CN2182787Y - Planetary gear for mountain bicycle for racing use - Google Patents
Planetary gear for mountain bicycle for racing use Download PDFInfo
- Publication number
- CN2182787Y CN2182787Y CN 94204558 CN94204558U CN2182787Y CN 2182787 Y CN2182787 Y CN 2182787Y CN 94204558 CN94204558 CN 94204558 CN 94204558 U CN94204558 U CN 94204558U CN 2182787 Y CN2182787 Y CN 2182787Y
- Authority
- CN
- China
- Prior art keywords
- mountain bicycle
- flywheel
- star
- ratchet
- 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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- Steering Devices For Bicycles And Motorcycles (AREA)
- Transmission Devices (AREA)
Abstract
The utility model discloses a planetary gear for a mountain bicycle for racing use, which is matched with a mountain bicycle. The utility model can achieve speed changing without chain wheels. Compared with a prime mountain bicycle, the planetary gear for a mountain bicycle for racing use has the advantages of higher speed, compact structure, reliable and easy operation of speed changing, rapidness, high sensitivity, high safety, and beautiful appearance. The stressed state is improved. The all components run in a closed way, so the corrosion of the components is avoided. The utility model is characterized in that the planetary gear for a mountain bicycle for racing use is provided with a transmission mechanism arranged on a back shaft rod and an operating mechanism fixed on a back fork and the back shaft rod, wherein, the transmission mechanism is composed of a flywheel with external teeth, two planetary chain wheels, and webs and an internal gear ring with ratchets; the operating mechanism is composed of a bracket with a movable pawl, a brake wire, and a torsion spring. The connecting and transmission ways between the mechanisms are special.
Description
The utility model relates to the change-speed box that a kind of mountain bicycle that changes existing mountain bike method for changing speed is suitable for.
The mountain bike speed change generally adopts the multichain dish to hang and changes the chain submode, and its weak point is to hang to change the chain poor accuracy, and troublesome poeration is slow, and component strength is low, force-bearing situation is bad, serious wear, and parts all expose, easy-to-rust had both influenced service life, owed safety attractive in appearance again.Present the determine new mode of the problems referred to above of opinion not.
The purpose of this utility model is that a kind of speed changer of mountain bicycle will be provided, do not adopt extension to change chain submode speed change and reach identical or better speed changing effect, and make its compact conformation, force-bearing situation improves, operation is simple and reliable, switching speed is fast, and all drive disk assembly all seals with chain cover, is safe condition attractive in appearance.
The purpose of this utility model is achieved in that at backshaft skin installs the flywheel that a band external tooth is equipped with at the flywheel place, its sides adjacent is equipped with a rotating support cover, be fixed with on it with the sprocket wheel of two pairs of star-wheels and the flywheel of a band internally toothed annulus, the cylindrical of internally toothed annulus has ratchet, and connect together by disc and flywheel, form transmission device with upper-part.Be fixed with the support of the movable ratchet of a band on back vent and back axostylus axostyle, its movable ratchet is pressed to ratchet with torsion spring, and is affected by brake cable, forms steering unit thus.When the manipulation ratchet made it catch ratchet, internally toothed annulus was motionless, and sprocket wheel drives star-wheel, and star-wheel transmission flywheel makes wheel quicken to rotate; When the manipulation ratchet made it throw off ratchet, sprocket wheel drove star-wheel and two flywheels rotate together, and then wheel slowly runs.
Application the utility model is simple, only needs coes wrench, and instruments such as screwdriver are pulled down the polydisc speed-changing chain on former mountain bike, change the utility model and get final product.
The polydisc that the alternative Bicycle Plant of the utility model produces changes the chain speed-changing mechanism and dispatches from the factory with car load is supporting, becomes novel mountain bicycle, and the also available the utility model of user is reequiped the former mountain bike of purchasing voluntarily.The utility model is a stepless change, and maximum speed improves 54% when comparing high speed with common car with its equipped mountain bicycle under pedal speed same case, during low speed laborsaving 46.6%; Maximum speed improves 9.5% during than high speed with existing mountain region derailleur, improves 11% during low speed.The utility model compact conformation, intensity is good, and strained condition is reasonable, and variable speed operation is simple and reliable, and is rapidly sensitive, the parts inner cover, promptly safety is attractive in appearance again, has avoided corrosion, has improved service life.Equipped mountain bicycle of the present utility model is the new model of sport-racing car.
The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.
Fig. 1 is according to speed changer of mountain bicycle structure and the erection plan thereof that the utility model proposes.Fig. 2 is that the K of Fig. 1 is to view.
Describe CONSTRUCTED SPECIFICATION and service condition in detail below in conjunction with Fig. 1, Fig. 2 according to the speed changer of mountain bicycle that the utility model proposes.
Tighten the flywheel 7(of set band external tooth referring to Fig. 1 at bicycle rear axle skin 8), the left star-wheel engagement of this external tooth and star-wheel 6.Axostylus axostyle 22 tightens intrinsic shaft retaining ring 9,10 in the back, and the left end of shaft retaining ring is with steel ball supporting backshaft skin 8, and its right-hand member is supporting supporting sleeve 12 with shaft retaining ring 10 by steel ball 11.On supporting sleeve 12, be installed with side by side with lower member: the left side fastening sprocket wheel 4, two pairs of star-wheels 6 installing with the symmetry of steel ball 5 supportings are arranged on the disc of sprocket wheel 4, the right side fastening flywheel 13, riveting disc 14 on the outer ring of flywheel 13, the internally toothed annulus 15 of band ratchet in riveting on disc 14, its internal tooth and star-wheel 6 right star-wheel engagements, its ratchet acts on mutually with ratchet 21, forms transmission device with upper-part.(following referring to Fig. 2) fixing an end of support 20 with clamping plate 16 on back vent 1, the other end is enclosed within on the axostylus axostyle 22 of back, and by nut compressing.With bearing pin 18 articulated ratchets 21, the brake cable 17 that ratchet 21 is solidly set on the support 20 is drawn on support 20, and is supported in torsion spring 19 on the bearing pin 18 and oppresses and act on the internally toothed annulus 15 of band ratchet, forms steering unit with upper-part.Chain box 2 usefulness clamping plate are fixed on the back vent and (cut open because of representing that other important structure is former among the figure), cover said mechanism.
When brake cable is not affected, torsion spring 19 compressing ratchets 21 make it catch the internally toothed annulus 15 of band ratchet, so the coupled disc 14 and the outer ring of flywheel 13 all are in not rotary state, at this moment, the inner ring that chain 3 drives sprocket wheel 4, star-wheel 6 and flywheel 13 rotates together, and star-wheel 6 transmission flywheels 7 drive backshaft skin 8 and wheel fast rotational, and then bicycle advances at utmost speed.After brake cable 17 is affected, the internally toothed annulus 15 of pull-up ratchet 21 charge releasing belt ratchets, so sprocket wheel 4 drives flywheel 7 by star-wheel 6 and flywheel 13 rotates synchronously, then backshaft skin 8 and wheel rotate at a slow speed, then the bicycle ease ahead.
Claims (7)
1, speed changer of mountain bicycle, this change-speed box is by the flywheel 7 that is fastened on the band external tooth on the backshaft skin 8, by shaft retaining ring 9,10 supporting sleeves 12 by steel ball 11 supportings, the transmission device that riveting is made up of the flywheel 13 of the disc 14 of the internally toothed annulus 15 of band ratchet in the sprocket wheel 4 and the riveting that are had two pairs of star-wheels 6 by supporting sleeve 12 fastening disc, have by support 20, bearing pin 18, torsion spring 19, ratchet 21, the steering unit that brake cable 17 is formed, it is characterized in that transmission device is contained on the axostylus axostyle 22 of back and is fastenedly connected with backshaft skin 8, steering unit is fixed on back vent 1 and the back axostylus axostyle 22, and its ratchet 21 acts on the internally toothed annulus 15 of band ratchet.
2, speed changer of mountain bicycle according to claim 1 is characterized in that flywheel 7 is fastened on the backshaft skin 8, external tooth is arranged on its outer ring and is meshed with the left star-wheel of star-wheel 6.
3, speed changer of mountain bicycle according to claim 1 is characterized in that the shaft retaining ring 9,10 of back on the axostylus axostyle 22 supporting supporting sleeve 12 by steel ball 11.
4, speed changer of mountain bicycle according to claim 1 is characterized in that being installed with side by side on the supporting sleeve 12 sprocket wheel 4 and flywheel 13.
5, speed changer of mountain bicycle according to claim 1 is characterized in that having on the disc of sprocket wheel 4 two pairs of star-wheels 6 of steel ball 5 supportings.
6, speed changer of mountain bicycle according to claim 1 is characterized in that disc 14 in riveting on flywheel 13 outer rings, and the internally toothed annulus 15 of band ratchet in riveting on the disc 14, and its internal tooth is meshed with the right star-wheel of star-wheel 6.
7, speed changer of mountain bicycle according to claim 1 is characterized in that the two ends of support 20 are separately fixed on back vent 1 and the back axostylus axostyle 22, ratchet 21 is hinged on the support 20 and by brake cable 17 with bearing pin 18 and draws, and by torsion spring 19 compressings it is acted on the internally toothed annulus 15 again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94204558 CN2182787Y (en) | 1994-02-07 | 1994-02-07 | Planetary gear for mountain bicycle for racing use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94204558 CN2182787Y (en) | 1994-02-07 | 1994-02-07 | Planetary gear for mountain bicycle for racing use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2182787Y true CN2182787Y (en) | 1994-11-16 |
Family
ID=33823756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94204558 Expired - Fee Related CN2182787Y (en) | 1994-02-07 | 1994-02-07 | Planetary gear for mountain bicycle for racing use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2182787Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055896C (en) * | 1994-11-18 | 2000-08-30 | 杨胡生 | Speed changer of mountain bicycle |
| CN109018178A (en) * | 2017-06-11 | 2018-12-18 | 枣庄宝武机电科技开发有限公司 | Bicycle three keeps off automatic internal speed variator of real |
-
1994
- 1994-02-07 CN CN 94204558 patent/CN2182787Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055896C (en) * | 1994-11-18 | 2000-08-30 | 杨胡生 | Speed changer of mountain bicycle |
| CN109018178A (en) * | 2017-06-11 | 2018-12-18 | 枣庄宝武机电科技开发有限公司 | Bicycle three keeps off automatic internal speed variator of real |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |