CN204226756U - A kind of check valve structure of fuel pump - Google Patents
A kind of check valve structure of fuel pump Download PDFInfo
- Publication number
- CN204226756U CN204226756U CN201420693139.4U CN201420693139U CN204226756U CN 204226756 U CN204226756 U CN 204226756U CN 201420693139 U CN201420693139 U CN 201420693139U CN 204226756 U CN204226756 U CN 204226756U
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- CN
- China
- Prior art keywords
- valve body
- valve
- oil outlet
- cylinder
- outlet housing
- 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 - Fee Related
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Abstract
The utility model discloses a kind of check valve structure of fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.Adopt technique scheme, avoid when fluctuation appears in fuel pressure, check spring Absorbable organic halogens be fixed on valve rod, avoid and come off, simultaneously, to be coordinated with valve rod by stem guiding portion and lead, achieve the centering of valve rod straight reciprocating motion, improve valve body and the not tight defect of valve seal.
Description
Technical field
The utility model relates to fuel oil supply system technical field, is specifically related to a kind of check valve structure of fuel pump.
Background technique
Vehicle fuel supply system requires still to keep certain pressure after car load is flame-out, therefore arranges check valve structure at the oil outlet place of fuel pump, after cut-out of fuel pump, stops the fuel oil reverse flow of system pipeline, with the pressure in keeping system pipeline.
Existing fuel pump check valve structure, as shown in Figure 1, check valve 4 ' is provided with in oil outlet housing 1 ', seam valve body 2 ' is resisted against the opening of check valve 4 ', check valve body 2 ' is provided with the first cone boss 21 ', integrated second cone boss 11 ' is provided with in oil outlet housing 1 ', the small end of the first cone boss 21 ' and the second cone boss 11 ' is disposed adjacent, and check spring 3 ' is set between, fuel oil enters from check valve 4 ', fuel pressure forces check spring 3 ' compresses, check valve body 2 ' is opened, work as cut-out of fuel pump, check spring 3 ' applies spring-return power on check valve body 2 ', fuel oil is closed in oil outlet housing 1 '.
But, in existing structure, check spring 3 ' is set on two cone bosses, and check spring 3 ' and adjacent component are without being connected, when fuel oil acts on check valve body 2 ', the direction of its active force is disorderly and unsystematic, do not have rule, easily causes check spring 3 ' torsional deformation and comes off, simultaneously, due to when check valve body 2 ' moves without guide structure,, there is deflection, cause with check valve 4 ' poorly sealed in the movement locus that during return, easy disengaging affected by vibration is preset.
Model utility content
The utility model provides a kind of check valve structure of fuel pump, can improve the reliability of check valve body motion, realize the excellent sealing of check valve body and check valve, and avoid coming off of check spring.
To achieve these goals, the utility model takes following technological scheme:
A kind of check valve structure of fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.
Preferably, described stem guiding portion comprises the end being located at described oil outlet housing and the cylinder extended in described oil outlet housing, and described valve rod coordinates with described cylinder and leads.
Preferably, described stem guiding portion comprises the first cylinder, second cylinder of coaxial line, with the connecting tendon being connected described first cylinder and described second, described first cylinder and described oil outlet housing affixed, described second cylinder coordinates with described valve rod and leads.
Preferably, described connecting tendon is located at the outer wall of described second cylinder and is connected with described first cylinder along its axial extension.
Preferably, the inwall of described oil outlet housing is provided with the first groove, and described first cylinder setting-in is fixed in described first groove.
Preferably, be also provided with valve body stop part, described valve body stop part is located at described valve body and is entered within the stroke of pump core.
Preferably, described valve body stop part comprises three bar shaped muscle, and each described bar shaped muscle radially intersects at axle center place from the inwall of described valve respectively.
Preferably, described valve rod is provided with installation base, and described valve body is provided with mounting groove, and described installation base is flush-mounted in described mounting groove.
Preferably, described valve is provided with conical surface near the opening end of described valve body, and described conical surface coordinates locking with the outer wall of described valve body.
Preferably, described oil outlet housing and described stem guiding portion are acetal plastic part, and described valve body is oil resistant rubber part.
The beneficial effect that the utility model obtains is:
The utility model provides a kind of check valve structure of fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.Adopt technique scheme, when there is fluctuation in fuel pressure, check spring still can be stable be fixed on valve rod, avoid and come off, simultaneously, to be coordinated with valve rod by stem guiding portion and lead, achieve the centering of valve rod straight reciprocating motion, improve valve body and the not tight defect of valve seal.
Accompanying drawing explanation
Fig. 1 is the sectional view of the check valve structure of prior art;
Fig. 2 is the half sectional view of an embodiment of check valve structure of the present utility model;
Fig. 3 is the half sectional view of an embodiment of oil outlet housing of the present utility model;
Fig. 4 is the partial sectional view of an embodiment of oil outlet housing of the present utility model;
Fig. 5 is the axonometric drawing of an embodiment in stem guiding portion of the present utility model;
Fig. 6 is the sectional view of an embodiment of oil outlet housing of the present utility model and stem guiding portion cooperating structure;
Fig. 7 is the sectional view of an embodiment of the linkage structure of valve rod of the present utility model and valve body.
Description of reference numerals:
1 '-oil outlet housing; 11 '-the second cone boss; 2 '-seam valve body; 3 '-check spring; 4 '-check valve; 21 '-the first cone boss; 10-oil outlet housing; 11-first groove; 12-guide surface; 20-valve rod; 21-installation base; 30-valve body; 31-mounting groove; 40-valve; 41-conical surface; 50-check spring; 60-stem guiding portion; 61-first cylinder; 62-second cylinder; 63-connecting tendon; 70-valve body stop part; 100-check valve structure.
Embodiment
In order to make those skilled in the art better understand the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is described in detail.
Shown in composition graphs 2-7, the utility model provides a kind of check valve structure 100 of fuel pump, comprise oil outlet housing 10, be located at the valve rod 20 in oil outlet housing 10, be fixed in the valve body 30 of valve rod 20 end, the valve 40 of locking is coordinated with valve body 30, in order to improve the defect of prior art, the utility model has made following technological improvement: also comprise the stem guiding portion 60 be located in oil outlet housing 10, valve rod 20 is located in stem guiding portion 60 away from one end of valve body 30, valve rod 20 coordinates with stem guiding portion 60 and leads, and be provided with check spring 50 outside valve rod 20, one end of check spring 50 and valve body 30 against, the other end and valve body 30 guide portion against.Adopt technique scheme, when there is fluctuation in fuel pressure, check spring 50 still can be stable be fixed on valve rod 20, avoid and come off, simultaneously, to be coordinated with valve rod 20 by stem guiding portion 60 and lead, achieve the centering of valve rod 20 straight reciprocating motion, improve the defect that valve body 30 is poorly sealed with valve 40.
In above-mentioned structure, there is various embodiments in stem guiding portion 60, as embodiment one: arrange at the outer wall of valve rod 20 boss in axial direction extended, the inwall of oil outlet housing 10 arranges chute, and boss is slidably connected to realization in chute and coordinates guiding; For another example embodiment two: stem guiding portion 60 comprises the end being located at oil outlet housing 10 and the cylinder extended to oil outlet housing 10 inside, valve rod 20 coordinates with cylinder and leads, in sum, embodiment two comparatively embodiment one compares, structure is relatively simple, and avoids and on oil outlet housing 10, offer chute weaken himself intensity.But, consider the structure bulkier of embodiment two, in order to overcome this defect, the utility model is preferably as follows embodiment three: stem guiding portion 60 comprises the first cylinder 61, second cylinder 62 of coaxial line, with the connecting tendon 63 of connection first cylinder 61 and the second cylinder 62, first cylinder 61 is affixed with oil outlet housing 10, and the second cylinder 62 coordinates with valve rod 20 and leads.Integrally-built cylinder is optimized for the first cylinder 61 and the second cylinder 62 of Split type structure by this scheme, and it is affixed with oil outlet housing 10 by the first cylinder 61, second cylinder 62 coordinates with valve rod 20 and leads, and both saves material, and achieves again the lightweight of fuel oil pump assembly.
And further, connecting tendon 63 is located at the outer wall of the second cylinder 62 and is axially connected with the first cylinder 61 along it, compare between the adjacent face that connecting tendon 63 is comparatively located at two cylinder by this scheme, join strength is strengthened, and the connecting tendon 63 in this scheme achieve simultaneously with check spring 50 against, the design simplified the structure.
Further, according to the structure of above-mentioned preferred valve body guide portion 60, the first cylinder 61 is preferably as follows linkage structure with oil outlet housing 10, and the inwall of oil outlet housing 10 is provided with the first groove 11, first cylinder 61 setting-in and is fixed in the first groove 11.Particularly, stem guiding portion 60 puts into oil outlet housing 10 from one end of the second cylinder 62, and the first cylinder 61 is press-fited in the first groove 11 of annular, then tightened up by the end of hot riveting technique by oil outlet housing 10, both realizations are fixed, this structural manufacturing process is simple, connects reliable, and saves the use of link.More preferably, conveniently install, the end of oil outlet housing 10 is provided with guide surface 12, and guide surface 12 reduces installation difficulty, improves installation efficiency.
In order to avoid valve body 30 depart from valve rod 20 time, valve body 30 enter pump core blocking fuel pump, the check valve structure 100 that the utility model provides also is provided with valve body stop part 70, and valve body stop part 70 is located at valve body 30 and is entered within the stroke of pump core.This structure, while guarantee fuel oil passes through smoothly, blocks valve body 30 and enters pump core initiation fuel pump failure.Valve body stop part 70 can be preferably as follows embodiment: it comprises three bar shaped muscle, and each bar shaped muscle radially intersects at axle center place from the inwall of valve 40 respectively.This scenario-frame is simple, and it is convenient to realize, and less to the circulating resistance of fuel oil.Certainly, valve body stop part 70 also can be set to other structures, as arranged projection at the inwall of valve 40, increases surface friction drag during relative movement between valve body 30 and valve 40, thus increases the difficulty that valve body 30 enters pump core.
Except above-mentioned embodiment avoids valve body 30 to enter except pump core, valve body 30 also can be avoided from another point of view to enter pump core, namely ensure the reliable connection of valve body 30 and valve rod 20, guarantee that both can not come off.Preferred embodiment is: valve rod 20 is provided with installation base 21, is provided with mounting groove 31 in valve body 30, and installation base 21 is flush-mounted in mounting groove 31.And due to valve body 30 preferred rubber material, before installation, make it expand by heating, embedded in mounting groove 31 by installation base 21, and be stablely after the cooling period coated on valve rod 20, this scheme reduces valve body 30 and to come off the probability of valve rod 20, and vibrational power flow is simple, it is convenient to realize.Certainly, also both also screw connecting structure can be adopted.
In order to improve the sealability of valve body 30 and valve 40, be preferably provided with conical surface 41 at valve 40 near the opening end of valve body 30, conical surface 41 coordinates locking with the inwall of valve body 30.This approach increases the area of contact between valve body 30 and valve 40, improve both fitment stability, strengthen sealability.
The check valve structure 100 that the utility model provides, optimizes hydraulic fluid port housing 10 and stem guiding portion 60 is acetal plastic part; Valve body 30 is oil resistant rubber part, and polyoxymethylene has good oil resistance and self lubricity, extends the working life in oil outlet housing 10 and stem guiding portion 60, reduces assembling difficulty between the two; In like manner, the valve body 30 of oil resistant rubber material, can reduce greasy dirt to destructions such as its corrosional qualitative changes, extend its working life.
Although the utility model is described in conjunction with above embodiment, but the utility model is not limited to above embodiment, and just by the restriction of claim, related domain common technique personnel can easily modify to it and change, but do not leave essential idea of the present utility model and scope.
Claims (10)
1. the check valve structure of a fuel pump, comprise oil outlet housing, the valve rod be located in described oil outlet housing, be fixed in described valve stem end valve body, coordinate the valve of locking with described valve body, it is characterized in that, also comprise the stem guiding portion be located in described oil outlet housing, described valve rod is located in described stem guiding portion away from one end of described valve body, described valve rod coordinates with described stem guiding portion and leads, and be provided with check spring outside described valve rod, one end of described check spring and described valve body against, the other end and described valve body guide portion against.
2. check valve structure according to claim 1, is characterized in that, described stem guiding portion comprises the end being located at described oil outlet housing and the cylinder extended in described oil outlet housing, and described valve rod coordinates with described cylinder and leads.
3. check valve structure according to claim 1, it is characterized in that, described stem guiding portion comprises the first cylinder, second cylinder of coaxial line, with the connecting tendon being connected described first cylinder and described second, described first cylinder and described oil outlet housing affixed, described second cylinder coordinates with described valve rod and leads.
4. check valve structure according to claim 3, is characterized in that, described connecting tendon is located at the outer wall of described second cylinder and is connected with described first cylinder along its axial extension.
5. check valve structure according to claim 3, is characterized in that, the inwall of described oil outlet housing is provided with the first groove, and described first cylinder setting-in is fixed in described first groove.
6. the check valve structure according to any one of claim 1-5, is characterized in that, is also provided with valve body stop part, and described valve body stop part is located at described valve body and is entered within the stroke of pump core.
7. check valve structure according to claim 6, is characterized in that, described valve body stop part comprises three bar shaped muscle, and each described bar shaped muscle radially intersects at axle center place from the inwall of described valve respectively.
8. the check valve structure according to any one of claim 1-5, is characterized in that, described valve rod is provided with installation base, and described valve body is provided with mounting groove, and described installation base is flush-mounted in described mounting groove.
9. the check valve structure according to any one of claim 1-5, is characterized in that, described valve is provided with conical surface near the opening end of described valve body, and described conical surface coordinates locking with the outer wall of described valve body.
10. the check valve structure according to any one of claim 1-5, is characterized in that, described oil outlet housing and described stem guiding portion are acetal plastic part, and described valve body is oil resistant rubber part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420693139.4U CN204226756U (en) | 2014-11-18 | 2014-11-18 | A kind of check valve structure of fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420693139.4U CN204226756U (en) | 2014-11-18 | 2014-11-18 | A kind of check valve structure of fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204226756U true CN204226756U (en) | 2015-03-25 |
Family
ID=52924855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420693139.4U Expired - Fee Related CN204226756U (en) | 2014-11-18 | 2014-11-18 | A kind of check valve structure of fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204226756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405937A (en) * | 2014-11-18 | 2015-03-11 | 安徽江淮汽车股份有限公司 | Check valve structure for fuel oil pump |
-
2014
- 2014-11-18 CN CN201420693139.4U patent/CN204226756U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405937A (en) * | 2014-11-18 | 2015-03-11 | 安徽江淮汽车股份有限公司 | Check valve structure for fuel oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20191118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |