F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/139
F16D 55/22 (2006.01) F16D 65/14 (2006.01) F16D 65/56 (2006.01)
Patent
CA 1206425
SLACK ADJUSTER FOR A DISC BRAKE Abstract of the Disclosure A slack adjuster is for a disc brake of the type which includes a disc mounted for rotation about an axle and a caliper brake having a housing mounted on the axle in alignment with a friction surface of the disc. A braking piston is mounted in the housing for axial movement toward and away from the friction surface of the disc. Brake actuation produces rotation of a powershaft mounted in the housing which will in turn produce a corresponding axial movement of the braking piston through a non-rotating powershaft nut. An adjusting sleeve between the piston and the powershaft nut is threadably coupled to the piston and capable of rotation in a first direction relative thereto to adjust the axial position of the piston toward the disc. A clearance sensing ring is mounted about the adjusting sleeve for axial movement therewith and has an angled groove in its outer surface for receipt therein of a cam pin which is secured to the housing. The angled groove has opposite parallel walls with an axial distance therebetween equal to an axial thickness of the pin plus a predetermined maximum distance corresponding to the desired running clearance for the piston. Camming between the groove and the pin will cause rotation of the clearance sensing ring in the first direction when the axial movement of the adjusting sleeve toward the disc exceeds the predetermined maximum distance and in an opposite direction when the axial movement of the adjusting sleeve away from the disc exceeds the predetermined maximum distance. A clutch element is mounted on the adjusting sleeve with the clearance sensing ring mounted thereon to produce corresponding rotation of the adjusting sleeve in the first direction until the piston contacts the friction surface of the disc and to prevent corresponding rotation of the adjusting sleeve in the second direction.
450570
Kirby Eades Gale Baker
Rockwell International Corporation
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