CN204663608U - A kind of engine valve structure - Google Patents
A kind of engine valve structure Download PDFInfo
- Publication number
- CN204663608U CN204663608U CN201520370559.3U CN201520370559U CN204663608U CN 204663608 U CN204663608 U CN 204663608U CN 201520370559 U CN201520370559 U CN 201520370559U CN 204663608 U CN204663608 U CN 204663608U
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- CN
- China
- Prior art keywords
- valve
- spring
- conduit
- utility
- spring base
- 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 engine valve structure, it mainly comprises valve, the outer sheathed conduit of described valve, the sheathed spring in periphery of described conduit, the top of described valve is provided with spring base, described spring base inside is provided with locking plate, between described spring base and described spring, is provided with valve oil seal. The utility model adopts varying pitch valve spring, when valve-closing can either be ensured, can closely fit with valve seating or valve retainer, and overcome the inertia force that when valve opening valve actuating mechanism produces, make driving member be subject to cam production all the time and mutually do not depart from, again because the intrinsic frequency of varying pitch spring is not definite value, thus resonance can be avoided, ensure that valve is normally worked.
Description
Technical field
The utility model relates to the applied technical field of varying pitch spring, relates in particular to a kind of engine valve structure.
Background technology
The function of valve spring is can closely fit with valve seating or valve retainer when ensureing valve-closing, and overcomes the inertia force that the valve actuating mechanism when valve opening produces, and makes driving member be subject to cam production all the time and does not mutually depart from.
Valve spring is generally uniform pitch cylindrical helical spring. When the operating frequency of valve spring is equal with its intrinsic vibration frequency or be integral multiple, valve spring will resonate. Valve timing during resonance, will be made to be destroyed, make valve knock-on occur and impact, even make spring fracture.
Summary of the invention
For the problem solving existing for background technology, the purpose of this utility model is to provide a kind of engine valve structure, and its valve spring adopts varying pitch spring, and spring resonance phenomenon can be avoided.
To achieve these goals, the technical solution of the utility model is achieved in that a kind of engine valve structure, it mainly comprises valve 6, the outer sheathed conduit 5 of described valve 6, the sheathed spring 4 in periphery of described conduit 5, the top of described valve 6 is provided with spring base 2, and described spring base 2 inside is provided with locking plate 1, between described spring base 2 and described spring 4, is provided with valve oil seal 3.
Further, the internal diameter of described spring 4 is equal with the external diameter of described conduit 5.
Further, the internal diameter of described spring 4 is not less than the external diameter of described conduit 5.
Further, described spring 4 adopts varying pitch Compress Spring.
Further, the both ends of the surface of described spring 4 and the central axis of described valve 6.
The utility model has following beneficial effect: the utility model adopts varying pitch valve spring, when valve-closing can either be ensured, can closely fit with valve seating or valve retainer, and overcome the inertia force that when valve opening valve actuating mechanism produces, make driving member be subject to cam production all the time and mutually do not depart from, again because the intrinsic frequency of varying pitch spring is not definite value, thus resonance can be avoided, ensure that valve is normally worked.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Description of reference numerals: locking plate 1, spring base 2, valve oil seal 3, spring 4, conduit 5, valve 6.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in more detail.
A kind of engine valve structure of the utility model, it mainly comprises valve 6, and the condition of work of valve 6 is very poor, and first, head contacts with combustion chamber gases, and be heated serious, the temperature of exhaust valve can up to 800-900 DEG C, and the temperature of inlet valve also can reach 300-400 DEG C; Secondly, valve 6 bears the effect of gas force and valve spring force, and is impacted when making air valve drop due to the inertia force of valve actuating mechanism movement parts; 3rd, valve opens and closes with high speed and moves back and forth at a high speed at the interior work of valve guide bushing 5 when lubricating condition is very poor.
Described conduit 5 is set in valve 6 periphery, and the function of conduit 5 is the motion guides to valve 6, ensures that valve 6 is done straight reciprocating motion, and valve 6 can correctly be fitted with valve seating or valve retainer. In addition, the heat also valve stem being accepted partly is passed to cylinder head.
The operating temperature of described conduit 5 is higher, and lubricating condition is poor, and the machine oil splashing during by valve actuating mechanism work lubricates valve stem and valve guide hole.
Described conduit 5 is manufactured by casting pig, spheroidal graphite cast-iron or ferrous based powder metallurgical, after the valve guide bushing bore with certain interference, conduit 5 being pressed in cylinder head, finish ream valve guide hole again, to ensure the correct fit clearance in the bar portion of described conduit 5 and described valve 6.
The sheathed spring 4 in periphery of described conduit 5, described spring 4 adopts varying pitch Compress Spring, when can either ensureing valve-closing, this kind of structure can closely fit with valve seating or valve retainer, and overcome the inertia force that when valve opening valve actuating mechanism produces, make driving member be subject to cam production all the time and mutually do not depart from, again because the intrinsic frequency of varying pitch spring is not definite value, thus resonance can be avoided, ensure that valve is normally worked.
The internal diameter of described spring 4 is slightly larger than or equals the external diameter of described conduit 5, the both ends of the surface of described spring 4 and the central axis of described valve 6, ensures that valve 6 is closed rapidly, tightly.
The top of described valve 6 is provided with spring base 2, and described spring base 2 inside is provided with locking plate 1, between described spring base 2 and described spring 4, is provided with valve oil seal 3.
What finally illustrate is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, other amendments that those of ordinary skill in the art make the technical solution of the utility model or be equal to replacement, only otherwise the spirit and scope of disengaging technical solutions of the utility model, all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. an engine valve structure, it mainly comprises valve (6), it is characterized in that, the outer sheathed conduit (5) of described valve (6), the sheathed spring in periphery (4) of described conduit (5), the top of described valve (6) is provided with spring base (2), and described spring base (2) inside is provided with locking plate (1), and described spring base (2) bottom is provided with valve oil seal (3).
2. a kind of engine valve structure according to claim 1, is characterized in that, the internal diameter of described spring (4) is equal with the external diameter of described conduit (5).
3. a kind of engine valve structure according to claim 1, is characterized in that, the internal diameter of described spring (4) is not less than the external diameter of described conduit (5).
4. a kind of engine valve structure according to claim 1, is characterized in that, described spring (4) adopts varying pitch Compress Spring.
5. a kind of engine valve structure according to claim 1, is characterized in that, the both ends of the surface of described spring (4) and the central axis of described valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520370559.3U CN204663608U (en) | 2015-06-02 | 2015-06-02 | A kind of engine valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520370559.3U CN204663608U (en) | 2015-06-02 | 2015-06-02 | A kind of engine valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204663608U true CN204663608U (en) | 2015-09-23 |
Family
ID=54133999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520370559.3U Expired - Fee Related CN204663608U (en) | 2015-06-02 | 2015-06-02 | A kind of engine valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204663608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847432A (en) * | 2015-06-02 | 2015-08-19 | 南通瑞斯电子有限公司 | Engine valve structure |
-
2015
- 2015-06-02 CN CN201520370559.3U patent/CN204663608U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847432A (en) * | 2015-06-02 | 2015-08-19 | 南通瑞斯电子有限公司 | Engine valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160602 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |