The invention relates to a wheel brake for a motor vehicle including an electromechanical actuating device and a hydraulic actuating device, which are redundant. In this way, the likelihood of failure of the wheel brake is reduced. A self-boosting device increases a braking force of the wheel brake,
The invention relates to a wheel brake for a motor vehicle including an electromechanical actuating device and a hydraulic actuating device, which are redundant. In this way, the likelihood of failure of the wheel brake is reduced. A self-boosting device increases a braking force of the wheel brake, so that an (underpressure) brake booster can be dispensed with. Wheel slip control is possible in a simple way by hydraulic actuation of the wheel brake and superposition of a braking force regulation on the electromechanical actuating device. The wheel brake includes a support member on the side of a friction brake lining opposite a brake body. The support member has two wedge inclines and a flattened middle portion on a side opposite the friction brake lining. The pressure fluid actuating device has a tappet resting on the flattened middle portion.
대표청구항▼
We claim: 1. In a wheel brake for a motor vehicle, including a friction brake lining (20) and a plurality of actuating devices with which the friction brake lining can be pressed against a brake body (14) for braking, the improvement wherein the actuating devices comprise both an electromechanical
We claim: 1. In a wheel brake for a motor vehicle, including a friction brake lining (20) and a plurality of actuating devices with which the friction brake lining can be pressed against a brake body (14) for braking, the improvement wherein the actuating devices comprise both an electromechanical actuating device (16) and a pressure fluid actuating device (17) for pressing the friction brake lining (20) against the brake body (14); wherein the actuating devices (16, 17) are redundant and the contact-pressure forces exerted by the two actuating devices (16, 17) on the friction brake lining (20) are added together; and a support member (22) on the side of the friction brake lining opposite the brake body, the support member having two wedge inclines (24) and a flattened middle portion on a side opposite the friction brake lining, the pressure fluid actuating device having a tappet (48) resting on the flattened middle portion. 2. The wheel brake in accordance with claim 1, wherein the support member (22) is a part of a self-boosting device (18), which converts a frictional force, exerted upon braking by the rotating brake body (14) on the friction brake lining (20) pressed against the brake body (14), into a contact pressure that presses the friction brake lining (20) against the brake body (14). 3. The wheel brake in accordance with claim 1, wherein the support member (22) is a part of a common self-boosting device (18) for the electromechanical actuating device (16) and the pressure fluid actuating device (17). 4. The wheel brake in accordance with claim 1, wherein the electromechanical actuating device (16) comprises a wheel-slip control system (62, 64), which is superimposed on the pressure fluid actuation device (17) of the wheel brake (10). 5. The wheel brake in accordance with claim 1, wherein the wheel brake (10) is a disk brake. 6. The wheel brake in accordance with claim 1, wherein the electromechanical actuating device (16) and the pressure fluid actuating device (17) are disposed on the same side of the brake body (14). 7. In a wheel brake for a motor vehicle, including a friction brake lining (20) and a plurality of actuating devices with which the friction brake lining can be pressed against a brake body (14) for braking, the improvement wherein the actuating devices comprise both an electromechanical actuating device (16) and a pressure fluid actuating device (17) for pressing the friction brake lining (20) against the brake body (14); wherein the actuating devices (16, 17) are redundant and the contact-pressure forces exerted by the two actuating devices (16, 17) on the friction brake lining (20) are added together; and a support member (22) on the side of the friction brake lining opposite the brake body, the support member having two wedge inclines (24) and a flattened middle portion on a side opposite the friction brake lining, the pressure fluid actuating device having a tappet (48) resting on the flattened middle portion, wherein the electromechanical actuating device (16) comprises a wheel-slip control system (62, 64), which is superimposed on the pressure fluid actuating device (17) of the wheel brake (10), and wherein, in wheel slip control, a maximum possible contact pressure of the electromechanical actuating device (16) is greater than a contact pressure of the pressure fluid actuating device (17). 8. A vehicle brake system (52) comprising both electromechanically and hydraulically actuatable wheel brakes (10) on a front axle, and solely electromechanically actuatable wheel brakes (54) on a rear axle, the front axle wheel brakes including both an electromechanical actuating device (16) and a pressure fluid actuating device (17) for pressing a friction brake lining (20) against a brake body (14), wherein the electromechanical actuating device (16) and the pressure fluid actuating device (17) for the front axle wheel brakes are redundant and the contact-pressure forces exerted by the electromechanical actuating device (16) and the pressure fluid actuating device (17) for the front axle wheel brakes on the friction brake lining (20) are added together; and a support member (22) on the side of the friction brake lining opposite the brake body, the support member having two wedge inclines (24) and a flattened middle portion on a side opposite the friction brake lining, and the pressure fluid actuating device having a tappet (48) resting on the flattened middle portion.
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