The invention relates to a bar spacer (10) for a braked aircraft wheel, the bar being for fitting to a rim (1) of the wheel in order to drive the rotor disks of the brake in rotation, the spacer being for interposing between the bar and the rim, the spacer comprising two bearing blocks (11) connected together by a core (15) that is pierced to pass a screw for fastening the bar to the rim. According to the invention, the bearing blocks (11) of the spacer include voids defining a void fraction of at least 30% of the volume of the bearing blocks.

A method for determining a braking torque at at least one fixing interface between a brake caliper body and a brake caliper support includes inserting at least one washer device at the at least one fixing interface, the washer device having at least one fiber-optic strain sensor of fiber Bragg grating type, detecting, by the at least one fiber-optic strain sensor, local deformation and/or strain acting in a respective detecting position, and generating at least one respective photonic signal representative of the detected deformation and/or strain, receiving the at least one first photonic signal, by an optical reading/interrogation unit optically connected to the at least one fiber-optic strain sensor, generating at least one electric signal representative of the detected local deformation and/or strain, based on the received first photonic signal, and determining the braking torque based on the at least one electrical signal.

Example brake systems and apparatus for providing pitch control on bicycles are described herein. An example rear brake caliper described herein includes a caliper housing to be coupled to the bicycle. The caliper housing includes a first port to be fluidly coupled to a first fluid line fluidly coupled to a front brake actuator and a second port to be fluidly coupled to a second fluid line fluidly coupled to a front brake caliper. The rear brake caliper also includes a valve between the first port and the second port. The valve is operable to affect fluid flow between the first port and the second port.

A bracket for a brake assembly and a brake actuator includes a unitary body including a tube configured to receive a camshaft of the brake assembly and an actuator mounting arm disposed proximate a first end of the tube and configured to receive the brake actuator. In some embodiments, the tube includes one or more helical ribs formed on a radially inner surface. The bracket further includes either a brake spider or a brake spider mounting flange disposed proximate a second end of the tube. In either embodiment, material may be omitted in various locations to reduce the weight of the bracket. The bracket may be formed through an additive manufacturing process and in a manner that achieve at least one of a predetermined torsional stiffness and attenuation of a predetermined natural frequency.

A disc brake rotor comprises a hub engagement member, an outer member, and a coupling arm. The hub engagement member is configured to engage with a hub assembly. The outer member is provided radially outwardly of the hub engagement member with respect to a rotational axis of the disc brake rotor. The coupling arm extends radially outwardly from the hub engagement member to the outer member. The coupling arm includes a first axial surface provided on a first axial side in an axial direction with respect to the rotational axis and a second axial surface provided on a second axial side reverse to the first axial side in the axial direction. At least one of the first axial surface and the second axial surface is non-parallel to a reference plane perpendicular to the rotational axis as viewed in a radial direction with respect to the rotational axis.

A spring applied hydraulic released brake includes a brake housing including a pair of stator assemblies, a pair of piston-spring assemblies, each of the piston-spring assemblies including a piston assembly, a spring assembly adapted to apply spring force to the piston assembly to thereby engage the piston assembly with a first stator assembly of the pair of stator assemblies in a default position of the brake, and an end cap adjuster providing an opposing surface against which the spring assembly is biased, the end cap adjuster including a body portion having an end cap threading therearound generally corresponding with a housing threading within the brake housing.

A brake system that includes a fixed brake system, a sliding brake system, and a support structure. The fixed brake system has an inboard side and an outboard side and being operable to move an inboard brake pad and/or an outboard brake pad against a brake rotor to generate a first clamping force. The sliding brake system being operable to move relative to the fixed brake system and to move the inboard brake pad and/or the outboard brake pad against the brake rotor to generate a second damping force. The support structure providing a sliding contact between the sliding brake system and the fixed brake system during movement of the sliding brake system relative to the fixed brake while generating or releasing the second clamping force. The support structure is located in a region of the outboard side of the fixed brake system.

A friction pad mounted on a disk brake includes a back plate, and a lining attached to the back plate and configured to frictionally contact a disk. A spring member, configured to bias the friction pad toward a disk rotationally exiting side, is provided to an ear portion of the back plate. The spring member includes an attachment portion attached to the back plate, an extension portion extending from an end portion of the attachment portion, and an abutment portion folded back from the extension portion and extending in a direction toward the disk. The abutment portion is configured to receive a reaction force from a torque reception surface by abutting against the torque reception surface at a position on an opposite side of the ear portion from the disk when the ear portion and the torque reception surface of a mount member abut against each other.

The present application relate to a follow-up mechanism and a brake caliper unit for gauge-changeable bogie, the follow-up mechanism includes a follow-up connector, unlocking members that are located on two sides of the follow-up connector and movably connected to the follow-up connector, a transverse displacement recognition device movably connected to the unlocking members, a toothed locking and positioning device mounted on the follow-up connector, and at least two mutually parallel fixation members; the follow-up connector is in sliding fit with the fixation members, and sliders are fixedly connected at ends of the unlocking members; the toothed locking and positioning device is movably connected to the transverse displacement recognition device and fixation members, respectively; the brake caliper unit comprises a mounting bracket, the follow-up mechanism, and a brake actuator mounted on the mounting bracket, the follow-up mechanism is installed in cooperation with the brake actuator, and the fixation members are fixedly mounted on the mounting bracket. The present application can automatically recognize the orbit change of a train, the follow-up mechanism moves with a wheel by means of its stored elastic force and the unlocking members, and can self-locked at the target gauge position, thus realizing the change in position.

A hydraulic caliper assembly includes a caliper brake housing including two opposing pairs of two piston assemblies, each of the pairs of two piston assemblies adapted to place a respective stator assembly of a pair of stator assemblies in a braking position, where the caliper brake housing is a unitary, cast component having an internal fluid porting system fluidly coupling each of the piston assemblies with a source of hydraulic fluid, and where each of the piston assemblies have a common configuration.