JP2019031234A - Cross member attachment structure - Google Patents

Cross member attachment structure Download PDF

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Publication number
JP2019031234A
JP2019031234A JP2017154349A JP2017154349A JP2019031234A JP 2019031234 A JP2019031234 A JP 2019031234A JP 2017154349 A JP2017154349 A JP 2017154349A JP 2017154349 A JP2017154349 A JP 2017154349A JP 2019031234 A JP2019031234 A JP 2019031234A
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Japan
Prior art keywords
cross member
female screw
width direction
vehicle width
suspension cross
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Pending
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JP2017154349A
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Japanese (ja)
Inventor
坂本　徹
Toru Sakamoto
徹 坂本
輝雄 榎戸
Teruo Enokido
輝雄 榎戸
秀喜 土佐
Hideki Tosa
秀喜 土佐
謙志 荒木
Kenji Araki
謙志 荒木
謙太 中西
Kenta Nakanishi
謙太 中西
健 六車
Ken Rokusha
健 六車
英史 猪爪
Hidefumi Inotsume
英史 猪爪
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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Publication date
Application filed by Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP2017154349A priority Critical patent/JP2019031234A/en
Priority to CN201810899735.0A priority patent/CN109383621A/en
Publication of JP2019031234A publication Critical patent/JP2019031234A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
    • 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

Abstract

To prevent falling of a cross member during a collision.SOLUTION: When an impact load input to a suspension cross member 14 is large during a frontal collision, cracks occur in portions of an upper member plate 14B and a lower plate member 14A in peripheries of bolt insertion holes 1410, 1412 of an end part of the suspension cross member 14 to cause fracture. When such action causes an inner diameter of the bolt insertion hole 1410 of the lower member plate 14A to become larger than an outer diameter of a head part 2806 of a bolt 28 and causes an inner diameter of the bolt insertion hole 1412 of the upper member plate 14B to become larger than an outer diameter of an upper part of a cylindrical body 30, the suspension cross member 14 starts falling downward by its self-weight. However, an edge part of a hole 4002 of a reinforcement plate 40 engages with a large diameter part 3002 of the cylindrical body 30 to prevent falling of the suspension cross member 14.SELECTED DRAWING: Figure 9

Description

本発明は、車幅方向に延在するクロスメンバの取り付け構造に関する。   The present invention relates to a cross member mounting structure extending in a vehicle width direction.

車幅方向に延在するクロスメンバとして、例えば、車両のサスペンションクロスメンバが知られている。サスペンションクロスメンバは、懸架装置（サスペンション機構）を保持する部材であり、サスペンションクロスメンバの車幅方向両側の端部が車幅方向両側のサイドメンバやサブフレームにボルトを用いて連結されている。
特許文献１には、車両の前面衝突時に、サスペンションクロスメンバをサブフレームから脱落させるクロスメンバの取り付け構造が開示されている。 As a cross member extending in the vehicle width direction, for example, a suspension cross member of a vehicle is known. The suspension cross member is a member that holds a suspension device (suspension mechanism), and ends of the suspension cross member on both sides in the vehicle width direction are connected to side members and subframes on both sides in the vehicle width direction using bolts.
Patent Document 1 discloses a cross member mounting structure in which a suspension cross member is dropped from a subframe at the time of a frontal collision of a vehicle.

特開２０１４−１６９０４３号公報JP 2014-169043 A

しかしながら、サスペンションクロスメンバの後方に車両構成部材が隣接して配置されている車両では、脱落したサスペンションクロスメンバが車両構成部材に衝突し、車両構成部材が損傷することが考えられる。
本発明は、上記事情に鑑みなされたものであり、衝突時のクロスメンバの脱落を防止する上で有利なクロスメンバの取り付け構造を提供することを目的とする。 However, in a vehicle in which a vehicle component is disposed adjacent to the rear of the suspension cross member, it is conceivable that the dropped suspension cross member collides with the vehicle component and the vehicle component is damaged.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cross member mounting structure that is advantageous in preventing the cross member from falling off during a collision.

上記目的を達成するために、請求項１記載の発明は、車幅方向に延在する中空状のクロスメンバの車幅方向の端部を車両の前後方向に延在するサイドメンバにボルトにより取り付ける取り付け構造であって、前記サイドメンバに設けられ前記ボルトが螺合される雌ねじ部材と、前記クロスメンバの車幅方向の端部の内部に設けられ、前記ボルトを挿通させることで前記ボルトと前記雌ねじ部材とで挟持される筒体とを備え、前記筒体に、前記筒体の他の箇所に比べて外径が大きい大径部が設けられていることを特徴とする。
請求項２記載の発明は、前記クロスメンバの車幅方向の端部は、サイドメンバの下方に取着され、前記筒体と前記雌ねじ部材は上下方向に延在しており、前記クロスメンバの車幅方向の端部の内部に、前記大径部よりも上方の前記筒体の部分が挿通され、外周部が前記クロスメンバに取着された補強板が設けられていることを特徴とする。
請求項３記載の発明は、前記サイドメンバに、前記雌ねじ部材の車両前後方向の少なくとも一方に前記雌ねじ部材の車両前後方向の倒れを阻止する倒れ阻止部材が設けられていることを特徴とする。
請求項４記載の発明は、前記倒れ阻止部材は、前記雌ねじ部材の車幅方向両側に位置する突出部が備えられていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, the end of the hollow cross member extending in the vehicle width direction is attached to the side member extending in the front-rear direction of the vehicle with a bolt. An attachment structure, provided in the side member and provided with an internal thread member into which the bolt is screwed, and an end portion in the vehicle width direction of the cross member, and by inserting the bolt, the bolt and the And a cylindrical body sandwiched between the female screw members, and the cylindrical body is provided with a large-diameter portion having a larger outer diameter than other portions of the cylindrical body.
According to a second aspect of the present invention, an end of the cross member in the vehicle width direction is attached below the side member, and the cylindrical body and the female screw member extend in the vertical direction. A reinforcing plate having an outer peripheral portion attached to the cross member is provided inside the end portion in the vehicle width direction, the portion of the cylindrical body above the large diameter portion being inserted therethrough. .
The invention according to claim 3 is characterized in that the side member is provided with a fall prevention member for preventing the fall of the female screw member in the vehicle longitudinal direction on at least one of the female screw member in the vehicle longitudinal direction.
The invention according to claim 4 is characterized in that the fall prevention member is provided with protrusions located on both sides of the female screw member in the vehicle width direction.

請求項１記載の発明によれば、前面衝突時、クロスメンバに入力する衝撃荷重によってクロスメンバの端部のボルトの周囲の部分が破断してクロスメンバが自重により下方に脱落しようとした場合、クロスメンバの端部のボルトの周囲の部分が筒体の大径部に係止されるので、クロスメンバの脱落を防止する上で有利となる。
したがって、脱落したクロスメンバがクロスメンバの後方に隣接して配置された車両構成部材に衝突して車両構成部材が損傷することを防止する上で有利となる。
請求項２記載の発明によれば、補強板の部分が筒体の大径部に係止するので、クロスメンバの脱落を防止する上でより有利となる。
請求項３記載の発明によれば、雌ねじ部材が脱落することを抑制する上で有利となり、クロスメンバの脱落を防止する上でより有利となる。
請求項４記載の発明によれば、雌ねじ部材が脱落することを抑制する上でより有利となり、クロスメンバの脱落を防止する上でより一層有利となる。 According to the first aspect of the present invention, when the front member collides, the portion around the bolt at the end of the cross member breaks due to the impact load input to the cross member, and the cross member tries to drop downward due to its own weight. Since the portion around the bolt at the end of the cross member is locked to the large diameter portion of the cylindrical body, it is advantageous in preventing the cross member from falling off.
Therefore, it is advantageous in preventing the dropped cross member from colliding with the vehicle component disposed adjacent to the rear of the cross member and damaging the vehicle component.
According to invention of Claim 2, since the part of a reinforcement board latches to the large diameter part of a cylinder, it becomes more advantageous when preventing the drop-off | omission of a cross member.
According to the third aspect of the present invention, it is advantageous for suppressing the female screw member from dropping off, and more advantageous for preventing the cross member from falling off.
According to the fourth aspect of the present invention, it is more advantageous in suppressing the female screw member from falling off, and further advantageous in preventing the cross member from falling off.

実施の形態に係る車両のクロスメンバの取り付け構造が適用されたサスペンションクロスメンバの側面図である。1 is a side view of a suspension cross member to which a vehicle cross member mounting structure according to an embodiment is applied. 実施の形態に係る車両のクロスメンバの取り付け構造が適用されたサスペンションクロスメンバの平面図である。1 is a plan view of a suspension cross member to which a vehicle cross member mounting structure according to an embodiment is applied. サスペンションクロスメンバの要部を示す斜視図である。It is a perspective view which shows the principal part of a suspension cross member. サスペンションクロスメンバの要部を透視して示す斜視図である。FIG. 3 is a perspective view illustrating a main part of a suspension cross member as seen through. サイドメンバを車両前後方向と平行する鉛直面で破断した断面図である。It is sectional drawing which fractured | ruptured the side member in the vertical surface parallel to a vehicle front-back direction. 前倒れ阻止部材の斜視図である。It is a perspective view of a forward collapse prevention member. （Ａ）は前倒れ阻止部材が雌ねじ部材に溶接された状態を示す側面図、（Ｂ）は（Ａ）の平面図であり溶接前の状態を示す。(A) is a side view showing a state in which the forward fall prevention member is welded to the female screw member, and (B) is a plan view of (A) and shows a state before welding. 後倒れ阻止部材が雌ねじ部材に溶接された状態を示す斜視図である。It is a perspective view which shows the state by which the back fall prevention member was welded to the internal thread member. サスペンションクロスメンバの端部がサイドフレームに連結された部分の断面図である。It is sectional drawing of the part by which the edge part of the suspension cross member was connected with the side frame.

以下、本発明の実施の形態について図面を参照して説明する。
なお、以下の図面において、符号ＦＲは車両前方、符号ＵＰは車両上方、符号ＨＬは車幅方向を示す。
図１、図２に示すように、車両１０は、車幅方向に間隔をおいて車両１０の前後方向に延在する一対のサイドメンバ１２と、車両１０の前後方向に間隔をおいて車幅方向に延在し一対のサイドメンバ１２を連結する不図示の複数のクロスメンバとを備えている。
それら複数のクロスメンバは、サスペンションクロスメンバ１４を含み、本実施の形態では、サスペンションクロスメンバ１４が中空状のクロスメンバに相当し、このサスペンションクロスメンバ１４をサイドメンバ１２に取り付ける構造に本発明が適用されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following drawings, symbol FR indicates the front side of the vehicle, symbol UP indicates the vehicle upper side, and symbol HL indicates the vehicle width direction.
As shown in FIG. 1 and FIG. 2, the vehicle 10 has a pair of side members 12 extending in the front-rear direction of the vehicle 10 with an interval in the vehicle width direction and a vehicle width with an interval in the front-rear direction of the vehicle 10. And a plurality of cross members (not shown) that extend in the direction and connect the pair of side members 12.
The plurality of cross members include a suspension cross member 14. In the present embodiment, the suspension cross member 14 corresponds to a hollow cross member, and the present invention has a structure in which the suspension cross member 14 is attached to the side member 12. Has been applied.

サイドメンバ１２は、水平方向に延在する前部１２Ａと、前部１２Ａの後端から車両後方に至るにつれて下方に変位する傾斜部１２Ｂと、傾斜部１２Ｂの後端から水平方向で後方に延在する中間部１２Ｃとを含んでいる。
サイドメンバ１２は、傾斜部１２Ｂ、中間部１２Ｃでは上方が開放された断面ハット形状を呈し、傾斜部１２Ｂでは開放された部分に不図示のダッシュパネルが取着され、中間部１２Ｃでは開放された部分に不図示のフロアパネルが取着されている。 The side member 12 includes a front portion 12A extending in the horizontal direction, an inclined portion 12B that is displaced downward from the rear end of the front portion 12A toward the rear of the vehicle, and a rear portion extending in the horizontal direction from the rear end of the inclined portion 12B. The intermediate part 12C which exists is included.
The side member 12 has a hat shape in which the upper part is opened in the inclined part 12B and the intermediate part 12C, a dash panel (not shown) is attached to the opened part in the inclined part 12B, and is opened in the intermediate part 12C. A floor panel (not shown) is attached to the part.

サスペンションクロスメンバ１４は、上下に間隔をおいたロアメンバプレート１４Ａとアッパメンバプレート１４Ｂの縁部が合わされることで構成され、左右の前輪１６の間で車幅方向に延在している。
サスペンションクロスメンバ１４の前部の車幅方向両側部は、サブフレーム１８を介してサイドメンバ１２の前方箇所に取着されている。
サスペンションクロスメンバ１４の前部の車幅方向両側部からそれぞれアーム２０が上方に突設され、それらアーム２０はサイドメンバ１２に取着されている。
サスペンションクロスメンバ１４の後部の車幅方向両側部はサイドメンバ１２の傾斜部１２Ｂに取着されている。 The suspension cross member 14 is configured by combining the edge portions of the lower member plate 14A and the upper member plate 14B spaced apart vertically, and extends in the vehicle width direction between the left and right front wheels 16.
Both sides in the vehicle width direction of the front portion of the suspension cross member 14 are attached to the front portion of the side member 12 via the subframe 18.
Arms 20 project upward from both sides in the vehicle width direction of the front portion of the suspension cross member 14, and the arms 20 are attached to the side members 12.
Both side portions in the vehicle width direction of the rear portion of the suspension cross member 14 are attached to the inclined portions 12B of the side members 12.

サスペンションクロスメンバ１４の車幅方向両側部に一対のロアアーム２２が揺動可能に結合されている。
すなわち、一対のロアアーム２２は、車幅方向に延在し、車幅方向の外側の端部でナックル２４を介して前輪１６を支持している。
ロアアーム２２の車幅方向の内側の端部に、前後に間隔をおいて不図示の前取り付け部と図３に示す後取り付け部２２０２とが設けられている。
図３に示すように、それら前取り付け部と後取り付け部２２０２とは、サスペンションクロスメンバ１４の開口１４０２からロアメンバプレート１４Ａとアッパメンバプレート１４Ｂとの間に挿入され、それぞれ不図示の前側ブッシュおよび後側ブッシュ２６を介してサスペンションクロスメンバ１４に揺動可能に結合されている。 A pair of lower arms 22 are swingably coupled to both sides of the suspension cross member 14 in the vehicle width direction.
That is, the pair of lower arms 22 extends in the vehicle width direction, and supports the front wheel 16 via the knuckle 24 at the outer end in the vehicle width direction.
A front mounting portion (not shown) and a rear mounting portion 2202 shown in FIG. 3 are provided at the inner end of the lower arm 22 in the vehicle width direction with a space in the front-rear direction.
As shown in FIG. 3, the front attachment portion and the rear attachment portion 2202 are inserted between the lower member plate 14A and the upper member plate 14B from the opening 1402 of the suspension cross member 14, and each of the front bush and the unillustrated front bush and The suspension cross member 14 is swingably coupled via a rear bush 26.

次に、サスペンションクロスメンバ１４のサイドメンバ１２への取り付け構造について説明する。
図４に示すように、サスペンションクロスメンバ１４の後部の車幅方向両側部は、ボルト２８、筒体３０、雌ねじ部材３２を介してサイドメンバ１２の傾斜部１２Ｂに取着されている。
サイドメンバ１２の傾斜部１２Ｂには、図５に示すように、下方に膨出する膨出部３４が設けられている。
膨出部３４は、車両前方に向いた前壁部３４０２と、前壁部３４０２の下端に連続し、後方に延在する下方を向いた底壁部３４０４と、それら前壁部３４０２と底壁部３４０４とで囲まれた空間を仕切る仕切壁部３４０６とを含んで構成されている。 Next, a structure for attaching the suspension cross member 14 to the side member 12 will be described.
As shown in FIG. 4, both sides in the vehicle width direction of the rear portion of the suspension cross member 14 are attached to the inclined portion 12 </ b> B of the side member 12 via bolts 28, a cylindrical body 30, and a female screw member 32.
As shown in FIG. 5, the inclined portion 12 </ b> B of the side member 12 is provided with a bulging portion 34 that bulges downward.
The bulging portion 34 includes a front wall portion 3402 that faces the front of the vehicle, a bottom wall portion 3404 that continues to the lower end of the front wall portion 3402 and extends rearward, and faces the front wall portion 3402 and the bottom wall. A partition wall portion 3406 that partitions the space surrounded by the portion 3404 is included.

底壁部３４０４には、ボルト２８のボルト挿通孔３４１０が形成されると共に、ボルト挿通孔３４１０と同軸上に、ボルト２８の雄ねじ２８０２（図９）が螺合される雌ねじ３２０６を有する雌ねじ部材３２が設けられている。
雌ねじ部材３２の下端の鍔部３２０４は、底壁部３４０４に溶着されている。
また、雌ねじ部材３２の上部は、仕切壁部３４０６の孔に挿通され、孔の内周部との間で溶接され、符号Ｂ１は雌ねじ部材３２の上部と孔の内周部とを接合したビードを示している。 A bolt insertion hole 3410 for the bolt 28 is formed in the bottom wall portion 3404, and a female screw member 32 having a female screw 3206 on which the male screw 2802 (FIG. 9) of the bolt 28 is screwed coaxially with the bolt insertion hole 3410. Is provided.
A flange portion 3204 at the lower end of the female screw member 32 is welded to the bottom wall portion 3404.
The upper portion of the female screw member 32 is inserted into the hole of the partition wall portion 3406 and welded between the inner peripheral portion of the hole. Reference numeral B1 denotes a bead that joins the upper portion of the female screw member 32 and the inner peripheral portion of the hole. Is shown.

さらに、傾斜部１２Ｂの内部には、雌ねじ部材３２の車両前後方向の倒れを阻止する倒れ阻止部材が設けられている。
倒れ阻止部材は、前倒れ阻止部材３６と後倒れ阻止部材３８とを含んで構成されている。 Furthermore, a tilt prevention member that prevents the female screw member 32 from tilting in the vehicle front-rear direction is provided inside the inclined portion 12B.
The fall prevention member includes a forward fall prevention member 36 and a rear fall prevention member 38.

図４、図５、図６、図７（Ａ）、（Ｂ）に示すように、前倒れ阻止部材３６は、雌ねじ部材３２の前方に配置されている。
前倒れ阻止部材３６は、車両前後方向に延在する本体板部３６０２と、本体板部３６０２の車幅方向両側から下方に屈曲された一対の側板部３６０４と、それら側板部３６０４の下部から車両後方に突設され雌ねじ部材３２の車幅方向両側に位置する一対の突出板部３６０６とを備えている。
一対の突出板部３６０６は、雌ねじ部材３２の外周面に合わされる円筒状に形成されている。
本実施の形態では、一対の突出板部３６０６が、雌ねじ部材３２の車幅方向両側に位置し雌ねじ部材３２の車幅方向の倒れを阻止する突出部を構成している。
本体板部３６０２の前部は、傾斜部１２Ｂの内部で膨出部３４の前壁部３４０２に溶接され、図５、図６、図７（Ａ）において符号Ｂ２は本体板部３６０２の前部と前壁部３４０２とを接合したビードを示している。
また、本体板部３６０２の後部は、雌ねじ部材３２の車両１０の前方に位置する外周面の部分に溶接され、図５、図６、図７（Ａ）において符号Ｂ３は本体板部３６０２の後部と雌ねじ部材３２の外周面の部分とを接合したビードを示している。
また、一対の突出板部３６０６の後部は、雌ねじ部材３２の車幅方向両側に位置する外周面の部分に溶接され、図６、図７（Ａ）において符号Ｂ４は突出板部３６０６の後部と雌ねじ部材３２の車幅方向両側に位置する外周面の部分とを接合したビードを示している。 As shown in FIGS. 4, 5, 6, and 7 (A) and 7 (B), the forward tilt prevention member 36 is disposed in front of the female screw member 32.
The forward collapse prevention member 36 includes a main body plate portion 3602 extending in the vehicle front-rear direction, a pair of side plate portions 3604 bent downward from both sides in the vehicle width direction of the main body plate portion 3602, and a lower portion of the side plate portions 3604. A pair of projecting plate portions 3606 that protrude rearward and are located on both sides of the female screw member 32 in the vehicle width direction are provided.
The pair of protruding plate portions 3606 are formed in a cylindrical shape that is fitted to the outer peripheral surface of the female screw member 32.
In the present embodiment, the pair of protruding plate portions 3606 constitutes protruding portions that are located on both sides of the female screw member 32 in the vehicle width direction and prevent the female screw member 32 from falling in the vehicle width direction.
The front portion of the main body plate portion 3602 is welded to the front wall portion 3402 of the bulging portion 34 inside the inclined portion 12B, and in FIG. 5, FIG. 6, and FIG. The bead which joined and the front wall part 3402 is shown.
The rear portion of the main body plate portion 3602 is welded to the outer peripheral surface portion of the female screw member 32 positioned in front of the vehicle 10, and reference numeral B3 in FIGS. 5, 6, and 7A denotes the rear portion of the main body plate portion 3602. The bead which joined and the part of the outer peripheral surface of the internal thread member 32 is shown.
The rear portions of the pair of protruding plate portions 3606 are welded to the outer peripheral surface portions located on both sides in the vehicle width direction of the female screw member 32. In FIGS. 6 and 7A, reference numeral B4 denotes the rear portion of the protruding plate portion 3606. The bead which joined the part of the outer peripheral surface located in the vehicle width direction both sides of the internal thread member 32 is shown.

図４、図５、図８に示すように、後倒れ阻止部材３８は、雌ねじ部材３２の後方に配置されている。
後倒れ阻止部材３８は、仕切壁部３４０６から上方に起立する起立板部３８０２と、起立板部３８０２の上端から車両前方に突出する上板部３８０４とを備えている。
上板部３８０４には、雌ねじ部材３２の外周面に合わされる前方に開放された半円弧状の欠部３８０６が形成され、欠部３８０６の車幅方向両側の上板部３８０４の部分が、雌ねじ部材３２の車幅方向両側に位置し雌ねじ部材３２の車幅方向の倒れを阻止する突出部３８０４Ａを構成している。
起立板部３８０２の下部は、傾斜部１２Ｂの内部で仕切壁部３４０６に溶接され、図５、図８において符号Ｂ５は起立板部３８０２の下部と仕切壁部３４０６とを接合したビードを示している。
また、欠部３８０６は、雌ねじ部材３２の車両１０の後方に位置する外周面の部分に溶接され、図５、図８において符号Ｂ６は欠部３８０６と雌ねじ部材３２の外周面の部分とを接合したビードを示している。 As shown in FIGS. 4, 5, and 8, the rearward fall prevention member 38 is disposed behind the female screw member 32.
The rearward fall prevention member 38 includes an upright plate portion 3802 that rises upward from the partition wall portion 3406 and an upper plate portion 3804 that protrudes forward from the upper end of the upright plate portion 3802.
The upper plate portion 3804 is formed with a semicircular arc-shaped cutout portion 3806 that is fitted to the outer peripheral surface of the female screw member 32, and the portions of the upper plate portion 3804 on both sides in the vehicle width direction of the cutout portion 3806 are formed with the female screw. Protruding portions 3804A that are located on both sides of the member 32 in the vehicle width direction and prevent the female screw member 32 from falling in the vehicle width direction are configured.
The lower portion of the upright plate portion 3802 is welded to the partition wall portion 3406 inside the inclined portion 12B. In FIGS. 5 and 8, reference numeral B5 denotes a bead that joins the lower portion of the upright plate portion 3802 and the partition wall portion 3406. Yes.
Further, the notch 3806 is welded to the outer peripheral surface portion of the female screw member 32 located behind the vehicle 10, and reference numeral B6 in FIG. 5 and FIG. 8 joins the notch 3806 and the outer peripheral surface portion of the female screw member 32. Shows the bead.

図３、図４、図９に示すように、筒体３０は、クロスメンバ１４の車幅方向の端部の内部に設けられ、ボルト２８を挿通させることでボルト２８と雌ねじ部材３２とで挟持される。
本実施の形態では、ボルト２８はワッシャ付きボルトであり、ボルト２８に設けられたワッシャ２８Ａの外径は、筒体３０の外径よりも大きい寸法で形成されている。
また、サスペンションクロスメンバ１４の車幅方向の端部を構成するロアメンバプレート１４Ａとアッパメンバプレート１４Ｂには、ボルト挿通孔１４１０、１４１２が設けられ、筒体３０は、サスペンションクロスメンバ１４の内部でそれらボルト挿通孔１４１０、１４１２と同軸上に配置される。
筒体３０の下部には、他の箇所に比べて外径が大きい大径部３００２が設けられている。
より詳細には、筒体３０の下部と上部は、均一内径、均一外径の円筒部３００４、３００６で形成され、筒体３０の中間部に内径および外径が次第に大きくなる曲面状の大径部３００２が形成されている。
大径部３００２の外径は、ボルト２８のワッシャ２８Ａの外径よりも十分に大きい寸法で形成されている。 As shown in FIGS. 3, 4, and 9, the cylindrical body 30 is provided inside the end of the cross member 14 in the vehicle width direction, and is clamped between the bolt 28 and the female screw member 32 by inserting the bolt 28. Is done.
In the present embodiment, the bolt 28 is a washer-equipped bolt, and the outer diameter of the washer 28 </ b> A provided on the bolt 28 is larger than the outer diameter of the cylindrical body 30.
Further, bolt insertion holes 1410 and 1412 are provided in the lower member plate 14A and the upper member plate 14B constituting the end of the suspension cross member 14 in the vehicle width direction, and the cylinder 30 is formed inside the suspension cross member 14. These bolt insertion holes 1410 and 1412 are arranged coaxially.
A large-diameter portion 3002 having a larger outer diameter than other portions is provided at the lower portion of the cylindrical body 30.
More specifically, the lower portion and the upper portion of the cylindrical body 30 are formed by cylindrical portions 3004 and 3006 having a uniform inner diameter and a uniform outer diameter, and a large diameter with a curved surface in which the inner diameter and the outer diameter gradually increase in the middle portion of the cylindrical body 30. A portion 3002 is formed.
The outer diameter of the large diameter portion 3002 is formed to be sufficiently larger than the outer diameter of the washer 28A of the bolt 28.

また、サスペンションクロスメンバ１４の車幅方向の端部の内部に、大径部３００２よりも上方の筒体３０の部分が挿通される孔４００２を有し、外周部が前記サスペンションクロスメンバ１４に溶着された補強板４０が設けられている。
このような補強板４０を設けることでサイドメンバ１２に取り付けられるサスペンションクロスメンバ１４の端部の強度の向上が図られている。
なお、大径部３００２の外径は孔４００２の内径よりも大きな寸法で形成されている。 The suspension cross member 14 has a hole 4002 through which the portion of the cylindrical body 30 above the large diameter portion 3002 is inserted inside the end in the vehicle width direction, and the outer peripheral portion is welded to the suspension cross member 14. A reinforcing plate 40 is provided.
By providing such a reinforcing plate 40, the strength of the end portion of the suspension cross member 14 attached to the side member 12 is improved.
Note that the outer diameter of the large diameter portion 3002 is larger than the inner diameter of the hole 4002.

次に作用効果について説明する。
前面衝突時、サスペンションクロスメンバ１４に対して車両後方に向かって衝撃荷重が入力すると、その荷重は、サスペンションクロスメンバ１４の端部のボルト挿通孔１４１０、１４１２の縁部からボルト２８、雌ねじ部材３２を介してサイドメンバ１２に伝達される。
サスペンションクロスメンバ１４に入力する衝撃荷重がそれほど大きくない場合は、衝撃荷重はサイドメンバ１２から後方に伝達され衝突エネルギーが吸収される。 Next, the function and effect will be described.
When an impact load is applied to the suspension cross member 14 toward the rear of the vehicle at the time of a frontal collision, the load is applied from the edge of the bolt insertion holes 1410 and 1412 at the end of the suspension cross member 14 to the bolt 28 and the female screw member 32. Is transmitted to the side member 12 via.
When the impact load input to the suspension cross member 14 is not so large, the impact load is transmitted rearward from the side member 12 and the collision energy is absorbed.

一方、サスペンションクロスメンバ１４に入力する衝撃荷重が大きい場合は、サスペンションクロスメンバ１４の端部のボルト挿通孔１４１０、１４１２の周囲のアッパメンバプレート１４Ｂおよびロアメンバプレート１４Ａの部分に亀裂が生じやがて破断する。
ボルト挿通孔１４１０、１４１２の周囲のアッパメンバプレート１４Ｂおよびロアメンバプレート１４Ａの部分が破断することにより、ロアメンバプレート１４Ａのボルト挿通孔１４１０の内径がボルト２８のワッシャ２８Ａの外径より大きくなり、また、アッパメンバプレート１４Ｂのボルト挿通孔１４１２の内径が筒体３０の上部の外径よりも大きくなると、サスペンションクロスメンバ１４が自重により下方に脱落しようとする。
しかしながら、大きくなったボルト挿通孔１４１２の周囲のアッパメンバプレート１４Ｂの部分に大径部３００２に係止されることでサスペンションクロスメンバ１４の脱落が阻止される。
したがって、脱落したサスペンションクロスメンバ１４がサスペンションクロスメンバ１４の後方に隣接して配置された車両構成部材に衝突して車両構成部材が損傷することを防止する上で有利となる。 On the other hand, when the impact load input to the suspension cross member 14 is large, the upper member plate 14B and the lower member plate 14A around the bolt insertion holes 1410 and 1412 at the end of the suspension cross member 14 are cracked and break. To do.
When the upper member plate 14B and the lower member plate 14A around the bolt insertion holes 1410 and 1412 are broken, the inner diameter of the bolt insertion hole 1410 of the lower member plate 14A becomes larger than the outer diameter of the washer 28A of the bolt 28, Further, when the inner diameter of the bolt insertion hole 1412 of the upper member plate 14B is larger than the outer diameter of the upper portion of the cylindrical body 30, the suspension cross member 14 tends to drop downward due to its own weight.
However, the suspension cross member 14 is prevented from falling off by being locked to the large diameter portion 3002 at the portion of the upper member plate 14B around the enlarged bolt insertion hole 1412.
Therefore, it is advantageous in preventing the dropped suspension cross member 14 from colliding with the vehicle component disposed adjacent to the rear of the suspension cross member 14 and damaging the vehicle component.

さらに本実施の形態では、ボルト挿通孔１４１０、１４１２の周囲のアッパメンバプレート１４Ｂおよびロアメンバプレート１４Ａの部分が大きく破断し、サスペンションクロスメンバ１４が自重により下方に脱落しようとしても、補強板４０の孔４００２の縁部が筒体３０の大径部３００２に係止されることでサスペンションクロスメンバ１４の脱落が阻止される。
したがって、脱落したサスペンションクロスメンバ１４がサスペンションクロスメンバ１４の後方に隣接して配置された車両構成部材に衝突して車両構成部材が損傷することを防止する上でより有利となる。 Further, in the present embodiment, even if the upper member plate 14B and the lower member plate 14A around the bolt insertion holes 1410 and 1412 are largely broken and the suspension cross member 14 attempts to drop downward due to its own weight, the reinforcing plate 40 Since the edge of the hole 4002 is locked to the large diameter portion 3002 of the cylindrical body 30, the suspension cross member 14 is prevented from falling off.
Therefore, it is more advantageous to prevent the dropped suspension cross member 14 from colliding with the vehicle component disposed adjacent to the rear of the suspension cross member 14 and damaging the vehicle component.

また、サイドメンバ１２に、雌ねじ部材３２の車両前後方向の倒れを阻止する倒れ阻止部材を設けたので、雌ねじ部材３２に伝達される衝撃荷重によって雌ねじ部材３２が車両前後方向に倒れることでサイドメンバ１２の底壁部３４０４に亀裂が生じて雌ねじ部材３２が脱落することを抑制する上で有利となり、したがって、サスペンションクロスメンバ１４の脱落を防止する上でより有利となる。
また、倒れ阻止部材は、雌ねじ部材３２の車幅方向両側に位置する突出部によって雌ねじ部材３２の車幅方向の倒れも阻止するので、雌ねじ部材３２に伝達される衝撃荷重によって雌ねじ部材３２が車幅方向に倒れることでサイドメンバ１２の底壁部３４０４に亀裂が生じて雌ねじ部材３２が脱落することを抑制する上でより有利となり、したがって、サスペンションクロスメンバ１４の脱落を防止する上でより一層有利となる。
なお、本実施の形態では、車両前後方向の双方に倒れ阻止部材（前倒れ阻止部材３６、後倒れ阻止部材３８）を設けた場合について説明したが、車両前後方向の少なくとも一方に倒れ阻止部材を設けてもよい。
しかしながら、本実施の形態のようにすると、雌ねじ部材３２が脱落することを抑制する上でより有利となり、したがって、サスペンションクロスメンバ１４の脱落を防止する上でより有利となる。
また、本実施形態の様にサスペンションクロスメンバ１４の脱落を防止することで、サスペンションクロスメンバ１４の後方に配置されたサイドメンバ１２の中間部１２Ｃに衝突荷重を分散できるので、衝突エネルギを吸収する上で有利となる。 Further, since the side member 12 is provided with a fall prevention member that prevents the female screw member 32 from falling in the vehicle front-rear direction, the side member is caused by the female screw member 32 falling in the vehicle front-rear direction due to an impact load transmitted to the female screw member 32. This is advantageous in preventing the female screw member 32 from dropping due to a crack in the bottom wall portion 3404 of the twelve, and thus more advantageous in preventing the suspension cross member 14 from falling off.
Further, since the fall prevention member prevents the female screw member 32 from falling in the vehicle width direction by the protruding portions located on both sides of the female screw member 32 in the vehicle width direction, the female screw member 32 is moved by the impact load transmitted to the female screw member 32. By falling in the width direction, it becomes more advantageous in suppressing the bottom wall portion 3404 of the side member 12 from cracking and preventing the female screw member 32 from falling off. Therefore, it is even more effective in preventing the suspension cross member 14 from falling off. It will be advantageous.
In the present embodiment, the case where the fall prevention members (the forward fall prevention member 36 and the rear fall prevention member 38) are provided in both the vehicle longitudinal direction has been described. However, the fall prevention member is provided in at least one of the vehicle longitudinal directions. It may be provided.
However, according to the present embodiment, it is more advantageous in suppressing the female screw member 32 from falling off, and therefore more advantageous in preventing the suspension cross member 14 from falling off.
Further, by preventing the suspension cross member 14 from falling off as in this embodiment, the collision load can be distributed to the intermediate portion 12C of the side member 12 disposed behind the suspension cross member 14, so that the collision energy is absorbed. This is advantageous.

また、本実施の形態では、サスペンションクロスメンバ１４の端部に補強板４０を設け、補強板４０の孔の縁部が筒体３０の大径部３００２に係止することでサスペンションクロスメンバ１４の脱落を防止する場合について説明した。
しかしながら、補強板４０を省略して以下のように構成してもよい。
すなわち、サスペンションクロスメンバ１４の端部を構成するアッパメンバプレート１４Ｂの部分の肉厚を大きく確保し、アッパメンバプレート１４Ｂのボルト挿通孔３４１０の周囲の部分の強度を高くする。
これにより、前面衝突時の衝撃荷重によりアッパメンバプレート１４Ｂのボルト挿通孔３４１０の周囲の部分に亀裂が生じにくくなり、ボルト挿通孔３４１０の内径を大径部３００２よりも小さい寸法に維持する上で有利となり、サスペンションクロスメンバ１４の脱落を防止する上で有利となる。 In the present embodiment, the reinforcing plate 40 is provided at the end of the suspension cross member 14, and the edge of the hole of the reinforcing plate 40 is engaged with the large-diameter portion 3002 of the cylindrical body 30, whereby the suspension cross member 14. The case of preventing dropout has been described.
However, the reinforcing plate 40 may be omitted and configured as follows.
That is, the thickness of the portion of the upper member plate 14B constituting the end portion of the suspension cross member 14 is ensured to be large, and the strength of the portion around the bolt insertion hole 3410 of the upper member plate 14B is increased.
Thus, cracks are less likely to occur in the portion around the bolt insertion hole 3410 of the upper member plate 14B due to the impact load at the time of a frontal collision, and the inner diameter of the bolt insertion hole 3410 is maintained to be smaller than that of the large diameter portion 3002. This is advantageous in terms of preventing the suspension cross member 14 from falling off.

１０ 車両
１２ サイドメンバ
１４ サスペンションクロスメンバ（クロスメンバ）
２８ ボルト
３０ 筒体
３００２ 大径部
３２ 雌ねじ部材
３６ 前倒れ阻止部材（倒れ阻止部材）
３６０６ 突出板部（突出部）
３８ 後倒れ阻止部材（倒れ阻止部材）
３８０４Ａ 突出部
４０ 補強板 10 Vehicle 12 Side member 14 Suspension cross member (cross member)
28 Bolt 30 Cylindrical body 3002 Large diameter portion 32 Female thread member 36 Forward fall prevention member (fall prevention member)
3606 Projection plate (projection)
38 Rear fall prevention member (fall prevention member)
3804A Protrusion 40 Reinforcing plate

Claims (4)

車幅方向に延在する中空状のクロスメンバの車幅方向の端部を車両の前後方向に延在するサイドメンバにボルトにより取り付ける取り付け構造であって、
前記サイドメンバに設けられ前記ボルトが螺合される雌ねじ部材と、
前記クロスメンバの車幅方向の端部の内部に設けられ、前記ボルトを挿通させることで前記ボルトと前記雌ねじ部材とで挟持される筒体とを備え、
前記筒体に、前記筒体の他の箇所に比べて外径が大きい大径部が設けられている、
ことを特徴とするクロスメンバの取り付け構造。 A mounting structure in which an end portion in the vehicle width direction of a hollow cross member extending in the vehicle width direction is attached to a side member extending in the front-rear direction of the vehicle with a bolt,
A female screw member provided on the side member and to which the bolt is screwed;
Provided inside the end of the cross member in the vehicle width direction, and includes a cylindrical body sandwiched between the bolt and the female screw member by inserting the bolt.
The cylindrical body is provided with a large-diameter portion having a large outer diameter compared to other portions of the cylindrical body.
A cross member mounting structure characterized by that. 前記クロスメンバの車幅方向の端部は、サイドメンバの下方に取着され、
前記筒体と前記雌ねじ部材は上下方向に延在しており、
前記クロスメンバの車幅方向の端部の内部に、前記大径部よりも上方の前記筒体の部分が挿通され、外周部が前記クロスメンバに取着された補強板が設けられている、
ことを特徴とする請求項１記載のクロスメンバの取り付け構造。 The end of the cross member in the vehicle width direction is attached below the side member,
The cylindrical body and the female screw member extend in the vertical direction,
Inside the end portion of the cross member in the vehicle width direction, a reinforcing plate is provided in which a portion of the cylindrical body above the large diameter portion is inserted and an outer peripheral portion is attached to the cross member.
The cross member mounting structure according to claim 1. 前記サイドメンバに、前記雌ねじ部材の車両前後方向の少なくとも一方に前記雌ねじ部材の車両前後方向の倒れを阻止する倒れ阻止部材が設けられている、
ことを特徴とする請求項１または２記載のクロスメンバの取り付け構造。 The side member is provided with a fall prevention member that prevents the female screw member from falling in the vehicle longitudinal direction on at least one of the female screw members in the vehicle longitudinal direction.
3. The cross member mounting structure according to claim 1, wherein the cross member is mounted. 前記倒れ阻止部材は、前記雌ねじ部材の車幅方向両側に位置する突出部が備えられている、
ことを特徴とする請求項３記載のクロスメンバの取り付け構造。 The fall prevention member is provided with protrusions located on both sides in the vehicle width direction of the female screw member.
The cross member mounting structure according to claim 3.
JP2017154349A 2017-08-09 2017-08-09 Cross member attachment structure Pending JP2019031234A (en)

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