Abstract: 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.

Abstract: A brake lining includes a mounting plate, sliding members and elastic members. The sliding members are arranged in the transverse direction and the longitudinal direction of the mounting plate on one surface of the mounting plate to form transverse rows and longitudinal rows. The elastic members are provided in correspondence with the sliding members. Each of the elastic members is disposed between the corresponding sliding member and the mounting plate. A gap exists between adjacent transverse rows, and extends over the entire length of the transverse rows. A gap exists between adjacent longitudinal rows, and extends over the entire length of the longitudinal rows. The gap has a width that is smaller than a width of the gap.

Abstract: A disc brake device includes a rotary member, a brake disc, and a control member. The brake disc includes a disc body having an annular shape and fins. The control member controls an airflow rate between the fins disposed adjacent to each other in a circumferential direction of the brake disc. The control member includes a base plate and a protruding portion. The protruding portion protrudes from the base plate toward the disc body. A top surface of each fin has a recessed portion. The protruding portion extends in the circumferential direction through from the recessed portion of one of the fins disposed adjacent to each other to the recessed portion of the other of the fins.

Abstract: A disc brake device includes a rotary member, a brake disc, a control member, and a fastening member. The brake disc includes a disc body having an annular shape and a plurality of fins. The control member includes a base plate and a protruding portion, and controls an airflow rate between the fins disposed adjacent to each other. At least one of the fins has a fastening hole including a small diameter portion. The base plate has a through hole. A shaft portion of the fastening member is inserted through the small diameter portion and the through hole. A peripheral edge of the through hole is disposed on an outer circumferential side of a peripheral edge of the small diameter portion.

Abstract: A brake disc includes a disc body and a plurality of fins. The plurality of fins are disposed on one surface of the disc body such that each of the fins extends from an inner peripheral side toward an outer peripheral side of the disc body. Each of the fins includes two side surfaces and a top surface. Among the plurality of fins, at least one fin includes a plurality of protruding ridge portions. The plurality of protruding ridge portions are arranged in a radial direction of the disc body on at least one side surface of the two side surfaces of the fin. Each of the protruding ridge portions extends between the disc body and the top surface of the fin.

Abstract: A brake disc includes an annular disc body and fins. The fins are radially disposed on a back surface of the disc body. At least one of the fins have a bolt hole at a central portion of the fin in a radial direction of the disc body. The disc body includes an inner circumferential portion. The inner circumferential portion is positioned inward from the bolt hole in the radial direction. The inner circumferential portion decreases in thickness as the inner circumferential portion extends inward in the radial direction. The fins each include a top surface and a convex portion. The convex portion protrudes inward from an imaginary plane in the radial direction. The imaginary plane passes an end portion of the top surface and an inner circumferential edge of the back surface.

Abstract: 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.

Abstract: 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.

Abstract: A brake lining includes a mounting plate, sliding members and elastic members. The sliding members are arranged in the transverse direction and the longitudinal direction of the mounting plate on one surface of the mounting plate to form transverse rows and longitudinal rows. The elastic members are provided in correspondence with the sliding members. Each of the elastic members is disposed between the corresponding sliding member and the mounting plate. A gap exists between adjacent transverse rows, and extends over the entire length of the transverse rows. A gap exists between adjacent longitudinal rows, and extends over the entire length of the longitudinal rows. The gap has a width that is smaller than a width of the gap.

Abstract: An attachment structure is a structure that attaches an annular brake disk to an attachment object member that is a wheel or a disk body of a railway vehicle. The attachment structure includes a fastening member and an elastic member. The elastic member is disposed between a nut of the fastening member and the brake disk. The elastic member has a member body having a tubular shape, and a flange. The flange is connected to an end part on the nut side among two end parts of the member body. The flange protrudes outward from the member body and contacts an outer peripheral portion of the nut.

Abstract: There is provided a brake lining for railway vehicle that can reduce brake squeal in braking. A brake lining for 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.

Abstract: 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.

Abstract: The disk brake device includes a brake disk, a brake lining, and a brake caliper. The brake lining includes a friction member and a base plate for supporting the friction member. When a plurality of bolt holes are projected onto a rear face of the base plate in a direction of an axle, a boundary passes through areas of the projected bolt holes. The brake caliper includes an inner pressing surface that applies a load on an inner area and an outer pressing surface that applies a load on an outer area. The load applied on the inner area from the inner pressing surface is different from the load applied on the outer area from the outer pressing surface. In this way, it is possible to suppress stress imposed on bolts while suppressing a local temperature rise in the brake disk.

Abstract: A railway brake lining includes one or more primary friction members, one or more secondary friction members, and a base plate. Each of the primary friction members is elastically fastened to the base plate. Each of the secondary friction members is fixed on the base plate. A minimum distance between the friction members and a center of an axle is denoted by r1, and a maximum distance between the friction members and the center of the axle is denoted by r2. The centers of one or more of the primary friction members are located in an area that is at a distance of {r1+(r2?r1)/3} to {r1+2×(r2?r1)/3} from the center of the axle. The total slide contact area T1 of the primary friction members and the total slide contact area T2 of the secondary friction members satisfy 2/25?T2/(T1+T2).

Abstract: 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.