CN106687365B - Speed changing method for automatic speed changing of bicycle - Google Patents
Speed changing method for automatic speed changing of bicycle Download PDFInfo
- Publication number
- CN106687365B CN106687365B CN201680001655.8A CN201680001655A CN106687365B CN 106687365 B CN106687365 B CN 106687365B CN 201680001655 A CN201680001655 A CN 201680001655A CN 106687365 B CN106687365 B CN 106687365B
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- CN
- China
- Prior art keywords
- clock
- gear shifting
- speed changing
- time
- bicycle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
Abstract
The invention discloses a speed changing method for automatic speed changing of a bicycle, which comprises the following steps: when the torque borne by the crank connected with the pedals is zero or approximately zero, the gear shifting is completed. The invention discloses a speed change method of automatic speed change of a bicycle, which finishes the speed change by controlling the time of finishing the speed change when the torque borne by a crank connected with pedals is zero or approximately zero, under the state, a chain is not stressed or the stress is approximately zero, the risk of the chain being pulled off is eliminated, obvious pedal vacancy can not occur, the pedals can not slide out of the pedals, the riding feeling is smooth, and good riding experience is brought to riders.
Description
Technical Field
The invention relates to a speed-changing bicycle, in particular to a speed-changing method for automatically changing speed of a bicycle.
Background
the automatic speed changing bicycle on the market at present has a shortcoming in completing automatic speed changing in the riding process, namely, in the shifting process, a chain cannot be stressed, otherwise, the chain may be broken, the pedal is obviously empty, the foot can slide out of the pedal, the riding feeling is not smooth, and potential safety hazards may be brought to riders.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a speed changing method for automatic speed changing of a bicycle, aiming at the defects of the prior art.
in order to solve the technical problems, the invention adopts the following technical scheme.
A speed changing method for automatic speed changing of a bicycle comprises the following steps: when the torque borne by the crank connected with the pedals is zero or approximately zero, the gear shifting is completed.
Preferably, when the torque applied to the crank connected with the pedal is zero or approximately zero, the two crank positions are respectively positioned in the interval from 11 o 'clock to 1 o' clock and from 5 o 'clock to 7 o' clock of the middle shaft.
Preferably, the two crank positions are located at 12 o 'clock and 6 o' clock of the middle shaft respectively to complete the gear shifting.
Preferably, the time a required for gear shifting is measured and obtained through an instrument, a sensor is arranged in the 6 o' clock direction of the middle shaft for calculating the step frequency, the time b required by each turn of the chain wheel is calculated according to the step frequency, and the time a required by gear shifting and obtained through measurement is subtracted from the time b required by each turn of the chain wheel to obtain the delay time c; and during gear shifting, the gear shifting command is executed by the delay time c when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft, and the gear shifting is completed when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft again.
The invention discloses a speed change method of automatic speed change of a bicycle, which finishes the speed change by controlling the time of finishing the speed change when the torque borne by a crank connected with pedals is zero or approximately zero, under the state, a chain is not stressed or the stress is approximately zero, the risk of the chain being pulled off is eliminated, obvious pedal vacancy can not occur, the pedals can not slide out of the pedals, the riding feeling is smooth, and good riding experience is brought to riders.
Drawings
FIG. 1 is a schematic diagram of a crank position range in the automatic transmission method for a bicycle according to the present invention;
FIG. 2 is a schematic flow chart of the automatic speed changing method for a bicycle according to the present invention.
Detailed Description
The invention is described in more detail below with reference to the figures and examples.
The invention discloses a speed changing method of bicycle automatic speed changing, as shown in figure 1, in the riding process, the pedal drives the chain wheel to do circular motion through the crank, only one foot is exerting force at any position in the riding process, the connecting two cranks is the middle shaft, the position interval with the maximum pedaling force appears in the range of the crank from 1 o 'clock direction to 5 o' clock direction of the middle shaft, and also is the appearance range interval with the maximum crank torque, the torque of the crank from 5 o 'clock direction to 7 o' clock direction of the middle shaft is zero or approximate to zero, thus when the torque of the crank connected with the pedal is zero or approximate to zero, the gear changing is completed, namely the two crank positions are respectively located in the range of 11 o 'clock to 1 o' clock direction of the middle shaft and 5 o 'clock to 7 o' clock direction of the middle shaft, the gear changing is completed under the state, the chain is not atress or the atress is near zero, has eliminated the risk that the chain was pulled apart to obvious stepping on empty can not appear, the foot can not the roll-off pedal yet, and it is smooth and easy to ride the sensation, brings the experience of riding well for riding passerby.
On the basis of the scheme, preferably, the two crank positions are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft to finish shifting, the torque borne by the crank at the position point is zero, the chain is not stressed, the risk that the chain is broken by pulling is eliminated, obvious stepping is avoided, the foot cannot slide out and step, the riding feeling is smooth, and good riding experience is brought to a rider.
Furthermore, the time a required by gear shifting is obtained by instrument measurement, a sensor is arranged in the 6 o' clock direction of the middle shaft for calculating the step frequency, the time b required by each circle of the chain wheel is calculated according to the step frequency, and the time a required by gear shifting obtained by measurement is subtracted from the time b required by each circle of the chain wheel to obtain the delay time c; when the gear is shifted, the two cranks are respectively positioned in the directions of 12 o 'clock and 6 o' clock of the middle shaft, the delay time c is started to execute the gear shifting command, and the gear shifting is completed when the positions of the two cranks are respectively positioned in the directions of 12 o 'clock and 6 o' clock of the middle shaft again; such as:
the stepping frequency is 100 revolutions per minute, namely 1 minute of crankset turns 100 circles, and the time b of each circle is 60S/100-0.6S;
The stepping frequency is 90 revolutions per minute, namely 1 minute of crankset turns 90 circles, and the time b of each circle is 60S/90-0.66S
The stepping frequency is 80 revolutions per minute, namely 1 minute of crankset is 80 revolutions, and the time b of each revolution is 60S/80-0.75S
The stepping frequency is 70 revolutions per minute, namely 1 minute of crankset revolutions, and the time b of each revolution is 60S/70-0.85S
The stepping frequency is 60 revolutions per minute, namely 1 minute of crankset revolutions is 60 circles, and the time b of each circle is 60S/60-1S
The stepping frequency is 50 revolutions per minute, namely 1 minute of crankset is 50 revolutions, and the time b of each revolution is 60S/50-1.2S
The time a required for obtaining gear shifting through instrument measurement is 0.5 second, and for different step frequencies, the delay time c is respectively as follows:
When the frequency is stepped on 100: 0.6S 0.6S-0.5S 0.1S 60S/100
The delay time c is 0.1S.
When the frequency is stepped on by 90: 60S/90-0.66S 0.66S-0.5S-0.16S
The delay time c is 0.16S.
When the frequency is stepped on by 80: 60S/80-0.75S-0.5S-0.25S
the delay time c is 0.25S.
When the frequency is stepped on by 70: 60S/70-0.85S-0.5S-0.35S
The delay time c is 0.35S.
When the frequency is stepped on 60: 60S/60 ═ 1S 1S-0.5S ═ 0.5S
The delay time c is 0.5S.
When the frequency is stepped on 50: 60S/50-1.2S 1.2S-0.5S-0.7S
The delay time c is 0.7S, corresponding delay time c is correspondingly executed aiming at different pedaling frequencies, a gear shifting command is executed by the delay time c when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft, gear shifting is completed when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft again, namely the gear shifting is completed at the position where the torque of the cranks is zero.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (1)
1. A speed changing method for automatic speed changing of a bicycle is characterized by comprising the following steps:
Two crank positions connected with the pedal are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft to finish gear shifting, and the method specifically comprises the following steps: the time a required by gear shifting is obtained through instrument measurement, a sensor is arranged in the 6 o' clock direction of the middle shaft for calculating the step frequency, the time b required by each circle of the chain wheel is calculated according to the step frequency, and the time a required by the gear shifting obtained through measurement is subtracted from the time b required by each circle of the chain wheel to obtain the delay time c; and during gear shifting, the gear shifting command is executed by the delay time c when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft, and the gear shifting is completed when the two cranks are respectively positioned in the 12 o 'clock and 6 o' clock directions of the middle shaft again.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/109338 WO2018103107A1 (en) | 2016-12-10 | 2016-12-10 | Speed change method for automatically changing bicycle speed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106687365A CN106687365A (en) | 2017-05-17 |
| CN106687365B true CN106687365B (en) | 2019-12-13 |
Family
ID=58850551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680001655.8A Active CN106687365B (en) | 2016-12-10 | 2016-12-10 | Speed changing method for automatic speed changing of bicycle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106687365B (en) |
| WO (1) | WO2018103107A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI728558B (en) * | 2019-11-19 | 2021-05-21 | 樹德科技大學 | Bicycle shifting system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000108982A (en) * | 1998-09-30 | 2000-04-18 | Akebono Brake Ind Co Ltd | Automatic transmission for bicycle |
| CN101041371A (en) * | 2006-03-24 | 2007-09-26 | 岛野(新加坡)私人有限公司 | Speed-change auxiliary device for bicycle |
| CN102951254A (en) * | 2011-08-29 | 2013-03-06 | 久鼎金属实业股份有限公司 | Automatic variable speed bicycle with best gear shifting time |
| CN204821977U (en) * | 2015-07-14 | 2015-12-02 | 赵志伟 | Automatic speed variator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501575A (en) * | 1983-08-22 | 1985-02-26 | Lapeyre Fernand S | Multi-speed transmission for BMX bicycles and the like |
| CN105564584B (en) * | 2016-01-27 | 2018-07-27 | 深圳市七尚科技有限公司 | Automatic transimission and its bicycle, the method for changing speed of multi-speed bicycle |
-
2016
- 2016-12-10 WO PCT/CN2016/109338 patent/WO2018103107A1/en active Application Filing
- 2016-12-10 CN CN201680001655.8A patent/CN106687365B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000108982A (en) * | 1998-09-30 | 2000-04-18 | Akebono Brake Ind Co Ltd | Automatic transmission for bicycle |
| CN101041371A (en) * | 2006-03-24 | 2007-09-26 | 岛野(新加坡)私人有限公司 | Speed-change auxiliary device for bicycle |
| CN102951254A (en) * | 2011-08-29 | 2013-03-06 | 久鼎金属实业股份有限公司 | Automatic variable speed bicycle with best gear shifting time |
| CN204821977U (en) * | 2015-07-14 | 2015-12-02 | 赵志伟 | Automatic speed variator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106687365A (en) | 2017-05-17 |
| WO2018103107A1 (en) | 2018-06-14 |
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