CN202866917U - Cam shaft - Google Patents
Cam shaft Download PDFInfo
- Publication number
- CN202866917U CN202866917U CN 201220527109 CN201220527109U CN202866917U CN 202866917 U CN202866917 U CN 202866917U CN 201220527109 CN201220527109 CN 201220527109 CN 201220527109 U CN201220527109 U CN 201220527109U CN 202866917 U CN202866917 U CN 202866917U
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- CN
- China
- Prior art keywords
- oil pump
- section
- driving
- cam
- valve actuation
- 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
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- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model provides a cam shaft which aims to overcome the defect that an cam shaft in the prior art can not completely meet the demands of driving a combustion engine valve and a high-pressure oil pump at the same time and achieve the purpose of driving the combustion engine valve and the high-pressure oil pump at the same time. The cam shaft comprises a shaft body, the shaft body comprises a valve driving section and an oil pump driving section, wherein the valve driving section and the oil pump driving section are connected in a coaxial mode, the valve driving section is provided with a valve driving cam, and the oil pump driving section is provided with an oil pump driving cam. The cam shaft has the advantages of meeting the demands of driving the combustion engine valve and the high-pressure oil pump at the same time, an Oldham coupling is used for compensating relative displacement of the two sections of the shaft body, and therefore work stability can be guaranteed.
Description
Technical field
The utility model relates to a kind of internal combustion engine valve driver, relates in particular to a kind of internal combustion (IC) engine camshaft.
Background technique
Internal combustion (IC) engine camshaft is widely used in the automobile power field, mainly plays the effect that drives engine valve, and along with the application of gasoline in-cylinder direct injection technology, camshaft is gone back the high pressure oil pump of demand motive direct spray petrol engine in cylinder except driving the valve.When single driving engine valve, require camshaft to have good wear resistance and resistance to marring; And when driving high pressure oil pump, camshaft need to bear very high contact stress, needs camshaft to have very high contact fatigue strength.Therefore, existing camshaft existence can not take into account the deficiency that drives simultaneously engine valve and high pressure oil pump requirement fully.
Chinese patent notice of authorization number: CN 202348359U, notice of authorization day: on July 25th, 2012, disclose a kind of camshaft.This camshaft comprises: exhaust cam and intake cam, and the support axle journal between exhaust cam and intake cam, support on the axle journal and offer circumferential annular oil groove.Because lubricant oil supports lubricated to cam and tappet of annular oil groove on the axle journal by camshaft, has improved radiating effect, the wearing and tearing of minimizing tappet working surface.Although the wear-resisting property when having strengthened the camshaft actuated engine valve can't be taken into account the deficiency that drives simultaneously engine valve and high pressure oil pump requirement but still exist.
The model utility content
The utility model is can not take into account the deficiency that drives simultaneously engine valve and high pressure oil pump requirement fully in order to overcome prior art convexity wheel shaft, provides a kind of and can satisfy a kind of camshaft that drives simultaneously engine valve and high pressure oil pump requirement.
For achieving the above object, the utility model is by the following technical solutions:
A kind of camshaft of the present utility model comprises axis body, and axis body comprises that the valve actuation section of coaxial connection and oil pump drive section, and the valve actuation section is provided with the valve actuation cam, and oil pump drives section and is provided with the oil pump driving cam.Axis body is divided into two sections coaxial connections, and the valve actuation section is used wear resistance and the strong material of resistance to marring that is fit to drive engine valve, and oil pump driving section is used the high material of contact fatigue strength.Thereby realize that camshaft satisfies the requirement that drives simultaneously engine valve and high pressure oil pump.
As preferably, described valve actuation section is used chilled cast iron.Chilled cast iron has low cost, high-performance, and good wear resistance and resistance to marring are particularly suitable as the material of valve actuation section.
As preferably, described oil pump drives section and uses a cast steel.The contact stress that the cast steel cam can bear is 2000～2500MPa, satisfies high pressure oil pump cam requirement of strength fully.But its cost is higher, therefore only uses at oil pump to drive section, with relative minimizing holistic cost of the present utility model.
As preferably, described valve actuation section connects by sliding cross coupling with the oil pump section of driving.Sliding cross coupling is simple in structure easy for installation, and has high moment of torsion, high rigidity, and highly sensitive characteristics, and crosshead shoe can play the effect of two sections axis body relative displacements of compensation, assurance the utility model working stability.
As preferably, the crosshead shoe of described sliding cross coupling arranges the bar shaped oil groove in the projection side, and described oil groove axially arranges along crosshead shoe.Sliding cross coupling can owing to centrifugal action throws away lubricant oil, for guaranteeing the sliding cross coupling working stability, need often to add lubricant oil in the course of the work at the crosshead shoe place.Oil groove plays the effect of accommodating parts of lubricating oil, and its direction is axial along crosshead shoe, and the centrifugalization impact is little, prevents the too fast consumption of lubricant oil, reduces the frequency of demolition and maintenance.
Therefore, the utlity model has following beneficial effect: (1) satisfies the requirement that drives simultaneously engine valve and high pressure oil pump; (2) use sliding cross coupling to compensate the relative displacement of two sections axis bodies, guarantee working stability.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Embodiment: as shown in Figure 1, a kind of camshaft of the present utility model comprises axis body, and described axis body comprises that the valve actuation section 1 of coaxial connection and oil pump drive section 2.Valve actuation section 1 is used chilled cast iron.Chilled cast iron has low cost, high-performance, and good wear resistance and resistance to marring are particularly suitable as the material of valve actuation section 1.Oil pump drives section 2 and uses cast steel.The contact stress that the cast steel cam can bear is 2000～2500MPa, satisfies high pressure oil pump cam requirement of strength fully.But its cost is higher, therefore only uses at oil pump to drive section 2, with relative minimizing holistic cost of the present utility model.
Valve actuation section 1 realizes coaxial connection with the oil pump section of driving 2 by a sliding cross coupling.Valve actuation section 1 is provided with valve actuation cam 3, and oil pump drives section 2 and is provided with oil pump driving cam 4.Sliding cross coupling is simple in structure easy for installation, and has high moment of torsion, high rigidity, and highly sensitive characteristics, and crosshead shoe 5 can play the effect of two sections axis body relative displacements of compensation, assurance the utility model working stability.The crosshead shoe 5 of described sliding cross coupling arranges bar shaped oil groove 6 in the projection side, and it is axial along crosshead shoe 5 that described oil groove 6 is positioned at the projection middle part, and oil groove 6 shape of cross sections are rectangle.Sliding cross coupling can owing to centrifugal action throws away lubricant oil, for guaranteeing the sliding cross coupling working stability, need often to add lubricant oil in the course of the work at crosshead shoe 5 places.Oil groove 6 plays the effect of accommodating parts of lubricating oil, and its direction is axial along crosshead shoe 5, and the centrifugalization impact is little, prevents the too fast consumption of lubricant oil, reduces the frequency of demolition and maintenance.
Claims (5)
1. camshaft, comprise axis body, it is characterized in that, axis body comprises that the valve actuation section (1) of coaxial connection and oil pump drive section (2), valve actuation section (1) is provided with valve actuation cam (3), and oil pump drives section (2) and is provided with oil pump driving cam (4).
2. a kind of camshaft according to claim 1 is characterized in that, described valve actuation section (1) is used chilled cast iron.
3. a kind of camshaft according to claim 1 is characterized in that, described oil pump drives section (2) and uses cast steel.
4. according to claim 1 and 2 or 3 described a kind of camshafts, it is characterized in that, valve actuation section (1) connects by sliding cross coupling with the oil pump section of driving (2).
5. a kind of camshaft according to claim 4 is characterized in that, the crosshead shoe of described sliding cross coupling (5) arranges bar shaped oil groove (6) in the projection side, and described oil groove (6) axially arranges along crosshead shoe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527109 CN202866917U (en) | 2012-10-16 | 2012-10-16 | Cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527109 CN202866917U (en) | 2012-10-16 | 2012-10-16 | Cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202866917U true CN202866917U (en) | 2013-04-10 |
Family
ID=48033642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220527109 Expired - Fee Related CN202866917U (en) | 2012-10-16 | 2012-10-16 | Cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202866917U (en) |
-
2012
- 2012-10-16 CN CN 201220527109 patent/CN202866917U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20131016 |