KR20030034602A - A electric power steering apparatus for vehicle - Google Patents

A electric power steering apparatus for vehicle Download PDF

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Publication number
KR20030034602A
KR20030034602A KR1020010066254A KR20010066254A KR20030034602A KR 20030034602 A KR20030034602 A KR 20030034602A KR 1020010066254 A KR1020010066254 A KR 1020010066254A KR 20010066254 A KR20010066254 A KR 20010066254A KR 20030034602 A KR20030034602 A KR 20030034602A
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KR
South Korea
Prior art keywords
motor
power steering
angular contact
contact bearing
electric power
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KR1020010066254A
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Korean (ko)
Inventor
남궁주
Original Assignee
주식회사 만도
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Priority to KR1020010066254A priority Critical patent/KR20030034602A/en
Publication of KR20030034602A publication Critical patent/KR20030034602A/en

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Classifications

    • 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
    • B62D5/0421—Electric motor acting on or near 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
    • B62D3/12—Steering gears mechanical of rack-and-pinion type
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: Electric power steering of a vehicle is provided to reduce cost by installing an angular contact bearing to a motor assembly and to repair effectively by changing each component separately. CONSTITUTION: Electric power steering of a vehicle has a torque sensor; a tie rod; a pinion housing; a rack bar and a motor assembly(50). The angular contact bearing is installed inside a motor housing(54). The angular contact bearing supports load of the rack bar with a ball screw(51). Changing of a motor, the ball screw and the pinion housing separately is unnecessary by installing the angular contact bearing between the motor housing and a motor shaft(56) of the motor assembly. Thereby, cost is reduced and repair is improved.

Description

차량용 전동 파워스티어링{A ELECTRIC POWER STEERING APPARATUS FOR VEHICLE}Electric Power Steering for Vehicles {A ELECTRIC POWER STEERING APPARATUS FOR VEHICLE}

본 발명은 차량용 전동 파워스티어링에 관한 것으로, 특히 랙바의 축방향 하중을 지지하는 앵귤러콘택트베어링을 모터조립체에 설치함으로써 구성품을 단독화하여 제조성을 향상시켜 원가절감을 꾀하고, 수리시 각 구성품을 별도로 교체할 수 있게하여 수리성을 향상시킨 차량용 전동 파워스티어링에 관한 것이다.The present invention relates to an electric power steering for a vehicle, and in particular, by installing the angular contact bearing supporting the axial load of the rack bar in the motor assembly, the components are isolated to improve the manufacturability, thereby reducing the cost, and repairing each component separately. The present invention relates to a vehicle electric power steering which can be replaced to improve repairability.

일반적으로 차량의 파워스티어링은 차량의 진행방향을 임의로 바꾸기 위한장치를 말하며, 상기 파워스티어링은 스티어링휠과 스티어링샤프트 및 스티어링컬럼으로 구성되는 조작기구와, 조작기구의 운동방향을 변환하는 기어기구, 이 기어기구의 움직임을 바퀴로 전달하는 링크기구로 크게 구분된다.In general, the power steering of the vehicle refers to a device for arbitrarily changing the direction of movement of the vehicle, the power steering is a control mechanism consisting of a steering wheel, a steering shaft and a steering column, a gear mechanism for converting the movement direction of the operating mechanism, It is largely divided into a link mechanism that transmits the movement of the gear mechanism to the wheel.

한편, 조작기구의 운동방향을 전환하는 기어기구는 워엄과 섹터기어를 이용한 워엄섹터방식과 랙과 피니언의 조합으로 작동하는 랙피니언방식 및 워엄과 너트간에 볼을 삽입하여 마찰저항을 감소시킨 볼너트형이 일반적으로 사용되고 있다.On the other hand, the gear mechanism for changing the movement direction of the operation mechanism is the worm sector method using the worm and the sector gear, the rack pinion method operated by the combination of the rack and the pinion, and the ball nut which reduced the frictional resistance by inserting balls between the worm and the nut Molds are commonly used.

이러한 기어기구중 널리 사용되는 것이 랙피니언 방식으로 여기에 볼스크류와 모터를 사용하여 조향력을 배가시키는 것이 전동 파워스티어링 장치이다.Among the gear mechanisms, the electric power steering device is a rack pinion method, which uses a ball screw and a motor to double the steering force.

도 3은 이러한 종래의 전동 파워스티어링 장치의 모터조립체를 보인 단면도이다. 이에 도시된 바와 같이, 중공으로 마련된 피니언하우징(1)의 내부에는 운전자가 발생시킨 회전력에 따라 좌,우측 방향으로 이동 가능하도록 랙바(2)가 설치된다.Figure 3 is a cross-sectional view showing a motor assembly of such a conventional electric power steering apparatus. As shown in the figure, the rack bar 2 is installed inside the pinion housing 1 provided in a hollow so as to be movable in the left and right directions according to the rotational force generated by the driver.

그리고, 이 랙바(2)의 일측 외주면에는 나선형의 홈(3)이 마련되며, 이 홈(3)의 외측으로는 볼을 매개로 회전하여 랙바(2)를 이동시킬 수 있도록 볼스크류(4)가 설치된다.Then, one side outer peripheral surface of the rack bar (2) is provided with a spiral groove 3, the ball screw (4) to move the rack bar (2) by rotating the ball through the outside of the groove (3) Is installed.

또, 볼스크류(4)의 외측으로는 이와 함께 연동될 수 있도록 로터샤프트(5)가 마련되고, 이 로터샤프트(5)의 외측으로는 스테이터(6)가 피니언하우징(1)의 내부에 고정 설치된다.In addition, a rotor shaft 5 is provided on the outside of the ball screw 4 so as to be interlocked with the ball screw 4, and a stator 6 is fixed inside the pinion housing 1 outside the rotor shaft 5. Is installed.

한편, 로터샤프트(5)의 외부와 피니언하우징(1)의 내부 사이에는 앵귤러콘텍트베어링(7)이 설치되는데, 이 앵귤러콘텍트베어링(7)은 피니언하우징(1)의 내부에압입 결합되어 그 내부에서 로터샤프트(5)가 원활히 회전되도록 한다.Meanwhile, an angular contact bearing 7 is installed between the outside of the rotor shaft 5 and the inside of the pinion housing 1, and the angular contact bearing 7 is press-fitted into the inside of the pinion housing 1. In the rotor shaft 5 to be smoothly rotated.

그러나, 이와 같이 앵귤러콘택트베어링이 피니언하우징에 고정 설치되어 랙바의 축방향 하중을 지지하는 구조는 조립성이 좋지않고, 수리시 모터와 볼스크류 및 피니언하우징 전체를 교체해야 하므로 소비자의 부담이 커지는 문제점이 있었다.However, the structure in which the angular contact bearing is fixed to the pinion housing to support the axial load of the rack bar is not assemblable, and the burden on the consumer is increased because the entire motor, the ball screw and the pinion housing must be replaced during repair. There was this.

이에 본 발명은 상기와 같은 문제점을 해소하기 위해 안출된 것으로, 랙바의 축방향 하중을 지지하는 앵귤러콘택트베어링을 모터조립체에 설치함으로써 구성품을 단독화하여 제조성을 향상시켜 원가절감을 꾀하고, 수리시 각 구성품을 별도로 교체할 수 있게하여 수리성을 향상시킨 차량용 전동 파워스티어링을 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, by installing the angular contact bearing supporting the axial load of the rack bar in the motor assembly to increase the manufacturability by solely components to improve the manufacturability, at the time of repair It is an object of the present invention to provide a vehicle electric power steering which improves repairability by allowing each component to be replaced separately.

도 1은 본 발명에 따른 전동 파워스티어링의 일부를 보인 단면도이다.1 is a cross-sectional view showing a part of the electric power steering according to the present invention.

도 2는 본 발명에 따른 모터조립체를 보인 단면도이다.2 is a cross-sectional view showing a motor assembly according to the present invention.

도 3은 종래의 모터조립체를 보인 단면도이다.3 is a cross-sectional view showing a conventional motor assembly.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

30: 피니언하우징 40: 랙바30: pinion housing 40: rack bar

52: 락스크류 54: 모터하우징52: lock screw 54: motor housing

55: 앵귤러콘텍트베어링 56: 모터샤프트55: angular contact bearing 56: motor shaft

상기와 같은 목적을 달성하기 위한 본 발명은, 수직방향으로 위치한 토크센서의 일측에 타이로드가 설치됨과 더불어 타측에 피니언하우징이 설치되고, 이 피니언하우징에 끼워진 랙바의 소정위치에 모터조립체가 설치되며, 상기 랙바의 타단에 타이로드가 설치된 차량용 전동 파워스티어링에 있어서, 상기 모터조립체는, 상기 피니언하우징에 연결설치된 모터하우징의 내부에 앵귤러콘텍트베어링이 설치되고, 이 앵귤러콘텍트베어링은 볼스크류를 매개로 랙바의 축방향 하중을 지지하는 것을 특징으로 한다.The present invention for achieving the above object, the tie rod is installed on one side of the torque sensor located in the vertical direction and the pinion housing is installed on the other side, the motor assembly is installed at a predetermined position of the rack bar fitted to the pinion housing. In the electric power steering for a vehicle provided with a tie rod at the other end of the rack bar, the motor assembly, an angular contact bearing is installed inside the motor housing connected to the pinion housing, the angular contact bearing is a ball screw It is characterized by supporting the axial load of the rack bar.

이하 본 발명의 실시예에 따른 구성 및 작용을 첨부 도면에 따라 상세히 설명한다.Hereinafter, the configuration and operation according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명을 설명하는 파워스티어링의 일부를 나타내는 단면도이고, 도 2는 본 발명의 요부인 모터조립체를 나타내는 단면도이다.1 is a cross-sectional view showing a part of a power steering illustrating the present invention, and FIG. 2 is a cross-sectional view showing a motor assembly which is a main part of the present invention.

본 발명의 파워스티어링은, 수직방향으로 위치한 토크센서(10)의 일측에 타이로드(20)가 설치됨과 더불어 타측에 피니언하우징(30)이 설치되고, 이 피니언하우징(30)에 끼워진 랙바(40)의 소정위치에 모터조립체(50)가 설치되며, 상기 랙바(40)의 타단에 타이로드(60)가 설치된다.In the power steering of the present invention, the tie rod 20 is installed at one side of the torque sensor 10 located in the vertical direction, and the pinion housing 30 is installed at the other side, and the rack bar 40 fitted to the pinion housing 30 is provided. The motor assembly 50 is installed at a predetermined position of), and the tie rod 60 is installed at the other end of the rack bar 40.

여기서 상기 모터조립체(50)는, 상기 피니언하우징(30)에 연결설치된 모터하우징(54)의 내부에 설치된 앵귤러콘텍트베어링(55)을 매개로 모터샤프트(56)가 설치되고, 상기 랙바(40)에 볼(51a)을 매개로 볼스크류(51)가 결합됨과 더불어 상기 모터샤프트(56)의 일단부 내측에 끼워져 설치되며, 상기 모터샤프트(56)의 단부에 상기 볼스크류(51)의 이탈을 방지하도록 락스크류(52)가 설치된다.Here, the motor assembly 50, the motor shaft 56 is installed via the angular contact bearing 55 installed inside the motor housing 54 connected to the pinion housing 30, the rack bar 40 The ball screw 51 is coupled to the ball 51a via the ball 51a, and the ball screw 51 is fitted inside the one end of the motor shaft 56, and the ball screw 51 is separated from the end of the motor shaft 56. The lock screw 52 is installed to prevent it.

그리고 상기 락스크류(52)의 일측면에는 마찰재(57)가 설치되어 볼스크류 (51)에 밀착되고, 상기 모터샤프트(56)의 내측에는 베벨형 멈춤링(58)이 결합되어 락스크류(52)의 이탈을 방지하는 구조로 되어 있다.A friction material 57 is installed on one side of the lock screw 52 to be in close contact with the ball screw 51, and a bevel type stop ring 58 is coupled to the inside of the motor shaft 56 to lock screw 52. ) To prevent the separation of

미설명부호 59a는 스테이터이고, 59b는 마그네트이며, 59c는 볼베어링이고, 59d는 리어브라켓이며, 59e는 포지션센서이다.Reference numeral 59a is a stator, 59b is a magnet, 59c is a ball bearing, 59d is a rear bracket, and 59e is a position sensor.

따라서 상기 앵귤러콘택트베어링(55)을 모터조립체(50)의 모터하우징(54)과 모터샤프트(56)의 사이에 설치하여 구조를 단순화 함으로써, 수리시 별도로 모터나 볼스크류 및 피니언하우징을 별도로 교체해야 하는 일이 없게 된다.Therefore, the angular contact bearing 55 is installed between the motor housing 54 and the motor shaft 56 of the motor assembly 50 to simplify the structure, so that the motor or the ball screw and the pinion housing must be replaced separately during repair. There is no work to do.

즉, 상기 앵귤러콘택트베어링(55)을 교체하기 위해서는 상기 모터하우징(54)과 모터샤프트(56)를 분리하는 것만으로 가능하기 때문에 수리성이 양호하게 된다.That is, in order to replace the angular contact bearing 55, the motor housing 54 and the motor shaft 56 can be separated only, so that the repairability is improved.

이상에서 설명한 바와 같이, 본 발명의 차량용 전동 파워스티어링은 구성품을 단독화하여 제조성을 향상시켜 원가절감을 꾀하고, 수리시 각 구성품을 별도로 교체할 수 있게하여 수리성을 향상시킬 수 있는 효과가 있다.As described above, the vehicular electric power steering of the present invention has the effect of improving the manufacturability by singularizing the components alone, reducing the cost, and making it possible to replace each component separately during repair. .

Claims (1)

수직방향으로 위치한 토크센서의 일측에 타이로드가 설치됨과 더불어 타측에 피니언하우징이 설치되고, 이 피니언하우징에 끼워진 랙바의 소정위치에 모터조립체가 설치되며, 상기 랙바의 타단에 타이로드가 설치된 차량용 전동 파워스티어링에 있어서,Tie rod is installed at one side of the torque sensor located in the vertical direction, pinion housing is installed at the other side, motor assembly is installed at a predetermined position of the rack bar fitted to the pinion housing, and the motor rod is installed at the other end of the rack bar. In power steering, 상기 모터조립체는, 상기 피니언하우징에 연결설치된 모터하우징의 내부에 앵귤러콘텍트베어링이 설치되고, 이 앵귤러콘텍트베어링은 볼스크류를 매개로 랙바의 축방향 하중을 지지하는 것을 특징으로 하는 차량용 전동 파워스티어링.The motor assembly, an angular contact bearing is installed inside the motor housing connected to the pinion housing, the angular contact bearing is a vehicle electric power steering characterized in that to support the axial load of the rack bar via a ball screw.
KR1020010066254A 2001-10-26 2001-10-26 A electric power steering apparatus for vehicle KR20030034602A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100844855B1 (en) * 2007-04-05 2008-07-09 에스앤티대우(주) Hollow motor for automobile and method for assembling the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0999846A (en) * 1995-10-04 1997-04-15 Nippon Seiko Kk Electric power steering device
JPH09109906A (en) * 1995-10-23 1997-04-28 Nippon Seiko Kk Motor-driven power steering device
JPH11198828A (en) * 1998-01-20 1999-07-27 Mitsuba Corp Electric power steering device
JP2001163231A (en) * 1999-09-30 2001-06-19 Ntn Corp Motor-driven power steering device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0999846A (en) * 1995-10-04 1997-04-15 Nippon Seiko Kk Electric power steering device
JPH09109906A (en) * 1995-10-23 1997-04-28 Nippon Seiko Kk Motor-driven power steering device
JPH11198828A (en) * 1998-01-20 1999-07-27 Mitsuba Corp Electric power steering device
JP2001163231A (en) * 1999-09-30 2001-06-19 Ntn Corp Motor-driven power steering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100844855B1 (en) * 2007-04-05 2008-07-09 에스앤티대우(주) Hollow motor for automobile and method for assembling the same

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