A multi-disk brake (1) for a motor vehicle has two multi-disk mechanisms (7, 8) and an actuation device (9) for brake actuation and/or brake release of the multi-disk mechanisms (7, 8), and an electric drive (16) for translational actuation (spreading) of the actuation device, such as, in particular, the ramp unit (9). During a spreading operation, the multi-disk mechanisms (7, 8) are pretensioned in a metered manner by the actuation device and produce a desired frictional engagement, and a correspondingly reversed activation of the actuating mechanism enables a correspondingly metered brake release. By means of the electric drive (16), the action of the multi-disk brake (1) can be metered overall in a particularly precise, sensitive and compensated manner in modern vehicle topology, including all peripheral brake components and systems, including recuperation.

A brake device for installation on an axle of wheels including a piston; a casing accommodating at least the piston; a container; a first cast iron disc and a second cast iron disc, joined to the container; a first brake lining; a first supporting disc on which the first brake lining is located; and a bearing fixed to the central cylindrical wall of the container around the axle. The container and the casing remain fixed without rotating about the axle and the first brake lining together with the first supporting disc are fixed to the axle. The piston is further configured to displace the container together with the two cast iron discs towards the first brake lining until the first cast iron disc makes contact with the first brake lining. The container includes an inner circuit configured to accommodate a coolant.

In some examples, a rotor drive key assembly configured to be positioned on a wheel includes an insert and a rotor drive key. The insert is configured to mate with a wheel boss of the wheel and mechanically connect the rotor drive key with the wheel boss. The rotor drive key is configured to mate with the insert such that the insert limits movement of the rotor drive key relative to the wheel boss in at least a radial direction of the wheel. In some examples, the rotor drive key includes a tab having a tab aperture configured to receive a fastener extending in an axial direction of the wheel and engaging the wheel boss.

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 brake disk defines an annular shape having a radially inner side and a radially outer side. The brake disk includes: a radially outer braking surface, the braking surface having a maximum operating temperature; a fusible material section radially inward from and connected to the braking surface. The fusible material has a maximum operating temperature, the fusible material section suitable for transmitting torque between the braking surface and a shaft. The maximum operating temperature of the braking surface is higher than the maximum operating temperature of the fusible material section. When the temperature of the fusible material section raises above the maximum operating temperature of the fusible material section, the fusible material section is configured to no longer transmit torque between the braking surface and the shaft.

A system, and associated method, for reducing oxidation of a friction disk may include a braking assembly comprising the friction disk and a coolant loop coupled to the braking assembly, with the coolant loop being configured to circulate liquid coolant from the braking assembly. That is, the coolant loop may be configured to reduce the temperature of the braking assembly, thus reducing the rate/extent of oxidation of the friction disks and potentially enabling the concentration of oxygen around the braking assembly to be reduced.

In some examples, an assembly includes a rotor drive key configured to fit around a wheel boss defined by a wheel. The rotor drive key includes a support structure. The assembly further includes a fastener configured to extend the wheel boss and the support structure in a substantially axial direction of the wheel when the rotor drive key fits around the wheel boss, where the fastener is configured to limit movement of the rotor drive key relative to the wheel boss. The fastener may be rotated to establish and/or increase a contact pressure between the fastener and the rotor drive key to help the fastener limit movement of the rotor drive key relative to the wheel boss.

An architecture that provides automatic monitoring of brake conditions making use of a wear pin on a brake. The disclosure makes use of the fact that a wear pin is required to be provided on an aircraft brake, by integrating monitoring functions such as displacement sensors and/or temperature sensors, into the pin. This means that the automatic monitoring components are not taking up more space on the brake than is already taken up by the compulsory wear pin.

The hydraulic machine comprises: —a fixed part, —a part mounted so as to rotate about an axis (O-O) with respect to the fixed part, —a stack (50) of discs (53, 54) forming a brake or clutch, the discs being able to be in abutment against one another by way of friction surfaces (88) having a mean friction radius (Rf) with respect to the axis, —a push rod (80) that is able to push the discs into abutment against one another, in a direction parallel to the axis, over a thrust surface (4), the thrust surface having a mean thrust radius (Rp) with respect to the axis which extends to within or beyond the mean friction radius (Rf). The push rod (80) has a radial annular notch (90) indenting the push rod from an opposite side of the push rod from the axis (O-O) when the mean thrust radius (Rp) extends beyond the mean friction radius (Rf), and otherwise from the side of the push rod closest to the axis.

In some examples, a drive insert comprises a clip and a retainer. The clip is configured to be slidable over a surface adjacent to a drive slot of a brake disc in a tangential direction of the brake disc. The retainer is configured to be slidable over the clip when the clip is positioned over the surface to secure the clip to the brake disc. In some examples, the clip may comprise a body section and first and second arms extending from the body section. The retainer may comprise first and second legs configured to contact the first arm and the second arm of the clip when the retainer is positioned over the clip. The first and second legs may be resiliently biased to provide an inward clamping force on the clip when the retainer is positioned over the clip.