Electric wear-adjusting device of a disc brake, a corresponding disc brake, and method for measuring and setting the air play and for measuring wear

An electric wear-compensating readjustment apparatus for readjustment for compensation of friction surface wear on brake pads and brake disk of a disk brake an application apparatus, the electric wear-compensating readjustment apparatus comprising:

• an electric motor;
• gearing configured to be rotated by the electrical motor;
• an output element configured to be rotated by the gearing;
• and
• a synchronizing wheel,
• wherein the output element is arranged co-axially with a rotation axis of the electric motor, rotationally conjointly connected directly to the synchronizing wheel and arranged to be rotated by the gearing when the electric motor rotates.

A motor vehicle disk brake, comprising:

• an application apparatus having a brake rotary lever and at least one spindle unit with a threaded plunger, and
• at least one electric wear-compensating readjustment apparatus having
• an electric motor;
• gearing;
• an output element;
• and
• a clamping sleeve having inwardly projecting longitudinal ribs on an inner side,
• wherein the output element is connected rotationally conjointly to the clamping sleeve.

A motor vehicle disk brake, comprising:

• an application apparatus having a brake rotary lever and two spindle units each having a threaded plunger,
• at least one electric wear-compensating readjustment apparatus having
• an electric motor;
• gearing;
• an output element;
• a clamping sleeve having inwardly projecting longitudinal ribs on an inner side;
• a synchronizing unit;
• and
• a crossmember,
• wherein
• the output element at least partially encloses a first threaded plunger of a first one of the two spindle units, and
• a coupling section of the output element is rotationally conjointly connected to a first synchronizing wheel of the synchronizing unit or is formed in one piece with the first synchronizing wheel.

A method for air gap measurement and air gap setting of a disk brake that includes an application apparatus having a brake rotary lever and at least one spindle unit with a threaded plunger, and at least one electric wear-compensating readjustment apparatus having an electric motor, gearing configured to be rotated by the electrical motor, an output element configured to be rotated by the gearing, and a clamping sleeve having inwardly projecting longitudinal ribs on an inner side, the output element being connected rotationally conjointly to the clamping sleeve and is arranged to be rotated by the gearing when the electric motor rotates, comprising the acts of:

• at least one of measuring a present air gap between a brake disk and brake pads of the disk brake and setting a new air gap;
• and
• communicating with further wear-compensating readjustment apparatuses of an associated vehicle via data interfaces, and
• monitoring and performing plausibility checks on the measured air gap and/or set air gap.

A motor vehicle disk brake, comprising:

• an application apparatus having a brake rotary lever and two spindle units each having a threaded plunger,
• at least one electric wear-compensating readjustment apparatus having
• an electric motor;
• gearing;
• an output element;
• a clamping sleeve having inwardly projecting longitudinal ribs on an inner side;
• a synchronizing unit;
• and
• a crossmember,
• wherein
• the output element is connected rotationally conjointly to the clamping sleeve;
• the crossmember is configured to support the two spindle units in threaded engagement on the crossmember and to cooperate with the brake rotary lever and a synchronizing device with synchronizing wheels arranged on the crossmember to provide wear-compensating readjustment,
• the clamping sleeve is mounted onto a first threaded plunger of a first one of the two spindle units and at least partially encloses the first threaded plunger, and
• a free end of the clamping sleeve is rotationally conjointly coupled to a first synchronizing wheel of the synchronizing unit.