CN2823562Y - Driving mechanism for IC engine - Google Patents
Driving mechanism for IC engine Download PDFInfo
- Publication number
- CN2823562Y CN2823562Y CN 200520064077 CN200520064077U CN2823562Y CN 2823562 Y CN2823562 Y CN 2823562Y CN 200520064077 CN200520064077 CN 200520064077 CN 200520064077 U CN200520064077 U CN 200520064077U CN 2823562 Y CN2823562 Y CN 2823562Y
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- CN
- China
- Prior art keywords
- gear
- cam
- camshaft
- utility
- combustion engine
- 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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- Valve-Gear Or Valve Arrangements (AREA)
- Gear Transmission (AREA)
Abstract
The utility model discloses a driving mechanism for an internal combustion engine. The utility model comprises a crank shaft gear, a cam shaft gear and cams arranged on a cam shaft. The utility model is characterized in that the transmission ratio between the crank shaft gear and the cam shaft gear is equal to 4: 1; the crank shaft gear is directly engaged with the cam shaft gear; the two cams arranged. The driving mechanism for an internal combustion engine of the utility model has the advantages of simple structure, low cost and long service life.
Description
Technical field
The utility model relates to a kind of transmission mechanism of internal-combustion engine, particularly relates to the driving mechanism of a kind of I. C. engine crankshaft and camshaft.
Background technique
In the bent axle and camshaft drive of existing quartastroke engine, generally comprise crankshaft gear, camshaft gear wheel and be located at single cam on the camshaft, control the action that opens and closes of inlet and outlet door by single cam., because the velocity ratio that traditional crankshaft gear is connected with camshaft gear wheel is 2: 1, the centre distance between crankshaft gear and the camshaft gear wheel is bigger, must set up an idle gear between crankshaft gear and camshaft gear wheel.So the mechanical transmission structure more complicated, manufacture cost is also higher.In addition, the linear velocity when the cam friction pair in the train of gearings rotates is higher, and wear phenomenon appears in cam easily, influences the stability of train of gearings operation.
Summary of the invention
Goal of the invention of the present utility model is to overcome the deficiencies in the prior art, and a kind of transmission mechanism of internal-combustion engine of simple in structure, with low cost, long service life is provided.
Goal of the invention of the present utility model is achieved in that a kind of transmission mechanism of internal-combustion engine, comprises crankshaft gear, camshaft gear wheel and is located at cam on the camshaft, and it is characterized in that: the velocity ratio between described crankshaft gear and the camshaft gear wheel is 4: 1.
Described crankshaft gear and camshaft gear wheel directly mesh.
Described cam is a double-cam.
The utility model is by improving existing transmission mechanism of internal-combustion engine, is that to replace traditional transmission ratios be 2: 1 crankshaft gear and camshaft gear wheel for 4: 1 crankshaft gear and camshaft gear wheel with transmission ratios.By the change of velocity ratio, can omit the idle gear in original train of gearings, make crankshaft gear can directly drive to camshaft gear wheel, reduced being connected with a joggle between the gear, improve the precision of train of gearings operation, simplified the structure of driving mechanism, reduced cost of production.Replace traditional single cam with double-cam, bent axle and inlet and outlet door opens and closes speed ratio that motion remained 2: 1 and the working life of improving cam when having guaranteed internal combustion engine operation.
Description of drawings
Fig. 1 is the structural representation of the utility model most preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.
According to shown in Figure 1, transmission mechanism of internal-combustion engine of the present utility model comprises crankshaft gear 1, camshaft gear wheel 2 and is located at cam 3 on the camshaft.Crankshaft gear 1 intermeshes with camshaft gear wheel 2 and is connected, and both velocity ratios are 4: 1.The train of gearings of this velocity ratio is compared with the train of gearings of 2: 1 velocity ratios of tradition, omitted the idle gear in the train of gearings, make crankshaft gear 1 can directly drive to camshaft gear wheel 2, reduced the direct engagement between the train of gearings middle gear, even through long-play, still can guarantee the accuracy of mesh between the gear, improve the stability of train of gearings operation, and simplify the structure of driving mechanism.In order to guarantee the speed ratio that opens and closes motion of internal-combustion engine bent axle and inlet and outlet door in running, cam 3 adopts the double-cam of 180 degree, even the velocity ratio between the existing like this gear is 4: 1, the speed ratio that opens and closes motion of bent axle and inlet and outlet door remained 2: 1, can reduce simultaneously the wearing and tearing of cam 3, prolong its working life.The utility model makes the train of gearings transmission more stable, more reliable by improving the structure of gear ratio, and owing to the idle gear that has omitted in original train of gearings, has simplified gear structure, has reduced cost of production.
Claims (3)
1, a kind of transmission mechanism of internal-combustion engine comprises crankshaft gear (1), camshaft gear wheel (2) and is located at cam (3) on the camshaft that it is characterized in that: the velocity ratio between described crankshaft gear (1) and the camshaft gear wheel (2) is 4: 1.
2, according to the described transmission mechanism of internal-combustion engine of claim 1, it is characterized in that: described crankshaft gear (1) and directly engagement of camshaft gear wheel (2).
3, according to the described transmission mechanism of internal-combustion engine of claim 1, it is characterized in that: described cam (3) is double-cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064077 CN2823562Y (en) | 2005-09-05 | 2005-09-05 | Driving mechanism for IC engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064077 CN2823562Y (en) | 2005-09-05 | 2005-09-05 | Driving mechanism for IC engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2823562Y true CN2823562Y (en) | 2006-10-04 |
Family
ID=37032675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520064077 Expired - Lifetime CN2823562Y (en) | 2005-09-05 | 2005-09-05 | Driving mechanism for IC engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2823562Y (en) |
-
2005
- 2005-09-05 CN CN 200520064077 patent/CN2823562Y/en not_active Expired - Lifetime
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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 |
Expiration termination date: 20150905 Granted publication date: 20061004 |
|
| EXPY | Termination of patent right or utility model |