EP1357257A3 - Rocker arm made of sheet metal - Google Patents

Rocker arm made of sheet metal Download PDF

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Publication number
EP1357257A3
EP1357257A3 EP03003714A EP03003714A EP1357257A3 EP 1357257 A3 EP1357257 A3 EP 1357257A3 EP 03003714 A EP03003714 A EP 03003714A EP 03003714 A EP03003714 A EP 03003714A EP 1357257 A3 EP1357257 A3 EP 1357257A3
Authority
EP
European Patent Office
Prior art keywords
side walls
cam follower
wall thickness
sheet metal
crossbar
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.)
Granted
Application number
EP03003714A
Other languages
German (de)
French (fr)
Other versions
EP1357257A2 (en
EP1357257B1 (en
Inventor
Robert Kamm
Reinhard Ammon
Hubert Geus
Wolfgang Mayer
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler KG
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
Priority claimed from DE10218026A external-priority patent/DE10218026A1/en
Application filed by Schaeffler KG filed Critical Schaeffler KG
Publication of EP1357257A2 publication Critical patent/EP1357257A2/en
Publication of EP1357257A3 publication Critical patent/EP1357257A3/en
Application granted granted Critical
Publication of EP1357257B1 publication Critical patent/EP1357257B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • 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
    • F01L1/181—Centre pivot rocking arms
    • 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
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Abstract

Vorgeschlagen ist ein hebelartiger Nockenfolger (1) aus Blech, insbesondere für einen Ventiltrieb einer Brennkraftmaschine, mit zwei parallelen, durch einen Querbalken (2) verbundenen Seitenwänden (3a, 3b), wobei eine Unterseite (4) des Querbalkens (2) an einem Ende (5) eine Anlage (6) für wenigstens ein Gaswechselventil hat, welche Anlage (6) durch parallel zu den Seitenwänden (3a, 3b) verlaufende Führungswangen (7a, 7b) begrenzt ist, wobei der Nokkenfolger (1) an dem einen Ende (5) schmaler als über dessen restliche Erstreckung ausgebildet ist, wobei wenigstens in diesem Abschnitt den Seitenwänden (3a, 3b) eine geringere mittlere Wanddicke (DSM) als über deren weitere Länge immanent ist, welche Wanddicke (DSM) zumindest in diesem Bereich von Stirnseiten (8a, 8b) der Seitenwände (3a, 3b) in Richtung zu dem Querbalken (2) kontinuierlich zunimmt und wobei eine Dicke (DF) der Führungswangen (7a, 7b) kleiner als die mittlere Wanddicke (DSM) im Bereich des schmalen einen Endes (5) ist.Proposed is a lever-like cam follower (1) made of sheet metal, in particular for a valve train of an internal combustion engine, with two parallel, by a crossbar (2) connected side walls (3a, 3b), wherein a bottom (4) of the crossbar (2) at one end (5) has a system (6) for at least one gas exchange valve, which system (6) by parallel to the side walls (3a, 3b) extending guide cheeks (7a, 7b) is limited, the cam follower (1) at one end ( 5) is narrower than over its remaining extent, wherein at least in this section the side walls (3a, 3b) a smaller average wall thickness (D SM ) as immanent over its further length, which wall thickness (D SM ) at least in this range of End sides (8a, 8b) of the side walls (3a, 3b) in the direction of the transverse bar (2) increases continuously and wherein a thickness (D F ) of the guide cheeks (7a, 7b) smaller than the average wall thickness (D SM ) in the region narrow one End (5) is.

Ein derartiger Nockenfolger (1) benötigt im Bereich des einen Endes (5) nur sehr wenig Bauraum und hat ein besonders günstiges Massenträgheitsmoment.

Figure imgaf001
Figure imgaf002
Such a cam follower (1) requires in the region of one end (5) only very little space and has a particularly favorable mass moment of inertia.
Figure imgaf001
Figure imgaf002
EP03003714A 2002-04-22 2003-02-19 Rocker arm made of sheet metal Expired - Lifetime EP1357257B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US37455802P 2002-04-22 2002-04-22
US374558P 2002-04-22
DE10218026 2002-04-23
DE10218026A DE10218026A1 (en) 2002-04-23 2002-04-23 Lever-type cam follower for valve train of engine, has one end narrower than rest of cam follower length, in which side walls at one end of cam follower have smaller mean wall thickness than over rest of cam follower length

Publications (3)

Publication Number Publication Date
EP1357257A2 EP1357257A2 (en) 2003-10-29
EP1357257A3 true EP1357257A3 (en) 2007-09-19
EP1357257B1 EP1357257B1 (en) 2010-05-05

Family

ID=28792839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003714A Expired - Lifetime EP1357257B1 (en) 2002-04-22 2003-02-19 Rocker arm made of sheet metal

Country Status (3)

Country Link
US (1) US6729285B2 (en)
EP (1) EP1357257B1 (en)
DE (1) DE50312684D1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1637705A4 (en) * 2003-06-06 2009-11-04 Nsk Ltd Rocker arm and method of producing the arm
DE602004009087T2 (en) * 2003-08-27 2008-06-12 Gen Tek Technologies Marketing, Inc., Parsipanny METHOD FOR THE PRODUCTION OF A CAM-TURNED CRANKSHAFT
DE102004018387A1 (en) * 2004-04-16 2005-11-03 Ina-Schaeffler Kg Impact-pressed lever for the valve control of a piston engine and method for its production
US20060185636A1 (en) * 2005-02-23 2006-08-24 Gen Tek Technologies Marketing, Inc. Manufacturing a rocker lever using cold forming and welding
JP4525435B2 (en) 2005-04-14 2010-08-18 株式会社ジェイテクト Rocker arm
DE102006002994A1 (en) * 2006-01-21 2007-08-02 Schaeffler Kg Lever-like cam follower
US7836860B2 (en) 2007-11-21 2010-11-23 Charter Manufacturing Co., Inc. Engine rocker arm
JP5093920B2 (en) * 2008-02-05 2012-12-12 株式会社オティックス Rocker arm

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048475A (en) * 1991-01-17 1991-09-17 Henley Manufacturing Holding Company, Inc. Rocker arm
US5535641A (en) * 1993-11-29 1996-07-16 Koyo Seiko Co., Ltd. Rocker arm formed by pressing
JPH11270312A (en) * 1998-03-25 1999-10-05 Nakanishi Metal Works Co Ltd Rocker arm and manufacture thereof
EP1122408A1 (en) * 1999-08-18 2001-08-08 Koyo Seiko Co., Ltd. Rocker arm and method of manufacturing rocker arm body
DE10030341A1 (en) * 2000-06-20 2002-01-03 Schaeffler Waelzlager Ohg Lever tappet producing process involves forming guide cheeks of valve shaft fitting by cold forging

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05272310A (en) * 1992-03-27 1993-10-19 Ntn Corp Roller rocker arm and manufacture thereof
US5819694A (en) * 1997-05-15 1998-10-13 Welles Manufacturing Company Stamped roller-type cam followers with added height
US6199527B1 (en) * 1998-03-12 2001-03-13 Nsk Ltd. Sheet metal rocker arm, manufacturing method thereof, cam follower with said rocker arm, and assembling method thereof
US6615635B2 (en) * 2000-06-20 2003-09-09 Ina Walzlager Schaeffler Ohg Method of making a lever-type cam follower, and lever-type cam follower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048475A (en) * 1991-01-17 1991-09-17 Henley Manufacturing Holding Company, Inc. Rocker arm
US5535641A (en) * 1993-11-29 1996-07-16 Koyo Seiko Co., Ltd. Rocker arm formed by pressing
JPH11270312A (en) * 1998-03-25 1999-10-05 Nakanishi Metal Works Co Ltd Rocker arm and manufacture thereof
EP1122408A1 (en) * 1999-08-18 2001-08-08 Koyo Seiko Co., Ltd. Rocker arm and method of manufacturing rocker arm body
DE10030341A1 (en) * 2000-06-20 2002-01-03 Schaeffler Waelzlager Ohg Lever tappet producing process involves forming guide cheeks of valve shaft fitting by cold forging

Also Published As

Publication number Publication date
US20030196629A1 (en) 2003-10-23
EP1357257A2 (en) 2003-10-29
EP1357257B1 (en) 2010-05-05
US6729285B2 (en) 2004-05-04
DE50312684D1 (en) 2010-06-17

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