CN201165315Y - Planetary planet wheel speed variator - Google Patents
Planetary planet wheel speed variator Download PDFInfo
- Publication number
- CN201165315Y CN201165315Y CNU2008200558658U CN200820055865U CN201165315Y CN 201165315 Y CN201165315 Y CN 201165315Y CN U2008200558658 U CNU2008200558658 U CN U2008200558658U CN 200820055865 U CN200820055865 U CN 200820055865U CN 201165315 Y CN201165315 Y CN 201165315Y
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- CN
- China
- Prior art keywords
- planetary
- wheel
- pivoted frame
- internally toothed
- external gear
- 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
The utility model relates to special transmission devices for bicycles and in particular relates to a planetary gearbox for a bicycle. The planetary gearbox comprises an annular gear, an external gear wheel, a rotating stand and a planetary gear wheel; wherein the rotating stand is fixedly matched with a centre shaft; the planetary gear wheel is fixed on the rotating stand; the annular gear and the external gear wheel are respectively meshed with the planetary gear wheel; the external gear wheel is fixedly connected with a chain wheel; a detent is arranged between the rotating stand and the annular gear; a braking drum is arranged on the annular gear. The planetary gearbox has the advantage of simple and compact structure and can shift speed continuously and can shift speed or drive torque freely according to the road conditions of whether the road is smooth or has a slope.
Description
Technical field
The utility model relates to the driving device class that is specially adapted for bicycle, is specifically related to a kind of bicycle planetary gear.
Background technology
The derailleur that uses in the prior art nearly all is in transmitting by gear or sprocket wheel at present, what of the size of pick-off gear diameter or the number of teeth are its speed change generally all be by, thereby reach the purpose of rotation speed change, but because speed-change process normally carries out in advancing, its comfort feature and continuity all can't be guaranteed.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of bicycle planetary gear is provided, this change-speed box utilizes in the mechanical drive, one of differential gear train input is rotated the phenomenon that two mouths can be differential, by controlling turning to and rotating speed of one of them output fluted disc, realize the change of another output fluted disc rotating speed is regulated.
The utility model purpose realizes being finished by following technical scheme:
A kind of bicycle planetary gear, comprise axis, sprocket wheel, it is characterized in that this change-speed box comprises internally toothed annulus, external gear, pivoted frame and planetary wheel, wherein pivoted frame and axis heavy keying fit, captive joint planetary wheel on pivoted frame, internally toothed annulus and external gear mesh with planetary wheel respectively, and external gear is captiveed joint with sprocket wheel, between pivoted frame and internally toothed annulus, ratchet is set, brake wheel is set on the internally toothed annulus.
Described pivoted frame is that key cooperates with the axis heavy keying fit.
Captive joint by bearing pin between described pivoted frame and the planetary wheel.
The utility model has the advantages that simple in structure, compact, beautiful and applicable, speed change is reliable, convenient, speed change is continuous, can be according to the free change speed of different road conditions or the driving torque on level road or sloping road.
Description of drawings
Accompanying drawing 1 is the A-A cutaway view of the utility model structural representation;
Accompanying drawing 2 is the utility model structural representation;
Accompanying drawing 3 the utility model principle schematic;
Accompanying drawing 4 is the utility model internally toothed annulus structural representation;
Accompanying drawing 5 is the B-B part sectional view of accompanying drawing 4;
Accompanying drawing 6 is the utility model pivoted frame structural representation;
The specific embodiment
The utility model feature and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technical personnel of the same trade:
Shown in Fig. 1-6, label 1-17 represents respectively: pedal 1, axis 2, sprocket wheel 3, internally toothed annulus 4, planetary wheel 5, external gear 6, brake wheel 7, crank 8, ratchet 9, pivoted frame 10, flat key 11, bearing 12, rivet 13, bearing pin 14, packing ring 15, back-up ring 16, torsion spring 17.
Present embodiment comprises internally toothed annulus 4, external gear 6, pivoted frame 10, planetary wheel 5, axis 2, sprocket wheel 3, pivoted frame 10 cooperates fixing with axis 2 by flat key 11, on pivoted frame 10, pass through bearing pin 14 captive joint planetary wheels 5, internally toothed annulus 4, external gear 6 mesh with planetary wheel 5 respectively, external gear 6 is captiveed joint by rivet 13 with sprocket wheel 3, ratchet 9, torsion spring 17 are set between pivoted frame 10 and internally toothed annulus 4, brake wheel 7 is set on the internally toothed annulus 4.Planetary wheel 5 cooperates with internally toothed annulus 4, external gear 6 respectively.The braking of present embodiment brake wheel 7 can be connected to the Handlebar of bicycle place by brake cable, to make things convenient for brake operating.
Present embodiment is when concrete the use, when bicycle use in the level road state, need propulsive effort hour, brake wheel 7 brakings, internally toothed annulus 4 is by stop, and axis 2 rotates a week, and external gear 6 and sprocket wheel 3 rotated more than two weeks, all numbers of its rotation depend on the size of converter speed ratio, and the size of this numerical value is (number of teeth of the number of teeth/external gear 6 of internally toothed annulus 4)+1.When bicycle use in the upward slope state, when needing propulsive effort big, brake wheel 7 is not braked, under the unidirectional action of ratchet 9, internally toothed annulus 4 and external gear 6 rotate simultaneously.When bicycle use in the level road road conditions during the bad or sloping road of minor grade, under the required propulsive effort place fluctuation status, brake wheel 7 brakings, internally toothed annulus 4 is subjected to a certain size braking force, and the control of this braking force size changes with the variation of required propulsive effort size, when the needs propulsive effort is big, reduce braking force, in like manner, can reducing along with required propulsive effort, strengthen braking force, internally toothed annulus 4 and external gear 6 are differential state.
Claims (3)
1. bicycle planetary gear, comprise axis, sprocket wheel, it is characterized in that this change-speed box comprises internally toothed annulus, external gear, pivoted frame and planetary wheel, wherein pivoted frame and axis heavy keying fit, captive joint planetary wheel on pivoted frame, internally toothed annulus and external gear mesh with planetary wheel respectively, and external gear is captiveed joint with sprocket wheel, between pivoted frame and internally toothed annulus, ratchet is set, brake wheel is set on the internally toothed annulus.
2. a kind of bicycle planetary gear according to claim 1 is characterized in that described pivoted frame and axis heavy keying fit are that key cooperates.
3. a kind of bicycle planetary gear according to claim 1 is characterized in that captiveing joint by bearing pin between described pivoted frame and the planetary wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200558658U CN201165315Y (en) | 2008-02-29 | 2008-02-29 | Planetary planet wheel speed variator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200558658U CN201165315Y (en) | 2008-02-29 | 2008-02-29 | Planetary planet wheel speed variator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201165315Y true CN201165315Y (en) | 2008-12-17 |
Family
ID=40190698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200558658U Expired - Fee Related CN201165315Y (en) | 2008-02-29 | 2008-02-29 | Planetary planet wheel speed variator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201165315Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797951B (en) * | 2010-02-08 | 2013-01-09 | 蒋国良 | Chain wheel device and electric vehicle |
-
2008
- 2008-02-29 CN CNU2008200558658U patent/CN201165315Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797951B (en) * | 2010-02-08 | 2013-01-09 | 蒋国良 | Chain wheel device and electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20100229 |