Brakes – Wheel – Axially movable brake element or housing therefor
Patent
1999-06-25
2000-08-22
Oberleitner, Robert J.
Brakes
Wheel
Axially movable brake element or housing therefor
188 717, 188 711, 188 7335, F16D 5502
Patent
active
061057347
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates generally to an air-operated disk brake for vehicles, particularly for utility vehicles, preferably a utility vehicle disk brake with a ratio between the inside disk diameter and the outside disk diameter of 0.6. The brakes have brake shoes with brake linings arranged on both sides of a brake disk, have an application device for the application of one of the brake shoes and have a force transmission device for transmitting the application force to the brake shoe on the other side of the brake disk. The invention also relates to a method for the manufacturing thereof.
A disk brake of this type is illustrated in German Patent Document DE PS 37 16 202. The disk brake disclosed in this document is pneumatically operated and is therefore suitable mainly for use in the utility vehicle field, where it has had good results in practice. A cast caliper is used as the force transmitting device for transmitting the application force to the brake shoe on the other side of the brake disk. Constructive simplification is desirable for reducing the weight and lowering the manufacturing costs. The invention aims at solving this problem.
The invention achieves this goal. In contrast to the prior art of this type, a one-piece or multi-part modular element is provided for receiving elements of the application device, which are significant with respect to the operation. The force transmitting device is constructed as a closed frame which surrounds the modular element together with the application device inserted in the modular element as well as both brake shoes (particularly such that it completely absorbs the application forces). The modular element is constructed such that it significantly increases the rigidity of the frame in the area of the modular element. The modular element preferably increases the rigidity of the frame such that, in the area of the modular element, the frame essentially absorbs only normal forces, that is, tension and/or pressure forces.
The special advantage of this construction is replacing the massive cast caliper which is customary in the case of disk brakes and, in pneumatically and hydraulically operated utility vehicle disk brakes, is even considered indispensable. The frame must only surround the operationally necessary elements of the disk brake such that the transmission to the side of the brake disk facing away from the application device or the second brake shoe with the second brake lining will present no problems. The modular element ensures a sufficient rigidity of the construction while the frame has a simple design. The invention therefore has the particular advantage of weight reduction and drastically lowers the costs for manufacturing the brake.
Although attempts were made in the field of hydraulically operated disk brakes for passenger cars to simplify or even save the caliper, the solutions selected cannot be applied to utility vehicle dimensions. Thus, for example, German Patent Document DE OS 42 36 683 shows a floating caliper partial-lining disk brake, for achieving a lower weight and lower manufacturing costs. The floating caliper is formed of two axially spaced parts which are connected with one another by struts made of a high-strength material which extend over the brake disk and bridge the distance between the caliper parts.
The shown disk brake is constructed as a hydraulic brake and, because of its mechanical construction, is suitable only for a use in passenger cars. A similar solution is shown by German Patent Document DE OS 27 42 319, wherein a U-shaped bow is fastened on its open side to a tensioning device. However, it was recognized in none of these documents that it is particularly advantageous for the device for transmitting and absorbing brake reaction forces to virtually enclose the "whole" brake all around. Additional connection points to other elements, such as brake anchors, etc., which may always be a possible source of failure, are eliminated.
From European Patent Document EP 0108 680, a hydra
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Baumgartner Hans
Bieker Dieter
Kuhne Victor
Knorr-Bremse fur Nutzfahrzeuge GmbH
Kramer Devon
Oberleitner Robert J.
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