A wheel and brake disc apparatus of a vehicle includes a roadway wheel and a brake disc mounted rotatably to the vehicle, the roadway wheel and the brake disc arranged about an axis of rotation. The roadway wheel extends radially in relation to the axis of rotation to a wheel rim configured to hold a tire adapted to operate on a roadway surface. The brake disc is inboard of the roadway wheel and extends radially in relation to the axis of rotation to a brake disc rim. A brake caliper assembly mounted at a fixed location over the brake disc rim is configured to squeeze brake pads against the brake disc. The brake disc rim includes a tread configured to operate on a rail without interference from the brake caliper assembly.

A brake disc for providing a braking surface on a rotating body, such as a railway wheel is provided. The brake disc includes a plurality of arcuate segments (126) arranged to form a ring and a plurality of joining elements (38) for connecting the segments to adjacent segments. Each segment includes: an inner side configured to contact a surface of a wheel; an outer side having a braking surface for contacting a braking mechanism; at least one socket (140) on each radial end (142) of the segment (126) for receiving one of the plurality of joining elements (38); and a groove on the inner side of the segment configured to receive a coupling member to form a pivot joint (58) for positioning the segment (126) on the surface of the wheel.

A pad for disc brakes for railway vehicles includes a base plate, a plurality of friction elements fixed to the base plate, and a plurality of spacers, each of which is mounted between the base plate and a respective friction element. At least one fixing hole is obtained in each one of the spacers, which is engaged by a respective rivet to lock the friction element to the base plate. Each one of the spacers includes a plurality of metal plaques, each having a fixing hole obtained in the plaque. The metal plaques are stacked on top of one another so that the respective fixing holes coincide.

A rail wheel with a wheel body and wheel brake discs connected thereto with fastening elements on both sides is designed in such a way that at least in the respective contact regions of the wheel brake discs a mechanically and thermally highly resilient intermediate layer is arranged on the wheel body.

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.

In order to provide a track wheel, in particular a friction ring for a track wheel, which allows for effective cooling of a braking device of the track wheel, a friction ring (100) for a track wheel of a rail vehicle is proposed, comprising a friction side with a friction surface and a rear side (10) facing away from the friction side, wherein securing elements (11) are arranged on the rear side (10) protruding from the rear side (10), wherein the securing elements (11) have a substantially triangular shape when viewed from above, wherein it is provided that each of the securing elements (11) comprises a radial length R, wherein the friction ring (100) comprises an inner diameter Ri and an outer diameter Ra, and wherein R=0.30-0.90 (Ra-Ri).

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.

A braking assembly for a wheel includes a first brake disc and a fastener system. The first brake disc is arranged to be coupled to a first side of the wheel and has a first wheel coupling face. The first brake disc defines a first through-hole having a first flared inner portion towards the wheel coupling face. The fastener system includes a first tapered portion that is complementary to the first flared inner portion and configured to abut the first flared inner portion when the fastener system is disposed in the first through-hole to couple the first brake disc to the first side of the wheel.

A braking assembly (100) for a wheel (W) is described. The braking assembly (100) comprises at least a first brake disc (102) having a central axis (x1) and arranged to be coupled to a first side (S1) of the wheel. The first brake disc (102) comprises a wheel coupling face (104) and defines at least one through-hole (106) along an axis (x2) parallel to the central axis (x1) of the first brake disc (102). The at least one through-hole (106) defined by the first brake disc (102) defines at least one inner portion (108) concave toward the axis (x2) along which the through-hole (106) is defined and having a decreasing diameter toward the wheel coupling face (104). The braking assembly (100) further comprises at least one fastening means (110) comprising a first convex portion (112), complementary to the concave inner portion (108) defined by the through-hole (106) of the first brake disc (102). At least part of the first convex portion (112) of the fastening means (110) is arranged to abut against at least part of the concave inner portion (108) defined by the through-hole (106) of the first brake disc (102), when the first brake disc (102) is coupled to the first side (S1) of the wheel. A wheel, a brake disc and a further braking assembly are also described.

A brake assembly is provided that may include a first friction ring having a plurality of mounting assemblies spaced around the first friction ring and configured to secure the first friction ring to a web of a wheel. At least one of the plurality of mounting assemblies of the first friction ring may include a first arcuate body surrounding a first opening. The brake assembly may also include a second friction ring having a plurality of mounting assemblies spaced around the second friction ring and configured to secure the second friction ring to the web of the wheel. The brake assembly may also include a flexible fastener disposed through the first opening and second opening and configured to be disposed through the web of the wheel to secure the web of the wheel between the first arcuate body and the second arcuate body.