DE102015204421A1 - Bearing pin for a cam follower for a valve train of an internal combustion engine and method for producing a bearing pin - Google Patents
Bearing pin for a cam follower for a valve train of an internal combustion engine and method for producing a bearing pin Download PDFInfo
- Publication number
- DE102015204421A1 DE102015204421A1 DE102015204421.1A DE102015204421A DE102015204421A1 DE 102015204421 A1 DE102015204421 A1 DE 102015204421A1 DE 102015204421 A DE102015204421 A DE 102015204421A DE 102015204421 A1 DE102015204421 A1 DE 102015204421A1
- Authority
- DE
- Germany
- Prior art keywords
- bearing pin
- region
- track
- axial ends
- hardness
- 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.)
- Ceased
Links
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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
- F01L1/14—Tappets; Push rods
-
- 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
-
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
-
- 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
-
- 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
- F01L2305/02—Mounting of rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/04—Hardness
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
- F16C2223/12—Hardening, e.g. carburizing, carbo-nitriding with carburizing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/18—Camshafts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Die Erfindung betrifft einen Lagerbolzen für einen Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine mit zumindest einer Laufbahn (1) zur Lagerung zumindest einer Nockenrolle (6), dadurch gekennzeichnet, dass die Laufbahn (1) zum Härten carbonitriert ist und der Lagerbolzen im Bereich seiner axialen Enden (2, 3) zum Verstemmen oder Vernieten eine geringere Härte als an der Laufbahn (1) aufweist. Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung eines Lagerbolzens.The invention relates to a bearing pin for a cam follower for a valve train of an internal combustion engine with at least one track (1) for supporting at least one cam roller (6), characterized in that the raceway (1) is carbonitriert for hardening and the bearing pin in the region of its axial ends (2, 3) for caulking or riveting a lower hardness than on the raceway (1). The invention further relates to a method for producing a bearing pin.
Description
Gebiet der ErfindungField of the invention
Die Erfindung betrifft einen Lagerbolzen für einen Nockenfolger für einen Ventiltrieb einer Brennkraftmaschine und ein Verfahren zur Herstellung eines Lagerbolzens gemäß der im Oberbegriff des Patentanspruchs 1 bzw. 3 näher definierten Art.The invention relates to a bearing pin for a cam follower for a valve train of an internal combustion engine and a method for producing a bearing pin according to the closer defined in the preamble of
Ein solcher Lagerbolzen ist beispielsweise in
Zusammenfassung der ErfindungSummary of the invention
Der Erfindung liegt daher die Aufgabe zugrunde, einen Lagerbolzen der vorgenannten Art mit erhöhter Verschleißfestigkeit und zugleich einfacher Herstellbarkeit und Montierbarkeit zu schaffen und ein Verfahren zur Herstellung eines solchen Lagerbolzens anzugeben. The invention is therefore based on the object to provide a bearing pin of the aforementioned type with increased wear resistance and at the same time easier to produce and assemble and specify a method for producing such a bearing pin.
Die Aufgabe wird durch die Merkmale des Patentanspruchs 1 und alternativ durch die Merkmale des Patentanspruchs 3 gelöst. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den jeweiligen Unteransprüchen, der Beschreibung und den Zeichnungen.The object is solved by the features of
Es wird ein Lagerbolzen für einen Nockenfolger mit zumindest einer Laufbahn zur Lagerung zumindest einer Nockenrolle vorgeschlagen, bei dem die Laufbahn zum Härten carbonitriert ist und der Lagerbolzen im Bereich seiner axialen Enden zum Verstemmen oder Vernieten eine geringere Härte als an der Laufbahn aufweist. Auf diese Weise wird ein Lagerbolzen mit an seiner Laufbahn einfach herstellbarer Verschleißfestigkeit erreicht, der zugleich an seinen Enden einfach verstemm- bzw. vernietbar ist.It is proposed a bearing pin for a cam follower with at least one track for supporting at least one cam roller in which the raceway is carbonitrided for hardening and the bearing pin in the region of its axial ends for caulking or riveting has a lower hardness than on the track. In this way, a bearing pin is achieved with easy on his career wear resistance, which is at the same time simply caulked or riveted at its ends.
Die Differenz zwischen der Oberflächenhärte der Laufbahn und der Härte der axialen Enden beträgt zumindest 60 HV (Härteskala nach Vickers).The difference between the surface hardness of the raceway and the hardness of the axial ends is at least 60 HV (Vickers hardness scale).
Die erfindungsgemäße Aufgabe wird auch durch ein Verfahren zur Herstellung eines Lagerbolzens für einen Nockenfolger mit zumindest einer Laufbahn zur Lagerung zumindest einer Nockenrolle gelöst. Erfindungsgemäß ist vorgesehen, dass der Lagerbolzen im Bereich seiner axialen Enden mit einem vorbestimmten Übermaß gegenüber dem Bereich der Laufbahn hergestellt und dann vollständig durchgehärtet wird. Dabei wird die Oberflächenrandschicht des Lagerbolzens mit gegenüber dem übrigen Materialquerschnitt größerer Härte hergestellt und dann nach dem Härten im Bereich der axialen Enden abgetragen. Auf diese Weise ist ein durchgehärteter Lagerbolzen mit einer verschleißfest gehärteten Laufbahn und im Bereich seiner axialen Enden geringerer Härte einfach und kostengünstig herstellbar.The object of the invention is also achieved by a method for producing a bearing pin for a cam follower with at least one raceway for supporting at least one cam roller. According to the invention, it is provided that the bearing pin is produced in the region of its axial ends with a predetermined interference with respect to the region of the raceway and then completely through-hardened. In this case, the surface layer of the surface of the bearing pin is made with respect to the other material cross-section of greater hardness and then removed after curing in the region of the axial ends. In this way, a through-hardened bearing pin with a wear-resistant hardened raceway and in the region of its axial ends lower hardness is easy and inexpensive to produce.
Eine Oberflächenrandschicht mit gegenüber dem übrigen Materialquerschnitt größerer Härte kann besonders einfach durch Carbonitrieren hergestellt werden.A surface edge layer with respect to the rest of the material cross section greater hardness can be particularly easily prepared by carbonitriding.
Es ist Vorteil, wenn der Lagerbolzen im Bereich seiner axialen Enden mit einem vorbestimmten Übermaß-Durchmesser gegenüber dem Bereich der Laufbahn abgesetzt wird, wobei dieser der Summe aus einem vorbestimmten Endmaß-Durchmesser und zumindest der zweifachen Tiefe der zu härtenden Oberflächenrandschicht entspricht. Hierdurch wird gewährleistet, dass der Lagerbolzen im Bereich seiner axialen Enden gegenüber der Laufbahn mit Übermaß abgesetzt wird, derart, dass die härtere Oberflächenrandschicht nach dem Härten an den axialen Enden vollständig abgetragen werden kann, während sie im Bereich der Laufbahn erhalten bleibt.It is advantageous if the bearing pin is offset in the region of its axial ends with a predetermined oversize diameter relative to the region of the raceway, which corresponds to the sum of a predetermined final gauge diameter and at least twice the depth of the surface edge layer to be cured. This ensures that the bearing pin is oversized in the region of its axial ends relative to the raceway, such that the harder surface layer of surface can be completely removed after hardening at the axial ends, while maintaining it in the region of the raceway.
Entsprechend kann der Lagerbolzen mit einer vorbestimmten axialen Übermaß-Länge hergestellt werden, wobei diese der Summe aus einer vorbestimmten Endmaß-Länge und zumindest der zweifachen Tiefe der herzustellenden Oberflächenrandschicht entspricht.Accordingly, the bearing pin can be produced with a predetermined axial interference length, which corresponds to the sum of a predetermined final dimension length and at least twice the depth of the surface layer to be produced surface.
Erfindungsgemäß findet der Lagerbolzen Verwendung in Nockenfolgern, wie zum Beispiel in Schwing- oder Schlepphebeln, Rollenstößeln, Kipphebeln und Pumpenstößeln, insbesondere für Kraftstoffpumpen.According to the invention, the bearing pin is used in cam followers, such as, for example, in oscillating or drag levers, roller tappets, rocker arms and pump tappets, in particular for fuel pumps.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Weitere Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung und aus den Zeichnungen, in denen ein Ausführungsbeispiel der Erfindung vereinfacht dargestellt ist. Es zeigen:Further features of the invention will become apparent from the following description and from the drawings, in which an embodiment of the invention is shown in simplified form. Show it:
Ausführliche Beschreibung der ZeichnungenDetailed description of the drawings
In
Die Herstellung eines erfindungsgemäßen Lagerbolzens ist exemplarisch in
In einem weiteren Arbeitsschritt wird in gehärtetem Zustand die carbonitrierte Oberflächenrandschicht im Bereich der axialen Enden
In
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Laufbahn career
- 22
- Ende The End
- 33
- Ende The End
- 44
- Linie line
- 55
- Linie line
- 66
- Nockenrolle cam roller
- LC L C
- Länge length
- LL
- Länge length
- DD
- Durchmesser diameter
- DÜ D Ü
- Durchmesser diameter
- LÜ L Ü
- Länge length
- SR S R
- Tiefe depth
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102006054406 A1 [0002] DE 102006054406 A1 [0002]
- DE 102009032143 A1 [0002] DE 102009032143 A1 [0002]
- EP 0221284 B1 [0002] EP 0221284 B1 [0002]
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015204421.1A DE102015204421A1 (en) | 2015-03-12 | 2015-03-12 | Bearing pin for a cam follower for a valve train of an internal combustion engine and method for producing a bearing pin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015204421.1A DE102015204421A1 (en) | 2015-03-12 | 2015-03-12 | Bearing pin for a cam follower for a valve train of an internal combustion engine and method for producing a bearing pin |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102015204421A1 true DE102015204421A1 (en) | 2016-04-21 |
Family
ID=55638175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102015204421.1A Ceased DE102015204421A1 (en) | 2015-03-12 | 2015-03-12 | Bearing pin for a cam follower for a valve train of an internal combustion engine and method for producing a bearing pin |
Country Status (1)
Country | Link |
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DE (1) | DE102015204421A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0221284B1 (en) | 1985-10-30 | 1990-05-09 | Eaton Corporation | Roller follower axle retention |
DE10238252A1 (en) * | 2001-08-22 | 2003-05-15 | Ntn Toyo Bearing Co Ltd | Cam follower with roller |
DE10315416A1 (en) * | 2002-06-27 | 2004-01-22 | Ina-Schaeffler Kg | Fixing the position of a bolt |
DE102006054406A1 (en) | 2006-11-18 | 2008-05-21 | Schaeffler Kg | Hubübertragungsbauteil and method for its preparation |
JP2009144206A (en) * | 2007-12-14 | 2009-07-02 | Ntn Corp | Rolling shaft |
DE102009032143A1 (en) | 2009-07-08 | 2011-01-13 | Schaeffler Technologies Gmbh & Co. Kg | Method for producing a stroke transmission component |
-
2015
- 2015-03-12 DE DE102015204421.1A patent/DE102015204421A1/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0221284B1 (en) | 1985-10-30 | 1990-05-09 | Eaton Corporation | Roller follower axle retention |
DE10238252A1 (en) * | 2001-08-22 | 2003-05-15 | Ntn Toyo Bearing Co Ltd | Cam follower with roller |
DE10315416A1 (en) * | 2002-06-27 | 2004-01-22 | Ina-Schaeffler Kg | Fixing the position of a bolt |
DE102006054406A1 (en) | 2006-11-18 | 2008-05-21 | Schaeffler Kg | Hubübertragungsbauteil and method for its preparation |
JP2009144206A (en) * | 2007-12-14 | 2009-07-02 | Ntn Corp | Rolling shaft |
DE102009032143A1 (en) | 2009-07-08 | 2011-01-13 | Schaeffler Technologies Gmbh & Co. Kg | Method for producing a stroke transmission component |
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