Friction facing

FIELD: machine building.

SUBSTANCE: facing made as part of cylinder shell created with non-axial cylinder surfaces with parallel axes of rotation and ends of different thickness. Side surface of the facing limiting the facing from the side of a thin end, is made as two conjugating flat surfaces. Side surface of the facing, limiting the facing from the side of a thick end, is made as flat surface, not radial to radius of external surface of the facing.

EFFECT: reduced time for facing run-in during operation and simplification of manufacture of both facing and brake shoe with such friction facing.

1 dwg

 

The invention relates to pads, drum brakes of vehicles, in particular trucks.

Analogous to the claimed invention is a friction plate made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation and having razdolina ends with the side surfaces of the limiting plate by a thick and a thin end, made in the form of two paired flat surfaces arranged at an angle to each other (see RF patent №2230240, IPC7F16D 69/02, 2004). The essential features of similar "made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation and having razdolina ends with the side surfaces of the limiting plate, from thin end in the form of two paired flat surfaces arranged at an angle to each other" match the essential features of the claimed invention.

The disadvantage of analogue is the lack of stability of the frictional characteristics of the drum brakes in the changes of the coefficient of mutual overlap of the friction pairs during operation due to the presence of "bias" on the thin and thick end plates, which is Buslaeva when you wear the change of the areas of contact.

The prototype of the claimed invention is a friction plate made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation, and having razdolina ends, with the side surface of the restricting plate from the thin end, made in the form of two paired flat surfaces, and the side surface of the restricting plate from the side of the large end, made in the form of a flat surface, the radial radius of the outer working (convex) surface of the lining (see RF patent №74676, IPC7F16D 69/02, 2008). The essential features of the prototype is made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation and having razdolina ends, with the side surface of the restricting plate from the thin end, made in the form of two paired flat surfaces, and the side surface of the restricting plate from the side of the large end, is made in the form of a flat surface coincide with the essential features of the claimed invention.

The disadvantage of the prototype is the need for a sufficiently long break pads, due to the presence of a flat surface, the radial radius of the outer surface n of the masonry at its thickest end.

The task, which is aimed by the invention is the reduction of time needed break pads during operation. Another technical result is a simplification of manufacturing as linings and pads with the inventive overlay.

To achieve the technical result in the friction lining, made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation, and having razdolina ends, the side surface of the restricting plate from the thin end, made in the form of two paired flat surfaces, and the side surface of the restricting plate from the side of the large end, made in the form of a flat surface, predialing the radius of the outer surface of the lining.

The essential features of the claimed invention "lateral surface, limiting the pad from the side of the large end, made in the form of a flat surface, predialing the radius of the outer surface of the pads are different from the characteristics of the prototype.

The drawing shows part (thick end) of the inventive friction lining.

The friction pad is made from a polymeric friction composite and is part of a cylindrical shell formed by noonie 1 external (convex) and 2 internal (concave) cylindrical surfaces, having parallel axes of rotation (the axis of rotation of the external surface 3 and the rotation axis of the inner surface 4). The external cylindrical surface is working. The friction pad has the ends of different thicknesses. Lateral surface, limiting the pad-side end with a smaller thickness (not shown), made of two planes that are angled to each other. Lateral surface, limiting the pad-side end with a greater thickness, made in the form of a flat surface 5, predialing about the axis of rotation of the outer cylindrical surface of the lining. Thus the lateral surface can be both radial and predialing relative to the axis of rotation of the inner cylindrical surface of the lining. The cover plate may be provided with holes for rivets.

A specific example of the inventive product is drum brake lining truck, which has a radius R1the inner surface of 200 mm; the radius R2external (working) surface 206,5 mm; the distance b between the axes of rotation of the surfaces of the plates 12 mm When the line connecting the axis of rotation of the cylindrical surfaces of the pads, and thus orthogonal to each of them forms an angle α≈0°53' with a radial line (radius) of the inner cylindrical surface along the line it contacts the KTA flat side surface of a thick end plates. Thus the radius of the inner cylindrical surface of the lining along the line of its contact with the flat side surface of the large end is in the plane of the side surface of the large end of the overlay.

Be fabricated plate may known methods, for example, by molding in the mold, followed (if necessary) mechanical processing.

Running friction lining with the specified coordinate characteristics allows us to better meet the working surface of the brake drum and the working surface of the brake pads, which reduces the time required for the breaking-in of the friction pair. It also provides easier alignment of the workpieces (briquettes) in the manufacture of linings and ensures precise placement of the pads when the drilling and mounting pads on a metal frame. The result is simplified as the process of manufacturing the lining, and the process of manufacturing brake pads, increased accuracy of production. The result is improved operational characteristics of the brake Assembly.

Friction plate, made in the form of a cylindrical shell formed by non-axial cylindrical surfaces with parallel axes of rotation and having razdolina ends, with the side surface of the restricting plate member by a thin end, designed as two paired flat surfaces, wherein the side surface of the restricting plate from the side of the large end, made in the form of a flat surface, predialing the radius of the outer surface of the lining.



 

Same patents:

Friction facing // 2391579

FIELD: machine building.

SUBSTANCE: length of facing arc along internal surface and difference of thickness of facing on ends corresponds to ratio: where H2 is thickness of thick end of facing, H1 is thickness of thin end of facing, and L is length of facing arc along internal surface.

EFFECT: improved frictional characteristics of friction pair due to optimal correspondence of facing geometry to distribution of forces and pressure in drum brake.

1 dwg

Friction lining // 2388945

FIELD: transport.

SUBSTANCE: friction lining represents a part of cylindrical ring formed by misaligned cylindrical surfaces with parallel rotational axes and has different-thickness ends. Side surface limiting the lining on thin-end side represents two aligned flat surfaces. Side surface limiting the lining on thick-end side represents flat surface not radial to lining outer surface radius. Rotational axes of cylindrical surfaces are located in the plane that does not cross nor contact the lining.

EFFECT: shorter running-in during operation.

1 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

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

FIELD: machine building.

SUBSTANCE: invention relates to field of rail transport, particularly to linings of disk brakes. Lining of disk brake contains load-bearing slab, on which there are fixed elements for bearing on it of friction elements. Friction elements are installed single or pairwise on ends of resilient reference elements. Reference elements are fixed with gap on load-bearing slab fixing facility so that friction elements are located on projecting and free-variable end points of reference elements. Reference elements are located on load-bearing slab so, that its main axis is oriented in essence perpendicularly to radius, passing through center of brake disk.

EFFECT: improvement of technical features of lining and noise reduction during lining operation.

12 cl, 11 dwg

FIELD: railway transport.

SUBSTANCE: bimetal braking clamp comprises arc-bent cast pig-iron bar furnished with a boss arranged at rear side center and having a bore to receive wedge-like cotter-pin to be fixed in clamp holder. Said cast pig-iron bar body has cylindrical inserts arranged in rows and made from material that features higher abrasive properties compared with those of bar material. Groups of inserts are separated by sections with no inserts, said inserts being point-welded to steel plate repeating the shape of and covering bar rear side. Steel plate is perforated to have 25 mm-dia holes in compliance with arrangement of inserts in bar body. Two inserts should be located opposite each round hole. Insert face overlaps round hole area for 1/3. Insert face is eclectically welded to round hole edge. In casting, mould is filled so that steel plate round holes are filled with pig-iron. Square holes are arranged along steel plate edges to receive pig-iron U-section bosses. Length of section with no inserts exceeds both width.

EFFECT: uniform wear of braking surfaces, wheels locking in all braking conditions.

8 dwg

FIELD: railway transport.

SUBSTANCE: invention relates to railway transport, particularly to brake shoes. Proposed brake show comprises polymer friction material and metal carcass comprising perforated rear ledge with its length smaller than that of shoe rear part by 1 to 9 mm and 11 mm to 50 mm.

EFFECT: ease of manufacture.

1 dwg

Friction product // 2374519

FIELD: machine building.

SUBSTANCE: invention relates to friction products and can be used in brakes for car and rail vehicles. Product contains steel basis 1 with hollows 2, covered by two layers 3 and 4 of bronze, and cover plate made of ceramic-metal, implemented of two layers 5, 6, corresponding mixture of sintered metallic and non-metallic sintered components. Thickness of layer 4 of bronze considerably increases thickness of bronze layer 3, and layer 5 of ceramic-metal is implemented with cavities, filled by material of layer 6, and amount of silica and graphite oxide in the latter increases amount of those components in layer 5.

EFFECT: adhesion increasing between metallic basis and cover plate, increasing of resistance to formation in cover plate of splits, longitudinal and transverse cracks.

6 cl, 2 dwg

Railway brake block // 2372230

FIELD: railway transport.

SUBSTANCE: invention relates to the railway transport, in particular to brake blocks of the railway transport brakes. Brake block without metal support plate has metal insert containing the main body, two wing-shaped feathers integrated into the main body, located on its opposing sides, digressed wherefrom and having backside surfaces adjacent to the backside surface of the brake block. It also has two mostly parallel feathers spreading in radial direction and integrated into the main body and/or to the wing-shaped feathers. Parallel feathers form the keyway. When the brake block is installed at the brake head the keyway passes through the hole located in the brake head.

EFFECT: invention increases the technical characteristics of the block.

8 cl, 19 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to structural powder metallurgy, particularly to powder frictional material. It can be used for manufacturing of components of disk brakes, particularly, lining of disk brakes. Material contains, wt %: tin 1.8-3, iron 7-20, graphite 7-20, fused alumina 1.5-2, ferromolybdenum 0.5-2 and copper-the rest.

EFFECT: material provides high frictional thermal stability and strength of components of disk brakes, and also high wear resistance of lining of disk brakes.

1 ex

Friction facing // 2391579

FIELD: machine building.

SUBSTANCE: length of facing arc along internal surface and difference of thickness of facing on ends corresponds to ratio: where H2 is thickness of thick end of facing, H1 is thickness of thin end of facing, and L is length of facing arc along internal surface.

EFFECT: improved frictional characteristics of friction pair due to optimal correspondence of facing geometry to distribution of forces and pressure in drum brake.

1 dwg

Friction lining // 2388945

FIELD: transport.

SUBSTANCE: friction lining represents a part of cylindrical ring formed by misaligned cylindrical surfaces with parallel rotational axes and has different-thickness ends. Side surface limiting the lining on thin-end side represents two aligned flat surfaces. Side surface limiting the lining on thick-end side represents flat surface not radial to lining outer surface radius. Rotational axes of cylindrical surfaces are located in the plane that does not cross nor contact the lining.

EFFECT: shorter running-in during operation.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to cam-driven block brakes and their components. Cam (38) has one or several ledges (62, 64) with multiple sections (62A-C, 64A-C) that feature various profiles in axial cross section. Varying the cam profile allows producing the cam with the extreme outer ends or apexes of the ledges with length exceeding that of common cams, the mechanical strength being preserved. Increased travel of brake shoes allows using brake shoe lining of increased thickness.

EFFECT: longer life of brake shoe linings.

45 cl, 11 dwg

FIELD: railway transport; brakes of rolling stock.

SUBSTANCE: proposed brake shoe contains cast iron bar on rear side of which boss is arranged containing steel member for wedge-like cotter of shoe holder made in form of shaped section of steel plate enclosing the boss. Hole to pass wedge-like cotter is made in boss. Member is secured on steel plate covering bra from rear side and passing under boss. Found at edges of bar over ends of steel plate are T-shaped cast iron projections for engagement with brake shoe holder. Inserts made of material, abrasiveness differing from abrasiveness of cast iron bar are fitted in body of cast iron bar. Inserts are cylindrical, being arranged on steel plate with embedding into cast iron bar in two groups. Centers of three nearest inserts in each group are equidistant from each other. Groups of inserts are separated by section without inserts, and four extreme cylindrical inserts in groups are provided with ring grooves on side surface. Each group consists of seven insets.

EFFECT: increased balanced service life, reliability, efficiency increased service life of wheels owing to reduction of their wear caused by brake bimetallic shoes.

12 cl, 5 dwg

FIELD: railway transport; brakes of rolling stock.

SUBSTANCE: proposed bimetallic brake shoe contains cast iron bar made by molding and steel plate from which steel cylindrical inserts pass into cast iron bar which are arranged in two parallel rows. Inserts are made of material whose abrasiveness is higher than material of bar. Steel plate is placed longitudinally under boss and it covers entire surface of rear side of cast iron bar. It contains middle profiled section enclosing cross boss. Extreme cylindrical inserts in rows are provided with ring grooves on side surface. Diameter d of each cylindrical insert is found from formula d=(0.16-0.32) x B where d is diameter of cylindrical insert; B is width of working surface of shoe, and T-areas of working surface of shoe without inserts is calculated by formula T=(5.0-9.2) x t where T is area of working surface; t is sum of working surfaces of inserts.

EFFECT: improved operating characteristics of shoe, increased balanced service life, reliability, efficiency, increased service life of wheels of rolling stock owing to reduction of their wear caused by brake bimetallic shoes.

10 cl, 4 dwg

The invention relates to mechanical engineering and can be used in the chamber brakes in the automotive industry

The invention relates to a transport machine building, and is intended for drum-type brakes

Friction facing // 2391579

FIELD: machine building.

SUBSTANCE: length of facing arc along internal surface and difference of thickness of facing on ends corresponds to ratio: where H2 is thickness of thick end of facing, H1 is thickness of thin end of facing, and L is length of facing arc along internal surface.

EFFECT: improved frictional characteristics of friction pair due to optimal correspondence of facing geometry to distribution of forces and pressure in drum brake.

1 dwg

Friction lining // 2388945

FIELD: transport.

SUBSTANCE: friction lining represents a part of cylindrical ring formed by misaligned cylindrical surfaces with parallel rotational axes and has different-thickness ends. Side surface limiting the lining on thin-end side represents two aligned flat surfaces. Side surface limiting the lining on thick-end side represents flat surface not radial to lining outer surface radius. Rotational axes of cylindrical surfaces are located in the plane that does not cross nor contact the lining.

EFFECT: shorter running-in during operation.

1 dwg

FIELD: transport.

SUBSTANCE: proposed brake comprises brake drum with cooling device, brake shoes with friction linings, show springs, brake disk and drive. Said cooling device represents cylindrical heat pipes arranged in identical-diametre through holes regularly spaced along perimetre at the brake drum center, perpendicular to friction surface. Plugs are arranged in heat pipes, on the side of brake drum rim. There are wedge-like rectangular-section through holes at heat pipes center to receive wedge-like plates to make extra heat exchange surfaces that contact brake drum non-working surfaces by their inner faces. Wedge-like plate outer surface features grooves accommodating spring ring.

EFFECT: reduced thermal load, increased service life.

2 dwg

Friction item // 2369784

FIELD: instrument making.

SUBSTANCE: invention is related to the field of friction items, in particular to brake pads of drum brakes in vehicles. Friction item is equipped with openings for rivets installed in rows on both sides from plane of item symmetry at the same distance from plane of item symmetry. Ratio between distance from opening centres to plane of item symmetry and difference of maximum and minimum thickness of item in zone of its working surface makes from 6 to 26.

EFFECT: invention provides for better operational characteristics of pad with varioys thickness due to optimisation of stresses that occur in pad in process of operation.

2 cl, 2 dwg

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