Band spring and brake pad assembly, brake caliper, brake pad

A band spring and brake pad assembly (1) for a brake caliper (6), wherein said assembly (1) defines an axial direction (A-A), a radial direction (R-R) perpendicular to the axial direction (A-A), and a tangential direction (C-C) perpendicular to both said axial direction (A-A), and said radial direction (R-R),

• wherein said assembly (1) comprises:
• a brake pad (5) comprising a plate (10) and a friction material (11) supported by the plate (10), wherein the friction material (11) is adapted to contact a braking surface (4) of a brake disc (3), wherein said brake disc (3) has a rotation axis (X-X) about which it rotates, wherein the rotation axis (X-X) is parallel to the axial direction (A-A), wherein the plate (10) comprises a first tangentially outer edge (14) and a second tangentially outer edge (15), which are diametrically opposite or specular relative to a centerline plane (A-R), wherein said centerline plane (A-R) is parallel to said axial direction (A-A) and said radial direction (R-R),
• wherein the plate (10) comprises a radially outer edge (16) and a radially inner edge (17), wherein said radially outer edge (16) faces at least partially along said radial direction (R-R) radially outwards (R-O) away from the rotation axis (X-X), wherein said radially inner edge (17) faces at least partially along said radial direction (R-R) radially inwards (R-I) towards the rotation axis (X-X),
• wherein said radially outer edge (16) comprises a thrust portion (12),
• wherein said assembly (1) comprises:
• a band spring (2) comprising a coupling portion (8) configured to connect to a caliper body (7), at least one spring thrust portion (9) configured to contact said brake pad (5) at said thrust portion (12) to apply an elastic bias on said brake pad (5) to move it away from the brake disc (3), wherein the spring thrust portion (9) is connected to said coupling portion (8),
• wherein said thrust portion (12) is delimited at least by a ramp (18), wherein the ramp (18) is inclined at least relative to the axial direction (A-A) and said radial direction (R-R), wherein said ramp (18) faces the same side as the friction material (11),
• wherein said ramp (18) extends radially and axially away from said friction material (11) between a radially inner edge (19) to a radially outer edge (20),
• wherein said radially outer edge (20) extends at least in the radial direction (R-R) and at least in the tangential direction (C-C) crossing said centerline plane (A-R),
• wherein said radially outer edge (20) comprises at least a first convex portion (21),
• wherein said first convex portion (21) forms a first concavity facing radially inwards (R-I),
• wherein said first convex portion (21) comprises a first central part (22), a first side part (23) and a second side part (24), wherein the first central part (22) is interposed between the first side part (23) and the second side part (24),
• wherein the band spring (2) is adapted to apply, with said spring thrust portion (9), said elastic bias at least partially on the first central part (22) of said first convex portion (21), biasing said brake pad (5) at least away from said brake disc (3) in the axial direction (A-A), avoiding contacting the first side part (23) and the second side part (24) of said first convex portion (21).

A brake pad (5) for a brake caliper (7), wherein said brake pad (5) defines an axial direction (A-A), a radial direction (R-R) perpendicular to the axial direction (A-A), and a tangential direction (C-C), perpendicular to both said axial direction (A-A) and said radial direction (R-R),

• comprising a plate (10) and a friction material (11) supported by the plate (10), wherein the friction material (11) is adapted to contact a braking surface (4) of a brake disc (3),
• wherein said brake disc (3) has a rotation axis (X-X) about which it rotates, wherein the rotation axis (X-X) is parallel to the axial direction (A-A),
• wherein the plate (10) comprises a first tangentially outer edge (14) and a second tangentially outer edge (15), which are diametrically opposite or specular relative to a centerline plane (A-R), wherein said centerline plane (A-R) is parallel to said axial direction (A-A) and said radial direction (R-R),
• wherein the plate (10) comprises a radially outer edge (16) and a radially inner edge (17) wherein said radially outer edge (16) faces at least partially along said radial direction (R-R) radially outwards (R-O) away from the rotation axis (X-X), wherein said radially inner edge (16) faces at least partially along said radial direction (R-R) radially inwards (R-I) towards the rotation axis (X-X),
• wherein said radially outer edge (16) comprises a thrust portion (12) adapted to be contacted by a band spring (2) to receive an elastic bias away from the brake disc (3),
• wherein said thrust portion (12) is delimited at least by a ramp (18), wherein the ramp (18) is inclined at least relative to the axial direction (A-A) and said radial direction (R-R), wherein said ramp (18) faces the same side as the friction material (11),
• wherein said ramp (18) extends radially and axially away from said friction material (11) between a radially inner edge (19) to a radially outer edge (20),
• wherein said radially outer edge (20) extends at least in the radial direction (R-R) and at least in the tangential direction (C-C) crossing said centerline plane (A-R),
• wherein said radially outer edge (20) comprises at least a first convex portion (21),
• wherein said first convex portion (21) forms a first concavity facing radially inwards (R-I),
• wherein said first convex portion (21) comprises a first central part (22), a first side part (23), and a second side part (24), wherein said first central part (22) is interposed between said first side part (23) and said second side part (24), so that the band spring (2) is adapted to apply said elastic bias at least partially on the first central part (22) of said first convex portion (21), biasing said brake pad (5) at least away from said brake disc (3) in the axial direction (A-A), while avoiding contacting the first side part (23) and the second side part (24) of said first convex portion (21).