CN104847432A - Engine valve structure - Google Patents
Engine valve structure Download PDFInfo
- Publication number
- CN104847432A CN104847432A CN201510294501.XA CN201510294501A CN104847432A CN 104847432 A CN104847432 A CN 104847432A CN 201510294501 A CN201510294501 A CN 201510294501A CN 104847432 A CN104847432 A CN 104847432A
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- Prior art keywords
- valve
- spring
- seat
- valve structure
- engine valve
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- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses an engine valve structure. The engine valve structure mainly comprises a valve, a guide pipe sleeves the valve, a spring sleeves the periphery of the guide pipe, a spring seat is arranged at the top end of the valve, a lock piece is arranged in the spring seat, and a valve oil seal is arranged between the spring seat and the spring. The engine valve structure has the advantages that by the aid of the variable-pitch valve spring, close fit between the valve and a valve seat or a valve seat ring when the valve is closed can be guaranteed, inertia force generated by a valve mechanism when the valve is opened can be overcome, and a drive part is always controlled by a cam and is not separated from the cam; since inherent frequency of the variable-pitch spring is not a constant value, sympathetic vibration can be avoided and normal working of the valve is ensured.
Description
Technical field
The present invention relates to the applied technical field of variable pitch spring, particularly relate to a kind of engine valve structure.
Background technique
Closely can fit with valve seat or air valve seat ring when the function of valve spring is and ensures valve-closing, and overcome the inertial force that distribution device produces when valve opening, driving component is not departed from mutually by cam production all the time.
Valve spring is generally uniform pitch cylindrical helical spring.When the frequency of okperation of valve spring is equal with its intrinsic vibration frequency or be integral multiple time, valve spring will resonate.Valve timing will be made during resonance to be destroyed, make valve knock-on occur and impact, even make spring fracture.
Summary of the invention
In order to solve the problem existing for background technique, the object of this invention is to provide a kind of engine valve structure, its valve spring adopts variable pitch spring, can avoid spring resonance phenomenon.
To achieve these goals, technological scheme of the present invention 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 seat 2, and described spring seat 2 inside is provided with locking plate 1, is provided with valve oil seal 3 between described spring seat 2 and described spring 4.
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 variable pitch Compress Spring.
Further, the both ends of the surface of described spring 4 and the central axis of described valve 6.
The present invention has following beneficial effect: the present invention adopts variable pitch valve spring, can closely fit with valve seat or air valve seat ring when can either ensure valve-closing, and overcome the inertial force that distribution device produces when valve opening, driving component is not departed from mutually by cam production all the time, again because the natural frequency of variable pitch spring is not definite value, thus resonance can be avoided, ensure that valve normally works.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Description of reference numerals: locking plate 1, spring seat 2, valve oil seal 3, spring 4, conduit 5, valve 6.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
A kind of engine valve structure of the present invention, it mainly comprises valve 6, and the operating conditions 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 intake valve also can reach 300-400 DEG C; Secondly, valve 6 bears the effect of gas force and valve spring force, and makes to be impacted during air valve drop due to the inertial force of distribution device movement parts; 3rd, valve opens and closes with high speed when lubricating condition is very poor and do high speed to-and-fro motion in valve guide bushing 5.
It is peripheral that described conduit 5 is set in valve 6, and the function of conduit 5 is the motion guides to valve 6, ensures that valve 6 does straight reciprocating motion, and valve 6 can correctly be fitted with valve seat or air valve seat ring.In addition, also the heat that valve stem accepts partly is passed to cylinder head.
The operating temperature of described conduit 5 is higher, and lubricating condition is poor, and the machine oil that when working by distribution device, splashing is got up is to lubricate valve stem and valve guide hole.
Described conduit 5 is by gray cast iron, spheroidal graphite cast iron or ferrous based powder metallurgical manufacture, after with certain interference conduit 5 being pressed into the valve guide bushing bore in cylinder head, finish ream valve guide hole again, to ensure the correct matching gap 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 variable pitch Compress Spring, can closely fit with valve seat or air valve seat ring when this kind of structure can either ensure valve-closing, and overcome the inertial force that distribution device produces when valve opening, driving component is not departed from mutually by cam production all the time, again because the natural frequency of variable pitch spring is not definite value, thus resonance can be avoided, ensure that valve normally works.
The internal diameter of described spring 4 slightly larger than or equal 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, ensure that valve 6 is closed rapidly, tightly.
The top of described valve 6 is provided with spring seat 2, and described spring seat 2 inside is provided with locking plate 1, is provided with valve oil seal 3 between described spring seat 2 and described spring 4.
What finally illustrate is, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, other amendments that those of ordinary skill in the art make technological scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (5)
1. an engine valve structure, it mainly comprises valve (6), it is characterized in that, described valve (6) is sheathed conduit (5) outward, the sheathed spring in the periphery (4) of described conduit (5), the top of described valve (6) is provided with spring seat (2), and described spring seat (2) inside is provided with locking plate (1), and described spring seat (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 variable 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 |
|---|---|---|---|
| CN201510294501.XA CN104847432A (en) | 2015-06-02 | 2015-06-02 | Engine valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510294501.XA CN104847432A (en) | 2015-06-02 | 2015-06-02 | Engine valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104847432A true CN104847432A (en) | 2015-08-19 |
Family
ID=53847355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510294501.XA Pending CN104847432A (en) | 2015-06-02 | 2015-06-02 | Engine valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847432A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538563A (en) * | 1984-09-04 | 1985-09-03 | Peterson American Corporation | Helical coil spring damper assemblies |
| CN101131107A (en) * | 2007-09-19 | 2008-02-27 | 张文宝 | Double-overhead camshaft four-valve air distribution mechanism of motorcycle engine |
| CN201137510Y (en) * | 2008-01-11 | 2008-10-22 | 重庆红阳弹簧制造有限公司 | Motorcycle engine valve assembly |
| CN104481624A (en) * | 2014-11-26 | 2015-04-01 | 镇江维纳特气门有限公司 | Anti-knock pressure-resistant valve set |
| CN204663608U (en) * | 2015-06-02 | 2015-09-23 | 南通瑞斯电子有限公司 | A kind of engine valve structure |
-
2015
- 2015-06-02 CN CN201510294501.XA patent/CN104847432A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538563A (en) * | 1984-09-04 | 1985-09-03 | Peterson American Corporation | Helical coil spring damper assemblies |
| CN101131107A (en) * | 2007-09-19 | 2008-02-27 | 张文宝 | Double-overhead camshaft four-valve air distribution mechanism of motorcycle engine |
| CN201137510Y (en) * | 2008-01-11 | 2008-10-22 | 重庆红阳弹簧制造有限公司 | Motorcycle engine valve assembly |
| CN104481624A (en) * | 2014-11-26 | 2015-04-01 | 镇江维纳特气门有限公司 | Anti-knock pressure-resistant valve set |
| CN204663608U (en) * | 2015-06-02 | 2015-09-23 | 南通瑞斯电子有限公司 | A kind of engine valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |