CN203176053U - Gap-sealed oil cylinder - Google Patents
Gap-sealed oil cylinder Download PDFInfo
- Publication number
- CN203176053U CN203176053U CN 201320183329 CN201320183329U CN203176053U CN 203176053 U CN203176053 U CN 203176053U CN 201320183329 CN201320183329 CN 201320183329 CN 201320183329 U CN201320183329 U CN 201320183329U CN 203176053 U CN203176053 U CN 203176053U
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- piston
- oil cylinder
- circular groove
- piston rod
- level
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- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a gap-sealed oil cylinder. The gap-sealed oil cylinder comprises a cylinder body, a piston inside the cylinder body and a piston rod connected with the piston and is characterized in that the piston is in a spindle shape with small ends and a large middle portion, the brim of the piston and the inner wall of the cylinder body form ring-cone-shaped throttling grooves, one ring groove is formed between two neighboring ring-cone-shaped throttling grooves along the circumference of the piston, and the ring grooves are communicated with a large cavity of the oil cylinder through holes in the piton rod. According to the structure above, the gap-sealed oil cylinder does not need seal rings or support guide rings and can be started and operated very stably without vibration and crawling.
Description
Technical field
The utility model relates to a kind of oil cylinder, the oil cylinder that especially a kind of startup operates steadily.
Background technique
Oil cylinder is the straight line moving type executive component that the pressure reduction on ouput force and piston effective area and both sides thereof is directly proportional.Its function is can convert hydraulic pressure to mechanical energy.
Existing common oil cylinder all can produce shake and creeping phenomenon when starting and move.Yet in some precision equipment, this type of phenomenon is unallowed.
The model utility content
At the technical problem of above-mentioned existence, the utility model provides a kind of clearance seal formula oil cylinder, and it is very steady that it starts operation.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of clearance seal formula oil cylinder comprises the piston in cylinder body, the cylinder body and the piston rod that is connected with piston, and described piston is the little fusiformis broad in the middle in two, and piston edge and inboard wall of cylinder block form the throttling groove of ring taper; Have circular groove along the piston circumference between two ring tapered joint chutes; Described circular groove is communicated with by the big chamber of the hole on the piston rod and oil cylinder.
As a kind of preferred, described circular groove is former and later two.Two circular grooves are used for centering, make piston rod more stable.
As above-mentioned preferred a kind of improvement, also comprise the intermediate annular groove between two circular grooves.By the hydraulic oil that both sides, front and back circular groove is come, further meeting in intermediate annular groove forms turbulent flow, makes sealing effect better.
As a kind of improvement, the hole on the described piston rod is dug along the piston rod axle center; Also comprise the one-level circular groove on the piston rod anchor ring and the one-level intercommunicating pore of radially digging along piston rod, described one-level intercommunicating pore is communicated with the one-level circular groove with the hole; Along the piston radial cutting secondary intercommunicating pore is arranged, described circular groove relies on the secondary intercommunicating pore to be communicated with the one-level circular groove.Hydraulic oil by introduce in the hole through the one-level circular groove, is assigned on each aspect of circular groove by the secondary intercommunicating pore again, avoids opening too much hole at piston rod.
Usefulness of the present utility model is:
Oil cylinder with said structure need not seal ring and support guide ring, and it starts the operation non-jitter creeps, very steady.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Mark among the figure: 1 cylinder body, 2 pistons, 3 piston rods, 4 throttling grooves, 5 circular grooves, 6 holes, 7 big chambeies, 8 intermediate annular groove, 9 one-level circular grooves, 10 one-level intercommunicating pores, 11 secondary intercommunicating pores.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Piston is divided into two inner chamber of cylinder block, wherein has one side of piston rod loculus, does not have one side of piston rod in big chamber.
As shown in Figure 1:
The utility model comprises the piston 2 in cylinder body 1, the cylinder body 1 and the piston rod 3 that is connected with piston 2, and described piston 2 is the little fusiformis broad in the middle in two, and piston 2 edges and cylinder body 1 inwall form the throttling groove 4 of ring taper; Have circular groove 5 along piston 2 circumference between two ring tapered joint chutes 4; Circular groove 5 is preferably former and later two, can also dig one intermediate annular groove 8 between two circular grooves 5.Described circular groove 5 is communicated with the big chamber 7 of oil cylinder by the hole 6 on the piston rod 3.
During work, hydraulic oil is by ring tapered joint chute 4, because its gap reduces gradually, pressure increases, and flow velocity speeds, and will produce turbulent flow.The generation of turbulent flow consumes lot of energy, and flow velocity reduces, and hydraulic oil is by throttling.By the hole 6 on the piston rod 3 hydraulic oil is caused circular groove 5 simultaneously, hydraulic oil flows toward piston 3 two ends, meets with hydraulic oil by throttling groove 4, further reduces flow velocity, thereby reaches gap sealed effect.So just can seal ring be set for piston 2.
And when being full of hydraulic coupling oil in the circular groove 5, piston 2 is in cylinder body 1 center all the time, has played the effect of centering.Piston 2 does not contact cylinder body 1 inwall, and piston 2 relies on the hydraulic pressure oil film to support with cylinder body 1 inwall, does not need extra support guide ring.
Owing to do not need seal ring and support guide ring, make that piston 2 slip resistance are extremely low, it is all very steady to start operation, and nothing is creeped, jitter phenomenon.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. a clearance seal formula oil cylinder comprises the piston in cylinder body, the cylinder body and the piston rod that is connected with piston, and it is characterized in that: described piston is the little fusiformis broad in the middle in two, and piston edge and inboard wall of cylinder block form the throttling groove of ring taper; Have circular groove along the piston circumference between two ring tapered joint chutes; Described circular groove is communicated with by the big chamber of the hole on the piston rod and oil cylinder.
2. clearance seal formula oil cylinder according to claim 1 is characterized in that: described circular groove is former and later two.
3. clearance seal formula oil cylinder according to claim 2 is characterized in that: also comprise the intermediate annular groove between two circular grooves.
4. clearance seal formula oil cylinder according to claim 1, it is characterized in that: the hole on the described piston rod is dug along the piston rod axle center; Also comprise the one-level circular groove on the piston rod anchor ring and the one-level intercommunicating pore of radially digging along piston rod, described one-level intercommunicating pore is communicated with the one-level circular groove with the hole; Along the piston radial cutting secondary intercommunicating pore is arranged, described circular groove relies on the secondary intercommunicating pore to be communicated with the one-level circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320183329 CN203176053U (en) | 2013-04-12 | 2013-04-12 | Gap-sealed oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320183329 CN203176053U (en) | 2013-04-12 | 2013-04-12 | Gap-sealed oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176053U true CN203176053U (en) | 2013-09-04 |
Family
ID=49072756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320183329 Expired - Fee Related CN203176053U (en) | 2013-04-12 | 2013-04-12 | Gap-sealed oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176053U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006023A (en) * | 2014-06-06 | 2014-08-27 | 徐州徐工液压件有限公司 | Clearance seal plunger type cylinder |
| CN104564901A (en) * | 2015-01-27 | 2015-04-29 | 武汉科技大学 | Low-friction hydraulic cylinder based on mini-type round pits |
| CN112762051A (en) * | 2021-02-05 | 2021-05-07 | 徐州徐工液压件有限公司 | Pressure leading-in type piston structure |
| CN113790191A (en) * | 2021-10-29 | 2021-12-14 | 江苏军宏机械有限公司 | High-frequency oil cylinder |
-
2013
- 2013-04-12 CN CN 201320183329 patent/CN203176053U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006023A (en) * | 2014-06-06 | 2014-08-27 | 徐州徐工液压件有限公司 | Clearance seal plunger type cylinder |
| CN104564901A (en) * | 2015-01-27 | 2015-04-29 | 武汉科技大学 | Low-friction hydraulic cylinder based on mini-type round pits |
| CN104564901B (en) * | 2015-01-27 | 2016-08-24 | 武汉科技大学 | A kind of low friction hydraulic cylinder based on miniature round pool |
| CN112762051A (en) * | 2021-02-05 | 2021-05-07 | 徐州徐工液压件有限公司 | Pressure leading-in type piston structure |
| CN113790191A (en) * | 2021-10-29 | 2021-12-14 | 江苏军宏机械有限公司 | High-frequency oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20210412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |