Disc cutter and excavation equipment.docx

Disc cutter and excavation equipment.docx

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Disccutterandexcavationequipment

Disccutterandexcavationequipment

Abstract

Animproveddisctyperollingrockcutter,andnovelcutterheadsemployingsuchcutters.Arockcutterwithanimproved,simplifiedstructure,withcompactbearing,andsmooth,roundedbladeshapeisdisclosed.Thedesignincorporatesacutterring,bearingassembly,andsealassembly.Thecuttermaybeassembledanddisassembledforreworkbyasingleworkerwithsimplehandtools.Replacementofwornoutcutterringsisdonequicklyandeasilybyremovingtheoldringassemblyandthenslidinganewring,bearing,andsealassemblyontothecuttershaft.Thissimplifiedassemblyisachievedbyusingacomparativelylargeshaftwhichisnormallyintherangeof30-50%oftheringdiameter.Theshaftdesignissufficientlyrobusttopermitacantilevermountofthecutter.Theuniqueconfigurationallows30,000lbs.ormorethrusttobeappliedtoa5inchdiameterminiaturedisc.Thiscapacitypermitssingledisccuttertechnologytobeappliedtosmallerbitsorcutterheadsthanpreviouslypossible.Also,auniquemethodofshapingandinstallinghardmetalinsertsimprovescuttingefficiencyoverthelifeofthecutter,andincreaseswearlifeinhighlyabrasiveconditions.

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Inventors:

Friant;JamesE.（Seattle,WA）,Ozdemir;Levent（Golden,CO）

Assignee:

ExcavationEngineeringAssociates,Inc.（Seattle,WA）

Appl.No.:

08/684,194

Filed:

July19,1996

ParentCaseText

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Thisapplicationisacontinuation-in-partofapplicationSer.No.08/125,011filedonSep.20,1993nowU.S.Pat.No.5,626,201.

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Claims

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Whatisclaimedis:

1.Arollingdisccutterforuseinamechanicalexcavationapparatustoexertpressureagainstsubstantiallysolidmattersuchasrock,compactedearth,ormixturesthereofbyactingonafacethereof,saidcutterofthetypewhichuponrollingformsakerfbypenetrationintosaidfacesothat,whentwoormorecuttersareused,solidmatterbetweenaproximatepairofsaidkerfsisfracturedtoproducechipswhichseparatefromsaidface,whereinsaidrollingdisccuttercomprises:

（a）arelativelystiffshaft,saidshaftcomprising

（i）aproximalend,saidproximalendfurthercomprisinganoutwardlyextendingslopedflangewitharadiallyinwardsealingfacesurface,

（ii）adistalend,and

（iii）anaxisforrotationthereabout;

（b）acutterringassembly,saidcutterringassemblyfurthercomprising

（i）acutterring,saidcutterringfurthercomprising

（A）aninteriorannulus,saidinteriorannulushavingadistalside,and

（B）anouterringportion,saidouterringportionincludingacuttingedgehavinganoutsidediameterODandradiusR.sub.1,and

（C）aproximalside,saidproximalsidefurthercomprisingaproximallyinwardlyextendingflangewitharadiallyinwardsealingfacesurface;

（ii）abearing,saidbearing

（A）substantiallyfittingintosaidinteriorannulusofsaidcutterring,and

（B）positionedinaclosefittingrelationshipwithsaidshaft,sothatsaidcutterringrotateswithrespecttoandissupportedbysaidshaft;

（c）aseal,saidsealadaptedtofitsealinglybetween

（i）saidsealingfacesurfaceofsaidslopedflangeofsaidshaft,and

（ii）saidsealingfaceofsaidinwardlyextendingslopedflangeofsaidcutterring,toformalubricantretainingseal;

（d）aretainer,saidretaineradaptedtoretainsaidcutterringassemblyontosaidshaft;

（e）acap,saidcapsealinglyjoinedagainstsaidcutterringtocoversaiddistalendofsaidinteriorannulussothat,incooperationwithsaidsealandsaidcutterring,alubricantretainingchamberisprovidedtolubricatesaidbearing.

2.Arollingdisccutterforuseinamechanicalexcavationapparatustoexertpressureagainstsubstantiallysolidmattersuchasrock,compactedearth,ormixturesthereofbyactingonafacethereof,saidcutterofthetypewhichuponrollingformsakerfbypenetrationintosaidfacesothat,whentwoormorecuttersareused,solidmatterbetweenaproximatepairofsaidkerfsisfracturedtoproducechipswhichseparatefromsaidface,whereinsaiddisccuttercomprises:

（a）arelativelystiffshaft,saidshaftcomprising

（i）aproximalend,saidproximalendfurthercomprisinganoutwardlyextendingslopedflangewitharadiallyinwardsealingfacesurface,

（ii）adistalend,and

（iii）anaxisforrotationthereabout;

（b）acutterringassembly,saidcutterringassemblyfurthercomprising

（i）acutterring,saidcutterringfurthercomprising

（A）aninteriorannulus,saidinteriorannulushavingadistalside,and

（B）aproximalside,saidproximalsidefurthercomprisingaproximallyinwardlyextendingflangewitharadiallyinwardsealingfacesurface

（C）apairoflaterallyspacedapartsupportridges,saidridgeshavingtherebetweenagrooveformingportion,saidgrooveformingportionincluding

（1）apairofinteriorwalls,and

（2）aninteriorbottomsurfaceinterconnectingwithsaidinteriorwalls

（3）whereinsaidpairofinteriorwallsoutwardlyextendrelativetosaidinteriorbottomsurfacetotherebydefineaperipheralgroovearoundtheouteredgeofsaidcutterring,

（D）twoormorehardened,wear-resistantinserts,saidinsertspositionedwithinandlocatedinaradiallyoutwardrelationshipfromsaidgroove,saidinsertsfurthercomprising

（1）asubstantiallycontinuousengagingcontactportionofhavingoutsidediameterODandradiusR.sub.1,saidcontactportionontheoutersideofeachofsaidtwoormoreinsertsandadaptedtoactonsaidface,and

（2）alowergrooveinsertportion,saidlowergrooveinsertportion,having

（I）abottomsurfaceshapedandsizedincomplementarymatchingrelationshiprelativetosaidinteriorbottomsurfaceofsaidperipheralgroove,and

（II）firstandsecondopposingexteriorsidesurfaces,saidfirstandsecondexteriorsidesurfacesbeingshapedandsizedinacomplementarymatchingrelationshiprelativetosaidpairofinteriorwalls,and

（III）arotationwise,afrontportionandarearportion,

（3）whereinsaidlowergrooveinsertportionofsaidinsertsfitwithinsaidperipheralgrooveinaclosefittingrelationshipwhichdefinesaslightgapbetweensaidinsertsandeachofsaidpairofinteriorwalls,and

（4）asomewhatelasticpreselectedfillermaterial,saidpreselectedfillermaterialplacedbetweenyetsecurelyjoiningsaidinsertsinaspacedapartrelationshiptosaidinteriorbottomsurfaceandtosaidpairofinteriorsidewalls,saidpreselectedfillermaterialhavingamodulusofelasticitysothatsaidinsertscanslightlymoveelasticallyrelativetosaidcutterringsoastotendtorelievestressandstrainactingonsaidinserts;and

（ii）abearing,saidbearing

（A）substantiallyfittingintosaidinteriorannulusofsaidcutterring,and

（B）positionedinaclosefittingrelationshipwithsaidshaft,sothatsaidcutterringrotateswithrespecttoandissupportedbysaidshaft;

（c）aseal,saidsealadaptedtofitsealinglybetween

（i）saidsealingfacesurfaceofsaidslopedflangeofsaidshaft,and

（ii）saidsealingfaceofsaidinwardlyextendingslopedflangeofsaidcutterring,toprovidealubricantretainingseal;

（d）aretainer,saidretainerretainingsaidcutterringassemblyontosaidshaft;

（e）acap,sealinglyjoinedagainstsaidcutterringtocoversaiddistalendofsaidinteriorannulussothat,incooperationwithsaidsealandsaidcutterring,alubricantretainingchamberisprovidedtolubricatesaidbearing.

3.Therollingdisccutterassetforthinclaim2,whereineachofsaidtwoormoreinsertsfurthercomprise:

（a）aperipheralgrooveinsertportion,saidperipheralgrooveinsertportionfurthercomprising

（i）abottomsurfaceshapedandsizedincomplementarymatchingrelationshiprelativetosaidinteriorbottomsurfaceofsaidperipheralgroove,and

（ii）firstandsecondopposingexteriorsidesurfaces,saidfirstandsecondsidesurfacesbeingshapedandsizedinacomplementarymatchingrelationshiprelativetosaidpairofinteriorwalls;

（b）afaceengagingcontactportionofradiusR.sub.1,and

（c）rotationwise,

（i）aroundedleadingedgesurfaceportionofreducedcurvaturerelativetosaidfaceengagingcontactportionofradiusR.sub.1,and

（ii）aroundedtrailingedgesurfaceportionofreducedcurvaturerelativetosaidfaceengagingcontactportionofradiusR.sub.1.

4.Therollingdisccutterassetforthinclaim2orclaim3,whereinsaidfaceengagingcontactportionofeachofsaidtwoormoreinsertsfurthercomprise,intransversecross-section,asmoothlycurvedfaceengagingcontactportionedge.

5.Therollingdisccutterassetforthinclaim4,wherein,intransversecross-section,saidfaceengagingcontactportionedgeissymmetrical.

6.Therollingdisccutterassetforthinclaim5,wherein,intransversecross-section,saidfaceengagingcontactportionedgeissemi-circular.

7.Therollingdisccutterassetforthinclaim2,orclaim3,wherein

（a）saidcutterringiscomprisedofafirstmaterial,and

（b）saidtwoormoreinsertsarecomprisedofasecondmaterial,

（c）whereinsaidsecondmaterialischosenformaximizingservicelifewheninapositionofdirectcontactsaidsubstantiallysolidmatterbeingexcavated,and

（d）whereinsaidfirstmaterialwearsataratecomparable,giventheservicelocation,totherateofsaidsecondmaterial,sothatduringthelifeofsaidcutter