CN2205356Y - Speed changer for mountain race bicycle - Google Patents
Speed changer for mountain race bicycle Download PDFInfo
- Publication number
- CN2205356Y CN2205356Y CN 94212295 CN94212295U CN2205356Y CN 2205356 Y CN2205356 Y CN 2205356Y CN 94212295 CN94212295 CN 94212295 CN 94212295 U CN94212295 U CN 94212295U CN 2205356 Y CN2205356 Y CN 2205356Y
- Authority
- CN
- China
- Prior art keywords
- backing block
- speed changer
- wheel
- internally toothed
- toothed annulus
- 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 a planetary gear for a mountain race bicycle, which adopts a planet gear speed-changing mechanism. The planetary gear for a mountain race bicycle is mainly characterized in that the planetary gear for a mountain race bicycle is provided with a rear shaft speed-changing device arranged at the position of a rear shaft hub, a central shaft speed-changing device arranged at the position of a crank, and a control mechanism, wherein, the rear shaft speed-changing device and the central shaft speed-changing device are mainly composed of a central gear, a star wheel, an internal gear ring, a chain wheel, and a center plate, and the control mechanism is composed of a support, a stop block, a hook, a braking wire, etc. The rear shaft speed-changing device and the central shaft speed-changing device can be respectively used in a single way. The operation of each part arranged in the rear shaft speed-changing device and the central shaft speed-changing device is controlled by the control mechanism, and therefore, the goal of speed changing is achieved.
Description
The utility model relates to a kind of speed changer of mountain bicycle that is suitable for that changes existing mountain bike method for changing speed.
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.Opinion the problems referred to above practical new of determining not at present.
The purpose of this utility model is that a kind of speed changer of mountain bicycle will be provided, adopt epicyclic transmission to 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 the sprocket wheel of band star-wheel and the internally toothed annulus that on the star-wheel tooth, rotates on it, the cylindrical of internally toothed annulus has a short slot, form transmission device with upper-part, be fixed with the support of a band backing block on back vent and back prop, its backing block is pressed to torsion spring in the cylindrical short slot of internally toothed annulus and by brake cable and is affected, and forms steering unit thus.When the manipulation backing block makes it stop short slot, internally toothed annulus is motionless, and sprocket wheel drives star-wheel, star-wheel transmission flywheel makes wheel quicken to rotate, when the manipulation backing block makes it throw off short slot, sprocket wheel drives star-wheel, internally toothed annulus and flywheel and rotates synchronously together, and then wheel slowly runs, and more than is the rear axle transmission system.In addition, former peace sprocket wheel place on the pedal crank shaft, be fixed with the disc of band star-wheel and the sun gear of empty cover (this take turns be equipped with stop fast), meshing the internally toothed annulus that the outer ring is a sprocket wheel on the star-wheel tooth, constitute internal speed-changing mechanism, be fixed with the support of band drag hook on the five-way front frame beam of axis, drag hook is controlled by torsion spring and brake cable.After constituting steering unit, pedal crank and rotating when the towing brake line drag hook hook backing block on the sun gear, make it throw off disc and stop operating, then the internally toothed annulus sprocket wheel quickens rotation; Behind the releasing of brake line, drag hook is thrown off backing block under the torsion spring effect, and then backing block withstands disc again and therewith rotates, and then internally toothed annulus sprocket wheel and crank rotate synchronously, more than are the axis transmission system.Rear axle transmission system and axis transmission system can use separately separately: bicycle has high and low two speed during singly with the rear axle transmission system; Single have normal, high two speed during with the axis transmission system voluntarily, and rear axle transmission system and axis gear arrangement use the formation speed changer of mountain bicycle jointly, it have low speed, Chang Su (the common speed of a motor vehicle), at a high speed, four kinds of speed of hyper-speed.So the utility model can be equipped to the vehicle of three kinds of performances.
Application the utility model is simple, only needs monkey spanner, and instruments such as screwdriver are pulled down appropriate section on former common car or 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 former common car or the mountain bike purchased voluntarily.Maximum speed improved 137% and 53% when the utility model was compared hyper-speed, high speed with common car under pedal speed same case, during low speed laborsaving 45.8%; Maximum speed improves 100% and 29.4% during than hyper-speed, high speed with existing mountain region derailleur, during low speed laborsaving 3.9%.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, and 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 structure and the erection plan thereof according to the axis transmission system of the speed changer of mountain bicycle that the utility model proposes.Fig. 2 is the left view of Fig. 1.
Fig. 3 is structure and the erection plan thereof according to the axis transmission system of the speed changer of mountain bicycle that the utility model proposes.Fig. 4 is the left view of Fig. 3.
Describe CONSTRUCTED SPECIFICATION and service condition in detail below in conjunction with Fig. 1, Fig. 2 according to the rear axle transmission system of the speed changer of mountain bicycle that the utility model proposes.
Tighten the flywheel 5 that set has external tooth at the bicycle rear axle skin, its outside is being supported sprocket wheel 3 by being fastened on the axle shelves 2 of back on the axostylus axostyle 1 through steel ball, supporting star-wheel 7 by the minor axis of fixing on it 6 through steel ball on this sprocket wheel 3, star-wheel 7 is meshed with the external tooth of flywheel 5, and cylindrical has the internally toothed annulus 8 of short slot and star-wheel 7 to mesh and rotate around it.The articulated backing block 16 in cylindrical short slot place of internally toothed annulus 8, its tail end is headed on (referring to Fig. 2) by plate spring 11.Tighten set support 10 at back vent and back prop, backing block 12 is hinged in the framework of support 10 through bearing pin 14, and the brake cable 15 that is installed on the support 10 involves, and is pressed to the outer ring of internally toothed annulus simultaneously by torsion spring 13.After sprocket wheel 3 is affected by chain, if it is not then being pressed by torsion spring 13 and slides on the cylindrical of internally toothed annulus 8 and embed in the short slot backing block 12 when being affected by brake cable 15, so the tail end of compressing backing block 16 is thrown off sprocket wheel 3 after making it change an angle, backing block 12 withstands the short slot mouth in the twinkling of an eye, stop the rotation of internally toothed annulus, then sprocket wheel 3 affects star-wheel 7 to make flywheel 5 do twirl, and wheel also changes soon.After affecting brake cable 15 to make backing block 12 throw off the short slot mouth, backing block 16 changes an angle and withstands sprocket wheel 3 under the effect of plate spring 11, so sprocket wheel 3 drives flywheel 5 by star-wheel 7 and internally toothed annulus 8 rotates synchronously, this moment, wheel slowly ran.
Describe CONSTRUCTED SPECIFICATION and service condition in detail below in conjunction with Fig. 3, Fig. 4 according to the axis transmission system of the speed changer of mountain bicycle that the utility model proposes.
On crank 23, fixing disc 22 with minor axis 20, be hinged on the sun gear 19 on backing block 18 and the empty axle that is enclosed within crank 23, its external tooth and star-wheel 21 engagements that are bearing on the minor axis 20, star-wheel 21 again with internally toothed annulus sprocket wheel 24 on internal gearing, and supporting internally toothed annulus sprocket wheel 24 around its rotation.Support 25 is fastened on (referring to Fig. 4) on the front frame beam by clamping plate 27, in drag hook 17 is hinged on and pulls to extrapolation and by brake cable 26 in the frame groove of support 25 and by torsion spring 28.When crank rotates, when not hooking backing block 18 as drag hook 17, then this backing block withstands disc 22, disc drive this moment star-wheel 21, sun gear 19 and sprocket wheel 24 rotate synchronously, when affect brake cable 26 haul drag hook 17 be flapped toward in the time hook the backing block 18 on the sun gear 19 immediately and make it throw off disc 22, so sun gear 19 stops operating under drag hook 17 effect, and disc 22 is made with respect to the acceleration of crank 23 internally toothed annulus sprocket wheel 24 by star-wheel 21 to rotate.
In the bicycle walking process, handle the axis transmission system of control speed changer of mountain bicycle or the brake cable of rear axle transmission system respectively, can obtain four kinds of different speed: low speed, Chang Su, at a high speed, hyper-speed.
Claims (8)
1, speed changer of mountain bicycle, this change-speed box is made up of rear axle transmission system and axis transmission system two parts: by the flywheel 5 of band external tooth, fixing the sprocket wheel 3 of minor axis 6 on the disc, star-wheel 7, cylindrical has the internally toothed annulus 8 of short slot, backing block 16 that tail end is headed on by plate spring 11 and the support 10 that tightens at back vent and back prop, be installed in the backing block 12 on the support 10, bearing pin 14, torsion spring 13, the rear axle transmission system that brake cable 15 is formed, by crank 23, the disc 22 of band minor axis 20, the sun gear 19 of backing block 18 is being hinged, star-wheel 21, internally toothed annulus sprocket wheel 24 and be fastened on support 25 on the front frame beam by clamping plate 27, be installed in the drag hook 17 on the support 25, torsion spring 28, the axis transmission system that brake cable 26 is formed, it is characterized in that being fastened on the backshaft skin with the flywheel 5 of external tooth, mesh through 7 whiles of star-wheel of steel ball supporting and the external tooth and the internally toothed annulus 8 of flywheel 5 by minor axis 6 fixing on the sprocket wheel 3, backing block 12 is involved by brake cable 15, pressed to the cylindrical of internally toothed annulus 8 simultaneously by torsion spring 13, the star-wheel 21 that is supported by the minor axis on the disc 22 20 simultaneously with sun gear 19 and internally toothed annulus sprocket wheel 24 on internal gearing, in drag hook 17 is pulled to extrapolation and by brake cable 26 by torsion spring 28.
2, speed changer of mountain bicycle according to claim 1 is characterized in that sprocket wheel 3 is supporting through steel ball by being fastened on the axle shelves 2 of back on the axostylus axostyle 1.
3, speed changer of mountain bicycle according to claim 1 is characterized in that the articulated backing block 16 in cylindrical short slot place of internally toothed annulus 8, and its tail end is headed on by plate spring 11.
4, speed changer of mountain bicycle according to claim 1 is characterized in that backing block 12 is hinged in the framework of support 10 through bearing pin 14.
Its bottom just coincided with the top of backing block 16 when 5, speed changer of mountain bicycle according to claim 1 is characterized in that backing block 12 is positioned at internally toothed annulus 8 cylindrical short slot places.
6, speed changer of mountain bicycle according to claim 1 is characterized in that disc 22 is fixed on the crank 23.
7, speed changer of mountain bicycle according to claim 1 is characterized in that sun gear 19 skies are enclosed within on the axle of crank 23.
8, speed changer of mountain bicycle according to claim 1 is characterized in that drag hook 17 is hinged in the frame groove of support 25, and its hook length can be hooked backing block 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212295 CN2205356Y (en) | 1994-05-20 | 1994-05-20 | Speed changer for mountain race bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94212295 CN2205356Y (en) | 1994-05-20 | 1994-05-20 | Speed changer for mountain race bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205356Y true CN2205356Y (en) | 1995-08-16 |
Family
ID=33829198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94212295 Expired - Fee Related CN2205356Y (en) | 1994-05-20 | 1994-05-20 | Speed changer for mountain race bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205356Y (en) |
-
1994
- 1994-05-20 CN CN 94212295 patent/CN2205356Y/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 | ||
| 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 |