Electromechanical brake actuator
AssigneeWABCO Europe BVBA
InventorsPaul Henning, Eugen Kloos
Life of this patent
Estimating the term…
Abstract
An electromechanical brake actuator (102, 202, 302, 402) for a brake, in particular a commercial vehicle disc brake, has an electric motor (106, 206) for generating a drive torque, a cam disc (108, 208, 308, 408) operatively connected to the electric motor (106, 206) and mounted in a rotationally movable manner, and a brake plunger (114, 214, 314) which can be moved along a plunger axis for the actuation of a brake lever (358) of the brake (368). The cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314) have contact faces which are in contact with one another and slide or roll on one another for the direct transmission of the drive torque between the cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314).
Claims20
An electromechanical brake actuator (102, 202, 302, 402) for a brake, comprising:
- an electric motor (106, 206) for generating a drive torque,
- a cam disc (108, 208, 308, 408) operatively connected to the electric motor (106, 206) and rotatable, and
- a brake plunger (114, 214, 314) which can be moved along a plunger axis, wherein the brake plunger actuates a brake lever (358) of a brake (368),
- wherein each of the cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314) has a contact face respectively in contact with one another and sliding or rolling on one another for a direct transmission of the drive torque between the cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314);
- wherein the brake plunger has an end facing the cam disc, wherein the end facing the cam disc includes a plunger head (112, 212), wherein the plunger head (112, 212) encloses a rolling element (110, 210) mounted by way of bearings (116, 216), the rolling element (110, 210) including the contact face of the brake plunger;
- wherein the contact face of the cam disc is an outwardly facing surface;
- wherein the contact face of the brake plunger is an outwardly facing surface;
- wherein contact between the cam disc and brake plunger occurs between the respective outwardly facing surfaces of the cam disc and the brake plunger;
- wherein the contact faces of the cam disc and brake plunger slide or roll on one another for the direct transmission of drive torque between the cam disc and the brake plunger.
An electromechanical brake actuator (102, 202, 302, 402) for a brake, comprising:
- an electric motor (106, 206) for generating a drive torque,
- a cam disc (108, 208, 308, 408) operatively connected to the electric motor (106, 206) and rotatable, and
- a brake plunger (114, 214, 314) which can be moved along a plunger axis for actuating a brake lever (358) of a brake (368),
- wherein each of the cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314) has a contact face respectively in contact with one another and sliding or rolling on one another for a direct transmission of the drive torque between the cam disc (108, 208, 308, 408) and the brake plunger (114, 214, 314);
- wherein the brake plunger has an end facing the cam disc, wherein the end facing the cam disc includes a plunger head (112, 212), wherein the plunger head (112, 212) encloses a rolling element (110, 210) mounted by way of bearings (116, 216), the rolling element (110, 210) including the contact face of the brake plunger;
- wherein the contact faces of the cam disc and brake plunger slide or roll on one another for the direct transmission of drive torque between the cam disc and the brake plunger;
- and
- a spring element (236, 336, 436) operatively connected to the electric motor (206) such that energy is stored in a first deflection distance region of the brake plunger, and energy is released and output to the brake plunger in a second deflection distance region of the brake plunger, wherein the second deflection distance follows the first deflection distance in a direction of brake plunger actuation along the plunger axis;
- wherein the spring element (336, 436) stores energy in dependence on a rotational angular range of the cam disc (308, 408), wherein the rotational angular range of the cam disc includes a first rotational angular range and a second rotational angular range following the first angular range in a first rotational direction, and energy is released and output from the spring element (336, 436) in the second rotational angular range.
Dependencies are inferred from the claim text.