CN111071382A - Dynamic and static combined torque sensor of electric power-assisted bicycle - Google Patents
Dynamic and static combined torque sensor of electric power-assisted bicycle Download PDFInfo
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- CN111071382A CN111071382A CN202010030289.7A CN202010030289A CN111071382A CN 111071382 A CN111071382 A CN 111071382A CN 202010030289 A CN202010030289 A CN 202010030289A CN 111071382 A CN111071382 A CN 111071382A
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- torque sensor
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- assisted bicycle
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- 230000003068 static effect Effects 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 23
- 230000009471 action Effects 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- ZHBBDTRJIVXKEX-UHFFFAOYSA-N 1-chloro-2-(3-chlorophenyl)benzene Chemical compound ClC1=CC=CC(C=2C(=CC=CC=2)Cl)=C1 ZHBBDTRJIVXKEX-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a dynamic and static combined torque sensor of an electric power-assisted bicycle, which comprises an action unit, a detection unit and a processing output unit, wherein the detection unit detects the magnetic transformation on the action unit and the rotating speed and the steering direction of the action unit, the processing output unit acquires the information detected by the detection unit and converts the information into corresponding voltage signals, the voltage signals are processed and amplified for output, the output signals of the processing output unit are output through a filter cable, the outer peripheries of the detection unit and the processing output unit are sleeved with a metal sleeve, the inner periphery of the metal sleeve is provided with a groove, the groove is arranged in parallel with the axis of the metal sleeve, and a position on the filter cable corresponding to the groove is provided with a bulge. The invention aims to overcome the defects in the prior art and provide the dynamic and static combined torque sensor for the electric power-assisted bicycle, which has the advantages of good measurement precision, strong universality and stable internal signal output.
Description
Technical Field
The invention relates to the field of electric bicycles, in particular to a dynamic and static combined torque sensor of an electric power-assisted bicycle.
Background
Along with the development of social economy, the tools for riding instead of walk of people are more and more diversified, and the electric power-assisted bicycle is accepted by consumers due to the characteristics of small size, convenience, quickness, labor saving, environmental protection and the like. For the development history of the Chinese electric power-assisted bicycle, the industry generally recognizes three development stages, namely a primary stage, a first-time production scale stage and an overspeed development stage. In the super development stage, the intense competition among enterprises greatly stimulates the progress of the technology and the diffusion of new technology, and the technical level of the industry is greatly improved. The traditional electric power-assisted bicycle controls the output power of a motor by rotating a handle, and the existing electric power-assisted bicycle increasingly adopts a torque sensor to convert the pedaling force of feet of a person during riding into corresponding voltage signals for output, controls the running power of the motor after the amplified processing of a control circuit board in the motor of the electric power-assisted bicycle and greatly saves energy. However, the existing torque sensor has poor measurement accuracy, needs to customize a central shaft mounting structure and a chain wheel attached to a central shaft, and has poor universality; in addition, the circuit board inside the torque sensor is externally output through the filter cable, wherein the connection part of the filter cable and the circuit board is fragile, if the circuit board is not operated properly in the installation process, the contact between the filter cable and the circuit board is poor, and the output of internal signals is unstable.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the dynamic and static combined torque sensor for the electric power-assisted bicycle, which has the advantages of good measurement precision, strong universality and stable internal signal output.
The technical scheme for realizing the purpose of the invention is as follows: a dynamic and static combined torque sensor of an electric power-assisted bicycle comprises an action unit, a detection unit and a processing output unit; the detection unit detects the magnetic transition on the action unit and the rotating speed and the rotating direction of the action unit; the processing output unit acquires the information detected by the detection unit, converts the information into corresponding voltage signals, and outputs the voltage signals after processing and amplification; the output signal of the processing output unit is output through a filtering cable; the peripheries of the detection unit and the processing output unit are sleeved with metal sleeves; the inner periphery of the metal sleeve is provided with a groove; the groove is arranged in parallel with the axis of the metal sleeve; and a bulge is arranged at the position, corresponding to the groove, on the filter cable.
Furthermore, the side wall of the metal sleeve is provided with an opening allowing the filter cable to pass through, and the inner circumference of the end face of the metal sleeve on the side provided with the opening is provided with an inner key.
Furthermore, the action unit comprises a middle shaft, a chain wheel sleeved on the middle shaft and cranks fixed at two ends of the middle shaft.
Furthermore, the action unit also comprises a speed induction magnetic steel fixed on the periphery of the middle shaft, a strain unit and an output sleeve fixedly connected with the strain unit.
Further, the strain unit comprises a strain tube and a deformation layer arranged on the periphery of the strain tube.
Further, the deformation layer is a magnetic strain gauge, and the magnetic strain gauge is provided with U-shaped holes which are arranged along the circumferential direction of the magnetic strain gauge.
Further, the processing output unit comprises an integrated PCB board and the filter cable.
Further, the detection unit comprises a detection coil and a hall sensor; the detection coil and the Hall sensor are arranged on the retainer, the retainer is sleeved on the periphery of the strain unit, and the metal sleeve is sleeved on the periphery of the retainer.
Furthermore, the periphery of the retainer is provided with a flange, a first outer key extending leftwards along the flange and a second outer key extending rightwards along the flange.
Further, the first outer key is installed with the inner key on the inner periphery of the metal sleeve in a bonding mode.
After the technical scheme is adopted, the invention has the following positive effects:
(1) the torque sensor can detect dynamic and static torques, and has high detection accuracy, more energy conservation and higher efficiency.
(2) The convex card on the filter cable is arranged in the groove formed in the metal sleeve, and the joint of the root of the filter cable and the integrated PCB is fragile, so that the convex card on the filter cable is arranged in the groove, and the problem of poor contact between the filter cable and the integrated PCB caused by external force is not needed to be worried in the later installation or transportation process, thereby ensuring the stability of output signals.
(3) The invention adopts the filter cable, the Siemens filter cable can be selected as the filter cable, and the application of the filter cable can increase the stability of output, ensure no distortion of output signals and enhance the anti-interference performance.
(4) The retaining edge arranged on the retainer and the external key extending from the retaining edge are bonded with the internal key of the metal sleeve, so that the installation firmness of the metal sleeve is strengthened, and the metal sleeve is prevented from moving in the circumferential direction under the action of external force.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic view of the cage construction of the present invention;
FIG. 3 is a schematic structural view of a metal sleeve 00 according to the present invention;
fig. 4 is a schematic structural diagram of a filter cable according to the present invention.
The reference numbers in the drawings are as follows: the device comprises a metal sleeve 00, a groove 01, an opening 03, a key groove 04, a middle shaft 1, speed sensing magnetic steel 2, a strain unit 3, a strain tube 31, a deformation layer 32, a first rib 33, an output sleeve 4, a retainer 5, a coil groove 51, a printed board groove 52, a rib 53, a first outer key 54, a second outer key 55, an integrated PCB 6, a filter cable 7, a protrusion 71, a left bearing 81, a right bearing 82, a left bearing bowl 91, a right bearing bowl 92
Detailed Description
(example 1)
Referring to fig. 1 to 4, the present invention includes an action unit, a detection unit and a processing output unit, wherein the detection unit is used for detecting the deformation change of the action unit and the rotating speed and the rotation direction of the action unit, and the processing output unit is used for acquiring the information detected by the detection unit, converting the information into corresponding voltage signals, processing and amplifying the voltage signals, and outputting the voltage signals through a filter cable 7.
More specifically, in this embodiment, the metal sleeve 00 is sleeved on the outer peripheries of the detection unit and the processing output unit, an opening 03 allowing the filter cable 7 to pass through is formed in a side wall of the metal sleeve 00, a groove 01 is formed in the inner periphery of the metal sleeve 00, the groove 01 is arranged in parallel with the axis of the metal sleeve 00, a protrusion 71 is arranged on the filter cable 7 at a position corresponding to the groove 01, the protrusion 71 can be clamped in the groove 01, and a key groove 04 is formed in the inner periphery of the end surface of the metal sleeve 00 on the side where the opening 03 is formed.
More specifically, in this embodiment, the action unit includes a central shaft 1, a chain wheel sleeved on the central shaft, and cranks fixed at two ends of the central shaft 1, wherein the chain wheel and the cranks at two ends of the central shaft 1 are not shown in the drawing, and they are of a conventional structure, the action unit further includes a speed sensing magnetic steel 2 sleeved on the periphery of the central shaft 1, a strain unit 3, and an output sleeve 4 connected to the strain unit 3, an external key is provided at one position of the periphery of the central shaft 1, the strain unit 3 includes a strain tube 31 and a deformation layer 32 provided on the periphery of the strain tube 31, an annular accommodating groove is provided on the periphery of the strain tube 31, the deformation layer 32 is fixed in the annular accommodating groove on the periphery of the strain tube 31, the deformation layer 32 is a magnetic strain gauge, U-shaped holes are provided on the magnetic strain gauge and arranged along the circumferential direction of the magnetic strain gauge, and the U-shaped holes on the magnetic strain gauge are arranged, the inner periphery of one end of the strain tube 31 is provided with a key groove which is matched and connected with an external key on the middle shaft 1, the outer periphery of the other end of the strain tube 31 is provided with an external key which is connected with the output sleeve 4 in a bonding way, and the outer periphery of the strain tube 31 is also provided with a first flange 33. The rotation of the middle shaft 1 can simultaneously drive the speed induction magnetic steel 2, the strain unit 3 and the output sleeve 4 to rotate.
More specifically, in the embodiment, the processing output unit includes an integrated PCB 6 and an output filter cable 7 connected thereto, and the circuit design on the integrated PCB 6 can adopt the existing circuit design to process the collected magnetic transformation and the rotation speed and the rotation direction signal of the action unit, and convert the signals into corresponding voltage signals to be output to the controller, so as to control the output power of the motor.
More specifically, in this embodiment, the detecting unit includes a detecting coil and a hall sensor, wherein the detecting coil is not shown in the drawing, the detecting coil and the hall sensor are both disposed on the holder 5, the holder 5 is provided with a coil slot 51, the detecting coil is wound in the coil slot 51, the disposition position of the detecting coil corresponds to the position of the deformation layer 32 fixedly disposed on the strain unit 3, the output of the detecting coil is connected to the integrated PCB 6, the detecting coil is used for detecting the change of the deformation generated by the strain unit 3, the holder 5 is further provided with a printed board slot 52, the integrated PCB 6 is glued in the printed board slot 52, the number of the hall sensor is 2, the hall sensor is fixed on the integrated PCB 6, the disposition position of the hall sensor corresponds to the position of the speed-sensing magnetic steel 2 and is used for detecting the rotation speed and the rotation direction of the center shaft of the actuating unit, the holder 5 is provided with a flange 53, a first outer key 54 extending leftward along the flange 53, and a second The two outer keys 55, the first outer key 54 and the second outer key 55 are all arranged along the circumferential direction of the retaining sides, the first outer key 54 is installed in a bonding mode with the inner key 04 on the inner circumference of the metal sleeve 00, the retainer 5 is sleeved on the outer circumference of the strain unit 3, a gasket is arranged between the left side of the retainer 5 and the first retaining side 33 in a clamping mode, mechanical friction between the strain unit 3 and the end face of the retainer 5 in the rotating process is avoided, and the metal sleeve 00 is sleeved on the outer circumference of the retainer 5.
More specifically, in this embodiment, a left bearing 81 and a right bearing 82 are fixed to both ends of the middle shaft 1, the left bearing 81 is disposed in the left bearing bowl 91, an inner ring of the left bearing 81 is fixedly sleeved on the output sleeve 4, the right bearing 82 is disposed in the right bearing bowl 92, an inner key of the right bearing bowl 92 is bonded to the second outer key 55 on the retainer 5, the retainer 5 is connected to the right bearing bowl 92, the retainer 5 does not rotate, and an inner ring of the right bearing 82 is fixed to the middle shaft 1.
The working principle of the invention is as follows: when the device works, when a pedal is stepped by a foot, the crank is stressed to rotate, the crank rotates to drive the action unit to rotate, namely the middle shaft 1, the speed induction magnetic steel 2, the strain unit 3 and the output sleeve 4 rotate, a detection coil in the detection unit detects the deformation change of the strain unit 3, and the Hall sensor detects the rotating speed and the steering of the middle shaft by inducing the speed induction magnetic steel 2; the processing output unit collects the signals detected by the detection unit, converts the signals into corresponding voltage signals and outputs the voltage signals to the controller through the filter cable, and therefore the output power of the motor is controlled.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a torque sensor that electric bicycle dynamic and static combined which characterized in that: comprises an action unit, a detection unit and a processing output unit; the detection unit detects the change of deformation on the action unit and the rotating speed and the rotating direction of the action unit; the processing output unit acquires the information detected by the detection unit, converts the information into corresponding voltage signals, and outputs the voltage signals after processing and amplification; the output signal of the processing output unit is output through a filtering cable (7); the peripheries of the detection unit and the processing output unit are sleeved with metal sleeves (00); a groove (01) is formed in the inner periphery of the metal sleeve (00); the groove (01) is arranged in parallel with the axis of the metal sleeve (00); and a bulge (71) is arranged at the position, corresponding to the groove (01), on the filter cable (7).
2. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 1, characterized in that: an opening (03) allowing the filter cable (7) to pass through is formed in the side wall of the metal sleeve (00), and a key groove (04) is formed in the inner periphery of the end face of the metal sleeve (00) on the side provided with the opening (03).
3. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 1, characterized in that: the action unit comprises a middle shaft (1), a chain wheel sleeved on the middle shaft and cranks fixed at two ends of the middle shaft.
4. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 3, characterized in that: the action unit further comprises a speed induction magnetic steel (2) fixed on the periphery of the middle shaft (1), a strain unit (3) and an output sleeve (4) fixedly connected with the strain unit (3).
5. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 4, characterized in that: the strain unit (3) comprises a strain tube (31) and a deformation layer (32) arranged on the periphery of the strain tube (31).
6. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 5, characterized in that: the deformation layer (32) is a magnetic strain gauge, U-shaped holes are formed in the magnetic strain gauge, and the U-shaped holes are arranged along the circumferential direction of the magnetic strain gauge.
7. The dynamic and static combined torque sensor for the electric power-assisted bicycle according to any one of claims 1 to 6, wherein: the processing output unit comprises an integrated PCB (6) and the filter cable (7).
8. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 7, characterized in that: the detection unit comprises a detection coil and a Hall sensor; the detection coil and the Hall sensor are arranged on the retainer (5), the retainer (5) is sleeved on the periphery of the strain unit (3), and the metal sleeve (00) is sleeved on the periphery of the retainer (5).
9. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 8, characterized in that: the periphery of the retainer (5) is provided with a flange (53), a first outer key (54) extending leftwards along the flange (53) and a second outer key (55) extending rightwards along the flange (53).
10. The dynamic and static combined torque sensor of the electric power-assisted bicycle according to claim 9, characterized in that: the first outer key (54) is installed with a key groove (04) on the inner periphery of the metal sleeve (00) in a bonding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030289.7A CN111071382A (en) | 2020-01-13 | 2020-01-13 | Dynamic and static combined torque sensor of electric power-assisted bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030289.7A CN111071382A (en) | 2020-01-13 | 2020-01-13 | Dynamic and static combined torque sensor of electric power-assisted bicycle |
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| Publication Number | Publication Date |
|---|---|
| CN111071382A true CN111071382A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010030289.7A Pending CN111071382A (en) | 2020-01-13 | 2020-01-13 | Dynamic and static combined torque sensor of electric power-assisted bicycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572683A (en) * | 2020-12-09 | 2021-03-30 | 宁波麦思动力系统有限公司 | Bicycle torque transmission mechanism and system and electric power-assisted bicycle |
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| TWM491626U (en) * | 2014-05-28 | 2014-12-11 | Darfon Electronics Corp | Axle assembly |
| DE102014105302A1 (en) * | 2013-11-01 | 2015-05-07 | Darfon Electronics (Suzhou) Co., Ltd. | axle assembly |
| CN106627964A (en) * | 2016-11-22 | 2017-05-10 | 昆山朗德森机电科技有限公司 | Torque sensor and detecting system for electric bicycle |
| CN207889926U (en) * | 2017-10-12 | 2018-09-21 | 天津永霖科技有限公司 | A kind of axis built-in booster sensor |
| CN108791681A (en) * | 2017-05-05 | 2018-11-13 | 捷安特电动车（昆山）有限公司 | A kind of device measuring axis double-side torque, position angle, rotating speed and power |
| CN109178186A (en) * | 2018-11-06 | 2019-01-11 | 深圳市奥酷曼智能技术有限公司 | Converse magnetostriction axis torque sensor |
| CN109591946A (en) * | 2018-12-13 | 2019-04-09 | 康献兵 | Unilateral torque sensor and electric bicycle |
| CN209833891U (en) * | 2019-04-26 | 2019-12-24 | 八方电气(苏州)股份有限公司 | Center shaft mounting structure |
| CN212125426U (en) * | 2020-01-13 | 2020-12-11 | 常州拓科智能科技有限公司 | Dynamic and static combined torque sensor of electric power-assisted bicycle |
-
2020
- 2020-01-13 CN CN202010030289.7A patent/CN111071382A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014105302A1 (en) * | 2013-11-01 | 2015-05-07 | Darfon Electronics (Suzhou) Co., Ltd. | axle assembly |
| TWM491626U (en) * | 2014-05-28 | 2014-12-11 | Darfon Electronics Corp | Axle assembly |
| CN106627964A (en) * | 2016-11-22 | 2017-05-10 | 昆山朗德森机电科技有限公司 | Torque sensor and detecting system for electric bicycle |
| CN108791681A (en) * | 2017-05-05 | 2018-11-13 | 捷安特电动车（昆山）有限公司 | A kind of device measuring axis double-side torque, position angle, rotating speed and power |
| CN207889926U (en) * | 2017-10-12 | 2018-09-21 | 天津永霖科技有限公司 | A kind of axis built-in booster sensor |
| CN109178186A (en) * | 2018-11-06 | 2019-01-11 | 深圳市奥酷曼智能技术有限公司 | Converse magnetostriction axis torque sensor |
| CN109591946A (en) * | 2018-12-13 | 2019-04-09 | 康献兵 | Unilateral torque sensor and electric bicycle |
| CN209833891U (en) * | 2019-04-26 | 2019-12-24 | 八方电气(苏州)股份有限公司 | Center shaft mounting structure |
| CN212125426U (en) * | 2020-01-13 | 2020-12-11 | 常州拓科智能科技有限公司 | Dynamic and static combined torque sensor of electric power-assisted bicycle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572683A (en) * | 2020-12-09 | 2021-03-30 | 宁波麦思动力系统有限公司 | Bicycle torque transmission mechanism and system and electric power-assisted bicycle |
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