CN203844937U - Torque sensing device for centre shaft of electric bicycle - Google Patents
Torque sensing device for centre shaft of electric bicycle Download PDFInfo
- Publication number
- CN203844937U CN203844937U CN201420060619.7U CN201420060619U CN203844937U CN 203844937 U CN203844937 U CN 203844937U CN 201420060619 U CN201420060619 U CN 201420060619U CN 203844937 U CN203844937 U CN 203844937U
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- sensor
- moment
- magnet steel
- torque
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Abstract
The utility model discloses a torque sensing device for a centre shaft of an electric bicycle. The torque sensing device for the centre shaft of the electric bicycle comprises the centre shaft, a chain wheel and a shaft sleeve, wherein the centre shaft penetrates in a five-way tube of the bicycle; the chain wheel sleeves the centre shaft; the shaft sleeve sleeves the centre shaft and can deform peripherally when a peripheral twisting force is applied to the shaft sleeve; one end of the shaft sleeve is fixed with the centre shaft; the other end of the shaft sleeve is fixed with the chain wheel; the shaft sleeve is provided with a torque sensing subassembly which can sense the magnitude of the peripheral twisting force applied to the shaft sleeve; a torque signal output wire of the torque sensing subassembly is connected with a motor controller of the bicycle via a wire outlet device; the wire outlet device consists of a movable sliding seat and a fixed sliding seat; the movable sliding seat and the fixed sliding seat can be in contact with each other in an adhered manner and can slide relatively; the movable sliding seat is fixed with the shaft sleeve; the fixed sliding seat is fixed with the five-way tube of the bicycle; the torque signal output wire of the torque sensing subassembly is connected with the movable sliding seat; and the fixed sliding seat is connected with the motor controller through a torque signal outgoing line. The torque sensing device for the centre shaft of the electric bicycle is simple in structure and stable in performance.
Description
Technical field
The utility model relates to a kind of electrical bicycle middle shaft moment sensor.
Background technology
In order to allow the drive motor of Electrical Bicycle adjust horsepower output according to the suffered twisting resistance size of bicycle middle shaft, on nearly all Electrical Bicycle, be all provided with axis moment sensor.The shortcoming such as existing electrical bicycle middle shaft moment sensor ubiquity complex structure, profile are huge.
The torque signals pig-tail wire of some bicycle middle shaft moment sensors is to be drawn with the electric machine controller of drive motor and be connected by current colector, and current colector adopts the frame mode of slip ring and carbon brush or other contact part dynamic Contacts, during use, between contact part or carbon brush and slip ring, can produce cliding friction.Because, for some contact, area of contact is very little between contact part and slip ring, pressure is larger, uses rear slip ring to be easy to be scratched therefore for a long time.And be difficult to guaranteeing the contact stabilization between contact part and slip ring, this has directly affected the stability of the moment sensing signal that moment sensor sends.
Utility model content
The utility model object is: for the problems referred to above, provide a kind of electrical bicycle middle shaft moment sensor of simple in structure and stable performance.
The technical solution of the utility model is: a kind of electrical bicycle middle shaft moment sensor, comprise the axis being located in bicycle five-pipe, be set in the chain wheel on this axis, and be enclosed within the axle sleeve that can produce circumferential deformation on axis and when it is subject to circumferential twisting resistance, one end of described axle sleeve is relative with axis fixing, the other end is relative with chain wheel fixing, on described axle sleeve, be provided with the moment sensing assembly that can respond to the suffered circumferential twisting resistance size of axle sleeve, the torque signals output line of described moment sensing assembly is connected with the electric machine controller of bicycle through an outgoing line device, described outgoing line device consists of contact bonded to each other and moving slide and quiet slide that can relative sliding, wherein moving slide and axle sleeve are fixed, quiet slide is relative with bicycle five-pipe fixing, the torque signals output line of described moment sensing assembly is connected with moving slide, between described quiet slide and described electric machine controller, by torque signals pig-tail wire, be connected.
As preferably, described moment sensing assembly comprises moment sensing magnet steel and the Hall torque sensor corresponding with described moment sensing magnet steel, on the tube wall of described axle sleeve, along the circumferential direction offer non-close incisions, described moment sensing magnet steel is fixed on a side of described otch, described Hall torque sensor is fixed on the opposite side of described otch, and described torque signals output line is connected on described Hall torque sensor.
As preferably, described moment sensing magnet steel is rare earth magnetic steel, and is provided with altogether two.
As preferably, the Hall element on described Hall torque sensor is arranged on Hall torque sensor near that side of described moment sensing magnet steel.
As preferably, the torque signals pig-tail wire between the torque signals output line of described moment sensing assembly and described quiet slide and electric machine controller respectively has two; Described moving slide consists of ring and moving slide outer shroud in the moving slide being connected as a single entity, described quiet slide consists of ring and quiet slide outer shroud in the quiet slide being connected as a single entity, wherein ring moving contact in ring and quiet slide in moving seat, moving slide outer shroud and the moving contact of quiet slide outer shroud; Two described torque signals output lines are connected with moving slide outer shroud with ring in described moving slide respectively, and two described torque signals pig-tail wires are connected with quiet slide outer shroud with ring in quiet slide respectively.
As preferably, also comprise velocity response magnet steel and the hall speed sensor corresponding with described velocity response magnet steel, wherein velocity response magnet steel is arranged on described moving slide, and hall speed sensor is relative with bicycle five-pipe fixing.
As preferably, described velocity response magnet steel has 20, rounded being uniformly distributed on described moving slide.
As preferably, between one end of described axle sleeve and described axis, be relatively-stationary by spline.
The utility model has the advantages that:
1, this bicycle middle shaft moment sensor of the utility model is by the stressed rear distortion that produces of axle sleeve being installed between axis and chain wheel, and then the relative position of moment sensing magnet steel and Hall torque sensor is changed, and then it is big or small to induce axis Moment, moment transmission puts in place, because be the structure of integral type, so the defect of induced signal shakiness in the time of can not existing moment weak, but can guarantee all the time high sensitivity and the high precision of induced signal.
2, the outgoing line device in this bicycle middle shaft moment sensor of the utility model adopts moving slide and the quiet slide carriage structure of contact bonded to each other, because can remaining to fit tightly in counterrotating process with quiet slide, moving slide contacts, area of contact is larger, pressure is less, so conduction is reliable, stable signal transmission, frictional loss is also little.
3, this bicycle middle shaft moment sensor of the utility model can detect moment and the speed of axis simultaneously, thereby electric machine controller can be considered after the rotating speed size and moment size of axis, controls the operational factor of motor.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is the integral structure schematic diagram that has adopted the electric bicycle motor of this bicycle middle shaft moment sensor of the utility model;
Fig. 2 is the local structure schematic diagram that has adopted the electric bicycle motor of this bicycle middle shaft moment sensor of the utility model;
Fig. 3 is the sectional structure schematic diagram of axle sleeve;
Fig. 4 is the planar structure schematic diagram of axle sleeve;
Wherein: 1-axis, 2-chain wheel, 3-axle sleeve, 301-otch, 4-moment sensing magnet steel, 5-Hall torque sensor, 6-moves slide, ring in the moving slide of 601-, 602-moves slide outer shroud, the quiet slide of 7-, ring in the moving slide of 701-, the quiet slide outer shroud of 702-, 8-bearing, 9-torque signals output line, 10-torque signals pig-tail wire, 11-casing, 12-stator, 13-rotor, 14-motor shaft tooth, 15-nylon gear, 16-miniature gears, 17-big gear wheel, 18-the first unilateral bearing, 19-the second unilateral bearing, 20-support, 21-velocity response magnet steel, 22-hall speed sensor, 23-spline, 24-motor connection pipe, 25-jam nut, 26-electric machine controller, 27-brace panel, 28-adapter plate.
The specific embodiment
In order to allow, people are more clear understands technology contents of the present utility model intuitively, and a electric bicycle motor that this axis moment sensor of the utility model is installed of usining is below specifically addressed the utility model technology contents as specific embodiment:
Fig. 1 and Fig. 2 are the structural representations that has adopted the electric bicycle motor of this bicycle middle shaft moment sensor of the utility model, this built-in motor comprises casing 11, support 20 and motor connection pipe 24, and casing 11 and support 20 are all connected as a single entity with motor connection pipe 24.Motor connection pipe 24 one end are shaped with outside thread, during assembling, motor connection pipe 24 is located in bicycle five-pipe (not shown in FIG.), and the thread end that makes motor connection pipe 24 stretches out outside Five-way tube, then on the outside thread of motor connection pipe 24, lock jam nut 25, thereby motor connection pipe 24 and bicycle five-pipe are tightly fixed together.In order to guarantee the Joint strenght between casing 11 and Five-way tube, this example is connected with a brace panel 27 between casing 11, motor connection pipe 24 and Five-way tube, these brace panel 27 one end are by screw locking on casing 11, and the other end is enclosed within on motor connection pipe 24 and by described jam nut 25 and is tightly pressed in Five-way tube end.
In described motor connection pipe 24, by bearing 8 rotations, be equipped with axis 1 (obviously this axis 1 is also located in bicycle five-pipe), on this axis 1, cover has chain wheel 2, during practical application, between this chain wheel 2 and bicycle rear chain drum, driving chain is installed.On described axis 1, also cover has an axle sleeve 3, when this axle sleeve 3 is subject to circumferential twisting resistance, can produce circumferential deformation.One end of axle sleeve 3 is relative with axis 1 fixing by spline 23, and the other end is relative with chain wheel 2 fixing.On axle sleeve 3, be provided with the moment sensing assembly that can respond to the suffered circumferential twisting resistance size of axle sleeve, the torque signals output line of described moment sensing assembly is connected with the electric machine controller of bicycle through an outgoing line device.
Described moment sensing assembly can adopt various version of the prior art, such as: the version of adhering resistance strain sheets.And moment sensing assembly in the present embodiment has adopted following version: along the circumferential direction offer non-close incisions 301 on the tube wall of described axle sleeve 3, one side of this otch 301 is fixed with moment sensing magnet steel 4, opposite side is fixed with the Hall torque sensor 5 corresponding with described moment sensing magnet steel, and the Hall element in this Hall torque sensor 5 is arranged on that side of close moment sensing magnet steel 4 on Hall torque sensor 5.Described torque signals output line 9 is connected on Hall torque sensor 5.
In this example, described moment sensing magnet steel 4 is rare earth magnetic steel, and is provided with altogether two.These two rare earth magnetic steels are arranged side by side, and polarity is contrary.
During practical application, need crank be installed at axis 1 two ends, on crank, install foot-operated.When cycling person tramps with one's feet moving pedal drive axis 1 rotation, the twisting resistance that axis 1 is subject to passes to the left end of axle sleeve 3 in Fig. 1 by spline 23, axle sleeve 3 is subject to, after twisting resistance, circumferential torsional deflection occurs, thereby the relative position between described moment sensing magnet steel 4 and Hall torque sensor 5 is changed, and then make Hall torque sensor 5 sense this torque signals and this torque signals is passed to electric machine controller 26 by outgoing line device, then after being processed by electric machine controller 26, adjust the operational factor of motor.It is larger that bicyclist steps on foot-operated strength, and the twisting resistance that axle sleeve 3 is subject to is larger, and the deflection of axle sleeve 3 is larger, and the torque signals that Hall torque sensor 5 senses is larger).
Described outgoing line device in the present embodiment has adopted a kind of structure very cleverly, it consists of moving slide 6 and quiet slide 7 contact bonded to each other and can relative sliding, wherein moving slide 6 is fixedly connected on described axle sleeve 3 ends by adapter plate 28, quiet slide 7 is fixing with described support 20, the torque signals output line of described Hall torque sensor 5 is connected with moving slide 6, between described quiet slide 7 and described electric machine controller, by torque signals pig-tail wire 10, is connected.
When axle sleeve 3 rotates, the moving slide 6 fixing with axle sleeve 3 will rotate with axle sleeve 3, quiet slide 7 is fixed on support 20 relative with cycle frame static, between moving like this slide 6 and quiet slide 7, relatively rotate and remain laminating contact, thereby the torque signals that Hall torque sensor 5 is sensed is successively through the stable electric machine controller 26 that flows to of torque signals output line 9, moving slide 6, quiet slide 7 and torque signals pig-tail wire 10.Owing to being face contact between moving slide 6 and quiet slide 7, area of contact is larger, and pressure is less, so conduction is reliable, and stable signal transmission, frictional loss is also little.
In the present embodiment, the torque signals pig-tail wire 10 between the torque signals output line 9 of described Hall torque sensor 5 and described quiet slide 7 and electric machine controller is respectively two.Accordingly, this example has been arranged to respectively following structure by described moving slide 6 and quiet slide 7: moving slide 6 by the moving slide being connected as a single entity, encircle 601 and moving slide outer shroud 602 form, described quiet slide 7 by the quiet slide being connected as a single entity, encircle 701 and quiet slide outer shroud 702 form, wherein ring 701 moving contacts in ring 601 and quiet slide in action, moving slide outer shroud 602 and quiet slide outer shroud 702 moving contacts.Two described torque signals output lines 9 respectively with in described moving slide, encircle 601 and be connected with moving slide outer shroud 602, two described torque signals pig-tail wires 10 respectively with in quiet slide, encircle 701 and be connected with quiet slide outer shroud 702.
In addition, this example is provided with velocity response magnet steel 21 on described moving slide 6, on described support 20, be provided with the hall speed sensor 22 corresponding with described velocity response magnet steel 21, the same with Hall torque sensor 5, in this hall speed sensor, be also provided with Hall element.When axis 1 drives axle sleeve 3 and moving slide 6 to rotate, described velocity response magnet steel 21 rotates thereupon, and the hall speed sensor 22 being fixed on support 20 keeps static, thereby make hall speed sensor 22 induce the rotating speed of axis 1, reach and detect the object that pin is stepped on speed signal.Because hall speed sensor 22 is fixing with support 20, and support 20 is fixed with bicycle five-pipe, velocity response magnet steel 21 natures are relative with bicycle five-pipe fixing so.
In the present embodiment, described velocity response magnet steel 21 has 20, and these 20 velocity response magnet steel 21 rounded being uniformly distributed on described moving slide 6.Every rotation one circle of moving slide 6, just can be to the impulse singla of 20 of hall speed sensor 22 outputs.
This electric bicycle motor of the present embodiment also comprise the stator 12 be located in casing 11 and rotor 13 and with the fixing motor shaft tooth 14 of rotor 13, described motor shaft tooth 14 is in transmission connection by gear reduction and described chain wheel 2.After electrical power operation, rotor 13 drive motor axle teeth 14 rotate, and motor shaft tooth 14 rotates by gear reduction band movable chain wheel 2, and then drives bicycle to move ahead.
This example adopts internal rotor outer stator structure.
Described gear reduction can adopt various version well-known to those skilled in the art, gear reduction in the present embodiment adopts double reduction structure, its detailed structure is as follows: it comprise with the intermeshing nylon gear 15 of described motor shaft tooth 14, with the coaxial miniature gears being connected 16 of nylon gear 15 and with the intermeshing big gear wheel 17 of described miniature gears 16, described big gear wheel 17 is fixing with chain wheel 2.Motor shaft tooth 14 and nylon gear 15 form the first order and slow down, and the two adopts helical teeth transmission; Form the second stage with the coaxial miniature gears being connected 16 of nylon gear 15 with the big gear wheel 17 being connected with chain wheel 2 and slow down, the two adopts straight-tooth transmission.This product is by two-stage gear reduction, directly drives endless chain transmission for bicycle after the rotating speed of 3600-4500rpm is dropped to 100-125rpm." little " in the said miniature gears of the utility model and big gear wheel and " greatly " are comparatively speaking.
Axis 1 not transfer when guaranteeing that rotor 13 drives chain wheels 2 to rotate, this example has been installed the first unilateral bearing 18 between axle sleeve 3 and big gear wheel 17, this first unilateral bearing 18 comprise bearing inner ring and with the outside race of this bearing inner ring one-way locking, wherein outside race and described big gear wheel 17 are fixing, and bearing inner ring and axle sleeve 3 ends are fixed.Visible, chain wheel 2 is not to be directly connected on axis 1, and makes to be connected with axis 1 by big gear wheel 17, the first unilateral bearing 18 and axle sleeve 3.When electrical power drives rotor 13 to rotate, the inner ring of the first unilateral bearing 18 and outer ring, in released state, can relatively rotate, and axle sleeve 3 and axis 1 just can not follow pedal to rotate.And when manpower is ridden, as long as riding speed surpasses electrically operated speed (when pure manpower is ridden, electric drive speed is zero), the state (one-way locking) that the Internal and external cycle of the first unilateral bearing 1 will be in closing, equally can be as ordinary bicycle normal riding.
Resistance while riding for alleviating manpower, this example is also provided with the second unilateral bearing 19 between described miniature gears 16 and nylon gear 15, described the second unilateral bearing 19 comprise bearing inner ring and with the outside race of this bearing inner ring one-way locking, wherein outside race and described nylon gear 15 are fixing, and bearing inner ring and miniature gears 16 are fixing.When manpower is ridden, chain wheel 2 can rotate with miniature gears 16 by big gear wheel, and at this moment the Internal and external cycle of the second unilateral bearing 19 is in released state, can not drive nylon gear 15 and rotor 13 to rotate, thereby it is lighter to guarantee to ride; And when electrical power moves, as long as electrically operated speed surpasses the speed that manpower is ridden, the second unilateral bearing 19 will be in the state closing, thereby guarantee that electrical drive power can pass to chain wheel 2.And this example is also provided with the ball bearing of main shaft coaxially arranged with the second unilateral bearing 19 (in figure mark) between miniature gears 16 and nylon gear 15, thereby be that the second unilateral bearing 19 is shared a part of diametral load.
Certainly, above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow people can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations of doing according to the Spirit Essence of the utility model main technical schemes or modification, within all should being encompassed in protection domain of the present utility model.
Claims (8)
1. an electrical bicycle middle shaft moment sensor, comprise the axis (1) being located in bicycle five-pipe, be set in the chain wheel (2) on this axis (1), and be enclosed within on axis (1) and when it is subject to circumferential twisting resistance, can produce the axle sleeve (3) of circumferential deformation, one end of described axle sleeve (3) is relative fixing with axis (1), the other end is relative fixing with chain wheel (2), on described axle sleeve (3), be provided with the moment sensing assembly that can respond to the suffered circumferential twisting resistance size of axle sleeve, the torque signals output line (9) of described moment sensing assembly is connected with the electric machine controller (26) of bicycle through an outgoing line device, it is characterized in that: described outgoing line device consists of contact bonded to each other and moving slide (6) and quiet slide (7) that can relative sliding, wherein moving slide (6) is fixing with axle sleeve (3), quiet slide (7) is relative with bicycle five-pipe fixing, the torque signals output line (9) of described moment sensing assembly is connected with moving slide (6), between described quiet slide (7) and described electric machine controller (26), by torque signals pig-tail wire (10), be connected.
2. electrical bicycle middle shaft moment sensor according to claim 1, it is characterized in that: described moment sensing assembly comprises moment sensing magnet steel (4) and the Hall torque sensor (5) corresponding with described moment sensing magnet steel (4), on the tube wall of described axle sleeve (3), along the circumferential direction offer non-close incisions (301), described moment sensing magnet steel (4) is fixed on a side of described otch (301), described Hall torque sensor (5) is fixed on the opposite side of described otch (301), described torque signals output line (9) is connected on described Hall torque sensor (5).
3. electrical bicycle middle shaft moment sensor according to claim 2, is characterized in that: described moment sensing magnet steel (4) is rare earth magnetic steel, and is provided with altogether two.
4. electrical bicycle middle shaft moment sensor according to claim 2, is characterized in that: the Hall element on described Hall torque sensor (5) is arranged on Hall torque sensor (5) near that side of described moment sensing magnet steel (4).
5. according to the electrical bicycle middle shaft moment sensor described in claim 1 or 2 or 3 or 4, it is characterized in that: the torque signals output line (9) of described moment sensing assembly and the torque signals pig-tail wire (10) between described quiet slide (7) and electric machine controller respectively have two; Described moving slide (6) consists of ring (601) and moving slide outer shroud (602) in the moving slide being connected as a single entity, described quiet slide (7) consists of ring (701) and quiet slide outer shroud (702) in the quiet slide being connected as a single entity, wherein ring (701) moving contact in ring (601) and quiet slide in moving seat, moving slide outer shroud (602) and quiet slide outer shroud (702) moving contact; Described two torque signals output lines (9) are connected with moving slide outer shroud (602) with ring (601) in described moving slide respectively, and described two torque signals pig-tail wires (10) are connected with quiet slide outer shroud (702) with ring (701) in quiet slide respectively.
6. according to the electrical bicycle middle shaft moment sensor described in claim 1 or 2 or 3 or 4, it is characterized in that: also comprise velocity response magnet steel (21) and the hall speed sensor (22) corresponding with described velocity response magnet steel (21), wherein velocity response magnet steel (21) is arranged on described moving slide (6) above, and hall speed sensor (22) is relative with bicycle five-pipe fixing.
7. electrical bicycle middle shaft moment sensor according to claim 6, is characterized in that: described velocity response magnet steel (21) has 20, upper rounded being uniformly distributed of described moving slide (6).
8. according to the electrical bicycle middle shaft moment sensor described in claim 1 or 2 or 3 or 4, it is characterized in that: between one end of described axle sleeve (3) and described axis (1), be relatively-stationary by spline (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060619.7U CN203844937U (en) | 2014-02-11 | 2014-02-11 | Torque sensing device for centre shaft of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420060619.7U CN203844937U (en) | 2014-02-11 | 2014-02-11 | Torque sensing device for centre shaft of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203844937U true CN203844937U (en) | 2014-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420060619.7U Withdrawn - After Issue CN203844937U (en) | 2014-02-11 | 2014-02-11 | Torque sensing device for centre shaft of electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203844937U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879506A (en) * | 2014-02-11 | 2014-06-25 | 苏州工业园区同盛车业有限公司 | Center shaft torque sensing device of electric bicycle |
| CN104260818A (en) * | 2014-09-25 | 2015-01-07 | 苏州工业园区同盛车业有限公司 | Middle-mounted motor of electric bicycle and moment sensing device |
| CN104843133A (en) * | 2014-12-29 | 2015-08-19 | 新安乃达驱动技术(上海)有限公司 | Electric power-assisted bicycle torque sensing system and electric power-assisted bicycle |
-
2014
- 2014-02-11 CN CN201420060619.7U patent/CN203844937U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103879506A (en) * | 2014-02-11 | 2014-06-25 | 苏州工业园区同盛车业有限公司 | Center shaft torque sensing device of electric bicycle |
| WO2015120644A1 (en) * | 2014-02-11 | 2015-08-20 | 苏州工业园区同盛车业有限公司 | Central shaft torque sensing device of electric bicycle |
| CN104260818A (en) * | 2014-09-25 | 2015-01-07 | 苏州工业园区同盛车业有限公司 | Middle-mounted motor of electric bicycle and moment sensing device |
| WO2016045181A1 (en) * | 2014-09-25 | 2016-03-31 | 苏州工业园区同盛车业有限公司 | Middle-mounted motor of an electric bicycle and moment sensing device thereof |
| JP2017522232A (en) * | 2014-09-25 | 2017-08-10 | シュゾー インダストリアル パーク トンシャン バイシクル カンパニー リミテッド | Electric bicycle central motor and its torque detection device |
| EP3199439A4 (en) * | 2014-09-25 | 2018-07-04 | Suzhou Industrial Park Tongsheng Bicycle Co., Ltd. | Middle-mounted motor of an electric bicycle and moment sensing device thereof |
| CN104843133A (en) * | 2014-12-29 | 2015-08-19 | 新安乃达驱动技术(上海)有限公司 | Electric power-assisted bicycle torque sensing system and electric power-assisted bicycle |
| CN104843133B (en) * | 2014-12-29 | 2017-10-20 | 新安乃达驱动技术（上海）股份有限公司 | A kind of electric assisted bicycle moment sensing system and electric assisted bicycle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140924 Effective date of abandoning: 20160120 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |