KR20140026927A - Electric power steering system of vehicle - Google Patents

Electric power steering system of vehicle Download PDF

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Publication number
KR20140026927A
KR20140026927A KR1020120092879A KR20120092879A KR20140026927A KR 20140026927 A KR20140026927 A KR 20140026927A KR 1020120092879 A KR1020120092879 A KR 1020120092879A KR 20120092879 A KR20120092879 A KR 20120092879A KR 20140026927 A KR20140026927 A KR 20140026927A
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South Korea
Prior art keywords
input shaft
generating member
torsion
shaft
support block
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KR1020120092879A
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Korean (ko)
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KR101596080B1 (en
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오재문
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주식회사 만도
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/166—Means changing the transfer ratio between steering wheel and steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D3/00—Steering gears
    • B62D3/02—Steering gears mechanical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The present invention relates to an electric power steering system of a vehicle. According to an embodiment of the present invention, a torsion generating member operates for a torsion spring of a conventional torsion bar to simplify a structure. Disclosed is the electric power steering system of a vehicle including an input axis; an output axis; and the torsion generating member.

Description

자동차의 전동식 조향장치{Electric power steering system of vehicle}Electric power steering system of a vehicle

본 발명은 자동차의 전동식 조향장치에 관한 것으로, 보다 상세하게는 종래 토션바의 비틀림 스프링 역할을 토션발생부재가 담당하도록 함으로써, 구조를 간단하게 할 수 있는 자동차의 전동식 조향장치에 관한 것이다.The present invention relates to an electric steering apparatus of an automobile, and more particularly, to an electric steering apparatus of an automobile which can simplify the structure by allowing the torsion generating member to play a role of a torsion spring of a conventional torsion bar.

도 1은 종래 자동차의 전동식 조향장치의 조향축 일부를 나타낸 단면도이다.1 is a cross-sectional view showing a part of a steering shaft of an electric steering apparatus of a conventional vehicle.

도 1에 도시된 바와 같이, 종래 자동차의 전동식 조향장치의 조향축은 하부 조향축(110) 및 하부 조향축(110)과 결합되는 상부 조향축(미도시)으로 구성되며, 이들이 결합되어 동일한 중심축에 정렬되어 상부 조향축(미도시)은 조향휠(미도시)과 연결되고, 입력축(115)은 출력축(120)에 연결되어 조향휠(미도시)의 조향력을 전달하게 되어 있다.As shown in Figure 1, the steering shaft of the electric steering apparatus of the conventional vehicle is composed of an upper steering shaft (not shown) coupled with the lower steering shaft 110 and the lower steering shaft 110, they are combined to the same central axis The upper steering shaft (not shown) is aligned with the steering wheel (not shown), and the input shaft 115 is connected to the output shaft 120 to transmit steering force of the steering wheel (not shown).

하부 조향축(110)의 일단은 입력축(115)에 삽입되어 입력축(115) 및 토션바(150)와 핀(125)에 의해 결합된다.One end of the lower steering shaft 110 is inserted into the input shaft 115 and is coupled by the input shaft 115, the torsion bar 150, and the pin 125.

또한, 감속기(140)는 모터(130)와 결합된 웜(143)과 이에 치합되는 웜휠(141)이 출력축(120)의 외주에 삽입되어 전자제어장치로부터 신호를 받아 조향력을 보조하게 되어 있다.In addition, the speed reducer 140 has a worm 143 coupled to the motor 130 and a worm wheel 141 engaged therewith to be inserted into the outer circumference of the output shaft 120 to receive a signal from the electronic controller to assist the steering force.

한편, 토션바(150)는 입력축(115)과 출력축(120)의 내부에서 입력축(115), 출력축(120)과 각각 결합되며, 조향축(110)의 회전시 입력축(120)과 함께 회전되어 비틀리게 되는 일종의 비틀림 스프링 역할을 하는데, 입력축(115)과 출력축(120) 사이의 상대적인 비틀림 양은 토크센서(125)로 계측되어 전자제어장치로 보내지며, 이에 따라 전자제어장치는 제어 신호를 발생하여 감속기(140)의 보조 조향력 발생을 제어한다.Meanwhile, the torsion bar 150 is coupled to the input shaft 115 and the output shaft 120 in the input shaft 115 and the output shaft 120, respectively, and rotates together with the input shaft 120 when the steering shaft 110 is rotated. It acts as a kind of torsion spring that is twisted, and the relative amount of torsion between the input shaft 115 and the output shaft 120 is measured by the torque sensor 125 and sent to the electronic controller, whereby the electronic controller generates a control signal. The generation of the auxiliary steering force of the reducer 140 is controlled.

그러나 이러한 구조의 종래 조향축에서 비틀림 스프링 역할을 하는 토션바는, 토션바를 제조하고 가공하는 공정과 입력축 및 출력축에 핀으로 고정하는 조립 공정 등이 번거롭고, 이에 따라 생산성 저하 및 관련 비용이 증가하는 문제점이 있었으며, 토션바의 강성 튜닝이 어려운 문제점이 있었다.However, the torsion bar serving as a torsion spring in the conventional steering shaft of such a structure is cumbersome in the process of manufacturing and processing the torsion bar and the assembling process of pinning to the input shaft and the output shaft, thereby reducing productivity and related costs. There was a problem, the stiffness tuning of the torsion bar was difficult.

본 발명은 전술한 배경에서 안출된 것으로, 종래 토션바의 비틀림 스프링 역할을 토션발생부재가 담당하도록 함으로써, 구조를 간단하게 할 수 있는 자동차의 전동식 조향장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above-described background, and has an object to provide an electric steering apparatus for a vehicle that can simplify the structure by allowing the torsion generating member to play a role of a torsion spring of a conventional torsion bar.

또한, 종래 토션바를 삭제하고 입력축의 돌출부 외주면에 형성된 지지블럭과 출력축의 삽입홈 사이에 토션발생부재를 삽입함으로써, 토션바 제작 및 조립에 의한 비용을 절감할 수 있는 자동차의 전동식 조향장치를 제공하는데 그 목적이 있다.In addition, by removing the conventional torsion bar and inserting the torsion generating member between the support block formed on the outer peripheral surface of the projection shaft of the input shaft and the insertion groove of the output shaft, to provide an electric steering apparatus of a vehicle that can reduce the cost of the torsion bar manufacturing and assembly. The purpose is.

또한, 토션발생부재의 재질 및 형상 변형을 통해 토션발생부재의 강성 튜닝을 자유롭게 할 수 있는 자동차의 전동식 조향장치를 제공하는데 그 목적이 있다.In addition, an object of the present invention is to provide an electric steering apparatus of a vehicle that can freely tune the rigidity of the torsion generating member by modifying the material and shape of the torsion generating member.

본 발명의 목적은 여기에 제한되지 않으며, 언급되지 않은 또 다른 목적들은 아래의 기재로부터 통상의 기술자에게 명확하게 이해될 수 있을 것이다.The objects of the present invention are not limited thereto, and other objects not mentioned may be clearly understood by those skilled in the art from the following description.

본 발명의 일 실시예에 따르면, 조향축과 연결되어 회전력을 전달받는 입력축; 입력축이 삽입되어 결합되는 출력축; 및 입력축과 출력축의 결합부위에 구비되어 입력축의 회전시 복원력을 발생시키는 토션발생부재를 포함하는 것을 특징으로 하는 자동차의 전동식 조향장치가 제공될 수 있다.According to one embodiment of the invention, the input shaft is connected to the steering shaft receives a rotational force; An output shaft to which the input shaft is inserted and coupled; And a torsion generating member provided at a coupling portion of the input shaft and the output shaft to generate a restoring force when the input shaft is rotated.

본 발명의 실시예에 의하면, 종래 토션바의 비틀림 스프링 역할을 토션발생부재가 담당하도록 함으로써, 구조를 간단하게 할 수 있는 효과가 있게 된다.According to the embodiment of the present invention, the torsion generating member plays the role of the torsion spring of the conventional torsion bar, so that the structure can be simplified.

또한, 종래 토션바를 삭제하고 입력축의 돌출부 외주면에 형성된 지지블럭과 출력축의 삽입홈 사이에 토션발생부재를 삽입함으로써, 토션바 제작 및 조립에 의한 비용을 절감할 수 있는 효과가 있다.In addition, by removing the conventional torsion bar and inserting the torsion generating member between the support block formed on the outer peripheral surface of the protrusion of the input shaft and the insertion groove of the output shaft, it is possible to reduce the cost of the torsion bar production and assembly.

또한, 토션발생부재의 재질 및 형상 변형을 통해 토션발생부재의 강성 튜닝을 자유롭게 할 수 있는 효과가 있다.In addition, through the deformation of the material and shape of the torsion generating member there is an effect that can freely tune the rigidity of the torsion generating member.

도 1은 종래 자동차의 전동식 조향장치의 조향축 일부를 나타낸 단면도이다.
도 2는 본 발명의 실시예에 따른 자동차의 전동식 조향장치의 입력축과 출력축의 분해사시도이다.
도 3과 도 4는 도 2의 입력축과 출력축 사이에서 토션발생부재의 작동예를 설명하기 위한 도면이다.1 is a cross-sectional view showing a part of a steering shaft of an electric steering apparatus of a conventional vehicle.
2 is an exploded perspective view of an input shaft and an output shaft of an electric steering apparatus of a vehicle according to an exemplary embodiment of the present invention.
3 and 4 are views for explaining an operation example of the torsion generating member between the input shaft and the output shaft of FIG.

도 2는 본 발명의 실시예에 따른 자동차의 전동식 조향장치의 입력축과 출력축의 분해사시도이다.2 is an exploded perspective view of an input shaft and an output shaft of an electric steering apparatus of a vehicle according to an exemplary embodiment of the present invention.

도 3과 도 4는 도 2의 입력축과 출력축 사이에서 토션발생부재의 작동예를 설명하기 위한 도면이다.3 and 4 are views for explaining an operation example of the torsion generating member between the input shaft and the output shaft of FIG.

이들 도면들에 도시된 바와 같이, 본 발명의 실시예에 따른 자동차의 전동식 조향장치는 조향축(미도시)과 연결되어 회전력을 전달받는 입력축(115); 입력축(115)이 삽입되어 결합되는 출력축(120); 및 입력축(115)과 출력축(120)의 결합부위에 구비되어 입력축(115)의 회전시 복원력을 발생시키는 토션발생부재(230)를 포함하는 것을 특징으로 한다.As shown in these figures, the electric steering apparatus of the vehicle according to the embodiment of the present invention is connected to a steering shaft (not shown) input shaft 115 receives a rotational force; An output shaft 120 into which the input shaft 115 is inserted and coupled; And a torsion generating member 230 provided at a coupling portion of the input shaft 115 and the output shaft 120 to generate a restoring force when the input shaft 115 is rotated.

입력축(115)은 조향축(미도시)과 연결되어 회전력을 전달받는다. 입력축(115)의 단부에는 수개의 평면으로 이루어진 지지블럭(211)이 형성된다.The input shaft 115 is connected to a steering shaft (not shown) to receive a rotational force. At the end of the input shaft 115, a support block 211 consisting of several planes is formed.

한편, 전술한 지지블럭(211)은 입력축(115)의 단부에 형성된 돌출부(210)의 외주면에 형성될 수 있으며, 이러한 돌출부(210)는 출력축(120)의 삽입홈(220)으로부터 축방향으로 연장되는 연결홈(미도시)에 삽입된다.On the other hand, the above-described support block 211 may be formed on the outer circumferential surface of the protrusion 210 formed at the end of the input shaft 115, the protrusion 210 in the axial direction from the insertion groove 220 of the output shaft 120. It is inserted into an extending connection groove (not shown).

출력축(120)은 입력축(115)에 삽입되어 결합된다. 출력축(120)에는 연결홈(미도시)이 형성되고, 전술한 바와 같이 이러한 연결홈(미도시)에는 입력축(115)의 돌출부(210)가 삽입된다.The output shaft 120 is inserted into and coupled to the input shaft 115. A connection groove (not shown) is formed in the output shaft 120, and the protrusion 210 of the input shaft 115 is inserted into the connection groove (not shown) as described above.

토션발생부재(230)는 입력축(115)과 출력축(120)의 결합부위에 구비되어 입력축(115)의 회전시 복원력을 발생시킨다.The torsion generating member 230 is provided at the coupling portion of the input shaft 115 and the output shaft 120 to generate a restoring force when the input shaft 115 rotates.

토션발생부재(230)는 입력축(115)에 형성된 지지블럭(211)의 외주측에 끼워진다.The torsion generating member 230 is fitted to the outer circumferential side of the support block 211 formed on the input shaft 115.

토션발생부재(230)는 돌출부(210)의 외주면에 형성된 지지블럭(211)과 삽입홈(220)의 내주면 사이에 제공되되, 지지블럭(211)의 외주면을 감싸는 형상을 가질 수 있다.The torsion generating member 230 may be provided between the support block 211 formed on the outer circumferential surface of the protrusion 210 and the inner circumferential surface of the insertion groove 220, and may have a shape surrounding the outer circumferential surface of the support block 211.

한편, 토션발생부재(230)는 종래 입력축(115)과 출력축(120) 사이에 구비되는 토션바(150, 도 1 참조)의 역할을 수행하는 것으로서, 이와 같이 종래 토션바(150)의 역할을 대신하는 토션발생부재(230)는 본 발명의 특징을 이룬다.Meanwhile, the torsion generating member 230 serves as a torsion bar 150 (refer to FIG. 1) provided between the conventional input shaft 115 and the output shaft 120, and thus serves as the conventional torsion bar 150. Instead of the torsion generating member 230 forms a feature of the present invention.

이러한 토션발생부재(230)는 도면들에 도시된 바와 같이 사각형의 링 형상을 가질 수 있으나, 반드시 이에 한정되는 것은 아니며, 입력축(115)의 외주면에 형성된 지지블럭(211)과 출력축(120)의 삽입홈(220)의 형상에 대응하는 형상으로 이뤄지며, 일 예로 오각형의 링 등의 다각형 링 또는 타원형의 링 등으로 제공될 수도 있다.The torsion generating member 230 may have a rectangular ring shape as shown in the drawings, but is not necessarily limited thereto, and the support block 211 and the output shaft 120 formed on the outer circumferential surface of the input shaft 115 may be provided. It is made of a shape corresponding to the shape of the insertion groove 220, for example may be provided as a polygonal ring, such as a pentagonal ring or an oval ring.

또한, 도면들에서는 토션발생부재(230)가 하나의 링 구조로 이뤄진 예를 도시하였으나, 반드시 이에 한정되는 것은 아니며, 2개 이상의 토션발생부재가 축방향으로 직렬적으로 연결된 구조도 가능할 것이다.Further, in the drawings, the torsion generating member 230 is illustrated as an example in which one ring structure is formed, but is not necessarily limited thereto, and two or more torsion generating members may be connected in series in the axial direction.

그리고 이러한 토션발생부재(230)는 우레탄, 천연고무재 또는 폴리에스테르일래스토머(PE) 등과 같은 탄성재질로 형성될 수 있다.The torsion generating member 230 may be formed of an elastic material such as urethane, natural rubber or polyester elastomer (PE).

이 중, 도면들에서는 토션발생부재(230)가 사각형의 링 형상인 경우를 도시하였으며, 이를 토대로 토션발생부재(230)가 입력축(115)과 출력축(120) 사이에서 복원력(탄성력)을 가하는 예를 설명한다.Among these drawings, the torsion generating member 230 has a rectangular ring shape, and the torsion generating member 230 applies a restoring force (elastic force) between the input shaft 115 and the output shaft 120 based on this. Explain.

운전자가 조향휠에 힘을 가하여 조향휠을 회전시킴에 따라 발생된 회전력은 조향축을 통해 입력축(115)을 일 방향으로 회전시키게 되는데, 이 때, 도 3에 도시된 바와 같이, 지지블럭(211)과 삽입홈(220) 사이에 구비된 토션발생부재(230)는 도 4에 도시된 바와 같이 지지블럭(211)의 가장자리 부분에 맞닿는 부분이 눌리게 되고, 이에 따라 토션발생부재(230)의 눌린 부분에는 복원력(F)이 생기게 된다.The rotational force generated as the driver rotates the steering wheel by applying a force to the steering wheel rotates the input shaft 115 in one direction through the steering shaft, as shown in FIG. 3, the support block 211. And the torsion generating member 230 provided between the insertion groove 220 and the portion contacting the edge portion of the support block 211 is pressed as shown in FIG. 4, and thus the torsion generating member 230 is pressed. The restoring force F is generated in the part.

그리고 운전자가 조향휠에 가하는 힘을 제거하면, 전술한 복원력(F)이 지지블럭(211)을 타 방향으로 회전시키게 되므로, 결국 입력축(155)이 원래 위치로 되돌아오게 된다.When the driver removes the force applied to the steering wheel, the above-mentioned restoring force F causes the support block 211 to rotate in the other direction, so that the input shaft 155 is returned to its original position.

따라서, 종래 토션바(150)가 수행하던 비틀림 스프링 역할을 본 발명의 토션발생부재(230)가 담당하게 되는 것이다.Therefore, the torsion generating member 230 of the present invention is responsible for the torsion spring that the conventional torsion bar 150 performed.

이와 같은 본 발명의 실시예에 의하면, 종래 토션바의 비틀림 스프링 역할을 토션발생부재가 담당하도록 함으로써, 구조를 간단하게 할 수 있는 효과가 있게 된다.According to this embodiment of the present invention, by the torsion generating member to play the role of the torsion spring of the conventional torsion bar, there is an effect that can simplify the structure.

또한, 종래 토션바를 삭제하고 입력축의 돌출부 외주면에 형성된 지지블럭과 출력축의 삽입홈 사이에 토션발생부재를 삽입함으로써, 토션바 제작 및 조립에 의한 비용을 절감할 수 있는 효과가 있게 된다.In addition, by removing the conventional torsion bar and inserting the torsion generating member between the support block formed on the outer peripheral surface of the protrusion of the input shaft and the insertion groove of the output shaft, it is possible to reduce the cost of the torsion bar production and assembly.

또한, 토션발생부재의 재질 및 형상 변형을 통해 토션발생부재의 강성 튜닝을 자유롭게 할 수 있는 효과가 있게 된다.In addition, through the deformation of the material and shape of the torsion generating member there is an effect that can be free to the rigid tuning of the torsion generating member.

115 : 입력축
120 : 출력축
210 : 돌출부
211 : 지지블럭
220 : 삽입홈
230 : 토션발생부재115: input shaft
120: output shaft
210:
211: support block
220: Insertion groove
230: torsion generating member

Claims (3)

조향축과 연결되어 회전력을 전달받는 입력축;
상기 입력축이 삽입되어 결합되는 출력축; 및
상기 입력축과 출력축의 결합부위에 구비되어 상기 입력축의 회전시 복원력을 발생시키는 토션발생부재를 포함하는 것을 특징으로 하는 자동차의 전동식 조향장치.An input shaft connected to a steering shaft to receive rotational force;
An output shaft to which the input shaft is inserted and coupled; And
And a torsion generating member provided at a coupling portion of the input shaft and the output shaft to generate a restoring force when the input shaft is rotated. 제 1 항에 있어서,
상기 입력축의 단부에는 수개의 평면으로 이루어진 지지블럭이 형성되고,
상기 토션발생부재는 상기 지지블럭의 외주측에 끼워지는 것을 특징으로 하는 자동차의 전동식 조향장치.The method of claim 1,
At the end of the input shaft is formed a support block consisting of several planes,
The torsion generating member is an electric steering apparatus of a vehicle, characterized in that fitted to the outer peripheral side of the support block. 제 1 항에 있어서,
상기 입력축의 단부에는 외주면에 지지블럭이 형성된 돌출부가 형성되고,
상기 출력축에는 돌출부의 지지블럭이 삽입되는 삽입홈이 형성되며,
상기 토션발생부재는 상기 지지블럭의 외주면과 삽입홈의 내주면 사이에 구비되는 것을 특징으로 하는 자동차의 전동식 조향장치.The method of claim 1,
At the end of the input shaft is formed a protrusion formed with a support block on the outer peripheral surface,
The output shaft is formed with an insertion groove into which the support block of the protrusion is inserted,
The torsion generating member is an electric steering apparatus of a vehicle, characterized in that provided between the outer peripheral surface of the support block and the inner peripheral surface of the insertion groove.
KR1020120092879A 2012-08-24 2012-08-24 Electric power steering system of vehicle KR101596080B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9891442B2 (en) 2014-08-12 2018-02-13 Samsung Display Co., Ltd. Variable curvature display device and displaying method thereof
KR20180039362A (en) 2016-10-10 2018-04-18 주식회사 만도 Electronic Power Steering System of Dual Torsion Bar

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100051242A (en) * 2008-11-07 2010-05-17 주식회사 만도 Steering axis for vehicle equipped with clearance compensating connector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100051242A (en) * 2008-11-07 2010-05-17 주식회사 만도 Steering axis for vehicle equipped with clearance compensating connector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9891442B2 (en) 2014-08-12 2018-02-13 Samsung Display Co., Ltd. Variable curvature display device and displaying method thereof
KR20180039362A (en) 2016-10-10 2018-04-18 주식회사 만도 Electronic Power Steering System of Dual Torsion Bar
US10753385B2 (en) 2016-10-10 2020-08-25 Mando Corporation Electronic power steering system
DE102017217357B4 (en) 2016-10-10 2021-12-09 Mando Corporation ELECTRONIC POWER STEERING SYSTEM

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