CN101100952B - Engine exhaust valve structure - Google Patents
Engine exhaust valve structure Download PDFInfo
- Publication number
- CN101100952B CN101100952B CN2007100925074A CN200710092507A CN101100952B CN 101100952 B CN101100952 B CN 101100952B CN 2007100925074 A CN2007100925074 A CN 2007100925074A CN 200710092507 A CN200710092507 A CN 200710092507A CN 101100952 B CN101100952 B CN 101100952B
- Authority
- CN
- China
- Prior art keywords
- exhaust valve
- valve rod
- valve
- end cap
- exhaust
- 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
Links
Images
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
This invention is engine exhausting valve structure. The exhausting valve stem passes through exhausting valve base and valve guide pipe. The top of the exhausting valve stem is assembled with valve lock clamp. Outside of the valve lock clamp is spring base. The valve spring is arranged on the exhausting valve stem. There is valve gap setting screw above the top of the exhausting valve stem. The axes of the said screw and exhausting valve stem are at the same line. There is end cap between valve gap setting screw and exhausting valve stem. The said end cap covers on the exhausting valve stem through its dead hole which is at the bottom. There is certain space between the end face of the said dead hole and the top face of exhausting valve stem. This invention can prevent the local overheat of exhausting valve stem and prevent rupture of exhausting valve stem.
Description
Technical field
The invention belongs to technical field of engines, specifically, relate to a kind of engine exhaust valve structure.
Background technique
Exhaust valve rod is installed in the engine cylinder head, plays sealing and control exhaust, is the important spare part on the motor.The mounting type of existing exhaust valve rod is as shown in Figure 2; Valve guide bushing 2 is installed at the middle part of receiving hole 1a on cylinder head 1, valve seat 3 is installed in the bottom; Exhaust valve rod 4 passes from valve seat 3 and valve guide bushing 2 from lower to upper; Valve collet 5 is installed on top at exhaust valve rod 4, and the arc cam 5a of valve collet inwall snaps in the circular arc annular groove corresponding on the exhaust valve rod 4, the pocketed springs seat of honour, outside 6 of valve collet 5; Valve spring 7 lower ends that are sleeved on the exhaust valve rod 4 are spacing by the annular boss at valve guide bushing 2 middle parts, and the upper end is spacing by the spring seat of honour 6.The valve lash adjusting screw 8 that the control exhaust valve rod moves downward is installed on the rocking arm 9, by nut 12 lockings.When cam promotes rocking arm 9 around pitman arm shaft 11 is as shown in Figure 2 when clockwise rotating several angle; the valve lash adjusting screw 8 on the rocking arm 9 is depressed exhaust valve rod 4; exhaust valve rod 4 is moved downward with respect to cylinder head 1 together with the spring seat of honour 6, and valve spring 7 is compressed, and the conical surface of exhaust valve rod 4 bottoms leaves valve seat 3; exhaust valve is opened, and the waste gas that the motor acting produces is discharged from exhaust valve; After exhaust was accomplished, under the effect of valve spring 7 elastic force, exhaust valve rod 4 moved upward with respect to cylinder head 1 together with the spring seat of honour 6, makes the conical surface of exhaust valve rod 4 bottoms and valve seat seat close exhaust valve closing.Because temperature is unbalanced during the exhaust valve exhaust; Form " focus " at some position of valve seat 3 easily; " focus " seat that the same position of the exhaust valve rod 4 bottom conical surfaces is continuous and temperature is higher is fashionable, and " focus " just expanded on valve-face, and faults such as exhaust valve rod scaling loss take place.
For preventing exhaust valve rod conical surface local superheating; Exhaust valve rod needs automatically around its axis rotation at work, and exhaust valve rod conical surface neither one position repeatedly is combined on the same focus of valve seat the mutual wiping of the exhaust valve rod conical surface and valve seat like this; Help to prevent the combustion products deposition; Improve heat transfer condition, thereby can avoid exhaust valve rod, improve sealability by scaling loss; Simultaneously, exhaust valve rod rotation can also reduce the chance that sticking long-pending thing that its conical surface adheres to clings valve seat, ensure that exhaust valve rod is reciprocating to carry out smoothly, and make tapering, exhaust valve rod bottom the temperature trend evenly.
As shown in Figure 2; In the internal-combustion engine of existing structure; between the shaft axis of the shaft axis of valve lash adjusting screw 8 and exhaust valve rod 4 a little side-play amount is arranged on the rocking arm 9, about about 0.5mm, so each valve lash adjusting screw 8 is depressed exhaust valve rod 4; when making exhauxt valve opens greatly, and exhaust valve rod 4 all can take place to rotate slightly.The shortcoming of this structure is:
1, the bad control of side-play amount between valve lash adjusting screw shaft axis and the exhaust valve rod shaft axis, exhaust valve rod are not obvious around its axis rotation at work, and the exhaust valve rod conical surface still scaling loss can take place because of local superheating.
2, exist side-play amount can cause exhaust valve rod to receive side pressure between valve lash adjusting screw shaft axis and the exhaust valve rod shaft axis; Side-play amount is big more; The suffered side pressure of exhaust valve rod is just big more; Thereby make the bigger wearing and tearing of generation between exhaust valve rod and the valve guide bushing, can cause exhaust valve rod to rupture when serious, thereby shorten its working life.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of engine exhaust valve structure, effectively to prevent the exhaust valve rod local superheating, reduces the wearing and tearing between exhaust valve rod and the valve guide bushing.
Technological scheme of the present invention is following: a kind of engine exhaust valve structure; Valve guide bushing is installed at the middle part of receiving hole on cylinder head, valve seat is installed in the bottom; Exhaust valve rod passes from valve seat and valve guide bushing from lower to upper, on the top of exhaust valve rod valve collet, the mounting spring seat of honour, outside of valve collet is installed; The valve spring upper end that is sleeved on the exhaust valve rod is spacing by the spring seat of honour; The lower end is spacing by the annular boss at valve guide bushing middle part, above said exhaust valve rod top, is provided with valve lash adjusting screw, and this valve lash adjusting screw is installed on the rocking arm; Its key is: the shaft axis of said valve lash adjusting screw and the shaft axis of exhaust valve rod are point-blank; Between valve lash adjusting screw and exhaust valve rod, end cap is set, this end cap passes through the blind hole kink of its bottom on exhaust valve rod, has the gap between the end face on the bottom surface of said blind hole and exhaust valve rod top.
Adopt above technological scheme; The kink end cap on the top of exhaust valve rod promptly adopts Spielpassung between exhaust valve rod end and the end cap blind hole, rotates around pitman arm shaft when cam promotes rocking arm; during valve lash adjusting screw pressed downward on the rocking arm; valve lash adjusting screw is at first pushed down end cap, make valve collet with respect to exhaust valve rod do downwards trace move (because of the arc cam on the valve collet inwall more smaller than the circular arc annular groove on the exhaust valve rod that cooperates with it), valve collet and spring seat of honour compression valve spring subsequently; end cap moves to the bottom surface contact exhaust valve rod end face of blind hole; the promotion exhaust valve rod moves downward together with the spring seat of honour and valve collet, makes the conical surface of exhaust valve rod bottom leave valve seat, and exhaust valve is opened; When cam action after the power on the rocking arm fades away, under the effect of valve spring elastic force, exhaust valve rod moves upward together with the spring seat of honour and valve collet, makes the conical surface of exhaust valve rod bottom and valve seat seat close exhaust valve closing.In the moment of exhaust valve closing, owing to have the gap between the end face on bottom surface and the exhaust valve rod top of blind hole on the end cap, exhaust valve rod is in free state; The vibration of engine running generation will cause that exhaust valve rod rotates like this; And the rotating effect of exhaust valve rod is obvious, thereby can effectively prevent the exhaust valve rod local superheating, improves heat transfer condition; Avoid exhaust valve rod by scaling loss, improve its sealability; Simultaneously, the shaft axis of valve lash adjusting screw and the shaft axis of exhaust valve rod are point-blank compared with background technique; When valve lash adjusting screw was depressed exhaust valve rod at every turn, exhaust valve rod was just stressed on its shaft axis, can not receive side pressure again; Wearing and tearing between exhaust valve rod and the valve guide bushing reduce like this; The to-and-fro motion of exhaust valve rod can be carried out smoothly, has prevented that effectively exhaust valve rod from rupturing, and has prolonged its working life greatly.
Preferred scheme is that the bottom surface of above-mentioned end cap contacts with the end face of valve collet, has the gap of 0.05-0.1mm on the end cap between the end face on the bottom surface of blind hole and exhaust valve rod top.Gap between blind hole bottom surface and the exhaust valve rod end face is too small, and the bottom surface of end cap blind hole contacts with exhaust valve rod always, causes exhaust valve rod to rotate not obvious easily or changes motionless at all; Excesssive gap between blind hole bottom surface and the exhaust valve rod end face, then the end cap end face contacts with valve lash adjusting screw, the end cap bottom surface contacts with valve collet, also can cause exhaust valve rod to rotate not obvious or changes motionless at all.
Beneficial effect: the present invention can make exhaust valve rod rotate because of engine luggine in the moment of exhaust valve closing; The rotating effect of exhaust valve rod is obvious, can effectively prevent the exhaust valve rod local superheating, improves heat transfer condition; Avoid exhaust valve rod by scaling loss, improve its sealability; Exhaust valve rod is just stressed on its shaft axis at work, and the wearing and tearing between exhaust valve rod and the valve guide bushing reduce, and the to-and-fro motion of exhaust valve rod can be carried out smoothly, has prevented that effectively exhaust valve rod from rupturing, and has prolonged its working life greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of background technique.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
As shown in Figure 1, valve guide bushing 2 is installed at the middle part of receiving hole 1a on cylinder head 1, valve seat 3 is installed in the bottom, valve guide bushing 2 and valve seat 3 all with cylinder head 1 drive fit.Exhaust valve rod 4 passes from valve seat 3 and valve guide bushing 2 from lower to upper; Valve collet 5 is installed on top at exhaust valve rod 4; The arc cam 5a of valve collet 5 inwalls snaps in the circular arc annular groove corresponding on the exhaust valve rod 4, and arc cam 5a is more smaller than the circular arc annular groove that cooperates with it.At the pocketed springs seat of honour, the outside of valve collet 56, valve spring 7 upper ends that are sleeved on the exhaust valve rod 4 are spacing by the spring seat of honour 6, and the lower end is spacing by the annular boss at valve guide bushing 2 middle parts.The valve lash adjusting screw 8 that control exhaust valve rod 4 moves downward is installed in the end of rocking arm 9, and by nut 12 lockings, the middle part of rocking arm 9 is sleeved on the pitman arm shaft 11, and rocking arm 9 can rotate around pitman arm shaft 11.The shaft axis of the shaft axis of said valve lash adjusting screw 8 and exhaust valve rod 4 point-blank; Exhaust valve rod 4 is just stressed on its shaft axis at work like this; Wearing and tearing between exhaust valve rod 4 and the valve guide bushing 2 reduce; The to-and-fro motion of exhaust valve rod 4 can be carried out smoothly, has prevented that effectively exhaust valve rod 4 from rupturing.
From Fig. 1, further can know; Between valve lash adjusting screw 8 and exhaust valve rod 4, end cap 10 is set; The blind hole kink of this end cap 10 through its bottom on exhaust valve rod 4, i.e. Spielpassung between end cap 10 and the exhaust valve rod 4, the bottom surface of end cap 10 contacts with the end face of valve collet 5; Have gap L between the end face on the bottom surface of blind hole and exhaust valve rod 4 tops on the end cap 10, the size of this gap L is 0.05-0.1mm.Gap L is too small, and the bottom surface of end cap 10 blind holes contacts with exhaust valve rod 4 always, causes exhaust valve rod 4 to rotate not obvious easily or changes motionless at all; Gap L is excessive, and then end cap 10 end faces contact with valve lash adjusting screw 8, end cap 10 bottom surfaces contact with valve collet 5, also can cause exhaust valve rod to rotate not obvious or changes motionless at all.
Working principle of the present invention is following: when the cam (not shown) promotes rocking arm 9 around pitman arm shaft 11 as shown in Figure 1 clockwise rotating; When making valve lash adjusting screw 8 pressed downward on the rocking arm 9; Valve lash adjusting screw 8 is at first pushed down end cap 10, makes valve collet 5 do trace downwards with respect to exhaust valve rod 4 and moves, subsequently valve collet 5 and the spring seat of honour 6 compression valve springs 7; End cap 10 moves to bottom surface contact exhaust valve rod 4 end faces of blind hole; Promote exhaust valve rod 4 and move downward together with the spring seat of honour 6 and valve collet 5, make the conical surface of exhaust valve rod 4 bottoms leave valve seat 3, exhaust valve is opened; When cam action after the power on the rocking arm 9 disappears, under the effect of valve spring 7 elastic force, exhaust valve rod 4 moves upward together with the spring seat of honour 6 and valve collet 5, makes the conical surface of exhaust valve rod 4 bottoms and 3 of valve seats close exhaust valve closing.In the moment of exhaust valve closing; Owing to have the gap between the end face on the bottom surface of blind hole and exhaust valve rod 4 tops on the end cap 10; Exhaust valve rod 4 is in free state; The vibration of engine running generation will cause that exhaust valve rod 4 rotates, and effectively to prevent the exhaust valve rod local superheating, avoids exhaust valve rod by scaling loss like this.
Claims (1)
1. engine exhaust valve structure; Go up the middle part of receiving hole (1a) at cylinder head (1) valve guide bushing (2), bottom installation valve seat (3) are installed; Exhaust valve rod (4) passes from valve seat (3) and valve guide bushing (2) from lower to upper; Valve collet (5) is installed on top at exhaust valve rod (4), the mounting spring seat of honour, outside (6) of valve collet (5), and valve spring (7) upper end that is sleeved on the exhaust valve rod (4) is spacing by the spring seat of honour (6); The lower end is spacing by the annular boss at valve guide bushing (2) middle part; Top on said exhaust valve rod (4) top is provided with valve lash adjusting screw (8), and this valve lash adjusting screw (8) is installed on the rocking arm (9), it is characterized in that: the shaft axis of the shaft axis of said valve lash adjusting screw (8) and exhaust valve rod (4) point-blank; Between valve lash adjusting screw (8) and exhaust valve rod (4), end cap (10) is set; This end cap (10) passes through the blind hole kink of its bottom on exhaust valve rod (4), and the bottom surface of said end cap (10) contacts with the end face of valve collet (5), has the gap of 0.05-0.1mm between the bottom surface of the last blind hole of end cap (10) and the end face on exhaust valve rod (4) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100925074A CN101100952B (en) | 2007-08-01 | 2007-08-01 | Engine exhaust valve structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100925074A CN101100952B (en) | 2007-08-01 | 2007-08-01 | Engine exhaust valve structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101100952A CN101100952A (en) | 2008-01-09 |
| CN101100952B true CN101100952B (en) | 2012-08-22 |
Family
ID=39035382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100925074A Expired - Fee Related CN101100952B (en) | 2007-08-01 | 2007-08-01 | Engine exhaust valve structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101100952B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111433440A (en) * | 2017-12-04 | 2020-07-17 | 舍弗勒技术股份两合公司 | Rocker arm for a valve train of an internal combustion engine and method for producing an arm from sheet steel without cutting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234769A (en) * | 2014-08-30 | 2014-12-24 | 常州市海盈五金科技有限公司 | Automobile valve device |
-
2007
- 2007-08-01 CN CN2007100925074A patent/CN101100952B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111433440A (en) * | 2017-12-04 | 2020-07-17 | 舍弗勒技术股份两合公司 | Rocker arm for a valve train of an internal combustion engine and method for producing an arm from sheet steel without cutting |
| CN111433440B (en) * | 2017-12-04 | 2022-06-24 | 舍弗勒技术股份两合公司 | Rocker arm for a valve train of an internal combustion engine and method for producing an arm from sheet steel without cutting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101100952A (en) | 2008-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2012092693A1 (en) | Auxiliary valve actuating mechanism of engine | |
| JP4659842B2 (en) | Internal combustion engine equipment | |
| CN201074533Y (en) | Rotary device of engine exhaust door lever | |
| CN101100952B (en) | Engine exhaust valve structure | |
| CN201513209U (en) | Engine braking device with low manufacturing cost | |
| CN106089348B (en) | A kind of air valve bridge and the engine including the air valve bridge | |
| CN202001072U (en) | Cam device for adjusting air valve of engine | |
| CN101713308B (en) | Hydraulic valve mechanism of variable valve lift | |
| CN210396836U (en) | Electro-hydraulic control device for valve timing | |
| CN103161537B (en) | A kind of internal-combustion engine | |
| CN108301889A (en) | Engine exhaust valve structure | |
| CN202431318U (en) | Engine valve rocker | |
| CN102966391B (en) | Swinging arm mechanism controlled by using double cams | |
| CN100572764C (en) | A kind of variable valve gear of motor | |
| CN109026249A (en) | A kind of engine exhaust valve structure | |
| CN203669955U (en) | Device optimizing low-speed performance of internal combustion engine and device starting internal combustion engine | |
| CN201908696U (en) | Engine, air valve driving mechanism and guide pin thereof | |
| CN201236728Y (en) | Valve rocker of engine | |
| CN203547822U (en) | Internal brake of engine cylinder | |
| WO2011054249A1 (en) | Air distribution method of valve lift two-stage adjustment for automobile engine | |
| CN102588027A (en) | Valve component for four-valve diesel | |
| CN2755290Y (en) | Valve gap automatic adjuster of engine for motorcycle | |
| CN201228571Y (en) | Rotary ball valve acutating mechanism of four-stroke cycle engine | |
| CN110159382A (en) | A kind of electro-hydraulic regulation device of valve timing | |
| CN211038766U (en) | Valve mechanism and engine thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20210801 |