EP0681093B1 - Rocker arm - Google Patents
Rocker arm Download PDFInfo
- Publication number
- EP0681093B1 EP0681093B1 EP95106482A EP95106482A EP0681093B1 EP 0681093 B1 EP0681093 B1 EP 0681093B1 EP 95106482 A EP95106482 A EP 95106482A EP 95106482 A EP95106482 A EP 95106482A EP 0681093 B1 EP0681093 B1 EP 0681093B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- rocker
- receiving means
- region
- arm
- 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.)
- Expired - Lifetime
Links
- 238000005266 casting Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910001018 Cast iron Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910001349 ledeburite Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims 2
- 235000019362 perlite Nutrition 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000968 Chilled casting Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- F01L1/181—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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem and rocker arm
-
- 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
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20582—Levers
-
- 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
- Y10T74/20—Control lever and linkage systems
- Y10T74/20576—Elements
- Y10T74/20882—Rocker arms
Definitions
- the invention relates to a rocker arm according to the preamble of claim 1.
- Rocker arms of conventional design are manufactured using the croning process and subjected to a special heat treatment to achieve a hard cam run-off surface.
- a holder for a hydraulic valve lash adjuster is subsequently inserted into the rocker arm through a hole.
- the object of the invention is to provide a rocker arm which can be produced in a simple manner by casting in the croning process without expensive post-processing.
- the rocker arm manufactured in the croning casting process and consisting of a higher strength cast iron has a much greater hardness in the area of its cam run-off surface than in the area of a receptacle for a hydraulic valve lash compensation element, in the area of the rocker arm axle bearing and the oil supply hole.
- the high-strength cast iron consists of a chilled cast iron in the area of the cam run-off surface and of a nodular cast iron in the area of the rocker arm axis until the valve clearance compensation element is received.
- the structure of the rocker arm consists of ledeburite and little spheroidal graphite in the area of the cam outlet surface and is relatively hard.
- the area around the rocker arm axis up to the mount consists of a structure of pearlite, ferrite and nodular graphite and the material is therefore softer than the cam surface.
- This soft area of the rocker arm is absolutely necessary, on the one hand to drill out the receptacle without great effort and on the other hand one Drill the lubricating oil hole from the rocker arm axis to the seat in a simple manner.
- the receptacle has a relatively thin wall and is co-produced during casting by a core insert, so that the subsequent processing is inexpensive and is considerably simplified.
- the area around the receptacle of the rocker arm has a pearlite-ferrite-nodular graphite structure, which, despite the relatively thin wall of the receptacle, results in a wall thickness which can correspond to approximately one third of the radius of the receptacle bore in the rocker arm, which is favorable in terms of weight.
- the different degrees of hardness of the rocker arm from the cam run-off surface - starting from one free end - to receiving at the other free end of the rocker arm are achieved by the casting process.
- the hard area of the rocker arm in the cam run-off surface, which is produced in hard chilled casting, is achieved during the casting process by means of a cooling iron opposite this surface, as a result of which this rocker arm area solidifies more quickly than in the wider area around the axis and around the receptacle of the rocker arm.
- the rocker arm 1 consists essentially of a high-strength cast iron such as GGG 60 and GGG 70 and is preferably cast using the croning process.
- This Cast iron is composed of the alloy elements listed below, with slight deviations upwards and downwards.
- the rocker arm 1 Starting from its axis 2, the rocker arm 1 comprises a lever 3 and 4 on each side, the lever 3 having a convex cam run-off surface 5 and the lever 4 comprising a receptacle 6 for a hydraulic valve lash compensation element, which is not shown in more detail.
- a rib 7 runs from the cam run-off surface 5 to the receptacle 6 on the top of the rocker arm 1.
- the rocker arm 1 consists in area A of the cam run-off surface from a chilled cast iron and in area B of the rocker arm axis 2 and in area C of the receptacle 6 from a spheroidal cast iron.
- cam run-off surface 5 is made harder than other areas B and C around rocker arm axis 2 and around receptacle 6.
- the structures of these areas are shown in FIGS. 5 and 6.
- the white solidified structure (FIG. 4) of the rocker arm 1 in area A of the cam run-off surface 5 consists of ledeburite and little spheroidal graphite.
- the adjoining area B (FIG. 5) around the rocker arm axis 2 and the area C (FIG. 6) around the receptacle 6 has a gray solidified structure of pearlite, ferrite and spheroidal graphite, whereby the area C may have little lamellar graphite.
- the structures in areas B and C can show traces of Ledeburit. Between area A of rocker arm 1 and area B there is a transition zone with pearlite, ferrite, nodular graphite and an increased share of leather buritite.
- the receptacle 6 in the lever 4 of the rocker arm 1 is also introduced during the casting process by using a core insert 12.
- a relatively thin wall 10 of the receptacle 6 can be achieved, which is softer than the area A of the cam run-off surface 5 due to the solidification after casting with the formation of a pearlite-ferrite-spheroidal graphite structure.
- the less hard areas B and C enable the rocker arm 1 to be machined after casting.
- the receptacle 6 is drilled to size and the oil channel 13 is introduced, and the rocker arm axle bearing is made to measure.
- the receptacle 6 is designed by means of the core insert 12 used so that there is a defined wall of small thickness. This is advantageous for the subsequent processing with regard to the drilling effort. It was also achieved that, due to the alloy composition of the high-strength cast iron, no hard casting material is produced in the small wall thickness.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Die Erfindung bezieht sich auf einen Kipphebel nach dem Oberbegriff des Anspruchs 1.The invention relates to a rocker arm according to the preamble of
Kipphebel üblicher Bauart werden im Croning-Verfahren hergestellt und zur Erzielung einer harten Nockenablauffläche einer speziellen Wärmebehandlung unterzogen. Eine Aufnahme für ein hydraulisches Ventilspiel-Ausgleichselement wird im nachhinein in den Kipphebel durch eine Bohrung eingebracht.Rocker arms of conventional design are manufactured using the croning process and subjected to a special heat treatment to achieve a hard cam run-off surface. A holder for a hydraulic valve lash adjuster is subsequently inserted into the rocker arm through a hole.
Aufgabe der Erfindung ist es, einen Kipphebel zu schaffen, der in einfacher Weise durch Gießen im Croning-Verfahren ohne aufwendige Nachbearbeitung herstellbar ist.The object of the invention is to provide a rocker arm which can be produced in a simple manner by casting in the croning process without expensive post-processing.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Weitere vorteilhafte Merkmale beinhalten die Unteransprüche.This object is achieved according to the invention by the characterizing features of
Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß der im Croning-Gußverfahren hergestellte und aus einem höherfesten Gußeisen bestehende Kipphebel im Bereich seiner Nockenablauffläche eine wesentlich größere Härte aufweist als im Bereich einer Aufnahme für ein hydraulisches Ventilspiel-Ausgleichselement, im Bereich der Kipphebelachslagerung und der Ölversorgungsbohrung. Das höherfeste Gußeisen besteht nach dem Gießen aus einem Schalenhartguß im Bereich der Nockenablauffläche und aus einem Sphäroguß im Bereich der Kipphebelachse bis zur Aufnahme des Ventilspiel-Ausgleichselements. Das Gefüge des Kipphebels besteht im Bereich der Nockenablauffläche aus Ledeburit und wenig Kugelgraphit und ist relativ hart. Hierdurch entfällt eine zusätzliche Nachbehandlung oder das Einsetzen einer gehärteten Platte. Der Bereich um die Kipphebelachse bis zur Aufnahme besteht aus einem Gefüge von Perlit, Ferrit und Kugelgraphit und der Werkstoff ist somit weicher als die Nockenablauffläche.The main advantages achieved with the invention are that the rocker arm manufactured in the croning casting process and consisting of a higher strength cast iron has a much greater hardness in the area of its cam run-off surface than in the area of a receptacle for a hydraulic valve lash compensation element, in the area of the rocker arm axle bearing and the oil supply hole. After casting, the high-strength cast iron consists of a chilled cast iron in the area of the cam run-off surface and of a nodular cast iron in the area of the rocker arm axis until the valve clearance compensation element is received. The structure of the rocker arm consists of ledeburite and little spheroidal graphite in the area of the cam outlet surface and is relatively hard. This eliminates the need for additional post-treatment or the insertion of a hardened plate. The area around the rocker arm axis up to the mount consists of a structure of pearlite, ferrite and nodular graphite and the material is therefore softer than the cam surface.
Dieser weiche Bereich des Kipphebels ist unbedingt erforderlich, um zum einen ohne großen Arbeitsaufwand die Aufnahme maßgenau aufzubohren und zum anderen eine Schmierölbohrung von der Kipphebelachse bis zur Aufnahme in einfacher Weise zu bohren.This soft area of the rocker arm is absolutely necessary, on the one hand to drill out the receptacle without great effort and on the other hand one Drill the lubricating oil hole from the rocker arm axis to the seat in a simple manner.
Die Aufnahme weist eine relativ dünne Wandung auf und wird beim Gießen durch einen Kerneinsatz miterzeugt, so daß die nachfolgende Bearbeitung kostengünstig ist und wesentlich vereinfacht wird.The receptacle has a relatively thin wall and is co-produced during casting by a core insert, so that the subsequent processing is inexpensive and is considerably simplified.
Der Bereich um die Aufnahme des Kipphebels weist ein Perlit-Ferrit-Kugelgraphit-Gefüge auf, wodurch sich trotz relativ dünner Wandung der Aufnahme eine Wanddicke ergibt, die etwa einem Drittel des Radius der Aufnahmebohrung im Kipphebel entsprechen kann, was gewichtsmäßig günstig ist.The area around the receptacle of the rocker arm has a pearlite-ferrite-nodular graphite structure, which, despite the relatively thin wall of the receptacle, results in a wall thickness which can correspond to approximately one third of the radius of the receptacle bore in the rocker arm, which is favorable in terms of weight.
Die unterschiedlichen Härtegrade des Kipphebels von der Nockenablauffläche - von einem freien Ende ausgehend - bis zur Aufnahme am anderen freien Ende des Kipphebels werden durch das Gußverfahren erzielt. Der in Schalenhartguß hergestellte harte Bereich des Kipphebels in der Nockenablauffläche wird mittels einem dieser Fläche gegenüberstehenden Kühleisen während des Gießvorganges erzielt, wodurch eine schnellere Erstarrung dieses Kipphebel-Bereiches erfolgt als im weiteren Bereich um die Achse und um die Aufnahme des Kipphebels herum.The different degrees of hardness of the rocker arm from the cam run-off surface - starting from one free end - to receiving at the other free end of the rocker arm are achieved by the casting process. The hard area of the rocker arm in the cam run-off surface, which is produced in hard chilled casting, is achieved during the casting process by means of a cooling iron opposite this surface, as a result of which this rocker arm area solidifies more quickly than in the wider area around the axis and around the receptacle of the rocker arm.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.
Es zeigen
- Fig. 1 eine Draufsicht auf einen Kipphebel,
- Fig. 2 einen Kipphebel im Schnitt nach der Linie II-II der Fig. 1,
- Fig. 3 einen Schnitt nach der Linie III-III der Fig. 1,
- Fig. 4 ein Gefügebild vom Bereich der Nockenablauffläche,
- Fig. 5 ein Gefügebild vom Bereich zwischen Aufnahme und Kipphebelachse, und
- Fig. 6 ein Gefügebild vom Bereich der Aufnahme.
Show it
- 1 is a plan view of a rocker arm,
- 2 shows a rocker arm in section along the line II-II of FIG. 1,
- 3 shows a section along the line III-III of FIG. 1,
- 4 shows a micrograph of the area of the cam run-off surface,
- Fig. 5 is a micrograph of the area between the receptacle and rocker arm axis, and
- Fig. 6 is a micrograph of the area of the recording.
Der Kipphebel 1 besteht im wesentlichen aus einem höherfesten Gußeisen wie z.B. GGG 60 und GGG 70 und wird vorzugsweise im Croning-Verfahren gegossen. Dieses Gußeisen setzt sich aus nachfolgend aufgeführten Legierungs-Elementen zusammen, wobei geringfügige Abweichungen nach oben und unten vorhanden sind. Das verwendete höherfeste Gußeisen weist eine chemische Zusammensetzung in % mit den Legierungselementen C 3,5 bis 4,0, Si 1,7 bis 2,8, Mn < = 0,6, P < = 0,1 S, < = 0,01 Mg, 0,03 bis 0,06, Ni < = 1,5, Cu < = 1,5, Chrom < = 0,3, Mo < = 0,5 auf.The
Der Kipphebel 1 umfasst von seiner Achse 2 ausgehend zu jeder Seite einen Hebel 3 und 4, wobei der Hebel 3 eine konvexe Nockenablauffläche 5 aufweist und der Hebel 4 eine Aufnahme 6 für ein hydraulisches Ventilspiel-Ausgleichselement, welches nicht näher dargestellt ist, umfasst. Von der Nockenablauffläche 5 bis zur Aufnahme 6 verläuft an der Oberseite des Kipphebels 1 eine Rippe 7.Starting from its
Der Kipphebel 1 besteht im Bereich A der Nockenablauffläche aus einem Schalenhartguß und im Bereich B der Kipphebelachse 2 und im Bereich C der Aufnahme 6 aus einem Sphäroguß.The
Durch die Zuordnung eines Kühleisens 11 vor der Nockenablauffläche 5 wird eine optimale Erstarrung dieser Fläche und somit ein Schalenhartguß mit einem besonderen Gefüge erzielt, das in Fig. 4 näher dargestellt ist.By assigning a
Hierdurch wird der Bereich A der Nockenablauffläche 5 härter ausgestaltet als die weiteren Bereiche B und C um die Kipphebelachse 2 und um die Aufnahme 6. Die Gefüge dieser Bereiche sind in den Fig. 5 und 6 gezeigt.As a result, area A of cam run-off
Das weiß erstarrte Gefüge (Fig. 4) des Kipphebels 1 im Bereich A der Nockenablauffläche 5 besteht aus Ledeburit und wenig Kugelgraphit. Der anschließende Bereich B (Fig.5) um die Kipphebelachse 2 und der Bereich C (Fig. 6) um die Aufnahme 6 weist ein grau erstarrtes Gefüge aus Perlit, Ferrit und Kugelgraphit auf, wobei der Bereich C wenig lamellaren Graphit besitzen kann. Die Gefüge in den Bereichen B und C können Spuren von Ledeburit aufweisen. Zwischen Bereich A des Kipphebels 1 und Bereich B befindet sich eine Übergangszone mit Perlit, Ferrit, Kugelgraphit und einem erhöhten Ledeburitanteil.The white solidified structure (FIG. 4) of the
Die Aufnahme 6 im Hebel 4 des Kipphebels 1 wird beim Gießvorgang mit eingebracht, indem ein Kerneinsatz 12 eingesetzt wird. Es kann hierdurch und aufgrund des höherfesten Gußwerkstoffes eine relativ dünne Wandung 10 der Aufnahme 6 erzielt werden, die aufgrund der Erstarrung nach dem Gießen unter Bildung von einem Perlit-Ferrit-Kugelgraphit-Gefüge weicher ist als der Bereich A der Nockenablauffläche 5.The
Die weniger harten Bereiche B und C ermöglichen eine nach dem Gießen erforderliche Bearbeitung des Kipphebels 1. Es wird die Aufnahme 6 auf Maß gebohrt und der Ölkanal 13 eingebracht sowie die Kipphebelachslagerung auf Maß gebracht.The less hard areas B and C enable the
Die Aufnahme 6 ist mittels des eingesetzten Kerneinsatzes 12 so ausgestaltet, daß sich eine definierte Wandung geringer Dicke ergibt. Dies ist für die nachfolgende Bearbeitung hinsichtlich des Bohraufwandes vorteilig. Auch wurde erreicht, daß in der geringen Wandstärke aufgrund der Legierungszusammensetzung des höherfesten Gußeisens kein harter Gußwerkstoff entsteht.The
Claims (5)
- A rocker arm (1) for a valve drive of an internal-combustion engine with a run-down face (5) for a cam support and a receiving means (6) for an hydraulic valve-clearance compensating member and a rocker-arm shaft (2) arranged therebetween, characterized in that the rocker arm (1) consists of a higher-strength cast iron in clear chill casting in region (A) of the cam run-down face (5), which has a greater hardness than the regions (B and C) - comprising spheroidal graphite iron - of the rocker-arm shaft (2) and the cylindrical receiving means (6) jointly cast in the rocker arm (1), wherein a core insert (12) is used for forming the said cylindrical receiving means (6) and has a diameter such that a relatively thin wall (10) of a perlite/ferrite/spheroidal graphite structure is formed and a lubricating-oil bore (13) in the rocker arm (1) extends from the receiving means (6) to the rocker-arm shaft (2), it being possible for the lubricating-oil bore (13) to be formed in the softer structure of the rocker arm (1) consisting of spheroidal graphite.
- A rocker arm according to Claim 1, characterized in that the structure of the rocker arm (1) consists of ledeburite and a little spheroidal graphite in region (A) of the cam run-down face (5) and of a structure of a perlite, ferrite and spheroidal graphite in region (B) of the rocker-arm shaft (2) and in region (C) of the receiving means (6).
- A rocker arm according to Claim 1 or 2, characterized in that the structures of the rocker-arm shaft (2) and of the receiving means (6) can have traces of ledeburite, wherein a transition zone between region (A) and region (B) of the rocker-arm (1) has an increased proportion of ledeburite.
- A rocker arm according to Claim 1 or one of the preceding Claims, characterized in that the rocker arm (1) comprises the three hardness regions (A, B and C) of the cast material merging into one another, wherein in region (A) of the cam run-down face (5) the material hardness is greatest and can be produced in the casting process by means of an iron chill (11) directly opposite the cam run-down face (5), and the wall of the face (5) has a thickness [corresponding] substantially to the thickness of a rib (7) spanning the rocker arm (1).
- A rocker arm according to Claim 1 or one of the preceding Claims, characterized in that the thickness of of the wall (10) of the receiving means (6) corresponds [to] substantially a third of the radius of the cylindrical receiving means (6) of the rocker arm (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4415608A DE4415608A1 (en) | 1994-05-04 | 1994-05-04 | rocker arm |
| DE4415608 | 1994-05-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0681093A1 EP0681093A1 (en) | 1995-11-08 |
| EP0681093B1 true EP0681093B1 (en) | 1997-09-10 |
Family
ID=6517196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95106482A Expired - Lifetime EP0681093B1 (en) | 1994-05-04 | 1995-04-28 | Rocker arm |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5582142A (en) |
| EP (1) | EP0681093B1 (en) |
| JP (1) | JPH0842314A (en) |
| KR (1) | KR950032982A (en) |
| DE (2) | DE4415608A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100368631B1 (en) * | 1995-11-23 | 2003-04-10 | 아이엔에이 뵐즈라거 쉐플러 오하게 | Driving lever or rocker arm made by non-cutting shaping |
| US6293238B1 (en) | 1999-04-07 | 2001-09-25 | Caterpillar Inc. | Rocker arm and rocker arm assembly for engines |
| DE102004052998A1 (en) * | 2004-11-03 | 2006-05-04 | Deutz Ag | Tilting or pulling lever with ball pressure piece for controlling valves has stepped or blind boring with support surface |
| DE102005046061A1 (en) * | 2005-09-27 | 2007-03-29 | Schaeffler Kg | Lever e.g. primary lever, for rocker arm device, has carrier part formed as sheet metal molded part from material such as case hardening steel, and sliding surface parts formed as hard metal plates |
| DE102011002200B4 (en) * | 2011-04-20 | 2015-02-12 | Neue Halberg-Guss Gmbh | Method for reducing weight or increasing the mechanical strength of components made of cast iron materials |
| CN114570889B (en) * | 2022-02-24 | 2024-05-03 | 天地上海采掘装备科技有限公司 | Casting technology of rocker arm shell of super-thick coal seam coal mining machine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4153017A (en) * | 1977-05-16 | 1979-05-08 | Stanadyne, Inc. | Alloyed chilled iron |
| JPS54130427A (en) * | 1978-03-31 | 1979-10-09 | Toyota Motor Corp | Manufacture of rocker arm |
| JPS6047806A (en) * | 1983-08-24 | 1985-03-15 | Aisin Seiki Co Ltd | Hydraulic lifter for internal-combustion engine |
| JPH029046Y2 (en) * | 1984-08-29 | 1990-03-06 | ||
| US4628874A (en) * | 1985-10-30 | 1986-12-16 | Eaton Corporation | Roller follower axle retention |
| JPS63303030A (en) * | 1987-05-30 | 1988-12-09 | Nippon Piston Ring Co Ltd | Locker arm |
| US5195473A (en) * | 1989-09-08 | 1993-03-23 | Nissan Motor Company, Ltd. | Rocker arm and method of casting |
| US5163391A (en) * | 1990-08-17 | 1992-11-17 | Hitchiner Manufacturing Co., Inc. | Wear resistant cast iron rocker arm and method of making same |
| US5251585A (en) * | 1992-02-12 | 1993-10-12 | Erich Neumayer Gmbh & Co. K.G. | Two-armed lever |
-
1994
- 1994-05-04 DE DE4415608A patent/DE4415608A1/en not_active Withdrawn
-
1995
- 1995-04-27 US US08/429,855 patent/US5582142A/en not_active Expired - Fee Related
- 1995-04-28 DE DE59500624T patent/DE59500624D1/en not_active Expired - Fee Related
- 1995-04-28 EP EP95106482A patent/EP0681093B1/en not_active Expired - Lifetime
- 1995-05-02 JP JP7108884A patent/JPH0842314A/en not_active Withdrawn
- 1995-05-03 KR KR1019950010810A patent/KR950032982A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0842314A (en) | 1996-02-13 |
| EP0681093A1 (en) | 1995-11-08 |
| DE59500624D1 (en) | 1997-10-16 |
| US5582142A (en) | 1996-12-10 |
| KR950032982A (en) | 1995-12-22 |
| DE4415608A1 (en) | 1995-11-09 |
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