Caliper with internal motor
AssigneeDelphi Technologies, Inc.
InventorsDavid B. Drennen, Ernest R. Siler, Gary C. Fulks, Douglas E. Poole
Life of this patent
Estimating the term…
Abstract
A brake caliper comprises a motor having a shaft, at least one first planetary gear, and at least one second planetary gear. The at least one first planetary gear is rotatably engaged with the shaft and with a piston, and is operatively engaged with a first carrier. The at least one second planetary gear is operatively engaged with the first stage carrier and with a second carrier. A ball screw is engaged with the second stage carrier for rotation therewith, and a ball screw nut is operatively engaged with the ball screw. A parking brake for the caliper is also provided.
Claims14
A brake caliper comprising:
- a housing having a bore;
- a piston disposed in the bore;
- a motor having a shaft;
- at least one first planetary gear rotatably engaged with the shaft and with the piston, the at least one first planetary gear being operatively engaged with a first carrier;
- at least one second planetary gear operatively engaged with the first stage carrier, the at least one second planetary gear being operatively engaged with a second carrier;
- a ball screw engaged with the second stage carrier for rotation therewith;
- and
- a ball screw nut operatively engaged with the ball screw.
An electric brake caliper for a motor vehicle, the electric brake caliper comprising:
- a housing having a bore;
- a piston disposed in the bore;
- an electric motor having a shaft extending into the piston;
- at least one first planetary gear rotatably engaged with the shaft and with the piston, the at least one first planetary gear being operatively engaged with a first carrier;
- at least one second planetary gear operatively engaged with the first stage carrier, the at least one second planetary gear being operatively engaged with a second carrier;
- a ball screw engaged with the second stage carrier for rotation therewith;
- and
- a ball screw nut operatively engaged with the ball screw.
A parking brake for an electric caliper having a motor shaft, the electric caliper comprising:
- a pulley mounted proximate an end of the motor shaft, the pulley having a plurality of teeth;
- a park brake lever movable between an unapplied position and an applied position;
- a magnet for holding the park brake lever in the unapplied position;
- and
- a solenoid for moving the park brake lever to the applied position, the park brake lever in the applied position engaging the teeth of the pulley.
Dependencies are inferred from the claim text.