CN101008415A - Oil cylinder of high speed and precision numerical control hydraulic machine without cylinder bottom - Google Patents
Oil cylinder of high speed and precision numerical control hydraulic machine without cylinder bottom Download PDFInfo
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- CN101008415A CN101008415A CN 200710019830 CN200710019830A CN101008415A CN 101008415 A CN101008415 A CN 101008415A CN 200710019830 CN200710019830 CN 200710019830 CN 200710019830 A CN200710019830 A CN 200710019830A CN 101008415 A CN101008415 A CN 101008415A
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Abstract
The invention discloses a non-bottom cylinder of digit-control accurate hydraulic machine, comprising a cylinder with a piston separating the cylinder into upper and lower chambers; a piston rod sealed with the lower opening of cylinder and protrude from the lower chamber; the end of upper chamber is arranged with a valve; the valve is arranged with an oil chamber toward upper chamber and connected to the oil opening at the top of valve; the valve is arranged with a valve element formed by valve disc and valve rod; the valve rod is vertically fixed at the central of valve disc; the lower opening of oil chamber is arranged with a valve base sealed with the circumference of valve disc; the valve rod upwards protrudes outside the valve; one return spring sheathing the valve rod contacts the upper end of valve, while another end of return spring is fixed with the upper end of valve rod; the valve is fixed with a start cylinder which contains a small piston sheathing the upper end of valve rod. The invention arranges the valve at the bottom of cylinder, with high respond speed, high reflux and the application for the high-speed operation of sliding block of hydraulic machine.
Description
Technical field
The present invention relates to a kind of hydraulic press, particularly a kind of oil cylinder of high speed and precision numerical control hydraulic machine.
Background technique
In the prior art, a kind of high speed and precision numerical control hydraulic machine is arranged, this hydraulic press mainly relies on hydraulic pressure that workpiece is carried out punch process, during work, it is by the oil-feed and the oil return of oil cylinder, promote slide block movement, realize punch process, in the to-and-fro motion process of slide block, the part process is uncharge operating mode, at this moment need the quick acting of slide block energy, be used for press work to save time, for adapting to this work, its oil cylinder mainly comprises the cylinder body of tubular, be provided with piston in the cylinder body, piston is divided into epicoele and cavity of resorption with cylinder body, and piston rod one end that links to each other with piston axially is connected outside cavity of resorption stretches out cylinder body and with the slide block of hydraulic press, be tightly connected between piston rod and the cylinder body end opening, the cylinder ends of epicoele correspondence is provided with bottom, is connected with liquid-filling valve through pipeline on the bottom, and cylinder body is provided with the hydraulic fluid port of connecting epicoele and cavity of resorption respectively and is used for turnover oil; Under the hydraulic press no-load operation, slide block relies on gravity descending fast, and its speed can be up to about 500m/s, this needs the speed of response of liquid-filling valve fast, can be fast in a large number to the oil cylinder oil-feed, therefore, inflow pipeline should have enough big flow area, and it is fast that the switching speed of liquid-filling valve is wanted; And this is defective of the prior art just, because liquid-filling valve is far away relatively from the cylinder body distance, and connects by the road, effects such as the on-way resistance of pipeline, throttling make that all the liquid-filling valve speed of response is slack-off.
Summary of the invention
The no cylinder bottom oil cylinder that the purpose of this invention is to provide a kind of high speed and precision numerical control hydraulic machine makes oil cylinder topping up speed fast, adapts to high speed operation better.
The object of the present invention is achieved like this: the no cylinder bottom oil cylinder of high speed and precision numerical control hydraulic machine, the cylinder body that comprises tubular, be provided with piston in the cylinder body, piston is divided into epicoele and cavity of resorption with cylinder body, piston rod one end that links to each other with piston is axially outside cavity of resorption stretches out cylinder body, be tightly connected between piston rod and the cylinder body end opening, the cylinder ends of epicoele is sealedly connected with valve body, be provided with the repairing chamber of opening in the described valve body towards epicoele, the repairing mouth at repairing chamber and valve body top is connected, valve body is provided with the spool of being made up of valve disc and valve rod, valve rod is vertically fixed on the valve disc center, and repairing chamber end opening is provided with the valve seat with the valve disc circumferential seal of spool, and described valve rod protrudes upward outside the valve body, one Returnning spring one end that is sleeved on the valve rod is conflicted in the valve body upper end, the Returnning spring the other end and valve rod upper end relative fixed; Be fixed with on the valve body one with the coaxial setting of valve rod open the valve oil cylinder, open in the valve oil cylinder and be provided with small piston, small piston is nested with in the valve rod upper end portion.
When the present invention works, piston lower end and slide block fix, and cylinder body and frame fix, when slide block quick when descending, open the valve oil oil supply cylinder by giving, it is descending that small piston promotes valve rod, and valve face and valve seat are broken away from, and a large amount of hydraulic oil enter in the cylinder body through the repairing chamber from the repairing mouth, because circumferential seal between valve face and the valve seat, its opening and closing are all very rapid, open the back flow area and sharply increase, and can reach peak rate of flow rapidly; Compared with prior art, the present invention is set directly at cylinder base with valve body, has saved bottom, has the advantage that speed of response is fast, flow is big, can adapt to the high speed operation of slider of hydraulic press.
For alleviating the burden of Returnning spring, improve the closing velocity of spool, be provided with secondary spring between described small piston inner bottom part and the valve body upper-end surface.Secondary spring can be separately with small piston jack-up, and the quality that has been promoted when having reduced the pass valve of Returnning spring can avoid small piston that the switch of spool is produced harmful effect.
The filler opening of epicoele can be arranged on the cylinder body, also can be on valve body.For avoiding excess pressure to damage cylinder body or piston, on described valve body, can also be provided with the pressure release hydraulic fluid port of connecting epicoele.There is mouth that relief valve is set in pressure release, can adjusts the maximum pressure in the cylinder body, cylinder body is operated under the safety pressure.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Wherein, 1 small piston, 2 secondary springs, 3 repairing mouths, 4 pressure release hydraulic fluid ports, 5 pistons, 6 cylinder bodies, the 6a epicoele, the 6b cavity of resorption, 7 piston rods, 8 cavity of resorption hydraulic fluid ports, 9 valve discs, 10 valve bodies, the 10a valve seat, 11 filler openings, 12 repairing chambeies, 13 Returnning springs, 14 valve rods, 15 open the valve oil cylinder.
Embodiment
As figure, no cylinder bottom oil cylinder for high speed and precision numerical control hydraulic machine, the cylinder body 6 that comprises tubular, be provided with piston 5 in the cylinder body 6, piston 5 is divided into epicoele 6a and cavity of resorption 6b with cylinder body 6, the cylinder body 6 of cavity of resorption 6b correspondence is provided with cavity of resorption hydraulic fluid port 8, piston rod 7 one ends that link to each other with piston 5 are axially outside cavity of resorption 6b stretches out cylinder body 6, be tightly connected between piston rod 7 and cylinder body 6 end openings, cylinder body 6 end seals of epicoele 6a are connected with valve body 10, be provided with the repairing chamber 12 of opening in the valve body 10 towards epicoele 6a, repairing chamber 12 is connected with the repairing mouth 3 at valve body 10 tops, valve body 10 is provided with the spool of being made up of valve disc 9 and valve rod 14, valve rod 14 is vertically fixed on valve disc 9 centers, and repairing chamber 12 end openings are provided with the valve seat 10a with valve disc 9 circumferential seals of spool, and described valve rod 14 protrudes upward outside the valve body 10, one Returnning spring 13 1 ends that are sleeved on the valve rod 14 are conflicted in valve body 10 upper ends Returnning spring 13 the other ends and valve rod 14 upper end relative fixed; Be fixed with on the valve body 10 one with valve rod 14 coaxial settings open valve oil cylinder 15, open and be provided with small piston 1 in the valve oil cylinder 15, small piston 1 is nested with in valve rod 14 upper end portions, is provided with secondary spring 2 between small piston 1 inner bottom part and valve body 10 upper-end surfaces; Valve body 10 is provided with filler opening 11 and the pressure release hydraulic fluid port 4 of connecting epicoele 6a.
Claims (4)
1, the no cylinder bottom oil cylinder of high speed and precision numerical control hydraulic machine, the cylinder body that comprises tubular, be provided with piston in the cylinder body, piston is divided into epicoele and cavity of resorption with cylinder body, piston rod one end that links to each other with piston is axially outside cavity of resorption stretches out cylinder body, be tightly connected between piston rod and the cylinder body end opening, it is characterized in that: the cylinder ends of epicoele is sealedly connected with valve body, be provided with the repairing chamber of opening in the described valve body towards epicoele, the repairing mouth at repairing chamber and valve body top is connected, valve body is provided with the spool of being made up of valve disc and valve rod, valve rod is vertically fixed on the valve disc center, and repairing chamber end opening is provided with the valve seat with the valve disc circumferential seal of spool, and described valve rod protrudes upward outside the valve body, one Returnning spring one end that is sleeved on the valve rod is conflicted in the valve body upper end, the Returnning spring the other end and valve rod upper end relative fixed; Be fixed with on the valve body one with the coaxial setting of valve rod open the valve oil cylinder, open in the valve oil cylinder and be provided with small piston, small piston is nested with in the valve rod upper end portion.
2, the no cylinder bottom oil cylinder of high speed and precision numerical control hydraulic machine according to claim 1 is characterized in that: be provided with secondary spring between described small piston inner bottom part and the valve body upper-end surface.
3, the no cylinder bottom oil cylinder of high speed and precision numerical control hydraulic machine according to claim 1 and 2 is characterized in that: described valve body is provided with the filler opening of connecting epicoele.
4, the no cylinder bottom oil cylinder of high speed and precision numerical control hydraulic machine according to claim 1 and 2 is characterized in that: described valve body is provided with the pressure release hydraulic fluid port of connecting epicoele.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100198309A CN100467884C (en) | 2007-01-30 | 2007-01-30 | Oil cylinder of high speed and precision numerical control hydraulic machine without cylinder bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100198309A CN100467884C (en) | 2007-01-30 | 2007-01-30 | Oil cylinder of high speed and precision numerical control hydraulic machine without cylinder bottom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101008415A true CN101008415A (en) | 2007-08-01 |
| CN100467884C CN100467884C (en) | 2009-03-11 |
Family
ID=38697001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100198309A Expired - Fee Related CN100467884C (en) | 2007-01-30 | 2007-01-30 | Oil cylinder of high speed and precision numerical control hydraulic machine without cylinder bottom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100467884C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506264A (en) * | 2018-06-01 | 2018-09-07 | 福建海源自动化机械股份有限公司 | A kind of prefill valve |
| CN108533564A (en) * | 2018-06-01 | 2018-09-14 | 福建海源自动化机械股份有限公司 | A kind of master cylinder structure of Novel winding-type hydraulic press |
| CN110953213A (en) * | 2019-12-13 | 2020-04-03 | 辽宁工程技术大学 | Static and dynamic combined loading quick impact hydraulic cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3613503A (en) * | 1969-04-28 | 1971-10-19 | Cessna Aircraft Co | Hydraulic cylinder with pressure control |
-
2007
- 2007-01-30 CN CNB2007100198309A patent/CN100467884C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506264A (en) * | 2018-06-01 | 2018-09-07 | 福建海源自动化机械股份有限公司 | A kind of prefill valve |
| CN108533564A (en) * | 2018-06-01 | 2018-09-14 | 福建海源自动化机械股份有限公司 | A kind of master cylinder structure of Novel winding-type hydraulic press |
| CN108506264B (en) * | 2018-06-01 | 2023-11-24 | 江西海源复合材料科技股份有限公司 | Liquid filling valve |
| CN110953213A (en) * | 2019-12-13 | 2020-04-03 | 辽宁工程技术大学 | Static and dynamic combined loading quick impact hydraulic cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100467884C (en) | 2009-03-11 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20160130 |
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| EXPY | Termination of patent right or utility model |