Braking band for a brake disk
AssigneeFreni Brembo S.p.A.
InventorsGiuseppe Meroni, Simone Ravasio, Leone Oberti
Life of this patent
Estimating the term…
Abstract
A braking band (2) for a disk-brake disk (1) which is capable of exceptionally quiet braking comprises at least two plates (3, 3′) connected to one another by connecting elements (4), in which the space between the plates (3, 2′) forms an internal air-duct (7) for the cooling of the braking band (2). At least one of the cooling of the braking band (2). At least one of the plates (3, 3′) has, in one of its surfaces (8, 8′) defining the air-ducts (7), at least one groove (10, 10′) which extends along at least a portion of an orbit around the axis of symmetric (s) of the disk (1) and the cross-section of which becomes wider towards the air-duct (7).
Claims55
A braking band (2) for a disk-brake disk (1), comprising at least two plates (3, 3′) connected to one another by connecting elements (4), in which the space between the plates forms an internal air-duct (7) for the cooling of the braking band (2), characterized in that at least one of the plates (3, 3′) has, in one of its surfaces (8, 8′) defining the air-ducts (7), at least one groove (10, 10′) which extends substantially along at least a portion of an orbit around the axis of symmetry (s) of the disk (1) and has a cross-section which becomes wider, towards the air-duct (7), for a predominant portion of its depth.
A braking band according to any one of the preceding claims in which at least one groove (10, 10′) has a depth greater than the depth of at least one other groove (10, 10′).
A braking band according to any one of the preceding claims in which at least one groove (10, 10′) has a width greater than the width of at least one other groove (10, 10′).
A braking band according to any one of the preceding claims in which all of the grooves (10, 10′) of at least one of the surfaces (8, 8′) inside the braking band (2) are uniformly spaced apart radially.
A braking band according to any one of the preceding claims in which a first surface (8) defining the air-duct (7) has grooves (10) which are out of alignment with grooves (10′) provided in a facing, second surface (8′) defining the air-duct (7).
A braking band according to any one of the preceding claims in which the grooves (10, 10′) extend beneath the connecting elements (4) between two plates (3, 3′) of the braking band (2).
A braking band according to any one of the preceding claims in which the grooves (10, 10′) are produced by casting, by means of protuberances (37, 37′) on an annular band (27) of a core (20).
A braking band according to any one of the preceding claims in which the grooves (10, 10′) have a trapezoidal shape in cross-section.
A braking band according to any one of the preceding claims in which the edges of the groove (10, 10′) are rounded.
A braking band according to any one of the preceding claims in which at least one of the grooves (10, 10′) on the surface (8, 8′) remote from the braking surface (9, 9′) of each braking plate (3, 3′) has a depth (13) equal to the minimum permissible thickness of the respective, worn braking plate (3, 3′).
A disk-brake disc comprising a braking band (2) according to any one of the preceding claims.
A core (20) for the production of a braking band (2) of a disk-brake disk (1), the band having at least two plates (3, 3′) connected to one another by connecting elements (4), in which the space between the plates forms an internal air-duct (7), defined by surfaces (8, 8′), for the cooling of the braking band (2), characterized in that the core (20) is suitable for forming, in at least one of the surfaces (8, 8′) defining the air-ducts (7), at least one groove (10, 10′) which extends along at least a portion of an orbit around the axis of symmetry (s) of the disk (1) and has a cross-section which becomes wider, towards the air-duct (7), for a predominant depth of the groove.
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which at least one of the grooves (10, 10′) is annular.
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which at least one groove (10, 10′) has a depth greater than the depth of at least one other groove (10, 10′).
A core (20) according to any one of the preceding claims, suitable for producing a braking band (2) in which at least one groove (10, 10′) has a width greater than the width of at least one other groove (10, 10′).
A core (20) according to any one of the preceding claims, suitable for producing a braking band (2) in which all of the grooves (10, 10′) of at least one of the surfaces (8, 8′) inside the braking band (2) are uniformly spaced apart radially.
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which a first surface (8) defining the air-duct (7) has grooves (10) which are but of alignment with grooves (10′) provided in a facing, second surface (8′) defining the air-duct (7).
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which the grooves (10, 10′) extend beneath the connecting elements (4) between two plates (3, 3′) of the braking band (2).
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which the grooves (10, 10′) are produced by casting, by means of protuberances (37, 37′) on an annular band (27) of the core (20).
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which the grooves (10, 10′) have a trapezoidal shape in cross-section.
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which the edges of the groove (20, 10′) are rounded.
A core (20) according to any one of the preceding claims suitable for producing a braking band (2) in which at least one of the grooves (10, 10′) on the surface (8, 8′) remote from the braking surface (9, 9′) of each braking plate (3, 3′) has a depth (13) equal to the minimum permissible thickness of the respective, worn braking plate (3, 3′).
A core (20) according to any one of the preceding claims suitable for producing a disk-brake disk.
A method of producing a braking band (2) of a disk-brake disk (1) by casting, the band comprising at least two plates (3, 3′) connected to one another by connecting elements (4), in which the space between the plates forms an internal air-duct (7) defined by surfaces (8, 8′), characterized in that it provides for the use of a core (20) suitable for forming, in at least one of the surfaces (8, 8′) defining the air-ducts (7), at least one groove (10, 10′) which extends along at least one portion of an orbit around the axis of symmetry (s) of the disk (1), preferably around a circle concentric with the axis of symmetry (s) and having a cross-section which becomes wider towards the air-duct (7) for a predominant portion of its depth.
Dependencies are inferred from the claim text.