CN205618660U - Effectively prevent piston seat of piston jamming - Google Patents
Effectively prevent piston seat of piston jamming Download PDFInfo
- Publication number
- CN205618660U CN205618660U CN201620147304.5U CN201620147304U CN205618660U CN 205618660 U CN205618660 U CN 205618660U CN 201620147304 U CN201620147304 U CN 201620147304U CN 205618660 U CN205618660 U CN 205618660U
- Authority
- CN
- China
- Prior art keywords
- inner cylinder
- cylinder face
- piston
- internal diameter
- face
- 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.)
- Active
Links
Abstract
The utility model discloses an effectively prevent piston seat of piston jamming, its inner wall main part is first inner cylinder face, a serial communication port, the lower extreme of first inner cylinder face is equipped with a step to the extension of internal diameter increase orientation, and the lower edge of step is the step inner cylinder face, and the step inner cylinder face passes through the internal cone face and connects the second inner cylinder face, the internal diameter of second inner cylinder face is littleer than the internal diameter of first inner cylinder face. The utility model discloses simple structure, long service life can solve the condition of piston jamming better, reduce pilot control valve valve after sales maintenance expense, improve the availability factor and the service property (quality) of complete machine hydraulic guide control system.
Description
Technical field
This utility model relates to a kind of piston seat effectively preventing piston clamping stagnation, belongs to pilot-actuated valve technical field of structures.
Background technology
Pilot-actuated valve valve is mainly used in the pilot hydraulic control system of small type hydraulic excavator and other engineering machinery, is the important component part of pilot control system.In pilot hydraulic control system, pilot-actuated valve working solution force feed is provided by guide's delivery valve, by controlling pilot-actuated valve, pilot control hydraulic oil acts on corresponding main valve and controls connection, main valve is driven to control connection valve core movement, implement the corresponding action of executive component, thus meet the action request to executive component of operator.Piston assembly is one of important ingredient of pilot-actuated valve.
Piston assembly in the market is as shown in Figure 1, piston seat inwall is mainly the first inner cylinder face 2-1 that diameter is less, the downside of the first inner cylinder face 2-1 is connected with the second inner cylinder face 2-5 being relatively large in diameter by internal conical surface 2-4, when piston relies on spring compression force to reset, in order to limit the position of piston movement, piston is provided with the cylindrical groove of equipped certain specification elastic spring, utilizes elastic spring to simultaneously act on piston seat and piston realizes limiting piston movement position.Owing to piston seat material hardness is relatively low, elastic spring hardness is higher, after pilot-actuated valve long-term work, piston seat inner conical surface is deformed by elastic spring impact force, inner conical surface intersects seamed edge internal diameter with interior cylinder and tapers into, when seamed edge contacts with outside piston cylinder, frictional force during piston reset is caused to become larger, when frictional force is more than spring compression force, piston will reset thus clamping stagnation alive occurs, cause pilot control to be sent out cannot operate, it is impossible to meet the action request to executive component of operator.
Summary of the invention
To be solved in the utility model is the technical problem of the existing easy clamping stagnation of pilot control valve piston.
In order to solve above-mentioned technical problem, the technical solution of the utility model there is provided a kind of piston seat effectively preventing piston clamping stagnation, its inwall main body is the first inner cylinder face, it is characterized in that, the lower end of described first inner cylinder face is provided with a step extended to internal diameter augment direction, the lower edge of step is step inner cylinder face, and step inner cylinder face connects the second inner cylinder face by internal conical surface；The internal diameter of described first inner cylinder face is less than the internal diameter of the second inner cylinder face.
Preferably, the internal diameter of described step inner cylinder face is more than the internal diameter of the first inner cylinder face.
Preferably, it is connected by rounded corner transition between described step inner cylinder face and internal conical surface.
This utility model simple in construction, service life are long, can preferably solve the situation of piston clamping stagnation, reduce pilot-actuated valve valve after-sales service expense, improve the service efficiency of complete machine Hydraulic guide control system and use quality.
Accompanying drawing explanation
Fig. 1 is the sectional view of conventional piston seat；
The sectional view of a kind of piston seat effectively preventing piston clamping stagnation that Fig. 2 provides for this utility model；
Fig. 3 is the partial enlarged drawing of I part in Fig. 2；
The sectional view of the piston assembly that the piston seat that Fig. 4 provides for using this utility model is made；
Fig. 5 is the partial enlarged drawing of II part in Fig. 4.
Detailed description of the invention
For making this utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment
As shown in Figure 2,3, a kind of piston seat effectively preventing piston clamping stagnation provided for this utility model, its inwall main body is the first inner cylinder face 2-1, and the first inner cylinder face 2-1 envisaged underneath has step inner cylinder face 2-2, step inner cylinder face 2-2 and the first inner cylinder face 2-1 to form step；By rounded corner 2-3 transition between step inner cylinder face 2-2 and internal conical surface 2-4, connect with the second inner cylinder face 2-5 on the downside of internal conical surface 2-4.
Piston 1 is inserted above-mentioned piston seat 2 and makes piston assembly, the the first inner cylinder face 2-1 making piston seat 2 contacts with the external cylindrical surface 1-1 of piston 1, as shown in Figure 5, after pilot-actuated valve long-term work, internal conical surface 2-4 is deformed by elastic spring 3 impact force, owing to adding rounded corner 2-3, above-mentioned impact force is that the active force being converted into upwards directly acts on step inner cylinder face 2-2, but step inner cylinder face 2-2 internal diameter will not be caused to diminish, the diameter of the external cylindrical surface 1-1 of piston 1 it is more than outside the produced seamed edge internal diameter of deformation at collision, so the fault of piston 1 clamping stagnation is stoped up hill and dale.
Claims (3)
1. the piston seat effectively preventing piston clamping stagnation, its inwall main body is the first inner cylinder face (2-1), it is characterized in that, the lower end of described first inner cylinder face (2-1) is provided with a step extended to internal diameter augment direction, the lower edge of step is step inner cylinder face (2-2), and step inner cylinder face (2-2) connects the second inner cylinder face (2-5) by internal conical surface (2-4)；The internal diameter of described first inner cylinder face (2-1) is less than the internal diameter of the second inner cylinder face (2-5).
2. effectively prevent the piston seat of piston clamping stagnation as claimed in claim 1, it is characterised in that the internal diameter of described step inner cylinder face (2-2) is more than the internal diameter of the first inner cylinder face (2-1).
3. effectively prevent the piston seat of piston clamping stagnation as claimed in claim 1, it is characterised in that be connected by rounded corner (2-3) transition between described step inner cylinder face (2-2) and internal conical surface (2-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620147304.5U CN205618660U (en) | 2016-02-26 | 2016-02-26 | Effectively prevent piston seat of piston jamming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620147304.5U CN205618660U (en) | 2016-02-26 | 2016-02-26 | Effectively prevent piston seat of piston jamming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205618660U true CN205618660U (en) | 2016-10-05 |
Family
ID=57035204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620147304.5U Active CN205618660U (en) | 2016-02-26 | 2016-02-26 | Effectively prevent piston seat of piston jamming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205618660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570453A (en) * | 2016-02-26 | 2016-05-11 | 龙工（上海）精工液压有限公司 | Piston base for effectively preventing blockage of piston |
-
2016
- 2016-02-26 CN CN201620147304.5U patent/CN205618660U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570453A (en) * | 2016-02-26 | 2016-05-11 | 龙工（上海）精工液压有限公司 | Piston base for effectively preventing blockage of piston |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105952702A (en) | Balance valve | |
| CN103899596B (en) | A kind of hydraulic lock of band guide's check valve | |
| CN205618660U (en) | Effectively prevent piston seat of piston jamming | |
| CN107701763B (en) | The ratio one-way flow valves of performance improvement | |
| CN204344557U (en) | A kind of ultrahigh pressure pilot operated compound relief valve | |
| CN109026889B (en) | Buffer overflow valve | |
| CN205823772U (en) | A kind of balanced valve | |
| CN109058208B (en) | Buffer overflow valve | |
| CN204083373U (en) | A kind of multi-way valve with off-load protection | |
| CN205618816U (en) | Avoid piston of jamming | |
| CN105570453A (en) | Piston base for effectively preventing blockage of piston | |
| CN106051185A (en) | Balance valve internally provided with buffering valve | |
| CN105422537B (en) | Pressure-increasing overflow valve | |
| CN202790680U (en) | Electronic controlled proportional multi-way valve | |
| CN109026888B (en) | Rotary buffer valve | |
| CN103573733B (en) | A kind of buffering pressure maintaining valve for oil hydraulic motor | |
| CN203655751U (en) | Hydraulic control one-way valve | |
| CN106762899B (en) | One kind automatically resets valve rod assembly | |
| CN203442254U (en) | Leak-proof pressure valve | |
| CN105673931A (en) | Piston for avoiding clamping stagnation | |
| CN205689505U (en) | A kind of force control hydraulic pressure energy saving of system device | |
| CN203162139U (en) | High-pressure sealing plug | |
| CN204140099U (en) | A kind of insertion liquid pressure valve | |
| CN205779971U (en) | A kind of pressure compensation spool effectively reducing Oil shocking | |
| CN109026887B (en) | Buffer valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |