A parking brake unit of a brake device for braking a wheel includes a first piston having a first engaging part on an inner circumference thereof, the first piston being configured to move in first direction by pressure of the hydraulic fluid supplied to a pressure chamber defined in the back thereof, a first biasing member configured to bias the first piston in second direction, opposite to the first direction, a second piston slidably provided on the inner circumference of the first piston, the second piston having a second engaging part on an outer circumference thereof, and an engaging member configured to cause the first engaging part and the second engaging part to engage with each other, in which the second piston causes a brake lining to move in direction bringing the wheel to be in a braking state, when the first piston moves in the second direction.
Parking brake unit
2019-04-16
Patent
Electronic Resource
English
IPC: | F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / B61H Bremsen oder andere Verzögerungseinrichtungen ausgebildet für Schienenfahrzeuge , BRAKES OR OTHER RETARDING APPARATUS PECULIAR TO RAIL VEHICLES |
Parking cylinder, parking brake unit, brake clamp unit, brake system and vehicle
European Patent Office | 2020
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