This brake pad assembly (1) for disk brakes, in particular in rail vehicles, comprises a main plate (2), pad modules (3) attached to the plate, which have a friction lining (9) and a backing plate (10), means (16) for attaching a respective pad module (3) to the plate (2), a plurality of bushes (7), each attachment means being arranged in a respective bush (7), which is inserted into orifices (11,6) provided facing each other in the backing plate (10) and in the main plate (2), through an opening (8) in the friction lining (9). According to the invention, the orifice for receiving the bush in the main plate is a blind hole (6), a bore (15) with a smaller diameter than that of the blind hole (6) being provided in the bottom of said blind hole, said bore (15) passing through the main plate (2), a rivet (16) being inserted into said bore inside the bush (7), said rivet linking the main plate (2) and the backing plate (10). The present invention therefore makes it possible to produce a brake pad assembly in which the link between the pad module and the main plate has a structure that is as simple as possible, while being reliable.

This brake pad assembly (1) for disk brakes, in particular in rail vehicles, comprises a main plate (2), pad modules (3) attached to the plate, which have a friction lining (9) and a backing plate (10), means (16) for attaching a respective pad module (3) to the plate (2), a plurality of bushes (7), each attachment means being arranged in a respective bush (7), which is inserted into orifices (11,6) provided facing each other in the backing plate (10) and in the main plate (2), through an opening (8) in the friction lining (9). According to the invention, the orifice for receiving the bush in the main plate is a blind hole (6), a bore (15) with a smaller diameter than that of the blind hole (6) being provided in the bottom of said blind hole, said bore (15) passing through the main plate (2), a rivet (16) being inserted into said bore inside the bush (7), said rivet linking the main plate (2) and the backing plate (10). The present invention therefore makes it possible to produce a brake pad assembly in which the link between the pad module and the main plate has a structure that is as simple as possible, while being reliable.

Disclosed is a railway braking system including a service brake supplied by a first source, a parking brake having a device for immobilizing the service brake and a mobile control device for mobile control of the immobilizing device, and a command and control unit configured to receive information indicative of a value of the first source, process information indicative of a parking brake setpoint so as to actuate the control device, and determine a value of a second source according to the setpoint and to the information indicative of a value of the first source, so as to supply a pressure chamber of the service brake.

Disclosed is a railway braking system including a service brake supplied by a first source, a parking brake having a device for immobilizing the service brake and a mobile control device for mobile control of the immobilizing device, and a command and control unit configured to receive information indicative of a value of the first source, process information indicative of a parking brake setpoint so as to actuate the control device, and determine a value of a second source according to the setpoint and to the information indicative of a value of the first source, so as to supply a pressure chamber of the service brake.

A braking device of lever type, wherein actuation means is realized in the form of a screw jack (19) comprising an electric motor (20) and an angle gear (21) driving a jack screw (22) which is coupled between the levers (2; 5). A load sensor (29) coupled to one lever controls, via a power regulating means (25), the force applied in braking mode. A position sensor (31) coupled to the other lever determines the lever's positions in idling mode.

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 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 disc brake device includes a rotary member, a brake disc, and a control member. The brake disc includes a disc body having an annular shape and fins. The control member controls an airflow rate between the fins disposed adjacent to each other in a circumferential direction of the brake disc. The control member includes a base plate and a protruding portion. The protruding portion protrudes from the base plate toward the disc body. A top surface of each fin has a recessed portion. The protruding portion extends in the circumferential direction through from the recessed portion of one of the fins disposed adjacent to each other to the recessed portion of the other of the fins.

In a friction pad assembly for a disc brake, a plurality of lining assemblies supported on a guide plate are pressed to a disc rotor. The lining assembly includes a friction material and a back plate portion. A plate fitting portion of the lining assembly is inserted and equipped to a guide hole portion, and braking torque is transmitted from the plate fitting portion to the guide plate. A plurality of link plates applying pressing force from a torque receiving plate to the lining assembly are provided between the torque receiving plate and the back plate portion adhered to the guide plate. A damping layer sandwiched between inner surfaces of the torque receiving plate is provided on back surface sides of the link plates.

A system for retarding the speed of a railcar comprises a brake; a hydraulic actuator moving the brake between a closed position in which the brake applies braking pressure on the wheel of a railcar, and an open position in which the brake does not apply braking pressure on the wheel of the railcar; a hydraulic circuit provided with a pump arrangement for supplying hydraulic fluid to the hydraulic actuator; and a control circuit coupled to the hydraulic circuit for controlling the flow of hydraulic fluid to move the brake between the closed and open positions.