KR101081141B1 - Coupled Torsion Beam Axle Suspension - Google Patents

Coupled Torsion Beam Axle Suspension Download PDF

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Publication number
KR101081141B1
KR101081141B1 KR1020090076259A KR20090076259A KR101081141B1 KR 101081141 B1 KR101081141 B1 KR 101081141B1 KR 1020090076259 A KR1020090076259 A KR 1020090076259A KR 20090076259 A KR20090076259 A KR 20090076259A KR 101081141 B1 KR101081141 B1 KR 101081141B1
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KR
South Korea
Prior art keywords
torsion beam
trailing arm
warping
suspension
ctba suspension
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KR1020090076259A
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Korean (ko)
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KR20110018673A (en
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손동주
임동민
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현대자동차주식회사
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Priority to KR1020090076259A priority Critical patent/KR101081141B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/18—Resilient suspensions characterised by arrangement, location or kind of springs having torsion-bar springs only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/008—Attaching arms to unsprung part of vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/20—Semi-rigid axle suspensions
    • B60G2200/21—Trailing arms connected by a torsional beam, i.e. twist-beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8201—Joining by welding

Abstract

본 발명은 CTBA 서스펜션에 관한 것으로서, 좌측 트레일링암 및 우측 트레일링암과; 상기 좌측 트레일링암 및 상기 우측 트레일링암을 연결하며, 와핑 방지부가 마련된 튜블라형 토션빔을 포함하는 것을 특징으로 한다.The present invention relates to a CTBA suspension, comprising: a left trailing arm and a right trailing arm; The tubular torsion beam may be connected to the left trailing arm and the right trailing arm and provided with a warping prevention portion.

이에 의하여, 와핑 현상을 억제함으로써 롤 강성 뿐만 아니라 내구 성능을 향상시킬 수 있다. Thereby, by suppressing the warping phenomenon, not only roll rigidity but also durability performance can be improved.

Description

ＣＴＢＡ 서스펜션{Coupled Torsion Beam Axle Suspension}CCT Suspension {Coupled Torsion Beam Axle Suspension}

본 발명은 CTBA 서스펜션에 관한 것으로서, 보다 상세하게는, 와핑 현상을 방지하여 롤 강성 및 내구력을 향상시킬 수 있는 CTBA 서스펜션에 관한 것이다.The present invention relates to a CTBA suspension, and more particularly, to a CTBA suspension that can improve the roll rigidity and durability by preventing the warping phenomenon.

일반적으로, 차량의 후륜 서스펜션으로는 크게 더블 위시본, 멀티 링크, 세미 트레일링암, CTBA(Coupled Torsion Beam Axle) 등이 있다. In general, the rear suspension of the vehicle is largely a double wishbone, a multi-link, a semi trailing arm, a coupled torque beam axle (CTBA).

이들 중, CTBA 서스펜션(101)은, 도 1에 도시된 바와 같이, 전후 방향으로 길게 뻗어 있는 형상으로 차량을 지지하는 좌측 트레일링암(110) 및 우측 트레일링암(120)과, 좌측 트레일링암(110) 및 우측 트레일링암(120)을 연결하여 차량의 롤 및 횡방향 거동을 억제하는 토션빔(130)과, 스프링 시트(125)로 구성된다. Among them, the CTBA suspension 101, as shown in Figure 1, the left trailing arm 110 and the right trailing arm 120 and the left trailing arm 110 for supporting the vehicle in a shape extending in the front and rear direction, and the left trailing arm 110 ) And the right trailing arm 120 is configured with a torsion beam 130 and a spring seat 125 for suppressing roll and lateral behavior of the vehicle.

여기서, 토션빔(130)은 튜블라형 토션빔으로서 그 단면 형상은 도 2의 (a)와 같은데, 토션빔(130')으로 도 2의 (b)와 같이 V형이 사용될 수도 있다.Here, the torsion beam 130 is a tubular torsion beam, the cross-sectional shape of which is the same as that of FIG. 2 (a). As the torsion beam 130 ', the V type may be used as shown in FIG.

일반적으로 차량의 전륜과 후륜 롤 강성 배분이 적절하지 못하면 차량의 핸들링 성능이 나빠지게 되므로, 핸들링 성능을 개선시키기 위해서는 전륜과 후륜의 롤 강성을 조절해야 한다.In general, if the front wheel and rear wheel stiffness distribution of the vehicle is not appropriate, the handling performance of the vehicle worsens, in order to improve the handling performance, it is necessary to adjust the roll stiffness of the front and rear wheels.

V형 토션빔(130')을 사용하는 CTBA 서스펜션의 경우, 후륜의 롤 강성이 적절 한 수준이 되도록 하기 위해 사용되는 일반적이고 효과적인 방법은 토션바(135')의 직경이나 두께를 조절하는 것인데, 이 방법은 특별히 내구 성능이 저하되는 일 없이 롤 강성을 쉽게 목표 수준으로 맞춰줄 수 있다.In the case of CTBA suspension using the V-shaped torsion beam 130 ', a common and effective method used to ensure proper roll stiffness of the rear wheel is to adjust the diameter or thickness of the torsion bar 135'. This method can easily achieve the roll stiffness to the target level without any deterioration in durability.

반면, 튜블라형 토션빔(130)을 사용하는 CTBA 서스펜션(1)의 경우, 롤 강성을 조절하는 방법으로 튜블라형 토션빔(130)의 단면의 둘레 길이, 혹은 두께를 조절하거나 하단 물방울 형상의 직경을 조절하는 방법을 사용한다. On the other hand, in the case of the CTBA suspension (1) using the tubular torsion beam 130, by adjusting the roll stiffness to adjust the circumferential length or thickness of the cross section of the tubular torsion beam 130, Use the method to adjust the diameter.

그러나, 상기 방법들은 CTBA 서스펜션의 내구 성능이 크게 저하되기 때문에 함부로 바꾸기 어려운 문제가 있었다. 일반적으로, 롤 강성이 커질수록 동일한 롤(좌우 휠 위상차)양에 대해 토션빔(130)에 가해지는 모멘트가 커지게 되므로 튜블라형 토션빔(130)의 내구 성능이 저하되는 것이다.However, these methods have a problem that it is difficult to change unnecessarily because the durability performance of the CTBA suspension is greatly reduced. In general, the greater the rigidity of the roll, the greater the moment applied to the torsion beam 130 for the same amount of roll (left and right wheel phase difference), so that the durability performance of the tubular torsion beam 130 is lowered.

그리고, 튜블라형 토션빔(130)은 일반적으로 V형 토션빔(130')에 비해 내구 성능이 나쁘며, 토션빔(130)의 둘레가 일정하다는 설계 제약과 제작 공법상의 문제로 인해 형상 변경을 이용한 내구 성능 개선이 용이하지 않다.In addition, the tubular torsion beam 130 generally has a poor durability performance compared to the V-type torsion beam 130 ′, and changes in shape due to design constraints and problems in the manufacturing method that the circumference of the torsion beam 130 is constant. It is not easy to improve the durability performance.

그 이유는, 원형 단면이 아닌 부재가 토션을 받을 때 축 방향으로 변위가 발생(와핑 현상)하기 때문이다. 즉, 도 3에 도시된 바와 같이, 토션빔(130)의 단면 형상이 바뀌는 변곡부에 응력이 집중됨으로써 크랙(crack, C)이 발생하는 문제점이 있다.The reason is that displacement occurs in the axial direction (warping phenomenon) when a member other than a circular cross section receives a torsion. That is, as illustrated in FIG. 3, cracks are generated by stress concentration at an inflection portion in which the cross-sectional shape of the torsion beam 130 is changed.

따라서, 본 발명의 목적은 튜블라형 토션빔에서 발생하는 와핑 현상을 억제함으로써 롤 강성을 증대시킬 수 있을 뿐만 아니라, 롤 강성을 크게 할수록 내구 성능이 저하되는 현상을 극복할 수 있는 CTBA 서스펜션을 제공하는 것이다. Accordingly, an object of the present invention is to provide a CTBA suspension that can not only increase roll stiffness by suppressing warping phenomenon occurring in a tubular torsion beam, but also overcome the phenomenon that durability increases with increasing roll stiffness. It is.

상기 목적은 본 발명의 CTBA 서스펜션에 따라, 좌측 트레일링암 및 우측 트레일링암과; 상기 좌측 트레일링암 및 상기 우측 트레일링암을 연결하며, 와핑 방지부가 마련된 튜블라형 토션빔에 의해 달성된다.The object is the left trailing arm and the right trailing arm, according to the CTBA suspension of the present invention; The left trailing arm and the right trailing arm are connected to each other, and are achieved by a tubular torsion beam provided with a warping prevention portion.

여기서, 상기 토션빔은 각 양단부가 물방울 모양으로 연결되는 외측면 및 내측면으로 구성된 것이 바람직하다.Here, the torsion beam is preferably composed of the outer surface and the inner surface of which both ends are connected in the shape of a droplet.

이 때, 상기 와핑 방지부는 상기 외측면에 축 방향으로 일정 길이 형성된 슬롯과; 상기 외측면과 상기 내측면을 연결하는 슬롯 용접면으로 구성된 것이 좋다. At this time, the warping prevention portion and the slot formed in the axial direction on the outer surface; It is preferable that the slot weld surface connecting the outer surface and the inner surface.

또한, 상기 와핑 방지부는 상기 튜블라형 토션빔의 단면 형상이 바뀌는 변곡부에 마련된 것이 바람직하다. In addition, the anti-warping portion is preferably provided in the inflection portion of the cross-sectional shape of the tubular torsion beam is changed.

이상 설명한 바와 같이, 본 발명에 따르면, 와핑 현상을 방지하여 롤 강성 및 내구력을 향상시킬 수 있는 차량의 CTBA 서스펜션이 제공된다. As described above, according to the present invention, there is provided a CTBA suspension of a vehicle that can prevent warping and improve roll rigidity and durability.

이하에서는 첨부도면을 참조하여 본 발명에 대해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 4는 본 발명에 따른 CTBA 서스펜션을 도시한 평면도로서, 본 발명에 따른 CTBA 서스펜션(1)은 전후 방향으로 길게 뻗어 있는 형상으로 차량을 지지하는 좌측 트레일링암(10) 및 우측 트레일링암(20)과, 좌측 트레일링암(10) 및 우측 트레일링암(20)을 연결하여 차량의 롤 및 횡방향 거동을 억제하는 튜블라형 토션빔(30)으로 구성된다. 4 is a plan view showing a CTBA suspension according to the present invention, the CTBA suspension 1 according to the present invention is a left trailing arm 10 and a right trailing arm 20 for supporting the vehicle in a shape extending in the front and rear direction. And a tubular torsion beam 30 which connects the left trailing arm 10 and the right trailing arm 20 to suppress roll and lateral behavior of the vehicle.

튜블라형 토션빔(30)은, 도 5와 같이 외측면(31) 및 내측면(32)으로 구성되고, 외측면(31) 및 내측면(32)의 각 양단부(A)는 물방울 모양으로 연결 형성된다. The tubular torsion beam 30 is composed of an outer surface 31 and an inner surface 32 as shown in FIG. 5, and both ends A of the outer surface 31 and the inner surface 32 have a droplet shape. Connection is formed.

이 때, 튜블라형 토션빔(30)에는 토션을 받을 때 축 방향으로 변위가 발생하는 현상, 일명 와핑 현상을 방지하기 위한 와핑 방지부(40)가 마련된다. In this case, the tubular torsion beam 30 is provided with a warping prevention part 40 for preventing a phenomenon in which the displacement occurs in the axial direction when the torsion is received, also known as a warping phenomenon.

와핑 방지부(40)는 토션빔(30)의 단면 형상이 바뀌는 변곡부(M)에 마련되는 것이 좋은데, 그 이유는 와핑 현상은 단면 형상에 따라 거동이 다르게 나타나 변곡부(M)에서 응력 집중이 크게 발생하기 때문이다.The anti-warping part 40 may be provided at the inflection portion M in which the cross-sectional shape of the torsion beam 30 is changed. The reason for this is that the warping phenomenon is different in behavior depending on the cross-sectional shape. This is because it occurs greatly.

여기서, 와핑 방지부(40)는, 도 5에 도시된 바와 같이, 토션빔(30)의 외측면(31)에 축 방향(상하 방향)으로 일정 길이로 형성된 슬롯(41)과, 외측면(31)과 내측면(32)을 연결하는 슬롯 용접면(42)으로 구성된다. 즉, 변곡 시작부로부터 내측으로 대략 30~50mm 지점의 외측면(31)에 슬롯(41)을 만든 후(도 5의 (a)), 외측면(31) 및 내측면(32)을 슬롯 용접으로 연결함으로써(도 5의 (b)), 축 방향 변위가 구속되어 변곡부(M)에 응력이 집중되는 현상이 완화될 수 있다. Here, the warping prevention part 40, as shown in Figure 5, the slot 41 and the outer surface formed in a predetermined length in the axial direction (up and down direction) on the outer surface 31 of the torsion beam 30 ( 31 and the slot weld face 42 connecting the inner face 32. That is, after the slot 41 is made on the outer surface 31 at an approximately 30-50 mm point inward from the inflection start (FIG. 5 (a)), the outer surface 31 and the inner surface 32 are slot welded. (B) of FIG. 5, the phenomenon in which the axial displacement is constrained to concentrate stresses on the inflection portion M may be alleviated.

이와 같이, 와핑 방지부(40)에 의해 와핑 현상이 억제되면, 도 6에서 비교해 볼 수 듯이, 본 발명의 튜블라형 토션빔(30)은 종래의 튜블라형 토션빔(130)에 비 해 응력이 집중되는 정도가 현저히 감소하여 롤 강성 뿐만 아니라 내구 성능이 향상됨을 알 수 있었다. As described above, when the warping phenomenon is suppressed by the anti-warping part 40, as compared with FIG. 6, the tubular torsion beam 30 of the present invention is compared with the conventional tubular torsion beam 130. It was found that the degree of stress concentration was significantly reduced, thereby improving durability as well as roll rigidity.

또한, 튜블라형 토션빔(30)의 단면의 둘레 길이, 혹은 두께를 바꾸거나 물방울 형상(A)의 직경을 조절하는 등의 어려운 방법을 채택하지 않고 간단한 작업으로 와핑 현상을 방지할 수 있으므로, 제작이 용이한 이점이 있다. In addition, since the warping phenomenon can be prevented by a simple operation without adopting a difficult method such as changing the circumferential length or thickness of the cross section of the tubular torsion beam 30 or adjusting the diameter of the droplet shape A, There is an advantage that it is easy to manufacture.

도 1은 종래 CTBA 서스펜션을 도시한 평면도. 1 is a plan view showing a conventional CTBA suspension.

도 2의 (a)는 튜블라형 토션빔을 나타낸 단면도, (b)는 V형 토션빔을 나타낸 단면도.Figure 2 (a) is a cross-sectional view showing a tubular torsion beam, (b) is a cross-sectional view showing a V-type torsion beam.

도 3은 튜블라형 토션빔에 응력이 집중된 상태를 나타낸 단면도.3 is a cross-sectional view showing a state in which stress is concentrated in a tubular torsion beam;

도 4는 본 발명에 따른 CTBA 서스펜션을 도시한 평면도.4 is a plan view of the CTBA suspension according to the present invention;

도 5의 (a)는 도 2의 토션빔의 외측면에 슬롯이 형성된 상태를 도시한 단면도, (b)는 (a)에 슬롯 용접한 상태를 도시한 단면도.(A) is sectional drawing which shows the state in which the slot was formed in the outer surface of the torsion beam of FIG. 2, (b) is sectional drawing which shows the state of slot welding in (a).

도 6의 (a)는 종래 CTBA 서스펜션에서 토션빔의 응력 분포를 나타낸 도면, (b)는 본 발명의 CTBA 서스펜션에서 토션빔의 응력 분포를 나타낸 도면.Figure 6 (a) is a view showing the stress distribution of the torsion beam in the conventional CTBA suspension, (b) is a view showing the stress distribution of the torsion beam in the CTBA suspension of the present invention.

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

1 : CTBA 서스펜션 10 : 좌측 트레일링암1: CTBA suspension 10: Left trailing arm

20 : 우측 트레일링암 30 : 토션빔20: right trailing arm 30: torsion beam

31 : 외측면 32 : 내측면31: outer side 32: inner side

40 : 와핑 방지부 41 : 슬롯40: warping prevention part 41: slot

42 : 슬롯 용접면42: slot weld face

Claims (4)

좌측 트레일링암 및 우측 트레일링암과;Left trailing arm and right trailing arm; 각 양단부가 물방울 모양으로 연결되는 외측면 및 내측면으로 구성되어 상기 좌측 트레일링암 및 상기 우측 트레일링암을 연결하며, 단면 형상이 바뀌는 변곡부에 와핑 방지부가 마련된 튜블라형 토션빔을 포함하며,It comprises a tubular torsion beam, each end is composed of an outer surface and an inner surface connected in a droplet shape to connect the left trailing arm and the right trailing arm, the warping portion is provided in the inflection section of the cross-sectional shape, 상기 와핑 방지부는 상기 외측면에 축 방향으로 일정 길이 형성된 슬롯과, 상기 외측면과 상기 내측면을 연결하는 슬롯 용접면으로 구성된 것을 특징으로 하는 CTBA 서스펜션.The warping prevention portion CTBA suspension, characterized in that consisting of a slot formed in a predetermined length in the axial direction on the outer surface, and a slot welding surface connecting the outer surface and the inner surface. 삭제delete 삭제delete 삭제delete
KR1020090076259A 2009-08-18 2009-08-18 Coupled Torsion Beam Axle Suspension KR101081141B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8857835B2 (en) 2012-11-02 2014-10-14 Sungwoo Hitech Co., Ltd. Rear suspension system of coupled torsion beam axle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8857835B2 (en) 2012-11-02 2014-10-14 Sungwoo Hitech Co., Ltd. Rear suspension system of coupled torsion beam axle

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