A friction brake body for a friction brake of a motor vehicle, in particular a brake disk, includes a base body made in particular from gray cast iron and having at least one wear resistant layer formed on a friction contact surface of the base body. The wear resistant layer is made from ferritic-austenitic steel and includes an incorporated hard material particle, in particular finely distributed hard material particle.

In some examples, a brake disc assembly including a single continuous core portion defining a core of the brake disc assembly; and a friction portion adjacent the core portion. The friction portion defines the friction surface of the brake disc assembly during a braking operation. The friction portion includes a carbon composite material. The core portion includes a core material that is not a carbon composite material, and the core portion is configured as a heat sink for the brake disc assembly for heat generated during the braking operation.

A brake disk may comprise a friction disk formed of at least one of a carbon fiber-ceramic matrix composite material or a carbon fiber-carbon matrix composite material. A first surface of the friction disk defines a first recess. A first ceramic insert comprising ceramic powder may be located in the first recess.

A brake rotor assembly is provided. The brake rotor assembly includes a brake rotor portion formed from a first material. A tone ring formed from a second material is coupled to the brake rotor portion. The tone ring is formed by an additive manufacturing process. The brake rotor portion may be cast from an iron or iron alloy. The tone ring is formed by an additive manufacturing, or 3D printing, process machine from a second material that is corrosion resistive, such as, for example, stainless steel.

A fiber preform defining an annulus extending along a central longitudinal axis. The fiber preform includes a plurality of layers extending in an axial direction and a circumferential direction relative to the longitudinal axis. Each layer of the plurality of layers includes a plurality of elongate fibers. The plurality of elongate fibers include a plurality of elongate axial fibers extending substantially in the axial direction and a plurality of elongate circumferential fibers extending substantially in the circumferential direction. The fiber preform also includes a plurality of radial fibers extending substantially in the radial direction. The plurality of radial fibers mechanically bind one or more adjacent layers of the plurality of layers. At least 40% of the plurality of elongate fibers extend substantially in the axial direction.

Disclosed herein is an electromagnetic brake system. The electromagnetic brake system includes a brake disc configured to be rotated together with a drive shaft of a drive motor configured to operate a vehicle wheel, an armature disc configured to be movable so as to be in close contact with or so as to be separated from one side of the brake disc, an elastic member configured to elastically press the armature disc to the one side of the brake disc to a direction in which the armature disc is in close contact with the brake disc, and an inductor configured to separate the armature disc from the brake disc by an electrical signal. The brake disc includes a tube portion mounted on the drive shaft, and a plate portion provided to extend in an outward direction of the tube portion to be opposite to the armature disc. The tube portion and the plate portion are provided as a single member in which the tube portion and the plate portion are integrally formed with each other.

A braking arrangement includes a torque plate, a torque button, and a sacrificial bushing. The torque button comprises a head portion and a shaft portion, wherein the head portion is configured to extend at least partially into a torque pocket of an end plate of a brake stack and the shaft portion is configured to extend through an aperture disposed in a back leg of the torque plate. The bushing is configured to be removably coupled between the shaft portion of the torque button and the back leg of the torque plate.

A disc has a braking band, a bell and elastic elements. The braking band has a plurality of radial teeth projecting from a radially internal edge portion, delimiting a plurality of band seats. Each radial tooth has a radially internal edge surface, a first and a second axial tooth side, and at least one circumferential side. A plurality of axial teeth project delimiting a plurality of bell seats. The plurality of radial teeth is housed in the plurality of bell seats. The internal bell surface is aligned with the radially internal edge surface of each radial tooth. Each elastic element is removably connected to the axial teeth and embraces a portion of first and second axial tooth sides and of circumferential side of the radial teeth of the braking band, elastically preloading the radial teeth with respect to the bell.

A brake drum for a vehicle includes a friction ring and a drum body. The friction ring has grooves arranged on a radial outer surface along a circumference, and a coating formed on the grooves. The drum body is cast onto the radial outer surface of the friction ring so that the grooves are filled with a material of the drum body. The grooves include first grooves and second grooves. A first axial segment is formed at the friction ring in which the first grooves are introduced so that the first grooves are inclined relative to a first axial end of the friction ring. A second axial segment is formed at the friction ring in which the second grooves are introduced so that the second grooves are inclined in a direction which is opposite to that of the first axial segment. Each of the grooves have undercuts.

A wear monitoring device of a disk brake includes a brake disk, a first brake lining on a first face of the brake disk, and a second brake lining on a second face of the brake disk, in particular for commercial vehicles. The wear monitoring device has a first sensor unit that quantitatively ascertains the cumulative wear of the first and second brake linings. The wear monitoring device outputs, at the output connection of the first sensor unit, a first electrical output signal that is associated with the cumulative wear. A signal line is connected on the one hand to the output connection of the first sensor unit and on the other hand to an evaluating unit. The signal line is arranged in such a manner that, when a predetermined first wear limit of the first or second brake lining is reached, the signal line comes into contact with a stop.