KR20080004091A - Strut type suspension system of vehicle - Google Patents

Strut type suspension system of vehicle Download PDF

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Publication number
KR20080004091A
KR20080004091A KR1020060062597A KR20060062597A KR20080004091A KR 20080004091 A KR20080004091 A KR 20080004091A KR 1020060062597 A KR1020060062597 A KR 1020060062597A KR 20060062597 A KR20060062597 A KR 20060062597A KR 20080004091 A KR20080004091 A KR 20080004091A
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KR
South Korea
Prior art keywords
strut
type suspension
vehicle
wheel
suspension system
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KR1020060062597A
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Korean (ko)
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박종운
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기아자동차주식회사
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Priority to KR1020060062597A priority Critical patent/KR20080004091A/en
Publication of KR20080004091A publication Critical patent/KR20080004091A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
    • B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/018—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the use of a specific signal treatment or control method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25—Stroke; Height; Displacement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A strut-type suspension system of a vehicle is provided to improve driving comfort by changing a spring load axis by rotating an upper spring seat according to a stroke. In a strut-type suspension system of a vehicle including a wheel carrier rotatably supporting a wheel, a lower control arm connecting a lower end portion of the wheel carrier with a vehicle frame and a strut assembly whose lower end portion is connected with an upper end of the wheel carrier, the strut-type suspension system comprises: an upper spring seat(16) supporting an upper portion of a coil spring(8), which is rotatably fixed to a lower fixing plate(20) of an insulator(14) by interposing a rolling member(22), a ring gear(26) mounted in an outer circumference portion of the upper spring seat and a rotation/reverse rotation motor(28) controlled by a control unit(34) according to change of a stroke of a shock absorber.

Description

차량의 스트러트형 현가장치{STRUT TYPE SUSPENSION SYSTEM OF VEHICLE}Strut type suspension system of vehicle {STRUT TYPE SUSPENSION SYSTEM OF VEHICLE}

도 1은 본 발명이 적용되는 옵셋형 스트러트 현가장치의 일예도.1 is an example of an offset strut suspension device to which the present invention is applied.

도 2는 본 발명의 요부 사시도.2 is a perspective view of main parts of the present invention;

도 3은 일반적인 상태에서의 인슐레이터 단면도.3 is an insulator cross-sectional view in a general state.

도 4는 어퍼 스프링 시트를 180°회전 시킨 상태에서의 인슐레이터 단면도.4 is a cross-sectional view of the insulator in a state where the upper spring sheet is rotated 180 °.

도 5의 (A)(B)는 종래 스트러트 현가장치의 문제점을 설명하기 위한 도면이다.5A and 5B are diagrams for explaining problems of the conventional strut suspension system.

본 발명은 차량의 전륜에 주로 적용되는 스트러트형 현가장치에 관한 것으로서, 보다 상세하게는 옵셋형 스트러트 현가장치의 어퍼 스프링 시트를 스트로크에 따라 가변 회전시켜 스프링 하중 축선을 가변시킴으로써, 쇽업 소버에 작용하는 마찰을 최소화하여 승차감을 향상시킬 수 있는 자동차의 스트러트형 현가장치에 관한 것이다.The present invention relates to a strut-type suspension mainly applied to the front wheel of a vehicle, and more particularly, by varying the spring load axis by varying the upper spring seat of the offset-type strut suspension in accordance with the stroke, It relates to a strut-type suspension of a vehicle that can improve the riding comfort by minimizing friction.

차량에 있어서의 현가장치는 차체와 휠 사이에 존재하며, 이 두 강체를 하나 혹은 다수의 링크를 이용하여 연결하여 주는 장치로서, 상하방향으로는 스프링과 유압 쇽 업소오버등에 의해 지지되고, 기타방향으로는 높은 강성과 유연성을 적절히 조화시킴으로써, 차체와 휠 사이의 상대운동을 기계적으로 적절히 조화시키는 기능을 수행하게 된다.Suspension in a vehicle exists between a vehicle body and a wheel, and is a device that connects these two rigid bodies by using one or more links. It is supported by springs and hydraulic shock absorbers in the vertical direction, and in other directions. By properly matching the high rigidity and flexibility, it performs a function to mechanically match the relative movement between the vehicle body and the wheel.

이러한 현가장치는 여러 종류로 개발되어 자동차에 적용되고 있는데, 승용차의 전륜 현가장치로는 스트러트 타입의 현가장치가 주로 사용되고 있다.Such suspension devices have been developed in various types and applied to automobiles. As a front wheel suspension device of a passenger car, a strut type suspension device is mainly used.

상기 스트러트 타입 현가장치는 도 5의 (A)에서와 같은 컨벤셔널 타입(CONVENSIONAL TYPE)과 (B)와 같은 옵셋형(OFFSET TYPE)으로 이루어진다.The strut type suspension device is composed of a conventional type (CONVENSIONAL TYPE) as shown in Fig. 5A and an offset type as shown in (B).

상기에서 컨벤셔널 타입은 쇽 업소오버(100)의 축선(K)과 코일 스프링(102)의 하중 축선(S)이 일치하는 것으로서, 레이아웃은 다소 유리하지만 신축 작용시 a, b 부분에서 마찰이 크게 작용하여 승차감 저하를 초래할 수 있다는 문제점을 가지고 있다.In the conventional type, the axis K of the shock absorber 100 and the load axis S of the coil spring 102 coincide with each other. The layout is somewhat advantageous, but the friction is large in the a and b portions during stretching. There is a problem that can act to cause a deterioration of the ride comfort.

그리고 옵셋형 타입은 코일 스프링(102)의 하중 축선(S)을 가상의 조향축선(SP)과 일치하는 것으로서, 레이아웃은 다소 불리하지만 쇽 업소오버(100)의 축선(K)과의 옵셋 각으로 인하여 발생하는 힘으로 횡력을 줄일 수 있다는 장점은 있다.In the offset type, the load axis S of the coil spring 102 coincides with the virtual steering axis SP. Although the layout is somewhat disadvantageous, the offset angle with the axis K of the shock absorber 100 is offset. There is an advantage that can reduce the lateral force by the force generated.

따라서 본 발명자는 상기 2개의 현가장치를 장점만을 도출하여 하나의 현가장치에 적용할 수 있다면 이상적일 수 있다는 데에 착안하여 본 발명을 안출하게 되었다.Therefore, the inventors of the present invention have devised the present invention with the idea that it may be ideal if the two suspensions can be applied to one suspension by deriving only the advantages.

즉, 옵셋형 스트러트 현가장치의 어퍼 스프링 시트를 스트로크에 따라 가변 회전시켜 스프링 하중 축선을 가변시킴으로써, 쇽 업소오버에 작용하는 마찰을 최소화할 수 있고, 옵셋 각으로 횡력을 최소화할 수 있도록 하여 승차감을 향상시킬 수 있는 자동차의 스트러트형 현가장치를 제공함에 그 목적이 있는 것이다.In other words, by varying the spring load axis by rotating the upper spring seat of the offset strut suspension in accordance with the stroke, it is possible to minimize the friction acting on the shock absorber and to minimize the lateral force at the offset angle so that the riding comfort It is an object of the present invention to provide a strut-type suspension of a vehicle that can be improved.

이러한 목적을 실현하기 위하여 본 발명은, 휠을 회전 가능하게 지지하는 휠 캐리어와, 상기 휠 캐리어의 하단부를 차체와 연결하여 주는 로워 컨트롤 아암과, 코일 스프링과 쇽 업소오버가 일체로 형성되어 상단부가 차체에 현가 지지되고, 하단부가 상기 휠 캐리어의 상단과 연결되는 스트러트 어셈블리를 포함하여 이루어지는 현가장치에 있어서, In order to achieve the above object, the present invention provides a wheel carrier rotatably supporting a wheel, a lower control arm connecting the lower end of the wheel carrier to a vehicle body, and a coil spring and a shock absorber are integrally formed so that an upper end thereof is integrally formed. A suspension device which is suspended on a vehicle body and comprises a strut assembly having a lower end connected to an upper end of the wheel carrier,

상기 코일 스프링의 상측부를 지지하는 어퍼 스프링 시트를 구름부재를 개재시켜 인슐레이터의 하부 고정판에 회전 가능하게 고정하고, 상기 어퍼 스프링 시트의 보스부 외경부에 링기어를 장착하여 쇽 업소오버의 스트로크 변화에 따라 컨트롤 유닛에 의해 제어되는 정,역회전 구동모터에 의하여 구동될 수 있도록 형성한 자동차의 스트러트형 현가장치를 제공한다.The upper spring sheet for supporting the upper portion of the coil spring is rotatably fixed to the lower fixing plate of the insulator through a rolling member, and a ring gear is attached to the outer diameter of the boss portion of the upper spring sheet to change the stroke of the shock absorber. In accordance with the present invention, there is provided a strut-type suspension device for a vehicle, which is formed to be driven by a forward and reverse rotation driving motor controlled by a control unit.

이하, 상기의 목적을 구체적으로 실현할 수 있는 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

도 1은 본 발명이 적용되는 옵셋형 스트러트 현가장치를 나타낸 도면으로서, 휠(2)을 회전 가능하게 지지하는 휠 캐리어(4)는 그 하단이 로워 컨트롤 아암(6)을 개재시켜 차체와 연결되고, 상단이 코일 스프링(8)과 쇽 업오버(10)가 일체로 형성되는 스트러트 어셈블리(12)와 일체로 형성되며, 상기 코일 스프링(8)의 축선(S)을 가상의 조향축선(SP)와 일치시켜 구성된다.1 is a view illustrating an offset strut suspension device to which the present invention is applied, and a wheel carrier 4 rotatably supporting a wheel 2 is connected to a vehicle body through a lower control arm 6 at a lower end thereof; The upper end is integrally formed with the strut assembly 12 in which the coil spring 8 and the shock up-over 10 are integrally formed, and the axis S of the coil spring 8 is the virtual steering axis SP. It is constructed in accordance with.

이에따라 노면으로부터 입력되는 진동 및 충격이 스트러트 어셈블리에 의해 감쇠되어 차체에 전달되는 진동과 충격을 최소화하게 되는 것이다.Accordingly, the vibration and shock input from the road surface is attenuated by the strut assembly to minimize the vibration and shock transmitted to the vehicle body.

그리고 상기와 같은 스트러트 어셈블리(12)의 상단부는 미도시한 차체와의 사이에 인슐레이터(14)를 개재시켜 현가 지지되는데, 상기 인슐레이터(14)의 구조는 공지된 것이므로 상세한 설명은 생략하기로 한다.In addition, the upper end of the strut assembly 12 as described above is supported by suspension through an insulator 14 between a vehicle body not shown. Since the structure of the insulator 14 is well known, a detailed description thereof will be omitted.

상기와 같은 현가장치에 있어서, 본 발명은 도2 및 도 3에서와 같이, 상기 코일 스프링(8)의 상측부를 지지하는 어퍼 스프링 시트(16)는 인슐레이터(14)의 하부 지지판(18)의 저면에 부착된 고정판(20)과의 사이에 구름부재(22)를 개재시켜 연결하였다.In the suspension as described above, the present invention, as shown in Figures 2 and 3, the upper spring seat 16 for supporting the upper portion of the coil spring 8 is the bottom surface of the lower support plate 18 of the insulator 14 Connected via a rolling member 22 between the fixed plate 20 attached to it.

상기에서 구름부재(22)는 상기 어퍼 스프링 시트(16)가 회전하는데 간섭을 일으키지 않는 부재로서, 스러스트 베어링 또는 윤활부재가 적용되는데, 본 발명에서는 스러스트 베어링이 적용된 예를 도시하고 있다.The rolling member 22 is a member that does not cause interference with the upper spring sheet 16 to rotate, a thrust bearing or a lubricating member is applied, the present invention shows an example in which the thrust bearing is applied.

그리고 상기 어퍼 스프링 시트(16)의 보스부(24) 외경부에 링기어(26)를 장착하고, 이 링기어(26)에는 정,역회전 구동모터(28)에 의하여 구동되는 피니언 기어(30)가 치합된다.A ring gear 26 is mounted on the outer diameter of the boss portion 24 of the upper spring seat 16, and the ring gear 26 is driven by a forward and reverse rotation drive motor 28. ) Is matched.

이에 따라 상기 정,역회전 구동모터(28)가 작동되면 어퍼 스프링 시트(16)가 회전하게 되는 것이다,Accordingly, when the forward and reverse rotation driving motor 28 is operated, the upper spring seat 16 is to rotate,

그리고 상기 정, 역회전 구동 모터(28)는 휠 센터의 높이를 검출하는 하이트 센서(Height Sensor)(32)에서 보내어지는 신호에 따라 컨트롤 유닛(34)에서 제어하 게 된다.In addition, the forward and reverse rotation driving motor 28 is controlled by the control unit 34 in accordance with a signal sent from the height sensor (Height Sensor) 32 for detecting the height of the wheel center.

상기와 같은 본 발명에 있어서, 공차의 상태에서는 도 3에서와 같이 어퍼 스프링 시트(16)는 차체측으로 기울어져 있는 최초의 셋팅 상태를 유지하게 된다.In the present invention as described above, in the state of tolerance, the upper spring seat 16 maintains the initial setting state inclined toward the vehicle body side as shown in FIG.

이러한 상태에서 선회등에 의하여 휠 센터가 상승하게 되면, 이의 정보를 하이트 센서(34)에서 검출하여 컨트롤 유닛(34)으로 보내게 된다.In this state, when the wheel center is raised by turning, the information thereof is detected by the height sensor 34 and sent to the control unit 34.

그러면, 컨트롤 유닛(34)에서는 정,역회전 구동모터(28)를 구동시켜 어퍼 스프링 시트(16)를 회전시키게 되는데, 이때 180°를 회전시키는 경우에는 도3과 반대로 어퍼 스프링 시트(16)는 휠측이 낮고, 차체측이 높아지면서 코일 스프링(8)의 하중 축선을 변화시키게 된다.Then, the control unit 34 rotates the upper spring seat 16 by driving the forward and reverse rotation driving motor 28. In this case, the upper spring seat 16 is rotated in contrast to FIG. As the wheel side is lower and the vehicle body side is higher, the load axis of the coil spring 8 is changed.

물론 상기에서는 휠 센터가 변할 경우, 최대한 변화한 상태를 설명하고 있는 것이며, 실제로는 휠 센터의 높이 변화에 따라 180°범위내에서 어퍼 스프링 시트(16)를 회전시켜 주게 된다.Of course, when the wheel center is changed, the state that is changed as much as possible is described, and in practice, the upper spring seat 16 is rotated within the range of 180 ° according to the height change of the wheel center.

상기와 같이 차량의 주행시 현가장치의 신축 스트로크의 변화에 따라 어퍼 스프링 시프(16)를 회전시켜 코일 스프링(8)의 하중 축선이 변화시킴으로써, 횡력 변동에 능동적으로 대처가 가능하게 되어 쇽 업소오버(10)에 작용하는 마찰을 최소화할 수 있게 되는 것이다.As described above, by rotating the upper spring sheath 16 and changing the load axis of the coil spring 8 in accordance with the change of the expansion and contraction stroke of the suspension device while driving the vehicle, it is possible to actively cope with the lateral force variation. The friction acting on 10) can be minimized.

이상에서와 같이 본 발명에 의하면, 옵셋형 스트러트 현가장치의 어퍼 스프링 시트를 스트로크에 따라 가변 회전시켜 스프링 하중 축선을 가변시킴으로써, 쇽 업소오버에 작용하는 마찰을 최소화할 수 있고, 옵셋 각으로 횡력을 최소화할 수 있도록 하여 승차감을 향상시킬 수 있는 발명인 것이다.As described above, according to the present invention, by varying the spring load axis by rotating the upper spring seat of the offset strut suspension in accordance with the stroke, it is possible to minimize the friction acting on the shock absorber, and to reduce the lateral force at the offset angle. It is an invention that can improve the riding comfort by minimizing.

Claims (3)

휠을 회전 가능하게 지지하는 휠 캐리어와, 상기 휠 캐리어의 하단부를 차체와 연결하여 주는 로워 컨트롤 아암과, 코일 스프링과 쇽 업소오버가 일체로 형성되어 상단부가 차체에 현가 지지되고, 하단부가 상기 휠 캐리어의 상단과 연결되는 스트러트 어셈블리를 포함하여 이루어지는 현가장치에 있어서, A wheel carrier rotatably supporting the wheel, a lower control arm connecting the lower end of the wheel carrier to the vehicle body, a coil spring and a shock absorber are integrally formed so that the upper end is suspended from the vehicle body, and the lower end is the wheel. In the suspension comprising a strut assembly connected to the top of the carrier, 상기 코일 스프링의 상측부를 지지하는 어퍼 스프링 시트를 구름부재를 개재시켜 인슐레이터의 하부 고정판에 회전 가능하게 고정하고, 상기 어퍼 스프링 시트의 보스부 외경부에 링기어를 장착하여 쇽 업소오버의 스트로크 변화에 따라 컨트롤 유닛에 의해 제어되는 정,역회전 구동모터에 의하여 구동될 수 있도록 형성함을 특징으로 하는 자동차의 스트러트형 현가장치.The upper spring sheet for supporting the upper portion of the coil spring is rotatably fixed to the lower fixing plate of the insulator through a rolling member, and a ring gear is attached to the outer diameter of the boss portion of the upper spring sheet to change the stroke of the shock absorber. The strut-type suspension of the vehicle, characterized in that it is formed to be driven by the forward, reverse rotation drive motor controlled by the control unit. 청구항 1에 있어서, 쇽 업소오버의 스트로크 변화는 휠 센터의 높이를 검출하는 하이트 센서에 의하여 검출될 수 있도록 구성한 것을 특징으로 하는 자동차의 스트러트형 현가장치.The strut-type suspension device for an automobile according to claim 1, wherein the stroke change of the shock absorber is configured to be detected by a height sensor for detecting the height of the wheel center. 청구항 1에 있어서, 구름부재는 스러스트 베어링으로 이루어짐을 특징으로 하는 자동차의 스트러트형 현가장치. The strut-type suspension of a vehicle according to claim 1, wherein the rolling member is formed of a thrust bearing.
KR1020060062597A 2006-07-04 2006-07-04 Strut type suspension system of vehicle KR20080004091A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101526710B1 (en) * 2013-11-19 2015-06-05 현대자동차주식회사 Wheel center control apparatus of vehicle suspension system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101526710B1 (en) * 2013-11-19 2015-06-05 현대자동차주식회사 Wheel center control apparatus of vehicle suspension system

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