CN85103772A - Has the oil hydraulic cylinder that power multiplication is used - Google Patents
Has the oil hydraulic cylinder that power multiplication is used Download PDFInfo
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- CN85103772A CN85103772A CN198585103772A CN85103772A CN85103772A CN 85103772 A CN85103772 A CN 85103772A CN 198585103772 A CN198585103772 A CN 198585103772A CN 85103772 A CN85103772 A CN 85103772A CN 85103772 A CN85103772 A CN 85103772A
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- hydraulic cylinder
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Abstract
Be the size of the oil hydraulic cylinder (1) of avoiding power multiplication to use and the increase of weight, be equipped with the primary piston (2) of a single-stage and the secondary piston (3) of a secondary.The piston rod (4) of primary piston (2) passes secondary piston (3).Cylinder (1) is by cylinder cap (16) sealing, and piston rod (4) is also by cylinder cap (16).Two blocking pistons (22,24) that bear different springs (21,23) effects and cylinder (1) are by global design.Opening piston (33,34) for two is positioned on the relative position of blocking piston (22,24).
Description
The present invention relates to a kind of internal pressure transmission type hydraulic cylinder pressure of the multiplication of exerting all one's strength.
Oil hydraulic cylinder use in many instances all need earlier one fast but the less motion of strength then then one at a slow speed, short distance but the bigger motion of strength.When device fabrication, in using working machine and press arrangement structure, drop hammer and take out in the tool underground engineering of exchanging work in use, all be equipped with and be with hydraulicdriven oil hydraulic cylinder.This cylinder is compacter and in light weight than the single stage hydraulic cylinder with same purpose power.
The scheme of being made up of two tandem pistons and three pressure chambers is well-knownly (to see GB-PS 1600733; GB-PS 1420389; US-PS 4011724; DE-OS 3119307 AI).This structural requirement has a partition wall between two pistons.These pistons in the course of the work, (for example in clamping process) moves along same direction, its consequence is that the length of oil hydraulic cylinder must increase a partition wall thickness.In case when primary piston was not obstructed on stroke, it will arrive cylinder cap, the reinforcement process promptly begins, and then must respective design get more firmly for avoiding the cylinder cap pressure break, and this means increases size and weight.
Of the present invention is to eliminate these shortcomings, is to realize by the characteristic of independent claim 1.
Most preferred embodiment of the present invention can obtain from the subordinate claim.
Accompanying drawing has been represented a kind of embodiment of the present invention.
Be the primary piston 2 of a single-stage and the secondary piston 3 of a secondary in cylinder 1, the piston rod that links to each other with primary piston 2 passes secondary piston 3.Primary piston 2 has the circular groove 5 of a band seal ring 6.Secondary piston comprises 7 and 8 parts that are made of two steps, and its diameter is different.On the outer circle of secondary piston 3, promptly on part 7 and 8, have the circular groove 9 and 10 of seal ring 11 or 12 respectively.On the part 8 of secondary piston 3,, the circular groove 14 of a band seal ring 15 is arranged also in order in the hole 13 of passing piston rod.By cylinder cap 16 sealings, piston rod 4 passes this cylinder cap to cylinder 1 in secondary piston 3 one sides.A circular groove 18 that has seal ring 19 is arranged in the hole 17 of cylinder cap.In the projection 20 of cylinder side and cylinder formation one, be provided with first blocking piston 22 and second blocking piston 24 that is acted on by second strong spring that is acted on by the first tender constitution spring 21.No matter first or second blocking piston all is the secondary formula, wherein 25 and 26 section diameters are bigger, and 27 and 28 section diameters are less.What diameter was little 27 is connected with 30 with piston 29 respectively with 28 parts, and they lead to respectively in the cavity relative with blocking piston 31 and 32, are provided with to open piston 33 and 34 in cavity 31 and 32.Hydraulic medium supplying tube 35 leads to piston rod 29 and opens in the cavity 31 in the zone between the end face of piston 33, and cavity 31 is connected by pipeline 36 with 32.Link to each other with first pressure chamber 39 between primary piston and the casing wall by pipeline 38 around the cavity 37 of the front portion 27 of first blocking piston 22.On pipeline 38, there is an arm 40 to lead in the multistage chamber 41 between the inwall of the part 7 of secondary piston 3 and cylinder 1.This multistage chamber 41 is to be limited by the flange 43 on the inwall of flange 42 on the outer circle of secondary piston 3 and cylinder 1 laterally.Link to each other with second pressure chamber 45 between the end face 46 of relative secondary piston of cylinder cap and cylinder cap by hydraulic medium guide passage 44 around the cavity of the front portion 28 of second blocking piston 24.Cavity 47 between the primary and secondary piston is to link to each other with 34 right side cavity by conduit 48 and as shown in the figure unlatching piston 33.
The function of this oil hydraulic cylinder below is described:
Make when moving behind first blocking piston 22 that is acted on by tender constitution spring 21 in case the pressure in the supplying tube 35 is elevated to, hydraulic medium just flows in first pressure chamber 39 of primary piston 2 back and primary piston is travelled forward.Till this process lasts till that primary piston 2 is obstructed.This moment second, blocking piston 24 was opened, and first blocking piston is closed.Hydraulic medium flows in the second other pressure chamber 45 of cylinder cap 16, the cross section 46 that at this moment diameter of secondary piston 3 the is bigger load that will be stressed.Secondary piston 3 can move, and at this moment, the hydraulic medium between the flange 42 and 43 of secondary piston and oil hydraulic cylinder just is pressed in first pressure chamber 39 of primary piston 2 back by multistage chamber 41.Primary piston 2 with cross section 43 will be to travel forward than the speed of (49/42) corresponding reduction and the power of rising with area.In case the pressure in the supplying tube 35 reaches predetermined value, then the working procedure of being undertaken by piston rod 4 (for example clamping process) promptly comes to an end.Second blocking piston 24 is closed equally.This latter two blocking piston is all used as safety valve.
When the primary and secondary piston was done above-mentioned motion, hydraulic medium was imported into the container that does not mark by conduit 48 from stress-free cavity 47.
When decontroling, conduit 48 is stressed.Open piston 33 and 34 for two blocking piston 22 and 24 is opened, primary piston 2 and secondary piston 3 separated from one another and arrival initial positions.Hydraulic medium from stress-free cavity 39,41 and 45 by opened blocking piston 22 and 24 and conduit 35 flow into without in the container that marks.
If primary piston 2 is not subjected to resistance on its stroke forward, till then it moves to the opening of the conduit in the cavity 47 48 covered always.Secondary piston 2 also just can not be moved, and reason is that oil extraction is hindered.When elongated and commutation process carried out between Shun before conduit 48 is opened when quick stroke, piston 2 was mutually circuitous each other with 3.In both cases, oil hydraulic cylinder can not take place damage, and never cause the very big power that is subjected to.
Claims (4)
1, have the oil hydraulic cylinder that power multiplication is used, it is characterized in that, the secondary piston (3) of a primary piston of a single-stage (2) and a secondary, the piston rod (4) of primary piston (2) passes secondary piston (3)
2, oil hydraulic cylinder according to claim 1 is characterized in that, step (42,43) is arranged on the inside wall of cylinder, has just formed a classification chamber (41) like this between the inside wall of cylinder of the secondary piston (3) of secondary and cylinder outer wall.
3, oil hydraulic cylinder according to claim 2 is characterized in that, classification cylinder (41) links to each other with first pressure chamber (39) that forms between primary piston (2) and cylinder (1) by a hydraulic medium conduit (38).
4, oil hydraulic cylinder according to claim 3, it is characterized in that hydraulic medium delivery pipe (35) links to each other with first pressure chamber (39) by first blocked valve (22) and links to each other with second pressure chamber (45) that forms by second blocked valve (24) between secondary piston (3) and cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585103772A CN85103772A (en) | 1985-05-16 | 1985-05-16 | Has the oil hydraulic cylinder that power multiplication is used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198585103772A CN85103772A (en) | 1985-05-16 | 1985-05-16 | Has the oil hydraulic cylinder that power multiplication is used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85103772A true CN85103772A (en) | 1986-11-12 |
Family
ID=4793426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198585103772A Pending CN85103772A (en) | 1985-05-16 | 1985-05-16 | Has the oil hydraulic cylinder that power multiplication is used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85103772A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103180091A (en) * | 2010-11-24 | 2013-06-26 | 克斯美库股份有限公司 | Cylinder device with boost mechanism |
-
1985
- 1985-05-16 CN CN198585103772A patent/CN85103772A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103180091A (en) * | 2010-11-24 | 2013-06-26 | 克斯美库股份有限公司 | Cylinder device with boost mechanism |
| CN104723149A (en) * | 2010-11-24 | 2015-06-24 | 克斯美库股份有限公司 | Cylinder device with force multiplier |
| CN103180091B (en) * | 2010-11-24 | 2015-07-08 | 克斯美库股份有限公司 | Cylinder device with boost mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |