JP2016168947A - Joining structure of lower arm of vehicle - Google Patents

Joining structure of lower arm of vehicle Download PDF

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JP2016168947A
JP2016168947A JP2015050469A JP2015050469A JP2016168947A JP 2016168947 A JP2016168947 A JP 2016168947A JP 2015050469 A JP2015050469 A JP 2015050469A JP 2015050469 A JP2015050469 A JP 2015050469A JP 2016168947 A JP2016168947 A JP 2016168947A
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pair
support
width direction
vehicle width
lower arms
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JP6507741B2 (en
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亮 時實
Ryo Tokizane
亮 時實
崇道 外山
Takamichi Toyama
崇道 外山
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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Abstract

PROBLEM TO BE SOLVED: To promote an efficiency of work for mounting front ends of a pair of lower arms on a side frame.SOLUTION: A lower end of a support piece 36B positioned inside in a vehicle width direction of a pair of support pieces 36A and 36B is positioned at a place deviated toward inside in the vehicle width direction relative to a support shaft supporting part 3604, and a lower part of the support piece 36B is formed as an inclined part 3612 which gradually separates from the support shaft supporting part 3604 in the vehicle width direction as approaching a lower side. Front ends 16A of a pair of lower arms 16 are inserted between the pair of support pieces 36A and 36B and moved upward from below, so that the front ends 16A of the pair of lower arms 16 are guided to outside in the vehicle width direction by the inclined part 3612, which allows the front ends 16A of the pair of lower arms 16 to be more easily and more surely inserted, in open-front postures, between the pair of support pieces 36A and 36B.SELECTED DRAWING: Figure 4

Description

本発明は車両のロアアームの結合構造に関し、より詳細には車両のリンク式サスペンションにおけるロアアームの結合構造に関する。   The present invention relates to a lower arm coupling structure of a vehicle, and more particularly to a lower arm coupling structure in a link suspension of a vehicle.

車両のリンク式サスペンションとして、車体に連結された一対のアッパーアームおよび一対のロアアームによりアクスルアッシーを支持すると共に、車体とアクスルアッシーとをラテラルロッドで連結するラテラルロッド付き４リンク式サスペンションが知られている（特許文献１、２参照）。
また、リンク式サスペンションとして、一対のロアアームによりアクスルアッシーを支持すると共に、車体とアクスルアッシーとをラテラルロッドで連結する３リンク式サスペンションも知られている。
このようなリンク式サスペンションでは、一対のロアアームの前端は一対のサイドフレームに、車幅方向に対向しつつ各サイドフレームから下方に延在する一対の支持片の間に支軸を介して揺動可能に結合されている。
また、一対のロアアームの後端は、弾性部材が組み込まれたブッシュを介してアクスルアッシーに結合され、アクスルアッシーはロアアームの後端に対して、ブッシュの弾性部材がたわむ範囲内で上下方向や車幅方向に変位可能となっている。
サスペンションの組み立て手順は以下の通りである。
まず、一対のロアアームの後端をブッシュを介してアクスルアッシーに組み付ける。
次いで、一対のロアアームおよびアクスルアッシーを一対のサイドフレームの下方から上方に移動させ、一対のロアアームの前端を一対の支持片の間に挿入して支軸を介して一対の支持片に結合する。 As a link suspension of a vehicle, there is known a 4-link suspension with a lateral rod that supports a axle assembly by a pair of upper arms and a pair of lower arms coupled to the vehicle body and connects the vehicle body and the axle assembly by a lateral rod. (See Patent Documents 1 and 2).
Further, as a link type suspension, there is also known a three link type suspension in which an axle assembly is supported by a pair of lower arms and a vehicle body and an axle assembly are connected by a lateral rod.
In such a link-type suspension, the front ends of the pair of lower arms swing with a pair of side frames via a support shaft between a pair of support pieces that extend downward from each side frame while facing the vehicle width direction. It is combined as possible.
The rear ends of the pair of lower arms are coupled to the axle assembly via a bushing in which an elastic member is incorporated. The axle assembly can move in the vertical direction or the vehicle within the range where the elastic member of the bush is bent with respect to the rear end of the lower arm. It can be displaced in the width direction.
The procedure for assembling the suspension is as follows.
First, the rear ends of the pair of lower arms are assembled to the axle assembly via the bush.
Next, the pair of lower arms and the axle assembly are moved upward from below the pair of side frames, the front ends of the pair of lower arms are inserted between the pair of support pieces, and are coupled to the pair of support pieces via the support shafts.

特許第４６７７９５４号公報Japanese Patent No. 4679954 特開２００７−３２０５３２号公報JP 2007-320532 A

ところで、一対のロアアームは、車両前方に至るにつれて次第に車幅方向外側に変位する前開きの姿勢で一対のサイドフレームに取り付けられる場合、あるいは、車両前方に至るにつれて次第に車幅方向内側に変位する前閉じの姿勢で一対のサイドフレームに取り付けられる場合がある。
この場合、一対のロアアームの後端はブッシュを介してアクスルアッシーに結合されていることから、ブッシュの弾性部材の弾性力に抗して一対のロアアームを前開きの姿勢に保持した状態で、あるいは、前閉じの姿勢に保持した状態で、一対のロアアームを一対のサイドフレームへ取り付ける作業を行なう必要がある。
すなわち、一対のロアアームを一対のサイドフレームへ取り付ける作業は、ブッシュの弾性部材の弾性力に抗して一対のロアアームを前開きの姿勢に保持する作業、あるいは、前閉じの姿勢に保持する作業が必要であることから、手間暇のかかる煩雑な作業となっている。
本発明は、上記事情に鑑みなされたものであり、一対のロアアームの前端をサイドフレームへ取り付ける作業の効率化を図る上で有利な車両のロアアームの結合構造を提供することを目的とする。 By the way, the pair of lower arms is attached to the pair of side frames in a front opening posture that gradually displaces outward in the vehicle width direction as it reaches the front of the vehicle, or before it gradually displaces inward in the vehicle width direction as it reaches the front of the vehicle. It may be attached to a pair of side frames in a closed posture.
In this case, since the rear ends of the pair of lower arms are coupled to the axle assembly via the bush, the pair of lower arms are held in a front-opening posture against the elastic force of the elastic member of the bush, or It is necessary to perform an operation of attaching the pair of lower arms to the pair of side frames while being held in the front-closed posture.
In other words, the work of attaching the pair of lower arms to the pair of side frames includes the work of holding the pair of lower arms in the front open position against the elastic force of the elastic member of the bush, or the work of holding the front arm in the front closed position. Since it is necessary, it is a troublesome and time-consuming work.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle lower arm coupling structure that is advantageous in improving the efficiency of the work of attaching the front ends of a pair of lower arms to a side frame.

上記目的を達成するために、請求項１記載の発明は、アクスルアッシーの車幅方向の両端を支持する一対のロアアームを備え、前記一対のロアアームの前端は前記一対のサイドフレームに、車幅方向に対向しつつ各サイドフレームから下方に延在する一対の支持片の間に支軸を介して揺動可能に結合されている車両のリンク式サスペンションであって、前記一対の支持片のうちの少なくとも一方の支持片の下端は、前記支軸を支持する前記支持片の支軸支持部に対して車幅方向に偏位した箇所に位置し、前記支軸支持部の下方の前記支持片の箇所と前記下端との間に、下方に至るにつれて車幅方向において前記支軸支持部から次第に離れる傾斜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、前記傾斜部の下端は、前記支持片の下端で構成されていることを特徴とする。
請求項３記載の発明は、前記一対の支持片のうちの他方の支持片の下端は、車幅方向において前記支軸支持部と同じ箇所に位置していることを特徴とする。 In order to achieve the above object, the invention according to claim 1 includes a pair of lower arms that support both ends of the axle assembly in the vehicle width direction, and the front ends of the pair of lower arms are disposed in the vehicle width direction of the pair of side frames. A link-type suspension of a vehicle that is swingably coupled via a support shaft between a pair of support pieces that extend downward from each side frame while facing each other. The lower end of at least one support piece is located at a position deviated in the vehicle width direction with respect to the support portion of the support piece that supports the support shaft, and the lower end of the support piece below the support portion is supported. An inclined portion is provided between the portion and the lower end so as to gradually move away from the support shaft support portion in the vehicle width direction as it goes downward.
The invention according to claim 2 is characterized in that a lower end of the inclined portion is constituted by a lower end of the support piece.
The invention according to claim 3 is characterized in that the lower end of the other support piece of the pair of support pieces is located at the same position as the support shaft support portion in the vehicle width direction.

請求項１記載の発明によれば、一対のロアアームの前端を一対の支持片の間に挿入して下方から上方に移動させることにより、一対のロアアームの前端が傾斜部によって車幅方向外側あるいは内側に案内されるので、従来のようにブッシュの弾性部材の弾性力に抗して一対のロアアームを前開きの姿勢に保持する作業、あるいは、前閉じの姿勢に保持する作業が軽減され、より簡単にかつより確実に一対のロアアームの前端を一対の支持片の間に挿入できる。したがって、前開き姿勢あるいは前閉じ姿勢の一対のロアアームの前端をサイドフレームへ取り付ける作業の効率化を図る上で有利となる。
請求項２記載の発明によれば、支軸支持部の下方の支持片部分が全て傾斜部で形成されているので、傾斜部による一対のロアアームの前端の案内を容易に行なう上で有利となる。
請求項３記載の発明によれば、他方の支持片については支軸支持部の下方の箇所に何ら加工を施していないため、最小限の加工により一対のロアアームの前端をサイドフレームへ取り付ける作業の効率化を図る上で有利となる。 According to the first aspect of the present invention, the front ends of the pair of lower arms are inserted between the pair of support pieces and moved upward from below, so that the front ends of the pair of lower arms are located outside or inward in the vehicle width direction by the inclined portion. Therefore, the work of holding the pair of lower arms in the front open position against the elastic force of the elastic member of the bush or the work of holding the front arm in the front closed position as before is reduced and easier. In addition, the front ends of the pair of lower arms can be inserted between the pair of support pieces more reliably. Therefore, it is advantageous in improving the efficiency of attaching the front ends of the pair of lower arms in the front opening posture or the front closing posture to the side frame.
According to the second aspect of the present invention, since the support piece portions below the support shaft support portion are all formed by the inclined portions, it is advantageous for easily guiding the front ends of the pair of lower arms by the inclined portions. .
According to the invention described in claim 3, since the other support piece is not processed at any position below the support shaft support portion, the work of attaching the front ends of the pair of lower arms to the side frame with minimal processing is performed. This is advantageous for improving efficiency.

実施の形態の車両のロアアームの結合構造の側面図である。It is a side view of the coupling structure of the lower arm of the vehicle of the embodiment. 実施の形態の車両のロアアームの結合構造を下方から見た図である。It is the figure which looked at the joint structure of the lower arm of the vehicle of an embodiment from the lower part. ロアアームの前端のサイドフレームへの組み付け前の状態を示す側面図である。It is a side view which shows the state before the assembly | attachment to the side frame of the front end of a lower arm. （Ａ）はロアアームの前端のサイドフレームへの組み付け前の状態を示す説明図、（Ｂ）はロアアームの前端をサイドフレームに組み付けた状態を示す説明図である。(A) is explanatory drawing which shows the state before the assembly | attachment to the side frame of the front end of a lower arm, (B) is explanatory drawing which shows the state which assembled | attached the front end of the lower arm to 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。
図１、図２に示すように、本発明が適用される車両は、一対のサイドフレーム１０と、複数のクロスメンバ１２とを備え、後輪駆動用のアクスルアッシー１４は、一対のロアアーム１６、ラテラルロッド１８を含んだ３リンク式サスペンション２で懸架されている。
なお、図中、符号ＦＲは車両前方を示し、符号ＴＯＰは車両上方を示し、符号ＬＨは車幅方向を示し、符号ＬＨ（ＯＵＴ）は車幅方向外方を示す。
一対のサイドフレーム１０は、車幅方向に間隔をおいて車両前後方向に延在している。
複数のクロスメンバ１２は、車幅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フレーム１０を連結しており、複数のクロスメンバ１２のうち２つのクロスメンバ１２は、平面視、アクスルアッシー１４を前後に挟んで配置されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vehicle to which the present invention is applied includes a pair of side frames 10 and a plurality of cross members 12, and an axle assembly 14 for driving a rear wheel includes a pair of lower arms 16, Suspended by a three-link suspension 2 including a lateral rod 18.
In the figure, reference symbol FR indicates the front of the vehicle, reference symbol TOP indicates the upper portion of the vehicle, reference symbol LH indicates the vehicle width direction, and reference symbol LH (OUT) indicates the outward in the vehicle width direction.
The pair of side frames 10 extend in the vehicle front-rear direction with an interval in the vehicle width direction.
The plurality of cross members 12 extend in the vehicle width direction at intervals in the front-rear direction of the vehicle width and connect the pair of side frames 10. Two of the cross members 12 are in plan view. The axle assembly 14 is disposed between the front and rear.

アクスルアッシー１４は、プロペラシャフトからエンジンの動力が入力される不図示のディファレンシャルギアと、ディファレンシャルギアの出力を左右の後輪に伝達する不図示のドライブシャフトと、それらを収容するアクスルハウジング１４０２とを含んで構成されている。
３リンク式サスペンション２は、一対のロアアーム１６とラテラルロッド１８に加え、一対のスプリング２０と、一対のショックアブソーバ２２と、スタビライザー２４を含んで構成されている。
一対のロアアーム１６は、アクスルアッシー１４の車幅方向の両端を支持するものであり、車両の前後方向に延在し、前端１６Ａが一対のサイドフレーム１０に連結され、後端１６Ｂがアクスルアッシー１４の車幅方向の両端に連結されている。 The axle assembly 14 includes a differential gear (not shown) to which engine power is input from the propeller shaft, a drive shaft (not shown) that transmits the output of the differential gear to the left and right rear wheels, and an axle housing 1402 that accommodates them. It is configured to include.
The 3-link suspension 2 includes a pair of springs 20, a pair of shock absorbers 22, and a stabilizer 24 in addition to the pair of lower arms 16 and the lateral rod 18.
The pair of lower arms 16 support both ends of the axle assembly 14 in the vehicle width direction, extend in the vehicle front-rear direction, the front end 16A is connected to the pair of side frames 10, and the rear end 16B is the axle assembly 14. Are connected to both ends in the vehicle width direction.

ラテラルロッド１８は、一対のサイドフレーム１０のうちの一方のサイドフレーム１０と、一対のサイドフレーム１０のうちの他方のサイドフレーム１０側のアクスルアッシー１４の車幅方向の端部とを連結している。
すなわち、ラテラルロッド１８の一端は、一対のサイドフレーム１０のうちの一方のサイドフレーム１０に設けられたブラケット２６に、軸心を車両前後方向に向けた支軸を介して上下方向に揺動可能に連結されている。
ラテラルロッド１８の他端は、一対のサイドフレーム１０のうちの他方のサイドフレーム１０寄りのアクスルアッシー１４に設けられた不図示のブラケットに、軸心を車両前後方向に向けた支軸を介して上下方向に揺動可能に連結されている。 The lateral rod 18 connects one side frame 10 of the pair of side frames 10 and an end of the axle assembly 14 on the other side frame 10 side of the pair of side frames 10 in the vehicle width direction. Yes.
That is, one end of the lateral rod 18 can swing in the vertical direction on a bracket 26 provided on one side frame 10 of the pair of side frames 10 via a support shaft whose axis is directed in the vehicle longitudinal direction. It is connected to.
The other end of the lateral rod 18 is attached to a bracket (not shown) provided on the axle assembly 14 near the other side frame 10 of the pair of side frames 10 via a support shaft whose axis is directed in the vehicle front-rear direction. It is connected so that it can swing in the vertical direction.

一対のスプリング２０は、アクスルアッシー１４を支えるものである。
図２に示すように、アクスルアッシー１４の上方に位置する２つのクロスメンバ１２の車幅方向の端部間にブラケット２８がそれぞれ架け渡され、一対のスプリング２０は、それらブラケットとアクスルアッシー１４の両端寄りの箇所との間に設けられている。
一対のショックアブソーバ２２は、スプリング２０の動きを制限するものである。
一対のショックアブソーバ２２は、アクスルアッシー１４の両端寄りの箇所と、それら箇所に対応する一対のサイドフレーム１０の箇所との間に設けられている。
スタビライザー２４は、車体のローリングを抑制するもので、一対のサイドフレーム１０とアクスルアッシー１４との間に設けられている。
なお、図１において符号３０はホイールハブを示している。 The pair of springs 20 support the axle assembly 14.
As shown in FIG. 2, brackets 28 are bridged between the end portions in the vehicle width direction of the two cross members 12 positioned above the axle assembly 14, and the pair of springs 20 are connected between the bracket and the axle assembly 14. It is provided between the places near both ends.
The pair of shock absorbers 22 limit the movement of the spring 20.
The pair of shock absorbers 22 is provided between locations near the both ends of the axle assembly 14 and locations of the pair of side frames 10 corresponding to these locations.
The stabilizer 24 suppresses rolling of the vehicle body, and is provided between the pair of side frames 10 and the axle assembly 14.
In FIG. 1, reference numeral 30 denotes a wheel hub.

次にロアアーム１６の結合構造についてさらに詳細に説明する。
一対のロアアーム１６の後端１６Ｂに不図示のブッシュが取着されている。ブッシュは、ロアアーム１６の後端１６Ｂで支持された外筒と、外筒の内周面に取着された弾性部材と、弾性部材の内周面に取着された内筒とを備えている。
このブッシュの内筒の内側にアクスルアッシー１４の両端の箇所（アクスルハウジング１４０２の両端の箇所）が回転可能に挿入されることで、一対のロアアーム１６の後端１６Ｂとアクスルアッシー１４の両端とが結合されている。
一対のロアアーム１６の後端１６Ｂとアクスルアッシー１４の両端とが結合された状態で、ロアアーム１６の後端１６Ｂに対してアクスルアッシー１４の端部は、弾性部材がたわむ範囲内で上下方向や車幅方向に変位可能である。言い換えると、アクスルアッシー１４に対してロアアーム１６の後端１６Ｂは、弾性部材がたわむ範囲内で上下方向や車幅方向に変位可能である。 Next, the coupling structure of the lower arm 16 will be described in more detail.
A bush (not shown) is attached to the rear ends 16B of the pair of lower arms 16. The bush includes an outer cylinder supported by the rear end 16B of the lower arm 16, an elastic member attached to the inner peripheral surface of the outer cylinder, and an inner cylinder attached to the inner peripheral surface of the elastic member. .
The ends of the axle assembly 14 (locations of both ends of the axle housing 1402) are rotatably inserted into the inner cylinder of the bush so that the rear ends 16B of the pair of lower arms 16 and the ends of the axle assembly 14 are connected. Are combined.
In a state where the rear ends 16B of the pair of lower arms 16 and the both ends of the axle assembly 14 are coupled, the end of the axle assembly 14 with respect to the rear end 16B of the lower arm 16 can move in the vertical direction or within the range of the elastic member. It can be displaced in the width direction. In other words, the rear end 16B of the lower arm 16 with respect to the axle assembly 14 can be displaced in the vertical direction or the vehicle width direction within a range where the elastic member bends.

一対のロアアーム１６の前端１６Ａにブッシュ３２が取着されている。ブッシュ３２は、図４（Ａ）に示すように、ロアアーム１６の前端１６Ａで支持された外筒３２０２と、外筒３２０２の内周面に取着された弾性部材３２０４と、弾性部材３２０４の内周面に取着された内筒３２０６とを備えている。
一対のロアアーム１６の前端１６Ａは一対のサイドフレーム１０に、車幅方向に対向しつつ各サイドフレーム１０から下方に延在する一対の支持片３６Ａ、３６Ｂの間に支軸を介して揺動可能に結合されている。
より詳細には、一対のサイドフレーム１０にロアアーム１６取着用のブラケット３６が設けられている。
図１、図２、図４（Ａ）に示すように、ブラケット３６は、一対の支持片３６Ａ、３６Ｂに加え、一対の支持片３６Ａ、３６Ｂの前縁間を連結する前連結片３６Ｃ、一対の支持片３６Ａ、３６Ｂの上部間を連結する上連結片３６Ｄを備え、一対の支持片３６Ａ、３６Ｂの上端、前連結片３６Ｃの上端、上連結片３６Ｄがサイドフレーム１０に溶着されている。 A bush 32 is attached to the front ends 16 </ b> A of the pair of lower arms 16. As shown in FIG. 4A, the bush 32 includes an outer cylinder 3202 supported by the front end 16 A of the lower arm 16, an elastic member 3204 attached to the inner peripheral surface of the outer cylinder 3202, and an inner part of the elastic member 3204. And an inner cylinder 3206 attached to the peripheral surface.
The front ends 16A of the pair of lower arms 16 can swing with respect to the pair of side frames 10 via a support shaft between a pair of support pieces 36A and 36B extending downward from the side frames 10 while facing the vehicle width direction. Is bound to.
More specifically, a bracket 36 for attaching the lower arm 16 is provided on the pair of side frames 10.
As shown in FIGS. 1, 2, and 4A, the bracket 36 includes a pair of front connecting pieces 36C that connect the front edges of the pair of supporting pieces 36A and 36B, in addition to the pair of supporting pieces 36A and 36B. The upper connection pieces 36D for connecting the upper portions of the support pieces 36A, 36B are provided, and the upper ends of the pair of support pieces 36A, 36B, the upper ends of the front connection pieces 36C, and the upper connection pieces 36D are welded to the side frame 10.

本実施の形態では一対のロアアーム１６は、前開き姿勢で配置され、一対のロアアーム１６は、車両前方に至るにつれて次第に車幅方向外側に変位する姿勢で配置されている。
このような一対のロアアーム１６の姿勢に対応して、一対の支持片３６Ａ、３６Ｂは次のように設けられている。
図４（Ａ）に示すように、一対の支持片３６Ａ、３６Ｂの上部３６０２は、サイドフレーム１０から下方に至るにつれ互いに平行しつつ車幅方向外側に変位する傾斜部となっている。
上部に続く一対の支持片３６Ａ、３６Ｂの上下中間部は、互いに平行しつつ上下方向に延在している。
上下中間部は、支軸を支持する支軸支持部３６０４として形成され、支軸支持部３６０４は支軸を挿通する支軸挿通孔３６０６を含んで構成されている。
一対の支持片３６Ａ、３６Ｂのうち車幅方向外側に位置する支持片３６Ａの上下中間部に続く下部３６０８は、支軸支持部３６０４と連続状に上下方向に延在している。すなわち、車幅方向外側に位置する支持片３６Ａの下端は、車幅方向において支軸支持部３６０４と同じ箇所に位置している。 In the present embodiment, the pair of lower arms 16 are arranged in a front-opening posture, and the pair of lower arms 16 are arranged in a posture that gradually displaces outward in the vehicle width direction toward the front of the vehicle.
Corresponding to the posture of the pair of lower arms 16, the pair of support pieces 36A and 36B are provided as follows.
As shown in FIG. 4A, the upper portions 3602 of the pair of support pieces 36A and 36B are inclined portions that are displaced outward in the vehicle width direction while being parallel to each other as they extend downward from the side frames 10.
The upper and lower intermediate portions of the pair of support pieces 36A and 36B following the upper portion extend in the vertical direction while being parallel to each other.
The upper and lower intermediate portions are formed as a support shaft support portion 3604 that supports the support shaft, and the support shaft support portion 3604 includes a support shaft insertion hole 3606 through which the support shaft is inserted.
A lower portion 3608 following the upper and lower intermediate portion of the support piece 36A located on the outer side in the vehicle width direction of the pair of support pieces 36A and 36B extends in the vertical direction in a continuous manner with the support shaft support portion 3604. That is, the lower end of the support piece 36A located on the outer side in the vehicle width direction is located at the same location as the support shaft support portion 3604 in the vehicle width direction.

一対の支持片３６Ａ、３６Ｂのうち車幅方向内側に位置する支持片３６Ｂの下部の下端３６１０は、支軸支持部３６０４に対して車幅方向内側に偏位した箇所に位置している。
そして、支持片３６Ｂの支軸支持部３６０４に続く下部は、下方に至るにつれて車幅方向において支軸支持部３６０４から次第に離れる傾斜部３６１２として形成されている。 The lower end 3610 of the lower part of the support piece 36B located on the inner side in the vehicle width direction of the pair of support pieces 36A, 36B is located at a position displaced inward in the vehicle width direction with respect to the support shaft support part 3604.
The lower portion of the support piece 36B following the support shaft support portion 3604 is formed as an inclined portion 3612 that gradually separates from the support shaft support portion 3604 in the vehicle width direction as it goes downward.

次にアクスルアッシー１４およびロアアーム１６の組み付けについて説明する。
まず、アクスルアッシー１４の両端にロアアーム１６の後端１６Ｂを組み付ける。
次いで、図３に示すように、一対のロアアーム１６の前後方向を一対のサイドフレーム１０の前後方向に合わせた状態で一対のロアアーム１６が組み付けられたアクスルアッシー１４を一対のサイドフレーム１０の下方から上方に持ち上げる。
この状態で、一対のスプリング２０、一対のショックアブソーバ２２、スタビライザー２４を介してアクスルアッシー１４を一対のサイドフレーム１０および一対のクロスメンバ１２に対して組み付ける。
また、図４（Ａ）、（Ｂ）に示すように、一対のロアアーム１６の前端１６Ａをそれぞれブラケット３６の一対の支持片３６Ａ、３６Ｂの間に挿入し、支持片３６Ａ、３６Ｂの支軸挿通孔３６０６およびロアアーム１６の前端１６Ａのブッシュ３２の内筒３２０６の内側に支軸としてのボルト３８を挿通し、ボルト３８にナット４０を締結することで一対のロアームの前端１６Ａを一対のサイドフレーム１０に対して組み付ける。 Next, assembly of the axle assembly 14 and the lower arm 16 will be described.
First, the rear end 16 </ b> B of the lower arm 16 is assembled to both ends of the axle assembly 14.
Next, as shown in FIG. 3, the axle assembly 14 in which the pair of lower arms 16 is assembled from below the pair of side frames 10 in a state in which the pair of lower arms 16 is aligned in the front-rear direction of the pair of side frames 10. Lift up.
In this state, the axle assembly 14 is assembled to the pair of side frames 10 and the pair of cross members 12 via the pair of springs 20, the pair of shock absorbers 22, and the stabilizer 24.
4A and 4B, the front ends 16A of the pair of lower arms 16 are inserted between the pair of support pieces 36A and 36B of the bracket 36, respectively, and the support shafts 36A and 36B are inserted through the support shafts. A bolt 38 as a support shaft is inserted inside the hole 3606 and the inner cylinder 3206 of the bush 32 of the front end 16A of the lower arm 16, and a nut 40 is fastened to the bolt 38 so that the front end 16A of the pair of lower arms is connected to the pair of side frames 10. Assemble against.

一対のロアームの前端１６Ａを一対のサイドフレーム１０に組み付ける際、一対のロアアーム１６の後端１６Ｂは、ブッシュを介してアクスルアッシー１４の両端に結合されているため、ブッシュの弾性部材の弾性力により一対のロアアーム１６はアクスルアッシー１４の軸心に対して直交する方向に延在した状態となっている。
したがって、一対のロアアーム１６を前開き姿勢として組み付けるには、弾性部材の弾性力に抗して一対のロアアーム１６を前開き姿勢に保持させて一対の支持片３６Ａ、３６Ｂに組み付けなければならない。すなわち、一対のロアアーム１６の前端１６Ａを車幅方向に広げた状態に保持しつつ、一対のロアアーム１６の前端１６Ａを一対の支持片３６Ａ、３６Ｂの間に挿入する必要がある。
そして、一対のロアアーム１６の前端１６Ａを車幅方向に広げつつ、一対のロアアーム１６の前端１６Ａを一対の支持片３６Ａ、３６Ｂの間に挿入する作業は、手間暇のかかる煩雑な作業である。 When the front ends 16A of the pair of lower arms are assembled to the pair of side frames 10, the rear ends 16B of the pair of lower arms 16 are coupled to both ends of the axle assembly 14 via bushes, so that the elastic force of the elastic members of the bushes The pair of lower arms 16 is in a state extending in a direction orthogonal to the axis of the axle assembly 14.
Therefore, in order to assemble the pair of lower arms 16 in the front opening posture, the pair of lower arms 16 must be held in the front opening posture against the elastic force of the elastic member and assembled to the pair of support pieces 36A and 36B. That is, it is necessary to insert the front ends 16A of the pair of lower arms 16 between the pair of support pieces 36A and 36B while holding the front ends 16A of the pair of lower arms 16 in a state of being widened in the vehicle width direction.
The operation of inserting the front ends 16A of the pair of lower arms 16 between the pair of support pieces 36A and 36B while expanding the front ends 16A of the pair of lower arms 16 in the vehicle width direction is a cumbersome operation that requires time and effort.

本実施の形態では、一対の支持片３６Ａ、３６Ｂのうち車幅方向内側に位置する支持片３６Ｂの下端は、支軸支持部３６０４に対して車幅方向内側に偏位した箇所に位置し、支持片３６Ｂの下部は、下方に至るにつれて車幅方向において支軸支持部３６０４から次第に離れる傾斜部３６１２として形成されている。
そのため、図４（Ａ）、（Ｂ）に示すように、一対のロアアーム１６の前端１６Ａを一対の支持片３６Ａ、３６Ｂの間に挿入して下方から上方に移動させることにより、一対のロアアーム１６の前端１６Ａが傾斜部３６１２によって車幅方向外側に案内されるので、より簡単にかつより確実に一対のロアアーム１６の前端１６Ａを前開きの姿勢として一対の支持片３６Ａ、３６Ｂの間に挿入できる。
したがって、前開き姿勢の一対のロアアーム１６の前端１６Ａをサイドフレーム１０へ取り付ける作業の効率化を図る上で有利となる。 In the present embodiment, the lower end of the support piece 36B located on the inner side in the vehicle width direction among the pair of support pieces 36A and 36B is located at a position displaced inward in the vehicle width direction with respect to the support shaft support part 3604. The lower portion of the support piece 36B is formed as an inclined portion 3612 that gradually separates from the support shaft support portion 3604 in the vehicle width direction as it goes downward.
Therefore, as shown in FIGS. 4A and 4B, the front ends 16A of the pair of lower arms 16 are inserted between the pair of support pieces 36A and 36B and moved upward from below, so that the pair of lower arms 16 are moved. Since the front end 16A of the pair is guided outward in the vehicle width direction by the inclined portion 3612, the front ends 16A of the pair of lower arms 16 can be inserted between the pair of support pieces 36A, 36B more easily and more reliably as a front opening posture. .
Therefore, it is advantageous in improving the efficiency of the work of attaching the front ends 16A of the pair of lower arms 16 in the front opening posture to the side frame 10.

また、本実施の形態では、支軸支持部３６０４の下方の支持片３６Ｂ部分が全て傾斜部３６１２で形成されているので、傾斜部３６１２による一対のロアアーム１６の前端１６Ａの案内を容易に行なう上で有利となる。
また、一対の支持片３６Ａ、３６Ｂの双方に傾斜部３６１２を設けても良いが、本実施の形態のように、傾斜部３６１２を車幅方向内側に位置する支持片３６Ｂのみに設けても、前開き姿勢の一対のロアアーム１６の前端１６Ａをサイドフレーム１０へ取り付ける作業の効率化を図る上で有利となる。この場合、車幅方向外側に位置する支持片３６Ａは、その支軸支持部３６０４と下端とが車幅方向において同じ位置に位置しており、すなわち、車幅方向外側に位置する支持片３６Ａにつては支軸支持部３６０４の下方の箇所に何ら加工を施していない。したがって、本実施の形態によれば、最小限の加工により一対のロアアーム１６の前端１６Ａをサイドフレーム１０へ取り付ける作業の効率化を図る上で有利となる。 In the present embodiment, since the support piece 36B portion below the support shaft support portion 3604 is all formed by the inclined portion 3612, the inclined portion 3612 can easily guide the front ends 16A of the pair of lower arms 16. Is advantageous.
Further, the inclined portion 3612 may be provided on both of the pair of support pieces 36A and 36B. However, as in the present embodiment, the inclined portion 3612 may be provided only on the support piece 36B located on the inner side in the vehicle width direction. This is advantageous in improving the efficiency of attaching the front ends 16A of the pair of lower arms 16 in the front opening posture to the side frame 10. In this case, the support piece 36A located on the outer side in the vehicle width direction has the support shaft support portion 3604 and the lower end located at the same position in the vehicle width direction, that is, on the support piece 36A located on the outer side in the vehicle width direction. Therefore, no processing is applied to the lower portion of the support shaft support portion 3604. Therefore, according to the present embodiment, it is advantageous in improving the efficiency of the work of attaching the front ends 16A of the pair of lower arms 16 to the side frame 10 with a minimum of processing.

なお、本実施の形態では、一対のロアアーム１６が前開きの姿勢で一対のサイドフレーム１０に取り付けられる場合について説明したが、一対のロアアームが車両前方に至るにつれて次第に車幅方向内側に変位する前閉じの姿勢で一対のサイドフレーム１０に取り付けられる場合にも本発明は無論適用される。その場合には、一対の支持片３６Ａ、３６Ｂのうちの少なくとも車幅方向外側の支持片３６Ａの下端が、支軸を支持する支持片３６Ａの支軸支持部３６０４に対して車幅方向内側に偏位した箇所に位置し、支軸支持部３６０４の下方の支持片３６Ａの箇所と下端との間に、下方に至るにつれて車幅方向において支軸支持部３６０４から次第に離れる傾斜部が設けられる。
また、本実施の形態では、リンク式サスペンションが３リンク式サスペンションである場合について説明したが、本発明は、３リンク式サスペンションに一対のアッパーアームが加えられたラテラルロッド付き４リンク式サスペンションなど、従来公知の様々なリンク式サスペンションにも適用可能である。 In the present embodiment, the case where the pair of lower arms 16 are attached to the pair of side frames 10 in a front-opening posture has been described, but before the pair of lower arms gradually displaces inward in the vehicle width direction as they reach the front of the vehicle. Of course, the present invention is also applied to the case where the pair of side frames 10 are attached in a closed posture. In that case, at least the lower end of the support piece 36A on the outer side in the vehicle width direction of the pair of support pieces 36A, 36B is on the inner side in the vehicle width direction with respect to the support shaft support portion 3604 of the support piece 36A that supports the support shaft. An inclined portion that is located at a deviated portion and gradually separates from the support shaft support portion 3604 in the vehicle width direction as it goes downward is provided between the lower end of the support piece 36A below the support shaft support portion 3604 and the lower end.
Further, in the present embodiment, the case where the link type suspension is a three link type suspension has been described, but the present invention is a four link type suspension with a lateral rod in which a pair of upper arms is added to the three link type suspension, The present invention can also be applied to various conventionally known link type suspensions.

２ リンク式サスペンション
１０ サイドフレーム
１４ アクスルアッシー
１６ ロアアーム
１６Ａ 前端
１６Ｂ 後端
３６Ａ、３６Ｂ 一対の支持片
３６０４ 支軸支持部
３６０６ 支軸挿通孔
３６１０ 下端
３６１２ 傾斜部
３８ ボルト（支軸）
４０ ナット Two-link suspension 10 Side frame 14 Axle assembly 16 Lower arm 16A Front end 16B Rear end 36A, 36B A pair of support pieces 3604 Support shaft support portion 3606 Support shaft insertion hole 3610 Lower end 3612 Inclined portion 38 Bolt (support shaft)
40 nuts

Claims (3)

アクスルアッシーの車幅方向の両端を支持する一対のロアアームを備え、
前記一対のロアアームの前端は前記一対のサイドフレームに、車幅方向に対向しつつ各サイドフレームから下方に延在する一対の支持片の間に支軸を介して揺動可能に結合されている車両のリンク式サスペンションであって、
前記一対の支持片のうちの少なくとも一方の支持片の下端は、前記支軸を支持する前記支持片の支軸支持部に対して車幅方向に偏位した箇所に位置し、
前記支軸支持部の下方の前記支持片の箇所と前記下端との間に、下方に至るにつれて車幅方向において前記支軸支持部から次第に離れる傾斜部が設けられている、
ことを特徴とする車両のロアアームの結合構造。 It has a pair of lower arms that support both ends of the axle assembly in the vehicle width direction,
The front ends of the pair of lower arms are coupled to the pair of side frames so as to be swingable through a support shaft between a pair of support pieces facing downward in the vehicle width direction and extending downward from the side frames. A link suspension of a vehicle,
The lower end of at least one of the pair of support pieces is located at a position displaced in the vehicle width direction with respect to the support shaft support portion of the support piece that supports the support shaft,
Between the portion of the support piece below the support shaft support portion and the lower end, an inclined portion gradually separating from the support shaft support portion in the vehicle width direction as it goes down is provided.
A vehicle lower arm coupling structure. 前記傾斜部の下端は、前記支持片の下端で構成されている、
ことを特徴とする請求項１記載の車両のロアアームの結合構造。 The lower end of the inclined part is composed of the lower end of the support piece,
The vehicle lower arm coupling structure according to claim 1. 前記一対の支持片のうちの他方の支持片の下端は、車幅方向において前記支軸支持部と同じ箇所に位置している、
ことを特徴とする請求項１または２記載の車両のロアアームの結合構造。 The lower end of the other support piece of the pair of support pieces is located at the same location as the support shaft support portion in the vehicle width direction.
The vehicle lower arm coupling structure according to claim 1 or 2,
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