Disc brake adjusting device having an output side coupling ring with a defined working rotational angle

A pneumatic disc brake, comprising:

• a caliper;
• a rotary lever-actuated brake application device arranged in the caliper, the brake application device comprising an adjusting spindle;
• a wear adjustor operatively configured to adjust the adjusting spindle to account for wear of brake pads and a brake disc of the disc brake;
• wherein the wear adjustor is attached to the caliper by a bearing disc;
• the wear adjustor comprising:
• an axial bearing, wherein the axial bearing includes a drive-output side portion of one of the bearing disc or a bearing surface rotationally fixed relative to the bearing disc as a drive-input side of the axial bearing, a drive-input side of the drive ring as a drive-output side of the axial bearing and axial bearing balls located between the bearing disc and the drive ring;
• a ball ramp clutch having a freewheel function, wherein the ball ramp clutch includes a drive-output side of the drive ring as a drive-input side of the ball ramp clutch, a drive-input side of a clutch ring as the drive-output side of the ball ramp clutch and ball ramp clutch balls located between the drive ring and the clutch ring;
• and;
• a cone clutch, wherein the cone clutch includes a drive-output side of the clutch ring as a drive-input side of the cone clutch, a spring sleeve for a cylindrical spring having a tapered cone portion at a drive-input end of the spring sleeve as a drive-output side of the cone clutch and cone clutch balls located between the clutch ring and the tapered cone portion of the spring sleeve,
• wherein the clutch ring is operatively configured for a working angle of rotation limited by at least one stationary stop,
• the at least one stationary stop is integrally formed on a first end section of a collar bush at a drive-output end of the collar bush extending axially through the ball ramp clutch and the clutch ring, and
• the drive-input side of the axial bearing is the bearing surface rotationally fixed relative to the bearing disc, and the bearing surface rotationally fixed relative to the bearing disc is formed by a second end section of the collar bush at a drive-input end of the collar bush axially opposite the first end section.