CN203614148U - Diesel engine cam shaft - Google Patents
Diesel engine cam shaft Download PDFInfo
- Publication number
- CN203614148U CN203614148U CN201320880358.9U CN201320880358U CN203614148U CN 203614148 U CN203614148 U CN 203614148U CN 201320880358 U CN201320880358 U CN 201320880358U CN 203614148 U CN203614148 U CN 203614148U
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- China
- Prior art keywords
- cam
- cam shaft
- camshaft
- diesel engine
- shaft
- 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 - Lifetime
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- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000013011 mating Effects 0.000 claims description 3
- 210000003739 neck Anatomy 0.000 abstract 4
- 238000005452 bending Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000001138 tear Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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Abstract
The utility model provides a diesel engine cam shaft, comprising a can shaft body; shaft necks, an air inlet cam and an exhaust cam are arranged on the cam shaft body; seven shaft necks are arranged on the cam shaft body in sequence along the axial direction of the cam shaft body; the first shaft neck is formed by sequentially connecting a cylinder with a round table; the taper angle of the round table is 0.068 degrees; the small-head end of the round table is the front end of the cam shaft, and due to the structural mode, the phenomenon that as the cam shaft is bent, a bearing of the first cam shaft falls off and the shaft neck of the first cam shaft is worn is avoided. The outer circumferential surfaces of the air inlet cam and the exhaust cam are both arc surface structures with the radian of 0.002; the stressed areas of the cams and a tappet can be reduced by the arc surface structures, the motion is smoother, and the friction loss between the cams and the tappet is reduced.
Description
Technical field
The utility model relates to a kind of camshaft, especially a kind of cam shaft for diesel engine.
Background technique
At present, the fitting surface of the bearing hole of the camshaft of diesel engine, cam shaft bush and installation cam shaft bush all adopts cylindrical surface structure.Due to the load maximum of camshaft front end, when the engagement of diesel engine running camshaft gear wheel, camshaft front end can produce bending force, thereby causes the bearing of first camshaft to come off and the first journal wear of camshaft.While running due to camshaft, and can produce certain frictional force between camshaft bearing, so, just need to there be enough oil lubrication camshaft bearing journal and camshaft bearing, to reduce load and to reduce wearing and tearing, if lubricant oil deficiency, will cause the wearing and tearing of camshaft bearing journal, thereby has reduced the working life of camshaft.In addition, the intake cam on camshaft and the end face of exhaust cam are cylindrical structural, and the lifting surface area of camshaft and tappet is larger, thereby has strengthened the frictional loss of camshaft and tappet, the existing deficiency of prior art that Here it is.
Model utility content
The technical problems to be solved in the utility model, is exactly for the existing deficiency of prior art, and provides a kind of deterioration little cam shaft for diesel engine.
This programme is achieved by the following technical measures: this cam shaft for diesel engine comprises camshaft body, on described camshaft body, be provided with axle journal, intake cam and exhaust cam, on described camshaft body, be disposed with seven road axle journals along its axial direction, wherein, first axle journal is that the cylinder and the round platform that join in turn form, the cone angle of described round platform is 0.068 °, the front end that the little head end of round platform is camshaft, the outer peripheral surface of described intake cam and exhaust cam is globoidal structure, and the radian of this cambered surface is 0.002.
In above-mentioned seven road axle journals, on the outer peripheral surface of tri-road axle journals, Wu road axle journal He seven road axle journals, be processed with oil storage tank, with camshaft lubrication bearing, thus the load of reduction camshaft bearing.
In order to keep good lubrication effect, the width of getting above-mentioned oil storage tank is 3.6mm.
The structure of above-mentioned intake cam and exhaust cam is identical.
Above-mentioned first axle journal outside is set with cylindrical cam muff, cam shaft bush is arranged in the cylinder-shaped bearing hole of mating with it, the respective outer side edges of this structure and first axle journal can prevent from causing camshaft and bearing wear owing to producing excessive friction between camshaft and bearing after using.
The beneficial effect of this programme can be learnt according to the narration to such scheme, in this cam shaft for diesel engine, on its camshaft body, be disposed with seven road axle journals along its axial direction, wherein, first axle journal is that the cylinder and the round platform that join in turn form, the cone angle of described round platform is 0.068 °, the front end that the little head end of round platform is camshaft, and this structural type can prevent causing first camshaft bearing to come off because camshaft is bending and the phenomenon of first camshaft bearing journal wearing and tearing.The outer peripheral surface of intake cam and exhaust cam is globoidal structure, and the radian of this cambered surface is 0.002, and this globoidal structure can make the lifting surface area of cam and tappet reduce, and moves more level and smooth, thereby reduces the frictional loss of cam and tappet.As can be seen here, the utility model compared with prior art, has substantive distinguishing features and progress, and the beneficial effect of its enforcement is also apparent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the partial structurtes schematic diagram of first axle journal in Fig. 1.
Fig. 3 is the partial enlarged drawing of Fig. 1 cam.
In figure, 1-camshaft body, 2-first axle journal, 3-exhaust cam, 4-intake cam, 5-oil storage tank, 6-tri-road axle journals, 7-five road axle journals, 8-seven road axle journals, 9-bearing hole, 10-cam shaft bush.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, this programme is set forth.
A kind of cam shaft for diesel engine, as shown in Figure 1, it comprises camshaft body 1, is provided with axle journal, intake cam 4 and exhaust cam 3 on described camshaft body 1, intake cam 4 is identical with the structure of exhaust cam 3.On described camshaft body 1, be disposed with seven road axle journals along its axial direction.Wherein, as shown in Figure 2, cylinder and the round platform formation of first axle journal 2 for joining in turn, the cone angle of described round platform is 0.068 °, the front end that the little head end of round platform is camshaft, first axle journal 2 outsides are set with cylindrical cam muff 10, cam shaft bush 10 is arranged in the cylinder-shaped bearing hole 9 of mating with it, due to the load maximum of camshaft front end, when diesel engine running, can produce bending, adopt this structure can prevent from causing because camshaft is bending the phenomenon that first camshaft bearing comes off and first axle journal 2 weares and teares, and can prevent from causing camshaft and bearing wear owing to producing excessive friction between camshaft and bearing.As shown in Figure 3, the outer peripheral surface of intake cam 4 and exhaust cam 3 is globoidal structure, the radian of this cambered surface is 0.002, the lifting surface area of cam and tappet is reduced, move more level and smooth, thereby reduce the frictional loss of cam and tappet, can prevent because excessive cam and the tappet of causing of frictional loss of cam and tappet weares and teares.
Wherein, in seven road axle journals, on the outer peripheral surface of tri-road axle journals 6, Wu road axle journal 7 He seven road axle journals 8, be processed with oil storage tank 5, the width of oil storage tank 5 is 3.6mm, the interior storage lubricant oil of oil storage tank 5, by oil lubrication camshaft bearing, thereby reduce camshaft bearing load.
In the utility model, can pass through or adopt existing techniques in realizing without the technical characteristics of describing; do not repeat them here; certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned mode of execution; variation, remodeling, interpolation or replacement that those of ordinary skill in the art makes in essential scope of the present utility model, also should belong to protection domain of the present utility model.
Claims (5)
1. a cam shaft for diesel engine, it comprises camshaft body, on described camshaft body, be provided with axle journal, intake cam and exhaust cam, it is characterized in that: on described camshaft body, be disposed with seven road axle journals along its axial direction, wherein, first axle journal is that the cylinder and the round platform that join in turn form, the cone angle of described round platform is 0.068 °, the front end that the little head end of round platform is camshaft, the outer peripheral surface of described intake cam and exhaust cam is globoidal structure, and the radian of this cambered surface is 0.002.
2. cam shaft for diesel engine according to claim 1, is characterized in that: in described seven road axle journals, on the outer peripheral surface of tri-road axle journals, Wu road axle journal He seven road axle journals, be processed with oil storage tank.
3. cam shaft for diesel engine according to claim 2, is characterized in that: the width of described oil storage tank is 3.6mm.
4. according to the cam shaft for diesel engine described in claim 1,2 or 3, it is characterized in that: the structure of described intake cam and exhaust cam is identical.
5. according to the cam shaft for diesel engine described in claim 1,2 or 3, it is characterized in that: described first axle journal outside is set with cylindrical cam muff, and cam shaft bush is arranged in the cylinder-shaped bearing hole of mating with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880358.9U CN203614148U (en) | 2013-12-30 | 2013-12-30 | Diesel engine cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880358.9U CN203614148U (en) | 2013-12-30 | 2013-12-30 | Diesel engine cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614148U true CN203614148U (en) | 2014-05-28 |
Family
ID=50766799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320880358.9U Expired - Lifetime CN203614148U (en) | 2013-12-30 | 2013-12-30 | Diesel engine cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614148U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775863A (en) * | 2014-12-22 | 2015-07-15 | 亚新科凸轮轴（仪征）有限公司 | Main journal surface structure for camshaft of internal combustion engine |
| CN111980771A (en) * | 2020-09-30 | 2020-11-24 | 广西玉柴机器股份有限公司 | Camshaft structure |
-
2013
- 2013-12-30 CN CN201320880358.9U patent/CN203614148U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775863A (en) * | 2014-12-22 | 2015-07-15 | 亚新科凸轮轴（仪征）有限公司 | Main journal surface structure for camshaft of internal combustion engine |
| CN111980771A (en) * | 2020-09-30 | 2020-11-24 | 广西玉柴机器股份有限公司 | Camshaft structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |