Brakes – Elements – Brake wheels
Patent
1995-11-06
1998-10-20
Ballato, Josie
Brakes
Elements
Brake wheels
188264A, F16D 6512
Patent
active
058233032
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a brake disc, e.g. for a disc brake of a vehicle, having a friction ring and a bearing part connected to the friction ring by connecting in the form of pins, bolts or the like.
BACKGROUND OF THE INVENTION
It is known to produce a brake disc from two parts, the friction ring generally consisting of grey cast iron and there being provided, as bearing part for the friction ring, a steel or aluminium pot. The friction ring and pot are joined together, for example, by screws, the connection being made, in the case of a ventilated brake disc, by means of a friction ring half.
A drawback with a brake disc of this type is however that corrosion problems arise between grey cast iron and steel or light metal, particularly in the case of a direct contact by means of screws and in connection with salt water, e.g. in winter.
There is also additionally the drawback that distortions and even cracks can arise due to different temperature expansions between the friction ring and the pot. As a result of the one-sided fastening between the friction ring and the pot, a so-called "dishing", i.e. a warping of the friction ring can arise. The friction ring, in fact, when operating at high temperatures, undergoes dimensional changes, which can lie within the millimeter range.
From DE 34 36 729 A1, a brake disc is already known which is in two parts, having a friction ring and a bearing part connected to the friction ring. The connection between the friction ring and the bearing part is made by means of bolts or pins which, on the one hand, are seated in bores in the circumferential wall of the friction ring and, on the other hand, project radially out of the circumferential wall of the bearing part. The thermically stressed brake ring is thereby intended to be able to expand independently from the hub and a heat transfer to the hub is largely prevented.
The object of the present invention is therefore to provide a brake disc of the type mentioned in the introduction, which avoids the drawbacks of the prior art and which, in particular, enables a better and less problematic expansion of the friction ring at high temperatures, where necessary even within the millimeter range.
According to the invention, this object is achieved by the fact that the pins are displaceable relative to the bores.
In place of a one-sided connection between the friction ring and the bearing part, e.g. a pot, a central connection in the axial plane of symmetry of the friction ring can be made by means of the pins, bolts or the like, whereby, for example, a dishing of the friction ring during running travel is prevented.
One of the essential advantages of the brake disc according to the invention lies in the fact that the friction ring, at the high temperatures which occur in running, is able to expand largely without difficulty.
As a result of the interposition of pins, which can consist, for example, of high-grade, e.g. stainless steel, corrosion problems can also be prevented.
Without any occurrence of tensions or warps, the friction ring is herein able in running to expand within the millimeter range.
To this end, a correspondingly minor play will generally be provided between the circumferential walls of the bores and the pins, at the same time the depth of the bores being able to be a few millimeters deeper than the length of the pins in the region in which they project into the bores.
The configuration of deeper bores is not however necessary in every case, since the friction ring will generally expand more strongly in the outward direction. The brake disc design according to the invention enables a weight reduction also to be obtained. This can be realized, for example, by the use of light metal or plastic on the pot as bearing part and by a corresponding material saving resulting from the nature of the connection between the pot and the friction ring, by means of the pins.
In practice, the connection or mounting of the friction ring, according to the invention, relative to the bearing part makes possible a mobility betwe
REFERENCES:
patent: 2215420 (1940-09-01), Eksergian
patent: 2380085 (1945-07-01), Tack et al.
patent: 2769512 (1956-11-01), Tack
patent: 4108286 (1978-08-01), Gagarin
patent: 4792022 (1988-12-01), Thiel
patent: 5109960 (1992-05-01), Gunther
patent: 5161652 (1992-11-01), Suzuki
patent: 5429214 (1995-07-01), Wiebelhaus et al.
Hipp Armin
Schmitt Ulrich
Schwarz Guenther
Ballato Josie
Schwaebische Huettenwerke GmbH
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