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1. (WO2018142832) VEHICLE SUSPENSION COIL SPRING

Pub. No.:    WO/2018/142832    International Application No.:    PCT/JP2017/047279
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: F16F 1/06
B60G 11/16
B60G 15/07
Applicants: NHK SPRING CO., LTD.
日本発條株式会社
Inventors: NISHIZAWA, Shinichi
西沢 真一
Title: VEHICLE SUSPENSION COIL SPRING
Abstract:
A vehicle suspension coil spring (2) according to one embodiment comprises a lower end-coil portion (20), an upper end-coil portion (21), and a cylindrical effective portion (22) between the lower end-coil portion (20) and the upper end-coil portion (21). At at least one of the upper end-coil portion (21) and the lower end-coil portion (20), a tapered section (25), (26) having a taper length and a taper thickness for controlling the load axis (FL) of the coil spring (2) is formed. The thickness of the tapered section (25), (26) decreases from a thickness changing portion (25a), (26a) located at an intermediate point, in the length direction, of the end-coil portion (20), (21) toward the tip of a wire (4). The thickness changing portion (25a), (26a) is disposed at a position closer to the load axis (FL).