Railway transport vehicle brake block

FIELD: transport.

SUBSTANCE: brake block contains polymer composite friction element with cavity in its central part, metal frame and rigid inserts spaced at different sides of cavity. Rigid inserts are made with insert working part width equal to approximately one half of friction element working part width. Rigid inserts are located at different sides of friction element working part.

EFFECT: improvement of block operational performance due to providing solidity of frictional element with simultaneous keeping block flexibility and positive action of inserts on the whole rolling surface of wheel participating in friction contact.

3 dwg

 

The invention relates to the brake pads railway rolling stock, for example blocks of passenger and freight cars, trains, subways, etc.

Analogous to the claimed invention is a brake pad of a rail vehicle containing composite friction element, a metal frame and a solid insert that is located in the Central part of the pad and pressed into composite friction element (see RF patent №69597, IPC F16D 65/04, 2007). The essential features of the analogue composite friction element, a metal cage" match the essential features of the claimed invention.

The disadvantage of analogue is to reduce the wear pads because of the lack on the working surface of the pad in its Central part (opposite the main boss) special grooves, giving the Board the necessary flexibility, flexibility, in turn, leads to uniform wear, reducing the required braking effort of pressing and improving pererabatyvaemogo pads to the surface of the rolling wheel.

Analogous to the claimed invention is a brake pad of a rail vehicle containing polymer composite friction element with a hollow in the Central part, m is a metallic frame and a rigid insert, posted on deepening (see RF patent №67045, IPC VN 7/02, 2007). The essential features of the analogue composite friction element with a hollow in the Central part, metal frame, solid inserts that are spaced dips coincide with the essential features of the claimed invention.

The disadvantage of analog is the degradation of the performance pads because of the lack of solidity of the friction element broken inserts into three unequal parts, which can lead to partial destruction of the pads under the impact of mechanical and thermal loads in frictional contact during operation.

The closest analogue of the claimed invention is a brake pad of a rail vehicle containing polymer composite friction element with a hollow in the Central part, metal frame and solid inserts, spaced recesses (see RF patent №73840, IPC VN 7/02, 2008). The essential features closest analogue composite friction element with a hollow in the Central part, metal frame, solid inserts that are spaced dips coincide with the essential features of the claimed invention.

The disadvantage is the closest analogue I have is the degradation of the performance pads because of the lack of solidity of the friction element broken inserts into three unequal parts, which can lead to partial destruction of the pads under the impact of mechanical and thermal loads in frictional contact during operation.

The task, which is aimed by the invention is the improvement of the operational characteristics of the pad by providing a monolithic friction element while maintaining the flexibility of the pad and the positive effects of inserts on the entire surface of the rolling wheel, participating in frictional contact.

To achieve the technical result in brake Shoe railway vehicle containing polymer composite friction element, a metal frame and a solid insert, placed on opposite sides of the recess, a rigid insert is made with a width in the working of the inserts (part subject to wear under normal operation, pads), approximately equal to half the width of the working part of the friction element (part subject to wear under normal operation, pads), with working part of the inserts are placed on different sides of the working part of the friction element.

The essential features of the claimed invention, "solid insert is made with a width in the working of the inserts, approximately equal in the barn width of the working part of the friction element while working parts of the inserts are placed on different sides of the working part of the friction element are different from the characteristics most similar analogue.

Figure 1 presents the block, side view. Figure 2 presents the frame pads with mounted on it inserts. Figure 3 presents the block, view from the side of the working surface (surface friction contact).

Brake pad of a rail vehicle includes a metal frame 1, the solid insert 2 and 3 and the friction element 4. The friction element is made of a polymer composite with a matrix of the polymer, which has a variety of dispersed fillers, including fiber. The metal frame can be made of wire and have a master form. Also, the metal frame may include a perforated or reticulated metal strip (perfomance). Solid inserts can be made of metal (for example, various grades of cast iron), metal-ceramic, polymeric and other Inserts have a width b of the working (abrasion during operation pads) part 5, is approximately equal to half of the width L of the working (abrasion during operation of the pad) of part 6 of the friction element and placed on opposite sides of the Central recess 7, and the working parts of the inserts placed on various the x side of the working part of the friction element.

Be made of the inventive pad may known methods, for example by molding. While fixing inserts on the frame can be performed by different techniques (welding, snap and others).

The proposed placement of inserts in the Shoe allows the friction element pads monolithic, thus decreasing the probability of failure of individual parts of the friction element during operation and improve operational performance pads, because the solidity of the friction element is accompanied by flexibility of the pad and provide the overall positive effects of inserts on the entire surface of the rolling wheel, participating in frictional contact.

Brake pad railway vehicle containing polymer composite friction element with a hollow in the Central part, metal frame and solid inserts, spaced on opposite sides of the recess, wherein the rigid insert is made with a width of the working side of the inserts of approximately half of the width of the working part of the friction element, with solid inserts are placed on different sides of the working part of the friction element.



 

Same patents:

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FIELD: railway transport.

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10 cl, 10 dwg

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2 cl, 3 dwg, 4 ex

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EFFECT: higher durability and safety, longer service life, sable braking capacity and wheel surface recovery in braking.

3 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention refers to railway transport, namely to brake blocks of railway vehicles. Brake block contains composite friction element, metal frame made of steel strip and solid insert welded to it, wire frame, central boss with orifice for splint and two side bosses. Metal frame of steel strip is less in width than wire frame, it is radiussed over brake block rear surface and pressed in brake block rear surface from both sides of solid insert between side bosses and central boss. Wire framework is essentially two closed up frames around block periphery pressed into composite friction element in the rear part of brake block. Inner parts of two closed up frames overlap each other are folded outside rear part of brake block forming an eye for a splint. Side bosses are made of composite friction material. Solid insert has slot open from the side of its rear surface is enclosed in wire frame and pressed in central boss so that its rear surface is in same plane with central boss rear surface. Enhancement of strength of brake block construction and tool-life gain are reached, as well as spoilage reduction in their manufacturing.

EFFECT: enhancement of strength of brake block construction and tool-life gain are reached, as well as spoilage reduction in their manufacturing.

2 dwg

FIELD: transport.

SUBSTANCE: invention refers to railway transport, namely to brake blocks of railway vehicles. Brake block contains composite friction element, wire framework, solid insert located in central part of block and pressed into composite friction element. Wire framework is essentially two closed up frames around block periphery pressed into composite friction element in the rear part of brake block. Inner parts of two closed up frames overlap each other are folded outside rear part of brake block forming an eye for a splint. The block contains in its rear part wire-mesh or perforated metal sheet pressed into composite friction element. Insert has slot in its upper idle part pressed by composite friction element with orifice for splint and cantilevers symmetrically located over insert length from each side. Upper idle part of insert is put in wire frame and jammed in it. Enhancement of strength, reliability of brake block construction, tool-life gain are reached.

EFFECT: enhancement of strength, reliability of brake block construction, tool-life gain are reached.

4 cl, 3 dwg

FIELD: transport.

SUBSTANCE: brake block incorporates a carcass with mounting ledges arranged at the block rear edges, a boss with a central bore designed for fastening inside the shoe. The carcass rear is coated with a steel plate. There are chambers filled with friction elements arranged on the working surface side. The said steel plate represents a plate-like section spring with the ledges fitted under the show points of bearing. There is a corrugated fluoroplastic heat-resistant lining arranged between the steel plate and the carcass. The aforesaid spring and lining are furnished with cuts made opposite the carcass mounting ledges and the boss hole. The aforesaid chambers are divided into cells filled with friction elements. The chambers, cells and friction elements represent truncated pyramids or cones with their smaller base turned towards the carcass working surface and with lateral walls inclined at the angle α=10-15° to form a fixed dovetail joint. The carcass side surfaces feature two openings arranged on both sides opposite the chambers.

EFFECT: reliable and efficient braking at high speed, longer brake block life ensured by elastic interaction between brake block and shoe, reduced noise.

9 cl, 6 dwg

FIELD: transport.

SUBSTANCE: flangeless brake block incorporates a steel plate, a cast iron arc-like body furnished with friction elements arranged on the block friction side. The block body rear side has a boss with a hole receiving a wedge-type cotter. A lateral stop comes from the said boss, its surface representing a tapered surface with inclination of the generating line from the boss top towards the stop of β=30° and getting transformed into triangular reinforcements running perpendicular to the block side surface from its rear side. The block arc-like body main part represents a carcass with the chambers that can be divided into cells housing the friction elements. The chambers, or cells and friction inserts corresponding to them represent truncated pyramids or cones with their smaller bases turned towards the block friction surface and their walls inclined at the angle of α=10° to 15° to form a fixed joint of the dovetail type. The steel plate covering the main section rear side represents a plate shaped spring with ledges arranged under the shoe point of bearing and rests on the stop bulges. A corrugated heat-resistant fluoroplastic lining is arranged between the aforesaid spring and the block body.

EFFECT: reliable and efficient braking in high-speed conditions, longer life and lower noise.

8 cl, 8 dwg

FIELD: transport.

SUBSTANCE: invention relates to railroad transport, namely to brake shoes of rolling stock. In compliance with the first version, brake shoe comprises one-layer composite friction material rear surface of which has perforated bent steel band and wire carcass pressed therein. Said wire carcass is made up of two interconnected wires. Every carcass is made by bending wires with their ends connected. Wire ends connections cause no thickening of wire carcass along the shoe thickness. In compliance with the second version, brake shoe comprises one-layer composite friction material rear surface of which wire carcass pressed therein. Said wire carcass is made up of two interconnected wires. Every carcass is made by bending wires with their ends connected. Wire ends connections feature thickening of wire carcass along the shoe thickness. Wire ends connections are located at the center of wire carcass, nearby brake shoe outer side surface.

EFFECT: stable braking, recovery of wheel rolling surface, higher safety.

6 cl, 7 dwg

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