CN2219850Y - Variable-speed gear for bicycle - Google Patents
Variable-speed gear for bicycle Download PDFInfo
- Publication number
- CN2219850Y CN2219850Y CN 94223828 CN94223828U CN2219850Y CN 2219850 Y CN2219850 Y CN 2219850Y CN 94223828 CN94223828 CN 94223828 CN 94223828 U CN94223828 U CN 94223828U CN 2219850 Y CN2219850 Y CN 2219850Y
- Authority
- CN
- China
- Prior art keywords
- gear
- shaft
- variable
- cliding
- gear block
- 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 variable-speed gear for bicycles, mainly comprising a driving shaft, a variable-speed shaft and an output shaft. The driving shaft is provided with a four-gear block; the variable-speed shaft is provided with a four-slide gear block and a two-gear block; the output shaft is provided with a two-slide gear block; a shifting fork mechanism is used for controlling the four-slide gear block, and an auxiliary shifting fork mechanism is used for controlling the two-slide gear block. The utility model has the advantages of strong applicability, reasonable structural design, rapid and convenient shifting, cleanness for use, a little fault, long service life, etc., and prevents trouser legs from being dirty.
Description
The utility model relates to a kind of rickshaw change speed gear box, particularly a kind of derailleur.
There is the problem of the following aspects in the transmission system of existing variable speed bicycle: one, in speed regulation process, continually chain is taken turns being switched to another and taking turns by this, thereby increased the wearing and tearing of parts such as chain, wheel disc, flywheel, influenced its service life; Two, can not disposablely finish by the speed change overall process of low gear,, then must readjust the angle of change-speed box if finish the overall process of its speed change to top-gear.Therefore, take a lot of trouble, bother and lose time; Three, at the gear of maximum wheel disc and minimum flywheel and minimum wheel disc and maximum flywheel, the gradient of chain is too big, causes difficulty of car operation; Four, flywheel structure complexity, inconvenient maintenance, particularly its guide wheel is nearer apart from ground, when running into special road surface, easily meets accident; Five because part is many and complex structure, therefore chain cover can't be installed, the easy like this bottom of s trouser leg of making dirty, and period of service is long slightly, and transmission system part itself and the car body part greasy dirt around it increase, and be very unhygienic.
The purpose of this utility model is to provide a kind of derailleur of osed top gear change.
Derailleur provided by the utility model comprises that parallel rotation is placed on axle drive shaft, variable shaft and the output shaft in the transmission system housing; The four-gear block of different size is installed on described axle drive shaft; At the corresponding tetrad cliding gear of four-gear block that is equipped with on the described variable shaft on a dual gear and and the axle drive shaft; Be provided with on the described output shaft one with variable shaft on the corresponding bigeminy cliding gear of dual gear; The fork mechanism of a described tetrad cliding gear; The secondary fork mechanism of a described bigeminy cliding gear; Stretching out the outer axle drive shaft two ends of housing turns greatly with pedal respectively and is connected; An end that stretches out the outer output shaft of housing is captiveed joint with a wheel disc.
The utility model compared with prior art, applicability is strong, and is rational in infrastructure, gear shift is convenient, rapidly, use clean, be difficult for the bottom of s trouser leg of making dirty, and fault is few, long service life.
Fig. 1 is the scheme of installation of derailleur of the present utility model;
Fig. 2 is the utility model derailleur structural representation.
Below in conjunction with accompanying drawing, specific embodiment of the utility model is described in detail.
As depicted in figs. 1 and 2, derailleur of the present utility model comprises a housing 38, is provided with parallel rotation and places axle drive shaft 23, variable shaft 24 and output shaft 25 in housing 38.One of fixed installation has the gear 11,12,13 and 14 four-gear blocks 5 that constitute of four descending arrangements of different size on described axle drive shaft 23.Be provided with one and 6 and dual gears 7 of four-gear block 5 corresponding tetrad slip teeth wheels on described variable shaft 24, described tetrad cliding gear 6 is made of the gear 15,16,17 and 18 of four ascending arrangements of different size.Described dual gear 7 is made of the gear 19 and 20 of two ascending arrangements.On described output shaft 25, be provided with a bigeminy cliding gear 8 that constitutes by the individual gear 21 and 22 of two descending arrangements.Described fork mechanism is made of fork 26, fork bar 27 and spanner 2.By described fork mechanism tetrad cliding gear 6 is moved axially, make gear 11 and 15 engagements, or make gear 12 and 16 engagements, or make gear 13 and 17 engagements, or make gear 14 and 18 engagements, thereby can obtain four kinds of different transmission speed ratios.Described bigeminy cliding gear 8 is by a secondary fork mechanism controls, and described secondary fork mechanism is made of secondary fork 31, secondary fork bar 32, cable wire 35, secondary spanner 3, bigeminy cliding gear pull back spring 29 and cable wire pull back spring 34.Cable wire 35 1 ends are connected with secondary fork bar 32, and the other end is connected with secondary spanner 3 on being fixed on handlebar.Pull back spring 29 1 ends are near gear 21 1 sides, and the other end is fixed on the output shaft 25 by spring collar 30.Pull back spring 34 is fixed on the housing 38 by spring collar 33.The two ends of described axle drive shaft 23 are turned 36 greatly with pedal respectively and are connected, and captive joint with wheel disc 37 at an end of output shaft 25.
In the bicycle running process, as need I shelves speed change, spanner 2 is pulled out speed change I gear, minimum gear 11 on the axle drive shaft 23 and 15 engagements of the maximum gear on the variable shaft 24, gear 19 in the dual gear 7 and 21 engagements of the gear in the bigeminy cliding gear 8; As need II retaining speed change, spanner 2 is pulled out speed change II gear, this moment gear 11 and 15 jump out of meshs, gear 12 and 16 engagements; As need III shelves speed change, spanner 2 is pulled out speed change III gear, this moment gear 12 and 16 disengagements, gear 13 and 17 engagements; As need IV shelves speed change, spanner 2 is pulled out speed change IV gear, this moment gear 13 and 17 disengagements, gear 14 and 18 engagements.As need V～VIII shelves speed change, by secondary spanner 3, cable wire 35, secondary fork bar 32 and secondary fork 31 gear 21 and gear 19 are thrown off, make gear 22 and gear 20 engagements simultaneously, then spanner 2 is pulled out successively I～IV gear, just can obtain V～VIII shelves speed change.
Claims (7)
1, a kind of derailleur is characterized in that comprising that parallel rotation is placed on the axle drive shaft in the housing of transmission system, variable shaft and output shaft; The four-gear block of different size is installed on described axle drive shaft; At the corresponding tetrad cliding gear of four-gear block that is equipped with on the described variable shaft on a dual gear and and the axle drive shaft; Be provided with on the described output shaft one with variable shaft on the corresponding bigeminy cliding gear of dual gear; The fork mechanism of a described tetrad cliding gear; The secondary fork mechanism of a described bigeminy cliding gear; Stretching out the outer axle drive shaft two ends of housing turns greatly with pedal respectively and is connected; An end that stretches out the outer output shaft of housing is captiveed joint with a wheel disc.
2, derailleur according to claim 1 is characterized in that described four-gear block is made of four gears, and it puts in order to descending.
3, derailleur according to claim 1 is characterized in that described tetrad cliding gear is made of four gears, and it puts in order to ascending.
4, derailleur according to claim 1 is characterized in that described dual gear is made of two gears, and it puts in order to ascending.
5, derailleur according to claim 1 is characterized in that described bigeminy cliding gear is made of two gears, and it puts in order to descending.
6, derailleur according to claim 1 is characterized in that described fork mechanism is made up of fork, fork bar and spanner.
7, derailleur according to claim 1 is characterized in that described secondary fork mechanism is made of secondary fork, secondary fork bar, cable wire, bigeminy cliding gear pull back spring and cable wire pull back spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94223828 CN2219850Y (en) | 1994-10-21 | 1994-10-21 | Variable-speed gear for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94223828 CN2219850Y (en) | 1994-10-21 | 1994-10-21 | Variable-speed gear for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2219850Y true CN2219850Y (en) | 1996-02-14 |
Family
ID=33837417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94223828 Expired - Fee Related CN2219850Y (en) | 1994-10-21 | 1994-10-21 | Variable-speed gear for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2219850Y (en) |
-
1994
- 1994-10-21 CN CN 94223828 patent/CN2219850Y/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 |