US 2004/0169322 A1Published application

Suspension coil spring

AssigneeMitsubishi Steel Mfg. Co., Ltd.

InventorsJunji Ogura, Yukihiro Sugimoto, Masahiko Shimizu

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Abstract

A suspension coil spring, when assembled to a suspension device, in which a spring reaction axis is positioned coincident with or sufficiently close to a load input axis, and the design and manufacture of coil springs are facilitated. Namely, A suspension coil spring (19) in a free state is formed so that a coil axis (AC) is bent in V-shape at bend point (PB) and the distance from the end turn center (CU) of the upper seating surface (38) to an imaginary coil axis (AI) is an upper inclination amount (VU), and the distance from the end turn center (CL) to the imaginary coil axis (AI) is a lower inclination amount (VL). When the suspension coil spring (10) is interposed between spring seats (22, 24) in the suspension device and compress along a strut axis, the spring reaction axis of the suspension coil spring (10) is inclined and offset with respect to the imaginary coil axis (AI) according to the inclination amounts (VU, VL).

Claims2

Dependent claims

A suspension coil spring which is interposed between an upper seat and a lower seat in a strut type suspension device for a vehicle,

wherein the suspension coil spring in a free state is formed such that a coil axis is bent in a V shape at a bent point which is a portion that corresponds to a turn from a spring terminal to R turn (R is a positive real number),
presuming that a bending angle at the bending point is 0°, at least one of a center of an upper end turn portion and a center of a lower end turn portion is made eccentric in a predetermined eccentric amount in a predetermined eccentric direction, with respect to an imaginary coil axis, and
in a state in which the suspension coil spring is interposed between the upper seat and the lower seat in the suspension device, and compressed along a strut axis, the eccentric direction and the eccentric amount of each center of the upper end turn portion and the lower end turn portion with respect to the imaginary coil axis are set so as to position a spring reaction axis in the suspension device sufficiently close to a load input axis.

Dependencies are inferred from the claim text.

Facts

Application: 10/474,590Filed 25 Feb 2004
Priority: JP 2001-11523513 Apr 2001
Published: 2 Sep 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B60G 15/07
And fluid damper: the damper being connected to the stub axle and the spring being arranged around the damper
F16F 1/04
Made of steel or other material having low internal friction ; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring…
B60G 2200/142
With lateral arms: with a single lateral arm, e.g. MacPherson type
B60G 2202/312
With the spring arranged around the damper, e.g. MacPherson strut: the spring being a wound spring