There is provided an apparatus for applying a braking force to a brake disc using a brake pad. The apparatus comprises a lever configured to rotate about a first fulcrum, and a pressing member attached to said lever and for urging a brake pad against a brake disc. A component is arranged and configured to ensure that said pressing member has a circular translational movement upon rotation of said lever, and a rotatable input member is configured to rotate a first member. In use, rotation of said first member causes movement of an actuating member along an first axis (A), and said axial movement of said actuating member causes said lever to rotate about said first fulcrum for applying a braking force to said brake disc.

There is provided an apparatus for applying a braking force to a brake disc using a brake pad. The apparatus comprises a lever configured to rotate about a first fulcrum, and a pressing member attached to said lever and for urging a brake pad against a brake disc. A component is arranged and configured to ensure that said pressing member has a circular translational movement upon rotation of said lever, and a rotatable input member is configured to rotate a first member. In use, rotation of said first member causes movement of an actuating member along an first axis (A), and said axial movement of said actuating member causes said lever to rotate about said first fulcrum for applying a braking force to said brake disc.

A brake actuator for railway vehicles, comprising: a main body having a braking chamber, a service braking piston movable with respect to the main body along a longitudinal axis, a pair of levers articulated to the main body and bearing respective brake pads, a transmission mechanism including an auxiliary body, a pair of thrust elements articulated to said levers, a pair of carriages movable with respect to the auxiliary body along a transverse direction perpendicular to said longitudinal axis, and a pair of slack adjusters each of which is disposed between a respective carriage and a respective thrust element, wherein the transmission mechanism comprises a floating member, which is free to pivot with respect to the service braking piston about an axis perpendicular to said longitudinal axis and to said transverse axis, wherein the floating member carries a first and a second pair of thrust bearings which cooperate with cam surfaces of said carriage.

A brake actuator for railway vehicles, comprising: a main body having a braking chamber, a service braking piston movable with respect to the main body along a longitudinal axis, a pair of levers articulated to the main body and bearing respective brake pads, a transmission mechanism including an auxiliary body, a pair of thrust elements articulated to said levers, a pair of carriages movable with respect to the auxiliary body along a transverse direction perpendicular to said longitudinal axis, and a pair of slack adjusters each of which is disposed between a respective carriage and a respective thrust element, wherein the transmission mechanism comprises a floating member, which is free to pivot with respect to the service braking piston about an axis perpendicular to said longitudinal axis and to said transverse axis, wherein the floating member carries a first and a second pair of thrust bearings which cooperate with cam surfaces of said carriage.

A disc brake for railway vehicles comprising a pad and a disc on which the pad acts. The pad comprises a base plate and a plurality of friction elements fixed to the base plate. The friction elements comprise first friction elements made with a first friction material and second friction elements made with a second friction material. The first friction material has a compressibility modulus greater than that of the second friction material by a value greater than or equal to 1 MPa. The first friction elements are in a higher number than the second friction elements. A respective elastic element is interposed between each of the first friction elements and the base plate, whereas a respective rigid spacer is interposed between each of at least part of the second friction elements and the base plate.

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 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 device for reducing vibrations of a vehicle, in particular a rail vehicle, wherein the device includes at least a vehicle frame, a brake carrier, a mechanically operative brake unit and a suspension bracket that interconnects the vehicle frame and brake carrier, where the suspension bracket includes at least one element elastically connecting the vehicle frame to the brake carrier that allows movement of the brake carrier in the transverse direction of the vehicle frame in order to dampen vibrations.

A device for reducing vibrations of a vehicle, in particular a rail vehicle, wherein the device includes at least a vehicle frame, a brake carrier, a mechanically operative brake unit and a suspension bracket that interconnects the vehicle frame and brake carrier, where the suspension bracket includes at least one element elastically connecting the vehicle frame to the brake carrier that allows movement of the brake carrier in the transverse direction of the vehicle frame in order to dampen vibrations.

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.