CN2700227Y - Automatic variable speed case - Google Patents
Automatic variable speed case Download PDFInfo
- Publication number
- CN2700227Y CN2700227Y CN 200420018044 CN200420018044U CN2700227Y CN 2700227 Y CN2700227 Y CN 2700227Y CN 200420018044 CN200420018044 CN 200420018044 CN 200420018044 U CN200420018044 U CN 200420018044U CN 2700227 Y CN2700227 Y CN 2700227Y
- Authority
- CN
- China
- Prior art keywords
- gear
- sun wheel
- anchor shaft
- wheel
- inner 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 an automatic variable speed case, comprising an input and an output components. The input component is formed by the connection between a conical internal gear and a free wheel, and the output component is formed by the connection between a wheel hub and a planet carrier. A stationary shaft is arranged on the automatic variable speed case, and the internal gear is connected with the stationary shaft through a bearing. One end of the wheel hub is connected with the stationary shaft through the bearing, and the other end is connected with the internal gear through the bearing. A sun gear sheathed on the stationary shaft and can move axially along the stationary shaft and a spring constraining the sun gear to move axially are arranged on the automatic variable speed case. A plurality of conical planet wheels in mesh with the sun gear and the internal gear are arranged on between the sun gear and the internal gear, and the planet carrier makes the planet wheel distribute into the circle between the planet wheel and the sun gear. The utility model has the advantages of simple structure, low cost, fruitful transmission; besides, the utility model can realize automatic variable speed following resistance.
Description
Technical field
The utility model relates to a kind of automatic stepless speed variator, especially is suitable for the automatic stepless speed variator on the bicycle.
Background technology
Bicycle gear device of the prior art is generally the stepped-wheel type change-speed box or leans on the step change transmission of centrifugal mechanism effect.Above-mentioned change-speed box is complex structure, cost height not only, and must control by manual operation and realize its function.
The utility model content
Problem to be solved in the utility model provides a kind of automatic stepless speed variator, and this speed changer structure is simple, cost is low, can realize automatic stepless speed change with the size of resistance.
The technical scheme that the utility model provides is: a kind of automatic stepless speed variator, comprise input, output link, and input link forms by being the connection of cone shape inner gear and flywheel, and output link is formed by wheel hub and pinion carrier connection; Be provided with anchor shaft, inner gear connects with anchor shaft by bearing, wheel hub one end connects with anchor shaft by bearing, the other end connects with inner gear by bearing, be provided with and be set on the anchor shaft and can be along the sun wheel of anchor shaft axial motion and the spring of constraint sun crop rotation axial motion, be provided with several that be meshed with it simultaneously between sun wheel and the inner gear and be cone shape satellite gear, pinion carrier is distributed on the circumference between sun wheel and the inner gear satellite gear.
Above-mentioned sun wheel is cylindric.
Be provided with cooresponding thread groove on said fixing axle and the sun wheel simultaneously, be provided with ball in the thread groove.
The thread of above-mentioned sun wheel, satellite gear and inner gear is bull involute screw thread.
The utility model is owing to adopt said structure, and flywheel drives inner gear and satellite gear and the running of sun crop rotation planetary mechanism under external force, and satellite gear drive pinion carrier and wheel hub are rotated.Along with the increase of resistance to motion (to the application force of sun wheel greater than spring force time), satellite gear forces sun wheel relative fixed axle to move axially, this moment, the sun wheel compression spring moved toward the satellite gear small end, thereby changed transmitting ratio, reached the purpose of automatic stepless speed change.The utility model is simple in structure, cost is low, and speed changing effect is good.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A view of Fig. 1.
The specific embodiment
Referring to Fig. 1, Fig. 2, the utility model comprises input, output link, and input link connects and forms by being cone shape inner gear 3 and flywheel 5, and output link is connected by wheel hub 1 and pinion carrier 13 and forms; Be provided with anchor shaft 7, inner gear 3 connects with anchor shaft 7 by bearing 6, wheel hub 1 one ends connect with anchor shaft 7 by bearing 12, the other end connects with inner gear 3 by bearing 4, be provided with the spring 8 that is set on the anchor shaft 7 and can makes axial motion along the cylindrical sun wheel 11 and the constraint sun wheel 11 of anchor shaft 7 axial motions, be provided with cooresponding thread groove 9 on anchor shaft 7 and the sun wheel 11 simultaneously, be provided with ball 10 in the thread groove 9; Be provided with the cone shape satellite gear 2 that is that is meshed with it simultaneously between sun wheel 11 and the inner gear 3, pinion carrier 13 is distributed on the circumference between sun wheel 11 and the inner gear 3 satellite gear 2.
The thread of above-mentioned sun wheel 11, satellite gear 2 and inner gear 3 is bull involute screw thread.
The utility model can install with bicycle on, when bicycle running, the bicycle chain wheel drives the flywheel rotation by chain, and flywheel drives tapering inner gear and tapering satellite gear and the running of cylinder sun crop rotation planetary mechanism again, make satellite gear drive pinion carrier and wheel hub rotation, and then make bicycle running.When the bicycle running resistance is little (on level road), sun wheel is a maximum transmission ratio at initial position, i.e. the transmitting ratio of chain wheel and flywheel.Along with the increase of resistance to motion (as climbing time), the application force that is subjected to when sun wheel is during greater than spring force, and satellite gear forces sun wheel to center on anchor shaft rotate, and the past satellite gear small end of sun wheel compression spring moves at this moment; Sun wheel and satellite gear diameter ratio constantly change along with the increase of resistance to motion, and when resistance to motion during less than spring one stroke pre set force, sun wheel progressively is returned to the relevant position again under the effect of spring force.Thereby realized along with the size of resistance to motion changing automatically the purpose of transmitting ratio.
Claims (4)
1, a kind of automatic stepless speed variator comprises input, output link, it is characterized in that: input link forms by being the connection of cone shape inner gear and flywheel, and output link is formed by wheel hub and pinion carrier connection; Be provided with anchor shaft, inner gear connects with anchor shaft by bearing, wheel hub one end connects with anchor shaft by bearing, the other end connects with inner gear by bearing, be provided with and be set on the anchor shaft and can be along the sun wheel of anchor shaft axial motion and the spring of constraint sun crop rotation axial motion, be provided with several that be meshed with it simultaneously between sun wheel and the inner gear and be cone shape satellite gear, pinion carrier is distributed on the circumference between sun wheel and the inner gear satellite gear.
2, change-speed box according to claim 1 is characterized in that: sun wheel is cylindric.
3, change-speed box according to claim 1 and 2 is characterized in that: be provided with cooresponding thread groove on anchor shaft and the sun wheel simultaneously, be provided with ball in the thread groove.
4, change-speed box according to claim 1 and 2 is characterized in that: the thread of sun wheel, satellite gear and inner gear is bull involute screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420018044 CN2700227Y (en) | 2004-05-12 | 2004-05-12 | Automatic variable speed case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420018044 CN2700227Y (en) | 2004-05-12 | 2004-05-12 | Automatic variable speed case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2700227Y true CN2700227Y (en) | 2005-05-18 |
Family
ID=34769308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420018044 Expired - Fee Related CN2700227Y (en) | 2004-05-12 | 2004-05-12 | Automatic variable speed case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2700227Y (en) |
-
2004
- 2004-05-12 CN CN 200420018044 patent/CN2700227Y/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 |