US 12,234,875 B2
Spreader unit for a motor vehicle drum brake
Martin Gädke, Hofheim (DE); Holger von Hayn, Bad Vilbel (DE); Matthias Schulitz, Frankfurt am Main (DE); Ahmed Sefo, Frankfurt am Main (DE); Uwe Bach, Niedernhausen (DE); Adrian Messner, Mainz (DE); Wolfgang Ritter, Oberursel (DE); Jens Hoffmann, Darmstadt (DE); and Christian Vey, Frankfurt am Main (DE)
Assigned to Continental Automotive Technologies GmbH, Hannover (DE)
Appl. No. 17/616,742
Filed by Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
PCT Filed May 27, 2020, PCT No. PCT/EP2020/064683
§ 371(c)(1), (2) Date Dec. 6, 2021,
PCT Pub. No. WO2020/244991, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 10 2019 208 223.8 (DE), filed on Jun. 5, 2019.
Prior Publication US 2022/0333657 A1, Oct. 20, 2022
Int. Cl. F16D 65/22 (2006.01); B60T 1/06 (2006.01); F16D 51/20 (2006.01); F16D 65/56 (2006.01); F16D 67/02 (2006.01); F16D 121/24 (2012.01); F16D 125/36 (2012.01); F16D 125/40 (2012.01)
CPC F16D 65/22 (2013.01) [B60T 1/067 (2013.01); F16D 51/20 (2013.01); F16D 65/566 (2013.01); F16D 67/02 (2013.01); F16D 2121/24 (2013.01); F16D 2125/36 (2013.01); F16D 2125/40 (2013.01); F16D 2200/0004 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A spreader unit for a drum brake, comprising:
a housing;
a first and second brake shoe holders that are rotationally secured to the housing, and actuatable linearly along an axis, respectively away from one another in a spreading direction and respectively toward one another in a release direction;
a first and a second brake shoe provided respectively with a brake lining;
a readjustment device arranged between the actuating pistons, wherein the readjustment device changes the spacing of the actuating pistons in at least one readjustment step when an actuating travel of the first and second brake shoe holders has exceeded a travel setpoint value;
a thermally actuable blocking device mechanically prevents the execution of the readjustment step by the readjustment device at a temperature above a temperature setpoint value;
an electromechanical actuator comprising an electric motor to drive the spreader unit; and
an electric load measurement device acting one of directly and indirectly on the spreader unit.