CN103256274B - Anti-impact hydraulic oil cylinder - Google Patents
Anti-impact hydraulic oil cylinder Download PDFInfo
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- CN103256274B CN103256274B CN201310208664.2A CN201310208664A CN103256274B CN 103256274 B CN103256274 B CN 103256274B CN 201310208664 A CN201310208664 A CN 201310208664A CN 103256274 B CN103256274 B CN 103256274B
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- piston
- rodless cavity
- cylinder
- hydraulic oil
- spill port
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Abstract
The invention discloses a kind of anti-impact hydraulic oil cylinder, include cylinder body, it is arranged on the piston rod that cylinder body inner carrier and one end are fixedly connected with the piston, the cylinder base is provided with bottom, rodless cavity is formed between the bottom and piston, fuel feed hole is communicated with the rodless cavity, spill port is also associated with the rodless cavity, be provided with the sealing device for sealing the spill port when rodless cavity bottom is located at for which on the piston, hydraulic jack of the present invention is during the decline of heavy burden greater weight object, declined using gravity, while hydraulic jack rodless cavity has been used up back pressure oil condition, impulsive force when moving downward hydraulic jack is buffered.
Description
Technical field
The present invention relates to a kind of hydraulic jack, is specifically related to a kind of anti-impact hydraulic oil cylinder.
Background technology
Hydraulic drive using liquid kinetic energy transmitting energy, be widely used in machine-building, engineering construction, oil
The each side such as chemical industry, communications and transportation, military machine, mine metallurgy, light industry, agricultural machinery, fishery, forestry.Meanwhile, it is also applied to boat
Each field of engineering technology such as its aviation, ocean development, nuclear energy engineering and earthquake prediction, wherein hydraulic jack is used as hydraulic drive
In a requisite part, existing oil cylinder conventional structure is：Including cylinder body, piston and piston rod, wherein piston and piston
Cylinder interior is divided into rod chamber and rodless cavity two parts by bar, is provided with the oil-feed for leading to rod chamber and rodless cavity respectively on cylinder body
Hole and spill port, fuel feed hole and spill port are tightly connected with fuel feed pump by pipe joint.During work, rodless cavity oil-feed, piston rod
Stretch out, in rod chamber, oil is discharged by oil pipe；Rod chamber oil-feed, piston rod are shunk, and in rodless cavity, oil is discharged by oil pipe.This
The feature of oil cylinder is：When the object that piston rod drives larger quality is moved downward, possess very big kinetic energy, wait piston rod to receive
When being reduced to, very big impulsive force can be produced, so that cylinder part or the part of support cylinder is sustained damage, for example, is rolling
Steel mill, Coil transport trolley hydraulic jack are needed when rolling up or unloading volume, and heavy burden coil of strip weight reaches 25 tons or so, in upper volume or unload volume hydraulic pressure
When the volume decline of oil cylinder support puts in place, the impulsive force to Coil transport trolley is larger, is easily damaged Coil transport trolley and walks wheel, while to giving hydraulic oil
The sebific duct of oil supply cylinder brings impact, makes sebific duct serious wear or explosion, not only causes big gauging to leak, wastes oil product resource,
And be possible to occur other and collapse equipment breakdown as coil of strip.
Content of the invention
In view of this, it is an object of the invention to provide a kind of anti-impact hydraulic oil cylinder, the hydraulic jack is bearing a heavy burden relatively
During heavy weight object declines, declined using gravity, while hydraulic jack rodless cavity has been used up back pressure oil condition, make
Impulsive force when hydraulic jack is moved downward is buffered.
For reaching above-mentioned purpose, anti-impact hydraulic oil cylinder of the present invention includes cylinder body, is arranged on cylinder body inner carrier and one end
The piston rod being fixedly connected with the piston, the cylinder base are provided with bottom, form rodless cavity, institute between the bottom and piston
State in rodless cavity and fuel feed hole is communicated with, in the rodless cavity, spill port is also associated with, be provided with the piston and be located at for which
The sealing device of the spill port is sealed during rodless cavity bottom.
Further, the spill port is arranged on cylinder base inwall, and the sealing device is set to piston side wall.
Further, taper surface is provided with the cylinder base inwall, the spill port is arranged on taper surface.
Further, cylinder body one end end face being stretched on the bottom and being set to taper surface, the spill port is arranged on taper surface
Go up and be shaped as arc.
Further, the sealing device is set to the cushion being adapted on piston and with taper surface.
Further, the fuel feed hole is connected with oil inlet pipe, and the spill port is connected with oil return pipe, arranges on the oil return pipe
There is the normally closed solenoid directional control valve that closes when stretching out for piston rod.
Further, the piston is identical with the diameter of piston rod.
Further, in the cylinder body, side corresponding with rodless cavity is provided with rod cavity, and the rod chamber is provided with air inlet
Mouthful, silencer and air cleaner are set at the air inlet.
Further, in the cylinder body, side corresponding with rodless cavity is provided with rod cavity, and the rod chamber is provided with oil-feed
Mouth I.
Further, the normally closed solenoid directional control valve is set to two-position two-way electromagnetic directional valve.
The beneficial effects of the present invention is：
Anti-impact hydraulic oil cylinder of the present invention is declined using gravity during the decline of heavy burden greater weight object, with
When hydraulic jack rodless cavity have been used up back pressure oil condition, impulsive force when moving downward hydraulic jack is buffered.
Its course of work of anti-impact hydraulic oil cylinder of the present invention is as follows：
When hydraulic jack rises, by fuel feed hole to rodless cavity fuel feeding, rodless cavity pressure rises, and promotes piston to rise, dew
Go out spill port, while stretching out piston rod, the normally closed solenoid directional control valve for now being connected with spill port is not worked, and spill port is not returned
Oil；
Hydraulic jack is born a heavy burden when declining, and fuel feed hole continues to rodless cavity fuel feeding, now opens connect with spill port normally closed
Solenoid directional control valve, spill port start oil return, and rodless cavity pressure drop, piston rod are shunk, and piston falls, and drops down onto oil return under piston
Hole simultaneously starts to seal spill port, and rodless cavity pressure drop, piston rod contraction are slack-off, until all sealing spill ports, piston rod stops
Only shrink, impulsive force when moving downward hydraulic jack is buffered.
Description of the drawings
Fig. 1 is the sectional view of the first embodiment of anti-impact hydraulic oil cylinder of the present invention；
Fig. 2 is the sectional view of anti-impact hydraulic oil cylinder propradation of the present invention；
Fig. 3 is A-A direction sectional view in Fig. 2；
Fig. 4 is the sectional view of second embodiment of anti-impact hydraulic oil cylinder of the present invention；
Fig. 5 is the sectional view of the third embodiment of anti-impact hydraulic oil cylinder of the present invention.
Reference：1- cylinder body；2- piston；3- piston rod；4- bottom；5- rodless cavity；6- fuel feed hole；7- spill port；8-
Cushion；9- taper surface.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
It is illustrated in figure 1 the sectional view of the first embodiment of anti-impact hydraulic oil cylinder of the present invention；It is illustrated in figure 2 this
The sectional view of invention anti-impact hydraulic oil cylinder propradation；It is illustrated in figure 3 A-A direction sectional view in Fig. 2；The present invention prevents
Impact type hydraulic jack includes cylinder body 1, is arranged on the piston rod 3 that 1 inner carrier 2 of cylinder body is fixedly connected with piston 2 with one end, described
1 bottom of cylinder body is provided with bottom 4, forms rodless cavity 5, be communicated with oil-feed in the rodless cavity 5 between the bottom 4 and piston 2
Hole 6, is also associated with spill port 7 in the rodless cavity, be provided with when being located at 5 bottom of rodless cavity for which and seal on the piston 2
The sealing device of the spill port 7.
The present embodiment hydraulic jack is declined using gravity, while hydraulic pressure during the decline of heavy burden greater weight object
Oil cylinder rodless cavity has been used up back pressure oil condition, and impulsive force when moving downward hydraulic jack is buffered.
Its course of work of anti-impact hydraulic oil cylinder of the present invention is as follows：
When hydraulic jack rises, 5 fuel feeding of rodless cavity is given by fuel feed hole 6,5 pressure of rodless cavity rises, promote on piston 2
Rise, expose spill port 7, while stretching out piston rod 3, the normally closed solenoid directional control valve for now being connected with spill port 7 is not worked, return
7 not oil return of oilhole；
Hydraulic jack is born a heavy burden when declining, and fuel feed hole 6 continues to rodless cavity fuel feeding, now opens normal with what spill port 7 was connected
Solenoid directional control valve is closed, spill port 7 starts oil return, 5 pressure drop of rodless cavity, piston rod 3 are started to shrink at, and piston 2 falls, and works as piston
Drop down onto spill port 7 under 2 and sealing device start to seal spill port 7,5 pressure of rodless cavity rises, piston rod 3 shrink slack-off, until
Spill port 7 is all sealed, and piston rod 3 stops shrinking, and impulsive force when moving downward hydraulic jack is buffered.
Further, 1 one end end face of cylinder body being stretched on preferably described bottom 4 and being set to taper surface 9, the spill port 7 sets
Arc is put on taper surface 9 and is shaped as, 7 shape of spill port can be chosen as circular hole or other structures in the present embodiment, excellent
The spill port 7 of choosing is arranged on arc and all walks in taper surface 9, and the structure is conducive to rapid oil return, reduces rodless cavity oil pressure, pressure
Fluctuation is little, eliminates pocketed oil phenomenon and is caused due to pressure jump instantaneous delivery pulsation and noise, preferably described sealing dress
Install and the cushion 8 being adapted on piston 1 and with taper surface 9 is set to, cushion 8 can be made using elastomeric material, should
Structure is conducive to piston 1 to decline when putting in place and plays a part of buffering.
Further, preferably described fuel feed hole 6 is connected with oil inlet pipe, and the spill port is connected with oil return pipe, the oil return
The normally closed solenoid directional control valve that closes when stretching out for piston rod is provided with pipe, and preferably described normally closed solenoid directional control valve is set to
Two-position two-way electromagnetic directional valve, the structure control is simple, low cost.
Further, in the cylinder body, side corresponding with rodless cavity is provided with rod cavity, and the rod chamber is provided with oil-feed
Mouth I.
Embodiment two
It is illustrated in figure 4 the sectional view of second embodiment of anti-impact hydraulic oil cylinder of the present invention；The present embodiment and reality
Apply the difference that example one compares to be：Further, taper surface is provided with the cylinder base inwall, the spill port is arranged on
On taper surface, compared with embodiment one, the oil return hole number is few for the structure, and processing is relatively easy, and processing cost is low.
The other structures of the present embodiment are identical with first embodiment, no longer tire out one by one and state.
Embodiment three
It is illustrated in figure 5 the sectional view of the third embodiment of anti-impact hydraulic oil cylinder of the present invention；The present embodiment and reality
Apply the difference that example two compares to be：The spill port is arranged on cylinder base inwall, and the sealing device is set to piston
Side wall, in the present embodiment, spill port is set directly on cylinder base inwall, piston be located at rodless cavity bottom when, pistons end with
Between oil sealing, side wall is just used for sealing spill port, and the structure does not affect the service behaviour of piston, the structure and embodiment two-phase
Relatively, processing is simpler, and cost is lower, but pressure oscillation is big.
Example IV
Difference of the present embodiment compared with embodiment one is：The piston is identical with the diameter of piston rod, should
Structure is mainly used for plunger case.
The other structures of the present embodiment are identical with first embodiment, no longer tire out one by one and state.
Embodiment five
Difference of the present embodiment compared with embodiment one is：In the cylinder body, side corresponding with rodless cavity is set to
Rod chamber, the rod chamber are provided with air inlet, arrange silencer and air cleaner at the air inlet；As long as the structure
Under the high temperature conditions, rod chamber end seals easy senile abrasion for consideration, produces leakage, and hydraulic oil is apt to deteriorate, the present embodiment liquid
Compressing cylinder rod chamber adopts vacant or air-suction state, and it is dust-proof that hydraulic jack rod chamber is made using heat resistant and wear resistant material
Circle, reduces leakage.
The other structures of the present embodiment are identical with first embodiment, no longer tire out one by one and state.
Finally illustrate, preferred embodiment above is only unrestricted in order to technical scheme to be described, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
Various changes are made in form and to which in details, without departing from claims of the present invention limited range.
Claims (8)
1. a kind of anti-impact hydraulic oil cylinder, including cylinder body, is arranged on the work that cylinder body inner carrier and one end are fixedly connected with the piston
Stopper rod, the cylinder base are provided with bottom, between the bottom and piston formed rodless cavity, be communicated with the rodless cavity into
Oilhole, it is characterised in that：Spill port is also associated with the rodless cavity, be provided with the piston and rodless cavity bottom be located at for which
The sealing device of the spill port is sealed during portion, on the cylinder base inwall or bottom is stretched on the end face of cylinder body one end and is provided with cone
Shape face, the spill port are arranged on taper surface.
2. anti-impact hydraulic oil cylinder as claimed in claim 1, it is characterised in that：The spill port is arranged in cylinder base
On wall, the sealing device is set to piston side wall.
3. anti-impact hydraulic oil cylinder as claimed in claim 1, it is characterised in that：The sealing device is set to installed in work
The cushion being adapted to beyond the Great Wall and with taper surface.
4. the anti-impact hydraulic oil cylinder as described in claim 1-3 is arbitrary, it is characterised in that：The fuel feed hole is connected with oil-feed
Pipe, the spill port are connected with oil return pipe, are provided with the normally closed electromagnetism that closes when stretching out for piston rod and change on the oil return pipe
To valve.
5. anti-impact hydraulic oil cylinder as claimed in claim 4, it is characterised in that：The piston and the diameter of piston rod
Identical.
6. anti-impact hydraulic oil cylinder as claimed in claim 4, it is characterised in that：Corresponding with rodless cavity one in the cylinder body
Side is provided with rod cavity, and the rod chamber is provided with air inlet, arranges silencer and air cleaner at the air inlet.
7. anti-impact hydraulic oil cylinder as claimed in claim 4, it is characterised in that：Corresponding with rodless cavity one in the cylinder body
Side is provided with rod cavity, and the rod chamber is provided with oil-in I.
8. anti-impact hydraulic oil cylinder as claimed in claim 4, it is characterised in that：The normally closed solenoid directional control valve is set to two
Two electric change valves of position.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103256274A CN103256274A (en) | 2013-08-21 |
| CN103256274B true CN103256274B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310208664.2A Active CN103256274B (en) | 2013-05-30 | 2013-05-30 | Anti-impact hydraulic oil cylinder |
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| CN (1) | CN103256274B (en) |
Families Citing this family (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 |
| CN112879385B (en) * | 2021-01-11 | 2022-04-08 | 南京航空航天大学 | Integrated actuating device based on flexible cavity group and peak-pressure flow-dividing single-piston pump |
| 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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|---|---|---|---|---|
| CN201023418Y (en) * | 2006-12-11 | 2008-02-20 | 杨晶菁 | Automatic semi-connection hydraulic device for manual shift automobile |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1319005B1 (en) * | 2000-10-16 | 2003-09-19 | Luciano Migliori | COMPACT PNEUMATIC CYLINDER WITH CUSHIONING DEVICE |
| 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 | 李新德 | Large-scale gate type plate shearing machine hydraulic cylinder with buffer function |
| CN102943789B (en) * | 2012-11-09 | 2015-12-09 | 昆明中铁大型养路机械集团有限公司 | The buffering hydraulic cylinder of a kind of adjustable pressure and flow, controlling 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201023418Y (en) * | 2006-12-11 | 2008-02-20 | 杨晶菁 | Automatic semi-connection hydraulic device for manual shift automobile |
| 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 |
Also Published As
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|---|---|
| CN103256274A (en) | 2013-08-21 |
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| SE01 | Entry into force of request for substantive examination | ||
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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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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
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. |