KR20140046800A - Pedal housing and sub-transmission device of chainless bike using sprocket bended 90° - Google Patents
Pedal housing and sub-transmission device of chainless bike using sprocket bended 90° Download PDFInfo
- Publication number
- KR20140046800A KR20140046800A KR1020120112907A KR20120112907A KR20140046800A KR 20140046800 A KR20140046800 A KR 20140046800A KR 1020120112907 A KR1020120112907 A KR 1020120112907A KR 20120112907 A KR20120112907 A KR 20120112907A KR 20140046800 A KR20140046800 A KR 20140046800A
- Authority
- KR
- South Korea
- Prior art keywords
- sprocket
- gear
- sprockets
- housing
- main shaft
- Prior art date
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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
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
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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
- B62M17/00—Transmissions characterised by use of rotary shaft, e.g. cardan shaft
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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
- B62M3/00—Construction of cranks operated by hand or foot
- B62M3/08—Pedals
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
The present invention relates to a bicycle shifting device, and more particularly, by using a sprocket bent at 90 degrees to be selectively restrained and released by a shifting structure actuated by a shifting lever, so that the shifting operation is accurate, smooth and noiseless. It relates to the pedal housing and lower transmission of a chainless bicycle using a sprocket bent at 90 degrees, which can be quieter, and its volume is small and its operation is easy, so that the convenience of weight reduction and handling of the bicycle can be pursued.
Bicycles have been widely used in transportation for many years. Recently, bicycles have been used for sports and fitness purposes. In addition, various types of bicycles have been developed, such as racing bikes, unpaved cross-country rides, and travel bicycles.
Many bikes are equipped with multi-speed transmissions to improve their handling performance according to different types of driving conditions. The existing bicycle transmission takes the form of a manually controlled transmission through a cable connected to the shift lever. Moving the shifting gear causes the tension of the cable to change, which causes the shifting device and the driving chain to move from one gear to the other. As a result, different pedal forces and pedal rotational speeds can be achieved depending on different gearing ratios.
As such a bicycle transmission, a "shift method of a bicycle transmission device" of Patent Publication No. 10-2008-77711 is disclosed in Japanese Patent Application Laid- A sprocket; A main body chain for connecting the sprocket for driving the main body and the sprocket for main body to transmit the rotational force of the rear wheel to the main body; A main body in which the magnitude of the pulling force for pulling the wire by the running speed of the bicycle is increased or decreased; A wire organically connecting the traction force of the main body and the restoring force of the rear derailleur; A rear derailleur driven by a pulling force of the main body pulling the wire; A chain that moves within the cassette sprocket by the rear derailleur and changes the gear ratio; It is composed of a cassette sprocket with a combination of multiple sprockets with different dimensional ratios. It makes it easy to ascend or descend the slope, hill or mountainous terrain of the road by easy shifting method. It is possible to improve the efficiency of the transmission and the convenience of use because it can be adjusted, and it can be installed without changing the structure of the bicycle and has a mechanical structure capable of mass production. .
However, the "shift method of the transmission for bicycle" of the above-mentioned Patent Publication No. 10-2008-77711 has a defect that the gear can not be changed without rotating the gear. For this reason, it is possible to perform an appropriate conversion of the gear only when the bicycle is in operation, and the passenger can not change the gear when the bicycle is at rest. This is particularly problematic when the transmission is shifted to a high-speed gear for high-speed running before the bicycle is stopped. Then, when the cyclist stops the bicycle, the cyclist must apply a large pedal force to the pedal to move the bicycle again. Since the shifting requires the rotation of the transmission gear by the forward driving of the bicycle, the occupant can not make the shift to the lower side in order to reduce the pedal force required to restart the bicycle.
Another drawback of such a conventional transmission is that it is worn prematurely and needs frequent maintenance since the gear is exposed to members and dust on the road.
Therefore, there is a demand for a multi-speed transmission for a bicycle which can be shifted when the bicycle is in a stopped state.
In addition, development of a transmission that does not require frequent maintenance without risk of premature wear and tear is desired.
The present invention has been invented to solve various defects and problems caused by the conventional gear shifting apparatus in view of the above situation, and an object thereof is to rotate a gear connected to a wheel shaft by shifting by using a sprocket bent at 90 degrees. The present invention provides a pedal housing and a lower transmission of an autonomous bicycle using a sprocket that is bent at 90 degrees, which can be easily shifted to prevent a safety accident caused by a shift.
Another object of the present invention is to shift the gearbox embedded in the pedal shaft so that the gear members of the gearbox are not exposed to the outside such as dust on the road, so that early wear or failure of the gear members does not occur, thus making it easy to maintain and use for a long time. The present invention provides a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at a long life of 90 degrees.
Still another object of the present invention is to shift the transmission gears built into the pedal shaft to achieve the accuracy and smoothness and quietness of the shifting operation. The present invention provides a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at 90 degrees.
Pedal housing and lower transmission of the chainless bicycle using the
The present invention can be easily shifted without rotating the gear connected to the wheel shaft by shifting by using a sprocket bent at 90 degrees to prevent safety accidents caused by shifting, and shifting the shifting device built into the pedal shaft The gear members of the gearbox are not exposed to the outside such as dust on the road, so there is no premature wear or failure of the gear members, so the maintenance is easy and the service life is long, and the gearbox is built into the pedal shaft. It can provide accuracy and smoothness and quietness of silence, and it has a special advantage to pursue convenience in reducing weight and handling of the bicycle because of its small volume and easy operation.
1 is a cross-sectional view of a pedal housing and a lower transmission of a chainless bicycle using a sprocket bent at 90 degrees according to the present invention.
Hereinafter, the pedal housing and the lower transmission of the chainless bicycle using the sprocket bent at 90 degrees according to the present invention and the preferred embodiment will be described in detail.
1 is a cross-sectional view of the pedal housing and the lower transmission of the chainless bicycle using the
Next will be described in detail the operation of the pedal mode of the chainless bicycle using the sprocket bent by the present invention configured as described above and the shift mode of the lower transmission device in detail.
1. Low speed mode
When the low speed mode is selected by the operation of the
2. Medium speed mode
When the medium speed mode is selected by the operation of the
3.High speed mode
When the high speed mode is selected by the operation of the
While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited thereto and that various changes and modifications may be made therein without departing from the scope of the invention.
10: spline 11: housing
12: spindle 13: spring
14: rear wheel shaft 20: rod pin insertion groove
30, 30 '30 ": Sprocket 40, 40', 40": Clutch
50: gear 60: clutch
70, 70 ', 70 ": Bearing 80: Shift lever
90, 90 ', 90 ": lower derailleur
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120112907A KR20140046800A (en) | 2012-10-11 | 2012-10-11 | Pedal housing and sub-transmission device of chainless bike using sprocket bended 90° |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120112907A KR20140046800A (en) | 2012-10-11 | 2012-10-11 | Pedal housing and sub-transmission device of chainless bike using sprocket bended 90° |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20140046800A true KR20140046800A (en) | 2014-04-21 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020120112907A KR20140046800A (en) | 2012-10-11 | 2012-10-11 | Pedal housing and sub-transmission device of chainless bike using sprocket bended 90° |
Country Status (1)
Country | Link |
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KR (1) | KR20140046800A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107792293A (en) * | 2017-09-19 | 2018-03-13 | 安徽信息工程学院 | The preposition gear-shift mechanism of bicycle |
-
2012
- 2012-10-11 KR KR1020120112907A patent/KR20140046800A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107792293A (en) * | 2017-09-19 | 2018-03-13 | 安徽信息工程学院 | The preposition gear-shift mechanism of bicycle |
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WITN | Withdrawal due to no request for examination |