초록 ▼

The present disclosure relates to a braking device having a service brake and a parking brake. The braking device includes a housing and a shaft that extends at least partially through the housing. The shaft is rotatable relative to the housing about a longitudinal axis. A stack of plates is spaced

The present disclosure relates to a braking device having a service brake and a parking brake. The braking device includes a housing and a shaft that extends at least partially through the housing. The shaft is rotatable relative to the housing about a longitudinal axis. A stack of plates is spaced axially along the shaft. At least one of the plates is adapted to rotate in concert with the shaft. The stack of plates includes a first axial end positioned opposite from a second axial end. A spring structure is provided for compressing the stack of plates together to provide the parking brake. The spring structure is mounted at the first axial end of the stack of plates. The braking device also includes a first piston for releasing the parking brake, and a second piston for actuating the service brake. The second piston actuates the service brake. The second piston is mounted at the second axial end of the stack of plates. When actuated, the second piston forces the plates axially toward the spring assembly such that the plates are compressed together to provide the service brake.

대표청구항 ▼

1. A braking device having service brake and a parking brake, the braking device comprising:a housing including at least a one-piece pressure plate and a cover, the one-piece pressure plate and the cover being arranged in opposition with respect to one another, the one-piece pressure plate defining

1. A braking device having service brake and a parking brake, the braking device comprising:a housing including at least a one-piece pressure plate and a cover, the one-piece pressure plate and the cover being arranged in opposition with respect to one another, the one-piece pressure plate defining first and second piston chambers; a shaft that extends at least partially through the housing, the shaft being rotatable relative to the housing about a longitudinal axis; a rotor plate mounted on the shaft, the rotor plate being adapted to rotate in concert with the shaft about the longitudinal axis; a first stator plate positioned between the rotor plate and the one-piece pressure plate; a second stator plate including a plate portion positioned between the cover and the rotor plate; a spring structure mounted between the cover and the second stator plate, the spring structure being arranged and configured to bias the second stator plate against the rotor plate to provide the parking brake; a first piston for releasing the parking brake by forcing the second stator plate away from the rotor plate with sufficient force to overcome the bias of the spring structure, the first piston being mounted within the first piston chamber; and a second piston for actuating the service brake by forcing the first stator plate axially toward the spring structure and against the rotor plate, the second piston being mounted within the second piston chamber.