Patent NZ-743566-A (NZ)
Title: Disc brake, brake pad for a disc brake, and hold-down device for securing brake pads
Inventor: SCHWARZ MICHAEL
IPC: F16D55/2255
Filed: 2016-12-19
Abstract: Disk brakes are normally arranged as far to the outside of the vehicle as possible. At the same time, it is sought to achieve a high level of braking power by making the disk break larger. However, this means there is only a little clearance between the components of the disk brake and the vehicle wheel rotating around the brake. When additional bending loads arise, the brake parts situated radially far to the outside can grind against the rotating inner surface of the vehicle wheel. The present invention provides a disk brake configured to be mounted on a vehicle and having a brake caliper which has a brake disk and brake pads. The brake pads include, arranged on opposite sides of said brake disk, an outwardly arranged brake pad facing toward an outside of the vehicle and an inwardly arranged brake pad facing away from the outside of the vehicle, in a pad channel. Each brake pad is composed of a friction pad and of a backplate. The backplate comprises a circumferential contour comprised of an upper margin, a lower margin, and two side margins. The two side margins connect a first end of the upper margin and a first end of the lower margin to each other and connect a second end of the upper margin and a second end of the lower margin to each other, respectively. The backplate comprises a front side formed as a fastening surface for the friction pad and further comprises a rear side formed as a pressure surface for the transmission of the brake pressure. A hold-down means leads transversely across the brake pads and is supported, in the direction of the disk brake axis, against the brake pads. The hold-down means is formed, over a major part of its overall length, as a channel composed of an elongate base, against which a spring is supported, and of side flanks arranged to the sides of the base, wherein: the upper margin has a predominantly circular-arc-shaped profile extending from the first end to the second end of the upper margin; at least the backplate of the outwardly arranged brake pad comprises, arranged at a distance below the circular-arc-shaped profile of the upper margin, a projection that is integrally formed on the rear side of the backplate, wherein the projection comprises a support surface facing toward the lower margin of the back plate. The projection further comprises a hold-down surface arranged at a distance below the circular-arc-shaped profile of the upper margin and facing away from the support surface. The hold-down means has, toward one end, an S-shaped cranked portion adjoining the base and an end section adjoining the cranked portion. The S-shaped cranked portion is arranged at a side of the brake disc facing toward the outside of the vehicle, wherein the end section extends offset and parallel to the base. The S-shaped cranked portion has a width measured perpendicularly to a length direction of the hold-down means all the way across the hold-down means, wherein said width is smaller than a width of the base measured perpendicularly to the length direction of the hold-down means between the side flanks, a single-part or two-part bearing surface is formed on the end section, wherein the hold-down means is supported against the outwardly arranged brake pad only by the single-part or two-part bearing surface, wherein the single-part or two-part bearing surface is supported only on the hold-down surface on the rear side of the backplate.