Brake pad railway rolling stock
(57) Abstract:Brake Shoe for railway vehicles, comprising a metal frame and mounted thereon a polymeric composite friction element, characterized in that the polymer composite friction element is made of two layers having different conductivity, and a layer in contact with a metal frame made of polymer composite friction material, the conductivity of which is lower than thermal conductivity of polymer composite friction material of the layer situated on the side of the working surface of the pad.
FIELD: railway transport; vehicle brakes.
SUBSTANCE: proposed brake shoe of rail vehicle has off-axial conical working surface and cylindrical rear surface. Distance between axis of rotation of rear surface of shoe and working surface is greater than distance between axis of rotation of working surface and shoe working surface.
EFFECT: improved operating characteristic of shoe owing to reduction of possibility of cracking and breaking of edge parts of shoe in operation.
FIELD: railway transport; vehicle brake shoes.
SUBSTANCE: proposed brake shoe contains friction member and metal skeleton, being essentially perforated metal strip and wire frame combined with strip. Ratio of mass of metal skeleton and mass of shoe is 1:15 - 1:35, and ratio of mass of metal perforated strip and mass of wire frame is 1:1 - 1:6.
EFFECT: increased strength of shoe.
FIELD: railway transport; vehicle brake shoes.
SUBSTANCE: proposed brake shoe contains friction member made by hot mounding method from composition containing polybutadiene rubber, curing group, powder fillers and fiber. Friction member is made with ratio of fiber and power fillers in composition being 1:1 - 1:20.
EFFECT: increased strength of shoe owing to increased strength of friction member by choosing optimum ratio of fiber and powder fillers.
FIELD: railway transport vehicle brake shoes.
SUBSTANCE: proposed brake shoe contains polymeric friction member secured on metal skeleton being essentially perforated metal strip provided with hole for cotter and combined with closed frame. Plane of symmetry of hole for cotter asymptotically approaches plane of symmetry of shoe. Friction member is made by hot molding method from composition in which mass of rubber is 5-30% of mass of composition.
EFFECT: improved performance characteristics of brake shoe owing to higher strength indices.
FIELD: railway transport; brake shoes of rolling stock.
SUBSTANCE: proposed brake shoe contains metal wire frame with backing and with hole for cotter in central projection of shoe, and friction part with hard inserts. Insert made of metal in form of rectangle in longitudinal section with side walls over entire length of shoe and with, at least, two bridges from each side from central projection of shoe. Bridges contain fixing cavities for frame fittings, and composite friction element is arranged inside insert. Invention provides increase of braking efficiency of shoe if water or ice gets into friction zone, improves reliability of design of shoes operating in cold climate and frequent application of brakes.
EFFECT: increased service life of wheels.
3 cl, 5 dwg
FIELD: railway transport; brake shoes of rail vehicles.
SUBSTANCE: proposed brake shoe has metal skeleton-back with hole for cotter in central projection of shoe. Skeleton-back is made in plan in form of rectangle with side walls over entire length of shoe and with at least two bridges. Said bridges connect side walls being arranged symmetrically at both sides relative to central projection of shoe. Bridges are provided with fixing grooves for composite friction member arranged inside skeleton-back.
EFFECT: increased braking efficiency of shoe if water or ice get in friction zone, improved reliability of design of shoe in operation in cold climate and at frequent application of brakes.
3 cl, 1 dwg
FIELD: railway transport; brakes.
SUBSTANCE: proposed brake shoe contains metal skeleton with U-shaped projection in central part and compositive friction member and one hard insert. Hard insert is arranged in central part of shoe, being welded to metal skeleton. Hard insert is made of high strength or malleable cast iron. Ratio of area of working surface of hard insert to total area of shoe working surface if from 4% to 20%.
EFFECT: provision of cleaning and polishing action of hard insert onto wheel without impairment of operation of brake shoes at braking.
FIELD: railway transport; brakes.
SUBSTANCE: proposed brake shoe contains composite friction member, metal skeleton and hard insert. Metal skeleton consists of two parts, namely, main strip with projection in central part, and reinforcement plate welded to main strip. Hard insert is welded to reinforcement plate of metal skeleton in its central part by continuous weld in longitudinal and/or transverse direction.
EFFECT: increased strength and improved reliability of brake shoe.
FIELD: railway transport; brake.
SUBSTANCE: proposed brake shoe contains metal skeleton with projection in central part, composite friction member and hard insert. Shoe is furnished with two flat heat insulating elements arranged at both sides of insert between insert and friction and overlapping zone of their contact inside shoe along width and height of shoe. According to second version, shoe is furnished additionally with open slots at both sides from insert between insert and friction member, and overlapping zone of their contact inside shoe along width and height of shoe.
EFFECT: increased reliability of shoe by changing its design to increase heat resistance by preventing thermal cracks in body of friction member and its burning in place of contact with cast iron insert in manufacture and in service.
3 cl, 2 dwg
SUBSTANCE: invention relates to railway transportation, particularly to train brake blocks. The brake block contains a metal carcass representing a basic band with a П-shape ledge in its central part, two side bosses and a friction ceramic metal element. The said metal carcass is furnished with a reinforcing plate, a copper-plated steel strip equal in length and width to the said friction ceramic metal element rear side and sintered to it at pressure in the furnace. The metal carcass basic band with the said П-shape ledge in its central part is welded from outside to the said reinforcing plate on the block rear in the holes specially made to this end in the metal carcass basic band and on both end faces of the brake block.
EFFECT: higher strength and reliability of ceramic metal brake block, easier manufacturability.
FIELD: mechanical engineering; friction units containing reinforcing metal framework, for example blocks for automobile disk brakes; friction units for various machines and mechanisms.
SUBSTANCE: proposed friction unit has metal framework with holes and friction member molded to it and provided with projections corresponding to holes in framework; projections are received by these holes. Novelty of invention consists in height of projections which is lesser than depth of holes; surface which is not brought in contact with framework inside holes has recesses in at least one of projections. Proposed friction unit enhances resistance of joint of framework with friction member to shear loads.
EFFECT: enhanced resistance to shear loads; reduced mass; low requirements for strength of composite material; facilitated procedure of manufacture.
FIELD: transport engineering; brake systems of wheeled vehicles.
SUBSTANCE: proposed wheeled vehicle contains brake mechanisms, brake mechanism liquid cooling device, stop signaling electric system and windshield washer including reservoir with liquid, pump and pump drive motor electrically coupled with supply source through switch. Washer is furnished with two-position electromagnetic valve whose input is connected with pump, and normally open output, with washer, and normally closed output, with brake mechanism cooling device through normally-closed electromagnetic valve. Electromagnet of two-position valve is connected to stop signaling circuit, electromagnet of normally-closed valve, to threshold device electrically coupled with supply source and brake mechanism temperature sensor, and switch is furnished with electromagnetic switching drive connected to stop signaling circuit. Friction pads are secured on brake disks, and brake shoes are made hollow, with partitions inside. Input of brake shoe space is hydraulically connected with pump of brake mechanism cooling device, and output, with reservoir with liquid.
EFFECT: improved efficiency of braking and traffic safety.
FIELD: automotive industry.
SUBSTANCE: braking block comprises metallic frame and friction lining secured to the frame with a glue. The mass of the glue layer relates to the mass of the friction lining as 1:100-1:150.
EFFECT: enhanced reliability.
FIELD: machine building.
SUBSTANCE: invention relates to machine building, namely, to friction bake shoe linings of disk brakes. Proposed device comprises moulding material attached to load bearing plate with opposite surfaces, one or several out-of-round extrusion orifices arranged over the plate depth, and ledges or any other fixed mounting ledge. Aforesaid moulding material is arranged above aforesaid opposite surfaces after extruding through aforesaid extrusion orifices to produce a homogeneous structure. In this structure moulding material on one side of load bearing plate acts as friction material of the lining, and, on the other side, it acts as a noise-reducing element. The number, shape and arrangement of extrusion orifices may vary to vary noise-reducing properties of the block, thus, reducing risks of brake system components locking.
EFFECT: improved noise-reducing properties.
49 cl, 8 dwg
FIELD: railway transport.
SUBSTANCE: invention relates to the railway transport, in particular to brake blocks of the railway transport brakes. Brake block without metal support plate has metal insert containing the main body, two wing-shaped feathers integrated into the main body, located on its opposing sides, digressed wherefrom and having backside surfaces adjacent to the backside surface of the brake block. It also has two mostly parallel feathers spreading in radial direction and integrated into the main body and/or to the wing-shaped feathers. Parallel feathers form the keyway. When the brake block is installed at the brake head the keyway passes through the hole located in the brake head.
EFFECT: invention increases the technical characteristics of the block.
8 cl, 19 dwg