CN105292370A - Mid-mounted motor of electric bicycle - Google Patents
Mid-mounted motor of electric bicycle Download PDFInfo
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- CN105292370A CN105292370A CN201410233956.6A CN201410233956A CN105292370A CN 105292370 A CN105292370 A CN 105292370A CN 201410233956 A CN201410233956 A CN 201410233956A CN 105292370 A CN105292370 A CN 105292370A
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- gear
- elastic deformation
- electric bicycle
- sleeve pipe
- axis
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- 230000005489 elastic deformation Effects 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims description 21
- 238000005859 coupling reaction Methods 0.000 claims description 21
- 230000008878 coupling Effects 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a mid-mounted motor of an electric bicycle. The mid-mounted motor comprises a connecting sleeve, a machine casing, a middle shaft, a sprocket wheel, and an elastic deformation sleeving pipe, wherein the machine casing and the connecting sleeve are connected integrally; the middle shaft is rotationally assembled in the connecting sleeve through a first supporting bearing and a second supporting bearing; the sprocket wheel sleeves the middle shaft; the elastic deformation sleeving pipe sleeves the middle shaft and can generate circumferential direction deformation when being subject to circumferential direction torsional force; external threads are formed in one end of the connecting sleeve, and spacing steps are molded at the other end of the connecting sleeve; one end of the elastic deformation sleeving pipe is fixed to the middle shaft, and the other end of the elastic deformation sleeving pipe is connected with the sprocket wheel; two sets of magnetic loops which are distributed at intervals are arranged on the elastic deformation sleeving pipe; a signal processing circuit board is fixedly arranged on the inner wall of the connecting sleeve; hall elements corresponding to the two sets of the magnetic loops are integrated on the signal processing circuit board; the signal processing circuit board is connected with a motor controller through a signal outgoing line. The mid-mounted motor of the electric bicycle, disclosed by the invention, is simple and compact in structure, and easy to mount.
Description
Technical field
The present invention relates to a kind of electric bicycle motor, this motor can be arranged on ordinary bicycle.
Background technology
It is a kind of vehicle American-European and Japanese the most popular at present that pin steps on assistance type Electrical Bicycle, this car only detects when people's pin is stepped on that people's pin steps on the size of moment and corresponding drive motor is afterburning, the mode gathering moment has a variety of, wherein torque sensor being placed in axis (B.B.PART) is the mode that Europe is popular at present, its advantage is the little good concealment highly versatile of volume, owing to being the standard form parts of bicycle, be therefore conducive to batch manufacturing.The FAG (world-renowned backup bearing maker) of current Germany, THUN company are proposed the torque sensor of central-axis type, and the assistance type Electrical Bicycle released after doctor (BOCHS) company is improved has had the market share in Europe 25%.
But existing electric bicycle motor ubiquity complex structure, profile is huge, is difficult to the shortcomings such as assembling.
Summary of the invention
The present invention seeks to: for the problems referred to above, provide one simple and compact for structure and easy-on electric bicycle motor.
Technical scheme of the present invention is: described electric bicycle motor, comprise coupling bush, the casing be connected as a single entity with this coupling bush, the axis be assemblied in described coupling bush is rotated by the first backup bearing and the second backup bearing, be enclosed within the chain wheel on this axis, and to be enclosed within described axis and the elastic deformation sleeve pipe of circumferential deformation can be produced when it is subject to circumferential twisting resistance, one end of coupling bush is shaped with outside thread, the other end forms limited step, one end and the axis of elastic deformation sleeve pipe are fixed, the other end is connected with chain wheel, elastic deformation sleeve pipe is provided with two groups of magnet rings spaced apart, the inwall of coupling bush is fixedly installed and signal processing circuit plate, signal processing circuit plate is integrated with and described two groups of Hall elements that magnet ring is corresponding, signal processing circuit plate is connected with electric machine controller through signal pig-tail wire,
Be provided with stator, rotor and the motor tooth axle fixing with described rotor in described casing, described motor tooth axle is in transmission connection by gear reduction and described chain wheel.
Described gear reduction comprises and intermeshing first gear of described motor tooth axle, the second gear be coaxially connected with this first gear and three gear intermeshing with the second gear.
Linked together by following version between the end of described elastic deformation sleeve pipe and chain wheel: the 3rd gear is located on axis by the 3rd backup bearing rotary sleeve, described chain wheel is fixed on the 3rd gear, the first free-wheel clutch is provided with between 3rd gear and elastic deformation sleeve pipe, this first free-wheel clutch comprises power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and the 3rd gear are fixed, and power-transfer clutch inner ring and elastic deformation cannula tip are fixed.
Linked together by the second unidirectional backup bearing between described second gear and the first gear, this second free-wheel clutch comprises power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and described first gear are fixed, and power-transfer clutch inner ring and the second gear are fixed.
Described casing is made up of chassis body and the shell end cover be fixedly connected on this chassis body and waterproof plastic lid, a gear cavity is formed in described chassis body, gear cavity is connected with detouchable gear cap, described first gear and the second gear are arranged in this gear containing cavity.
Be provided with the 4th backup bearing between described second gear and gear cap, between the second gear and chassis body (6), be provided with the 5th backup bearing.
Described chassis body is connected with detouchable controller mounting box, described electric machine controller is arranged in this controller mounting box.
Described elastic deformation sleeve pipe comprises resilient deformation section and is integrally formed at the left canned paragraph at the left and right two ends of this resilient deformation section and right canned paragraph, described resilient deformation section has at least one H-type groove, described H-type groove has the deep-slotted chip breaker that two circumferences extend and the axial groove be communicated between two deep-slotted chip breakers, the circumferential lengths of described deep-slotted chip breaker is less than the periphery length of resilient deformation section, and two groups of described magnet rings are separately positioned on the position of left and right canned paragraph near resilient deformation section.
Described left canned paragraph is provided with kidney-shaped spacing hole, described axis radially offers a pin-and-hole, and be fixedly equipped with a locating dowel pin stretched in kidney-shaped spacing hole in this pin-and-hole, described locating dowel pin can in the inner circumferential motion of kidney-shaped spacing hole.
Advantage of the present invention is:
1, this Electrical Bicycle of the present invention produces distortion by after the elastic deformation sleeve stress be installed between axis and chain wheel, and then make, between on elastic deformation sleeve pipe two groups of magnet rings, angle displacement occurs, and then induce axis Moment size, regulate the horsepower output of motor.Very important person is to the foot-operated reinforcing of crank end, just have signal transmission to electric machine controller, motor is worked immediately, there is comfort level of well riding, and the corresponding parameter of setting can be required according to the difference of client, to adjust motor power output and artificial afterburning ratio.
2, this built-in motor of the present invention is very simple in the installation process of bicycle motor, only coupling bush need to be penetrated in Five-way tube and can realize fixing on vehicle frame of this motor with jam nut locking, not needing the structure of changing original cycle frame Five-way tube.
3, electric machine controller disassembles from motor very easily, is convenient to maintenance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is this electric bicycle motor of embodiment of the present invention cross-sectional view;
Fig. 2 is the structural representation of axis in inventive embodiments;
Fig. 3 is the lateral plan of inventive embodiments Elastic deformed casing;
Fig. 4 is the cross-sectional view of inventive embodiments Elastic deformed casing
Wherein: 1-shell end cover, 2-the 6th backup bearing, 3-stator, 4-rotor, 5-motor tooth axle, 6-chassis body, 7-gear cap, 8-the 4th backup bearing, 9-second free-wheel clutch, 10-first gear, 11-the 5th backup bearing, 12-controller mounting box, 13-second gear, 14-waterproof plastic lid, 15-chain wheel, 16-the 7th backup bearing, 17-first free-wheel clutch, 18-the 3rd backup bearing, 19-the 3rd gear, 20-cover plate, 21-coupling bush, 2101-limited step, 22-first backup bearing, 23-locating dowel pin, 24-signal processing circuit plate, 25-elastic deformation sleeve pipe, 2501-resilient deformation section, 25011-H type groove, 25011a-deep-slotted chip breaker, 25011b-axial groove, the left canned paragraph of 2502-, 25021-kidney-shaped spacing hole, the right canned paragraph of 2503-, 26-magnet ring, 27-second backup bearing, 28-opening nut, 29-axis, 2901-pin-and-hole.
Detailed description of the invention
Fig. 1 ~ Fig. 4 illustrates a specific embodiment of this electric bicycle motor of the present invention, and it comprises coupling bush 21 and casing, and coupling bush 21 and casing are connected as a single entity.One end of coupling bush 21 is shaped with outside thread (not shown), and the other end forms limited step 2101.During assembling, coupling bush 29 is located in the Five-way tube (not shown in FIG.) of bicycle, and make the thread end of coupling bush 29 stretch out outside Five-way tube, then on the outside thread of coupling bush 21 end, jam nut is locked, limited step 2101 combined action of jam nut and coupling bush 21 other end, thus jam nut and bicycle five-pipe are tightly fixed together.
Rotated by the first backup bearing 22 and the second backup bearing 27 in described coupling bush 21 and be equipped with axis 29, on this axis 29, cover has chain wheel 15, and wherein the first backup bearing 22 is needle bearing.During embody rule, between this chain wheel 15 and bicycle rear chain drum, driving chain is installed.On described axis 29, also cover has an elastic deformation sleeve pipe 25, can produce circumferential deformation when this elastic deformation sleeve pipe 25 is subject to circumferential twisting resistance.In Fig. 1, one end of elastic deformation sleeve pipe 25 is fixed by spline and axis 29, and left end is connected with chain wheel 15.Elastic deformation sleeve pipe 25 is provided with two groups of magnet rings 26 that left and right is spaced apart, the inwall of coupling bush 21 is fixed with and signal processing circuit plate 24, signal processing circuit plate 24 is integrated with and described two groups of Hall elements that magnet ring 26 is corresponding, signal processing circuit plate 24 is connected with electric machine controller through signal pig-tail wire.During practical application, at axis 29 two ends, crank need be installed, crank be installed foot-operated.
The principle of work of the present embodiment is: when there being left and/or right step assembly reinforcing under condition of loading, axis 2 rotates, elastic deformation sleeve pipe 3 is stressed be distorted after drive flange 6 and fluted disc 1 relatively axis produce angular transposition, simultaneously two groups of Hall elements 9 be out of shape by elastic deformation sleeve pipe 3 after the size of two magnet rings, 7 differential seat angle signals, the torque signals that people's pin is stepped on detected, to control the horsepower output of motor, provide corresponding power-assisted.
When cycling person tramp with one's feet dynamic pedal drive axis 29 rotate time, the twisting resistance that axis 29 is subject to passes to elastic deformation sleeve pipe 25 left end in FIG by spline 23, circumferential torsional deflection is there is in elastic deformation sleeve pipe 25 after being subject to twisting resistance, thus make to produce angular transposition between on elastic deformation sleeve pipe 25 two groups of magnet rings 26, signal processing circuit plate 24 induces this torque signals by Hall element integrated on it and this torque signals is passed to electric machine controller by output line, then by adjusting the horsepower output of motor after electric machine controller process.It is larger that bicyclist steps on foot-operated strength, and the twisting resistance that elastic deformation sleeve pipe 25 is subject to is larger, and the deflection of elastic deformation sleeve pipe 25 is larger, and the torque signals that Hall element senses is larger.
Be provided with stator 3, rotor 4 and the motor tooth axle 5 fixing with described rotor 4 in described casing, be provided with the 6th backup bearing 2 between motor tooth axle 5 and casing, described motor tooth axle 5 is in transmission connection by gear reduction and described chain wheel 15.After electrical power runs, rotor 4 drive motor tooth axle 5 rotates, and motor tooth axle 5 is rotated by gear reduction band movable chain wheel 15, and then drives bicycle to move ahead.
This example adopts internal rotor outer stator structure.
In this example, described gear reduction concrete structure is as follows: it comprise with intermeshing first gear 10 of described motor tooth axle 5, with coaxial the second gear 13 that is connected of this first gear 10 and three gear 19 intermeshing with the second gear 13.Wherein the diameter of the first gear 10 is greater than between the second gear the 13, three gear 19 and is greater than the first gear 10.
In this example, linked together by following version between the end of described elastic deformation sleeve pipe 25 and chain wheel 15: the 3rd gear 19 is located on axis 29 by the 3rd backup bearing 18 rotary sleeve, chain wheel 15 is fixed on the 3rd gear 19, the first free-wheel clutch 17 is provided with between 3rd gear 19 and elastic deformation sleeve pipe 25, this first free-wheel clutch 17 comprises power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and the 3rd gear 19 are fixed, and power-transfer clutch inner ring and elastic deformation sleeve pipe 25 end winding support.
The benefit of said structure is adopted to be: when making bicycle be in pure motor driving pattern when rotor 4 is with movable chain wheel 15 to rotate, the Internal and external cycle of the first free-wheel clutch is in released state and can relatively rotates, axis 29 can not transfer, from but be fixed on the difference at axis two ends can not transfer.And when the motor people that do not work steps on foot-operated and makes bicycle be in pure manpower ride mode, the Internal and external cycle of the first free-wheel clutch is locked mutually, manpower tramples the foot-operated of crank two ends, the 3rd gear 19 is driven by axis 29, the 3rd gear 19 is had to be with movable chain wheel 15 to rotate again, and then moved ahead by manpower driving bicycle, can normally as ordinary bicycle ride.
In this example, described first free-wheel clutch 17 is a click apparatus, and is provided with the 7th backup bearing 16 between the 3rd gear 19 and elastic deformation sleeve pipe 25 in this example.
In this example, linked together by the second unidirectional backup bearing 19 between described second gear 13 and the first gear 10, this second free-wheel clutch 9 comprises also power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and described first gear 10 are fixed, and power-transfer clutch inner ring and the second gear 13 are fixed.
The benefit of said structure is adopted to be to alleviate resistance when manpower is ridden.Principle is as follows: when manpower is ridden, chain wheel 15 can be rotated with the second gear 13 by the 3rd gear 19, at this moment the Internal and external cycle of the second unidirectional backup bearing 9 is in released state, and the first gear 10 and rotor 4 therefore can not be driven to rotate, thus it is lighter to guarantee to ride.And when electrical power runs, as long as electrically operated speed exceedes the speed that manpower is ridden, the second unidirectional backup bearing 9 will be in tight state of closing, thus ensure that electrical drive power can pass to chain wheel 15.
As shown in Figure 1, casing described in this example is made up of chassis body 6 and the shell end cover 1 be fixedly connected on this chassis body 6 and waterproof plastic lid 14, a gear cavity is formed in described chassis body 6, gear cavity is connected with detouchable gear cap 8, the first described gear 10 and the second gear 13 are arranged in this gear containing cavity.
Be provided with between described second gear 13 and gear cap 8 between the 4th backup bearing 8, second gear 13 and chassis body 6 and be provided with the 5th backup bearing 11.
And this example is connected with detouchable controller mounting box 12 on described chassis body 6, described electric machine controller is arranged in this controller mounting box 12.Thus facilitate the dismounting of electric machine controller, easy access.
In this example, the concrete structure of described elastic deformation sleeve pipe 25 can refer to shown in Fig. 3, it comprises resilient deformation section 2501 and is integrally formed at this resilient deformation section 2501 left, the left canned paragraph 2502 at right two ends and right canned paragraph 2503, described resilient deformation section 2501 has two axis to stagger and the H-type groove 25011 that also staggers of circumference, described H-type groove 25011 has the deep-slotted chip breaker 25011a that two circumferences extend and the axial groove 25011b be communicated between two deep-slotted chip breaker 25011a, the circumferential lengths of described deep-slotted chip breaker 25011a is less than the periphery length of resilient deformation section 2501, two groups of described magnet rings 26 are separately positioned on a left side, right canned paragraph 2502, 2503 near the position of resilient deformation section 2501.
The structure of above-mentioned elastic deformation sleeve pipe 25 is comparatively novel, compares with parallel slot elastic deformation sleeve pipe with traditional plug helix elastic deformation sleeve pipe, has that deformation angle is large, stress relief is even, easy to process, good linearity feature.
Described left canned paragraph 2502 is provided with kidney-shaped spacing hole 25021, described axis 29 radially offers a pin-and-hole 2901, and in this pin-and-hole 2901, being fixedly equipped with a locating dowel pin 23 stretched in kidney-shaped spacing hole 25021, described locating dowel pin 23 can in kidney-shaped spacing hole 25021 inner circumferential motion.The setting of this locating dowel pin 23, not only serves position-limiting action, and avoids elastic deformation sleeve pipe 25 excessive distortion and burst.
Certainly, above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to people can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to the Spirit Essence of main technical schemes of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (9)
1. an electric bicycle motor, it is characterized in that: it comprises coupling bush (21), the casing be connected as a single entity with this coupling bush (21), the axis (29) be assemblied in described coupling bush (21) is rotated by the first backup bearing (20) and the second backup bearing (27), be enclosed within the chain wheel (15) on this axis (29), and it is upper and can produce the elastic deformation sleeve pipe (25) of circumferential deformation when it is subject to circumferential twisting resistance to be enclosed within described axis (1), one end of coupling bush (21) is shaped with outside thread, the other end forms limited step (2101), one end of elastic deformation sleeve pipe (25) and axis (29) are fixed, the other end is connected with chain wheel (15), elastic deformation sleeve pipe (25) is provided with two groups of magnet rings (26) spaced apart, the inwall of coupling bush (21) is fixedly installed and signal processing circuit plate (24), signal processing circuit plate (24) is integrated with the Hall element corresponding with described two groups of magnet rings (26), signal processing circuit plate (24) is connected with electric machine controller through signal pig-tail wire,
Be provided with stator (3), rotor (4) and the motor tooth axle (5) fixing with described rotor (4) in described casing, described motor tooth axle (5) is in transmission connection by gear reduction and described chain wheel (15).
2. electric bicycle motor according to claim 1, is characterized in that: described gear reduction comprise with described intermeshing first gear of motor tooth axle (5) (10), with coaxial the second gear (13) that is connected of this first gear (10) and three gear (19) intermeshing with the second gear (13).
3. electric bicycle motor according to claim 2, it is characterized in that being linked together by following version between the end of described elastic deformation sleeve pipe (25) and chain wheel (15): the 3rd gear (19) is located on axis (29) by the 3rd backup bearing (18) rotary sleeve, described chain wheel (15) is fixed on the 3rd gear (19), the first free-wheel clutch (17) is provided with between 3rd gear (19) and elastic deformation sleeve pipe (25), this first free-wheel clutch (17) comprises power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and the 3rd gear (19) are fixed, and power-transfer clutch inner ring and elastic deformation sleeve pipe (25) end winding support.
4. electric bicycle motor according to claim 2, it is characterized in that: linked together by the second unidirectional backup bearing (19) between described second gear (13) and the first gear (10), this second free-wheel clutch (9) comprises power-transfer clutch inner ring and the clutch outer with this power-transfer clutch inner ring one-way locking, wherein clutch outer and described first gear (10) are fixed, and power-transfer clutch inner ring and the second gear (13) are fixed.
5. electric bicycle motor according to claim 2, it is characterized in that: described casing is made up of chassis body (6) and the shell end cover (1) be fixedly connected on this chassis body (6) and waterproof plastic lid (14), described chassis body forms a gear cavity in (6), gear cavity is connected with detouchable gear cap (8), described first gear (10) and the second gear (13) are arranged in this gear containing cavity.
6. electric bicycle motor according to claim 5, it is characterized in that: between described second gear (13) and gear cap (8), be provided with the 4th backup bearing (8), between the second gear (13) and chassis body (6), be provided with the 5th backup bearing (11).
7. electric bicycle motor according to claim 5, it is characterized in that: described chassis body (6) is connected with detouchable controller mounting box (12), described electric machine controller is arranged in this controller mounting box (12).
8. electric bicycle motor according to claim 1, it is characterized in that: described elastic deformation sleeve pipe (25) comprises resilient deformation section (2501) and be integrally formed at this resilient deformation section (2501) left, the left canned paragraph (2502) at right two ends and right canned paragraph (2503), described resilient deformation section (2501) has at least one H-type groove (25011), described H-type groove (25011) has the deep-slotted chip breaker (25011a) that two circumferences extend and the axial groove (25011b) be communicated between two deep-slotted chip breakers (25011a), the circumferential lengths of described deep-slotted chip breaker (25011a) is less than the periphery length of resilient deformation section (2501), two groups of described magnet rings (26) are separately positioned on a left side, right canned paragraph (2502, 2503) near the position of resilient deformation section (2501).
9. electric bicycle motor according to claim 8, it is characterized in that: described left canned paragraph (2502) is provided with kidney-shaped spacing hole (25021), described axis (29) radially offers a pin-and-hole (2901), and in this pin-and-hole (2901), being fixedly equipped with a locating dowel pin (23) stretched in kidney-shaped spacing hole (25021), described locating dowel pin (23) can move in kidney-shaped spacing hole (25021) inner circumferential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233956.6A CN105292370B (en) | 2014-05-29 | 2014-05-29 | Electric bicycle motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410233956.6A CN105292370B (en) | 2014-05-29 | 2014-05-29 | Electric bicycle motor |
Publications (2)
| Publication Number | Publication Date |
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| CN105292370A true CN105292370A (en) | 2016-02-03 |
| CN105292370B CN105292370B (en) | 2018-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410233956.6A Active CN105292370B (en) | 2014-05-29 | 2014-05-29 | Electric bicycle motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN105292370B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047698A1 (en) * | 2017-09-07 | 2019-03-14 | 广州市展辉电子有限公司 | Electric bicycle, and spliced sleeve and bicycle frame thereof |
| WO2021129066A1 (en) * | 2019-12-28 | 2021-07-01 | 苏州万佳电器有限公司 | Central drive device and bicycle having said device |
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| CN204021176U (en) * | 2014-05-29 | 2014-12-17 | 苏州雄风电机有限公司 | Electric bicycle motor |
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2014
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| JP2002331985A (en) * | 2001-05-31 | 2002-11-19 | Ind Technol Res Inst | Bicycle torque detection and large gear miniaturization device |
| US20030074985A1 (en) * | 2001-10-22 | 2003-04-24 | Gordon Liao | Sensor of the pedaling force of a power-assisting bike |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019047698A1 (en) * | 2017-09-07 | 2019-03-14 | 广州市展辉电子有限公司 | Electric bicycle, and spliced sleeve and bicycle frame thereof |
| WO2021129066A1 (en) * | 2019-12-28 | 2021-07-01 | 苏州万佳电器有限公司 | Central drive device and bicycle having said device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105292370B (en) | 2018-01-23 |
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