CN101885365A - Bicycle center shaft transmission device - Google Patents
Bicycle center shaft transmission device Download PDFInfo
- Publication number
- CN101885365A CN101885365A CN2009100275145A CN200910027514A CN101885365A CN 101885365 A CN101885365 A CN 101885365A CN 2009100275145 A CN2009100275145 A CN 2009100275145A CN 200910027514 A CN200910027514 A CN 200910027514A CN 101885365 A CN101885365 A CN 101885365A
- Authority
- CN
- China
- Prior art keywords
- axis
- center shaft
- transmission device
- shaft transmission
- right pedal
- 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.)
- Pending
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- Axle Suspensions And Sidecars For Cycles (AREA)
Abstract
The invention discloses an improved bicycle center shaft transmission device, which is characterized in that: two end parts of the centre shaft are provided with conical square columns; holes of left and right pedal cranks, which are matched with the conical square columns, are conical square holes; and the center shaft and the left and right pedal cranks are firmly connected through tightening gaskets and screws screwed in along the axis of the center shaft. Therefore, the mechanical strength of the bicycle center shaft transmission device is greatly improved, the service life is prolonged, the use safety is improved, and the bicycle center shaft transmission device is suitable for transformation of various bicycles.
Description
[technical field]
The present invention relates to a kind of improved bicycle middle shaft driving device, constitute by axis and the left and right pedal crank, the chain wheel that are installed on the axis.
[background technology]
So far, it is columniform axis that our used bicycle middle shaft driving device has both ends, with the hole on the left and right pedal crank that matches in these axis both ends is cylindrical hole, when the two is connected, adopt bolt-type structure crosswise fixed, so all design has pin hole on axis and left and right pedal crank, thereby reduced the mechanical strength of this driving device, because the application force of latch, axis and left and right pedal crank connecting link hole very easily are out of shape, and latch itself is also easy to wear and distortion, the repair demolition inconvenience, and dismounting is just scrapped for 1-2 time.For above-mentioned reasons, when serious, can cause axis and left and right pedal crank to scrap, cause traffic accident.In addition, the latch exposed portions serve is usually drawn bad operator's the bottom of s trouser leg.
[summary of the invention]
Purpose of the present invention just is: the structure to existing bicycle middle shaft driving device is improved, and to improve its mechanical strength, increases service life and safety in utilization.
The present invention realizes its purpose like this: the axis both ends of bicycle middle shaft driving device are designed to the taper square column, hole on the left and right pedal crank that is mated is designed to corresponding taper square hole, be designed to screw in the axis two ends along the axis axis direction, bicycle when assembling with axis and left and right pedal crank cooperate install after, be formed by connecting with tightening up pad and tightening up along the screw that the screw on the direction of axis screws in.
Because the present invention has adopted above-mentioned structure, the test through up to a hundred times proves the mechanical strength that has improved the bicycle middle shaft driving device greatly, axis and left and right pedal crank auxiliary section are excellent, indeformable, increase service life, and strengthened safety in utilization.
[description of drawings]
Fig. 1 is a constructional drawing of the present invention.Fig. 2 is that A of the present invention is to view.
Among the figure 1, left foot pedals crank; 2, axis; 3, chain wheel; 4, right pedal crank; 5, tighten up pad; 6, clamp-screw; 7, taper square column.
[specific embodiment]
As shown in FIG., taper square column 7 is processed at axis 2 both ends, be contained in the mating holes of the left and right pedal crank 1,4 on the axis and make corresponding taper square hole, the two ends of axis 2 head along on the axis axis direction processing firm screw, during the bicycle assembling, with axis 2 and left and right pedal crank 1,4 cooperate load onto after, with tightening up pad 5 and clamp-screw 6 firm being formed by connecting.The chain wheel that among the figure 3 uses for transmission.The processing technology of this device and material therefor are the same with ordinary bicycle.
Claims (1)
1. improved bicycle middle shaft driving device, constitute by axis and the left and right sides pedal crank, the chain wheel that are contained on the axis, it is characterized in that: the axis both ends are the taper square column, hole on the left and right pedal crank that is mated is the taper square hole, and the clamp-screw that tightens up pad and screw in along the screw on the axis axis direction is arranged in design on the termination of the two auxiliary section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100275145A CN101885365A (en) | 2009-05-11 | 2009-05-11 | Bicycle center shaft transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100275145A CN101885365A (en) | 2009-05-11 | 2009-05-11 | Bicycle center shaft transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101885365A true CN101885365A (en) | 2010-11-17 |
Family
ID=43071505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100275145A Pending CN101885365A (en) | 2009-05-11 | 2009-05-11 | Bicycle center shaft transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101885365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057652A (en) * | 2013-01-18 | 2013-04-24 | 天津雅迪实业有限公司 | Crank and crankshaft mounting structure for mopeds |
-
2009
- 2009-05-11 CN CN2009100275145A patent/CN101885365A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103057652A (en) * | 2013-01-18 | 2013-04-24 | 天津雅迪实业有限公司 | Crank and crankshaft mounting structure for mopeds |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101117 |