CN2913618Y - Transmission mechanism for motorcycle engine distribution cam - Google Patents
Transmission mechanism for motorcycle engine distribution cam Download PDFInfo
- Publication number
- CN2913618Y CN2913618Y CN 200620103085 CN200620103085U CN2913618Y CN 2913618 Y CN2913618 Y CN 2913618Y CN 200620103085 CN200620103085 CN 200620103085 CN 200620103085 U CN200620103085 U CN 200620103085U CN 2913618 Y CN2913618 Y CN 2913618Y
- Authority
- CN
- China
- Prior art keywords
- valve cam
- driven gear
- motorcycle engine
- gear
- driving mechanism
- 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
Links
Abstract
The utility model provides a transmission mechanism for valve cam of a motorcycle engine, belongs to the field of mechanical technique, and solves the problems of the prior art, such as poor work stability, short service life and large noise. The transmission mechanism comprises a driving gear, a driven gear, a valve cam, and a small shaft. The valve cam is sleeved around the small shaft; the driven gear is connected with the valve cam; the driving gear is engaged with the driven gear, and a needle roller bearing is arranged between the small shaft and the valve cam. During the operation of the motorcycle engine, the power is transferred to the valve cam by the driving and driven gears. Since the small shaft is immobile, the needle roller bearing and the small shaft form a friction pair when the valve cam rotates along with the driven gear, reducing the wearing of the needle roller bearing. The utility model has the advantages of long service life, low power loss, low noise, and high work stability.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to the driving mechanism of motorcycle engine valve cam.
Background technique
As shown in Figure 1, the driving mechanism of existing C G125 motorcycle engine valve cam is made up of driving gear 1, driven gear 2, valve cam 3 and little axle 4.Valve cam 3 is set on the little axle 4, and driven gear 2 is connected with valve cam 3, and driving gear 1 is meshed with driven gear 2.Between valve cam 3 and little axle 4, be provided with axle sleeve 7.Like this, axle sleeve 7 just forms friction pair with little axle 4.
As can be seen, when two gears 1,2 transmitted power in the course of the work, axle sleeve 7 can be directly and valve cam 3 or the 4 generation sliding frictions of little axle, makes axle sleeve 7 serious wear.And axle sleeve 7 places need lubricant oil to be lubricated, in case lubricated well cuts is more, will cause axle sleeve 7 to wear and tear faster.
Simultaneously, driving gear 1 is soft one soft engagement with the flank engagement of driven gear 2.Like this, gear can damage after using a period of time, as rippling, bonding.Moreover valve cam uses malleable cast iron or chilled cast iron manufacturing, and its hardness is not high, quick abrasion, and working life is not long.
Summary of the invention
The purpose of this utility model is the existing the problems referred to above of driving mechanism at existing C G125 motorcycle engine valve cam, a kind of driving mechanism of the motorcycle engine valve cam through improveing is provided, make that it has long service life, stability is high, power loss is little, the characteristics that noise is low.
The purpose of this utility model can realize by following technical proposal: the driving mechanism of this motorcycle engine valve cam, comprise driving gear, driven gear, valve cam and little axle, valve cam is set on the little axle, driven gear is connected with valve cam, driving gear and driven gear engagement, it is characterized in that, be provided with needle bearing between described little axle and the valve cam.
Motor is in operation process, and power is passed on the valve cam through driving gear, driven gear successively.Because little axle is fixed, valve cam is along with in the driven gear rotation process, and needle bearing and little axle just form friction pair.Obviously, be rolling friction between needle bearing and the little axle, therefore, needle bearing is corresponding less with respect to the frictional loss between axle sleeve and the little axle.
In the driving mechanism of above-mentioned motorcycle engine valve cam, described valve cam port is provided with back-up ring.Back-up ring can stop needle bearing, prevents that needle bearing from skidding off.
In the driving mechanism of above-mentioned motorcycle engine valve cam, described valve cam is that drive fit is connected with driven gear.Valve cam and driven gear can be linked together firmly by such structure.
In the driving mechanism of above-mentioned motorcycle engine valve cam, described driving gear is the hard flank of tooth.Because driven gear is an ordinary construction, is the soft flank of tooth.Therefore, such structure makes to have good running-in ability between driving gear and the driven gear, meshes more reliable and stable.
In the driving mechanism of above-mentioned motorcycle engine valve cam, described valve cam is made by alloy steel material.Original structure malleable cast iron or chilled cast iron hardness deficiency, the problem of abrasion-resistance deficiency have been changed by this material.
Compared with prior art, in the driving mechanism of this motorcycle engine valve cam, owing to be provided with needle bearing, in the valve cam rotation process, the needle roller in the needle bearing can be followed rotation between little axle and the valve cam.Therefore, the wearing and tearing of needle bearing are less, can keep the parallelism on accurate gear transmission centre distance and valve cam surface, and it is longer to make it the life-span, and power loss is few, and noise is low.
Simultaneously, driving gear is the soft flank of tooth for hard flank of tooth driven gear in this driving mechanism.Obviously, stability was higher when two gears were meshed, and had overcome phenomenons such as rippling, adhesion.In addition, adopt common needle bearing to get final product, so technology is simple, has higher utility.
Description of drawings
Fig. 1 is the structural representation of the driving mechanism of existing C G125 motorcycle engine valve cam.
Fig. 2 is the structural representation of the driving mechanism of this motorcycle engine valve cam.
Among the figure, 1, driving gear; 2, driven gear; 3, valve cam; 31, annular groove 4, little axle; 5, needle bearing; 6, back-up ring; 7, axle sleeve.
Embodiment
As shown in Figure 2, the driving mechanism of this motorcycle engine valve cam comprises driving gear 1, driven gear 2, valve cam 3, little axle 4 and needle bearing 5, back-up ring 6 etc.
Driving gear 1 is connected with motor.Driven gear 2 is meshed with driving gear 1 and is connected with valve cam 3, and in the present embodiment, driven gear 2 is connected for drive fit with valve cam 3.Valve cam 3 is set on the little axle 4, and is provided with needle bearing 5 between little axle 4 and valve cam 3.
In order to prevent that needle bearing 5 from skidding off, be provided with back-up ring 6 in the port of valve cam 3, by back-up ring 6 needle bearing 5 is stopped.In the present embodiment, the port of valve cam 3 is provided with annular groove 31 one, and back-up ring 6 just is loaded in this annular groove 31, and back-up ring 6 parts stretch out annular groove 31, and an end of needle bearing 5 just is resisted against on the extension of back-up ring 6.
Simultaneously, valve cam 3 is made by alloy steel material, to improve its intensity and hardness.
In addition, in order to increase the working stability of this driving mechanism, driving gear 1 is the soft flank of tooth for hard flank of tooth driven gear 2.
Motor is in operation process, and driving gear 1 rotates, and is following with the driven gear 2 of driving gear 1 engagement and is rotating.Drive valve cam 3 friction tight in driven gear 2 rotation processes and together rotate with it, owing to maintain static for little 4, so just form friction pair between needle bearing 5 and the little axle 4.As can be seen, in valve cam 3 rotation processes, the needle roller in the needle bearing 5 is being followed and is being rotated.Make the wearing and tearing between needle bearing 5 and valve cam 3 or the little axle 4 reduce by the rolling friction between them, thereby prolong its working life, reduce power loss, reduce noise.
Claims (6)
1, a kind of driving mechanism of motorcycle engine valve cam, comprise driving gear (1), driven gear (2), valve cam (3) and little axle (4), valve cam (3) is set on the little axle (4), driven gear (2) is connected with valve cam (3), driving gear (1) and driven gear (2) engagement, it is characterized in that, be provided with needle bearing (5) between described little axle (4) and the valve cam (3).
2, the driving mechanism of motorcycle engine valve cam according to claim 1 is characterized in that, described valve cam (3) port is provided with back-up ring (6).
3, the driving mechanism of motorcycle engine valve cam according to claim 1 and 2 is characterized in that, described valve cam (3) is connected for drive fit with driven gear (2).
4, the driving mechanism of motorcycle engine valve cam according to claim 1 and 2 is characterized in that, described driving gear (1) is the hard flank of tooth.
5, the driving mechanism of motorcycle engine valve cam according to claim 3 is characterized in that, described driving gear (1) is the hard flank of tooth.
6, the driving mechanism of motorcycle engine valve cam according to claim 1 and 2 is characterized in that, described valve cam (3) is made by alloy steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103085 CN2913618Y (en) | 2006-04-27 | 2006-04-27 | Transmission mechanism for motorcycle engine distribution cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620103085 CN2913618Y (en) | 2006-04-27 | 2006-04-27 | Transmission mechanism for motorcycle engine distribution cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2913618Y true CN2913618Y (en) | 2007-06-20 |
Family
ID=38168217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620103085 Expired - Fee Related CN2913618Y (en) | 2006-04-27 | 2006-04-27 | Transmission mechanism for motorcycle engine distribution cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2913618Y (en) |
-
2006
- 2006-04-27 CN CN 200620103085 patent/CN2913618Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |