CN208089366U - A kind of six-cylinder diesel engine camshaft - Google Patents
A kind of six-cylinder diesel engine camshaft Download PDFInfo
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- CN208089366U CN208089366U CN201820460432.4U CN201820460432U CN208089366U CN 208089366 U CN208089366 U CN 208089366U CN 201820460432 U CN201820460432 U CN 201820460432U CN 208089366 U CN208089366 U CN 208089366U
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Abstract
The utility model discloses a kind of six-cylinder diesel engine camshafts, belong to parts and components of diesel engine technical field, including admission cam and exhaust cam, the admission cam is symmetrical structure, and the outer profile of the admission cam includes basic circle section, valve opening section, straightway and closing flank；Valve opening section includes that section is opened in the spiral of Archimedes transition set gradually, orthodrome opens section and small arc-shaped opens section, closing flank includes that the small arc-shaped set gradually closes section, orthodrome closes section and section is closed in spiral of Archimedes transition, the both ends of the basic circle section are separately connected the spiral of Archimedes transition and open section and spiral of Archimedes transition closing section, and the both ends of the straightway are separately connected the small arc-shaped and open section and small arc-shaped closing section；The exhaust cam is identical with the shape of the admission cam.The admission cam and exhaust cam profile design of the utility model are reasonable, meet diesel engine high power, low oil consumption performance requirement.
Description
Technical field
The utility model belongs to parts and components of diesel engine technical field more particularly to a kind of six-cylinder diesel engine camshaft.
Background technology
Camshaft is most important component in diesel engine air distribution system, and the structure of conventional cam shaft includes camshaft main body,
Camshaft main body is one and the comparable cylindrical axis body of air cylinder group length, is equipped on cylindrical axis body for driving valve
Admission cam and exhaust cam and be used for and the matched axle journal in body upper camshaft bearing hole.
The admission cam and exhaust cam profile design of traditional six-cylinder diesel engine camshaft are unreasonable, and valve is because of on-off action
In acceleration and deceleration process generate excessive excessive impact, cause valve to be seriously worn, noise increases, it is difficult to meet six-cylinder diesel engine
Requirement.
Utility model content
Technical problem to be solved in the utility model is：A kind of six-cylinder diesel engine camshaft is provided, it is existing to solve
The admission cam and exhaust cam profile design of six-cylinder diesel engine camshaft be unreasonable to cause valve to be seriously worn, noise increases,
The technical issues of being difficult to meet six-cylinder diesel engine requirement.
In order to solve the above technical problems, the technical solution of the utility model is：A kind of six-cylinder diesel engine camshaft, including axis
Body, the axis body are equipped with admission cam and exhaust cam, and the admission cam is symmetrical structure, the foreign steamer of the admission cam
Exterior feature includes basic circle section, valve opening section, straightway and closing flank；
The valve opening section includes that section is opened in the spiral of Archimedes transition set gradually, orthodrome opens section and small
Circular arc opens section, and the closing flank includes that the small arc-shaped set gradually closes section, orthodrome closes section and Archimedes's spiral shell
Section is closed in spin line transition, and the both ends of the basic circle section are separately connected the spiral of Archimedes transition and open section and the A Ji
Section is closed in Mead helix transition, and the both ends of the straightway are separately connected the small arc-shaped and open section and small arc-shaped closing
Section；
The exhaust cam is identical with the shape of the admission cam.
As an improvement the lift of the admission cam and the exhaust cam is 0-9.99992mm.
As an improvement a diameter of 39.6 ± 0.05mm of φ of the basic circle section, the center of circle of the basic circle section with it is described
The vertical range of straightway is 29.8mm.
As a further improvement, section and the spiral of Archimedes transition are opened in the spiral of Archimedes transition
It is 15 ° to close the corresponding angle of section, and the small arc-shaped opens the line between the center of circle and the center of circle of the basic circle section of section
For M1, line that the small arc-shaped is closed between the center of circle and the center of circle of the basic circle section of section be M2, the M1 and the M2 it
Between angle be 5 °, section is opened in the spiral of Archimedes transition and the orthodrome opens the intersection point of section and the basic circle section
The center of circle between line be M3, the angle between the M3 and the M1 is 62 °, and the spiral of Archimedes transition is closed
The line that section and the orthodrome are closed between the intersection point and the center of circle of the basic circle section of section is M4, between the M4 and the M2
Angle be 62 °.
As a further improvement, it is 6mm that the small arc-shaped, which opens section and the radius of small arc-shaped closing section, described
The line that small arc-shaped is opened between the center of circle of section and the center of circle of small arc-shaped closing section is M5, the center of circle of the basic circle section and institute
It is 23.8mm to state the vertical range between M5；Section is opened in the spiral of Archimedes transition and the orthodrome opens the friendship of section
The distance between point and the center of circle of the basic circle section are 20 ± 0.03mm.
As an improvement being additionally provided with the first axle journal, the second axle journal, third axle journal, the 4th axle journal, the 5th on the axis body
Axle journal, the 6th axle journal and the 7th axle journal are respectively equipped with oil on second axle journal, the 4th axle journal and the 6th axle journal
Slot.
As a further improvement, one end of the axis body is equipped with keyway, and the other end is equipped with exhaust oil guiding hole.
After using above-mentioned technical proposal, the utility model has the beneficial effects that：
Section and A Ji meter are opened since the admission cam and exhaust cam of camshaft devise spiral of Archimedes transition
Section is closed in moral helix transition, is smoothly opened and closed, is effectively prevented so that valve when opening and closing, is realized
Valve avoids valve wear, while can reduce noise by how excessive impact；Admission cam due to camshaft and row
Gas cam devises that orthodrome opens section, small arc-shaped opens section, small arc-shaped closes section and orthodrome and closes section, hereby it is ensured that gas
The speed and ride comfort that door opens and closes；Since straightway has also been devised in the admission cam and exhaust cam of camshaft, make
It obtains valve and is opening maximum holding, intake efficiency can be improved in this way, meet the performance requirement of diesel engine.
The admission cam and exhaust cam profile design of six-cylinder diesel engine camshaft provided by the utility model are reasonable, meet
Diesel engine high power, low oil consumption performance requirement, the cam profile is through using verification that valve train noise can be made small, using can
It leans on.
Description of the drawings
Fig. 1 is the structural schematic diagram for the six-cylinder diesel engine camshaft that the utility model embodiment provides；
Fig. 2 and Fig. 3 is A-A cutaway view Amplified images in Fig. 1；
Fig. 4 is B-B cutaway view Amplified images in Fig. 1；
Fig. 5 is the valve timing figure of the utility model；
In figure：1- axis bodies, 2- admission cams, 21- basic circle sections, 22- valve opening sections, 221- spiral of Archimedes transition
Section is opened, 222- orthodromes open section, and 223- small arc-shapeds open section, 23- straightways, 24- closing flanks, 241- small arc-shapeds pass
Section is closed, 242- orthodromes close section, and section, 3- exhaust cams, the first axle journals of 41-, 42- are closed in 243- spiral of Archimedes transition
Second axle journal, 43- third axle journals, the 4th axle journals of 44-, the 5th axle journals of 45-, the 6th axle journals of 46-, the 7th axle journals of 47-, 5- oil grooves,
6- keyways, 7- are vented oil guiding hole；
Hollow arrow represents the direction of rotation of camshaft in Fig. 2, Fig. 3, Fig. 4 and Fig. 5.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Common shown as shown in Figure 1 to Figure 4, a kind of six-cylinder diesel engine camshaft, including axis body 1, axis body 1 are equipped with admission cam
2 and exhaust cam 3, admission cam 2 is symmetrical structure, the outer profile of admission cam 2 include basic circle section 21, valve opening section 22,
Straightway 23 and closing flank 24.
Valve opening section 22 includes that section 221 is opened in the spiral of Archimedes transition set gradually, orthodrome opens section 222
Section 223 is opened with small arc-shaped, closing flank 24 includes that the small arc-shaped set gradually closes section 241, orthodrome closes 242 and of section
Section 243 is closed in spiral of Archimedes transition, and the both ends of basic circle section 21 are separately connected spiral of Archimedes transition and open section 221
Section 243 is closed with spiral of Archimedes transition, the both ends of straightway 23 are separately connected small arc-shaped and open section 223 and small arc-shaped pass
Close section 241；
Exhaust cam 3 is identical with the shape of admission cam 2.
In this way, opening section and spiral of Archimedes transition closing section by spiral of Archimedes transition so that valve
When opening and closing, realizes and smoothly open and close, effectively prevent valve by how excessive impact, avoid gas
Door abrasion, while noise can be reduced；Section is opened by orthodrome, small arc-shaped opens section, small arc-shaped closes section and orthodrome is closed
Section, ensure that the speed and ride comfort of valve opening and closing, passes through straightway so that and valve is opening maximum holding,
Intake efficiency can be improved in this way, meet the performance requirement of diesel engine.
In conjunction with Fig. 2 and Fig. 3, the diameter D of basic circle section 21 is 39.6 ± 0.05mm of φ, the center of circle and the straightway 23 of basic circle section 21
Vertical range L1 be 29.8mm.
Section 221 is opened in spiral of Archimedes transition and 243 corresponding angle of section is closed in spiral of Archimedes transition
It is 15 ° to spend α, and it is M1 that small arc-shaped, which opens the line between the center of circle and the center of circle of basic circle section 21 of section 223, and small arc-shaped closes section 241
The center of circle and the center of circle of basic circle section 21 between line be M2, angle β between M1 and M2 is 5 °, spiral of Archimedes transition
The line opened between section 221 and the intersection point and the center of circle of basic circle section 21 of orthodrome unlatching section 222 is M3, the folder between M3 and M1
Angle γ is 62 °, and the center of circle of the intersection point and basic circle section 21 of section 243 and orthodrome closing section 242 is closed in spiral of Archimedes transition
Between line be M4, angle δ between M4 and M2 is 62 °.
It is 6mm that small arc-shaped, which opens section 223 and the radius R of small arc-shaped closing section 241, and small arc-shaped opens the center of circle of section 223
Line between the center of circle of small arc-shaped closing section 241 is M5, and the vertical range L2 between the center of circle and M5 of basic circle section 21 is
23.8mm；Spiral of Archimedes transition is opened between section 221 and the intersection point and the center of circle of basic circle section 21 of orthodrome unlatching section 222
Distance L3 be 20 ± 0.03mm.
The lift of admission cam 2 and exhaust cam 3 is 0-9.99992mm.
The utility model embodiment additionally provides the phase angle of admission cam 2 and the lift table of cam lift height, such as table
Shown in one.
Table one
The phase angle of exhaust cam 3 and the lift table of cam lift height, as shown in Table 2.
Table two
As shown in Figure 1, being additionally provided with the first axle journal 41, the second axle journal 42, third axle journal 43, the 4th axle journal 44, on axis body 1
Five axle journals 45, the 6th axle journal 46 and the 7th axle journal 47, lubricate and heat dissipation for convenience, the second axle journal 42, the 4th axle journal 44 and the
It is respectively equipped with oil groove 5 on six axle journals 46.
One end of driving wheel in order to facilitate the installation of, axis body 1 is equipped with keyway 6；In order to facilitate exhaust and Oil Guide, axis body 1 it is another
One end is equipped with exhaust oil guiding hole 7.
It is illustrated in figure 5 the valve timing figure of the utility model, valve timing is the practical opening and closing moment of inlet and outlet door,
Usually indicated with the circular chart of the crank angle relative to upper and lower stop crank throw position.Inlet valve reaches top dead centre in piston
30 ° of unlatchings in the past, 48 ° of closings after crossing lower dead center to piston, therefore air inlet total angle is 258 °；Exhaust valve is reached in piston
48 ° of unlatchings before bottom dead center, 30 ° of closings after crossing top dead centre to piston, therefore it is 258 ° to be vented total angle.
The admission cam and exhaust cam profile design of six-cylinder diesel engine camshaft provided by the utility model are reasonable, meet
Diesel engine high power, low oil consumption performance requirement, the cam profile is through using verification that valve train noise can be made small, using can
It leans on.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (7)
1. a kind of six-cylinder diesel engine camshaft, including axis body, the axis body is equipped with admission cam and exhaust cam, and feature exists
In, the admission cam be symmetrical structure, the outer profile of the admission cam include basic circle section, valve opening section, straightway and
Closing flank；
The valve opening section includes that section is opened in the spiral of Archimedes transition set gradually, orthodrome opens section and small arc-shaped
Section is opened, the closing flank includes that the small arc-shaped set gradually closes section, orthodrome closes section and spiral of Archimedes
Section is closed in transition, and the both ends of the basic circle section are separately connected the spiral of Archimedes transition and open section and the Archimedes
Section is closed in helix transition, and the both ends of the straightway are separately connected the small arc-shaped and open section and small arc-shaped closing section；
The exhaust cam is identical with the shape of the admission cam.
2. six-cylinder diesel engine camshaft according to claim 1, which is characterized in that the admission cam and the exhaust are convex
The lift of wheel is 0-9.99992mm.
3. six-cylinder diesel engine camshaft according to claim 1, which is characterized in that a diameter of φ 39.6 of the basic circle section
± 0.05mm, the center of circle of the basic circle section are 29.8mm with the vertical range of the straightway.
4. six-cylinder diesel engine camshaft according to claim 3, which is characterized in that the spiral of Archimedes transition is opened
It is 15 ° to open section and the corresponding angle of spiral of Archimedes transition closing section, and the small arc-shaped opens the center of circle of section
Line between the center of circle of the basic circle section is M1, and the small arc-shaped is closed between the center of circle and the center of circle of the basic circle section of section
Line be M2, the angle between the M1 and the M2 is 5 °, and section and described big is opened in the spiral of Archimedes transition
It is M3 that circular arc, which opens the line between the intersection point and the center of circle of the basic circle section of section, and the angle between the M3 and the M1 is
62 °, section is closed in the spiral of Archimedes transition and the orthodrome close the intersection point of section and the basic circle section the center of circle it
Between line be M4, the angle between the M4 and the M2 is 62 °.
5. six-cylinder diesel engine camshaft according to claim 4, which is characterized in that the small arc-shaped opens section and described small
The radius that circular arc closes section is 6mm, and the small arc-shaped opens the center of circle of section and the small arc-shaped is closed between the center of circle of section
Line is M5, and the vertical range between the center of circle and the M5 of the basic circle section is 23.8mm；The spiral of Archimedes mistake
It is 20 ± 0.03mm to cross and open the intersection point of section and orthodrome unlatching section and the distance between the center of circle of the basic circle section.
6. six-cylinder diesel engine camshaft according to any one of claim 1 to 5, which is characterized in that on the axis body also
Equipped with the first axle journal, the second axle journal, third axle journal, the 4th axle journal, the 5th axle journal, the 6th axle journal and the 7th axle journal, described second
It is respectively equipped with oil groove on axle journal, the 4th axle journal and the 6th axle journal.
7. six-cylinder diesel engine camshaft according to claim 6, which is characterized in that one end of the axis body is equipped with keyway,
The other end is equipped with exhaust oil guiding hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460432.4U CN208089366U (en) | 2018-04-02 | 2018-04-02 | A kind of six-cylinder diesel engine camshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820460432.4U CN208089366U (en) | 2018-04-02 | 2018-04-02 | A kind of six-cylinder diesel engine camshaft |
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| Publication Number | Publication Date |
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| CN208089366U true CN208089366U (en) | 2018-11-13 |
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| CN201820460432.4U Active CN208089366U (en) | 2018-04-02 | 2018-04-02 | A kind of six-cylinder diesel engine camshaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263483A (en) * | 2022-07-01 | 2022-11-01 | 奇瑞汽车股份有限公司 | Cam, camshaft and engine |
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2018
- 2018-04-02 CN CN201820460432.4U patent/CN208089366U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263483A (en) * | 2022-07-01 | 2022-11-01 | 奇瑞汽车股份有限公司 | Cam, camshaft and engine |
| CN115263483B (en) * | 2022-07-01 | 2024-03-26 | 奇瑞汽车股份有限公司 | Cam, cam shaft and engine |
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