CN86105045B - Bicyclic planet chain wheel speed unit - Google Patents
Bicyclic planet chain wheel speed unit Download PDFInfo
- Publication number
- CN86105045B CN86105045B CN86105045A CN86105045A CN86105045B CN 86105045 B CN86105045 B CN 86105045B CN 86105045 A CN86105045 A CN 86105045A CN 86105045 A CN86105045 A CN 86105045A CN 86105045 B CN86105045 B CN 86105045B
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- CN
- China
- Prior art keywords
- chain wheel
- speed
- chain
- crotch
- planetary
- 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
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Abstract
The present invention provides a planetary chain wheel speed variator for bicycles, which is especially suitable for regulating speed for the ordinary bicycles. The present invention utilizes a chain wheel as a transmission component to form the novel planetary speed variator, uses a transmission chain of the bicycle as an outer tooth ring, uses a small chain wheel as a planetary gear, and uses a chain wheel as a center gear. The present invention controls the movement of the chain wheel by a curved hook to regulate speed; the planetary chain wheel variator has the advantages of simple structure, high intensity, convenient manufacture, low cost and convenient maintenance, and can be used as the variators of various bicycles.
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, 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; The size small intensity is low, and easy damage, maintenance difficult are so be difficult to popularize except that the high-grade bicycle of small part.
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 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 combine 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.Simultaneously most of part adopts blanked part, and is easy to process, low cost, suitable popularizing in the plurality of specifications bicycle.
For example: on 20 inches BMX (Bicycle Motocross), load onto change-speed box of the present invention, can obviously see when fast block, also slightly faster than 28 inches bicycles.
28 inches bicycle pedals whenever turn around and can advance:
D * π * r
1=0.72 * 3.14 * 2.4=5.43(rice)
20 inches bicycles can reach after loading onto change-speed box:
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 is contained on the bicycle right threading (7), and is fixed on the bicycle middle shaft together; 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 arc hook and matches with pillar (5).
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 (1)
1, a kind of bicyclic planet chain wheel speed unit of forming by external toothing, center gear, satellite gear, it 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, control 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; The change-speed box crotch is stamped to form by steel disc, is fixed on the chain wheel (3), and 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; Chain wheel is contained on two iron plates by cycle chain collar and roller and constitutes.
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 CN86105045A (en) | 1987-03-04 |
| CN86105045B true 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 |
|---|---|
| CN86105045A (en) | 1987-03-04 |
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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 |