Self-Energizing Disk Brake With Wedge Elements
AssigneeKNORR-BREMSE Systeme fuer Nutzfahzeuge GmbH
InventorsMichael Herges, Bernhard Miller, Markus Stoehr
Life of this patent
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Abstract
A part-lining disk brake is described, having an electromechanical actuator, a self-energizing application device with a wedge arrangement designed to press a brake lining against a disk brake, and at least two wedge elements of the wedge arrangement moveable relative to one another, arranged on one of a brake caliper frame and an auxiliary frame. The wedge elements are used to apply the brake lining, and act on the brake lining via a trapezoidal pressure plate.
Claims22
A disk brake, in particular a part-lining disk brake, having an electromechanical actuator and an application device of self-energizing type, which as self-energizing device has a wedge arrangement designed to press a brake lining (8) against a disk brake (2), at least two wedge elements moveable relative to one another being arranged on a brake caliper or frame (3) or on an auxiliary frame (4) for applying the application-side [brake lining], said elements being designed to act on the brake lining (8) via a trapezoidal pressure plate—wedge plate (9).
The disk brake as claimed in either of the preceding claims, characterized in that the wedge elements are arranged on the brake caliper (3) or on the auxiliary frame (4) so that they can move parallel to the brake disk (2).
The disk brake as claimed in one of the preceding claims, characterized by a design configuration such that a unit comprising the wedge elements (5, 6) and the brake lining unit (7) can during braking sequences be moved together on the brake caliper (3) or on the auxiliary frame (4) parallel to the brake disk friction surface (2a) against stops.
The disk brake as claimed in one of the preceding claims, characterized in that the auxiliary frame (4) has a U-shape and is provided with a base member (11a), which is bounded at both ends by longitudinal members (11b, 11c), which extend from the base member (7) in the direction of the brake disk and which serve as stops for the wedge elements (5, 6) in their movements in a peripheral direction according to the direction of rotation (U1, U2) of the brake disk (2).
The disk brake as claimed in one of the preceding claims, characterized in that the pressure plate (9) on its side remote from the brake disk has a trapezoidal shape with two wedge faces (12, 13) inclined towards one another, which bear against the wedge faces (14, 15) of the wedge elements (5, 6), likewise inclined towards one another.
The disk brake as claimed in one of the preceding claims, characterized in that the mobility of the wedge elements (5, 6;
- 5′, 6′) relative to one another is achieved by means of an electric motor (35, 36), which acts on an arrangement of transmission elements.
The disk brake as claimed in one of the preceding claims, characterized in that the transmission elements comprise an electric motor-driven spindle (15), which in one direction of rotation moves the wedge elements (5, 6) towards one another and in the other direction of rotation of the spindle (15) moves them away from one another.
The disk brake as claimed in one of the preceding claims, characterized in that the spindle (15) is designed as a recirculating ball screw.
The disk brake as claimed in one of the preceding claims, characterized in that the transmission elements comprise a threaded spindle (15).
The disk brake as claimed in one of the preceding claims, characterized in that the transmission elements comprise at least one or more of the following elements:
- a. at least one spindle (15),
- b. at least one planetary rolling contact mechanism (28),
- c. a toothed rack arrangement (29) as drive between the wedge elements (5, 6),
- d. a bracing arrangement (30) with eccentrics (31);
- e. a bracing arrangement (32) with expansion wedges (33);
- f. a lever arrangement
The disk brake as claimed in one of the preceding claims, characterized in that the wedge elements (5, 6) each have more than one wedge face.
The disk brake as claimed in one of the preceding claims, characterized in that the wedge elements are embodied as a pair of double wedges with intermeshing double wedge elements (5′, 6′), which bear against a pressure plate (8′) with corresponding double wedge arrangement (34).
The disk brake as claimed in one of the preceding claims, characterized in that the electric motor (35, 36) is mounted on the auxiliary frame.
The disk brake as claimed in one of the preceding claims, characterized in that the electric motor (35, 36) is mounted on the outside face of the brake caliper and is connected to the wedge elements via a transmission connection.
The disk brake as claimed in one of the preceding claims, characterized in that the transmission connection has a toothed rack arrangement.
The disk brake as claimed in one of the preceding claims, characterized in that an electronic control unit is arranged on the brake caliper (3).
The disk brake as claimed in one of the preceding claims, characterized in that damping elements are fitted between the wedge elements (5, 6) and the stops on the longitudinal members (11b, c).
The disk brake as claimed in one of the preceding claims, characterized in that the wedge elements (5, 6) are displaceable relative to the brake caliper (3) also in a direction parallel to the brake disk axis of rotation (X), in order to compensate for brake lining wear.
The disk brake as claimed in one of the preceding claims, characterized in that the wedge elements (5, 6) are moveably arranged on an adjustment plate (19), which is arranged on the auxiliary frame (4) or on the brake caliper so that it can move parallel to the brake disk axis of rotation.
The disk brake as claimed in one of the preceding claims, characterized in that adjustment pistons (20, 21) of axially variable length are arranged between the brake caliper (3) or the auxiliary frame (4) and the adjustment plate (19).
The disk brake as claimed in one of the preceding claims, characterized in that bearing devices, in particular roller bearings (22, 23, 24;
- FIG. 5) or slide bearings (25, 26 27;
- FIG. 6) are arranged between the wedge faces (12, 13) and (14, 15) and between the adjustment plate (19) or the base member (11a) and the wedge elements.
Dependencies are inferred from the claim text.