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US 12,228,179 B2Granted
Drum brake
AssigneeContinental Automotive Technologies GmbH
InventorsUwe Bach, Christian Vey, Ahmed Sefo, Jens Hoffmann
Life of this patent
Estimating the term…
Abstract
For controlling electromechanically actuatable brakes of servo type construction, it is necessary to detect the forces acting on the abutment of the brake shoes. The abutment is therefore formed from a massive material which deforms under load, wherein measurement devices are provided which detect this deformation. The shape of the abutment is selected in such a way that the abutment has measurement gaps, the size of which changes when the abutment is loaded. The size of the measurement gaps can be sensed by means of Hall sensors or AMR sensors, for example.
Claims15
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.
6 more elements
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;
- and
- wherein a base is carried by a central web starting from a pedestal secured on the carrier plate and adjoining the inner edge of the base;
- wherein the base and the pedestal are connected to one another via two struts situated at edges of the base and the pedestal to form a frame;
- and
- at least one pin starting from the pedestal extends to an inner edge of the base to form a measurement gap.
8 more elements
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;
- and
- wherein the abutment is formed by a base wherein mutually facing edges of the base and a pedestal extend parallel to one another;
- and
- wherein the base and the pedestal are connected to one another via two struts situated at edges of the base and the pedestal to form a frame, wherein at least one pin starting from the pedestal extends to an inner edge of the base to form a measurement gap.
7 more elements
Dependencies are inferred from the claim text.