CN105201959A - Pneumatic cylinder - Google Patents
Pneumatic cylinder Download PDFInfo
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- CN105201959A CN105201959A CN201510532356.4A CN201510532356A CN105201959A CN 105201959 A CN105201959 A CN 105201959A CN 201510532356 A CN201510532356 A CN 201510532356A CN 105201959 A CN105201959 A CN 105201959A
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- piston
- cylinder body
- linear actuator
- pneumatic linear
- damping device
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Abstract
The invention discloses a pneumatic cylinder, belonging to the field of pneumatic mechanical equipment. The pneumatic cylinder comprises a cylinder body, a piston rod and a piston, wherein the piston rod is arranged in the cylinder body; the piston is fixedly connected with the piston rod; the piston is provided with a buffer piston; a buffer unit is arranged in the cylinder body and provided with a buffer channel matched with the buffer piston; and when the pneumatic cylinder is in use, the buffer piston is matched with the buffer channel to reduce the impact of the piston on the cylinder body. The technical scheme disclosed by the invention has the following advantages: when the piston approaches the stroke tail end, the pneumatic cylinder disclosed by the invention can enter the main exhaust hole through the buffer piston to block the main exhaust channel, so that the residual gas in the exhaust chamber can only be discharged through the throttling orifice to form unsmooth exhaust, and thus, the piston moves slower and smoothly approaches the end cover without impact, thereby implementing the buffer function and further reducing the impact of the piston on the cylinder body.
Description
Technical field
The present invention relates to pneumatic machinery apparatus field, particularly pneumatic linear actuator.
Background technique
Pneumatic linear actuator is the important pneumatic apparatus of one in pressure system, and general pneumatic linear actuator is made up of cylinder body, piston, piston rod, front cover, rear end cover and Sealing.Pneumatic linear actuator at work, often due to the reason of the aspects such as the motion of self and the pressure surge of pressure system self, pneumatic linear actuator is caused to produce temporary impact phenomenon at work, often cause when this impact is serious the damage of pneumatic element or pneumatic system work abnormal, affect greatly normal service life and the precision of oil hydraulic cylinder.
At present, although existing buffering pneumatic linear actuator is structurally not quite similar, but complicated structure, the seal point in cylinder body is more, easily produces the defect of leaking, simultaneously, its cushioning effect is determined by the fixed structure of pneumatic linear actuator, cannot do corresponding adjustment, in addition according to work concrete condition, owing to there is complex structure, also there is the defect that cost is higher in existing buffering pneumatic linear actuator.
Summary of the invention
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the invention provides a kind of pneumatic linear actuator.Described technological scheme is as follows:
An object of the present invention is to provide a kind of pneumatic linear actuator.
According to an aspect of the present invention, provide a kind of pneumatic linear actuator, described pneumatic linear actuator comprises cylinder body, piston rod and piston, described piston rod is arranged in described cylinder body, described piston is fixedly connected with described piston rod, and described piston is provided with and damper piston, in described cylinder body, arrange damping device, described damping device is provided with the buffer channel matched with described damper piston
In use, coordinate to reduce the impact of described piston to described cylinder body with described buffer channel by described damper piston.
Further, described buffer channel runs through described damping device along the longitudinal direction of described cylinder body, and one end of described buffer channel is communicated with the gas port of described pneumatic linear actuator, the other end of described buffer channel and the inner space of described cylinder body, described damper piston is arranged on the surface of described piston along the longitudinal direction of described cylinder body
In use, open by described damper piston with coordinating of described buffer channel or close described gas port, thus realizing the buffering of described piston.
Particularly, described cylinder body comprises front cover and rear end cover, described front cover and rear end cover are separately positioned on the opposite end of described cylinder body, described gas port is arranged on described front cover, and described piston rod along described cylinder body longitudinal direction arrange and extend to after running through described front cover outside described cylinder body, described damper piston and described piston rod are set parallel to each other.
Particularly, described damping device is arranged between described piston and described front cover, and described damper piston is arranged on the side of close described damping device of described piston.
Further, described damping device is also provided with the circular hole passed through for described piston.
Further, described damping device is also provided with throttle orifice, one end of described throttle orifice is communicated with described buffer channel, the other end of described throttle orifice and the inner space of described cylinder body.
Further, connecting passage is provided with between described throttle orifice and described buffer channel, described connecting passage is arranged along the direction perpendicular to the longitudinal direction of described piston rod, and one end of described connecting passage is communicated with described throttle orifice, and the other end of described connecting passage is communicated with described buffer channel.
Further, described throttle orifice place is provided with the throttle valve for throttling.
Particularly, described damper piston is buffer plunger.
Particularly, described damping device and described front cover are formed in one part or be respectively two independent parts.
The beneficial effect of technological scheme provided by the invention is: pneumatic linear actuator provided by the invention can at piston movement to during close to end of travel, main exhaust hole can be entered by damper piston, thus block main exhaust passageway, make the residual gas in exhaust cavity, can only discharge from throttle orifice, form exhaust smooth, and then the movement velocity of piston be slowed down and reposefully without the close end cap of shock, realize buffer function, to reduce the impact of piston to cylinder body.
Accompanying drawing explanation
Fig. 1 is the partial structurtes schematic diagram of pneumatic linear actuator according to an embodiment of the invention.
Wherein, 100 pneumatic linear actuators, 10 cylinder bodies, 11 front covers, 111 gas port, 20 piston rods, 30 pistons, 31 damper pistons, 50 damping devices, 51 buffer channels, 52 throttle orifices, 53 attachment holes.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
See Fig. 1, it illustrates pneumatic linear actuator 100 according to an embodiment of the invention.Pneumatic linear actuator 100 comprises cylinder body 10, piston rod 20 and piston 30.Piston rod 20 is arranged in cylinder body 10, and piston 30 is fixedly connected with piston rod 20, piston 30 is provided with and damper piston 31, arranges damping device 50 in cylinder body 10, damping device 50 is provided with the buffer channel 51 matched with damper piston 31.In use, coordinate with buffer channel 51 impact reducing piston 30 pairs of cylinder bodies 10 by damper piston 31.
Particularly, cylinder body 10 comprises front cover 11 and rear end cover (not shown).Front cover 11 and rear end cover are separately positioned on the opposite end of cylinder body 10, and gas port 111 is arranged on front cover 11.Piston rod 20 arranges along the longitudinal direction of cylinder body 10 and extends to after running through front cover 11 outside cylinder body 10, and damper piston 31 and piston rod 20 are set parallel to each other.
Damping device 50 is arranged between piston 30 and front cover 11, and is connected with the internal surface of cylinder body 10 is sealed against one another.In an example of the present invention, damping device 50 is also provided with the circular hole (not shown) passed through for piston 20, this circular hole and piston rod 20 compact siro spinning technology each other, make piston rod 20 when end cap 11 moves drive piston 30 forward by such design, damper piston 31 is while coordinating with confining gas mouth 111 with buffer channel 51, make to form sealed section between piston rod 20 and circular hole, thus realize being vented not smooth to gas port 111 and realizing buffer function.Certain those skilled in the art can understand, the circular hole that damping device is arranged can be set to other shape, such as square, oval etc., as long as can be fitted to each other with piston rod 20 form sealed section.
In another example of the present invention, damping device 50 and front cover 11 are formed in one part or be respectively two independent parts.That is, damping device 50 can be the part in front cover 11, also can be independent parts, such as when damping device 50 is independent parts, damping device 50 is arranged in the inner chamber of cylinder body 10, and with the internal surface fixed seal connection of cylinder body 10, make the buffer channel 51 changing device 50 into be communicated with gas port 111 simultaneously.When damping device 50 and front cover 11 are formed in one part, the buffer channel 51 in damping device 50 can have the gas channel of gas port 111.Certain those skilled in the art can correspondingly select as required.
Damper piston 31 is arranged on the surface of close damping device 50 of piston 30, on the left surface of the piston 30 namely in the page as shown in Figure 1.Buffer channel 51 runs through damping device 50 along the longitudinal direction of cylinder body 10, and one end of buffer channel 51 is communicated with the gas port 111 of pneumatic linear actuator 100, the other end of buffer channel 51 and the inner space of cylinder body 10.
In an also example of the present invention, damper piston 31 is buffer plunger, certainly it will be appreciated by those skilled in the art that, damper piston 31 can also be set to other shapes, such as bulks etc., as long as can realize matching with buffer channel 51, thus reduce the impact force of piston 30.Damper piston 31 is arranged on the surface of piston 30 along the longitudinal direction of cylinder body 10.In use, by damper piston 31 and buffer channel 51 coordinate open or confining gas mouth 111, thus realize the buffering of piston 20.
Damping device 50 is also provided with throttle orifice 52.One end of throttle orifice 52 is communicated with buffer channel 51, the other end of throttle orifice 52 and the inner space of cylinder body 10.In an example of the present invention, throttle orifice 52 place is provided with the throttle valve (not shown) for throttling.In another example of the present invention, between throttle orifice 52 and buffer channel 51, be also provided with connecting passage 53.Connecting passage 53 is arranged (left and right directions as shown in Fig. 1 page) along the direction of the longitudinal direction perpendicular to piston rod 20, and one end of connecting passage 53 is communicated with throttle orifice 52, and the other end of connecting passage 53 is communicated with buffer channel 51.
The concrete structure of pneumatic linear actuator 100 is further illustrated below by the working principle describing pneumatic linear actuator 100 in detail.
When piston rod 20 drives piston 30 end cap 11 moves and moves to close to end of travel forward along the longitudinal direction of cylinder body 10, buffer plunger (i.e. damper piston 31) enters buffer channel 51, and block main exhaust passageway (i.e. buffer channel 51 and gas port 111), now pneumatic linear actuator 100 enters cushion stroke.Due to the effect of inertia, damper piston 31 is moved on along with piston 30, and the residual gas in the inner chamber of now cylinder body 10 can only enter throttle orifice 52 by connecting passage 53, and be expelled to the inner chamber of cylinder body 10 from throttle orifice 52, in the inner chamber of cylinder body 10, form exhaust thus not smooth, make the formation active force of gas on the surface of the close front cover 11 of piston 30.And the gas in exhaust cavity in (i.e. the inner chamber of cylinder body) is owing to being subject to the compression of piston 30, pressure in the inner chamber of cylinder body is raised, thus the active force acted on the surface of the close front cover 11 of piston 30 increases gradually, and then the movement velocity of piston 30 is slowed down, then achieve buffer function.Buffering pneumatic linear actuator is actually and utilizes air to be compressed, and absorbs the kinetic energy of moving element, reaches buffering object.
When the gas port 111 by pneumatic linear actuator 100 is pressed into gas in cylinder body 10, gas is pressurizeed to damper piston 31 by buffer channel 51, now the pressure of gas has acted on piston 30 by damper piston 31, piston rod 20 is made to drive piston 30 to move to the rear end cover of pneumatic linear actuator 100, thus make damper piston 31 be taken away buffer channel 51 by piston 30, and then gas is entered in the inner chamber of cylinder body 10 by gas port 111 and buffer channel 51.
The beneficial effect of technological scheme provided by the invention is: pneumatic linear actuator provided by the invention can at piston movement to during close to end of travel, main exhaust hole can be entered by damper piston, thus block main exhaust passageway, make the residual gas in exhaust cavity, can only discharge from throttle orifice, form exhaust smooth, and then the movement velocity of piston be slowed down and reposefully without the close end cap of shock, realize buffer function, to reduce the impact of piston to cylinder body.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a pneumatic linear actuator, is characterized in that,
Described pneumatic linear actuator comprises cylinder body, piston rod and piston, described piston rod is arranged in described cylinder body, described piston is fixedly connected with described piston rod, described piston is provided with and damper piston, in described cylinder body, damping device is set, described damping device is provided with the buffer channel matched with described damper piston
In use, coordinate to reduce the impact of described piston to described cylinder body with described buffer channel by described damper piston.
2. pneumatic linear actuator according to claim 1, is characterized in that,
Described buffer channel runs through described damping device along the longitudinal direction of described cylinder body, and one end of described buffer channel is communicated with the gas port of described pneumatic linear actuator, the other end of described buffer channel and the inner space of described cylinder body, described damper piston is arranged on the surface of described piston along the longitudinal direction of described cylinder body
In use, open by described damper piston with coordinating of described buffer channel or close described gas port, thus realizing the buffering of described piston.
3. pneumatic linear actuator according to claim 2, is characterized in that,
Described cylinder body comprises front cover and rear end cover, described front cover and rear end cover are separately positioned on the opposite end of described cylinder body, described gas port is arranged on described front cover, and described piston rod along described cylinder body longitudinal direction arrange and extend to after running through described front cover outside described cylinder body, described damper piston and described piston rod are set parallel to each other.
4. pneumatic linear actuator according to claim 3, is characterized in that,
Described damping device is arranged between described piston and described front cover, and described damper piston is arranged on the side of close described damping device of described piston.
5. pneumatic linear actuator according to claim 4, is characterized in that,
Described damping device is also provided with the circular hole passed through for described piston.
6. the pneumatic linear actuator according to any one of claim 1-5, is characterized in that,
Described damping device is also provided with throttle orifice, and one end of described throttle orifice is communicated with described buffer channel, the other end of described throttle orifice and the inner space of described cylinder body.
7. pneumatic linear actuator according to claim 6, is characterized in that,
Connecting passage is provided with between described throttle orifice and described buffer channel, described connecting passage is arranged along the direction perpendicular to the longitudinal direction of described piston rod, one end of described connecting passage is communicated with described throttle orifice, and the other end of described connecting passage is communicated with described buffer channel.
8. pneumatic linear actuator according to claim 7, is characterized in that,
Described throttle orifice place is provided with the throttle valve for throttling.
9. pneumatic linear actuator according to claim 8, is characterized in that,
Described damper piston is buffer plunger.
10. pneumatic linear actuator according to claim 9, is characterized in that,
Described damping device and described front cover are formed in one part or be respectively two independent parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532356.4A CN105201959B (en) | 2015-08-24 | 2015-08-24 | Pneumatic linear actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532356.4A CN105201959B (en) | 2015-08-24 | 2015-08-24 | Pneumatic linear actuator |
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| Publication Number | Publication Date |
|---|---|
| CN105201959A true CN105201959A (en) | 2015-12-30 |
| CN105201959B CN105201959B (en) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510532356.4A Active CN105201959B (en) | 2015-08-24 | 2015-08-24 | Pneumatic linear actuator |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2906583A1 (en) * | 1978-02-22 | 1979-08-30 | Armstrong Patents Co Ltd | TELESCOPIC GAS SPRING |
| EP0735280A2 (en) * | 1995-03-29 | 1996-10-02 | KOREA INSTITUTE OF MACHINERY & METALS | Pneumatic cylinder |
| CN102345652A (en) * | 2010-07-29 | 2012-02-08 | 蒋国泉 | Buffering type cylinder |
| CN202718944U (en) * | 2012-03-14 | 2013-02-06 | 常州市顺景油缸有限公司 | Oil cylinder of excavator with buffer function |
| CN104373417A (en) * | 2014-10-28 | 2015-02-25 | 奉化鑫益气动工程有限公司 | Dust removal air cylinder |
-
2015
- 2015-08-24 CN CN201510532356.4A patent/CN105201959B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2906583A1 (en) * | 1978-02-22 | 1979-08-30 | Armstrong Patents Co Ltd | TELESCOPIC GAS SPRING |
| EP0735280A2 (en) * | 1995-03-29 | 1996-10-02 | KOREA INSTITUTE OF MACHINERY & METALS | Pneumatic cylinder |
| CN102345652A (en) * | 2010-07-29 | 2012-02-08 | 蒋国泉 | Buffering type cylinder |
| CN202718944U (en) * | 2012-03-14 | 2013-02-06 | 常州市顺景油缸有限公司 | Oil cylinder of excavator with buffer function |
| CN104373417A (en) * | 2014-10-28 | 2015-02-25 | 奉化鑫益气动工程有限公司 | Dust removal air cylinder |
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| Publication number | Publication date |
|---|---|
| CN105201959B (en) | 2017-12-12 |
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Address after: 241000 Anshan South Road, Wuhu economic and Technological Development Zone, Anhui Patentee after: Wuhu male lion Automobile Technology Co., Ltd. Address before: 241000 Hengshan Road 35, Wuhu economic and Technological Development Zone, Anhui Patentee before: WUHU RESEARCH INSTITUTE OF INSTITUTE TECHNOLOGY OF AUTOMOBILE CO., LTD. |
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