CN104747534B - Impact buffering device of hydraulic cylinder - Google Patents
Impact buffering device of hydraulic cylinder Download PDFInfo
- Publication number
- CN104747534B CN104747534B CN201310753041.3A CN201310753041A CN104747534B CN 104747534 B CN104747534 B CN 104747534B CN 201310753041 A CN201310753041 A CN 201310753041A CN 104747534 B CN104747534 B CN 104747534B
- Authority
- CN
- China
- Prior art keywords
- groove
- piston rod
- ball
- pressure release
- flange
- 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.)
- Expired - Fee Related
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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
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
Abstract
The invention relates to an impact buffering device of a hydraulic cylinder. The impact buffering device is provided with an outer cylinder and a piston rod, one end of the piston rod is arranged in the outer cylinder and provided with a piston, the piston is provided with a combining portion and a mobility portion, the combining portion is provided with a combining groove, a ball groove, a plurality of lateral pressure release holes, a pressure release ball and an elastic element, and the mobility portion is formed at one end of the combining portion with the ball groove and is provided with a storage groove, an oil stop ring, a central groove, a plurality of first oil guide holes and second oil guide holes, the storage groove is arranged in the outer surface of the mobility portion, a first flange and a second flange are formed on two sides of the storage groove respectively, each first oil guide hole penetrates the first flange to be communicated with the storage groove, and each second oil guide hole penetrates the second flange to be communicated with the storage groove. Accordingly, the impact buffering device of the hydraulic cylinder can alleviate impact.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder relief means, more particularly to a kind of hydraulic cylinder punching for slowing down impact phenomenon
Hit buffer unit.
Background technology
Existing cylinder cushion device is predominantly provided with an outer cylinder body and a piston rod, and the wherein outer cylinder body is a hollow pipe
Body and in one hydraulic oil of internal reservoir, and one end of the piston rod is to be slidingly disposed in the outer shell body and being provided with a piston,
Internal diameter of the external diameter of the piston less than the outer cylinder body, to pass through the piston by the hydraulic oil in the outer shell body respectively at the piston
Both sides are flowed, and when the piston rod is moved relative to the outer cylinder body, hydraulic oil can produce flowing via the piston, by hydraulic oil
The effect that the hydraulic pressure produced by the piston can provide the buffering of piston rod one is flowed through, wherein existing piston is mainly in middle section ring
Shape is arranged with a containing groove, and an only oil ring that can mutually recline with the outer cylinder body inner surface, the piston are arranged with the containing groove
Another extending through in two sides of the containing groove is provided with multiple oil guiding holes communicated with the containing groove, wherein positioned at the containing groove two
The internal diameter size of the oil guiding hole of side is differed, and makes hydraulic oil flow in the oil guiding hole of different inner diameters size, and then allows the work
Stopper rod has different speed at different motion direction, to reach the function of a buffering；
However, existing cylinder cushion device can be installed on a track, and then it is slow to provide door-plate one by the piston rod
The effect of punching, but be only applicable to when the piston rod is subject to less external force, the hydraulic oil in the outer shell body can be swimmingly
Flow between the oil guiding hole of different inner diameters size, but when piston rod is subject to larger external force, hydraulic oil cannot within the short time by
When the oil guiding hole of little internal diameter flows to the oil guiding hole of large diameter, because hydraulic oil cannot make the movement of the piston rod swimmingly flowing
Speed causes excessive drop with door-plate speed, and then causes showing for door-plate sharp pounding because of the speed dramatic decrease of door-plate
As, that is, when the piston rod is subject to larger external force, then existing cylinder cushion device cannot effectively provide the piston rod one
The effect of buffering, therefore, there are improvements in addition for the technology of existing cylinder cushion device.
The content of the invention
To solve existing cylinder cushion device when larger external force is born, hydraulic oil cannot swimmingly flow and make the work
Stopper rod produces excessive drop with the speed of door-plate, it is impossible to the defect of one buffering effect of door-plate is effectively provided via the piston rod
And it is not enough, to provide a kind of hydraulic cylinder relief means, which can work as the hydraulic cylinder relief means and hold the purpose of the present invention
During by larger external force, hydraulic oil swimmingly can flow to the opposite side of piston via other passages, and when external force is reduced
The passage is automatically switched off, is prevented effectively from when piston rod speed is excessive with door-plate velocity head, the door-plate can produce showing for vibrations
As effectively to provide the purpose of one buffering effect of door-plate.
Based on object defined above, the present invention with technical scheme be that a kind of hydraulic cylinder relief means are provided, its
An outer cylinder body and a piston rod are provided with, wherein:The outer cylinder body is a hollow body and is provided with a perforate in one end；The work
One end Jing perforates of stopper rod and be stretched in the outer shell body and be provided with a piston in the end, the piston be provided with a joint portion and
One flow portion, the joint portion are combined with the piston rod and are provided with an engagement groove, a ball groove, multiple side relief holes, a pressure release ball
And a flexible member, the engagement groove is axially recessed to combine in the joint portion and with the piston rod, the ball groove axially it is recessed in
The other end of the joint portion and communicate with the engagement groove, each side relief hole radially and be spaced located at the joint portion outer surface and with
The ball groove is communicated, the pressure release ball in the ball groove and between each side relief hole, the flexible member in the ball groove and
Lean with the pressure release ball and the piston rod, make the pressure release ball relative with each side relief hole；And the flow portion is formed at this
Joint portion is provided with the external diameter of one end of ball groove and external diameter more than the joint portion, the flow portion be provided with a containing groove, one only oil ring, one
Central channel, multiple first oil guiding holes and multiple second oil guiding holes, the recessed appearance in the flow portion middle section of containing groove annular
Face, makes the flow portion form one first flange and one second flange respectively in the both sides of the containing groove, and first flange is close should
Each side relief hole of joint portion, only oil ring should be sheathed in the containing groove and mutually be reclined with the inner surface of the outer cylinder body, and can
Mutually recline with first flange or second flange, the central channel axially penetrate through the flow portion and can the Jing pressure release balls movement and
Communicate with each side relief hole, wherein the pushing and pressing of the pressure release ball warp flexible member, can close between the central channel and each side relief hole
Path, and the pressure release ball is relative with each side relief hole, can be direct when hydraulic oil is flowed out from central channel and touches pressure release ball
Flowed out by each side relief hole, will not allow hydraulic oil that pressure release ball surface is first flowed through in ball groove and be flowed out by each side relief hole again, use
Avoid producing noise because of pressure release ball fast vibration, each first oil guiding hole is radially and compartment of terrain is through first flange and the appearance
If groove is communicated, and each second oil guiding hole is radially and compartment of terrain is run through second flange and communicated with the containing groove, wherein each second
Oil guiding hole has different internal diameters from each first oil guiding hole.
Further, internal diameter of the internal diameter of each second oil guiding hole more than each first oil guiding hole.
Further, the outer cylinder body is being provided with an oil sealing near the tapping, and one end Jing outer shells of the piston rod
Perforate and the oil sealing of body and be stretched in the outer shell body.
It is preferred that the outer cylinder body is provided with a joint head in the other end.
It is preferred that the piston rod stretches into the outer surface of outer cylinder body one end is provided with an external screw thread, and the combination of the joint portion
Groove is provided with a female thread being screwed with the piston rod external screw thread in inner surface.
It is preferred that the pressure release ball is located in the ball groove and resists the central channel, with blocked center groove and each side pressure release
Passage between hole, the flexible member are located between the pressure release ball and the piston rod.
By above-mentioned technical scheme, the beneficial effect and advantage effect of present hydraulic cylinder relief means are:
1st, hydraulic oil smooth outflow：The hydraulic cylinder relief means of the present invention by arrange on the piston oil guiding hole,
Containing groove, central channel, pressure release ball, the isostructural mode of side relief hole, allow piston rod can be via oil guiding hole by less external force
And containing groove is flowed, and can be flowed via oil guiding hole, containing groove, central channel and side relief hole simultaneously in larger external force
Dynamic, the hydraulic oil allowed in outer shell body swimmingly flows, to provide the buffering effect needed for door-plate.
2nd, slow down impact phenomenon：When the piston rod be subject to larger external force and when the outer cylinder body relative movement, positioned at the work
The hydraulic oil of plug flow portion side is except flowing to the work via each second oil guiding hole, the containing groove and each first oil guiding hole
The side of plug joint portion, also can flow to the joint portion side of the piston via the central channel and each side relief hole, without
Such as existing cylinder cushion device because hydraulic oil swimmingly cannot flow, and make the piston rod excessive with the velocity head of door-plate,
And then allow door-plate to produce the phenomenon of sharp pounding.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of the present invention.
Fig. 2 is the cross sectional side view of the present invention.
Fig. 3 is the enlarged local section side view of the present invention.
Fig. 4 is liquid flowing side view when inventive piston bar is pulled with respect to outer cylinder body.
Fig. 5 is that inventive piston bar is extruded liquid flowing side view when phase is moved to outer cylinder body by less external force.
Fig. 6 is that inventive piston bar is extruded liquid flowing side view when phase is moved to outer cylinder body by larger external force.
Critical piece symbol description：
10 outer cylinder body, 11 joint head
12 perforate, 13 oil sealing
20 piston rod, 21 external screw thread
30 piston, 31 joint portion
311 engagement groove, 312 ball groove
313 side relief hole, 314 pressure release ball
315 flexible member, 316 female thread
32 flow portion, 321 containing groove
322 stop 323 central channel of oil ring
324 first oil guiding hole, 325 second oil guiding hole
326 first flange, 327 second flange.
Specific embodiment
With the following drawings and preferred embodiments of the present invention, the present invention is expanded on further to reach predetermined goal of the invention institute
The technological means taken.
For the technical characteristic and practical effect of the present invention can be understood in detail, and can implement according to the content of description,
This is described in detail as after further with preferred embodiment as shown in drawings, refer to liquid of the invention as shown in Figure 1 to Figure 3
The embodiment of cylinder pressure relief means, the hydraulic cylinder relief means are provided with an outer cylinder body 10 and a piston rod 20, wherein:
The outer cylinder body 10 is a hollow body, and one end of the outer cylinder body 10 is provided with a joint head 11, and the outer cylinder body 10
The other end be provided with a perforate 12, further, the outer cylinder body 10 is being provided with an oil sealing 13 at the perforate 12；
And one end Jing of the piston rod 20 perforates 12 and oil sealing 13 and be stretched in the outer cylinder body 10 and on the end
A piston 30 is provided with, it is preferred that the piston rod 20 stretches into the outer surface of 10 one end of outer cylinder body is provided with an external screw thread 21, the piston 30
A joint portion 31 and a flow portion 32 are provided with, the joint portion 31 is combined with the piston rod 20 and is provided with an engagement groove 311, a ball
Groove 312, multiple side relief holes 313, a pressure release ball 314 and a flexible member 315, the wherein engagement groove 311 are axially recessed in this
Combine in joint portion 31 and with the piston rod 20, further, the engagement groove 311 is provided with outside one and the piston rod 20 in inner surface
The female thread 316 that screw thread 21 is screwed, and the ball groove 312 axially the recessed other end in the joint portion 31 and with the engagement groove
311 communicate, and each side relief hole 313 is radially and interval is located at the outer surface of the joint portion 31 and is communicated with the ball groove 312, the pressure release
Ball 314 in the ball groove 312 and between each side relief hole 313, the flexible member 315 in the ball groove 312 and with
The pressure release ball 314 and the piston rod 20 lean, and make the pressure release ball 314 relative with each side relief hole 313.
The flow portion 32 is formed at that the joint portion 31 is provided with one end of ball groove 312 and external diameter is outer more than the joint portion 31
Footpath, the flow portion 32 are provided with a containing groove 321, only oil ring 322, a central channel 323, multiple first oil guiding holes 324 and multiple
Second oil guiding hole 325, the wherein recessed outer surface in 32 middle section of flow portion of 321 annular of containing groove, make the flow portion 32
One first flange 326 and one second flange 327 are formed respectively in the both sides of the containing groove 321, and wherein first flange 326 is close
Each side relief hole 313 of the joint portion 31, should only oil ring 322 be sheathed in the containing groove 321 of the flow portion 32 and with the outer shell
The inner surface of body 10 mutually reclines, and can mutually recline with first flange 326 or second flange 327, and to allow, to be stored in this outer
Hydraulic oil in cylinder body 10 can flow in 30 two ends of piston, the central channel 323 axially penetrate through the flow portion 32 and with the flowing
Portion 32 is concentric setting, enables the movement of 323 Jing of the central channel pressure release balls 314 and communicates with each side relief hole 313, wherein
The pushing and pressing of 314 Jing of the pressure release ball flexible members 315, can close the path between the central channel 323 and each side relief hole 313, respectively
First oil guiding hole 324 is radially and compartment of terrain is run through first flange 326 and communicated with the containing groove 321, and each second oil guiding hole
325 radially and compartment of terrain is run through second flange 327 and communicated with the containing groove 321, wherein the internal diameter of each second oil guiding hole 325
More than the internal diameter of each first oil guiding hole 324, further, two flanges as shown in Figure 3 326,327 respectively with table in the outer cylinder body 10
There is between face a gap, in addition, the structural relation for making the pressure release ball 314 relative with each side relief hole 313, when hydraulic oil is from center
Groove 323 directly can be gone out by each side relief hole stream 313 when flowing out and touching pressure release ball 314, will not allow hydraulic oil in ball groove 312
First flow through 314 surface Zai Youge sides relief hole 313 of pressure release ball to flow out, to avoid producing noise because of 314 fast vibration of pressure release ball.
Present hydraulic cylinder relief means when in use, please refer to as shown in figure 4, wherein when 20 phase of piston rod
When pulled out to the outer cylinder body 10 outwardly, the piston 30 the relative outer cylinder body 10 can slide with piston rod 20, and be located at the appearance
If the only oil ring 322 in groove 321 is because mutually reclining with 10 inner surface of outer cylinder body, can be with 327 phase of the second flange of the flow portion 32
Against, make hydraulic oil positioned at 30 joint portion of the piston, 31 side via each first oil guiding hole 324, first flange 326 with should
Gap, the containing groove 321 and each second oil guiding hole 325 between 10 inner surface of outer cylinder body and flow to 30 flow portion 32 of piston
Side, wherein as the internal diameter of each second oil guiding hole 325 is more than the internal diameter of each first oil guiding hole 324, making the piston rod 20 relative
When the outer cylinder body 10 is pulled out outwardly, hydraulic oil rapidly can flow to the flow portion 32 1 by 31 side of joint portion of the piston 30
Side.
Please refer to as shown in figure 5, when the piston rod 20 be subject to less external force and when moving towards inside the outer cylinder body 10,
The piston 30 the relative outer cylinder body 10 can slide with piston rod 20, now, the only oil ring 322 in the containing groove 321
Because mutually reclining with 10 inner surface of outer cylinder body, can lean with the first flange 326 of the flow portion 32, make to flow positioned at the piston 30
Between the hydraulic oil of 32 side of dynamic portion is via between each second oil guiding hole 325, second flange 327 and 10 inner surface of outer cylinder body
Gap, the containing groove 321 and each first oil guiding hole 324 and flow to the side of 30 joint portion 31 of piston, allow 20 phase of piston rod
To, during the retraction inwardly of outer cylinder body 10, hydraulic oil slower speeds can flow to the joint portion 31 by 32 side of flow portion of the piston 30
Side, wherein as hydraulic oil is each first oil guiding hole 324 that little internal diameter is flowed to by each second oil guiding hole 325 of large diameter,
Therefore, the hydraulic oil can produce a hydraulic pressure and provide the effect of the buffering of piston rod 20 1.
In addition, when the piston rod 20 is subject to larger external force as shown in Figure 6 and moves towards inside the outer cylinder body 10, the piston
30 the relative outer cylinder body 10 can slide with piston rod 20, now, the only oil ring 322 in the containing groove 321 because with this
10 inner surface of outer cylinder body mutually reclines, and can lean with the first flange 326 of the flow portion 32, make positioned at 30 flow portion 32 of the piston
The hydraulic oil of side is except flowing to this via each second oil guiding hole 325, the containing groove 321 and each first oil guiding hole 324
The side of 30 joint portion 31 of piston, allows the piston rod 20 with respect to during the retraction inwardly of outer cylinder body 10, and hydraulic oil can be by the piston 30
32 side of flow portion flow to 31 side of joint portion, wherein because external force cross ambassador originally via each second oil guiding hole 325, should
The hydraulic oil that gap, containing groove 321 and each first oil guiding hole 324 between the second flange 327 and 10 inner surface of outer cylinder body is flow through,
Be not enough to cut out the pressure of external force, and unnecessary pressure can make hydraulic oil 314 court of pressure release ball be promoted via the central channel 323
20 direction of piston rod is moved and compresses the flexible member 315, allows the central channel 323 to communicate with each side relief hole 313, now,
Also the piston 30 can be flowed to via the central channel 323 and each side relief hole 313 positioned at the 32 side hydraulic oil of flow portion
31 side of joint portion, consequently, it is possible to the hydraulic oil for being located at 30 flow portion of piston, 32 side not only can be by each second oil guiding hole
325th, containing groove 321 and each first oil guiding hole 324 flow to 31 side of joint portion of the piston 30, also can be via the central channel
323 and each side relief hole 313 and flow to 31 side of joint portion of the piston 30, when pressure cut down to a certain degree after, the pressure
The flexible member 315 of contracting can promote the pressure release ball 314 to recover to initial position, be let out with each side with being automatically switched off the central channel 323
Path between pressure hole 313, therefore, when the piston rod 20 of the present invention is subject to larger external force, hydraulic oil not only still can smooth DIYU
Flowing in the outer cylinder body 10, while the effect of the buffering of door-plate one is provided via the piston rod 20, it is slow without such as existing hydraulic cylinder
Flushing device swimmingly cannot flow because of hydraulic oil, make the piston rod 20 excessive with the velocity head of door-plate, cause door-plate to produce strong
The dynamic phenomenon of violent shock.
The above is only presently preferred embodiments of the present invention, and any pro forma restriction is not done to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any those skilled in the art, not
Depart from technical solution of the present invention in the range of, when using the technology contents of the disclosure above make it is a little change or be modified to equivalent
The Equivalent embodiments of change, as long as being the content without departing from technical solution of the present invention, according to the technical spirit of the present invention to the above
Any simple modification, equivalent variations and modification that embodiment is made, still fall within the range of technical solution of the present invention.
Claims (8)
1. a kind of hydraulic cylinder relief means, it is characterised in that described device is provided with an outer cylinder body and a piston rod, wherein:
The outer cylinder body is a hollow body and is provided with a perforate in one end；
One end Jing perforates of the piston rod and be stretched in the outer shell body and be provided with a piston in the end, the piston is provided with
One joint portion and a flow portion, the joint portion are combined with the piston rod and are provided with an engagement groove, a ball groove, multiple side pressure releases
Hole, a pressure release ball and a flexible member, the engagement groove is axially recessed to combine in the joint portion and with the piston rod, the ball groove
Axially the recessed other end in the joint portion and communicate with the engagement groove, each side relief hole radially and is spaced located at the joint portion
Outer surface and communicate with the ball groove, in the ball groove and between each side relief hole, the flexible member is located at the pressure release ball
Lean in the ball groove and with the pressure release ball and the piston rod, make the pressure release ball relative with each side relief hole；And
The flow portion be formed at the joint portion be provided with ball groove one end and external diameter more than the joint portion external diameter, the flow portion sets
There are a containing groove, one to stop oil ring, a central channel, multiple first oil guiding holes and multiple second oil guiding holes, the containing groove annular is recessed
In the outer surface of the flow portion middle section, the flow portion is made to form one first flange and one second respectively in the both sides of the containing groove
Flange, each side relief hole of first flange near the joint portion, should only oil ring be sheathed in the containing groove and with the outer cylinder body
Inner surface mutually recline, and can mutually recline with first flange or second flange, the central channel axially penetrates through the flowing
Portion and can the Jing pressure release balls movement and communicate with each side relief hole, the wherein pushing and pressing of the pressure release ball warp flexible member can be sealed
The path between the central channel and each side relief hole is closed, each first oil guiding hole is radially and compartment of terrain is through first flange and the appearance
If groove is communicated, and each second oil guiding hole is radially and compartment of terrain is run through second flange and communicated with the containing groove, wherein each second
Oil guiding hole has different internal diameters from each first oil guiding hole；
Internal diameter of the internal diameter of each second oil guiding hole more than each first oil guiding hole.
2. hydraulic cylinder relief means according to claim 1, it is characterised in that the outer cylinder body is near the perforate
Place is provided with an oil sealing, and perforate and the oil sealing of one end Jing outer cylinder body of the piston rod and be stretched in the outer shell body.
3. hydraulic cylinder relief means according to claim 2, it is characterised in that the outer cylinder body is provided with the other end
One joint head.
4. hydraulic cylinder relief means according to claim 3, it is characterised in that the piston rod stretches into outer cylinder body one
The outer surface at end is provided with an external screw thread, and the engagement groove of the joint portion is provided with one in inner surface and is screwed with the piston rod external screw thread
Female thread.
5. hydraulic cylinder relief means according to claim 4, it is characterised in that the pressure release ball is located in the ball groove
And resist the central channel, with the passage between blocked center groove and each side relief hole, the flexible member be located at the pressure release ball and
Between the piston rod.
6. hydraulic cylinder relief means according to claim 1, it is characterised in that the outer cylinder body is provided with the other end
One joint head.
7. hydraulic cylinder relief means according to claim 1 and 2, it is characterised in that the piston rod stretches into outer shell
The outer surface of body one end is provided with an external screw thread, and the engagement groove of the joint portion is provided with one with the piston rod external screw thread phase in inner surface
The female thread for screwing togather.
8. hydraulic cylinder relief means according to claims 1 to 3 any of which item, it is characterised in that the pressure release
Ball is located in the ball groove and resists the central channel, with the passage between blocked center groove and each side relief hole, the flexible member
Between the pressure release ball and the piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753041.3A CN104747534B (en) | 2013-12-27 | 2013-12-27 | Impact buffering device of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310753041.3A CN104747534B (en) | 2013-12-27 | 2013-12-27 | Impact buffering device of hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104747534A CN104747534A (en) | 2015-07-01 |
| CN104747534B true CN104747534B (en) | 2017-04-12 |
Family
ID=53587669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310753041.3A Expired - Fee Related CN104747534B (en) | 2013-12-27 | 2013-12-27 | Impact buffering device of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747534B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006009A (en) * | 2017-11-29 | 2018-05-08 | 重庆维庆液压机械有限公司 | A kind of cylinder cushion device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202016100443U1 (en) | 2015-12-23 | 2016-02-16 | Abb Technology Ag | Storage module for a hydro-mechanical spring-loaded drive |
| CN105465098A (en) * | 2015-12-31 | 2016-04-06 | 上海盾克机械有限公司 | Buffer structure device used for spiral swing hydraulic cylinder |
| CN110848309A (en) * | 2019-11-19 | 2020-02-28 | 李茂强 | Pressure-controllable oil buffer |
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| CN2193911Y (en) * | 1994-06-15 | 1995-04-05 | 常州气弹簧厂 | Controllable door closer |
| CN1912417A (en) * | 2005-08-11 | 2007-02-14 | 共荣工业株式会社 | Liquid damper |
| CN101852050A (en) * | 2009-03-30 | 2010-10-06 | 稳多企业股份有限公司 | Slow and smooth automatic door closing device |
| CN102203369A (en) * | 2008-10-23 | 2011-09-28 | 拉玛德卡尼股份公司 | Damper |
| CN202273526U (en) * | 2011-10-26 | 2012-06-13 | 鑫堡辉有限公司 | Automatic door closer structure |
| CN103417020A (en) * | 2013-08-22 | 2013-12-04 | 安吉宏峰气弹簧科技有限公司 | Lifting bar of swivel chair |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2925941B2 (en) * | 1994-08-26 | 1999-07-28 | 新明和工業株式会社 | Fluid cylinder |
| JP3766970B2 (en) * | 2001-12-26 | 2006-04-19 | 日本発条株式会社 | Door closer |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2193911Y (en) * | 1994-06-15 | 1995-04-05 | 常州气弹簧厂 | Controllable door closer |
| CN1912417A (en) * | 2005-08-11 | 2007-02-14 | 共荣工业株式会社 | Liquid damper |
| CN102203369A (en) * | 2008-10-23 | 2011-09-28 | 拉玛德卡尼股份公司 | Damper |
| CN101852050A (en) * | 2009-03-30 | 2010-10-06 | 稳多企业股份有限公司 | Slow and smooth automatic door closing device |
| CN202273526U (en) * | 2011-10-26 | 2012-06-13 | 鑫堡辉有限公司 | Automatic door closer structure |
| CN103417020A (en) * | 2013-08-22 | 2013-12-04 | 安吉宏峰气弹簧科技有限公司 | Lifting bar of swivel chair |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006009A (en) * | 2017-11-29 | 2018-05-08 | 重庆维庆液压机械有限公司 | A kind of cylinder cushion device |
| CN108006009B (en) * | 2017-11-29 | 2019-06-28 | 重庆维庆液压机械有限公司 | A kind of cylinder cushion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104747534A (en) | 2015-07-01 |
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