CN103256274A - Anti-impact hydraulic oil cylinder - Google Patents
Anti-impact hydraulic oil cylinder Download PDFInfo
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- CN103256274A CN103256274A CN2013102086642A CN201310208664A CN103256274A CN 103256274 A CN103256274 A CN 103256274A CN 2013102086642 A CN2013102086642 A CN 2013102086642A CN 201310208664 A CN201310208664 A CN 201310208664A CN 103256274 A CN103256274 A CN 103256274A
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- piston
- hydraulic jack
- protecting against
- against shock
- rodless cavity
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Abstract
The invention discloses an anti-impact hydraulic oil cylinder. The anti-impact hydraulic oil cylinder comprises a cylinder body, a piston which is arranged in the cylinder body and a piston rod, wherein one end of the piston rod is fixedly connected with the piston. A bottom cover is arranged at the bottom of the cylinder body, a non-rod chamber is formed between the bottom cover and the piston, an oil inlet is communicated inside the non-rod chamber, an oil return hole is further connected inside the non-rod chamber, and a sealing device is arranged on the piston, wherein the sealing device is used for sealing the oil return hole when the sealing device is located at the bottom of the non-rod chamber. In the process of descending of the anti-impact hydraulic oil cylinder loading objects with large weight, gravity descending is adopted, and meanwhile the non-rod chamber of the hydraulic oil cylinder is always in a backpressure oil supplying state, and therefore impact force of the hydraulic oil cylinder in the process of moving downwards can be buffered.
Description
Technical field
The present invention relates to a kind of hydraulic jack, specifically relate to a kind of protecting against shock formula hydraulic jack.
Background technique
Hydraulic transmission utilizes the kinetic energy of liquid to transmit energy, is widely used in each side such as machine-building, engineering construction, petrochemical industry, communications and transportation, military machine, mine metallurgy, light industry, agricultural machinery, fishery, forestry.Simultaneously, also be applied to each field of engineering technology such as space flight and aviation, ocean development, nuclear energy engineering and earthquake prediction, wherein hydraulic jack is as necessary part in the hydraulic transmission, existing oil cylinder conventional structure is: comprise cylinder body, piston and piston rod, wherein piston and piston rod are divided into rod chamber and rodless cavity two-part with cylinder interior, cylinder body is provided with oil inlet hole and the spill port that leads to rod chamber and rodless cavity respectively, and oil inlet hole and spill port are tightly connected by pipe joint and fuel supply line.During work, the rodless cavity oil-feed, piston rod stretches out, and oil is discharged by oil pipe in the rod chamber; The rod chamber oil-feed, piston rod shrinks, and oil is discharged by oil pipe in the rodless cavity.The characteristics of this oil cylinder are: when the object of the big quality of piston rod drive moves downward, possessed very big kinetic energy, when putting in place Deng the piston rod contraction, can produce very big impact force, the parts of cylinder part or support cylinder are sustained damage, for example in steel rolling mill, when fortune volume dolly hydraulic jack need be gone up volume or unload volume, heavy burden coil of strip weight reaches about 25 tons, descend when putting in place rolling up or unload volume hydraulic jack holder volume, impact force to fortune volume dolly is bigger, damages fortune volume dolly travelling wheel easily, simultaneously the sebific duct of giving the hydraulic jack fuel feeding is brought impact, make sebific duct serious wear or explosion, not only cause big gauging to leak, waste oil product resource, and other might appear as the coil of strip equipment accident of collapsing.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of protecting against shock formula hydraulic jack, this hydraulic jack is in heavy burden greater weight object decline process, employing gravity descends, the hydraulic jack rodless cavity adopts back pressure fuel feeding state always simultaneously, and the impact force when hydraulic jack is moved downward obtains buffering.
For achieving the above object, protecting against shock formula hydraulic jack of the present invention comprises cylinder body, be arranged on the piston rod that cylinder body inner carrier and an end are fixedlyed connected with piston, described cylinder base is provided with bottom, form rodless cavity between described bottom and the piston, be communicated with oil inlet hole in the described rodless cavity, also be connected with spill port in the described rodless cavity, described piston is provided with for it and is positioned at the seal arrangement that the rodless cavity bottom time seals this spill port.
Further, described spill port is arranged on the cylinder base inwall, and described seal arrangement is set to piston side wall.
Further, described cylinder base inwall is provided with conical surface, and described spill port is arranged on the conical surface.
Further, stretch into cylinder body one end end face on the described bottom and be set to conical surface, described spill port is arranged on the conical surface and is shaped as arc.
Further, described seal arrangement is set to be installed on the piston and the cushion adaptive with conical surface.
Further, described oil inlet hole is connected with oil inlet pipe, and described spill port is connected with return tube, the normally closed solenoid directional control valve of closing when described return tube is provided with and stretches out for piston rod.
Further, described piston is identical with the diameter of piston rod.
Further, a corresponding side with rodless cavity is set to rod chamber in the described cylinder body, and described rod chamber is provided with suction port, and described suction port place arranges silencing apparatus and air filter.
Further, a corresponding side with rodless cavity is set to rod chamber in the described cylinder body, and described rod chamber is provided with the filler opening I.
Further, described normally closed solenoid directional control valve is set to the bi-bit bi-pass solenoid directional control valve.
Beneficial effect of the present invention is:
Protecting against shock formula hydraulic jack of the present invention adopts gravity to descend in heavy burden greater weight object decline process, and the hydraulic jack rodless cavity adopts back pressure fuel feeding state always simultaneously, and the impact force when hydraulic jack is moved downward obtains buffering.
Its working procedure of protecting against shock formula hydraulic jack of the present invention is as follows:
When hydraulic jack rises, give the rodless cavity fuel feeding by oil inlet hole, rodless cavity pressure rises, and promotes piston and rises, and exposes spill port, and piston rod is stretched out, and the normally closed solenoid directional control valve that be communicated with spill port this moment is not worked not oil return of spill port;
Hydraulic jack bears a heavy burden when descending, and oil inlet hole continues to the rodless cavity fuel feeding, opens the normally closed solenoid directional control valve that is communicated with spill port this moment, spill port begins oil return, rodless cavity pressure descends, and piston rod shrinks, and piston falls, when piston falls to spill port and begins to seal spill port, rodless cavity pressure descends, and piston rod shrinks slack-off, until whole sealing spill ports, piston rod stops to shrink, and the impact force when hydraulic jack is moved downward obtains buffering.
Description of drawings
Fig. 1 is the sectional view of first kind of mode of execution of protecting against shock formula hydraulic jack of the present invention;
Fig. 2 is the sectional view of protecting against shock formula hydraulic jack propradation of the present invention;
Fig. 3 is A-A direction sectional view among Fig. 2;
Fig. 4 is the sectional view of second kind of mode of execution of protecting against shock formula hydraulic jack of the present invention;
Fig. 5 is the sectional view of the third mode of execution of protecting against shock formula hydraulic jack of the present invention.
Reference character: 1-cylinder body; The 2-piston; The 3-piston rod; The 4-bottom; The 5-rodless cavity; The 6-oil inlet hole; The 7-spill port; The 8-cushion; The 9-conical surface.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Be illustrated in figure 1 as the sectional view of first kind of mode of execution of protecting against shock formula hydraulic jack of the present invention; Be illustrated in figure 2 as the sectional view of protecting against shock formula hydraulic jack propradation of the present invention; Be illustrated in figure 3 as A-A direction sectional view among Fig. 2; Protecting against shock formula hydraulic jack of the present invention comprises cylinder body 1, be arranged on the piston rod 3 that cylinder body 1 inner carrier 2 and an end are fixedlyed connected with piston 2, described cylinder body 1 bottom is provided with bottom 4, form rodless cavity 5 between described bottom 4 and the piston 2, be communicated with oil inlet hole 6 in the described rodless cavity 5, also be connected with spill port 7 in the described rodless cavity, described piston 2 seals the seal arrangement of this spill port 7 when being provided with and being positioned at rodless cavity 5 bottoms for it.
The present embodiment hydraulic jack adopts gravity to descend in heavy burden greater weight object decline process, and the hydraulic jack rodless cavity adopts back pressure fuel feeding state always simultaneously, and the impact force when hydraulic jack is moved downward obtains buffering.
Its working procedure of protecting against shock formula hydraulic jack of the present invention is as follows:
When hydraulic jack rises, give rodless cavity 5 fuel feeding by oil inlet hole 6, rodless cavity 5 pressure rise, and promote piston 2 and rise, and expose spill port 7, and piston rod 3 is stretched out, and the normally closed solenoid directional control valve that be communicated with spill port 7 this moment is not worked spill port 7 not oil returns;
Hydraulic jack bears a heavy burden when descending, and oil inlet hole 6 continues to give the rodless cavity fuel feeding, opens the normally closed solenoid directional control valve that is communicated with spill port 7 this moment, spill port 7 beginning oil returns, rodless cavity 5 pressure descend, and piston rod 3 begins to shrink, and piston 2 falls, when piston 2 falls to spill port 7 and seal arrangement begins to seal spill port 7, rodless cavity 5 pressure rise, and piston rod 3 shrinks slack-off, until whole sealing spill ports 7, piston rod 3 stops to shrink, and the impact force when hydraulic jack is moved downward obtains buffering.
Further, stretch into cylinder body 1 one end end faces on the preferred described bottom 4 and be set to conical surface 9, described spill port 7 is arranged on the conical surface 9 and is shaped as arc, spill port 7 shapes can be chosen as circular hole or other structures in the present embodiment, preferred spill port 7 is arranged on arc and all goes on foot at conical surface 9, this structure is conducive to rapid oil return, reduce the rodless cavity oil pressure, pressure surge is little, eliminate entrap phenomenon and since the instantaneous flow that pressure jump causes pulse and noise, preferred described seal arrangement is set to be installed on the piston 1 and the cushion 8 adaptive with conical surface 9, cushion 8 can adopt rubber material to make, and this structure is conducive to buffering is played in piston 1 decline when putting in place effect.
Further, preferred described oil inlet hole 6 is connected with oil inlet pipe, described spill port is connected with return tube, the normally closed solenoid directional control valve of closing when described return tube is provided with and stretches out for piston rod, preferred described normally closed solenoid directional control valve is set to the bi-bit bi-pass solenoid directional control valve, and this structure control is simple, cost is low.
Further, a corresponding side with rodless cavity is set to rod chamber in the described cylinder body, and described rod chamber is provided with the filler opening I.
Embodiment two
Be illustrated in figure 4 as the sectional view of second kind of mode of execution of protecting against shock formula hydraulic jack of the present invention; Present embodiment is with the difference that embodiment one compares: further, described cylinder base inwall is provided with conical surface, and described spill port is arranged on the conical surface, this structure is compared with embodiment one, described spill port quantity is few, processes simply relatively, and processing cost is low.
Other structures of present embodiment are identical with first embodiment, no longer one by one tired stating.
Embodiment three
Be illustrated in figure 5 as the sectional view of the third mode of execution of protecting against shock formula hydraulic jack of the present invention; Present embodiment is with the difference that embodiment two compares: described spill port is arranged on the cylinder base inwall, described seal arrangement is set to piston side wall, spill port is set directly on the cylinder base inwall in the present embodiment, and when piston was positioned at the rodless cavity bottom, sidewall just was used for the sealing spill port between pistons end and the oil sealing, this structure does not influence the service behaviour of piston, this structure is compared with embodiment two, processes simplyr, and cost is lower, but pressure surge is big
Embodiment four
Present embodiment is with the difference that embodiment one compares: the diameter of described piston and piston rod is identical, and this structure mainly is for plunger case.
Other structures of present embodiment are identical with first embodiment, no longer one by one tired stating.
Embodiment five
Present embodiment is with the difference that embodiment one compares: be set to rod chamber with the corresponding side of rodless cavity in the described cylinder body, described rod chamber is provided with suction port, and described suction port place arranges silencing apparatus and air filter; This structure is so long as consider that the rod chamber end seals easy senile abrasion under high temperature condition, the generation leakage, hydraulic oil is apt to deteriorate, present embodiment hydraulic jack rod chamber adopts vacant or air inlet state, and the dust ring that the hydraulic jack rod chamber adopts the heat resistant and wear resistant material to make reduces and leaks.
Other structures of present embodiment are identical with first embodiment, no longer one by one tired stating.
Explanation is at last, above preferred embodiment is only unrestricted in order to technological scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from claims of the present invention institute restricted portion.
Claims (10)
1. protecting against shock formula hydraulic jack, comprise cylinder body, be arranged on the piston rod that cylinder body inner carrier and an end are fixedlyed connected with piston, described cylinder base is provided with bottom, form rodless cavity between described bottom and the piston, be communicated with oil inlet hole in the described rodless cavity, it is characterized in that: also be connected with spill port in the described rodless cavity, described piston is provided with for it and is positioned at the seal arrangement that the rodless cavity bottom time seals this spill port.
2. protecting against shock formula hydraulic jack as claimed in claim 1, it is characterized in that: described spill port is arranged on the cylinder base inwall, and described seal arrangement is set to piston side wall.
3. protecting against shock formula hydraulic jack as claimed in claim 1, it is characterized in that: described cylinder base inwall is provided with conical surface, and described spill port is arranged on the conical surface.
4. protecting against shock formula hydraulic jack as claimed in claim 1, it is characterized in that: stretch into cylinder body one end end face on the described bottom and be set to conical surface, described spill port is set to arc and is distributed on the conical surface.
5. as claim 3 or 4 described protecting against shock formula hydraulic jacks, it is characterized in that: described seal arrangement is set to be installed on the piston and the cushion adaptive with conical surface.
6. as the described protecting against shock formula of claim 1-4 hydraulic jack, it is characterized in that: described oil inlet hole is connected with oil inlet pipe, and described spill port is connected with return tube, the normally closed solenoid directional control valve of closing when described return tube is provided with and stretches out for piston rod.
7. protecting against shock formula hydraulic jack as claimed in claim 5, it is characterized in that: described piston is identical with the diameter of piston rod.
8. protecting against shock formula hydraulic jack as claimed in claim 5 is characterized in that: a corresponding side with rodless cavity is set to rod chamber in the described cylinder body, and described rod chamber is provided with suction port, and described suction port place arranges silencing apparatus and air filter.
9. protecting against shock formula hydraulic jack as claimed in claim 5 is characterized in that: a corresponding side with rodless cavity is set to rod chamber in the described cylinder body, and described rod chamber is provided with the filler opening I.
10. protecting against shock formula hydraulic jack as claimed in claim 5, it is characterized in that: described normally closed solenoid directional control valve is set to the bi-bit bi-pass solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310208664.2A CN103256274B (en) | 2013-05-30 | 2013-05-30 | Anti-impact hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310208664.2A CN103256274B (en) | 2013-05-30 | 2013-05-30 | Anti-impact hydraulic oil cylinder |
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| CN103256274A true CN103256274A (en) | 2013-08-21 |
| CN103256274B CN103256274B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310208664.2A Active CN103256274B (en) | 2013-05-30 | 2013-05-30 | Anti-impact hydraulic oil cylinder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288950A (en) * | 2017-06-29 | 2017-10-24 | 无锡市京锡冶金液压机电有限公司 | A kind of strong single-acting cylinder of dirt exclusion capabilities |
| CN112879385A (en) * | 2021-01-11 | 2021-06-01 | 南京航空航天大学 | Integrated actuating device based on flexible cavity group and peak-pressure flow-dividing single-piston pump |
| CN117657704A (en) * | 2023-12-29 | 2024-03-08 | 江苏德恒工业智能科技有限公司 | Track vertical switching system for fast transfer path of automobile parts |
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| EP1199480A2 (en) * | 2000-10-16 | 2002-04-24 | Luciano Migliori | Compact pneumatic cylinder, with cushioning device |
| CN201023418Y (en) * | 2006-12-11 | 2008-02-20 | 杨晶菁 | Automatic semi-connection hydraulic device for manual shift automobile |
| CN201437802U (en) * | 2009-07-22 | 2010-04-14 | 宁波优耐特模具有限公司 | Hydraulic cylinder |
| CN102852904A (en) * | 2012-09-11 | 2013-01-02 | 苏州同大机械有限公司 | Buffer oil cylinder for plastic product forming machinery |
| CN202673869U (en) * | 2012-07-13 | 2013-01-16 | *** | Large-scale gate type plate shearing machine hydraulic cylinder with buffer function |
| CN202732535U (en) * | 2012-07-05 | 2013-02-13 | 中山市意利克机械设备有限公司 | Cushion cylinder with buffering speed adjustable |
| CN102943789A (en) * | 2012-11-09 | 2013-02-27 | 昆明中铁大型养路机械集团有限公司 | Adjustable-pressure and adjustable-flow buffer hydraulic cylinder, control method and hydraulic system |
| CN203384154U (en) * | 2013-05-30 | 2014-01-08 | 重庆钢铁(集团)有限责任公司 | Anti-impact hydraulic oil cylinder |
-
2013
- 2013-05-30 CN CN201310208664.2A patent/CN103256274B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1199480A2 (en) * | 2000-10-16 | 2002-04-24 | Luciano Migliori | Compact pneumatic cylinder, with cushioning device |
| CN201023418Y (en) * | 2006-12-11 | 2008-02-20 | 杨晶菁 | Automatic semi-connection hydraulic device for manual shift automobile |
| CN201437802U (en) * | 2009-07-22 | 2010-04-14 | 宁波优耐特模具有限公司 | Hydraulic cylinder |
| CN202732535U (en) * | 2012-07-05 | 2013-02-13 | 中山市意利克机械设备有限公司 | Cushion cylinder with buffering speed adjustable |
| CN202673869U (en) * | 2012-07-13 | 2013-01-16 | *** | Large-scale gate type plate shearing machine hydraulic cylinder with buffer function |
| CN102852904A (en) * | 2012-09-11 | 2013-01-02 | 苏州同大机械有限公司 | Buffer oil cylinder for plastic product forming machinery |
| CN102943789A (en) * | 2012-11-09 | 2013-02-27 | 昆明中铁大型养路机械集团有限公司 | Adjustable-pressure and adjustable-flow buffer hydraulic cylinder, control method and hydraulic system |
| CN203384154U (en) * | 2013-05-30 | 2014-01-08 | 重庆钢铁(集团)有限责任公司 | Anti-impact hydraulic oil cylinder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288950A (en) * | 2017-06-29 | 2017-10-24 | 无锡市京锡冶金液压机电有限公司 | A kind of strong single-acting cylinder of dirt exclusion capabilities |
| CN112879385A (en) * | 2021-01-11 | 2021-06-01 | 南京航空航天大学 | Integrated actuating device based on flexible cavity group and peak-pressure flow-dividing single-piston pump |
| CN117657704A (en) * | 2023-12-29 | 2024-03-08 | 江苏德恒工业智能科技有限公司 | Track vertical switching system for fast transfer path of automobile parts |
| CN117657704B (en) * | 2023-12-29 | 2024-05-24 | 江苏德恒工业智能科技有限公司 | Track vertical switching system for fast transfer path of automobile parts |
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| Publication number | Publication date |
|---|---|
| CN103256274B (en) | 2017-03-08 |
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Effective date of registration: 20190211 Address after: 401220 No. 1, Gangcheng Road, Changshou District, Chongqing Patentee after: Chongqing Iron and Steel Co., Ltd. Address before: 400080 No. 1, Dadan three village, Dadukou District, Chongqing Patentee before: Chongqing Iron & Steel (Group) Co., Ltd. |
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Address after: No.2 Jiangnan Avenue, Jiangnan street, Changshou District, Chongqing 401220 Patentee after: CHONGQING IRON & STEEL Co.,Ltd. Address before: 401220 No. 1, Gangcheng Road, Changshou District, Chongqing Patentee before: CHONGQING IRON & STEEL Co.,Ltd. |