Carrier Pot for a Brake Disc, Brake Disc Arrangement

Abstract

A carrier pot for a brake disc includes a radially inner hub ring portion for fastening to a wheel hub and a radially outer brake disc ring portion for fastening to the brake disc. The carrier pot is made from a fiber-reinforced plastic which has a plurality of fiber layers. The fibers of at least two adjacent fiber layers are oriented such that the fiber layers run differently with respect to one another.

Claims

1. A carrier pot for a brake disk, comprising: a radially internal hub ring portion configured to be secured to a wheel hub; a radially external brake disk ring portion configured to be secured to the brake disk, wherein the carrier pot includes a fiber plastics composite having a plurality of fiber layers, and wherein fibers of at least two adjacent fiber layers of the plurality of fiber layers are orientated so as to extend differently relative to each other.

2. The carrier pot as claimed in claim 1, wherein the fibers of the at least two adjacent fiber layers are orientated so as to extend at least substantially perpendicularly to each other.

3. The carrier pot as claimed in claim 1, wherein: the radially internal hub ring portion and/or the radially external brake disk ring portion has at least one securing location configured to be secured to the wheel hub or the brake disk; and at least one additional support fiber surrounds the at least one securing location at least substantially annularly.

4. The carrier pot as claimed in claim 3, wherein the at least one additional support fiber surrounds the at least one securing location at least substantially as a circular ring.

5. The carrier pot as claimed in claim 3, wherein: the at least one securing location is a plurality of securing locations; and the at least one additional support fiber surrounds the plurality of securing locations annularly.

6. The carrier pot as claimed in claim 3, wherein the at least one additional support fiber annularly surrounds alternately a securing location of the at least one securing location of the brake disk ring portion and a securing location of the at least one securing location of the wheel hub ring portion.

7. The carrier pot as claimed in claim 3, wherein: the at least one securing location is a plurality of securing locations; and the at least one additional support fiber is arranged so as to extend between two securing locations of the plurality of securing locations along a loading path of the carrier pot.

8. The carrier pot as claimed in claim 3, wherein two support fibers or two support fiber portions of the at least one additional support fiber intersect in a radial region between the brake disk ring portion and the wheel hub ring portion.

9. The carrier pot as claimed in claim 3, wherein the at least one additional support fiber is stitched into the fiber plastics composite.

10. A brake disk device for a wheel brake of a vehicle, comprising: at least one brake disk; and at least one carrier pot connected to the brake disk in a rotationally secure manner, the carrier pot including: a radially internal hub ring portion configured to be secured to a wheel hub; and a radially external brake disk ring portion configured to be secured to the brake disk, wherein the carrier pot includes a fiber plastics composite having a plurality of fiber layers, and wherein fibers of at least two adjacent fiber layers of the plurality of fiber layers are orientated so as to extend differently relative to each other.

Description

[0015] The invention is intended to be explained in greater detail below with reference to the drawings, in which:

[0016] FIG. 1 is a perspective cross-section of a brake disk device,

[0017] FIG. 2 is a cross-section of a carrier pot of the brake disk device,

[0018] FIG. 3 is an enlarged view of a detail of the carrier pot and

[0019] FIG. 4 is a simplified perspective view of the carrier pot.

[0020] FIG. 1 is a perspective cross-section of a brake disk device 1 for a wheel brake of a motor vehicle. A wheel brake in conventional motor vehicles generally has a brake caliper, on which brake linings are arranged, between which a brake disk is guided. If the brake linings are moved in the direction of the brake disk, it is clamped between them and a braking force or a braking torque is thereby produced.

[0021] To this end, the brake disk 2 of the brake disk device 1 as shown in FIG. 1 is advantageously constructed in a point-symmetrical manner relative to the axis and in a circular manner. At the axial end sides thereof, it has brake faces 3 which cooperate with the brake linings of the wheel brake. The brake linings are constructed in the manner of a circular ring and have in this case a plurality of ventilation openings 4 for cooling the brake disk device 1 during operation. The cooling is necessary because brake disks of a braking operation are subjected to high mechanical and thermal loads. The cause of this is that, during the deceleration of the vehicle which has the brake disk device, practically the entire kinetic energy stored in the vehicle has to be converted into heat. Since the brake disk 2 in the vehicle constitutes a non-cushioned rotating mass, there are efforts to reduce the mass of the brake disk 2.

[0022] The brake disk 2 is securely connected to a carrier pot 5 which can be secured to a wheel hub or to a rim of a wheel of the vehicle in order to transmit the braking forces to the wheel. In conventional brake disk devices, the carrier pot 5 and the brake disk 2 are produced integrally with each other, for example, by a grey cast iron casting method. In order to reduce the mass of the brake disk device 1, it is now also known to construct the carrier pot 5 and brake disk 2 separately from each other in order to allow advantageous material combinations for the carrier pot 5 and the brake disk 2, in particular for the friction ring of the brake disk 2. In this case, it is also known to use, in addition to grey cast iron, aluminum, steel or silicon carbide ceramic materials. The carrier pot 5 and brake disk 2 are then connected to each other by extremely different connection methods, such as, for example, bolting, screwing or casting.

[0023] In the brake disk device 1 shown in FIG. 1, the carrier pot 5 has a plurality of securing locations 6 and 7 which are used to secure the carrier pot 5 to the brake disk 2 and to the wheel hub. To this end, the securing locations 6 are constructed on a radially external brake disk ring portion 8 and are arranged so as to be distributed uniformly over the periphery of the carrier pot 5. The securing locations 7 are arranged so as to be distributed uniformly over the periphery on a radially internal wheel hub ring portion 9 of the carrier pot 5. The connection with respect to the brake disk 2 is produced at the securing locations 6 and the connection with respect to the wheel hub is produced at the securing locations 7.

[0024] According to the present embodiment, the securing locations 6 are constructed as securing openings which are used to screw, bolt or rivet the carrier pot 5 to the wheel hub or the brake disk 2, respectively. Alternatively, at least some of the securing locations and/or 7 can also be constructed as particularly stud-like projections on the carrier pot 5. The securing locations 6 can also be constructed as pockets, in which a separate securing bolt which axially projects from the carrier pot 5 is cast or formed. The securing locations 6 are preferably constructed in such a manner that they are also protected at high thermal loads by the ventilation holes 4 or similar cooling devices, such as, for example, air gaps of the brake disk, or by using thermally insulating materials in the region of the securing locations 6, such as, for example, ceramic bushes or ceramic coatings.

[0025] According to the present embodiment, the carrier pot 5 is produced from a fiber plastics composite which ensures a sufficiently high mechanical and thermal durability with particularly low weight.

[0026] In this regard, FIG. 2 is a simplified cross-section through the brake disk ring portion 8 of the carrier pot 5. The fiber composite plastics material has a plurality of layers 10, 11, 12 of identically orientated or extending fibers, wherein the fibers of the adjacent layers 10, 11, 12 are orientated differently, in this case perpendicularly, relative to each other. A high strength of the carrier pot 5 is thereby ensured so that high braking forces can also be transmitted by the carrier pot 5 in both directions of rotation.

[0027] FIG. 3 is an enlarged detailed view of the carrier pot 5 in the region of one of the securing locations 6. In addition to the fibers of the fiber plastics material composite of the carrier pot 5, it has a support fiber 13 which annularly surrounds the securing location 6 or the securing opening. The support fiber 13 is stitched into the material of the fiber plastics material composite and comprises in particular a plurality of fiber strands which have been woven with each other by the stitching. As a result of the annular configuration of the support fiber 13, the carrier pot 5 is further reinforced and supported in the region of the securing location 6 so that the durability of the carrier pot 5 is substantially increased by a minimal weight increase by the support fiber 13. Advantageously, a corresponding support fiber 13 is associated with each securing location 6. A support fiber 13 which annularly surrounds the respective securing location 7 is also associated with the securing locations 7. The support fiber 13 is advantageously fitted to the carrier pot 5 by a stitching operation so that it partially extends in particular axially through the layer structure of the fiber plastics material composite and is consequently located perpendicularly to the orientation of the fiber layers 10, 11, 12 over a large portion of the length thereof. In this manner, the composite layers 10, 11, 12 are reinforced in an ideal manner against delamination in the event of high loads in the region of the securing location 6, 7 by the axial reinforcement and consequently the durability of the securing locations 6, 7 is improved. In particular, the respective support fiber 13 is partially stitched on the fiber plastics material composite or carrier pot 5 in the region of the securing locations in order to even further increase the durability.

[0028] As a result of the support fibers 13, consequently, the securing locations 6 and 7 the carrier pot 5 are advantageously supported and the durability of the carrier pot 5 and the brake disk device 1 is thereby generally increased.

[0029] FIG. 4 shows an advantageous development of the carrier pot 5, according to which a support fiber 13 annularly surrounds not only one securing location 6 or 7 but also a plurality of securing locations 6 and 7, respectively. To this end, the support fiber 13 is stitched on the carrier pot 5 in such a manner that it annularly surrounds alternately a securing location 7 and a securing location 6 which is adjacent or spaced apart in a peripheral direction and which extends between the securing locations 6 and 7 preferably at least substantially in elongate form in a radially outward direction or in a radially inward direction between the securing locations 6, 7. The loop-like extent of the support fiber 13 shown by way of example in FIG. 4 is thereby produced. In this case, there is in particular provision for the support fiber portion 13 to be arranged so as to extend between the securing locations 6, 7 along a loading path of the carrier pot 5. The loading path is particularly calculated and constitutes the force flow through the carrier pot 5 during a braking operation. As a result of the advantageous configuration, it is possible for high braking forces to be able to be produced by the carrier pot 5 or to be transmitted from the brake disk 2 to the respective wheel. As a result of the extent of the support fibers 13 shown in FIG. 4, it is possible for support fiber portions to intersect between the securing locations 6 and 7 so that the carrier pot 5 is constructed to be strengthened in both rotation directions or durable as a result of the support fiber 13. FIG. 4 shows a portion of the support fiber 13 for the purposes of visualization. Advantageously, the support fiber 13 extends over the entire periphery of the carrier pot 5 so that it annularly surrounds at least once at least all the securing locations 7 and at least every other securing location 6. By providing additional such support fibers, all the securing locations 6 and 7 can be supported at least once, wherein the support fibers 13 then also intersect once or repeatedly in the radial region between the securing locations 7 and the securing locations 6.

[0030] As a result of the advantageous construction, both a high level of rigidity and strength of the carrier pot is ensured in the fiber direction under tensile loading with little rigidity of the surrounding plastics matrix and of the fibers of the fiber layers 10, 11, 12 transversely relative to the fiber direction, or pressure loading.

[0031] By using the fiber composite plastics material for the carrier pot 5 with in particular quasi-isotropic properties for securing the direction of rotation of the independent strength of the carrier pot 5, the mentioned advantages are achieved. The material of the support fibers 13 and the fibers in the layers 10, 11, and of the plastics material are selected in accordance with the mechanical and thermal requirements. By using the fiber reinforcement which is suitable for laden travel as a result of the support fibers 13 which ideally extend in such a manner that they are loaded only in terms of tension, substantially higher loads can be achieved with little material application. Depending on the selection of the fiber reinforcement which is suitable for laden travel as a result of the support fibers 13, the strength of the carrier pot 5 can also be adjusted in accordance with the direction of rotation.