CN104747534A - Impact buffering device of hydraulic cylinder - Google Patents
Impact buffering device of hydraulic cylinder Download PDFInfo
- Publication number
- CN104747534A CN104747534A CN201310753041.3A CN201310753041A CN104747534A CN 104747534 A CN104747534 A CN 104747534A CN 201310753041 A CN201310753041 A CN 201310753041A CN 104747534 A CN104747534 A CN 104747534A
- Authority
- CN
- China
- Prior art keywords
- oil
- piston rod
- cylinder body
- outer cylinder
- groove
- 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.)
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Classifications
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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
- F15B15/226—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 oil hydraulic cylinder relief means, particularly a kind of oil hydraulic cylinder relief means slowing down impact phenomenon.
Background technique
Existing cylinder cushion device is mainly and is provided with an outer cylinder body and a piston rod, wherein this outer cylinder body is a hollow tube and in internal reservoir one hydraulic oil, and one end of this piston rod is be located at slidably in this outer cylinder body and be provided with a piston, the external diameter of this piston is less than the internal diameter of this outer cylinder body, are flowed in the both sides of the hydraulic oil in this outer cylinder body respectively at this piston by this piston, when this piston rod moves relative to this outer cylinder body, hydraulic oil can produce flowing via this piston, the effect that hydraulic pressure that this piston produces can provide this piston rod one to cushion is flowed through by hydraulic oil, wherein existing piston is mainly and is arranged with a containing groove in middle section annular, an only oil ring that can recline mutually with this outer cylinder body internal surface is arranged with in this containing groove, this piston separately runs through respectively in the dual-side of this containing groove and is provided with multiple oil guiding hole communicated with this containing groove, the internal diameter size being wherein positioned at the oil guiding hole of these containing groove both sides is not identical, hydraulic oil can be flowed in the oil guiding hole of different inner diameters size, and then allow this piston rod have different speed when different motion direction, to reach the function of a buffering,
But, existing cylinder cushion device can be installed on a track, and then by effect that this piston rod provides door-plate one to cushion, but be only applicable to when this piston rod is subject to less external force, the hydraulic oil being positioned at this outer cylinder body can flow swimmingly between the oil guiding hole of different inner diameters size, but when piston rod is subject to larger external force, when hydraulic oil cannot flow to the oil guiding hole of large diameter by the oil guiding hole of little internal diameter within the short time, the travelling speed of this piston rod and door-plate speed is made to cause excessive drop because hydraulic oil cannot flow swimmingly, and then because the speed of door-plate declines rapidly and causes the phenomenon of door-plate sharp pounding, that is when this piston rod is subject to larger external force, then existing cylinder cushion device cannot provide the effect that this piston rod one cushions effectively, therefore, improvements are in addition had for the technology of existing cylinder cushion device.
Summary of the invention
For solving existing cylinder cushion device when bearing larger external force, hydraulic oil cannot flow swimmingly and make the speed of this piston rod and door-plate produce excessive drop, defect and the deficiency of this door-plate one cushioning effect cannot be provided via this piston rod effectively, object of the present invention is for providing a kind of oil hydraulic cylinder relief means, it can work as this oil hydraulic cylinder relief means when bearing larger external force, hydraulic oil can swimmingly via other channel flow to the opposite side of piston, and when external force reduces, automatically close this passage, effectively avoid when piston rod speed and door-plate velocity head excessive time, this door-plate can produce the phenomenon of vibrations, effectively to provide the object of this door-plate one cushioning effect.
Based on aforementioned object, the technological scheme that the present invention uses is to provide a kind of oil hydraulic cylinder relief means, and it is provided with an outer cylinder body and a piston rod, wherein: described outer cylinder body is the body of a hollow and is provided with a perforate in one end, one end of described piston rod is stretched in this outer cylinder body and in this end through this perforate and is provided with a piston, this piston is provided with a connecting part and a flow portion, this connecting part combines with this piston rod and is provided with an engagement groove, one ball groove, multiple sides relief hole, one pressure release ball and an elastic element, this engagement groove is axially recessed to combine with this piston rod in this connecting part, this ball fluted shaft is to the recessed the other end in this connecting part and communicate with this engagement groove, relief hole radial and interval in each side is located at the outer surface of this connecting part and is communicated with this ball groove, this pressure release ball to be located in this ball groove and between the relief hole of each side, this elastic element to be located in this ball groove and to be leant with this pressure release ball and this piston rod, make this pressure release ball relative with each side relief hole, and described flow portion is formed at this connecting part and is provided with one end of ball groove and external diameter is greater than the external diameter of this connecting part, this flow portion is provided with a containing groove, one stops oil ring, one central channel, multiple first oil guiding hole and multiple second oil guiding hole, this containing groove annular is recessed in the outer surface of this flow portion middle section, this flow portion is made to form one first flange and one second flange respectively in the both sides of this containing groove, this first flange is near each side relief hole of this connecting part, should only be sheathed in this containing groove and to recline mutually with the internal surface of this outer cylinder body by oil ring, and can recline mutually with this first flange or this second flange, this central channel axially runs through this flow portion and can communicate with each side relief hole through the movement of this pressure release ball, the wherein pushing and pressing of this this elastic element of pressure release ball warp, the path between this central channel and each side relief hole can be closed, and this pressure release ball is relative with each side relief hole, can directly be flowed out by each side relief hole when hydraulic oil goes out from center concentrated flow and touches pressure release ball, can not allow hydraulic oil in ball groove, first flow through pressure release ball surface flowed out by each side relief hole again, use and avoid producing noise because of pressure release ball fast vibration, radial and the compartment of terrain of each first oil guiding hole is run through this first flange and communicates with this containing groove, and the radial and compartment of terrain of each second oil guiding hole is run through this second flange and is communicated with this containing groove, wherein each second oil guiding hole has different internal diameters from each first oil guiding hole.
Further, the internal diameter of described each second oil guiding hole is greater than the internal diameter of each first oil guiding hole.
Further again, described outer cylinder body is being provided with an oil sealing near this tapping, and one end of this piston rod is stretched in this outer cylinder body through the perforate of this outer cylinder body and oil sealing.
Preferably, described outer cylinder body is provided with a joint head in the other end.
Preferably, the outer surface that described piston rod stretches into outer cylinder body one end is provided with an outside thread, and the engagement groove of this connecting part is provided with an internal thread be screwed with this piston rod outside thread in internal surface.
Preferably, described pressure release ball is positioned at this ball groove and resists this central channel, and with the passage between blocked center groove and each side relief hole, this elastic element is between this pressure release ball and this piston rod.
By above-mentioned technological scheme, beneficial effect and advantage effect of oil hydraulic cylinder relief means of the present invention are:
1, hydraulic oil smooth outflow: oil hydraulic cylinder relief means of the present invention by arranging oil guiding hole, containing groove, central channel, pressure release ball, the isostructural mode of side relief hole on this piston, piston rod can be flowed via oil guiding hole and containing groove being subject to less external force, and can flow via oil guiding hole, containing groove, central channel and side relief hole when larger external force simultaneously, the hydraulic oil in outer cylinder body is allowed to flow swimmingly, to provide the cushioning effect needed for door-plate.
2, slow down impact phenomenon: when this piston rod be subject to larger external force and towards this outer cylinder body relative movement time, be positioned at the hydraulic oil of this side, plug-flow portion except can flow to the side of this piston combining part via each second oil guiding hole, this containing groove and each first oil guiding hole, also the side, connecting part of this piston can be flowed to via this central channel and each side relief hole, and can not as existing cylinder cushion device because hydraulic oil cannot flow swimmingly, and make the velocity head of this piston rod and door-plate excessive, and then door-plate is allowed to produce the phenomenon of sharp pounding.
Accompanying drawing explanation
Fig. 1 is stereoscopic schematic diagram of the present invention.
Fig. 2 is cross sectional side view of the present invention.
Fig. 3 is enlarged local section side view of the present invention.
Fig. 4 is the flow of fluid side view of inventive piston bar relative outer cylinder body when pulling.
Fig. 5 is that inventive piston bar extrudes flow of fluid side view when phase moves outer cylinder body by less external force.
Fig. 6 is that inventive piston bar extrudes flow of fluid side view when phase moves outer cylinder body by larger external force.
Critical piece symbol description:
10 outer cylinder body 11 joint heads
12 perforate 13 oil sealings
20 piston rod 21 outside threads
30 piston 31 connecting parts
311 engagement groove 312 ball grooves
313 side relief hole 314 pressure release balls
315 elastic element 316 internal threads
32 flow portion 321 containing grooves
322 stop oil ring 323 central channel
324 first oil guiding hole 325 second oil guiding holes
326 first flange 327 second flanges.
Embodiment
With the following drawings and preferred embodiments of the present invention, the technological means that the present invention takes for reaching predetermined goal of the invention is set forth further.
For technical characteristics of the present invention and practical effect can be understood in detail, and can implement according to the content of specification, at this further with preferred embodiment as shown in drawings, be described in detail as follows, please refer to the embodiment of oil hydraulic cylinder relief means of the present invention as shown in Figure 1 to Figure 3, this oil hydraulic cylinder relief means is provided with outer cylinder body 10 and a piston rod 20, wherein:
This outer cylinder body 10 is the body of a hollow, and one end of this outer cylinder body 10 is provided with a joint head 11, and the other end of this outer cylinder body 10 is provided with a perforate 12, and further, this outer cylinder body 10 is being provided with an oil sealing 13 near this perforate 12 place;
And one end of this piston rod 20 is stretched in this outer cylinder body 10 and in this end through this perforate 12 and oil sealing 13 and is provided with a piston 30, preferably, the outer surface that this piston rod 20 stretches into outer cylinder body 10 one end is provided with an outside thread 21, this piston 30 is provided with connecting part 31 and a flow portion 32, this connecting part 31 combines with this piston rod 20 and is provided with an engagement groove 311, one ball groove 312, multiple sides relief hole 313, one pressure release ball 314 and an elastic element 315, wherein this engagement groove 311 is axially recessed combines with this piston rod 20 in this connecting part 31, further, this engagement groove 311 is provided with an internal thread 316 be screwed with this piston rod 20 outside thread 21 in internal surface, and this ball groove 312 axially recessed the other end in this connecting part 31 and communicating with this engagement groove 311, relief hole 313 radial and interval in each side is located at the outer surface of this connecting part 31 and is communicated with this ball groove 312, this pressure release ball 314 to be located in this ball groove 312 and between each side relief hole 313, this elastic element 315 to be located in this ball groove 312 and to be leant with this pressure release ball 314 and this piston rod 20, make this pressure release ball 314 relative with each side relief hole 313.
This flow portion 32 is formed at this connecting part 31 and is provided with one end of ball groove 312 and external diameter is greater than the external diameter of this connecting part 31, this flow portion 32 is provided with a containing groove 321, one stops oil ring 322, one central channel 323, multiple first oil guiding hole 324 and multiple second oil guiding hole 325, wherein this containing groove 321 annular is recessed in the outer surface of this flow portion 32 middle section, this flow portion 32 is made to form one first flange 326 and one second flange 327 respectively in the both sides of this containing groove 321, wherein this first flange 326 is near each side relief hole 313 of this connecting part 31, should only oil ring 322 be sheathed on this flow portion 32 containing groove 321 in and recline mutually with the internal surface of this outer cylinder body 10, and can recline mutually with this first flange 326 or this second flange 327, can flow in these piston 30 two ends to allow the hydraulic oil be stored in this outer cylinder body 10, this central channel 323 axially runs through this flow portion 32 and with this flow portion 32 for concentric is arranged, this central channel 323 can be communicated with each side relief hole 313 through the movement of this pressure release ball 314, wherein this pressure release ball 314 is through the pushing and pressing of this elastic element 315, the path between this central channel 323 and each side relief hole 313 can be closed, radial and the compartment of terrain of each first oil guiding hole 324 is run through this first flange 326 and communicates with this containing groove 321, and the radial and compartment of terrain of each second oil guiding hole 325 is run through this second flange 327 and is communicated with this containing groove 321, wherein the internal diameter of each second oil guiding hole 325 is greater than the internal diameter of each first oil guiding hole 324, further, two flanges 326 as shown in Figure 3, 327 have a gap respectively and between this outer cylinder body 10 internal surface, in addition, allow the structural relation that this pressure release ball 314 is relative with each side relief hole 313, can directly be gone out by each side relief hole stream 313 when hydraulic oil flows out from central channel 323 and touches pressure release ball 314, can not allow hydraulic oil in ball groove 312, first flow through pressure release ball 314 surface flowed out by each side relief hole 313 again, to avoid producing noise because of pressure release ball 314 fast vibration.
Oil hydraulic cylinder relief means of the present invention in use, please refer to as shown in Figure 4, wherein when piston rod 20 this outer cylinder body 10 relative pulls out outwardly, this piston 30 can along with piston rod 20 relatively this outer cylinder body 10 slide, and the only oil ring 322 being arranged in this containing groove 321 is because reclining mutually with this outer cylinder body 10 internal surface, can lean with the second flange 327 of this flow portion 32, make the hydraulic oil being positioned at this side, piston 30 connecting part 31 via each first oil guiding hole 324, gap between this first flange 326 and this outer cylinder body 10 internal surface, this containing groove 321 and each second oil guiding hole 325 and flow to the side of this piston 30 flow portion 32, wherein because the internal diameter of each second oil guiding hole 325 is greater than the internal diameter of each first oil guiding hole 324, when allowing this piston rod 20 this outer cylinder body 10 relative pull out outwardly, hydraulic oil can flow to this flow portion 32 side by the side, connecting part 31 of this piston 30 rapidly.
Please refer to as shown in Figure 5, when this piston rod 20 is subject to less external force and moves towards this outer cylinder body 10 inside, this piston 30 can along with piston rod 20 relatively this outer cylinder body 10 slide, now, be arranged in the only oil ring 322 of this containing groove 321 because reclining mutually with this outer cylinder body 10 internal surface, can lean with the first flange 326 of this flow portion 32, make the hydraulic oil being positioned at this piston 30 flow portion 32 side via each second oil guiding hole 325, gap between this second flange 327 and this outer cylinder body 10 internal surface, this containing groove 321 and each first oil guiding hole 324 and flow to the side of this piston 30 connecting part 31, allow relative this outer cylinder body 10 retraction inwardly of this piston rod 20 time, hydraulic oil slower speeds can flow to this side, connecting part 31 by flow portion 32 side of this piston 30, wherein because hydraulic oil is each first oil guiding hole 324 being flowed to little internal diameter by each second oil guiding hole 325 of large diameter, therefore, this hydraulic oil can produce a hydraulic pressure and provide the effect that this piston rod 20 1 cushions.
In addition, when this piston rod 20 is subject to larger external force as shown in Figure 6 and moves towards this outer cylinder body 10 inside, this piston 30 can along with piston rod 20 relatively this outer cylinder body 10 slide, now, be arranged in the only oil ring 322 of this containing groove 321 because reclining mutually with this outer cylinder body 10 internal surface, can lean with the first flange 326 of this flow portion 32, the hydraulic oil making to be positioned at this piston 30 flow portion 32 side is except can via each second oil guiding hole 325, this containing groove 321 and each first oil guiding hole 324 and flow to the side of this piston 30 connecting part 31, allow relative this outer cylinder body 10 retraction inwardly of this piston rod 20 time, hydraulic oil can flow to this side, connecting part 31 by flow portion 32 side of this piston 30, wherein because external force crosses ambassador originally via each second oil guiding hole 325, gap between this second flange 327 and this outer cylinder body 10 internal surface, the hydraulic oil that containing groove 321 and each first oil guiding hole 324 flow through, be not enough to the pressure cutting out external force, and unnecessary pressure can make hydraulic oil promote this pressure release ball 314 via this central channel 323 moves towards this piston rod 20 direction and compress this elastic element 315, this central channel 323 is allowed to communicate with each side relief hole 313, now, be positioned at this flow portion 32 side hydraulic oil also can flow to this piston 30 side, connecting part 31 via this central channel 323 and each side relief hole 313, thus, the hydraulic oil being positioned at this piston 30 flow portion 32 side not only can by each second oil guiding hole 325, containing groove 321 and each first oil guiding hole 324 flow to the side, connecting part 31 of this piston 30, also the side, connecting part 31 of this piston 30 can be flowed to via this central channel 323 and each side relief hole 313, when pressure is cut down extremely to a certain degree, the elastic element 315 of this compression can promote this pressure release ball 314 and return to initial position, automatically to close the path between this central channel 323 and each side relief hole 313, therefore, when piston rod 20 of the present invention is subject to larger external force, hydraulic oil not only still can flow swimmingly in this outer cylinder body 10, the effect simultaneously providing door-plate one to cushion via this piston rod 20, and can not as existing cylinder cushion device because hydraulic oil cannot flow swimmingly, make this piston rod 20 excessive with the velocity head of door-plate, door-plate is caused to produce the phenomenon of sharp pounding.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. an oil hydraulic cylinder relief means, is characterized in that, described device is provided with an outer cylinder body and a piston rod, wherein:
Described outer cylinder body is the body of a hollow and is provided with a perforate in one end;
One end of described piston rod is stretched in this outer cylinder body and in this end through this perforate and is provided with a piston, this piston is provided with a connecting part and a flow portion, this connecting part combines with this piston rod and is provided with an engagement groove, one ball groove, multiple sides relief hole, one pressure release ball and an elastic element, this engagement groove is axially recessed to combine with this piston rod in this connecting part, this ball fluted shaft is to the recessed the other end in this connecting part and communicate with this engagement groove, relief hole radial and interval in each side is located at the outer surface of this connecting part and is communicated with this ball groove, this pressure release ball to be located in this ball groove and between the relief hole of each side, this elastic element to be located in this ball groove and to be leant with this pressure release ball and this piston rod, make this pressure release ball relative with each side relief hole, and
Described flow portion is formed at this connecting part and is provided with one end of ball groove and external diameter is greater than the external diameter of this connecting part, this flow portion is provided with a containing groove, one stops oil ring, one central channel, multiple first oil guiding hole and multiple second oil guiding hole, this containing groove annular is recessed in the outer surface of this flow portion middle section, this flow portion is made to form one first flange and one second flange respectively in the both sides of this containing groove, this first flange is near each side relief hole of this connecting part, should only be sheathed in this containing groove and to recline mutually with the internal surface of this outer cylinder body by oil ring, and can recline mutually with this first flange or this second flange, this central channel axially runs through this flow portion and can communicate with each side relief hole through the movement of this pressure release ball, the wherein pushing and pressing of this this elastic element of pressure release ball warp, the path between this central channel and each side relief hole can be closed, radial and the compartment of terrain of each first oil guiding hole is run through this first flange and communicates with this containing groove, and the radial and compartment of terrain of each second oil guiding hole is run through this second flange and is communicated with this containing groove, wherein each second oil guiding hole has different internal diameters from each first oil guiding hole.
2. oil hydraulic cylinder relief means according to claim 1, is characterized in that, the internal diameter of described each second oil guiding hole is greater than the internal diameter of each first oil guiding hole.
3. oil hydraulic cylinder relief means according to claim 2, is characterized in that, described outer cylinder body is being provided with an oil sealing near this tapping, and one end of this piston rod is stretched in this outer cylinder body through the perforate of this outer cylinder body and oil sealing.
4. oil hydraulic cylinder relief means according to claim 3, is characterized in that, described outer cylinder body is provided with a joint head in the other end.
5. oil hydraulic cylinder relief means according to claim 4, it is characterized in that, the outer surface that described piston rod stretches into outer cylinder body one end is provided with an outside thread, and the engagement groove of this connecting part is provided with an internal thread be screwed with this piston rod outside thread in internal surface.
6. oil hydraulic cylinder relief means according to claim 5, it is characterized in that, described pressure release ball is positioned at this ball groove and resists this central channel, and with the passage between blocked center groove and each side relief hole, this elastic element is between this pressure release ball and this piston rod.
7. oil hydraulic cylinder relief means according to claim 1, is characterized in that, described outer cylinder body is being provided with an oil sealing near this tapping, and one end of this piston rod is stretched in this outer cylinder body through the perforate of this outer cylinder body and oil sealing.
8. oil hydraulic cylinder relief means according to claim 1 and 2, is characterized in that, described outer cylinder body is provided with a joint head in the other end.
9. the oil hydraulic cylinder relief means according to claim 1,2 or 3, it is characterized in that, the outer surface that described piston rod stretches into outer cylinder body one end is provided with an outside thread, and the engagement groove of this connecting part is provided with an internal thread be screwed with this piston rod outside thread in internal surface.
10. according to the oil hydraulic cylinder relief means of Claims 1-4 according to any one of it, it is characterized in that, described pressure release ball is positioned at this ball groove and resists this central channel, and with the passage between blocked center groove and each side relief hole, this elastic element is between this pressure release ball and this 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 true CN104747534A (en) | 2015-07-01 |
| CN104747534B CN104747534B (en) | 2017-04-12 |
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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 |
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| CN (1) | CN104747534B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108368859A (en) * | 2015-12-23 | 2018-08-03 | Abb瑞士股份有限公司 | Memory module for hydromechanical spring-type drive |
| CN110848309A (en) * | 2019-11-19 | 2020-02-28 | 李茂强 | Pressure-controllable oil buffer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN2193911Y (en) * | 1994-06-15 | 1995-04-05 | 常州气弹簧厂 | Controllable door closer |
| JPH0861309A (en) * | 1994-08-26 | 1996-03-08 | Shin Meiwa Ind Co Ltd | Fluid cylinder |
| JP2003193740A (en) * | 2001-12-26 | 2003-07-09 | Nhk Spring Co Ltd | Door closer |
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| 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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|---|---|---|---|---|
| CN2193911Y (en) * | 1994-06-15 | 1995-04-05 | 常州气弹簧厂 | Controllable door closer |
| JPH0861309A (en) * | 1994-08-26 | 1996-03-08 | Shin Meiwa Ind Co Ltd | Fluid cylinder |
| JP2003193740A (en) * | 2001-12-26 | 2003-07-09 | Nhk Spring Co Ltd | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108368859A (en) * | 2015-12-23 | 2018-08-03 | Abb瑞士股份有限公司 | Memory module for hydromechanical spring-type drive |
| US11286959B2 (en) | 2015-12-23 | 2022-03-29 | Hitachi Energy Switzerland Ag | Accumulator module for hydromechanical 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104747534B (en) | 2017-04-12 |
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