US 12,228,179 B2
Drum brake
Uwe Bach, Niedernhausen (DE); Christian Vey, Frankfurt am Main (DE); Ahmed Sefo, Frankfurt am Main (DE); and Jens Hoffmann, Darmstadt (DE)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Appl. No. 17/415,226
Filed by Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
PCT Filed Dec. 17, 2019, PCT No. PCT/EP2019/085535
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/127189, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 10 2018 222 125.1 (DE), filed on Dec. 18, 2018.
Prior Publication US 2022/0065310 A1, Mar. 3, 2022
Int. Cl. F16D 51/20 (2006.01); F16D 66/00 (2006.01); B60T 8/171 (2006.01)
CPC F16D 51/20 (2013.01) [F16D 66/00 (2013.01); B60T 8/171 (2013.01); F16D 2066/005 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A drum brake of servo construction comprising:
a brake drum;
two brake shoes, which can be applied to the brake drum, each having a pressure end and a supporting end;
a spreader device between the pressure ends of the brake shoes, which is mounted to float relative to a carrier plate and is supported in force introduction points at the pressure ends to introduce force into the pressure ends;
a ram located between the supporting ends, which is mounted to float relative to the carrier plate and is supported on the supporting ends in order to transmit force;
a pressure head at the pressure end on each brake shoe adjacent to the force introduction point, wherein the pressure heads can be supported on an abutment arranged therebetween and connected to the carrier plate, wherein the abutment is deformed elastically under load;
at least one sensor which detects deformation of the abutment that arises under load to enable the braking torque produced in the drum brake to be determined with a sensor signal;
wherein the abutment is formed by a base, which ends via a central web at a pedestal connected to the carrier plate, wherein the pressure heads rest against opposite edges of the base, wherein the base is carried by the central web starting from the pedestal secured on the carrier plate and adjoining the inner edge of the base, wherein arms are oriented toward the carrier plate; and
a plurality of pins projecting laterally from the central web reach the inner edges of the arms, forming a measurement gap.