Friction item

FIELD: machine building.

SUBSTANCE: friction item includes a metal frame with holes. A friction element moulded onto it is equipped with projections arranged inside the holes. A polymer damping layer and an anti-noise metal plate with bent elements is fixed in the holes of the metal frame to the projections of the friction element. An additional polymer damping layer is fixed on the surface of the metal plate, which is opposite to its surface facing the metal frame. The surface of the additional damping layer, which is opposite to its surface facing the metal plate, has projections.

EFFECT: increasing the noise absorbing ability of an item.

2 dwg

 

The invention relates to the field of engineering, namely for friction products containing a reinforcing metal frame, such as pads of disc brakes of cars, friction products for various machines and equipment and so on

Analogous to the claimed invention is a friction article containing a metal frame and reformovanii to him polymer composite friction element, the surface of the metal frame, opposite the surface to which preferowan polymer composite friction element ("back" side of the frame) coated with anti-noise primer (mastic), which is fixed on the surface of the metal frame and forms a so-called "external damper" (see Marcon. Style professionals. Product catalog. Yaroslavl, 2003, S. 6; the Art of silence. The magazine "Behind the wheel", No. 04, 2005, S. 179). The essential features of similar "metal frame, reformovanii polymer composite friction element, the surface of the frame opposite the surface to which preferowan polymer composite friction element coated with anti-noise primer, fixed on the surface of the metal frame" coincide with the essential features of the claimed invention.

The disadvantage of analog is prob the possibility of rapid extrusion antinoise mastic from the contact zones of the frame pads with the working elements of the brake caliper (piston, bracket and other), resulting in stops the effect of noise and vibration when braking.

Another analogue of the claimed invention is a friction article containing a metal frame and reformovanii to him polymer composite friction element on the surface of the metal frame, opposite the surface to which preferowan polymer composite friction element fixed antinoise metal plate (see Shinox. Brake Noise Bulletin/ http://www.trelleborg.com/en/Automotive/Technology/Brake-Bulletin/, 21.01.2011,). The essential features of similar "metal frame, reformovanii polymer composite friction element fixed antinoise metal plate" coincide with the essential features of the claimed invention.

The disadvantage of analogue is the lack between the metal plate and the surface of the metal frame of the damping layer, the absorbing vibrations and sound waves. In result, you are unable to achieve adequate anti-noise effect.

Another analogue of the claimed invention is a friction article containing a metal frame and reformovanii to him polymer composite friction element on the surface of the metal frame, opposite the surface to which at orowan polymer composite friction element, fixed antinoise metal plate, which on the surface facing the surface of the metal frame, fixed damping polymer layer (see Hinox. Brake Noise Bulletin/ http://www.trelleborg.com/en/Automotive/Technology/Brake-Bulletin/, 21.01.2011,). The essential features of similar "metal frame, reformovanii polymer composite friction element fixed antinoise metal plate" coincide with the essential features of the claimed invention.

The disadvantage of analog is the difficulty of reliably fixing antinoise plate on the surface of the metal frame, which requires the presence on the surface of a skeleton of special fasteners and/or adhesive layers, as well as special operations for fixing (e.g., expanding, gluing and so on).

Another analogue of the claimed invention is a friction article containing a metal frame with holes and reformovanii to him frictional element with tabs inside the holes of the frame, while on the surface of the metal frame, opposite the surface to which preferowan polymer composite friction element placed antinoise metal plate, which holes in the metal frame fixed unbent e is the elements as a metal frame, and the friction element (to shoulders), while on the surface of the metal plate facing to the surface of the metal frame, fixed damping polymer layer (see MST molded shim technology, www.nucap.com). The essential features of similar "metal frame with holes, reformovanii to him frictional element with tabs inside the holes of the frame, anti-noise metal plate fixed to the protrusions of the friction element coincide with the essential features of the claimed invention.

The disadvantage of analog is the complexity of manufacturing anti-noise plate for fixing on the surface of the polymer layer of damping material, the complexity of fixing with polymer layer metal plate and the metal frame in the holes (the tabs "snap"), and to the lugs of the friction element, and insufficient sound absorption ability of a product due to the lack of fixation of the damping layer directly on the surface of the metal frame of the product.

The prototype of the claimed invention is a friction article containing a metal frame with holes, reformovanii to him frictional element with tabs inside the holes of the metal frame, poly is Erny damping layer and the anti-noise metal plate with curved elements, fixed in the holes of the metal frame to the tabs of the friction element, the polymeric damping layer is fixed on the surface of the metal frame, opposite the surface to which preferowan friction element, the surface of the damping layer facing the antinoise metal plate made with the tabs and bent elements antinoise metal plate made in the form of boards and fixed in the holes of the metal frame to the tabs of the friction element (see patent RU 2483232, IPC F16D 65/092, 2013).

The essential features of the prototype - "metal frame with holes, reformovanii friction element with the tabs inside the holes of the metal frame, damping polymer layer, a metal plate with curved elements fixed in the holes of the metal frame to the tabs of the friction element damping polymer layer is fixed on the surface of the metal frame, opposite the surface to which preferowan friction element, the surface of the damping layer facing the antinoise metal plate made with the tabs bent elements antinoise metal plate made in the form of boards and fixed in the holes of the metallic what about the frame to the tabs of the friction element" - coincide with the essential features of the claimed invention.

The disadvantage of the prototype is reduced soundproofing capability of the product due to the lack of damping layer on the surface of the metal plate facing to the brake caliper. Usually available on this surface layer of polymeric dye does not have the necessary damping capacity, and promotes corrosion protection of the metal plate and the metal frame.

The task, which is aimed by the invention, is to increase soundproofing capability of the product by placing the product additional sound-absorbing layer of variable thickness.

To achieve the technical result in friction product, containing a metal frame with holes, reformovanii to him frictional element with tabs inside the holes of the metal frame, anti-noise metal plate with curved elements in the form of flanges fixed in the holes of the metal frame to the tabs of the friction element damping polymer layer is fixed on the surface of the metal frame, opposite the surface to which preferowan friction element, the surface dangerous the layer, converted to a metal plate made with the protrusions on the surface of the metal plate, the opposite surface of the metal plate facing to the metal frame, fixed additional damping polymer layer, the surface of the additional damping layer opposite to the surface facing the metal plate, made with the tabs.

The essential features of the claimed invention is "on the surface of the metal plate opposite to the surface facing the metal frame, fixed additional damping polymer layer, the surface of the additional damping layer opposite to the surface facing the metal plate, made with the tabs are different from the characteristics of the prototype.

In Fig.1 shows a friction product, view from the metal frame. In Fig.2 shows a section a-a part of the friction products (in the zone of one of the holes in the frame and a corresponding protrusion of the friction element).

Friction product contains metal frame 1, which may be flat or curved (for example, in the form of a cylindrical shell or a more complex shape). The frame is made of 2 holes (one or more). Holes could the t to be round, oval, rectangular or other shape. To the frame preferowan friction element 3, provided with projections 4, corresponding to its location to the holes in the frame. The number of projections may equal the number of holes in the frame or smaller. The shape of the protrusions can repeat the form of holes or different from it, the height of the protrusions may be equal to or less than the depth of the holes. The friction element can be manufactured, for example, from a polymer composite friction material containing a polymer matrix and dispersed, including fibrous fillers. On the inner surface of the frame (the surface 5 opposite to the surface 6 to which preferowan friction element) posted by damping polymer layer 7 (layer mastics, primers and other) fixed (for example by adhesion, bonding, etc.,) on this surface. On top of the damping layer placed antinoise metal plate 8. The shape of the metal plate may conform to the shape of the metal frame or differ from it. The surface 9 of the damping layer facing the antinoise metal plate with protrusions. In antinoise metal plate with holes flared, so there are deflected elements 10 in the form of boards, which placed the us in the holes of the metal frame and fixed in the tabs of the friction element. The damping layer is in contact with metal plate mainly in the areas of the projections on the damping layer. On the surface 11 of the metal plate (the surface opposite to the surface 12 facing the metal frame) posted by additional damping polymer layer 13 (layer mastics, primers and other) fixed (for example by adhesion, bonding, etc.,) on this surface. The surface 14 additional damping layer (the surface opposite to the surface 15 facing the metal plate with tabs.

A specific example of the invention is a pad disk brake VAZ, containing flat metal frame with holes. To the frame preferowan friction element with protrusions corresponding to the holes in the frame. The element is made of a polymeric friction composite. As damping polymer layer used antinoise mastic (material protective antinoise brand AR 746 SKL). The thickness of the layer of mastic outside ledges ≈0.1 mm and ≈0.15 mm in the areas of the projections of the damping layer of mastic. Antinoise plate made of tin with a thickness of ≈0.5 mm, the height of the flanging ≈3 mm Additional damping layer is also made of anti-noise mastic layer thickness outside ledges ≈0.1 mm and ≈0.15 mm in the areas of the projections. The block can be painted (except the working surface of the friction element), for example, polymer powder dye.

Be made of the inventive friction product is well-known methods, for example by molding, metal frame pre-applied to the damping layer. Later in the mold is placed molding the polymer composition, of a metal frame with a damping layer and a metal anti-noise plate and carry out the molding and manufacturing pads known methods followed by the application of additional damping layer. While the tabs of the friction element are formed in the molding process by extrusion into the holes of the frame polymeric composition. In the metal frame preformulated the friction element and the frame (side holes) antinoise metal plate zavarovalna in the tabs of the friction element.

The inventive construction of the pad allows for the two damping layers separated by a metal plate, effectively damp the vibrations of the metal frame. Due to the interaction of the two damping layers fluctuations significantly attenuated. The result is improved sound absorption capacity of the product.

Friction products containing metal car the speakers with holes, reformovanii to him frictional element with tabs inside of the holes, the polymer damping layer is fixed on the surface of the metal frame, opposite the surface to which preferowan friction element, the surface of the damping layer facing the antinoise metal plate made with the tabs, and antinoise metal plate with curved elements in the form of flanges fixed in the holes of the metal frame to the tabs of the friction element, wherein on the surface of the metal plate opposite to its surface facing the metal frame, fixed additional damping polymer layer, the surface of the additional damping layer, opposite to its surface facing the metal plate, made with the tabs.



 

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FIELD: machine building.

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FIELD: machine building.

SUBSTANCE: proposed article comprises perforated metallic carcass and friction element vulcanised thereon and having ledges arranged inside perforations. Polymer damping layer and anti-noise metal plate with bent-off elements are locked in carcass holes towards friction element ledges. Polymer damping layer is locked at carcass surface opposite that whereon friction element is vulcanised. Said bent-off elements of anti-noise metal plate are made as boards to be locked in said perforations towards friction elements ledges without locking to said carcass.

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