CN205532973U - Common rail injector piston rod check ring limit structure - Google Patents
Common rail injector piston rod check ring limit structure Download PDFInfo
- Publication number
- CN205532973U CN205532973U CN201620293690.9U CN201620293690U CN205532973U CN 205532973 U CN205532973 U CN 205532973U CN 201620293690 U CN201620293690 U CN 201620293690U CN 205532973 U CN205532973 U CN 205532973U
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- CN
- China
- Prior art keywords
- check ring
- piston rod
- stop collar
- annular groove
- ring
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Abstract
The utility model relates to a common rail injector piston rod check ring limit structure, its characterized in that: including piston rod, check ring and stop collar, be equipped with an annular groove on the piston rod, the check ring is for having open -ended C shape, and the check ring can open the hoop through its open -ended elasticity and embrace the piston rod, can inlay the card just after the check ring tightens up automatically and be in in the annular groove, the stop collar suit is on the piston rod, and stop collar one end is equipped with a cavity, the internal diameter of this cavity with the external diameter phase -match of check ring, spacing ways is in support on the check ring and by the check ring, the stop collar other end is used for the coupling spring. The utility model has the advantages of simple and compact structure, rationally, cancel the salient step of installation spring on the piston rod, be favorable to the piston rod to adopt the whole reduction processing mode of not having, reduced its the manufacturing degree of difficulty and cost.
Description
Technical field
This utility model relates to a kind of check ring being arranged on common-rail injector piston rod, specifically common-rail injector piston rod spring retainer ring spacing structure, belongs to diesel electric-controlled injection system field.
Background technology
In existing high pressure common rail injector, it is pressed on oil nozzle needle valve core for making piston rod make eventually, needs on piston core, arrange a step protruded, enable spring to act directly on piston rod, thus compress oil nozzle needle valve core, it is achieved return effect is closed in oil spout.But after using such structure, piston rod cannot use the processing mode of overall centreless grinding, its processing and manufacturing difficulty and relatively costly.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of common-rail injector piston rod spring retainer ring spacing structure is provided, its simple in construction, compact, reasonable, eliminate and on piston rod, pacify spring-loaded protrusion step, be conducive to piston rod to use overall centreless grinding processing mode, reduce its processing and manufacturing difficulty and cost.
The technical scheme provided according to this utility model: common-rail injector piston rod spring retainer ring spacing structure, it is characterized in that: include piston rod, check ring and stop collar, described piston rod is provided with an annular groove, described check ring is the C-shaped with opening, check ring can open hoop by the elasticity of its opening and embrace piston rod, after check ring automatic tightening can just inlay card in described annular groove；Described stop collar is set with on the piston rod, and stop collar one end is provided with a cavity, and the internal diameter of this cavity matches with the external diameter of described check ring, and stop collar is enclosed within described check ring and is propped up by check ring, and the stop collar other end is used for connecting spring.
As further improvement of the utility model, the outer surface of described check ring and bore area are plane, and the outer at check ring two ends is provided with outer intermediate incline, and the interior edge at check ring two ends is provided with interior intermediate incline；The shape of cross section of described annular groove is isosceles trapezoid, and annular groove both sides are slope and mate with the interior intermediate incline at check ring two ends, is plane and mates with check ring bore area bottom annular groove；The inner chamber side face of described stop collar is plane, is provided with intermediate incline between stop collar inner chamber side face and bottom surface, and described intermediate incline mates with the outer intermediate incline at check ring two ends.
As further improvement of the utility model, the shape of cross section of described check ring is circular, and the shape of cross section of described annular groove is semicircle.
This utility model compared with prior art, has the advantage that
1), eliminate the step of protrusion on piston rod, be conducive to it to use overall centreless grinding processing mode, reduce its processing and manufacturing difficulty and cost.
2), check ring be the C-shaped with opening, there is certain elasticity, it is simple to install, piston rod surface will not be damaged.
3), check ring outer equipped with a stop collar, be possible to prevent check ring radial deformation when by axial force to lose efficacy.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment.
Fig. 2 is the structural front view of a kind of check ring.
Fig. 3 is the A-A sectional view in Fig. 2.
Fig. 4 is the structural front view of another kind of check ring.
Fig. 5 is the B-B sectional view in Fig. 4.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in the figure, described common-rail injector piston rod spring retainer ring spacing structure is mainly made up of piston rod 1, check ring 2 and stop collar 3, described piston rod 1 is provided with an annular groove, described check ring 2 is the C-shaped with opening, check ring 2 can open hoop by the elasticity of its opening and embrace piston rod 1, after check ring 2 automatic tightening can just inlay card in described annular groove；Described stop collar 3 is sleeved on piston rod 1, and stop collar 3 one end is provided with a cavity, and the internal diameter of this cavity matches with the external diameter of described check ring 2, and stop collar 3 is enclosed within described check ring 2 and is propped up by check ring 2, and stop collar 3 other end is used for connecting spring 4.
As it is shown in figure 1, use the check ring 2 shown in Fig. 2, Fig. 3 in the present embodiment, the outer surface of this check ring 2 and bore area are plane, and the outer at check ring 2 two ends is provided with outer intermediate incline, and the interior edge at check ring 2 two ends is provided with interior intermediate incline；The shape of cross section of described annular groove is isosceles trapezoid, and annular groove both sides are slope and the interior intermediate incline with check ring 2 two ends mates, and is plane and mates with check ring 2 bore area bottom annular groove；The inner chamber side face of described stop collar 3 is plane, is provided with intermediate incline between stop collar 3 inner chamber side face and bottom surface, and described intermediate incline mates with the outer intermediate incline at check ring 2 two ends.
It addition, this utility model can also use the shape of cross section shown in Fig. 4, Fig. 5 to be circular check ring 2, correspondingly, the shape of cross section of the annular groove on described piston rod 1 should be set to semicircle.
When specifically installing, first make the opening opened with certain angle of check ring 2, then by piston rod 1 through check ring 2 until at the annular groove of piston rod 1, trip spring back-up ring 2, check ring 2 automatic tightening inlay card is in this annular groove, the most again stop collar 3 is enclosed within check ring 2, prevent check ring 2 from being affected and deformation failure in radial directions by axial force, finally load onto spring 4 part such as grade, spring 4 acts on check ring 2 by stop collar 3, finally it is pressed on piston rod 1, piston rod 1 is made hard to bear spring 4 power effect to be pressed on oil nozzle needle valve core.
Claims (3)
1. common-rail injector piston rod spring retainer ring spacing structure, it is characterized in that: include piston rod (1), check ring (2) and stop collar (3), described piston rod (1) is provided with an annular groove, described check ring (2) is the C-shaped with opening, check ring (2) can open hoop by the elasticity of its opening and embrace piston rod (1), after check ring (2) automatic tightening can just inlay card in described annular groove；Described stop collar (3) is sleeved on piston rod (1), stop collar (3) one end is provided with a cavity, the internal diameter of this cavity matches with the external diameter of described check ring (2), stop collar (3) is enclosed within described check ring (2) and above and is propped up by check ring (2), and stop collar (3) other end is used for connecting spring (4).
2. common-rail injector piston rod spring retainer ring spacing structure as claimed in claim 1, it is characterized in that: outer surface and the bore area of described check ring (2) are plane, the outer at check ring (2) two ends is provided with outer intermediate incline, and the interior edge at check ring (2) two ends is provided with interior intermediate incline；The shape of cross section of described annular groove is isosceles trapezoid, and annular groove both sides are slope and the interior intermediate incline with check ring (2) two ends mates, and is plane and mates with check ring (2) bore area bottom annular groove；The inner chamber side face of described stop collar (3) is plane, is provided with intermediate incline between stop collar (3) inner chamber side face and bottom surface, and described intermediate incline mates with the outer intermediate incline at check ring (2) two ends.
3. common-rail injector piston rod spring retainer ring spacing structure as claimed in claim 1, it is characterised in that: the shape of cross section of described check ring (2) is circular, and the shape of cross section of described annular groove is semicircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620293690.9U CN205532973U (en) | 2016-04-08 | 2016-04-08 | Common rail injector piston rod check ring limit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620293690.9U CN205532973U (en) | 2016-04-08 | 2016-04-08 | Common rail injector piston rod check ring limit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205532973U true CN205532973U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620293690.9U Active CN205532973U (en) | 2016-04-08 | 2016-04-08 | Common rail injector piston rod check ring limit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205532973U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142425A (en) * | 2019-06-12 | 2019-08-20 | 温岭市文昌数控机床设备有限公司 | A kind of numerical control knife tower |
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
-
2016
- 2016-04-08 CN CN201620293690.9U patent/CN205532973U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142425A (en) * | 2019-06-12 | 2019-08-20 | 温岭市文昌数控机床设备有限公司 | A kind of numerical control knife tower |
| CN111120171A (en) * | 2019-12-06 | 2020-05-08 | 一汽解放汽车有限公司 | Fuel injection valve assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |