KR100552768B1

KR100552768B1 - mounting structure of chassis rear cross member for vehicle

Info

Publication number: KR100552768B1
Application number: KR1020040029973A
Authority: KR
Inventors: 주재갑; 김기창
Original assignee: 현대자동차주식회사
Priority date: 2004-04-29
Filing date: 2004-04-29
Publication date: 2006-02-20
Also published as: KR20050104629A

Abstract

본 발명은 자동차용 섀시리어크로스멤버의 조립구조에 관한 것으로, 리어플로어사이드멤버(5)의 내부공간에 위치되어 리어플로어사이드멤버(5)에 용접결합되는 보강브라켓트(11)는 평판모양으로 형성되면서 그 양단은 리어플로어사이드멤버(5)의 안쪽 측면과 용접결합되고, 차체리어크로스멤버(4)와 리어플로어사이드멤버(5) 및 보강브라켓트(11)에는 차체의 상하방향으로 수직하게 관통되는 볼트구멍(4a,5a,11a)이 각각 형성되며, 상기 보강브라켓트(11)상에는 용접너트(13)가 볼트구멍(11a)과 연결되도록 결합되고, 상기 차체리어크로스멤버(4)의 밑면에는 와셔형너트(15) 및 섀시리어크로스멤버(2)의 단부가 볼트구멍(4a)과 연결되도록 중첩되어, 상기 섀시리어크로스멤버(2)를 관통하여 와셔형너트(15)에 체결되고 계속해서 상기 볼트구멍(4a,5a,11a)을 관통하여 용접너트(13)에 체결되는 볼트(3)를 통해 상기 섀시리어크로스멤버(2)의 조립이 이루어지게 됨으로써, 차량의 도장공정시 완전한 수세공정과 전착공정이 진행될 수 있게 되어 녹의 발생을 방지하는 방청기능을 대폭 증대시킬 수 있도록 된 것이다.The present invention relates to an assembly structure of a chassis rear cross member for automobiles, wherein the reinforcing bracket 11 positioned in the inner space of the rear floor side member 5 and welded to the rear floor side member 5 is formed in a flat plate shape. While both ends are welded to the inner side of the rear floor side member (5), the vehicle body cross member (4) and the rear floor side member (5) and the reinforcing bracket (11) vertically penetrates vertically in the vehicle body Bolt holes 4a, 5a, and 11a are formed, respectively, on the reinforcing bracket 11, a welding nut 13 is coupled to be connected to the bolt hole 11a, and a washer is provided on the bottom of the vehicle body cross member 4. Ends of the mold nut 15 and the chassis rear cross member 2 overlap with the bolt holes 4a, are fastened to the washer nut 15 through the chassis rear cross member 2, and subsequently Through the bolt holes 4a, 5a, 11a By assembling the chassis rear cross member 2 through the bolt 3 fastened to the folding nut 13, the complete washing and electrodeposition process can be performed during the painting process of the vehicle, thereby preventing the occurrence of rust. The antirust function can be greatly increased.

Description

Mounting structure of chassis rear cross member for vehicle}

도 1은 섀시리어크로스멤버의 조립구조를 보여주는 분리사시도,1 is an exploded perspective view showing the assembly structure of the chassis rear cross member,

도 2와 도 3은 섀시리어크로스멤버의 종래 조립구조를 설명하기 위한 사시도 및 종단면도,2 and 3 are a perspective view and a longitudinal sectional view for explaining a conventional assembly structure of the chassis rear cross member,

도 4와 도 5는 본 발명에 따른 섀시리어크로스멤버의 조립구조를 설명하기 위한 분리사시도 및 분리상태의 종단면도,4 and 5 are exploded perspective view and longitudinal cross-sectional view for explaining the assembly structure of the chassis rear cross member according to the present invention;

도 6과 도 7은 결합상태의 단면을 보여주는 사시도이다.6 and 7 are perspective views showing a cross section of the coupling state.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

2 - 섀시리어크로스멤버 3 - 볼트2-Chassis Rear Cross Member 3-Bolt

4 - 차체리어크로스멤버 5 - 리어플로어사이드멤버4-Car Rear Cross Member 5-Rear Floor Side Member

6 - 리어플로어패널 4a,5a,11a - 볼트구멍6-rear floor panels 4a, 5a, 11a-bolt holes

4b,5b - 경사홈 4c,5c - 평면부4b, 5b-Inclined groove 4c, 5c-Flat part

13 - 용접너트 11 - 보강브라켓트13-Weld Nut 11-Reinforced Bracket

11b - 평면부 11c - 경사부11b-flat 11c-slope

11d - 수직부 15 - 와셔형너트11d-Vertical 15-Washer Nut

15a - 하부돌출부 15b - 플랜지부15a-Lower protrusion 15b-Flange

15c - 상부돌출부15c-top projection

본 발명은 자동차용 섀시리어크로스멤버의 조립구조에 관한 것으로, 특히 녹의 발생을 방지하는 방청기능을 향상시키도록 하고 더불어 제조공정의 단순화를 통해 작업의 편의성 및 생산성의 증대를 이룩할 수 있도록 하는 자동차용 섀시리어크로스멤버의 조립구조에 관한 것이다.The present invention relates to an assembly structure of a chassis rear cross member for an automobile, and in particular, to improve the rust prevention function to prevent the occurrence of rust and to increase the convenience and productivity of the work through the simplification of the manufacturing process. It relates to the assembly structure of the chassis rear cross member.

일반적으로, 승용차와 같은 차량에는 도 1에 도시된 바와 같이 전후방의 저면에 섀시프런트크로스멤버(1) 및 섀시리어크로스멤버(2)가 각각 볼트(3)에 의해 조립되어 차량의 섀시 관련 부품들을 보강시키게 된다.In general, in a vehicle such as a passenger car, the chassis front cross member 1 and the chassis rear cross member 2 are assembled by bolts 3 on the front and rear bottoms thereof, as shown in FIG. It is reinforced.

이중, 상기 섀시리어크로스멤버(2)의 종래 조립구조를 단면도를 이용하여 살펴보면 도 2와 도 3에 도시된 바와 같다.Of these, the conventional assembly structure of the chassis rear cross member (2) using a cross-sectional view as shown in Figs.

즉, 차체리어크로스멤버(4)는 그 양단이 리어플로어사이드멤버(5)의 측면 및 저면과 중첩되어 용접결합을 통해 설치됨으로써 차체의 골격을 구성하게 되고, 리어플로어패널(6)은 차체리어크로스멤버(4) 및 리어플로어사이드멤버(5)의 윗면에 중첩되어 용접결합됨으로써 실내의 리어부를 구성하게 된다.That is, the car rear cross member 4 has both ends overlapped with the side and bottom of the rear floor side member 5 to be installed by welding to form a skeleton of the car body, and the rear floor panel 6 is a car rear By overlapping and welding to the upper surfaces of the cross member 4 and the rear floor side member 5 to form a rear portion of the room.

그리고, 리어플로어패널(6)에 의해 상부가 덮혀지는 상기 리어플로어사이드멤버(5)의 내부공간은 이를 횡방향으로 구획하는 보강브라켓트(7)에 의해 상부폐공간(8a)과 하부폐공간(8b)으로 형성된다.In addition, the inner space of the rear floor member 5 covered with the upper by the rear floor panel 6 is the upper closed space (8a) and lower closed space ( 8b).

즉, 상기 보강브라켓트(7)는 도시된 바와 같이 차체의 측방향을 향하는 양측면과 차체의 전후방향을 향하는 전후면에는 각각 플랜지가 형성되는데, 양측면의 플랜지는 리어플로어사이드멤버(5)의 안쪽 측면과 각각 면접촉되어 용접결합을 통해 설치되고, 전후방의 플랜지는 리어플로어사이드멤버(5)의 안쪽 바닥면과 면접촉되어 용접결합을 통해 설치됨으로써, 상기 리어플로어사이드멤버(5)와 리어플로어패널(6)에 의해 형성되는 내부의 밀폐공간을 상하의 적층구조를 갖는 이중의 폐공간(8a,8b)으로 구획하게 된다.That is, the reinforcement brackets 7 have flanges formed on both side surfaces facing the lateral direction of the vehicle body and the front and rear surfaces facing the front and rear direction of the vehicle body as shown, and the flanges of both sides are the inner side surfaces of the rear floor side member 5. The front and rear flanges are respectively installed in contact with each other, and the front and rear flanges are in surface contact with the inner bottom surface of the rear floor side member 5 and are installed through the welding connection, thereby providing the rear floor side member 5 and the rear floor panel. The interior sealed space formed by (6) is partitioned into double closed spaces 8a and 8b having a vertically stacked structure.

또한, 상기 리어플로어사이드멤버(5)의 바닥면과 이에 중첩되는 차체리어크로스멤버(4)에는 파이프너트(9)의 하단부가 관통하게 되는 바, 이때 상기 파이프너트(9)의 외주면에 구비된 플랜지(9a)가 상기 리어플로어사이드멤버(5)의 바닥면과 용접결합됨으로써 설치되어 진다.In addition, the lower surface of the pipe nut 9 penetrates the bottom surface of the rear floor side member 5 and the vehicle body cross member 4 overlapping with the bottom surface of the rear floor side member 5. The flange 9a is provided by welding to the bottom surface of the rear floor side member 5.

그리고, 상기 파이프너트(9)의 상단부는 보강브라켓트(7)를 관통하여 그 외주면이 보강브라켓트(7)와 상호 용접결합됨으로써 설치되어지게 된다.In addition, the upper end of the pipe nut 9 passes through the reinforcing bracket 7 and its outer circumferential surface is installed by mutual welding with the reinforcing bracket 7.

이와 같이, 설치된 파이프너트(9)에는 도시된 바와 같이 볼트(3)가 체결되어지는 바, 이때 섀시리어크로스멤버(2)의 단부가 같이 체결되어 짐으로써 섀시리어크로스멤버(2)의 조립이 완료되어지게 된다.As such, the bolts 3 are fastened to the installed pipe nut 9 as shown in the drawing. At this time, the ends of the chassis rear cross members 2 are fastened together to assemble the chassis rear cross members 2. Will be completed.

그러나, 상기와 같은 종래의 구조는 보강브라켓트(7)에 의해 밀폐된 하부폐공간(8b)이 전착공정이 이루어지지 않는 관계로 인해 녹의 발생을 방지하는 방청기능이 떨어지게 되어 차량의 상품성을 감소시키는 문제점이 있게 된다.However, in the conventional structure as described above, the lower closed space 8b enclosed by the reinforcing bracket 7 is deteriorated in the anti-rusting function to prevent the occurrence of rust due to the lack of the electrodeposition process, thereby reducing the commercialization of the vehicle. There is a problem.

즉, 조립공정을 통해 각 부품의 조립이 완료되어진 차량은 도장공정을 경유 하게 된다.In other words, the vehicle has been assembled through the assembly process is completed through the painting process.

상기 도장공정에는 철판의 기름때 등을 제거하는 수세공정과, 전기도금의 방식과 같이 철판의 표면에 얇은 막의 도료를 부착시키는 전착공정이 포함된다.The coating process includes a washing process for removing oil stains and the like of the iron plate, and an electrodeposition process for attaching a thin film of paint to the surface of the iron plate, such as by electroplating.

그러나, 상기와 같은 종래의 구조는 하부폐공간(8b)이 보강브라켓트(7)에 의해 완전히 밀폐된 상태이기 때문에, 수세공정은 물론 전착공정도 제대로 이루어지지 않게 되고, 이에 따라 녹의 발생을 방지하는 방청기능이 크게 떨어지게 됨으로써 결국 부식으로 인해 차량의 상품성이 감소되게 되는 것이다.However, in the conventional structure as described above, since the lower closed space 8b is completely sealed by the reinforcing bracket 7, the washing process as well as the electrodeposition process are not properly performed, thereby preventing the occurrence of rust. As the rust preventive function is greatly degraded, the commercial value of the vehicle is reduced due to corrosion.

이에 본 발명은 상기와 같은 문제점을 해소하기 위해 안출된 것으로, 보강브라켓트의 구조를 변경하여 리어플로어사이드멤버와 리어플로어패널 사이에 밀폐공간이 발생되지 않도록 함으로써, 차량의 도장공정시 수세공정 및 전착공정이 원활하게 수행될 수 있도록 하고, 이에 따라 녹의 발생을 방지하는 방청기능을 대폭 증대시킬 수 있도록 하여 차량의 상품성 향상에 도움을 줄 수 있는 자동차용 섀시리어크로스멤버의 조립구조를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, by changing the structure of the reinforcement bracket so that the closed space between the rear floor member and the rear floor panel does not occur, the washing process and electrodeposition during the painting process of the vehicle The purpose of the present invention is to provide an assembly structure of the chassis rear cross member for automobiles, which can help the process to be performed smoothly, and thereby greatly increase the rust prevention function that prevents the occurrence of rust. There is this.

또한, 리어플로어사이드멤버 및 보강브라켓트에 용접결합되는 파이프너트 대신에 차체리어크로스멤버의 밑면으로 단순히 끼워서 사용하는 와셔형너트를 이용함으로써, 용접작업을 배제시킬 수 있도록 하여 제조공정의 단순화를 이룩할 수 있도록 하고, 더불어 작업의 편의성 및 생산성의 증대에도 도움을 줄 수 있도록 하는 자동차용 섀시리어크로스멤버의 조립구조를 제공함에 그 목적이 있다.In addition, instead of the pipe nut welded to the rear floor side member and the reinforcement bracket, the washer-type nut that is simply inserted into the underside of the car body cross member can be used to eliminate the welding work, thereby simplifying the manufacturing process. In addition, the object of the present invention is to provide an assembly structure of a chassis rear cross member for a vehicle that can help to increase work convenience and productivity.

상기와 같은 목적을 달성하기 위한 본 발명은, 차체리어크로스멤버와, 상기 차체리어크로스멤버의 양단이 밑면으로 중첩되어 용접결합되는 리어플로어사이드멤버와, 상기 차체리어크로스멤버 및 리어플로어사이드멤버의 윗면에 중첩되어 용접결합되는 리어플로어패널과, 상기 리어플로어사이드멤버의 내부공간에 위치되어 리어플로어사이드멤버에 용접결합되는 보강브라켓트를 구비한 자동차에 있어서, 상기 보강브라켓트는 평판모양으로 형성되면서 그 양단은 리어플로어사이드멤버의 안쪽 측면과 용접결합되고, 상기 차체리어크로스멤버와 리어플로어사이드멤버 및 보강브라켓트에는 차체의 상하방향으로 수직하게 관통되는 볼트구멍이 각각 형성되며, 상기 보강브라켓트상에는 용접너트가 볼트구멍과 연결되도록 결합되고, 상기 차체리어크로스멤버의 밑면에는 와셔형너트 및 섀시리어크로스멤버의 단부가 볼트구멍과 연결되도록 중첩되어, 상기 섀시리어크로스멤버를 관통하여 와셔형너트에 체결되고 계속해서 상기 볼트구멍을 관통하여 용접너트에 체결되는 볼트를 통해 상기 섀시리어크로스멤버의 조립이 이루어지는 것을 특징으로 한다.The present invention for achieving the above object, the car floor cross member, both the rear end of the car body cross member is overlapped to the bottom and welded to the rear floor member, the car body cross member and the rear floor side member In a vehicle having a rear floor panel overlapping and welded to an upper surface and a reinforcement bracket positioned in an inner space of the rear floor side member and welded to a rear floor side member, the reinforcement bracket is formed in a flat plate shape. Both ends are welded to the inner side of the rear floor side member, and the car body cross member, the rear floor side member and the reinforcing bracket are formed with bolt holes vertically penetrating in the vertical direction of the car body, respectively, on the reinforcing bracket and the weld nut. Is coupled so as to be connected to the bolt hole, An end of the washer-type nut and chassis rear cross member are overlapped on the bottom of the loss member so as to be connected to the bolt hole, and is fastened to the washer-type nut through the chassis rear cross member and then through the bolt hole to be fastened to the welding nut. The assembly of the chassis rear cross member is made through the bolt.

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 4와 도 5는 본 발명에 따른 섀시리어크로스멤버의 조립구조를 설명하기 위한 분리사시도 및 분리상태의 종단면도로서, 종래 구조와 동일한 부위에는 동일한 참조부호를 붙이면서 설명하기로 한다.4 and 5 are exploded perspective views and longitudinal cross-sectional views for explaining the assembly structure of the chassis rear cross member according to the present invention, and the same parts as in the conventional structure will be described with the same reference numerals.

본 발명은 승용차와 같은 차량에서 차체의 리어하부에 볼트(3)를 매개로 장착되어지는 섀시리어크로스멤버(2)의 조립구조에 관한 것이다.The present invention relates to an assembling structure of a chassis rear cross member (2) which is mounted via a bolt (3) on the lower lower part of a vehicle body in a vehicle such as a passenger car.

즉, 본 발명에 따른 섀시리어크로스멤버(2)의 조립구조는 도 4 내지 도 8에 도시된 바와 같다.That is, the assembly structure of the chassis rear cross member 2 according to the present invention is as shown in Figs.

도시된 바와 같이, 차체리어크로스멤버(4)는 그 양단이 리어플로어사이드멤버(5)의 측면 및 저면과 중첩되어 용접결합을 통해 설치됨으로써 차체의 골격을 구성하게 되고, 리어플로어패널(6)은 차체리어크로스멤버(4) 및 리어플로어사이드멤버(5)의 윗면에 중첩되어 용접결합됨으로써 실내의 리어부를 구성하게 된다.As shown, the vehicle rear cross member 4 has both ends overlapped with the side and bottom of the rear floor side member 5 to be installed through welding to form a skeleton of the vehicle body, and the rear floor panel 6 Is overlapped and welded to the upper surfaces of the vehicle body cross member 4 and the rear floor side member 5 to form a rear portion of the room.

그리고, 리어플로어패널(6)에 의해 상부가 덮혀진 상기 리어플로어사이드멤버(5)의 내부공간에는 본 발명에 따라 평판모양으로 형성된 보강브라켓트(11)가 위치하게되며, 또한 그 양단이 상기 리어플로어사이드멤버(5)의 안쪽 측면과 용접결합됨으로써 설치된다.In addition, in the inner space of the rear floor member 5 covered with the upper by the rear floor panel 6, a reinforcing bracket 11 formed in the shape of a flat plate is located in accordance with the present invention, and both ends of the rear It is installed by welding to the inner side of the floorside member (5).

한편, 상기 차체리어크로스멤버(4)와 리어플로어사이드멤버(5) 및 보강브라켓트(11)에는 차체의 상하방향으로 수직하게 관통되는 볼트구멍(4a,5a,11a)이 각각 형성된다.On the other hand, the vehicle body cross member 4, the rear floor side member 5 and the reinforcing bracket 11 are formed with bolt holes 4a, 5a, 11a vertically penetrating in the vertical direction of the vehicle body, respectively.

그리고, 상기 보강브라켓트(11)상에는 용접너트(13)가 볼트구멍(11a)과 연결되도록 결합되고, 상기 차체리어크로스멤버(4)의 밑면에는 와셔형너트(15) 및 섀시리어크로스멤버(2)의 단부가 볼트구멍(4a)과 연결되도록 중첩되어 진다.The welding nut 13 is coupled to the bolt hole 11a on the reinforcing bracket 11, and the washer-type nut 15 and the chassis rear cross member 2 are provided on the bottom surface of the vehicle body cross member 4. ) Ends so as to be connected to the bolt holes 4a.

따라서, 상기 섀시리어크로스멤버(2)는 이 섀시리어크로스멤버(2)를 관통하여 와셔형너트(15)에 체결되고 계속해서 상기 볼트구멍(4a,5a,11a)을 관통하여 용접너트(13)에 체결되는 볼트(3)를 통해 차체의 리어하부에 장착되도록 조립이 이루어지게 된다.Therefore, the chassis rear cross member 2 is fastened to the washer-type nut 15 through the chassis rear cross member 2, and then through the bolt holes 4a, 5a, 11a to weld nut 13 The assembly is made to be mounted to the rear lower portion of the vehicle body through the bolt (3) fastened to the).

여기서, 상기 와셔형너트(15)는 상기 섀시리어크로스멤버(2)에 형성된 조립 구멍(2a)으로 끼워지는 하부돌출부(15a)와, 상기 하부돌출부(15a)의 외주면에서 반경방향으로 확장되도록 형성되어 상하면이 각각 상기 차체리어크로스멤버(4)의 밑면 및 상기 섀시리어크로스멤버(2)의 윗면과 중첩을 이루는 플랜지부(15b)와, 상기 플랜지부(15b)를 중심으로 하부돌출부(15a)와 반대되는 상측으로 돌출 형성되면서 그 외주면이 화살촉 모양의 경사면으로 형성되는 상부돌출부(15c)로 구성된다.Here, the washer-type nut 15 is formed to extend in the radial direction from the lower protrusion 15a fitted into the assembly hole 2a formed in the chassis rear cross member 2 and the outer circumferential surface of the lower protrusion 15a. The upper and lower surfaces respectively have a flange portion 15b overlapping a bottom surface of the vehicle rear cross member 4 and an upper surface of the chassis rear cross member 2, and a lower protrusion 15a around the flange portion 15b. Protruding to the upper side opposite to the outer peripheral surface is composed of an upper projection (15c) formed in the shape of the arrowhead inclined surface.

그리고, 상기 차체리어크로스멤버(4)의 밑면과 이에 중첩되는 상기 리어플로어사이드멤버(5)의 바닥면에는 상기 와셔형너트(15)의 상부돌출부(15c)가 삽입 안착되도록 경사홈(4b,5b)이 형성되고, 상기 경사홈(4b,5b)의 중간부위는 평면부(4c,5c)로 형성되면서 이 평면부(4c,5c)에 볼트구멍(4a,5a)이 각각 형성되어 진다.In addition, the inclined grooves 4b and the bottom surface of the vehicle body cross member 4 and the bottom surface of the rear floor side member 5 overlapping the upper surface protruding portion 15c of the washer nut 15 are inserted and seated. 5b) is formed, and the intermediate portions of the inclined grooves 4b and 5b are formed with flat portions 4c and 5c, and bolt holes 4a and 5a are formed in the flat portions 4c and 5c, respectively.

또한, 상기 보강브라켓트(11)는 상기 리어플로어사이드멤버(5)의 평면부(5c)와 중첩을 이루도록 볼트구멍(11a)의 주변부에 형성되는 평면부(11b)와, 상기 평면부(11b)로부터 리어플로어사이드멤버(5)의 안쪽 측면을 향해 상방향 경사지게 형성되는 경사부(11c)와, 상기 경사부(11c)로부터 리어플로어사이드멤버(5)의 안쪽 측면과 중첩을 이루도록 굴곡 형성되면서 용접결합되는 수직부(11d)로 구성된다.In addition, the reinforcing bracket 11 is a flat portion (11b) formed in the periphery of the bolt hole (11a) to overlap with the flat portion (5c) of the rear floor side member 5, and the flat portion (11b) The inclined portion 11c which is formed to be inclined upward toward the inner side of the rear floor side member 5 from the inclined portion 11c and is bent to overlap with the inner side of the rear floor side member 5 while being welded. It is composed of a vertical portion (11d) to be coupled.

따라서, 전술한 바와 같은 본 발명의 조립구조는 리어플로어사이드멤버(5)의 내부공간이 보강브라켓트(11)에 의해 밀폐되지 않는 구조를 갖게 됨으로써, 전착공정이 원활하게 진행되고 이에 따라 녹의 발생을 방지하는 방청기능이 대폭 증대되는 잇점이 있게 된다.Therefore, the assembly structure of the present invention as described above has a structure in which the inner space of the rear floor side member 5 is not sealed by the reinforcing bracket 11, so that the electrodeposition process proceeds smoothly, thereby preventing rust. There is an advantage that the anti-rust function to prevent significantly increased.

즉, 상기와 같이 조립이 완료된 차량은 도장공정을 경유하게 되는 바, 상기 의 도장공정에는 철판의 기름때 등을 제거하는 수세공정과, 전기도금의 방식과 같이 철판의 표면에 얇은 막의 도료를 부착시키는 전착공정이 포함된다.That is, the vehicle is assembled as described above is via the coating process, the washing process of removing the grease of the iron plate in the coating process, and attaching a thin film of paint on the surface of the iron plate like the electroplating method Electrodeposition process is included.

이에 따라, 본 발명의 조립구조는 보강브라켓트(11)가 평판모양으로 형성될 뿐만 아니라 경사부(11c)에 의해 그 하부의 공간(C)이 밀폐되지 않는 구조를 갖게 됨으로써, 차량의 도장공정시 완전한 수세공정과 전착공정이 진행될 수 있게 되어 녹의 발생을 방지하는 방청기능을 대폭 증대시킬 수 있게 되는 것이다.Accordingly, in the assembly structure of the present invention, the reinforcing bracket 11 is not only formed in a flat plate shape but also has a structure in which the space C in the lower portion thereof is not sealed by the inclined portion 11c, and thus, during the painting process of the vehicle. The complete washing process and electrodeposition process can be carried out to greatly increase the rust prevention function to prevent the occurrence of rust.

이와 같이, 방청기능이 증대되면 차량의 국부적인 부식현상을 예방할 수 있게 되어 차량의 상품성이 향상에 큰 도움이 되게 된다.As such, when the rust preventive function is increased, local corrosion of the vehicle can be prevented, thereby greatly improving the merchandise of the vehicle.

또한, 본 발명은 리어플로어사이드멤버(5) 및 보강브라켓트(11)에 용접결합되는 종래의 파이프너트(9;도2와 도3에 도시됨) 대신에, 차체리어크로스멤버(4)의 하부로 단순히 끼워서 사용하는 와셔형너트(15)를 사용하게 됨으로써, 용접작업을 배제시킬 수 있게 되고, 이에 따라 제조공정의 단순화를 이룩할 수 있게 되며, 더불어 작업의 편의성 및 생산성의 증대에도 크게 도움이 되는 잇점도 기대할 수 있게 된다.In addition, the present invention, instead of the conventional pipe nut 9 (shown in FIGS. 2 and 3) welded to the rear floor side member 5 and the reinforcing bracket 11, the lower portion of the vehicle body cross member 4 By using the washer-type nut 15 to be simply inserted into the furnace, it is possible to eliminate the welding work, thereby simplifying the manufacturing process, and also greatly increase the convenience and productivity of the work. Benefits can also be expected.

또한, 본 발명의 구조는 차종에 따라 가장 적합한 와셔형너트(15)를 작업자가 선택하여 사용할 수 있게 되고, 또한 파손시에는 교체작업이 수월하게 진행됨으로써, 경제성이 우수하다는 잇점도 있게 된다.In addition, according to the structure of the present invention, the operator can select and use the most suitable washer-type nut 15 according to the vehicle model, and also has an advantage that the economic efficiency is excellent because the replacement work is easily carried out in case of damage.

즉, 종래의 구조는 파이프너트(9)가 용접결합을 통해 조립이 됨으로써 차종에 따른 변경이 거의 불가능 할 뿐만 아니라, 파손시에는 리어플로어사이드멤버(5) 및 보강브라켓트(11)도 함께 교체를 해주어야 하지만, 본 발명은 교체 및 수리가 용이한 와셔형너트(15)를 사용하게 됨으로써 경제성이 우수한 장점을 있게 된다.That is, in the conventional structure, since the pipe nut 9 is assembled by welding, the change according to the vehicle model is almost impossible, and in case of breakage, the rear floor side member 5 and the reinforcing bracket 11 are also replaced. Although it should be, the present invention has the advantage of excellent economic efficiency by using a washer-type nut 15 that is easy to replace and repair.

이상 설명한 바와 같이 본 발명에 의한 섀시리어크로스멤버의 조립구조는, 차량의 도장공정시 완전한 수세공정과 전착공정이 진행될 수 있게 되어 녹의 발생을 방지하는 방청기능이 대폭 증대되게 되고, 와셔형너트를 사용하게 됨으로써 제조공정의 단순화가 이룩됨은 물론 작업의 편의성 및 생산성의 증대에도 큰 도움이 있게 되며, 차종에 따라 가장 적합한 와셔형너트를 선택하여 사용할 수 있게 됨으로써 경제성이 우수한 효과가 있게 된다.As described above, the assembly structure of the chassis rear cross member according to the present invention enables the complete washing process and electrodeposition process to proceed during the painting process of the vehicle, thereby greatly increasing the rust preventing function to prevent the occurrence of rust. As a result, the manufacturing process can be simplified, and the convenience and productivity of the work can be greatly improved, and the most suitable washer-type nut can be selected and used according to the vehicle model, so that the economic efficiency is excellent.

Claims

A vehicle floor cross member 4, a rear floor member 5 in which both ends of the car body cross member 4 overlap and weld to each other, and the car barrier cross member 4 and the rear floor side member ( 5) an automobile having a rear floor panel 6 overlapping and welded to an upper surface of the upper surface and a reinforcing bracket positioned in an inner space of the rear floor side member 5 and welded to the rear floor side member 5; In

The reinforcing bracket 11 is formed in a flat plate shape, and both ends thereof are welded to the inner side of the rear floor side member 5, and the vehicle body cross member 4 and the rear floor side member 5 and the reinforcing bracket ( 11, bolt holes 4a, 5a, and 11a vertically penetrating in the vertical direction of the vehicle body are formed, respectively, and the welding nut 13 is coupled to the bolt hole 11a on the reinforcing bracket 11, The underside of the vehicle rear cross member 4 overlaps the end of the washer-type nut 15 and the chassis rear cross member 2 so as to be connected to the bolt hole 4a, and passes through the chassis rear cross member 2. The chassis rear cross member 2 is assembled through the bolt 3 fastened to the washer-type nut 15 and subsequently passed through the bolt holes 4a, 5a, and 11a to the weld nut 13. Assembly structure of chassis rear cross member for automobile.

2. The washer nut according to claim 1, wherein

A lower projection 15a fitted into the assembling hole 2a formed in the chassis rear cross member 2;

A flange portion 15b formed so as to extend radially from an outer circumferential surface of the lower protrusion 15a and having an upper and lower surfaces overlapping with a lower surface of the vehicle rear cross member 4 and an upper surface of the chassis rear cross member 2, respectively. ,

Chassis rear cross member for automobiles, characterized in that the outer circumferential surface is formed as an arrowhead-shaped inclined surface while being formed to protrude upwardly opposite the lower protrusion 15a around the flange portion 15b. Assembly structure.

The inclined surface of the vehicle body cross member 4 and the bottom surface of the rear floor side member 5 overlapping the upper surface protruding portion 15c of the washer nut 15 are inserted and seated. Grooves 4b and 5b are formed, and the intermediate portions of the inclined grooves 4b and 5b are formed into flat portions 4c and 5c, and bolt holes 4a and 5a are formed in the flat portions 4c and 5c, respectively. Assembly structure of the chassis rear cross member for a vehicle, characterized in that formed.

The method of claim 1, wherein the reinforcing bracket 11

A planar portion 11b formed at a periphery of the bolt hole 11a to overlap the planar portion 5c of the rear floor side member 5;

An inclined portion 11c formed to be inclined upward from the plane portion 11b toward an inner side surface of the rear floor side member 5;

Assembly structure of the chassis rear cross member for automobiles, characterized in that it is composed of a vertical portion (11d) is bent and formed to overlap the inner side of the rear floor side member (5) from the inclined portion (11c) .