CN205315819U - Piston type cylinder - Google Patents
Piston type cylinder Download PDFInfo
- Publication number
- CN205315819U CN205315819U CN201521055786.3U CN201521055786U CN205315819U CN 205315819 U CN205315819 U CN 205315819U CN 201521055786 U CN201521055786 U CN 201521055786U CN 205315819 U CN205315819 U CN 205315819U
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- CN
- China
- Prior art keywords
- cylinder
- movable part
- valve rod
- lining
- piston type
- 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.)
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Abstract
The utility model discloses a piston type cylinder, it includes the cylinder body, is fixed in the cylinder cap of the lower extreme of cylinder body with locate bush in the cylinder body, the bush with the inner chamber that the cylinder cap encloses is equipped with the region of admitting air, it is equipped with the valve rod in the region to admit air, be equipped with on the valve rod and follow the valve rod is in the movable part of the inner chamber removal that the bush encloses, the movable part includes the flexion, the flexion encircles the marginal distribution of movable part, the flexion with be equipped with seal part between the bush, seal part includes this somatic part, this somatic part butt in the flexion, still be equipped with flank portion on this somatic part, flank portion butt in the bush, the slant of flank portion distributes down, this somatic part with form the concave part between the flank portion, the concave part communicate in the region of admitting air. The utility model discloses have good gas leakproofness, and seal part's wearing and tearing reduce greatly.
Description
Technical field
This utility model relates to a kind of piston type cylinder.
Background technology
Operated pneumatic valve drives piston motion in the axial direction to realize the folding of valve by valve rod, and the power resources of axially-movable are in cylinder. The air-tightness of cylinder plays vital effect for the performance of cylinder, and the selection of sealing ring is particularly critical.
In current most piston type cylinder on the market is O, easy to wear in the process of axially reciprocating, causes the leakage of gas, causes the decline of cylinder serviceability.
Utility model content
The technical problems to be solved in the utility model is that seal member is easy to wear, the defect of the poor air-tightness of cylinder in order to overcome prior art to exist, it is provided that a kind of piston type cylinder.
This utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of piston type cylinder, it includes a cylinder body, the cylinder cap and one of one lower end being fixed on described cylinder body is located at the lining in described cylinder body, the inner chamber that described lining and described cylinder cap surround is provided with an admittance area, a valve rod it is provided with in described admittance area, described valve rod is provided with a movable part moved with described valve rod at the inner chamber that described lining surrounds, it is characterized in that, described movable part includes a bending section, described bending section is around the marginal distribution of described movable part, a seal member it is provided with between described bending section and described lining, described seal member includes a body, described body is connected to described bending section, described body is additionally provided with a flank section, described flank section is connected to described lining, described flank section is distributed obliquely, a concave part is formed between described body and described flank section, described concave part is communicated in described admittance area.
It is preferred that described flank section and described body are formed in one. So, it is simple to the manufacturing of seal member.
It is preferred that the material of described body and described flank section is rubber. Elastomeric material cost is low, good seal performance.
It is preferred that be folded with a spring between the top of described movable part and described cylinder body.Spring can make the timely homing of movable part.
It is preferred that described valve rod is arranged in described movable part. So, there is advantage easy to assembly.
Positive progressive effect of the present utility model is in that: when admittance area air inlet, and its air pressure raises, and pressure directly acts on the flank section of seal member, makes flank section increase with lining contact stress, and laminating is tightr, and sealing property is relatively reliable. When admittance area stops air inlet, its air pressure is die-offed, and the flank section of seal member, no longer by intrinsic pressure effect, only produces only small contact pressure with seal with buss face, substantially reduces the abrasion of seal member.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model preferred embodiment.
Fig. 2 is the A-A cross-sectional schematic in Fig. 1.
Fig. 3 is the part B enlarged diagram in Fig. 2.
Detailed description of the invention
Name a preferred embodiment, and become apparent from intactly illustrating this utility model in conjunction with accompanying drawing.
Such as Fig. 1, shown in Fig. 2 and Fig. 3, a kind of piston type cylinder, it includes cylinder body 20, the cylinder cap 80 being fixed on the lower end of cylinder body 20 and the lining 10 being located in cylinder body 20, the inner chamber that lining 10 and cylinder cap 80 surround is provided with admittance area 30, valve rod 40 it is provided with in admittance area 30, valve rod 40 is provided with the movable part 50 moved with valve rod 40 at the inner chamber that lining 10 surrounds, movable part 50 includes bending section 51, bending section 51 is around the marginal distribution of movable part 50, seal member 60 it is provided with between bending section 51 and lining 10, seal member 60 includes body 61, body 61 is connected to bending section 51, body 61 is additionally provided with flank section 62, flank section 62 is connected to lining 10, flank section 62 is distributed obliquely, concave part 63 is formed between body 61 and flank section 62, concave part 63 is communicated in admittance area 30. flank section 62 and body 61 are formed in one, the material of body 61 and flank section 62 is rubber. spring 70 it is folded with between the top of movable part 50 and cylinder body 20. valve rod 40 is arranged in movable part 50.
When admittance area air inlet, the air pressure of the inner chamber that lining, movable part and cylinder cap surround raises, the interior intracavity that the thrust that movable part is produced by gas pressure surrounds at lining slides, seal member and lining contact internal walls pressure become big, flank section coordinates tightr with lining inwall, so that air-tightness is greatly improved. When admittance area stops air inlet, spring forces movable part moves axially downwards, and seal member moves downward along lining along with movable part. Now, admittance area internal gas pressure is die-offed, and the flank section of seal member, no longer by intrinsic pressure effect, only produces only small contact pressure with seal with buss face, substantially reduces the abrasion of seal member.
In a free state, the flank section external diameter of seal member is more than the internal diameter of lining, so, just has certain deformation after assembling. This deformation only occurs in the tip of flank section, and produces pressure at it with lining contact site, even if not applying thrust, flank section also can seal certain intrinsic pressure.
Additionally, the bending section of the body of seal member and movable part is suitable, so, the contact area of body and movable part increases, and operating position is more stable, thus the enhancing of anti-root wear resistance, increase the service life.
In description of the present utility model, it will be appreciated that, term " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.
Although the foregoing describing detailed description of the invention of the present utility model, it will be appreciated by those of skill in the art that this is merely illustrative of, protection domain of the present utility model is defined by the appended claims.Those skilled in the art is under the premise without departing substantially from principle of the present utility model and essence, it is possible to these embodiments are made various changes or modifications, but these change and amendment each falls within protection domain of the present utility model.
Claims (5)
1. a piston type cylinder, it includes a cylinder body, the cylinder cap and one of one lower end being fixed on described cylinder body is located at the lining in described cylinder body, the inner chamber that described lining and described cylinder cap surround is provided with an admittance area, a valve rod it is provided with in described admittance area, described valve rod is provided with a movable part moved with described valve rod at the inner chamber that described lining surrounds, it is characterized in that, described movable part includes a bending section, described bending section is around the marginal distribution of described movable part, a seal member it is provided with between described bending section and described lining, described seal member includes a body, described body is connected to described bending section, described body is additionally provided with a flank section, described flank section is connected to described lining, described flank section is distributed obliquely, a concave part is formed between described body and described flank section, described concave part is communicated in described admittance area.
2. piston type cylinder as claimed in claim 1, it is characterised in that described flank section and described body are formed in one.
3. piston type cylinder as claimed in claim 1, it is characterised in that the material of described body and described flank section is rubber.
4. piston type cylinder as claimed in claim 1, it is characterised in that be folded with a spring between the top of described movable part and described cylinder body.
5. piston type cylinder as claimed in claim 1, it is characterised in that described valve rod is arranged in described movable part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055786.3U CN205315819U (en) | 2015-12-16 | 2015-12-16 | Piston type cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521055786.3U CN205315819U (en) | 2015-12-16 | 2015-12-16 | Piston type cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205315819U true CN205315819U (en) | 2016-06-15 |
Family
ID=56185347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521055786.3U Active CN205315819U (en) | 2015-12-16 | 2015-12-16 | Piston type cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205315819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110914579A (en) * | 2017-07-24 | 2020-03-24 | Nok株式会社 | Valve stem seal |
-
2015
- 2015-12-16 CN CN201521055786.3U patent/CN205315819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110914579A (en) * | 2017-07-24 | 2020-03-24 | Nok株式会社 | Valve stem seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 201100 Shanghai city Minhang District Huaning road 2888 Lane 88 Building No. 28 Patentee after: Gaimi valve (China) Co. Ltd. Address before: 201100 Shanghai city Changning District Huaning road 2888 Lane 88 Building No. 28 Patentee before: Gaimi valve (Shanghai) Co., Ltd. |
|
| CP03 | Change of name, title or address |