WO2013029745A1

WO2013029745A1 - Holding arrangement for a wheel hub and brake disc

Info

Publication number: WO2013029745A1
Application number: PCT/EP2012/003385
Authority: WO
Inventors: Ralph Mayer; Wolfram Niedermann; Claus-Peter Weidner; Philip Frey
Original assignee: Daimler Ag
Priority date: 2011-09-01
Filing date: 2012-08-08
Publication date: 2013-03-07
Also published as: DE102011112230A1

Abstract

A holding arrangement (1) of a rim (2) and a brake disc (3) on a wheel hub (4) of a vehicle, wherein the brake disc (3) has a friction ring and a cup (5). The wheel hub (4) has an annular cup contact surface (6) via which said wheel hub is in contact with the cup (5), and a rim contact surface (7) which protrudes axially over the cup contact surface (6). The rim (2) bears against the rim contact surface (7), and an elastic damping element (9) is arranged in an annular space (8) bonded in the axial direction by the cup (5) and the rim (2).

Description

Retaining arrangement for wheel hub and brake disc

The present invention relates to a retaining arrangement of a rim and a brake disc on a wheel hub of a vehicle according to the preamble of

Claim 1. The invention also relates to a brake disc, which is suitable for such a holding arrangement and a vehicle with such a holding arrangement.

In the case of vehicle wheels, a brake disk and a rim of the respective vehicle wheel are fastened to a wheel hub of the vehicle, which is rotatably mounted by means of corresponding wheel bearings about an associated wheel axle. Widely used is an axial construction, in which the wheel hub has a transverse to the axis of rotation extending flat contact surface on which a brake disc with a pot carrying a friction ring is axially mounted, wherein a corresponding pot bottom is also configured on its inner side, to come to the contact surface of the hub flat to the plant. On a likewise just configured outside of the pot base, the rim is then placed axially, which also has a transverse to the axis of rotation extending flat contact surface for a flat contact with the pot of the brake disc. By appropriate

Fittings can be transmitted to the torques occurring during operation. However, a problem with such an axial structure is a space lying between the bottom of the pot and the rim, which can lead to undesired noise.

From the date of filing the present application not yet published patent application with the official file number DE 10 2010 055 379 a generic holding arrangement of a rim and a brake disc on a wheel hub of a vehicle is known, wherein the brake disc has a friction ring and a pot. A simplified structure results when the wheel hub has an annular pot contact surface, wherein the wheel hub has a transversely extending axis of rotation rim contact surface which projects axially beyond the pot contact surface, when the hub at the transition between pot contact surface and rim contact surface has an annular radial Mitnehmeraußenkontur when the rim at the Rim contact surface is applied when the pot has a central pot opening, the opening edge has a complementary Mitnehmeraußenkontur the wheel hub radial Mitnehmerinnenkontur and when the Mitnehmerkonturen each other

positively engage.

From DE 10 2007 048 648 A1 discloses a brake disc is known, which has a friction ring and a pot, wherein the friction ring and the pot are made separately and secured to each other in a suitable manner. The pot has this purpose a pot bottom, which is designed as a flange and can be flanged axially in a conventional manner to a complementary flange of a hub.

From DE 102 56 589 B4 a further holding arrangement is known in which the brake disc is mounted radially on the wheel hub.

The present invention is concerned with the problem of providing for a holding arrangement of the type mentioned or for an associated brake disc or equipped with such a holding device vehicle an improved embodiment, which is characterized in particular by a reduced noise.

This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

The present invention is based on the general idea that

Noise in the area of a holding arrangement of a rim and a

To minimize or eliminate the brake disc on a wheel hub, that an elastic damping element is provided, which is inserted into a limited in the axial direction by a pot of a brake disc and the rim annulus and thereby eliminates this as a resonance chamber. The brake disc has in a known manner a friction ring and the aforementioned pot. The wheel hub is in contact with the pot of the brake disk via an annular pot contact surface, and additionally has a rim contact surface extending transversely to the axis of rotation, which extends axially beyond the wheel rim

Pot contact surface protrudes or protrudes and over which rests the wheel hub in the axial direction of the rim. Between the pot and the rim thereby arises the mentioned annulus, which could previously lead to an undesirable noise. By now According to the invention used in this annulus elastic damping element, which in the assembled state has a greater axial expansion than the annulus itself, the annulus is filled with mounted holding arrangement at least in the axial direction of the damping element and thereby the otherwise resulting there

Noise development prevented. The annular space created by the separation of a flange of the wheel and the brake disc to improve a plan stop between the pot and the hub. With the damping element while a bias between the pot of the brake disc and the

Rim contact surface achieved, whereby on the one hand, the function of the brake disc is not affected, on the other hand, due to the vibration damping effect of the damping element, which is formed for example of an elastomer, axial vibrations that lead to the unwanted noise and vibration, minimized or even eliminated in the case of preference can. The damping element itself represents a production engineering simple and at the same time cost-effective component, so that the resulting comfort gain can be achieved with relatively little monetary effort.

In an advantageous embodiment of the invention, the solution

Damping element made of plastic, in particular made of an elastomer. Elastomers are dimensionally stable but elastically deformable plastics whose

Glass transition point is below the operating temperature. elastomers

Plastics can deform elastically under tensile and compressive loading, but then find their way back to their original undeformed shape and are thus particularly suitable for use with damping elements. The cause of the elasticity is predominantly the ability of clogged polymer chains to react to a tensile load with an extension or unbundling of the chains. At compressive stress also acting on elastomers damping elements also tensile stresses orthogonal to the compressive stress direction, so also here for the stretching of the entangled

Polymer chains and their subsequent contraction the above applies. By influencing the length or configuration of the polymer chains can

Of course, individual influence on the respective properties, in particular with regard to elasticity, of the respective elastomer are taken. Elastomers are easy to manufacture and inexpensive to manufacture and in particular extremely flexible in terms of their properties.

In an advantageous development of the solution according to the invention, a side facing the annulus of the pot of the brake disc has a groove into which the At least partially engages damping element. Such a groove in this case represents a positioning aid for securing the damping element, so that this can be arranged fixed, for example via an arranged in the groove adhesive seam with respect to its position on the pot of the brake disc. Of course, alternatively or in addition to the bonding of the damping element with the pot of the brake disc and a Verclipsen same with the pot of the brake disc conceivable, in which case corresponding openings or undercut contours are provided in the pot of the brake disc, with which corresponding and arranged on the damping element locking elements or Clip elements are clipped or locked.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

In each case show schematically:

1 shows a sectional view through a first possible embodiment of a holding arrangement according to the invention,

2 is a sectional view and a view of a possible embodiment of the holding arrangement according to the invention with a damping element with wedge-shaped cross-section,

3 shows a representation as in FIG. 2, but with a damping element with a round cross-section and a groove for at least partially receiving the damping element, FIG. 4 is a sectional view through a pot of a brake disc with a groove produced by a stamping, in which the damping element engages at least partially,

5 is a representation as in Figures 2 and 3, but with a different design damping element,

6 shows another possible embodiment of the holding arrangement according to the invention, but with clippable damping element,

Fig. 7a is a view of a pot of a brake disc arranged thereon

Damping element with wedge-shaped cross-section,

7b is a representation as in Figure 7a, but with a damping element with a round cross-section, which is embedded in a corresponding groove on the pot of the brake disc,

8 shows a front view and a rear view of the cup of the brake disk with a cushioned damping element.

Corresponding to FIG. 1, a holding arrangement 1 of a rim 2 and a brake disk 3 is shown on a wheel hub 4 of a vehicle which is not shown otherwise. The brake disc 3 has a fixed to a pot 5 friction ring 13 (see Figures 3 and 5). In addition, the wheel hub 4 has an annular pot contact surface 6, via which it is in contact with the pot 5, as well as a rim contact surface 7, which projects axially beyond the pot contact surface 6. The rim 2 rests against the rim contact surface 7. In an axially limited by the pot 5 on the one hand and the rim 2 on the other hand, annular space 8 according to the invention an elastic damping element 9 is arranged, through which a vibration damping effect is achieved. As a result, in particular occurring axial vibrations, which lead to unpleasant noises and vibrations, can be minimized or even eliminated. In particular, a so-called noise vibration harshness behavior can be optimized by the damping element 9 according to the invention. The erfmdungsgemäße damping element can be made of plastic, in particular of an elastomer, be formed, wherein the entangled polymer chains react to tensile stress with an extension or unbundling of the chains. After dropping the tensile load, the chains relax back into their static preferred ball-like state. The damping element 9 according to the invention may, for example, have an annular shape or else an at least annularly closed shape with corresponding serrations, as shown for example in accordance with FIGS. 2, 3 and 7a, b. Of course, it is also conceivable that the damping element 9 has a plurality of unconnected sections 10, as shown for example in FIG 5.

A compound of the damping element 9 with the pot 5 of the brake disc 3 is conceivable, for example via an adhesive connection or via a clip connection, as shown for example in Figures 6 and 8. For this purpose, 5 corresponding openings are provided on the pot, in which damping element-side locking contours, for example locking lugs or locking pins 11 engage. Of course, the clip connection and the adhesive connection are not only alternative, but also cumulatively applicable.

Looking at Figure 2, it can be seen that the damping element 9 has a wedge-shaped in the radial direction cross-sectional shape, whereby the contact surface changes in particular under the influence of temperature and thereby can be adapted to a particular temperature. Alternatively, a round cross-section is also conceivable, as shown for example in the left-hand illustration in FIG. 3 or in the right-hand illustration in FIG. 7b. In addition, a groove 12 can be provided on a side of the pot 5 facing the annular space 8 (compare FIG. 3, left-hand illustration and FIG. 4), in which the damping element 9 engages at least partially. The groove 12 may be formed, for example, as an embossment.

With the damping element 9 according to the invention, both a reduction of the noise development and a reduction of the vibrations can be achieved, whereby in particular a gain in comfort with regard to the so-called noise-vibration-harshness behavior can be achieved. In addition, an improvement of the so-called plan stop as well as a reduction of unwanted screw release of wheel bolts can be achieved. By clipping the damper Fung element 9 with the pot 5 of the brake disc 3, a comparatively simple fastening of the damping element 9 can be achieved beyond. The detent pins 11 or detent contours, which are required for this purpose, can be molded onto the damping element 9 and thus produced together with it. The damping element 9 per se can be made relatively inexpensive and easy to manufacture.

Claims

claims

1. holding arrangement (1) of a rim (2) and a brake disc (3) on a wheel hub (4) of a vehicle, the brake disc (3) having a friction ring (13) and a pot (5),

characterized in that

- The wheel hub (4) has an annular pot contact surface (6), via which it is in contact with the pot (5),

- The wheel hub (4) has a rim contact surface (7) axially over the

Pot contact surface (6) protrudes,

- The rim (2) on the rim contact surface (7) is present,

- In an axial direction through the pot (5) and the rim (2) limited annular space (8), an elastic damping element (9) is arranged.

2. Holding arrangement according to claim 1,

characterized in that

the damping element (9) made of plastic, in particular of an elastomer, is formed.

3. Holding arrangement according to claim 1 or 2,

characterized in that

- The damping element (9) has an annular shape, or

- Has the damping element (9) a plurality of unconnected parts (10), or

- The damping element (9) has an annular closed shape with teeth.

4. Holding arrangement according to one of claims 1 to 3,

characterized in that the damping element (9) is firmly connected to the pot (5) via a clip and / or adhesive connection.

5. Holding arrangement according to one of claims 1 to 4,

characterized in that

a the annular space (8) facing side of the pot (5) has a groove (12) into which the damping element (9) engages at least partially.

6. Holding arrangement according to claim 5,

characterized in that

the groove (12) is formed as a stamping.

7. Holding arrangement according to one of claims 1 to 6,

characterized in that

the damping element (9) has a round or wedge-shaped cross-sectional shape.

8. brake disk (3) of a vehicle,

with a friction ring (13),

- With a rotatably connected to the friction ring (13) connected pot (5) having a groove (12) for receiving a pot (5) relative to a rim (2) in the axial direction damping damping element (9).

9. Motor vehicle with a holding arrangement (1) according to one of claims 1 to 7 and / or with a brake disc (3) according to claim 8.