JP2016185728A - Coupling structure between members of vehicle body frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To friction stir join a gusset and a cross member with sufficient coupling strength.SOLUTION: A notch-shaped joint recessed portion 31 is formed on a gusset side attaching plate portion 25 of a gusset 4, and a joint projecting portion 22 is formed on a cross member side attaching plate portion 17 of a cross member 3. In a combination state in which the gusset side attaching plate portion 25 and the cross member side attaching plate portion 17 are superimposed, the joint projecting portion 22 enters the joint recessed portion 31. In the combination state, an outside surface of the joint projecting portion 22 opposes to an inside surface of the joint recessed portion 31 to approach or contact with each other, and a projecting portion top surface 33 is disposed on the generally same surface as an upper surface 27 of the gusset side attaching plate portion 25. The inside surface of the joint recessed portion 31 and the outside surface of the joint projecting portion 22 are linearly joined by friction stir joining along a boundary 35 between the upper surface 27 and the projecting portion top surface 33 in the combination state.SELECTED DRAWING: Figure 1

Description

本発明は、車体フレームの部材間を摩擦攪拌接合によって結合する結合構造に関する。   The present invention relates to a coupling structure that couples members of a vehicle body frame by friction stir welding.

特許文献１には、車体フレームを形成する２つの被接合物を板厚方向に重ねて摩擦攪拌接合によってスポット接合する構造が記載されている。   Patent Document 1 describes a structure in which two objects forming a body frame are overlapped in the plate thickness direction and spot-bonded by friction stir welding.

特開２００８−４４４４６号公報JP 2008-44446 A

しかし、特許文献１のようなスポット接合では接合範囲が狭く、十分な結合強度が得られない可能性がある。   However, spot bonding as in Patent Document 1 has a narrow bonding range, and there is a possibility that sufficient bonding strength cannot be obtained.

そこで、本発明は、車体フレームを形成する第１部材と第２部材とを、十分な結合強度で摩擦攪拌接合することが可能な車体フレームの部材間の結合構造の提供を目的とする。   Therefore, an object of the present invention is to provide a coupling structure between members of a vehicle body frame capable of friction stir welding the first member and the second member forming the vehicle body frame with sufficient coupling strength.

上記目的を達成すべく本発明の第１の態様は、車体フレームを形成する第１部材と第２部材とを摩擦攪拌接合によって結合する結合構造であって、第１取付板部と、第２取付板部と、接合凹部と、接合凸部とを備える。   In order to achieve the above object, a first aspect of the present invention is a coupling structure in which a first member and a second member forming a body frame are coupled by friction stir welding, and includes a first mounting plate portion, A mounting plate part, a joining recessed part, and a joining convex part are provided.

第１取付板部は、第１表面及び第１裏面を表裏に有し、第１部材に一体形成される。第２取付板部は、第２表面及び第２裏面を表裏に有し、第２部材に一体形成される。接合凹部は、切欠き状又は溝状であり、第１取付板部に形成される。接合凸部は、第２取付板部の第２表面から部分的に突出し、第１裏面と第２表面とが対向する姿勢で第１取付板部と第２取付板部とを重ねた組合せ状態で接合凹部に侵入する。接合凸部は、上記組合せ状態で、接合凹部の内側面と対向して近接又は接触する外側面と、第１表面と略同一面に配置される凸部頂面とを有する。   The first mounting plate portion has a first surface and a first back surface on the front and back sides, and is integrally formed with the first member. The second mounting plate portion has a second surface and a second back surface on the front and back sides, and is integrally formed with the second member. The joint recess has a notch shape or a groove shape, and is formed in the first mounting plate portion. The joint convex portion partially protrudes from the second surface of the second mounting plate portion, and the first mounting plate portion and the second mounting plate portion are stacked in a posture in which the first back surface and the second surface face each other. It penetrates into the joint recess. The bonding convex portion has an outer surface that is close to or in contact with the inner side surface of the bonding concave portion and a convex top surface that is disposed on substantially the same surface as the first surface in the combined state.

接合凹部の内側面と接合凸部の外側面とは、上記組合せ状態での第１表面と凸部頂面との境界に沿った摩擦攪拌接合によって線状に接合される。   The inner surface of the joint recess and the outer surface of the joint projection are joined linearly by friction stir welding along the boundary between the first surface and the top surface of the projection in the combined state.

上記構成では、第１表面と凸部頂面との境界に沿った摩擦攪拌接合によって、接合凹部の内側面と接合凸部の外側面とを線状に接合したので、接合凹部（第１部材）と接合凸部（第２部材）とを広範囲に亘って接合することができ、十分な結合強度を確保することができる。   In the above configuration, the inner surface of the joint recess and the outer surface of the joint projection are joined linearly by friction stir welding along the boundary between the first surface and the top surface of the projection. ) And the bonding convex portion (second member) can be bonded over a wide range, and sufficient bonding strength can be ensured.

本発明の第２の態様は、第１の態様の結合構造であって、第２部材は、車幅方向に延びるクロスメンバであり、第１部材は、クロスメンバの左右にそれぞれ配置される。クロスメンバは、左右の端部に第２取付板部がそれぞれ一体形成されるクロスメンバ横板部を有する。クロスメンバ横板部の外面には、車幅方向に直線状に延びる線状凸部が一体形成される。線状凸部の左端部は、左の第１部材の接合凹部に侵入する左の接合凸部であり、線状凸部の右端部は、右の第１部材の接合凹部に侵入する右の接合凸部である。   A second aspect of the present invention is the coupling structure according to the first aspect, wherein the second member is a cross member extending in the vehicle width direction, and the first member is disposed on each of the left and right sides of the cross member. The cross member has a cross member horizontal plate portion in which the second mounting plate portions are integrally formed at the left and right ends. A linear protrusion extending linearly in the vehicle width direction is integrally formed on the outer surface of the cross member horizontal plate. The left end portion of the linear convex portion is the left joint convex portion that enters the joint concave portion of the left first member, and the right end portion of the linear convex portion is the right joint portion that enters the joint concave portion of the right first member. It is a joint convex part.

上記構成では、クロスメンバ横板部の外面から線状凸部が突出して車幅方向に直線状に延びるので、線状凸部によってクロスメンバの剛性を高めることができる。   In the above configuration, since the linear protrusion protrudes from the outer surface of the cross member horizontal plate and extends linearly in the vehicle width direction, the rigidity of the cross member can be increased by the linear protrusion.

本発明によれば、車体フレームを形成する第１部材と第２部材とを、十分な結合強度で摩擦攪拌接合することができる。   According to the present invention, the first member and the second member forming the vehicle body frame can be friction stir welded with sufficient bond strength.

本発明の一実施形態に係る結合構造の斜視図である。It is a perspective view of the joint structure concerning one embodiment of the present invention. 図１のII−II矢視断面図である。It is II-II arrow sectional drawing of FIG. 図２を矢印III方向から視た平面図である。It is the top view which looked at FIG. 2 from the arrow III direction. 第１の変形例の斜視図である。It is a perspective view of the 1st modification. 第２の変形例の斜視図である。It is a perspective view of the 2nd modification. 第３の変形例の斜視図である。It is a perspective view of the 3rd modification.

以下、本発明の実施形態について図面を参照して詳細に説明する。図中の矢印ＦＲは車両の前方を、ＵＰは上方を、ＩＮは車幅方向内側をそれぞれ示す。また、以下の説明において、前後方向は車両の前後方向を意味し、左右方向は車両の前方を向いた状態での左右方向を意味する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, the arrow FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In the following description, the front-rear direction means the front-rear direction of the vehicle, and the left-right direction means the left-right direction in a state where it faces the front of the vehicle.

本実施形態の車両は、車体フレーム１を有するトラック等であり、車体フレーム１は、図１に示すように、左右１対のサイドメンバ２と、クロスメンバ（第２部材）３と、左右１対のガセット（第１部材）４とを備える。   The vehicle of the present embodiment is a truck or the like having a body frame 1. The body frame 1 includes a pair of left and right side members 2, a cross member (second member) 3, and left and right 1 as shown in FIG. A pair of gussets (first members) 4 are provided.

左右のサイドメンバ２は、車幅方向の両側で互いに離間して前後方向に延びる。各サイドメンバ２は、車幅方向内側に開口するＵ状断面であり、略鉛直に起立して前後方向に延びる縦壁部１１と、縦壁部１１の上端縁及び下端縁からそれぞれ車幅方向内側に曲折して相対向する上壁部１２及び下壁部１３とを一体的に有する。   The left and right side members 2 are separated from each other on both sides in the vehicle width direction and extend in the front-rear direction. Each side member 2 has a U-shaped cross section that opens to the inner side in the vehicle width direction. The vertical wall portion 11 stands substantially vertically and extends in the front-rear direction, and the upper wall edge 11 and the upper edge and the lower edge of the vertical wall portion 11 respectively. The upper wall portion 12 and the lower wall portion 13 that are bent inward and face each other are integrally provided.

クロスメンバ３は、左右のサイドメンバ２の間で車幅方向に直線状に延びる。クロスメンバ３は、押出成型によって閉断面形状（本実施形態では車幅方向外側に開口する矩形筒形状）に形成されたアルミ材であり、前後１対の縦板部１４と上板部（クロスメンバ横板部）１５と下板部（クロスメンバ横板部）１６とを一体的に有する。上板部１５と下板部１６とは、上下に離間して相対向し、前後の縦板部１４は、前後に離間して相対向して起立する。前側の縦板部１４は、上板部１５の前端縁と下板部１６の前端縁とを連結し、後側の縦板部１４は、上板部１５の後端縁と下板部１６の後端縁とを連結する。   The cross member 3 extends linearly between the left and right side members 2 in the vehicle width direction. The cross member 3 is an aluminum material formed by extrusion molding into a closed cross-sectional shape (in this embodiment, a rectangular cylindrical shape opening outward in the vehicle width direction), and a pair of front and rear vertical plate portions 14 and an upper plate portion (cross A member horizontal plate portion 15 and a lower plate portion (cross member horizontal plate portion) 16 are integrally provided. The upper plate portion 15 and the lower plate portion 16 are spaced apart from each other and opposed to each other, and the front and rear vertical plate portions 14 are spaced apart from each other in the front and rear and stand to face each other. The front vertical plate portion 14 connects the front end edge of the upper plate portion 15 and the front end edge of the lower plate portion 16, and the rear vertical plate portion 14 is connected to the rear end edge of the upper plate portion 15 and the lower plate portion 16. Connect to the rear edge.

図１〜図３に示すように、クロスメンバ３の上板部１５の左右の端部と、下板部１６の左右の端部とは、上下のクロスメンバ側取付板部（第２取付板部）１７をそれぞれ構成する。上側のクロスメンバ側取付板部１７は、第２表面としての上面（上板部１５の上面の左右の端部）１８と、第２裏面としての下面（上板部１５の下面の左右の端部）１９とを表裏に有する（図２参照）。同様に、下側のクロスメンバ側取付板部１７は、第２表面としての下面（下板部１６の下面の左右の端部）２０と、第２裏面としての上面（下板部１６の上面の左右の端部）２１とを表裏に有する（図２参照）。   As shown in FIGS. 1 to 3, the left and right end portions of the upper plate portion 15 of the cross member 3 and the left and right end portions of the lower plate portion 16 include upper and lower cross member side mounting plate portions (second mounting plates). Part) 17 respectively. The upper cross member side mounting plate portion 17 includes an upper surface (second end on the upper surface of the upper plate portion 15) 18 as a second surface and a lower surface (second ends on the lower surface of the upper plate portion 15) as a second rear surface. Part) 19 (see FIG. 2). Similarly, the lower cross member side mounting plate portion 17 includes a lower surface (second left and right ends of the lower plate portion 16) 20 as a second surface and an upper surface (upper surface of the lower plate portion 16) as a second back surface. 2 on the front and back sides (see FIG. 2).

上板部１５の前後方向の略中央には、上板部１５の上面（外面）から上方に突出して車幅方向に直線状に延びる上側の線状凸部１０が一体形成される。上側の線状凸部１０の左端部と右端部とは、上側の左右のクロスメンバ側取付板部１７の上面１８から部分的に突出する上側の左右の接合凸部２２をそれぞれ構成する。   An upper linear convex portion 10 that protrudes upward from the upper surface (outer surface) of the upper plate portion 15 and extends linearly in the vehicle width direction is integrally formed at substantially the center in the front-rear direction of the upper plate portion 15. The left end portion and the right end portion of the upper linear convex portion 10 respectively constitute upper left and right joint convex portions 22 that partially protrude from the upper surface 18 of the upper left and right cross member side mounting plate portions 17.

同様に、下板部１６の前後方向の略中央には、下板部１６の下面（外面）から下方に突出して車幅方向に直線状に延びる下側の線状凸部１０が一体形成される。下側の線状凸部１０の左端部と右端部とは、下側の左右のクロスメンバ側取付板部１７の下面２０から部分的に突出する下側の左右の接合凸部２２をそれぞれ構成する。   Similarly, a lower linear convex portion 10 that protrudes downward from the lower surface (outer surface) of the lower plate portion 16 and extends linearly in the vehicle width direction is integrally formed at substantially the center in the front-rear direction of the lower plate portion 16. The The left end portion and the right end portion of the lower linear convex portion 10 respectively constitute the lower left and right joint convex portions 22 that partially protrude from the lower surface 20 of the lower left and right cross member side mounting plate portions 17. To do.

接合凸部２２の外縁は、前後の直線部分と車幅方向外側の半円状の湾曲部分とからなる。クロスメンバ３の押出成型時には、上下の線状凸部１０の凸形状も上板部１５及び下板部１６と同時に形成され、押出成型後の凸形状の左右の端部を湾曲状に切除することによって、接合凸部２２が形成される。   The outer edge of the joint convex part 22 is composed of front and rear straight portions and a semicircular curved portion on the outer side in the vehicle width direction. At the time of extrusion molding of the cross member 3, the convex shapes of the upper and lower linear convex portions 10 are formed simultaneously with the upper plate portion 15 and the lower plate portion 16, and the left and right end portions of the convex shape after the extrusion molding are cut out in a curved shape. Thereby, the joint convex part 22 is formed.

ガセット４は、クロスメンバ３の左右の端部と左右のサイドメンバ２とを結合するために、クロスメンバ３の左右の端部にそれぞれ配置され固定される。クロスメンバ３の左端部と右端部とには、それぞれ上下２つ（左右で計４つ）のガセット４が固定される。これら４つのガセット４は、全て同一形状のアルミ材であり、各ガセット４は、ガセット横板部２３とガセット縦板部２４とを一体的に有する。   The gusset 4 is disposed and fixed to the left and right end portions of the cross member 3 in order to connect the left and right end portions of the cross member 3 to the left and right side members 2. Two upper and lower gussets 4 (a total of four on the left and right sides) are fixed to the left end and the right end of the cross member 3, respectively. These four gussets 4 are all aluminum materials having the same shape, and each gusset 4 integrally includes a gusset horizontal plate portion 23 and a gusset vertical plate portion 24.

ガセット横板部２３は、全体が上下方向と略直交する平板状であり、車幅方向内側のガセット側取付板部（第１取付板部）２５と車幅方向外側の延長板部２６とを一体的に有する。ガセット側取付板部２５は、クロスメンバ３の上下のクロスメンバ側取付板部１７に、摩擦攪拌接合によって溶着されて固定される。ガセット横板部２３は、車幅方向外側に向かってクロスメンバ３の前方及び後方へ拡がる略台形状であり、延長板部２６は、ガセット側取付板部２５の車幅方向外端から車幅方向外側に延びる。   The gusset horizontal plate portion 23 has a flat plate shape that is substantially perpendicular to the vertical direction, and includes a gusset side mounting plate portion (first mounting plate portion) 25 on the inner side in the vehicle width direction and an extension plate portion 26 on the outer side in the vehicle width direction. Have one. The gusset side mounting plate portion 25 is welded and fixed to the upper and lower cross member side mounting plate portions 17 of the cross member 3 by friction stir welding. The gusset horizontal plate portion 23 has a substantially trapezoidal shape extending toward the front and rear of the cross member 3 toward the outer side in the vehicle width direction, and the extension plate portion 26 extends from the outer end in the vehicle width direction of the gusset side mounting plate portion 25 to the vehicle width. Extends outward in the direction.

上側のガセット４のガセット側取付板部２５は、第１表面としての上面２７と、第２裏面としての下面２８とを表裏に有する（図２参照）。同様に、下側のガセット４のガセット側取付板部２５は、第２表面としての下面２９と、第２裏面としての上面３０とを表裏に有する（図２参照）。   The gusset side mounting plate portion 25 of the upper gusset 4 has an upper surface 27 as a first surface and a lower surface 28 as a second back surface (see FIG. 2). Similarly, the gusset side mounting plate portion 25 of the lower gusset 4 has a lower surface 29 as a second surface and an upper surface 30 as a second back surface (see FIG. 2).

上下のガセット側取付板部２５には、車幅方向外側に凹む切欠き状の接合凹部３１が形成される。接合凹部３１の内縁は、接合凸部２２の外縁と同様に、前後の直線部分と車幅方向外側の半円状の湾曲部分とからなり、接合凸部２２の外縁よりも僅かに大きい寸法形状に設定される。   The upper and lower gusset side mounting plate portions 25 are formed with notched joint recesses 31 that are recessed outward in the vehicle width direction. Similar to the outer edge of the joint convex portion 22, the inner edge of the joint concave portion 31 is composed of front and rear straight portions and a semicircular curved portion on the outer side in the vehicle width direction, and is slightly larger than the outer edge of the joint convex portion 22. Set to

上側の左右の接合凸部２２は、上側のガセット４のガセット側取付板部２５の下面２８と上側のクロスメンバ側取付板部１７の上面１８とが対向する姿勢でガセット側取付板部２５をクロスメンバ側取付板部１７に上方から重ねた組合せ状態で、上側の左右の接合凹部３１にそれぞれ侵入する。   The upper left and right joint protrusions 22 are arranged so that the lower surface 28 of the upper gusset side mounting plate portion 25 of the upper gusset 4 and the upper surface 18 of the upper cross member side mounting plate portion 17 face each other. In the combined state of overlapping the cross member side mounting plate portion 17 from above, the upper left and right joining recesses 31 respectively enter.

同様に、下側の左右の接合凸部２２は、下側のガセット４のガセット側取付板部２５の上面３０と下側のクロスメンバ側取付板部１７の下面２０とが対向する姿勢でガセット側取付板部２５をクロスメンバ側取付板部１７に下方から重ねた組合せ状態で、下側の左右の接合凹部３１にそれぞれ侵入する。   Similarly, the lower left and right joint projections 22 are gusseted so that the upper surface 30 of the gusset side mounting plate portion 25 of the lower gusset 4 and the lower surface 20 of the lower cross member side mounting plate portion 17 face each other. In a combined state in which the side mounting plate portion 25 is overlapped with the cross member side mounting plate portion 17 from below, the side mounting plate portion 25 enters the lower left and right joint recesses 31 respectively.

上記組合せ状態で、接合凸部２２の外側面３２は、接合凹部３１の内側面３４と対向して近接又は接触する（図２参照）。また、上側の接合凸部２２の凸部頂面３３は、上側のガセット側取付板部２５の上面２７と略同一面に配置され、下側の接合凸部２２の凸部頂面３３は、下側のガセット側取付板部２５の下面２９と略同一面に配置される（図２参照）。   In the combined state, the outer side surface 32 of the joint convex portion 22 faces or contacts the inner side surface 34 of the joint concave portion 31 (see FIG. 2). Further, the convex top surface 33 of the upper joint convex portion 22 is arranged on the substantially same surface as the upper surface 27 of the upper gusset side mounting plate portion 25, and the convex top surface 33 of the lower joint convex portion 22 is The lower gusset side mounting plate portion 25 is disposed on substantially the same plane as the lower surface 29 (see FIG. 2).

そして、上記組合せ状態において、上側の接合凹部３１の内側面３４と接合凸部２２の外側面３２とは、上側のガセット側取付板部２５の上面２７と凸部頂面３３との境界３５に沿った摩擦攪拌接合によって線状に接合され、下側の接合凹部３１の内側面３４と接合凸部２２の外側面３２とは、下側のガセット側取付板部２５の下面２９と凸部頂面３３との境界３５に沿った摩擦攪拌接合によって線状に接合される。   In the above combination state, the inner side surface 34 of the upper joint concave portion 31 and the outer surface 32 of the joint convex portion 22 are on the boundary 35 between the upper surface 27 of the upper gusset side mounting plate portion 25 and the convex top surface 33. The inner surface 34 of the lower bonding recess 31 and the outer surface 32 of the bonding convex portion 22 are connected to the lower surface 29 of the lower gusset side mounting plate portion 25 and the top of the convex portion. They are joined linearly by friction stir welding along the boundary 35 with the surface 33.

摩擦攪拌接合では、接合ツール５０を押付けた際のガセット側取付板部２５及び接合凸部２２の変形を抑制するための中子５１をクロスメンバ３の内側に挿入した状態で、接合ツール５０を境界３５の一方の直線部分の車幅方向内側の端部に押付けた後、一方の直線部分から湾曲部分を経由して他方の直線部分の車幅方向内側の端部に達するように、接合ツール５０を押付けたまま境界３５に沿って移動させる（接合範囲を図３に×印で示す）。   In the friction stir welding, the joining tool 50 is inserted in a state in which the core 51 for suppressing deformation of the gusset side mounting plate portion 25 and the joining convex portion 22 when the joining tool 50 is pressed is inserted inside the cross member 3. After pressing against one of the straight portions of the boundary 35 on the inner side in the vehicle width direction, the joining tool is reached from one straight portion via the curved portion to the inner end of the other straight portion in the vehicle width direction. 50 is moved along the boundary 35 while being pressed (the joining range is indicated by x in FIG. 3).

ガセット縦板部２４は、先端縁の前後方向の中央部分が切り欠かれた矩形平板状であり、延長板部２６の車幅方向外端縁の略全域から下方又は上方へ（上側のガセット４のガセット縦板部２４は下方へ、下側のガセット４のガセット縦板部２４は上方へ）略直角に曲折して延びる。   The gusset vertical plate portion 24 has a rectangular flat plate shape in which the center portion in the front-rear direction of the front end edge is cut out, and extends downward or upward from substantially the entire region of the outer edge in the vehicle width direction of the extension plate portion 26 (upper gusset 4 The gusset vertical plate portion 24 of the gusset 4 is bent downward and the gusset vertical plate portion 24 of the lower gusset 4 is bent at a substantially right angle.

ガセット横板部２３（第１取付板部２５）がクロスメンバ３に固定されたガセット取付状態で、ガセット縦板部２４は、クロスメンバ３の左右の先端よりも車幅方向外側に突出し、ガセット縦板部２４は、サイドメンバ２の上壁部１２と下壁部１３との間に車幅方向内側から挿入されて、サイドメンバ２の縦壁部１１の車幅方向内側面に面接触した状態で縦壁部１１に結合される。   In the gusset mounting state in which the gusset horizontal plate portion 23 (first mounting plate portion 25) is fixed to the cross member 3, the gusset vertical plate portion 24 protrudes outward in the vehicle width direction from the left and right ends of the cross member 3, and the gusset The vertical plate portion 24 is inserted from the inner side in the vehicle width direction between the upper wall portion 12 and the lower wall portion 13 of the side member 2 and is in surface contact with the inner side surface in the vehicle width direction of the vertical wall portion 11 of the side member 2. It is combined with the vertical wall portion 11 in a state.

ガセット縦板部２４は、クロスメンバ３よりも前方に配置される前側のサイドメンバ固定部３６と、クロスメンバ３よりも後方に配置される後側のサイドメンバ固定部３７とを一体的に有する。前後のサイドメンバ固定部３６，３７には、それぞれ２箇所のボルト挿通孔３８が形成され、４箇所のボルト挿通孔３８は前後方向に直線状に並ぶ。サイドメンバ２の縦壁部１１には、各ボルト挿通孔３８と連通するボルト挿通孔３９が形成され、ガセット縦板部２４は、４組（前側の２組と後側の２組）のボルト挿通孔３８，３９にそれぞれボルト４０を挿通し、反対側からナット４１を螺合して締付けることによって、縦壁部１１に固定される（図３参照）。   The gusset vertical plate portion 24 integrally includes a front side member fixing portion 36 disposed in front of the cross member 3 and a rear side member fixing portion 37 disposed rearward of the cross member 3. . Two bolt insertion holes 38 are formed in the front and rear side member fixing portions 36 and 37, respectively, and the four bolt insertion holes 38 are linearly arranged in the front-rear direction. Bolt insertion holes 39 communicating with the respective bolt insertion holes 38 are formed in the vertical wall portion 11 of the side member 2, and the gusset vertical plate portion 24 includes four sets (two sets on the front side and two sets on the rear side). The bolts 40 are respectively inserted into the insertion holes 38 and 39, and the nuts 41 are screwed and tightened from the opposite side to be fixed to the vertical wall portion 11 (see FIG. 3).

前側のサイドメンバ固定部３６と後側のサイドメンバ固定部３７との間の中央領域には、ガセット縦板部２４の上下方向の板幅を減少させる切欠き部４３が形成される。ガセット縦板部２４の先端縁（下端縁又は上端縁）は、前後のサイドメンバ固定部３６，３７では前後方向に直線状に延び、中央領域では切欠き部４３によって上方又は下方へ凹み、中央領域４２の板幅は、前後のサイドメンバ固定部３６，３７の板幅よりも短い。ガセット縦板部２４のうち前後のサイドメンバ固定部３６，３７の間の中間領域は、捻り剛性に与える影響が前後のサイドメンバ固定部３６，３７よりも小さく、この中間領域の上下方向の板幅を切欠き部４３によって減少させるので、ガセット４の捻り剛性を確保しつつ、ガセット４を軽量化することができる。   In a central region between the front side member fixing portion 36 and the rear side member fixing portion 37, a notch portion 43 for reducing the vertical plate width of the gusset vertical plate portion 24 is formed. The front end edge (lower end edge or upper end edge) of the gusset vertical plate portion 24 extends linearly in the front-rear direction at the front and rear side member fixing portions 36, 37, and is recessed upward or downward by the notch portion 43 in the center region. The plate width of the region 42 is shorter than the plate width of the front and rear side member fixing portions 36 and 37. The intermediate region between the front and rear side member fixing portions 36 and 37 of the gusset vertical plate portion 24 has a smaller influence on the torsional rigidity than the front and rear side member fixing portions 36 and 37, and the vertical plate of this intermediate region is Since the width is reduced by the notch 43, the gusset 4 can be reduced in weight while ensuring the torsional rigidity of the gusset 4.

以上説明したように、本実施形態によれば、上側のガセット４については、ガセット側取付板部２５の上面２７と凸部頂面３３との境界３５に沿った摩擦攪拌接合によって、また下側のガセット４については、ガセット側取付板部２５の下面２９と凸部頂面３３との境界３５に沿った摩擦攪拌接合によって、接合凹部３１の内側面３４と接合凸部２２の外側面３２とを線状に接合したので、接合凹部３１（ガセット４）と接合凸部２２（クロスメンバ３）とを広範囲に亘って接合することができ、十分な結合強度を確保することができる。   As described above, according to the present embodiment, the upper gusset 4 is subjected to friction stir welding along the boundary 35 between the upper surface 27 of the gusset side mounting plate portion 25 and the top surface 33 of the convex portion, and the lower side. For the gusset 4, the inner side surface 34 of the joint concave portion 31 and the outer side surface 32 of the joint convex portion 22 are formed by friction stir welding along the boundary 35 between the lower surface 29 of the gusset side mounting plate portion 25 and the convex top surface 33. Since these are joined in a linear shape, the joining concave portion 31 (gusset 4) and the joining convex portion 22 (cross member 3) can be joined over a wide range, and sufficient bonding strength can be ensured.

また、クロスメンバ３の上板部１５及び下板部１６の上面及び下面の車幅方向の略全域から線状凸部１０が突出して車幅方向に直線状に延びるので、線状凸部１０によってクロスメンバ３の剛性を高めることができる。   Moreover, since the linear convex part 10 protrudes from the substantially whole area of the upper surface part and the lower surface part 16 of the cross member 3 in the vehicle width direction and extends linearly in the vehicle width direction, the linear convex part 10 Thus, the rigidity of the cross member 3 can be increased.

なお、上記実施形態では、クロスメンバ３に線状凸部１０（接合凸部２２）を形成し、ガセット４に溝状の接合凹部３１を形成したが、図４に示すように、クロスメンバ３に溝状の接合凹部４４を形成し、ガセット４に接合凸部４５を形成してもよい。   In the above embodiment, the linear convex portion 10 (joining convex portion 22) is formed on the cross member 3, and the groove-like joining concave portion 31 is formed on the gusset 4. However, as shown in FIG. Alternatively, the groove-shaped bonding recess 44 may be formed in the gusset 4, and the bonding protrusion 45 may be formed in the gusset 4.

また、図５に示すように、線状凸部１０（接合凸部２２）と接合凹部３１とを複数組（図５では２組）設けてもよい。   Moreover, as shown in FIG. 5, you may provide multiple sets (2 sets in FIG. 5) of the linear convex part 10 (joining convex part 22) and the joining recessed part 31. As shown in FIG.

また、上記実施形態では、クロスメンバ３の左右に上下のガセット４を同じ姿勢でそれぞれ固定したが、上下のガセット４の一方を反転（天地を逆転）してクロスメンバ３に固定してもよい。   In the above embodiment, the upper and lower gussets 4 are fixed to the left and right sides of the cross member 3 in the same posture. However, one of the upper and lower gussets 4 may be reversed (the top and bottom are reversed) and fixed to the cross member 3. .

また、図６に示すように、上下のガセット４を一体化した（例えば、図１の上下のガセット縦板部２４を１つのガセット縦板部４６として連続させた）ガセット５を、クロスメンバ３の左右に１つずつ固定してもよい。この場合、ガセット縦面部３１の中央部分に開口孔状の切欠き部４７を形成してもよい。   Further, as shown in FIG. 6, the gusset 5 in which the upper and lower gussets 4 are integrated (for example, the upper and lower gusset vertical plate portions 24 of FIG. 1 are made continuous as one gusset vertical plate portion 46) is connected to the cross member 3. One may be fixed on each of the left and right sides. In this case, an opening hole-shaped notch 47 may be formed in the central portion of the gusset vertical surface portion 31.

また、クロスメンバ３の形状は、特に限定されず、前方又は後方に開口するＵ状断面など他の形状であってもよい。   The shape of the cross member 3 is not particularly limited, and may be other shapes such as a U-shaped cross section that opens forward or rearward.

また、本発明の結合構造を、クロスメンバとガセットとの結合以外に用いてもよい。   Moreover, you may use the coupling | bonding structure of this invention besides the coupling | bonding of a cross member and a gusset.

以上、本発明者によってなされた発明を適用した実施形態について説明したが、この実施形態による本発明の開示の一部をなす論述及び図面により本発明は限定されることはない。すなわち、この実施形態に基づいて当業者等によりなされる他の実施形態、実施例及び運用技術等は全て本発明の範疇に含まれることは勿論であることを付け加えておく。   As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

本発明の結合構造は、トラックその他の車両の車体フレームに広く適用することができる。   The coupling structure of the present invention can be widely applied to a body frame of a truck or other vehicles.

１ 車体フレーム
２ サイドメンバ
３ クロスメンバ（第２部材）
４，５ ガセット（第１部材）
１０ 線状凸部
１１ 縦壁部
１２ 上壁部
１３ 下壁部
１４ 縦板部
１５ 上板部（クロスメンバ横板部）
１６ 下板部（クロスメンバ横板部）
１７ 上下のクロスメンバ側取付板部（第２取付板部）
１８ 上側のクロスメンバ側取付板部の上面（第２表面）
１９ 上側のクロスメンバ側取付板部の下面（第２裏面）
２０ 下側のクロスメンバ側取付板部の下面（第２表面）
２１ 下側のクロスメンバ側取付板部の上面（第２裏面）
２２，４５ 接合凸部
２３ ガセット横板部
２４，４６ ガセット縦板部
２５ ガセット側取付板部（第１取付板部）
２６ 延長板部
２７ 上側のガセット側取付板部の上面（第１表面）
２８ 上側のガセット側取付板部の下面（第１裏面）
２９ 下側のガセット側取付板部の下面（第１表面）
３０ 下側のガセット側取付板部の上面（第１裏面）
３１，４４ 接合凹部
３２ 接合凸部の外側面
３３ 凸部頂面
３４ 接合凹部の内側面
３５ 境界
５０ 接合ツール
５１ 中子 1 Body frame 2 Side member 3 Cross member (second member)
4,5 Gusset (first member)
DESCRIPTION OF SYMBOLS 10 Linear convex part 11 Vertical wall part 12 Upper wall part 13 Lower wall part 14 Vertical board part 15 Upper board part (cross member horizontal board part)
16 Lower plate (cross member horizontal plate)
17 Upper and lower cross member side mounting plate (second mounting plate)
18 Upper surface of the upper cross member side mounting plate (second surface)
19 Lower surface of the upper cross member side mounting plate (second rear surface)
20 Lower surface of the lower cross member side mounting plate (second surface)
21 Upper surface of the lower cross member side mounting plate (second rear surface)
22, 45 Joint convex portion 23 Gusset horizontal plate portion 24, 46 Gusset vertical plate portion 25 Gusset side mounting plate portion (first mounting plate portion)
26 Extension plate portion 27 Upper surface (first surface) of upper gusset side mounting plate portion
28 Lower surface (first back surface) of upper gusset side mounting plate
29 Lower surface (first surface) of lower gusset side mounting plate
30 Upper surface of the lower gusset side mounting plate (first back surface)
31, 44 Bonding recess 32 Outer surface of the bonding protrusion 33 Convex top surface 34 Inner surface of the bonding recess 35 Boundary 50 Bonding tool 51 Core

Claims (2)

車体フレームを形成する第１部材と第２部材とを摩擦攪拌接合によって結合する結合構造であって、
第１表面及び第１裏面を表裏に有し、前記第１部材に一体形成される第１取付板部と、
第２表面及び第２裏面を表裏に有し、前記第２部材に一体形成される第２取付板部と、
前記第１取付板部に形成される切欠き状又は溝状の接合凹部と
前記第２取付板部の前記第２表面から部分的に突出し、前記第１裏面と前記第２表面とが対向する姿勢で前記第１取付板部と前記第２取付板部とを重ねた組合せ状態で前記接合凹部に侵入する接合凸部と、を備え、
前記接合凸部は、前記組合せ状態で、前記接合凹部の内側面と対向して近接又は接触する外側面と、前記第１表面と略同一面に配置される凸部頂面とを有し、
前記組合せ状態の前記第１表面と前記凸部頂面との境界に沿った摩擦攪拌接合によって、前記接合凹部の前記内側面と前記接合凸部の前記外側面とを線状に接合した
ことを特徴とする車体フレームの部材間の結合構造。 A coupling structure that couples the first member and the second member forming the body frame by friction stir welding,
A first mounting plate portion having a first surface and a first back surface on the front and back, and formed integrally with the first member;
A second mounting plate portion having a second surface and a second back surface on the front and back sides, and formed integrally with the second member;
A notch-shaped or groove-shaped joint recess formed in the first mounting plate portion and partially protrudes from the second surface of the second mounting plate portion, and the first back surface and the second surface face each other. A joint convex portion that enters the joint concave portion in a combined state in which the first mounting plate portion and the second mounting plate portion are stacked in a posture;
The joint convex portion has, in the combined state, an outer surface that faces or contacts the inner side surface of the joint concave portion, and a convex top surface that is disposed substantially flush with the first surface,
The inner side surface of the joint recess and the outer side surface of the joint convex portion are linearly joined by friction stir welding along the boundary between the first surface in the combined state and the top surface of the convex portion. A connecting structure between members of a vehicle body frame, which is a feature. 請求項１に記載の結合構造であって、
前記第２部材は、車幅方向に延びるクロスメンバであり、
前記第１部材は、前記クロスメンバの左右にそれぞれ配置され、
前記クロスメンバは、左右の端部に前記第２取付板部がそれぞれ一体形成されるクロスメンバ横板部を有し、
前記クロスメンバ横板部の外面には、車幅方向に直線状に延びる線状凸部が一体形成され、
前記線状凸部の左端部は、前記左の第１部材の前記接合凹部に侵入する左の前記接合凸部であり、
前記線状凸部の右端部は、前記右の第１部材の前記接合凹部に侵入する右の前記接合凸部である
ことを特徴とする車体フレームの部材間の結合構造。 The coupling structure according to claim 1,
The second member is a cross member extending in the vehicle width direction,
The first members are respectively arranged on the left and right of the cross member;
The cross member has a cross member lateral plate portion in which the second mounting plate portions are integrally formed at left and right ends, respectively.
On the outer surface of the cross member horizontal plate portion, a linear protrusion extending linearly in the vehicle width direction is integrally formed,
The left end portion of the linear convex portion is the left joint convex portion that enters the joint concave portion of the left first member,
The right end portion of the linear convex portion is the right joint convex portion that enters the joint concave portion of the right first member.

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