Patent Application
20060108188
This application is based on German Patent Application 10 2004 054 012.8 filed Nov. 9, 2004, upon which priority is claimed.
1. Field of the Invention
The invention is based on a friction brake lining for a disk brake and to a brake caliper for such a disk brake.
2. Description of the Prior Art
Friction brake linings of known disk brakes are mounted on platform-like, flat lining holders, which because of their thickness are resistant to bending.
The friction brake lining of the invention has a lining holder with one or more reinforcements against bending. The reinforcements may protrude from a lining holder plane in the manner of reinforcing ribs. The term reinforcements is understood to mean in particular stucture formed out from the lining holder plane, which because of their shape reinforce the lining holder against bending.
The invention has the advantage that it makes a thin and consequently lightweight lining holder possible, which is nevertheless resistant to bending.
Advantageous features and refinements of the invention are disclosed. For disassembly of the friction brake lining, one or more openings are provided for the engagement of a disassembly tool. As the disassembly tool, a screwdriver, for instance, can be put through the opening between the lining holder and the brake caliper, and the friction brake lining can be lifted from the brake caliper using the screwdriver.
The brake caliper of the invention has a friction brake lining with a lining holder of the type described above.
The invention will be better understood and further objects and advantages thereof will become more apparent from the ensuing detailed description of a preferred embodiment, taken in conjunction with the drawings, in which:
The disk brake 10 of the invention, shown in the drawings, has a brake disk 12 and two friction brake linings 14, 16, which are located facing one another on either side of the brake disk 12 in a brake caliper. The brake caliper itself is not shown, for the sake of clearly illustrating the other parts of the disk brake 10. The friction brake linings 14, 16 are in multiple parts and are mounted on lining holders 18, 20. Between the friction brake linings 14, 16 and the lining holders 18, 20, there can be an intermediate layer 23 for joining the friction brake linings 14, 16 to the lining holders 20. The intermediate layer 23 may be in multiple parts. In
The multiple-part embodiment of the friction brake linings 14, 16 has the advantage that they can be more simply fastened to the lining holders 18, 20. For fastening to the lining holders 18, 20, it would be more favorable (not shown) to use small, compact friction brake linings that for instance are square or round. In the exemplary embodiment shown and described, friction brake linings 14, 16 in the form of an arc of a circle that are adapted to the circular shape of the brake disk 12 are used, as usual.
The lining holders 18, 20 are reformed parts, namely deep-drawn parts made of sheet metal. They have an encompassing rim 22, 24, which is reformed from the friction brake linings 14, 16 to protrude away from the lining holders 18, 20. Beads 26, 28 extending crosswise to one another form a kind of reinforcing ribs, which divide the lining holders 18, 20 into cassette-like indentations. The rims 22, 24 and the beads 26, 28 form reinforcements against bending of the lining holders 18, 20. They make it possible to manufacture the lining holders 18, 20 from thin material and to save weight. The rims 22, 24 and the beads 26, 28 furthermore bring about a form lock with the friction brake linings 14, 16 in a direction in which they are urged upon braking by a frictional force exerted on the friction brake linings 14, 16 by the brake disk 12. This improves the connection of the friction brake linings 14, 16 to the lining holders 18, 20.
On their rims, the lining holders 18, 20 have inward-oriented fastening tabs 34 for fastening in the brake caliper, not shown. When the friction brake linings 14, 16 are inserted into the brake caliper, the fastening tabs engage complementary recesses in the brake caliper from behind in the manner of a snap or detent device and by that means keep the brake linings 14, 16 in the brake caliper. The fastening tabs 34 can be embodied either resiliently or as plastically bendable, disposable bending tabs. In the first instance, when the friction brake linings 14 are fastened, the fastening tabs 34 snap elastically resiliently into the recesses in the brake caliper, and upon disassembly they snap back out again. In the latter instance, the fastening tabs are bent into the recesses in the brake caliper when the friction brake linings 14, 16 are being installed and must be bent back out again for disassembly. There is no provision for their being re-used.
The undercuts for engagement by the fastening tabs 34, besides being provided on the brake caliper itself, can also be provided on moving parts of the brake caliper, such as on a brake piston (not shown). In
The lining holders 18, 20 are arched in their longitudinal direction, or in other words in the secant direction of the brake disk 12; in their middle region, they have a greater spacing from the brake disk 12 than at their ends. The lining holders 18, 20 may also be embodied in concave or dishlike curved form. When the friction brake linings 14, 16 are being fastened in the brake caliper, the lining holders 18, 20 make contact first with their middle region, because of their curvature. At the edges, the lining holders 18, 20 must be pressed elastically against the brake caliper, so that the fastening tabs can be snapped or bent into the recesses in the brake caliper. The lining holders 18, 20 are thereby fastened in the brake caliper in prestressed fashion and hence do not rattle.
On the side of the friction brake linings 14, 16, the beads 26, 28 of the lining holders 18, 20 have openings 50, which form undercuts that are engaged from behind by the friction brake linings 14, 16. The friction brake linings 14, 16 are as a result held on the lining holders 18, 20 by positive engagement. A conventional material engagement of the friction brake linings 14, 16 and the lining holders 18, 20 can therefore be dispensed with, under some circumstances. In any case, the form-locking connection or positive engagement of the friction brake linings 14, 16 and the lining holders 18, 20 improves their connection to one another. Under some circumstances, the intermediate layers 23 may be dispensed with.
For disassembly of the friction brake linings, openings 44 are provided for the engagement of a disassembly tool. The openings 44 are disposed such that the disassembly tool can be introduced between the lining holders 18, 20 and the brake caliper, not shown, or the part of the brake caliper to which the lining holders 18, 20 are fastened. In the exemplary embodiment of the invention shown and described, an opening 44 for disassembly of the friction brake lining 16 is formed by an outward bulge of the rim 24 of the lining holder 20. The outward bulge makes it possible to introduce a screwdriver, as the disassembly tool, between the lining holder and the brake caliper; with the screwdriver, the lining holder 20 can easily be lifted along with the friction brake lining 16 from the brake caliper.
Another option for disassembly of the friction brake linings 14, 16 is shown in
The lining holders 18, 20 have beads 52, distributed over their surface, which protrude from the sides of the lining holders that face away from the friction brake linings 14, 16. These beads 52 form spacers, which create a spacing between the brake caliper and the lining holders 18, 20. They reduce a heat transfer from the friction brake linings 14, 16 to the brake caliper via the lining holders 18, 20, and as a result the brake is protected against overheating. The term “beads 52” is understood to mean outward bulges or the like in the lining holders 18, 20 which reduce the contact of the lining holders 18, 20 in the brake caliper to point contact, linear contact, or small-area contact faces and thus lessen the heat transfer.
The foregoing relates to a preferred exemplary embodiment of the invention, it being understood that other variants and embodiments thereof are possible within the spirit and scope of the invention, the latter being defined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2004 054 012.8 | Nov 2004 | DE | national |
