| 摘要 |
The invention relates to a brake cylinder for pneumatic vehicle brakes, especially for utility vehicles. Said brake cylinder comprises a spring brake section for carrying out parking brake actions by means of a brake spring (109), and a service brake section for carrying out pneumatic service brake actions, the spring brake section and the service brake section being combined in one housing (101) to give a structural unit. The housing (101) is subdivided by a piston (104) into two compartments (106, 107) the one compartment (106) of the two being used as the pressure compartment for actuating the service brake section, and the brake spring (109) of the spring section being arranged in the other compartment (107) on the opposite end of the piston (104). The brake spring (109) acts upon an additional spring piston (110) in the compartment (107) which can be locked relative to the piston (104) by means of a pneumatic locking mechanism (116) and can be released therefrom by releasing the locking mechanism, said spring piston being connected to a piston rod (112) directly or via additional elements to actuate the vehicle brake. Once the locking mechanism (116) is released, the brake spring (109) is effective between the two pistons (104, 110) and displaces them relative each other during a parking brake action. The invention is characterized in that the locking mechanism is configured as a pneumatic coupling. |
