check valve is arranged in the right end cover and is positioned at the upper part of the buffer cavity of the right end cover, an oil outlet of the check valve is communicated to the left end surface of the right end cover through a third oil passage of the right end cover, and an oil inlet of the check valve is communicated with a first oil passage of the right end cover through a fourth oil passage of the right end cover; the piston buffer cone and the piston are processed into a whole; a first buffer cone oil passage is processed at the left part of the piston buffer cone, the overflow valve is arranged in the piston buffer cone, an oil inlet of the overflow valve is communicated with the first buffer cone oil passage through a second buffer cone oil passage, and an oil outlet of the overflow valve is communicated to the right end face of the piston buffer cone through a third buffer cone oil passage; a reliable connection and a reliable seal are formed between the piston rod and the piston; the piston rod, the piston and the piston buffer cone are installed into the cylinder barrel, reliable sealing is formed between the piston and the cylinder barrel, and axial relative motion can be formed between the piston and the cylinder barrel; the right end cover and the cylinder barrel form reliable connection and reliable sealing; when the piston moves from left to right, when the piston buffering cone enters the right end cover buffering cavity, an annular damping flow channel is formed between the outer wall of the cylinder of the piston buffering cone and the wall of the cylinder hole of the right end cover buffering cavity, and an annular buffering cavity is formed between the piston, the piston buffering cone, the cylinder barrel and the right end cover.
The annular damping flow channel can be formed by adopting a method of forming an axial straight groove, an axial spiral groove, a triangular brow groove and the like on the cylindrical outer wall of the piston buffer cone.
The invention has the following beneficial effects:
according to the invention, the overflow valve is arranged in the piston buffer cone, so that on one hand, the consumption and absorption of impact energy in the buffer process of the tail end of the oil cylinder are enhanced, and meanwhile, the peak value of impact load in the buffer process of the tail end of the oil cylinder is further limited, and the safety of the oil cylinder in the working process is fully ensured. The oil cylinder tail end buffer device can be applied to hydraulic dampers and hydraulic buffers besides oil cylinders, and has wide application prospect.
Drawings
The present invention will be described in further detail with reference to the following examples, which are given in the accompanying drawings.
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 2, the oil cylinder tail end buffer device comprises a right end cover 1, a cylinder barrel 2, a one-way valve 3, a piston buffer cone 4, a piston 5, a piston rod 6 and an overflow valve 9;
an oil cylinder right oil port 1-1 is machined at the top of the right side of the right end cover 1, a right end cover first oil through passage 1-2 is machined below the oil cylinder right oil port 1-1, a right end cover buffer cavity 1-4 is machined in the center of the left end face of the right end cover 1, a right end cover second oil through passage 1-3 is machined on the right side of the right end cover buffer cavity 1-4, and the oil cylinder right oil port 1-1, the right end cover first oil through passage 1-2, the right end cover second oil through passage 1-3 and the right end cover buffer cavity 1-4 are communicated with one another; the check valve 3 is arranged in the right end cover 1 and is positioned at the upper part of a buffer cavity 1-4 of the right end cover, an oil outlet of the check valve 3 is communicated to the left end surface of the right end cover 1 through a third oil passage 1-5 of the right end cover, and an oil inlet of the check valve 3 is communicated with a first oil passage 1-2 of the right end cover through a fourth oil passage 1-6 of the right end cover; the piston buffer cone 4 and the piston 5 are processed into a whole; a first buffer cone oil passage 4-1 is processed at the left part of the piston buffer cone 4, the overflow valve 9 is arranged in the piston buffer cone 4, an oil inlet of the overflow valve 9 is communicated with the first buffer cone oil passage 4-1 through a second buffer cone oil passage 4-2, and an oil outlet of the overflow valve 9 is communicated with the right end face of the piston buffer cone 4 through a third buffer cone oil passage 4-3; a reliable connection and a reliable seal are formed between the piston rod 6 and the piston 5; the piston rod 6, the piston 5 and the piston buffer cone 4 are installed into the cylinder barrel 2, reliable sealing is formed between the piston 5 and the cylinder barrel 2, and axial relative motion can be formed between the piston 5 and the cylinder barrel 2; the right end cover 1 and the cylinder barrel 2 form reliable connection and reliable sealing; when the piston 5 moves from left to right, the piston buffering cone 4 enters the right end cover buffering cavity 1-4, an annular damping flow channel 7 is formed between the outer cylindrical wall of the piston buffering cone 4 and the cylindrical hole wall of the right end cover buffering cavity 1-4, and an annular buffering cavity 8 is formed among the piston 5, the piston buffering cone 4, the cylinder barrel 2 and the right end cover 1.
The annular damping flow passage 7 can be formed by forming an axial straight groove, an axial spiral groove, a triangular brow groove and the like on the cylindrical outer wall of the piston buffering cone 4.
The working process is as follows: the piston 5 moves rightwards, when the piston buffer cone 4 does not enter the right end cover buffer cavity 1-4, oil in the oil cylinder on the right side of the piston 5 is discharged through the right end cover buffer cavity 1-4, the right end cover second oil passage 1-3 and the right end cover first oil passage 1-2 through the right oil port 1-1 of the oil cylinder; when the piston buffering cone 4 enters the right end cover buffering cavity 1-4, an annular damping flow passage 7 is formed between the outer cylindrical wall of the piston buffering cone 4 and the cylindrical hole wall of the right end cover buffering cavity 1-4, an annular buffering cavity 8 is formed between the piston 5, the piston buffering cone 4, the cylinder barrel 2 and the right end cover 1, the oil in the annular buffering cavity 8 is extruded to generate higher pressure, if the pressure of the oil in the annular buffering cavity 8 does not reach the overflow pressure set by the overflow valve 9, the pressure oil in the annular buffering cavity 8 can only pass through the annular damping flow passage 7, the right end cover buffering cavity 1-4, the right end cover second oil passage 1-3 and the right end cover first oil passage 1-2 to be discharged through the oil cylinder right oil port 1-1, pressure loss is formed when the oil passes through the annular damping flow passage 7, and the kinetic energy of the piston 5 and related moving parts is gradually consumed and absorbed, the movement speed of the piston 5 and related moving parts is reduced, and the effect of buffering the tail end of the oil cylinder is achieved; if the pressure of the oil in the annular buffer cavity 8 reaches the overflow pressure set by the overflow valve 9, on one hand, the pressure oil in the annular buffer cavity 8 is discharged through the annular damping flow passage 7, the right end cover buffer cavity 1-4, the right end cover second oil passage 1-3 and the right end cover first oil passage 1-2 through the oil cylinder right oil port 1-1, pressure loss is formed when the oil passes through the annular damping flow passage 7, the kinetic energy of the piston 5 and relevant moving parts is gradually consumed and absorbed, the movement speed of the piston 5 and relevant moving parts is reduced, and the effect of buffering at the tail end of the oil cylinder is achieved, on the other hand, the pressure oil in the annular buffer cavity 8 enters the right end cover buffer cavity 1-4 through the buffer cone first oil passage 4-1, the buffer cone second oil passage 4-2, the overflow valve 9 and the buffer cone third oil passage 4-3, the oil is discharged from a right oil port 1-1 of the oil cylinder through a right end cover second oil passage 1-3 and a right end cover first oil passage 1-2, overflow loss is formed when the oil passes through an overflow valve 9, kinetic energy of the piston 5 and related moving parts is consumed and absorbed, the moving speed of the piston 5 and the related moving parts is reduced, and the effect of buffering the tail end of the oil cylinder is achieved; when the piston 5 moves leftwards, oil enters from a right oil port 1-1 of the oil cylinder, on one hand, the oil enters a right end cover buffer cavity 1-4 through a right end cover first oil passage 1-2 and a right end cover second oil passage 1-3; on the other hand, the oil enters the annular buffer cavity 8 through the right end cover first oil passage 1-2, the right end cover fourth oil passage 1-6, the one-way valve 3 and the right end cover third oil passage 1-5, so that the initial speed of the piston 5 moving leftwards is ensured, and the working efficiency of the oil cylinder is improved.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. The utility model provides a terminal buffer of hydro-cylinder which characterized in that: the hydraulic cylinder comprises a right end cover (1), a cylinder barrel (2), a one-way valve (3), a piston buffer cone (4), a piston (5), a piston rod (6) and an overflow valve (9);
an oil cylinder right oil port (1-1) is machined at the top of the right side of the right end cover (1), a right end cover first oil through passage (1-2) is machined below the oil cylinder right oil port (1-1), a right end cover buffer cavity (1-4) is machined in the center of the left end face of the right end cover (1), a right end cover second oil through passage (1-3) is machined on the right side of the right end cover buffer cavity (1-4), and the oil cylinder right oil port (1-1), the right end cover first oil through passage (1-2), the right end cover second oil through passage (1-3) and the right end cover buffer cavity (1-4) are communicated with one another; the check valve (3) is arranged in the right end cover (1) and is positioned at the upper part of a buffer cavity (1-4) of the right end cover, an oil outlet of the check valve (3) is communicated to the left end surface of the right end cover (1) through a third through oil way (1-5) of the right end cover, and an oil inlet of the check valve (3) is communicated with a first through oil way (1-2) of the right end cover through a fourth through oil way (1-6) of the right end cover; the piston buffer cone (4) and the piston (5) are processed into a whole; a first buffer cone oil passage (4-1) is machined in the left part of the piston buffer cone (4), the overflow valve (9) is arranged in the piston buffer cone (4), an oil inlet of the overflow valve (9) is communicated with the first buffer cone oil passage (4-1) through a second buffer cone oil passage (4-2), and an oil outlet of the overflow valve (9) is communicated to the right end face of the piston buffer cone (4) through a third buffer cone oil passage (4-3); a reliable connection and a reliable seal are formed between the piston rod (6) and the piston (5); the piston rod (6), the piston (5) and the piston buffer cone (4) are installed into the cylinder barrel (2), reliable sealing is formed between the piston (5) and the cylinder barrel (2), and axial relative motion can be formed between the piston (5) and the cylinder barrel (2); the right end cover (1) and the cylinder barrel (2) form reliable connection and reliable sealing; when the piston (5) moves from left to right, when the piston buffering cone (4) enters the right end cover buffering cavity (1-4), an annular damping flow channel (7) is formed between the outer wall of the cylinder of the piston buffering cone (4) and the wall of the cylinder of the right end cover buffering cavity (1-4), and an annular buffering cavity (8) is formed among the piston (5), the piston buffering cone (4), the cylinder barrel (2) and the right end cover (1).
2. The cylinder end cushioning device of claim 1, wherein: the annular damping flow channel (7) can be formed by adopting a method of forming an axial straight groove, an axial spiral groove, a triangular brow groove and the like on the cylindrical outer wall of the piston buffer cone (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304909.1A CN111425483B (en) | 2020-04-17 | 2020-04-17 | Oil cylinder tail end buffering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010304909.1A CN111425483B (en) | 2020-04-17 | 2020-04-17 | Oil cylinder tail end buffering device |
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| Publication Number | Publication Date |
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| CN111425483A CN111425483A (en) | 2020-07-17 |
| CN111425483B true CN111425483B (en) | 2022-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010304909.1A Active CN111425483B (en) | 2020-04-17 | 2020-04-17 | Oil cylinder tail end buffering device |
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| CN (1) | CN111425483B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048120A (en) * | 2021-04-15 | 2021-06-29 | 南京工业职业技术大学 | Industrial double-acting air cylinder |
| CN117588460B (en) * | 2024-01-18 | 2024-03-29 | 徐州金鼎恒立液压件有限公司 | Hydraulic cylinder retarding protection device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE758207A (en) * | 1969-11-25 | 1971-04-01 | Weyman Henry W | PNEUMATIC CYLINDER ASSEMBLIES |
| CN101737376B (en) * | 2009-11-03 | 2012-08-15 | 宜昌市燕狮科技开发有限责任公司 | Low-speed bidirectional regulating hydraulic buffer |
| FR2973454B1 (en) * | 2011-03-31 | 2014-03-28 | Messier Bugatti | HYDRAULIC ACTUATOR WITH AUTOMATIC PURGE AT THE END OF THE RACE. |
| CN104612773B (en) * | 2015-01-26 | 2017-02-22 | 吉林大学 | Gas intake and distribution system based on electric hydraulic control mode |
| CN206352600U (en) * | 2016-12-30 | 2017-07-25 | 湖北精功科技有限公司 | A kind of rubbish precompressed station Load Relief System |
| CN207975065U (en) * | 2017-12-25 | 2018-10-16 | 武汉理工大学 | A kind of axial direction hydrostatic support buffering hydraulic cylinder |
| CN107939766A (en) * | 2017-12-28 | 2018-04-20 | 邵立坤 | A kind of oil supplementation buffer valve |
| CN108386415A (en) * | 2018-05-30 | 2018-08-10 | 湖南三港口设备有限公司 | A kind of anticollision oil cylinder and engineering machinery |
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