Lining backing plate

A backing plate of a disk brake pad is to be produced in an efficient and cost-effective manner and in such a way that the plate offers an increased operating safety. The support surface of the friction lining for improving the transverse strength or shear strength is at least partially provided with an indent area and a large part of the body edges of the indent area are surrounded by the friction lining which is formed on the support surface of the backing plate.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the figures of the drawing in detail, there is shown, in the various views and in a variety of exemplary embodiments, a lining backing plate 1 ; 11 ; 21 ; 31 for a friction lining 3 ; 13 ; 23 ; 33 of a disk brake, made up of a brake disk, a brake caliper having brake pistons, and brake pads, each made up of two such lining backing plates 1 ; 11 ; 21 ; 31 . The brake pad is made up of a backing plate having a bearing surface 2 ; 12 ; 22 ; 32 for friction lining 3 ; 13 ; 23 ; 33 and friction lining 3 ; 13 ; 23 ; 33 , which is there formed from a hardened compound, and guide or holding surfaces of the backing plate in a brake caliper. In order to improve the shear strength, or transverse strength, at least one indent 5 ; 15 ; 25 ; 35 made in bearing surface 2 ; 12 ; 22 ; 32 , whereby a large part of the edges of the indent 5 ; 15 ; 25 ; 35 are surrounded by the friction lining 3 ; 13 ; 23 ; 33 that is formed on the bearing surface 2 ; 12 ; 22 ; 32 of the lining backing plate 1 ; 11 ; 21 ; 31 . Rivets 7 formed out of the backing plate are situated in indent 5 ; 35 of bearing surface 2 ; 32 , thereby fixing an insert 6 ; 36 on the backing plate, whereby the outer contour of insert 6 ; 36 matches almost completely the shape of the inner contour of indent 5 ; 35 . Here, insert 6 ; 36 is manufactured from a stretched material, but however can also consist of a wire mesh or a perforated plate. In a manner that is not shown in the drawings but is likewise advantageous, such rivets can likewise be fashioned on the non-indented region of bearing surface 2 ; 12 ; 22 ; 32 . The insert 6 ; 36 is fixed on the bearing surface 2 ; 32 through a plastic deformation of rivets 7 . In a region around rivets 7 , insert 6 ; 36 is reshaped flatly onto bearing surface 2 ; 32 before or during the riveting, in order to ensure an optimal positively locking connection without play. For quality testing in the manufacturing of brake pads, this fastening can be tested simply and completely even without the use of destructive tests. The lining, which is to be applied to lining backing plate 1 ; 31 as a viscous compound, and which later hardens to form a hard friction layer 3 ; 33 , surrounds insert 6 ; 36 according to FIGS. 2 and 10 , and is fixed on lining backing plate 1 ; 31 in this way. In contrast, lining backing plate 11 according to FIGS. 3 to 5 has six cylindrical openings 16 , into each of which three projections 17 , produced in a stamping process, protrude, in order to anchor the friction lining compound, which is applied onto lining backing plate 11 and into openings 16 in a pulpy state and is subsequently hardened, on the surface of lining backing plate 7 in positively locking fashion against a withdrawal, by means of anchoring pegs 18 formed there. Projections 17 consist of formed parts made via a stamping process in the region of the edge and over a part of the depth of openings 16 , in the form of holding claws, whereby such projections 17 from the side of lining backing plate 11 opposite friction lining 13 and in each opening 16 three projections are formed with equal height, or also with differing height. On a lining backing plate 21 according to FIGS. 6 to 8 , a friction lining 23 is glued in a conventional manner, but is optimally secured against shearing off by indent 25 . In all other specific embodiments as well, shear forces occurring during operation between a friction lining 3 ; 13 ; 23 ; 33 and a lining backing plate 1 ; 11 ; 21 ; 31 are accordingly absorbed not only by rivets 7 thereof or by anchoring pegs 18 , but also, and even in the complete absence of such fastening means, are supported by the side surfaces of indent 5 ; 15 ; 25 ; 35 . Lining backing plate 1 ; 11 ; 21 ; 31 is, as shown in the figures, equipped with additional indents 4 ; 14 ; 24 ; 34 in the side regions, the lower corner regions, or also in the region of a lower lateral edge, the end faces of these additional indents being fashioned as extended guide surfaces in a brake caliper, which, given highly or excessively worn brake linings, act as a safety measure against slipping out for lining backing plate 1 ; 11 ; 21 ; 31 . Through a previously determined type and situation of insert 6 ; 36 and/or of rivets 7 and/or of indent 4 ; 5 ; 14 ; 15 ; 24 ; 25 ; 34 ; 35 and/or of openings 16 , the vibration characteristic of lining backing plate 1 ; 11 ; 12 ; 21 ; 31 can be matched to a desired characteristic, whereby this optimization can be determined by computer simulation and/or trials.