Disc brake block

FIELD: machine building.

SUBSTANCE: invention is related to the field of railway transport, namely to disc brake mechanisms used in railway rolling stock. Brake block consists of frame and friction element that is monolithically connected to it. There are mounting lugs installed on back side of frame. Friction element consists of 1-4 inserts. Inserts are arranged as integral or composite. Integral inserts are installed in frame chambers and are arranged in the form of truncated pyramids with base in the form of trapezoid or polygon that are inverted with their lower base to working surface of brake block, with inclination of side walls of α=10°-15°, with provision of "dovetail" joint to frame chambers. Composite inserts are made of parts, parts are installed in cells of frame chambers and are arranged in the form of truncated pyramids or cones inverted with their smaller base to working surface of brake block with inclination of side walls of α=10°-15°, with provision of "dovetail" joint to cells of frame chambers. Frame material additionally covers internal side walls of integral inserts or internal side walls of composite insert parts. There are windows provided in external side walls of frame, at least on two sides opposite to every insert, and inserts have protrusions that correspond to windows. There are heat resistant elastic damper bushings placed in mounting lugs.

EFFECT: increased heat resistance of block, operational durability, reliability and mechanical strength.

9 cl, 8 dwg

 

The invention relates to railway transport and relates to brake equipment, in particular disc brakes, used mainly on the movable rail structure.

Known metal-ceramic friction pad for a disc brake of a rail vehicle containing five frictional sectors with rounded corners, rigidly connected with the metal substrate with rivets. RF patent №2159368, M CL 7 F16D 69/00, F16D 69/04, VN 5/00, publ. 20.11.2000,

The disadvantage of this block is the lack of mechanical strength of the mounting of the friction sectors, the occurrence of excessive vibration when braking.

The closest is the construction of pads brake pads for disc brakes. The plate consists of a carrier plate and secured to it a block of compacted friction material, which is mounted on the carrier plate with the power and/or flush. The material of the carrier plate is embedded in the free carrier plate surface of the block of friction material, overlaps the side walls located on the carrier plate block of friction material and welded to the material of the block of friction material. RF patent №2229044, IPC 7 F16D 69/00, publ. 20.05.2004,

The disadvantage of this design is the construction is not strong enough anchoring molded friction material. Although the material of the carrier plate, covering the block of friction material, and comes on the working surface of the brake pads, these areas when braking quickly abraded, which reduces the efficiency of the fastening. In addition, the block of friction material has a straight side wall, which is also not conducive to the retention block of friction material on the carrier plate during operation.

The objective of the invention is the creation of a solid disc brake pads with reliable fastening of the friction inserts at the expense of the monolithic body pads and friction inserts, as well as the geometry of the attachment of the lateral walls, with good heat dissipation, reducing vibration and noise during operation.

The problem is solved by the design of disc brake pads, consisting of a frame and integrally connected to the friction element so that the material of the frame covers the outer side walls and adjacent to it the surface of the friction element. On the back of the frame are mounting lugs.

Friction element consists of 1-4 inserts. Inserts can be integral or composite. Solid inserts are placed in the camera frame and is made in the form of truncated pyramids with a base in the form of a trapezoid or polygon deployed a smaller base to the work surface of the brake pads, with a slope Bo the new walls of α=10°-15°, with the formation of compounds with cameras frame type dovetail. Composite inserts are made of parts. Part of the inserts placed in the cells of the camera frame and is made in the form of truncated pyramids or cones deployed a smaller base to the work surface of the brake pads with the slope of the side walls of α=10°-15°, with formation of compounds with a cell camera frame type dovetail. Frame material additionally comprises an inner side wall of solid inserts or inner side walls of the parts of a composite inserts. In the outer side walls of the frame is made open, at least one of two opposite sides of each insert, and the insert have the appropriate Windows ledges. In the mounting lugs placed heat-resistant elastic damping sleeve.

To obtain a disc brake pads one-piece or composite inserts friction element pour molten iron, steel or alloy with hardness not more than 255 HB.

One-piece or composite insert the friction element is made from materials selected from the range: minerals-carbides, silicides, metals and their alloys; polymers with fillers, carbon fibre, PTFE, thermoplastic; cermets.

One-piece or composite inserts friction element is prepared by casting or pressing followed by sintering.

Frame decks and perform castings or teams welded with cameras for whole inserts or with cameras divided into cells for the composite inserts, camera or cell fill composite filler which presoviet and is sintered with the formation of solid inserts or parts of a composite inserts, integrally United with the frame.

Frame pads perform castings or teams welded with cameras for whole inserts or cameras, is divided into cells for the composite inserts, camera or cell fill composite filler hardened by chemical reaction, with the formation of solid inserts or parts of a composite inserts, integrally United with the frame.

The Foundation of the parts of a composite inserts made in the shape of a truncated cone and can be of geometric type, chosen from a number of: a circle, an ellipse.

The Foundation of the parts of a composite inserts made in the form of a truncated pyramid and can be of geometric type, selected from a series: triangle, quadrilateral, Pentagon, hexagon.

The area of the friction element is not less than 92% of the area of the working surface of the pad.

The novelty of the invention lies in the design features pads:

- Friction element consists of 1-4 inserts. Inserts can be integral or composite. Solid inserts are placed in the camera frame and is made in the form of truncated pyramids with a base in the form of a trapezoid or polygon, expand wtih a smaller base to the work surface of the brake pads, with the slope of the side walls of α=10°-15°, with formation of compounds with cameras frame type dovetail. This allows you to create a reliable fastening system. The shape of a truncated pyramid or cone does not allow solid inserts when the abrasion to fall out of the body of the pad. Friction solid paste evenly and maximum overlap width of the friction surface of the working area of the pad, and when you wear them rubbing the surface increases, which reduces wear pads, uniform abrasion and durable fastening of inserts increases the life of the pad.

- Composite inserts are made of parts placed in the cells of the cameras frame. Part inserts made in the form of truncated pyramids or cones deployed a smaller base to the work surface of the brake pads with the slope of the side walls of α=10°-15°, with formation of compounds with frame type dovetail. Frame material additionally comprises an inner side wall parts of a composite inserts. This provides a monolithic connection of the parts of a composite inserts with frame and improves heat, as the material of the frame is distributed between advanced parts of the composite inserts, which greatly increases the surface area from which heat is removed.

In the outer side walls of the frame is made of the window, n is less than one with two sides opposite each insert, and insert have the appropriate Windows ledges. Through these Windows you can visually check the wear inserts, and through them there is additional cooling.

- In mounting lugs placed heat-resistant elastic damping sleeve. Bushings absorb vibration arising from the interaction of the pads from the brake disc rolling stock. Damping of vibration prevents the destruction of friction material for braking and provides a smooth touch and the waste pads, which reduces the noise.

- One-piece or composite inserts friction element pour molten iron, steel or alloy with hardness not more than 255 HB. In addition, the material of the frame as if welded to the material of the inserts and thus obtained solid connection that increases the strength of the structure as a whole.

- One-piece or composite insert the friction element is made from materials selected from the range: minerals-carbides, silicides, metals and their alloys; polymers with fillers, carbon fibre, PTFE, thermoplastic, cermets. Depending on the selected material vary such parameters of the friction material as the friction coefficient and its stability, intensity, wear, hardness, etc. So we offer a wide range of materials, which are selected in zavisimost and from the specified parameters shoes.

- One-piece or composite inserts friction element is prepared by casting or pressing. Depending on the material selected for whole inserts or parts of a composite inserts, can be used one or the other technology of making shoes.

The frame pads perform castings or teams welded with cameras for whole inserts or with cameras, divided into compartments for the composite inserts. Camera or cell fill composite filler which presoviet and is sintered to form inserts or portions integrally connected to the frame. The technology of manufacture of the frame casting provides a solid connection pads. Depending on the technological capabilities of the factory production of the frame can be cumulative welded, in this case, achieving the required strength of the structure as a whole due to sintering.

The frame pads perform castings or teams welded with cameras for whole inserts or cameras, is divided into cells for the composite inserts. Camera or cell chambers filled composite filler hardened by chemical reaction, with the formation of solid inserts or parts of a composite inserts, integrally connected to the frame. This technology provides due to the chemical interaction between a reliable connection material compositng the filler material of the frame.

Base parts of a composite inserts made in the shape of a truncated cone and can be of geometric type, chosen from a number of: a circle, an ellipse. The Foundation of the parts of a composite inserts perform in the form of a truncated pyramid, and they may have a geometric form, selected from the series: triangle; rectangle with straight, sharp or rounded corners; the Pentagon; hexagon. This form allows maximum overlap width of the friction surface of the main body of the pad, which ensures minimum wear pads.

- The area of the friction element is not less than 92% of the area of the working surface of the pad.

We stated the essential features of the invention in the available literature is not found. The invention satisfies the criterion of "novelty".

The essential features of the invention allows to obtain a brake pad with resistant qualities for high-speed transport with increased service life and reliability, mechanical strength, due to fundamental changes in the design of the pad and increase the strength of attachment of the inserts or parts thereof by using mounting type dovetail. Installation of heat-resistant elastic damping bushing provides a smooth soft brake pads at t is rosenii and interaction with the adjacent surface of the wheel, this excludes vibration, sudden engagement of the friction surfaces, causing cracking, chipping and fracture. Smooth touch also reduces the noise in the brakes.

The possibility of producing using different manufacturing techniques and materials can improve their quality and to vary the resulting technical indicators pads depending on the requirements of specific operating conditions on some rolling stock.

The invention is illustrated by drawings, figure 1-8.

1 shows a block with a partial section along the longitudinal axis.

Figure 2 shows the block with a cross-section through the eyelet fastening.

Figure 3 - frame pads with cameras and a friction element of solid inserts, as well as Windows on the side, view from the side of the working surface of the pad.

Figure 4 - frame pads with Windows on the side surface and the mounting lugs on the back of the pad.

Figure 5 - frame pads with the chambers separated by partitions into cells, and a friction element of a composite inserts, consisting of parts, view from the side of the working surface of the pad.

Figure 6 - base in the form of a trapezoid for whole inserts friction element in the form of truncated pyramids.

Figure 7 - base in view of the circle and ellipse for parts of a composite inserts in the form of truncated cones.

On Fig - base in the form of various geometric shapes for the parts of a composite inserts in the form of truncated pyramids.

Disc brake pad consists of a frame 1 and integrally connected to the friction element. Frame material covers the outer side walls and adjacent to it the surface of the friction element. On the back of the frame 1 are mounting lugs 2. Friction element consists of 1-4 inserts. Inserts can be a solid 3 or compound. Solid inserts 3 are placed in the cells 4 of the frame 1 and is made in the form of truncated pyramids with a base in the form of a trapezoid or polygon with sharp or rounded corners (Fig.6 a, b, C), deployed a smaller base to the work surface of the brake pads, with the slope of the side walls of α=10°-15°, with formation of a stationary mounting type dovetail with the chambers 4 of the frame 1. Composite inserts are made of 5 parts (Figure 5). Part 5 is placed in cells 6, formed by the partitions 7, the camera 4 of the frame 1 and is made in the form of truncated pyramids or cones deployed a smaller base to the work surface of the brake pads with the slope of the side walls of α=10°-15°, with formation of compounds of type "dovetail" with cells 6 cells 4 of the frame 1. The material of the frame 1 additionally covers the inner side walls of simple inserts 3 Il the inner side wall parts 5 composite inserts. In the outer side walls of the frame 1 is made of Windows 8, at least one of two opposite sides of each insert. Insets are the corresponding Windows of the protrusions 9, which serve as an additional attachment in the body of the pad.

In the mounting lugs 2 is placed a heat-resistant elastic damping sleeve 10 with holes 11 for elastic mount twin lever by means of a vertical roller. Arising from the interaction of the pads from the brake disc vibration are absorbed by these heat-resistant elastic damper bushings.

Solid inserts 3 or part 5 of the composite inserts friction element is placed in a mold and pour molten iron, steel or alloy with hardness not more than 255 HB, which allows to obtain a monolithic block with strong and reliable fastening of inserts or parts thereof.

Solid inserts 3 or part 5 of the composite inserts friction element is made from materials selected from the range: minerals-carbides, silicides, metals and their alloys; polymers with fillers, carbon fibre, PTFE, thermoplastic; cermets.

Solid inserts 3 or part 5 of the composite inserts friction element is prepared by casting or pressing followed by sintering.

Frame 1 pads perform castings or teams welded with 4 cameras for whole inserts or with 4 cameras, split pereg rodomi 7 cell 6 for composite inserts. Camera 4 or 6 cell filled composite filler which presoviet and is sintered with the formation of solid inserts or parts of a composite inserts, integrally connected to the frame 1. As such materials are used, for example, the friction material tier-303 mixed with chips of cast iron, other metals and minerals.

Frame 1 pads perform castings or teams welded with 4 cameras for whole inserts or 4 cameras separated by partitions 7 cell 6 for composite inserts. Camera 4 or 6 cell filled composite filler hardened by chemical reaction, with the formation of solid inserts or parts of a composite inserts, integrally connected to the frame, for example, a mixture of liquid glass Na2SiO3with the aluminum oxide of Al2About3or other metals, minerals, followed by placement in an environment of carbon dioxide CO2while solidification takes place filled mixture.

Technologies for pads provide a complete monolithic body pads and friction elements, which provides not only the reliability of fastening, but also good heat dissipation.

The materials of which make the friction elements have a high resistance to heat and abrasion, which provides a brake for railway rolling stock when the speed of the movement of 360 km/h or more, in accordance with the standards of safety on railway transport of the Russian Federation. However, these pads can be used for rolling stock with lower speeds.

The base parts 5 composite inserts can be made in the form of a truncated cone and can be of geometric type, selected from a series: circle, ellipse (Fig.7D, E).

The base parts 5 composite inserts can be made in the form of a truncated pyramid and can be of geometric type, selected from a series: triangle, quadrilateral, Pentagon, hexagon (Fig.8F, L, M, O, P, R, S, T).

The working area of the brake pads composed of 8% of the area of the body frame and 92% of the area of the friction inserts that provides effective braking mode. Upon wear of the working surface due to the form of solid inserts and parts composite inserts, the area of the friction element is increased to 95%, which increases the coefficient of friction and reduces the braking distance.

The installation dimensions of the pads are made according to GOST and fully comply with the installation dimensions of the existing pads.

In addition, for pads, representing a monolith, there is no need for protection from atmospheric precipitation and temperature impacts the environment.

Winter and summer condition inserts monitored visually through the window in which the iron surface of the frame.

Set in the lugs 2 heat-resistant elastic damping sleeve 10 provides the elasticity of the landing pads in the twin levers that prevents vibration and destruction of friction material for braking, and provides a smooth touch and the waste pads, suppressing the occurrence of noise.

The pad consists of a small number of parts, which allows for the simple construction of the pad, therefore making it easily automated.

In the manufacture of solid and composite inserts do not require high precision, because these elements having a wall with a slope, to form a frame connection type to "dovetail", filled with molten metal during solidification are securely fixed. In the manufacture of solid and composite inserts the crushing of granular composites in the frame, the camera or cells which have side walls and partitions with tilt system dovetail with subsequent sintering also ensures the integrity of a received block.

Receiving pads with solid inserts or composite inserts made of composite fillers, stiffening due to chemical reactions, also provides a monolithic structure.

The proposed disc brake pad for high-speed rolling stock with high tribological dormancy is the result.

In block solved the issue of heat dissipation due to:

the solidity of the contact frame with inserts;

- material frame advanced distributed between parts of a compound inserts, which greatly increases the surface area from which heat is removed;

- heat is removed through the openings made in the side walls of the frame.

The proposed design allows you to get a new technical result.

Equipment mounting lugs mounting pads heat-resistant elastic damping sleeve provides a flexible suspension pads in the paired arm. This provides a smooth soft approach of the brake pads during braking and interaction with the adjacent surface of the disk, thus avoiding vibration, sudden engagement of the friction surfaces, causing cracking, chipping and fracture of the friction elements. Smooth touch also reduces the noise in the brakes. Rigid fastening of the friction elements consisting of integral or composite inserts in the body of the pad-type dovetail, shaped like truncated pyramids or cones, the tabs on the level of the Windows in the side surfaces of the frame pads ensure a secure fit molded or welded casing.

The possibility of producing using different technology for the guy making can improve their quality and to vary the resulting technical indicators pads depending on the requirements of specific operating conditions on some rolling stock.

The proposed design of the pads provides high reliability of the brakes.

1. Disc brake pad, consisting of a frame and integrally connected to a friction element so that the material of the frame covers the outer side walls and adjacent to it the surface of the friction element on the rear side of the frame are mounting lugs, characterized in that the friction element consists of 1-4 inserts, the inserts can be one-piece or integral, one-piece insert is placed in the camera frame and is made in the form of truncated pyramids with a base in the form of a trapezoid or polygon deployed a smaller base to the work surface of the brake pads, with the slope of the side walls of α=10°-15°, with formation of compound with cameras frame type dovetail, composite insert is made of parts, the parts are placed in the cells of the camera frame and is made in the form of truncated pyramids or cones deployed a smaller base to the work surface of the brake pads with the slope of the side walls of α=10°-15°, with formation of compounds with a cell camera frame type "dovetail", frame material additionally comprises an inner side wall of solid inserts or inner side walls of the parts of a composite inserts in the outer side walls of the window frame is made no less real the two sides opposite each insert, and insert have the appropriate Windows ledges, in the mounting lugs placed heat-resistant elastic damping sleeve.

2. Disk brake pad according to claim 1, wherein the one-piece or composite inserts friction element pour molten iron, steel or alloy with hardness not more than NU.

3. Disk brake pad according to claim 1, wherein the one-piece or composite insert the friction element is made from materials selected from the range: minerals-carbides, silicides, metals and their alloys; polymers with fillers, carbon fibre, PTFE, thermoplastic; cermets.

4. Disk brake pad according to claim 1, wherein the one-piece or composite inserts friction element is prepared by casting or pressing followed by sintering.

5. Disk brake pad according to claim 1, characterized in that the frame pads perform castings or teams welded with cameras for whole inserts or with cameras, divided into compartments for parts of a composite inserts, camera or cell fill composite filler, which is pressed and is sintered with the formation of solid inserts or composite inserts, integrally United with the frame.

6. Disk brake pad according to claim 1, characterized in that the frame pads perform castings or teams welded with cameras for whole inserts Il the cameras, divided into cells for compound inserts, camera or cell fill composite filler hardened by chemical reaction, with the formation of solid inserts or composite inserts, integrally United with the frame.

7. Disk brake pad according to claim 1, characterized in that the base parts of a composite inserts made in the shape of a truncated cone and can be of geometric type, chosen from a number of: a circle, an ellipse.

8. Disk brake pad according to claim 1, characterized in that the base parts of a composite inserts made in the form of a truncated pyramid and can be of geometric type, selected from a series: triangle, quadrilateral, Pentagon, hexagon.

9. Disk brake pad according to claim 1, characterized in that the area of the friction element is not less than 92% of the area of the working surface of the pad.



 

Same patents:

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FIELD: transport engineering; brake systems of wheeled vehicles.

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The invention relates to a transport machine building, and is intended preferably for disk brakes of motor vehicles

Pad disc brake // 2219393
The invention relates to the field of transport engineering and is intended preferably for disk brakes of motor vehicles

The invention relates to a disc brake device for a vehicle

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FIELD: transportation.

SUBSTANCE: rail vehicle consists of body and carriages in journal-boxes of which wheel pairs axle necks (14) are located, and air brake system. On axle butt ends disks (12) are rigidly fixed which have magnetic nicks (13) interacting with mating nicks (6) located on other disks (5) fixed in journal-box (1) covers (2) and capable to move axially. Space between above mentioned disks is connected with control reservoir of air brake system.

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2 cl, 3 dwg

FIELD: railway transport.

SUBSTANCE: proposed disk brake drive fastening unit contains caliper mechanisms coupled with bogie frame supports, brake cylinder rod and housing of which are provided with vertical axles of hinge joints displaced in plane of caliper mechanisms, inner and outer levers of caliper mechanism hinge-coupled with supports of frame tie-rods hinge-connected by ends through vertical axles with inner levers for compressing the levers. Tie-rods relative to axle of brake cylinder are made in form of longitudinal movably interlocked rigid inner and outer systems with guides and jaws of supports of frames, cheeks centered by means of parts of shells connected in pairs and connected into systems by vertical axles of rod hinge joints, housing and inner levers.

EFFECT: improved efficiency of braking owing to provision of compact fastening of drive of disk brake.

4 cl, 12 dwg

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