EP2078831A3 - Surface treated rocker arm shaft - Google Patents

Surface treated rocker arm shaft Download PDF

Info

Publication number
EP2078831A3
EP2078831A3 EP09150266A EP09150266A EP2078831A3 EP 2078831 A3 EP2078831 A3 EP 2078831A3 EP 09150266 A EP09150266 A EP 09150266A EP 09150266 A EP09150266 A EP 09150266A EP 2078831 A3 EP2078831 A3 EP 2078831A3
Authority
EP
European Patent Office
Prior art keywords
rocker arm
surface treated
arm shaft
bearing surface
core portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09150266A
Other languages
German (de)
French (fr)
Other versions
EP2078831A2 (en
Inventor
Robert Lugosi
Steve Parkinson
James Prescavage
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roller Bearing Company of America Inc
Original Assignee
Roller Bearing Company of America Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roller Bearing Company of America Inc filed Critical Roller Bearing Company of America Inc
Publication of EP2078831A2 publication Critical patent/EP2078831A2/en
Publication of EP2078831A3 publication Critical patent/EP2078831A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2301/00—Using particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements

Abstract

A shaft (2, 19, 24, 124, 224) for a rocker arm assembly (1, 20, 120, 220) is disclosed. The shaft includes a substantially cylindrical outer surface (26, 126, 226) at least a portion (29, 129, 229) of which defines a bearing surface (28, 128, 228) thereon and an interior core portion (32, 132, 232) located radially inward of the bearing surface. The bearing surface (28, 128, 228) has a hardness greater than that of the core portion (32, 132, 232), for providing wear resistance and deterring crack initiation and propagation.
EP09150266A 2008-01-09 2009-01-09 Surface treated rocker arm shaft Withdrawn EP2078831A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1993608P 2008-01-09 2008-01-09

Publications (2)

Publication Number Publication Date
EP2078831A2 EP2078831A2 (en) 2009-07-15
EP2078831A3 true EP2078831A3 (en) 2011-08-24

Family

ID=40568591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09150266A Withdrawn EP2078831A3 (en) 2008-01-09 2009-01-09 Surface treated rocker arm shaft

Country Status (2)

Country Link
US (1) US20090173301A1 (en)
EP (1) EP2078831A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060067824A1 (en) * 2004-09-30 2006-03-30 O'hara Stephen J Turbocharger with titanium component
DE102009007342A1 (en) * 2009-02-04 2010-08-05 Hella Kgaa Hueck & Co. Method and device for determining an applicable lane marking
US8915224B2 (en) * 2010-12-18 2014-12-23 Caterpillar Inc. Rocker shaft shim
CN102242649A (en) * 2011-07-26 2011-11-16 奇瑞汽车股份有限公司 Rock arm shaft
US20140091063A1 (en) * 2012-09-28 2014-04-03 Electro-Motive Diesel, Inc. System for hardening a cylindrical metal component
CN111719109A (en) * 2020-06-30 2020-09-29 东科克诺尔商用车制动技术有限公司 Method for solving breakage of optical axis and threads of rocker shaft of steering gear

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349181A (en) * 1999-04-23 2000-10-25 Toledo Technologies Inc Interchangeable rocker arm assembly
EP1400606A1 (en) * 2002-07-30 2004-03-24 Koyo Seiko Co., Ltd. Method of carburizing a bearing steel to produce a roller member
DE10306865B3 (en) * 2003-02-19 2004-08-12 Daimlerchrysler Ag Manufacturing method for hardened shaft used in automobile drive transmission has shaft straightened before hardening process
US20050061600A1 (en) * 2003-09-22 2005-03-24 Holland Ronald A. Automatic dual-function clutch
EP1669556A1 (en) * 2004-11-17 2006-06-14 JTEKT Corporation Rocker arm bearing

Family Cites Families (20)

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Publication number Priority date Publication date Assignee Title
US4491500A (en) * 1984-02-17 1985-01-01 Rem Chemicals, Inc. Method for refinement of metal surfaces
JPS61286501A (en) * 1985-06-12 1986-12-17 Ngk Insulators Ltd Turbine rotor and its manufacture
US4705594A (en) * 1986-11-20 1987-11-10 Rem Chemicals, Inc. Composition and method for metal surface refinement
US4818333A (en) * 1987-08-03 1989-04-04 Rem Chemicals, Inc. Metal surface refinement using dense alumina-based media
USRE34272E (en) * 1989-05-04 1993-06-08 Rem Chemicals, Inc. Method and composition for refinement of metal surfaces
US4906327A (en) * 1989-05-04 1990-03-06 Rem Chemicals, Inc. Method and composition for refinement of metal surfaces
US5158629A (en) * 1989-08-23 1992-10-27 Rem Chemicals, Inc. Reducing surface roughness of metallic objects and burnishing liquid used
US5005544A (en) * 1990-02-06 1991-04-09 Spangler Earl M Rocker shaft support system for internal combustion engine
US5051141A (en) * 1990-03-30 1991-09-24 Rem Chemicals, Inc. Composition and method for surface refinement of titanium nickel
US5158623A (en) * 1990-03-30 1992-10-27 Rem Chemicals, Inc. Method for surface refinement of titanium and nickel
JP3235236B2 (en) * 1992-12-28 2001-12-04 スズキ株式会社 Evaporative fuel control device
US5507685A (en) * 1993-08-25 1996-04-16 Hoffman; Steve E. Method for surface finishing of difficult polish surfaces
US5848929A (en) * 1997-03-24 1998-12-15 H Technology Centrifugal finisher with fixed outer vessel and rotatable inner vessel
US6227942B1 (en) * 1999-04-21 2001-05-08 H-Semitran Llc Ferrofluidic finishing
US20020088773A1 (en) * 2001-01-10 2002-07-11 Holland Jerry Dwayne Nonabrasive media with accelerated chemistry
KR20030072018A (en) * 2002-03-05 2003-09-13 지엠대우오토앤테크놀로지주식회사 Structure for shock absorbing of rocker arm shaft for automobiles
DE10315416A1 (en) * 2002-06-27 2004-01-22 Ina-Schaeffler Kg Fixing the position of a bolt
JP2005030582A (en) * 2003-01-31 2005-02-03 Nsk Ltd Needle bearing, shaft, car cooler compressor, and planetary gear mechanism for automatic transmission
JP2005194986A (en) * 2004-01-09 2005-07-21 Honda Motor Co Ltd Valve operating characteristic variable device
US6962134B1 (en) * 2004-08-05 2005-11-08 General Motors Corporation Rocker arm shaft retainer and assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349181A (en) * 1999-04-23 2000-10-25 Toledo Technologies Inc Interchangeable rocker arm assembly
EP1400606A1 (en) * 2002-07-30 2004-03-24 Koyo Seiko Co., Ltd. Method of carburizing a bearing steel to produce a roller member
DE10306865B3 (en) * 2003-02-19 2004-08-12 Daimlerchrysler Ag Manufacturing method for hardened shaft used in automobile drive transmission has shaft straightened before hardening process
US20050061600A1 (en) * 2003-09-22 2005-03-24 Holland Ronald A. Automatic dual-function clutch
EP1669556A1 (en) * 2004-11-17 2006-06-14 JTEKT Corporation Rocker arm bearing

Also Published As

Publication number Publication date
EP2078831A2 (en) 2009-07-15
US20090173301A1 (en) 2009-07-09

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