CN2277365Y - Labour-saving speed increaser for bicycle - Google Patents
Labour-saving speed increaser for bicycle Download PDFInfo
- Publication number
- CN2277365Y CN2277365Y CN 96224648 CN96224648U CN2277365Y CN 2277365 Y CN2277365 Y CN 2277365Y CN 96224648 CN96224648 CN 96224648 CN 96224648 U CN96224648 U CN 96224648U CN 2277365 Y CN2277365 Y CN 2277365Y
- Authority
- CN
- China
- Prior art keywords
- crank
- right sides
- pedal
- swing arm
- 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 relates to a labor-saving speed increaser which comprises a middle axle 1, a crank 2 and a pedal 4 of a bicycle. The utility model is characterized in that a rotary rod 3 which can be rotatablely connected with the crank is arranged between the crank and the pedal; the rotary rod 3 is connected with the crank 2 through a rotary rod axle 5 arranged in a rotary rod axle hole of the end part of the crank 2; the rotary rod 3 can rotate around the rotary rod axle. In the utility model, a stroke section which produces driving force has larger turning radius correspondingly to the middle axle; the stroke section which doesn't produce the driving force has a smaller turning radius; the position of the pedal is lowered; total stroke is greatly shortened; thus the labor is saved and the speed is increased at the time of riding.
Description
The utility model relates to technical field of bicycles, particularly relates to bicycle driving mechanism.Existing bicycle driving mechanism is that pedal drives, axis 1, left crank 2, right crank 2 ', the left foot that comprises bicycle pedals 4, right pedal 4 ', wherein an end of left and right sides crank respectively is fastened on the two ends, the left and right sides of axis, and left and right sides pedal is installed on the other end of left and right sides crank.In the time of by bike, cyclist's pedal is made circular movement, drives axis and rotates, and the sprocket rotation that axis drives and axis is connected also by the chain drive wheel rolling, moves ahead bicycle.Pin only produces propulsive effort at preceding half-turn when stepping on pedal driving bicycle, and then half-turn is the backlash journey that can not produce propulsive effort.Because pedal radius of turn (crank length) is constant, the total kilometrage of backlash journey and each circle is all longer, and efficient is lower, effort by bike, particularly about the shank, the amplitude that seesaws is bigger, tired easily.
The purpose of this utility model is that to bicycle provides a kind of radius of turn variable can reduce the pedal position is the bicycle labor saving speed increaser of laborsaving speedup again.
The utility model is such design-calculated: it is made up of axis 1, left and right sides crank 2 and 2 ', left and right sides swing arm 3 and 3 ', left and right sides pedal 4 and 4 ', wherein left and right sides crank 2 and an end of 2 ' are fastened on the two ends, the left and right sides of axis 1 respectively, the other end is respectively equipped with the swing arm axis hole, be contained in this swing arm axis hole swing arm axle 5 and 5 ' with crank 2 and 2 ' and swing arm 3 and 3 ' be rotatably connected, the swing arm 3 and 3 ' the other end are installed pedal 4 and 4 ' respectively, and crank 2 and 2 ' length are greater than the length of swing arm 3 and 3 '.
The utility model has the advantages that laborsaving and speedup, its labour-saving reason is: in the time of by bike, pedal 4 is done circulatory motion around axis, and the radius of turn of relative axis is big when bicycle being produced the trip segment of propulsive effort; And radius of turn is little when not producing the trip segment of propulsive effort, and has reduced the position of pedal, has dwindled the amplitude of leg exercise, increased the knee joint angle, be beneficial to the extension of shank and firmly, so laborsaving, therefore can give full play to the expansion force of shank and scrunch power, reduce the fatigue of shank.The reason of the utility model energy speedup also is dwindling owing to radius of turn, foot-operated total stroke is shortened greatly, and crank 2 and sprocket wheel convey to the not minimizing of speed ratio of flywheel, the existing bicycle of the time ratio in a moving week of crank revolution shortens, therefore increase the number of turns that scrunches relatively, thereby reached the purpose of speedup.
Below in conjunction with the embodiment accompanying drawing the utility model is described in detail.
Fig. 1 is the schematic perspective view of the utility model structure;
Fig. 2 is installation and the motion scheme drawing of the utility model on bicycle; Wherein: 1, axis 2, left crank 2 ', right crank 3, left-handed bar 3 ', dextrorotation bar 4, left foot are pedaled 4 ', right pedal 5, left-handed bar axle (hole) 5 ', dextrorotation bar axle (hole) 6, ordinary bicycle pedal path of motion 7, are adopted the utility model bicycle pedal path of motion.
Embodiment:
Present embodiment is made of left and right sides crank 2 and 2 ', left and right sides swing arm 3 and 3 ', left and right sides pedal 4 and 4 ', and left and right sides crank 2 and an end of 2 ' are fastened on the two ends, the left and right sides of bicycle middle shaft 1, and the other end is provided with the swing arm axis hole.Left and right sides swing arm axle 5 and 5 ' is installed in respectively in the swing arm axis hole of the left and right sides; Left and right sides swing arm 3 and an end of 3 ' are installed in respectively on left and right sides swing arm axle 5 and 5 ', and itself and left and right sides crank 2 and 2 ' are rotatably connected; The left and right sides swing arm 3 and 3 ' the other end are installed left and right sides pedal 4 and 4 ' respectively.Swing arm 3 and 3 ' length L 1 are 1 with the ratio of the length L 2 of crank 2 and 2 ': 2-5, and for example swing arm 3 and 3 ' length are 40mm, crank 2 and 2 ' length are 140mm.Ratio between two is 1: 3.5.
Claims (2)
1, a kind of bicycle labor saving speed increaser, comprise axis (1), left and right sides crank (2) and (2 '), left and right sides pedal (4) and (4 '), wherein an end of left and right sides crank (2) (2 ') is fastened on the two ends, the left and right sides of axis (1) respectively, the other end that it is characterized in that left and right sides crank (2) and (2 ') is provided with the swing arm axis hole, left and right sides swing arm axle (5) and (5 ') are installed respectively in this axis hole, one end of left and right sides swing arm (3) and (3 ') is contained in respectively on left and right sides swing arm axle (5) and (5 '), and left and right sides pedal (4) and (4 ') are installed respectively on the other end; The length of crank (2) and (2 ') is greater than the length of swing arm (3) and (3 ').
2, laborsaving speed increaser according to claim 1, the length L 1 that it is characterized in that left and right sides swing arm (3) and (3 ') is 1 with the ratio of the length L 2 of left and right sides crank (2) and (2 '): 2-5, i.e. L1: L2=1: 2-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96224648 CN2277365Y (en) | 1996-09-20 | 1996-09-20 | Labour-saving speed increaser for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96224648 CN2277365Y (en) | 1996-09-20 | 1996-09-20 | Labour-saving speed increaser for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2277365Y true CN2277365Y (en) | 1998-04-01 |
Family
ID=33903561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96224648 Expired - Fee Related CN2277365Y (en) | 1996-09-20 | 1996-09-20 | Labour-saving speed increaser for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2277365Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009388A1 (en) * | 1998-08-13 | 2000-02-24 | Shen Jiang | A high-speed bicycle |
| GB2500433A (en) * | 2012-03-23 | 2013-09-25 | Shang Wan Chen | Two part crank |
-
1996
- 1996-09-20 CN CN 96224648 patent/CN2277365Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000009388A1 (en) * | 1998-08-13 | 2000-02-24 | Shen Jiang | A high-speed bicycle |
| GB2500433A (en) * | 2012-03-23 | 2013-09-25 | Shang Wan Chen | Two part crank |
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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 |