Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1990-01-03
1992-10-27
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
188 7347, B60T 106, F16D 6514
Patent
active
051581590
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a spot-type disc brake, in particular for automotive vehicles.
In a known spot-type disc brake (British Patent Specification=GB-PS No. 1,545,825) brake caliper guide bolts are slidably received in guide bores to be mounted on the brake carrier. This known spot-type disc brake is disadvantageous in that, when manufacturing, the dimensions of the guide bolts and guide bores must be adhered to very accurately so as to prevent jamming of the guides. Further, in the known spot-type disc brake, uneven wear, a high residual braking torque after the release of the brake, and brake rubbing have occurred.
It is further known (German Printed and Examined Patent Application=DE-AS No. 28 04 808) to provide elastic guide sleeves in a spot-type disc brake in the guide bores of a brake caliper for guiding the brake caliper, which radially straddles the brake disc and the brake shoes from the outside, at two axially parallel guide bolts fixed at the brake carrier and to support the brake caliper at the outside edge of the carrier plate of the brake shoe on the brake disc's side away from the guide bolts. The brake caliper and the brake shoe are pressed against each other and against the brake carrier by means of a spring clip. In this known spot-type disc brake the brake shoes are relatively long in the circumferential direction of the brake disc and thus susceptible to uneven wear. A further disadvantage is that the brake caliper has to be removed from the brake carrier when exchanging the brake shoes.
It is an object of this invention to provide a spot-type disc brake of this type which has a simple design and which does not require accurate manufacturing tolerances for the guide arrangement.
SUMMARY OF THE INVENTION
According to this invention this object is solved by a guide system which enables a metal-clad, corrosion-free, rubber, elastic and symmetrical arrangement. Smooth round steel may be used for the guide bolts. Disadvantages of the prior art such as uneven wear, a high residual braking torque after the release of the brake and brake rubbing are eliminated by the inventive solution. The design being simple, the inventive solution in conjunction with the elastic bolt guidance ensures a yieldingness of the brake frame in radial and tangential directions. In particular, in case of corrosion, the brake frame may move and thus again free itself from corrosion. As for manufacture, it is possible to mostly use simple standard parts. The exchange of pads can be effected at the vehicle by simply removing the pads radially.
According to an advantageous embodiment of this invention, for the purpose of supporting a brake caliper in the shape of a frame on the brake disc's side away from the guide rods, one sole point of support is provided on a portion connecting the carrier arms, expediently designed in one piece with the arms. This point of support lies in the plane of the axis of the brake disc and the axis of symmetry of the brake carrier. In this respect it appears to be especially expedient for the brake frame to be supported with its radially outside surface at the radially inside surface of the brake carrier. This means that the spring device, on the opposite side, has to exert a radially inside acting force on the brake frame. In this arrangement the resulting structure is particularly simple and only requires very little treatment, beside the two guide rods an open stop being formed between the brake frame and the brake carrier, which open stop is formed as a third point of support. The point of abutment on the brake frame needs no treatment. For reasons of tolerance compensation, the point of abutment on the brake carrier expediently will be worked on along with he pad supporting surfaces provided on the brake carrier arms. Further advantageous embodiments of this invention provide that the spring device is arranged on the mounting side of the brake carrier. In this arrangement, the spring device in particular may be formed by one sole wire spring expedie
REFERENCES:
patent: Re31794 (1985-01-01), Burgdorf et al.
patent: 4360079 (1982-11-01), Belart
patent: 4391355 (1983-07-01), Evans
patent: 4463837 (1984-08-01), Courbot
patent: 4467898 (1984-08-01), Courbot et al.
patent: 4480724 (1984-11-01), Hoffman, Jr.
patent: 4527667 (1985-07-01), Courbot
patent: 4570760 (1986-02-01), Schmidt
patent: 4630713 (1986-12-01), Carre et al.
Klimt Ulrich
Thiel Rudolf
Alfred Teves GmbH
Lewis J. Gordon
Oberleitner Robert J.
Poon Peter M.
Seitter Robert P.
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