CN201354796Y - Crank shaft connecting rod assembly - Google Patents
Crank shaft connecting rod assembly Download PDFInfo
- Publication number
- CN201354796Y CN201354796Y CNU2009201262966U CN200920126296U CN201354796Y CN 201354796 Y CN201354796 Y CN 201354796Y CN U2009201262966 U CNU2009201262966 U CN U2009201262966U CN 200920126296 U CN200920126296 U CN 200920126296U CN 201354796 Y CN201354796 Y CN 201354796Y
- Authority
- CN
- China
- Prior art keywords
- crank
- connecting rod
- crank shaft
- right crank
- axis
- 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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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model provides a crank shaft connecting rod assembly for a miniature cross country motorcycle engine, which comprises a left crank shaft, a right crank shaft, a crank pin and a connecting rod. The big end of the connecting rod is positioned between the left and the right crank shafts; the left crank shaft, the right crank shaft and the connecting rod are connected through the crank pin; the axes of the left and the right crank shafts are collinear with each other and parallel to the axis of the crank pin; the distance between the axes of the left and the right crank shafts and the axis of the crank pin ranges from 28.5 to 30.5 mm, the diameter of the shank of the right crank shaft ranges from 95 to 97 mm; the axial length of the right crank shaft ranges from 64 to 66 mm; and the center distance between the mounting hole at the big end and the mounting hole at the small end ranges from 94.3 to 96.3 mm. The crank shaft connecting rod assembly, with changes to key parameters of the crank shaft connecting rod assembly, meets the functional requirements of the miniature cross country motorcycle engine, including quick acceleration, large torque and high crank shaft rotation speed. The utility model has the characteristics of ingenious design, simple structure, easy implementation and the like.
Description
Technical field
The utility model relates to a kind of motorcycle engine, relates in particular to the crank-connecting rod assembly of engine of miniature cross-country motorcycle.
Background technique
The crank-connecting rod assembly is the key components and parts on the internal combustion engine, the compression that several big parameter of its design such as the eccentricity of crank, connecting rod centre distance, crank diameter etc. directly influence motor is output characteristics when, becomes the key factor of decision engine power performance quality.Distance in the tradition motor vehicular engine between the axis of the axis of left and right crank and crank pin is about 24.75mm, and the shank diameter of right crank is about 90mm, and the axial length of right crank is about 84mm; It is about 94mm that connnecting rod big end end mounting hole and microcephaly hold the centre distance between the mounting hole.Because traditional motor vehicular engine predominant use is a power source as common transportation, means of transportation, emphasize be engine running steadily, rotating speed and torsion output is moderate, lays particular emphasis on the Economy of oil consumption aspect.And, require that motor speed-raising is fast, explosive force is strong, moment of torsion is big, speed of crankshaft is high, so traditional motor vehicular engine can't satisfy the requirement of miniature cross-country car function as the go-anywhere vehicle motor of match character.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of crank-connecting rod assembly, to satisfy the performance requirement of engine of miniature cross-country motorcycle.
The technical solution of the utility model is as follows: a kind of engine of miniature cross-country motorcycle crank-connecting rod assembly, comprise left crank, right crank, crank pin and connecting rod, wherein the stub end of connecting rod is between left and right crank, the three connects by crank pin, the axis of left and right crank point-blank, and parallel with the axis of crank pin, its key is: the distance between the axis of described left and right crank and the axis of crank pin is 28.5～30.5mm, the shank diameter of right crank is 95～97mm, and the axial length of right crank is 64～66mm; It is 94.3～96.3mm that described connnecting rod big end end mounting hole and microcephaly hold the centre distance between the mounting hole.
The utility model keeps the structure of crank-connecting rod assembly constant on the basis of conventional art, has just changed the throw of eccentric of the relative crank of crank pin dexterously, makes the distance between the axis of the axis of left and right crank and crank pin become 28.5～30.5mm; Correspondingly adjusted simultaneously the length of connecting rod, made connnecting rod big end end mounting hole and microcephaly hold the centre distance between the mounting hole to become 94.3～96.3mm, the working stroke of motor shortens like this, has improved the rotating speed of crank greatly.In addition, the shank diameter with right crank is adjusted into 95～97mm, axial length is adjusted into 64～66mm, has effectively alleviated the weight of crank, when satisfying dynamic balancing, reducing engine luggine, helps faster speed-raising of motor and the bigger moment of torsion of output.
Preferably scheme is, the distance between the axis of above-mentioned left and right crank and the axis of crank pin is 29.5mm, and the shank diameter of right crank is 96mm, and the axial length of right crank is 65mm; It is 95.3mm that described connnecting rod big end end mounting hole and microcephaly hold the centre distance between the mounting hole.
In order to adapt to the installation needs that right crank cogs, the length of above-mentioned right crank axis body middle part spline segment is 28～30mm, and the length between the right-hand member of this spline segment and the right crank shank right side is 47～49mm.
Beneficial effect: the utility model is by changing several key parameters of crank-connecting rod assembly, satisfied the functional requirement that the engine of miniature cross-country motorcycle speed-raising is fast, explosive force is strong, moment of torsion is big, speed of crankshaft is high, have be skillfully constructed, simple in structure, implement characteristics such as 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, connecting rod bottom-end bearing 5 and crankshaft bearing 6, and the structure of each parts is same as the prior art, does not do at this and gives unnecessary details.Described left and right crank 1,2 is symmetrical distribution in the both sides of connecting rod 4 stub ends, all is pressed with crankshaft bearing 6 on left and right crank 1,2.Described left and right crank 1,2 is connected with the stub end of connecting rod 4 by crank pin 3, and connecting rod bottom-end bearing 5 is housed in the mounting hole of connecting rod 4 stub ends, and this connecting rod bottom-end bearing 5 is assemblied on the crank pin 3.
As can be known from Fig. 1, it is 94.3～96.3mm that described connecting rod 4 stub end mounting holes and microcephaly hold the centre distance L3 between the mounting hole, and L3 is preferably 95.3mm in the present embodiment.The axis of described left and right crank 1,2 point-blank, this axis parallels with the axis of crank pin 3.Distance L 1 between the axis of described left and right crank 1,2 and the axis of crank pin 3 is 28.5～30.5mm, and L1 is preferably 29.5mm in the present embodiment; The shank diameter D1 of right crank 2 is 95～97mm, and D1 is preferably 96mm among the embodiment; The axial length L2 of right crank 2 is 64～66mm, and L2 is preferably 65mm in the present embodiment; The middle part of described right crank 2 axis bodies is a spline segment, and the length L 5 of this spline segment is 28～30mm, and the length L 4 between the right-hand member of this spline segment and the right crank 2 shank right sides is 47～49mm, and L5 is preferably 29mm in the present embodiment, and L4 is preferably 48mm.
Claims (3)
1, a kind of crank-connecting rod assembly, comprise left crank (1), right crank (2), crank pin (3) and connecting rod (4), wherein the stub end of connecting rod (4) is positioned at a left side, right crank (1,2) between, the three connects by crank pin (3), a left side, right crank (1,2) axis point-blank, and parallel with the axis of crank pin (3), it is characterized in that: a described left side, right crank (1, distance (L1) between the axis of axis 2) and crank pin (3) is 28.5～30.5mm, the shank diameter (D1) of right crank (2) is 95～97mm, and the axial length (L2) of right crank (2) is 64～66mm; It is 94.3～96.3mm that described connecting rod (4) stub end mounting hole and microcephaly hold the centre distance (L3) between the mounting hole.
2, crank-connecting rod assembly according to claim 1, it is characterized in that: the distance (L1) between the axis of described left and right crank (1,2) and the axis of crank pin (3) is 29.5mm, the shank diameter (D1) of right crank (2) is 96mm, and the axial length (L2) of right crank (2) is 65mm; Described connecting rod (4) stub end mounting hole and microcephaly hold the centre distance (L3) between the mounting hole to be 95.3mm.
3, crank-connecting rod assembly according to claim 1 and 2, it is characterized in that: the length (L5) of described right crank (2) axis body middle part spline segment is 28～30mm, and the length (L4) between the right-hand member of this spline segment and right crank (2) the shank right side is 47～49mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201262966U CN201354796Y (en) | 2009-02-10 | 2009-02-10 | Crank shaft connecting rod assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201262966U CN201354796Y (en) | 2009-02-10 | 2009-02-10 | Crank shaft connecting rod assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354796Y true CN201354796Y (en) | 2009-12-02 |
Family
ID=41411137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201262966U Expired - Fee Related CN201354796Y (en) | 2009-02-10 | 2009-02-10 | Crank shaft connecting rod assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354796Y (en) |
-
2009
- 2009-02-10 CN CNU2009201262966U patent/CN201354796Y/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: 20091202 Termination date: 20130210 |