CN2159357Y - Bicycle chainless transmission - Google Patents
Bicycle chainless transmission Download PDFInfo
- Publication number
- CN2159357Y CN2159357Y CN 92215880 CN92215880U CN2159357Y CN 2159357 Y CN2159357 Y CN 2159357Y CN 92215880 CN92215880 CN 92215880 CN 92215880 U CN92215880 U CN 92215880U CN 2159357 Y CN2159357 Y CN 2159357Y
- Authority
- CN
- China
- Prior art keywords
- axle
- gear
- bevel
- center
- bevel 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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- Transmission Devices (AREA)
Abstract
The utility model relates to a bicycle chainless transmission device, comprising a foot-step shaft, a planet cone gear transmission mechanism, a one-way clutch and a shaft skin. The transmission device is characterized in that the foot-step shaft is used to drive the central cone gear of the planet cone gear transmission mechanism to rotate and the central cone gear drives the shaft skin to rotate through the one-way clutch. The utility model has the advantages of simple structure, small volume compared with a chain transmission device and high efficiency, and the utility model can be installed on vehicles driven by man-power such as bicycles, tricycles, bicycles for children, etc.
Description
The utility model relates to a kind of Chainless-drive device for bicycle.
In the prior art, bicycle drive is based on chain gear, and along with the development of technology, people have expected drivings device such as orthogonal circle finishing bevel gear cuter, right angle helical wheel.Yet these drivings device exist volume big, the weakness that driving efficiency is low, and the drawback difficult, that installation requirement is high, fault rate is high is made in also existing of having.Along with further developing of technology, people have expected installing at the axle intracutaneous possibility of planetary gear mechanism again, and CN882201921 is exactly an example up-to-date in this class driving device.But there is the narrow weakness of gear range in this driving device.
The purpose of this utility model is to provide a kind of CN882201921 of overcoming gear range narrow Chainless-drive device for bicycle.
The technical solution that the utility model adopts is: by pedal axle (1), the bevel planet gear transmission device, free-wheel clutch (8) and axle skin (3) are formed Chainless-drive device for bicycle, the bevel planet gear transmission device comprises that center bevel gear (4) and (7) are enclosed within respectively on the pedal axle (1) rotationally, simultaneously, center bevel gear (4) is captiveed joint with vehicle frame again, center bevel gear (7) is captiveed joint with free-wheel clutch (8), has a bevel planet gear (6) at least between center bevel gear (4) and (7), and mesh with center bevel gear (4) and (7) oblique respectively, bevel planet gear (6) is enclosed within on the bevel planet gear axle (5) rotationally, bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique, and center bevel gear (7) is connected with axle skin (3) by interior ratchet free-wheel clutch (8).
Chainless-drive device for bicycle described in the utility model has simple in structurely, and gear range is wide, can satisfy the required any transmitting ratio demands of vehicle such as bicycle, three-wheel vehicle, perambulator.
Accompanying drawing 1 is the driving device scheme drawing of CN882201921;
Accompanying drawing 2 is driving device scheme drawings of the present utility model;
Accompanying drawing 3 is embodiment section-drawings of the present utility model;
Accompanying drawing 4 is (Z of the present utility model
4-Z
7) with the graph of a relation of i;
Accompanying drawing 5 is graphs of a relation of a of the present utility model and i;
Accompanying drawing 6 is (Z of the present utility model
4-Z
7) with the graph of a relation of a.
Below the contrast accompanying drawing further is illustrated the utility model.
Fig. 1 is the driving device scheme drawing of CN882201921.This driving device is mainly by pedal axle (1), axle skin (3), free-wheel clutch (8), center bevel gear (4) and (7), at least one bevel planet gear (6) is formed, pedal axle (1) passes the centre hole of a skin (3) rotationally, and in axle skin (3), captive joint with bevel planet gear axle (5) quadrature, center bevel gear (4) and (7) are enclosed within on the pedal axle (1) rotationally, bevel planet gear (6) is meshed with center bevel gear (4) and (7) respectively, center bevel gear (4) is fixed with vehicle frame, and center bevel gear (7) is connected with axle skin (3) by free-wheel clutch (8).The weakness of this driving device is that pedal axle (1) is captiveed joint with bevel planet gear axle (5) quadrature, force bevel planet gear (6) to mesh with center bevel gear (4) and (7) quadrature respectively, therefore, the number of teeth of center bevel gear (4) and (7) can only equate, that is to say that its transmitting ratio can only be 2.0; If seek out than 2.0 big or little transmitting ratios, just must be by adopting displacement method machining center finishing bevel gear cuter (4) and (7), have a mind to cause their number of teeth poor, but known technology shows, the number of teeth difference of Xing Chenging is extremely limited like this, that is to say that its transmitting ratio can not obviously can not satisfy the transmitting ratio requirement of bicycle than 2.0 big or little a lot of.Yet, think according to known transmitting ratio formula in the specification sheets of CN882201921: as long as the number of teeth of tune-up center finishing bevel gear cuter (4) and (7) can satisfy the speed ratio requirement of bicycle fully.Through facts have proved, this point is single sees it is possible from formula, but is impossible during actual fabrication, and this is the tangible weakness of CN882201921.
Fig. 2 is a driving device scheme drawing of the present utility model.This driving device mainly is made up of pedal axle (1), axle skin (3), a free-wheel clutch (8), a center bevel gear (4), at least one bevel planet gear (6) and a center bevel gear (7).Pedal axle (1) passes the centre hole of a skin (3) rotationally, and in axle skin (3), captive joint with bevel planet gear axle (5) oblique, center bevel gear (4) and (7) are enclosed within on the pedal axle (1) rotationally, bevel planet gear (6) is enclosed within on the bevel planet gear axle (5) rotationally, bevel planet gear (6) is between center bevel gear (4) and (7), and mesh with center bevel gear (4) and (7) oblique respectively, center bevel gear (4) is captiveed joint with vehicle frame, center bevel gear (7) is captiveed joint with interior ratchet free-wheel clutch (8), and center bevel gear (7) links to each other with axle skin (3) by interior ratchet free-wheel clutch (8).
Fig. 3 is an embodiment section-drawing of the present utility model.In this embodiment, pedal axle (1) passes the centre hole of a skin (3) by two bearings, a bearing outside of one end has center bevel gear (4), center bevel gear (4) and otic placode (2) are by being threaded, otic placode (2) passes through bolted connection with vehicle frame, and center bevel gear (4) is connected with axle skin (a 3) inside face by bearing; A bearing outside of the other end of pedal axle (1) has ear plate base (9), and ear plate base (9) and otic placode (2) be by being threaded, and otic placode (2) and vehicle frame are by bolted connection, and ear plate base (9) is connected with skin (a 3) inside face by bearing; Center bevel gear (7) is enclosed within on the bigger cylinder of the one section diameter in pedal axle (1) middle part rotationally, and be connected with interior ratchet free-wheel clutch (8) by screw thread, interior ratchet free-wheel clutch (8) is connected with axle skin (3) inside face, the middle part oblique captive joint of pedal axle (1) bevel planet gear axle (5), bevel planet gear (6) is enclosed within on the bevel planet gear axle (5) rotationally, and meshes with center bevel gear (4) and (7) oblique respectively.Like this, when pedal axle (1) when just changeing, interlock bevel planet gear axle (5) just changes, bevel planet gear axle (5) drives bevel planet gear (6) and revolves round the sun around pedal axle (1), bevel planet gear (6) star bevel gear shaft (5) rotation of detouring again simultaneously, because center bevel gear (4) is captiveed joint with vehicle frame, so bevel planet gear (6) drives the hand of rotation acceleration rotation of center bevel gear (7) along pedal axle (1), center bevel gear (7) drives axle skin (3) by interior ratchet free-wheel clutch (8), and then drives whole wheel revolutions.The bevel planet gear (6) that only drawn among Fig. 3, the utility model but are good with two or three to the quantity of bevel planet gear (6) without limits.
The transmitting ratio of the utility model transmission device is:
i＝1＋Z
4／Z
7
Z in the formula
4And Z
7The number of teeth of expression center bevel gear (4) and (7), i represents the transmitting ratio of pedal axle (1) and center bevel gear (7).
Fig. 4 is (Z of the present utility model
4-Z
7) with the graph of a relation of i.(Z among the figure
4-Z
7) number of teeth poor of expression center bevel gear (4) and (7), i represents the transmitting ratio of pedal axle (1) and center bevel gear (7).As (Z
4-Z
7)＞0 o'clock, i＞2; (Z
4-Z
7)=0 o'clock, i=2; (Z
4-Z
7)＜0 o'clock, i＜2.
Fig. 5 is the graph of a relation of a of the present utility model and i.A represents the angle that bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique among the figure, and i represents the transmitting ratio of pedal axle (1) and center bevel gear (7).When a＜90 °, i＞2; In the time of a=90 °, i=2; During a＞90 °, i＜2.
Fig. 6 is (Z of the present utility model
4-Z
7) with the graph of a relation of a.(Z among the figure
4-Z
7) number of teeth poor of expression center bevel gear (4) and (7), a represents the angle that bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique.As (Z
4-Z
7)＞0 o'clock, a＜90 °; As (Z
4-Z
7)=0 o'clock, a=90 °; As (Z
4-Z
7)＜0 o'clock, a＞90 °.At when design, given required transmitting ratio, can obtain the poor (Z of the number of teeth of center bevel gear (4) and (7)
4-Z
7), and then the suitable gear of definite center bevel gear (4) and (7), determine the suitable gear of bevel planet gear (6) again, can determine the angle a that bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique, thereby obtain the preliminary parameter of the given required part of transmitting ratio of design.
By more as can be known, Chainless-drive device for bicycle of the present utility model not only can make bicycle structure simpler, and moulding is more attractive in appearance, and weight is lighter and handier, and cost is lower.The utility model biggest advantage is that bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique, bevel planet gear (6) is meshed with center bevel gear (4) and (7) oblique respectively, thereby enlarged the gear range of the utility model driving device, satisfy the required various transmitting ratio requirement of various bicycles, very easily accept and implemented by producer for people.
Claims (3)
1, a kind of Chainless-drive device for bicycle, by pedal axle (1), the bevel planet gear transmission device, free-wheel clutch (8) and axle skin (3) are formed, it is characterized in that: the bevel planet gear transmission device comprises that center bevel gear (4) and (7) are enclosed within respectively on the pedal axle (1) rotationally, simultaneously, center bevel gear (4) is captiveed joint with vehicle frame again, center bevel gear (7) is captiveed joint with free-wheel clutch (8), has a bevel planet gear (6) at least between center bevel gear (4) and (7), and mesh with center bevel gear (4) and (7) oblique respectively, bevel planet gear (6) is enclosed within on the bevel planet gear axle (5) rotationally, and bevel planet gear axle (5) is captiveed joint with pedal axle (1) oblique.
2, Chainless-drive device for bicycle according to claim 1 is characterized in that center bevel gear (7) is connected with axle skin (3) by free-wheel clutch (8).
3, Chainless-drive device for bicycle according to claim 1 is characterized in that free-wheel clutch (8) is interior ratchet free-wheel clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215880 CN2159357Y (en) | 1992-07-17 | 1992-07-17 | Bicycle chainless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92215880 CN2159357Y (en) | 1992-07-17 | 1992-07-17 | Bicycle chainless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2159357Y true CN2159357Y (en) | 1994-03-23 |
Family
ID=33764258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92215880 Expired - Fee Related CN2159357Y (en) | 1992-07-17 | 1992-07-17 | Bicycle chainless transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2159357Y (en) |
-
1992
- 1992-07-17 CN CN 92215880 patent/CN2159357Y/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 |