US 12,227,153 B2
Hydraulic and electromechanical service and parking disc brake
Paolo Sala, Bergamo (IT); Martina Truffello, Bergamo (IT); and Corrado Manzoni, Bergamo (IT)
Assigned to Brembo S.p.A., Bergamo (IT)
Appl. No. 17/631,513
Filed by Brembo S.p.A., Bergamo (IT)
PCT Filed Jul. 23, 2020, PCT No. PCT/IB2020/056934
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/019380, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 102019000013512 (IT), filed on Jul. 31, 2019.
Prior Publication US 2022/0266808 A1, Aug. 25, 2022
Int. Cl. F16D 65/18 (2006.01); B60T 13/58 (2006.01); B60T 13/66 (2006.01); B60T 13/74 (2006.01); F16D 55/228 (2006.01); F16D 121/04 (2012.01); F16D 121/24 (2012.01); F16D 123/00 (2012.01); F16D 125/08 (2012.01); F16D 125/40 (2012.01); F16D 125/50 (2012.01); F16D 125/52 (2012.01)
CPC B60T 13/66 (2013.01) [B60T 13/588 (2013.01); B60T 13/746 (2013.01); F16D 55/228 (2013.01); F16D 65/18 (2013.01); F16D 2121/04 (2013.01); F16D 2121/24 (2013.01); F16D 2123/00 (2013.01); F16D 2125/08 (2013.01); F16D 2125/40 (2013.01); F16D 2125/50 (2013.01); F16D 2125/52 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A hydraulic and electromechanical service and parking disc brake, comprising:
a caliper with two side walls which delimit a disc space therebetween for accommodating a portion of a brake disc,
a device for fastening the caliper to a suspension of a vehicle,
at least two pads each supported by one of the side walls, respectively,
a service braking system, having a hydraulic actuator positioned in one of the side walls,
wherein the hydraulic actuator comprises a hydraulic cylinder formed in the side wall and a piston accommodated in the hydraulic cylinder and having a free end facing one of the at least two pads,
wherein said one of the at least two pads is supported by the same side wall in which the hydraulic actuator is positioned,
wherein the hydraulic cylinder is in communication with a system for feeding and pressurizing a hydraulic fluid for applying a hydraulic pressure to the piston and causing the piston to translate in an actuating direction towards the brake disc and tighten the pad against the brake disc,
a parking braking system having an electromechanical actuator positioned at one of the side walls,
wherein the electromechanical actuator comprises:
a screw-nut assembly having a rotary member and a translational member and configured to convert a rotary motion of the rotary member into a translational motion of the translational member,
wherein the screw-nut assembly is connected in the hydraulic cylinder so as to be able to translate and tighten the translational member in the actuating direction against the piston in order to lock the piston,
an electric motor connected to a power supply to actuate the screw-nut assembly, a transmission mechanism connected between the electric motor and the rotary member,
wherein said at least one electromechanical actuator is self-locking due to transmission irreversibility thereof so that, when the electric motor is off, a translational stress of the translational member cannot cause the translational member to move away from the brake disc,
a control system connected to the service braking system and to the parking system and to a user interface,
wherein the translational member is restrained to be rotationally locked with respect to the caliper via an anti-rotation shape coupling with a guide portion which is fixed with the caliper and is arranged on a rear side of the translational member, opposite to the free end of the piston.