Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Fine Sinter Co., Ltd

Central Japan Railway Company

University of Iowa Research Foundation

Railway Technical Research Institute

Takahiro Fujimoto

Junichi Nakagawa

Atsushi Sakaguchi

Takanori Kato

Hiroshi Nogami

Kazutaka Asabe

Yuki Ichikawa

Naruo Miyabe

Takeshi Nakano

Osamu Kondo

Takeshi Kurita

Yasushi Karino

Hideki Minami

Shingo Abe

Yuiko Sakayama

Jun Asano

Seiji Kanamori

Tokitake Okahira

Manabu Kubota

Ryuichi Nishimura

Yoshiyuki Shimokawa

Tomohiro Otsuka

Satoru Nakano

Daisuke Shinagawa

Yusuke Wakabayashi

Nobuo Shiraishi

Hirotoshi Kawabe

Isao Shimazoe

Shin-ichi Saga

Takashi Maejima

Mitsuhiro Okamoto

Kazumichi Kawasaki

Hiroyuki Sugiyama

Yuiko Shiotani

Kumpei Sano

Hajime Takami

Yohsuke Yamazaki

Hiroki Sakai

Christofer Feldmeier

Masanori Nakae

Shin-Ichi Saga

A brake disk unit includes a rotating member, a brake disk, and a control member. The brake disk includes a disk main body, fins, and convex portions and/or concave portions. The control member includes a support portion and a projecting portion. At least a part of the projecting portion is arranged between fins that are adjacent in the circumferential direction of the brake disk. A gap is formed between the projecting portion and the brake disk. On the surface of the brake disk, the convex portions and/or the concave portions are provided further on the outer side in the radial direction of the brake disk than a minimum opening portion of the gap.

Brake disk unit for railway vehicle

There is provided a brake lining for a railway vehicle that can reduce brake squeal in braking. A brake lining for a railway vehicle is used for a disc brake system of a railway vehicle. This brake lining includes a base plate, a sintered friction material, and a friction material supporting mechanism. The friction material supporting mechanism is disposed between the base plate and the sintered friction material and supports the sintered friction material in such a manner that the sintered friction material can move with respect to the base plate. The sintered friction material has a Young's modulus of 35.0 GPa or more.

Brake lining for railway vehicle, disc brake system for railway vehicle including same, and sintered friction material to be used for brake lining for railway vehicle

An aerodynamic noise reduction memberincludes: a plate-like support portionsandwiched between a plurality of finsandof a brake diskand a rotating memberof a railroad vehicle; and a plurality of protruding portionsprotruding from the support portion. Each of the plurality of protruding portionsis provided in such a manner that, in a state in which the support portionis sandwiched between the plurality of finsandand the rotating member, each of the protruding portionspartially occludes between the fastening finand the anchoring finadjacent to each other in a circumferential direction of the brake disk

Aerodynamic noise reduction member, railroad vehicle brake disk unit, railroad vehicle disk brake, railroad vehicle wheel, and railroad vehicle

A brake disc for a railway vehicle includes: a disc plate portion that has a sliding portion of a front face; a plurality of radial fins that are provided on the rear face of a disc plate portion, and that have a shape that extends in the radial direction of the disc plate portion; and a circumferential rib that is provided between each pair of adjacent radial fins, and that has a shape that extends in the circumferential direction of the disc plate portion. A flow path for air is formed between the pair of radial fins, and the flow path for air is narrowed by the circumferential rib. On the circumferential rib, a gradual slope for suppressing fluctuations in an airflow that passes between the pair of radial fins is provided from a base part to a top part.

Brake disc for railway vehicle

This brake lining includes: a plurality of friction members which are arranged to be spaced from each other, each of the friction members having a front surface that is to face a sliding surface of a brake disk; a back board fastened to a back surface of each of the friction members; a base plate that supports each of the friction members at a region including a center portion of each friction member; and an elastic member disposed between the base plate and the back board, on a back surface side of each friction member. Two friction members that are adjacent to each other are taken as a pair, and the back board is fastened to each of the pairs of friction members. In each pair of friction members, the two friction members are arranged along the circumferential direction of the brake disk.

Brake lining for a railway vehicle and disk brake equipped with the same

The wheel is for a railway vehicle that travels on a rail. The wheel includes a wheel tread, a flange and a throat portion. The wheel tread is provided at an outer circumferential portion of the wheel. The wheel tread faces a head surface of the rail. The flange is provided at the outer circumferential portion of the wheel. The flange projects further outward than the wheel tread in the radial direction of the wheel. The throat portion connects the surface of the flange and the wheel tread. The throat portion has a protrusion. The protrusion projects to the rail side. The protrusion extends along the entire circumference of the throat portion.

Wheel for railway vehicle

A brake disc for a railway vehicle is provided in which noise arising from the brake disc during high-speed rotation of a wheel is reduced by a large margin. A brake disc for a railway vehicle includes: a disc plate portion that has a sliding portion on a front face thereof; a plurality of through-holes that pass from the front face to a rear face of the disc plate portion and are arranged in alignment in the circumferential direction of the disc plate portion, the through-holes allowing bolts to pass therethrough for fastening together the disc plate portion and a wheel of the railway vehicle; and a groove provided to link a plurality of through-holes on the front face side of the disc plate portion.

A brake lining includes friction structures, back boards fastened to respective the friction structures, a base plate supporting the friction structures. Each of the friction structures includes two adjacent friction portions with a groove formed in the front surface in between, and a thin portion with a smaller thickness than thicknesses of the friction portions, the thin portion located in a position corresponding to the groove. Each of the friction structures is supported by the base plate on two support points located in the two friction portions respectively. The thin portion has a constant length, the length being equal to a maximum width of the friction portions and satisfying a condition that L/D is equal to or greater than 1.1, where D denotes the length of the thin portion and L denotes a distance between the two support points located in the friction portions.

Brake lining for a railway vehicle and disc brake equipped with the same

A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions which are radially projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present in a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and the outer peripheral surface of the circular plate portion follows the inner peripheral surface of the rim portion in a region extending to the outer side from the minimum section portion.

Railway wheel with brake disc

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.

Brake lining for railroad vehicle

A disc brake for railway vehicles includes a brake disc fixed to a wheel or an axle of a railway vehicle and a brake lining configured to be pressed against a frictional surface of the brake disc by a brake caliper. The brake lining includes a plurality of friction members arranged to be spaced from each other, each of the friction members having a surface that faces the frictional surface of the brake disc, a metallic backing secured to back surfaces of the friction members, and a base plate supporting the friction members on the back surface side via spring members. The base plate is mounted to a brake caliper; wherein the friction members are provided in pairs with each pair being formed by two adjacent ones of the friction members, and the metallic backing is a one-piece member provided for each pair of the friction members.

Brake lining for railway vehicles and disc brake equipped with the same

A brake disc for a railway vehicle, including a ring-shaped plate portion with a front side serving as a frictional surface and a plurality of fins being projected and disposed radially on the back side of the plate portion, the plate portion being fixed to a wheel, wherein a rib is provided between fins adjacent to each other, and a slit developing in the direction from a wheel-side face of the rib toward the back side of the plate portion is disposed in a circumferentially intermediate portion of the rib, thereby making it possible to suppress the deformation caused by frictional heat.

Growing community of inventors

Tokyo, Japan

Takahiro Fujimoto