Sliding caliper disc brake and brake shoe assembly therefor

A disc brake assembly for applying a braking force to a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, said disc brake assembly comprising

• a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of said rotatable disc,
• first and second pin members releasably and rigidly fixed to said stationary member and extending parallel to the axis,
• a caliper having an inboard leg and an outboard leg, said caliper being supportable in an operative position on said pins for limited sliding movement thereon,
• an inboard brake shoe assembly including an inboard backing plate and a friction pad secured thereto, said inboard backing plate being supportable on said torque receiving arms, on the inboard side of said disc, for axial sliding movement, so that braking torque is transferred to said torque arms,
• an outboard brake shoe assembly including an outboard backing plate, a friction pad secured to one side thereof, and caliper retaining means operable in a first position and inoperable in a second position, when the caliper is supported on said first and second pin members, to restrain said caliper from moving radially outwardly, said caliper retaining means being further operable, when the caliper is supported on said pin members, to restrain undesired circumferential movement thereof, said caliper retaining means being further operable to transmit forces which would cause radially outward or circumferential movement of said caliper to said torque receiving arms, said outboard backing plate being supportable on said torque receiving arms, on the outboard side of said disc, for axial sliding movement, so that braking torque is transferred to said torque arms,
• brake actuation means mounted on said caliper for applying an axial force to said inboard backing plate to urge said inboard friction pad into frictional engagement with said disc thereby causing axial movement of said caliper so that said outboard leg of said caliper urges said outboard friction pad into engagement with said disc,
• wherein, when the second pin is released from said rigid stationary member and said caliper retaining means are in the second position, said caliper is free to rotate about said first pin from the operative position to a service position and
• wherein, when said caliper is in the service position, it does not interfere with the removal of the inboard brake shoe assembly and the outboard brake shoe assembly from the torque receiving arms.

A disc brake assembly for applying a braking force to a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, said disc brake assembly comprising

• a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of said rotatable disc,
• first and second pin members releasably and rigidly fixed to said stationary member and extending parallel to the axis,
• a caliper having an inboard leg and an outboard leg, said caliper being supportable in an operative position on said pins for limited sliding movement thereon,
• an inboard brake shoe assembly including an inboard backing plate and a friction pad secured thereto, said inboard backing plate being supportable on said torque receiving arms, on the inboard side of said disc, for axial sliding movement, so that braking torque is transferred to said torque arms,
• an outboard brake shoe assembly including an outboard backing plate, a friction pad secured to one side thereof, and a caliper retaining plate fixed to the other side thereof, said outboard backing plate being supportable on said torque receiving arms, on the outboard side of said disc, for axial sliding movement, so that braking torque is transferred to said torque arms, said retaining plate comprising a spring clip including a stop engaging surface for engaging a stop on said caliper to restrain radially outward movement thereof and at least one projection extending in an outboard direction from a major surface of said retaining plate to engage the outboard leg of said caliper to restrain circumferential movement thereof,
• brake actuation means mounted on said caliper for applying an axial force to said inboard backing plate to urge said inboard friction pad into frictional engagement with said disc thereby causing axial movement of said caliper so that said outboard leg of said caliper urges said outboard friction pad into engagement with said disc,
• wherein, when the second pin is released from said rigid stationary member and the stop engaging surface of said spring clip is disengaged from said caliper stop, said caliper is free to rotate about said first pin from the operative position to a service position and
• wherein, when said caliper is in the service position, it does not interfere with the removal of the inboard brake shoe assembly and the outboard brake shoe assembly from the torque receiving arms.

A brake shoe assembly for a caliper disc brake comprising a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of the disc, first and second pin members rigidly fixed to the stationary member, a caliper slidably mounted on the pins, and at least one stop provided on the caliper, said brake shoe assembly comprising,

• a friction pad backing plate,
• guide means associated with said backing plate for supporting the brake shoe assembly for sliding movement on said torque receiving arms,
• a friction pad mounted on and secured to said friction pad backing plate and
• stop engaging means including a flexible and resilient spring clip having a surface for engaging the caliper stop when the caliper is mounted on the pins and restraining undesired radially outward movement of said caliper, said stop engaging means being fixed to and integral with said friction pad backing plate.

A brake shoe assembly for a caliper disc brake comprising a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of the disc, first and second pin members rigidly fixed to the stationary member, a caliper slidably mounted on the pins, and at least one stop provided on the caliper, said brake shoe assembly comprising,

• a friction pad backing plate,
• guide means associated with said backing plate for supporting the brake shoe assembly for sliding movement on said torque receiving arms,
• a friction pad mounted on and secured to said friction pad backing plate and
• a caliper retaining plate fixed to said backing plate and including a flexible and resilient spring clip having a surface for engaging the caliper stop when the caliper is mounted on the pins and restraining undesired radially outward movement of said caliper by transmitting forces that would cause such movement through said friction pad backing plate to said stationary member.

A brake shoe assembly for a caliper disc brake comprising a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of the disc, first and second pin members rigidly fixed to the stationary member, a caliper slidably mounted on the pins, and first and second stops provided on the caliper, said brake shoe assembly comprising,

• a friction pad backing plate,
• guide means associated with said backing plate for supporting the brake shoe assembly for sliding movement on said torque receiving arms,
• a friction pad mounted on and secured to said friction pad backing plate and
• a caliper retaining plate fixed to said backing plate and comprising first and second flexible and resilient spring clips, first and second surfaces on said first and second spring clips, respectively, for engaging the first and second caliper stops when the caliper is mounted on the pins and restraining undesired radially outward movement of said caliper by transmitting forces that would cause such movement through said friction pad backing plate to said stationary member, said retaining plate further comprising caliper engaging projections extending from a major surface of said brake shoe assembly for restraining undesired movement of said caliper in a circumferential direction by transmitting forces that would cause such movement through the backing plate to said stationary member.

A caliper retaining plate for use with a brake shoe assembly for a caliper disc brake comprising a rotatable disc having an axis of rotation and an inboard and an outboard frictional surface, a rigid stationary member inboard of said disc and having two circumferentially spaced torque receiving arms axially extending above and across the periphery of the disc, first and second pin members rigidly fixed to the stationary member, a caliper slidably mounted on the pins, and first and second stops provided on the caliper,

• the brake shoe assembly comprising a friction pad backing plate, guide means associated with said backing plate for supporting the brake shoe assembly for sliding movement on said torque receiving arms, and a friction pad mounted on and secured to said friction pad backing plate, said caliper retaining plate comprising,
• means for fixing said caliper retaining plate relative to said backing plate,
• first and second spring clips including first and second surfaces, respectively, for engaging the first and second caliper stops when the caliper is mounted on the pins and restraining undesired radial movement of said caliper by transmitting forces that would cause such movement through said friction pad backing plate to said stationary member, said retaining plate further comprising caliper engaging projections extending from a major surface thereof for restraining undesired movement of said caliper in a circumferential direction by transmitting forces that would cause such movement through the backing plate to said stationary member.