Electromechanical brake caliper for motor vehicle, has grooves inclined with respect to displacement axis of ball nut, which coincides with rotational axis of ball screw so as to produce variable demultiplication

摘要

#CMT# #/CMT# The caliper has an electric motor (17) driving a ball screw (19) engaged in a ball nut (16) pushing a piston (21) to displace the piston in translation. The nut is guided in displacement with respect to a bush (23) using two rollers (24) cooperating with two complementary grooves (26). The grooves are inclined with respect to a displacement axis of the nut, which coincides with a rotational axis (AX) of the screw (19) so as to produce a variable demultiplication. #CMT#USE : #/CMT# Used for motor vehicle. #CMT#ADVANTAGE : #/CMT# The grooves are inclined with respect to the displacement axis of the ball nut, which coincides with the rotational axis of the ball screw so as to produce a variable demultiplication, thus permitting to increase the locking force without increasing the size of the motor and without reducing the response time of braking, while permitting to minimize the energy consumption of the brake caliper. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic sectional view of an electromechanical brake caliper. AX : Rotational axis 16 : Ball nut 17 : Electric motor 19 : Ball screw 21 : Piston 23 : Bush 24 : Rollers 26 : Complementary grooves.