In order to provide a development of friction ring elements for a friction ring set for arranging on the wheel web of a track wheel in order to form a track wheel brake, wherein the friction ring elements can be simply and cost-effectively produced and can be easily fitted with linking elements, a friction ring element (10) is proposed for a friction ring set (200) for arranging on the wheel web (2) of a track wheel (1) for a railway vehicle in order to form a track wheel brake (100), wherein the friction ring element (10) has a friction ring (11) and multiple linking elements (12, 13) designed as separate components and arranged on the friction ring (11), and wherein at least some of the linking elements (12, 13) are force-lockingly connected to the friction ring (11).

A slack adjuster for use with a braking system which has an increased let-out length that enables the use of brake shoes having an increased thickness. The slack adjuster includes a dual spring and canister assembly, an external yoke trigger, or a combination of both the dual spring and canister assembly and the external yoke trigger. A method of retrofitting a truck-mounted brake system is provided, in which the slack adjuster is positioned within the brake system in order to increase the let-out length while maintaining a predetermined spatial envelope within the brake system. The slack adjuster has an increased let-out length enabling the use of thicker brake shoes without requiring modification of the interacting components of the truck mounted brake system since the overall size of the slack adjuster remains the same.

A ventilated brake disc comprising a pair of annular members, each having a brake application surface and a back surface, a plurality of connection members that connects said pair of annular members and defines, together with said back surface, ventilation channels for passage of cooling air, and a plurality of longitudinal vortex generators (LVG) disposed along the passage of cooling air that generates vortices with a central axis in the downstream direction of the cooling air.

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.

An actuation mechanism for a disc brake. The actuation mechanism may include a yoke, a piston, a wear adjustment mechanism, and a rolling element bearing. The piston may have a rotatable portion. The wear adjustment mechanism may have a driving portion. The rolling element bearing may be located between the driving portion and the yoke.

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.

A brake disk for mounting on a rail vehicle wheel that comprises a multitude of elongate cooling elements on one side, wherein a plurality of cooling elements are configured as transverse elements, and the size of the transverse elements is smaller in the radial direction than in the direction perpendicular to the radius of the brake disk at the location of the transverse element so as to reduce windage.

The invention relates to an axle-mounted brake disk for a rail vehicle, comprising two friction rings which are arranged in parallel and at a distance from each other and are interconnected by a plurality of ribs extending in the direction of the rotational axis of the friction rings, where at least some of the ribs are embodied with different cross-sections from each other, where the cross-sections of a first subset of the ribs, embodied as supporting elements transmitting pressure forces, do not fall below a minimum cross-section, defined by the stability required in relation to the mechanical load during a brake process, and the cross-section of a second subset of the ribs, used to radiate thermal energy, falls below the minimum cross-section.

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 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.