CN106494562B - Full-automatic three-level variable speed driving device - Google Patents
Full-automatic three-level variable speed driving device Download PDFInfo
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- CN106494562B CN106494562B CN201611143039.4A CN201611143039A CN106494562B CN 106494562 B CN106494562 B CN 106494562B CN 201611143039 A CN201611143039 A CN 201611143039A CN 106494562 B CN106494562 B CN 106494562B
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- pawl
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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
- B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
- B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
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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 full-automatic three-stage variable speed driving device, which comprises: center pin, wheel hub and speed change mechanism, speed change mechanism includes: a planetary transmission, an input shift mechanism, and an output shift mechanism, the planetary transmission comprising: ring gear, centre wheel, planet wheel and planet carrier, the planet carrier forms the first chamber of acceping with the one end of ring gear, the ring gear is equipped with and is located the first interior ratchet of first intracavity of acceping, the planet carrier is equipped with and is located the first outer ratchet of first intracavity of acceping, the planet carrier forms the second with the other end of ring gear and accepts the chamber, the ring gear is equipped with and is located the second and accepts the interior ratchet of second of intracavity, the planet carrier is equipped with and is located the second and accepts the outer ratchet of second of intracavity, input gearshift includes: input and trade and keep off a frame and input and trade and keep off, output gearshift includes: the invention discloses an output shift rack and an output shift piece, which realize full-automatic three-level speed change by arranging two sets of gear shifting mechanisms.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bicycles, in particular to a full-automatic three-level variable speed driving device.
[ background of the invention ]
The bicycle speed changer is divided into an inner speed changer and an outer speed changer, the outer speed changer adopts an open chain mechanism as a transmission system, a chain is changed to different flywheels by shifting a gear shifter arranged in front of a bicycle to realize different chain transmission ratios, the outer speed changer is exposed outside, so the outer speed changer is easy to rust and easy to be interfered by external force, regular maintenance is often needed, the inner speed changer mainly adopts a planetary gear mechanism as a transmission main body, and is sealed inside a hub and protected by multiple layers of special sealing materials, so rainwater, dust, oil dirt and the like cannot enter, the regular maintenance is not needed, and the advantage of no maintenance is realized. The manual gear shifting is generally needed in the gear shifting of the transmission in the prior art, and the automatic gear shifting cannot be realized.
Therefore, it is necessary to provide a fully automatic three-stage transmission driving device which solves the above technical problems.
[ summary of the invention ]
In order to solve the above problems, the present invention provides a fully automatic three-stage transmission driving device with compact structure and reliable gear shifting.
In order to achieve the purpose, the invention adopts the technical scheme that: a fully automatic three-stage variable speed drive comprising: center pin, wheel hub and install the speed change mechanism between center pin and wheel hub, speed change mechanism includes: a planetary transmission, an input shift mechanism, and an output shift mechanism, the planetary transmission comprising: ring gear, centre wheel, planet wheel and planet carrier, centre wheel and center pin fixed connection or integrated into one piece, the planet carrier forms the first chamber of acceping with the one end of ring gear, the ring gear is equipped with the first inner wall that is located the first intracavity of acceping, the first inner wall department of ring gear is equipped with first interior ratchet, the planet carrier is equipped with the first outer wall that is located the first intracavity of acceping, the first outer wall department of planet carrier is equipped with first outer ratchet, the planet carrier forms the second with the other end of ring gear and accepts the chamber, the ring gear is equipped with the second inner wall that is located the second and accepts the intracavity, the second inner wall department of ring gear is equipped with the interior ratchet of second, the planet carrier is equipped with the second outer wall that is located the second and accepts the intracavity, the second outer wall department of planet carrier is equipped with the second outer ratchet, input gearshift includes: the input shifting piece frame and the plurality of input shifting pieces arranged on the input shifting piece frame are characterized in that the input shifting piece comprises a first installation part and a first balancing weight arranged on one side face of one end of the first installation part, the other end of the first installation part is provided with a first double-faced pawl, the first installation part is accommodated in a second accommodating cavity, the first installation part is provided with a first positioning hole at a position between the first balancing weight and the first double-faced pawl, the input shifting piece is fixed with the input shifting piece frame through a first fixing piece arranged in the first positioning hole, an inner-face pawl in the first double-faced pawl is matched with a second outer ratchet wheel, an outer-face pawl in the first double-faced pawl is matched with a second inner ratchet wheel, and the output shifting mechanism comprises: the output shifting and blocking device comprises a second mounting part and a second balancing weight arranged on one side surface of one end of the second mounting part, the second mounting part is accommodated in the first accommodating cavity, a second double-sided pawl and a second positioning hole are arranged on the second mounting part, the second double-sided pawl and the second balancing weight are arranged at the same end of the second mounting part, the second positioning hole is arranged at the other end of the second mounting part, the output shifting and blocking device is fixed with the output shifting and blocking device frame through a second fixing part arranged in the second positioning hole, an inner-sided pawl of the second double-sided pawl is matched with the first outer ratchet wheel, and an outer-sided pawl of the second double-sided pawl is matched with the first inner ratchet wheel.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the pawl tooth forms of the first double-sided pawl and the second double-sided pawl are trapezoidal tooth forms which cannot exceed the following tooth forms.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the ratchet wheel teeth of the first inner ratchet wheel, the first outer ratchet wheel, the second inner ratchet wheel and the second outer ratchet wheel are all trapezoidal tooth shapes which cannot exceed the following.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the input shift pieces are connected through balance pull rods.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the output shifting pieces are connected through a balance pull rod.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the outer side of the input shift piece frame is provided with a magnetic block fixing piece, the magnetic block fixing piece is fixedly connected with the input shift piece frame through a third fixing piece, and the magnetic block fixing piece is provided with a magnetic block matched with the first balancing weight.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: one end of the input shifting and blocking piece frame is provided with a first parallel piece, a first ball is arranged between the input shifting and blocking piece frame and the first parallel piece, and a second ball is arranged between the input shifting and blocking piece frame and the hub.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: one end of the output shifting block frame is provided with a second combining piece, and a third ball is arranged between the output shifting block frame and the second combining piece.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the input shift element frame is provided with a first elastic part for controlling the initial position of the input shift element, and the output shift element frame is provided with a second elastic part for controlling the initial position of the output shift element.
Preferably, a fully automatic three-stage speed change driving device in the present invention is further configured to: the first elastic part and the second elastic part are torsion springs or spring pieces
Compared with the prior art, the invention has the following beneficial effects: the full-automatic three-stage variable speed driving device has the advantages of compact structure, convenience in installation, high transmission efficiency and firmness in gear shifting, and the full-automatic three-stage variable speed is realized by arranging two sets of gear shifting mechanisms.
[ description of the drawings ]
Fig. 1 is a front view schematically showing the structure of the fully automatic three-stage transmission driving apparatus according to the present invention.
FIG. 2 is an exploded view of the fully automatic three-stage transmission of the present invention.
Fig. 3 is a schematic sectional view taken along line a-a of fig. 1.
In the figure: 1. center shaft, 2, hub, 3, gear shift mechanism, 4, planetary transmission, 40, ring gear, 400, first inner wall, 401, first inner ratchet, 402, second inner wall, 403, second inner ratchet, 41, center wheel, 42, planet wheel, 43, planet carrier, 430, first outer wall, 431, first outer ratchet, 432, second outer wall, 433, second outer ratchet, 44, first receiving cavity, 45, second receiving cavity, 5, input shift mechanism, 50, input shift member carrier, 51, input shift member, 510, first mounting portion, 511, first weight, 512, first double-sided pawl, 5120, inner-sided pawl, 5121, outer-sided pawl, 513, first positioning hole, 6, output shift mechanism, 60, output shift member carrier, 61, output shift member, 610, second mounting portion, 611, second weight, 612, second double-sided pawl, 6120, inner-sided pawl, 6121, 6, output shift member, 60, output shift member carrier, 61, output shift member carrier, 610, second mounting portion, second weight, 612, second double-sided pawl, second inner-sided pawl, inner-ratchet, inner-side pawl, second-side pawl, second-side, and second-side, second, an outer pawl 613, a second positioning hole 7, a first clamping member 8, a magnetic block fixing member 80, a magnetic block 9 and a second clamping member.
[ detailed description ] embodiments
A fully automatic three-stage transmission driving apparatus according to the present invention will be described in further detail with reference to specific embodiments.
Referring to fig. 1 to 3, a fully automatic three-stage transmission driving apparatus includes: a central shaft 1, a hub 2 and a speed change mechanism 3 mounted between the central shaft 1 and the hub 2.
The speed change mechanism 3 includes: a planetary transmission 4, an input shift mechanism 5, and an output shift mechanism 6, the planetary transmission 4 including: a gear ring 40, a central wheel 41, a planet wheel 42 and a planet carrier 43, wherein the central wheel 41 is fixedly connected with the central shaft 1 or integrally formed, the planet carrier 43 and one end of the ring gear 40 form a first receiving cavity 44, the ring gear 40 is provided with a first inner wall 400 positioned in the first receiving cavity 44, a first inner ratchet wheel 401 is arranged on the first inner wall 400 of the gear ring 40, the planet carrier 43 is provided with a first outer wall 430 positioned in the first accommodating cavity 44, a first outer ratchet wheel 431 is arranged on the first outer wall 430 of the planet carrier 43, a second accommodating cavity 45 is formed by the planet carrier 43 and the other end of the gear ring 40, the gear ring 40 is provided with a second inner wall 402 positioned in the second accommodating cavity 45, the second inner wall 402 of the gear ring 40 is provided with a second inner ratchet wheel 403, the planet carrier 43 is provided with a second outer wall 432 positioned in the second accommodating cavity 45, and a second outer ratchet wheel 433 is arranged on the second outer wall 432 of the planet carrier 43.
The input shift mechanism 5 includes: the device comprises an input shift block frame 50 and a plurality of input shift blocks 51 arranged on the input shift block frame 50, wherein the input shift blocks 51 are connected through a balance pull rod. An input flywheel is arranged on the input shift block frame 50 to provide power input, a first holding member 7 is arranged at one end of the input shift block frame 50, and a first ball (not shown) is arranged between the input shift block frame 50 and the first holding member 7. A second ball (not shown) is disposed between the input shift frame 50 and the hub 2. The magnetic block fixing piece 8 is arranged on the outer side of the input shutter changing frame 50, the magnetic block fixing piece 8 is fixedly connected with the input shutter changing frame 50 through a third fixing piece, and a magnetic block 80 matched with the first balancing weight is arranged on the end face of the magnetic block fixing piece 8. By providing the magnetic block 80, the requirement for input speed can be reduced after shifting. The input changing piece 51 comprises a first mounting portion 510 and a first balancing weight 511 arranged on one side face of one end of the first mounting portion 510, a first double-faced pawl 512 is arranged at the other end of the first mounting portion 510, the first mounting portion 510 is accommodated in the second accommodating cavity 45, a first positioning hole 513 is arranged at a position between the first balancing weight 511 and the first double-faced pawl 512 of the first mounting portion 510, the input changing piece 51 is fixed with the input changing piece frame 50 through a first fixing piece arranged in the first positioning hole 513, an inner-face pawl 5120 of the first double-faced pawl 512 is matched with a second outer ratchet 433, and an outer-face pawl 5121 of the first double-faced pawl 512 is matched with a second inner ratchet 403. The input shift rack 50 is provided with a first elastic part for controlling the initial position of the input shift 51, and the first elastic part may be a torsion spring or a spring leaf.
The output shift mechanism 6 includes: the output shaft switching device comprises an output shaft switching rack 60 and a plurality of output shaft switching pieces 61 arranged on the output shaft switching rack 60, wherein a second elastic part used for controlling the initial position of the output shaft switching pieces 61 is arranged on the output shaft switching rack 60, and the second elastic part can be a torsion spring or a spring piece. The output shift pieces 61 are connected through a balance pull rod. One end of the output shift rack 60 is provided with a second clamping member 9, and a third ball (not shown) is arranged between the output shift rack 60 and the second clamping member 9. The hub 2 is fixedly connected with the output shaft changing and blocking frame 60, the output shaft changing and blocking piece 61 comprises a second mounting portion 610 and a second balancing weight 611 arranged on one side surface of one end of the second mounting portion 610, the second mounting portion 610 is accommodated in the first accommodating cavity 44, a second double-sided pawl 612 and a second positioning hole 613 are arranged on the second mounting portion 610, the second double-sided pawl 612 and the second balancing weight 611 are arranged at the same end of the second mounting portion 610, the second positioning hole 613 is arranged at the other end of the second mounting portion 610, the output shaft changing and blocking piece 61 is fixed with the output shaft changing and blocking frame 60 through a second fixing piece arranged in the second positioning hole 613, an inner-sided pawl 6120 of the second double-sided pawl 612 is matched with the first outer ratchet wheel 431, and an outer-sided pawl 6121 of the second double-sided pawl 612 is matched with the first inner ratchet wheel 401. In the present embodiment, the first double-sided pawl 512 and the second double-sided pawl 612 have trapezoidal tooth shapes that cannot follow over. The ratchet teeth of the first inner ratchet wheel 401, the first outer ratchet wheel 431, the second inner ratchet wheel 403 and the second outer ratchet wheel 433 are all trapezoidal teeth which cannot exceed the following teeth. The following means: when the wheel is stopped to tread and slide, the output speed is higher than the input speed, the first inner ratchet wheel 401, the first outer ratchet wheel 431, the second inner ratchet wheel 403 and the second outer ratchet wheel 433 can only drive the pawls to rotate together, and idle rotation cannot be generated, so that the design has the advantages that: the input pawl and the ratchet wheel can only run synchronously without overtaking following, so that the input shift rack 50 has feedback power to ensure that the input pawl is not changed centrifugally at the running speed of the vehicle when no input power is supplied.
The working principle of the full-automatic three-stage variable speed driving device is as follows: the invention realizes three-gear speed change, the power is input from the input gear shifting rack 50, and is output by the output gear shifting rack 60, because the output gear shifting rack 60 is fixedly connected with the hub 2, and is finally output by the hub 2, the invention realizes three-gear speed change, the power is input from the input gear shifting rack 50, and drives the input gear shifting rack 51 to rotate, when in the initial position, the outer pawl 5121 of the first double-sided pawl 512 of the input gear shifting rack 51 is meshed with the second inner ratchet 403 of the gear ring 40, when the output gear shifting rack 61 is in the initial position, the inner pawl 6120 of the second double-sided pawl 612 is meshed with the first outer ratchet 431, therefore, the power is input by the gear ring 40, the planet carrier 43 is output, is transmitted to the output gear shifting rack 61 and is finally output by the hub 2, slow gear output is realized, along with the acceleration of the input speed, the centrifugal force of the first balancing weight 511 is increased, the balancing weight 511 is expanded towards the outer circle direction, so that the first double-sided pawl 512 is retracted inwards, when the input speed reaches a certain value, the outer pawl 5121 of the first double-sided pawl 512 of the input gear shifting member 51 is disengaged from the second inner ratchet wheel 403 of the gear ring 40, the inner pawl 5120 of the first double-sided pawl 512 of the input gear shifting member 51 is engaged with the second outer ratchet wheel 433 of the planet carrier 43, and the inner pawl 6120 of the second double-sided pawl 612 of the output gear shifting member 61 is engaged with the first outer ratchet wheel 431, at this time, the magnet block 80 sucks the first balancing weight 511, even if the input speed is reduced, the first balancing weight 511 will not be retracted towards the inner circle, so that the gear shifting is unstable, the power is input from the planet carrier 43 and then output from the planet carrier 43, so as to realize the middle gear shifting, when the input speed is faster, the centrifugal force of the second balancing weight 611 is increased, the balancing weight 611 is extended towards the outer circle, so that the second double-sided pawl 612 is synchronously extended towards the outer circle, and when the output speed reaches a certain value, the inner pawl 6120 of the second double-sided pawl 612 of the output shift piece 61 is separated from the first outer ratchet wheel 431, the outer pawl 6121 of the second double-sided pawl 612 of the output shift piece 61 is meshed with the first inner ratchet wheel 401, power is input from the planet carrier 43, the gear ring 40 is output, high-speed gear is achieved, and therefore full-automatic three-stage speed change is achieved through centrifugal force. The feedback power is realized by the following steps: the hub 2 rotates to drive the second double-sided pawl 612 of the output shift piece 61 to rotate, as long as the speed of the hub 2 does not decrease, the rotating speed of the second double-sided pawl 612 of the output shift piece 61 is the same as that of the hub 2, the centrifugal force is not changed, the second double-sided pawl 612 is still connected with the gear ring 40, the speed of the gear ring 40 is the same as that of the hub 2, so that the planet carrier 43 is driven to rotate, the planet carrier 43 drives the first double-sided pawl 512 of the input shift piece 51 to rotate through the trapezoidal pawl, and therefore the rotating speed of the first double-sided pawl 512 of the input shift piece 51 is guaranteed to be unchanged under the condition that no power is input at the same speed.
In conclusion, the full-automatic three-stage variable speed driving device is compact in structure, convenient to install, high in transmission efficiency and firm in gear shifting, and full-automatic three-stage variable speed is achieved by arranging two sets of gear shifting mechanisms.
The above-mentioned embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be used, not restrictive; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.
Claims (10)
1. A full-automatic three-stage variable speed drive, comprising: center pin, wheel hub and install the speed change mechanism between center pin and wheel hub, speed change mechanism includes: a planetary transmission, an input shift mechanism, and an output shift mechanism, the planetary transmission comprising: ring gear, centre wheel, planet wheel and planet carrier, centre wheel and center pin fixed connection or integrated into one piece, the planet carrier forms the first chamber of acceping with the one end of ring gear, the ring gear is equipped with the first inner wall that is located the first intracavity of acceping, the first inner wall department of ring gear is equipped with first interior ratchet, the planet carrier is equipped with the first outer wall that is located the first intracavity of acceping, the first outer wall department of planet carrier is equipped with first outer ratchet, the planet carrier forms the second with the other end of ring gear and accepts the chamber, the ring gear is equipped with the second inner wall that is located the second and accepts the intracavity, the second inner wall department of ring gear is equipped with the interior ratchet of second, the planet carrier is equipped with the second outer wall that is located the second and accepts the intracavity, the second outer wall department of planet carrier is equipped with the second outer ratchet, input gearshift includes: the input shifting piece frame and the plurality of input shifting pieces arranged on the input shifting piece frame are characterized in that the input shifting piece comprises a first installation part and a first balancing weight arranged on one side face of one end of the first installation part, the other end of the first installation part is provided with a first double-faced pawl, the first installation part is accommodated in a second accommodating cavity, the first installation part is provided with a first positioning hole at a position between the first balancing weight and the first double-faced pawl, the input shifting piece is fixed with the input shifting piece frame through a first fixing piece arranged in the first positioning hole, an inner-face pawl in the first double-faced pawl is matched with a second outer ratchet wheel, an outer-face pawl in the first double-faced pawl is matched with a second inner ratchet wheel, and the output shifting mechanism comprises: the output shifting and blocking device comprises a second mounting part and a second balancing weight arranged on one side surface of one end of the second mounting part, the second mounting part is accommodated in the first accommodating cavity, a second double-sided pawl and a second positioning hole are arranged on the second mounting part, the second double-sided pawl and the second balancing weight are arranged at the same end of the second mounting part, the second positioning hole is arranged at the other end of the second mounting part, the output shifting and blocking device is fixed with the output shifting and blocking device frame through a second fixing part arranged in the second positioning hole, an inner-sided pawl of the second double-sided pawl is matched with the first outer ratchet wheel, and an outer-sided pawl of the second double-sided pawl is matched with the first inner ratchet wheel.
2. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the pawl tooth forms of the first double-sided pawl and the second double-sided pawl are trapezoidal tooth forms which cannot exceed the following tooth forms.
3. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the ratchet wheel teeth of the first inner ratchet wheel, the first outer ratchet wheel, the second inner ratchet wheel and the second outer ratchet wheel are all trapezoidal tooth shapes which cannot exceed the following.
4. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the input shift pieces are connected through balance pull rods.
5. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the output shifting pieces are connected through a balance pull rod.
6. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the outer side of the input shift piece frame is provided with a magnetic block fixing piece, the magnetic block fixing piece is fixedly connected with the input shift piece frame through a third fixing piece, and the magnetic block fixing piece is provided with a magnetic block matched with the first balancing weight.
7. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: one end of the input shifting and blocking piece frame is provided with a first parallel piece, a first ball is arranged between the input shifting and blocking piece frame and the first parallel piece, and a second ball is arranged between the input shifting and blocking piece frame and the hub.
8. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: one end of the output shifting block frame is provided with a second combining piece, and a third ball is arranged between the output shifting block frame and the second combining piece.
9. A full automatic three-stage variable speed drive as claimed in claim 1, wherein: the input shift element frame is provided with a first elastic part for controlling the initial position of the input shift element, and the output shift element frame is provided with a second elastic part for controlling the initial position of the output shift element.
10. A full automatic three-stage variable speed drive as claimed in claim 9, wherein: the first elastic part and the second elastic part are torsion springs or spring pieces.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610769955 | 2016-08-31 | ||
| CN2016107699552 | 2016-08-31 |
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| CN106494562B true CN106494562B (en) | 2022-02-01 |
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| CN201611143039.4A Active CN106494562B (en) | 2016-08-31 | 2016-12-07 | Full-automatic three-level variable speed driving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113895558B (en) * | 2021-11-22 | 2023-03-07 | 深圳洛梵狄变速器有限公司 | Speed changer and hub assembly in bicycle |
| CN114368445B (en) * | 2022-01-25 | 2023-08-08 | 八方电气(苏州)股份有限公司 | Automatic inner five-speed hub |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032797C (en) * | 1990-07-10 | 1996-09-18 | 常殿林 | Bidirectional three-step gear shift flywheel |
| JP3423756B2 (en) * | 1993-12-16 | 2003-07-07 | 株式会社シマノ | Operation structure of bicycle motion device |
| CN1310118A (en) * | 2000-02-25 | 2001-08-29 | 黄志伟 | Speed varying back shaft for bicycle |
| CN1187218C (en) * | 2002-09-28 | 2005-02-02 | 陆颂荫 | Three-speed internal speed variator for rear shaft of bicycle |
| CN100391784C (en) * | 2006-05-11 | 2008-06-04 | 程辉 | Automatic bicycle speed variator |
| CN202337322U (en) * | 2011-10-25 | 2012-07-18 | 上海坚振金属制品厂 | Central-positioned coaxial transmission |
| CN206278218U (en) * | 2016-08-31 | 2017-06-27 | 张家港川梭车业有限公司 | A kind of full-automatic three-step gear shift drive device |
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