KR100270769B1 - Torque sensing apparatus for electronic controlled power steering system for motor vehicle - Google Patents

Torque sensing apparatus for electronic controlled power steering system for motor vehicle Download PDF

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Publication number
KR100270769B1
KR100270769B1 KR1019970066272A KR19970066272A KR100270769B1 KR 100270769 B1 KR100270769 B1 KR 100270769B1 KR 1019970066272 A KR1019970066272 A KR 1019970066272A KR 19970066272 A KR19970066272 A KR 19970066272A KR 100270769 B1 KR100270769 B1 KR 100270769B1
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KR
South Korea
Prior art keywords
belt
torque
shaft
rollers
pulley
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KR1019970066272A
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Korean (ko)
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KR19990047756A (en
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송준규
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밍 루
주식회사만도
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Priority to KR1019970066272A priority Critical patent/KR100270769B1/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
    • 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
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028—Force sensors associated with force applying means
    • G01L5/0042—Force sensors associated with force applying means applying a torque
    • 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
    • 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)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Power Steering Mechanism (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

PURPOSE: A torque sensing apparatus is provided to prevent wire of torque sensor from being twisted by avoiding the torque sensor from being directly mounted to the steering handle. CONSTITUTION: In an electronic controlled power steering system where a pulley(60) of a motor shaft and a pulley(5) of a steering handle shaft are interconnected through a belt(7) so as to transfer the power generated from a motor to the shaft of steering handle, a torque sensing apparatus comprises a pair of rollers tightly contacting with each other by a tension spring(65) at both sides of the belt; guide members for permitting rollers to move only in the direction perpendicular to the lengthwise direction of the belt; and a potentiometer(9) for detecting the torque amount by sensing the tensile force of the belt through the movement of rollers.

Description

차량용 전동 파워스티어링 장치에 있어서의 토오크 감지장치Torque Sensing Device in Automotive Electric Power Steering System

본 발명은 차량용 전동 파워스티어링 장치(EPS:Electronic Controlled Power Steering)에 있어 조향장치의 구동축과 부하측 사이에서 발생하는 토오크 량을 센싱하는 토오크 감지장치에 관한 것으로, 토오크 감지부를 핸들 축에 장착하지 아니하고서도 별도의 장치에 의해 간편하게 토오크를 감지할 수 있도록 한 것이다.The present invention relates to a torque sensing device for sensing an amount of torque generated between a drive shaft and a load side of a steering apparatus in an electronic controlled steering device (EPS) for a vehicle, without the torque sensing unit being mounted on the handle shaft. Torque can be easily detected by a separate device.

차량의 주행 또는 정지 상태에서 조향핸들을 회전시킬 경우 노면에 접촉되는 바퀴도 함께 회전하게 되는데, 이때 바퀴는 상대적으로 노면과의 마찰로 인하여 조향핸들을 조작할 때 큰 부하가 발생한다.When the steering wheel is rotated while the vehicle is in a driving or stopped state, the wheel contacting the road surface also rotates, and a large load is generated when the wheel is operated due to the friction with the road surface.

따라서 종래에는 조향장치에 차량용 전동 파워스티어링 장치를 부가하여 조향핸들과 바퀴 사이에서 발생하는 토오크 량을 센싱하여 그 편차만큼 동력 수단을 이용하여 바퀴를 더 회전시키는데 필요한 보타력을 발생시키도록 구성되고 있다.Therefore, in the related art, an electric power steering device for a vehicle is added to the steering device to sense an amount of torque generated between the steering wheel and the wheel and to generate the steering force required to further rotate the wheel by the power means by the deviation. .

하지만 종래에는 도1에 나타낸 바와 같이 조향핸들(1)에 토오크센서(2)가 장착되는 일체형으로 구성함으로써 조행 핸들(1)을 돌릴 때 부하가 발생하면 축1(3)과 축2(4) 사이에서 발생된 토오크를 센싱하는 토오크센서(2)가 함께 회전하게 되어 토오크센서(2)의 배선이 꼬이는 문제점이 있고, 배선이 꼬이지 않게 하기 위해서는 특별히 고안된 유성치차를 사용하므로써 구조가 복잡하다는 등의 문제점이 있었다.However, in the related art, as shown in FIG. 1, when the steering wheel 1 is rotated by an integral type in which the torque sensor 2 is mounted on the steering wheel 1, if a load is generated, the shaft 1 (3) and the shaft 2 (4) The torque sensor 2 sensing the torque generated between the two is rotated together, so that the wiring of the torque sensor 2 is twisted, and the structure is complicated by using a specially designed planetary gear to prevent the wiring from twisting. There was a problem.

따라서 본 발명은 상기한 바와 같은 종래의 문제점을 해소하기 위해, 조향핸들에서 발생하는 토오크 측정이 조향핸들에 고정되는 토오크센서가 아니고, 조향핸들과는 별개로 구성된 포텐셔미터를 이용하여 감지할 수 있도록 된 토오크 감지장치를 제공함으로써 조향핸들에 직접 토오크센서를 장착하는데서 비롯되었던 토오크센서의 배선이 꼬이는 것을 사전 방지함과 아울러 구조의 단순화를 꾀하고자 하는 것인 바, 이를 첨부된 예시 도면을 참고하여 그 구성 및 작용 효과 등을 보다 구체적으로 설명하면 다음과 같다.Therefore, the present invention is to solve the conventional problems as described above, the torque measurement generated in the steering wheel is not a torque sensor fixed to the steering wheel, it is possible to detect using a potentiometer configured separately from the steering wheel By providing a torque sensing device to prevent the twisting of the torque sensor wiring caused by mounting the torque sensor directly on the steering wheel and to simplify the structure, the configuration thereof with reference to the accompanying example drawings. It will be described in more detail and the effect and the like as follows.

도1은 종래 전동EPS의 계략적인 구성을 나타낸 참고도,1 is a reference diagram showing a schematic configuration of a conventional electric EPS,

도2는 본 발명의 계략적인 구성을 나타낸 예시도,2 is an exemplary view showing a schematic configuration of the present invention;

도3은 본 발명이 적용된 조향핸들의 예시도,3 is an exemplary view of a steering wheel to which the present invention is applied;

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1 ; 조향핸들 2 : 토오크센서One ; Steering wheel 2: torque sensor

5,60: 풀리 6 : 모터5,60: pulley 6: motor

7 : 타이밍벨트 65: 인장스프링7: Timing Belt 65: Tension Spring

70: 장력조절부 9 : 포텐셔미터70: tension control unit 9: potentiometer

이를 첨부된 예시 도면을 참고하여 그 구성 및 작용 효과 등을 보다 구체적으로 설명하면 다음과 같다.With reference to the accompanying drawings illustrating the configuration and operation effects, etc. in more detail as follows.

도2에서와 같이 본 발명은 모터의 동력을 조향핸들(1) 축(10)에 전달하는 차량용 전동 파워스티어링 장치에 있어서, 상기 조향핸들(1)이 고정되는 축(10)에 치차형의 풀리(5)를 고정하고, 상기 풀리(5)에는 도3에 나타낸 바와 같이 모터(6)의 치차형 풀리(60)에 감겨지는 타이밍벨트(7)로 연결하여 모터(6)와 함께 풀리(5)가 연동하도록 되고, 상기 타이밍벨트(7)의 장력을 부여하는 장력 조절부(70)와 인장스프링(65) 및 상기 타이밍벨트(7)에 작용하는 인장력에 대한 토오크를 검출하는 포텐셔미터(9)를 포함하는 구성으로 되고 있다.As shown in FIG. 2, the present invention is a vehicle electric power steering apparatus that transmits power of a motor to a steering wheel shaft 10, and a gear pulley on a shaft 10 on which the steering wheel 1 is fixed. (5) and the pulley (5) is connected to the pulley (5) with a timing belt (7) wound around the toothed pulley (60) of the motor (6) as shown in FIG. ) Is interlocked, and the potentiometer 9 which detects the torque for the tension force acting on the tension control unit 70 and the tension spring 65 and the timing belt 7 to impart the tension of the timing belt (7). It has been configured to include.

이때, 상기한 장력 조절부(70)는 타이밍벨트(7)의 양측 중단에 밀착시킨 한 쌍의 롤러(71)(72)와, 이들 롤러의 사이에 연결한 상기 인장스프링(65)과, 상기 롤러들의 축에 연결되어 이 롤러들이 벨트의 길이 방향에 대해 교차하는 방향으로만 왕복 이동하도록 단속하는 가이드수단(73)(74)으로 이루어 진다.At this time, the tension control unit 70 is a pair of rollers (71) 72 in close contact with both ends of the timing belt (7), the tension spring (65) connected between these rollers, and Guide means 73 and 74 are connected to the axes of the rollers and intermittently so as to reciprocate only in the direction in which the rollers intersect with respect to the longitudinal direction of the belt.

이와 같이 구성된 본 발명의 동작을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.

먼저 조향핸들(1) 축(10)에 고정되는 풀리(5)와 모터(6)의 풀리(60)는 단일 타이밍벨트(7)로 연결되고 있어 상기 타이밍벨트(7)에 작용하는 인장력은 조향핸들(1)에서 발생하는 조향 토오크에 비례한다.First, the pulley 5 fixed to the steering wheel 1 shaft 10 and the pulley 60 of the motor 6 are connected by a single timing belt 7 so that the tensile force acting on the timing belt 7 is steering. It is proportional to the steering torque occurring at the handle 1.

따라서 조향핸들(1)에 힘을 가하면 즉, 조향핸들(1)을 회전시키면 타이밍 벨트(7)에는 텐션이 발생하고, 이때 발생된 텐션의 양에 비례하게 장력조절부(70)의 롤러(71)(72)가 가이드수단(73)(74)의 안내를 받아 상, 하 방향으로만 왕복 이동하게 된다.Therefore, when a force is applied to the steering wheel 1, that is, when the steering wheel 1 is rotated, tension is generated in the timing belt 7, and the roller 71 of the tension adjusting unit 70 is proportional to the amount of tension generated. 72 is guided by the guide means 73 and 74 to reciprocate only in the up and down directions.

이처럼 장력조절부(70)의 롤러(71)(72)가 상하로 이동하게 됨에 따라 이와 함께 연동하는 포텐셔미터(9)의 길이가 변하게 되고, 결국 포텐셔미터(9)의 길이 변화량에 따라 발생되는 전압 또한 상대적으로 변화하게 된다.As the rollers 71 and 72 of the tension control unit 70 move up and down as described above, the length of the potentiometer 9 interlocking with it changes, so that the voltage generated according to the length variation of the potentiometer 9 also changes. Will change relatively.

이때의 변화량을 측정하면 현재 조향핸들(1)에서 발생되는 토오크와 토오크의 방향을 산출해 낼 수 있게 된다.By measuring the change amount at this time, it is possible to calculate the torque and the direction of the torque generated in the current steering wheel (1).

이러한 구성으로 된 본 발명에 의하면, 모터의 동력을 핸들 축에 전달함에 있어 조향핸들에서 발생하는 토오크 량을 토오크센서가 아닌 타이밍벨트에 발생하는 텐션량에 따라 이동되는 장력조절부의 이동 거리의 계산에 의한 방식을 통해 포텐셔미터가 토오크를 계산함으로써 조향핸들에 직접 토오크센서를 장착하는데서 비롯되었던 토오크센서의 배선이 꼬이는 현상을 사전 예방할 수 있게 되는 이점이 있다.According to the present invention having such a configuration, in the transmission of the power of the motor to the handle shaft, the amount of torque generated by the steering wheel is calculated in accordance with the amount of tension generated in the timing belt, not the torque sensor. In this way, the potentiometer calculates the torque, thereby preventing the twisting of the torque sensor wiring caused by mounting the torque sensor directly on the steering wheel.

또한, 조향핸들에는 토오크센서를 고정하지 않음으로써 구조가 단순화되는 등의 효과가 있다.In addition, there is an effect that the structure is simplified by not fixing the torque sensor to the steering wheel.

Claims (1)

모터의 동력을 조향핸들의 축에 전달하기 위해 모터축의 풀리(60)와 조향핸들 축의 풀리(5)를 벨트(7)로 연결한 전동 파워 스티어링 장치에 있어서, 상기한 벨트(7)는 타이밍 벨트로 하고, 벨트의 중단 양측에서 인장스프링(65)에 의해 밀착되는 한 쌍의 롤러(71)(72)와, 상기 롤러를 벨트의 길이 방향에 대해 직교하는 방향으로만 이동할 수 있도록 허용하는 가이드수단(73)(74)과, 상기 롤러의 움직임을 통해 벨트의 장력을 감지하여 토오크량을 검출하는 포텐셔미터(9)로 구성된 것을 특징으로 하는 차량용 전동 파워 스티어링 장치에 있어서의 토오크 감지장치.In the electric power steering apparatus in which the pulley 60 of the motor shaft and the pulley 5 of the steering handle shaft are connected by the belt 7 to transmit the power of the motor to the shaft of the steering handle, the belt 7 is a timing belt. And a pair of rollers 71 and 72 in close contact with the tension spring 65 on both sides of the belt suspension, and guide means for allowing the rollers to move only in a direction perpendicular to the longitudinal direction of the belt. And a potentiometer (9) for detecting torque by detecting tension of the belt through the movement of the roller (73) and (74).
KR1019970066272A 1997-12-05 1997-12-05 Torque sensing apparatus for electronic controlled power steering system for motor vehicle KR100270769B1 (en)

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KR1019970066272A KR100270769B1 (en) 1997-12-05 1997-12-05 Torque sensing apparatus for electronic controlled power steering system for motor vehicle

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KR100270769B1 true KR100270769B1 (en) 2001-03-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101975990B1 (en) 2018-12-14 2019-05-07 송영순 Stand-type lighting fixtures of traditional patterns and flower decoration

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102325798B1 (en) * 2015-09-11 2021-11-12 주식회사 만도 Electric Power Steering Apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01131423A (en) * 1987-11-17 1989-05-24 Agency Of Ind Science & Technol Torque sensor for wrapping power transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01131423A (en) * 1987-11-17 1989-05-24 Agency Of Ind Science & Technol Torque sensor for wrapping power transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101975990B1 (en) 2018-12-14 2019-05-07 송영순 Stand-type lighting fixtures of traditional patterns and flower decoration

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