公开(公告)号：EP3159572A4

公开(公告)日：2018-04-04

申请号：EP15808893

申请日：2015-06-19

Applicant: NHK SPRING CO LTD

Inventor： KATO NOBUHARU ,  TSURUGAI KENGO ,  MORIMOTO MASAFUMI

IPC: F16F1/12 ,  F16F1/04 ,  F16F1/06

CPC classification number: F16F1/06 ,  F16F1/042 ,  F16F1/123 ,  F16F1/125

Abstract: Provided is a coiled spring assembly, capable of properly engaging a seat for a coiled spring as a seat member with a coiled spring to prevent forced interference between an end turn of the coiled spring and the seat for the coiled spring and increase durability. The coiled spring (3) has an end turn (9) (11) formed up to a first turn with a reduced diameter and a transition portion (13) (15) with a diameter gradually increasing from the end turn (9) (11) to a body portion (7), the seat (5) for the coiled spring has a seat portion (17), a mounting shaft portion (19), and an enlarged diameter portion (21), the mounting shaft portion (19) has an axial length defining a gap or a zero-gap between the enlarged diameter portion (21) of the seat (5) for the coiled spring and the end turn in a free state in which the end turn (9) (11) is fitted to the mounting shaft portion and the bearing surface (9a) (11a) of the end turn (9) (11) is in contact with the receiving surface (17a) of the seat portion (17), and the transition portion (13) (15) circumvents the enlarged diameter portion (21) while the bearing surface (9a) (11a) of the end turn (9) (11) is in contact with the receiving surface (17a) of the seat portion (17).