号数	ばね論文集４１号（１９９６年）
ページ数	pp.19-26
種類	論文
論文名	サスペンション設計における懸架コイルばねの横力低減技術
Title	Approaches to Minimizing Side Force of Herical Coil Springs in Suspension Design
著者	鈴木 聡1)・神谷 修二1)・今泉 敏幸1)・真田 幸知2)
Author	Satoshi SUZUKI1)・Syuji KAMIYA1)・Toshiyuki IMAIZUMI1)・Yukitomo SANADA2)
抄録	車両の乗心地を改善するため，横力を最小にする懸架コイルばねの仕様を研究した。有限要素コードＡＢＡＱＵＳを用いて系統的な解析を行い，ばね座の傾き角とばねの力学的条件の横力への影響を調べた。横力の大きさは，コイルの自由巻数によって周期的に変動し，自由巻数が少ないほど大きくなり，自由巻数が整数の時に最小となる。ばねの上部座に作用する横力の方向に上部座を移動することにより，横力が減少する。上部座を適当な方向に傾けると，横力は著しく減少する。
Abstract	In the Macpherson strut type suspension, a spring offset is frequently adopted to compensate the side load acting on the damper rod with the reaction force of a spring ; this offset amount is determined based on the assumption that the reaction force is directed along the spring axis. However, this is valid only for close-coiled helical springs. For helical springs of usual design,the reaction force will have the component perpendicular to the coil axis, as often pointed out by many researchers. Therefore, this component,that is the side force of the spring, should be taken into consideration to improve the riding comfort. In this paper,we first investigateｄ the specifications of the springs which minimizes the side force. Then we studied the effect of the tilting angle of a spring seat and of the kinematic condition of the spring on the side force. In consequence , it was found that the side force periodically increases with decrease of the number of free coils , minimum values occuring at integer numbers of free coils. it was also found that the side force can be reduced by moving the upper seat of the spring in the direction of the side force acting on the upper seat. Moreover,we found that the side force is remarkably reduced by tilting the upper seat in a proper direction.
著者の所属	1)中央発条株式会社　2)トヨタ自動車株式会社
Belonging	1)Chuou Spring Co., Ltd. 2)Toyota Motor Corp.
Key Words	Side force ,Helical coil spring , Riding comfort ,Finite element method