CN2666804Y - Active deformed round gear wheel for bicycle - Google Patents
Active deformed round gear wheel for bicycle Download PDFInfo
- Publication number
- CN2666804Y CN2666804Y CN 200420001783 CN200420001783U CN2666804Y CN 2666804 Y CN2666804 Y CN 2666804Y CN 200420001783 CN200420001783 CN 200420001783 CN 200420001783 U CN200420001783 U CN 200420001783U CN 2666804 Y CN2666804 Y CN 2666804Y
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- China
- Prior art keywords
- gear wheel
- bicycle
- crank
- active
- initiatively
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- Expired - Fee Related
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Abstract
The utility model relates to an active deformed round gear wheel for bicycle. In riding the bicycle, when two cranks are vertical up and down, by using the characteristic of the straight-line segment the active special-shaped roller cone, the crank rotates in sliding angle, and slides over the vertical point quickly; after rotating a certain angle, the force applied on the pedal is increased gradually. When two cranks are in parallel state, the force on the crank is largest and the work of the active cone is large, thereby achieving the object of saving labor.
Description
Affiliated technical field:
The utility model relates to and is used for a kind of bicycle active abnormity circle gear wheel that bicycle drives, and it has changed the stress point of crank, allows the people ride and scrunches the also fast bicycle that initiatively special-shaped circle gear wheel is housed lighter, that run.
Background technology:
Bicycle is ride instead of walk the in daily life vehicles of common of body-building of people.Over more than 100 year, people want to scrunch by bike the time lighter, and race also fast carried out research and changed on the active gear wheel of bicycle, there is no substantial progress, adopts circular initiatively gear wheel all the time.When the rider rides with present general-duty bicycle, foot-operated crank moves in a circle, when crank turns to the perpendicular angle of sole (being commonly called as the dead point), scrunch crank requires great effort very much, always wish that crank slips over vertical point (being commonly called as the dead point) fast, allow foot-operated power concentrate on the parallel point that is used in crank (crank acting point).People want to utilize the oval and oblate characteristics that major and minor axis is arranged, and make initiatively gear wheel of bicycle, and the gear wheel minor axis can solve crank and slip over vertical point (being commonly called as the dead point) fast, and the gear wheel major axis can allow foot-operated power concentrate and do work on the parallel point of crank.But the shortcoming of these two kinds of gear wheels is, when rotated, the gear wheel minor axis is long, and it is not obvious that crank slides angle, do not slide effect, the gear wheel minor axis is short, be beneficial to crank and slided vertical point (being commonly called as the dead point), but major axis is elongated, the gear wheel major axis is long, cause gear wheel moment to increase, crank is on parallel some the time, and the crank that causes pedal to step on the crank of ellipse or the oblate gear wheel circular gear wheel equal than the number of teeth is required great effort.In practice, it is found that the oblate qualification that has ellipticity, ellipse that ellipse's drawing method is arranged, the length of major and minor axis changes mutual restriction, and their perimeter line is camber line always, compares with circular gear wheel, do not have tangible labor-saving effect, adopt on bicycle, do not applied.
Summary of the invention:
In order to overcome the dead point that exists in the existing bicycle crank rotation, the utility model provides initiatively abnormity circle gear wheel of a kind of bicycle, be used for bicycle, its advantage is: initiatively special-shaped circle gear wheel promptly helps crank and slides, help the crank acting again, allow the people ride and be equipped with when initiatively the bicycle of abnormity circle gear wheel is compared with existing bicycle, can improve riding speed with same power, can be laborsaving under same riding speed.
The technical scheme that its technical matters that solves the utility model adopts is: draw two linear portions that equate symmetry up and down, draw two arcs that equate symmetry at the left and right sides of two linear portions end points respectively, the arc end points is connected with the end points of two linear portions, be the abnormity circle, the abnormity circle has the branch of major and minor axis to be non-circle shape, article two, the linear portion intermediate connection is a minor axis, and two arc intermediate connection are major axis, makes initiatively gear wheel of bicycle with the abnormity circle.The shape of justifying gear wheel because of the active abnormity is by two straight lines and two non-circles that camber line constituted, causing initiatively, the cireular frequency of abnormity circle gear wheel in rotation is not at the uniform velocity, initiatively in the rotation of abnormity circle gear wheel when driving bicycle, the minor axis end is that linear portion can make the chain path in the rotation shorten, cireular frequency accelerates, can make crank slide vertical point fast, be made as bicycle crank and slide the district, longitudinal end is that arc can make the chain path in the rotation increase, cireular frequency is slack-off, crank is fully done work, be made as bicycle crank acting district, the crank vertical direction of bicycle slides regional corresponding the installing and fixing of line of centers with abnormity circle gear wheel, the length of two linear portions, and the decision crank slides the size of angle.Be the tight wave phenomenon of a pine one of eliminating that abnormity circle gear wheel (non-circle) initiatively causes in rotation that chain produces, initiatively the number of teeth between gear wheel and the passive gear wheel is more or less the same in 2.The people is in the bicycle of riding, and two cranks utilize the initiatively characteristics of abnormity circle gear wheel linear portion when vertical up and down, and crank rotates to be and slides angle, slips over vertical point fast, after turning an angle, foot-operatedly firmly increases gradually; When two cranks are in parastate, the stressed maximum of crank, this moment, initiatively the gear wheel acting was big, thereby reached the labour-saving purpose.
The beneficial effects of the utility model are, bicycle adopts initiatively abnormity circle gear wheel, and its minor axis end sideline linearly helps crank and slides, and its longitudinal end sideline is camber line, helps the crank acting again, can make bicycle laborsaving when riding.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the principle contrast scheme drawing of oblate T1, oval T2, abnormity circle T3.
Fig. 2 is initiatively abnormity circle gear wheel shape figure of the utility model.
Fig. 3 is that initiatively abnormity circle gear wheel makes up scheme drawing with the installation of other parts in the bicycle running part.Among Fig. 31,2, crank, 3, abnormity circle gear wheel initiatively, 4, axis, 5, driving chain, 6, passive gear wheel.
The specific embodiment:
The comparative analysis embodiment of the principle of T1 shown in Figure 1, T2, T3 in contour line, its circumferential length equates, perimeter line radian difference, the circular arc line diameter that marks during major axis a rotation is also unequal, major axis a is short, the circular arc line diameter that marks is just little, the little moment of circular diameter is little, major axis a is long, the circular arc line diameter that marks is just big, and the big moment of circular diameter is big, the circular arc line diameter that the circular arc line diameter that the major axis a of T3 marks marks less than T1, T2, the minor axis b of T3 is shorter than the minor axis b of T1, T2, and minor axis b end rotates just fast.The major axis a of T1, T2, T3 and the length of minor axis b have nothing in common with each other, and T1, T2, the T3 stressed difference in each position of peripheral camber line in rotation is analyzed contrast and is better than other shape gear wheel with abnormity circle gear wheel as bicycle active gear wheel.
In embodiment illustrated in fig. 2, draw two linear portions that equate symmetry up and down, draw two arcs that equate symmetry at the left and right sides of two linear portions end points respectively, the arc end points is connected with the end points of two linear portions, be the abnormity circle, the abnormity circle has the branch of major and minor axis to be non-circle shape, and two linear portion intermediate connection are minor axis b, article two, the arc intermediate connection is major axis a, makes initiatively gear wheel of bicycle with the abnormity circle.The L line segment is the linear portion of abnormity circle gear wheel, the length of two linear portions, and the decision crank slides the size of angle.
In the embodiment shown in fig. 3, the initiatively special-shaped circle same crank of gear wheel (3) (1) of the utility model mount together, the crank vertical direction slides regional corresponding the installing and fixing of line of centers with abnormity circle gear wheel, be contained in an end of axis (4), crank (2) is contained in the other end of axis (4), initiatively abnormity circle gear wheel (3) connects passive gear wheel (6) with driving chain (5), initiatively the power of gear wheel (3) is transferred on the passive gear wheel (6) by active chain (5), and initiatively the number of teeth between abnormity circle its gear wheel number of teeth of gear wheel (3) and the passive gear wheel (6) is more or less the same in 2.
Claims (2)
1. a bicycle active abnormity is justified gear wheel, the number of teeth between active abnormity circle gear wheel and the passive gear wheel is more or less the same in 2, it is characterized in that: with the bicycle active gear wheel that the abnormity circle is made, the branch of major and minor axis is arranged, the minor axis end periphery is a straight line, and the longitudinal end periphery is a camber line.
2. active abnormity circle gear wheel according to claim 1, it is characterized in that: initiatively the number of teeth between abnormity circle gear wheel (3) and the passive gear wheel (6) is more or less the same in 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420001783 CN2666804Y (en) | 2004-01-06 | 2004-01-06 | Active deformed round gear wheel for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420001783 CN2666804Y (en) | 2004-01-06 | 2004-01-06 | Active deformed round gear wheel for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2666804Y true CN2666804Y (en) | 2004-12-29 |
Family
ID=34352435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420001783 Expired - Fee Related CN2666804Y (en) | 2004-01-06 | 2004-01-06 | Active deformed round gear wheel for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2666804Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125574B (en) * | 2006-08-16 | 2011-07-27 | 普利司通自行车有限公司 | Tension adjusting device and belt driving type bicycle |
-
2004
- 2004-01-06 CN CN 200420001783 patent/CN2666804Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125574B (en) * | 2006-08-16 | 2011-07-27 | 普利司通自行车有限公司 | Tension adjusting device and belt driving type bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041229 |