CN103674386A - Novel torque sensor of electric bike - Google Patents
Novel torque sensor of electric bike Download PDFInfo
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- CN103674386A CN103674386A CN201310618663.5A CN201310618663A CN103674386A CN 103674386 A CN103674386 A CN 103674386A CN 201310618663 A CN201310618663 A CN 201310618663A CN 103674386 A CN103674386 A CN 103674386A
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- strain gauge
- torque sensor
- electric vehicle
- gauge transducer
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Abstract
The invention provides a novel torque sensor of an electric bike. A movable plate is arranged between a crankshaft and a gear, the crankshaft is connected with the movable plate and capable of driving the same to rotate, the movable plate is connected with the gear through a strain sensor, and a signal line of the strain sensor is connected with a commutator. When the crankshaft of the novel torque sensor of the electric bike is stressed, the movable plate transmits torque to the gear through the strain sensor so as to drive the gear to rotate. The novel torque sensor of the electric bike can convert the torque transmitted to the gear into electric signals directly and then send the electric signals to an MCU (micro controller unit) of the overall bike for controlling, can reflect the condition of the torque in real time, reduce data calculation of the MCU, improve processing speed of the MCU, prevent signal interference and improve control precision of output signals, and further can prevent the situation of 'rushing' so as to guarantee running safety of the electric bike effectively.
Description
Technical field
The present invention relates to electric bicycle field, particularly relate to a kind of torque sensor structure for detection of electric bicycle pedal power size.
Background technology
Electric motor car has become a kind of conventional vehicles in people's daily life, and the developing direction of electric motor car is mainly to miniaturization, intelligentized future development.In use, the size of output power of motor is mainly to judge according to pedal force size to light-duty riding type bicycle.The sensor of induction pedal force size generally can be set on electric bicycle, by the stressed size of sensor sensing electric bicycle, if pedal force is less, the power output of motor also can be corresponding less, as larger in pedal force, the power output of motor also can be corresponding larger.
LEV is in the market all to measure the suffered pedal force size of electric motor car with Hall-type moment sensor, on electric motor car toothed disc, spring is set, the length stretching by Hall element measuring spring, and then the size of definite pedal force moment.There is following defect in the moment size that adopts this sensor to detect electric motor car pedal force: 1) spring deformation amount is large, and pin steps down on pedal partially soft, easily occurs the problem of chain releasing; 2) signal of sensor measurement is not direct moment signal, but by after spring deformation relatively the phase difference calculating of 2 sine wave signals of 2 Hall sensors outputs draw, moment signal is that indirect calculation draws, so calculated amount is large, makes controller for electric vehicle reaction velocity slow; 3) magnetic material corresponding with Hall element is easily subject to extraneous factor interference, so reliability is poor; 4) adopt this sensor construction can not judge whether foot-operated fluted disc rotates, particularly vehicle is in traffic light, people's custom is placed on a pin on pedal, at this moment spring will be elongated, Hall element will sense the stressed motor output torque that makes, in the situation that not braking, electric motor car is easy to produce " driving ", therefore exists serious potential safety hazard.
Summary of the invention
The shortcoming of prior art, the object of the present invention is to provide a kind of signal to process novel electric vehicle torque sensor simple, that sound construction is reliable, signal is difficult for being disturbed in view of the above.
For achieving the above object and other relevant objects, the invention provides a kind of novel electric vehicle torque sensor, comprise the fluted disc that connects chain and the bent axle that is connected pedal, between described bent axle and described fluted disc, be also provided with a movable disk, described bent axle is connected with described movable disk, described bent axle can drive described movable disk rotation, and described movable disk is connected by strain gauge transducer with described fluted disc, and the signal wire of described strain gauge transducer is connected with a commutator.
Preferably, described commutator comprises closure casing, described closure casing comprises a upper cover and a lower cover, described upper cover can rotate relatively with described lower cover, described upper cover is coaxially fixedly connected with described fluted disc, on described, cover and be provided with a PCB signal-processing board for the treatment of strain gauge transducer feedback signal, in described closure casing, be also provided with a commutation slip ring, described commutation slip ring is connected with described upper cover, described upper cover drives described commutation slip ring synchronous rotary, under described, cover and be provided with the brush contacting with described commutation slip ring, the signal wire of described strain gauge transducer is electrically connected to described PCB signal-processing board, the lead-in wire of described brush stretches out described closure casing.
Preferably, the central authorities of described lower cover are provided with a bearing bridge, and described commutation slip ring is connected with described bearing bridge by a bearing.
Preferably, the sidewall end face of described lower cover is provided with U-shaped groove, and the sidewall of described upper cover is inserted in described U-shaped groove.
Preferably, the base plate of described lower cover is provided with several magnetic beads that distribute along even circumferential, and described PCB signal-processing board is provided with Hall element.
Preferably, described strain gauge transducer is fixedly connected with described movable disk, and described fluted disc is provided with mounting hole, and described strain gauge transducer is embedded in described mounting hole.
Preferably, the strain gauge resistance bridge circuit Surface Mount of described strain gauge transducer is on resilient material.
As mentioned above, novel electric vehicle torque sensor of the present invention has following beneficial effect: this novel electric vehicle torque sensor is connected by strain gauge transducer between movable disk and fluted disc, like this when bent axle is stressed, movable disk can be directly passed to fluted disc by moment by strain gauge transducer and make its rotation, this novel electric vehicle torque sensor can directly be converted to electrical signal transfer by the moment size that passes to fluted disc and control to car load MCU, this novel electric vehicle torque sensor can reflect moment situation in real time, reduce MCU data calculated amount, improve MCU processing speed, anti-stop signal disturbs, improve the control accuracy of output signal.Adopt this novel electric vehicle torque sensor also can prevent that the situation of " driving " from occurring, effectively guarantees the traffic safety of electric motor car simultaneously.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the embodiment of the present invention.
Fig. 2 is the connection diagram of embodiment of the present invention bent axle and movable disk.
Fig. 3 is the structural representation of embodiment of the present invention disk.
Fig. 4 is the connection diagram of embodiment of the present invention bent axle and fluted disc.
Fig. 5 is the decomposing schematic representation of embodiment of the present invention commutator.
Element numbers explanation
1 bent axle
2 movable disk
3 fluted discs
31 mounting holes
4 strain gauge transducers
5 commutators
51 upper covers
The sidewall of 511 upper covers
52 lower covers
The sidewall of 521 lower covers
53 commutation slip rings
54 PCB signal-processing boards
55 bearings
56 brushes
57 magnetic beads
58 bearing bridge
6 lead-in wires
Embodiment
By particular specific embodiment explanation embodiments of the present invention, person skilled in the art scholar can understand other advantages of the present invention and effect easily by the disclosed content of this instructions below.
Refer to Fig. 1 to Fig. 5.Notice, appended graphic the illustrated structure of this instructions, ratio, size etc., equal contents in order to coordinate instructions to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the present invention, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under the effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this instructions, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under without essence change technology contents, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, 2, the invention provides a kind of novel electric vehicle torque sensor, this comprises that novel electric vehicle torque sensor comprises the bent axle 1 and the fluted disc 3 that is connected chain that connects pedal, and bent axle 1 is fixedly connected with movable disk 2, and bent axle 1 rotation can drive movable disk 2 together to rotate.Movable disk 2 coaxially be arranged in parallel with fluted disc 3, movable disk 2 is connected with fluted disc 3 by strain gauge transducer 4, when bent axle 1 drives movable disk 2 rotation, movable disk 2 can be by strain gauge transducer 4 band active toothed disk 3 rotations, and strain gauge transducer 4 just can sense the moment that bent axle 1 transmits like this.The signal wire of strain gauge transducer 4 is connected with a commutator 5, and the induced signal that strain gauge transducer 4 produces can pass to by steering gear the MCU of electric motor car, and MCU can calculate according to the induced signal of strain gauge transducer 4 feedbacks the output torque of motor.
As shown in Figure 3,4, as a preferred embodiment of the present invention, strain gauge transducer 4 is fixedly connected with movable disk 2, is provided with mounting hole 31 on fluted disc 3, and a part for strain gauge transducer 4 is embedded in mounting hole 31.Like this when movable disk 2 rotation, movable disk 2 will be by strain gauge transducer 4 band active toothed disks 3, strain gauge transducer 4 is subject to movable disk 2 just can produce electric signal with the extruding of fluted disc 3, and the size that produces electric signal according to strain gauge transducer 4 can judge the size of fluted disc 3 Moments.The strain gauge resistance bridge circuit of strain gauge transducer 4 can Surface Mount on resilient material, can solve so the poor problem of product measuring accuracy inconsistency in strain gauge transducer 4 production runes, make strain gauge transducer 4 be suitable for large-scale production.
As shown in Figure 5, commutator 5 comprises a closure casing, and this closure casing is by a upper cover 51 and a lower cover 52, and upper cover 51 can rotate relatively with lower cover 52.In use, lower cover 52 is fixing, and upper cover 51 is coaxially fixedly connected with fluted disc 3, and fluted disc 3 just can drive upper cover 51 rotations like this.On upper cover 51, be provided with one for the treatment of the PCB signal-processing board 54 of strain gauge transducer feedback signal.PCB signal-processing board 54 is fixedly connected with upper cover 51, PCB signal-processing board 54 can be with upper cover 51 rotations, therefore PCB signal-processing board 54 is relative constant with the position of strain gauge transducer 4, the signal wire of strain gauge transducer 4 is electrically connected to PCB signal-processing board 54, and PCB signal-processing board 54 is processed for the feedback signal of sensor being carried out to the signals such as filtering, amplification.
In closure casing, be also provided with a commutation slip ring 53, commutation slip ring 53 is coaxially fixedly connected with upper cover 51, upper cover 51 can drive commutation slip ring 53 synchronous rotaries, both sides at commutation slip ring 53 are respectively provided with a brush being in contact with it 56, brush 56 is fixedly connected with lower cover 52, two brushes 56 are arranged on upper cover 51 central horizontal line both sides, are conducive to like this brush 56 waterproof.Brush 56 is fixed with respect to upper cover 51 positions, and the lead-in wire 6 of brush 56 stretches out this closure casing and is connected with the MCU of electric motor car, and the signal that strain gauge transducer 4 can be produced by brush 56 like this passes to the MCU of electric motor car.Commutation slip ring 53 adopts split-type design with brush 56, can effectively solve like this problem of commutator product thickness, adopts the thickness of this structure closure casing to be less than 10mm.
In order to prevent intaking in seal casinghousing, in the plate inner surface central authorities of lower cover, be provided with a bearing bridge 58, commutation slip ring 53 is connected with bearing bridge 58 by bearing 55, and bearing bridge 58 can support the slip ring 53 that commutates.Bearing bridge 58 is positioned at the plate inner surface of lower cover, so just can prevent that extraneous moisture from entering in closure casing by bearing.End face at the sidewall 521 of lower cover is provided with U-shaped groove, and the sidewall 511 of upper cover is inserted in this U-shaped groove, and the sidewall 511 of upper cover rotates in U-shaped groove, and the sidewall 511 of upper cover coordinates with U-shaped groove slipper seal, so also can effectively prevent that moisture from entering in seal casinghousing.
The base plate of lower cover 52 is provided with several magnetic beads 57 that distribute along even circumferential, and this circumference is concentric with the center of circle of lower cover 52.PCB signal-processing board 54 is provided with Hall element, when 54 rotation of PCB signal-processing board, can collect by Hall element rate signal and the rotary angle signal of fluted disc 3 like this, this signal can judge whether fluted disc 3 rotates after electric motor car MCU processes, and then can prevent that " driving " phenomenon from producing.
This novel electric vehicle torque sensor is connected by strain gauge transducer between movable disk and fluted disc, like this when bent axle is stressed, movable disk can be directly passed to fluted disc by moment by strain gauge transducer and make its rotation, this novel electric vehicle torque sensor can directly be converted to electrical signal transfer by the moment size that passes to fluted disc and control to car load MCU, this novel electric vehicle torque sensor can reflect moment situation in real time, feedback signal real-time is good, free of discontinuities, can effectively reduce MCU data calculated amount, improve MCU processing speed, anti-stop signal disturbs, improve the control accuracy of output signal.Adopt this novel electric vehicle torque sensor also can prevent that the situation of " driving " from occurring, effectively guarantees the traffic safety of electric motor car.This also has waterproof, not fragile, good reliability, appearance looks elegant, high conformity, is suitable for the advantages such as large-scale production simultaneously, as a kind of trip mode of health, has very large practical value.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (7)
1. a novel electric vehicle torque sensor, comprise the fluted disc that connects chain and the bent axle that is connected pedal, it is characterized in that: between described bent axle and described fluted disc, be also provided with a movable disk, described bent axle is connected with described movable disk, described bent axle can drive described movable disk rotation, described movable disk is connected by strain gauge transducer with described fluted disc, and the signal wire of described strain gauge transducer is connected with a commutator.
2. novel electric vehicle torque sensor according to claim 1, it is characterized in that: described commutator comprises closure casing, described closure casing comprises a upper cover and a lower cover, described upper cover can rotate relatively with described lower cover, described upper cover is coaxially fixedly connected with described fluted disc, on described, cover and be provided with a PCB signal-processing board for the treatment of strain gauge transducer feedback signal, in described closure casing, be also provided with a commutation slip ring, described commutation slip ring is connected with described upper cover, described upper cover drives described commutation slip ring synchronous rotary, under described, cover and be provided with the brush contacting with described commutation slip ring, the signal wire of described strain gauge transducer is electrically connected to described PCB signal-processing board, the lead-in wire of described brush stretches out described closure casing.
3. novel electric vehicle torque sensor according to claim 2, is characterized in that: the central authorities of described lower cover are provided with a bearing bridge, and described commutation slip ring is connected with described bearing bridge by a bearing.
4. novel electric vehicle torque sensor according to claim 2, is characterized in that: the sidewall end face of described lower cover is provided with U-shaped groove, and the sidewall of described upper cover is inserted in described U-shaped groove.
5. novel electric vehicle torque sensor according to claim 2, is characterized in that: the base plate of described lower cover is provided with several magnetic beads that distribute along even circumferential, and described PCB signal-processing board is provided with Hall element.
6. novel electric vehicle torque sensor according to claim 1, is characterized in that: described strain gauge transducer is fixedly connected with described movable disk, and described fluted disc is provided with mounting hole, and described strain gauge transducer is embedded in described mounting hole.
7. novel electric vehicle torque sensor according to claim 1, is characterized in that: the strain gauge resistance bridge circuit Surface Mount of described strain gauge transducer is on resilient material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618663.5A CN103674386A (en) | 2013-11-28 | 2013-11-28 | Novel torque sensor of electric bike |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618663.5A CN103674386A (en) | 2013-11-28 | 2013-11-28 | Novel torque sensor of electric bike |
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| Publication Number | Publication Date |
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| CN103674386A true CN103674386A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310618663.5A Pending CN103674386A (en) | 2013-11-28 | 2013-11-28 | Novel torque sensor of electric bike |
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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 |
| CN116062083A (en) * | 2021-11-04 | 2023-05-05 | 南京懂玫驱动技术有限公司 | Power-assisted control system and method of electric power-assisted bicycle and electric power-assisted bicycle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442680A (en) * | 2002-03-06 | 2003-09-17 | 李书贤 | Improved Torque Detector |
| US20090120210A1 (en) * | 2007-11-08 | 2009-05-14 | Grand Valley State University | Bicycle torque measuring system |
| JP2012008064A (en) * | 2010-06-28 | 2012-01-12 | Panasonic Corp | Torque detector |
| CN103257011A (en) * | 2013-05-03 | 2013-08-21 | 尚林山 | Crank torque measurement device, electric bicycle and intelligent bicycle |
| CN203275001U (en) * | 2013-06-21 | 2013-11-06 | 捷奥比电动车有限公司 | Electric bicycle-used strain-type torque sensor |
-
2013
- 2013-11-28 CN CN201310618663.5A patent/CN103674386A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1442680A (en) * | 2002-03-06 | 2003-09-17 | 李书贤 | Improved Torque Detector |
| US20090120210A1 (en) * | 2007-11-08 | 2009-05-14 | Grand Valley State University | Bicycle torque measuring system |
| JP2012008064A (en) * | 2010-06-28 | 2012-01-12 | Panasonic Corp | Torque detector |
| CN103257011A (en) * | 2013-05-03 | 2013-08-21 | 尚林山 | Crank torque measurement device, electric bicycle and intelligent bicycle |
| CN203275001U (en) * | 2013-06-21 | 2013-11-06 | 捷奥比电动车有限公司 | Electric bicycle-used strain-type torque sensor |
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 |
| CN116062083A (en) * | 2021-11-04 | 2023-05-05 | 南京懂玫驱动技术有限公司 | Power-assisted control system and method of electric power-assisted bicycle and electric power-assisted bicycle |
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Application publication date: 20140326 |