CN86105045A - Bicyclic planet chain wheel speed unit - Google Patents
Bicyclic planet chain wheel speed unit Download PDFInfo
- Publication number
- CN86105045A CN86105045A CN 86105045 CN86105045A CN86105045A CN 86105045 A CN86105045 A CN 86105045A CN 86105045 CN86105045 CN 86105045 CN 86105045 A CN86105045 A CN 86105045A CN 86105045 A CN86105045 A CN 86105045A
- Authority
- CN
- China
- Prior art keywords
- chain wheel
- speed
- crotch
- chain
- 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.)
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Abstract
The invention provides a kind of bicyclic planet chain wheel speed unit, be specially adapted to the usefulness of ordinary bicycle speed governing.It is to utilize sprocket wheel to constitute novel planetary transmission as driver element, is that external toothing, minor sprocket are that planetary wheel, chain wheel are sun gear with the bicycle transmission chain.The motion of controlling chain wheel by crotch reaches the purpose of speed change.This planet sprocket speed changer structure is simple, intensity is high, easily manufactured, cost is low, be convenient to the maintenance, be suitable for various bicycles as change-speed box.
Description
The present invention is a kind of planetary gear derailleur of novelty, is specially adapted to the usefulness of various bicycle speed-regulatings, reaches quick, labour-saving purpose.
Existing bicycle speed-varying unit mainly contains two kinds: a kind of being contained in the rear axle window, and it is to adopt planetary wheel and ratchet device to realize speed change, and two kinds of two-speed and three speed are arranged, another kind is the multi-chain gear wheel change-speed box, stirs chain with jumping chain device and carries out speed change.These two kinds of speed changer structure more complicated, part is made difficulty, cost height in addition; The size small intensity is low, and easy damage, maintenance difficult are so be difficult to popularize except that small part high gear bicycle.
Task of the present invention is that design is a kind of with the special bicycle planet change-speed box of sprocket wheel as driver element.This speed changer structure is simple, and most of part in addition adopts the blanked part of simple shape, and cost is low, directly is contained on the bicycle middle shaft convenient maintenance.
The present invention is achieved in that it is to adopt the driver element of sprocket wheel as change-speed box, utilizes cycle chain to be external toothing, and chain wheel is a sun gear, and minor sprocket is a planetary wheel, has constituted special planetary gear derailleur.Motion by the control chain wheel realizes speed change.
Planetary gear derailleur is to be combined with pillar on disk by the crotch that an end is fixed on the chain wheel, or combines with latch on the vehicle frame and to reach the speed change purpose.The convertible two kinds of speed of bicyclic planet chain wheel speed unit, fast block is identical with existing market sale bicycle fast block.
Because adopt sprocket wheel as the planetary transmission motor element, external toothing is replaced by cycle chain, sun gear adopts chain wheel, has simplified speed changer structure greatly.Change-speed box directly is contained in and has replaced the bicycle floral disc on the axis of right side, has reduced parts, is convenient to maintenance.Sprocket wheel is than common planetary transmission pick-off gear intensity height, and is not fragile.Most of simultaneously part in addition adopts blanked part, and is easy to process, low cost, suitable popularizing in the plurality of specifications bicycle.
For example: on 20 English inch BMX (Bicycle Motocross), load onto change-speed box of the present invention, can obviously see when fast block, also slightly faster than 28 English inch bicycles.
28 English inch bicycle pedals whenever turn around and can advance:
D * π * r
1=0.72 * 3.14 * 2.4=5.43(rice)
After loading onto change-speed box, 20 English inch bicycles can reach:
D * π * r
1* r
2=0.52 * 3.14 * 48/18 * 4/3=5.82(rice)
Wherein D is wheel external diameter, r
1Be the original speed ratio of bicycle, r
2Be transmission gear ratio of the present invention.
Below with reference to accompanying drawing invention is described in further detail:
Fig. 1 is a concrete structure front view of the present invention.
Fig. 2 is a lateral plan of the present invention.
Fig. 3 is the front view of chain wheel of the present invention and hook thereof.
Fig. 4 is chain wheel of the present invention and hook side sectional view.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, bicyclic planet chain wheel speed unit: disk (1) has 4 chain bearing surfaces by iron plate making, and (7) Shang ， And are fixed on the bicycle middle shaft together to be contained in the bicycle right threading; 4 minor sprockets (2) of the same number of teeth are contained on the disk (1) and can rotate flexibly.Chain wheel (3) is contained on two iron plates by cycle chain lining ring and roller and constitutes, and is contained on the axis and meshes with four minor sprockets (2).Crotch (4) is fixed on the chain wheel (3), and an end is equipped with extension spring, and the other end is processed into circular arc and colludes with pillar (5) and match
Variable speed control is such work: when crotch (4) and pillar (5) when combining chain wheel (3) be fixed with minor sprocket (2) and keep normal speed this moment; When crotch (4) and latch (6) when combining chain wheel (3) by pinning, minor sprocket (2) not only revolved round the sun with foot-operated when rotated foot-operated (8), but also around chain wheel (3) rotation, made driving chain obtain quickening, bicycle has been accelerated speed, and speed can reach 4/3 times.The latch operating handle is fixed on the Handlebar of bicycle, and is convenient and reliable with the brake steel wire attended operation.
Claims (4)
1, a kind of bicyclic planet chain wheel speed unit of being made up of external toothing, center gear, satellite gear is characterized in that be sun gear as planetary transmission external toothing, several minor sprockets (2) for planetary wheel, chain wheel (3) with cycle chain.
2, according to the planetary gear derailleur of claim 1, it is characterized in that controlling the chain wheel motion by crotch, reach the purpose of speed change.By an end be fixed on the chain wheel (3) crotch (4) be fixed on disk (1) on pillar (5) speed change not when combining, chain wheel (3) is fixed when crotch (4) is pinned by latch (6), and minor sprocket (2) also produces spinning motion except revolving round the sun, the speed of a motor vehicle is just accelerated.
3, according to the planetary gear derailleur of claim 1 or 2, it is characterized in that the change-speed box crotch is stamped to form, is fixed on the chain wheel (3) by steel disc, external arc is identical with the chain wheel external arc, and an end is equipped with extension spring, the other end is processed with and the semicircle crotch of pillar same diameter.
4,, it is characterized in that chain wheel is contained on two iron plates by cycle chain collar and roller to constitute according to the planetary gear derailleur of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86105045A CN86105045B (en) | 1986-08-13 | 1986-08-13 | Bicyclic planet chain wheel speed unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86105045A CN86105045B (en) | 1986-08-13 | 1986-08-13 | Bicyclic planet chain wheel speed unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86105045A true CN86105045A (en) | 1987-03-04 |
| CN86105045B CN86105045B (en) | 1988-01-20 |
Family
ID=4802698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86105045A Expired CN86105045B (en) | 1986-08-13 | 1986-08-13 | Bicyclic planet chain wheel speed unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86105045B (en) |
-
1986
- 1986-08-13 CN CN86105045A patent/CN86105045B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86105045B (en) | 1988-01-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |