CN201531487U - Preposed cylinder plunger for preventing oil leakage - Google Patents
Preposed cylinder plunger for preventing oil leakage Download PDFInfo
- Publication number
- CN201531487U CN201531487U CN200920252562XU CN200920252562U CN201531487U CN 201531487 U CN201531487 U CN 201531487U CN 200920252562X U CN200920252562X U CN 200920252562XU CN 200920252562 U CN200920252562 U CN 200920252562U CN 201531487 U CN201531487 U CN 201531487U
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- plunger
- fixing device
- leakage
- oil
- plunger tube
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Abstract
The utility model discloses a preposed cylinder plunger for preventing oil leakage, which is used for multi-stage telescopic sleeve hydraulic oil cylinder and comprises a plunger tube, wherein the upper end of the plunger tube is welded with a plunger head; the pipe hole in the lower end of the plunger tube is installed with a plunger bottom; a sealing device is arranged between the excircle of the plunger bottom and the inner wall of the pipe hole; a fixing device is arranged between the plunger tube and the plunger bottom; and the arrangement of the sealing device enhances the sealing between the excircle of the plunger bottom and the inner wall of the pipe hole and puts an end to the possibility that the hydraulic oil enters from the plunger bottom to cause oil leak at the weld joint of the plunger head.
Description
Technical field
The utility model relates to a kind of multi-stage expansion sleeve hydraulic jack.
Background technique
The large-tonnage dumping car oil cylinder of usefulness is a sinciput formula multi-stage expansion sleeve hydraulic jack in the market, and piston structure has two kinds of forms mostly: one directly processes for the 45# round steel; Two for 45# seamless steel pipe and 45# plug, Q235 plunger back welding connect and form, and each large tank manufacturer adopts a kind of structure in back more now, because weld defects causes invisible micro gap, after being applied to market, causes the leakage of oil of plunger head weld seam.
Fig. 1 is a sinciput formula multi-stage expansion sleeve hydraulic jack welded structure schematic representation.Wherein, plunger tube is by 45# seamless steel pipe and 45# plug, after connecing, Q235 plunger back welding processes, greatly reduce raw-material weight, and resistance to flexure is big, cost of production is low, so this structure is adopted by most of hydraulic jack manufacturer, but the greatest problem that this structure applications is fed back behind the market is the leakage of oil of plunger head weld seam, reason is that the plunger two ends are welded structure, because of air expanded by heating in closed chamber, weld defectss such as airhole very easily occur, and the plunger base welding is difficulty relatively, weldquality can't guarantee that hydraulic oil infiltrates from the bottom weld seam, in case plunger head will cause the plunger leakage of oil after weld defects being arranged or using fatigue failure for a long time.
The model utility content
Technical problem to be solved in the utility model provides a kind of preposition cylinder plug of anti-leakage of oil that can avoid causing because of weld defects leakage of oil.
For solving the problems of the technologies described above, the technical solution of the utility model is: the anti-preposition cylinder plug of leakage of oil, be used for multi-stage expansion sleeve hydraulic jack, comprise plunger tube, the upper end of described plunger tube is welded with plug, be equipped with at the bottom of the plunger in the pore of described plunger tube lower end, be provided with seal arrangement between cylindrical and the described pore inwall at the bottom of the described plunger, be provided with fixing device between at the bottom of described plunger tube and the described plunger.
As a kind of preferred version, described seal arrangement is a seal ring.
As to improvement of the technical scheme, cylindrical is provided with sealed groove at the bottom of the described plunger, and " O " RunddichtringO is installed on the described sealed groove.
As a kind of technological improvement, described fixing device comprises and is arranged on first fixing device and second fixing device between the two ends and described plunger tube at the bottom of the described plunger.
As further technological improvement, described first fixing device comprises the boss that is arranged on described plunger tube endoporus.
As further technological improvement, described first fixing device comprises the back-up ring groove that is arranged on the described plunger tube inwall, in the described back-up ring groove back-up ring is installed.
As further technological improvement, described second fixing device comprises the back-up ring groove that is arranged on the described plunger tube inwall, in the described back-up ring groove back-up ring is installed.
Owing to adopted technique scheme, the anti-preposition cylinder plug of leakage of oil, be used for multi-stage expansion sleeve hydraulic jack, comprise plunger tube, the upper end of described plunger tube is welded with plug, be equipped with at the bottom of the plunger in the pore of described plunger tube lower end, be provided with seal arrangement between cylindrical and the described pore inwall at the bottom of the described plunger, be provided with fixing device between at the bottom of described plunger tube and the described plunger; The sealing between the cylindrical and described pore inwall at the bottom of the described plunger has been strengthened in the setting of seal arrangement, has stopped hydraulic oil and has entered the possibility that causes the leakage of oil of plunger head weld seam from plunger base.
Description of drawings
Fig. 1 is the structural representation that the preposition cylinder plug back welding of background technique connects;
Fig. 2 is the utility model embodiment one a structural representation;
Fig. 3 is the partial enlarged drawing at I place among Fig. 2;
Fig. 4 is the utility model embodiment two a structural representation.
Embodiment
Below in conjunction with embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 2, the anti-preposition cylinder plug of leakage of oil, be used for multi-stage expansion sleeve hydraulic jack, comprise plunger tube 2, the upper end of described plunger tube 2 is welded with plug 1, be equipped with at the bottom of the plunger 3 in the pore of described plunger tube 2 lower ends, be provided with seal arrangement between 3 cylindricals and the described pore inwall at the bottom of the described plunger, be provided with fixing device between 3 at the bottom of described plunger tube 2 and the described plunger; In the present embodiment, 3 cylindricals are provided with sealed groove 41 at the bottom of the described plunger, and " O " RunddichtringO 4 is installed on the described sealed groove 41.
Described fixing device comprises and is arranged on first fixing device and second fixing device between 3 two ends and described plunger tube 2 at the bottom of the described plunger.In the present embodiment, described first fixing device comprises the boss 6 that is arranged on described plunger tube 2 endoporus; Described second fixing device comprises the back-up ring groove 51 that is arranged on described plunger tube 2 inwalls, in the described back-up ring groove 51 back-up ring 5 is installed.
The sealing between 3 cylindricals and described pore inwall at the bottom of the described plunger has been strengthened in the setting of seal arrangement in the utility model, has stopped hydraulic oil and has entered the possibility that causes the leakage of oil of plunger head weld seam from plunger base.
Only be to illustrate invention essence of the present invention for example more than, rather than limiting the scope of the invention.For example:
One, cylindrical is provided with sealed groove 41 at the bottom of the described plunger, on the described sealed groove 41 O RunddichtringO 4 is installed; Except the O RunddichtringO, can also adopt oil sealing, glue envelope, mechanical seal etc.
Two, described first fixing device also can comprise the back-up ring groove that is arranged on described plunger tube 2 inwalls as shown in Figure 3, in the described back-up ring groove back-up ring 7 is installed; Other fixing devices can also welded on the plunger tube 2.
Three, described second fixing device can also adopt the mode of welding etc.
Above equivalence techniques conversion all falls within the protection domain of the present utility model.
Claims (7)
1. the anti-preposition cylinder plug of leakage of oil, be used for multi-stage expansion sleeve hydraulic jack, comprise plunger tube, the upper end of described plunger tube is welded with plug, be equipped with at the bottom of the plunger in the pore of described plunger tube lower end, it is characterized in that: be provided with seal arrangement between cylindrical and the described pore inwall at the bottom of the described plunger, be provided with fixing device between at the bottom of described plunger tube and the described plunger.
2. the preposition cylinder plug of anti-leakage of oil as claimed in claim 1 is characterized in that: described seal arrangement is a seal ring.
3. the preposition cylinder plug of anti-leakage of oil as claimed in claim 2, it is characterized in that: cylindrical is provided with sealed groove at the bottom of the described plunger, and " O " RunddichtringO is installed on the described sealed groove.
4. as claim 1, the preposition cylinder plug of 2 or 3 described anti-leakage of oils, it is characterized in that: described fixing device comprises and is arranged on first fixing device and second fixing device between the two ends and described plunger tube at the bottom of the described plunger.
5. the preposition cylinder plug of anti-leakage of oil as claimed in claim 4 is characterized in that: described first fixing device comprises the boss that is arranged on described plunger tube endoporus.
6. the preposition cylinder plug of anti-leakage of oil as claimed in claim 4 is characterized in that: described first fixing device comprises the back-up ring groove that is arranged on the described plunger tube inwall, in the described back-up ring groove back-up ring is installed.
7. the preposition cylinder plug of anti-leakage of oil as claimed in claim 4 is characterized in that: described second fixing device comprises the back-up ring groove that is arranged on the described plunger tube inwall, in the described back-up ring groove back-up ring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920252562XU CN201531487U (en) | 2009-11-09 | 2009-11-09 | Preposed cylinder plunger for preventing oil leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920252562XU CN201531487U (en) | 2009-11-09 | 2009-11-09 | Preposed cylinder plunger for preventing oil leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531487U true CN201531487U (en) | 2010-07-21 |
Family
ID=42526891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920252562XU Expired - Fee Related CN201531487U (en) | 2009-11-09 | 2009-11-09 | Preposed cylinder plunger for preventing oil leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531487U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455168A (en) * | 2014-11-24 | 2015-03-25 | 张家港保税区亚信汽车零部件科技有限公司 | Low friction cylinder of shock absorber and manufacturing method thereof |
| CN105422547A (en) * | 2015-12-24 | 2016-03-23 | 宁海佰成机械有限公司 | Piston-free oil cylinder |
-
2009
- 2009-11-09 CN CN200920252562XU patent/CN201531487U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455168A (en) * | 2014-11-24 | 2015-03-25 | 张家港保税区亚信汽车零部件科技有限公司 | Low friction cylinder of shock absorber and manufacturing method thereof |
| CN104455168B (en) * | 2014-11-24 | 2017-03-08 | 张家港保税区亚信汽车零部件科技有限公司 | A kind of low-frictional force cylinder barrel of amortisseur and its manufacture method |
| CN105422547A (en) * | 2015-12-24 | 2016-03-23 | 宁海佰成机械有限公司 | Piston-free oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong Wantong Hydraulic Machinery Co., Ltd. Assignor: Wang Wanfa Contract record no.: 2012370000081 Denomination of utility model: Preposed cylinder plunger for preventing oil leakage Granted publication date: 20100721 License type: Exclusive License Record date: 20120411 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20121109 |