Rail vehicle brake shoe

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

 

The invention relates to brake devices, namely to the brake pads railway rolling stock.

The famous cast-iron brake rail pads, including with a metal frame, manufactured according to GOST 1205-73. These pads have a positive impact on the surface of the rolling wheel, but they do not provide a high coefficient of friction, have insufficient wear resistance, are large (up to 16 kg) weight, require more effort pressing lever transmission during braking, do not provide silent and smooth braking of a train and not reliably operate in icing conditions.

The analogue of the claimed pads is also a brake pad containing a pair of solid inserts on the friction part, symmetrical about the horizontal axis of the pad and overlying its frictional portion across the width (A.S. USSR 159186, MPK 61 h, 1963).

The material of the inserts increases the efficiency of interaction of the pads with the wheel rim when water is present in the friction zone (rain, snow). Known deficiencies: insert retained in the composite friction material due to the friction and adhesion between the contacting between the surfaces of the inserts and of the friction material and are manufactured by preformative composite friction mater the Ala at elevated temperature and pressure to a solid inserts in special molds. The design of these pads do not provide the required reliability, as with long-term and emergency braking is an intensive heat transfer from the zone of friction on the surface of solid inserts is fading and melting of composite material surrounding the insert, and therefore the mounting of these inserts is waning and they fail to fulfill its purpose until the fall of solid inserts of the pads.

The closest analogue is a brake pad comprising a metal frame-back on the outside surface, and the friction part of the pad is fastened on the frame insert of cast iron, spaced along the length of the pads and overlying the entire area of the cross section of the wear layer pads (.RU No. 2040361 C1, 6 B22D 19/02, F16D 65/04, from 1992.06.05).

The disadvantage of this block is the existence region of the junction between inserts of different metal working parts of the pads. When using metal when braking in icing conditions may occur conditions to insufficient braking efficiency.

The challenge which seeks inventive brake pad, is enhancing the braking efficiency of the brake pads in contact with water or ice in the friction zone, improving structural safety shoes when operating in conditions which the second cold climate and using frequent braking cycles. To achieve the technical result in brake Shoe for railway vehicles, comprising a metal frame-back with a hole for the pin in the Central ledge pads, frame-backrest made in the plan in the form of a rectangle with side walls along the entire length of the pad and at least two bridges connecting the side walls, arranged symmetrically on both sides of the Central protrusion pads, and contains the locking sampling under the composite friction element located inside the frame-backs.

In addition, the frame-backrest pads can be with a jumper in the shape other than rectangular, for example, in the form of a-line with short side near the back, and its height does not exceed the maximum allowable wear.

In addition, the pad may have a jumper with locking samples, made in the form of holes and/or protrusions, arranged in a checkerboard pattern.

The essential features of the claimed invention "frame-back, mostly out of metal, made in the plan in the form of a rectangle with side walls along the entire length of the pad and at least two ridges on each side of the Central protrusion of the pad containing the locking sampling under the composite friction element located inside the insert I which are different from the characteristics of the prototype. Be made Shoe can known methods.

The drawing shows a block, General view. Brake pad made in the form of arcuate rectangular beam 1 and the Central protrusion or tide 2 in the middle part, a hole 3 for fastening the pin, and the entire side surface is a solid insert 4, which is made with the ridges 5. On the jumpers in the appropriate places there are holes 6 and/or the protrusions 7.

Jumpers can be other than the rectangular shape, such as trapezoidal, as well as periodic profile along the length. Composite friction part or the insert 8 is inside the area bounded by a solid box 4.

The block operates as follows.

When the pressing of the friction surfaces of the pads to the wheel surface of the rim Catania contact during friction with inserts. Solid inserts cover a large part of the friction surface across the pads, so the chance of catching the bully box across the width of the pad increases. This leads to less wear basics pads, increases service life in operation. In the presence of water or solid ice box when braking rips and melts the ice at the beginning of the braking, and then the bulk of the load in this case is a composite part, and the metal serves to increase the heat transfer from the composite into the environment.

A specific example of the fabrication is a railway brake pad metal containing jumpers obtained, for example, by casting. The received frame is subjected to the further process of forming the pad in the mold with the composite polymer material. The composite is made by mixing a binder, fillers (for example, rubber mixer, molding, for example, in the mold, and further thermal and mechanical processing.

The use of polymer composite frame-backrest can improve heat transfer during heating pads in the process of frictional contact with the braking and subsequent abrupt cooling under the influence of external conditions.

1. Brake Shoe for railway vehicles, comprising a metal frame-back with a hole for the pin in the Central ledge pads, characterized in that the frame-backrest made in the plan in the form of a rectangle with side walls along the entire length of the pad and at least two bridges connecting the side walls and arranged symmetrically on both sides of the Central protrusion of the pad containing the locking sampling under the composite friction element located inside the frame-backs.

2. Brake pad railway rolling stock according to claim 1, characterized who eat the frame-backrest can be with a jumper in the shape other than rectangular, for example in the form of a-line with short side near the back, and its height does not exceed the maximum allowable wear.

3. Brake pad railway rolling stock according to claim 1, characterized in that it has a jumper with locking samples, made in the form of holes and/or protrusions, arranged in a checkerboard pattern.



 

Same patents:

FIELD: railway transport; brake shoes of rolling stock.

SUBSTANCE: proposed bimetallic brake shoe includes arch-shaped cast iron bar with boss for wedge-like lock pin for fastening in shoe holder. Cylindrical inserts made of material of higher abrasiveness than material of bar are arranged in longitudinal rows in body of cast iron bar. Inserts are attached to steel frame located on rear part of bar by sport welding. Inserts are arranged in two groups. Inserts within each group are arranged in two parallel rows. Extreme cylindrical inserts in rows are provided with ring grooves on side surface. Groups of inserts are separated by section without inserts P. Steel frame has shaped section enclosing boss of cast iron bar, with holes in side surface at level of hole in boss, for fixing shoe wedge-like lock pin.

EFFECT: increased balanced service life, improved reliability, efficiency, provision of ease of servicing of shoes, increased service life of wheels owing to reduced wear causing by bimetallic shoes, improved quality of shoes.

15 cl ,5 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

Braking block // 2296253

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.

Brake // 2295068

FIELD: mechanical engineering.

SUBSTANCE: brake comprises braking belt, mechanical drive, and braking pulley whose one flange is detachable and has hollow that receives central and two side sections with friction linings. The central section bears on the wavy spring. The side and central sections are in a contact with the double-sided wedge-shaped blocks for permitting radial movement of the section due to interaction of their sides with the wave springs. The periphery of the hollow is separated into sectors. Each of the sector receives the central section and two side sections spring-loaded by means of wavy springs of different rigidity. The spring that underlies the central section is magnetized. The inner conical surfaces of the flanges and surfaces of the sections that are in a contact with them are provided with radial hollows that receive the locking balls.

EFFECT: enhanced braking capabilities.

6 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; 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

Brake pad // 2153994
The invention relates to railway transport, in particular to the brake equipment of the traction rolling stock

Cast iron brake pad // 2040361

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 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; 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

The invention relates to the brake pads railway rolling stock

The invention relates to the brake pads railway rolling stock and can be used in railway transport

The invention relates to a device mechanization braking rolling stock on the humps railway and industrial transport

The invention relates to the brake pads railway rolling stock

The invention relates to the brake pads railway rolling stock

FIELD: railway transport; brake systems.

SUBSTANCE: method comes to isolation of control devices by means of disconnecting components in left control station and connecting with proper main lines in control station set into operation. Special units are installed in each control station including three-way locking units equipment with pneumatic latches and electric contactor elements to which corresponding taps of control devices and main lines are connected. Provision is made in left control station for reduction of adequate tap of driver's brake valve and simultaneous isolation of auxiliary brake valve from like main line by adequate of three-way locking unit by means of switch-handle. Clearing of control devices in control station set into operation is effected by discrete setting of three-way locking unit to isolate similar tap of driver's brake valve and communicating simultaneously auxiliary brake with like main line. Input unions of three-way locking units are connected with taps of driver's brake valve connected with supply main line. Opposite input unions of three-way locking units are connected with main line of auxiliary brake. Output unions of three-way locking units are connected with output taps of auxiliary brake valve.

EFFECT: provision of adequate locking of brakes and possibility of reduction of branch of driver's brake valve by means of standard three-way locking unit.

3 dwg

FIELD: mechanical engineering, namely, bushings with sliding working surface, for lever braking system of rail transport, for example, passenger and cargo, including tube railway cars.

SUBSTANCE: bushing of lever braking system of rail transport is made two-layered of polymer composite material, and consists of internal working sliding layer and external damping layer. Internal sliding layer is made of polymer anti-friction composite material, containing a mixture of poly-oxy-diasol and cotton fiber as fibrous filler. As power filler - silicon oxide in form of marshalite or colloid silica. As adhesive - polyvinyl-acetate and/or polyvinyl-butyrale. As anti-adhesive - zinc stearate and/or calcium stearate, and as binding agent - phenol-formaldehyde or cresol-formaldehyde resin in novolak and/or resol form. External damping layer is made of polymer anti-friction composite material, containing cotton fiber as fibrous filler. As powder filler - nitrile rubber. As adhesive - polyvinyl acetate and/or polyvinyl butyrale, as anti-adhesive - zinc stearate and/or calcium stearate, and also as binding agent - phenol-formaldehyde or cresol-formaldehyde reson in novolak and/or resol form.

EFFECT: increased lifetime of bushing due to decreased total wear of steel in friction couple, decreased intensiveness of linear wear, increased strength limit during compression and increased impact toughness while preserving resistance to segregation.

7 cl, 3 tbl

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