Drum brake having compensation of brake-shoe transverse offset
A drum brake for an electrical motor vehicle brake system wherein actuator means, a transmission means and a spreading device are in a force flow with movably mounted drum brake shoes that are suitable and designed to cooperate with a brake drum. The force flow, in a electromechanically actuatable drum brake such that closed-loop electrical brake control in conjunction with simple actuator control is made possible with reduced outlay over the entire wearing service life of the brake shoe. Transverse offset compensation is provided by way of, a joint-disk-type/joint-socket-type bearing geometry such that a friction lining bearing support geometry with profiling allowing mutual articulation such that transversely oriented lining displacement with respect to the a direction is at least reduced.
1 . A drum brake for a motor vehicle brake system comprising:
at least one of an actuator, a transmission device, an abutment, and a spreading device including an actuating element at least one of which are in a force flow, via support bearings, with movably mounted brake shoes cooperate with a brake drum;
a compensation device for brake shoe transverse offset is provided adjacent to one of the spreading device and the abutment, the transverse offset being an offset in a direction orthogonal to a spreading axis of the spreading device,
wherein the compensation device is incorporated laterally adjacent to at least one of the spreading device and the abutment into the force flow of the brake shoe of the drum brake.
2 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the compensation device is positioned in a brake drum interior space.
3 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the compensation device is incorporated in form-fitting fashion directly into an interface between one of the abutment and the brake shoe and the actuating element and the brake shoe.
4 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the compensation device is incorporated in form-fitting fashion indirectly with the aid of at least one adapter component into an interface between one of the spreading device and the brake shoe and the abutment.
5 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the compensation device has a movable bearing arrangement.
6 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein a master radius positioned on an actuating element is dimensioned to be gradually smaller than a slave radius positioned on a brake shoe.
7 . The drum brake for a motor vehicle brake system as claimed in claim 6 , wherein the master radius is at least 0.6-1.5 times the brake drum diameter, and wherein the paired counterpart of the slave radius on a brake shoe is ¼- 1/20 times the brake drum diameter.
8 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein at least one center of radius is offset in the transverse direction toward a wheel axis of rotation by a predefined offset.
9 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the brake shoes are assigned at least one compensation device for brake shoe transverse offset for all brake drum directions of rotation.
10 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein each brake shoe is assigned a compensation device for brake shoe transverse offset for one brake drum direction of rotation.
11 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the compensation device for brake shoe transverse offset is assigned exclusively to one brake drum direction of rotation and exclusively to the at least one trailing drum brake shoe.
12 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein an electrical motor vehicle brake system has a control unit for one of open-loop and closed-loop control of the drum brake.
13 . The drum brake for a motor vehicle brake system as claimed in claim 1 , wherein the electrical motor vehicle brake system has at least one of an electromechanically or electrohydraulically actuatable wheel brake.