CN201129332Y - Reinforcement hydraulic oil cylinder - Google Patents
Reinforcement hydraulic oil cylinder Download PDFInfo
- Publication number
- CN201129332Y CN201129332Y CNU2007200449529U CN200720044952U CN201129332Y CN 201129332 Y CN201129332 Y CN 201129332Y CN U2007200449529 U CNU2007200449529 U CN U2007200449529U CN 200720044952 U CN200720044952 U CN 200720044952U CN 201129332 Y CN201129332 Y CN 201129332Y
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- Prior art keywords
- piston
- cavity
- cylinder body
- small
- spacer
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- Expired - Fee Related
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Abstract
The utility model discloses a force-increasing hydraulic oil cylinder, a cylinder body is internally equipped with a piston rod, a large piston and a small piston are arranged on the piston rod, the large piston is in the front, the small piston is at the rear, spacer sleeves which are in sliding engagement are arranged between the small 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 all communicated with a front oil hole, and a cavity between the large piston and the bottom of the spacer sleeve and a cavity between the small piston and the rear end cover are all communicated with a rear oil hole. When the rear oil hole is in oil-feeding and the front oil hole is in oil-discharging, the thrust force acted on the two pistons is added, thereby having obvious boosting action. The force-increasing hydraulic oil cylinder is particularly adaptable to application occasions which are limited in spatial location and need relatively large clamping force, and is fine in using effect, low in manufacturing cost and convenient in mounting and using.
Description
Technical field
The utility model relates to a kind of hydraulic jack, particularly has 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.
The model utility content
The utility model provides a kind of reinforcement hydraulic jack with boosting function, and this oil cylinder fabricating cost is low, easy to install, applied range, and using effect is good.
The technical solution of the utility model is: the reinforcement hydraulic jack 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 utility model 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, the utility model fabricating cost 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 utility model 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 in the utility model, 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 the utility model structural representation.
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 reinforcement hydraulic jack, 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 reinforcement hydraulic jack 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 |
|---|---|---|---|
| CNU2007200449529U CN201129332Y (en) | 2007-11-20 | 2007-11-20 | Reinforcement hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200449529U CN201129332Y (en) | 2007-11-20 | 2007-11-20 | Reinforcement hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129332Y true CN201129332Y (en) | 2008-10-08 |
Family
ID=40017174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200449529U Expired - Fee Related CN201129332Y (en) | 2007-11-20 | 2007-11-20 | Reinforcement hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201129332Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235497A (en) * | 2010-04-30 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | Air cylinder and punching machine using same |
| CN103180091A (en) * | 2010-11-24 | 2013-06-26 | 克斯美库股份有限公司 | Cylinder device with boost mechanism |
| CN103557201A (en) * | 2013-11-18 | 2014-02-05 | 徐州徐工液压件有限公司 | Pressure cylinder |
| CN106438562A (en) * | 2016-11-10 | 2017-02-22 | 金焊机械（太仓）有限公司 | Concealed double-layer pneumatic cylinder |
-
2007
- 2007-11-20 CN CNU2007200449529U patent/CN201129332Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235497A (en) * | 2010-04-30 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | Air cylinder and punching machine using same |
| CN102235497B (en) * | 2010-04-30 | 2014-12-31 | 深圳富泰宏精密工业有限公司 | Air cylinder and punching machine using same |
| 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 |
| CN103557201A (en) * | 2013-11-18 | 2014-02-05 | 徐州徐工液压件有限公司 | Pressure cylinder |
| CN103557201B (en) * | 2013-11-18 | 2015-12-09 | 徐州徐工液压件有限公司 | Pressure cylinder |
| CN106438562A (en) * | 2016-11-10 | 2017-02-22 | 金焊机械（太仓）有限公司 | Concealed double-layer pneumatic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081008 Termination date: 20091221 |