CN204473050U - The moment of Electrical Bicycle and speed sensor - Google Patents
The moment of Electrical Bicycle and speed sensor Download PDFInfo
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- CN204473050U CN204473050U CN201520160656.XU CN201520160656U CN204473050U CN 204473050 U CN204473050 U CN 204473050U CN 201520160656 U CN201520160656 U CN 201520160656U CN 204473050 U CN204473050 U CN 204473050U
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Abstract
The utility model discloses a kind of moment and speed sensor of Electrical Bicycle, comprise chain wheel, crank and Deformable rack, Deformable rack by coaxially arranged outer ring and inner ring and some distribute radially and the dowel be connected between described outer ring and inner ring form, wherein inner ring and crank are fixed, and outer ring and chain wheel are fixed, the relative inner of certain adjacent two dowel is fixed with a resistance strain gage respectively, and the pin of these two resistance strain gages is all welded on a signal output board, this signal output board is fixed on Deformable rack; Also comprise the dynamic seat coaxially arranged with Deformable rack and stationary seat, dynamic seat is connected on Deformable rack, and it is fixed with vice-side winding; And stationary seat to be connected on dynamic seat and can to rotate around the axis of dynamic seat, it is fixed with former limit winding and Signal reception plate, described former and deputy limit winding forms an isolating transformer jointly, the alternating current producer that former limit winding and Signal reception plate are provided with is electrically connected, and Signal reception plate is provided with pig-tail wire, vice-side winding is then electrically connected with signal output board.This sensor construction of the utility model is simple, stable performance and susceptibility is high.
Description
Technical field
The utility model relates to Electrical Bicycle field, is specifically related to a kind of moment and speed sensor of Electrical Bicycle.
Background technology
Electrical Bicycle, due to its brisk feature such as laborsaving and pollution-free, promotes the use in countries in the world just day by day.Traditional Electrical Bicycle all carrys out speed governing with handle, and also useful speed sensor controls the so-called Intelligent electric bicycle of the horsepower output of motor, and the feature of this kind of Intelligent electric bicycle is ridden very easily in level land, but upward slope is extremely required great effort.Adopt the Electrical Bicycle of moment and speed sensor then just in time in contrast, time riding in level land, the horsepower output of motor is very little, people can be allowed to feel ride easily very power saving again, and exportable larger electric current makes climbing become very laborsaving when going up a slope, it is a kind of real Electrical Bicycle that people can be allowed to experience the natural fusion of people and machine.Although but domesticly also have moment and speed sensor now, but effect is barely satisfactory, mainly can not export normal torque signals when low speed, strength when causing starting or excessive, too small, cannot man-machine harmony be accomplished, also there is the output signal Premature saturation again of sensor when firmly riding, cause upward slope unable, working stability and the susceptibility of entirety are all poor.Although external (particularly Japan) has this series products, complex structure for a long time, manufacture difficulty and cost are all very high, and this kind of Electrical Bicycle can not be popularized very soon.
Utility model content
The utility model object is: for the problems referred to above, provides that a kind of structure is simple, stable performance and the high electric bicycle torque of susceptibility and speed sensor.
The technical solution of the utility model is: a kind of moment of Electrical Bicycle and speed sensor, comprise chain wheel, crank and Deformable rack, described Deformable rack by coaxially arranged outer ring and inner ring and some distribute radially and the dowel be connected between described outer ring and inner ring form, wherein inner ring and crank are fixed, and outer ring and chain wheel are fixed, the relative inner of certain adjacent two dowel is fixed with a resistance strain gage respectively, and the pin of these two resistance strain gages is all welded on a signal output board, described signal output board is fixed on Deformable rack; Also comprise the dynamic seat coaxially arranged with described Deformable rack and stationary seat, wherein dynamic seat is connected on Deformable rack, and it is fixed with vice-side winding; And stationary seat to be connected on dynamic seat and can to rotate around the axis of dynamic seat, it is fixed with former limit winding and Signal reception plate, described former and deputy limit winding forms an isolating transformer jointly, its limit, Central Plains winding is electrically connected with the alternating current producer that Signal reception plate is provided with, and Signal reception plate is provided with pig-tail wire, vice-side winding is then electrically connected with signal output board.
The utility model, on the basis of technique scheme, also comprises following preferred version:
Described dynamic seat is fixed with some the velocity response magnet steel circumferentially distributed, described Signal reception plate is provided with the switch Hall chip corresponding with described velocity response magnet steel.
Described velocity response magnet steel has 20.
Described vice-side winding is made up of the dynamic magnetic core of the annular arrangement be arranged on described dynamic seat and the moving winding be fixed in this dynamic magnetic core, and described former limit winding is made up of the magnetostatic core of the annular arrangement be arranged on described stationary seat and the dead line circle be fixed in this magnetostatic core; Described dynamic magnetic core contacts with magnetostatic core laminating and can relatively rotate, and together forms isolating transformer with described moving winding and dead line circle; Described dead line circle is equivalent to the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that Signal reception plate is arranged; And moving winding is equivalent to the secondary coil of isolating transformer, it is electrically connected with signal output board.
The axial cross section of described dynamic magnetic core and magnetostatic core is all in U-shaped, the two is bonded to each other and form the loop configuration that has hollow axial cross section, and described moving winding and dead line circle are housed in the loop configuration with hollow axial cross section that is made up of dynamic magnetic core and magnetostatic core.
The laminating contact surface of described dynamic magnetic core and magnetostatic core is pasted with non-drying glue.
The axis of described dynamic seat and stationary seat is fixed by the buckle that dynamic seat is arranged.
Described stationary seat is provided with and can be fixed on cycle frame, with the locating dowel pin stoping this stationary seat to do circumference rotation.
Described crank is fixed with the protective cover covered on outside described Deformable rack.
The utility model has the advantages that:
1, the moment of this Electrical Bicycle that provides of the utility model and speed sensor, it is measured people's pedal power by custom-designed Deformable rack and resistance strain gage provided thereon and puts on moment on crank, and sensitivity of measurement is high; Simultaneously the utility model isolating transformer that a kind of former and deputy winding of customized design is divided on stationary seat, dynamic seat again exports the torque signals recorded, utilize this transformer principle, solve a difficult problem for rotating signal convert to static signal dexterously, and stable signal transmission is good, substantially increase serviceability and the survey precision of the utility model entirety.
2, this electric bicycle torque that provides of the utility model and speed sensor, during specific works, dynamic seat rotates along with the rotation of chain wheel and Deformable rack, stationary seat is then because the effect of locating dowel pin can not transfer, therefore the pig-tail wire on the Signal reception plate making same stationary seat fix can keep motionless, solves by a difficult problem for the electric signal of the electric signal convert to static rotated.
3, this sensor of the utility model can detect moment and the speed of electrical bicycle middle shaft simultaneously, thus after the rotating speed size enabling electric machine controller consider axis and moment size, controls the operational factor of motor.
4, two resistance strain gages are separately fixed at the relative inner of two adjacent dowels by the utility model, when outer ring and the distortion of inner ring generation axile displacement of Deformable rack, the stress direction of these two adjacent dowel inner surfaces is just in time contrary, one is drawing stress, another is compressing stress, so the resistance variations of two resistance strain gages is also just in time contrary, the utility model connects into the structure of upper and lower semibridge system these two resistance strain gages, the variable quantity that just can obtain twice exports, the temperature drift that can well solve strain resistor itself by the largest benefit of two panels resistance strain gage, substantially increase the stability of sensor torque signals.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is one of outside drawing of this sensor of the utility model;
Fig. 2 is the outside drawing two of this sensor of the utility model;
Fig. 3 is the front section view of this sensor of the utility model;
Fig. 4 is the structural representation of Deformable rack in this sensor of the utility model;
Fig. 5 is one of perspective view of dynamic magnetic core in this sensor of the utility model;
Fig. 6 is the perspective view two of dynamic magnetic core in this sensor of the utility model;
Fig. 7 is the negative cutaway perspective view of this sensor of the utility model;
Fig. 8 is one of perspective view of dynamic seat in this sensor of the utility model;
Fig. 9 is the perspective view two of dynamic seat in this sensor of the utility model;
Wherein: 1-protective cover, 2-chain wheel, 3-crank, 4-Deformable rack, 4a-outer ring, 4b-inner chamber, 4c-dowel, 4d-moves seat mounting hole, 4e-chain wheel mounting hole, 4f-cavity, 4g-center perforation, 5-resistance strain gage, 6-signal output board, 7-moves seat, 7a-fixture block, 7b-locating piece, 7c-spring positioning seat, 8-stationary seat, 8a-locating dowel pin, 9-Signal reception plate, 10-pig-tail wire, 11-velocity response magnet steel, 12-switch Hall chip, 13-moves magnetic core, 13a-moving winding pig-tail wire, 13b-locating notch, 14-moving winding, the magnetostatic core of 15-, 16-dead line circle, 17-non-drying glue.
Detailed description of the invention
Fig. 1 ~ Fig. 9 shows the moment of this Electrical Bicycle of the utility model and a specific embodiment of speed sensor, it comprises chain wheel 2, crank 3 and Deformable rack 4, wherein Deformable rack 4 by coaxially arranged outer ring 4a and inner ring 4b and 5 distribute radially and the dowel 4c be connected between described outer ring 4a and inner ring 4b form, wherein inner ring 4b and crank 3 are fixed, and outer ring 4a and chain wheel 2 are fixed.During practical application, this sensor is arranged in the middle part of Electrical Bicycle car body, and wherein, crank 3 is fixedly connected on the end of electrical bicycle middle shaft, between the flywheel that the driving chain of bicycle is in transmission connection on described chain wheel 2 and bicycle rear.
With reference to shown in Fig. 3, Deformable rack 4 described in this example adopts metallic material to be stamped to form, inner ring 4b is with a center perforation 4g, crank 3 riveted is fixed on the perforation 4g of this center, outer ring 4a is provided with the chain wheel mounting hole 4e of 5 distributions in annular arrangement, chain wheel 2 special fastener is connected on these 5 chain wheel mounting hole 4e.
The key improvements of the present embodiment is: in above-mentioned five dowel 4c, wherein there is the relative inner of two adjacent dowel 4c to paste respectively and be fixed with a resistance strain gage 5, when outer ring 4a and the inner ring 4b generation axile displacement distortion of Deformable rack 4, the stress direction of these two adjacent dowel 4c inner surfaces is just in time contrary, one is drawing stress, another is compressing stress, so the resistance variations of two resistance strain gages 5 is also just in time contrary, this example connects into the structure of upper and lower semibridge system these two resistance strain gages 5, the variable quantity that just can obtain twice exports, the temperature drift that can well solve strain resistor itself by the largest benefit of two panels resistance strain gage, greatly improve the stability of sensor torque signals.And the pin of these two resistance strain gages 5 above-mentioned is all welded on a signal output board 6, conveniently to the layout of described signal output board 6, and reduce the profile of this sensor, in this example, this signal output board 6 is arranged in the cavity 4f between certain two adjacent dowel 4c, and is fixed on Deformable rack 4 by flexible glue.Described dynamic seat 7 is connected to (Deformable rack 4 is provided with 5 dynamic seat mounting hole 4d, dynamic seat 7 passes through 5 self-drilling connections on these 5 dynamic seat mounting hole 4d) on Deformable rack 4, and dynamic seat 7 is fixed with vice-side winding.Described stationary seat 8 to be connected on dynamic seat 7 and can to rotate around the axis of dynamic seat 7, and stationary seat 8 is fixed with former limit winding and Signal reception plate 9.Described former and deputy limit winding forms an isolating transformer jointly, and its limit, Central Plains winding is electrically connected with the alternating current producer that Signal reception plate 9 is provided with, and Signal reception plate 9 is provided with pig-tail wire 10, and vice-side winding is then electrically connected with signal output board 6.During practical application, described pig-tail wire 10 is generally connected with the electric machine controller of Electrical Bicycle.
So-called " stationary seat ", refer to that it does not rotate with crank when practical application, but keep geo-stationary with cycle frame.Realize specifically by following version: on stationary seat 8, be provided with locating dowel pin 8a, during enforcement, this locating dowel pin 8a to be set on vehicle frame in relatively-stationary hole or groove, thus serves the object stoping stationary seat 8 to rotate.
In this example, described vice-side winding is made up of the dynamic magnetic core 13 of the annular arrangement be arranged on described dynamic seat 7 and the moving winding 14 be fixed in this dynamic magnetic core 13.Described former limit winding is made up of the magnetostatic core 15 of the annular arrangement be arranged on described stationary seat 8 and the dead line circle 16 be fixed in this magnetostatic core 15.Described dynamic magnetic core 13 contacts with magnetostatic core 15 laminating and can relatively rotate, and together forms isolating transformer with described moving winding 14 and dead line circle 16.Dead line circle 16 is equivalent to the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that Signal reception plate 9 is arranged.Moving winding 14 is equivalent to the secondary coil of isolating transformer, and it is electrically connected with signal output board 6.
In the present embodiment, the axial cross section of described dynamic magnetic core 13 and magnetostatic core 15 all (has an opening surface) in U-shaped, the two is bonded to each other and form the loop configuration that has hollow axial cross section, and described moving winding 14 and dead line circle 16 are housed in the loop configuration with hollow axial cross section that is made up of dynamic magnetic core 13 and magnetostatic core 15.
Because described dynamic magnetic core 13 and magnetostatic core 15 can produce cliding friction because of relatively rotating in actual applications, in order to avoid dynamic magnetic core 13 and magnetostatic core 15 to reduce the service life of the two because of direct contact friction, this example is pasted with non-drying glue 17 on the laminating contact surface of described dynamic magnetic core 13 and magnetostatic core 15, this non-drying glue 17 has two panels, a slice is attached on dynamic magnetic core 13, another sheet is attached to magnetostatic core 15, thus dynamic magnetic core 13 is not directly contacted with magnetostatic core 15, non-drying glue 17 tool has good wearability.
Therefore, the opening surface of dynamic magnetic core 13 and magnetostatic core 15 fits together and forms a closing structure, therefore dead line circle 16 and moving winding 14 have all been in a closed magnetic circuit, an isolating transformer has been become like this with regard to equivalence, dead line circle 16 is the equal of primary transformer coil, and moving winding 14 is the equal of then secondary transformer.When practical application, the alternating current producer that Signal reception plate 9 is installed is powered to the primary coil of voltage transformer (dead line circle 16), thus make dead line circle 16 obtain a certain size alternating current, what the secondary coil (moving winding 14) due to isolating transformer connected is variable load, so the electric current of its former avris can change along with the change of secondary side variable load, the change of this electric current is undertaken processing by Signal reception plate 9 convert voltage to and export the detection namely completed axis Moment size.
Specifically, when by bike, people's pin is stepped on crank 3 and is with movable chain wheel 2 to rotate by Deformable rack 4, the same with routine techniques, described chain wheel 2 to be installed chain to drive bicycle, and chain can apply a moment of reaction by chain wheel 2 pairs of Deformable racks 4 reaches balance, because chain wheel 2 and crank 3 are separately fixed at outer ring 4a and the inner ring 4b of Deformable rack 4, therefore two rightabout moment is applied to outer ring 4a and the inner ring 4b of Deformable rack 4 respectively, the outer ring 4a of Deformable rack 4 and inner ring 4b is made to be out of shape dislocation because of stressed, dowel 4c produces distortion, there is deformation in the resistance strain gage 5 be attached on dowel 4c, and then the resistance value of these two resistance strain gages 5 is changed, also namely the load of above-mentioned isolating transformer changes.Therefore can be read the size of this load by the former limit (dead line circle) of voltage transformer, know with this moment size that moment sensing assembly senses.
Because the present embodiment is when specific works, dynamic seat rotates along with the rotation of chain wheel 2 and Deformable rack 4, stationary seat is then because locating dowel pin 18 can not transfer, therefore the pig-tail wire 10 on the Signal reception plate 9 making same stationary seat fix can keep motionless, solves by a difficult problem for the electric signal of the electric signal convert to static rotated.
In this example, concrete assembling mode between described dynamic magnetic core 13 and dynamic seat 7 is as follows: the outer peripheral edges of dynamic magnetic core 13 form locating notch 13b, dynamic seat 7 forms locating piece 7b corresponding with it, locating notch 13b matches with locating piece 7b, thus stop dynamic magnetic core 13 to do circumference rotation relative to dynamic seat 7, and dynamic seat 7 is provided with spring positioning seat 7c, and in this spring positioning seat 7c, be furnished with the spring be clipped between dynamic magnetic core 13 and dynamic seat 7, to ensure that dynamic magnetic core 13 is close together all the time with magnetostatic core 15.
In this example, described dynamic seat 7 is provided with 3 buckle 7a and fastens stationary seat 8, thus makes dynamic seat 7 and stationary seat 8 axial restraint.And crank 3 is fixed with a protective cover 1 by screw, this protective cover 1 covers Deformable rack 4, protects it.Above-mentioned dynamic seat 7 and stationary seat 8 are Plastic Parts, and signal output board 6 and Signal reception plate 9 are pcb board.
In addition, this example is also fixed with 20 the velocity response magnet steel 11 circumferentially distributed on described dynamic seat 7, is welded with two the switch Hall chips 12 corresponding with described velocity response magnet steel 11 on described Signal reception plate 9 simultaneously.During practical application, when crank handle turns bicycle middle shaft, Deformable rack 4 and dynamic seat 7 rotate, the servo-actuated seat 7 of described velocity response magnet steel 11 rotates together, and the switch Hall chip 12 on Signal reception plate 9 keeps static, thus make switch Hall chip 12 induce the rotating speed of axis and crank, reach and detect the object that pin steps on speed signal.
In order to prevent this sensor in use, above-mentioned velocity response magnet steel 11 drops, and reduce friction, this example is also pasted with non-drying glue 17 as magnet steel pad pasting on the surface of velocity response magnet steel 11 simultaneously.
Certainly, above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to people can be understood 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, all should be encompassed within protection domain of the present utility model.
Claims (9)
1. the moment of an Electrical Bicycle and speed sensor, comprise chain wheel (2), crank (3) and Deformable rack (4), described Deformable rack (4) by coaxially arranged outer ring (4a) and inner ring (4b) and some distribute radially and the dowel (4c) be connected between described outer ring (4a) and inner ring (4b) form, wherein inner ring (4b) is fixed with crank (3), and outer ring (4a) fixes with chain wheel (2)
It is characterized in that: the relative inner of certain adjacent two dowel (4c) is fixed with a resistance strain gage (5) respectively, and the pin of these two resistance strain gages (5) is all welded on a signal output board (6), described signal output board (6) is fixed on Deformable rack (4);
Also comprise the dynamic seat (7) coaxially arranged with described Deformable rack (4) and stationary seat (8), wherein dynamic seat (7) is connected on Deformable rack (4), and it is fixed with vice-side winding; And stationary seat (8) to be connected to dynamic seat (7) upper and can rotate around the axis of dynamic seat (7), it is fixed with former limit winding and Signal reception plate (9), described former and deputy limit winding forms an isolating transformer jointly, the alternating current producer that its limit, Central Plains winding and Signal reception plate (9) are provided with is electrically connected, and Signal reception plate (9) is provided with pig-tail wire (10), vice-side winding is then electrically connected with signal output board (6).
2. the moment of Electrical Bicycle according to claim 1 and speed sensor, it is characterized in that: described dynamic seat (7) is fixed with some the velocity response magnet steel (11) circumferentially distributed, described Signal reception plate (9) is provided with the switch Hall chip (12) corresponding with described velocity response magnet steel (11).
3. the moment of Electrical Bicycle according to claim 2 and speed sensor, is characterized in that: described velocity response magnet steel (11) has 20.
4. the moment of the Electrical Bicycle according to claim 1 or 2 or 3 and speed sensor, it is characterized in that: described vice-side winding is made up of the dynamic magnetic core (13) of the annular arrangement be arranged on described dynamic seat (7) and the moving winding (14) be fixed in this dynamic magnetic core (13), described former limit winding is made up of the magnetostatic core (15) of the annular arrangement be arranged on described stationary seat (8) and the dead line circle (16) be fixed in this magnetostatic core (15); Described dynamic magnetic core (13) contacts with magnetostatic core (15) laminating and can relatively rotate, and together forms isolating transformer with described moving winding (14) and dead line circle (16); Described dead line circle (16) is equivalent to the primary coil of isolating transformer, and it is electrically connected with the upper alternating current producer arranged of Signal reception plate (9); And moving winding (14) is equivalent to the secondary coil of isolating transformer, it is electrically connected with signal output board (6).
5. the electric bicycle torque according to claim 1 or 2 or 3 and speed sensor, it is characterized in that: the axial cross section of described dynamic magnetic core (13) and magnetostatic core (15) is all in U-shaped, the two is bonded to each other and form the loop configuration that has hollow axial cross section, and described moving winding (14) and dead line circle (16) are housed in the loop configuration with hollow axial cross section that is made up of dynamic magnetic core (13) and magnetostatic core (15).
6. the moment of Electrical Bicycle according to claim 5 and speed sensor, is characterized in that: on the laminating contact surface of described dynamic magnetic core (13) and magnetostatic core (15), be pasted with non-drying glue (17).
7. the moment of Electrical Bicycle according to claim 1 and speed sensor, is characterized in that: the axis of described dynamic seat (7) and stationary seat (8) is fixed by the buckle (7a) that dynamic seat is arranged.
8. the moment of Electrical Bicycle according to claim 1 and speed sensor, it is characterized in that: described stationary seat (8) is provided with and can be fixed on cycle frame, with the locating dowel pin (8a) stoping this stationary seat (8) to do circumference rotation.
9. the moment of Electrical Bicycle according to claim 1 and speed sensor, is characterized in that: described crank (3) is fixed with and covers on described Deformable rack (4) protective cover outward (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160656.XU CN204473050U (en) | 2015-03-20 | 2015-03-20 | The moment of Electrical Bicycle and speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160656.XU CN204473050U (en) | 2015-03-20 | 2015-03-20 | The moment of Electrical Bicycle and speed sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204473050U true CN204473050U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160656.XU Expired - Fee Related CN204473050U (en) | 2015-03-20 | 2015-03-20 | The moment of Electrical Bicycle and speed sensor |
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| Country | Link |
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| CN (1) | CN204473050U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743047A (en) * | 2015-03-20 | 2015-07-01 | 苏州工业园区同盛车业有限公司 | Torque and speed sensor of electric bicycle |
| CN107031784A (en) * | 2017-05-04 | 2017-08-11 | 深圳哥智行科技有限公司 | The chain wheel formula moment sensor of bicycle |
-
2015
- 2015-03-20 CN CN201520160656.XU patent/CN204473050U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743047A (en) * | 2015-03-20 | 2015-07-01 | 苏州工业园区同盛车业有限公司 | Torque and speed sensor of electric bicycle |
| CN107031784A (en) * | 2017-05-04 | 2017-08-11 | 深圳哥智行科技有限公司 | The chain wheel formula moment sensor of bicycle |
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| Date | Code | Title | Description |
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| 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: 20150715 Termination date: 20180320 |
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| CF01 | Termination of patent right due to non-payment of annual fee |