Friction brake with self-boosting
AssigneeRobert Bosch GmbH
InventorsDietmar Baumann, Dirk Hofmann, Herbert Vollert, Willi Nagel, Andreas Henke, Bertram Foitzik
Life of this patent
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Abstract
The invention relates to an electromechanical brake with self-boosting by means of a wedge mechanism. An actuating force is exerted on the friction brake lining via toothing sets that mesh with one another. By means of an engagement angle of the toothing sets, a favorable force introduction angle of the actuating force on the friction brake lining can be attained. In addition, by using a nonround gear wheel and/or a non-straight rack as the toothing sets, flaring of a caliper upon braking and an infeeding motion of the friction brake lining transversely to a brake disk can be compensated for.
Claims8
In a friction brake with self-boosting, the friction brake comprising
- a friction brake lining which can be pressed for braking against a brake body to be braked,
- an abutment for the friction brake lining on which the friction brake lining is braced at a bracing angle α, which effects the self-boosting, obliquely to a normal of the brake body, and
- an actuating device with which the friction brake lining can be pressed against the brake body for braking, and the actuating device having two toothing sets, meshing with one another, one of which is drivable and the other of which is operatively connected to the friction brake lining and acts on the friction brake lining at a force introduction angle that is oblique to a normal of the brake body,
- the improvement wherein the toothing sets (30, 32) meshing with one another have an engagement angle αe which produces a force introduction angle β, at which the toothing sets exert an actuating force on the friction brake lining, of approximately 90° minus the bracing angle α.
Dependencies are inferred from the claim text.