A disc brake for a vehicle, particularly for a commercial vehicle, includes a brake caliper which straddles a brake disc and in which an application device is arranged, a single-piece rotary lever which has an eccentric element, and at least one brake plunger which is designed as a power screw arrangement having a rotational axis and with which, when the rotary lever is actuated, at least one brake pad can be pressed against the brake disc. The rotary lever is arranged in the brake caliper such that it can pivot relative thereto, and is supported directly or by way of one or more elements connected therebetween, on said brake caliper, in at least one support region. The rotary lever, which can pivot relative to the brake plunger, has at least one convexly-formed section on the side thereof that lies opposite the support point on the brake caliper, and this section lies against a matching concave end face in the axial extension of the rotational axis of said power screw arrangement.

A disc brake, preferably actuated by compressed air, for a motor vehicle, has a brake caliper which has a brake application section with a brake application device with a rotary brake lever, at least one wear adjusting device for adjusting wear of brake pads, and a brake disc with a synchronization unit which includes an adjusting device, a drive device and a synchronizer. The adjusting device and the drive unit are inserted in each case into a threaded plunger of a spindle unit and are attached by way of a mounting arrangement on a bearing wall of the brake application section of the brake caliper. The synchronization unit is installed with the adjusting device and the drive device as a preassembled group into the brake application section of the brake caliper, wherein the synchronizer is arranged in the region of the mounting arrangements on the bearing wall within the brake application section. A method for installing a synchronization unit is provided.

A disc brake, in particular for a motor vehicle, has a brake application device, preferably with a brake rotary lever, at least one spindle unit having at least one threaded tube with an external thread that cooperates with an internal thread of a bridge, and at least one bidirectional wear adjustment device which is coupled to the brake application device, preferably to the brake rotary lever. The bidirectional wear adjustment device has an adjustment arrangement and at least one preloading arrangement which is designed to influence a flank position of a thread pairing of the external thread of the at least one threaded tube and the associated internal thread of the bridge.

A method is provided for determining an air gap of a vehicle brake, in particular for a motor vehicle, wherein the vehicle brake includes a clamping device, a wear adjustment device, a sensor apparatus for detecting an actuation stroke of the clamping device, and a vehicle control system. The method performs the following steps: (S1) receiving a measurement signal of the actuation stroke, which measurement signal is provided by the sensor apparatus, within a previously specifiable time window during a braking process and storing the measurement signal as data pairs of actuation stroke and time during a braking process; (S2) calculating a time derivative of the measurement signal in the time window by a suitable algorithm in order to determine a point in time at a maximum; and (S3) determining the air gap on the basis of the point in time thus determined and forwarding the value of the air gap thus determined to the vehicle control system. A vehicle brake is equipped with a device for determining an air gap for performing the method.

A disc brake, in particular for a motor vehicle, includes a brake-application device having a brake lever. An adjustment device, which is coupled to the brake-application device, in particular to the brake lever, is provided in order to adjust for the wear of brake pads and a brake disc. A wear sensor detects a wear value of brake pads and the brake disc. A brake control unit controls the disc brake. The disc brake has a clearance-monitoring device having a control device, which is connected to the wear sensor and the brake control unit. A corresponding method for monitoring a clearance of a disc brake is provided.

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles extend into and are connected with each piston. A clutch unit is connected to the spindles and includes a motor. The clutch unit has a first condition allowing for rotation of the spindles in response to hydraulic pressure applied to the pistons such that the pistons are axially movable within the passages and relative to the spindles into engagement with the brake pad. The clutch unit has a second condition for rotating the spindles to drive the pistons into the brake pad and apply the parking brake.

A sensor device for a disc brake has a sensor gearing which can be coupled to at least one encoder, wherein the sensor gearing is arranged in a housing as a planetary gear mechanism and has an input for a first variable, which can be detected by the sensor device and which is associated with wear of the disc brake, and has an input for a second variable, which can be detected by the sensor device and which is associated with an operating movement of the disc brake. The sensor device can be changed over from a first state for detecting the first variable, which is associated with wear of the disc brake, and the second variable, which is associated with an operating movement of the disc brake, to a second state for detecting only the first variable, which is associated with wear of the disc brake.

A brake application mechanism of a disc brake includes a pressure piece in contact with a brake pad, and a cylindrical threaded element that is retained on the pressure piece in such a way as to rotate therewith. The pressure piece and the threaded element that is connected thereto are designed as separate parts.

A disc brake, for a motor vehicle, has a brake caliper with a clamping section, which is equipped with a clamping device with a brake rotary lever, at least two threaded pistons, an adjustment device, and a driver device. A synchronization mechanism for synchronizing the rotational movements of the threaded pistons is arranged outside of the housing of the brake caliper within a sealed cover on the clamping section of the brake caliper. The synchronization mechanism has at least one synchronizing element and two synchronizing wheels, a first synchronizing wheel of which is coupled to one threaded piston and a second synchronizing wheel of which is coupled to the other threaded piston. The synchronization mechanism is arranged on the clamping section of the brake caliper (3) so as to be guided about a lever housing of the brake rotary lever. The lever housing protrudes from the clamping section of the brake caliper.

A brake application device of a disc brake for a commercial vehicle has a brake lever that acts on a brake plunger, wherein the brake plunger has an adjusting spindle provided with an external thread and a pressure piece, which bears against a radially aligned support surface of the adjusting spindle facing a brake pad. The outer diameter of the support surface is at least 60% of the diameter of the pressure surface of the pressure piece.