An aerodynamic noise reduction member 30 includes: a plate-like support portion 32 sandwiched between a plurality of fins 24 and 26 of a brake disk 20 and a rotating member 102 of a railroad vehicle; and a plurality of protruding portions 34 protruding from the support portion 32. Each of the plurality of protruding portions 34 is provided in such a manner that, in a state in which the support portion 32 is sandwiched between the plurality of fins 24 and 26 and the rotating member 102, each of the protruding portions 34 partially occludes between the fastening fin 24 and the anchoring fin 26 adjacent to each other in a circumferential direction of the brake disk 20.

An aerodynamic noise reduction member 30 includes: a plate-like support portion 32 sandwiched between a plurality of fins 24 and 26 of a brake disk 20 and a rotating member 102 of a railroad vehicle; and a plurality of protruding portions 34 protruding from the support portion 32. Each of the plurality of protruding portions 34 is provided in such a manner that, in a state in which the support portion 32 is sandwiched between the plurality of fins 24 and 26 and the rotating member 102, each of the protruding portions 34 partially occludes between the fastening fin 24 and the anchoring fin 26 adjacent to each other in a circumferential direction of the brake disk 20.

A rail vehicle braking system includes at least one disk brake associated with a wheel or a wheel set, wherein the disk brake includes at least one brake disk, at least one brake lining which engages with the brake disk, at least one application device exerting an application force on the at least one brake lining during a braking operation, and a control device for controlling the application device, wherein the control device is coupled to a determination unit for determining a current wheel diameter of the wheel or of the wheel set, wherein the control unit is configured such that, when a predetermined application force is actuated during braking operation, a value of the current wheel diameter detected by the determination unit is taken into account.

A rail vehicle braking system includes at least one disk brake associated with a wheel or a wheel set, wherein the disk brake includes at least one brake disk, at least one brake lining which engages with the brake disk, at least one application device exerting an application force on the at least one brake lining during a braking operation, and a control device for controlling the application device, wherein the control device is coupled to a determination unit for determining a current wheel diameter of the wheel or of the wheel set, wherein the control unit is configured such that, when a predetermined application force is actuated during braking operation, a value of the current wheel diameter detected by the determination unit is taken into account.

A disc brake (11) includes: a floating caliper (13) including a base portion (25) slidably supported by an upper guide pin (31) supported by a support (23), a piston side pressing arm (39) and an opposite piston side pressing arm (41); a pair of brake pads (17); a drive piston (15) provided on the piston side pressing arm (39); a caliper return mechanism (22) for elastically biasing the base portion disposed on an end portion of the guide pin (31) to the side opposite to the drive piston side; and an inner circumferential side washer (44) disposed on both sides in an axial direction of the rubber ring (21) elastically supporting the upper guide pin (31) in a radial direction to restrict an inner circumferential portion of the rubber ring (21) from bending deformation along an axial direction of the upper guide pin (31).

Disclosed is a brake system for a railroad vehicle, including a parking brake provided with a piston and having a first configuration in which the piston is in a working position in which it acts on a lining support and applies a predetermined force to a brake disc; a second configuration in which the piston is in a rest position in which it does not act on the support and does not apply any force to the disc; and a third configuration in which, when the vehicle is not at a standstill and the ambient temperature in the environment of the disc is greater than a threshold value, it forces the piston to move towards a trip position different from its working and rest positions, in order to limit or cancel the force applied to the disc.

Disclosed is a brake system for a railroad vehicle, including a parking brake provided with a piston and having a first configuration in which the piston is in a working position in which it acts on a lining support and applies a predetermined force to a brake disc; a second configuration in which the piston is in a rest position in which it does not act on the support and does not apply any force to the disc; and a third configuration in which, when the vehicle is not at a standstill and the ambient temperature in the environment of the disc is greater than a threshold value, it forces the piston to move towards a trip position different from its working and rest positions, in order to limit or cancel the force applied to the disc.

The present invention relates to a bogie structure for a mountain railway car. The bogie structure is configured as follows: a traction motor for driving an axle of mountain railway car is installed on a car body to simplify the bogie structure and to minimized interference between the traction motor and other components constituting the bogie, and a first and a second bearing are respectively inserted and installed between a first and a second axle and a first and a second wheel, so that a first and a second wheel located in one side close to a turning center are rotated less than a first and a second wheel located in the other side opposite thereof and a traveling distance of the wheels located in the turning-centered side is generated corresponding to a length of a turning-centered side railway, whereby the mountain railway car is improved in traveling stability.

The bogie for a railway vehicle comprises a chassis; an axle mounted rotatably relative to the chassis around a transverse rotation axis, at least one wheel being mounted on each of the transverse end parts of said axle, a braking system comprising three brake discs mounted around the axle, arranged in the space defined between the wheels, and three brake forks acting on a brake disc, comprising a pair of arms extending between first and second ends, the second ends each bearing a brake pad forming a pair of brake pads, each of the pairs of brake pads being positioned around part of a brake disc, and two successive pairs of brake pads extending on either side of the rotation axis. The first ends of the arms all extend on a same side of the rotation axis.

The bogie for a railway vehicle comprises a chassis; an axle mounted rotatably relative to the chassis around a transverse rotation axis, at least one wheel being mounted on each of the transverse end parts of said axle, a braking system comprising three brake discs mounted around the axle, arranged in the space defined between the wheels, and three brake forks acting on a brake disc, comprising a pair of arms extending between first and second ends, the second ends each bearing a brake pad forming a pair of brake pads, each of the pairs of brake pads being positioned around part of a brake disc, and two successive pairs of brake pads extending on either side of the rotation axis. The first ends of the arms all extend on a same side of the rotation axis.