WO2022011831A1 - Magnetic flux type torsion sensor - Google Patents
Magnetic flux type torsion sensor Download PDFInfo
- Publication number
- WO2022011831A1 WO2022011831A1 PCT/CN2020/116661 CN2020116661W WO2022011831A1 WO 2022011831 A1 WO2022011831 A1 WO 2022011831A1 CN 2020116661 W CN2020116661 W CN 2020116661W WO 2022011831 A1 WO2022011831 A1 WO 2022011831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- torsion
- magnetic flux
- circuit board
- coil assembly
- Prior art date
Links
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
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
Definitions
- the invention relates to the technical field of sensors, in particular to a magnetic flux type torsion sensor.
- Sensor (English name: transducer/sensor) is a detection device that can sense the measured information, and can transform the sensed information into electrical signals or other required forms of information output according to certain rules to meet the needs of information requirements for transmission, processing, storage, display, recording and control.
- Power-assisted bicycle is a new type of two-wheeled vehicle, which belongs to a kind of bicycle. It uses a battery as an auxiliary power source, is equipped with a motor, and has a power auxiliary system, which can realize the integration of human riding and motor-assisted driving.
- the torque sensor is the core component of the electric power assist system of the power-assisted bicycle to understand the rider's intention. Due to the existence of the torque sensor, the motor output power of the electric bicycle can be adjusted according to the measured torque during the riding process, so as to improve the riding comfort. .
- the commonly used structure is to paste the strain gauge on the central axle or the casing connected to the central axle. This structure has the problems of insufficient detection accuracy, difficult installation, and low stability and reliability.
- the present invention provides a magnetic flux type torque sensor.
- the present invention adopts the following technical solutions:
- a magnetic flux type torsion sensor is installed on a central shaft, comprising: a torsion sleeve, one end of which is fixedly connected with the central shaft and rotates with the central shaft, and the other end is connected with an output part; an isolation sleeve is sleeved on the torsion sleeve one end of the barrel is fixedly connected with the torsion sleeve; a coil assembly is sleeved on the isolation sleeve; a circuit board is electrically connected with the coil assembly; wherein, the outer surface of the torsion sleeve is provided with a shield structure, the isolation sleeve is provided with a through hole matching the shielding structure, the central axis drives the torsion sleeve to rotate, and the torsion sleeve produces elastic deformation to change the distance between the through hole and the shielding structure the shaded area.
- shielding structures are arranged on the outer surface of the torsion sleeve in the circumferential direction.
- a plurality of the through holes are provided on the side wall of the isolation sleeve corresponding to the plurality of the shielding structures.
- the shielding structure is a groove or a protrusion provided on the outer surface of the torsion sleeve.
- the groove or the protrusion is waist-shaped.
- the shielding structures and the through holes are arranged alternately.
- the through holes are distributed on the side wall of the isolation sleeve in the form of mesh holes.
- a magnetic isolation sleeve is arranged between the coil assembly and the circuit board.
- the coil assembly includes a coil support and at least one set of induction coils, and the induction coils are wound on the coil support at positions corresponding to the through holes.
- a circuit board support is sleeved on the coil assembly, the circuit board is mounted on the circuit board support, and the circuit board support and the torsion sleeve are connected by a rolling bearing.
- a Hall sensor is provided on the circuit board bracket, and the Hall sensor is used to sense the rotational speed of the central shaft.
- the magnetic flux torsion sensor of the present invention adopts a structure in which a torsion sleeve, an isolation sleeve, a coil assembly and a circuit board are sequentially arranged on the central axis, and a shielding structure is arranged on the torsion sleeve, and the shielding structure is arranged on the isolation sleeve to cooperate with the shielding structure.
- the central shaft drives the output part to rotate through the torsion sleeve, and the torsion sleeve is elastically deformed to change the shielding area between the torsion sleeve and the isolation sleeve, thereby changing the The magnetic flux rate
- the coil assembly detects the change of the magnetic flux rate under the shielding area to measure the change of the torsion force, which improves the detection accuracy of the magnetic flux torsion sensor.
- the structure On the central axis, the structure is simple and easy to install, and the connection with the central axis is firm, and there is no problem of falling off, which improves the stability and reliability of the magnetic flux torsion sensor.
- FIG. 1 is an assembly schematic diagram of a magnetic flux torque sensor according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a magnetic flux torsion sensor according to an embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view of a magnetic flux torque sensor according to an embodiment of the present invention.
- the magnetic flux type torsion sensor is installed on the central shaft 100 , and includes a torsion sleeve 200 whose one end is fixed on the central shaft 100 .
- the isolation sleeve 300 is sleeved, and the isolation sleeve 300 is also sleeved with a coil assembly 400.
- the coil assembly 400 is connected with the circuit board 500.
- the central shaft 100 is directly or indirectly connected to the pedal.
- the torque sleeve One end of the 200 is connected with the central shaft 100 through splines and rotates with the central shaft 100, and the other end is connected with an output part 101.
- the output part 101 can be a shaft part or a tooth.
- the torque sleeve 200 and the output part 101 can be connected by a one-way device
- the one-way device can be a pawl or a one-way clutch
- the one-way clutch can adopt the structure commonly used in the industry, in this technical solution
- One end of the isolation sleeve 300 is fixed with the torsion sleeve 200, and the other end is suspended.
- the outer surface of the torsion sleeve 200 is further provided with a shielding structure 201, and the isolation sleeve 300 is also provided with a shielding structure 201 matching with the shielding structure 201.
- the through-hole 301 of the center shaft 100 is driven to rotate when the person steps on the pedal. Since the torque is transmitted between the center shaft 100 and the output part 101 through the torsion sleeve 200, the torsion sleeve 200 is deformed at this time, thereby changing the torque sleeve 200.
- the shielding area between the isolation sleeve 300 and the isolation sleeve 300 means changing the magnetic flux rate.
- the coil assembly 400 detects the change in the magnetic flux rate under the shielding area and forms an electrical signal to transmit to the circuit board 500.
- the change of torque measured after processing and transformation improves the detection accuracy of the magnetic flux torsion sensor; and the torsion sleeve 200, the isolation sleeve 300, and the coil assembly 400 can be sequentially sleeved on the central shaft 100, and the structure is simple and easy to install , the connection with the central shaft 100 is firm, and the problem of falling off will not occur, which improves the stability and reliability of the magnetic flux torque sensor.
- the shielding structures 201 are disposed on the outer surface of the torsion sleeve 200 in the circumferential direction.
- the torsion sleeve 200 is cylindrical, and the shielding structures 201 are disposed on the cylinder.
- the central shaft 100 drives the output part 101 to rotate
- the torque is transmitted through the torsion sleeve 200, so that the torsion sleeve 200 is slightly deformed, which is usually elastic deformation.
- the resulting slight deformation can cause a change in the magnetic flux rate between the torsion sleeve 200 and the isolation sleeve 300.
- the change in the magnetic flux rate is detected by the coil assembly 400, and the change in the torsion force is obtained after processing the change by the circuit board 500. .
- the through holes 301 there are a plurality of the through holes 301 and are disposed on the sidewall of the isolation sleeve 300 corresponding to the plurality of the shielding structures 201 , and the shielding structures 201 are arranged to cooperate with the plurality of through holes 301
- the method can improve the detection accuracy, that is, the change of the shielding area between the torsion sleeve 200 and the isolation sleeve 300 can be refined, and the change of the magnetic flux rate can be accurately detected; in other embodiments, the through hole 301 It is arranged in a mesh shape, and its purpose is to further improve the detection accuracy.
- the shielding structures 201 and the through holes 301 are arranged staggered, and the purpose is that the diameter of the through holes 301 can be greater than or less than or equal to the maximum size of the shielding structure 201, so as to ensure that the torsion sleeve 200 is in the
- the shielding area between the shielding structure 201 and the boundary of the through hole 301 changes, preventing the through hole 301 from being in the shielding structure 201 all the time or the shielding structure 201 being in the through hole 301 without changing the shielding area , that is to say, the boundary of the through hole 301 needs to be projected into the shielding structure 201 and/or the boundary of the shielding structure 201 needs to be projected into the through hole 301 , so as to ensure that the isolation sleeve 300 and the torque sleeve 200 are elastically deformed.
- the overlapping partial area of the shielding structures 201 changes, that is, the shielding area changes, thereby causing a change in the magnetic flux
- the shielding structure 201 is a groove or a protrusion disposed on the outer surface of the torsion sleeve 200 .
- the groove is used as an example, and the groove is waist-shaped, The purpose is to ensure that the distance between the shielding structure 201 and the isolation sleeve 300 and the distance between the outer surface of the torsion sleeve 200 and the isolation sleeve 300 are different, so that when the torsion sleeve 200 is deformed, the magnetic flux rate can be changed. change, and the depth of the groove or the height of the protrusion can be set according to the actual situation.
- a magnetic isolation sleeve 600 is disposed between the coil assembly 400 and the circuit board 500 , the purpose of which is to prevent the magnetic field from being emitted and affecting the circuit board 500 .
- the coil assembly 400 includes a coil support and at least one set of induction coils wound on the coil support.
- the induction coils are wound on the coil support at a position corresponding to the through hole 301, the purpose of which is to further The detection accuracy is improved to ensure that the induction coil can accurately detect the change of the magnetic flux rate, which is then converted into an electrical signal and sent to the circuit board 500 .
- the coil assembly 400 is sleeved with a circuit board support 700, the circuit board 500 is mounted on the circuit board support 700, and the circuit board support 700 and the torsion sleeve 200 are connected through the rolling bearing 800, that is to say, when the central shaft 100 rotates, the torsion sleeve 200 , the isolation sleeve 300 and the coil assembly 400 rotate with the central shaft 100 , and the torsion sleeve 200 and the isolation sleeve 300 are opposite due to the elastic deformation of the torsion sleeve 200 .
- the coil assembly 400 detects the change of the magnetic flux rate caused by the change of the shielding area
- the magnetic isolation sleeve 600 can rotate with the torsion sleeve 200 or not rotate with the torsion sleeve 200
- the circuit The board support 700 is connected with the torsion sleeve 200 through the rolling bearing 800 , so that the circuit board support 700 does not rotate with the torsion sleeve 200 , thereby ensuring the stability and reliability of the magnetic flux torsion sensor.
- the circuit board support 700 is provided with a Hall sensor 900 , and the Hall sensor 900 is used to sense the rotational speed of the central shaft 100 , specifically, due to the torque sleeve 200 rotates synchronously with the central axle 100, so the rotational speed of the central axle 100 can be measured by detecting the rotational speed of the torsion sleeve 200 by the Hall sensor 900.
- the specifications are sufficient, and the specific structure of the Hall sensor 900 will not be repeated here.
- the torsion sleeve 200 described in all the above embodiments may be made of a material with high magnetic permeability, such as iron or iron alloy.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Power Steering Mechanism (AREA)
Abstract
Provided is a magnetic flux type torsion sensor. A torsion sleeve (200), an isolation sleeve (300), a coil assembly (400) and a circuit board (500) are sequentially arranged on a central shaft (100), a shielding structure (201) is arranged on the torsion sleeve (200), a through hole (301) matching the shielding structure (201) is arranged on the isolation sleeve (300), the torsion sleeve (200) rotates along with the central shaft (100) and drives an output part (101) to rotate, and the torsion sleeve (200) generates elastic deformation to change a shielding area between the torsion sleeve (200) and the isolation sleeve (300), thereby changing the magnetic flux; the coil assembly (400) detects the change of the magnetic flux in the shielding area so as to detect the change of the torsion, thereby improving the detection accuracy of the magnetic flux type torsion sensor; and the torsion sleeve (200), the isolation sleeve (300) and the coil assembly (400) can all sleeve on the central shaft (100) in sequence, thus the structure is simple and easy to install, the manner of connection thereof to the central shaft (100) is firm, the problem of parts falling off does not occur, and the stability and the reliability of the magnetic flux type torque sensor are improved.
Description
本发明涉及传感器技术领域，特别是一种磁通式扭力传感器。The invention relates to the technical field of sensors, in particular to a magnetic flux type torsion sensor.
传感器（英文名称：transducer/sensor）是一种检测装置，能感受到被测量的信息，并能将感受到的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求。Sensor (English name: transducer/sensor) is a detection device that can sense the measured information, and can transform the sensed information into electrical signals or other required forms of information output according to certain rules to meet the needs of information requirements for transmission, processing, storage, display, recording and control.
助力自行车，是一种新型二轮车辆，属于自行车的一种，以电池作为辅助动力来源，安有电机,并具备动力辅助***，能实现人力骑行和电机助动一体化的新型交通工具。扭力传感器是助力自行车电动助力***理解骑行者意图的核心部件，由于扭力传感器的存在使得在骑行过程中，能够根据所测得的扭力来调整电动自行车的电机输出功率，提高骑乘的舒适度。Power-assisted bicycle is a new type of two-wheeled vehicle, which belongs to a kind of bicycle. It uses a battery as an auxiliary power source, is equipped with a motor, and has a power auxiliary system, which can realize the integration of human riding and motor-assisted driving. The torque sensor is the core component of the electric power assist system of the power-assisted bicycle to understand the rider's intention. Due to the existence of the torque sensor, the motor output power of the electric bicycle can be adjusted according to the measured torque during the riding process, so as to improve the riding comfort. .
目前，助力自行车越来越多地采用中轴安装扭力传感器，常用的结构是在中轴或中轴连接的套管上粘贴应变片，通过应变片感应踩踏的扭力大小，通过信号处理后输出电压信号，进而控制电机的输出功率，这样的结构存在着检测精度不足，安装不易以及稳定性、可靠性低的问题。At present, more and more power-assisted bicycles use the central axle to install the torsion sensor. The commonly used structure is to paste the strain gauge on the central axle or the casing connected to the central axle. This structure has the problems of insufficient detection accuracy, difficult installation, and low stability and reliability.
发明内容SUMMARY OF THE INVENTION
为解决现有技术中存在的上述问题，本发明提供了一种磁通式扭力传感器。In order to solve the above problems existing in the prior art, the present invention provides a magnetic flux type torque sensor.
为解决上述技术问题，本发明采用如下技术方案：In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:
一种磁通式扭力传感器，安装在中轴上，包括：扭力套筒，一端与中轴固定连接并且随中轴转动，另一端与输出部连接；隔离套筒，套设在所述扭力套筒上并且一端与所述扭力套筒固定连接；线圈组件，套设在所述隔离套筒上；电路板，与所述线圈组件电连接；其中，所述扭力套筒的外表面设置有遮蔽结构，所述隔离套筒上设置有与所述遮蔽结构相配合的通孔，中轴带动所述扭力套筒转动，扭力套筒产生弹性形变而改变所述通孔与所述遮蔽结构之间的遮蔽面积。A magnetic flux type torsion sensor is installed on a central shaft, comprising: a torsion sleeve, one end of which is fixedly connected with the central shaft and rotates with the central shaft, and the other end is connected with an output part; an isolation sleeve is sleeved on the torsion sleeve one end of the barrel is fixedly connected with the torsion sleeve; a coil assembly is sleeved on the isolation sleeve; a circuit board is electrically connected with the coil assembly; wherein, the outer surface of the torsion sleeve is provided with a shield structure, the isolation sleeve is provided with a through hole matching the shielding structure, the central axis drives the torsion sleeve to rotate, and the torsion sleeve produces elastic deformation to change the distance between the through hole and the shielding structure the shaded area.
进一步地，所述遮蔽结构有若干个并且沿周向设置在所述扭力套筒的外表面。Further, there are several shielding structures and are arranged on the outer surface of the torsion sleeve in the circumferential direction.
进一步地，所述通孔有若干个并且与若干个所述遮蔽结构对应设置在所述隔离套筒的侧壁上。Further, a plurality of the through holes are provided on the side wall of the isolation sleeve corresponding to the plurality of the shielding structures.
进一步地，所述遮蔽结构为设置在所述扭力套筒外表面的凹槽或凸起。Further, the shielding structure is a groove or a protrusion provided on the outer surface of the torsion sleeve.
进一步地，所述凹槽或所述凸起呈腰形。Further, the groove or the protrusion is waist-shaped.
进一步地，所述遮蔽结构与所述通孔交错设置。Further, the shielding structures and the through holes are arranged alternately.
进一步地，所述通孔呈网孔分布在所述隔离套筒的侧壁上。Further, the through holes are distributed on the side wall of the isolation sleeve in the form of mesh holes.
进一步地，所述线圈组件与所述电路板之间设置有隔磁套筒。Further, a magnetic isolation sleeve is arranged between the coil assembly and the circuit board.
进一步地，所述线圈组件包括线圈支架以及至少一组感应线圈，所述感应线圈缠绕在所述线圈支架上对应所述通孔的位置。Further, the coil assembly includes a coil support and at least one set of induction coils, and the induction coils are wound on the coil support at positions corresponding to the through holes.
进一步地，所述线圈组件上套设有电路板支架，所述电路板安装在所述电路板支架上，并且所述电路板支架与所述扭力套筒之间通过滚动轴承连接。Further, a circuit board support is sleeved on the coil assembly, the circuit board is mounted on the circuit board support, and the circuit board support and the torsion sleeve are connected by a rolling bearing.
进一步地，所述电路板支架上设置有霍尔传感器，所述霍尔传感器用于感应中轴的转速。Further, a Hall sensor is provided on the circuit board bracket, and the Hall sensor is used to sense the rotational speed of the central shaft.
本发明主要具有以下有益效果：The present invention mainly has the following beneficial effects:
本发明的磁通式扭力传感器采用在中轴上依次设置扭力套筒、隔离套筒、线圈组件以及电路板的结构，并且扭力套筒上设置遮蔽结构，隔离套筒上设置与遮蔽结构相配合的通孔，扭力套筒的一端与输出部啮合时，中轴通过扭力套筒驱使输出部转动，并且扭力套筒发生弹性形变以改变扭力套筒与隔离套筒之间的遮蔽面积，从而改变磁通率，线圈组件检测遮蔽面积下磁通率的变化从而测得扭力的变化，提高该磁通式扭力传感器的检测精度，并且扭力套筒、隔离套筒、线圈组件均可以依次套设在中轴上，结构简单易安装，与中轴的连接方式牢固，不会出现脱落的问题，提高该磁通式扭力传感器的稳定性和可靠性。The magnetic flux torsion sensor of the present invention adopts a structure in which a torsion sleeve, an isolation sleeve, a coil assembly and a circuit board are sequentially arranged on the central axis, and a shielding structure is arranged on the torsion sleeve, and the shielding structure is arranged on the isolation sleeve to cooperate with the shielding structure. When one end of the torsion sleeve is engaged with the output part, the central shaft drives the output part to rotate through the torsion sleeve, and the torsion sleeve is elastically deformed to change the shielding area between the torsion sleeve and the isolation sleeve, thereby changing the The magnetic flux rate, the coil assembly detects the change of the magnetic flux rate under the shielding area to measure the change of the torsion force, which improves the detection accuracy of the magnetic flux torsion sensor. On the central axis, the structure is simple and easy to install, and the connection with the central axis is firm, and there is no problem of falling off, which improves the stability and reliability of the magnetic flux torsion sensor.
图1是本发明实施例的磁通式扭力传感器的装配示意图；FIG. 1 is an assembly schematic diagram of a magnetic flux torque sensor according to an embodiment of the present invention;
图2是本发明实施例的磁通式扭力传感器的结构示意图；2 is a schematic structural diagram of a magnetic flux torsion sensor according to an embodiment of the present invention;
图3是本发明实施例的磁通式扭力传感器的剖面示意图。3 is a schematic cross-sectional view of a magnetic flux torque sensor according to an embodiment of the present invention.
具体实施方式detailed description
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
参照图1至图3所示的一种磁通式扭力传感器，该磁通式扭力传感器安装在中轴100上，其包括一端固定在中轴100上的扭力套筒200，扭力套筒200上套接有隔离套筒300，并且隔离套筒300上还套接有线圈组件400，线圈组件400连接有电路板500，具体的，中轴100通过直接或间接的方式连接踏板，该扭力套筒200的一端通过花键与中轴100连接并且随中轴100转动，另一端连接有输出部101，需要说明的是，在本实施例中，所述输出部101可以是轴类零件或齿类零件，并且扭力套筒200与输出部101之间可以通过单向装置连接，该单向装置可以是棘爪或单向离合器，该单向离合器可以采用行业内常用的结构，在本技术方案中不再赘述；隔离套筒300的一端与扭力套筒200固定，另一端悬空，扭力套筒200的外表面还设置有遮蔽结构201，隔离套筒300上还设置有与该遮蔽结构201相配合的通孔301，当人脚踏踏板时带动中轴100转动，由于中轴100与输出部101之间通过扭力套筒200传递扭矩，此时扭力套筒200发生形变，从而改变扭力套筒200与隔离套筒300之间的遮蔽面积，也就是改变磁通率，线圈组件400检测到遮蔽面积下磁通率的变化并形成电信号而传输到电路板500中，电路板500接收电信号后经处理转化后测得扭力的变化，提高该磁通式扭力传感器的检测精度；并且扭力套筒200、隔离套筒300、线圈组件400均可以依次套设在中轴100上，结构简单易安装，与中轴100的连接方式牢固，不会出现脱落的问题，提高该磁通式扭力传感器的稳定性和可靠性。Referring to a magnetic flux type torsion sensor shown in FIGS. 1 to 3 , the magnetic flux type torsion sensor is installed on the central shaft 100 , and includes a torsion sleeve 200 whose one end is fixed on the central shaft 100 . The isolation sleeve 300 is sleeved, and the isolation sleeve 300 is also sleeved with a coil assembly 400. The coil assembly 400 is connected with the circuit board 500. Specifically, the central shaft 100 is directly or indirectly connected to the pedal. The torque sleeve One end of the 200 is connected with the central shaft 100 through splines and rotates with the central shaft 100, and the other end is connected with an output part 101. It should be noted that, in this embodiment, the output part 101 can be a shaft part or a tooth. Parts, and the torque sleeve 200 and the output part 101 can be connected by a one-way device, the one-way device can be a pawl or a one-way clutch, the one-way clutch can adopt the structure commonly used in the industry, in this technical solution One end of the isolation sleeve 300 is fixed with the torsion sleeve 200, and the other end is suspended. The outer surface of the torsion sleeve 200 is further provided with a shielding structure 201, and the isolation sleeve 300 is also provided with a shielding structure 201 matching with the shielding structure 201. The through-hole 301 of the center shaft 100 is driven to rotate when the person steps on the pedal. Since the torque is transmitted between the center shaft 100 and the output part 101 through the torsion sleeve 200, the torsion sleeve 200 is deformed at this time, thereby changing the torque sleeve 200. The shielding area between the isolation sleeve 300 and the isolation sleeve 300 means changing the magnetic flux rate. The coil assembly 400 detects the change in the magnetic flux rate under the shielding area and forms an electrical signal to transmit to the circuit board 500. After the circuit board 500 receives the electrical signal The change of torque measured after processing and transformation improves the detection accuracy of the magnetic flux torsion sensor; and the torsion sleeve 200, the isolation sleeve 300, and the coil assembly 400 can be sequentially sleeved on the central shaft 100, and the structure is simple and easy to install , the connection with the central shaft 100 is firm, and the problem of falling off will not occur, which improves the stability and reliability of the magnetic flux torque sensor.
在一些实施例中，所述遮蔽结构201有若干个并且沿周向设置在所述扭力套筒200的外表面，具体的，该扭力套筒200呈圆筒状，遮蔽结构201设置在圆筒状扭力套筒200的外表面，中轴100驱使输出部101转动时，通过扭力套筒200传递扭矩，从而使得扭力套筒200产生微小的形变，该形变通常是弹性形变，扭力套筒200上产生的微小形变能够引起扭力套筒200与隔离套筒300之间的磁通率变化，通过线圈组件400检测到该磁通率变化，进而通过电路板500将该变化处理后得出扭力的变化。In some embodiments, there are several shielding structures 201 and are disposed on the outer surface of the torsion sleeve 200 in the circumferential direction. Specifically, the torsion sleeve 200 is cylindrical, and the shielding structures 201 are disposed on the cylinder. When the central shaft 100 drives the output part 101 to rotate, the torque is transmitted through the torsion sleeve 200, so that the torsion sleeve 200 is slightly deformed, which is usually elastic deformation. The resulting slight deformation can cause a change in the magnetic flux rate between the torsion sleeve 200 and the isolation sleeve 300. The change in the magnetic flux rate is detected by the coil assembly 400, and the change in the torsion force is obtained after processing the change by the circuit board 500. .
在一些实施例中，所述通孔301有若干个并且与若干个所述遮蔽结构201对应设置再隔离套筒300的侧壁上，通过设置若干个遮蔽结构201与若干个通孔301相配合的方式能够提升检测精度，即能够细化扭力套筒200与隔离套筒300之间的遮蔽面积的变化，进而准确检测到磁通率的变化；而在另外一些实施例中，该通孔301呈网孔状布置，其目的在于能够进一步提升检测精度。In some embodiments, there are a plurality of the through holes 301 and are disposed on the sidewall of the isolation sleeve 300 corresponding to the plurality of the shielding structures 201 , and the shielding structures 201 are arranged to cooperate with the plurality of through holes 301 The method can improve the detection accuracy, that is, the change of the shielding area between the torsion sleeve 200 and the isolation sleeve 300 can be refined, and the change of the magnetic flux rate can be accurately detected; in other embodiments, the through hole 301 It is arranged in a mesh shape, and its purpose is to further improve the detection accuracy.
在一些实施例中，所述遮蔽结构201与所述通孔301交错设置，其目的在于，通孔301的孔径能够大于或小于或等于遮蔽结构201的最大尺寸，这样能够保证扭力套筒200在发生弹性形变时，遮蔽结构201与通孔301的边界之间的遮蔽面积发生变化，避免通孔301一直在遮蔽结构201内或者是遮蔽结构201一直在通孔301内而不产生遮蔽面积的变化，也就是说，通孔301的边界需要可以投影在遮蔽结构201内和/或遮蔽结构201的边界需要可以投影到通孔301内，从而保证扭力套筒200发生弹性形变时隔离套筒300与遮蔽结构201相重合的部分面积发生变化，也就是遮蔽面积发生变化，从而引起磁通率的变化。In some embodiments, the shielding structures 201 and the through holes 301 are arranged staggered, and the purpose is that the diameter of the through holes 301 can be greater than or less than or equal to the maximum size of the shielding structure 201, so as to ensure that the torsion sleeve 200 is in the When elastic deformation occurs, the shielding area between the shielding structure 201 and the boundary of the through hole 301 changes, preventing the through hole 301 from being in the shielding structure 201 all the time or the shielding structure 201 being in the through hole 301 without changing the shielding area , that is to say, the boundary of the through hole 301 needs to be projected into the shielding structure 201 and/or the boundary of the shielding structure 201 needs to be projected into the through hole 301 , so as to ensure that the isolation sleeve 300 and the torque sleeve 200 are elastically deformed. The overlapping partial area of the shielding structures 201 changes, that is, the shielding area changes, thereby causing a change in the magnetic flux rate.
在一些实施例中，参照图1所示，所述遮蔽结构201为设置在扭力套筒200外表面的凹槽或凸起，本实施例以凹槽为例，并且该凹槽呈腰形，其目的在于保证遮蔽结构201与隔离套筒300之间的距离以及扭力套筒200外表面与隔离套筒300之间的距离不一，进而在扭力套筒200发生形变时能够引起磁通率的变化，并且凹槽的深度或凸起的高度可以根据实际情况设定。In some embodiments, as shown in FIG. 1 , the shielding structure 201 is a groove or a protrusion disposed on the outer surface of the torsion sleeve 200 . In this embodiment, the groove is used as an example, and the groove is waist-shaped, The purpose is to ensure that the distance between the shielding structure 201 and the isolation sleeve 300 and the distance between the outer surface of the torsion sleeve 200 and the isolation sleeve 300 are different, so that when the torsion sleeve 200 is deformed, the magnetic flux rate can be changed. change, and the depth of the groove or the height of the protrusion can be set according to the actual situation.
在一些实施例中，参照图1与图3所示，所述线圈组件400与所述电路板500之间设置有隔磁套筒600，其目的在于避免磁场散发出去从而影响到电路板500。In some embodiments, as shown in FIG. 1 and FIG. 3 , a magnetic isolation sleeve 600 is disposed between the coil assembly 400 and the circuit board 500 , the purpose of which is to prevent the magnetic field from being emitted and affecting the circuit board 500 .
在一些实施例中，所述线圈组件400包括线圈支架以及缠绕在所述线圈支架上的至少一组感应线圈，具体的该感应线圈缠绕在线圈支架上对应通孔301的位置，其目的在于进一步提高检测的精度，保证感应线圈能够精确检测到磁通率的变化，进而转化为电信号发送至电路板500上。In some embodiments, the coil assembly 400 includes a coil support and at least one set of induction coils wound on the coil support. Specifically, the induction coils are wound on the coil support at a position corresponding to the through hole 301, the purpose of which is to further The detection accuracy is improved to ensure that the induction coil can accurately detect the change of the magnetic flux rate, which is then converted into an electrical signal and sent to the circuit board 500 .
在一些实施例中，所述线圈组件400上套设有电路板支架700，电路板500安装在电路板支架700上，并且电路板支架700与扭力套筒200之间通过滚动轴承800连接，也就是说，在中轴100转动时候，扭力套筒200、隔离套筒300以及线圈组件400随中轴100转动，扭力套筒200与隔离套筒300之间因扭力套筒200发生弹性形变而产生相对转动从而引起遮蔽面积的变化，线圈组件400检测因遮蔽面积的变化而引起的磁通率变化，而隔磁套筒600可以随扭力套筒200转动，也可以不随扭力套筒200转动，而电路板支架700则通过滚动轴承800与扭力套筒200连接，使得电路板支架700不随扭力套筒200转动，保证该磁通式扭力传感器的稳定性和可靠性。In some embodiments, the coil assembly 400 is sleeved with a circuit board support 700, the circuit board 500 is mounted on the circuit board support 700, and the circuit board support 700 and the torsion sleeve 200 are connected through the rolling bearing 800, that is That is to say, when the central shaft 100 rotates, the torsion sleeve 200 , the isolation sleeve 300 and the coil assembly 400 rotate with the central shaft 100 , and the torsion sleeve 200 and the isolation sleeve 300 are opposite due to the elastic deformation of the torsion sleeve 200 . Rotation causes the change of the shielding area, the coil assembly 400 detects the change of the magnetic flux rate caused by the change of the shielding area, and the magnetic isolation sleeve 600 can rotate with the torsion sleeve 200 or not rotate with the torsion sleeve 200, and the circuit The board support 700 is connected with the torsion sleeve 200 through the rolling bearing 800 , so that the circuit board support 700 does not rotate with the torsion sleeve 200 , thereby ensuring the stability and reliability of the magnetic flux torsion sensor.
在一些实施例中，参照图1与图2所示，所述电路板支架700上设置有霍尔传感器900，该霍尔传感器900用于感应中轴100的转速，具体的，由于扭力套筒200随中轴100同步转动，因而通过霍尔传感器900检测扭力套筒200的转速即可测出中轴100的转速，在本实施例中，该霍尔传感器900可以采用市面上常规的型号与规格即可，在此不再赘述该霍尔传感器900的具体结构。In some embodiments, as shown in FIGS. 1 and 2 , the circuit board support 700 is provided with a Hall sensor 900 , and the Hall sensor 900 is used to sense the rotational speed of the central shaft 100 , specifically, due to the torque sleeve 200 rotates synchronously with the central axle 100, so the rotational speed of the central axle 100 can be measured by detecting the rotational speed of the torsion sleeve 200 by the Hall sensor 900. The specifications are sufficient, and the specific structure of the Hall sensor 900 will not be repeated here.
需要说明的是，上述所有实施例所述的扭力套筒200可以采用高磁导率的材料制成，如铁或铁合金等。It should be noted that, the torsion sleeve 200 described in all the above embodiments may be made of a material with high magnetic permeability, such as iron or iron alloy.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。The above are the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications may also be regarded as It is the protection scope of the present invention.
Claims (10)
- 一种磁通式扭力传感器，安装中轴上，其特征在于，包括：A magnetic flux type torque sensor, which is installed on the central axis, is characterized in that, it includes:扭力套筒，可随中轴转动，一端与中轴固定连接，另一端与输出部连接；Torsion sleeve, which can rotate with the central axis, one end is fixedly connected with the central axis, and the other end is connected with the output part;隔离套筒，套设在所述扭力套筒上并且一端与所述扭力套筒固定连接；an isolation sleeve, sleeved on the torsion sleeve and fixedly connected with the torsion sleeve at one end;线圈组件，套设在所述隔离套筒上；a coil assembly sleeved on the isolation sleeve;电路板，与所述线圈组件电连接；a circuit board, electrically connected to the coil assembly;其中，所述扭力套筒的外表面设置有遮蔽结构，所述隔离套筒上设置有与所述遮蔽结构相配合的通孔，所述扭力套筒随中轴转动并发生弹性形变而改变所述扭力套筒与所述隔离套筒之间的遮蔽面积。Wherein, the outer surface of the torsion sleeve is provided with a shielding structure, the isolation sleeve is provided with a through hole matched with the shielding structure, and the torsion sleeve changes as the central axis rotates and elastically deforms. The shielding area between the torsion sleeve and the isolation sleeve.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述遮蔽结构有若干个并且沿周向设置在所述扭力套筒的外表面。The magnetic flux torsion sensor according to claim 1, wherein there are several shielding structures and are arranged on the outer surface of the torsion sleeve along the circumferential direction.
- 根据权利要求2所述的一种磁通式扭力传感器，其特征在于，所述通孔有若干个并且与若干个所述遮蔽结构对应设置在所述隔离套筒的侧壁上。The magnetic flux type torque sensor according to claim 2, wherein there are several through holes and are provided on the side wall of the isolation sleeve corresponding to the several shielding structures.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述遮蔽结构与所述通孔交错设置。The magnetic flux torsion sensor according to claim 1, wherein the shielding structure and the through hole are arranged alternately.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述遮蔽结构为设置在所述扭力套筒外表面的凹槽或凸起。The magnetic flux torsion sensor according to claim 1, wherein the shielding structure is a groove or a protrusion provided on the outer surface of the torsion sleeve.
- 根据权利要求1至5任一项所述的一种磁通式扭力传感器，其特征在于，所述通孔呈网孔分布在所述隔离套筒的侧壁上。The magnetic flux torque sensor according to any one of claims 1 to 5, wherein the through holes are distributed on the side wall of the isolation sleeve in the form of mesh holes.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述线圈组件与所述电路板之间设置有隔磁套筒。The magnetic flux torque sensor according to claim 1, wherein a magnetic isolation sleeve is arranged between the coil assembly and the circuit board.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述线圈组件包括线圈支架以及至少一组感应线圈，所述感应线圈缠绕在所述线圈支架上对应所述通孔的位置。The magnetic flux torsion sensor according to claim 1, wherein the coil assembly comprises a coil support and at least one set of induction coils, and the induction coils are wound on the coil support corresponding to the through holes. Location.
- 根据权利要求1所述的一种磁通式扭力传感器，其特征在于，所述线圈组件上套设有电路板支架，所述电路板安装在所述电路板支架上，并且所述电路板支架与所述扭力套筒之间通过滚动轴承连接。The magnetic flux torque sensor according to claim 1, wherein a circuit board bracket is sleeved on the coil assembly, the circuit board is mounted on the circuit board bracket, and the circuit board bracket is It is connected with the torsion sleeve through a rolling bearing.
- 根据权利要求9所述的一种磁通式扭力传感器，其特征在于，所述电路板支架上设置有霍尔传感器，所述霍尔传感器用于感应中轴的转速。The magnetic flux torque sensor according to claim 9, wherein a hall sensor is arranged on the circuit board support, and the hall sensor is used to sense the rotation speed of the central shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010693373.7 | 2020-07-17 | ||
| CN202010693373.7A CN111693192A (en) | 2020-07-17 | 2020-07-17 | Magnetic flux type torsion sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022011831A1 true WO2022011831A1 (en) | 2022-01-20 |
Family
ID=72486244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2020/116661 WO2022011831A1 (en) | 2020-07-17 | 2020-09-22 | Magnetic flux type torsion sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111693192A (en) |
| WO (1) | WO2022011831A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394305B (en) * | 2020-10-23 | 2022-12-20 | 联钢精密科技(中国)有限公司 | Magnetic flux rate detection equipment |
| WO2022236797A1 (en) * | 2021-05-14 | 2022-11-17 | Cyc Motor Limited | A torque sensing system, a conversion kit with a torque sensing system, and a vehicle with a torque sensing system |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201828370U (en) * | 2010-08-31 | 2011-05-11 | 杭州飞越汽车零部件有限公司 | Automotive steering torque measurement device |
| CN203606051U (en) * | 2013-11-13 | 2014-05-21 | 重庆长风机器有限责任公司 | Electromagnetic torque sensor in electric power steering system |
| DE102017106842A1 (en) * | 2016-04-01 | 2017-10-05 | Hitachi Metals, Ltd. | TORQUE SENSOR |
| WO2018108783A2 (en) * | 2016-12-12 | 2018-06-21 | Idt Europe Gmbh | Ultra-thin combined inductive torque and angle sensor for steering wheel position sensing |
| 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 |
| CN210653525U (en) * | 2019-09-30 | 2020-06-02 | 昆山朗德森机电科技有限公司 | Power-assisted bicycle torque sensor and power-assisted bicycle |
| CN212275119U (en) * | 2020-07-17 | 2021-01-01 | 珠海市钧兴机电有限公司 | Magnetic flux type torsion sensor |
-
2020
- 2020-07-17 CN CN202010693373.7A patent/CN111693192A/en active Pending
- 2020-09-22 WO PCT/CN2020/116661 patent/WO2022011831A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201828370U (en) * | 2010-08-31 | 2011-05-11 | 杭州飞越汽车零部件有限公司 | Automotive steering torque measurement device |
| CN203606051U (en) * | 2013-11-13 | 2014-05-21 | 重庆长风机器有限责任公司 | Electromagnetic torque sensor in electric power steering system |
| DE102017106842A1 (en) * | 2016-04-01 | 2017-10-05 | Hitachi Metals, Ltd. | TORQUE SENSOR |
| WO2018108783A2 (en) * | 2016-12-12 | 2018-06-21 | Idt Europe Gmbh | Ultra-thin combined inductive torque and angle sensor for steering wheel position sensing |
| 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 |
| CN210653525U (en) * | 2019-09-30 | 2020-06-02 | 昆山朗德森机电科技有限公司 | Power-assisted bicycle torque sensor and power-assisted bicycle |
| CN212275119U (en) * | 2020-07-17 | 2021-01-01 | 珠海市钧兴机电有限公司 | Magnetic flux type torsion sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111693192A (en) | 2020-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022011831A1 (en) | Magnetic flux type torsion sensor | |
| US10358185B2 (en) | Electric vehicle central shaft torque sensing system | |
| EP3056421B1 (en) | Electric bicycle central axle torque speed sense device | |
| CN104709430B (en) | Treading force output device which is used for middle shaft torque sensing system of electric bike and is in two-stage spline connection | |
| CN204110305U (en) | A kind of battery-driven car axis moment sensing system | |
| EP3912897A1 (en) | Freehub torque and speed sensing device | |
| JP2017522232A (en) | Electric bicycle central motor and its torque detection device | |
| CN103419889A (en) | Power control mechanism of electric power bicycle | |
| CN209634670U (en) | A kind of electric bicycle column foot speed of torque sensing device | |
| CN212275119U (en) | Magnetic flux type torsion sensor | |
| TWI788001B (en) | A torque sensor for electric bicycle | |
| CN106953470B (en) | Electric motor car moment induction measuring formula motor | |
| CN109506815B (en) | Suspension type electric bicycle torque sensor | |
| CN206790301U (en) | A kind of electric car torque inductively measures formula motor | |
| CN212125426U (en) | Dynamic and static combined torque sensor of electric power-assisted bicycle | |
| CN206750059U (en) | Electrical bicycle middle shaft Dao Sha mechanisms with the fail safe function of falling brake | |
| CN219770097U (en) | Center shaft moment sensor device and electric booster bicycle | |
| CN109969333B (en) | Electric Bicycle Torque Measuring Mechanism Based on Planetary Gear Train Transmission System | |
| CN219545010U (en) | Moment sensor and motor integrated hub motor | |
| WO2020042811A1 (en) | Center-shaft type torque sensor of electrically power-assisted bicycle | |
| US20220299388A1 (en) | Dynamic torque sensing device of thread-on freewheel structure | |
| WO2022121117A1 (en) | Bicycle torque transmission mechanism and system, and electric power-assisted bicycle | |
| CN217805068U (en) | Torque sensor, booster device and booster bicycle | |
| CN202624560U (en) | Power assisting control mechanism of electric power-assisted bicycle | |
| CN218489817U (en) | Pedal force sensing device and moped |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 20945034 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 20945034 Country of ref document: EP Kind code of ref document: A1 |