CN2219255Y - Three-stage speed variator for bottom bracket bearing of bicycle - Google Patents
Three-stage speed variator for bottom bracket bearing of bicycle Download PDFInfo
- Publication number
- CN2219255Y CN2219255Y CN 95230361 CN95230361U CN2219255Y CN 2219255 Y CN2219255 Y CN 2219255Y CN 95230361 CN95230361 CN 95230361 CN 95230361 U CN95230361 U CN 95230361U CN 2219255 Y CN2219255 Y CN 2219255Y
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- CN
- China
- Prior art keywords
- axis
- sprocket
- speed
- bicycle
- shaft
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- 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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- Transmissions By Endless Flexible Members (AREA)
Abstract
The utility model relates to a three-stage speed variator for the center shaft of the bicycle, comprising a center shaft, an auxiliary shaft, and a cam rotary variable-speed shaft. The center shaft is provided with the floating driving chain wheels with low, middle and high speeds and a finally driving driven chain wheel which is fixedly integrated with a big fly wheel; fixedly driven chain wheels with low, middle and high speeds, and a finally driving chain wheel are correspondingly arranged on the auxiliary shaft; the chain wheels which are corresponding to the center shaft and the auxiliary shaft are respectively a set of independent chain drive mechanism. The cam rotary variable-speed shaft is provided with a variable-speed fork which controls a sliding key to enable the driving chain wheels on the center shaft to connect with the center shaft. The utility model is used for improvement on the existing common bicycle and the manpowered pedal bicycle, and thus the utility model has variable-speed function, low cost and convenient installation, and is very suitable.
Description
The utility model relates to a kind of bicycle or the manpower bicycle uses the axis three-range transmission.
Bicycle is divided into derailleur and common car (being non-derailleur).Because variable speed bicycle cost height, so the bicycle of people's use now, still common car (non-derailleur) is in the majority.Existing ordinary bicycle travels on level road and thinks to ride soon and must pedal with strength because of no speed-changing mechanism, makes the people feel more tired.When especially running into uphill way, because muscle power, majority can only carry out.Therefore, it is necessary existing ordinary bicycle to be installed additional speed regulation device.
The purpose of this utility model provides a kind of bicycle middle shaft three-range transmission that is applicable to existing ordinary bicycle (non-derailleur) repacking usefulness, and this change-speed box cost is low, easy for installation, also is applicable to other manpower bicycle's use simultaneously.
For achieving the above object, the utility model adopts following technical scheme to realize: the bicycle middle shaft three-range transmission is provided with axis, pay axle and cam and revolve the shaft type variable shaft, axis is provided with the low speed drive sprocket, the middling speed drive sprocket, the high speed drive sprocket and with big flywheel fixedly the final transmission of all-in-one-piece by movable sprocket, also correspondence is provided with low speed by movable sprocket on pair axle, middling speed is by movable sprocket, at a high speed by movable sprocket and final transmission drive sprocket, be total to each and be fixed as one by movable sprocket and a final transmission drive sprocket and a pair axle, a pair axle leans on fixed cover and fixed support plate and axis to fix.Each sprocket wheel on the axis and with big flywheel fixedly the final transmission of all-in-one-piece floated on the axis by movable sprocket, the isolation of rolling pearl is housed between each sprocket wheel and the axis.Axis and each the self-corresponding master who pays axle by movable sprocket and final transmission master, be separately one by movable sprocket and overlap independently chain drive, by chain separate connection separately.Be provided with slide key in the keyway of axis, the rotary variable shaft of cam is provided with gear shift fork, makes each drive sprocket and axis on the axis realize connecting by gear shift fork control slide key.To be installed on ordinary bicycle or the manpower bicycle by the bicycle middle shaft three-range transmission that said structure constitutes, can realize invention of the present utility model purpose.
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view.
Among the figure, 1 is axis, 2 is axis low speed drive sprocket, and 3 is axis middling speed drive sprocket, and 4 is axis high speed drive sprocket, 5 is middle and high speed wheel slide key, 6 are low speed wheel slide key, and 7 is the rotary variable shaft of cam, and 8 for paying axle low speed by movable sprocket, 9 for paying the axle middling speed movable sprocket of leaping up, 10 for paying axle at a high speed by movable sprocket, 11 be the final transmission of axis by movable sprocket, 12 for paying spool, 13 for paying the axle fixed cover, 14 is the fixed cover supporting plate, and 15 is the big flywheel of bicycle, and 16 for paying axle final transmission drive sprocket, 17 is gear shift fork, and 18 are change-speed box expansion cover.
The bicycle middle shaft three-range transmission is by axis 1 and drive sprocket 2,3,4 thereof, big flywheel 15 and with the fixing final transmission follower 11 of all-in-one-piece of big flywheel, pay axle 12 and by movable sprocket, 8,9,10 and pay axle a final transmission drive sprocket 16, rotary variable shaft 7 of cam and gear shift fork 17 thereof are formed.The low speed drive sprocket 2 that axis 1 is provided with is 9 teeth, and corresponding by movable sprocket 8 (14 tooth) with low speed on paying axle 12, revolution ratio is 1: 0.64, has reduced rotating speed, has increased climbing power.Middling speed drive sprocket 3 on the axis 1 and the middling speed of paying on the axle 12 are 11 teeth by movable sprocket, and revolution ratio is 1: 1.High speed drive sprocket 4 on the axis is 14 teeth, high speed on cooresponding with it pair of axle 12 is 9 teeth by movable sprocket 10, revolution ratio is 1: 1.55, so just improved 0.55 times than original ordinary bicycle speed, flat pavement running need not be pedaled also with strength can improve the speed of a motor vehicle, pays respectively being fixed on pair axle by movable sprocket 8,9,10 and the final transmission drive sprocket 16 of pair axle on the axle 12.Each drive sprocket 2,3,4 on the axis 1 and with big flywheel 15 all-in-one-piece final drive sprockets 11 are floating being contained on the axis, all there is the rolling pearl to isolate between its each wheel and the axis, make it not friction, can guarantee three drive sprockets on the axis 1 like this, a job is wherein arranged, all the other two just rotate freely, are not subjected to the restriction of axis.Drive sprocket work on the axis (being that drive sprocket and axis connect) is to realize by the slide key in the middle shaft key groove.The rotary variable shaft 7 of cam is provided with gear shift fork 15, by gear shift fork 17 control slide key actions.Cam revolves axle 7 and is subjected to change-speed box to draw the control of stay cord outward.The utility model is installed on the ordinary bicycle, its power is by corresponding to movable sprocket by on the chain transmission payment axle of certain drive sprocket on the axis, final drive sprocket on the axle of paying through an intermediary in a business deal passes to that fixedly all-in-one-piece is finally by movable sprocket with big flywheel again, and the trailing wheel of bicycle just given transmission of power by so big flywheel.This speed changer structure compactness, length=110mm * 65mm * 65mm.The utility model is used for existing ordinary bicycle (non-derailleur) and manpower bicycle's transformation, makes it have speed changing function, cost is low, and is easy for installation, very suitable.
Claims (1)
1. a bicycle middle shaft three-range transmission comprises axis (1), big flywheel (15), it is characterized in that this change-speed box is provided with axis, pays axle and the rotary variable shaft of cam; Axis (1) be provided with low speed drive sprocket (2), middling speed drive sprocket (3), high speed drive sprocket (4) and with big flywheel (15) fixedly the final transmission of all-in-one-piece by movable sprocket (11); Pay on the axle (12) also correspondence be provided with low speed by movable sprocket (8), middling speed by movable sprocket (9), at a high speed by movable sprocket (10) and final transmission drive sprocket (16), its each by movable sprocket and final transmission drive sprocket with pay spool (12) and be fixed into one; Each sprocket wheel on the axis (1) reaches with the big final transmission of flywheel (15) all-in-one-piece and is floated on the axis (1) by movable sprocket (11), the rolling pearl is housed between each sprocket wheel and the axis (1) isolates; Axis (1) goes up and pays each self-corresponding master on the axle (12), by movable sprocket and final transmission master, be separately one by movable sprocket and overlap independently chain drive, by chain separate connection separately; Be provided with slide key in the keyway of axis, the rotary variable shaft of cam (7) is provided with gear shift fork (17), makes each drive sprocket and axis on the axis realize connecting by gear shift fork (17) control slide key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230361 CN2219255Y (en) | 1995-02-27 | 1995-02-27 | Three-stage speed variator for bottom bracket bearing of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95230361 CN2219255Y (en) | 1995-02-27 | 1995-02-27 | Three-stage speed variator for bottom bracket bearing of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2219255Y true CN2219255Y (en) | 1996-02-07 |
Family
ID=33875222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95230361 Expired - Fee Related CN2219255Y (en) | 1995-02-27 | 1995-02-27 | Three-stage speed variator for bottom bracket bearing of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2219255Y (en) |
-
1995
- 1995-02-27 CN CN 95230361 patent/CN2219255Y/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 |