JP7784337B2 - Suspension arm and method for manufacturing the suspension arm - Google Patents
Suspension arm and method for manufacturing the suspension armInfo
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- JP7784337B2 JP7784337B2 JP2022050283A JP2022050283A JP7784337B2 JP 7784337 B2 JP7784337 B2 JP 7784337B2 JP 2022050283 A JP2022050283 A JP 2022050283A JP 2022050283 A JP2022050283 A JP 2022050283A JP 7784337 B2 JP7784337 B2 JP 7784337B2
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- suspension arm
- molten metal
- metal flow
- cylindrical portion
- flow direction
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Description
本発明は、車両のサスペンションの一部を構成するサスペンションアーム、及びその製造方法に関する。 The present invention relates to a suspension arm that forms part of a vehicle suspension, and a method for manufacturing the same.
従来、スプリングとスプリング座の間にはスプリングシートが配置され、スプリングシートを保持するために、スプリング座より上方に臨むように突出した円筒部がサスペンションアームに形成されている（特許文献１：特開２００８－０１８７８４号公報）。 Conventionally, a spring seat is placed between the spring and the spring seat, and a cylindrical portion protruding above the spring seat is formed on the suspension arm to hold the spring seat (Patent Document 1: JP 2008-018784 A).
しかし、鋳造によってサスペンションアームを成形する際に、円筒部の湯回り不足が生じるという問題があった。 However, when forming the suspension arm by casting, there was an issue of insufficient molten metal flow in the cylindrical part.
本発明は、上記事情に鑑みてなされ、湯回り性を改善できるサスペンションアームを提供することを目的とする。 The present invention was made in consideration of the above circumstances, and aims to provide a suspension arm that can improve molten metal running performance.
一実施形態として、以下に開示するような解決手段により、前記課題を解決する。 In one embodiment, the above problem is solved by the solution disclosed below.
本発明に係るサスペンションアームは、スプリングの荷重を受ける受座と、前記受座から突出する円筒部とを備え、鋳造により成形されるサスペンションアームであって、鋳造する際の湯流れ方向の上流側を前記円筒部における第１部位とし下流側を前記円筒部における第２部位として前記第１部位と前記第２部位とが前記円筒部の中心を通る短手方向の仮想線にて分けたものであり、前記第１部位の体積を前記第２部位の体積よりも大きく形成した構成、および／または、前記第１部位の高さを前記第２部位の高さよりも大きく形成した構成であることを特徴とする。 The suspension arm of the present invention is a suspension arm formed by casting, comprising a seat that receives the load of a spring and a cylindrical portion that protrudes from the seat, wherein the upstream side of the direction of molten metal flow during casting is a first portion of the cylindrical portion and the downstream side is a second portion of the cylindrical portion, the first portion and the second portion being separated by a virtual line in the short direction that passes through the center of the cylindrical portion , and wherein the volume of the first portion is formed to be larger than the volume of the second portion, and/or the height of the first portion is formed to be larger than the height of the second portion.
この構成によれば、第１部位と第２部位の体積の関係、および／または、前記第１部位の高さと前記第２部位の高さの関係を、第１部位＞第２部位とし、湯流れ方向の上流側に第１部位を配置することにより、湯回り性を改善できる。 With this configuration, the relationship between the volumes of the first and second regions and/or the relationship between the heights of the first and second regions is such that the first region is greater than the second region, and by positioning the first region upstream in the direction of molten metal flow, the running of molten metal can be improved.
前記円筒部は、前記湯流れ方向の上流側の端部から前記湯流れ方向の下流側の端部に向かって傾斜していることが好ましい。この構成により、湯回り性がより円滑になる。一例として、前記円筒部は、前記湯流れ方向の上流側の端部から前記湯流れ方向の下流側の端部に向かって段差が形成されている構成としてもよい。 It is preferable that the cylindrical portion be inclined from the upstream end in the molten metal flow direction toward the downstream end in the molten metal flow direction. This configuration allows for smoother molten metal flow. As an example, the cylindrical portion may be configured such that a step is formed from the upstream end in the molten metal flow direction toward the downstream end in the molten metal flow direction.
一例として、前記サスペンションアームは、アルミニウムまたはアルミニウム合金の鋳造によって形成される。これにより、剛性を向上させるとともに、より軽量化を図ることが出来る。 As an example, the suspension arm is formed by casting aluminum or an aluminum alloy. This improves rigidity and reduces weight.
本発明に係るサスペンションアームの製造方法は、スプリングの荷重を受ける受座と、前記受座から突出する円筒部とを備え、鋳造により成形されるサスペンションアームの製造方法であって、鋳造する際の湯流れ方向の上流側を前記円筒部における第１部位とし下流側を前記円筒部における第２部位として前記第１部位と前記第２部位とが前記円筒部の中心を通る短手方向の仮想線にて分けたものであり、前記第１部位の体積を前記第２部位の体積よりも大きく形成すること、および／または、前記第１部位の高さを前記第２部位の高さよりも大きく形成することを特徴とする。 The method for manufacturing a suspension arm according to the present invention is a method for manufacturing a suspension arm formed by casting, which includes a seat that receives the load of a spring and a cylindrical portion that protrudes from the seat, wherein the upstream side of the direction of molten metal flow during casting is a first portion of the cylindrical portion and the downstream side is a second portion of the cylindrical portion, and the first portion and the second portion are separated by a virtual line in the short direction that passes through the center of the cylindrical portion , and the volume of the first portion is formed to be larger than the volume of the second portion, and/or the height of the first portion is formed to be larger than the height of the second portion.
この製造方法によれば第１部位と第２部位の体積の関係、および／または、前記第１部位の高さと前記第２部位の高さの関係を、第１部位＞第２部位とし、湯流れ方向の上流側に第１部位を配置することにより、湯回り性を改善できる。 This manufacturing method improves molten metal running by making the relationship between the volumes of the first and second regions and/or the relationship between the heights of the first and second regions such that the first region is greater than the second region, and by positioning the first region upstream in the direction of molten metal flow.
開示のサスペンションアームによれば、湯回り性を改善できる。 The disclosed suspension arm can improve molten metal running performance.
以下、図面を参照して、本発明の実施形態について詳しく説明する。図１は本実施形態のサスペンションアーム１の例を示す概略の斜視図であり、図２はその平面図であり、図３はその縦断面図である。サスペンションアーム１は、車両におけるサスペンションの構成要素の一部をなす。なお、実施形態を説明するための全図において、同一の機能を有する部材には同一の符号を付し、その繰り返しの説明は省略する場合がある。 Embodiments of the present invention will now be described in detail with reference to the drawings. Figure 1 is a schematic perspective view showing an example of a suspension arm 1 according to this embodiment, Figure 2 is a plan view thereof, and Figure 3 is a longitudinal cross-sectional view thereof. The suspension arm 1 forms part of the components of a vehicle suspension. Note that in all drawings used to explain the embodiments, components having the same function are given the same reference numerals, and repeated explanations may be omitted.
本実施形態のサスペンションアーム１は、一例として、アルミニウムまたはアルミニウム合金からなり、重力鋳造法等によって形成される。図１と図２に示すように、サスペンションアーム１の一端側は、車体側取付部５が形成されている。車体側取付部５は、貫通穴５ａを有しており、車体側支持部に支軸を介して回動自在に取り付けられる構成である。また、サスペンションアーム１の他端側は、クッション連結部４が形成されている。クッション連結部４は、二股状になっており、サスペンションアーム１および車体間に設けられるクッションの下端部が連結軸を介して連結される構成である。 The suspension arm 1 of this embodiment is made of, for example, aluminum or an aluminum alloy and is formed by gravity casting or the like. As shown in Figures 1 and 2, one end of the suspension arm 1 is formed with a vehicle body mounting portion 5. The vehicle body mounting portion 5 has a through hole 5a and is configured to be rotatably mounted to a vehicle body support portion via a support shaft. The other end of the suspension arm 1 is formed with a cushion connecting portion 4. The cushion connecting portion 4 is bifurcated, and is configured to connect the lower end of a cushion provided between the suspension arm 1 and the vehicle body via a connecting shaft.
サスペンションアーム１は、長手方向の中間部が幅広に形成されており、この中間部に凹設された皿状の受座２と、受座２から上方に突出する円筒部３とを有する。受座２は、合成樹脂製あるいはゴム製の緩衝部材（図示せず）を介して、コイル状のスプリングＣ１の荷重を受ける構成である。円筒部３は、スプリングＣ１の下端部内に入り込み、スプリングＣ１が位置ずれを防止する構成である。スプリングＣ１の上端部は、車体側スプリング保持部に緩衝部材を介して受けられる（図示せず）。 The suspension arm 1 has a wide longitudinal middle section, a dish-shaped seat 2 recessed in this middle section, and a cylindrical section 3 protruding upward from the seat 2. The seat 2 is configured to support the load of the coil spring C1 via a shock absorber (not shown) made of synthetic resin or rubber. The cylindrical section 3 fits into the lower end of the spring C1, preventing the spring C1 from shifting position. The upper end of the spring C1 is supported by a spring holder on the vehicle body side via a shock absorber (not shown).
サスペンションアーム１を鋳造する際の湯口（図示せず）は、クッション連結部４の近傍に設けられる。クッション連結部４は、矢印で示す湯流れ方向Ｆ１の上流側に位置しており、車体側取付部５は湯流れ方向Ｆ１の下流側に位置している。サスペンションアーム１を鋳造する際は、下流側から上流側に順に凝固する。 The pouring gate (not shown) used when casting the suspension arm 1 is located near the cushion connecting portion 4. The cushion connecting portion 4 is located upstream of the molten metal flow direction F1 indicated by the arrow, and the vehicle body mounting portion 5 is located downstream of the molten metal flow direction F1. When the suspension arm 1 is cast, solidification occurs in order from downstream to upstream.
円筒部３は、円筒部３の中心を通る短手方向の仮想線Ｋ１にて分けた際の一方側を第１部位３ａとし他方側を第２部位３ｂとしたとき、第１部位３ａの体積が、第２部位３ｂの体積よりも大きく形成される。この構成によれば、第１部位３ａと第２部位３ｂの体積の関係を、第１部位３ａ＞第２部位３ｂとし、湯流れ方向Ｆ１の上流側に第１部位３ａを配置することにより、湯回り性を改善できる。 When the cylindrical portion 3 is divided by an imaginary line K1 in the short direction passing through the center of the cylindrical portion 3, one side is the first portion 3a and the other side is the second portion 3b, with the volume of the first portion 3a being larger than the volume of the second portion 3b. With this configuration, the volume relationship between the first portion 3a and the second portion 3b is first portion 3a > second portion 3b, and by positioning the first portion 3a upstream in the molten metal flow direction F1, molten metal running can be improved.
円筒部３は、円筒部３の中心を通る短手方向の仮想線Ｋ１にて分けた際の一方側を第１部位３ａとし他方側を第２部位３ｂとしたとき、第１部位３ａの高さＨ１が、第２部位３ｂの高さＨ２よりも大きく形成される。この構成によれば、第１部位３ａと第２部位３ｂの高さの関係を、第１部位３ａ＞第２部位３ｂとし、湯流れ方向Ｆ１の上流側に第１部位３ａを配置することにより、湯回り性を改善できる。 When the cylindrical portion 3 is divided by an imaginary line K1 in the short direction passing through the center of the cylindrical portion 3, one side is the first portion 3a and the other side is the second portion 3b, with the height H1 of the first portion 3a being greater than the height H2 of the second portion 3b. With this configuration, the height relationship between the first portion 3a and the second portion 3b is first portion 3a > second portion 3b, and by positioning the first portion 3a upstream in the molten metal flow direction F1, molten metal running can be improved.
円筒部３は、湯流れ方向Ｆ１の上流側の端部から前記湯流れ方向Ｆ１の下流側の端部に向かって傾斜している。この構成により、湯回り性がより円滑になるとともにガス抜き性も改善できる。 The cylindrical portion 3 is inclined from the upstream end in the molten metal flow direction F1 to the downstream end in the molten metal flow direction F1. This configuration allows for smoother molten metal flow and improved gas release.
本実施形態の製造方法は、キャビティと湯口とを有する成形型に、本体が水平となる状態にして、アルミニウムまたはアルミニウム合金の溶湯を湯口が側方位置にて注湯を開始し、その後、本体が垂直となる状態にして、湯口が上方位置になるように前記成形型を傾斜させながら注湯を完了させて鋳造する。この重力鋳造法によれば、溶湯がキャビティに行き渡って巣の発生が防止できる合理的な鋳造になり、必要な剛性を保ちつつより軽量化を図ることが出来る。なお、湯口は一箇所に限られず、複数箇所に湯口を設ける場合がある。また、上記の重力鋳造に限定されず、既知の鋳造技術が適用できる。 In the manufacturing method of this embodiment, molten aluminum or aluminum alloy is poured into a mold having a cavity and a gate with the body positioned horizontally and the gate positioned to the side. The mold is then tilted so that the body is then positioned vertically and the gate is positioned upward, completing the pour. This gravity casting method allows the molten metal to permeate the cavity, preventing the formation of porosity and achieving a more streamlined casting process, while also achieving a lighter weight while maintaining the necessary rigidity. Note that the gate is not limited to one location, and multiple locations may be provided. Furthermore, the method is not limited to the gravity casting described above, and any known casting technique can be applied.
本発明は、以上説明した実施形態に限定されることなく、本発明を逸脱しない範囲において種々変更が可能である。 The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the scope of the present invention.
１ サスペンションアーム
２ 受座
３ 円筒部、３ａ 第１部位、３ｂ 第２部位
４ クッション連結部
５ 車体側取付部
Ｃ１ スプリング
Ｆ１ 湯流れ方向
Ｋ１ 仮想線
REFERENCE SIGNS LIST 1 Suspension arm 2 Receptacle 3 Cylindrical portion 3a First portion 3b Second portion 4 Cushion connecting portion 5 Vehicle body side mounting portion C1 Spring F1 Melt flow direction K1 Virtual line
Claims (4)
前記第１部位の体積を前記第２部位の体積よりも大きく形成した構成、および／または、前記第１部位の高さを前記第２部位の高さよりも大きく形成した構成であること
を特徴とするサスペンションアーム。 A suspension arm formed by casting, the suspension arm comprising a seat that receives the load of a spring and a cylindrical portion that protrudes from the seat, wherein an upstream side of a molten metal flow direction during casting is a first portion of the cylindrical portion, and a downstream side of the molten metal flow direction during casting is a second portion of the cylindrical portion, the first portion and the second portion being separated by an imaginary line in the short side direction that passes through the center of the cylindrical portion ,
A suspension arm characterized in that the volume of the first portion is formed larger than the volume of the second portion, and/or the height of the first portion is formed larger than the height of the second portion.
前記円筒部は、前記湯流れ方向の上流側の端部から前記湯流れ方向の下流側の端部に向かって傾斜していること
を特徴とするサスペンションアーム。 2. The suspension arm according to claim 1,
The cylindrical portion is inclined from an end portion on an upstream side in the molten metal flow direction toward an end portion on a downstream side in the molten metal flow direction.
アルミニウムまたはアルミニウム合金からなること
を特徴とするサスペンションアーム。 3. The suspension arm according to claim 1,
A suspension arm made of aluminum or an aluminum alloy.
前記第１部位の体積を前記第２部位の体積よりも大きく形成すること、および／または、前記第１部位の高さを前記第２部位の高さよりも大きく形成すること
を特徴とするサスペンションアームの製造方法。 A method for manufacturing a suspension arm that includes a seat that receives a spring load and a cylindrical portion that protrudes from the seat and is formed by casting, wherein an upstream side of a molten metal flow direction during casting is a first portion of the cylindrical portion and a downstream side of the molten metal flow direction is a second portion of the cylindrical portion, and the first portion and the second portion are separated by an imaginary line in the short side direction that passes through the center of the cylindrical portion ,
A method for manufacturing a suspension arm, characterized in that the volume of the first portion is formed to be larger than the volume of the second portion, and/or the height of the first portion is formed to be larger than the height of the second portion.
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| JP2022050283A JP7784337B2 (en) | 2022-03-25 | 2022-03-25 | Suspension arm and method for manufacturing the suspension arm |
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| JP2022050283A JP7784337B2 (en) | 2022-03-25 | 2022-03-25 | Suspension arm and method for manufacturing the suspension arm |
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| JP7784337B2 true JP7784337B2 (en) | 2025-12-11 |
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|---|---|---|---|---|
| JP2002045956A (en) | 2000-05-22 | 2002-02-12 | Hitachi Ltd | Electronic device housing and method of manufacturing the same |
| JP2002274133A (en) | 2001-03-16 | 2002-09-25 | Nissan Motor Co Ltd | Suspension arm |
| JP2008018784A (en) | 2006-07-11 | 2008-01-31 | Toyota Motor Corp | Car body rear structure |
| DE102013004352A1 (en) | 2013-03-12 | 2014-09-18 | Volkswagen Aktiengesellschaft | Spring link for a wheel suspension of a motor vehicle |
| JP2016168992A (en) | 2015-03-16 | 2016-09-23 | 日信工業株式会社 | Rear suspension structure for vehicle and method for forming caulking portion of lower arm |
| US20170057313A1 (en) | 2015-08-28 | 2017-03-02 | Raufoss Technology As | Control arm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271920A (en) * | 1996-04-04 | 1997-10-21 | Hitachi Metals Ltd | Metallic mold casting method and metallic mold cast product |
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2022
- 2022-03-25 JP JP2022050283A patent/JP7784337B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002045956A (en) | 2000-05-22 | 2002-02-12 | Hitachi Ltd | Electronic device housing and method of manufacturing the same |
| JP2002274133A (en) | 2001-03-16 | 2002-09-25 | Nissan Motor Co Ltd | Suspension arm |
| JP2008018784A (en) | 2006-07-11 | 2008-01-31 | Toyota Motor Corp | Car body rear structure |
| DE102013004352A1 (en) | 2013-03-12 | 2014-09-18 | Volkswagen Aktiengesellschaft | Spring link for a wheel suspension of a motor vehicle |
| JP2016168992A (en) | 2015-03-16 | 2016-09-23 | 日信工業株式会社 | Rear suspension structure for vehicle and method for forming caulking portion of lower arm |
| US20170057313A1 (en) | 2015-08-28 | 2017-03-02 | Raufoss Technology As | Control arm |
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| Publication number | Publication date |
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| JP2023143087A (en) | 2023-10-06 |
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