CN107972804B - Rear wheel direct-drive variable-speed transmission device - Google Patents
Rear wheel direct-drive variable-speed transmission device Download PDFInfo
- Publication number
- CN107972804B CN107972804B CN201711394328.6A CN201711394328A CN107972804B CN 107972804 B CN107972804 B CN 107972804B CN 201711394328 A CN201711394328 A CN 201711394328A CN 107972804 B CN107972804 B CN 107972804B
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- Prior art keywords
- rear wheel
- wheel
- shaft
- driving
- mounting frame
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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
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
- B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Toys (AREA)
- Automatic Cycles, And Cycles In General (AREA)
Abstract
The invention discloses a rear wheel direct-drive variable-speed transmission device, which comprises: the novel bicycle comprises a frame, a left rear wheel shaft, a right rear wheel shaft, a left rear wheel, a right rear wheel and a rear wheel speed change mechanism, wherein the frame is provided with a left mounting frame and a right mounting frame, the left rear wheel shaft is fixedly connected with the left mounting frame, the right rear wheel shaft is fixedly connected with the right mounting frame, the rear wheel speed change mechanism is arranged at the position of the left mounting frame and/or the position of the right mounting frame, and the rear wheel speed change mechanism drives the left rear wheel hub and/or the right rear wheel hub, so that the structure of the transmission is greatly simplified, and the novel bicycle is convenient to install.
Description
[ field of technology ]
The invention relates to the field of bicycles, in particular to a rear wheel direct-drive variable-speed transmission device.
[ background Art ]
Along with the rapid development of the tourism industry, the application of double rear wheel bicycles is also more and more extensive, a double rear wheel variable speed transmission device in the prior art generally comprises a frame, a rear wheel shaft, rear wheels and a speed change mechanism, wherein the frame comprises two longitudinal beams and a plurality of cross beams, mounting frames are respectively mounted on the two longitudinal beams, the rear wheel shaft penetrates through the mounting frames and is provided with a aligning bearing with the mounting frames, a speed change mechanism mounting frame is mounted between the two longitudinal beams, the speed change mechanism is mounted on the frame, the rear wheel shaft is a power output shaft of the speed change mechanism, and finally, rear wheels at two ends of the rear wheel shaft are driven to rotate, and the rear wheel direct-drive variable speed transmission device with the structure has the defects that: 1. when the double-rear-wheel variable-speed transmission device with the structure works, the rear wheel shafts are always in a rotating state, either one rear wheel is driven, the other rear wheel is driven to follow, or the two rear wheels are simultaneously driven to rotate, so that independent transmission of the two rear wheels cannot be realized; 2. the speed change mechanism is arranged between the two longitudinal beams through the mounting frame, so that the structure is complex, the manufacturing is inconvenient, and 3, the rear axle is easy to swing due to the fact that the aligning bearing is arranged between the mounting frame and the rear axle.
Accordingly, there is a need for a rear wheel direct drive variable speed transmission that solves the above-mentioned problems.
[ invention ]
In order to solve the problems, the invention aims to provide the rear wheel direct-drive variable-speed transmission device which is simple in structure and convenient to install.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a rear wheel direct drive variable speed drive comprising: the bicycle comprises a frame, a left rear wheel axle, a right rear wheel axle, a left rear wheel, a right rear wheel and a rear wheel speed change mechanism, wherein a left mounting frame and a right mounting frame are mounted on the frame, the left rear wheel axle is fixedly connected with the left mounting frame, the right rear wheel axle is fixedly connected with the right mounting frame, the rear wheel speed change mechanism is arranged at the position of the left mounting frame and/or the position of the right mounting frame, and the rear wheel speed change mechanism drives a left rear wheel hub and/or a right rear wheel hub.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the left rear wheel axle and the right rear wheel axle are integrally formed or fixedly connected.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the number of the rear wheel speed change mechanisms is one, and the rear wheel speed change mechanism includes: the driving wheel, the first driving wheel and the second driving wheel are respectively sleeved on the driving shaft, the input wheel is positioned between the first driving wheel and the second driving wheel, a first meshing pair is arranged between the input wheel and the first driving wheel, a second meshing pair is arranged between the input wheel and the second driving wheel, the first driving wheel is connected with the first driven wheel through a first connecting piece, the second driving wheel is connected with the second driven wheel through a second connecting piece, the driving piece is sleeved on the driven shaft and can rotate relative to the driven shaft, the first driven wheel and the second driven wheel are respectively fixedly connected with the driving piece, and the rear wheel speed change mechanism is arranged between a left rear wheel hub and a left mounting frame or between a right rear wheel hub and a right mounting frame.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the number of the rear wheel speed changing mechanisms is two, the rear wheel speed changing mechanism comprises a left rear wheel speed changing mechanism and a right rear wheel speed changing mechanism, the left rear wheel speed changing mechanism is arranged between a left rear wheel hub and a left mounting frame, and the right rear wheel speed changing mechanism is arranged between a right rear wheel hub and a right mounting frame.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the left rear wheel speed change mechanism and the right rear wheel speed change mechanism are identical in structure and all comprise: the driving mechanism comprises a driving shaft, a driven shaft, an input wheel, a first driving wheel, a second driving wheel, a transmission part, a first driven wheel and a second driven wheel, wherein the input wheel, the first driving wheel and the second driving wheel are respectively sleeved on the driving shaft, the input wheel is positioned between the first driving wheel and the second driving wheel, a first meshing pair is arranged between the input wheel and the first driving wheel, a second meshing pair is arranged between the input wheel and the second driving wheel, the first driving wheel is connected with the first driven wheel through a first connecting piece, the second driving wheel is connected with the second driven wheel through a second connecting piece, the transmission part is sleeved on the driven shaft and can rotate relative to the driven shaft, the first driven wheel and the second driven wheel are respectively fixedly connected with the transmission part, a driving shaft of a left rear wheel speed change mechanism is arranged in a left mounting frame, a driving shaft of a right rear wheel speed change mechanism is arranged in a right mounting frame, the transmission part of the left rear wheel speed change mechanism is fixedly connected with a left rear wheel hub, and the transmission part of the right rear wheel speed change mechanism is fixedly connected with a right rear wheel hub.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the left mounting frame and the right mounting frame are respectively fixedly connected or in shock absorption connection with the frame, a first hollow shaft is arranged in the left mounting frame, one end of a driving shaft of the left rear wheel speed change mechanism is contained in the first hollow shaft, the other end of the driving shaft of the left rear wheel speed change mechanism extends out of the first hollow shaft, a second hollow shaft is arranged in the right mounting frame, one end of the driving shaft of the right rear wheel speed change mechanism is contained in the second hollow shaft, and the other end of the driving shaft of the right rear wheel speed change mechanism extends out of the second hollow shaft.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the input wheel comprises a first shaft sleeve and an input wheel body, an overrunning clutch is arranged between the first shaft sleeve and the input wheel body, the first shaft sleeve is sleeved on the driving shaft and can axially move and relatively rotate relative to the driving shaft, and an internal spline is arranged in the first shaft sleeve.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the first driving wheel comprises a second shaft sleeve and a first driving wheel body, the second shaft sleeve is sleeved on the driving shaft and can rotate relatively to the driving shaft, the second shaft sleeve is integrally formed with or fixedly connected with the first driving wheel body, the second shaft sleeve is provided with a first external spline matched with an internal spline of the first shaft sleeve, the second driving wheel comprises a third shaft sleeve and a second driving wheel body, the third shaft sleeve is sleeved on the driving shaft and can rotate relatively to the driving shaft, the third shaft sleeve is integrally formed with or fixedly connected with the second driving wheel body, and the third shaft sleeve is provided with a second external spline matched with the internal spline of the first shaft sleeve.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the first driving wheel, the second driving wheel, the first driven wheel and the second driven wheel are chain wheels or belt wheels, and the first connecting piece and the second connecting piece are chains or driving belts.
Preferably, a rear wheel direct drive variable speed transmission device in the present invention is further provided with: the driven shaft is a rear wheel shaft.
Compared with the prior art, the invention has the following beneficial effects: the rear wheel direct-drive variable-speed transmission device greatly simplifies the structure of the transmission by arranging the driving shaft in the hollow shaft of the shock absorption frame, is convenient to install, directly drives the hub to rotate, and the wheel shaft is fixedly connected with the shock absorption frame, and the disc brake sheet is arranged behind the hub and does not swing with the frame.
[ description of the drawings ]
Fig. 1 is a schematic structural view of a rear wheel direct drive variable speed transmission device in the present invention.
Fig. 2 is a partial enlarged view at a in fig. 1.
Fig. 3 is an exploded view of the left rear wheel transmission mechanism of the present invention.
In fig. 1 to 3: 1. frame, 2, rear axle, 3, left rear wheel, 4, right rear wheel, 5, left rear wheel speed change mechanism, 50, driving shaft, 51, driven shaft, 52, input wheel, 520, first axle sleeve, 521, input wheel body, 522, internal spline, 53, first action wheel, 530, second axle sleeve, 531, first driving wheel body, 532, first external spline, 54, second action wheel, 540, third axle sleeve, 541, second driving wheel body, 542, second external spline, 55, driving member, 56, first driven wheel, 57, second driven wheel, 6, right rear wheel speed change mechanism, 7, left mounting bracket, 70, first hollow axle, 8, right mounting bracket, 80, second hollow axle.
[ detailed description ] of the invention
The following describes the rear wheel direct drive transmission according to the present invention in further detail by way of specific examples.
As shown in fig. 1 to 3, a rear wheel direct drive variable speed transmission device includes: the bicycle comprises a bicycle frame 1, a left rear wheel axle, a right rear wheel axle, a left rear wheel 3, a right rear wheel 4, a left rear wheel speed change mechanism 5 and a right rear wheel speed change mechanism 6, wherein the left rear wheel axle and the right rear wheel axle are integrally formed to form the rear wheel axle 2 together in the embodiment, the left rear wheel axle and the right rear wheel axle can be independently arranged in other embodiments, a left mounting frame 7 and a right mounting frame 8 are mounted on the bicycle frame 1, the left mounting frame 7 and the right mounting frame 8 are respectively fixedly connected with the bicycle frame 1 or in a shock absorption manner, the rear wheel axle 2 is fixedly connected with the left mounting frame 7 and the right mounting frame 8, the left rear wheel speed change mechanism 5 is arranged at the position of the left mounting frame 7, and the right rear wheel speed change mechanism 6 is arranged at the position of the right mounting frame 8.
The left rear wheel speed change mechanism 5 includes: the driving shaft 50, the driven shaft 51, the input wheel 52, the first driving wheel 53, the second driving wheel 54, the driving member 55, the first driven wheel 56 and the second driven wheel 57, the input wheel 52, the first driving wheel 53 and the second driving wheel 54 are respectively sleeved on the driving shaft 50, the input wheel 52 is located between the first driving wheel 53 and the second driving wheel 54, the input wheel 52 comprises a first shaft sleeve 520 and an input wheel body 521, an overrunning clutch (not shown) is arranged between the first shaft sleeve 520 and the input wheel body 521, the first shaft sleeve 520 is sleeved on the driving shaft 50 and can axially move and relatively rotate relative to the driving shaft 50, an inner spline 522 is arranged in the first shaft sleeve 520, the first driving wheel 53 comprises a second shaft sleeve 530 and a first driving wheel body 531, the second shaft sleeve 530 is sleeved on the driving shaft 50 and can relatively rotate relative to the driving shaft 50, the second shaft sleeve 530 is integrally formed or fixedly connected with the first driving wheel 53, a first outer spline 532 matched with the inner spline 522 of the first shaft sleeve 520 is arranged between the second shaft sleeve 520 and the second shaft sleeve 54 comprises a third shaft sleeve 540 and a second outer spline 540 which is integrally formed with the third shaft sleeve 540 and relatively rotates relative to the third shaft sleeve 541, and the third shaft sleeve 540 is rotatably connected with the third shaft sleeve 541. In this embodiment, the input wheel 52 is engaged with the first driving wheel 53 and the second driving wheel 54 by spline connection, however, in other embodiments, other engagement modes such as steel balls and steel grooves may be used, and the present invention may be implemented as well.
The first driving wheel 53 and the first driven wheel 56 are connected by a first connecting member (not shown), the second driving wheel 54 and the second driven wheel 57 are connected by a second connecting member (not shown), in this embodiment, the first driving wheel 53, the first driven wheel 56, the second driving wheel 54 and the second driven wheel 57 are sprockets, the first connecting member and the second connecting member are chains, the driving member 55 is sleeved on the driven shaft 51 and can rotate relative to the driven shaft 51, the first driven wheel 56 and the second driven wheel 57 are fixedly connected with the driving member 55, in this embodiment, the structure of the right rear wheel speed change mechanism 6 is the same as that of the left rear wheel speed change mechanism 5, and of course in other embodiments, the structure of the right rear wheel speed change mechanism 6 can also be different from that of the left rear wheel speed change mechanism 5, or only the left rear wheel speed change mechanism 5 is arranged, a bearing is arranged between the hub of the right rear wheel 4 and the right rear wheel shaft, or only the right rear wheel speed change mechanism 6 is arranged, the bearing is arranged between the hub of the left rear wheel 3 and the left rear wheel shaft, the invention can be realized, the left mounting frame 7 is internally provided with the first hollow shaft 70, one end of the driving shaft 50 of the left rear wheel speed change mechanism 5 is accommodated in the first hollow shaft 70, the other end extends out of the first hollow shaft 70, the right mounting frame 8 is internally provided with the second hollow shaft 80, one end of the driving shaft of the right rear wheel speed change mechanism 6 is accommodated in the second hollow shaft 80, and the other end extends out of the second hollow shaft 80. The transmission member 55 of the left rear wheel transmission mechanism 5 is spline-connected to the hub of the left rear wheel 3, and the transmission member (not shown) of the right rear wheel transmission mechanism 6 is spline-connected to the hub of the right rear wheel 4, and in this embodiment, the driven shaft 51 is a hollow shaft, and the driven shaft 51 is fitted over the rear wheel shaft 2 and is rotatable with respect to the rear wheel shaft 2.
The working principle of the rear wheel direct-drive variable-speed transmission device in the invention is as follows: in the first gear, the input wheel 52 is axially moved to enable the internal spline 522 in the input wheel 52 to be meshed with the first external spline 532 on the first driving wheel 53, power is input by the input wheel 52 to drive the first driving wheel 53 to rotate, the first driven wheel 56 rotates because the first driving wheel 53 is connected with the first driven wheel 56 through the first connecting piece, the driving piece 55 is fixedly connected with the wheel hub because the first driven wheel 56 is fixedly connected with the driving piece 55, the wheel is driven to rotate, at the moment, the second driving wheel 54 and the second driven wheel 57 follow up, in the second gear, the input wheel 52 is axially moved to enable the internal spline 522 in the input wheel 52 to be meshed with the second external spline 542 on the second driving wheel 54, the power is input by the input wheel 52 to drive the second driving wheel 54 to rotate, because the second driving wheel 54 is connected with the second driven wheel 57 through the second connecting piece, the second driven wheel 57 rotates, because the second driven wheel 57 is fixedly connected with the transmission piece 55, the transmission piece 55 is fixedly connected with the wheel hub, and the wheels are driven to rotate, at the moment, the first driving wheel 53 and the first driven wheel 56 follow-up, and the left rear wheel speed change mechanism 5 and the right rear wheel speed change mechanism 6 in the invention are respectively driven independently, so that in the specific implementation process, the power can be input by the left rear wheel 3 and the right rear wheel 4 simultaneously, and the power can be input singly.
In summary, the rear wheel direct-drive variable-speed transmission device greatly simplifies the structure of the transmission by arranging the driving shaft in the hollow shaft of the shock absorption frame, is convenient to install, directly drives the hub to rotate, and is fixedly connected with the shock absorption frame, and the disc brake sheet does not swing with the frame after being installed on the hub.
The above-described embodiments are merely illustrative of the principles and functions of the present invention, and some of the practical examples, not intended to limit the invention; it should be noted that modifications and improvements can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the present invention.
Claims (5)
1. A rear wheel direct drive variable speed drive, comprising: the bicycle comprises a frame, a left rear wheel axle, a right rear wheel axle, a left rear wheel, a right rear wheel and a rear wheel speed changing mechanism, wherein a left mounting frame and a right mounting frame are mounted on the frame, the left rear wheel axle is fixedly connected with the left mounting frame, the right rear wheel axle is fixedly connected with the right mounting frame, the rear wheel speed changing mechanism is arranged at the position of the left mounting frame and the position of the right mounting frame, the rear wheel speed changing mechanism drives the left rear wheel hub and the right rear wheel hub, the number of the rear wheel speed changing mechanisms is two, the bicycle comprises a left rear wheel speed changing mechanism and a right rear wheel speed changing mechanism, the left rear wheel speed changing mechanism is arranged between the left rear wheel hub and the left mounting frame, the right rear wheel speed changing mechanism is arranged between the right rear wheel hub and the right mounting frame, and the left rear wheel speed changing mechanism has the same structure with the right rear wheel speed changing mechanism, and the bicycle comprises the following components: the driving shaft, the driven shaft, the input wheel, the first driving wheel, the second driving wheel, the transmission part, the first driven wheel and the second driven wheel are respectively sleeved on the driving shaft, the input wheel is positioned between the first driving wheel and the second driving wheel, a first meshing pair is arranged between the input wheel and the first driving wheel, a second meshing pair is arranged between the input wheel and the second driving wheel, the first driving wheel is connected with the first driven wheel through a first connecting piece, the second driving wheel is connected with the second driven wheel through a second connecting piece, the transmission part is sleeved on the driven shaft and can rotate relative to the driven shaft, the first driven wheel and the second driven wheel are respectively fixedly connected with the transmission part, the driving shaft of the left rear wheel speed change mechanism is arranged in the left mounting frame, the driving shaft of the right rear wheel speed change mechanism is arranged in the right mounting frame, the transmission part of the left rear wheel speed change mechanism is fixedly connected with the left rear wheel hub, the transmission part of the right rear wheel speed change mechanism is fixedly connected with the right rear wheel hub, the input wheel comprises a first shaft sleeve and an input wheel body, an overrunning clutch is arranged between the first shaft sleeve and the input wheel body, the first shaft sleeve is sleeved on a driving shaft and can axially move and relatively rotate relative to the driving shaft, an internal spline is arranged in the first shaft sleeve, the first driving wheel comprises a second shaft sleeve and a first driving wheel body, the second shaft sleeve is sleeved on the driving shaft and can relatively rotate relative to the driving shaft, the second shaft sleeve is integrally formed or fixedly connected with the first driving wheel body, the second shaft sleeve is provided with a first external spline matched with the internal spline of the first shaft sleeve, the second driving wheel comprises a third shaft sleeve and a second driving wheel body, the third shaft sleeve is sleeved on the driving shaft and can rotate relative to the driving shaft, the third shaft sleeve and the second driving wheel body are integrally formed or fixedly connected, and the third shaft sleeve is provided with a second external spline matched with the internal spline of the first shaft sleeve.
2. A rear wheel direct drive variable speed drive as defined in claim 1, wherein: the left rear wheel axle and the right rear wheel axle are integrally formed or fixedly connected.
3. A rear wheel direct drive variable speed drive as defined in claim 1, wherein: the left mounting frame and the right mounting frame are respectively fixedly connected or in shock absorption connection with the frame, a first hollow shaft is arranged in the left mounting frame, one end of a driving shaft of the left rear wheel speed change mechanism is contained in the first hollow shaft, the other end of the driving shaft of the left rear wheel speed change mechanism extends out of the first hollow shaft, a second hollow shaft is arranged in the right mounting frame, one end of the driving shaft of the right rear wheel speed change mechanism is contained in the second hollow shaft, and the other end of the driving shaft of the right rear wheel speed change mechanism extends out of the second hollow shaft.
4. A rear wheel direct drive variable speed drive as defined in claim 1, wherein: the first driving wheel, the second driving wheel, the first driven wheel and the second driven wheel are chain wheels or belt wheels, and the first connecting piece and the second connecting piece are chains or driving belts.
5. A rear wheel direct drive variable speed drive as defined in claim 1, wherein: the driven shaft is a rear wheel shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394328.6A CN107972804B (en) | 2017-12-21 | 2017-12-21 | Rear wheel direct-drive variable-speed transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711394328.6A CN107972804B (en) | 2017-12-21 | 2017-12-21 | Rear wheel direct-drive variable-speed transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107972804A CN107972804A (en) | 2018-05-01 |
| CN107972804B true CN107972804B (en) | 2023-07-18 |
Family
ID=62007204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711394328.6A Active CN107972804B (en) | 2017-12-21 | 2017-12-21 | Rear wheel direct-drive variable-speed transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107972804B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2815862Y (en) * | 2005-06-21 | 2006-09-13 | 廖远成 | Two-wheel drive mechanism of bicycle |
| CN105351456A (en) * | 2015-12-12 | 2016-02-24 | 威马农业机械有限公司 | Mini-tiller high-low-speed gearshift |
| CN106005214B (en) * | 2016-07-07 | 2018-04-17 | 张家港川梭车业有限公司 | A kind of bicycle two front wheels driving device |
| CN106985960B (en) * | 2017-05-11 | 2022-09-06 | 张家港川梭车业有限公司 | Double-front-wheel direct-drive pawl moving and gear shifting speed change device |
| CN207631425U (en) * | 2017-12-21 | 2018-07-20 | 张家港川梭车业有限公司 | A kind of back wheel direct drive variable speed drive |
-
2017
- 2017-12-21 CN CN201711394328.6A patent/CN107972804B/en active Active
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| Publication number | Publication date |
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| CN107972804A (en) | 2018-05-01 |
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