CN113418637B - Torsion sensor for electric power-assisted vehicle - Google Patents
Torsion sensor for electric power-assisted vehicle Download PDFInfo
- Publication number
- CN113418637B CN113418637B CN202110832603.8A CN202110832603A CN113418637B CN 113418637 B CN113418637 B CN 113418637B CN 202110832603 A CN202110832603 A CN 202110832603A CN 113418637 B CN113418637 B CN 113418637B
- Authority
- CN
- China
- Prior art keywords
- torsion
- sleeve
- torsion sleeve
- magnetic
- electric power
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
- G01L1/127—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using inductive means
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Power Steering Mechanism (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
The invention relates to the technical field of electric power assisted vehicles, in particular to a torsion sensor for an electric power assisted vehicle, which comprises: the torsion sleeve can rotate along with the middle shaft, one end of the torsion sleeve is fixedly connected with the middle shaft, and the other end of the torsion sleeve is connected with the output part; the magnetic conduction element is arranged on the outer surface of the torsion sleeve, and can rotate along with the torsion sleeve and deform; the bracket component is sleeved on the torsion sleeve, a coil component and a circuit board are arranged on the bracket component, the coil component is electrically connected with the circuit board, and the coil component is positioned on the bracket component and covers the part of the magnetic conductive element; according to the invention, the magnetic flux is changed by the deformation of the magnetic conduction element along with the rotation of the torsion sleeve, the change of the torsion is detected by the detection component by detecting the change of the magnetic flux, and the detection precision is improved; in addition, the torsion change can be measured only by the deformation of the magnetic conduction element due to the stress of the central shaft, so that the static and dynamic torsion can be detected, and the working performance is more stable and reliable.
Description
Technical Field
The invention relates to the technical field of electric power assisted vehicles, in particular to a torsion sensor for an electric power assisted vehicle.
Background
The sensor is a detecting device, which can sense the measured information and convert the sensed information into electric signals or other information output in the required form according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like.
An electric bicycle, also called a booster bicycle, is a novel two-wheeled vehicle, belongs to a bicycle, takes a battery as an auxiliary power source, is provided with a motor, and is provided with a power auxiliary system, so that a novel vehicle integrating manpower riding and motor boosting can be realized. The torsion sensor is a core component for understanding the intention of a rider of the electric power assisting system of the power assisting bicycle, and the motor output power of the electric bicycle can be adjusted according to the measured torsion in the riding process due to the existence of the torsion sensor, so that the riding comfort is improved.
At present, a power-assisted bicycle increasingly adopts a central shaft to install a torsion sensor, a common structure is that a strain gauge is stuck on a central shaft or a sleeve connected with the central shaft, the torsion of trampling is sensed through the strain gauge, a voltage signal is output after signal processing, and then the output power of a motor is controlled, and the structure has the problems of insufficient detection precision, difficult installation and low stability and reliability.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a torsion sensor for an electric bicycle, which is mounted on a center shaft, comprising: the torsion sleeve can rotate along with the middle shaft, one end of the torsion sleeve is fixedly connected with the middle shaft, and the other end of the torsion sleeve is connected with the output part; the magnetic conduction element is arranged on the outer surface of the torsion sleeve, and can rotate along with the torsion sleeve and deform; the support assembly is sleeved on the torsion sleeve, a coil assembly and a circuit board are arranged on the support assembly, the coil assembly is electrically connected with the circuit board, the coil assembly is positioned on the support assembly and covers the part of the magnetic conduction element, and the support assembly is also sleeved with a magnetism isolating sleeve; a magnetic isolation gasket arranged on the bracket assembly in a region between the coil assembly and the circuit board; the speed magnetic ring is fixedly arranged on the middle shaft, and the induction element is arranged on the circuit board.
Further, the magnetically permeable element is sleeve-like and is attached to an outer surface of the torsion sleeve.
Further, an isolation layer is further arranged between the torsion sleeve and the magnetic conduction element.
Further, a plurality of perforations are formed on the outer surface of the magnetic conductive element.
Further, the perforations are distributed symmetrically in two groups.
Further, the perforations are obliquely arranged on the outer surface of the magnetic conduction element, and the included angle between the two groups of perforations in the length direction is 75-105 degrees.
Further, the support cover is sleeved on the center shaft and can rotate relative to the center shaft, and one end of the support assembly is fixedly connected with the support cover.
The invention has the following advantages: according to the torsion sensor, the magnetic conduction element deforms along with the rotation of the torsion sleeve, so that the magnetic flux is changed, the detecting component detects the change of the magnetic flux, so that the change of torsion is detected, and the detecting precision is improved; in addition, the torsion change can be measured only by the deformation of the magnetic conduction element due to the stress of the central shaft, so that the static and dynamic torsion can be detected, and the working performance is more stable and reliable.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an assembled schematic view of a magnetic flux torsion sensor according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a magnetic flux type torsion sensor according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a magnetic flux torsion sensor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a magnetic conductive element according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, a torsion sensor for an electric bicycle is shown, the torsion sensor is mounted on a bottom bracket 100, and includes a torsion sleeve 200 with one end fixed on the bottom bracket 100, a magnetic conductive element 201 is disposed on the torsion sleeve 200, the magnetic conductive element 201 may be sleeved, adhered or embedded on an outer surface of the torsion sleeve 200, and the magnetic conductive element 201 may rotate with the torsion sleeve 200 and deform, specifically, the bottom bracket 100 is directly or indirectly connected with a pedal, one end of the torsion sleeve 200 is connected with the bottom bracket 100 through a spline and rotates with the bottom bracket 100, and the other end of the torsion sleeve 200 is connected with an output part 300, it should be noted that in this embodiment, the output part 300 may be a shaft part or a tooth part, and the torsion sleeve 200 and the output part 300 may be connected through a unidirectional device 301, the unidirectional device 301 may be a pawl or a unidirectional clutch, and the unidirectional clutch may adopt a structure commonly used in industry, which is not described in this technical scheme; the torsion sleeve 200 is sleeved with a bracket assembly 202, the bracket assembly 202 is provided with a coil assembly 203 and a circuit board 204, the coil assembly 203 is electrically connected with the circuit board 204, and the coil assembly 203 is arranged on the bracket assembly 202 to cover the magnetic conductive element 201, namely, the coil assembly 203 can sense the magnetic flux change caused by the deformation of the magnetic conductive element 201 and form an electric signal to be transmitted to the circuit board 204, the circuit board 204 receives the electric signal, and the change of torsion is measured after the electric signal is processed and converted, so that the detection precision of the torsion sensor is improved; the magnetic isolation sleeve 207 is further disposed on the support assembly 202, so as to avoid magnetic field scattering and influence the circuit board 204, and further, the magnetic isolation gasket 208 is disposed on the support assembly 202 in a region between the coil assembly 203 and the circuit board 204, and the coil assembly 203 and/or the magnetic conduction element 201 in this embodiment are disposed in a region formed by enclosing the magnetic isolation sleeve 207 and the magnetic isolation gasket 208, so that an internal magnetic field and an external magnetic field of the coil assembly 203 are isolated, and detection stability and reliability of the torsion sensor are ensured; the torque sensor further comprises a speed magnetic ring 209 and an induction element for inducing the speed magnetic ring 209, wherein the speed magnetic ring 209 is fixedly arranged on the center shaft 100 and rotates along with the center shaft 100, the induction element is arranged on one surface of the circuit board 204, which is close to the speed magnetic ring 209, and can be a Hall IC, and the rotation rate or the pedaling frequency of the center shaft 100 can be accurately measured through the cooperation of the induction element and the speed magnetic ring 209.
In some embodiments, referring to fig. 4, the magnetic conductive element 201 is in a sleeve sheet shape and is attached to the outer surface of the torsion sleeve 200, when the middle shaft 100 drives the output part 300 to rotate, the torsion sleeve 200 transmits torsion force, so that the torsion sleeve 200 generates tiny deformation, the magnetic conductive element 201 also rotates and deforms along with the torsion sleeve 200, so that the magnetic flux changes, the magnetic flux changes are induced by the coil assembly 203, and torsion changes are obtained after the change is processed by the circuit board 204.
In some embodiments, referring to fig. 3, an isolation layer is further disposed between the torsion sleeve 200 and the magnetic conductive element 201, and specifically, the isolation layer may be copper plated on the outer surface of the torsion sleeve 200, for the purpose of isolating residual magnetism generated after the torsion sleeve 200 is subjected to alternating torque, so as to ensure that the magnetic flux variation generated by the magnetic conductive element 201 is not affected by the torsion sleeve 200 or the outside.
In some embodiments, referring to fig. 4, a plurality of through holes 206 are formed on the outer surface of the magnetic conductive element 201, and the through holes 206 may be circular, rectangular, oval or kidney-shaped, further, the through holes 206 have two groups and are symmetrically distributed on the outer surface of the magnetic conductive element 201, the two groups of through holes 206 are obliquely arranged and form a certain included angle, and the included angle of the two groups of through holes 206 in the length direction is 75 ° to 105 °, so as to enhance the deformation of the magnetic conductive element 201 along with the deformation of the torsion sleeve 200 to generate a larger magnetic flux change, and further improve the accuracy of the torsion sensor.
In some embodiments, referring to fig. 1 and 3, the torsion sensor further includes a support cover 400, where the support cover 400 is sleeved on the bottom bracket 100 and can rotate relative to the bottom bracket 100, one end of the support assembly 202 is fixedly connected with the support cover 400, specifically, the support cover 400 can be connected to the bottom bracket 100 through a bearing 211, and one end of the support assembly 202 can be fixed on the support cover 400 through a threaded connection, so that the support assembly 202, the coil assembly 203 and the circuit board 204 can be designed and assembled as an entire component, and then the entire component is sleeved on the torsion sleeve 200 through the support cover 400, thereby facilitating the overall disassembly and maintenance.
It should be noted that, the magnetic conductive element 201 in all the embodiments described above may be made of a material with high magnetic permeability, such as iron or iron alloy.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (5)
1. A torsion sensor for an electric power assisted vehicle mounted on a central shaft (100), characterized by comprising:
the torsion sleeve (200) can rotate along with the middle shaft (100), one end of the torsion sleeve is fixedly connected with the middle shaft (100), and the other end of the torsion sleeve is connected with the output part (300);
the magnetic conduction element (201) is arranged on the outer surface of the torsion sleeve (200), and the magnetic conduction element (201) can rotate along with the torsion sleeve (200) and deform;
the support assembly (202) is sleeved on the torsion sleeve (200), a coil assembly (203) and a circuit board (204) are arranged on the support assembly (202), the coil assembly (203) is electrically connected with the circuit board (204), the coil assembly (203) is positioned on the support assembly (202) and covers the part of the magnetic conduction element (201), and the support assembly (202) is also sleeved with a magnetism isolating sleeve (207);
a magnetism isolating gasket (208) arranged on the bracket assembly (202) and positioned in a region between the coil assembly (203) and the circuit board (204), wherein the coil assembly (203) and/or the magnetic conducting element (201) are/is positioned in a region formed by encircling the magnetism isolating sleeve (207) and the magnetism isolating gasket (208); the speed magnetic ring (209) is fixedly arranged on the middle shaft (100), and the induction element is arranged on the circuit board (204);
-said magnetically permeable element (201) is sleeve-like and is attached to the outer surface of said torsion sleeve (200); an isolating layer is also arranged between the torsion sleeve (200) and the magnetic conduction element (201).
2. A torsion sensor for electric power assisted vehicles according to claim 1, characterized in that the outer surface of the magnetically conductive element (201) is formed with a number of perforations (206).
3. A torsion sensor for electric power assisted vehicles according to claim 2, characterized in that the perforations (206) are of two groups, the perforations (206) of two groups being symmetrically distributed.
4. A torsion sensor for electric power assisted vehicles according to claim 3, characterized in that the perforations (206) are arranged obliquely on the outer surface of the magnetically conductive element (201) and that the angle between two groups of perforations (206) in their length direction is 75 ° to 105 °.
5. The torsion sensor for an electric bicycle of claim 1, further comprising a support cover (400), wherein the support cover (400) is sleeved on the center shaft (100) and can rotate relative to the center shaft (100), and one end of the bracket assembly (202) is fixedly connected with the support cover (400).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832603.8A CN113418637B (en) | 2021-07-22 | 2021-07-22 | Torsion sensor for electric power-assisted vehicle |
| TW110133616A TWI788001B (en) | 2021-07-22 | 2021-09-09 | A torque sensor for electric bicycle |
| PCT/CN2021/127906 WO2023000539A1 (en) | 2021-07-22 | 2021-11-01 | Torsion sensor for moped scooter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832603.8A CN113418637B (en) | 2021-07-22 | 2021-07-22 | Torsion sensor for electric power-assisted vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418637A CN113418637A (en) | 2021-09-21 |
| CN113418637B true CN113418637B (en) | 2023-05-12 |
Family
ID=77718074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110832603.8A Active CN113418637B (en) | 2021-07-22 | 2021-07-22 | Torsion sensor for electric power-assisted vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN113418637B (en) |
| TW (1) | TWI788001B (en) |
| WO (1) | WO2023000539A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418637B (en) * | 2021-07-22 | 2023-05-12 | 珠海市钧兴机电有限公司 | Torsion sensor for electric power-assisted vehicle |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203111433U (en) * | 2013-02-01 | 2013-08-07 | 苏州盛亿电机有限公司 | Center shaft torsion sensing device of power-driven bicycle |
| CN203111431U (en) * | 2013-02-04 | 2013-08-07 | 苏州盛亿电机有限公司 | Mid-mounted motor device of electric bicycle |
| US9808244B2 (en) * | 2013-03-14 | 2017-11-07 | Ethicon Llc | Sensor arrangements for absolute positioning system for surgical instruments |
| JP6047451B2 (en) * | 2013-06-27 | 2016-12-21 | ブリヂストンサイクル株式会社 | Torque sensor positioning structure and electric assist bicycle equipped with the same |
| CN105711727B (en) * | 2016-04-19 | 2018-07-03 | 钟德斌 | A kind of bicycle power-assisted system using axis torque sensor |
| CN108163128A (en) * | 2018-02-27 | 2018-06-15 | 宋文平 | A kind of bilateral chain wheel axle torsion sensor of moped based on counter magnetostriction effect |
| CN208630790U (en) * | 2018-07-02 | 2019-03-22 | 常州野人电子科技有限公司 | A kind of power system of electric automobile, torque-measuring apparatus |
| CN209356099U (en) * | 2018-12-18 | 2019-09-06 | 昆山攀登电子科技有限公司 | A kind of bilateral speed of torque sensing device of electric bicycle |
| CN209541960U (en) * | 2019-05-10 | 2019-10-25 | 深圳市奥酷曼智能技术有限公司 | Torsion formula axis double-side torque sensor and Moped Scooter |
| CN210618364U (en) * | 2019-09-02 | 2020-05-26 | 苏州哈工拓普传感控制技术有限公司 | Built-in electric power-assisted bicycle torque sensor with built-in motor |
| CN111693192A (en) * | 2020-07-17 | 2020-09-22 | 珠海市钧兴机电有限公司 | Magnetic flux type torsion sensor |
| CN112644632A (en) * | 2021-02-25 | 2021-04-13 | 宁波巨隆机械股份有限公司 | Bilateral linear torque middle shaft sensor for electric power-assisted bicycle |
| CN113418637B (en) * | 2021-07-22 | 2023-05-12 | 珠海市钧兴机电有限公司 | Torsion sensor for electric power-assisted vehicle |
-
2021
- 2021-07-22 CN CN202110832603.8A patent/CN113418637B/en active Active
- 2021-09-09 TW TW110133616A patent/TWI788001B/en active
- 2021-11-01 WO PCT/CN2021/127906 patent/WO2023000539A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW202305335A (en) | 2023-02-01 |
| TWI788001B (en) | 2022-12-21 |
| CN113418637A (en) | 2021-09-21 |
| WO2023000539A1 (en) | 2023-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202225989U (en) | Electric bicycle middle shaft with power assisting sensor device | |
| WO2015161545A1 (en) | Electric bicycle central axle torque speed sense device | |
| CN104276251A (en) | Torque sensing system for middle shaft of electric vehicle | |
| CN111693192A (en) | Magnetic flux type torsion sensor | |
| ITMI20070669A1 (en) | INSTRUMENTED BICYCLE COMPONENT AND DETECTION UNIT TO INSTRUMENT THIS COMPONENT | |
| CN113418637B (en) | Torsion sensor for electric power-assisted vehicle | |
| CN204110305U (en) | A kind of battery-driven car axis moment sensing system | |
| WO2020147370A1 (en) | Freehub torque and speed sensing device | |
| CN105849519A (en) | Torque angle sensor | |
| CN110595655A (en) | Electric bicycle torque detection device and electric bicycle | |
| NL2030660B1 (en) | Electric Auxiliary Drive for a Bicycle | |
| CN210400671U (en) | Electric bicycle torque detection device and electric bicycle | |
| CN210653525U (en) | Power-assisted bicycle torque sensor and power-assisted bicycle | |
| CN106644224B (en) | Magnetic suspension bearing dynamic torque sensor | |
| CN105333982B (en) | A kind of vertical non-contact electromagnetic induced torque sensor for automobile EPS | |
| CN103935457B (en) | A kind of integral type of battery-driven car measures middle axle device | |
| CN201828366U (en) | Non-contact torque measurement device | |
| WO2018205713A1 (en) | Electric bicycle torque sensing-type motor and electric bicycle | |
| CN108163128A (en) | A kind of bilateral chain wheel axle torsion sensor of moped based on counter magnetostriction effect | |
| CN105318998A (en) | Novel torque sensor for electric vehicle | |
| WO2014110933A1 (en) | Wheel hub motor with power-assisted sensing and power-off functions | |
| US20230348008A1 (en) | Cycle driving device having a torque sensor | |
| CN210310744U (en) | Bicycle center shaft torque detection device | |
| CN206790301U (en) | A kind of electric car torque inductively measures formula motor | |
| CN209321167U (en) | A kind of axis torque sensor device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |