KR20030092621A - Low arm with difference thickness in suspension - Google Patents

Low arm with difference thickness in suspension Download PDF

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Publication number
KR20030092621A
KR20030092621A KR1020020030343A KR20020030343A KR20030092621A KR 20030092621 A KR20030092621 A KR 20030092621A KR 1020020030343 A KR1020020030343 A KR 1020020030343A KR 20020030343 A KR20020030343 A KR 20020030343A KR 20030092621 A KR20030092621 A KR 20030092621A
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KR
South Korea
Prior art keywords
lower arm
suspension
plate members
thickness
divided
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KR1020020030343A
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Korean (ko)
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KR100452203B1 (en
Inventor
이원재
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현대자동차주식회사
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Priority to KR10-2002-0030343A priority Critical patent/KR100452203B1/en
Publication of KR20030092621A publication Critical patent/KR20030092621A/en
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Publication of KR100452203B1 publication Critical patent/KR100452203B1/en

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    • 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
    • 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
    • B60G2206/10—Constructional features of arms
    • 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
    • B60G2206/10—Constructional features of arms
    • B60G2206/122—Constructional features of arms the arm having L-shape
    • 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
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7104—Thermoplastics
    • 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
    • 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
    • B60G2400/60—Load

Abstract

PURPOSE: A lower arm with different thickness for a suspension is provided to strengthen the rigidity of a relatively weak part by dividing the lower arm into parts having different thickness and to improve the durability of the weak part of the lower arm combined to the vehicle body without changing the design, increasing the total thickness of the lower arm and using a reinforcing member. CONSTITUTION: A lower arm(1) with different thickness for a suspension is composed of upper and lower sheet plate members(2,3) mutually welded and combined, and made by dividing a fixing end(4") applied with main load(F) and fixing ends(4,4') combined to the vehicle body into first and second division parts(A,B), welding and combining the fixing ends. The thickness of the upper and lower sheet plate members forming the second division part is relatively thicker than the upper and lower sheet plate members forming the first division part.

Description

두께 차이를 갖는 현가장치용 로워암{Low arm with difference thickness in suspension}Lower arm with difference thickness in suspension

본 발명은 두께 차이를 갖는 현가장치용 로워암에 관한 것으로, 보다 상세하게는 차체 쪽으로 결합되는 강성 취약부위의 두께를 강화시켜 강성을 향상할 수 있도록 된 두께 차이를 갖는 현가장치용 로워암에 관한 것이다.The present invention relates to a lower arm for suspension having a difference in thickness, and more particularly, to a lower arm for suspension having a thickness difference to improve the rigidity by strengthening the thickness of the weak rigid portion coupled to the vehicle body. will be.

일반적으로 차량의 현가장치의 기본형식은 좌·우륜을 1개의 차축으로 연결하는 구조와 좌·우륜이 독립하여 운동할 수 있도록 하는 구조로 크게 나누어지는데, 이중 1개의 차축으로 연결하는 구조는 리지드 액슬 서스펜션이라 하면서 좌·우륜을 1개의 차축으로 연결한 형식의 서스펜션으로 차축과 차체를 결합하는 구조의 상이점에따라 다시 몇 가지 종류로 구분되며 또한 그 특성은 차륜이 상·하 운동할 때, 좌·우륜이 연결되어 있으므로 얼라인먼트 변화가 작고, 타이어의 마모가 작다는 장점이 있으며 구조가 간단하고 연가로 제조할 수 있게 된다.In general, the basic form of the suspension system of the vehicle is largely divided into a structure in which the left and right wheels are connected to one axle and a structure in which the left and right wheels can move independently, of which the structure connected to one axle is a rigid axle. The suspension is a type of suspension that connects the left and right wheels with one axle, and is divided into several types according to the difference of the structure that combines the axle and the body, and the characteristics are different when the wheel moves up and down. Since the right wheel is connected, there is an advantage that the alignment change is small, the wear of the tire is small, and the structure is simple and it can be manufactured with fuel.

이에 비해, 좌·우륜이 독립하여 운동할 수 있도록 하는 구조는 독립현가장치라 불리며 스트럿식과 세미트레일링아암식 등이 있게 되며 또한 그 특성은 차축을 지지하는 것이 아니므로 스프링하의 중량이 가벼워서 차륜의 접지성과 조정성이 양호하며, 얼라인먼트의 설계자유도가 크고, 방진방법의 자유도가 있으며 소음이나 진동방지에 유리하다는 장점을 가진 것이다.On the other hand, the structure that allows the left and right wheels to move independently is called an independent suspension device, and there are strut type and semi-trailing arm type, and its characteristics are not to support the axle. Good grounding and controllability, good design freedom of alignment, freedom of dust-proof method, and advantageous to prevent noise or vibration.

이와 같이 독립현가장치의 장점으로 인해 현재 승용차의 전륜의 현가장치로 사용되고 있는데, 이는 다시 스윙액슬식 서스펜션과 트렐링아암식 서스펜션, 스트럿식 서스펜션, 더블위시본식 서스펜션 및 마르트 링크식 서스펜션 등으로 구분된다.As a result of the advantages of the independent suspension system, it is currently used as the suspension of the front wheels of passenger cars, which are divided into swing axle suspension, tractive arm suspension, strut suspension, double wishbone suspension, and march link suspension. .

이와 같은 스트럿식 서스펜션은 쇽업소버를 휠 위치의 결정을 위한 지주 즉, 스트럿으로 이용하고 있는 서스펜션을 말하므로, 스트럿의 상부는 고무제의 인슐레이터를 거쳐 차체에 고정되는 반면 스트럿의 하부는 조향너클이나 액슬하우징에 강체 결합되는데 이때, 상기 너클은 볼조인트를 매개로 차체측을 고무부시를 통하여 2점에서 결합하는 L형과 I형+텐션로드형 및 A형 등의 종류를 갖는 로워아암(또는 트랜스버스 링크)의 선단에 장착되어진다.This strut-type suspension refers to a suspension using the shock absorber as a strut for determining the wheel position, that is, the strut. Therefore, the upper part of the strut is fixed to the vehicle body through a rubber insulator, while the lower part of the strut is a steering knuckle. In this case, the knuckle is a lower arm (or transformer) having a type such as L type, I type + tension rod type, and A type that couples the vehicle body side through two rubber bushes through a ball joint. Bus link).

이와 같은 로워아암(1)은 도 1에 도시된 바와 같이 휠의 조향너클(도시안됨)과 일단이 결합되고 타단이 각각 사이드멤버(S)와 대시패널부위에 접해있는 부분으로 각각 결합되는데, 이러한 로워아암(1)은 충격하중이 어느정도 이상으로 들어오면 소성 변형을 일으켜 타 부품에 손상이 가지 않도록 하면서 또한 진동적인 측면에서 어느 정도 이상의 강성을 가져 공진 가능성을 제거함은 물론 내구적 측면에서도 하중 작용시 최대 응력이 요구되는 내구 강도보다 작아야 만 되는 특성을 갖게 된다.As shown in FIG. 1, the lower arm 1 is coupled to a steering knuckle (not shown) of one of the wheels and the other end thereof is in contact with the side member S and the dash panel, respectively. The lower arm (1) causes plastic deformation when the impact load exceeds a certain level, and prevents damage to other parts. It also has a certain degree of rigidity in terms of vibration, and eliminates the possibility of resonance as well as load in terms of durability. It has a characteristic that the maximum stress must be smaller than the required endurance strength.

또한, 상기 로워아암은 통상 주물로 제조되거나 또는 단조 공법이나 또는 프레스 공법으로 제조되어지는데, 이중 프레스 공법으로 제조하게 되면 도 2에 도시된 바와 같이 로워아암의 전체적인 형상으로 각각 별도의 상·하부박판부재(2,3)를 제작한 다음, 이 부재(2,3)를 서로 포개어 대응되는 접촉부위를 용접으로 붙여 일체형상으로 제조한 후 상기 부재(2,3)의 각 모서리부위로 일체로나 별도의 고정단(4,4',4")을 용접하여 장착하게 된다.In addition, the lower arm is usually manufactured by casting or forging method or press method, if manufactured by the double press method, as shown in Figure 2 as the overall shape of the lower arm, respectively, separate upper and lower plates After the members 2 and 3 are fabricated, the members 2 and 3 are superimposed on each other, and the corresponding contact parts are welded to form a single piece, and then the corners of the members 2 and 3 are integrally or separately separated. The fixed ends 4, 4 ', 4 "of the welding are mounted.

그러나, 이와 같은 로워아암(1)은 차체에 지지되는 고정단(4,4')부위에 비해 차륜으로부터 주하중(F)이 고정단(4")으로 집중되는 특성이 있고 이에 따라, 상기 로워아암(1)의 고정단(4,4')이 형성되는 선상부에 내구성이 취약한 취약부(K)가 형성되는 문제가 있다.However, such a lower arm 1 has a characteristic that the main load F is concentrated from the wheel to the fixed end 4 "compared to the fixed end 4, 4 'portion supported by the vehicle body, and thus, the lower arm There exists a problem that the weak part K which is weak in durability is formed in the linear part in which the fixed end 4, 4 'of the arm 1 is formed.

이에 따라, 이와 같은 로워아암(1)의 취약부(K)부위에 대한 내구성을 강화시키 위해 로워아암(1)전체 두께를 강화시킬 수 도 있으나 이는 불필요한 곳까지 강도를 높여주는 과도한 설계하는 한계를 갖는 문제가 있게 된다.Accordingly, the entire thickness of the lower arm 1 may be strengthened in order to enhance durability of the weak part K of the lower arm 1, but this has an excessive design limit that increases strength to an unnecessary place. There is a problem.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 로워아암을 서로 다른 두께를 갖는 부분으로 분할해 상대적으로 약한 강성부위에 대한 강성을 강화하면서도 설계 변경이 거의 없고 중량의 증가도 거의 발생하지 않도록 함에 그 목적이 있다.Accordingly, the present invention has been invented in view of the above, and the lower arm is divided into portions having different thicknesses to enhance rigidity for relatively weak stiffness, but there is little design change and almost no increase in weight occurs. The purpose is to avoid it.

상기와 같은 목적을 달성하기 위한 본 발명은, 로워아암(1)이 서로 용접결합되는 상·하부박판부재(2,3)를 주하중(F)이 작용하는 고정단(4")부위와 취약부(K)를 형성하는 고정단(4,4')부위를 제1분할파트(A)와 제2분할파트(B)로 각각 소정 영역으로 분할해 용접결합하되, 상기 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)의 두께를 제1분할파트(A)를 형성하는 상·하부박판부재(2,3)의 두께에 비해 상대적으로 두껍게 형성하는 것을 특징으로 한다.According to the present invention for achieving the above object, the upper and lower thin plate members 2 and 3 to which the lower arm 1 is welded to each other, the fixed end (4 ") portion and the weak portion to which the main load (F) acts. The fixed end (4, 4 ') forming the portion (K) is divided into a predetermined area by the first divided part (A) and the second divided part (B), respectively, and welded, but the second divided part (B) It is characterized in that the thickness of the upper and lower plate members (2, 3) to form a relatively thicker than the thickness of the upper and lower plate members (2, 3) to form a first divided part (A).

도 1은 일반적인 현가장치의 로워아암 장착 상태도1 is a lower arm mounted state of a typical suspension device

도 2는 종래에 따른 로워아암의 분리 사시도Figure 2 is an exploded perspective view of the lower arm according to the prior art

도 3은 본 발명에 따른 두께 차이를 갖는 로워암의 사시도3 is a perspective view of a lower arm having a thickness difference according to the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

1 : 로워아암2 : 상부박판부재1: Lower arm 2: Upper thin plate member

3 : 하부박판부재4,4',4" : 고정단3: lower sheet member 4,4 ', 4 ": fixed end

A : 제1분할파트B : 제2분할파트A: First divided part B: Second divided part

F : 주하중K : 취약부F: Main load K: Vulnerable part

T,t : 두께T, t: thickness

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3은 본 발명에 따른 두께 차이를 갖는 로워암의 사시도를 도시한 것인바, 본 발명은 휠의 조향너클과 일단이 결합되고 타단이 각각 사이드멤버(S)와 대시패널부위에 접해있는 부분으로 각각 결합되는 로워아암(1)이 전체적인 형상으로 각각 별도로 제작된 상·하부박판부재(2,3)로 이루어지되, 이 상·하부박판부재(2,3)는 주하중(F)이 작용하는 고정단(4")부위와 취약부(K)를 형성하는 고정단(4,4')부위를 제1분할파트(A)와 제2분할파트(B)로 각각 소정 영역으로 분할해 용접하고, 상기 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)의 두께(T)를 제1분할파트(A)를 형성하는 상·하부박판부재(2,3)의 두께(t)에 비해 상대적으로 두껍게 형성하게 된다.Figure 3 shows a perspective view of a lower arm having a thickness difference according to the present invention, the present invention is a portion that is coupled to the steering knuckle and one end of the wheel and the other end is in contact with the side member (S) and the dash panel, respectively. The lower arm 1, which is coupled to each other, is made up of upper and lower thin plate members 2 and 3 separately manufactured in an overall shape, and the upper and lower thin plate members 2 and 3 have a main load F. The fixed end 4 "and the fixed end 4 and 4 'which form the weak part K are divided and welded into the predetermined | prescribed area by the 1st division part A and the 2nd division part B, respectively, The thickness T of the upper and lower thin plate members 2 and 3 forming the second divided part B is the thickness T of the upper and lower thin plate members 2 and 3 forming the first divided part A. It is relatively thick compared to t).

여기서, 상기 제1분할파트(A)와 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)는 서로 다른 이종재질로 이루어질 수 도 있음은 물론이다.Here, the upper and lower plate members 2 and 3 forming the first divided part A and the second divided part B may be made of different dissimilar materials.

이에 따라, 본 발명은 프레스 공법으로 로워아암(1)의 전체적인 형상에 맞게 각각 별도의 상·하부박판부재(2,3)를 제작할 때, 이 상·하부박판부재(2,3)를 주하중(F)이 작용하는 고정단(4")부위와 취약부(K)를 형성하는 고정단(4,4')부위를 제1분할파트(A)와 제2분할파트(B)로 나누어 각각 4개의 부분으로 제작하게 된다.Accordingly, in the present invention, when the upper and lower thin plate members 2 and 3 are manufactured to match the overall shape of the lower arm 1 by the press method, the upper and lower thin plate members 2 and 3 are mainly loaded. The fixed end (4 ") portion (F) acting and the fixed end (4,4 ') portion forming the weak part (K) are divided into a first divided part (A) and a second divided part (B), respectively. It is made of parts of dogs.

이때, 상기 상·하부박판부재(2,3)의 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)의 두께(T)를 제1분할파트(A)를 형성하는 상·하부박판부재(2,3)의 두께(t)에 비해 상대적으로 두껍게 형성하게 되는데 예를 들면, 상기 제2분할파트(B)의 두께(T)가 3,7mm이면 상기 제1분할파트(A)의 두께(t)를 2.8mm로 하게 된다.At this time, the thickness T of the upper and lower thin plate members 2 and 3 forming the second divided part B of the upper and lower thin plate members 2 and 3 is formed to form the first divided part A. The thickness of the upper and lower thin plate members 2 and 3 is relatively thick. For example, when the thickness T of the second divided part B is 3,7 mm, the first divided part The thickness t of (A) is set to 2.8 mm.

이어, 상기 제1분할파트(A)를 이루는 상·하부박판부재(2,3)를 서로 용접 결합하고 또한, 상기 제2분할파트(B)를 이루는 상·하부박판부재(2,3)를 서로 용접 결합한 후, 이어 상기 제1·2분할파트(A,B)를 이루는 상·하부박판부재(2,3)를 용접 결합해 로워아암(1)을 형성하게 된다.Subsequently, the upper and lower thin plate members 2 and 3 forming the first divided part A are welded to each other and the upper and lower thin plate members 2 and 3 forming the second divided part B are welded to each other. After welding to each other, the lower and lower plate members 2 and 3 constituting the first and second divided parts A and B are then welded to form a lower arm 1.

이와 같이 서로 두께가 다른 영역으로 이루어진 로워아암(1)은 차체에 지지되는 고정단(4,4')부위에 비해 차륜으로부터 주하중(F)이 고정단(4")으로 집중되더라도, 상기 로워아암(1)의 고정단(4,4')이 형성되는 제2분할파트(B)영역이 주하중(F)이 집중되는 고정단(4")의 제1분할파트(A)에 비해 상대적으로 그 두께가 두꺼우므로 충분한 내구성을 갖추게 됨은 무론이다.Thus, the lower arm 1, which is composed of regions having different thicknesses, has the lower arm even when the main load F is concentrated from the wheel to the fixed end 4 "compared to the fixed ends 4 and 4 'supported by the vehicle body. The area of the second divided part B where the fixed ends 4 and 4 'of the arm 1 are formed is relative to the first divided part A of the fixed end 4 "where the main load F is concentrated. The thickness is so thick that it will have sufficient durability.

한편, 이와 같은 본 발명에 따른 로워암(1)은 그 제작시 합체박판(Tailored Welded Blank)방식으로 제조될 수 도 있음은 물론이며, 이에 따른 로워암의 구조는 동일하게 이루어짐은 물론이다.On the other hand, the lower arm (1) according to the present invention may be manufactured in a combined welded blank (Tailored Welded Blank) method at the time of manufacture, of course, the structure of the lower arm is made of the same.

이상 설명한 바와 같이 본 발명에 의하면, 로워아암을 서로 다른 두께를 갖는 부분으로 분할해 상대적으로 약한 강성부위에 대한 강성을 강화하면서도 설계 변경이나 로워아암 전체 두께를 증가시키거나 별도의 보강부재를 사용하지 않고서도 차체에 결합되는 로워아암의 취약부위에 대한 내구성을 강화시킬 수 있는 효과가 있게 된다.As described above, according to the present invention, the lower arm is divided into portions having different thicknesses, thereby increasing the rigidity of the relatively weak rigid portion, while not changing the design, increasing the overall thickness of the lower arm, or using a separate reinforcing member. It is possible to enhance the durability of the weak portion of the lower arm coupled to the body without.

Claims (2)

서로 용접결합되는 상·하부박판부재(2,3)를 주하중(F)이 작용하는 고정단(4")부위와 차체에 결합되는 고정단(4,4')부위를 제1분할파트(A)와 제2분할파트(B)로 각각 분할해 용접 결합하되, 상기 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)의 두께를 제1분할파트(A)를 형성하는 상·하부박판부재(2,3)의 두께에 비해 상대적으로 두껍게 형성한 두께 차이를 갖는 현가장치용 로워암.The upper and lower plate members 2 and 3, which are welded to each other, are fixed to the fixed end 4 "portion where the main load F acts and the fixed end 4,4 'portion coupled to the vehicle body. A) and the second divided part (B) is divided into each of the welded, but the thickness of the upper and lower plate members (2, 3) forming the second divided part (B) is divided into the first divided part (A). A lower arm for suspension apparatus having a thickness difference formed relatively thicker than the thickness of upper and lower thin plate members 2 and 3 to be formed. 제 1항에 있어서, 상기 제1분할파트(A)와 제2분할파트(B)를 형성하는 상·하부박판부재(2,3)는 서로 다른 이종재질로 이루어지는 것을 특징으로 하는 두께 차이를 갖는 현가장치용 로워암.The upper and lower plate members (2, 3) forming the first divided part (A) and the second divided part (B) have different thicknesses, characterized in that they are made of different materials. Lower arm for suspension.
KR10-2002-0030343A 2002-05-30 2002-05-30 Low arm with difference thickness in suspension KR100452203B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017132063A (en) * 2016-01-25 2017-08-03 株式会社Ｓｕｂａｒｕ Fiber reinforced resin structure
KR102088127B1 (en) * 2019-01-24 2020-03-11 주식회사 새해성 Bending member supply for welding of bush members of low arm for motor vehicles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08197922A (en) * 1995-01-23 1996-08-06 Suzuki Motor Corp Suspension arm
JPH08318722A (en) * 1995-03-23 1996-12-03 Toyota Motor Corp Suspension arm
JP3191654B2 (en) * 1995-08-30 2001-07-23 トヨタ自動車株式会社 Suspension arm
KR19990019398A (en) * 1997-08-29 1999-03-15 양재신 Damper for vehicle engine mounting
KR200200800Y1 (en) * 2000-05-17 2000-10-16 주식회사화신 Law-arm for automobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017132063A (en) * 2016-01-25 2017-08-03 株式会社Ｓｕｂａｒｕ Fiber reinforced resin structure
KR102088127B1 (en) * 2019-01-24 2020-03-11 주식회사 새해성 Bending member supply for welding of bush members of low arm for motor vehicles

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