CN110595655B - Electric bicycle torque detection device and electric bicycle - Google Patents
Electric bicycle torque detection device and electric bicycle Download PDFInfo
- Publication number
- CN110595655B CN110595655B CN201911007510.0A CN201911007510A CN110595655B CN 110595655 B CN110595655 B CN 110595655B CN 201911007510 A CN201911007510 A CN 201911007510A CN 110595655 B CN110595655 B CN 110595655B
- Authority
- CN
- China
- Prior art keywords
- strain
- shaft sleeve
- pcb
- electric bicycle
- detection device
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 93
- 239000000758 substrate Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000005452 bending Methods 0.000 abstract description 11
- XOMKZKJEJBZBJJ-UHFFFAOYSA-N 1,2-dichloro-3-phenylbenzene Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1Cl XOMKZKJEJBZBJJ-UHFFFAOYSA-N 0.000 description 25
- 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 13
- 230000005540 biological transmission Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/225—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to foot actuated controls, e.g. brake pedals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to the technical field of electric power assisted vehicles, in particular to an electric power assisted vehicle torque detection device and an electric power assisted vehicle. The invention provides an electric power-assisted vehicle torque detection device which comprises a central shaft, a shaft sleeve and strain detection elements, wherein the shaft sleeve is sleeved on the central shaft, the central shaft can drive the shaft sleeve to rotate, and the two strain detection elements are symmetrically arranged on two sides of the shaft sleeve. According to the electric power-assisted vehicle torque detection device, the two strain detection elements are symmetrically arranged on the two sides of the shaft sleeve, so that the influence of the bending moment of the central shaft on the detection result of the strain detection elements can be reduced, and the measurement accuracy is improved. The electric power assisted vehicle provided by the invention can adjust the electric power assisted magnitude in real time according to the riding intention of a rider by applying the electric power assisted vehicle torque detection device.
Description
Technical Field
The invention relates to the technical field of electric power assisted vehicles, in particular to an electric power assisted vehicle torque detection device and an electric power assisted vehicle.
Background
The electric bicycle can sense the pedaling force of a rider in real time through a sensor technology, judge according to the magnitude of manpower, understand the riding intention of the rider and provide corresponding power support according to different proportion modes. The pedal force is measured by a main component moment sensor and a non-moment sensor. The non-torque sensor has a pressure detection type and a rotation angle detection type, and the strain detection type and the rotation angle detection type are difficult to apply to electric power bicycles due to complex structures and high requirements on dimensional accuracy, and the magnetostriction effect torque sensor in the strain detection type can realize non-contact measurement, but has special materials and high cost.
At present, the torque detection device of the electric resistance vehicle comprises a center shaft and a shaft sleeve, wherein the shaft sleeve is in transmission connection with the center shaft, a strain gauge is arranged on the shaft sleeve, and the torque of the shaft sleeve is detected through the strain gauge. Due to assembly errors of the middle shaft and the shaft sleeve and the action of pedal force, the middle shaft can generate a certain bending moment, and the deformation of the middle shaft can cause the shaft sleeve to generate the bending moment, so that the detection precision of the strain gauge is affected.
Therefore, there is a need for an electric bicycle torque detecting device to solve the above problems.
Disclosure of Invention
The invention aims to provide an electric power-assisted vehicle torque detection device which solves the problems in the prior art and achieves the beneficial effect of high measurement precision.
Another object of the present invention is to provide an electric power assisted vehicle, by applying the torque detection device of the electric power assisted vehicle, the magnitude of electric power can be adjusted in real time according to the riding intention of a rider.
In order to achieve the above object, the following technical scheme is provided:
the utility model provides an electric bicycle torque detection device, includes axis, axle sleeve and strain detection element, the axle sleeve cover is established epaxial, just the axis can drive the axle sleeve rotates, two strain detection element symmetry sets up the both sides of axle sleeve.
As a preferable scheme of the electric bicycle torque detection device, two mounting surfaces are arranged on the outer wall of the shaft sleeve, and the strain detection element is fixedly arranged on the mounting surfaces; or (b)
The electric bicycle torque detection device further comprises a substrate, wherein the strain detection element is fixedly arranged on the substrate, and the substrate is fixedly arranged on the shaft sleeve; or (b)
The electric bicycle torque detection device further comprises a base plate, two mounting surfaces are arranged on the outer wall of the shaft sleeve, the strain detection element is fixedly arranged on the base plate, and the base plate is fixedly arranged on the mounting surfaces.
As a preferable mode of the electric power steering apparatus, the mounting surface is provided with an adhesive layer for fixing the substrate or the strain detecting element.
As the preferred scheme of electric bicycle torque detection device, electric bicycle torque detection device still includes wireless communication connection's first PCB board and second PCB board, first PCB board with the second PCB board all overlaps establish on the axle sleeve and with the outer wall interval setting of axle sleeve, first PCB board with the second PCB board is coaxial and along the axial interval setting of axle sleeve.
As the preferred scheme of electric bicycle torque detection device, electric bicycle torque detection device still includes the support, the support is fixed to be set up on the axle sleeve, first PCB board with one of them is fixed to be set up on the support of second PCB board, another is configured as the shell fixed connection with electric bicycle.
As the preferable scheme of the electric bicycle torque detection device, the first PCB is fixedly arranged on the bracket, and the first PCB is in communication connection with the strain detection element through an FPC board; or (b)
The second PCB is fixedly arranged on the bracket, and the second PCB is in communication connection with the strain detection element through the FPC board.
As the preferable scheme of the electric power-assisted vehicle torque detection device, the surface of the strain detection element and the connection part of the strain detection element and the FPC board are provided with protective glue.
As a preferable mode of the electric power assisted vehicle torque detecting device, the strain detecting element comprises a strain gauge and a temperature sensor, wherein the strain gauge is used for detecting the strain quantity of the shaft sleeve, and the temperature sensor is used for detecting the temperature of the strain gauge.
As the preferable scheme of electric bicycle torque detection device, electric bicycle torque detection device still includes the rotational speed detecting element that is used for detecting the axle sleeve rotational speed, rotational speed detecting element includes magnetic ring and magnetic induction formula sensor, the magnetic ring is fixed to be set up on the axle sleeve, magnetic induction formula sensor is configured as with electric bicycle's shell fixed connection.
An electric power assisted vehicle comprises the electric power assisted vehicle torque detection device.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an electric power-assisted vehicle torque detection device which comprises a central shaft, a shaft sleeve and strain detection elements, wherein the shaft sleeve is sleeved on the central shaft, the central shaft can drive the shaft sleeve to rotate, and the two strain detection elements are symmetrically arranged on two sides of the shaft sleeve. According to the electric power-assisted vehicle torque detection device, the two strain detection elements are symmetrically arranged on the two sides of the shaft sleeve, so that the influence of the bending moment of the central shaft on the detection result of the strain detection elements can be reduced, and the measurement accuracy is improved.
The electric power assisted vehicle provided by the invention can adjust the electric power assisted magnitude in real time according to the riding intention of a rider by applying the electric power assisted vehicle torque detection device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
Fig. 1 is a cross-sectional view of an electric bicycle torque detecting device provided by an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating an assembly of a sleeve and a strain sensing element without protective glue according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an assembly of a sleeve and a strain detecting element with a protective adhesive according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first PCB board and a second PCB board according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of FIG. 4;
fig. 6 is a schematic structural diagram of a bracket at a first angle according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a bracket at a second angle according to an embodiment of the present invention;
fig. 8 is an assembly schematic diagram of a shaft sleeve, a bracket and a magnetic ring according to an embodiment of the present invention;
Fig. 9 is a schematic diagram of power transmission of an electric bicycle according to an embodiment of the present invention.
Reference numerals:
100-overrunning clutch; 101-tooth disc driving teeth; 102-motor drive teeth; 200-an output shaft of a motor; 300-a drive gear set; 400-a housing;
1-a central shaft;
2-shaft sleeve; 21-a mounting surface; 22-clamping grooves;
A 3-strain detecting element;
4-a substrate;
5-a first PCB board;
6-a second PCB;
7-a bracket; 71-a first mounting frame; 711-limiting plates; 712-limit hooks; 713-limiting clamping blocks; 72-fixing frame; 721-snap-on; 722—a limit; 73-a second mount; 731-limiting hooks; 732-limit protrusions;
8-FPC board;
9-protective glue;
10-a magnetic ring;
11-Bonding line.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be further described by the following detailed description with reference to the accompanying drawings.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the present electric bicycle is conventionally put in use, are merely for convenience of describing the present invention, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only, or to distinguish between different structures or components, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-2, the embodiment provides a torque detection device of an electric bicycle, which comprises a central shaft 1, a shaft sleeve 2 and strain detection elements 3, wherein the shaft sleeve 2 is sleeved on the central shaft 1, the central shaft 1 can drive the shaft sleeve 2 to rotate, and the two strain detection elements 3 are symmetrically arranged on two sides of the shaft sleeve 2. According to the electric bicycle torque detection device provided by the embodiment, the two strain detection elements 3 are symmetrically arranged on the two sides of the shaft sleeve 2, so that the influence on the detection result of the strain detection elements 3 due to the bending moment of the center shaft 1 can be reduced, and the measurement accuracy is improved.
Specifically, because the middle shaft 1 is not only subjected to the torque action but also subjected to the bending moment, the middle shaft 1 and the shaft sleeve 2 are connected through spline transmission, the strain on the shaft sleeve 2 is possible to be the comprehensive representation of the torque strain and the bending moment strain, and by symmetrically arranging the two strain detection elements 3 on the shaft sleeve 2 and calculating the average value of the detection results of the two strain detection elements 3, the influence of the bending moment of the middle shaft 1 on the result of the strain detection elements 3 can be reduced, and the measurement accuracy is improved.
Further, two strain detecting elements 3 are provided on the upper and lower sides of the sleeve 2, respectively, to further improve the measurement accuracy. The upper and lower sides of the sleeve 2 refer to the upper and lower directions of the electric bicycle in the normal running process when the electric bicycle torque detecting device is applied to the electric bicycle. In short, the bottom bracket 1 can generate a downward bending moment under the action of a pedal force, so that the shaft sleeve 2 also generates a downward bending moment, the upper side of the shaft sleeve 2 is changed into tensile strain, the lower side of the shaft sleeve 2 is changed into compressive strain, the strain value detected by the strain detection element 3 on the upper side of the shaft sleeve 2 is higher than an actual value, the strain value detected by the strain detection element 3 on the lower side of the shaft sleeve 2 is lower than an actual value, and the influence of the strain generated by the bending moment on the strain generated by the torque can be removed by taking the average value of the detection results of the two strain detection elements 3, so that the measurement accuracy is improved.
Preferably, as shown in fig. 2, the extension line of the main sensing direction of the strain detecting element 3 is arranged at an angle of 45 ° to the axis of the sleeve 2, so that the maximum strain of the sleeve 2 can be detected by the strain detecting element 3.
Alternatively, as shown in fig. 3, two mounting surfaces 21 are provided on the outer wall of the sleeve 2, and the strain detecting element 3 is fixedly provided on the mounting surfaces 21, so that the strain detecting element 3 is conveniently and fixedly installed, and the connection strength of the strain detecting element 3 and the sleeve 2 is improved. Further, the strain detecting element 3 is fixed to the mounting surface 21 of the boss 2 by welding or gluing. The mounting surface 21 is a plane surface, which facilitates the fixation of the strain detecting element 3, and reduces the deformation of the strain detecting element 3 to improve the measurement accuracy. Further, an adhesive layer is provided on the mounting surface 21 for increasing the connection strength of the strain detecting element 3 to the mounting surface 21.
Optionally, as shown in fig. 2-3, the electric bicycle torque detecting device further includes a substrate 4, the strain detecting elements 3 are fixedly disposed on the substrate 4, and the two substrates 4 are symmetrically and fixedly disposed on the shaft sleeve 2, so that the strain detecting elements 3 are fixed on the substrate 4 first, and then the substrate 4 is fixed on the shaft sleeve 2, so that the strain detecting elements 3 are installed in a modularized manner, on one hand, the installation difficulty of the strain detecting elements 3 is reduced, on the other hand, the strain detecting elements 3 installed on the shaft sleeve 2 are ensured to be qualified, and the strain detecting elements 3 are prevented from being repeatedly detached due to the damage of the strain detecting elements 3 in the installation process.
Optionally, as shown in fig. 2-3, the electric bicycle torque detecting device further includes a base plate 4, two mounting surfaces 21 are provided on the outer wall of the sleeve 2, the strain detecting element 3 is fixedly provided on the base plate 4, and the base plate 4 is fixedly provided on the mounting surfaces 21. By providing the substrate 4 and the mounting surface 21, the difficulty in mounting the strain detecting element 3 can be reduced, and the assembly efficiency of the torque detecting device can be improved. The mounting surface 21 is a plane surface, which facilitates the fixation of the strain detecting element 3, and reduces the deformation of the strain detecting element 3 to improve the measurement accuracy. Further, an adhesive layer is provided on the mounting surface 21 for increasing the connection strength of the substrate 4 and the mounting surface 21. The scheme is the optimal scheme for installing the strain detection element 3, and the beneficial effects of the two schemes can be achieved.
Specifically, as shown in fig. 2, the relevant pins of the strain detecting element 3 and the pins of the FPC board 8 are connected by a Bonding process to achieve electrical connection of the strain detecting element 3 and the FPC board 8.
Preferably, as shown in fig. 3, a protective paste 9 is provided on the surface of the strain detecting element 3 and on the connection portion thereof with the FPC board 8. Specifically, the strain detecting element 3, the Bonding wire 11 and the end face of the FPC board 8 are coated with the protective adhesive 9 to protect the strain detecting element 3, prevent foreign matters and other objects from damaging the strain detecting element 3 and the Bonding wire 11, and ensure the communication connection quality between the strain detecting element 3 and the FPC board 8.
Preferably, as shown in fig. 4-5, the electric bicycle torque detection device further comprises a first PCB 5 and a second PCB 6 in wireless communication connection, wherein the first PCB 5 and the second PCB 6 are both sleeved on the shaft sleeve 2 and are arranged at intervals with the outer wall of the shaft sleeve 2, so that the faces of the first PCB 5 and the second PCB 6 are arranged oppositely, and the wireless communication connection between the two is facilitated.
Further, induction coils are arranged on the first PCB 5 and the second PCB 6, and wireless communication connection between the first PCB 5 and the second PCB 6 is realized through the induction coils, namely wireless transmission of signals and power is realized. Preferably, the first PCB 5 and the second PCB 6 are coaxial and arranged at intervals along the axial direction of the sleeve 2, so as to ensure that no matter how the two PCBs rotate, the relative positions of the two PCBs are not changed, so as to avoid influencing signal transmission.
Illustratively, the distance between the first PCB board 5 and the second PCB board 6 is smaller than 5mm to ensure the stability of wireless transmission between the two.
Optionally, as shown in fig. 6 to 7, the electric bicycle torque detecting device further includes a bracket 7, the bracket 7 is fixedly disposed on the shaft sleeve 2, one of the first PCB 5 and the second PCB 6 is fixedly disposed on the bracket 7, and the other is configured to be fixedly connected with the casing 400 of the electric bicycle.
In this embodiment, the first PCB 5 is fixedly disposed on the bracket 7, and the first PCB 5 is in communication connection with the strain detecting element 3 through the FPC board 8, and the second PCB 6 is fixedly connected with the housing 400 of the electric bicycle. The strain detection element 3 transmits the detection result to the first PCB 5 through the FPC board 8, and the first PCB 5 transmits the signal to the second PCB 6 through the corresponding coil. In other embodiments, the second PCB 6 may be fixedly disposed on the bracket 7, and the second PCB 6 and the strain detecting element 3 may be connected in communication through the FPC board 8, which may also achieve the above-mentioned effects.
Preferably, the first PCB 5 is fixed to the bracket 7 by means of a snap. In other embodiments, the first PCB 5 may also be adhered to the bracket 7 using double sided tape. The first PCB 5 may also be fixed to the bracket 7 in other ways, as long as it is convenient to fix the first PCB 5 to the bracket 7, which is not illustrated here.
Optionally, the support 7 is sleeved on the shaft sleeve 2 and is fixedly connected with the shaft sleeve 2. Further, the bracket 7 includes a first mounting frame 71 for fixing the first PCB 5, the first mounting frame 71 includes a limiting plate 711 and a limiting hook 712, the limiting plate 711 is annular, the limiting plate 711 extends toward the circumferential direction of the shaft sleeve 2, the limiting hook 712 is connected with the limiting plate 711 and the limiting hook 712 extends toward the axial direction of the shaft sleeve 2, the hook-shaped portion of the end portion extends toward the circumferential direction of the shaft sleeve 2, and the first PCB 5 is clamped between the hook-shaped portion and the limiting plate 711, so as to mount and fix the first PCB 5.
Preferably, the plurality of stopper hooks 712 are uniformly spaced along the circumferential direction of the stopper plate 711. Be provided with spacing fixture block 713 between two spacing colludes 712, be provided with draw-in groove 22 on the first PCB board 5, spacing fixture block 713 can block to establish in draw-in groove 22 of first PCB board 5 to restrict the circumference motion of first PCB board 5. Specifically, when the first PCB 5 is sleeved on the first mounting frame 71, two sides of the first PCB 5 are respectively abutted against the hook-shaped portions of the limiting plate 711 and the limiting hook 712, and the clamping groove 22 of the first PCB 5 is clamped with the limiting clamping block 713 of the first mounting frame 71, so as to limit the circumferential direction and the axial direction of the first PCB 5, and enable the first PCB 5 to rotate along with the shaft sleeve 2.
As shown in fig. 7 in combination with fig. 2, in order to facilitate the fixation between the support 7 and the shaft sleeve 2, a limit groove is formed on the outer wall of the shaft sleeve 2, the support 7 further comprises a fixing frame 72, a plurality of fixing frames 72 are connected with a limit plate 711 and are uniformly arranged at intervals along the circumferential direction of the limit plate 711, a clamping protrusion 721 is arranged on the fixing frame 72, and the clamping protrusion 721 can be clamped in the limit groove formed on the outer wall of the shaft sleeve 2, so as to prevent the support 7 from moving relative to the shaft sleeve 2 along the axial direction and simultaneously prevent the support 7 from rotating relative to the shaft sleeve 2. Further, the shaft sleeve 2 is a stepped shaft, the end of the fixing frame 72 is bent inwards to form a limiting part 722, and the limiting part 722 abuts against the shaft of the shaft sleeve 2, so that the bracket 7 is further prevented from moving relative to the shaft sleeve 2 along the axial direction.
The strain sensing element 3 may be, for example, a strain chip with a strain resistive wheatstone bridge integrating the piezo-stack effect. Preferably, the strain chip is a MEMS strain chip.
Furthermore, the strain chip provided by the embodiment can also be a semiconductor strain resistor based on a piezoresistive effect, the strain sensitivity of the strain chip is tens of times that of a metal strain gauge, and the sensitivity to torque detection can be greatly improved. The semiconductor strain resistor based on the piezoresistive effect has the resistance value reaching several KΩ or tens of KΩ, and the maximum resistance value of the current metal strain gauge reaches about 1KΩ, so that the semiconductor strain gauge has the advantage of very low power consumption, such as 3mW, under the same voltage, so as to conveniently realize the transmission of signals and power sources by adopting a coil induction mode.
Further, the signal processing module is integrated on the first PCB 5, and the MEMS strain chip is adopted, so that the overall power consumption can be effectively reduced, signals can be transmitted to the first PCB 5 from the strain detection element 3 on the shaft sleeve 2 in a small-size space, then transmitted to the second PCB 6, and finally the signals are transmitted to the motor main control board through a connecting wire between the second PCB 6 and the motor main control board, so that the real-time control of the motor is realized.
Preferably, the strain detecting element 3 comprises a strain gauge for detecting the amount of strain of the sleeve 2 and a temperature sensor for detecting the temperature of the strain gauge to compensate for measurement errors due to temperature variations. Specifically, the strain detection element 3 provided in this embodiment is a strain chip, in which a strain gauge with piezoresistive effect is integrated, the resistance of the strain gauge adopts a wheatstone bridge, and the technical scheme of measuring strain by using the wheatstone bridge can realize internal error compensation and internal temperature compensation of the strain gauge resistance. However, since there is a layer of glue and coating between the strain gauge chip and the sleeve 2, the linear temperature expansion coefficients cannot be uniform. Therefore, a temperature sensor is integrated in the strain chip, the temperature of the strain gauge is detected, the temperature of the protective glue 9 and the temperature of the pattern layer on the shaft sleeve 2 and the mounting surface 21 thereof are detected at the same time, and then the temperature compensation of the whole measurement error is realized by comprehensively calculating the known expansion coefficients of the glue, the coating, the material of the shaft sleeve 2 and the strain gauge.
Preferably, the electric power assisted vehicle torque detecting device further comprises a rotation speed detecting element for detecting the rotation speed of the shaft sleeve 2, wherein the rotation speed detecting element comprises a magnetic ring 10 and a magnetic induction sensor, the magnetic ring 10 is fixedly arranged on the shaft sleeve 2, and the magnetic induction sensor is configured to be fixedly connected with the shell 400 of the electric power assisted vehicle. Specifically, the change in the magnetic field generated by the magnetic ring 10 is detected by a magnetic induction sensor to detect the rotation angle of the sleeve 2, and the rotation speed of the sleeve 2 is calculated.
As shown in fig. 8 in combination with fig. 7, for example, a magnetic ring 10 is provided on the other end of the bracket 7 and is fixed relatively to the bracket 7. Specifically, the other end of the bracket 7 is provided with a plurality of second mounting frames 73, the second mounting frames 73 are arranged on the fixing frame 72, the second mounting frames 73 comprise limiting hooks 731, and the magnetic rings 10 are clamped between the limiting hooks 731 and limiting portions 722 on the fixing frame 72. Specifically, the second mounting frame 73 is U-shaped, two U-shaped arms of one second mounting frame 73 are respectively connected with one fixing frame 72, the limiting hook 731 is disposed at the bottom of the U-shape and extends outwards towards the circumference of the shaft sleeve 2, and the magnetic ring 10 is clamped between the limiting hook 731 and the limiting portion 722.
Preferably, a limiting protrusion 732 is provided on at least one second mounting frame 73 of the plurality of second mounting frames 73, a groove is provided on the magnetic ring 10, when the magnetic ring 10 is mounted, the groove on the magnetic ring 10 is aligned with the limiting protrusion 732 on the second mounting frame 73, and then the magnetic ring 10 is sleeved on the plurality of second mounting frames 73, so that the limiting protrusion 732 is blocked in the groove of the magnetic ring 10, and the magnetic ring 10 is prevented from rotating relative to the bracket 7.
In addition, the other end of the shaft sleeve 2 is a star wheel part of the overrunning clutch 100, and the overrunning clutch 100 is mainly used for isolating motor power and pedal driving force and preventing the motor from galloping or reversing to drive the middle shaft 1 to rotate so as to influence riding of a rider.
The embodiment also provides an electric bicycle, including foretell electric bicycle torque detection device, can be according to riding the intention of person of riding, the size of electric power assisted is adjusted in real time.
As shown in fig. 9, for convenience of understanding, the driving principle of the electric power assisted vehicle provided in this embodiment is as follows: manual driving: the rider transmits power to the middle shaft 1 through the pedal crank of the electric power-assisted bicycle, the middle shaft 1 is connected with the shaft sleeve 2 through a spline, the power is transmitted to the shaft sleeve 2, the shaft sleeve 2 transmits the power to the tooth disc transmission teeth 101 on the overrunning clutch 100, the tooth disc transmission teeth 101 transmit the power to the tooth disc, and then the rear wheel of the electric power-assisted bicycle is driven to rotate through a chain, so that the manual running of the electric power-assisted bicycle is realized. Electric driving: the motor output shaft 200 is in transmission connection with the motor transmission teeth 102 through the transmission gear set 300, the motor transmission teeth 102 and the tooth disc transmission teeth 101 are arranged on the same hollow shaft, namely, the motor output shaft 200 transmits power to the tooth disc transmission teeth 101, the tooth disc transmission teeth 101 transmit the power to the tooth disc, and then the rear wheel of the electric power-assisted vehicle is driven by a chain to rotate, so that the electric power-assisted running of the electric power-assisted vehicle is realized.
When the rider wants to accelerate, the acting force of the rider on the pedal crank is usually increased, so that the torque borne by the center shaft 1 is increased, the torque of the shaft sleeve 2 is further increased, then the torque variation of the shaft sleeve 2 is detected through the electric power assisted vehicle torque detection device provided by the embodiment, and the signal is transmitted to the motor, so that the motor can adjust the electric power assistance in real time according to the riding intention of the rider.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. The torque detection device of the electric bicycle comprises a central shaft (1), a shaft sleeve (2) and strain detection elements (3), wherein the shaft sleeve (2) is sleeved on the central shaft (1), and the central shaft (1) can drive the shaft sleeve (2) to rotate, and the torque detection device is characterized in that the two strain detection elements (3) are symmetrically arranged on two sides of the shaft sleeve (2);
The electric bicycle torque detection device further comprises a first PCB (5) and a second PCB (6) which are in wireless communication connection, wherein the first PCB (5) and the second PCB (6) are sleeved on the shaft sleeve (2) and are arranged at intervals with the outer wall of the shaft sleeve (2), and the first PCB (5) and the second PCB (6) are coaxial and are arranged at intervals along the axial direction of the shaft sleeve (2);
The electric bicycle torque detection device further comprises a support (7), the support (7) is fixedly arranged on the shaft sleeve (2), the first PCB (5) is fixedly arranged on the support (7), the first PCB (5) is in communication connection with the strain detection element (3) through the FPC board (8), the second PCB (6) is configured to be in communication connection with the shell (400) of the electric bicycle, and the second PCB (6) is used for being in communication connection with the motor main control board.
2. The electric bicycle torque detection device according to claim 1, characterized in that two mounting surfaces (21) are provided on the outer wall of the sleeve (2), and the strain detection element (3) is fixedly provided on the mounting surfaces (21); or (b)
The electric bicycle torque detection device further comprises a substrate (4), wherein the strain detection element (3) is fixedly arranged on the substrate (4), and the substrate (4) is fixedly arranged on the shaft sleeve (2); or (b)
The electric bicycle torque detection device further comprises a base plate (4), two mounting surfaces (21) are arranged on the outer wall of the shaft sleeve (2), the strain detection element (3) is fixedly arranged on the base plate (4), and the base plate (4) is fixedly arranged on the mounting surfaces (21).
3. The electric power steering torque detection apparatus according to claim 2, wherein an adhesive layer is provided on the mounting surface (21) to fix the substrate (4) or the strain detection element (3).
4. The electric bicycle torque detecting device according to claim 1, characterized in that a protective glue (9) is provided on the surface of the strain detecting element (3) and on the connection part with the FPC board (8).
5. An electric bicycle torque sensing device according to any one of claims 1-4, characterized in that the strain sensing element (3) comprises a strain gauge for sensing the amount of strain of the bushing (2) and a temperature sensor for sensing the temperature of the strain gauge.
6. The electric vehicle torque detection device according to any one of claims 1-4, further comprising a rotational speed detection element for detecting a rotational speed of the shaft sleeve (2), the rotational speed detection element comprising a magnetic ring (10) and a magnetic induction sensor, the magnetic ring (10) being fixedly arranged on the shaft sleeve (2), the magnetic induction sensor being configured for a fixed connection with a housing (400) of the electric vehicle.
7. An electric power assisted vehicle comprising an electric power assisted vehicle torque detecting apparatus according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911007510.0A CN110595655B (en) | 2019-10-22 | 2019-10-22 | Electric bicycle torque detection device and electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911007510.0A CN110595655B (en) | 2019-10-22 | 2019-10-22 | Electric bicycle torque detection device and electric bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110595655A CN110595655A (en) | 2019-12-20 |
| CN110595655B true CN110595655B (en) | 2024-10-18 |
Family
ID=68851640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911007510.0A Active CN110595655B (en) | 2019-10-22 | 2019-10-22 | Electric bicycle torque detection device and electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110595655B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928771A (en) * | 2020-08-06 | 2020-11-13 | 广东高标电子科技有限公司 | Strain detection device and strain detection method |
| IT202100017615A1 (en) * | 2021-07-02 | 2023-01-02 | Easting Electronics Societa’ A Responsabilita’ Limitata | DEVICE FOR THE MEASUREMENT OF TORQUES AND RELATED INSTALLATION PROCEDURE |
| CN113624376A (en) * | 2021-07-27 | 2021-11-09 | 霍丁格必凯(苏州)电子测量技术有限公司 | Electric tool digital torque sensor and electric tool |
| CN114235243A (en) * | 2021-12-31 | 2022-03-25 | 国太阳科技有限公司 | Torque sensor in automobile electric power steering system |
| CN115242032B (en) * | 2022-06-30 | 2024-03-15 | 广东高标智能科技股份有限公司 | Electric connection system of centrally-mounted motor and electric power-assisted bicycle |
| TWI829485B (en) * | 2022-12-23 | 2024-01-11 | 賴士豪 | Torque sensing device for electric assisted bicycle |
| DE102023107118A1 (en) * | 2023-03-21 | 2024-09-26 | Brose Antriebstechnik GmbH & Co. Kommanditgesellschaft, Berlin | Drive unit for an electric bicycle with a sensor device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776579A (en) * | 2014-02-19 | 2014-05-07 | 长安大学 | Device and method for testing amount of looseness of connecting pretightening force of after-fire high-strength bolt |
| CN209305765U (en) * | 2018-12-24 | 2019-08-27 | 广东高标电子科技有限公司 | A kind of torque detection transmission device and electric booster system |
| CN210400671U (en) * | 2019-10-22 | 2020-04-24 | 广东高标电子科技有限公司 | Electric bicycle torque detection device and electric bicycle |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW476720B (en) * | 1999-06-04 | 2002-02-21 | Sunstar Engineering Inc | Power assisted bicycle |
| EP2478527B1 (en) * | 2009-09-18 | 2018-12-05 | Prysmian S.p.A. | Electric cable with bending sensor and monitoring system and method for detecting bending in at least one electric cable |
| JP2014122796A (en) * | 2012-12-20 | 2014-07-03 | Panasonic Corp | Torque detector |
| JP2015152384A (en) * | 2014-02-13 | 2015-08-24 | パナソニックＩｐマネジメント株式会社 | Torque sensor and torque detector using torque sensor |
| CN104931175A (en) * | 2014-06-17 | 2015-09-23 | 舟山市正源标准件有限公司 | Method for measuring bolt axial fastening force through bolt axial strain |
| JP6360428B2 (en) * | 2014-11-17 | 2018-07-18 | 株式会社Ｓｏｋｅｎ | Torque sensor |
| CN205506273U (en) * | 2016-04-06 | 2016-08-24 | 宜昌精联电子科技有限公司 | Torque sensor |
| CN205861101U (en) * | 2016-06-06 | 2017-01-04 | 宁波柯力传感科技股份有限公司 | A kind of compound sensor measuring axial force and moment of torsion |
| CN206114179U (en) * | 2016-10-31 | 2017-04-19 | 西安建筑科技大学 | Measure device that high strength bolt connects vice torque coefficient |
| CN109421883B (en) * | 2017-08-31 | 2021-10-26 | 雅迪科技集团有限公司 | Control method of moped |
| CN208155491U (en) * | 2018-03-26 | 2018-11-27 | 宁波柯力传感科技股份有限公司 | A kind of split type strain torque sensor |
| CN108609103A (en) * | 2018-05-07 | 2018-10-02 | 重庆三叶花科技有限公司 | Axle of electric boosting vehicle torque measuring method |
| CN109305281B (en) * | 2018-09-06 | 2024-05-31 | 苏州盛亿电机有限公司 | High-precision detection device for double-side pedal force of middle shaft of electric bicycle |
| CN109572914A (en) * | 2018-12-26 | 2019-04-05 | 重庆理工大学 | A kind of cantilever axis electric bicycle moment sensor |
| CN109506815B (en) * | 2018-12-26 | 2020-12-01 | 重庆理工大学 | A suspension type electric bicycle torque sensor |
-
2019
- 2019-10-22 CN CN201911007510.0A patent/CN110595655B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776579A (en) * | 2014-02-19 | 2014-05-07 | 长安大学 | Device and method for testing amount of looseness of connecting pretightening force of after-fire high-strength bolt |
| CN209305765U (en) * | 2018-12-24 | 2019-08-27 | 广东高标电子科技有限公司 | A kind of torque detection transmission device and electric booster system |
| CN210400671U (en) * | 2019-10-22 | 2020-04-24 | 广东高标电子科技有限公司 | Electric bicycle torque detection device and electric bicycle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110595655A (en) | 2019-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110595655B (en) | Electric bicycle torque detection device and electric bicycle | |
| US8797027B2 (en) | Bottom bracket with a torque sensor unit | |
| CN103620372B (en) | Rotary torsion testing machine | |
| JP5563714B2 (en) | Torque measuring device and vehicle steering device including the same | |
| WO2015161545A1 (en) | Electric bicycle central axle torque speed sense device | |
| CN106627964A (en) | Torque sensor and detecting system for electric bicycle | |
| CN109305281B (en) | High-precision detection device for double-side pedal force of middle shaft of electric bicycle | |
| CN101881674A (en) | Bicycle bottom bracket force sensor | |
| CN210400671U (en) | Electric bicycle torque detection device and electric bicycle | |
| JP7546460B2 (en) | Torque and angle sensors | |
| JP2019513995A (en) | Torque detection device and vehicle | |
| JP2019535590A (en) | Torque sensing device and electric assist bicycle using the torque sensing device | |
| CN206218128U (en) | For the torque sensor and detecting system of electric bicycle | |
| JP2012132920A (en) | Angle sensor | |
| CN113418637B (en) | Torsion sensor for electric power-assisted vehicle | |
| US8960021B2 (en) | Non-contact type torque and angle of rotation sensing device and measurement method using same | |
| CN104369832A (en) | Conductive sliding ring used for electric bicycle and assisting power control method for electric bicycle provided with conductive sliding ring | |
| WO2021063019A1 (en) | Torque sensor for power-assisted bicycle, and power-assisted bicycle | |
| NL2030660B1 (en) | Electric Auxiliary Drive for a Bicycle | |
| WO2018205713A1 (en) | Electric bicycle torque sensing-type motor and electric bicycle | |
| JP5670857B2 (en) | Rotational angular velocity sensor | |
| JPH07229802A (en) | High rigidity torque converter | |
| CN114858325A (en) | A miniature torque measuring device and measuring method | |
| JP2001330525A (en) | Torque amount converter | |
| JPH102816A (en) | Vehicle output measuring 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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 3 Gongye West Road, Songshan Lake Park, Dongguan City, Guangdong Province, 523000 Applicant after: Guangdong Gaobiao Intelligent Technology Co.,Ltd. Address before: No.3, Gongye West Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Applicant before: SHENZHEN GOBAO ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |