Source: http://www.google.com/patents/US8209844?ie=ISO-8859-1
Timestamp: 2015-05-06 13:56:52
Document Index: 654790576

Matched Legal Cases: ['art.\n3', 'art.\n11', 'arts 3', 'arts 3', 'arts 3', 'arts 3', 'arts 3', 'arts 3']

Patent US8209844 - Brake pad for a disc brake - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA brake pad includes a support plate which is embodied as a cast piece as well as a friction lining that is attached therein. The support plate is provided with a planiform base and raised, positively connected parts, which are molded onto the base and are enclosed by the friction lining. At least some...http://www.google.com/patents/US8209844?utm_source=gb-gplus-sharePatent US8209844 - Brake pad for a disc brakeAdvanced Patent SearchPublication numberUS8209844 B2Publication typeGrantApplication numberUS 12/788,344Publication dateJul 3, 2012Filing dateMay 27, 2010Priority dateFeb 1, 2006Also published asDE102006004550A1, DE502007006098D1, EP1982091A1, EP1982091B1, US20090026028, US20100229369, WO2007088004A1Publication number12788344, 788344, US 8209844 B2, US 8209844B2, US-B2-8209844, US8209844 B2, US8209844B2InventorsFranz GasslbauerOriginal AssigneeKnorr-Bremse Systeme Fuer Nutzfahrzeuge GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (28), Non-Patent Citations (1), Referenced by (1), Classifications (8) External Links: USPTO, USPTO Assignment, EspacenetBrake pad for a disc brake
US 8209844 B2Abstract
A brake pad includes a support plate which is embodied as a cast piece as well as a friction lining that is attached therein. The support plate is provided with a planiform base and raised, positively connected parts, which are molded onto the base and are enclosed by the friction lining. At least some of the positively connected parts are surrounded in at least some areas by an adjacent cavity of the base, resulting in an improved connection of the friction lining to the support plate.
1. A process of making a brake pad for a disc brake, consisting essentially of:
providing a cast lining carrier plate having a substantially planar basic body, a plurality of elevated positive connection parts integrally cast together with the basic body, and each of said plurality of elevated positive connection parts being associated with a depression in the basic body adjoining said connection parts, each of said depressions being independent of any other of said depressions and extending below a surface face of the basic body in a region immediately adjacent its respective one of said connection parts; and
fastening a friction lining to the lining carrier plate so that the elevated positive connection parts are enclosed by the friction lining.
2. The process according to claim 1, wherein each of the adjoining depressions surrounds, at least in regions, the at least one connection part.
3. The process according to claim 1, wherein at least one of the connection parts is shaped as a peg extending away from the basic body, and wherein each peg has a polygonal or round cross-section.
4. The process according to claim 3, wherein the pegs are arranged in rows offset with respect to one another.
5. The process according to claim 1, wherein a plurality of the positive connection parts are configured as webs arranged spaced from one another.
6. The process according to claim 5, wherein said webs extend in a meandering manner over a surface of the basic body.
7. The process according to claim 5, wherein said webs extend parallel to one another over a surface of the basic body.
8. The process according to claim 1, wherein at least one connection part includes a recess on a free-end side facing away from the basic body, said recess being operatively configured to additionally secure the friction lining.
9. The process according to claim 8, wherein at least one of the connection parts is shaped as a peg extending away from the basic body, and wherein each peg has a polygonal or round cross-section.
10. The process according to claim 8, wherein a depth of the recess corresponds approximately to a height of the connection part.
11. The process according to claim 8, wherein the recess has a cavity-shaped configuration.
12. The process according to claim 11, wherein a depth of the recess corresponds approximately to a height of the connection part. Description
This application is a divisional of U.S. patent application Ser. No. 12/184,028, filed Jul. 31, 2008, the entire disclosure of which is expressly incorporated herein by reference and which is a continuation of PCT International Application No. PCT/EP2007/000615, filed Jan. 25, 2007, the entire disclosure of which is expressly incorporated herein by reference and which claims priority under 35 U.S.C. �119 to German Patent Application No. DE 10 2006 004 550.5, filed Feb. 1, 2006, the entire disclosure of which is expressly incorporated herein by reference and the priority of which is claimed.
The invention relates to a brake pad for a disc brake of a vehicle, in particular a commercial vehicle, having a lining carrier plate which is configured as a cast part and having a friction lining which is fastened in the lining carrier plate.
In addition to a brake disc, disc brakes for vehicles, in particular for commercial vehicles, also include two brake pads, which can be pressed against the friction faces of a brake disc when required, that is to say in the case of a braking operation.
Here, each brake pad includes a lining carrier plate and a friction lining which is fastened thereto and bears frictionally against the associated friction face of the brake disc in the use position.
Special significance is given to the connection of the friction lining to the lining carrier plate, since high loads occur resulting from jolts caused by operation and from frictional heat produced during braking.
In order to produce a correspondingly fixed connection which, in addition to the above-mentioned jolt and thermal loading, can absorb bending and shearing loads that occur, it is known, for example, from DE 195 32 019 C1, to integrally form positive connection mechanisms in the form of round or angular, lug-shaped elevations on a basic body of the lining carrier plate. In order to anchor the friction lining, in particular in order to absorb shearing forces, the positively connected parts are provided with undercuts, which can be produced, however, only in a very complicated process. Here, the friction lining is held positively only on the positively connected parts, with the result that there is the risk that, if the friction lining tears, parts are released from it, which not only limits the functional capability of the disc brake overall to a great extent, but possibly leads to its failure, since the released parts can jam in the brake caliper and impede the displacement movement of the brake pads and/or the brake disc.
Moreover, the production of the known brake pad is very expensive, above all also for the reason that the mold bodies which are used in the mold and include an elastomer for the formation of the positive connection mechanisms of the lining carrier plate are subjected to high wear and, therefore, have to be replaced frequently. Special significance is given to this circumstance precisely because brake pads of this type are used in large quantities.
The invention is therefore based on the object of further developing a brake pad such that it can be produced less expensively while improving its functional reliability.
According to the invention, a brake pad for a disc brake of a vehicle, in particular a commercial vehicle, has a lining carrier plate which is configured as a cast part, and has a friction lining, which is fastened in the lining carrier plate. The lining carrier plate has a flat-shaped basic body and elevated or raised positively connected parts, which are integrally cast thereon and are enclosed by the friction lining. At least one part of the positively connected parts is surrounded, at least in regions, by an adjoining depression of the basic body.
As a result of this structural embodiment of the brake pad, both less expensive production and an improvement in the adhesion of the friction lining material on the basic body are possible.
Since undercuts which are to be introduced in a targeted manner are dispensed with, the lining carrier plate can be cast in a substantially simpler and less expensive manner. This relates to both the casting itself and preparatory work, such as the production of a sand mold and the like, and also to the unproblematic production of the casting mold which is then possible and in which the use of correspondingly elastic mold means can be dispensed with, so that a considerably higher service life of the corresponding model results. Overall, the invention leads to a substantial cost reduction of the brake pad, which cost reduction has a particular significance in view of the series production of such brake pads.
Although the introduction of predefined undercuts is dispensed with, the production-related roughness of the cast surface on its own leads to interlocking of the friction lining with the elevated, positively connected, parts, just as otherwise with the surface of the basic body.
The embedding of the friction lining into the depressions of the basic body which surround at least a part of the positively connected parts at least in regions ensures additional security for holding the friction lining on the lining carrier plate, which depressions make possible improved absorption of shearing forces that occur and additionally guarantee improved securing of friction lining parts if the friction lining is destroyed, for example, by the formation of cracks. That is to say, the friction lining parts continue to adhere to the carrier plate even when the brake is not in engagement, that is to say, is released.
The shape, dimensions and arrangement of the positively connected parts can be of different designs. Here, the configuration of the positively connected parts is substantially dependent on the force absorption which occurs during braking, the temperature which is produced, and the properties of the friction materials used (which can be different as a result of various production processes and compositions).
For instance, the positively connected parts can be integrally molded in the form of round or rectangular pins or pegs, which are arranged offset with respect to one another, in a row or extending obliquely in one or more directions. It is also contemplated to configure the positively connected parts as meandering webs, which are integrally cast such that they extend parallel to one another, for example.
Further advantageous embodiments of the invention are described and claimed herein.
FIGS. 1-3 show, in each case, one exemplary embodiment of a lining carrier plate of a brake pad according to the invention in a perspective view or a plan view; and
FIG. 4 shows a section through the lining carrier plate according to FIG. 3 in a perspective view.
The figures show, in each case, one exemplary embodiment of a lining carrier plate 1, which is a constituent part of a brake pad which, moreover, has a friction lining (not shown) connected fixedly to the lining carrier plate by means of positively connected parts 3.
The positively connected parts 3 of the lining carrier plate 1, which is composed of a cast material, are integrally cast onto a flat-shaped (basically planar) basic body 2 and, in the example shown in FIG. 1, are shaped as pegs which lie next to one another in offset rows and are of square or rectangular configuration in cross section.
According to the invention, the positively connected parts 3 are surrounded, in each case, by an adjacent depression 4 of the basic body 2, into which depression 4 the friction lining material which is to be applied is inserted.
The free end side of the positively connected parts 3, which faces away from the base plate 2, is provided with a recess 5 which, as can be seen very clearly, in particular in FIG. 4, is of a cavity-shaped configuration but can also certainly extend deeper into the positively connected parts.
In the example of FIG. 2, the positively connected parts 3 are configured as webs, which extend in a meandering manner over the planar basic body, and of which a plurality are arranged in parallel and at a spacing from one another. In each case, they are surrounded by a depression 4, while the free end side has a recess 5 here also.
The example which is shown in FIG. 3 is comparable with the exemplary embodiment in FIG. 1, in the former the positively connected means 3 likewise being shaped as pegs or pins but of round cross section and likewise being provided with recesses 5, like the positively connected means 3 which are shown in the other examples.
The depressions 4 surrounding the positively connected parts 3 are configured in this case in the manner of circular rings, as can be seen in FIG. 4.
Just like the depressions 4, the recesses 5 ensure fixed anchoring of the friction lining, in particular also with regard to absorbing the shearing forces that occur.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2879866 *Oct 28, 1954Mar 31, 1959Westinghouse Air Brake CoBrake shoe assemblageUS3693764Jan 21, 1971Sep 26, 1972IttSpot-type disc brake shoeUS4569424 *Jan 27, 1984Feb 11, 1986Taylor Jr James LBrake shoe constructionUS4799579Nov 18, 1985Jan 24, 1989Myers Paul AClutch and brake friction assembly and method of making sameUS5033590Mar 19, 1990Jul 23, 1991Tokico Ltd.Brake friction padUS5129487Dec 20, 1990Jul 14, 1992Tokico Ltd.Friction pad for use in disc brakeUS5141083Apr 27, 1990Aug 25, 1992Burgoon Donald LBrake pad for a disc brake systemUS5285873Feb 19, 1992Feb 15, 1994Ray ArbesmanDisk brake friction assemblyUS5890566Mar 19, 1997Apr 6, 1999Akebono Brake Industry Co., Ltd.Friction pad for disc brakeUS6135244Jul 21, 1997Oct 24, 2000Alliedsignal Materiaux De FrictionPlate device for supporting at least one brake pad for a vehicle disc brakeUS6267206Nov 30, 1999Jul 31, 2001Alliedsignal Bremsbelag GmbhBrake lining for disk brakesUS6279222 *Jul 22, 1996Aug 28, 2001Federal-Mogul Technology LimitedManufacture of brake padsUS6367600 *Jan 4, 1999Apr 9, 2002Ray ArbesmanDisc brake backing plate and method of manufacturing sameUS6623581 *Dec 1, 1997Sep 23, 2003R�tgers Automotive AktiengesellschaftMethod for regenerating brake liningsUS6860368Jan 3, 2003Mar 1, 2005Federal-Mogul World Wide, Inc.High friction brake shoe assemblyUS20070170023Feb 2, 2006Jul 26, 2007Katsuhiro YamamotoDisc brake pad, back plate for pad and method of manufacturing back plate for padAT277311B Title not availableDE2242877A1 *Aug 31, 1972Mar 14, 1974Teves Gmbh AlfredRueckenplatte fuer die bremsbelaege von teilbelag-scheibenbremsenDE19507916A1Mar 7, 1995Sep 12, 1996Textar GmbhVerfahren zur Herstellung eines Bremsbelages, sowie eine Tr�gerplatteDE19532019C1Aug 31, 1995Feb 13, 1997Ae Goetze GmbhTr�gerplatte f�r Reibbel�geDE19650026C2Dec 3, 1996Apr 10, 2003Ruetgers Automotive AgVerfahren zum Regenerieren von Bremsbel�genDE69602602T2Jul 22, 1996Dec 9, 1999Federal Mogul Technology LtdHerstellung von bremskl�tzenEP0731288B1Mar 16, 1995Sep 27, 2000BBA Friction GmbHMethod for producing a brake pad and backing plate thereforEP0760436B1Apr 29, 1996Mar 29, 2000AE GOETZE GmbHBacking plate for brake liningEP0764043B1Jun 2, 1995Dec 19, 2001Purdue Research FoundationDevice for packing chromatographic stationary phasesGB1160503A Title not availableGB2299382A Title not availableGB2303891A Title not available* Cited by examinerNon-Patent CitationsReference1International Preliminary Report on Patentability including English translation (Eleven (11) pages).Referenced byCiting PatentFiling datePublication dateApplicantTitleUS20130175127 *Dec 19, 2012Jul 11, 2013Winston MacKelvieFriction plate* Cited by examinerClassifications U.S. Classification29/527.5, 188/250.00GInternational ClassificationB23P25/00, F16D69/00Cooperative ClassificationY10T29/49988, F16D69/04, F16D2069/0441European ClassificationF16D69/04RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services