Railway vehicle brake shoe

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.

1 dwg

 

The invention relates to railway transport, in particular to composite brake blocks brake of a rail vehicle.

Known brake pad railway vehicle containing a friction element made of composite material and steel frame (Baserev, the Production of brake pads made of composite materials for railway carriages, M.: Chemistry, 1982, p.12). The friction element is pressed on a steel frame. When mounting pads in the brake node it is attached to the brake Shoe with a special metal bracket-cotter, therefore, the frame is equipped with a special hole for the pin.

The essential features well-known pad friction element made of composite material and metal frame with hole for pin" are shared with the essential features of the claimed invention.

A disadvantage of the known pads are the low strength properties of the pad.

The closest analogue of the claimed invention is a Shoe with a mesh wire frame (Baserev, the Production of brake pads made of composite materials for railway carriages, M.: Chemistry, 1982, p.12-12). The block contains a friction element made of composite material and metal frame. Karka who has a special eye to skip checks for attaching the pads to the brake hub. The frame is made from two elements, a perforated metal strip and combined it with a wire armature. Wire armature consists of two closed frames, the inner part which are mutually overlapped and bent out the rear of the pads, forming an eyelet for passing the checks.

The essential features well-known pad friction element", "metal frame in the form of a perforated tape, provided with a hole for the pin, combined with the wire frame and the eye to skip checks" are shared with the essential features of the claimed invention.

The disadvantage is the closest analogue is not high enough strength indicators pads.

The task, which is aimed by the invention is improved performance pads by increasing its strength characteristics.

To solve the tasks brake pad of a rail vehicle includes a polymeric friction element mounted on a metal frame in the form of a perforated tape, provided with a hole for the pin and combined with a wire frame. The plane of symmetry of the hole the pin asymptotically approaches the plane of symmetry of the pad. The friction element pads are made by thermoforming from compo is icii, in which the mass of rubber is 5-30% by weight of the entire composition.

The essential features of the claimed pads "plane of symmetry of the hole the pin asymptotically approaches the plane of symmetry of the pad and the friction element is made by thermoforming from the composition in which the weight of the rubber is 5-30% by weight of the entire composition are distinctive from the essential features of the closest analogue.

The friction element is made by thermoforming from a composition containing a polymer binder is a rubber and powders and fibrous fillers, giving friction element to a desired set of performance characteristics.

The drawing shows a brake pad of a rail vehicle, where 1 - metal perforated tape, 2 - closed frame, 3 - friction element, 4 - hole pin and 5 - the plane of symmetry of the block.

Execution pads with these distinguishing features will help to improve the strength characteristics of the pad, and consequently, to improve its performance.

Brake pad railway vehicle containing polymer friction element mounted on a metal frame, which is a perforated metal strip, provided with a hole is m under alert and combined with a closed frame, characterized in that the plane of symmetry of the hole the pin asymptotically approaches the plane of symmetry of the pad and the friction element is made by thermoforming from the composition in which the weight of the rubber is 5-30% by weight of the entire composition.



 

Same patents:

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.

2 dwg

FIELD: railway transport.

SUBSTANCE: braking block has a polymeric friction member secured to the metallic frame made of a perforated member which is in coincidence with the wire frame. The length of the perforated member is larger than that of the wire frame and asymptotically tends to the length of the shoe.

EFFECT: enhanced strength.

1 dwg

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Cast iron brake pad // 2040361

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.

1 dwg

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.

1 dwg

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.

2 dwg

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The invention relates to the brake pads railway rolling stock

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.

2 dwg

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.

1 dwg

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.

1 dwg

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.

1 dwg

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.

1 dwg

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