CN2920808Y - Bicycle middle axle mechanism - Google Patents
Bicycle middle axle mechanism Download PDFInfo
- Publication number
- CN2920808Y CN2920808Y CNU2006200616527U CN200620061652U CN2920808Y CN 2920808 Y CN2920808 Y CN 2920808Y CN U2006200616527 U CNU2006200616527 U CN U2006200616527U CN 200620061652 U CN200620061652 U CN 200620061652U CN 2920808 Y CN2920808 Y CN 2920808Y
- Authority
- CN
- China
- Prior art keywords
- gear
- middle axle
- axis
- chain
- bicycle
- 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 discloses a bicycle middle axle mechanism, a middle axle (1) is arranged on a five-way Pipe (9), a gear (2) and a gear (3) are arranged on the middle axle (1), wherein, the gear (2) is fixed firmly with the middle axle, the other gear (3) can rotate, a countershaft (4) is arranged on the one side of the middle axle (1), a gear (5) and a gear (6), which are joggled each other, are respectively fixed on firmly on the countershaft (4); a keyboard (7) is fixed firmly on the gear (3). The middle axle drives the chain by a double-stage driving, the rotate speed of the chain can be quicker than that of the middle axle namely the drive ratio between the chain and the middle axle can be more than one, therefore, to reduce the diameter of the little chain can also ensure a reasonable journey without reducing the chain pitch or the diameter of the little flywheel.
Description
Technical field
The utility model relates to a kind of middle axis mechanism of bicycle, particularly a kind of middle axis mechanism of chainlet dish bicycle.
Technical background
Popular in recent years steamboat footpath bicycle, particularly folding bicycle, performance car, the swing over compound rest diameter of part battery-driven car, perambulator is all very little.Wheel is little, and vehicle frame is also corresponding to be reduced, but chain drum reduces, and its number of teeth also reduces.The chain drum number of teeth reduces, and under flywheel unmodified situation, the transmitting ratio of itself and flywheel diminishes, and makes bicycle can not guarantee reasonably " stroke ".(stroke is that crank rotates a circle distance that bicycle travelled).For guaranteeing comfortable riding, the design of bicycle should guarantee rational stroke.Reducing at chain drum under the condition of diameter (number of teeth), is the diameter and the number of teeth of corresponding minimizing flywheel for a kind of mode that obtains reasonable stroke.But the number of teeth that the reducing of flywheel diameter can make flywheel very little, and produce uneven sense dynamic when riding, and the flywheel number of teeth very little, makes the transmission stress concentration on less surface, making the wearing and tearing aggravation, and driving efficiency reduces, and influences service life.For reducing the number of teeth of chain drum and flywheel, and guarantee rational stroke, also having a kind of mode is the pitch that reduces chain, so that all corresponding number of teeth that increased of swedged chain drum and flywheel, keep transmitting ratio, but chain pitch traditional in the bicycle is 12.7mm, and the bicycle that has changed chain pitch does not match with traditional outer change-speed box again.
The utility model content
The purpose of this utility model is to provide a kind of and is reducing the chain drum diameter but do not change under the condition of chain pitch, still can guarantee the bicycle middle shaft mechanism of reasonable stroke.
Bicycle middle shaft of the present utility model mechanism, axis is loaded in the five-way, two gears are housed on the axis, one of them and axis connect firmly, another can rotate relative to axis, axis one side is equipped with countershaft abreast, be fixedly connected with on the countershaft two respectively with axis on two gear mating gear, chain drum is fixed on the rotating gear of relative axis.
Bicycle middle shaft of the present utility model mechanism, axis is meshed by the gear that connects firmly separately with countershaft, another gear that countershaft connects firmly is meshed with the rotating gear that is placed on the axis, when axis rotates, rotate by the gear driven countershaft that connects firmly, countershaft rotates relative to the rotating gear of axis by gear driven again, rotates thereby drive chain drum.It realizes transmission between axis and the chain drum can making the rotating speed of the rotating speed of chain drum greater than axis by the two-stage transmission, also be chain drum with in interaxle transmitting ratio greater than 1.Thereby reduce the diameter of chain drum, can guarantee that also bicycle has rational stroke, and the mode that does not need the diameter by reducing flywheel or change chain pitch guarantees the reasonable shape journey of bicycle.Simultaneously, for derailleur, the chain drum diameter is little, and the stroke of chain is little during its speed change, thereby convenient, reliable.
Description of drawings
Fig. 1 is an a kind of bicycle middle shaft mechanism;
Fig. 2 is an a kind of bicycle middle shaft mechanism;
Fig. 3 removes the lateral plan of crank and chain drum for Fig. 2.
The specific embodiment
A kind of bicycle middle shaft mechanism, as Fig. 1, two gears 2,3 are housed on its axis 1, gear 2 connects firmly with axis 1, gear 3 rotating being placed on the axis 1, and a side of axis 1 is equipped with countershaft 4 abreast, be fixedly connected with on it two respectively with axis 1 on two gear mating gear 5,6, gear 5 is meshed with gear 2, and gear 6 is meshed with gear 3, and chain drum 7 is fixed on the gear 3.Gear 2 is a with the transmitting ratio of gear 5, and gear 6 is b with the transmitting ratio of gear 3.When a * b>1, under the situation of the diameter that reduces chain drum, can guarantee that also bicycle has rational stroke.
As Fig. 2, Fig. 3, bunching ring 8 can be installed in the both sides of the five-way 9 of transmission device, and it can improve the intensity of five-way 9, can prevent that again dirt sand from entering in the five-way 9, thereby can reduce the wearing and tearing of transmission device, prolongs the service life of transmission device.
Claims (2)
1, a kind of bicycle middle shaft mechanism, it is characterized in that: axis (1) is loaded in the five-way (9), two gears (2), (3) are housed on the axis (1), one of them gear (2) connects firmly with axis, another gear (3) axis relatively is rotatable, one side of axis (1) is equipped with countershaft (4) abreast, be fixedly connected with on the countershaft (4) two respectively with last two gears of axis (1) (2), (3) mating gear (5), (6), chain drum (7) is fixed on the gear (3).
2, bicycle middle shaft according to claim 1 mechanism, it is characterized in that: bunching ring (8) is equipped with in the both sides of five-way (9).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2006200616527U CN2920808Y (en) | 2006-07-14 | 2006-07-14 | Bicycle middle axle mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2006200616527U CN2920808Y (en) | 2006-07-14 | 2006-07-14 | Bicycle middle axle mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2920808Y true CN2920808Y (en) | 2007-07-11 |
Family
ID=38253287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNU2006200616527U Expired - Fee Related CN2920808Y (en) | 2006-07-14 | 2006-07-14 | Bicycle middle axle mechanism |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2920808Y (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101823408A (en) * | 2010-04-26 | 2010-09-08 | 盛永瑞 | Bicycle |
CN111661232A (en) * | 2020-05-11 | 2020-09-15 | 沈焕春 | Bicycle with novel power device |
-
2006
- 2006-07-14 CN CNU2006200616527U patent/CN2920808Y/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101823408A (en) * | 2010-04-26 | 2010-09-08 | 盛永瑞 | Bicycle |
CN111661232A (en) * | 2020-05-11 | 2020-09-15 | 沈焕春 | Bicycle with novel power device |
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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 |