CN200964877Y - Four-stroke engine cam device for motorcycle - Google Patents
Four-stroke engine cam device for motorcycle Download PDFInfo
- Publication number
- CN200964877Y CN200964877Y CN 200620134284 CN200620134284U CN200964877Y CN 200964877 Y CN200964877 Y CN 200964877Y CN 200620134284 CN200620134284 CN 200620134284 CN 200620134284 U CN200620134284 U CN 200620134284U CN 200964877 Y CN200964877 Y CN 200964877Y
- Authority
- CN
- China
- Prior art keywords
- sprocket
- cam
- stroke engine
- camshaft
- connecting sleeve
- 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 discloses a cam device, in particular to a motorcycle-used four-stroke engine cam device which includes a camshaft (1) which is provided with an exhaust cam (2) and an air inlet cam (10); the shaft end of the camshaft (1) is fixed with a connecting sleeve (3) which is fixedly connected with a driven chain wheel (4) which is connected with a drive chain wheel (6) by the chains (5). The utility model is characterized in that the maximum stroke of the air inlet cam (10) is 6.223 plus or minus 0.06mm; the maximum stroke of the exhaust cam (2) is 5.986 plus or minus 0.06mm; compared with the prior art, as the stroke of the inlet and exhaust cam is improved by 0.6mm, the starting range of the valve is large, therefore the sufficient air enters and the exhaust is thorough and the power output of the engine is improved.
Description
Technical field
The utility model relates to a kind of cam gear, particularly a kind of motorcycle four stroke engine cam gear.
Background technique
Existing motorcycle with four stroke engine cam gear structure is: the tubular camshaft that a hollow is arranged, on camshaft, be provided with intake cam and the exhaust cam into a single integrated structure with camshaft, the maximum lift of intake cam is 5.623 ± 0.060 millimeters, and the maximum lift of exhaust cam is 5.386 ± 0.060 millimeters; Adopt interference fit to be fixed with connecting sleeve in the termination of camshaft, the inner hole sleeve of driven sprocket is contained in the end of camshaft and leans on mutually with the end face of connecting sleeve, is connected by screw; The number of teeth of driven sprocket is 28, and the number of teeth of the drive sprocket that matches with driven sprocket is 14.The cam gear of this structure has following shortcoming: the lift of inlet and outlet cam is less, causes inlet and outlet door opening degree deficiency, and what of inlet and outlet amount are the size of valve opening directly influence, and finally influences the power of motor; Drive connecting sleeve and camshaft rotation by the set screw on it when driven sprocket rotates, screw bears driving torque, fracture easily in use, and working life is short, increases engineering time; Existing drive sprocket, driven sprocket and chain are also thiner, and intensity is not high, phenomenon often occurs damaging.
The model utility content
That technical problem to be solved in the utility model is that the inlet and outlet door is opened is little, air inflow and air displacement deficiency, working life short problem, very to existing technical problem, the purpose of this utility model provide a kind of inlet and outlet door open big, air inflow is sufficient, exhaust is thorough, intensity is high, the motorcycle of long service life four stroke engine cam gear, overcomes the deficiencies in the prior art.
Motorcycle of the present utility model four stroke engine cam gear, comprise camshaft, on camshaft, be provided with exhaust cam and intake cam, the axle head of camshaft is fixed with connecting sleeve, driven sprocket is fixedlyed connected with connecting sleeve, driven sprocket is connected with drive sprocket by chain, and the maximum lift of intake cam is 6.223 ± 0.06 millimeters, and the maximum lift of exhaust cam is 5.986 ± 0.06 millimeters.
Motorcycle of the present utility model four stroke engine cam gear, linkage structure between wherein said driven sprocket and the described connecting sleeve is: be provided with the sprocket wheel installation base in the termination of connecting sleeve, the endoporus of driven sprocket and described sprocket wheel installation base match, the sprocket wheel installation base can be stirred driven sprocket and rotate, and is provided with screw axial between driven sprocket and the sprocket wheel installation base and fixes.
Motorcycle of the present utility model four stroke engine cam gear, wherein said sprocket wheel installation base is microscler, the middle part dual-side is parallel, the two end part semicircular in shape.
Motorcycle of the present utility model four stroke engine cam gear, the wherein said driven number of teeth that connects wheel is 24, the number of teeth of drive sprocket is 12.
Motorcycle of the present utility model four stroke engine cam gear, because the lift of inlet and outlet cam improves, the valve opening amplitude is big, so the air inlet abundance, exhaust is thorough, has improved the power output of motor; Changed Placement between the center hole of driven sprocket and the connecting sleeve by the screw transferring power, its power is to transmit by cooperating between the microscler boss on the connecting sleeve and the follower center hole, camshaft drives connecting sleeve and rotates, stir follower by microscler boss again and rotate, overcome the defect of easily broken screw in the prior art; The minimizing of the number of teeth of driven sprocket and drive sprocket can make that each sprocket wheel and chain are plump to be increased, and the chain rivet in the chain can corresponding overstriking, improves bearing capacity, increases the service life, and reduces engineering time.
Description of drawings
Fig. 1 is the structural representation of the utility model motorcycle with the four stroke engine cam gear;
Fig. 2 is that schematic representation is looked on a left side shown in Figure 1;
Fig. 3 is an A-A sectional schematic diagram shown in Figure 1;
Fig. 4 is a B-B sectional schematic diagram shown in Figure 1.
Embodiment
As shown in the figure: 1 is camshaft, camshaft is a hollow tubular, and intake cam 10 and exhaust cam 2 are structure as a whole with protruding axle, and the base circle diameter (BCD) of each cam is 21 millimeters, the maximum lift of intake cam 10 is 6.223 ± 0.06 millimeters, has improved 0.6 millimeter than the maximum lift of prior art.The maximum lift of exhaust cam 2 is 5.986 ± 0.06 millimeters, has improved 0.6 millimeter than the maximum lift of prior art.Because the raising of lift, the height that intake valve and exhaust valve platform rise increases, and the valve opening degree strengthens, the air inlet abundance, and exhaust is thorough, and the power of motor is improved.
With the end machining of the connecting sleeve 3 of camshaft 1 interference fit sprocket wheel installation base 7 is arranged, it is shaped as microscler, middle bi-side are parallel, two ends is circular arc, and the endoporus of driven sprocket 4 and sprocket wheel installation base 7 match cover thereon, and sprocket wheel installation base 7 can be stirred the follower rotation during transmission, between driven sprocket 4 and connecting sleeve 3, be provided with the screw 8 of axial restraint, change the structure of utilizing the screw transferring power in the prior art, improved intensity, reduced engineering time.The end face of the sprocket wheel installation base 7 on the connecting sleeve 3 stretches out the mesopore outside of driven sprocket 4, forms platform 9.
The number of teeth of driven sprocket 4 and drive sprocket 6 reduces, and the number of teeth of driven sprocket 4 is 24, and the number of teeth of drive sprocket 6 is 12, the adjacent teeth spacing increases, and the spacing of chain shaft increases thereupon, but overstriking this moment chain shaft diameter, improve the intensity of entire mechanism greatly, increased working life.
Claims (4)
1, a kind of motorcycle four stroke engine cam gear, it comprises camshaft (1), on camshaft (1), be provided with exhaust cam (2) and intake cam (10), the axle head of camshaft (1) is fixed with connecting sleeve (3), driven sprocket (4) is fixedlyed connected with connecting sleeve (3), driven sprocket (4) is connected with drive sprocket (6) by chain (5), it is characterized in that: the maximum lift of described intake cam (10) is 6.223 ± 0.06 millimeters, and the maximum lift of described exhaust cam (2) is 5.986 ± 0.06 millimeters.
2, motorcycle according to claim 1 four stroke engine cam gear, it is characterized in that: the linkage structure between described driven sprocket (4) and the described connecting sleeve (3) is: be provided with sprocket wheel installation base (7) in the termination of connecting sleeve (3), the endoporus of driven sprocket (4) and described sprocket wheel installation base (7) match, sprocket wheel installation base (7) can be stirred driven sprocket and rotate (4) rotation, is provided with screw (8) axial restraint between driven sprocket (4) and the sprocket wheel installation base (7).
3, motorcycle according to claim 2 four stroke engine cam gear is characterized in that: described sprocket wheel installation base (7) is for microscler, and the middle part dual-side is parallel, the two end part semicircular in shape.
4, motorcycle according to claim 3 four stroke engine cam gear is characterized in that: the described driven number of teeth that connects wheel (4) is 24, and the number of teeth of drive sprocket (6) is 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620134284 CN200964877Y (en) | 2006-11-07 | 2006-11-07 | Four-stroke engine cam device for motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620134284 CN200964877Y (en) | 2006-11-07 | 2006-11-07 | Four-stroke engine cam device for motorcycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200964877Y true CN200964877Y (en) | 2007-10-24 |
Family
ID=38868891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620134284 Expired - Fee Related CN200964877Y (en) | 2006-11-07 | 2006-11-07 | Four-stroke engine cam device for motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200964877Y (en) |
-
2006
- 2006-11-07 CN CN 200620134284 patent/CN200964877Y/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: 20071024 Termination date: 20091207 |