| CPC F16D 65/128 (2013.01) [F16D 2065/1308 (2013.01); F16D 2065/1328 (2013.01)] | 11 Claims |
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1. A braking band of a disc for a disc brake 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 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 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 being joined to each other by connecting elements;
said connecting elements projecting from one of the two mutually facing plates and reaching the opposite plate, thereby forming bridges connecting the two mutually facing plates to each other;
wherein
a first series of fins of said connecting elements is each a fin which is in a single piece and extends from near said inner diameter to near said outer diameter;
each fin of said first series of fins comprises a fin outer end portion located near said outer diameter;
the fin outer end portion comprises a predetermined extension along an outer circumferential width;
each fin of said first series of fins comprises a fin inner end portion located near said inner diameter;
said fin inner end portion comprises a predetermined extension along an inner circumferential width; wherein
considering a section taken along a section plane comprising the radial direction (R-R) and the circumferential (C-C) direction, the section made by passing through a mean air flow point that runs through said gap, said outer circumferential width is greater than said inner circumferential width; and
wherein said fin outer end portion of each fin of said first series of fins faces only an adjacent fin of said first series of fins on both sides in the circumferential direction (C-C);
wherein said braking band comprises at least one further connecting element which connects said plates and comprises an extension in radial direction (R-R) lower than the band height, said connection element being at least one short fin,
wherein said at least one short fin is arranged directly facing at least one fin near said inner diameter and extends radially going towards said outer diameter for an extension not greater than ⅓ of the height of the distance between said inner diameter and said outer diameter or band height.
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