CN101440831A - Single-piston rod two-stage hydraulic oil cylinder - Google Patents
Single-piston rod two-stage hydraulic oil cylinder Download PDFInfo
- Publication number
- CN101440831A CN101440831A CNA2007101900553A CN200710190055A CN101440831A CN 101440831 A CN101440831 A CN 101440831A CN A2007101900553 A CNA2007101900553 A CN A2007101900553A CN 200710190055 A CN200710190055 A CN 200710190055A CN 101440831 A CN101440831 A CN 101440831A
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- piston
- cavity
- piston rod
- small
- rear end
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Abstract
The invention discloses a double-stage hydraulic oil cylinder with a single piston rod. One piston rod in the cylinder is provided with a large piston and a small piston, the large piston is in front, the small piston is at back, a spacer sleeve in slide fit is arranged between the smaller piston and the cylinder body, a cavity between the large piston and a front end cover and a cavity between the small piston and the bottom of the spacer sleeve are communicated with a front oil hole together, and a cavity between the large piston and the bottom of the spacer sleeve and a cavity between the small piston and a back end cover are communicated with a back oil hole together. When the back oil hole is fed with oil and the front oil hole discharges, thrusts acted on the two pistons are added, and have remarkable function of reinforcement. The double-stage hydraulic oil cylinder is particularly suitable for application occasions of limited spatial positions and needing larger gripping power, and has the advantages of good usage effect, low manufacturing cost, and convenient installation and use.
Description
Technical field
The present invention relates to a kind of hydraulic jack, particularly have the single-piston rod two-stage hydraulic oil cylinder of boosting function.
Background technique
In the mechanical processing process, often adopt hydraulic jack to come clamping work pieces, hydraulic jack commonly used is on the piston rod in cylinder body a piston to be housed, and its clamping force depends on the size of piston effective area.For the less oil cylinder of volume, clamping force is also less, often can not satisfy the needs of big clamping force, if strengthen the oil cylinder volume, not only increases cost, also increases the difficulty of installing and using.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of single-piston rod two-stage hydraulic oil cylinder with boosting function, and this oil cylinder fabricating cost is low, easy to install, applied range, and using effect is good.
Technological scheme of the present invention is: single-piston rod two-stage hydraulic oil cylinder comprises cylinder body, piston rod, piston and forward and backward end cap, and cylinder body or front and back ends cover and be provided with forward and backward oilhole, piston rod front end dress piston, and stretch out outside the rear end cover rear end.Its improvements are that described piston is divided into big piston and two pistons of small piston, big piston is near front cover, small piston is near rear end cover, be provided with spacer between small piston and the cylinder body, the spacer bottom is between large and small piston, and become to be slidingly matched with piston rod, cavity between big piston and the front cover and small piston are connected with preceding oilhole jointly with cavity between the spacer bottom, big piston between bottom spacer cavity and small piston is common with the cavity between the rear end cover and afterwards oilhole be connected.
Described spacer becomes to be slidingly matched with cylinder body.Seal ring is equipped with in cooperation place between described cylinder body, end cap, piston, the piston rod.
On the piston rod of the present invention in same cylinder body two pistons are housed, wherein are provided with spacer between small piston and the cylinder body, in fact form two oil cylinders.When back oilhole oil-feed, when preceding oilhole is fuel-displaced, act on two thrust additions on the piston, the oil cylinder clamping force is increased.Like this under the situation that does not strengthen the oil cylinder volume and play the effect of reinforcement.With respect to the single-stage oil cylinder that reaches equal clamping force, fabricating cost of the present invention is low, and volume is little, and is easy to install, especially is fit to the limited and occasion of the big clamping force of needs in spatial position, applied range, and using effect is good.Further improvement of the present invention is that described spacer becomes to be slidingly matched with cylinder body, not only easy to loading and unloading, and current oilhole oil-feed, back oilhole be when fuel-displaced, and spacer has proal trend, be pressed on the big piston, because the front-back product moment, big piston moves after under the effect of thrust difference, in addition the suffered thrust of small piston, piston rod is motion backward smoothly still, unclamp workpiece, just the power of unclamping is significantly less than clamping force, these also realistic requirements of one's work.In addition, the sectional area that is located at the passage that is connected with forward and backward oilhole respectively on the piston rod can be made the former greater than the latter among the present invention, can make piston rod backward movement velocity promptly clamp at a slow speed greater than the speed of travelling forward, unclamp fast, further improve using effect.
Description of drawings
It shown in the accompanying drawing structural representation of the present invention.
Embodiment
Referring to accompanying drawing, the front cover 1 of cylinder body 3 is provided with preceding oilhole 2, the cylinder body afterbody is provided with back oilhole 7, be provided with big piston 4 and small piston 6 in the cylinder body, be provided with the spacer 5 that is slidingly matched between small piston 6 and the cylinder body, the front end of piston rod 8 links to each other with large and small piston, stretch out outside the rear end cover 9 rear end, pressing plate 10 is installed in the rear end, cavity a between big piston and the front cover and small piston are connected with preceding oilhole 2 jointly with cavity c between the spacer bottom, big piston between bottom spacer cavity b and small piston is common with the cavity d between the rear end cover and afterwards oilhole 7 be connected.Be located at the cross section of the cross section of the passage 12 that is connected with forward and backward oilhole respectively on the piston rod greater than passage 11.
Claims (2)
1, a kind of single-piston rod two-stage hydraulic oil cylinder, comprise cylinder body, piston rod, piston and before, rear end cover, cylinder body or preceding, before rear end cover is provided with, back oilhole, piston rod front end dress piston, stretch out outside the rear end cover rear end, it is characterized in that described piston is divided into big piston and two pistons of small piston, big piston is near front cover, small piston is near rear end cover, be provided with spacer between small piston and the cylinder body, the spacer bottom is positioned at big, between the small piston, and become to be slidingly matched with piston rod, cavity between big piston and the front cover and small piston are connected with preceding oilhole jointly with cavity between the spacer bottom, big piston between bottom spacer cavity and small piston is common with the cavity between the rear end cover and afterwards oilhole be connected.
2, by the described single-piston rod two-stage hydraulic oil cylinder of claim 1, it is characterized in that: described spacer becomes to be slidingly matched with cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101900553A CN101440831A (en) | 2007-11-20 | 2007-11-20 | Single-piston rod two-stage hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101900553A CN101440831A (en) | 2007-11-20 | 2007-11-20 | Single-piston rod two-stage hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101440831A true CN101440831A (en) | 2009-05-27 |
Family
ID=40725391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101900553A Pending CN101440831A (en) | 2007-11-20 | 2007-11-20 | Single-piston rod two-stage hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101440831A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744354A (en) * | 2012-05-23 | 2012-10-24 | 山东同力达智能机械有限公司 | Double-acting hydraulic riveter for short-tail rivet |
| CN107327440A (en) * | 2017-09-05 | 2017-11-07 | 烟台未来自动装备有限责任公司 | Three controllable hydraulic fluid port two-stage double acting hydraulic cylinders of a kind of sequence of movement |
-
2007
- 2007-11-20 CN CNA2007101900553A patent/CN101440831A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744354A (en) * | 2012-05-23 | 2012-10-24 | 山东同力达智能机械有限公司 | Double-acting hydraulic riveter for short-tail rivet |
| CN107327440A (en) * | 2017-09-05 | 2017-11-07 | 烟台未来自动装备有限责任公司 | Three controllable hydraulic fluid port two-stage double acting hydraulic cylinders of a kind of sequence of movement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090527 |