CN201186728Y - Middle axle speed-variator of bicycle - Google Patents
Middle axle speed-variator of bicycle Download PDFInfo
- Publication number
- CN201186728Y CN201186728Y CNU2008200122526U CN200820012252U CN201186728Y CN 201186728 Y CN201186728 Y CN 201186728Y CN U2008200122526 U CNU2008200122526 U CN U2008200122526U CN 200820012252 U CN200820012252 U CN 200820012252U CN 201186728 Y CN201186728 Y CN 201186728Y
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- Prior art keywords
- gear
- bicycle
- change
- phantom
- variable
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Abstract
The utility model provides a bicycle middle axle derailleur, which comprises a front gear arranged on a middle axle of a bicycle and a rear gear arranged on a rear wheel axle of the bicycle. The bicycle middle axle derailleur is characterized in that the derailleur also comprises a change gear, a speed transforming gear and a follow-up gear; the speed transforming gear has the largest diameter; the change gear is coaxially arranged on the front gear and is capable of rotating toward an opposite direction of the front gear; the change gear engages with the speed transforming gear; the follow-up gear is coaxially fixed on the speed transforming gear; and the front gear, the follow-up gear and the rear gear are connected via a driving chain. The bicycle middle axle derailleur provided in the utility model solves the problem that the riding on an uphill road or a rugged road is labor consuming in the prior art; has the advantages of low manufacturing cost and easy implementation; and is suitable for popularization and application, especially suitable to be used in areas with poor road conditions.
Description
Technical field:
The utility model belongs to the change-speed box that is applied in the bicycle.
Background technology:
It is bikedom that China is known as, especially in some combination areas of city and country and rural area, bicycle is people's requisite walking-replacing tool of going on a journey especially, yet when people run into uphill road or potted road surface by bike, pedaling understand gruelling, must get off to shove along, why have drawback like this and be because the front gear that present bicycle type of belt drive all adopts axis directly drives backgear on the axletree so that the form that bicycle advances by chain, and the transfer ratio of power is more direct in this kind form, can the road surface difficulty to pedal that then will inevitably cause going up a slope be a problem demanding prompt solution and make a bicycle of relatively saving muscle power when the upward slope road surface.
Summary of the invention:
Goal of the invention: the utility model provides a kind of bicycle middle shaft change-speed box, and its purpose is to solve bicycle in the past expends muscle power when running into road surface inferior problem.
Technical scheme: the utility model is achieved through the following technical solutions:
The bicycle middle shaft change-speed box is included in front gear on the bicycle middle shaft and the backgear on the bicycle rear shaft in this change-speed box, it is characterized in that: also include change gear, variable gear and phantom gear in this device; Change gear is arranged on the front gear, and it is coaxial and can do rightabout rotation with front gear with front gear; Change gear meshes with variable gear; Phantom gear is coaxial to be fixed on the variable gear; The diameter of variable gear is greater than the diameter of phantom gear; Front gear, phantom gear and backgear are connected by driving chain.
Variable gear can select for use tooth gear also can select the sleeve-barrel roollr toothed chain wheel for use.
Advantage and effect:
The utility model provides a kind of bicycle middle shaft change-speed box, it is according to the big more labour-saving more of the arm of force in physics principle, on the basis of original front gear and the single driving of backgear, increased change gear again, variable gear and phantom gear, the diameter of variable gear wherein greater than the diameter of phantom gear to reach the effect that increases the arm of force, the stretcher of only need kicking backward during operation can be realized arm of force switching process, its operation is very easy, this bicycle middle shaft speed changer structure advantages of simple, processing ease, do not change existing bicycle form, not additional any operating sequence; When running into uphill road or potted road surface when having solved in the past by bike, it stares at the problem of effort of car, and cheap, realize easily, relatively be fit to popular applying, especially be fit to some road conditions bad areas.
Description of drawings:
Fig. 1 is a transmission principle scheme drawing of the present utility model.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is done nearly step explanation:
The utility model provides a kind of bicycle middle shaft change-speed box, comprises the front gear 1 that is arranged on the bicycle middle shaft in this change-speed box, is arranged on backgear, change gear 2, variable gear 3 and phantom gear 4 on the hind axle; Front gear 1 on the bicycle middle shaft is provided with change gear 2, and change gear 2 and front gear 1 are coaxial and can do rightabout rotation with front gear 1; Change gear 2 is with variable gear 3 engagements, and variable gear 3 can select for use common tooth gear also can select the sleeve-barrel roollr toothed chain wheel for use; Phantom gear 4 coaxial being fixed on the variable gear 3; The diameter of variable gear 3 greater than the diameter of phantom gear 4 so that increase the arm of force in the transmission process, to reach the purpose of saving muscle power; Front gear 1, phantom gear 4 are connected by driving chain with backgear, realize cruising and the process that reduces physical demands;
In the middle of process by bike, only need pedal the stretcher that is arranged on the bicycle middle shaft normally during cruising, drive front gear 1 and rotate promptly as shown in Figure 1 the clickwise of pressing the A1 direction forward, the driving chain of this moment drives the backgear rotation through phantom gear 4 backs, the front gear 1 of this moment is a driving gear, phantom gear 4 and backgear become driven sprocket, this moment backgear can drive that bicycle quick rotates so that bicycle as cruising in the past; And this moment, variable gear 3 is followed phantom gear 4 and is rotated forward, because variable gear 3, therefore drives the rotation backward of change gear 2 natures with change gear 2 engagement, this moment, variable gear 3 was with being a Fu power between the change gear 2; And when running into road surface, abrupt slope or potted road surface, continue the normal like this stretcher of pedaling again, only can allow the people feel effort, and this moment, only need stretcher is rotated promptly as shown in Figure 1 the left-hand revolution by the A2 direction backward, front gear 1 can not followed stretcher and rotated backward this moment, and stretcher has been given 2 one of the change gears actv. power of rotation backward at this moment; Make the change gear 2 that is arranged on the front gear 1 follow the rhythm rotation backward together of stretcher, because change gear 2 and variable gear 3 engagements, therefore change gear 2 drives variable gear 3 clickwise forward, and at this moment, variable gear 3 is with between the change gear 2 being an actv. power; Meanwhile be fixed on the also rotation forward together of phantom gear 4 on the variable gear 3, phantom gear 4 rotates forward by chain drive front gear 1 and backgear as driving gear at this moment, and therefore backgear also drives wheel; Because the diameter of variable gear 3 greater than phantom gear 4, makes the arm of force of the power that drives phantom gear 4 rotations increase, so the people can feel laborsaving in operation.
The utility model is easy and simple to handle, saves physical purpose by the conversion realization of power, and this device relatively is applicable to the area that road conditions are bad.
Claims (2)
1, bicycle middle shaft change-speed box is included in front gear (1) on the bicycle middle shaft and the backgear on the bicycle rear shaft in this change-speed box, it is characterized in that: also include change gear (2), variable gear (3) and phantom gear (4) in this device; Change gear (2) is arranged on the front gear (1), and it is coaxial and can do rightabout rotation by same front gear (1) with front gear (1); The same variable gear of change gear (2) (3) engagement; Phantom gear (4) is coaxial to be fixed on the variable gear (3); The diameter of variable gear (3) is greater than the diameter of phantom gear (4); Front gear (1), phantom gear (4) are connected by driving chain with backgear.
2, bicycle middle shaft change-speed box according to claim 1 is characterized in that: variable gear (3) can select for use tooth gear also can select the sleeve-barrel roollr toothed chain wheel for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200122526U CN201186728Y (en) | 2008-04-18 | 2008-04-18 | Middle axle speed-variator of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200122526U CN201186728Y (en) | 2008-04-18 | 2008-04-18 | Middle axle speed-variator of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201186728Y true CN201186728Y (en) | 2009-01-28 |
Family
ID=40309746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200122526U Expired - Fee Related CN201186728Y (en) | 2008-04-18 | 2008-04-18 | Middle axle speed-variator of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201186728Y (en) |
-
2008
- 2008-04-18 CN CNU2008200122526U patent/CN201186728Y/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20100418 |