CN203511966U - Foot power sensing mechanism of electric assistance bicycle - Google Patents
Foot power sensing mechanism of electric assistance bicycle Download PDFInfo
- Publication number
- CN203511966U CN203511966U CN201320553846.9U CN201320553846U CN203511966U CN 203511966 U CN203511966 U CN 203511966U CN 201320553846 U CN201320553846 U CN 201320553846U CN 203511966 U CN203511966 U CN 203511966U
- Authority
- CN
- China
- Prior art keywords
- crank shaft
- internal ring
- sensing mechanism
- housing
- ring portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A foot power sensing mechanism of an electric assistance bicycle comprises a crankshaft, a middle motor and a strain gauge, wherein the middle motor is arranged on the crankshaft and used for providing an assistance source, and the strain gauge is attached to a shell of the middle motor. In addition, the strain sensing direction of the strain gauge is in parallel with the axial direction of the crankshaft, the strain gauge is used for sensing strain produced by the shell when foot power is exerted, and therefore the foot power of a rider is calculated through strain capacity sensed by the strain gauge.
Description
Technical field
The utility model is relevant with electric booster bicycle, espespecially a kind of stepping force sensing mechanism of electric booster bicycle.
Background technology
Traditional electric booster bicycle portion can arrange a stepping force sensing mechanism with sensing rider's pedal force, and the assist rate pattern that simultaneously system of cooperation own sets is again big or small to determine the power that motor will supply, and allows the rider can be more laborsaving when driving.
Yet, current design is mainly that stepping force sensing mechanism is installed on to pedal, drives fluted disc or hind axle, except installing difficult problem installing all to need to have with coordinating of other accessories, with regard to the rotating speed that wherein drives fluted disc with regard to sensing, drive fluted disc still can be rotated further when rider does not apply any legpower, so run into burst accident and stop trample action once rider, the power-assisted that motor is exported can not stop immediately, relatively easily cause danger.Therefore, known technology still needs to be improved part.
Utility model content
Main purpose of the present utility model is, a kind of stepping force sensing mechanism of electric booster bicycle is provided, and it is easy for installation, and can increase and drive safety and promote sensing accuracy.
In order to reach above-mentioned purpose, the stepping force sensing mechanism of a kind of electric booster bicycle of the present utility model, is characterized in that, includes:
One crank shaft;
One mid-motor, is located at this crank shaft and has a housing and and be located at the power-assisted output unit in this housing; And
At least one strain sensor, is attached at the housing of this mid-motor and has the straining and sensing direction being axially parallel to each other with this crank shaft.
Wherein one end of this housing has an internal ring portion, an outer portion, an and bearings portion, this internal ring portion is surrounded on this crank shaft around coaxially, this outer portion is surrounded on this internal ring portion around coaxially, and this bearings portion is from one end of this internal ring portion extending axially along this crank shaft; This strain sensor is attached at this internal ring portion towards a side of this crank shaft.
Wherein the number of this strain sensor is two, and this two strain sensor is centered by this crank shaft and be up and down and be symmetrical arranged.
The beneficial effects of the utility model are, it is easy for installation, and can increase and drive safety and promote sensing accuracy.
Accompanying drawing explanation
For further illustrating technology contents of the present utility model, below in conjunction with embodiment and accompanying drawing, be described in detail as follows, wherein:
Fig. 1 is cutaway view of the present utility model.
Fig. 2 is end elevation of the present utility model.
Fig. 3 is diagram of block of the present utility model.
The specific embodiment
Refer to Fig. 1 and Fig. 2, stepping force sensing mechanism 10 of the present utility model includes the mid-motor 30 of a crank shaft 20,, and two strain sensors 40.
The two ends of crank shaft 20 connect respectively a crank 12, and one end of each crank 12 connects a pedal 14 again, and the legpower that makes crank shaft 20 be subject to rider at two pedals 14 is done the used time can synchronize with two cranks 12 rotation.
Mid-motor 30 is located at crank shaft 20 and is had a housing 32, one end of housing 32 has an internal ring portion 322, an outer portion 324, an and bearings portion 326, internal ring portion 322 is surrounded on crank shaft 20 around coaxially, outer portion 324 is surrounded on internal ring portion 322 around coaxially, from one end of internal ring portion 322, the axial A along crank shaft 20 extends toward in bearings portion 326, in order to support a bearing 22 that is sheathed on crank shaft 20.In addition, mid-motor 30 also has the power-assisted output unit 34 of being located in housing 32, power-assisted output unit 34 is electrically connected control modules 50 (as shown in Figure 3), makes control that power-assisted output unit 34 can controlled module 50 and to crank shaft 20 output power-assisteds or stop exporting power-assisted.Yet at this, to it should be added that, due to mid-motor 30 actuating unit that quite oneself knows in a technical field and the emphasis of non-this case for this reason, in order saving space, in this appearance, to repeat no more thin portion structure and the start principle of power-assisted output unit 34.
Two strain sensors 40 are attached at the internal ring portion 322 of housing 32 towards a side (that is inner peripheral surface of internal ring portion 322) of crank shaft 20 and centered by crank shaft 20 and be and be symmetrical arranged up and down, in addition, the straining and sensing direction of each strain sensor 40 is parallel to the axial A of crank shaft 20.Yet at this, it should be added that, as long as the number of strain sensor 40, at least one, be take two certainly as optimal selection.
From the above, when rider starts to trample two pedals 14, suffered legpower FL, the FR of left and right two pedals 14 can produce a directed force F 1, F2 to bearing 22 respectively, this directed force F 1, F2 can cause distortion slightly to the internal ring portion 322 of housing 32 again, thus, each strain sensor 40 immediately sensing housing 32 dependent variable and transmit sensing signal to control module 50 simultaneously, make control module 50 calculate the size of legpower FL, FR.
In sum, stepping force sensing mechanism 10 of the present utility model is installed on housing 32 by strain sensor 40, compared to prior art, do not need to there is characteristic easy for installation with coordinating of other accessories installing, the mounting means of adding strain sensor 40 can sense the strain of housing 32 more exactly, for control module 50, extrapolate a left side, right legpower FL, the size of FR, make the control module 50 can be according to legpower FL, the size of FR and control 34 pairs of crank shafts of power-assisted output unit 20 output power-assisteds of mid-motor 30 or stop exporting power-assisted, to increase the safety driving.
Claims (3)
1. a stepping force sensing mechanism for electric booster bicycle, is characterized in that, includes:
One crank shaft;
One mid-motor, is located at this crank shaft and has a housing and and be located at the power-assisted output unit in this housing; And
At least one strain sensor, is attached at the housing of this mid-motor and has the straining and sensing direction being axially parallel to each other with this crank shaft.
2. the stepping force sensing mechanism of electric booster bicycle as claimed in claim 1, it is characterized in that, wherein one end of this housing has an internal ring portion, an outer portion, an and bearings portion, this internal ring portion is surrounded on this crank shaft around coaxially, this outer portion is surrounded on this internal ring portion around coaxially, and this bearings portion is from one end of this internal ring portion extending axially along this crank shaft; This strain sensor is attached at this internal ring portion towards a side of this crank shaft.
3. the stepping force sensing mechanism of electric booster bicycle as claimed in claim 1 or 2, is characterized in that, wherein the number of this strain sensor is two, and this two strain sensor is centered by this crank shaft and be up and down and be symmetrical arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553846.9U CN203511966U (en) | 2013-09-06 | 2013-09-06 | Foot power sensing mechanism of electric assistance bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553846.9U CN203511966U (en) | 2013-09-06 | 2013-09-06 | Foot power sensing mechanism of electric assistance bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203511966U true CN203511966U (en) | 2014-04-02 |
Family
ID=50370941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320553846.9U Expired - Fee Related CN203511966U (en) | 2013-09-06 | 2013-09-06 | Foot power sensing mechanism of electric assistance bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203511966U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI785124B (en) * | 2017-10-13 | 2022-12-01 | 日商島野股份有限公司 | drive unit for bicycle |
-
2013
- 2013-09-06 CN CN201320553846.9U patent/CN203511966U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI785124B (en) * | 2017-10-13 | 2022-12-01 | 日商島野股份有限公司 | drive unit for bicycle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102712346B (en) | With the bicycle of electric drive | |
| CN105966541B (en) | Middle motor for bicycle | |
| CN104554223B (en) | A kind of electric booster braking device for vehicle | |
| CN103085932A (en) | Electric bicycle center shaft force moment sensing device | |
| CN202491901U (en) | Assisting power control mechanism for electric bicycle | |
| CN204895747U (en) | Put motor in electronic vehicle using motor and torque testing device thereof | |
| TWM472666U (en) | Treading force detection mechanism of electricity assisting bicycle | |
| CN103043173B (en) | Torsion sensing device of scooter | |
| CN203511966U (en) | Foot power sensing mechanism of electric assistance bicycle | |
| CN205785619U (en) | Crank torque measuring device and electric bicycle and intelligent bicycle | |
| CN103419890A (en) | Built-in motor drive system | |
| CN104697797B (en) | A kind of electronic brake booster controlled motor demarcation test equipment | |
| CN202807025U (en) | Foot power sensing mechanism of electric bicycle | |
| CN201189940Y (en) | Pedal capable of sensing pedaling force | |
| CN103192919B (en) | Chainless power generation bicycle | |
| CN207010467U (en) | A kind of electric vehicle and bicycle built-in motor | |
| WO2020042811A1 (en) | Center-shaft type torque sensor of electrically power-assisted bicycle | |
| CN213502778U (en) | Speed change system with deformation type torsion sensing structure and moped | |
| CN211494371U (en) | Pedal force detection mechanism, drive device, hub device, and power-assisted bicycle | |
| TWM615370U (en) | Speed change system with deformation type torsion sensing structure and power-assisted bicycle | |
| CN203753120U (en) | Brake device for electric vehicle | |
| CN202264864U (en) | Torsion sensing device of moped | |
| CN211281363U (en) | Chain wheel speed increasing mechanism of electric power-assisted bicycle | |
| CN111391961A (en) | Middle shaft transmission device of electric bicycle | |
| CN105984550A (en) | Boosting system of electric bicycle and electric bicycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20190906 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |