CN104632775A - Hydraulic cylinder buffer device - Google Patents
Hydraulic cylinder buffer device Download PDFInfo
- Publication number
- CN104632775A CN104632775A CN201310559506.1A CN201310559506A CN104632775A CN 104632775 A CN104632775 A CN 104632775A CN 201310559506 A CN201310559506 A CN 201310559506A CN 104632775 A CN104632775 A CN 104632775A
- Authority
- CN
- China
- Prior art keywords
- buffer
- buffer plunger
- cylinder
- plunger
- throttling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/227—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having an auxiliary cushioning piston within the main piston or the cylinder end face
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 a hydraulic cylinder buffer device. The hydraulic cylinder buffer device comprises a buffer plunger extending out of the end of a piston rod, wherein the end of the buffer plunger is provided with a stop shoulder, and the buffer plunger is sleeved with a reset spring and a buffer sleeve capable of axially sliding along the buffer plunger; the buffer plunger is a cylinder, and the center of the buffer plunger is axially provided with a throttling pore passage; radial throttling buffer holes are evenly distributed in the circumferential wall of the throttling pore passage. The hydraulic cylinder buffer device is simple and compact in structure, required parts are low in manufacturing accuracy and good in interchangeability, and once a certain part loses efficacy, the part can be replaced conveniently in time; the buffer effect is smooth, and a piston is prevented from getting stuck; in the buffer process, the piston rod will not deflect, and it is guaranteed that a sealing surface is firm.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, especially relate to a kind of cylinder cushion device.
Background technique
The cylinder cushion device that present stage is commonly used is buffer rubber gasket, damping spring, hydraulic cushion.Wherein hydraulic cushion is a kind of other two classes damping devices comprehensive and make use of incompressibility and the mobility of liquid, to some extent solves deficiency and the defect of the existence of other devices.In hydraulic cushion, the most frequently used device is exactly damping device in cylinder, namely utilize the buffer plunger that is connected with piston rod and and the cushion hole of cylinder bottom between gap, produce throttle effect, thus realize the object of buffering.But in large load, Long Distances oil cylinder, due to the restriction of piston rod deadweight, depart from the effect lower piston rod of gravity and inertial force and cause buffer plunger to insert in cushion hole smoothly, thus cause oil hydraulic cylinder normally to use.On the other hand in order to better cushioning effect, buffer plunger needs variable cross section to design, and this just proposes high requirement to its accuracy of manufacturing.Due to the problems referred to above, further developing of the large load of very big restriction, large travel high-speed hydraulic jack.
Summary of the invention
The object of this invention is to provide a kind of cylinder cushion device, the damping mechanism of this hydraulic jack can form good cushioning effect under the high-speed condition of large load, Long Distances, thus reaches the object of the physical life extending oil hydraulic cylinder.And the structure of this hydraulic jack is simple, and each part is easy to large batch of production and manufacture.
The present invention is achieved by the following technical solutions: a kind of cylinder cushion device, comprise the buffer plunger extended by piston rod end, the end of described buffer plunger is provided with only shoulder, and the outer cover of described buffer plunger is equipped with Returnning spring and can along buffer plunger cushion collar in axial sliding; Described buffer plunger is cylindrical body, and its central shaft is to being provided with throttling duct; The throttling buffering hole of the uniform radial direction of perisporium in described throttling duct.
Described damping device is located between cylinder barrel and cylinder bottom.
The diameter of described only shoulder is less than the diameter of the oil discharge passage of cylinder bottom; The diameter of described cushion collar is greater than the diameter of the oil discharge passage of cylinder bottom.
Described only shoulder adopts the form of card key to be connected with buffer plunger.
Described cushion collar internal diameter and buffer plunger adopt small―gap suture to coordinate, and cushion collar can be slid axially on buffer plunger.
The invention has the beneficial effects as follows: a kind of cylinder cushion device is simple and compact for structure, required part accuracy of manufacturing is low, interchangeability good, changes in time once certain part failure is convenient.Cushioning effect is smooth-going, avoids piston clamping stagnation, and the throttle orifice on described buffer plunger is arranged between cushion collar and buffer plunger, thus after cushion collar forms airtight space towards the end face of cylinder bottom and cylinder bottom end face, forms throttling passage, avoids piston clamping stagnation; The area of the throttling passage that described throttle orifice is formed can reduce gradually along with the carrying out of piston retraction movement, and the resistance that piston continues to retract strengthens gradually, and the movement velocity of piston reduces, thus obtains good cushioning effect.In buffering course can not there is deflection in piston rod, guarantee sealing surface is firm, the effect of balance oil hole can be played along the radially-arranged throttle orifice of buffer plunger simultaneously, fluid is uniformly distributed at cushion collar and buffer plunger and piston cylinder aperture surface place, thus can not run-off the straight time laminatings in the relative cylinder bottom face of cushion collar and cylinder bottom face.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural drawing of cylinder cushion device.
Fig. 2 is the structural representation of piston rod.
Fig. 3 is the A-A direction view of piston rod.
In figure, 1. damping device, 1-1. cushion collar, 1-2. Returnning spring, 1-3. buffer plunger, 1-3-1. throttling duct, 1-3-2. throttling buffering hole, 1-4. is shoulder only, 2. cylinder barrel, 2-1. rod chamber, 2-2. rodless cavity, 3. piston, 4. piston rod, 5. cylinder bottom, 5-1. oil outlet, 5-2. oil discharge passage.
Embodiment
In the accompanying drawings, a kind of cylinder cushion device, comprise the buffer plunger 1-3 extended by piston rod 4 end, the end of described buffer plunger 1-3 is provided with only takes on 1-4, and the outer cover of described buffer plunger 1-3 is equipped with Returnning spring 1-2 and can along buffer plunger 1-3 cushion collar 1-1 in axial sliding; Described buffer plunger 1-3 is cylindrical body, and its central shaft is to being provided with throttling duct 1-3-1; The throttling buffering hole 1-3-2 of the uniform radial direction of perisporium of described throttling duct 1-3-1.
Described damping device 1 is located between cylinder barrel 2 and cylinder bottom 5.
The diameter of described only shoulder 1-4 is less than the diameter of the oil discharge passage 1-2 of cylinder bottom 5; The diameter of described cushion collar 1-1 is greater than the diameter of the oil discharge passage 1-2 of cylinder bottom 1.
Described only shoulder 1-4 adopts the form of card key to be connected with buffer plunger 1-3.
Described cushion collar 1-1 internal diameter adopts small―gap suture to coordinate with buffer plunger 1-3, and cushion collar 1-1 can be slid axially on buffer plunger 1-3.
Working principle of the present invention is: cylinder barrel 2 is separated into rod chamber 2-1 and rodless cavity 2-2 by piston 3, piston rod 4 retraction movement to terminal position time, cushion collar 1-1 and cylinder bottom 1 end face form airtight; Buffer solution force feed in rodless cavity 2-2 produces high pressure under the promotion of piston 3, cushion collar 1-1 can be made more firmly to be attached on cylinder bottom 5 end face towards the end face of cylinder bottom 5, the sealing of the two is increased.Because the sealing surface of above-mentioned partition oil circuit is formed, hydraulic oil can only be flowed out by the throttling duct 1-3-1 of buffer plunger 1-3 and throttling buffering hole 1-3-2, because the diameter of throttling duct 1-3-1 and throttling buffering hole 1-3-2 is very little, hydraulic oil passing capacity is limited, piston 3 is moved and must be subject to great resistance, thus play the effect of buffering.Along with buffer plunger 1-3 progressively enters oil discharge passage 1-2, the area of the throttling passage that throttling duct 1-3-1 is formed gradually reduces, and now cushioned resistance progressively becomes large, thus can obtain good cushioning effect.
Claims (5)
1. a cylinder cushion device, it is characterized in that, comprise the buffer plunger (1-3) extended by piston rod (4) end, the end of described buffer plunger (1-3) is provided with only shoulder (1-4), and the outer cover of described buffer plunger (1-3) is equipped with Returnning spring (1-2) and can along buffer plunger (1-3) cushion collar (1-1) in axial sliding; Described buffer plunger (1-3) is cylindrical body, and its central shaft is to being provided with throttling duct (1-3-1); The throttling buffering hole (1-3-2) of the uniform radial direction of perisporium of described throttling duct (1-3-1).
2. a kind of cylinder cushion device according to claim 1, it is characterized in that, described damping device (1) is located between cylinder barrel (2) and cylinder bottom (5).
3. a kind of cylinder cushion device according to claim 1, is characterized in that, the diameter of described only shoulder (1-4) is less than the diameter of the oil discharge passage (1-2) of cylinder bottom (5); The diameter of described cushion collar (1-1) is greater than the diameter of the oil discharge passage (5-2) of cylinder bottom (5).
4. a kind of cylinder cushion device according to claim 1, is characterized in that, described only shoulder (1-4) adopts the form of card key to be connected with buffer plunger (1-3).
5. a kind of cylinder cushion device according to claim 1, it is characterized in that, described cushion collar (1-1) internal diameter adopts small―gap suture to coordinate with buffer plunger (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310559506.1A CN104632775A (en) | 2013-11-12 | 2013-11-12 | Hydraulic cylinder buffer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310559506.1A CN104632775A (en) | 2013-11-12 | 2013-11-12 | Hydraulic cylinder buffer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104632775A true CN104632775A (en) | 2015-05-20 |
Family
ID=53211885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310559506.1A Pending CN104632775A (en) | 2013-11-12 | 2013-11-12 | Hydraulic cylinder buffer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104632775A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302092A (en) * | 2018-04-10 | 2018-07-20 | 徐州徐工液压件有限公司 | A kind of detachable buffer unit of excavator hydraulic cylinder |
-
2013
- 2013-11-12 CN CN201310559506.1A patent/CN104632775A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302092A (en) * | 2018-04-10 | 2018-07-20 | 徐州徐工液压件有限公司 | A kind of detachable buffer unit of excavator hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |