KR100726411B1 - Apparatus for detecting torque - Google Patents

Apparatus for detecting torque Download PDF

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Publication number
KR100726411B1
KR100726411B1 KR1020060066310A KR20060066310A KR100726411B1 KR 100726411 B1 KR100726411 B1 KR 100726411B1 KR 1020060066310 A KR1020060066310 A KR 1020060066310A KR 20060066310 A KR20060066310 A KR 20060066310A KR 100726411 B1 KR100726411 B1 KR 100726411B1
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South Korea
Prior art keywords
magnet
rotated
gear
rotation angle
output shaft
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KR1020060066310A
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Korean (ko)
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이창환
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엘지이노텍 주식회사
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Priority to KR1020060066310A priority Critical patent/KR100726411B1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G01L3/02—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
    • B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
    • B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
    • 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
    • G01L3/104—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 permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/307—Torque sensors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

A torque detecting device is provided to directly detect a rotated angle of an input shaft connected with a steering handle of a vehicle and a rotated angle of an output shaft connected with a steering wheel, to detect torque by using a difference of the rotated angles, and to improve accuracy and reliability by no influence of external factors, such as temperature. A torque detecting device comprises an input shaft(120), an output shaft(130), a torsion bar(110), a first rotation angle detecting means, a second rotation angle detecting means, and a control unit. The input shaft is rotated by a steering handle and formed with first teeth(123) on the outer peripheral surface. The output shaft is connected toward a steering wheel and formed with second teeth(133) on the outer peripheral surface. The torsion bar transmits the rotation force of the input shaft to the output shaft. The first rotation angle detecting means has a first gear(141), a first magnet(171), and a first sensor(181). The first gear is engaged with the first teeth. The first magnet is interlocked and rotated with the first gear. The first sensor detects a rotated angel of the first magnet. The second rotation angle detecting means has a second gear(145), a second magnet(175), and a second sensor(185). The second gear is engaged with the second teeth. The second magnet is interlocked and rotated with the second gear. The second sensor detects a rotated angle of the second magnet. The control unit receives rotation angles of the first and second magnets from the detecting means to calculate a difference of the rotation angles and to measure a torque. The first and second sensors are rotary hall integrated circuits. The first and second magnets are divided into two poles.

Description

토크 검출장치 {APPARATUS FOR DETECTING TORQUE}Torque Detection Device {APPARATUS FOR DETECTING TORQUE}

도 1은 종래의 토크 검출장치를 보인 도.1 is a view showing a conventional torque detection device.

도 2는 본 발명의 일 실시예에 따른 토크 검출장치를 보인 도.Figure 2 shows a torque detection device according to an embodiment of the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

110 : 토션바 120 : 입력축110: torsion bar 120: input shaft

130 : 출력축 123,133 : 제 1,2 치130: output shaft 123,133: first and second

141,145 : 제 1,2 기어 151,155 : 제 1,2 홀더141,145: first and second gear 151,155: first and second holder

161,165 : 제 1,2 지지축 171,175 : 제 1,2 마그네트161,165: 1st and 2nd support shaft 171,175: 1st and 2nd magnet

181,185 : 제 1,2 센서181,185: first and second sensors

본 발명은 차량용 파워 스티어링 시스템에 사용되는 토크 검출장치에 관한 것이다.The present invention relates to a torque detection device used in a vehicle power steering system.

차량용 스티어링 시스템이란 스티어링 핸들을 회전시켜 조향 바퀴를 조향시키는 장치를 말한다. 그리고, 차량용 파워 스티어링 시스템이란 조향 바퀴와 노면 사이에 작용하는 마찰력에 의하여 스티어링 핸들을 조작하기 위한 조작력이 크므 로, 보조 조작력을 조향 바퀴측에 제공하여 스티어링 핸들을 원활하게 조작할 수 있도록 한 장치를 말한다.A vehicle steering system is a device for steering a steering wheel by rotating a steering wheel. In addition, the vehicle power steering system has a large operation force for operating the steering wheel by the friction force acting between the steering wheel and the road surface, and thus provides an auxiliary operation force to the steering wheel side to smoothly operate the steering wheel. Say.

조향 바퀴에 제공되는 보조 조작력의 크기는 스티어링 핸들의 토크를 측정하여 결정한다. 도 1은 종래의 토크 검출장치를 보인 도로서, 이를 설명한다.The amount of auxiliary operating force provided on the steering wheel is determined by measuring the torque of the steering wheel. 1 is a view showing a conventional torque detection device, it will be described.

도시된 바와 같이, 스티어링 핸들과 결합된 입력축(11)과 차량의 조향 바퀴와 결합된 출력축(13)이 마련되고, 입력축(11)과 출력축(13)은 토션바(15)에 의하여 상호 연결된다.As shown, an input shaft 11 coupled with a steering handle and an output shaft 13 coupled with a steering wheel of the vehicle are provided, and the input shaft 11 and the output shaft 13 are interconnected by a torsion bar 15. .

입력축(11) 및 출력축(13)에는 링형상의 제 1 및 제 2 마그네트(21,23)가 각각 결합되는데, 제 1 및 제 2 마그네트(21,23)는 각각 입력축(11) 및 출력축(13)과 동일하게 회전한다. 이때, 제 1 마그네트(21)는 상호 분리된 한 쌍으로 마련되고, 제 2 마그네트(23)는 제 1 마그네트(21) 사이에 설치되어 양단부측이 제 1 마그네트(21)와 대향한다.Ring-shaped first and second magnets 21 and 23 are coupled to the input shaft 11 and the output shaft 13, respectively, and the first and second magnets 21 and 23 are input shaft 11 and output shaft 13, respectively. Rotate the same as). At this time, the first magnet 21 is provided in a pair separated from each other, the second magnet 23 is provided between the first magnet 21 so that both end sides thereof face the first magnet 21.

그리고, 제 1 및 제 2 마그네트(21,23)의 외측에는 제 1 및 제 2 마그네트(21,23)의 단부측을 감싸는 형태로 감지코일 및 보상코일(31,33)이 각각 설치된다.In addition, the sensing coils and the compensation coils 31 and 33 are installed outside the first and second magnets 21 and 23 so as to surround end portions of the first and second magnets 21 and 23, respectively.

상기와 같이 구성된 종래의 토크 검출장치의 동작을 설명한다.The operation of the conventional torque detection device configured as described above will be described.

상기 스티어링 핸들을 조작하여 입력축(11)을 회전시키면, 제 1 마그네트(21)는 입력축(11)과 동일하게 회전한다. 그러나, 입력축(11)과 출력축(13)은 토션바(15)에 의하여 연결되어 있으므로, 입력축(11)과 출력축(13)의 회전각도는 상이하다. 이로 인해, 제 1 마그네트(21)와 제 2 마그네트(23)의 회전각도도 상이하 므로, 제 1 마그네트(21)와 제 2 마그네트(23)의 대향 면적은 회전각도에 따라 변하게 된다.When the input shaft 11 is rotated by operating the steering handle, the first magnet 21 rotates in the same manner as the input shaft 11. However, since the input shaft 11 and the output shaft 13 are connected by the torsion bar 15, the rotation angles of the input shaft 11 and the output shaft 13 are different. For this reason, since the rotation angles of the first magnet 21 and the second magnet 23 are also different, the opposing areas of the first magnet 21 and the second magnet 23 change according to the rotation angle.

제 1 마그네트(21)와 제 2 마그네트(23)의 대향 면적이 변하면, 감지코일(31)의 인덕턴스도 변하므로, 차량의 제어부(미도시)는 감지코일(31)의 인덕턴스를 감지하여 토크를 측정하고, 이에 따른 적절한 보조 조작력을 출력축(13)에 제공한다.When the opposing areas of the first magnet 21 and the second magnet 23 change, the inductance of the sensing coil 31 also changes, so that the control unit (not shown) of the vehicle senses the inductance of the sensing coil 31 to generate torque. And outputs the appropriate auxiliary operating force to the output shaft 13 accordingly.

그러나, 상기와 같은 종래의 토크 검출장치는 온도에 민감한 감지코일(31)의 인덕턴스를 감지하여 토크를 측정하므로, 외부의 온도에 따라 측정된 토크의 값에 큰 편차가 존재한다. 이로 인해, 신뢰성이 저하되는 단점이 있다.However, since the conventional torque detection device as described above measures the torque by sensing the inductance of the sensing coil 31 sensitive to temperature, there is a large deviation in the value of the torque measured according to the external temperature. For this reason, there exists a disadvantage that reliability falls.

이를 해소하기 위하여, 온도를 보상할 수 있는 보상코일(33)을 설치하여 토크를 측정하나, 보상코일(33)도 온도에 민감하므로 정확한 토크를 측정하는데는 한계가 있다.In order to solve this problem, the torque is measured by installing a compensation coil 33 capable of compensating the temperature. However, since the compensation coil 33 is also sensitive to temperature, there is a limit in measuring accurate torque.

본 발명은 상기와 같은 종래 기술의 문제점을 해소하기 위하여 안출된 것으로, 본 발명의 목적은 정확한 토크를 측정하여 신뢰성을 향상시킬 수 있는 토크 검출장치를 제공함에 있다.The present invention has been made to solve the problems of the prior art as described above, an object of the present invention to provide a torque detection device that can improve the reliability by measuring the exact torque.

상기 목적을 달성하기 위한 본 발명에 따른 토크 검출장치는, 스티어링 핸들에 의하여 회전하며 외주면에 제 1 치(齒)가 형성된 입력축; 조향 바퀴측에 연결되고 외주면에 제 2 치(齒)가 형성된 출력축; 상기 입력축의 회전력을 상기 출력축으 로 전달하는 토션바; 상기 제 1 치와 맞물리는 제 1 기어, 상기 제 1 기어와 연동하여 회전하는 제 1 마그네트, 상기 제 1 마그네트의 회전각도를 감지하는 제 1 센서를 가지는 제 1 회전각도 검출수단; 상기 제 2 치와 맞물리는 제 2 기어, 상기 제 2 기어와 연동하여 회전하는 제 2 마그네트, 상기 제 2 마그네트의 회전각도를 감지하는 제 2 센서를 가지는 제 2 회전각도 검출수단; 및 상기 제 1 및 제 2 회전각도 검출수단으로부터 상기 제 1 및 제 2 마그네트의 회전각도를 송신받아 회전각도의 차를 계산하여 토크를 측정하는 제어부를 포함한다.Torque detection apparatus according to the present invention for achieving the above object, the input shaft is rotated by the steering handle and the first tooth is formed on the outer peripheral surface; An output shaft connected to the steering wheel side and having a second tooth formed on an outer circumferential surface thereof; A torsion bar for transmitting the rotational force of the input shaft to the output shaft; First rotation angle detection means having a first gear meshing with the first tooth, a first magnet rotating in conjunction with the first gear, and a first sensor sensing a rotation angle of the first magnet; Second rotation angle detection means having a second gear meshing with the second tooth, a second magnet rotating in conjunction with the second gear, and a second sensor sensing a rotation angle of the second magnet; And a control unit for receiving a rotation angle of the first and second magnets from the first and second rotation angle detection means and calculating a torque by calculating a difference between the rotation angles.

이하, 첨부한 도면을 참조하여 본 발명의 일 실시예에 따른 토크 검출장치를 상세히 설명한다.Hereinafter, a torque detection apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 일 실시예에 따른 토크 검출장치를 보인 도이다.2 is a view showing a torque detection device according to an embodiment of the present invention.

도시된 바와 같이, 토션바(110)를 매체로 상호 연결된 입력축(120)과 출력축(130)이 마련된다.As shown, the input shaft 120 and the output shaft 130 interconnected to the torsion bar 110 is provided.

입력축(120)은 차량의 운전석에 설치되어 운전자의 조작력인 외력에 의하여 회전하는 스티어링 핸들(미도시)과 연결되어 상기 스티어링 핸들과 동일하게 회전한다. 출력축(130)은 조향 바퀴인 차량의 전륜과 연결되며 입력축(120)으로부터 힘을 전달받아 회전된다.The input shaft 120 is connected to a steering wheel (not shown) installed in the driver's seat of the vehicle and rotated by an external force, which is a driver's manipulation force, to rotate in the same manner as the steering wheel. The output shaft 130 is connected to the front wheel of the vehicle, which is a steering wheel, is rotated by receiving a force from the input shaft 120.

운전자의 조작력만으로 조향 바퀴를 회전시키기에는 많은 힘이 들므로, 출력축(130)에 모터 등을 이용하여 보조 조작력을 제공해 주는 파워 스티어링 시스템이 사용되고 있다. 파워 스티어링 시스템에서 제공하는 보조 조작력은 입력축(120)과 출력축(130)을 연결하는 토션바(110)의 토크를 측정하여 결정한다. 즉, 출력 축(130)은 노면과 접촉된 조향 바퀴와 연결되어 있고, 입력축(120)의 회전력을 토션바(110)를 통하여 전달받으므로, 소정 이상의 외력이 입력축(120)에 작용하면 토션바(110)에 토크가 발생한다.Since it takes a lot of power to rotate the steering wheel only by the driver's operation force, a power steering system that provides an auxiliary operation force using a motor or the like to the output shaft 130 is used. The auxiliary operating force provided by the power steering system is determined by measuring the torque of the torsion bar 110 connecting the input shaft 120 and the output shaft 130. That is, the output shaft 130 is connected to the steering wheel in contact with the road surface, and receives the rotational force of the input shaft 120 through the torsion bar 110, the torsion bar when a predetermined or more external force acts on the input shaft 120 Torque is generated at 110.

본 실시예에 따른 토크 검출장치는 입력축(120)과 출력축(130)의 회전각도를 측정하고, 측정된 회전각도의 차이를 이용하여 토크를 측정한다.The torque detecting device according to the present embodiment measures the rotation angle of the input shaft 120 and the output shaft 130, and measures the torque by using the difference in the measured rotation angle.

상세히 설명하면, 입력축(120) 및 출력축(130)의 외주면 일측에는 외주면을 따라 제 1 및 제 2 치(齒)(123,133)가 각각 형성되고, 제 1 및 제 2 치(齒)(123,133)의 일측에는 제 1 및 제 2 회전각도 검출수단이 각각 마련된다.In detail, first and second teeth 123 and 133 are formed on one side of the outer circumferential surface of the input shaft 120 and the output shaft 130 along the outer circumferential surface, respectively. On one side, first and second rotation angle detection means are provided, respectively.

제 1 회전각도 검출수단은 제 1 기어(141), 제 1 마그네트(171) 및 제 1 센서(181)를 가지고, 제 2 회전각도 검출수단은 제 2 기어(145), 제 2 마그네트(175) 및 제 2 센서(185)를 가지는데, 제 1 및 제 2 회전각도 검출수단의 설치구조를 상세히 설명한다.The first rotation angle detecting means has a first gear 141, a first magnet 171, and a first sensor 181, and the second rotation angle detecting means has a second gear 145 and a second magnet 175. And having a second sensor 185, the installation structure of the first and second rotation angle detection means will be described in detail.

제 1 및 제 2 기어(141,145)는 제 1 및 제 2 치(123,133)에 각각 맞물려 제 1 및 제 2 치(123,133)와 연동한다. 제 1 및 제 2 기어(141,145)는 제 1 및 제 2 홀더(151,155)에 지지된 제 1 및 제 2 지지축(161,165)에 각각 지지된다. 그리하여, 입력축(120) 및 출력축(130)의 회전에 의하여 제 1 및 제 2 기어(141,145)가 각각 회전하면, 제 1 및 제 2 지지축(161,165)도 제 1 및 제 2 기어(141,145)와 각각 동일하게 회전한다.The first and second gears 141 and 145 mesh with the first and second teeth 123 and 133, respectively, and interlock with the first and second teeth 123 and 133. The first and second gears 141 and 145 are supported by the first and second support shafts 161 and 165 supported by the first and second holders 151 and 155, respectively. Thus, when the first and second gears 141 and 145 are rotated by the rotation of the input shaft 120 and the output shaft 130, the first and second support shafts 161 and 165 also rotate with the first and second gears 141 and 145. Each rotates the same.

그리고, 제 1 및 제 2 지지축(161,165)에는 제 1 및 제 2 마그네트(171,175)가 각각 설치되고, 제 1 및 제 2 홀더(151,155)에는 제 1 및 제 2 마그네 트(171,175)와 대향되게 제 1 및 제 2 센서(181,185)가 각각 설치된다. 제 1 및 제 2 마그네트(171,175)는 제 1 및 제 2 지지축(161,165)과 각각 동일하게 회전하고, 제 1 및 제 2 센서(181,185)는 제 1 및 제 2 마그네트(171,175)의 회전각도를 각각 감지한다. 이때, 제 1 및 제 2 센서(181,185)는 각각 로타리(Rotary) 홀(Hall) IC로 마련되고, 제 1 및 제 2 마그네트(171,175)는 2극 분할되는 것이 바람직하다.The first and second magnets 171 and 175 are installed on the first and second support shafts 161 and 165, respectively, and the first and second magnets 171 and 175 are opposed to the first and second magnets 171 and 175. First and second sensors 181 and 185 are installed, respectively. The first and second magnets 171 and 175 rotate in the same manner as the first and second support shafts 161 and 165, respectively, and the first and second sensors 181 and 185 rotate the rotation angles of the first and second magnets 171 and 175, respectively. Detect each. In this case, it is preferable that the first and second sensors 181 and 185 are each provided with rotary Hall ICs, and the first and second magnets 171 and 175 are divided into two poles.

외력에 의하여 입력축(120)이 회전하면, 입력축(120)의 회전력이 토션바(110)를 통하여 출력축(130)으로 전달되므로, 출력축(130)도 회전한다. 이때, 입력축(120)과 출력축(130)의 회전각도는 상이하다.When the input shaft 120 rotates due to an external force, since the rotational force of the input shaft 120 is transmitted to the output shaft 130 through the torsion bar 110, the output shaft 130 also rotates. In this case, the rotation angles of the input shaft 120 and the output shaft 130 are different.

그러면, 입력축(120) 및 출력축(130)의 제 1 및 제 2 치(123,133)에 각각 맞물린 제 1 및 제 2 기어(141,145)도 입력축(120) 및 출력축(130)과 각각 대응되게 회전하고, 제 1 및 제 2 기어(141,145)와 동일하게 제 1 및 제 2 마그네트(171,175)도 회전한다. 그리고, 제 1 및 제 2 센서(18,185)가 제 1 및 제 2 마그네트(171,175)의 회전각도를 각각 감지하여 차량의 제어부(미도시)로 송신하면, 상기 제어부는 제 1 마그네트(171)의 회전각도와 제 2 마그네트(175)의 회전각도의 차를 검출하여, 토크를 측정한다.Then, the first and second gears 141 and 145 respectively engaged with the first and second teeth 123 and 133 of the input shaft 120 and the output shaft 130 also rotate to correspond to the input shaft 120 and the output shaft 130, respectively. Like the first and second gears 141 and 145, the first and second magnets 171 and 175 also rotate. When the first and second sensors 18 and 185 detect the rotation angles of the first and second magnets 171 and 175, respectively, and transmit the detected angles to the controller (not shown) of the vehicle, the controller rotates the first magnet 171. The torque is measured by detecting the difference between the angle and the rotation angle of the second magnet 175.

그 후, 측정된 토크에 따라 적절한 보조 조작력을 출력축(130)에 제공하여, 운전자가 원활하게 스티어링 핸들을 조작할 수 있도록 한다.Thereafter, an appropriate auxiliary operating force is provided to the output shaft 130 according to the measured torque, so that the driver can operate the steering wheel smoothly.

본 실시예에 따른 토크 검출장치는 입력축(120)과 출력축(130)의 회전각도를 측정하고, 측정된 회전각도의 차를 이용하여 토크를 검출한다. 이때, 입력축(120)의 회전각도와 출력축(130)의 회전각도 차가 크면, 더욱 세분화되고 정확한 토크를 검출할 수 있으므로, 제 1 치 및 제 1 기어(123,141)와 제 2 치 및 제 2 기어(133,145)의 이빨의 비를 적절하게 조절하면 된다.The torque detecting device according to the present embodiment measures the rotation angle of the input shaft 120 and the output shaft 130, and detects torque by using the difference between the measured rotation angles. At this time, if the rotation angle of the input shaft 120 and the rotation angle of the output shaft 130 is large, the finer and more accurate torque can be detected, so that the first and first gears 123 and 141 and the second and second gears ( 133, 145) to adjust the ratio of the teeth appropriately.

이상에서 설명한 바와 같이, 본 발명에 따른 토크 검출장치는 차량의 스티어링 핸들과 연결된 입력축의 회전각도와 조향 바퀴와 연결된 출력축의 회전각도를 직접 측정하고, 회전각도의 차를 이용하여 토크를 검출한다. 그러므로, 온도 등과 같은 외부의 영향을 받지 않으므로 토크를 정확하게 검출할 수 있어 신뢰성이 향상된다.As described above, the torque detecting device according to the present invention directly measures the rotation angle of the input shaft connected to the steering wheel of the vehicle and the rotation angle of the output shaft connected to the steering wheel, and detects torque using the difference of the rotation angles. Therefore, since it is not influenced by external influences such as temperature, the torque can be detected accurately and the reliability is improved.

이상에서는, 본 발명의 일 실시예에 따라 본 발명을 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 변경 및 변형한 것도 본 발명에 속함은 당연하다.In the above, the present invention has been described in accordance with one embodiment of the present invention, but those skilled in the art to which the present invention pertains have been changed and modified without departing from the spirit of the present invention. Of course.

Claims (3)

스티어링 핸들에 의하여 회전하며 외주면에 제 1 치(齒)가 형성된 입력축;An input shaft rotated by a steering handle and having a first tooth formed on an outer circumferential surface thereof; 조향 바퀴측에 연결되고 외주면에 제 2 치(齒)가 형성된 출력축;An output shaft connected to the steering wheel side and having a second tooth formed on an outer circumferential surface thereof; 상기 입력축의 회전력을 상기 출력축으로 전달하는 토션바;A torsion bar for transmitting the rotational force of the input shaft to the output shaft; 상기 제 1 치와 맞물리는 제 1 기어, 상기 제 1 기어와 연동하여 회전하는 제 1 마그네트, 상기 제 1 마그네트의 회전각도를 감지하는 제 1 센서를 가지는 제 1 회전각도 검출수단;First rotation angle detection means having a first gear meshing with the first tooth, a first magnet rotating in conjunction with the first gear, and a first sensor sensing a rotation angle of the first magnet; 상기 제 2 치와 맞물리는 제 2 기어, 상기 제 2 기어와 연동하여 회전하는 제 2 마그네트, 상기 제 2 마그네트의 회전각도를 감지하는 제 2 센서를 가지는 제 2 회전각도 검출수단; 및Second rotation angle detection means having a second gear meshing with the second tooth, a second magnet rotating in conjunction with the second gear, and a second sensor sensing a rotation angle of the second magnet; And 상기 제 1 및 제 2 회전각도 검출수단으로부터 상기 제 1 및 제 2 마그네트의 회전각도를 송신받아 회전각도의 차를 계산하여 토크를 측정하는 제어부를 포함하는 토크 검출장치.And a controller which receives the rotation angles of the first and second magnets from the first and second rotation angle detection means, calculates a difference between the rotation angles, and measures torque. 제 1 항에 있어서,The method of claim 1, 상기 제 1 및 제 2 센서는 각각 로터리 홀 IC인 것을 특징으로 하는 토크 검출장치.And said first and second sensors are rotary hall ICs, respectively. 제 1 항에 있어서,The method of claim 1, 상기 제 1 및 제 2 마그네트는 각각 2극 분할된 것을 특징으로 하는 토크 검출장치.And the first and second magnets are divided into two poles, respectively.
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KR100936574B1 (en) * 2008-03-07 2010-01-13 엘에스전선 주식회사 Non-Contacting Torque Sensor For Measuring Twisting Angle and Absolute Angle
KR100936573B1 (en) 2008-03-07 2010-01-13 엘에스전선 주식회사 Non-Contacting Torque Sensor For Measuring Twisting Angle and Absolute Angle
CN101907501A (en) * 2010-07-02 2010-12-08 同济大学 Non-contact phase-difference type torque sensor
WO2022043252A1 (en) * 2020-08-26 2022-03-03 Thyssenkrupp Presta Ag Torque sensor unit with structured surface of the steering shafts

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100936574B1 (en) * 2008-03-07 2010-01-13 엘에스전선 주식회사 Non-Contacting Torque Sensor For Measuring Twisting Angle and Absolute Angle
KR100936573B1 (en) 2008-03-07 2010-01-13 엘에스전선 주식회사 Non-Contacting Torque Sensor For Measuring Twisting Angle and Absolute Angle
CN101907501A (en) * 2010-07-02 2010-12-08 同济大学 Non-contact phase-difference type torque sensor
WO2022043252A1 (en) * 2020-08-26 2022-03-03 Thyssenkrupp Presta Ag Torque sensor unit with structured surface of the steering shafts

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