Friction component

FIELD: automotive industry.

SUBSTANCE: invention relates to automotive industry, particularly to drum brake linings. Proposed friction lining is produced from polymer friction material and features the shape of a part of cylindrical ring. Ratio of radii of the lining inner and outer surfaces varies from 1.030 to 1.060 with polymer matrix content in the said friction composite exceeding 22% by weight. Aforesaid ratio of radii of the lining inner and outer surfaces varying from 1.060 to 1.095, polymer matrix content in the said friction composite is smaller than or equal to 22% by weight.

EFFECT: higher operating performances.

1 dwg

 

The invention relates to friction products, namely, represents part of a cylindrical shell brake pads, drum brake vehicles, in particular cars and trucks.

Analogue and prototype of the claimed invention is friction products, having the form of a cylindrical shell (see Reference "Polymers in friction units of machines and instruments, Meters, machinery, 1988, s). The essential features of the prototype products, having the form of a cylindrical shell coincide with the essential features of the claimed invention.

The disadvantage of the prototype is the degradation of the performance of the product by narrowing the possible range of operation in case of implementation of products with different thickness and curvature due to the absence of the optimal ratio of physical-mechanical properties of polymer composite, which is made from the product, the product's shape.

The task, which is aimed by the invention is improved performance in the case of run products of various shapes by optimizing the ratio form of the product with the properties of the composite, from which it is made.

To achieve the technical result in friction product made from alimango friction composite material and having the form of a cylindrical shell, the ratio of the radii of the inner and outer surfaces of the product is to 1,030 1,060 when the content of the polymer matrix in friction composite more than 22 wt.% or to 1,060 1,095 when the content of the polymer matrix is less or equal to 22 wt.%.

The essential features of the claimed invention (ratio of the radii of the inner and outer surfaces of the product is to 1,030 1,060 when the content in the composite more than 22 wt.% the polymer matrix or to 1,060 1,095 when the content in the composite 22 wt.% or less of the polymer matrix") are different from the characteristics of the prototype.

The drawing shows the inventive friction product, side view.

Friction product is made of polymer friction composite and is part of a cylindrical shell with inner radius Rint.and outer radius Rthe outer.The composite includes a polymer matrix of a vulcanizate, Resita or their mixtures, powdered and fibrous fillers. The content of the polymer matrix in the composite more than 22 wt.% when.

Ifthe content of the polymer matrix in the composite is less than or equal to 22 wt.%.

A specific example of the inventive friction products is a pad drum brake, with the ratio of the radii of the outer and inner surface is of the shell 1,040 and the content of the polymer matrix in friction composite 23 wt.%.

To produce the claimed product can by known methods, for example by molding.

Performing friction products with the specified coordinate relationships between the characteristics of the product and composition of the polymer composite, which is made from a product that allows you to optimize the shape of the product and the properties of the material from which it is made. The result expands the range of performance of this product.

Friction products made from polymer friction composite material and having the form of a cylindrical shell, characterized in that the ratio of the radii of the inner and outer surfaces of the product is to 1,030 1,060 when the content of the polymer matrix in friction composite more than 22 wt.% or when the ratio of the radii of the inner and outer surfaces of the product from 1,060 to 1,095 content of the polymer matrix in such a composite is less than or equal to 22 wt.%.



 

Same patents:

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FIELD: chemistry.

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FIELD: mechanics.

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2 cl, 3 dwg, 4 ex

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4 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

Friction component // 2364769

FIELD: automotive industry.

SUBSTANCE: invention relates to automotive industry, particularly to drum brake linings. Proposed friction lining is produced from polymer friction material and features the shape of a part of cylindrical ring. Ratio of radii of the lining inner and outer surfaces varies from 1.030 to 1.060 with polymer matrix content in the said friction composite exceeding 22% by weight. Aforesaid ratio of radii of the lining inner and outer surfaces varying from 1.060 to 1.095, polymer matrix content in the said friction composite is smaller than or equal to 22% by weight.

EFFECT: higher operating performances.

1 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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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 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

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 facing // 2391580

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

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