CN2428397Y - Oval chain wheel - Google Patents
Oval chain wheel Download PDFInfo
- Publication number
- CN2428397Y CN2428397Y CN 99246901 CN99246901U CN2428397Y CN 2428397 Y CN2428397 Y CN 2428397Y CN 99246901 CN99246901 CN 99246901 CN 99246901 U CN99246901 U CN 99246901U CN 2428397 Y CN2428397 Y CN 2428397Y
- Authority
- CN
- China
- Prior art keywords
- crank
- chain wheel
- elliptical
- bicycle
- force
- 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
- 230000004075 alteration Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Gears, Cams (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model discloses an oval sprocket, after replacing epaxial round sprocket in bicycle with it, can reach obvious laborsaving purpose. The replacing assembly method is that the long ellipse axis of the ellipse chain wheel is vertically arranged with the two cranks, as shown in the attached drawing of the abstract. An elliptical sprocket is characterized by a pitch curve that is elliptical or nearly elliptical. The labor-saving principle of mounting the crank on the bicycle is that the bicycle moves forward at a constant speed, when the crank is near a horizontal position, the crank rotates slowly to exert force, and when the crank is near a vertical position, the crank rotates rapidly to exert force in short time and slides rapidly. That is, the place where the force is applied, and the place where the force is not applied slides rapidly.
Description
1, title of the present utility model is an Elliptic chain wheel, with the round sprocket wheel on its replacement bicycle middle shaft.
2, the prior art situation is at present: bicycle is as general a kind of walking-replacing tool of people, and for these years for people provide huge convenience, but the driving efficiency of the power of bicycle lowly is its drawback always.Because the strength of one's legs direction is downward all the time, identical strength of one's legs is in different positions at crank, the action effect difference of its power, and wherein crank is when level attitude, and the work done effect of strength of one's legs is best; And the work done effect is the poorest when the plumb position.
3, the utility model purpose that will realize is: replace general round sprocket wheel on the bicycle middle shaft to reach the labour-saving purpose with Elliptic chain wheel.
4, the version of Elliptic chain wheel is: Elliptic chain wheel is the sprocket wheel that the pitch circle alteration of form of standard round sprocket wheel is formed for ellipse or sub-elliptical.
5, the advantage of Elliptic chain wheel: by the vertical installation of its transverse as shown in drawings with two cranks Elliptic chain wheel.If bicycle at the uniform velocity advanced in a period of time, then chain line speed V is constant, then there are following two kinds of situations: when crank during at level attitude according to formula V=WR, chain is in the major axis position of Elliptic chain wheel, radius of rotation R maximum on the sprocket wheel at chain place, then at this moment Elliptic chain wheel rotating speed W is the slowest; When crank during in the plumb position, situation is just in time opposite, and promptly Elliptic chain wheel rotating speed W is the fastest.From the above, in the place of the action effect difference of power, when just crank was near the plumb position, Elliptic chain wheel slipped over fast, and had little time basically firmly; And in the good place of the action effect of power, when promptly crank is near level attitude, Elliptic chain wheel slow rotation, free application of force work done.The laborsaving characteristics of Here it is Elliptic chain wheel, place that promptly should be firmly firmly, the place that should not exert oneself slips over fast.Not waste power is laborsaving.These laborsaving characteristics be experimental results show that.
6, description of drawings: in the accompanying drawing, 1. be that 3. 2. pedal be Elliptic chain wheel for crank
7, realize that best method of the present utility model is: the major axis of Elliptic chain wheel and crank are installed Elliptic chain wheel and crank in vertical direction.One cover chain tension mechanism is installed on bicycle rear axle simultaneously to get final product.
Claims (2)
1, title of the present utility model is an Elliptic chain wheel, and it is that the pitch circle alteration of form of standard round sprocket wheel is the oval sprocket wheel that forms, and the pitch curve that it is characterized in that Elliptic chain wheel is ellipse or sub-elliptical.
2, Elliptic chain wheel according to claim 1 is characterized in that: the elliptical shape of its pitch curve comprises standard ellipse that meets elliptic equation and the sub-elliptical of being made up of other curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246901 CN2428397Y (en) | 1999-10-30 | 1999-10-30 | Oval chain wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99246901 CN2428397Y (en) | 1999-10-30 | 1999-10-30 | Oval chain wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428397Y true CN2428397Y (en) | 2001-05-02 |
Family
ID=34032436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99246901 Expired - Fee Related CN2428397Y (en) | 1999-10-30 | 1999-10-30 | Oval chain wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428397Y (en) |
-
1999
- 1999-10-30 CN CN 99246901 patent/CN2428397Y/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 | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Zhonghua Document name: Notification of Termination of Patent Right |
|
| 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 |