CN204082240U - A kind of engine valve system layout - Google Patents
A kind of engine valve system layout Download PDFInfo
- Publication number
- CN204082240U CN204082240U CN201420536378.9U CN201420536378U CN204082240U CN 204082240 U CN204082240 U CN 204082240U CN 201420536378 U CN201420536378 U CN 201420536378U CN 204082240 U CN204082240 U CN 204082240U
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- valve
- tappet
- described valve
- spring
- cam
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Abstract
The utility model provides a kind of engine valve system layout, comprise camshaft, valve tappet, valve spring, valve, cam on described camshaft is by valve tappet described in rotating down pressing, described valve tappet presses down described valve, described valve spring provides restoring force for described valve, and the pressure spot of described cam on the end face of described valve tappet departs from the axis of described valve.The utility model can drive valve rotation with simple structure.
Description
Technical field
The utility model relates to engine art, is specifically related to engine valve system layout.
Background technique
Engine valve rotates around the axis of self in switching process, can make valve and air valve seat ring, valve guide bushing uniform wear, grind mutually, eliminate the carbon deposit between them, prevent " gas leakage ", " stuck " phenomenon.Valve rotates around the axis of self in switching process, valve also can be made to be heated equably, to dispel the heat, prevent valve retainer " distortion ", " sticking up in the wrong ", extends service life more than 3 times.
Available engine many employings hydraulic rocker, rocking arm is directly pressed in valve top, and camshaft controls the unlatching of valve by rocking arm, not easily realizes the rotation of valve.Being more prone to for making valve rotate, the mechanisms such as gear, crank, motor generally can be adopted to provide external force for valve, but this significantly can increasing motor complexity, and too much mechanism easily causes problems such as valve is synchronous, engine damage.
Model utility content
The purpose of this utility model be to provide a kind of with simple structure to drive the engine valve system layout of valve rotation.
For achieving the above object, embodiment of the present utility model provides following technological scheme:
A kind of engine valve system layout, comprise camshaft, valve tappet, valve spring, valve, cam on described camshaft is by valve tappet described in rotating down pressing, described valve tappet presses down described valve, described valve spring provides restoring force for described valve, and the pressure spot of described cam on the end face of described valve tappet departs from the axis of described valve.
Preferably, above-mentioned engine valve system layout also comprises spring locker and spring seat, and described spring seat is locked on described valve by described spring locker, and bottom surface and the described valve top of described valve tappet form friction pair.
Preferably, the end face of described valve tappet is spherical.
Preferably, described pressure spot departs from the ratio between the distance of the axis of described valve and described spherical radius is 1:72000 to 5:72000.
Preferably, described pressure spot departs from the ratio between the distance of the axis of described valve and described spherical radius is 1.5:72000.
Preferably, above-mentioned engine valve system layout also comprises valve oil seal, and the liquid that described valve oil seal realizes between described valve and cylinder is closed.
The utility model is biased by the axis of the pressure spot of cam on the end face of valve tappet and valve, while making cam press valve tappet under rotation, for valve tappet provides the frictional force departing from the valve tappet center of circle, under the effect of this friction torque, valve tappet rotates around himself axis, thus drive valve to rotate around himself axis, need not again for valve provides other boosting mechanism.
Further, bottom surface and the valve top of valve tappet form friction pair, drive valve rotation with the frictional force of valve tappet, and allow when vibrating excessive overcome friction between valve and valve tappet to produce relative sliding, thus avoid causing damage to valve.
Further, the spherical form of the end face of valve tappet makes can realize point cantact but not linear contact lay between cam and valve tappet, thus reduces between cam and valve tappet owing to the frictional loss that reason causes such as to vibrate.
Further, the selection of the ratio between the deviation distance of pressure spot and spherical radius makes camshaft when rotated, both cam can not have been caused too little and cannot drive valve to the friction torque of valve tappet, and when cam also can not be caused to press down, turning torque is excessive causes valve wear.
Accompanying drawing explanation
Next will be described in further detail specific embodiment of the utility model by reference to the accompanying drawings, wherein:
Fig. 1 is the sectional view of the engine valve system layout of embodiment of the present utility model;
Fig. 2 is the sectional view along the K-K line in Fig. 1;
Fig. 3 is the sectional view of the valve tappet of embodiment of the present utility model;
Fig. 4 is the plan view of the valve tappet of embodiment of the present utility model.
Description of symbols in upper figure: 1, cylinder cap, 2, camshaft, 3, camshaft-bearing cap, 4, valve tappet, 5, spring seat, 6, locker, 7, spring, 8, valve oil seal, 9, valve, 10, valve guide bushing, 30, cam centre line, 40, axis, 41, end face, 42, bottom surface.
Embodiment
With reference to figure 1, the engine valve system layout of the present embodiment mainly comprises camshaft 2, valve tappet 4, valve spring 7 and valve 9 etc.Camshaft 2 relies on camshaft-bearing cap 3 to be arranged on the cylinder cap 1 of cylinder, and can rotate.Valve 9 can slide in valve guide bushing 10, certainly, also exists without valve guide bushing structure in prior art, cylinder cap 1 directly casts out boss and replaces valve guide bushing 10.Spring seat 5 is locked on valve 9 by spring locker 6, spring seat 5 is installed valve spring 7, and the lower end abutment of valve spring 7 is on cylinder cap 1, and valve tappet 4 is pressed on valve 9 again.Cam on camshaft 2 is directly pressed on valve tappet 4 and valve spring 7 exists pretightening force, when the cam on camshaft 2 rotates, in valve 9 opening procedure, cam on camshaft 2 presses down valve tappet 4, then valve tappet 4 presses down valve 9, and valve spring 7 is compressed, in valve 9 closing process, valve spring 7 provides restoring force to make valve 9 increase for valve 9.Valve oil seal 8 is arranged between valve 9 and valve guide bushing 10, for realizing the hydraulic seal between valve 9 and cylinder, avoids the lubricant oil in valve guide bushing 10 to spray.
Composition graphs 2 and Fig. 4, the axis 40 of valve 9 does not overlap with the center line 30 of the cam on camshaft 2, but departs from a segment distance D.In the plan view of Fig. 4, due to the axis of valve tappet 4 and the dead in line of valve 9, therefore axis 40 becomes the center of circle 40 of valve tappet 4, and the center line 30 of cam becomes the pressure spot of cam on the end face 41 of valve tappet 4.More high-visible from Fig. 4, due to the existence of deviation distance D, cam on camshaft 2 is in rotary course, while giving valve tappet 4 one down pressures, also for valve tappet provides a frictional force F departing from the valve tappet center of circle 40, this friction F creates a moment F × D to valve tappet 4, under the effect of this moment, valve tappet 4 can rotate around himself axis 40, and the bottom surface 42 of valve tappet 4 and the top of valve 9 form friction pair, thus drive valve 9 to rotate around himself axis 40, need not again for valve provides other boosting mechanism.Those of ordinary skill in the art can imagine, rely between valve 9 with valve tappet 4 to be fixedly connected with and also can realize valve tappet 4 and drive valve 9 to rotate, but friction pair allow when engine luggine is excessive between valve 9 and valve tappet 4 overcome friction produce relative sliding, thus avoid causing damage to valve 9, therefore there is advantage.
With reference to figure 3, the end face 41 of valve tappet 4 is not a plane, but be spherical, this spherical form to make between cam and valve tappet 4 can realize point cantact but not linear contact lay in section in fig. 2, thus reduces between cam and valve tappet 4 owing to the frictional loss that reason causes such as to vibrate.Spherical radius SR is 72000mm in the present embodiment, and the distance D that pressure spot 30 departs from the axis 40 of valve 9 is 1mm to 5mm, that is, pressure spot 30 depart from the distance D of the axis 40 of valve 9 and the spherical end face 41 of valve tappet 4 radius SR between ratio be 1:72000 to 5:72000.The reason of this ratio range is selected to be: to suppose that SR is that 72000mm is constant, if D continues to reduce, then the upset moment of torsion that produces relative to the center of circle 40 downforce that valve tappet 4 applies of cam is less, more be not easy to make valve tappet 4 and valve 9 produce upset, this is favourable one side, but the running torque that also frictional force F can be made to produce diminishes simultaneously, be unfavorable for driving valve tappet 4 and valve 9 to rotate, this is disadvantageous one side; And if D continues to increase, then the upset moment of torsion that produces relative to the center of circle 40 downforce that valve tappet 4 applies of cam is larger, more easily make valve tappet 4 and valve 9 produce upset and accelerate abrasion, this is disadvantageous one side, but the running torque that frictional force F also can be made to produce becomes large simultaneously, be conducive to driving valve tappet 4 and valve 9 to rotate, this is favourable one side.And the ratio of D:SR is set between 1:72000 to 5:72000, both ensure that valve tappet 4 and valve 9 can be subject to enough running torque effects, ensure that again the turning torque that downforce causes is controlled in the heavy wear that can not cause valve 9 in acceptable scope, therefore be suitable, most preferably this ratio is 1.5:72000.
Although the utility model is described in conjunction with above embodiment, but the utility model is not limited to above-described embodiment, and only by the restriction of claim, those of ordinary skill in the art can easily modify to above-described embodiment and change, but do not leave essential idea of the present utility model and scope.
Claims (6)
1. an engine valve system layout, comprise camshaft, valve tappet, valve spring, valve, cam on described camshaft is by valve tappet described in rotating down pressing, described valve tappet presses down described valve, described valve spring provides restoring force for described valve, it is characterized in that, the pressure spot of described cam on the end face of described valve tappet departs from the axis of described valve.
2. engine valve system according to claim 1 layout, it is characterized in that, also comprise spring locker and spring seat, described spring seat is locked on described valve by described spring locker, and bottom surface and the described valve top of described valve tappet form friction pair.
3. engine valve system according to claim 1 layout, is characterized in that, the end face of described valve tappet is spherical.
4. engine valve system according to claim 3 layout, is characterized in that, the described pressure spot ratio departed between the distance of the axis of described valve and described spherical radius is 1:72000 to 5:72000.
5. engine valve system according to claim 4 layout, is characterized in that, the described pressure spot ratio departed between the distance of the axis of described valve and described spherical radius is 1.5:72000.
6. engine valve system according to claim 1 layout, is characterized in that, also comprise valve oil seal, and the liquid that described valve oil seal realizes between described valve and cylinder is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536378.9U CN204082240U (en) | 2014-09-17 | 2014-09-17 | A kind of engine valve system layout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536378.9U CN204082240U (en) | 2014-09-17 | 2014-09-17 | A kind of engine valve system layout |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204082240U true CN204082240U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420536378.9U Expired - Fee Related CN204082240U (en) | 2014-09-17 | 2014-09-17 | A kind of engine valve system layout |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204082240U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265391A (en) * | 2014-09-17 | 2015-01-07 | 安徽江淮汽车股份有限公司 | Valve arrangement structure of engine |
-
2014
- 2014-09-17 CN CN201420536378.9U patent/CN204082240U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265391A (en) * | 2014-09-17 | 2015-01-07 | 安徽江淮汽车股份有限公司 | Valve arrangement structure of engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20190917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |