CN2401443Y - Bicycle speed booster - Google Patents
Bicycle speed booster Download PDFInfo
- Publication number
- CN2401443Y CN2401443Y CN 99243947 CN99243947U CN2401443Y CN 2401443 Y CN2401443 Y CN 2401443Y CN 99243947 CN99243947 CN 99243947 CN 99243947 U CN99243947 U CN 99243947U CN 2401443 Y CN2401443 Y CN 2401443Y
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- CN
- China
- Prior art keywords
- connecting rod
- bearing
- center
- chain
- utility
- 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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Abstract
The utility model relates to a speed booster of a bicycle, which is composed of a chain wheel disk, a bearing and a connecting rod; one end of the connecting rod is hinged with the middle part of a pedal crank; the other end of the connecting rod is hinged with the chain wheel disk; the bearing is arranged in the chain wheel disk and a center point of the bearing are arranged above the center of a center shaft; both sides of the center shaft and both sides of a rear shaft are respectively provided with a set of chain pairs of chain wheels. When the utility model is used for acceleration, the utility model has much labor saving and a mechanism is simple.
Description
The utility model relates to a kind of bicycle boost installation, is mainly used on the bicycle.
Prior art has variable speed bicycle, is by changing axis upper sprocket wheel size or add some sprocket wheel chain pairs again outside sprocket wheel chain pair, changing the purpose of the speed of a motor vehicle voluntarily to reach.Its weak point is: mechanism is complicated; Effort is big during speedup.
The purpose of this utility model is to overcome above-mentioned weak point of the prior art and labour-saving bicycle boost installation when a kind of speedup is provided.
The purpose of this utility model can reach by following measure: the utility model is made up of chain sprocket, bearing and connecting rod, connecting rod one end is articulated in pedal crank middle part, connecting rod end in addition is articulated on the chain sprocket, bearing is arranged in the chain sprocket, the center-point of chain sprocket and bearing is above the axis center, and respectively there is a cover sprocket wheel chain pair axis and rear axle both sides.
The utility model contrast prior art has following advantage:
More laborsaving during speedup; Mechanism is simpler.
The drawing of accompanying drawing is described as follows:
Fig. 1 is total figure of the present utility model;
Fig. 2 dwindles figure for the side-looking of Fig. 1, also expresses the utility model and is installed on the structure on the rear axle in the bicycle.
The accompanying drawing piece number is represented:
1, chain sprocket 2, bearing 3, connecting rod 4, pedal crank
5, axis 6, center-point 7, rear axle 8, flywheel
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing:
Fig. 1 and Fig. 2 represent structure of the present utility model, are made up of chain sprocket 1, bearing 2 and connecting rod 3, and connecting rod one end is articulated in the middle part of existing pedal crank 4, and connecting rod end in addition is articulated on the chain sprocket.Bearing 2 is arranged in the chain sprocket, and the center-point of chain sprocket and bearing 2 is moved to the center-point 6 of top by axis 5 centers of prior art.Chain sprocket 1 all is equipped with in the left and right sides of axis, has increased a flywheel 8 in the left side of bicycle rear axle 7 for this reason, and promptly respectively there is a cover sprocket wheel chain pair both sides of bicycle.
The relevant size of present embodiment is as follows: connecting rod hinge point is from axis center d=70 millimeter; Another hinge-point of connecting rod is from chain sprocket center b=80 millimeter; The chain sprocket center is from axis center a=25 millimeter; Lean forward angle [alpha]=20 ° of (being that pin is stepped on preceding line direction) of chain sprocket misalignment pedal crank center alignment; Straight-line distance c=118 millimeter between connecting rod two hinge-points.
During use, when pin was stepped on β angle=143 ° forward, another hinge-point of connecting rod drove the γ angle that chain sprocket can rotate forward, can reach 210 °, and promptly pedal 143 ° before the pin and rotate 67 ° before can making chain sprocket multidirectional, thereby, reached the purpose of speedup.A pin is stepped on nearly half cycle forward and is reached speedup, but another pin is stepped on nearly half cycle speedup again more forward.Meanwhile, the deceleration phenomenon that connecting rod causes can be offset by the flywheel on the rear axle.
Claims (1)
1, a kind of bicycle boost installation, it is characterized in that, form by chain sprocket, bearing and connecting rod, connecting rod one end is articulated in pedal crank middle part, connecting rod end in addition is articulated on the chain sprocket, bearing is arranged in the chain sprocket, and the center-point of chain sprocket and bearing is above the axis center, and respectively there is a cover sprocket wheel chain pair axis and rear axle both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99243947 CN2401443Y (en) | 1999-08-31 | 1999-08-31 | Bicycle speed booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99243947 CN2401443Y (en) | 1999-08-31 | 1999-08-31 | Bicycle speed booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2401443Y true CN2401443Y (en) | 2000-10-18 |
Family
ID=34030139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99243947 Expired - Fee Related CN2401443Y (en) | 1999-08-31 | 1999-08-31 | Bicycle speed booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2401443Y (en) |
-
1999
- 1999-08-31 CN CN 99243947 patent/CN2401443Y/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 |