SUSPENSION COIL SPRING

摘要

A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.

主权项

1. A suspension coil spring formed of a wire made of spring steel, which is shaped helically, the coil spring being arranged in a state that it is compressed between a lower spring seat and an upper spring seat of the suspension, and extends and retracts within a predetermined range of deformation according to a load,
the coil spring comprising a lower end turn portion which is supported by the lower spring seat, an upper end turn portion which is supported by the upper spring seat, and an effective portion formed between the end turn portions, wherein the lower end turn portion comprises: a first portion which is in contact with the lower spring seat irrespective of magnitude of the load; and a second portion which is in contact with the lower spring seat or separated from the lower spring seat according to the load, a wire diameter of the second portion being greater than a wire diameter of the first portion and an average wire diameter of the effective portion.