CN102758659A - Internal-combustion engine valve lock clamp mechanical beneficial to valve rotation - Google Patents
Internal-combustion engine valve lock clamp mechanical beneficial to valve rotation Download PDFInfo
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- CN102758659A CN102758659A CN201210272102XA CN201210272102A CN102758659A CN 102758659 A CN102758659 A CN 102758659A CN 201210272102X A CN201210272102X A CN 201210272102XA CN 201210272102 A CN201210272102 A CN 201210272102A CN 102758659 A CN102758659 A CN 102758659A
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- valve spring
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Abstract
The invention discloses an internal-combustion engine valve lock clamp mechanism, which comprises a valve lock clamp, a valve, a valve spring plate upper-seat, a valve spring and a valve spring plate lower-seat; through observation from the valve spring plate upper-seat toward the direction of the valve spring, when the valve spring upper-seat rotates clockwise relative to the valve spring, the friction coefficient between the contact surfaces of the valve spring upper-seat and the valve spring is smaller than that of between the contact surfaces between the valve spring plate lower-seat and a cylinder cover; when the valve spring plate upper-seat rotates counterclockwise relative to the valve spring, the friction coefficient between the contact surfaces of the valve spring upper-seat and the valve spring is smaller than that of between the contact surfaces of the valve spring lower-seat and the cylinder cover; and whatever the valve spring upper-seat rotates toward any direction relative to the valve spring, the friction coefficient between the contact surfaces of the valve spring plate lower-seat and the cylinder cover is unchanged. The internal-combustion engine valve clamp mechanism is simple in structure and beneficial to valve rotation, ensures that the valve is uniformly heated and can avoid the phenomena of local deformation or ablation and the like.
Description
Technical field
The invention belongs to technical field of internal combustion engines, relate to valve collet mechanism.
Background technique
Combustion chambers of internal combustion engines arranges that valve and spark plug axis are not arranged in parallel at an angle often, and this is because of the requirement of having considered surface to volume ratio, does the surface area of firing chamber little as far as possible.The consequence of doing like this is that the axes intersect of axis and spark plug of valve is not parallel.In internal-combustion engine normal operation process, because valve is that oblique spark plug axial direction moves reciprocatingly,, thereby may produce phenomenons such as local deformation or ablation so it is inhomogeneous to cause the valve head to be heated, influence the internal-combustion engine proper functioning.In order to prevent that this phenomenon from taking place, valve rotating mechanism is adopted by increasing IC Engine Design person.
Structure described in the patent No.: ZL200720124901.7 (engine exhaust valve rod whirligig) is to have utilized valve rocker and engine valve stem contact position not on valve gyration center line, makes the valve rotation thereby produced an arm of force.This kind structure is widely used on the motorcycle, is connected with valve tappet and the valve of car combustion engine is many, if adopt the valve rocker of this structure at car combustion engine, valve tappet is rotated, and does not reach the purpose that valve is rotated.
And for example the structure described in the patent No.: the CN101975097A (engine valve rotating machinery) has adopted the structure that a bearing is installed between valve spring dish and the valve spring, and this patent claims that such structure helps the rotation of valve.This patent has been ignored a problem; Valve is impossible unprovokedly oneself to rotate; Even if gaseous combustion has thrust to cause the valve rotation to valve in the firing chamber; This rotation mode also is slow and unordered, can not reach the effect of valve thermally equivalent of letting, and the structure of this patent is unreasonable.
In sum.There is following shortcoming in existing technology:
1. adopt valve rocker to contact and put the not valve rotational structure on valve gyration center line, can only be used in the valve top
Valve rocker and valve contacting structure, inapplicable for the internal-combustion engine setting type that valve tappet is arranged;
2. between valve spring dish and valve spring, install the structure of bearing additional, not more consideration drives valve, such knot
Thereby structure can not reach the effect that lets valve rotate thermally equivalent.
Summary of the invention
The object of the present invention is to provide a kind of valve collet mechanism that is beneficial to the valve rotation, in order to avoid the valve head is because of inhomogeneous cause local deformation or the ablation of being heated.
For achieving the above object, the technological scheme that the present invention adopts is:
Valve rotation principle:
As shown in Figure 2, the key dimension of valve spring has:
The Spring Steel Wire diameter d; Spring race diameter D; Spring inner ring inside diameter D 1;
Mean diameter of coil D
2Pitch t; Height H; The length L of spring thread; n
0Number of total coils;
Lead angle α;
The relation of the spring length and the number of turns is:
L=（ΠD
2n
0）/cosα
Calculate the variable quantity △ n of the number of coils according to following formula
△n=L（cosα
2-cosα
1）/ΠD
2
When valve was opened, the spring height was by H
1Be compressed to H
2The time, the spring thread length L is constant, mean diameter of coil D
2Constant, lead angle α diminishes, and it is big that cos α becomes, number of total coils n
0Become big.
If this moment, position, spring lower end mouth place can remain unchanged, then this moment, spring can push away spring holder and valve rotates to a direction.
During valve-closing, opposite with said process, this moment, valve can be turned back to initial position.
The present invention proposes a kind of simple in structure, engine valve locker mechanism of being beneficial to valve rotation, comprising: following of valve collet, valve, the valve spring dish seat of honour, valve spring, valve spring dish; Observe from the valve spring seat of honour toward the valve spring direction; When the valve spring seat of honour turns clockwise with respect to valve spring; Friction factor between the surface of contact of the setting valve spring seat of honour and valve spring is μ 1; Friction factor between following of valve spring dish and the cylinder head surface of contact is μ 2, and then μ 2>μ 1.
Further, observe from the valve spring seat of honour toward the valve spring direction, when the valve spring seat of honour was rotated counterclockwise with respect to valve spring, the friction factor between the surface of contact of the setting valve spring seat of honour and valve spring was μ 3; Friction factor between following of valve spring dish and the cylinder head surface of contact is μ 4, and then μ 4>μ 3.
Observe from the valve spring seat of honour toward the valve spring direction; When the valve spring seat of honour turned clockwise with respect to valve spring, the friction factor between the surface of contact of the valve spring seat of honour and spring was greater than the friction factor between the surface of contact of the valve spring seat of honour and valve spring when the valve spring seat of honour is rotated counterclockwise with respect to valve spring.
The surface of contact of the valve spring seat of honour and valve spring is provided with ripple.
Said ripple is to point to anticlockwise texture rule by some wedge angles to rearrange.
No matter the valve spring seat of honour is with respect to the rotation of valve spring whichaway, and following of valve spring dish is identical with friction factor between the cylinder head surface of contact.
Following of valve spring dish and cylinder head surface of contact are provided with ripple.
Said ripple is to be rearranged by some radial texture rules.
The form that the texture of said ripple adopts form of grooves, burr form or groove and burr to arrange in pairs or groups mutually.
Owing to adopted such scheme, the present invention has the following advantages:
1. both be applicable to the internal-combustion engine arrangement of valve tappet, structurally also considered the source problem that comes of valve actuation power;
2. both be applicable to the layout that valve rocker and valve directly contact, also be applicable to the structure of band valve tappet;
3. simple in structure, easy for installation.
Description of drawings
Fig. 1 is the generalized section of the valve collet mechanism of an embodiment of the present invention.
Fig. 2 is a valve spring physical dimension schematic representation embodiment illustrated in fig. 1.
Fig. 3 is the structural representation at the valve spring dish seat of honour embodiment illustrated in fig. 1.
Fig. 4 is the structure schematic bottom view of following of valve spring dish embodiment illustrated in fig. 1.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is further described.
As shown in Figure 1, the present invention is a kind of to be beneficial to the valve collet mechanism of valve rotation, comprising: following 5 of valve collet 1, valve 2, the valve spring dish seat of honour 3, valve spring 4, valve spring dish.
When the valve spring seat of honour 3 turns clockwise with respect to valve spring 4 (3 toward the observation of valve spring 4 directions from the valve spring seat of honour), the friction factor between the surface of contact of the setting valve spring seat of honour 3 and spring 4 is μ 1; Friction factor between following 5 on valve spring dish and the cylinder head surface of contact is μ 2, and μ 2>μ 1.
When the valve spring seat of honour 3 is rotated counterclockwise with respect to valve spring 4 (3 toward the observation of valve spring 4 directions from the valve spring seat of honour), the friction factor between the surface of contact of the setting valve spring seat of honour 3 and spring 4 is μ 3; Friction factor between following 5 on valve spring dish and the cylinder head surface of contact is μ 4, and μ 4>μ 3.
In one embodiment; Further can set μ 1>μ 3; I.e. when the valve spring seat of honour 3 turns clockwise with respect to valve spring 4 (3 toward the observation of valve spring 4 directions from the valve spring seat of honour); Friction factor between the surface of contact of the valve spring seat of honour 3 and spring 4 is greater than the friction factor between the surface of contact of (4 directions are observed from the valve spring seat of honour 3 toward valve spring) the valve spring seat of honour 3 and spring 4 when the valve spring seat of honour 3 is rotated counterclockwise with respect to valve spring 4; Through on the valve spring seat of honour 3 with to process unidirectional ripple be a kind of implementation preferably on the surface of contact of spring 4; Shown in Fig. 3 embodiment, said unidirectional ripple is to point to anticlockwise texture 31 rules by some wedge angles to rearrange.
The texture 31 that shows unidirectional ripple among Fig. 3 all adopts form of grooves, and in fact, they also can adopt the burr form.
In one embodiment, further can set μ 2=μ 4, promptly no matter the valve spring seat of honour 3 is with respect to the rotation of valve spring 4 whichaways, and following 5 on valve spring dish is identical with friction factor between the cylinder head surface of contact.
Through on following 5 on valve spring dish and cylinder head surface of contact, processing two-directional corrugations is a kind of implementation preferably, and shown in Fig. 4 embodiment, said two-directional corrugations is to be rearranged by some radial texture 51 rules.The texture 31 that shows two-directional corrugations among Fig. 4 all adopts form of grooves, and in fact, they also can adopt the burr form.
The core of structure of the present invention is the ingenious design to coefficientoffriction 1, μ 2, μ 3, μ 4 and correlation thereof, as for the form of friction line (ripple), and except above-mentioned groove or burr, mode or alternate manner that can also to be groove arrange in pairs or groups with burr mutually; As for the texture shape,, can also be wedge angle and the radial mode or the alternate manner of collocation mutually except above-mentioned wedge angle or radial.
Manufacturing process as for obtaining friction line (ripple) can adopt feasible processing modes such as spraying, punching press, milling, casting.
In a word, as long as coefficientoffriction 1, μ 2, μ 3, μ 4 can satisfy above-mentioned requirements, form, texture shape, arranging density and the processing mode thereof of friction line (ripple) can have multiple variation, and this does not give unnecessary details.
The present invention has utilized valve spring can promote the characteristics that valve rotates back and forth just in several angle; Utilize the unidirectional ripple 31 of 3 lower end surfaces, the valve spring dish seat of honour; Valve spring and the valve spring dish seat of honour 3 and valve spring 4 are rotated back and forth when contacting; Friction factor is different; Valve 2 is rotated in one direction; And thereby the bottom surface of following 5 on valve spring dish has adopted two-directional corrugations 51 to increase friction factor and thereby it is motionless or angle of swing is little all to have reached valve spring 4 lower ends greatly than the friction factor of the valve spring dish seat of honour 3 any sides, valve spring 4 upper ends and the big characteristics of valve 2 angle of swing, thus reach the effect of valve thermally equivalent.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiments, and needn't pass through performing creative labour being applied among other embodiments in the General Principle of this explanation.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (9)
1. engine valve locker mechanism comprises: following of valve collet, valve, the valve spring dish seat of honour, valve spring, valve spring dish; It is characterized in that: observe from the valve spring seat of honour toward the valve spring direction; When the valve spring seat of honour turns clockwise with respect to valve spring; Friction factor between the surface of contact of the setting valve spring seat of honour and valve spring is μ 1; Friction factor between following of valve spring dish and the cylinder head surface of contact is μ 2, and then μ 2>μ 1.
2. engine valve locker according to claim 1 mechanism is characterized in that:
Observe from the valve spring seat of honour toward the valve spring direction, when the valve spring seat of honour was rotated counterclockwise with respect to valve spring, the friction factor between the surface of contact of the setting valve spring seat of honour and valve spring was μ 3; Friction factor between following of valve spring dish and the cylinder head surface of contact is μ 4, and then μ 4>μ 3.
3. engine valve locker according to claim 2 mechanism is characterized in that:
Observe from the valve spring seat of honour toward the valve spring direction; When the valve spring seat of honour turned clockwise with respect to valve spring, the friction factor between the surface of contact of the valve spring seat of honour and valve spring was greater than the friction factor between the surface of contact of the valve spring seat of honour and valve spring when the valve spring seat of honour is rotated counterclockwise with respect to valve spring.
4. engine valve locker according to claim 1 mechanism is characterized in that:
The surface of contact of the valve spring seat of honour and valve spring is provided with ripple.
5. engine valve locker according to claim 4 mechanism, it is characterized in that: said ripple is to point to anticlockwise texture rule by some wedge angles to rearrange.
6. engine valve locker according to claim 1 mechanism is characterized in that: no matter the valve spring seat of honour is with respect to the rotation of valve spring whichaway, and following of valve spring dish is identical with friction factor between the cylinder head surface of contact.
7. engine valve locker according to claim 6 mechanism is characterized in that: following of valve spring dish is provided with ripple with the cylinder head surface of contact.
8. engine valve locker according to claim 7 mechanism, it is characterized in that: said ripple is to be rearranged by some radial texture rules.
9. according to claim 4,5,7 or 8 described engine valve locker mechanisms, it is characterized in that: the form that the texture of said ripple adopts form of grooves, burr form or groove and burr to arrange in pairs or groups mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210272102XA CN102758659A (en) | 2012-08-01 | 2012-08-01 | Internal-combustion engine valve lock clamp mechanical beneficial to valve rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210272102XA CN102758659A (en) | 2012-08-01 | 2012-08-01 | Internal-combustion engine valve lock clamp mechanical beneficial to valve rotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102758659A true CN102758659A (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210272102XA Pending CN102758659A (en) | 2012-08-01 | 2012-08-01 | Internal-combustion engine valve lock clamp mechanical beneficial to valve rotation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422931A (en) * | 2013-07-16 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Three-groove valve collet mechanism beneficial to rotation of engine valves |
| CN113339095A (en) * | 2021-06-18 | 2021-09-03 | 中国北方发动机研究所(天津) | Novel valve driving mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343835A (en) * | 1992-12-07 | 1994-09-06 | Charter Manufacturing Company, Inc. | Valve spring retainer |
| US6119645A (en) * | 1999-02-16 | 2000-09-19 | Dana Corporation | Valve stem seal with non-rotatable retainer |
| KR20080053853A (en) * | 2006-12-11 | 2008-06-16 | 현대자동차주식회사 | Structure of valve for engine using electromagnetism |
| CN101382079A (en) * | 2007-09-04 | 2009-03-11 | 爱知机械工业株式会社 | Valve train for internal combustion engine |
-
2012
- 2012-08-01 CN CN201210272102XA patent/CN102758659A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343835A (en) * | 1992-12-07 | 1994-09-06 | Charter Manufacturing Company, Inc. | Valve spring retainer |
| US6119645A (en) * | 1999-02-16 | 2000-09-19 | Dana Corporation | Valve stem seal with non-rotatable retainer |
| KR20080053853A (en) * | 2006-12-11 | 2008-06-16 | 현대자동차주식회사 | Structure of valve for engine using electromagnetism |
| CN101382079A (en) * | 2007-09-04 | 2009-03-11 | 爱知机械工业株式会社 | Valve train for internal combustion engine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422931A (en) * | 2013-07-16 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Three-groove valve collet mechanism beneficial to rotation of engine valves |
| CN113339095A (en) * | 2021-06-18 | 2021-09-03 | 中国北方发动机研究所(天津) | Novel valve driving mechanism |
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Application publication date: 20121031 |