JP2019162916A - Suspension arm - Google Patents

Suspension arm Download PDF

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JP2019162916A
JP2019162916A JP2018051078A JP2018051078A JP2019162916A JP 2019162916 A JP2019162916 A JP 2019162916A JP 2018051078 A JP2018051078 A JP 2018051078A JP 2018051078 A JP2018051078 A JP 2018051078A JP 2019162916 A JP2019162916 A JP 2019162916A
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press
fitting
opening
reinforcing member
peripheral surface
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JP6943796B2 (en
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貴昭 宇野
Takaaki Uno
貴昭 宇野
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Futaba Industrial Co Ltd
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Futaba Industrial Co Ltd
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Abstract

To provide a suspension arm capable of enhancing stability of a holding force of a press-in member while using a fiber-reinforced resin.SOLUTION: A suspension arm for vehicle includes at least one connection part. At least one connection part has a fiber-reinforced resin-made base material, a metal-made and cylindrical reinforcement member, and a press-in member. The base material has an opening. At least a part of the reinforcement member is buried in outside of the inner peripheral surface of the opening in the base material. The press-in member is pressed in the opening. A fiber exists between the inner peripheral surface of the opening and the inner peripheral surface of the reinforcement member.SELECTED DRAWING: Figure 4

Description

本開示は、サスペンションアームに関する。   The present disclosure relates to a suspension arm.

車両用のサスペンションアームとして、ブッシュ等の保持力を維持するため、炭素繊維強化樹脂（ＣＦＲＰ）等の繊維強化樹脂を構成材料として用いたものが知られている（特許文献１参照）。   As a suspension arm for a vehicle, a suspension arm using a fiber reinforced resin such as carbon fiber reinforced resin (CFRP) as a constituent material is known in order to maintain a holding force of a bush or the like (see Patent Document 1).

このサスペンションアームでは、軽量化を図りながら剛性及び強度を高めるために、ブッシュ等の圧入部材が圧入される開口部に金属部材が埋め込まれている。   In this suspension arm, a metal member is embedded in an opening into which a press-fitting member such as a bush is press-fitted in order to increase the rigidity and strength while reducing the weight.

特開２０１７−１３２３１０号公報JP 2017-132310 A

特許文献１のように、金属部材を開口部に埋め込んだ際、金属部材と圧入部材との間に介在する繊維強化樹脂の厚みによっては、樹脂の潰れや剥がれ等によって、圧入部材の保持力が安定しないことがある。   As in Patent Document 1, when the metal member is embedded in the opening, depending on the thickness of the fiber reinforced resin interposed between the metal member and the press-fitting member, the holding force of the press-fitting member may be reduced due to crushing or peeling of the resin. May not be stable.

本開示の一局面は、繊維強化樹脂を用いつつ、圧入部材の保持力の安定性を高めることができるサスペンションアームを提供することを目的としている。   An object of one aspect of the present disclosure is to provide a suspension arm that can increase the stability of the holding force of the press-fitting member while using a fiber reinforced resin.

本開示の一態様は、少なくとも１つの連結部を備える車両用のサスペンションアームである。少なくとも１つの連結部は、繊維強化樹脂製の基材と、金属製かつ筒状の補強部材と、圧入部材と、を有する。基材は、開口部を有する。補強部材は、基材における開口部の内周面よりも外側に少なくとも一部が埋め込まれる。圧入部材は、開口部に圧入される。開口部の内周面と補強部材の内周面との間に、繊維が存在する。   One aspect of the present disclosure is a vehicle suspension arm including at least one connecting portion. At least one connection part has a base material made from fiber reinforced resin, a metal and cylindrical reinforcement member, and a press-fit member. The substrate has an opening. The reinforcing member is at least partially embedded outside the inner peripheral surface of the opening in the base material. The press-fitting member is press-fitted into the opening. Fibers exist between the inner peripheral surface of the opening and the inner peripheral surface of the reinforcing member.

このような構成によれば、補強部材と圧入部材との間に繊維層が形成されることで、圧入強度の安定性が長期にわたって保証できる。その結果、圧入部材の保持力が安定的に確保できる。   According to such a configuration, the fiber layer is formed between the reinforcing member and the press-fitting member, so that the stability of the press-fit strength can be ensured for a long time. As a result, the holding force of the press-fitting member can be secured stably.

本開示の一態様では、補強部材の軸方向の少なくとも一方の端面は、少なくとも一部が基材に埋め込まれてもよい。このような構成によれば、補強部材が軸方向に抜け落ちることが抑制されるため、圧入部材の保持力の安定性をより高めることができる。   In one aspect of the present disclosure, at least one end face of the reinforcing member in the axial direction may be embedded in the base material. According to such a configuration, since the reinforcing member is suppressed from falling off in the axial direction, the stability of the holding force of the press-fitting member can be further improved.

本開示の別の態様は、少なくとも１つの連結部を備える車両用のサスペンションアームの製造方法である。サスペンションアームの製造方法は、繊維強化樹脂製の基材の開口部に圧入部材を圧入する工程を備える。基材には、開口部の内周面よりも外側に金属製かつ筒状の補強部材の少なくとの少なくとも一部が埋め込まれている。圧入後の補強部材の平均内径をＤ１、開口部の平均径をＤ２、圧入後の補強部材の内周面と開口部の内周面との平均距離をＴ１、圧入前の補強部材の平均内径をＤ３、圧入前の前記圧入部材の平均外径をＤ４、圧入前の補強部材の内周面と開口部の内周面との平均距離をＴ２としたとき、圧入する工程において、圧入前に下記式（２）が満たされると共に、圧入後に下記式（１）が満たされる。
Ｄ１≧Ｄ２＋２・Ｔ１ ・・・（１）
Ｄ３＜Ｄ４＋２・Ｔ２ ・・・（２） Another aspect of the present disclosure is a method for manufacturing a suspension arm for a vehicle including at least one connecting portion. The manufacturing method of a suspension arm includes a step of press-fitting a press-fitting member into an opening of a fiber reinforced resin base material. At least a part of a metallic and cylindrical reinforcing member is embedded in the base material outside the inner peripheral surface of the opening. The average inner diameter of the reinforcing member after press-fitting is D1, the average diameter of the opening is D2, the average distance between the inner peripheral surface of the reinforcing member after press-fitting and the inner peripheral surface of the opening is T1, and the average inner diameter of the reinforcing member before press-fitting D3, the average outer diameter of the press-fitting member before press-fitting is D4, and the average distance between the inner peripheral surface of the reinforcing member before press-fitting and the inner peripheral surface of the opening is T2, The following formula (2) is satisfied, and the following formula (1) is satisfied after press-fitting.
D1 ≧ D2 + 2 + T1 (1)
D3 <D4 + 2 · T2 (2)

このような構成によれば、補強部材と圧入部材との間に繊維層が形成されることで、圧入強度の安定性が長期にわたって保証できる。その結果、圧入部材の保持力が安定的に確保できる。   According to such a configuration, the fiber layer is formed between the reinforcing member and the press-fitting member, so that the stability of the press-fit strength can be ensured for a long time. As a result, the holding force of the press-fitting member can be secured stably.

図１は、実施形態におけるサスペンションアームの模式的な斜視図である。FIG. 1 is a schematic perspective view of a suspension arm in the embodiment. 図２は、図１のＩＩ−ＩＩ線での模式的な断面図である。FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 図３Ａ，３Ｂ，３Ｃは、図１のサスペンションアームの連結部における補強部材の模式的な斜視図である。3A, 3B, and 3C are schematic perspective views of the reinforcing member in the connection portion of the suspension arm of FIG. 図４は、図２の部分拡大断面図である。4 is a partially enlarged cross-sectional view of FIG. 図５は、圧入部材を圧入する前の図４に対応する模式的な部分拡大断面図である。FIG. 5 is a schematic partial enlarged cross-sectional view corresponding to FIG. 4 before press-fitting the press-fitting member. 図６は、図４とは異なる実施形態の連結部の図４に対応する模式的な部分拡大断面図である。FIG. 6 is a schematic partial enlarged cross-sectional view corresponding to FIG. 4 of the connecting portion of the embodiment different from FIG. 図７は、図１のサスペンションアームにおける圧入部材を圧入する前の連結部の模式的な斜視図である。FIG. 7 is a schematic perspective view of a connecting portion before press-fitting a press-fitting member in the suspension arm of FIG.

以下、本開示が適用された実施形態について、図面を用いて説明する。
［１．第１実施形態］
［１−１．構成］
図１に示すサスペンションアーム１は、サスペンションフレームの車体の幅方向外側に取り付けられ、車輪を懸架する構造部材である。なお、サスペンションフレームは、自動車の車体内で前後方向に延びる２つのサイドメンバに掛け渡されるように取り付けられる構造部材である。サスペンションアーム１は、トレーリングアームとも称される。 Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
A suspension arm 1 shown in FIG. 1 is a structural member that is attached to the outside of a suspension frame in the width direction of a vehicle body and suspends a wheel. The suspension frame is a structural member that is attached so as to be stretched over two side members that extend in the front-rear direction within the body of the automobile. The suspension arm 1 is also referred to as a trailing arm.

サスペンションアーム１は、３つの連結部２Ａ，２Ｂ，２Ｃを備える。３つの連結部２Ａ，２Ｂ，２Ｃは、それぞれ、サスペンションアーム１の異なる端部に設けられている。３つの連結部２Ａ，２Ｂ，２Ｃには、自動車のサスペンションを構成する構造部材がそれぞれ連結される。   The suspension arm 1 includes three connecting portions 2A, 2B, and 2C. The three connecting portions 2A, 2B, and 2C are provided at different ends of the suspension arm 1, respectively. The three connecting portions 2A, 2B, and 2C are connected to structural members that constitute an automobile suspension, respectively.

本実施形態では、サスペンションアーム１は、３つの連結部２Ａ，２Ｂ，２Ｃが３つの延伸部１Ａ，１Ｂ，１Ｃによって接続されている。サスペンションアーム１の中央部分には、３つの延伸部１Ａ，１Ｂ，１Ｃによって開口１Ｄが形成されている。   In the present embodiment, the suspension arm 1 has three connecting portions 2A, 2B, and 2C connected by three extending portions 1A, 1B, and 1C. In the central portion of the suspension arm 1, an opening 1D is formed by three extending portions 1A, 1B, 1C.

以下では、第１連結部２Ａについて説明する。第２連結部２Ｂ及び第３連結部２Ｃの構成は、サスペンションアーム１における位置を除いて、第１連結部２Ａと同様であるため、詳細な説明は省略する。   Below, 2A of 1st connection parts are demonstrated. Since the configurations of the second connecting portion 2B and the third connecting portion 2C are the same as those of the first connecting portion 2A except for the position in the suspension arm 1, detailed description thereof is omitted.

第１連結部２Ａは、図２に示すように、基材３と、補強部材４と、圧入部材５とを有する。補強部材４は、基材３に埋め込まれている。圧入部材５は、基材３の開口部６に圧入されている。   As shown in FIG. 2, the first connecting portion 2 </ b> A includes a base material 3, a reinforcing member 4, and a press-fitting member 5. The reinforcing member 4 is embedded in the base material 3. The press-fitting member 5 is press-fitted into the opening 6 of the base material 3.

＜基材＞
基材３は、繊維強化樹脂で形成されており、サスペンションアーム１の端部を構成する部位である。基材３は、本体部３Ａと、平坦部３Ｂと、延伸部３Ｃとを有する。 <Base material>
The base material 3 is made of fiber reinforced resin, and is a part constituting the end of the suspension arm 1. The base material 3 includes a main body portion 3A, a flat portion 3B, and an extending portion 3C.

本体部３Ａは、径が一定の開口部６を有する円筒体である。開口部６には、圧入部材５が圧入されている。つまり、開口部６の内周面６Ａは、圧入部材５の外周面５Ａと当接している。圧入部材５は、本体部３Ａの軸方向の第１端部（図２の上端部）から第２端部（図２の下端部）に向かって圧入される。   The main body 3A is a cylindrical body having an opening 6 having a constant diameter. A press-fitting member 5 is press-fitted into the opening 6. That is, the inner peripheral surface 6 </ b> A of the opening 6 is in contact with the outer peripheral surface 5 </ b> A of the press-fitting member 5. The press-fitting member 5 is press-fitted from the first end (the upper end in FIG. 2) in the axial direction of the main body 3A toward the second end (the lower end in FIG. 2).

平坦部３Ｂは、本体部３Ａの第１端部から径方向外側に延伸した平坦な板状の部位である。平坦部３Ｂの板面は、基材３の中心軸方向（つまり圧入部材５の圧入方向）に対して垂直である。平坦部３Ｂは、サスペンションアーム１の複数の連結部２Ａ，２Ｂ，２Ｃ同士を接続する骨格も構成している。   The flat portion 3B is a flat plate-like portion that extends radially outward from the first end of the main body portion 3A. The plate surface of the flat portion 3B is perpendicular to the central axis direction of the base material 3 (that is, the press-fitting direction of the press-fitting member 5). The flat portion 3B also constitutes a skeleton that connects the plurality of connecting portions 2A, 2B, 2C of the suspension arm 1.

延伸部３Ｃは、平坦部３Ｂにおける本体部３Ａとは反対側の端部から、圧入部材５の圧入方向に延伸する板状の部位である。延伸部３Ｃは、サスペンションアーム１の側壁も構成している。   The extending portion 3C is a plate-like portion extending in the press-fitting direction of the press-fitting member 5 from the end portion of the flat portion 3B opposite to the main body portion 3A. The extending portion 3 </ b> C also constitutes a side wall of the suspension arm 1.

基材３を構成する繊維強化樹脂（ＦＲＰ）は、マトリックス樹脂と、マトリックス樹脂中に保持された繊維とを含む。基材３は、一定の長さの繊維（いわゆる強化繊維）にマトリックス樹脂を含浸させた繊維強化樹脂シートの成形によって得られる。   The fiber reinforced resin (FRP) constituting the substrate 3 includes a matrix resin and fibers held in the matrix resin. The base material 3 is obtained by molding a fiber reinforced resin sheet obtained by impregnating a matrix resin into fibers of a certain length (so-called reinforcing fibers).

マトリックス樹脂としては、熱硬化性樹脂又は熱可塑性樹脂が使用される。
熱硬化性樹脂としては、エポキシ、不飽和ポリエステル、ビニルエステル、フェノール樹脂、ポリウレタン、シリコン等が挙げられる。 As the matrix resin, a thermosetting resin or a thermoplastic resin is used.
Examples of the thermosetting resin include epoxy, unsaturated polyester, vinyl ester, phenol resin, polyurethane, and silicon.

熱可塑性樹脂としては、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ＡＢＳ樹脂、ポリスチレン、ＡＳ樹脂、ポリアミド、ポリアセタール、ポリカーボネート、熱可塑性ポリエステル、ポリフェニレンサルファイド、フッ素樹脂、ポリエーテルイミド、ポリエーテルケトン、ポリイミド等が挙げられる。   Examples of the thermoplastic resin include polyethylene, polypropylene, polyvinyl chloride, ABS resin, polystyrene, AS resin, polyamide, polyacetal, polycarbonate, thermoplastic polyester, polyphenylene sulfide, fluororesin, polyetherimide, polyetherketone, and polyimide. It is done.

基材３を構成する繊維としては、例えば、炭素繊維、ガラス繊維、樹脂繊維等が挙げられる。この中でも炭素繊維が好ましい。また、基材３は、複数種の繊維を含んでいてもよい。   As a fiber which comprises the base material 3, carbon fiber, glass fiber, resin fiber etc. are mentioned, for example. Among these, carbon fiber is preferable. Moreover, the base material 3 may contain multiple types of fiber.

＜補強部材＞
補強部材４は、図２に示すように、金属で形成された円筒状の部材である。補強部材４は、筒状部４Ａと、鍔部４Ｂとを有する。 <Reinforcing member>
As shown in FIG. 2, the reinforcing member 4 is a cylindrical member made of metal. The reinforcing member 4 has a cylindrical portion 4A and a flange portion 4B.

筒状部４Ａは、内径及び外径が一定の円筒体である。筒状部４Ａは、基材３の本体部３Ａにおける開口部６の内周面６Ａよりも外側に、径方向内側の一部が埋め込まれている。また、筒状部４Ａは、本体部３Ａと同軸に配置されている。   The cylindrical portion 4A is a cylindrical body having a constant inner diameter and outer diameter. The cylindrical portion 4 </ b> A is partly embedded in the radial direction outside the inner peripheral surface 6 </ b> A of the opening 6 in the main body 3 </ b> A of the base 3. Further, the cylindrical portion 4A is arranged coaxially with the main body portion 3A.

つまり、筒状部４Ａの内周面４Ｃは、開口部６の内周面６Ａから径方向外側に一定距離離間した位置に配置され、基材３の本体部３Ａ内に埋設されている。そのため、筒状部４Ａの内周面４Ｃは開口部６内に露出せず、圧入部材５と当接していない。   That is, the inner peripheral surface 4 </ b> C of the cylindrical portion 4 </ b> A is disposed at a position spaced apart from the inner peripheral surface 6 </ b> A of the opening 6 by a certain distance outward in the radial direction, and is embedded in the main body 3 </ b> A of the base material 3. Therefore, the inner peripheral surface 4 </ b> C of the cylindrical portion 4 </ b> A is not exposed in the opening 6 and is not in contact with the press-fitting member 5.

また、筒状部４Ａの軸方向の第２端部（図２の下端部）は、端面４Ｄの一部（つまり径方向の内側の部分）が本体部３Ａに埋め込まれている。換言すれば、基材３の本体部３Ａの第２端部は、筒状部４Ａの第２端部よりも軸方向外側に延伸している。   Further, a second end portion (lower end portion in FIG. 2) in the axial direction of the cylindrical portion 4A has a part of the end surface 4D (that is, a radially inner portion) embedded in the main body portion 3A. In other words, the second end portion of the main body portion 3A of the base material 3 extends outward in the axial direction from the second end portion of the cylindrical portion 4A.

鍔部４Ｂは、筒状部４Ａの軸方向の第１端部（図２の上端部）から径方向外側に延伸した円環状の部位である。鍔部４Ｂは、基材３の平坦部３Ｂと平行に延伸しており、平坦部３Ｂに厚み方向の一部が埋め込まれている。   The flange portion 4B is an annular portion extending radially outward from the first end portion (upper end portion in FIG. 2) of the cylindrical portion 4A in the axial direction. The eaves part 4B extends in parallel with the flat part 3B of the base material 3, and a part in the thickness direction is embedded in the flat part 3B.

具体的には、鍔部４Ｂは、平坦部３Ｂにおける本体部３Ａと延伸部３Ｃとに挟まれた側に埋め込まれている。また、鍔部４Ｂの筒状部４Ａとは反対側の端面４Ｅは、厚み方向において筒状部４Ａから遠い部分が平坦部３Ｂに埋め込まれている。   Specifically, the flange portion 4B is embedded on the side of the flat portion 3B sandwiched between the main body portion 3A and the extending portion 3C. Further, the end surface 4E of the flange portion 4B opposite to the cylindrical portion 4A is embedded in the flat portion 3B at a portion far from the cylindrical portion 4A in the thickness direction.

補強部材４は、図３Ａに示すように、筒状部４Ａを径方向に貫通する複数の貫通孔１４Ａをさらに有してもよい。また、補強部材４は、筒状部４Ａの内周面から径方向内側に突出する複数の凸条１４Ｂ（図３Ｂ参照）、又は内周面において径方向外側に凹む複数の溝１４Ｃ（図３Ｃ参照）をさらに有してもよい。複数の凸条１４Ｂ及び複数の溝１４Ｃは、それぞれ、筒状部４Ａの周方向に沿って環状に形成されている。   As shown in FIG. 3A, the reinforcing member 4 may further include a plurality of through holes 14A that penetrate the cylindrical portion 4A in the radial direction. The reinforcing member 4 includes a plurality of protrusions 14B (see FIG. 3B) protruding radially inward from the inner peripheral surface of the cylindrical portion 4A, or a plurality of grooves 14C (FIG. 3C) recessed radially outward on the inner peripheral surface. Reference). The plurality of ridges 14B and the plurality of grooves 14C are each formed in an annular shape along the circumferential direction of the cylindrical portion 4A.

複数の貫通孔１４Ａ、複数の凸条１４Ｂ、複数の溝１４Ｃ又はこれらの組み合わせを補強部材４が有することによって、補強部材４と基材３との接合面積が増え、両者間の接合強度を高めることができる。   When the reinforcing member 4 includes the plurality of through holes 14A, the plurality of protrusions 14B, the plurality of grooves 14C, or a combination thereof, the bonding area between the reinforcing member 4 and the base material 3 is increased, and the bonding strength between the two is increased. be able to.

補強部材４を構成する金属としては、例えば、鉄、アルミニウム、ステンレス鋼、鋳鉄、チタン、チタン合金等が挙げられる。補強部材４は、例えば、基材３のプレス成型時に基材３内に埋め込まれる。また、補強部材４は、防錆を目的とした表面処理が施されてもよい。   Examples of the metal constituting the reinforcing member 4 include iron, aluminum, stainless steel, cast iron, titanium, and a titanium alloy. The reinforcing member 4 is embedded in the base material 3 when the base material 3 is press-molded, for example. Further, the reinforcing member 4 may be subjected to a surface treatment for the purpose of rust prevention.

＜圧入部材＞
圧入部材５は、図２に示すように、開口部６に圧入されている。圧入部材５としては、例えば、カラー、ブッシュ、ボールジョイント等の、繰り返し荷重や振動が負荷される部材が挙げられる。 <Press-fit member>
The press-fitting member 5 is press-fitted into the opening 6 as shown in FIG. Examples of the press-fitting member 5 include members that are subjected to repeated loads and vibrations, such as collars, bushes, and ball joints.

圧入部材５の外周面５Ａの材質としては、金属、樹脂等が挙げられる。   Examples of the material of the outer peripheral surface 5A of the press-fitting member 5 include metals and resins.

＜基材と補強部材との関係＞
サスペンションアーム１では、図４に示すように、補強部材４の平均内径をＤ１、開口部６の平均径をＤ２、補強部材４の内周面４Ｃと開口部６の内周面６Ａとの平均距離をＴ１としたとき、下記式（１）が成り立つ。
Ｄ１≧Ｄ２＋２・Ｔ１ ・・・（１） <Relationship between base material and reinforcing member>
In the suspension arm 1, as shown in FIG. 4, the average inner diameter of the reinforcing member 4 is D1, the average diameter of the opening 6 is D2, and the average of the inner peripheral surface 4C of the reinforcing member 4 and the inner peripheral surface 6A of the opening 6 is as follows. When the distance is T1, the following formula (1) is established.
D1 ≧ D2 + 2 + T1 (1)

そのため、開口部６の内周面６Ａ（つまり圧入部材５の外周面５Ａ）と、補強部材４（つまり筒状部４Ａ）の内周面４Ｃとの開口部６の径方向における平均距離は、繊維３Ｆの平均径以上である。なお、補強部材４の平均内径Ｄ１は、基材３の本体部３Ａの外径未満である。   Therefore, the average distance in the radial direction of the opening 6 between the inner peripheral surface 6A of the opening 6 (that is, the outer peripheral surface 5A of the press-fitting member 5) and the inner peripheral surface 4C of the reinforcing member 4 (that is, the cylindrical portion 4A) is It is more than the average diameter of the fiber 3F. The average inner diameter D1 of the reinforcing member 4 is less than the outer diameter of the main body 3A of the base material 3.

本実施形態では、厚み方向に２列の繊維３Ｆを配置した繊維強化樹脂シートを用いて基材３を形成している。そのため、基材３は本体部３Ａの端部から延伸部３Ｃの端部まで、略一様に２列の連続した繊維３Ｆが配置されている。また、本体部３Ａのうち、補強部材４が埋め込まれている部分では、他の部分よりも径方向内側に繊維３Ｆの列が補強部材４によってシフトされている。   In this embodiment, the base material 3 is formed using the fiber reinforced resin sheet which has arrange | positioned the fiber 3F of 2 rows in the thickness direction. Therefore, the base material 3 has two rows of continuous fibers 3F arranged substantially uniformly from the end of the main body 3A to the end of the extending portion 3C. In the portion of the main body 3 </ b> A where the reinforcing member 4 is embedded, the row of fibers 3 </ b> F is shifted by the reinforcing member 4 on the radially inner side of the other portions.

そのため、開口部６と補強部材４との間には、少なくとも１列（図４では２列）の繊維３Ｆが配置されている。各繊維３Ｆは、補強部材４の周方向に沿って延伸しており、補強部材４によって切断されていない。   Therefore, at least one row (two rows in FIG. 4) of fibers 3F is arranged between the opening 6 and the reinforcing member 4. Each fiber 3F extends along the circumferential direction of the reinforcing member 4 and is not cut by the reinforcing member 4.

なお、開口部６の開口形状は、真円に限らず、楕円や多角形であってもよい。つまり、基材３の本体部３Ａ及び補強部材４は、楕円筒や角筒であってもよいし、圧入部材５の外形は、楕円や多角形であってもよい。   The opening shape of the opening 6 is not limited to a perfect circle and may be an ellipse or a polygon. That is, the main body 3A and the reinforcing member 4 of the base material 3 may be an elliptic cylinder or a rectangular cylinder, and the outer shape of the press-fitting member 5 may be an ellipse or a polygon.

開口部６の開口形状が真円でない場合、開口部６の平均径Ｄ２は、開口部６の断面積Ｓと等面積の真円の径（つまり真円換算径Ｄ＝（Ｓ／π）１／２×２）を軸方向に平均したものを意味する。補強部材４が円筒でない場合の補強部材４の平均径Ｄ１は、同様に、真円換算径を平均したものを意味する。 When the opening shape of the opening 6 is not a perfect circle, the average diameter D2 of the opening 6 is a diameter of a perfect circle having the same area as the cross-sectional area S of the opening 6 (that is, a perfect circle equivalent diameter D = (S / π) 1. / 2 × 2) is averaged in the axial direction. Similarly, the average diameter D1 of the reinforcing member 4 when the reinforcing member 4 is not a cylinder means an average of the true circle equivalent diameter.

［１−２．製造方法］
次に、サスペンションアーム１の製造方法について説明する。
サスペンションアーム１の製造方法は、複数の連結部２Ａ，２Ｂ，２Ｃそれぞれの開口部６に圧入部材５を圧入する工程を備える。 [1-2. Production method]
Next, a method for manufacturing the suspension arm 1 will be described.
The manufacturing method of the suspension arm 1 includes a step of press-fitting the press-fitting member 5 into the openings 6 of the plurality of connecting portions 2A, 2B, 2C.

圧入工程では、図５に示すように、補強部材４が埋め込まれた基材３に対し、圧入部材５を圧入する。圧入部材５の圧入前の状態において、補強部材４の平均内径をＤ３、圧入部材５の平均外径をＤ４、補強部材４の内周面４Ｃと開口部６の内周面６Ａとの平均距離をＴ２としたとき、下記式（２）が成り立つ。
Ｄ３＜Ｄ４＋２・Ｔ２ ・・・（２） In the press-fitting process, as shown in FIG. 5, the press-fitting member 5 is press-fitted into the base material 3 in which the reinforcing member 4 is embedded. In the state before the press-fitting member 5 is press-fitted, the average inner diameter of the reinforcing member 4 is D3, the average outer diameter of the press-fitting member 5 is D4, and the average distance between the inner peripheral surface 4C of the reinforcing member 4 and the inner peripheral surface 6A of the opening 6 When T2 is T2, the following equation (2) is established.
D3 <D4 + 2 · T2 (2)

つまり、補強部材４の平均内径Ｄ３は、圧入部材５の平均外径Ｄ４に補強部材４と開口部６との間に存在する繊維３Ｆの層の厚み（つまり並列した繊維３Ｆの径の総計）を加えた値よりも小さくされる。換言すれば、圧入部材５の平均外径Ｄ４は、補強部材４の平均内径Ｄ３から繊維３Ｆの層の厚みを差し引いた値よりも大きくされる。   That is, the average inner diameter D3 of the reinforcing member 4 is the thickness of the fiber 3F layer existing between the reinforcing member 4 and the opening 6 on the average outer diameter D4 of the press-fitting member 5 (that is, the total diameter of the parallel fibers 3F). It is made smaller than the value obtained by adding. In other words, the average outer diameter D4 of the press-fitting member 5 is made larger than the value obtained by subtracting the thickness of the fiber 3F layer from the average inner diameter D3 of the reinforcing member 4.

また、Ｔ１＜Ｔ２である。つまり、繊維層は圧入部材５の圧入によって圧縮される。なお、圧入前の補強部材４の平均内径Ｄ３は、圧入後の補強部材４の平均内径Ｄ１とは必ずしも一致しない。   Further, T1 <T2. That is, the fiber layer is compressed by the press-fitting of the press-fitting member 5. The average inner diameter D3 of the reinforcing member 4 before press-fitting does not necessarily match the average inner diameter D1 of the reinforcing member 4 after press-fitting.

［１−３．効果］
以上詳述した実施形態によれば、以下の効果が得られる。
（１ａ）上記式（１）と式（２）とを満たすことによって、補強部材４と圧入部材５との間に繊維層が形成され、圧入強度の安定性が長期にわたって保証できる。その結果、圧入部材の保持力が安定的に確保できる。 [1-3. effect]
According to the embodiment detailed above, the following effects can be obtained.
(1a) By satisfy | filling said Formula (1) and Formula (2), a fiber layer is formed between the reinforcement member 4 and the press-fit member 5, and stability of press-fit strength can be guaranteed over a long period of time. As a result, the holding force of the press-fitting member can be secured stably.

（１ｂ）補強部材４の軸方向の少なくとも一方の端面４Ｄの一部が基材３に埋め込まれているので、補強部材４が軸方向に抜け落ちることが抑制される。その結果、圧入部材５の保持力の安定性をより高めることができる。   (1b) Since at least one end face 4D in the axial direction of the reinforcing member 4 is partially embedded in the base material 3, the reinforcing member 4 is prevented from falling off in the axial direction. As a result, the stability of the holding force of the press-fitting member 5 can be further increased.

［２．他の実施形態］
以上、本開示の実施形態について説明したが、本開示は、上記実施形態に限定されることなく、種々の形態を採り得ることは言うまでもない。 [2. Other Embodiments]
As mentioned above, although embodiment of this indication was described, it cannot be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.

（２ａ）開口部６の内周面６Ａと補強部材４の内周面４Ｃとの間に存在する繊維３Ｆは、必ずしも開口部６の周方向に沿って延伸していなくてもよい。繊維３Ｆは、例えば、径方向や軸方向に沿って延伸していてもよい。   (2a) The fibers 3 </ b> F existing between the inner peripheral surface 6 </ b> A of the opening 6 and the inner peripheral surface 4 </ b> C of the reinforcing member 4 do not necessarily have to extend along the circumferential direction of the opening 6. The fiber 3F may be stretched along the radial direction or the axial direction, for example.

（２ｂ）上記実施形態のサスペンションアーム１において、補強部材４の軸方向の少なくとも一方の端面４Ｄは、必ずしも基材３に埋め込まれなくてもよい。つまり、補強部材４の軸方向の端面４Ｄが、基材３の軸方向外側に突出していてもよい。   (2b) In the suspension arm 1 of the above embodiment, at least one end surface 4D in the axial direction of the reinforcing member 4 does not necessarily need to be embedded in the base material 3. That is, the end surface 4 </ b> D in the axial direction of the reinforcing member 4 may protrude outward in the axial direction of the base material 3.

（２ｃ）上記実施形態のサスペンションアーム１において、図６に示すように、補強部材４は、その全体が基材３に埋め込まれてもよい。図６の連結部２Ａでは、補強部材４の筒状部４Ａの全体が基材３の本体部３Ａに埋め込まれ、鍔部４Ｂの全体が基材３の平坦部３Ｂに埋め込まれている。また、補強部材４の軸方向の端面４Ｄも全体が基材３に埋め込まれている。   (2c) In the suspension arm 1 of the above embodiment, as shown in FIG. 6, the entire reinforcing member 4 may be embedded in the base material 3. In the connecting portion 2 </ b> A of FIG. 6, the entire cylindrical portion 4 </ b> A of the reinforcing member 4 is embedded in the main body portion 3 </ b> A of the base material 3, and the entire flange portion 4 </ b> B is embedded in the flat portion 3 </ b> B of the base material 3. Further, the entire end face 4 </ b> D in the axial direction of the reinforcing member 4 is embedded in the base material 3.

図６の連結部２Ａでは、図７に示すように、本体部３Ａの第２端部には、第１端部に向かって凹んだ切欠き３Ｄを形成するとよい。切欠き３Ｄにおいて補強部材４の端面４Ｄを露出させることで、補強部材４の基材３に対する位置決めを容易に行うことができる。   In the connecting portion 2A of FIG. 6, as shown in FIG. 7, a notch 3D that is recessed toward the first end portion may be formed in the second end portion of the main body portion 3A. By exposing the end face 4D of the reinforcing member 4 in the notch 3D, the reinforcing member 4 can be easily positioned with respect to the base material 3.

（２ｄ）上記実施形態における１つの構成要素が有する機能を複数の構成要素として分散させたり、複数の構成要素が有する機能を１つの構成要素に統合したりしてもよい。また、上記実施形態の構成の一部を省略してもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加、置換等してもよい。なお、特許請求の範囲に記載の文言から特定される技術思想に含まれるあらゆる態様が本開示の実施形態である。   (2d) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

１…サスペンションアーム、１Ａ，１Ｂ，１Ｃ…延伸部、１Ｄ…開口、
２Ａ，２Ｂ，２Ｃ…連結部、３…基材、３Ａ…本体部、３Ｂ…平坦部、３Ｃ…延伸部、
３Ｄ…切欠き、３Ｆ…繊維、４…補強部材、４Ａ…筒状部、４Ｂ…鍔部、
４Ｃ…内周面、４Ｄ，４Ｅ…端面、５…圧入部材、５Ａ…外周面、６…開口部、
６Ａ…内周面、１４Ａ…貫通孔、１４Ｂ…凸条、１４Ｃ…溝。 DESCRIPTION OF SYMBOLS 1 ... Suspension arm, 1A, 1B, 1C ... Extension part, 1D ... Opening,
2A, 2B, 2C ... connecting part, 3 ... base material, 3A ... main body part, 3B ... flat part, 3C ... extending part,
3D ... Notch, 3F ... Fiber, 4 ... Reinforcement member, 4A ... Cylindrical part, 4B ... Gutter part,
4C ... inner peripheral surface, 4D, 4E ... end face, 5 ... press-fitting member, 5A ... outer peripheral surface, 6 ... opening,
6A ... inner peripheral surface, 14A ... through-hole, 14B ... ridge, 14C ... groove.

Claims (3)

少なくとも１つの連結部を備える車両用のサスペンションアームであって、
前記少なくとも１つの連結部は、
開口部を有する繊維強化樹脂製の基材と、
前記基材における前記開口部の内周面よりも外側に少なくとも一部が埋め込まれた金属製かつ筒状の補強部材と、
前記開口部に圧入された圧入部材と、
を有し、
前記開口部の内周面と前記補強部材の内周面との間に、前記繊維が存在する、サスペンションアーム。 A suspension arm for a vehicle including at least one connecting portion,
The at least one connecting portion includes:
A substrate made of fiber reinforced resin having an opening, and
A metallic and tubular reinforcing member at least partially embedded outside the inner peripheral surface of the opening in the base material;
A press-fitting member press-fitted into the opening;
Have
A suspension arm in which the fibers are present between an inner peripheral surface of the opening and an inner peripheral surface of the reinforcing member. 請求項１に記載のサスペンションアームであって、
前記補強部材の軸方向の少なくとも一方の端面は、少なくとも一部が前記基材に埋め込まれる、サスペンションアーム。 The suspension arm according to claim 1,
A suspension arm in which at least a part of at least one end face in the axial direction of the reinforcing member is embedded in the base material. 少なくとも１つの連結部を備える車両用のサスペンションアームの製造方法であって、
繊維強化樹脂製の基材の開口部に圧入部材を圧入する工程を備え、
前記基材には、前記開口部の内周面よりも外側に金属製かつ筒状の補強部材の少なくとの少なくとも一部が埋め込まれており、
圧入後の前記補強部材の平均内径をＤ１、前記開口部の平均径をＤ２、圧入後の前記補強部材の内周面と前記開口部の内周面との平均距離をＴ１、圧入前の前記補強部材の平均内径をＤ３、圧入前の前記圧入部材の平均外径をＤ４、圧入前の前記補強部材の内周面と前記開口部の内周面との平均距離をＴ２としたとき、前記圧入する工程において、圧入前に下記式（２）が満たされると共に、圧入後に下記式（１）が満たされる、サスペンションアームの製造方法。
Ｄ１≧Ｄ２＋２・Ｔ１ ・・・（１）
Ｄ３＜Ｄ４＋２・Ｔ２ ・・・（２） A method for manufacturing a suspension arm for a vehicle including at least one connecting portion,
Comprising a step of press-fitting a press-fitting member into an opening of a fiber reinforced resin base material;
In the base material, at least a part of at least a metallic and cylindrical reinforcing member is embedded outside the inner peripheral surface of the opening,
The average inner diameter of the reinforcing member after press-fitting is D1, the average diameter of the opening is D2, the average distance between the inner peripheral surface of the reinforcing member after press-fitting and the inner peripheral surface of the opening is T1, and the above-mentioned before press-fitting When the average inner diameter of the reinforcing member is D3, the average outer diameter of the press-fitting member before press-fitting is D4, and the average distance between the inner peripheral surface of the reinforcing member and the inner peripheral surface of the opening before press-fitting is T2, In the press-fitting step, the following formula (2) is satisfied before press-fitting, and the following formula (1) is satisfied after press-fitting.
D1 ≧ D2 + 2 + T1 (1)
D3 <D4 + 2 · T2 (2)
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JP2017132310A (en) * 2016-01-26 2017-08-03 株式会社Ｓｕｂａｒｕ Composite structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022270188A1 (en) * 2021-06-22 2022-12-29 日本製鉄株式会社 Structure component

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