CN2160610Y - Changeable speed transmission mechanism for bicycle - Google Patents
Changeable speed transmission mechanism for bicycle Download PDFInfo
- Publication number
- CN2160610Y CN2160610Y CN 93216101 CN93216101U CN2160610Y CN 2160610 Y CN2160610 Y CN 2160610Y CN 93216101 CN93216101 CN 93216101 CN 93216101 U CN93216101 U CN 93216101U CN 2160610 Y CN2160610 Y CN 2160610Y
- Authority
- CN
- China
- Prior art keywords
- flywheel
- wheel
- chain
- driving wheel
- sprocket 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
Links
Abstract
The utility model relates to a changeable speed transmission mechanism for bicycles. A flywheel assembly is arranged on a flywheel axle, and the flywheel assembly is provided with two flywheels with unequal tooth number; a bicycle frame is fixedly provided with an intermediate wheel whose position is adjustable and two chain wheels with different diameters installed on an intermediate axle; a driving wheel is connected with a chain wheel by a chain, and the other chain wheel, two flywheels of the flywheel assembly, and the intermediate wheel are connected by another chain. The secondary transmission mechanism achieves the goals of high speed and labor saving, as the diameter of the driving wheel is not big; the flywheel axle is provided with the flywheel assembly, and thus the utility model has two changeable speed ratios; the utility model has simple changeable speed method, so long as the rotary direction of the driving wheel is changed; thus the mechanism has low cost and convenient repair.
Description
The utility model relates to the transmission device of a kind of variable speed bicycle, particularly a kind of variable speed bicycle.
Existing bicycle generally has only the one-level transmission, and the speed of a motor vehicle is low.Various mountain bikes or sport car are stirred the different sprocket wheels of chain engages by governor and are come speed change, its complex structure, the cost height, poor reliability, maintenance difficult, in addition, existing bicycle speedup is with the number of teeth that increases wheel disc initiatively and reduces the flywheel number of teeth and realize, for this reason since its structural limitations initiatively on wheel disc the number of teeth can not increase too much, and limited the possibility that improves the speed of a motor vehicle by a relatively large margin.In addition for driving laborsaving and prevent that flywheel from producing gear teeth undercut,, thereby also further limited the further raising of the speed of a motor vehicle so the number of teeth can not be very little on the flywheel.Simultaneously speedup also can cause and increases propulsive effort greatly in the above described manner.
The purpose of this utility model is for overcoming the deficiencies in the prior art, a kind of speed of a motor vehicle that can further improve is provided, and labour-saving variable speed bicycle transmission device.
The purpose of this utility model is to realize like this, on the flywheel shaft (3) of variable speed bicycle, flywheel group (7) is housed, flywheel (7a), (7b) that flywheel group (7) has two numbers of teeth not wait, in the idle wheel (9) that is fixed with an adjustable positions on the vehicle frame (8) sprocket wheel (5), (6) different with two diameters on being installed on a tween drive shaft (2), chain (10) connects driving wheel (4) and sprocket wheel (5), and chain (11) connects flywheel (7a), (7b) and the idle wheel (9) of sprocket wheel (6), flywheel group (7).
The utility model is owing to adopted the secondary transmission, and the driving wheel diameter is less, this foot-operated crank that is equivalent to extend, thus can reach i.e. high speed, laborsaving again.Because the flywheel group is housed,, solved the above-mentioned disadvantage that existing bicycle exists again on flywheel shaft so have two converter speed ratios.This variable speed bicycle transmission device low cost of manufacture, easy to maintenance.
Describe the utility model in detail below in conjunction with accompanying drawing.
Fig. 1, variable speed bicycle transmission device scheme drawing
Fig. 2, plummer block seat and clamping plate are the scheme of installation on the cant beam before bicycle
Outside main drive shaft 1 and flywheel shaft 3, be provided with tween drive shaft 2 as shown in Figure 1, on tween drive shaft 2, be fixed with sprocket wheel 5 and sprocket wheel 6.Tween drive shaft 2 is installed on the bearing seat 12, as shown in Figure 2.Bearing seat 12 is welded on the clamping plate 16, and clamping plate 15,16 long axis directions center has half slot, and respectively there are two holes the half slot both sides of clamping plate 15,16.Its middle clamp plate 15 is four and connects unthreaded hole that clamping plate 16 are four and connect the silk hole.Clamping plate 15,16 are contained on the vehicle frame 8 preceding cant beams, again clamping plate 15,16 are used bolt after mixing up.Driving wheel 4 is connected by chain 10 with sprocket wheel 5.Sprocket wheel 6 also is connected by chain 11 by idle wheel 9 with flywheel 7a, the 7b of flywheel group 7.Driving wheel 4 is 32 teeth, and sprocket wheel 5 is 18 teeth, and sprocket wheel 6 is 44 teeth, and flywheel 7a is that 16 teeth and flywheel 7b are 32 teeth.
Driving wheel 4 and sprocket wheel 5 are in vehicle frame 8 one sides, and the 7a of flywheel group 7,7b and sprocket wheel 6 are at the opposite side of vehicle frame 8.
As shown in Figure 1, idle wheel 9 is contained on the bracing frame 13.Bracing frame 13 is fixed by bolts in the elongated hole on the adapter plate 14, and adapter plate 14 is packed on the vehicle frame 8.This elongated hole is for regulating the tightness of chain 11.
When cw drives driving wheel 4, chain 10 driving directions be B to A, under chain 10 drove, sprocket wheel 5 also clockwise rotated.Because of sprocket wheel 5 and sprocket wheel 6 are packed on the tween drive shaft 2, so sprocket wheel 6 also clockwise rotates, the driving direction of chain 11 is that C is to D.Thereby the flywheel 7a that drives flywheel group 7 clockwise rotates.Because the commutation effect of idle wheel 9, flywheel 7b is for rotating counterclockwise, and can not drive flywheel shaft 3 because of flywheel 7b conter clockwise changes, and has only flywheel 7a can drive flywheel shaft 3 rotations, so its transmitting ratio is about 5.
When driving wheel 4 conter clockwises drive, chain 10 driving directions be A to B, sprocket wheel 5 conter clockwises change, sprocket wheel 6 also conter clockwise changes.Chain 11 driving directions are the flywheel 7a conter clockwise commentaries on classics of D to C flywheel group 7, and flywheel 7b then is that cw changes, and this moment, flywheel 7a can not drive flywheel shaft 3 rotations, have only flywheel 7b to drive flywheel shaft 3 commentaries on classics, just drive wheel and advance, and this moment, transmitting ratio then was about 2.3.
Therefore the utlity model has high speed and two speed of low speed, and method for changing speed is simple, only needs to change the rotation direction of driving wheel 4.
Claims (3)
1, a kind of variable speed bicycle transmission device, include vehicle frame, flywheel shaft, main drive shaft, flywheel, driving wheel and chain, driving wheel is installed on the main drive shaft, it is characterized in that on flywheel shaft (3), being equipped with flywheel group (7), the flywheel (7a) that flywheel group (7) has two numbers of teeth not wait, (7b), at the idle wheel (9) that is fixed with an adjustable positions on the vehicle frame (8) sprocket wheel (5) different with two diameters on being installed on tween drive shaft (2), (6), chain (10) connects driving wheel (4) and sprocket wheel (5), and chain (11) connects sprocket wheel (6), the flywheel (7a) of flywheel group (7), (7b) and idle wheel (9).
2, variable speed bicycle transmission device according to claim 1, it is characterized in that described idle wheel (9) is to be contained on the bracing frame (13), bracing frame (13) is installed in the elongated hole on the adapter plate (14) with bolt, and adapter plate (14) is fixedly mounted on the vehicle frame (8).
3, variable speed bicycle transmission device according to claim 1 is characterized in that flywheel group (7) on described driving wheel (4) and the flywheel shaft (3) is respectively in the both sides of vehicle frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93216101 CN2160610Y (en) | 1993-06-17 | 1993-06-17 | Changeable speed transmission mechanism for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93216101 CN2160610Y (en) | 1993-06-17 | 1993-06-17 | Changeable speed transmission mechanism for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2160610Y true CN2160610Y (en) | 1994-04-06 |
Family
ID=33796378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93216101 Expired - Fee Related CN2160610Y (en) | 1993-06-17 | 1993-06-17 | Changeable speed transmission mechanism for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2160610Y (en) |
-
1993
- 1993-06-17 CN CN 93216101 patent/CN2160610Y/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 |