Braking band of a disc for disc brake of ventilated type

A braking band of a disc brake disc of ventilated type, said braking band extending between an inner diameter, near a rotation axis (X-X) of the braking band, and an outer diameter, far from said rotation axis (X-X), said rotation axis (X-X) defining an axial direction (X-X);

• said braking band defining a radial direction (R-R), orthogonal to said axial direction (X-X), and a circumferential direction (C-C), orthogonal to said axial direction (X-X) and to said radial direction (R-R), and a tangential direction (T-T) orthogonal to said axial direction (X-X) and said radial direction (R-R);
• said braking band comprising two mutually facing plates;
• said two mutually facing plates comprising inner surfaces, either directly or indirectly facing and delimiting a gap;
• said two mutually facing plates each comprising a plate body having a predetermined extension in the axial direction (X-X) or a predetermined plate thickness;
• said two mutually facing plates being joined to each other by heat dissipating and connecting elements, hereinafter connecting elements;
• said connecting elements being shaped as columns, ribs or fins which project from one plate of said two mutually facing plates towards an opposite plate of said two mutually facing plates, forming bridges which connect the two mutually facing plates to each other;
• wherein
• one plate of the two mutually facing plates comprises at least one shaped pin which projects from said plate into said gap reaching the opposite plate of said two mutually facing plates, forming at least one localized narrowing of said gap and a thickening of the plate body, creating a localized increase of said predetermined plate thickness;
• wherein
• said at least one shaped pin remains separated from each connecting element, wherein a thickness of at least one plate of said two mutually facing plates about said at least one shaped pin is substantially equal to said predetermined plate thickness;
• and
• wherein said at least one shaped pin extends forming at least two separate shaped pin branches;
• wherein said connecting elements are grouped into at least two ranks arranged circumferentially;
• wherein
• a first rank of said at least two ranks is an inner rank internally arranged in the radial direction or towards said rotation axis (X-X) near said inner diameter;
• and wherein
• a second rank of said at least two ranks is an outer rank radially located further from said rotation axis (X-X) near said outer diameter;
• and wherein
• said braking band further comprises at least one of the following features or a combination thereof:
• at least one third or intermediate rank is radially arranged between said inner rank and said outer rank;
• each connecting element of said outer rank comprises three shaped pins or a combination of shaped pins facing said connecting element on three sides, and further shaped pins;
• said at least one shaped pin is at least a plurality of shaped pins, and each plurality of shaped pins is arranged between the connecting elements of a same rank.

A braking band of a disc brake disc of ventilated type, said braking band extending between an inner diameter, near a rotation axis (X-X) of the braking band, and an outer diameter, far from said rotation axis (X-X), said rotation axis (X-X) defining an axial direction (X-X);

• said braking band defining a radial direction (R-R), orthogonal to said axial direction (X-X), and a circumferential direction (C-C), orthogonal to said axial direction (X-X) and to said radial direction (R-R), and a tangential direction (T-T) orthogonal to said axial direction (X-X) and said radial direction (R-R);
• said braking band comprising two mutually facing plates;
• said two mutually facing plates comprising inner surfaces, either directly or indirectly facing and delimiting a gap;
• said two mutually facing plates each comprising a plate body having a predetermined extension in the axial direction (X-X) or a predetermined plate thickness;
• said two mutually facing plates being joined to each other by heat dissipating and connecting elements, hereinafter connecting elements;
• said connecting elements being shaped as columns, ribs or fins which project from one plate of said two mutually facing plates towards an opposite plate of said two mutually facing plates, forming bridges which connect the two mutually facing plates to each other;
• wherein
• one plate of the two mutually facing plates comprises at least one shaped pin which projects from said plate into said gap reaching the opposite plate of said two mutually facing plates, forming at least one localized narrowing of said gap and a thickening of the plate body, creating a localized increase of said predetermined plate thickness;
• wherein
• said at least one shaped pin remains separated from each connecting element, wherein a thickness of at least one plate of said two mutually facing plates about said at least one shaped pin is substantially equal to said predetermined plate thickness;
• and wherein
• said at least one shaped pin extends forming at least two separate shaped pin branches;
• wherein said connecting elements are grouped into at least two ranks arranged circumferentially;
• wherein
• a first rank of said at least two ranks is an inner rank internally arranged in the radial direction or towards said rotation axis (X-X) near said inner diameter;
• and wherein
• a second rank of said at least two ranks is an outer rank radially located further from said rotation axis (X-X) near said outer diameter;
• and wherein
• said braking band further comprises at least one of the following features or a combination thereof:
• at least one third or intermediate rank is radially arranged between said inner rank and said outer rank;
• each connecting element of said outer rank comprises three shaped pins or a combination of shaped pins facing said connecting element on three sides, and further shaped pins;
• said at least one shaped pin is at least a plurality of shaped pins, and each plurality of shaped pins is arranged between the connecting elements of a same rank,
• wherein at least some of said connecting elements are fins or ribs having, on a plane substantially parallel to air flow along the gap, an elongated shape section in the radial direction (R-R);
• and wherein said braking band further comprises at least one of the following features or a combination thereof:
• the connecting elements close to the outer diameter or outer rank have an elongated drop-shaped section in the radial direction (R-R) on a plane substantially parallel to air flow along the gap;
• at least two of said connecting elements have, on a plane substantially parallel to air flow along the gap, a diamond or rhombus-shaped section with four vertices joined by four sides, said four sides being rectilinear in shape;
• all the shaped pins are arranged in a circular portion of said gap near said outer diameter;
• all the shaped pins are arranged in a circular portion of said gap near which the outer rank of connecting elements is present.