Railroad vehicle braking clamp

FIELD: transport.

SUBSTANCE: invention relates to braking devices, namely to railroad vehicle braking clamps. Proposed braking clamp comprises at least one single-layer composite friction element, wire carcass pressed into clamp rear part and at least one solid insert furnished with braces arranged on each side over its length. At least one brace is made independent of said insert, jointed therewith and fitted on the clamp rear surface side. Said solid insert is jammed in said wire carcass. Solid insert can be made from high-strength or malleable iron.

EFFECT: longer life, higher safety.

2 cl, 2 dwg

 

The invention relates to brake devices, namely to the brake pads for rail vehicles.

The prior art composite brake pad for rail vehicles.

The RF patent for the invention №2309072 known brake pad of a rail vehicle, comprising a metal frame with U-shaped ledge in the Central part of the composite friction element and one solid box, located in the Central part of the pad and welded to the metal frame, and a solid insert is made of ductile or malleable iron, and the ratio of the area of the working surface of a solid insert to the total area of the working surface of the pad is from 4 to 20%.

Composite coleosperma brake pads with an insert made from special high-strength cast iron allow you to increase the life of the wheel, as used type of cast iron has a ferritic structure and graphite in the form of spherical or flaky inclusions, high mechanical properties, including tensile strength and elongation, resulting in the braking process at high temperatures, the iron melts, spread on the surface of the wheel and fills microcracks on the surface of the wheel, thus preventing further RA is the development of these cracks; improves the running surface of the wheel and increase the resistance of the wheels to the formation of fishermen and other defects. In addition, insertion of special cast iron due to its inherent abrasiveness has at normal and low temperatures cleansing effect on the wheel, increases the roughness of the running surface of the wheel and increases the traction wheels with the rail and stability, braking performance, especially in autumn and spring.

However, this design pads with strong vibrations and frost occurs a separation of the friction element from the metal frame, and sometimes the destruction of a metal frame in place of the U-shaped ledge.

Known technical solution is used for the same purpose and has in common with the claimed nuts essential features: "metal frame", "composite friction element" and "solid insert of ductile or malleable cast iron".

Known brake pad railway vehicle by RF patent for useful model №69597 containing composite friction element, the wire frame representing shrunk in the composite friction element back side pads on the perimeter pads, two closed frames, the inner part which are mutually overlapped and bent outward Tylin the second part of the pads, forming an eyelet for passing checks, solid box, located in the Central part of the pad and pressed into composite friction element. Pad from the back side contains a metal mesh or perforated sheet metal, plated in composite friction element, the insert in the upper outside part has a groove on its rear side, pressed friction composite material with a hole for the passage of checks and console symmetrically located along the length of the insert on each side, with the upper outside portion of the insert is inserted into the wire frame and clamped in it.

In the known construction pads the length of the insert in place consoles greater than the length of the Central boss, but less than the distance between the side bosses.

This pads outside of the insert has a recess on the side across the width of the insert, and on the other side of the ledge, caught in a wire frame with two sides of length on both sides for width and height so that the back surface of the insert in the Central boss is in the same plane with the bottom surface of the mesh or perforated sheet.

We consider console pads are an integral part of the insert, as molded together with insert and are in the body of composition per item under arrowanas tin, shrunk in the composite element.

Therefore, a well-known Shoe has a durable and reliable design, but its heat dissipation to the environment is insufficient, which does not allow for maximum heat removal from the zone of contact pads with the wheel, and, as a consequence, reduces the service life of the wheels and pads.

Known technical solution is used for the same purpose and has in common with the claimed nuts essential features: "metal frame", "composite friction element" and "solid insert with consoles".

Known brake Shoe composition for railway rolling stock with spaced inserts (options) by the RF patent for useful model №67045.

In this block, containing one or two-layer composite friction element mounted on mesh-wire skeleton, there are cast-iron, or steel inserts, spaced from the axis of the pad. As can be seen from the drawings figures 1, 2, are given in the description of this patent, the Shoe contains two cast-iron, or steel inserts, coated on the back side of the pad with a thin layer of composite material and a perforated celnikom.

The disadvantages of this block are the following. The design of this pad has a small heat loss to the environment, as well as insufficient strength, that is in the process of operation reviewed pads are formed through cracks from the working to the back surface of the pad on the border between the insert and the composite friction element, due to their different thermal conductivity. As soon as the rift between the composite friction element and the solid insert comes from the working to the back surface of the pad and becomes the end-to-end, solid insert hangs on a wire frame and the block is destroyed.

Connection of steel, and especially cast iron inserts, with steel wire frame by welding, soldering or combined with a wire frame casting costly and time-consuming operation, and the bonding type lock is not enough clear, as it is not explained either in the description or in the drawings.

According to the description of the utility model insert this block is made of steel and cast iron such brands that do not recover the rolling surface of the wheel during normal braking by filling the microcracks on the surface of the wheel, for example, molten steel and molten cast iron, and thereby prevent their further development and does not allow to increase the life of the wheel.

The essential features of similar "two solid insert", "one or two-layer composite friction element" and "wire frame" are shared with the essential features of the claimed pads.

The closest analogue is known brake pad railway vehicle according to the patent of the Russian Federation on portnoymetal No. 69177, containing composite friction element, a metal frame with steel bars and welded thereto an insert located in the Central part of the pad, the wire frame representing shrunk in the composite friction element back side pads on the perimeter pads, two closed frames, the inner part which are mutually overlapped and bent out the rear of the pads, forming an eyelet for passing checks, Central boss with a hole for the pin and two side lugs, made of composite friction material, and the metal frame of the steel strip is made of a width less than the width of the wire frame, curved on the radius of the back surface of the pad and pressed in the back surface of the pads on both sides of a rigid insert between the side bosses and the Central boss, and a solid insert provided with a groove, the open side of its back surface, is inserted into the wire frame and is pressed into the Central boss so that its back surface is in the same plane with the rear surface of the Central boss.

Steel frame in the closest analogue is made of two steel strips welded to the insert on each side along its length, which consoles are inserted.

This design of the pads with the solid insert, for example from high-strength cast iron, can increase the heat transfer from the cast iron insert and wheels in the environment due welded to consoles (steel strip)facing the back surface of the pad, and provides stability in braking performance and high resource pads and wheels.

However, the design of this pad not perfect, because the wire frame is not connected with a solid insert welded to consoles, in connection with which the briquetting and vulcanization pads under pressure is a slight move and rotate them relative to each other, in addition, due to the lack of connection wire frame with solid insert welded to consoles structural strength pads at the end of operation, pads insufficient, and therefore has increased the minimum allowable thickness of pads that are permitted for use.

The following essential characteristics most similar analogue are shared with the essential features of the claimed pads: "composite friction element", "wire frame", "solid insert with the United with her consoles (with the connected metal frame)".

The challenge which seeks inventive brake pad, is increasing the strength of the con is e.g. pads by connecting, at least one solid insert with wire skeleton, and also maintain high heat transfer pads in the environment, including through consoles, in the form of metal plates that go on the back surface of the Shoe and connected with a solid insert, made of ductile or malleable iron.

Technical result achieved during operation of the inventive pads, is to increase resource blocks and resource wheel and reducing the cost of their replacement.

The task decides brake pad railway vehicle containing:

- at least one-layer composite friction element;

- the wire frame, plated in the back of the pads;

- at least one solid insert, fitted on each side along its length consoles, of which at least one is made separately and connected with a solid insert and comes on the back surface of the Shoe.

Each of the inserts has a console along the length of the insert from both sides and a groove along the length of the insert in the upper outside part of it, pressed composite material in order to reduce the possibility of formation of the vertical cracks in the ground contact of the composite element with insert.

Part of the consoles, in addition to molded with the insert and the show is already an integral part thereof or all console solid inserts can be manufactured separately and connected to the insert, for example in the form of welded thereto, metal, mainly steel plates that go on the back surface of the Shoe with the goal of significantly increasing the heat transfer to the environment.

In this case, at least one solid insert is connected with a wire frame, for example trapped in it.

Flexible pinched the back outside part of the solid insert in the holes of the wire frame is provided by nparalleled and aperpendicular his sides while taking inserted into the holes of the wire frame parts insert a special form, with experimentally selected size, and also performing outside part of the insert special grooves, ridges, slopes, consoles and other forms of providing locking and engagement of the insert with a wire frame.

Flexible pinched hard insert in the wire frame and securing it with consoles and mesh wire frame in the elastic composite friction element, such as a rubber binder, determine the ability of the pads during operation to upregulations deformation, to the extent possible for the composite friction element.

Therefore, this design is tormoznoy pads has a high shock and vibration resistance, what causes high durability pads.

Solid inserts can be made of ductile or malleable iron, which will ensure stable braking performance in all weather conditions and restore wheelset during normal braking.

Following the essential features of the claimed pads are distinctive from the essential features of the closest analogue: "solid insert is connected with a wire frame", "solid insert is clamped in the wire frame", "solid insert is made of ductile or malleable cast iron".

Figure 1 shows the brake pad of a rail vehicle (one of the possible options, type A-A), where:

1 - composite friction element consisting of one or two longitudinal layers;

2 - the console is made of a steel plate;

3 - solid paste;

4 - wire frame;

5 - Central boss with a hole under check;

6 is a side lugs;

7 - slope on the side of the rear outside portion of the insert;

8 - groove in the back outside part of the insert;

9 is a notch in the side rear outside portion of the insert.

Figure 2 is a schematic diagram of an Assembly of a rigid insert welded to the consoles of the steel strip with a wire frame brake pads as tedorigawa vehicle.

The technology of manufacture of brake pads includes the following steps:

- production (casting) insertion of iron;

- production consoles of the steel strip by way of stamping;

- solid welding the insert to the steel consoles;

- fabrication and welding wire frame wire;

- build a solid insert welded to steel consoles with a wire frame;

- manufacturing composite friction materials for working and non-working layers;

- alternate laying in the mold wire frame, solid insert welded to consoles, hanging outside layer with leveling and working layer with leveling composite friction materials and followed by molding under pressure in the press;

- vulcanization pads in the mold under pressure and at a temperature of;

- drilling holes for the pin in the brake Shoe;

- marking pads, such as inkjet printer, from the outer side surface of the pads outside part of the pad with drawing line wear indicator (lines maximum possible wear pads in thickness).

Detailed description all operations described in sufficient detail in the book Basilaia "Production of brake pads made of composite materials to train the cars". M, Chemistry, 1982, p.8-13, 70, and also in the above analogues claimed pads and other. Solid insert manually inserted and clamped on two sides in the transverse direction in the hole of the wire frame is formed between the convex ends of the two closed frames and with the two sides in the longitudinal direction in the hole in the inner frame wire frame in its Central part and with one hand in a vertical plane, in the recess of the side. On the opposite side of the wire frame in its Central part only fits the bottom side on the ledge. Solid insert tamamlama so that the back surface of the insert is in the same plane with the rear surface of the Central boss.

To do this insert from the side of its vertical surface has a recess in which one of the parties to the framework of the wire frame, and with curved sides of the insert from the back surface to the ledge formed by the difference of its width outside and working sections, has a concave inside surface or slope. The length of the insert on the back of its surface equal to the length of the holes in the wire frame is formed between the convex ends of the two closed frames, and the width of the insert in place consoles equal to the width of the holes in the inner frame Provo is full frame in its Central part. The thickness of the insert is equal to the thickness of the pads or 1-3 mm less to ensure the safety of molds for vulcanization of the brake pads.

The height of the recess and the thickness of the jumpers from the top of the recess to the back side of the insert were selected based on the need of placing and fixing it two convex part of the wire frame in the vertical plane.

As mentioned above, part of the consoles, except molded with the insert and which is an integral part of the insert, or all console insert may be manufactured separately from the insert, for example, from a strip or sheet of steel by stamping and is connected to the insert by way of welding or other means, such as soldering and the like.

The Assembly of the insert with the United with it, consoles are made with a wire frame, as shown in figure 2.

The insert with the United with her consoles, manually, at an angle of 30° to the horizontal start with the side with the notch in the horizontal plane wire frame, cross his hole formed between the convex ends of the two closed frames and in its longitudinal hole in the inner frame wire frame in its Central part, with simultaneous installation in the hollow wire frame in its Central part. Subsequent is the rotation of the insert with consoles to 0° to the horizontal with the simultaneous pressing of the insert wire frame in the recess by hand with little effort is the final installation of the insert in frame with the simultaneous jamming her frame with two sides along the length on both sides in width and from one side of the insert height in the recess of the insert.

In addition to direct crushing of the wire inserts in the frame due to nparalleled and aperpendicular its sides, if necessary, may be made and additional crimping inserts by performing the locking bend in the wire frame using a pneumatic press and tooling, vises, and other means.

The connection wire frame with rigid inserts, which is already attached in turn console, for example welded, can be carried out in ways other than crushing or together with jamming, for example, the method is combined with a wire frame casting, welding, soldering or bonding wire, synthetic cord, braid, etc.

Solid inserts can be made of ductile or malleable iron.

The implementation of the inventive brake pads new design with features indicated in the characterizing part of the formula, can improve the stability, braking performance, structural strength pads and extend the life of brake pads and wheels in operation.

The rugged, reliable design of composite brake pads with solid inserts of special ductile or malleable cast iron, in turn, is Oswalt to achieve stable braking performance, including icing and rain, to improve the heat dissipation in the environment, to provide cleaning, polishing and restorative effects on the rolling surface of the wheel, to fill tiny cracks on the tread surface of the wheel cast iron at its melting at high temperatures and thereby prevent their further development and, consequently, to increase the service life of wheels and resource pads and reduce the cost of the Railways to replace them.

1. Brake pad railway vehicle containing at least a single layer of composite friction element, the wire frame shrunk in the back of the pads, and at least one solid insert, fitted on each side along its length consoles, and at least one console manufactured separately from the insert, connected with it and pressed from the back surface of the pad, wherein the rigid insert is clamped in the wire frame.

2. Brake pad according to claim 1, characterized in that the solid insert is made of ductile or malleable cast iron.



 

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FIELD: machine building.

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20 cl, 15 dwg

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3 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.

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6 cl, 7 dwg

FIELD: railway transport.

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8 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to railway transport, particularly to railway vehicle block brakes. Block brake comprises at least one-layer composite friction element, wire carcass and two solid inserts. Aforesaid wire carcass is pressed in the composite friction material on the block brake rear side. Solid inserts are jointed with the wire carcass. Each of two solid inserts has at least one ledge on the brake rear part, on every side along the insert length. One of the said ledges is arranged in central boss, on both sides from the block center.

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4 cl, 4 dwg

FIELD: railway transport industry.

SUBSTANCE: invention refers to railway transport industry, namely to braking mechanisms used at rolling railway equipment. Brake shoe includes steel plate, cast-iron arc-shaped body consisting of main and profile areas with made groove. The body is equipped with friction elements performed in a form of cylindrical inserts. From the back in the middle of the brake shoe body main area there is transverse lug with hole for V-shaped retaining key. At the back the main area of shoe arc-shaped body is equipped with mounting T-shaped lips at the edges for coupling with stop block and stiffeners in a form of triangular lugs. The depth of profile area lug exceeds the height of wheel tread flange by 0.85 of brake shoe main area thickness. Steel plate covers brake shoe back side, encloses transverse cast-iron lug and has holes in side surface at the level of lug holes for U-shaped retaining key. In the steel plate there are mounting holes for inserts fixing. Five metallic inserts are installed from the side of wearing surface perpendicular to groove outer side wall of profile area.

EFFECT: provision of brake shoe operation safety and effectiveness, elimination of thermodynamic cross cracks possible formation, increase of rolling equipment wheel life and provision of better heat extraction and cooling of brake shoe main and profile area working part.

10 cl, 10 dwg

FIELD: engineering industry.

SUBSTANCE: invention refers to engineering industry, and namely to manufacturing methods of friction items with firm inserts, which are meant for various transport types. Method is realised by hot moulding of shoe from polymer compound in a moulding tool under pressure at simultaneous alignment thereof with metal frame and firm inserts. Hot moulding is carried out in moulding tool with grooves located in a punch that forms the shoe working surface in firm insert location areas. Process projections are formed from polymer friction material on shoe working surface in those zones; then, shoe working surface is machined and process projections are removed, thus providing arrangement of working surfaces of firm inserts and polymer friction material in one plane. Moulding tool used for shoe manufacturing consists of a matrix and upper and lower punches. Punch forming the shoe working surface is equipped with grooves meant for each of the inserts arranged in location areas of firm insert working surfaces. Each groove is bigger than the appropriate insert.

EFFECT: providing the possibility of manufacturing railroad transport means brake shoe and locating working surfaces of firm inserts and working surface of friction material of shoe friction element in one and the same plane, providing efficient operation from the very beginning of brake shoe operation, and minimising the number of expensive friction material waste appearing during machining of shoe working surface.

2 cl, 3 dwg, 4 ex

FIELD: transport.

SUBSTANCE: braking block comprises metal carcass, composite material friction element and two solid inserts arranged symmetrically relative to the block horizontal axis and overlapping its friction part over the width. The said metal carcass represents a wire carcass representing two closed frames press-fitted into the block rear part friction material and perforated tin press-fitted into the block rear part composite friction material. Inner parts of the said frames are partially interoverlapped and bent outwards from the block rear part to form an ear designed to pass the cotter. Rear nonoperating part of every cotter has consoles arranged on each side of the aforesaid inserts all along their length. One of the said consoles is bent towards the block rear surface and arranged in the central boss, the other one being located between the central and auxiliary bosses. Each of the inserts is fitted into one of the wire carcass frames and jammed therein. The inserts, along with the carcass, are pressed in the composite friction material so that the insert console rear surfaces are located in one plate with the perforated tin of the block rear side.

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

3 cl, 3 dwg

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

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