CN203770288U - Pneumatic moving barrel - Google Patents
Pneumatic moving barrel Download PDFInfo
- Publication number
- CN203770288U CN203770288U CN201420113098.7U CN201420113098U CN203770288U CN 203770288 U CN203770288 U CN 203770288U CN 201420113098 U CN201420113098 U CN 201420113098U CN 203770288 U CN203770288 U CN 203770288U
- Authority
- CN
- China
- Prior art keywords
- buffer
- mounting hole
- spacer
- piston rod
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000872 buffer Substances 0.000 claims abstract description 50
- 125000006850 spacer group Chemical group 0.000 claims abstract description 41
- 238000013016 damping Methods 0.000 claims description 13
- 230000013011 mating Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 9
- 238000013022 venting Methods 0.000 abstract 3
- 229920001971 elastomer Polymers 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a pneumatic moving barrel. The pneumatic moving barrel is characterized in that a mounting hole is axially formed in the front end of a piston rod along the piston rod; a buffering device comprises a spacer bush, a buffer, and a spring which are mounted in the mounting hole along the direction from the opening end to the bottom end of the mounting hole in sequence; one end of the spring is connected with the bottom end of the mounting hole and while the other end of the spring is connected with the buffer; the spacer bush is fixed into the mounting hole through a connecting mechanism; the spacer bush and the buffer are respectively axially provided with a spacer bush venting hole and a buffer venting hole along the piston rod; a piston rod venting hole connected into a cylinder body is formed in the inner wall of another mounting hole corresponding to the spring. The pneumatic moving barrel has the advantages that the structure is simple and compact, the buffering performance of buffering an expanding-shrinking moving barrel in a traditional unmanned machine is improved; in addition, the mounting and dismounting are convenient to carry out, and the weight index of the whole expanding-shrinking moving barrel is reduced.
Description
Technical field
The utility model relates to a kind of pneumatic cylinders.
Background technique
Pressurized strut is functor important in unmanned plane undercarriage, and is used for gas recent years as power source, but the impact of pressurized gas at the bottom of to pressurized strut cylinder is quite large, and therefore the quality of pressurized strut shock-absorbing capacity directly affects stable performance and the safety of aircraft.Pressurized strut structure is generally made up of urceolus, piston rod, piston, end cap, damping device etc., and the buffering form of pressurized strut mainly contains increases by two kinds of rubber buffer and hydraulic pressure shock absorbing devices.
The typical structure of rubber pad buffering is that product and the piston rod that rubber is made is pasted together, promote piston movement to end of travel in pressurized gas enter cylinder time, extruding rubber parts, because rubber parts belongs to elastomer, the energy impacting is absorbed by rubber pad, has played the effect of buffering.The major defect of rubber pad buffering is: the test of violent impact force and the combination force of the heat of generation to rubber pad and piston is quite harsh, and in the course of time, rubber pad easily comes off or be aging; When the piston of heavily loaded high-speed motion is under the effect of buffer rubber gasket pad, after kicking motion is fallen cylinder head, there is the power of motion round about.In the time that piston moves round about, exhaust cavity originally becomes air-inlet cavity.Make pressurized strut form the state of pendulum shake, be latched in impact on latch mechanism reliable; In the time adopting this kind of structure, the position of the exhaust port of rodless cavity is not generally fine layout, has aperture on urceolus or on piston rod, connects with rod chamber, has reduced the intensity of urceolus or piston rod, has reduced the reliability of pressurized strut.
The typical structure of hydraulic pressure shock absorbing device is by the Sealing on piston and piston, Yu You chamber, left chamber to be separated, and is generally provided with throttle orifice at right-hand member, and its throttling pore buffer function is that the throttling pore by being arranged on cylinder sleeve realizes.On the piston of general cylinder, be provided with a boss structure, when piston move right enter cushion stroke before fluid never throttling hydraulic fluid port flow out, in the time continuing to move into buffer structure chamber to left end, boss enters in the groove of end cap, in the oilhole passage of never throttling of the fluid in back pressure cavity, freely flow out and shut, forcing the fluid in back pressure cavity to be discharged from an adjustable throttling pore.Because the fluid in back pressure cavity can think incompressible, resistance is very large, and runner is hindered, and pressure raises, and the pressure-acting in back pressure cavity, at piston right-hand member, stops piston to continue motion, has absorbed the kinetic energy of piston, and the inertia of piston is cushioned.In the time need at the uniform velocity cushioning, make the little number of perforations of participating in throttling strengthen and reduce with buffer displacement, thereby reach at the uniform velocity buffer function.The main deficiency of hydraulic pressure shock absorbing device is: require harsher in the situation that, to bother because the throttling of left end arranges structural design in physical dimension or quality index, be generally difficult to meet structural requirement; Generally, in order to reach good cushioning effect, can add fluid to carry out damping at right-hand member, in whole system, will have two media, and need be designed with the accumulator that is equivalent to store hydraulic medium, more difficult on the control to whole system requires.
Summary of the invention
The purpose of this utility model is, for the deficiencies in the prior art, provides a kind of pneumatic cylinders, and good buffer effect is simple in structure.
The technical solution of the utility model is, a kind of pneumatic cylinders, comprise piston rod and damping device in cylinder body, cylinder body, the front end of cylinder body is provided with the inlet hole passing in cylinder body, it is characterized in that, described piston rod front end edge piston rod is axially arranged with mounting hole, described damping device comprises according to mounting hole opening end to mounting hole bottom direction and is arranged in turn spacer, buffer and the spring in mounting hole, one end of spring is connected with the bottom of mounting hole, and the other end of spring is connected with buffer, spacer is fixed in mounting hole by bindiny mechanism; Described spacer and buffer are along piston rod to being respectively equipped with spacer vent and buffer vent, and the mounting hole inwall corresponding with spring is provided with the piston rod vent leading in cylinder body.
The rear end periphery of spacer is provided with aprons slot, and in aprons slot, seal ring is installed, and can seal to spacer.
Buffer is half hollow cylindrical, and the front end of buffer is the solid end face corresponding with spacer rear end, and described buffer vent is the vent slot being located on buffer outer peripheral surface.
The center of buffer is provided with damping hole.
The front-end face radius of spacer is greater than spacer ear end face radius, and the width of spring is less than the radius of a circle of buffer.
Described piston rod mounting hole is the shoulder hole mating with the size of spacer, buffer, spring respectively.
Described bindiny mechanism is located at the outside thread of spacer periphery, the internal thread that be located at mounting hole inwall corresponding with outside thread, after buffer and Returnning spring are installed, then spacer is screwed in mounting hole, buffer and Returnning spring can be encapsulated in mounting hole.
Working principle of the present utility model is: pressurized gas in inlet hole enters mounting hole, pressurized gas promote spacer, piston rod vent from vent slot and the piston rod of the spacer vent of spacer, buffer enters in cylinder body, starting stage mounting hole internal pressure is high, it in cylinder body, is a standard atmospheric pressure, mounting hole inner high voltage gas will overcome spring force pushes buffer open, and pressurized gas enter cylinder body.
In the time that pressurized gas continue to enter cylinder body, cylinder interior pressure constantly raises, because also there is acceleration in piston rod, when in cylinder body with mounting hole in thrust when suitable, due to the existence of spring force, the front-end face of buffer and the terminal surface of spacer, cushion rubber stop rod chamber gas to flow back to rodless cavity jointly, and piston rod continue move to cylinder body end, now cushioning effect start effect.
In the time that cylinder body internal air pressure is increased to certain value, the speed of piston rod significantly slows down, and can only flow out from the damping hole of buffer, because of very little of damping hole, the pressurized gas in cylinder body can not be discharged timely, in the time arriving cylinder bottom, movement velocity is very slow, reaches the function of buffering.
The utility model is simple and compact for structure, has improved the shock-absorbing capacity of traditional unmanned plane with buffering retractable actuating cylinder, and easy installation and removal, has reduced the weight indicator of whole retractable actuating cylinder simultaneously.
Brief description of the drawings
Fig. 1 is a kind of embodiment's of the utility model structural representation;
Fig. 2 is the structural representation of buffer in Fig. 1;
Fig. 3 is the structural representation of A-A face in Fig. 2;
Fig. 4 is the structural representation of spacer in Fig. 1;
Fig. 5 is the structural representation of B-B face in Fig. 4;
Fig. 6 is the structural representation of piston rod in Fig. 1;
Fig. 7 is the structural representation of C-C face in Fig. 6.
Embodiment
As shown in Figure 1, a kind of pneumatic cylinders, comprise cylinder body 2, piston rod 3 and damping device in cylinder body 2, the front end of cylinder body 2 is provided with the inlet hole 15 passing in cylinder body 2, as Fig. 6, shown in Fig. 7, piston rod 3 front end edge piston rods 3 are axially arranged with mounting hole 16, described damping device comprises according to mounting hole 16 opening ends to mounting hole 16 bottom directions and is arranged in turn the spacer 4 in mounting hole 16, buffer 6 and spring 7, one end of spring 7 is connected with the bottom of mounting hole 16, and the other end of spring 7 is connected with buffer 6, spacer 4 is fixed in mounting hole 16 by bindiny mechanism, described spacer 4 is axially respectively equipped with spacer vent 13 and buffer vent 8 with buffer 6 along piston rod 3, and mounting hole 16 inwalls corresponding with spring 7 are provided with the piston rod vent 14 leading in cylinder body 2.
As shown in Figure 4, Figure 5, the rear end periphery of spacer 4 is provided with aprons slot 11, and at the interior installation seal ring 5 of aprons slot 11.
As shown in Figure 2 and Figure 3, buffer 6 is half hollow cylindrical, and the front end of buffer 6 is the solid end face corresponding with spacer 4 rear ends, and described buffer vent 8 is for being located at the vent slot on buffer 6 outer peripheral surfaces; The center of buffer 6 is provided with damping hole 9.
The front-end face radius of spacer 4 is greater than spacer 4 ear end face radiuses, and the width of spring 7 is less than the radius of a circle of buffer 6.
As shown in Figure 7, piston rod mounting hole 16 is the shoulder hole mating with the size of spacer 4, buffer 6, spring 7 respectively.
Bindiny mechanism is located at the outside thread of spacer 4 peripheries, the internal thread that be located at mounting hole 16 inwalls corresponding with outside thread.
Claims (8)
1. a pneumatic cylinders, comprise cylinder body (2), piston rod (3) and damping device in cylinder body (2), the front end of cylinder body (2) is provided with the inlet hole (15) passing in cylinder body (2), it is characterized in that, described piston rod (3) front end edge piston rod (3) is axially arranged with mounting hole (16), described damping device comprises according to mounting hole (16) opening end to mounting hole (16) bottom direction and is arranged in turn the spacer (4) in mounting hole (16), buffer (6) and spring (7), one end of spring (7) is connected with the bottom of mounting hole (16), and the other end of spring (7) is connected with buffer (6), spacer (4) is fixed in mounting hole (16) by bindiny mechanism, described spacer (4) is axially respectively equipped with spacer vent (13) and buffer vent (8) with buffer (6) along piston rod (3), and mounting hole (16) inwall corresponding with spring (7) is provided with the piston rod vent (14) leading in cylinder body (2).
2. pneumatic cylinders according to claim 1, is characterized in that, the rear end periphery of described spacer (4) is provided with aprons slot (11), and in aprons slot (11), seal ring (5) is installed.
3. according to pneumatic cylinders described in claim 1 or 2, it is characterized in that, described buffer (6) is half hollow cylindrical, and the front end of buffer (6) is the solid end face corresponding with spacer (4) rear end, and described buffer vent (8) is for being located at the vent slot on buffer (6) outer peripheral surface.
4. pneumatic cylinders according to claim 3, is characterized in that, the center of buffer (6) is provided with damping hole (9).
5. according to pneumatic cylinders described in claim 1 or 2, it is characterized in that, the front-end face radius of described spacer (4) is greater than spacer (4) ear end face radius.
6. pneumatic cylinders according to claim 5, is characterized in that, the width of described spring (7) is less than the radius of a circle of buffer (6).
7. according to pneumatic cylinders described in claim 1 or 2, it is characterized in that, described piston rod mounting hole (16) is the shoulder hole mating with the size of spacer (4), buffer (6), spring (7) respectively.
8. according to pneumatic cylinders described in claim 1 or 2, it is characterized in that, described bindiny mechanism is for being located at the outside thread of spacer (4) periphery, the internal thread that be located at mounting hole (16) inwall corresponding with outside thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113098.7U CN203770288U (en) | 2014-03-13 | 2014-03-13 | Pneumatic moving barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113098.7U CN203770288U (en) | 2014-03-13 | 2014-03-13 | Pneumatic moving barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770288U true CN203770288U (en) | 2014-08-13 |
Family
ID=51287483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420113098.7U Expired - Lifetime CN203770288U (en) | 2014-03-13 | 2014-03-13 | Pneumatic moving barrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770288U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930015A (en) * | 2015-05-13 | 2015-09-23 | 中航飞机起落架有限责任公司 | Oil gas type load reduction pneumatic actuator cylinder and load reduction method thereof |
| CN108612797A (en) * | 2018-07-13 | 2018-10-02 | 佛山市远阳五金制品有限公司 | A kind of hydraulic damper |
| CN110539883A (en) * | 2019-07-23 | 2019-12-06 | 北京精密机电控制设备研究所 | Undercarriage receive and releases executor |
-
2014
- 2014-03-13 CN CN201420113098.7U patent/CN203770288U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930015A (en) * | 2015-05-13 | 2015-09-23 | 中航飞机起落架有限责任公司 | Oil gas type load reduction pneumatic actuator cylinder and load reduction method thereof |
| CN108612797A (en) * | 2018-07-13 | 2018-10-02 | 佛山市远阳五金制品有限公司 | A kind of hydraulic damper |
| CN110539883A (en) * | 2019-07-23 | 2019-12-06 | 北京精密机电控制设备研究所 | Undercarriage receive and releases executor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
|
| CX01 | Expiry of patent term |