Abstract:
Shaped material (1), in particular a disc for a disc brake includes layers (2, 4, 6) of carbon fibers stacked in a construction direction (X). Each layer (2, 4, 6) has segments (8, 10) placed side by side and joined together to form the layer, the segments of a layer (2, 4, 6) include radial segments (8) and transverse segments (10). In each layer (2, 4, 6) of carbon fibers, the number of transverse segments (10) is greater than the number of radial segments (8). A method manufactures a shaped material.
Abstract:
A rotational element, to be braked, is provided on two opposite sides with braking discs. Each of the braking discs is constituted by an odd number of at least three segments. There are elements rigidly joining the segments together, elements rigidly fixing the segments to the rotational element and elements rigidly joining together the discs arranged on opposite sides of the rotational element. The rotational element includes a hub and a rim, joined by a web. In a preferred embodiment, the web includes a first radial region of greater rigidity located closer to the hub and a second radial region of lesser rigidity located closer to the rim. In these regions there are provided respective series of through apertures. The braking discs are secured to the rotational element in correspondence with the more rigid radial region. The rotational element can be provided as a central portion of a larger structure, or as an actual wheel, such as a railway wheel.
Abstract:
The present specification discloses a wheel comprising a central hub and an outer rim interconnected by a web. A pair of annular braking discs are mounted one on each side of the web, each annular braking disc being secured to the web by at least two attachment elements. Each annular braking disc comprises at least two curved segments, each curved segment having two end edge regions, each end edge region of each segment overlapping an end edge region of an adjacent segment so that a continuous annular braking disc with a smooth braking surface is provided. The overlapping end edge regions have sections which extend generally axially of the braking disc in opposite directions, the sections interengaging with each other, with a spring being located between the overlapping end regions to thus bias the overlapping end regions circumferentially with respect to the annular braking disc, to thus securely interengage the segments.
Abstract:
An internally air cooled brake disc assembly of the invention is manufactured by casting in small pieces to eliminate problems associated with casting large discs with integral air cooling passages. The assembly has a main disc member and a plurality of disc segments secured to the main disc member. The disc segments are separate entities and can expand and contract independently of each other, thus reducing distortion from thermal effects. Assembled outer surfaces of each disc segment are generally flat and provide an annular surface to be swept by brake pads. Inner surface of each disc segment has a plurality of ridges and at least one groove which spaces apart the ridges. The ridges contact the main disc member so that at least one passage is formed between the disc segment and the disc member to receive a flow of cooling air. When the disc segments are secured on each side of the main disc member, the disc assembly has a plurality of cooling passages on each side of the main disc member. An optional external fan means can be provided adjacent inner ends of each disc segment to provide a forced flow of air over the outer surfaces of the disc.
Abstract:
A friction component for a clutch or brake including a facing of friction material and at least one metal section of plate-like form embedded in a rear surface of that facing and having an integral rivet or other fastener projecting outwardly from the facing rear surface. The metal section extends across a relatively small part of the facing rear surface and if there is a plurality of such sections they may be interconnected through integral bands. In the case of an annular friction component the metal sections are spaced circumferentially around the friction facing and if connecting bands are used they are preferably adjacent the inner periphery of the facing.
Abstract:
A brake disc for mounting to a railroad wheel or the like comprises a plurality of segments. Each segment is of part annular configuration and has two mounting tangs at a radially inner edge. Bolts pass through the mounting tangs to affix the segment to the wheel. The wheel is provided with an inwardly directed flange at its rim in order that retention tangs at the radially outer edge of the segment are captured between the flange and the web of the wheel. Under heat generated during braking the segment can expand radially outwardly. The segment is prevented from curling or warping in the axial direction by the flange of the wheel and the retention tangs. Preferably the mounting tangs have a part curved configuration so as to accommodate expansion of the segment by bending of the mounting tangs. The mounting tangs can be fitted with an axially extending lip so as to locate the segments and resist centrifugal forces during rotation.
Abstract:
A segmented annular clutch plate for use in any conventional clutch plate chanism. The segments are of equal arcuate dimension so that they are interchangeable. Each segment possesses the same annular uniformily serrated surface. Each segment may be provided with a key-slot mating connection to restrict the radial movement of the clutch plate while in operation. The clutch plates are designed and oriented so that in the clutch assembly the plates in one set of plates have different numbers of segments than the plates in the other set of plates, whereby adjoining plates can have only two segment joints in axial alignment at any one instant.
Abstract:
A disk brake assemblage providing an improved arrangement whereby the brake pads and supports therefore may be changed with a minimum amount of disassembly of the disk brake assemblage. The brake assemblage is provided with an annular cylinder and an annular piston operable therein and comprising a brake cylinder device operably disposed between a pair of backing plates and brake pads which are adapted to frictionally engage respective brake disks or rotors. Both the cylinder and the piston are provided with axially projecting lugs or members normally engaging correspondingly formed recesses on the brake pad backing plates for retaining the brake pads and plates in the operable position. By axially squeezing or displacing the cylinder and piston toward each other, the lugs are displaced out of the recesses to permit the brake pads and backing plates to be removed and replaced.
Abstract:
A low wear disk brake assembly has a rotatable body and a fixed axle rotatably supporting the body. A stack of disks having splined portions are aligned alternatingly relative to the axle in the body with each disk characterized by being made from graphite and/or carbon materials such that the disks have flexural strength of greater than 5000 psi and an average interlaminar spacing of crystalline and amorphous carbon of not more than 3.39 angstrom units at 15.degree.C.
Abstract:
A disc brake comprising an alternating arrangement of rotors and stators, each including a plurality of sectors. Each sector is provided with sockets with graphite friction shoes fixed therein, at least two portions of at least two shoes, belonging respectively to an adjacent rotor and stator, comprising roughening elements distributed in such portions that when the rotors rotate, the roughening elements rub on the surface of the shoes of the rotor and stator. The roughening elements are arranged as subdivided elements in the form of a succession of adjacent segments in ring array. The ring of roughening elements is accommodated within the same socket as its respective shoe.