Nhk Spring Co., Ltd.

Akihiko Nishikawa

Ken Takahashi

Toshiaki Sato

Michihiko Ayada

Masahiro Umezawa

Yoshihiro Koshita

Mitsuhiro Sugiyama

Yasuharu Sakurai

Yoshio Kobayashi

Kenji Yamamotoya

Hideto Enomoto

Akifumi Otani

Tomotake Kato

Taichi Inage

Suguru Kajigaya

A stabilizer includes bend sections. With respect to positions in a circumferential direction of a radial cross section of each of the bend sections, a center of an inside of a bend is defined as 0&#xb0;, and a center of an outside of the bend is defined as 180&#xb0;. The bend sections each include a bend interior section located at 0&#xb0;, a bend exterior section located at 180&#xb0;, a first side section located at 90&#xb0;, and a second side section located at 270&#xb0;. The bend interior section has compressive residual stress from a surface to a first depth. The bend exterior section has compressive residual stress to a second depth. The first side section has compressive residual stress to a third depth. The second side section has compressive residual stress to a fourth depth.

Stabilizer for vehicle, and shot peening jig for stabilizer

An annular reference surface is formed around a through-hole of an eye portion. A distal-end-side curved portion is formed at a first corner portion, on an outer side of the annular reference surface. The thickness of the distal-end-side curved portion is reduced in a range of a length from the first flat surface toward the distal end surface. A hole-side curved portion whose thickness is reduced toward an inner surface of the through-hole is formed at a second corner portion, on an inner side of the annular reference surface. The length of the hole-side curved portion is less than the length of the distal-end-side curved portion. The hole-side curved portion is curved with a greater curvature than that of the distal-end-side curved portion.

Vehicle stabilizer, processing device for eye portion of stabilizer, and processing method for eye portion

A stabilizer includes a stabilizer main body, and eyes formed on both ends of the stabilizer main body. Through-holes are formed in fastening surfaces of the eyes, respectively. The stabilizer main body is covered with a main body coating film. The eye is covered with an eye coating film whose thickness is less than a thickness of the main body coating film. An inner surface of the through-hole is covered with an inner surface coating film. An incomplete coating portion is formed at a part of the inner surface of the through-hole in a circumferential direction. The incomplete coating portion is located on an extension of a straight line connecting a center of the through-hole and the center of gravity of the stabilizer main body in a side view of the stabilizer main body.

Stabilizer for vehicle

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.

Suspension coil spring

A strut-type suspension includes a compression coil spring, a lower spring seat, an upper spring seat, and a shock absorber. The compression coil spring is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber. The compression coil spring is mounted in a vehicle body in such a state that it is compressed between spring seats. The compression coil spring includes a large-diameter wire portion and a small-diameter wire portion. The large-diameter wire portion is provided in a vehicle inner-side portion of the compression coil spring. The small-diameter wire portion is provided in a vehicle outer-side portion. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Strut-type suspension and compression coil spring for suspension

A knee-action-type suspension is provided with an arm member, a compression coil spring, and a shock absorber. The coil spring is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire of the coil spring includes a large-diameter wire portion, a small-diameter wire portion, and a wire diameter varying portion. The large-diameter wire portion is provided in a first portion of the coil spring, which is on the side near to a pivot. The small-diameter wire portion is provided in a second portion of the coil spring, which is on the side far from the pivot. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Suspension and compression coil spring for suspension

A steel rod body is fixedly fitted, at its end, with a metallic coupling member manufactured independently of the rod body. A solid section having a free end is formed either at the end of the rod body or the coupling member, while a tube section having an opening at its end is provided on the corresponding end of either the rod body or the coupling member. Circumferential and axial grooves are formed on the outer peripheral surface of the solid section. At least the free end of the solid section is inserted into the opening of the tube section, and the tube section is crimped by means of dies. Thus, part of the metal material of the tube section creeps into indentations on the solid section so that the tube section and the solid section are firmly linked together for integration. A waterproof sealant is provided either on an inner surface of the tube section or on an outer surface of the solid section.

Growing community of inventors

Yokohama, Japan

Akihiko Nishikawa