A disc brake for railway vehicles comprising a pad and a disc on which the pad acts. The pad comprises a base plate and a plurality of friction elements fixed to the base plate. The friction elements comprise first friction elements made with a first friction material and second friction elements made with a second friction material. The first friction material has a compressibility modulus greater than that of the second friction material by a value greater than or equal to 1 MPa. The first friction elements are in a higher number than the second friction elements. A respective elastic element is interposed between each of the first friction elements and the base plate, whereas a respective rigid spacer is interposed between each of at least part of the second friction elements and the base plate.
A block for wheel brakes comprising a friction portion, in which a friction surface is defined, which, in use, acts upon a peripheral surface of a wheel in order to carry out the braking action, a support plate, which is fixed, in an irreversible manner, to a surface of the friction portion opposite the friction surface, and a base plate, which is fixed to the support plate and comprises a coupling element to fix the block as a whole to a brake system. The block comprises at least one elastic element placed between the support plate and the base plate. The presence of the elastic element creates a ventilation air space between the support plate and the base plate.
A pad for disc brakes for railway vehicles includes a base plate, a plurality of friction elements fixed to the base plate, and a plurality of spacers, each of which is mounted between the base plate and a respective friction element. At least one fixing hole is obtained in each one of the spacers, which is engaged by a respective rivet to lock the friction element to the base plate. Each one of the spacers includes a plurality of metal plaques, each having a fixing hole obtained in the plaque. The metal plaques are stacked on top of one another so that the respective fixing holes coincide.
B60T 1/06 - Arrangements of braking elements, i.e. of those parts where braking effect occurs acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission
B60T 5/00 - Vehicle modifications to facilitate cooling of brakes
B61H 5/00 - Applications or arrangements of brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
F16D 65/097 - Resilient means interposed between pads and supporting members
A block (1) for wheel brakes comprising (i) a friction portion (2), in which a friction surface (5) is defined, which, in use, acts upon a peripheral surface of a wheel in order to carry out the braking action, (ii) a support plate (3), which is fixed, in an irreversible manner, to a surface (6) of the friction portion (2) opposite the friction surface (5), and (iii) a base plate (4), which is fixed to the support plate (3) and comprises a coupling element (4a) to fix the block (1) as a whole to a brake system. The block (1) comprises at least one elastic element (12) placed between the support plate (3) and the base plate (4). The presence of the elastic element (12) creates a ventilation air space (I) between the support plate (3) and the base plate (4).
A disc brake for railway vehicles comprising a pad and a disk on which the pad acts is provided. The pad comprises a base plate and a plurality of friction elements fixed to the base plate. The friction elements comprise first friction elements made of a first material and second friction elements made of a second material. The second material has a compressibility modulus (e.g., the pressure needed to compress the material by 1 mm) that is at least 5 MPa less smaller than the compressibility modulus of the first material. There may be more of the first friction elements than the second friction elements.
A block (1; 11) for wheel brakes comprising a matrix (2; 12) made of a first sintered material and one or more inserts (3; 13) included inside the matrix and made of a second material having a hardness which is greater than the one of the first material. The inserts (3; 13) are arranged in a symmetrical manner relative to a transverse middle plane (X). The second material has a thermal diffusivity which is smaller by at least 1*10-6m2/s than the one of the first material. The block has a friction surface (4; 14) made of said first material for 95 to 60% and of said second material for 5 to 40%.
A block (1; 11) for wheel brakes comprising a matrix (2; 12) made of a first sintered material and having one or more inserts (3; 13) included inside said matrix (2; 12) and made of a second material. The second material has a compressibility modulus (pressure needed to compress the material by 1mm) which is smaller than the one of the first material. The block has a friction surface (4) made of the first material for 95 to 60% and of the second material for 5 to 40%.
A pad for disc brakes for railway vehicles is provided. The pad includes a base plate and friction elements fixed to the plate and arranged in at least two arcuate rows. Each row has friction elements with one same friction surface and a total friction surface ranging from 40% to 80% of the total friction surface of the friction elements of a neighboring external row. Each friction element of at least one neighboring internal row has a friction surface that is less than the friction surface of each friction element of the neighboring external row. The friction elements of each row are arranged on the base plate to act on a surface portion of a brake disc, which partially overlaps surface portions of the disc on which friction elements of a neighboring external row and friction elements of a neighboring internal row act.
A railway vehicle disk brake pad having a base plate; a number of supporting plates fitted to the base plate; and a number of friction members fixed to the supporting plates. The base plate has a number of perforated drawing portions, each of which has a projection on which a respective supporting plate rests directly, thus forming a gap between the base plate and the supporting plate.
A railroad and industrial vehicle disk brake pad having a supporting plate and a number of friction members. Each friction member is elongated in shape, with two curved parallel long sides, and is fixed to the supporting plate so that the curves of the long sides form a substantially 0° angle with respective concentric circles of a disk to which the pad fitted. To prevent displacement of the friction members, these are fixed to the supporting plate with the interposition of antirotation means.
A railroad and industrial vehicle disk brake pad having a supporting plate and a number of friction members. Each friction member is elongated in shape, with two curved parallel long sides, and is fixed to the supporting plate so that the curves of the long sides form a substantially 0.degree. angle with respective concentric circles of a disk to which the pad fitted. To prevent displacement of the friction members, these are fixed to the supporting plate with the interposition of antirotation means.
12 - Land, air and water vehicles; parts of land vehicles
Goods & Services
Sabots de freins pour véhicules automobiles, pastilles pour
freins de véhicules automobiles, mâchoires de freins et
disques de friction pour véhicules automobiles.
