A brake disc for a railway vehicle is provided in which noise arising from the brake disc during high-speed rotation of a wheel is reduced by a large margin. A brake disc for a railway vehicle includes: a disc plate portion that has a sliding portion on a front face thereof; a plurality of through-holes that pass from the front face to a rear face of the disc plate portion and are arranged in alignment in the circumferential direction of the disc plate portion, the through-holes allowing bolts to pass therethrough for fastening together the disc plate portion and a wheel of the railway vehicle; and a groove provided to link a plurality of through-holes on the front face side of the disc plate portion.

A microcomputer-controlled electromechanical braking system comprises an electromechanical braking control device (1) and an electromechanical braking unit (5); the electromechanical braking control device (1) comprises a braking microcomputer control unit (2), an electromechanical control unit (3) and a standby power supply module (4); the braking microcomputer control unit (2) receives a braking instruction signal sent by a driver or an automatic driving system, performs the calculation of a target braking force and braking management, and at the same time, can communicate with braking microcomputer control units (2) of other vehicles in a train group.

A microcomputer-controlled electromechanical braking system comprises an electromechanical braking control device (1) and an electromechanical braking unit (5); the electromechanical braking control device (1) comprises a braking microcomputer control unit (2), an electromechanical control unit (3) and a standby power supply module (4); the braking microcomputer control unit (2) receives a braking instruction signal sent by a driver or an automatic driving system, performs the calculation of a target braking force and braking management, and at the same time, can communicate with braking microcomputer control units (2) of other vehicles in a train group.

A mechanical motor-driven friction brake device for a rail vehicle consists of a torque motor, an electromagnetic brake (5), a screw nut transmission mechanism, and a brake friction pair (6), the torque motor and a screw (4) being coaxially mounted, the screw (4) being in non-self-locking threaded connection with a nut (3), and one end of the nut (3) being connected to the brake friction pair (6); the device drives, by means of the torque motor, the screw (4) to rotate so as to drive the nut (3) to perform linear motion and outputs a pressure or a pulling force to the brake friction pair (6), so as to brake or release the rail vehicle; in addition, this device can lock the screw by means of the electromagnetic brake (5), realizing the function of parking brake.

A mechanical motor-driven friction brake device for a rail vehicle consists of a torque motor, an electromagnetic brake (5), a screw nut transmission mechanism, and a brake friction pair (6), the torque motor and a screw (4) being coaxially mounted, the screw (4) being in non-self-locking threaded connection with a nut (3), and one end of the nut (3) being connected to the brake friction pair (6); the device drives, by means of the torque motor, the screw (4) to rotate so as to drive the nut (3) to perform linear motion and outputs a pressure or a pulling force to the brake friction pair (6), so as to brake or release the rail vehicle; in addition, this device can lock the screw by means of the electromagnetic brake (5), realizing the function of parking brake.

A brake device includes: an extendable and contractable coupling member that couples one end portions of a pair of link arms to each other; and an adjuster that causes the coupling member to extend so that positions of brake linings relative to brake discs are adjusted to be constant. The adjuster includes: an extension mechanism that has an extension shaft with a male thread and an extension nut with a female thread, which is threadedly engaged with the male thread, and causes the coupling member to extend; and a pressing spring that presses the extension nut in an axial direction toward a contact surface, which is provided in a main body recess portion housing the extension nut and is in contact with one end portion of the extension nut.

A brake device includes: an extendable and contractable coupling member that couples one end portions of a pair of link arms to each other; and an adjuster that causes the coupling member to extend so that positions of brake linings relative to brake discs are adjusted to be constant. The adjuster includes: an extension mechanism that has an extension shaft with a male thread and an extension nut with a female thread, which is threadedly engaged with the male thread, and causes the coupling member to extend; and a pressing spring that presses the extension nut in an axial direction toward a contact surface, which is provided in a main body recess portion housing the extension nut and is in contact with one end portion of the extension nut.

A brake lining includes friction structures, back boards fastened to respective the friction structures, a base plate supporting the friction structures. Each of the friction structures includes two adjacent friction portions with a groove formed in the front surface in between, and a thin portion with a smaller thickness than thicknesses of the friction portions, the thin portion located in a position corresponding to the groove. Each of the friction structures is supported by the base plate on two support points located in the two friction portions respectively. The thin portion has a constant length, the length being equal to a maximum width of the friction portions and satisfying a condition that L/D is equal to or greater than 1.1, where D denotes the length of the thin portion and L denotes a distance between the two support points located in the friction portions.

A brake lining includes friction structures, back boards fastened to respective the friction structures, a base plate supporting the friction structures. Each of the friction structures includes two adjacent friction portions with a groove formed in the front surface in between, and a thin portion with a smaller thickness than thicknesses of the friction portions, the thin portion located in a position corresponding to the groove. Each of the friction structures is supported by the base plate on two support points located in the two friction portions respectively. The thin portion has a constant length, the length being equal to a maximum width of the friction portions and satisfying a condition that L/D is equal to or greater than 1.1, where D denotes the length of the thin portion and L denotes a distance between the two support points located in the friction portions.

In order to provide a development of friction ring elements for a friction ring set for arranging on the wheel web of a track wheel in order to form a track wheel brake, wherein the friction ring elements can be simply and cost-effectively produced and can be easily fitted with linking elements, a friction ring element (10) is proposed for a friction ring set (200) for arranging on the wheel web (2) of a track wheel (1) for a railway vehicle in order to form a track wheel brake (100), wherein the friction ring element (10) has a friction ring (11) and multiple linking elements (12, 13) designed as separate components and arranged on the friction ring (11), and wherein at least some of the linking elements (12, 13) are force-lockingly connected to the friction ring (11).