CN206797620U - Bicycle middle shaft planetary transmission - Google Patents
Bicycle middle shaft planetary transmission Download PDFInfo
- Publication number
- CN206797620U CN206797620U CN201720618369.8U CN201720618369U CN206797620U CN 206797620 U CN206797620 U CN 206797620U CN 201720618369 U CN201720618369 U CN 201720618369U CN 206797620 U CN206797620 U CN 206797620U
- Authority
- CN
- China
- Prior art keywords
- gear
- bicycle
- axle
- fixed
- driving wheel
- 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
A kind of two-stage gearing bicycle central axis planet gear transmission, it uses the internal gear fixed with crank, and for driving wheel, planet driven gear engages while engagement with driving wheel with sun gear axle.Planet driven gear is installed on axle by bearing, and its axle is fixed with bicycle chainwheel；Sun gear axle tightens together with vehicle frame.Driving wheel delivers torque to driven pulley, driven pulley while rotation around gear shaft circular motion, by torque conduction to bicycle sprocket apparatus.Because internal tooth active tooth number is more, driven pulley and the gear shaft number of teeth are few, and when driving wheel turns around, planet driven pulley can turn multi-turn according to gear ratio around gear shaft.So the centre shaft variable speed device, can be greatly improved bicycle transmission ratio；Plus chain drive, secondary transmission fast bicycle is formed.
Description
Art
Speed change gear is the utility model is related to, especially on the premise of bicycle structure is not changed, planet is installed
Gear-shift mechanism just can become existing bicycle as secondary transmission fast bicycle.
Background technology
At present, known bicycle is to be connected by central shaft chain wheel with rear flying wheel by chain, only primary transmission, its speed
Than small, speed is low, wants to ride soon, can only play the potentiality of human muscle, frequency, the work for necessarily increasing people are strong to pedal for increasing
Degree, causes human-body fatigue.
Utility model content
In order to not increase frequency to pedal and and can improves riding speed, the utility model devises bicycle middle shaft planet tooth
Wheel speed, it is exactly using the characteristics of planetary gear construction is compact, quality is small, small volume, big gearratio, in existing bicycle
Increase by one group of gear drive on transmission axis, amplify gearratio, plus chain drive, it is quick voluntarily to form secondary transmission
Car.
Technical scheme is used by the utility model solves its technical problem：Centre shaft variable speed device uses planetary gear speed-changing
Mechanism, the internal gear fixed by a big outside with crank, three planetary gears, a sun gear are formed.Sun gear
Axle is hollow, and one end is screwed on vehicle frame with axis drum flange, and axis passes through from hollow wheel gear axis center, with fixed active
The crank of wheel is fixed with pin.When axis sun wheel is gear shaft and vehicle frame fastening is motionless, in the internal gear fixed with crank
Under the driving of driving wheel, to be engaged while driven planetary gear engages with driving wheel with sun gear axle again；Planetary gear
It is installed on axle by bearing, is revolved round the sun while rotation around sun gear；Three planetary axles are fixed with central shaft chain wheel,
Planetary gear revolution represents sprocket wheel rotation, so as to realize moment of torsion transmission of the bicycle from pedal crank to sprocket wheel.
When active internal gear rotates clockwise, driven planetary gear also rotates clockwise, while driven gear rotation around
Gear shaft circular motion, band movable sprocket rotate clockwise.Because internal tooth active tooth number is more, its internal driven gear is wrapped in
And the gear shaft number of teeth is few, therefore, when active internal gear rotate one circle when, driven gear can around sun gear shaft revolve round the sun multi-turn,
So as to reach the purpose that increase gearratio accelerates.This is primary transmission, and secondary transmission is just constituted plus original chain drive
Fast bicycle.
The beneficial effects of the utility model are to realize bicycle transmission than increasing larger, the power and speed model of transmission
Enclose and further improved including transmission efficiency.Bicycle transmission is efficiently solved than small, efficiency is low and rides the defects of slow.Planet tooth
Wheel speed is compact-sized, installed in bicycle middle shaft, does not change the other structures of bicycle, removing can also revert to commonly
Bicycle.
Brief description of the drawings
Fig. 1 is theory of mechanics schematic diagram of the present utility model.
Fig. 2 is centre shaft variable speed device example structure schematic diagram.
1. internal tooth driving wheel in figure, 2. planet driven pulleys, 3. sun wheels.
Embodiment
Internal tooth driving wheel 1 and the crank of bicycle middle shaft planetary transmission are fixed, and planet driven gear 2 is pacified with bearing
Loaded on follower shaft, its axle is fixed on sprocket wheel, and sun gear axle 3 is hollow gear shaft, is screwed in by flange
In vehicle frame on the right side of beam barrel, axis is fixed through middle beam barrel and gear axis center and the crank of fixed driving wheel with pin, this implementation
Example only welded flange one on the right side of beam barrel in vehicle frame.
Claims (2)
1. a kind of two-stage gearing bicycle central axis planet gear transmission, be using with the internal gear that crank is fixed as driving wheel, from
Moving gear is planetary gear, is engaged while driven gear engages with internal gear with sun gear axle, and driven planetary gear is in rotation
While revolved round the sun around fixed sun wheel.
2. speed changer according to claim 1, bicycle middle shaft planetary transmission is characterized in：Driving gear be with
The internal gear that crank is fixed, driven planetary gear are installed on axle by bearing, and its axle is fixed with sprocket wheel, hollow sun gear axle
Fastened with vehicle frame axis drum flange screw, axis passes through from hollow gear shaft, the crank pin of right-hand member and fixed driving wheel
It is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618369.8U CN206797620U (en) | 2017-05-18 | 2017-05-18 | Bicycle middle shaft planetary transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618369.8U CN206797620U (en) | 2017-05-18 | 2017-05-18 | Bicycle middle shaft planetary transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206797620U true CN206797620U (en) | 2017-12-26 |
Family
ID=60743717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720618369.8U Expired - Fee Related CN206797620U (en) | 2017-05-18 | 2017-05-18 | Bicycle middle shaft planetary transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206797620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109110044A (en) * | 2018-08-27 | 2019-01-01 | 佛山市梦真营机电有限公司 | A kind of internal speed-changing magnetic force accumulation of energy wheel |
| CN111531889A (en) * | 2020-05-08 | 2020-08-14 | 杭州可天信息科技有限公司 | Automatic clearance 3D printing device based on chain drive principle |
-
2017
- 2017-05-18 CN CN201720618369.8U patent/CN206797620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109110044A (en) * | 2018-08-27 | 2019-01-01 | 佛山市梦真营机电有限公司 | A kind of internal speed-changing magnetic force accumulation of energy wheel |
| CN111531889A (en) * | 2020-05-08 | 2020-08-14 | 杭州可天信息科技有限公司 | Automatic clearance 3D printing device based on chain drive principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20180518 |