KR0139671B1

KR0139671B1 - Rear wheel device for a vehicle

Info

Publication number: KR0139671B1
Application number: KR1019950022471A
Authority: KR
Inventors: 김대영; 김건상
Original assignee: 한승준; 기아자동차주식회사
Priority date: 1995-07-27
Filing date: 1995-07-27
Publication date: 1998-07-01
Also published as: KR970006050A

Abstract

본 발명은 자동차의 조향장치에 관한 것으로서, 조종안정성을 향상시키기 위해, 양단부가 양쪽 뒷바퀴(1)에 구동 가능하게 연결되는 작동축(10)과, 상기 작동축과 뒷바퀴 사이에 장치되어 상기 뒷바퀴에 작용되는 횡력을 감지하고 감지신호를 출력하는 로드셀(20)과, 상기 로드셀에서 발생되는 전기적인 신호를 입력받아 증폭하는 증폭기(30)와, 상기 증폭기에서 증폭된 가변적인 신호를 입력 받아 일정 특성곡선에 따른 일정 전압으로 연산처리하여 변환된 전압을 출력하는 리니어콘트롤러(40)와, 상기 리니어콘트롤러에서 출력되는 전압을 입력받아 설정된 기준전압과 비교하여 기준전압 이상시 제어신호를 출력하는 전압조정기(50)와, 상기 전압조정기에 전기적으로 제어 가능하게 연결되고 차체에 고정되어 상기 전압조정기에서 인가되는 전원에 의해 상기 작동축의 축방향 이동을 제어하는 액츄에이터(60)로 구성하며, 상기 액츄에이터는 작동유체가 저장되는 밀폐된 작동공간이 형성되어 상기 작동공간에 작동축(10)의 중간부가 축방향 미끄럼이 가능하게 장착되고 외부면이 차체에 고정되는 하우징(61)과, 상기 하우징의 내부 양측면과 상기 작동축의 양단부 외주면에 사이에 각기 탄력적으로 장착되는 복원스프링(63)과, 전압조정기(50)에 통전 가능하게 연결되고 상기 작동유체에 통전 가능하도록 장착되는 전압부가전극(51)으로 구성하여, 차량의 주행중 커브길이나 차선변경 등으로 앞바퀴를 조향하는 경우, 뒷바퀴(1)에 작용되는 횡력이 로드셀(20)에 의해 감지되고, 횡력의 크기에 따라 액츄에이터(60)가 작동축(10)을 통해 뒷바퀴(1)를 제어하여 동상조타하도록 하는 자동차의 후륜 동상 조향장치이다.The present invention relates to a steering apparatus of an automobile, in order to improve steering stability, an operating shaft (10) having both ends operably connected to both rear wheels (1), and installed between the operating shaft and the rear wheels to the rear wheels. A load cell 20 for sensing an applied lateral force and outputting a detection signal, an amplifier 30 for receiving and amplifying an electrical signal generated from the load cell, and a variable characteristic curve for receiving a variable signal amplified by the amplifier. Linear controller 40 for outputting the converted voltage by arithmetic processing to a predetermined voltage according to the voltage regulator for outputting the control signal when the reference voltage is exceeded by receiving the voltage output from the linear controller and the set reference voltage (50) And by a power source electrically connected to the voltage regulator and fixed to the vehicle body and applied from the voltage regulator. It consists of an actuator 60 for controlling the axial movement of the operating shaft, the actuator is formed in a closed working space in which the working fluid is stored so that the intermediate portion of the working shaft 10 in the working space is axial sliding The housing 61 is mounted and the outer surface is fixed to the vehicle body, the restoring spring 63 is elastically mounted between the inner both sides of the housing and the outer circumferential surface of both ends of the working shaft, and the voltage regulator 50 can be energized. The voltage unit is connected to and mounted to the working fluid so as to be energized so that when the front wheel is steered due to a curve road or lane change while the vehicle is running, the lateral force acting on the rear wheel 1 is the load cell 20. Detected by the, according to the magnitude of the lateral force actuator 60 is the rear wheel in-phase steering of the vehicle to control the in-phase steering by controlling the rear wheel (1) through the operating shaft (10).

Description

Rear wheel frostbite steering wheel of car

제1도는 본 발명의 전체 구성을 나타내는 구성도1 is a block diagram showing the overall configuration of the present invention

제2도는 본 발명의 액츄에이터를 나타내는 단면도2 is a cross-sectional view showing the actuator of the present invention

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

10:작동축20:로드셀10: working shaft 20: load cell

30:중폭기40:리니어콘트롤러30: Medium Aerator 40: Linear Controller

50:전압조정기51:전압부가전극50: voltage regulator 51: voltage addition electrode

60:액츄에이터61:하우징60: actuator 61: housing

62:베어링63:복원스프링62: bearing 63: restoring spring

본 발명은 자동차의 조향장치에 관한 것으로서, 특히 차량의 선회시 뒷바퀴에 발생되는 횡력을 상쇄하도록 하여, 조종안정성이 향상되도록 하는 자동차의 후륜 동상 조향장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus of a motor vehicle, and more particularly, to a rear wheel in-phase steering apparatus of a vehicle for canceling a lateral force generated in a rear wheel during turning of a vehicle, thereby improving steering stability.

일반적으로 자동차는, 조향핸들이 조향축에 일체로 회전되게 장치되고, 조향축에 조향기어가 구동 가능하게 연결되며, 조향기어가 타이로드를 통해 앞바퀴에 구동 가능하게 연결되어, 조향핸들을 좌우로 조작함에 따라 앞바퀴가 일정 비율로 좌우 회동되어 조향각이 가변되고, 앞바퀴의 조향에 따라 종속적으로 움직이는 양 뒷바퀴가 차동장치에 의해 상대적으로 회전수가 가감되어 각기 상이한 회전반경을 형성하며 조향되도록 되어 있다.In general, a vehicle is provided so that the steering wheel is integrally rotated on the steering shaft, the steering gear is operably connected to the steering shaft, and the steering gear is operably connected to the front wheel through the tie rod, and thus the steering wheel is operated left and right. Accordingly, the front wheel is rotated left and right at a constant ratio, and the steering angle is variable. Both rear wheels, which are dependent on the steering of the front wheel, are rotated by a differential device so that the number of rotations is relatively reduced to form a different radius of rotation.

이러한 자동차는 일정속도 이상으로 선회하면 주행관성에 의해 뒷바퀴의 타이어에 횡력이 집중적으로 발생하게 되어 안정성이 저하되고, 고속주행시 갑자스럽게 조향각을 크게 변경하는 경우는 안정성이 상실되어 차량이 전복되게 되는 문제점이 있었다.If the vehicle turns more than a certain speed, the lateral force is concentrated on the rear wheel tire due to the driving inertia, and the stability is lowered. If the steering angle is suddenly changed greatly during high-speed driving, the vehicle loses stability and the vehicle is overturned. There was this.

본 발명의 목적은 상기와 같은 종래의 문제점을 보완하기 위해, 운전상황에 따른 횡력검출신호를 입력받는 콘트롤러가 액츄에이터를 통해 뒷바퀴를 동상조타하도록 하여, 주행안정성이 향상되도록 하는 자동차의 후륜 동상 조향장치를 제공하는 데 있다.An object of the present invention, in order to supplement the conventional problems as described above, the controller receiving the lateral force detection signal according to the driving situation to the in-phase steering of the rear wheel through the actuator, the rear wheel in-phase steering device of the vehicle to improve the driving stability To provide.

이하 첨부된 조면에 의하여 본 발명의 기술적 사상을 상세히 설명하면 다음과 같다.Hereinafter, the technical spirit of the present invention will be described in detail with reference to the attached rough surfaces.

본 발명은 제1도와 제2도에 도시되는 바와 같이, 양단부가 양쪽 뒷바퀴(1)의 내측에 구동 가능하게 연결되는 작동축(10)과, 작동축(10)의 양단부와 뒷바퀴(1)에 사이에 장치되어 뒷바퀴(1)에 작용되는 횡력을 감지하고 감지신호를 미세한 전기적 신호로 출력하는 로드셀(load cell)(20)과, 로드셀(20)에서 발생되는 전기적인 신호를 입력받아 증폭하는 증폭기(30)와, 증폭기(30)에서 증폭된 가변적인 신호를 입력 받아 일정 특성곡선에 따른 일정 전압으로 연산처리하여 변환된 전압을 출력하는 리니어콘트롤러(linear controller)(40)와, 리니어콘트롤러(40)에서 출력되는 전압을 입력받아 설정된 기준전압과 비교하여 기준전압 이상에서 제어신호를 출력하는 전압조정기(voltage regulator)(50)와, 전압조정기(50)에 전기적으로 제어 가능하게 연결되고 차체에 고정되어 전압조정기(50)에서 인가되는 전원에 의해 작동축(10)의 축방향 이동을 제어하는 액츄에이터(60)로 구성함을 그 기술적 구성상의 기본 특징으로 한다.As shown in FIG. 1 and FIG. 2, the present invention has an operating shaft 10 having both ends operatively connected to the inside of both rear wheels 1, and both ends and rear wheels 1 of the operating shaft 10. FIG. A load cell 20 that senses the lateral force acting on the rear wheel 1 and outputs a detection signal as a fine electrical signal, and an amplifier that receives and amplifies an electrical signal generated from the load cell 20. 30, a linear controller 40 for receiving a variable signal amplified by the amplifier 30 and calculating and outputting the converted voltage by a predetermined voltage according to a predetermined characteristic curve, and a linear controller 40 ) Is connected to the voltage regulator 50 and outputs a control signal above the reference voltage and receives the voltage output from the output voltage, and is electrically controllable to the voltage regulator 50 and fixed to the vehicle body. Voltage adjustment It is a basic feature of the technical configuration that the configuration of the actuator 60 for controlling the axial movement of the operating shaft 10 by the power applied from the machine (50).

이와같이 구성되는 본 발명은, 차량이 주행중 차선변경을 하거나 커브길을 운행하는 경우 뒷바퀴(1)에 작용되는 횡력이 로드셀(20)에 감지되고, 로드셀(20)에 감지된 감지신호가 증폭기(30)에서 증폭된 후 리니어콘트롤러(40)로 입력되게 되며, 리니어콘트롤러(40)에서 다변적인 전기적신호를 입력받아 설정된 특성곡선에 따라 연산처리하여 일정 리니어전압으로 출력한다. 또한, 전안조정기(50)에서 리니어전압을 인가받아 설정된 일정 전압을 이상이면 액츄에이터(60)에 전기적인 제어신호를 인가하여 작동축(120)이 횡력과 같은 방향으로 이동되어 뒷바퀴(1)가 조향되도록 한다.According to the present invention configured as described above, when the vehicle changes lanes while driving or runs a curved road, the lateral force applied to the rear wheel 1 is sensed by the load cell 20, and the detection signal detected by the load cell 20 is an amplifier 30. After being amplified by the linear controller 40, it is input to the linear controller 40, and receives a multivariable electrical signal from the linear controller 40, and arithmetic processes it according to the set characteristic curve and outputs it as a constant linear voltage. In addition, when the linear voltage is applied from the power regulator 50 and the set voltage is higher than the set voltage, the electric control signal is applied to the actuator 60 so that the operating shaft 120 is moved in the same direction as the lateral force so that the rear wheel 1 is steered. Be sure to

여기에서, 액츄에이터(60)는 제2도에 도시되는 바와 같이, 내부에 일정내경의 밀폐된 작동공간이 형성되어 내부에 작동유체가 저장되고 상기 작동공간 내주면 일정부위에 스토퍼 기능을 하는 던턱(61a)이 동심원상으로 형성되는 하우징(61)이 차체에 고정되고, 단턱(61a)에 결려 이동이 제한되도록 외주면에 걸림턱(10a)이 돌출되게 형성되는 작동축(10)이 하우징(61)의 작동공간 내부에 축방향이동이 가능하게 장착되며, 하우징(61)의 양단부 내주면과 작동축(10)의 외주면 사이에 베어링(62)이 기밀하게 장착된다. 또한, 작동축(10)의 양단부 외주면에 복원스프링(63)이 장착되어 작동축(10)의 걸림턱(10a)과 하우징(61)의 베어링(62)부에 복원스프링(63)의 양단부가 탄지되고, 전압조정기(50)에 통전 가능하게 연결되는 전압부가전극(51)이 하우징(61)의 작동공간에 저장되는 작동유체에 통전 가능하도록 장착된다.Here, as shown in FIG. 2, the actuator 60 has a sealed working space having a predetermined inner diameter formed therein so that a working fluid is stored therein and a stopper 61a having a stopper function at a predetermined portion of the working space. The housing 61 is formed in a concentric circle is fixed to the vehicle body, the operation shaft 10 is formed so that the locking jaw (10a) protrudes on the outer peripheral surface so that movement is limited to the step (61a) of the housing 61 An axial movement is mounted inside the working space, and the bearing 62 is hermetically mounted between the inner circumferential surfaces of both ends of the housing 61 and the outer circumferential surface of the operating shaft 10. In addition, the restoring springs 63 are mounted on the outer circumferential surfaces of both ends of the actuating shaft 10 so that both ends of the restoring springs 63 are provided at the engaging jaw 10a of the actuating shaft 10 and the bearing 62 of the housing 61. The voltage portion, which is fingered and electrically connected to the voltage regulator 50, is mounted to enable the electricity to be supplied to the working fluid stored in the working space of the housing 61.

한편, 작동유체는 부전도성 오일에 분극화될 수 있는 작은 입자를 분산시킨 형태로 외부 전기장의 영향하에 놓일 때에 점도가 변하는 유변학적인 성질을 같는 전기가변형유체(electro-rheological fluid)를 사용하여, 전기장의 세기에 따라 유체의 특성이 변하도록하며, 작동축(10)은 걸림턱(10a) 중간부에 축방향으로 관통구멍을 형성하여 작동유체의 유동이 원활화도록 함이 바람직하다.On the other hand, the working fluid is an electro-rheological fluid having a rheological property that changes in viscosity when placed under the influence of an external electric field in the form of dispersing small particles that can be polarized in a non-conductive oil. The characteristics of the fluid change according to the intensity, and the working shaft 10 preferably forms a through hole in the axial direction in the middle of the locking step 10a to smooth the flow of the working fluid.

이와같이 구성되는 액츄에이터는, 전압조정기(50)에서 전압부가전극(51)에 전원이 인가되면, 작동유체의 점도가 변화되어 최초에; 발생된 횡력에 대해 적절한 저항력이 나타나도록되어, 뒷바퀴(1)에 일정량 이상의 외력이 발생했을 때, 작동축(10)이 외력과 같은 방향으로 미끄로지도록 하며, 로드셀(20)에 감지되는 횡력이 사라지면 전압조정기(50)로부터 작동유체에 가해지는 전압이 극히 작아지게 되어 작동유체가 초기상태로 되고, 복원스프링(63)의 복원력에 의해 작동축(10)이 복원되도록 한다. 또한, 하우징(61)의 단턱(61a)은 횡력이 과도하게 발생되는 경우, 작동축(10)의 걸림턱(10a)이 걸리도록 하여 변위를 제한하도록 한다.The actuator configured as described above, when the voltage is applied to the electrode 51 in the voltage regulator 50, the viscosity of the working fluid is changed first; Appropriate resistance to the generated lateral force is to appear, when a certain amount of external force is generated on the rear wheel 1, the operating shaft 10 is slid in the same direction as the external force, and the lateral force detected by the load cell 20 When disappearing, the voltage applied to the working fluid from the voltage regulator 50 is extremely small, the working fluid is in the initial state, the working shaft 10 is restored by the restoring force of the restoring spring (63). In addition, when the lateral force is excessively generated, the stepped portion 61a of the housing 61 allows the locking step 10a of the operating shaft 10 to be caught to limit the displacement.

이와같이 구성되고 작동되는 본 발명은, 차량의 주행중 커브길이나 차선변경 등으로 앞바퀴를 조향하는 경우, 뒷바퀴(1)에 작용되는 횡력이 로드셀(20)에 의해 감지되어 콘트롤러에 입력되고, 횡력의 크기에 따른 콘트롤러의 제어신호에 액츄에이터(60)가 작동축(10)을 통해 뒷바퀴(1)를 제어하여 동상조타하므로, 차량의 주행안정성을 향상시키고, 뒷바퀴에 전달될 수 있는 충격을 감쇄시키는 효과를 갖도록 한다.According to the present invention configured and operated as described above, when steering the front wheel by driving a curve road or changing lanes, the lateral force applied to the rear wheel 1 is sensed by the load cell 20 and input to the controller, and the magnitude of the lateral force is applied. Actuator 60 controls the rear wheel 1 through the operating shaft 10 in the control signal of the controller according to the in-phase steering, thereby improving the driving stability of the vehicle, attenuating the shock that can be transmitted to the rear wheel. Have it.

이상에서 살펴본 바와 같이, 본 발명은 운전상황에 따른 횡력검출신호를 입력받는 콘트롤러가 액츄에이터를통해 뒷바퀴를 동상조타하므로, 주행안정성이 향상되도록 하는 매우 유용한 것이다.As described above, the present invention is very useful to improve the driving stability because the controller receiving the lateral force detection signal according to the driving situation is in phase steering the rear wheel through the actuator.

Claims

An operating shaft having both ends operatively connected to both rear wheels, a load cell mounted between the operating shaft and the rear wheel to sense a lateral force applied to the rear wheel and outputting a detection signal as an electrical signal, and the electricity generated by the load cell An amplifier that receives and amplifies a typical signal, a linear controller that receives a variable signal amplified by the amplifier, arithmetic processes to a predetermined voltage according to a predetermined characteristic curve, and outputs the converted voltage, and a voltage output from the linear controller. A voltage regulator for outputting a control signal when the reference voltage is exceeded compared to the set reference voltage input, and the axial direction of the operating shaft by a power connected to the voltage regulator electrically controlled and fixed to the vehicle body applied from the voltage regulator Characterized in that it consists of an actuator to control the movement Steering Wheel statue of the car.

According to claim 1, Actuator is a housing in which a closed working space in which the working fluid is stored is formed so that the intermediate portion of the operating shaft is axially movable and the outer surface is fixed to the vehicle body in the working space, the interior of the housing Resilient springs are elastically mounted between both sides and outer peripheral surfaces of both ends of the working shaft, and a voltage regulator and a voltage portion mounted to enable energization of the working fluid.

3. The working fluid of claim 2 employs an electro-rheological fluid having a rheological property that changes in viscosity when placed under the influence of an external electric field in the form of dispersed small particles that can be polarized in a nonconductive oil. Hue statue steering system of the car, characterized in that.

3. The rear wheel in-phase steering apparatus of claim 2, wherein the housing is formed in a concentric circle with a stopper function step restricting movement of the operating shaft on a predetermined portion of the inner circumferential surface of the working space.