CN203176047U - Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas - Google Patents
Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas Download PDFInfo
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- CN203176047U CN203176047U CN 201220749710 CN201220749710U CN203176047U CN 203176047 U CN203176047 U CN 203176047U CN 201220749710 CN201220749710 CN 201220749710 CN 201220749710 U CN201220749710 U CN 201220749710U CN 203176047 U CN203176047 U CN 203176047U
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Abstract
An air-suspending non-friction air cylinder provided with a spherical hinge and not affected by high-pressure gas comprises a cylinder barrel, a piston, a piston rod and the spherical hinge. The piston is fixedly connected with one end of the piston rod through the spherical hinge, an installing hole is formed in the other end of the piston rod, a base is installed at one end of the cylinder barrel, an end cover is arranged at the other end of the cylinder barrel, an air source inlet is formed in the base, the piston rod penetrates through the end cover, an air outlet is formed in a rod cavity of the cylinder barrel, orifices are evenly formed in the piston in the radial direction, a circle of grooves are formed in one side, close to a rodless cavity, of the outer cylinder surface of the piston, blind holes are drilled above the grooves in the radial direction, through holes are drilled in the direction from the piston wall to the rod cavity to form pressure releasing cavities, and the pressure releasing cavities are separated from the orifices. The effects on an air film from the high-pressure air flow and the low-pressure air flow are effectively avoided, and control precision is high.
Description
Technical field
The utility model relates to a kind of air supporting cylinder.
Background technique
Common cylinder adopts mechanical seal usually, has contact friction force between cylinder barrel and the piston.
Traditional low friction cylinder relies on and improves machining accuracy, adopts special low-friction material or grease lubrication to reduce friction, but has processing difficulties, cost height, difficult in maintenance and defective that the life-span is short; Perhaps by improving seal form, reduce frictional force, be applied to cylinder as the special sealing technique of German FESTO company's employing, adopt the one-way sealing circle, have very little resistance of taxing.Japan SMC company adopts ball guide sleeve technology and Gap Sealing Technology, should low friction cylinder aspect at the uniform velocity property, high low pressure friction, high speed and high frequency, all have breakthrough, yet there are some defectives too, such as to load sensitivity radially, complex structure, manufacturing difficulty are big, expensive.
For satisfying the requirement of aspects such as ultraprecise constant force output control, minute-pressure action control, the gas lubrication technology is realizing that zero friction cylinder is applied.Be that 201120080863.6 " a kind of nothing friction cylinder that has an air-bearing " just announced a kind of nothing friction cylinder according to the design of air supporting principle as number of patent application, leave minimum gap between cylinder barrel and the piston, the throttle orifice of even cloth is set at piston radial, piston rod by hollow and flexible pipe are the piston air feed in the cylinder, and connect by ball pivot and to make that not having the friction cylinder can bear certain radial load and seizure of piston not take place in cylinder.But the plenum system complexity by hollow piston rod and flexible pipe, assembling are loaded down with trivial details, easy care not, do not optimize there being the friction cylinder afterwards, pressurized air in employing cylinder self cavity volume is as oiling agent, gas is introduced in the gap, make piston in cylinder, be in complete state of suspension, piston do not contact each other with cylinder barrel, thereby eliminated the frictional force between the piston and cylinder barrel in the air cylinder structure.But, no matter adopt which kind of plenum system, owing to leave the gap between piston and the cylinder barrel, there is very big draught head between the hyperbaric chamber of cylinder and the low-pressure cavity, thereby between the gap, can form air pressure stream, directly influence the air pressure film that piston forms in the gap by throttle orifice, on the other hand, the prerequisite that air film forms is to have certain draught head in the gap, and raise near the gap air pressure of hyperbaric chamber one end, cause air-film thickness, pressure distribution inhomogeneous, stability, precision, the bearing capacity of this nothing friction cylinder all caused influence.
Summary of the invention
In order to overcome the existing high low pressure air-flow that does not have the friction cylinder to the deficiency that air film exerts an influence, control accuracy is lower, the utility model provides a kind of high low pressure air-flow of effectively avoiding that the gas suspension of the dribbling hinge that air film exerts an influence, control accuracy is higher is not had the friction cylinder.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of gas suspension that not influenced by pressurized gas of the hinge of dribbling does not have the friction cylinder, comprise cylinder barrel, piston, piston rod and spherical hinge, described piston is fixedlyed connected by spherical hinge with piston rod one end, the described piston rod the other end is established mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, described piston rod is worn end cap, the rod chamber of described cylinder barrel is provided with the air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove, isolate mutually between described pressure relief groove and the throttle orifice.
Further, described pressure relief groove groove is provided with gradient near rodless cavity one end.
Further again, a circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.
Or: at least two circle pressure relief grooves are distributed in the piston wall.
Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described mounting hole is in order to the tapped hole of spherical hinge to be installed.
Mentality of designing of the present utility model is: the end design at the close hyperbaric chamber of piston has pressure relief groove, to in pressure relief groove, be discharged to low-pressure cavity through certain crevice throttle damping decompression back from the gas stream that hyperbaric chamber enters piston and cylinder barrel gap, not influence the air film that throttle orifice forms on the piston; Adopt the pneumatic bearing sealing between piston rod and the cylinder sleeve, eliminated the frictional force between piston rod and the cylinder barrel.
The beneficial effects of the utility model are: effectively avoid the high low pressure air-flow to air film exert an influence, control accuracy is higher.
Description of drawings
Fig. 1 is that a kind of gas suspension that not influenced by pressurized gas of the hinge of dribbling does not have friction cylinder schematic representation;
Fig. 2 is the piston schematic representation;
Fig. 3 is Fig. 2 A-A view;
Fig. 4 is Fig. 2 C-C view;
Fig. 5 is gas flow schematic representation in the cylinder.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1 ~ Fig. 5, a kind of gas suspension that not influenced by pressurized gas of the hinge of dribbling does not have the friction cylinder, comprise cylinder barrel 4, piston 7, piston rod 2 and spherical hinge 6, described piston 7 is fixedlyed connected by spherical hinge 6 with piston rod 2 one ends, described piston rod 2 the other ends have the tapped hole 1 in order to spherical hinge to be installed, described cylinder barrel 4 one end mounting base 9, the other end of described cylinder barrel 4 is installed end cap 3, described base 9 is provided with gas source air inlet, described piston rod 2 is worn end cap, the rod chamber of cylinder barrel 4 is provided with air outlet 10, described piston 7 radially arranges uniform throttle orifice 13, and described outside piston cylinder is provided with a circle groove 11 near rodless cavity one side, radially beats blind hole from groove 11 tops, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove 12, isolate mutually between described pressure relief groove 12 and the throttle orifice 13.
Described pressure relief groove groove is provided with gradient near rodless cavity one end.One circle pressure relief groove is distributed in the piston wall, and a circle pressure relief groove contains at least two pressure relief grooves.Or: at least two circle pressure relief grooves are distributed in the piston wall.Described piston is provided with the uniform throttle orifice of at least two group radial direction.
Described rod chamber is low-pressure cavity 5, and rodless cavity is hyperbaric chamber 8.
In the present embodiment, there is minimum gap between described piston and cylinder, described base and cylinder barrel are terminal fixing, described cylinder barrel, base form hyperbaric chamber at an end of piston, described end cap is installed in the cylinder barrel end, and described air-bearing, cylinder barrel form low-pressure cavity at the piston the other end, on the low-pressure cavity cylinder barrel wall air outlet O are arranged, source of the gas enters hyperbaric chamber from cylinder air inlet P1, promotes the piston frictionless motion.
The piston rod two ends are connected with exterior part with piston by spherical hinge, make that not having the friction cylinder can bear certain radial load, avoids causing seizure of piston in cylinder because piston rod deflects.
The throttle orifice of even cloth is set on the described piston radial, and the quantity of throttle orifice can be arranged one or more groups; The outside piston cylinder has a circle groove near hyperbaric chamber one side design, radially beats blind hole from the groove top, gets through the hole again along piston wall to the low-pressure cavity direction and forms pressure relief groove, and one or more groups pressure relief groove is distributed in the piston wall, and does not communicate between the throttle orifice; In Fig. 2, nearly hyperbaric chamber one end of pressure relief groove groove becomes certain gradient, and therefore, the air-flow that enters piston and cylinder gap from hyperbaric chamber directly flow in the low-pressure cavity from pressure relief groove; Pressure relief groove also can be split into other form, can conveniently derive hyperbaric chamber and press people's air-flow to get final product; Gas in the hyperbaric chamber forms air film through throttle orifice between piston and cylinder gap, air film gas part flows directly into low-pressure cavity along piston and cylinder barrel gap, and remaining flows into low-pressure cavity through pressure relief groove.And do not influence air film between piston and cylinder barrel from the gas that hyperbaric chamber enters the gap, as Fig. 3.
Above-mentioned example is used for explaining the utility model, rather than the utility model is limited, and in the protection domain of spirit of the present utility model and claim, the utility model is made any modification and change, all falls into protection domain of the present utility model.
Claims (6)
1. the gas suspension that not influenced by pressurized gas of the hinge of dribbling does not have the friction cylinder, it is characterized in that: described gas suspension does not have the friction cylinder and comprises cylinder barrel, piston, piston rod and spherical hinge, described piston is fixedlyed connected by spherical hinge with piston rod one end, the described piston rod the other end is established mounting hole, described cylinder barrel one end mounting base, the other end of described cylinder barrel is installed end cap, described base is provided with gas source air inlet, described piston rod passes end cap, the rod chamber of described cylinder barrel is provided with the air outlet, described piston radial arranges uniform throttle orifice, described outside piston cylinder is provided with a circle groove near rodless cavity one side, radially beat blind hole from the groove top, get through the hole again along piston wall to the rod chamber direction and form pressure relief groove, isolate mutually between described pressure relief groove and the throttle orifice.
2. the gas suspension that not influenced by pressurized gas of dribbling hinge as claimed in claim 1 does not have the friction cylinder, it is characterized in that: described groove is provided with gradient near rodless cavity one end.
3. the gas suspension that not influenced by pressurized gas of dribbling hinge as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: a circle pressure relief groove is distributed in the piston wall.
4. the gas suspension that not influenced by pressurized gas of dribbling hinge as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: at least two circle pressure relief grooves are distributed in the piston wall.
5. the gas suspension that not influenced by pressurized gas of dribbling hinge as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: described piston is provided with the uniform throttle orifice of at least two group radial direction.
6. the gas suspension that not influenced by pressurized gas of dribbling hinge as claimed in claim 1 or 2 does not have the friction cylinder, it is characterized in that: described mounting hole is in order to the tapped hole of spherical hinge to be installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220749710 CN203176047U (en) | 2012-12-31 | 2012-12-31 | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220749710 CN203176047U (en) | 2012-12-31 | 2012-12-31 | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176047U true CN203176047U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220749710 Withdrawn - After Issue CN203176047U (en) | 2012-12-31 | 2012-12-31 | Air-suspending non-friction air cylinder provided with spherical hinge and not affected by high-pressure gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016442A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas |
-
2012
- 2012-12-31 CN CN 201220749710 patent/CN203176047U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016442A (en) * | 2012-12-31 | 2013-04-03 | 浙江工业大学 | Air suspension friction-free air cylinder provided with spherical hinge and uninfluenced by high pressure gas |
| CN103016442B (en) * | 2012-12-31 | 2015-12-30 | 浙江工业大学 | A kind of gas suspension do not affected by pressurized gas with spherical hinge is without friction cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20151230 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |