Ventilated brake disc

1. A brake disc comprising:

a support cap, intended to be connected to a wheel hub of a vehicle;

a braking band, intended to cooperate with a caliper of a disc brake, comprising two plates connected by a plurality of connecting members which define ventilation ducts;

wherein all connecting members of the brake disk are included in the plurality of connecting members;

wherein all of said connecting members having different shapes and/or dimensions are arranged according to a module which repeats an integral number of times along the braking band, and

the connecting members are pillars having a relatively squat section;

wherein

each of said pillars defines a straight median line;

said module consists of pillars arranged in three circumferential arrays including a radially inner array, a radially outer array, and a radially intermediate array, wherein

the radially inner array consists of only one short lozenge pillar and

the radially intermediate array consists of four lozenge pillars in the following order: a medium lozenge pillar, two long lozenge pillars, and a medium lozenge pillar.

2. The brake disc according to claim 1 , wherein the radially outer array comprises four identical, equally spaced teardrop pillars.

3. The brake disc according to claim 1 , wherein the braking band comprises dragging members which are manufactured in an integral manner, and as a single piece with the braking band wherein said dragging members have roots having a Y or T shape.

4. The brake disc according to claim 2 , wherein

the braking band has an inner circumference and an outer circumference;

each short lozenge pillar extends from the inner circumference outwardly up to a first intermediate circumference (C 8 ); the teardrop pillars extend from the outer circumference inwardly up to a second intermediate circumference (C 9 ); and the medium lozenge pillars extend from the second intermediate circumference (C 9 ) inwardly up to the first intermediate circumference (C 8 ).

5. The brake disc according to claim 4 , wherein the radial distances between the inner circumference and the first intermediate circumference C 8 ); between the first intermediate circumference (C 8 ) and the second intermediate circumference (C 9 ); and between the second intermediate circumference (C 9 ) and said outer circumference are substantially equal.

6. The brake disc according to claim 2 , wherein the teardrop pillars of the outer array and the medium and long lozenge pillars of the intermediate array are offset one from the other; that is, in which the inward extension of the median line of a teardrop pillar inserts essentially halfway between two lozenge pillars belonging to the intermediate array.

7. The brake disc according to claim 2 , wherein the short lozenge pillar is offset relative to the medium and long lozenge pillars of the intermediate array and it is aligned relative to a teardrop pillar of the radially outer array.

8. The brake disc according to claim 3 , wherein the roots of the dragging members comprise a section widening in the circumferential direction.

9. The brake disc according to any claim 3 , wherein the roots of the dragging members comprise a section widening in the axial direction.