Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Shingo Abe

Takanori Kato

Takahiro Fujimoto

Jun Noguchi

Hideki Minami

Yoshinari Yamamura

Chihiro Kozuka

Hiroki Sakai

Masanori Nakae

Ruben De La Prida Caballero

A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. A center of the rim in the axial direction of the wheel is disposed closer to the flange in the axial direction than a center of the boss in the axial direction is. The web has a plate-thickness center line that has a linear shape when the wheel is viewed in its longitudinal section. When an angle that the plate-thickness center line forms with the axial direction is denoted by a, a distance in the axial direction from a side face of the rim to an outer end of the plate-thickness center line is denoted by Pw, a length of the rim in the axial direction is denoted by Wr, and Pw/Wr is denoted by L, the wheel satisfies the expression L≥0.0223α−1.363. Where, the angle α is 90° or less.

Wheel for railway vehicle

A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. The web connects the boss and the rim. When the wheel is viewed in its longitudinal section, the web has a linear plate-thickness center line that is inclined such that the plate-thickness center line approaches the flange side as it extends outward in a radial direction. When the wheel is viewed in its longitudinal section, an outer end of the plate-thickness center line is positioned between the flange and a center of the tread in an axial direction of the wheel.

This soundproof wheel includes a soundproofing device () which is mounted to an inner peripheral surface () of a rim section () of the wheel. The soundproofing device () is provided with: a fixing ring () which is fitted in and fixed to a groove () formed in the inner peripheral surface (); a first elastic body section (A) which is stuck to an outer peripheral surface () of the fixing ring (), is disposed within the groove (), and has a plurality of first elastic body pieces; an additional mass section () which is stuck to a side of the first elastic body section (A) opposite to the fixing ring (), is disposed within the groove (), and has a plurality of additional mass pieces; and a second elastic body section (B) which is stuck to a side of the additional mass section () opposite to the first elastic body section (A), is disposed within the groove (), and has a plurality of second elastic body pieces. The soundproofing device () includes a plurality of dynamic vibration absorbers. Each of the dynamic vibration absorbers has first and second elastic body pieces and an additional mass piece. This soundproof wheel allows for significant reduction in wheel vibration noise and is highly durable.

Soundproof wheel for railway vehicle

A soundproof wheel includes a soundproofing device which is mounted to an inner peripheral surface of a rim section of the wheel. The soundproofing device is provided with: a fixing ring which is fitted in and fixed to a groove formed in the inner peripheral surface of the rim section; an elastic body section which is adhered to an outer peripheral surface of the fixing ring, is disposed within the groove, and has a plurality of elastic body pieces; and an additional mass section which is adhered to an opposite side of the elastic body section with respect to the fixing ring, is disposed within the groove, and has a plurality of additional mass pieces. The soundproofing device includes a plurality of dynamic vibration absorbers, each having an elastic body piece and an additional mass piece. This soundproof wheel allows for reduction in wheel vibration noise and is highly durable.

Growing community of inventors

Amagasaki, Japan

Shingo Abe