CN201321894Y - Crank shaft connecting rod assembly of motor cycle engine - Google Patents
Crank shaft connecting rod assembly of motor cycle engine Download PDFInfo
- Publication number
- CN201321894Y CN201321894Y CNU2008201008462U CN200820100846U CN201321894Y CN 201321894 Y CN201321894 Y CN 201321894Y CN U2008201008462 U CNU2008201008462 U CN U2008201008462U CN 200820100846 U CN200820100846 U CN 200820100846U CN 201321894 Y CN201321894 Y CN 201321894Y
- Authority
- CN
- China
- Prior art keywords
- crank shaft
- connecting rod
- crank
- right crank
- tooth
- 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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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model discloses a crank shaft connecting rod assembly of a motor cycle engine, which comprises a left crank shaft (1), a right crank shaft (2), a crank pin (3), a connecting rod (4) and a tooth-shaped chain chain wheel (5), wherein the big end of the connecting rod (4) is positioned between the shanks of the left crank shaft (1) and the right crank shaft (2), the big end of the connecting rod (4), the shank of the left crank shaft (1) and the shank of the right crank shaft (2) are connected through the crank pin (3), a spline segment (2a) is arranged at the middle part of a shaft body of the right crank shaft (2), an isodiametric polished rod segment connected with the spline segment (2a) is arranged on the left side of the spline segment (2a) of the shaft body of the right crank shaft (2), the tooth-shaped chain chain wheel (5) is embedded at the polished rod segment, and the tooth-shaped chain chain wheel and the polished rod segment are connected through interference fit. The assembly relationship between the tooth-shaped chain chain wheel and the shaft body of the right crank shaft is changed, the utility model not only reduces the manufacturing cost, but also effectively avoids the phenomenon of jumping motion of the tooth-shaped chain chain wheel, ensures the stable transmission of the chain, and has the characteristics of unique design, simple structure and easy implementation and the like.
Description
Technical field
The utility model relates to a kind of two-wheel car engine, relates in particular to the crank-connecting rod assembly of motorcycle engine.
Background technique
The crank-connecting rod assembly is the vitals on the two-wheel car engine, and its function is that the linear reciprocating motion with piston changes rotatablely moving of crank into, and outside output torque.Traditional crank-connecting rod assembly is made of parts such as left crank, right crank, crank pin, connecting rod, bearing, trunnion shaft actuation gear and silent chain sprocket wheels, the shank of left and right crank is connected with the stub end of connecting rod by crank pin, at the axle body of left crank near the position of shank bearing set and trunnion shaft actuation gear successively from left to right, right crank axle body near the position of shank bearing set and silent chain sprocket wheel successively from left to right, the silent chain sprocket wheel can be connected with sprocket wheel on the camshaft by chain.In existing structure, the axle body of right crank has spline segment, installs for silent chain sprocket wheel and driving gear.Owing to adopt spline to be connected between silent chain sprocket wheel and the right crank axle body, position and transmission by spline, one side spline processing difficulties need be utilized special device, and manufacture cost is higher; On the other hand, can there be matching gap unavoidably between silent chain sprocket wheel and the right crank axle body, influential to both synchronisms like this, and the silent chain sprocket wheel beats easily, makes that chaindriven stationarity is relatively poor.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of motorcycle engine crank-connecting rod assembly that can prevent effectively that the silent chain sprocket wheel from beating.
The technical solution of the utility model is as follows: a kind of motorcycle engine crank-connecting rod assembly, comprise left crank, right crank, crank pin, connecting rod and silent chain sprocket wheel, wherein the stub end of connecting rod is between the shank of left and right crank, the three connects by crank pin, and be provided with a spline segment at the middle part of right crank axle body, its key is: be provided with one in the left side of described right crank axle body spline segment and link to each other and isometrical polished rod section with spline segment, described silent chain sprocket wheel is sleeved on this polished rod section, passes through interference fit between the two.
The endoporus of the utility model silent chain sprocket wheel on the basis of conventional art is set to unthreaded hole, the position that right crank axle body is installed for the silent chain sprocket wheel is set to the polished rod section, the silent chain sprocket wheel is fitted on this polished rod section, has simplified processing so on the one hand, has reduced manufacture cost; On the other hand, be connected firmly between silent chain sprocket wheel and the right crank axle body, when having eliminated matching gap, ensured the synchronism that both rotate, and prevented that effectively the silent chain sprocket wheel from beating, improved chaindriven stationarity greatly.
Beneficial effect: the utility model is by changing the assembly relation between silent chain sprocket wheel and the right crank axle body, both reduced cost of production, effectively avoid the silent chain sprocket wheel to beat again, guaranteed the steady transmission of chain, had characteristics such as design is ingenious, simple in structure, enforcement is easy.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, the utility model is made of parts such as left crank 1, right crank 2, crank pin 3, connecting rod 4, silent chain sprocket wheel 5, deep groove ball bearing 6, trunnion shaft actuation gear 7 and needle bearings 8.Wherein left and right crank 1,2 is symmetrical distribution in the both sides of connecting rod 4 stub ends, and the shank of left and right crank 1,2 press-fits respectively in the two ends of crank pin 3, and the stub end of connecting rod 4 is connected with the middle part of crank pin 3 by needle bearing 8.Axle body at described left crank 1 overlaps deep groove ball bearing 6 and trunnion shaft actuation gear 7 from left to right successively admittedly near the position of shank.The axle body of described right crank 2 is a stepped shape, and diameter reduces successively from left to right.Position at the close shank of right crank 2 axle bodies press-fits deep groove ball bearing, and the middle part of right crank 2 axle bodies has a spline segment 2a, installs for driving gear.Be provided with one in the left side of described right crank 2 axle body spline segment 2a and link to each other and isometrical polished rod section with spline segment 2a, described silent chain sprocket wheel 5 is sleeved on this polished rod section, passes through interference fit between the two.
Claims (1)
1, a kind of motorcycle engine crank-connecting rod assembly, comprise left crank (1), right crank (2), crank pin (3), connecting rod (4) and silent chain sprocket wheel (5), wherein the stub end of connecting rod (4) is positioned at a left side, right crank (1,2) between the shank, the three connects by crank pin (3), and be provided with a spline segment (2a) at the middle part of right crank (2) axle body, it is characterized in that: be provided with one in the left side of described right crank (2) axle body spline segment (2a) and link to each other with spline segment (2a), and isometrical polished rod section, described silent chain sprocket wheel (5) is sleeved on this polished rod section, passes through interference fit between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201008462U CN201321894Y (en) | 2008-12-04 | 2008-12-04 | Crank shaft connecting rod assembly of motor cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201008462U CN201321894Y (en) | 2008-12-04 | 2008-12-04 | Crank shaft connecting rod assembly of motor cycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201321894Y true CN201321894Y (en) | 2009-10-07 |
Family
ID=41159278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201008462U Expired - Fee Related CN201321894Y (en) | 2008-12-04 | 2008-12-04 | Crank shaft connecting rod assembly of motor cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201321894Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306814A (en) * | 2013-06-28 | 2013-09-18 | 力帆实业(集团)股份有限公司 | Crankshaft link mechanism of motor cycle engine |
| CN104389678A (en) * | 2014-10-29 | 2015-03-04 | 青岛德盛机械制造有限公司 | Motorcycle, motorcycle crank connecting rod assembly and crank pin seal assembly |
-
2008
- 2008-12-04 CN CNU2008201008462U patent/CN201321894Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306814A (en) * | 2013-06-28 | 2013-09-18 | 力帆实业(集团)股份有限公司 | Crankshaft link mechanism of motor cycle engine |
| CN103306814B (en) * | 2013-06-28 | 2015-09-30 | 力帆实业(集团)股份有限公司 | Motorcycle engine crank connecting rod mechanism |
| CN104389678A (en) * | 2014-10-29 | 2015-03-04 | 青岛德盛机械制造有限公司 | Motorcycle, motorcycle crank connecting rod assembly and crank pin seal assembly |
| CN104389678B (en) * | 2014-10-29 | 2017-06-30 | 青岛德盛机械制造有限公司 | Motorcycle, motorcycle crank connecting rod ASSY and crank-pin seal assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091007 Termination date: 20151204 |
|
| EXPY | Termination of patent right or utility model |