CN103452946A - Novel hydraulic cylinder - Google Patents
Novel hydraulic cylinder Download PDFInfo
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- CN103452946A CN103452946A CN2013104014969A CN201310401496A CN103452946A CN 103452946 A CN103452946 A CN 103452946A CN 2013104014969 A CN2013104014969 A CN 2013104014969A CN 201310401496 A CN201310401496 A CN 201310401496A CN 103452946 A CN103452946 A CN 103452946A
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- buffering
- piston rod
- hydraulic cylinder
- throttling
- oil groove
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Abstract
The invention discloses a novel hydraulic cylinder, comprising a piston rod, a large buffering sleeve, a large spring, a piston, a small spring, a small buffering sleeve, a clamping key, an end cover, a throttling oil groove, a buffering cavity and a balancing oil groove. The novel hydraulic cylinder disclosed by the invention has the advantages that by separation of the sealing function and the throttling function of the buffering cavity and adoption of a variable-throttling buffering technology formed by relative sliding between the buffering sleeves and the piston rod, the buffering performance and the reliability of the hydraulic cylinder are improved and the processing accuracy is reduced.
Description
Technical field
The present invention relates to hydraulic element, be specifically related to a kind of novel hydraulic cylinder.
Background technique
The engineering machinery such as bulldozer, excavator is operation under the load such as heavy duty, high frequency, high speed and sudden change for a long time, for meeting its working performance requirement, must use the high-performance buffering hydraulic cylinder.Usually adopt plunger plug-in type gap throttling technology.By matching gap, the hydraulic oil in buffer cavity is sealed and throttling simultaneously.Thereby the buffering of realization.But the oil hydraulic cylinder of this structure requires to have high coaxality, minimum matching gap between buffer plunger and cushion hole, thereby causes machining accuracy higher; And be subject to the impact of the time-varying parameter couplings such as throttling groove flow area, matching gap and length in buffering course, shock-absorbing capacity is difficult to optimize; In addition, in the insertion repeatedly of high-speed overload effect lower plunger also wear out failure very easily.
Summary of the invention
Purpose of the present invention, exactly in order to solve the problem of above-mentioned existing existence, a kind of novel hydraulic cylinder is provided, the buffer cavity sealing is separated with throttling function, and the variable throttling buffer technology that between binding buffer cover and piston rod, relative sliding forms, improve its shock-absorbing capacity and reliability, and reduced machining accuracy.
By the following technical solutions: a kind of novel hydraulic cylinder comprises piston rod 1, large cushion collar 2, big spring 3, piston 4, little spring 5, minibuffer cover 6, card key 7, end cap 8, throttling oil groove 9, buffer cavity 10, balance oil groove 11.The large and small buffer locations of piston rod is set with large cushion collar 2 and minibuffer cover 6.Adopt Spielpassung between each cushion collar and piston rod buffer locations and can slide to axial, and on the piston rod at its relative sliding position, be provided with many axial uniform buffering variable throttling oil grooves 9 and many circumferential uniform balance oil grooves 11, cushion collar return spring 3 and 5 are set simultaneously between cushion collar and piston, minibuffer cover 6 is close to card key 7 left sides under little spring 5 effects, and large cushion collar 2 is close to the shaft shoulder end face (as shown in Figure 1) of the large buffer locations of piston rod under big spring 3 effects.
Described cushion collar and piston rod are the formula of being slidably matched, and the relative sliding on piston rod forms the variable throttling buffering by cushion collar.
Described piston rod arranges annular balance oil groove in buffer locations (with the cushion collar cooperation place), the balance oil groove communicates (as shown in Figure 1) with the throttling oil groove, utilize the buffering high pressure oil to realize the float support of cushion collar, improved the lubrication state of friction pair, reduced friction factor.
The accompanying drawing explanation
Fig. 1 hydraulic cylinder structure.
1-piston rod, the large cushion collar of 2-, 3-big spring, 4-piston, 5-little spring, 6-minibuffer cover, 7-card key, 8-end cap, 9-throttling oil groove, 10-buffer cavity, 11-balance oil groove in figure.
Fig. 2 cushions done state
Embodiment
When piston rod, l moves right.When the end face of minibuffer cover 6 and the shrinkage pool shoulder end face of end cap 8 are fitted, piston 4 the right form high-pressure buffer chambeies 10, and buffer structure enters buffering working state (as shown in Figure 1).When piston rod l continues to move right, extruding buffer cavity inner fluid, oil liquid pressure raises, minibuffer cover 6 because fitting tightly the shrinkage pool shoulder end face at end cap 8 under the effect of buffer cavity pressure, fluid in buffer cavity can only flow out by buffering throttling groove 9 on piston rod, and along with piston rod 1 continues to move right, little spring 5 is compressed gradually, because buffering throttling groove cross section reduces gradually along with the increase of cushion stroke, and piston rod l speed under the resistance of buffer cavity high pressure oil slows down, the variable throttling buffering makes buffer function even.When piston rod l approaches stroke end, its speed is substantially close to zero.In the simultaneous buffering chamber also substantially without pressure.Whole buffering course finishes immediately, and oil cylinder is realized braking, as shown in Figure 2.
When the oil cylinder reverse starting, when piston rod is to left movement, fluid enters through the oil-through hole of end cap 8.Promote minibuffer cover 6 Compress Spring to left movement segment distance. open the laminating end face of minibuffer cover 6 and end cap 8, thereby enter fast rodless cavity. realize the quick startup of piston rod l.Afterwards, minibuffer cover 6 will also will reset rapidly under the effect of little spring 5.This buffering method is compared plunger plug-in type damping device. and its major advantage is: sealing and throttling that the end face subsides platform of cushion collar and throttling groove have been realized respectively buffer cavity easily promote its shock-absorbing capacity, and have improved its reliability.Reduced difficulty of processing.
Claims (3)
1. a novel hydraulic cylinder, is characterized in that: comprise piston rod 1, large cushion collar 2, big spring 3, piston 4, little spring 5, minibuffer cover 6, card key 7, end cap 8, throttling oil groove 9, buffer cavity 10, balance oil groove 11.
2. novel hydraulic cylinder according to claim 1, it is characterized in that: described cushion collar and piston rod are the formula of being slidably matched, and the relative sliding on piston rod forms the variable throttling buffering by cushion collar.
3. novel hydraulic cylinder according to claim 1, it is characterized in that: described piston rod arranges annular balance oil groove in buffer locations (with the cushion collar cooperation place), and the balance oil groove communicates with the throttling oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104014969A CN103452946A (en) | 2013-09-05 | 2013-09-05 | Novel hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104014969A CN103452946A (en) | 2013-09-05 | 2013-09-05 | Novel hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103452946A true CN103452946A (en) | 2013-12-18 |
Family
ID=49735672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104014969A Pending CN103452946A (en) | 2013-09-05 | 2013-09-05 | Novel hydraulic cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN103452946A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775308A (en) * | 2014-01-28 | 2014-05-07 | 南通市红星空压机配件制造有限公司 | Buffer piston structure of compressor |
| CN105090159A (en) * | 2015-08-29 | 2015-11-25 | 济南大学 | Low-friction and quick-start hydraulic cylinder based on flutter mechanism |
| CN107816469A (en) * | 2017-12-04 | 2018-03-20 | 合肥工业大学 | A kind of dither servo hydraulic cylinder |
| CN108006007A (en) * | 2017-12-14 | 2018-05-08 | 中船重工中南装备有限责任公司 | Mechanical interlocking two-stage hydraulic cylinder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498402Y (en) * | 2001-08-23 | 2002-07-03 | 赵怀文 | Fuel cylinder with piston reversing damp |
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特***压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| CN101907110A (en) * | 2010-09-12 | 2010-12-08 | 韶关液压件厂有限公司 | Multi-damping-hole buffer sleeve hydraulic cylinder |
| CN102108991A (en) * | 2010-07-23 | 2011-06-29 | 三一重工股份有限公司 | Hydraulic cylinder and relative device thereof, hydraulic buffer system, excavator and concrete pump truck |
-
2013
- 2013-09-05 CN CN2013104014969A patent/CN103452946A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498402Y (en) * | 2001-08-23 | 2002-07-03 | 赵怀文 | Fuel cylinder with piston reversing damp |
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特***压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| CN102108991A (en) * | 2010-07-23 | 2011-06-29 | 三一重工股份有限公司 | Hydraulic cylinder and relative device thereof, hydraulic buffer system, excavator and concrete pump truck |
| CN101907110A (en) * | 2010-09-12 | 2010-12-08 | 韶关液压件厂有限公司 | Multi-damping-hole buffer sleeve hydraulic cylinder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775308A (en) * | 2014-01-28 | 2014-05-07 | 南通市红星空压机配件制造有限公司 | Buffer piston structure of compressor |
| CN105090159A (en) * | 2015-08-29 | 2015-11-25 | 济南大学 | Low-friction and quick-start hydraulic cylinder based on flutter mechanism |
| CN107816469A (en) * | 2017-12-04 | 2018-03-20 | 合肥工业大学 | A kind of dither servo hydraulic cylinder |
| CN108006007A (en) * | 2017-12-14 | 2018-05-08 | 中船重工中南装备有限责任公司 | Mechanical interlocking two-stage hydraulic cylinder |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |