This invention relates to a bogie for a rail vehicle. The bogie comprises a chassis for mounting a pair of rail engaging rail wheels. A sub-chassis is mounted to the chassis for movement between raised and lowered positions. A hydraulic dump actuator is disposed between the chassis and the sub-chassis and configured to selectively hold the sub-chassis in the raised position against a weight force, when supplied with pressurised hydraulic fluid. At least one brake unit is mounted to the sub-chassis. The brake unit comprises a brake calliper assembly for at least partially receiving a head of the rail when the sub chassis is moved into the lowered position, and a bias means for biasing the brake unit toward an applied configuration in which the brake calliper assembly clamps the sides of the head of the rail in braking engagement. A hydraulic brake release actuator is configured to selectively hold the brake unit in a release configuration against an application force imposed by the bias means, thereby to allow rail insertion into the calliper assembly. The dump actuator and the brake release actuator are configured for operative connection to a brake activation controller for selectively activating bogie braking by discharging hydraulic fluid from the hydraulic dump actuator and hydraulic brake release actuator to dump the sub-chassis from the raised position to the lowered position, and thereby to allow the brake unit to transition from the release configuration to the applied configuration. Figure 2 Figure 2


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    Title :

    Rail vehicle braking system


    Contributors:

    Publication date :

    2019-08-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B61H Bremsen oder andere Verzögerungseinrichtungen ausgebildet für Schienenfahrzeuge , BRAKES OR OTHER RETARDING APPARATUS PECULIAR TO RAIL VEHICLES




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