CN2044238U - Central shaft transmission device for bycicles - Google Patents
Central shaft transmission device for bycicles Download PDFInfo
- Publication number
- CN2044238U CN2044238U CN 88218968 CN88218968U CN2044238U CN 2044238 U CN2044238 U CN 2044238U CN 88218968 CN88218968 CN 88218968 CN 88218968 U CN88218968 U CN 88218968U CN 2044238 U CN2044238 U CN 2044238U
- Authority
- CN
- China
- Prior art keywords
- axis
- central shaft
- transmission device
- utility
- model
- 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 - Lifetime
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- Steering Devices For Bicycles And Motorcycles (AREA)
Abstract
The utility model discloses an improved central shaft transmission device for bicycles, which is characterized in that both ends of the central shaft are conical square columns, holes of the left and the right rudder pedal cranks which are adapted to the conical square columns are conical square holes, and the rudder pedal cranks are fastened with the central shaft by a fastening pad and a screw which is screwed along the axial direction of the central shaft. The utility model has the advantages that the mechanical strength of the central shaft transmission device for bicycles is improved, the service life and the safety are increased, and the utility model is suitable for the improvement for various kinds of bicycles.
Description
The utility model relates to a kind of improved bicycle middle shaft driving device, is made of axis and the left and right pedal crank, the chain wheel that are installed on the axis.
So far, it is the axis of garden cylindricality that our used bicycle middle shaft driving device has both ends, a left side of matching with these axis both ends, Kong Weiyuan cylindrical hole on the right pedal crank, when the two is connected, adopt bolt-type structure crosswise fixed, so on an axis and a left side, all design on the right pedal crank pin hole is arranged, thereby reduced the mechanical strength of this driving device, because the application force of latch, make an axis and a left side, right pedal crank connecting link hole very easily is out of shape, and latch itself is also easy to wear and distortion, the repair demolition inconvenience, 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.
The purpose of this utility model 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 utility model is to realize 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, design 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 utility model has adopted above-mentioned structure, test through up to a hundred times, proof has improved the mechanical strength of 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.
Be illustrated below in conjunction with drawings and Examples:
Fig. 1 is a constructional drawing of the present utility model,
Fig. 2 A of the present utility model is to view.
As shown in FIG., taper square column (7) is processed at axis (2) both ends, be contained on the axis left and right pedal crank (1,4) mating holes and make corresponding taper square hole, at the two ends head of axis (2) along the fastening screw of processing on the axis axis direction, during the bicycle assembling, with axis (2) and left and right pedal crank (1,4) cooperate load onto after, be fastenedly connected and form with tightening up pad (5) and clamp-screw (6).The chain wheel that (3) among the figure are used 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 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 |
|---|---|---|---|
| CN 88218968 CN2044238U (en) | 1988-10-17 | 1988-10-17 | Central shaft transmission device for bycicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88218968 CN2044238U (en) | 1988-10-17 | 1988-10-17 | Central shaft transmission device for bycicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044238U true CN2044238U (en) | 1989-09-13 |
Family
ID=4851362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88218968 Expired - Lifetime CN2044238U (en) | 1988-10-17 | 1988-10-17 | Central shaft transmission device for bycicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044238U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037829C (en) * | 1993-07-23 | 1998-03-25 | 罗伯特·施密德 | Bottom bracket assembly for bicycles, keep-fit apparatuses and the like |
| CN1091707C (en) * | 1997-01-21 | 2002-10-02 | 本田技研工业株式会社 | Foot-plate and lower apron board combined structure of motor scooter type motor-driven bicycle |
| CN101181922B (en) * | 2006-10-27 | 2012-05-23 | Hb悬架产品有限公司 | Improved axle for fixing in claw of fork leg for a bicycle |
-
1988
- 1988-10-17 CN CN 88218968 patent/CN2044238U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037829C (en) * | 1993-07-23 | 1998-03-25 | 罗伯特·施密德 | Bottom bracket assembly for bicycles, keep-fit apparatuses and the like |
| CN1091707C (en) * | 1997-01-21 | 2002-10-02 | 本田技研工业株式会社 | Foot-plate and lower apron board combined structure of motor scooter type motor-driven bicycle |
| CN101181922B (en) * | 2006-10-27 | 2012-05-23 | Hb悬架产品有限公司 | Improved axle for fixing in claw of fork leg for a bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |