CN106828762B - Bicycle driving system with hub motor combined with shaft transmission - Google Patents
Bicycle driving system with hub motor combined with shaft transmission Download PDFInfo
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- CN106828762B CN106828762B CN201710164040.3A CN201710164040A CN106828762B CN 106828762 B CN106828762 B CN 106828762B CN 201710164040 A CN201710164040 A CN 201710164040A CN 106828762 B CN106828762 B CN 106828762B
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- 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
- 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
- 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
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The application discloses wheel hub motor combines driven bicycle driving system of axle, connect the axle transmission between axis and wheel hub motor including axis, wheel hub motor and transmission, and axle transmission and wheel hub motor junction adopt the card formula to connect moreover, stable in structure, simple to operate, long service life.
Description
Technical Field
The application relates to the field of electric bicycles, in particular to a bicycle driving system with a hub motor combined with shaft transmission.
Background
The hub motor of the electric vehicle is combined with chain transmission all the time. The chain is exposed outside, is easy to rust and corrode, is unstable in transmission, is easy to fall off, is not easy to wear due to the fact that sundries are involved for lubrication. These drawbacks increase the maintenance costs of the bicycle.
In order to increase the maintenance-free property of the bicycle, the emphasis is placed on optimizing the transmission mechanism of the electric bicycle. In view of the above problems, a chainless shaft transmission device has been devised instead of the chain transmission device. However, the design of the matching structure at the joint of the existing shaft transmission device and the hub motor is not reasonable enough, and the problem of interference is easy to occur.
The present application is hereby presented.
Disclosure of Invention
The purpose of the application is: in order to solve the problems, the bicycle driving system with the hub motor combined with shaft transmission is provided, and the bicycle driving system is stable in structure and long in service life.
The technical scheme of the application is as follows: a bicycle driving system with a hub motor combined with shaft transmission comprises a middle shaft, the hub motor and a shaft transmission device which is in transmission connection between the middle shaft and the hub motor;
the in-wheel motor includes:
a left half shaft and a right half shaft which are coaxially arranged,
the hubs are rotatably sleeved outside the left half shaft and the right half shaft,
a rotor and a stator accommodated in the hub, wherein the stator is relatively fixed with the left half shaft and the right half shaft,
an external sleeve coaxially and rotatably sleeved outside the right half shaft,
the one-way clutch is coaxially arranged with the right half shaft and comprises a clutch inner ring and a clutch outer ring which are matched with each other, wherein the clutch inner ring is fixed with the hub, an inner gear ring is integrally formed on the clutch outer ring, and
a planetary gear reduction mechanism connected between the rotor and the inner gear ring;
the shaft transmission device includes:
a first bevel gear coaxially fixed on the middle shaft,
a second helical gear coaxially and fixedly sleeved on the external sleeve,
a third helical gear in meshed connection with the first helical gear,
a fourth helical gear in meshing engagement with said second helical gear, an
The transmission shaft is coaxially and fixedly connected between the third bevel gear and the fourth bevel gear;
the clutch is characterized in that a ratchet wheel is integrally formed on the inner ring of the clutch, and the external sleeve is provided with: the ratchet wheel, the pawl and the pawl spring are matched to form the ratchet-pawl one-way clutch.
On the basis of the technical scheme, the application also comprises the following preferable scheme:
the second bevel gear and the external sleeve are connected in the following mode: the second helical gear is coaxially provided with a sleeve hole, a clamping rib which extends along the axial straight line of the second helical gear is formed on the hole wall of the sleeve hole, a clamping groove which extends along the straight line and is matched with the clamping rib is formed on the outer wall of the external sleeve, the clamping rib is embedded into the clamping groove along the length direction of the clamping rib, and a clamping spring which locks the second helical gear and the external sleeve in the axial direction is arranged between the second helical gear and the external sleeve.
The shaft transmission device further comprises a shaft sleeve and a frame connecting plate fixed with the shaft sleeve, and the transmission shaft is rotatably arranged in the shaft sleeve through a supporting bearing.
The outer half shaft is movably sleeved with a bushing which is positioned between the first supporting bearing and the second supporting bearing and is positioned in the outer sleeve, the axial inner end face of the bushing is connected with the axial outer end face of the first supporting bearing inner ring in an abutting mode, the bushing is coaxially sleeved with a plane thrust ball bearing, the axial inner end face of the plane thrust ball bearing is abutted against an annular step formed on the outer wall of the bushing in an axially inward mode, and the axial inner end face of the second supporting bearing outer ring is abutted against and connected with the axial outer end face of the plane thrust ball bearing, and a clamp spring is connected in the external sleeve and is connected with the axial outer end face of the second support bearing outer ring in an abutting mode.
The middle shaft is rotatably arranged in the five-way pipe through the middle shaft supporting bearing, two axial ends of the middle shaft extend out of the five-way pipe, and the middle shaft and the five-way pipe are axially locked and fixed through the middle shaft locking cover.
And the clutch inner ring and the hub are locked and fixed through countersunk screws.
The planetary gear reduction mechanism includes:
a sun gear fixed to the rotor and coaxially arranged with the right half shaft,
a planet carrier fixed with the right half shaft, and
at least three planetary gears rotatably connected to the carrier;
the planetary gear is meshed with the sun gear and the inner gear ring at the same time.
The rotor is fixed on a rotating shaft, the rotating shaft is coaxially and rotatably connected between the left half shaft and the right half shaft through supporting bearings arranged at two axial ends of the rotating shaft, and the sun gear is directly formed on the rotating shaft.
The hub motor is of an inner rotor outer stator structure.
The application has the advantages that:
1. this application drives the traveling of bicycle through the mode that axle transmission and in-wheel motor combine, has avoided traditional chain formula transmission to break easily when using and has damaged, accidental injury user, stained user's clothing, the problem that needs frequent maintenance.
2. The junction of the shaft transmission device and the hub motor adopts a special structural design, so that the inner ring and the outer ring of the bearing of the junction can be prevented from receiving staggered axial force, the structural stability of the junction is ensured, and the service life of the driving system is further prolonged.
3. The hub motor of the driving system adopts an inner rotor outer stator and a two-stage speed reduction structure, and is simple and ingenious in structure and stable in performance.
Drawings
The present application is further described with reference to the following figures and examples:
FIG. 1 is a self-contained view of a bicycle drive system in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a hub motor according to an embodiment of the present application;
FIG. 3 is an exploded view of the shaft transmission in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a connection between a shaft transmission device and a hub motor according to an embodiment of the present application;
FIG. 5 is a schematic structural view of an external sleeve according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of a second bevel gear according to an embodiment of the present application;
wherein: 100-hub motor, 200-middle shaft, 300-shaft transmission device, 400-five-way pipe, 500-middle shaft locking cover and 600-middle shaft supporting bearing;
101-left half shaft, 102-right half shaft, 103-wheel hub, 103 a-wheel hub shell, 103 b-wheel hub end cover, 104-rotor, 105-stator, 106-external sleeve, 106 a-clamping groove, 107-clutch inner ring, 108-clutch outer ring, 108 a-internal gear ring, 109-planetary gear speed reducing mechanism, 109 a-sun gear, 109 b-planet carrier, 109 c-planetary gear, 1010-first support bearing, 1011-second support bearing, 1012-bush, 1013-plane thrust ball bearing, 1014-clamping spring, 1015-rotating shaft, 1016-lock nut;
301-first bevel gear, 302-second bevel gear, 302 a-clamping rib, 303-third bevel gear, 304-fourth bevel gear, 305-transmission shaft, 306-shaft sleeve, 307-frame connecting plate.
Detailed Description
Fig. 1 to 6 show a specific embodiment of the bicycle drive system of the present application, which includes a bottom bracket 200, a hub motor 100, and a shaft transmission 300 drivingly connected between the bottom bracket and the hub motor.
In-wheel motor 100 is the outer stator structure of inner rotor, and it mainly includes: left axle shaft 101, right axle shaft 102, wheel hub 103, rotor 104, stator 105, external sleeve 106, one-way clutch and planetary gear reduction 109. Wherein:
the left half shaft 101 and the right half shaft 102 are coaxially arranged and are horizontally fixed on a rear frame of the electric bicycle in practical application.
The hub 103 is rotatably mounted on the left axle shaft 101 and the right axle shaft 102 via two support bearings (not shown). The hub 103 is composed of a hub shell 103a and a hub cover 103b fixed together by countersunk screws, the hub shell 103a is rotatably sleeved outside the left half shaft 101 by one of the support bearings, and the hub cover 103b is rotatably sleeved outside the right half shaft 102 by the other support bearing. In practice, the hub 103 is also the motor housing of the hub motor 100.
The rotor 104 and the stator 105 are both accommodated in the hub 103, wherein the stator 105 is relatively fixed with the left and right half shafts.
An external sleeve 106 is coaxially and rotatably sleeved outside the right half shaft 102.
The one-way clutch and the right half shaft 102 are coaxially arranged and comprise a clutch inner ring 107 and a clutch outer ring 108 which are matched with each other, wherein the clutch inner ring 107 is fixed with the hub 103 through a countersunk head screw, and an inner gear ring 108a is integrally formed on the clutch outer ring 108. In this embodiment, the one-way clutch is an overrunning clutch, and further includes a roller and a spring disposed between a clutch inner race and a clutch outer race.
The planetary gear reduction mechanism 109 is drivingly connected between the rotor 104 and the ring gear 108 a. Specifically, the planetary gear speed reduction mechanism includes: a sun gear 109a fixed to the rotor 104 and arranged coaxially with the right half shaft 102, a carrier 109b fixed to the right half shaft 102, and three planet gears 109c rotatably connected to the carrier, the planet gears 109c being simultaneously in meshing connection with the sun gear 109a and the ring gear 108 a. It can be seen that the planetary gear reduction mechanism 109 is a two-stage reduction.
The shaft transmission 300 is mainly composed of a first helical gear 301, a second helical gear 302, a third helical gear 303, a fourth helical gear 304, and a transmission shaft 305. Wherein:
the first bevel gear 301 is coaxially fixed on the middle shaft 200, and the first bevel gear and the middle shaft can be of a split structure or an integrated structure.
The second bevel gear 302 is coaxially secured to the circumscribing sleeve 106.
The third bevel gear 303 is in meshing connection with the first bevel gear 301, and the fourth bevel gear 304 is in meshing connection with the second bevel gear 302.
The transmission shaft 305 is fixedly connected between the third helical gear 303 and the fourth helical gear 304, and the transmission shaft 305 is coaxially arranged with the third helical gear 303 and the fourth helical gear 304, i.e. three are coaxially arranged and fixed to each other.
In practical application, the cranks are connected to two ends of the middle shaft 200, pedals are mounted on the cranks, the motor housing (i.e., the hub 103) of the in-wheel motor 100 is coaxially connected with the rear wheel of the vehicle, and the left half shaft 101 and the right half shaft are horizontally fixed on the frame. The rider steps on the pedal to drive the middle shaft 200 to rotate through the crank, the middle shaft 200 drives the motor housing (i.e., the hub 103) of the in-wheel motor 100 to rotate through the shaft transmission mechanism, and the hub 103 drives the rear wheel of the vehicle to rotate to drive the vehicle to move forward.
In order to ensure the structural stability of the shaft transmission device 300 and facilitate the installation of the shaft transmission device 300 on the vehicle frame, and simultaneously avoid the potential safety hazard of the transmission shaft 305 directly exposed in the environment, in order to further provide the shaft sleeve 306 and the vehicle frame connecting plate 307 fixed with the shaft sleeve, the transmission shaft 305 is rotatably arranged in the shaft sleeve 306 through the supporting bearing, and the number of the vehicle frame connecting plates 307 is two. In actual use, the frame connection plate 307 is fixedly connected to the frame by bolts. The middle shaft 200 is rotatably inserted into the five-way pipe 400 through the middle shaft support bearing 600, two axial ends of the middle shaft 200 extend out of the five-way pipe 400, and the middle shaft 200 and the five-way pipe 400 are axially locked and fixed through the middle shaft locking cover 500. The axle sleeve 306 is a split structure, and includes a middle axle sleeve and two axle sleeve seats bolted at both ends of the axle sleeve.
In this embodiment, the connection manner between the second bevel gear 302 and the external sleeve 106 is as follows:
the second helical gear 302 is coaxially provided with a sleeve hole, a clamping rib 302a which extends along the axial direction straight line is formed on the hole wall of the sleeve hole, a clamping groove 106a which extends along the straight line and is matched with the clamping rib is formed on the outer wall of the external sleeve 106, and the clamping rib 302a is embedded into the clamping groove 106a along the length direction of the clamping rib, so that the circumferential fixation of the second helical gear 302 and the external sleeve 106 is realized. And a clamp spring (not labeled in the figure) for axially locking the second bevel gear 302 and the external sleeve 106 is arranged between the two.
Furthermore, a first support bearing 1010 and a second support bearing 1011 are supported between the circumscribed sleeve 106 and the right half-shaft 102, and the first support bearing 1010 is located axially inward of the second support bearing 1011. First support bearing 1010 and second support bearing 1011 all include rotation fit's bearing inner circle and bearing outer lane, and the activity cover is equipped with and is located between first support bearing 1010 and the second support bearing 1011 on the right semi-axis 102, and is located the bush 1012 of external sleeve 106. The axially inner end face of the bush 1012 is in abutting connection with the axially outer end face of the bearing inner ring of the first support bearing 1010. The liner 1012 is coaxially fitted with a flat thrust ball bearing 1013, and an axially inner end surface of the flat thrust ball bearing 1013 abuts axially inwardly against an annular step formed on the outer wall of the liner 1012 (i.e., an annular step formed on the outer wall of the liner 1012). The axial inner end face of the outer ring of the second support bearing 1011 abuts against and is connected with the axial outer end face of the planar thrust ball bearing 1013. A snap spring 1014 is connected inside the circumscribed sleeve 106, and the snap spring 1014 is connected in abutting contact with the axially outer end surface of the outer bearing ring of the second support bearing 1011.
The advantage of the above connection between the second bevel gear 302 and the external sleeve 106 is that: since the second bevel gear 302 and the fourth bevel gear 304 are both bevel gears, the fourth bevel gear 304 exerts an inward pressure on the second bevel gear 302 along the axial direction of the second bevel gear during the meshing transmission. The axial force applied to the second bevel gear 302 is applied to the outer sleeve 106, the outer sleeve 106 is applied to the outer bearing ring of the second support bearing 1011 through the clamp spring 1014, the outer bearing ring of the second support bearing 1011 is applied to the flat thrust ball bearing 1013, the flat thrust ball bearing 1013 is applied to the inner bearing ring of the first support bearing 1010 through the bushing 1012, and the inner bearing ring of the first support bearing 1010 applies the axial force to the right half shaft 102 (the right half shaft 102 is fixed on the frame and does not move). So can avoid first support bearing 1010's bearing inside and outside circle to receive the power that the axial is staggered, also avoid second support bearing 1011's bearing inside and outside circle to receive the power that the axial is staggered simultaneously, guarantee the stability of first support bearing 1010 and second support bearing 1011's structure and work.
The specific installation mode of the rotor 104 in the hub 103 is as follows: the rotor 104 is fixed to a rotating shaft 1015, and the rotating shaft 1015 is coaxially and rotatably connected between the left half shaft 101 and the right half shaft 102 through support bearings arranged at both axial ends thereof. The sun gear 109a is directly molded on the rotating shaft 1015. In other words, the rotating shaft 1015 is formed with a circle of middle shaft teeth, which is the above-mentioned sun gear 109 a.
The first support bearing 1010 is a 6801 bearing, and the second support bearing 1011 is a 16001 bearing.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present application, and the present application is not limited thereto. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.
Claims (7)
1. A bicycle driving system with a hub motor combined with shaft transmission comprises a middle shaft (200), a hub motor (100) and a shaft transmission device (300) which is in transmission connection between the middle shaft and the hub motor, and is characterized in that,
the in-wheel motor (100) includes:
a left half shaft (101) and a right half shaft (102) which are coaxially arranged,
a wheel hub (103) rotatably sleeved outside the left half shaft and the right half shaft,
a rotor (104) and a stator (105) accommodated in the hub (103), wherein the stator (105) is fixed relative to the left half shaft (101) and the right half shaft (102),
an external sleeve (106) coaxially and rotatably sleeved outside the right half shaft,
the one-way clutch is coaxially arranged with the right half shaft and comprises a clutch inner ring (107) and a clutch outer ring (108) which are matched with each other, wherein the clutch inner ring (107) is fixed with the hub (103), and an inner gear ring (108a) are integrally formed on the clutch outer ring (108)
A planetary gear reduction mechanism (109) connected between the rotor and the ring gear;
the shaft transmission device (300) comprises:
a first bevel gear (301) coaxially fixed to the center shaft (200),
a second bevel gear (302) coaxially and fixedly sleeved on the external sleeve (106),
a third bevel gear (303) in meshing connection with the first bevel gear (301),
a fourth bevel gear (304) in meshing engagement with said second bevel gear (302), and
a transmission shaft (305) coaxially and fixedly connected between the third helical gear and the fourth helical gear;
the clutch inner ring (107) is integrally formed with a ratchet wheel, and the external sleeve (106) is provided with: the ratchet wheel, the pawl and the pawl spring are matched to form a ratchet-pawl one-way clutch;
the clutch inner ring (107) and the hub (103) are locked and fixed through countersunk screws;
the hub motor (100) is of an inner rotor outer stator structure.
2. The in-wheel motor in combination with a shaft driven bicycle drive system of claim 1, wherein the second bevel gear (302) is connected to the circumscribing sleeve (106) in a manner that: the second bevel gear (302) is coaxially provided with a sleeve hole, a clamping rib (302a) which extends along the axial direction of the sleeve hole is formed on the hole wall of the sleeve hole, a clamping groove (106a) which extends along the axial direction of the sleeve hole and is matched with the clamping rib is formed on the outer wall of the external sleeve (106), the clamping rib (302a) is embedded into the clamping groove (106a) along the length direction of the clamping rib, and a clamping spring which axially locks the second bevel gear (302) and the external sleeve (106) is arranged between the second bevel gear and the external sleeve.
3. Bicycle drive system with in-wheel motor in combination with a shaft transmission according to claim 2, characterised in that the shaft transmission (300) further comprises a shaft sleeve (306) and a frame connection plate (307) fixed to the shaft sleeve, the transmission shaft (305) being rotatably arranged in the shaft sleeve (306) by means of a support bearing.
4. The bicycle driving system with the combination of the hub motor and the shaft transmission as claimed in claim 2 or 3, wherein the external sleeve (106) and the right half shaft (102) support a first support bearing (1010) and a second support bearing (1011) which are axially spaced apart from each other, the first support bearing (1010) is located on the axial inner side of the second support bearing (1011), the first support bearing (1010) and the second support bearing (1011) both comprise a bearing inner ring and a bearing outer ring which are matched in a rotating manner, a bushing (1012) which is located between the first support bearing (1010) and the second support bearing (1011) and located in the external sleeve (106) is movably sleeved on the right half shaft (102), an axial inner end face of the bushing (1012) is connected with an axial outer end face of the bearing inner ring of the first support bearing (1010) in an abutting manner, and a planar thrust ball bearing (1013) is coaxially sleeved on the bushing (1012), the axial inner end face of the plane thrust ball bearing (1013) is axially and inwardly abutted against an annular step formed on the outer wall of the bushing (1012), the axial inner end face of the outer bearing ring of the second support bearing (1011) is abutted against and connected with the axial outer end face of the plane thrust ball bearing (1013), a clamp spring (1014) is connected in the external sleeve (106), and the clamp spring (1014) is abutted against and connected with the axial outer end face of the outer bearing ring of the second support bearing (1011).
5. The bicycle driving system with the combination of the in-wheel motor and the shaft transmission as claimed in claim 1, wherein the middle shaft (200) is rotatably inserted into the through-hole (400) through a middle shaft support bearing (600), and two axial ends of the middle shaft (200) extend out of the through-hole (400), and the middle shaft (200) and the through-hole (400) are axially locked and fixed through a middle shaft locking cover (500).
6. A bicycle drive system with an in-wheel motor in combination with a shaft transmission according to claim 1, characterised in that the planetary gear reduction mechanism (109) comprises:
a sun gear (109a) fixed to the rotor (104) and arranged coaxially with the right axle shaft (102),
a planet carrier (109b) fixed to the right half-shaft (102), and
at least three planet gears (109c) rotatably connected to the planet carrier (109 b);
the planet gears (109c) are simultaneously in meshed connection with the sun gear (109a) and the ring gear (108 a).
7. The in-wheel motor and shaft transmission combined bicycle driving system according to claim 6, wherein the rotor (104) is fixed on a rotating shaft (1015), the rotating shaft (1015) is coaxially and rotatably connected between the left half shaft (101) and the right half shaft (102) through supporting bearings arranged at two axial ends of the rotating shaft, and the sun gear (109a) is directly molded on the rotating shaft (1015).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164040.3A CN106828762B (en) | 2017-03-20 | 2017-03-20 | Bicycle driving system with hub motor combined with shaft transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164040.3A CN106828762B (en) | 2017-03-20 | 2017-03-20 | Bicycle driving system with hub motor combined with shaft transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106828762A CN106828762A (en) | 2017-06-13 |
| CN106828762B true CN106828762B (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164040.3A Active CN106828762B (en) | 2017-03-20 | 2017-03-20 | Bicycle driving system with hub motor combined with shaft transmission |
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| CN (1) | CN106828762B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108045384A (en) * | 2018-01-18 | 2018-05-18 | 八方电气(苏州)股份有限公司 | Small rail car driving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100491743B1 (en) * | 2003-04-21 | 2005-05-27 | 주식회사 바이크밸리 | The moment of aforce transmission apparatus for bicycle |
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| DE69633686D1 (en) * | 1995-07-28 | 2004-11-25 | Shimano Kk | Bicycle drive device |
| CN2488806Y (en) * | 2001-05-09 | 2002-05-01 | 张永财 | Transmission device for bicycle |
| CN101758900A (en) * | 2010-02-03 | 2010-06-30 | 邬振华 | Gearbox motor integral rotating device for electric motorcycle tricycle and driving method thereof |
| CN102710062A (en) * | 2012-06-08 | 2012-10-03 | 苏州八方电机科技有限公司 | Roller brake motor device |
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| CN106828762A (en) | 2017-06-13 |
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