DE4123519C1 - Weight reduction for connecting rod with split big end bearing - provides recess(es) of specified depth and area for rated value attainment - Google Patents

Weight reduction for connecting rod with split big end bearing - provides recess(es) of specified depth and area for rated value attainment

Info

Publication number
DE4123519C1
DE4123519C1 DE19914123519 DE4123519A DE4123519C1 DE 4123519 C1 DE4123519 C1 DE 4123519C1 DE 19914123519 DE19914123519 DE 19914123519 DE 4123519 A DE4123519 A DE 4123519A DE 4123519 C1 DE4123519 C1 DE 4123519C1
Authority
DE
Germany
Prior art keywords
connecting rod
big end
bearing
end bearing
mass
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 - Fee Related
Application number
DE19914123519
Other languages
German (de)
Inventor
Albert Dipl.-Ing. 7132 Illingen De Pietsch
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.)
Daimler Benz AG
Original Assignee
Mercedes Benz AG
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 Mercedes Benz AG filed Critical Mercedes Benz AG
Priority to DE19914143320 priority Critical patent/DE4143320C2/en
Priority to DE19914123519 priority patent/DE4123519C1/en
Application granted granted Critical
Publication of DE4123519C1 publication Critical patent/DE4123519C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The mass reduction of a connecting rod (1) with a split big end bearing is attained by material removal on the big end bearing outside. A bearing cover has through bones for bolts secured in rod side bearing part. The reduction provides correction of deviation from a rated value. The reduced mass on the big end outer side is achieved by at least one recess (15), whose depth is so rated that the min. cross-section between the bolt bore (7) and the connecting rod inside (11) is equal to the min. cross-section between the bolt bore and the connecting rod outer dia. (12). The surface extent is such that the rod mass corrresponds to the rated value. ADVANTAGE - Improved adapting of big end bearing to the crank pin in the bearing region.

Description

Die Erfindung betrifft ein Verfahren zum Erzielen einer vorbe­ stimmten Masse für eine Pleuelstange gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a method for achieving a vorbe voted mass for a connecting rod according to the preamble of Claim 1.

Eine gattungsgemäße Ausführung ist aus der DE-OS 28 02 603 be­ kannt, wobei am Lagerdeckel seitlich Ausgleichsmassen ange­ bracht sind, die zum Erzielen der vorbestimmten Masse teilweise abgetragen werden.A generic version is from DE-OS 28 02 603 be knows, with compensating masses on the side of the bearing cap are brought to achieve the predetermined mass partially be removed.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Erzielen einer vorbestimmten Masse für eine Pleuelstange zu schaffen, mit dem eine bessere Schmiegung des Pleuelauges an den Hubzapfen im Bereich des pleuelschaftseitigen Lagerteils und des Lagerdeckels gewährleistet wird.The invention has for its object a method for Achieve a predetermined mass for a connecting rod create with which a better osculation of the connecting rod eye the crank pin in the area of the bearing part on the connecting rod side and the bearing cover is guaranteed.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des kenn­ zeichnenden Teiles des Hauptanspruches gelöst.The object is achieved by the features of the kenn drawing part of the main claim solved.

Das erfindungsgemäße Verfahren zum Massenausgleich bietet den Vorteil, daß keine zusätzlichen Massen, die den Verlauf der Querschnittsfläche des Lagerauges ungünstig beeinflussen, vor­ gesehen werden müssen. Außerdem wird durch die Form der Aus­ nehmung erreicht, daß die Beanspruchung der Pleuelstange am Mindestquerschnitt des Pleuelauges unter Last auf der Pleuel­ innenseite und Pleuelaußenseite gleich groß ist, wodurch ein Einknicken des Lagerauges verhindert und somit die Schmiegung an den Hubzapfen optimiert wird.The method according to the invention for mass balancing offers the Advantage that no additional masses, the course of the Adversely affect cross-sectional area of the bearing eye must be seen. In addition, the shape of the Aus Assumption achieved that the load on the connecting rod on Minimum cross-section of the connecting rod eye under load on the connecting rod inside and connecting rod outside is the same size, creating a  Buckling of the bearing eye prevents and thus the osculation on the crank pin is optimized.

Eine Prinzipdarstellung der Erfindung ist anhand der Zeichnung, die eine Pleuelstange mit Massenausgleich mittels Ausnehmungen teilweisem Schnitt zeigt, beschrieben.A schematic representation of the invention is based on the drawing, the one connecting rod with mass balance by means of recesses shows partial section described.

Die Fig. 1 zeigt eine Pleuelstange 1 für eine nicht darge­ stellte Hubkolbenmaschine, insbesondere Brennkraftmaschine, mit einem geteilten Pleuelauge 2. Eine den Hubzapfen einer nicht gezeigten Kurbelwelle der Hubkolben-Brennkraftmaschine um­ schließende Aufnahmeöffnung 3 im Pleuelauge 2 wird gebildet aus einem mit dem Pleuelschaft 4 verbundenen Lagerteil 5 und einem Lagerdeckel 6. Der Lagerdeckel 6 wird über Durchgangsbohrungen 7 mittels Pleuelschrauben 8 und Muttern 9 mit dem pleuel­ schaftseitigen Lagerteil 5 verbunden. Weiter weisen die Durch­ gangsbohrungen 7 Paßbohrungsabschnitte 10 zur Zentrierung des pleuelschaftseitigen Lagerteils 5 und des Lagerdeckels 6 auf. Fig. 1 shows a connecting rod 1 for a not shown Darge piston engine, in particular internal combustion engine, with a split connecting rod eye 2nd A crank pin of a crankshaft, not shown, of the reciprocating piston internal combustion engine about the receiving opening 3 closing in the connecting rod eye 2 is formed from a bearing part 5 connected to the connecting rod shaft 4 and a bearing cover 6 . The bearing cap 6 is connected via through holes 7 by means of connecting rod screws 8 and nuts 9 to the bearing part 5 on the connecting rod side. Furthermore, the through holes 7 fitting bore sections 10 for centering the connecting rod side bearing part 5 and the bearing cover 6 .

An den Pleuelaugenaußenseiten 12 der Pleuelstange 1 sind zwei Ausnehmungen 15 in Höhe des kleinsten Querschnitts zwischen Pleuelaugeninnenseite 11 und Durchgangsbohrung 7 angeordnet, wobei die Tiefe der Ausnehmungen 15 so dimensioniert ist, daß der Mindestquerschnitt zwischen Pleuelaugeninnenseite 11 und Durchgangsbohrung 7 und zwischen Durchgangsbohrung 7 und Pleu­ elaugenaußenseite 12 gleich groß ist. Falls die Durchgangsboh­ rung 7 parallel zur Pleuelstangenhochachse 13 verläuft, liegt der Mindestquerschnitt in Höhe der Trennebene 14 zwischen La­ gerteil 5 und Lagerdeckel 6.On the outside of the connecting rod eye 12 of the connecting rod 1 , two recesses 15 are arranged at the height of the smallest cross-section between the inside of the connecting rod eye 11 and the through hole 7 , the depth of the recesses 15 being dimensioned such that the minimum cross section between the inside of the connecting rod eye 11 and the through hole 7 and between the through hole 7 and the connecting rod side 12 is the same size. If the Durchgangssboh tion 7 runs parallel to the connecting rod vertical axis 13 , the minimum cross-section is at the level of the parting plane 14 between La gerteil 5 and bearing cover 6th

Der Massenausgleich kann über nur eine oder auch mehrere Ausnehmungen 15 erzielt werden. Dabei muß aber gewährleistet sein, daß im unbearbeiteten Zustand der Pleuelstange 1 der Mindestquerschnitt zwischen Pleuelaugenaußenseite 12 und Durchgangsbohrung 7 größer oder gleich dem Mindestquerschnitt zwischen Durchgangsbohrung 7 und Pleuelaugeninnenseite 11 ist, da nur so durch das Anbringen der Ausnehmung 15 gleiche Min­ destquerschnitte auf der Pleuelaugeninnenseite 11 und Pleuel­ augenaußenseite 12 erreicht werden können. Dazu wird die Ausnehmung 15 an der dem Mindestquerschnitt zwischen Pleuelau­ geninnenseite 11 und Durchgangsbohrung 7 gegenüberliegenden Stelle der Pleuelaugenaußenseite 12 angebracht. Während die Tiefe der Ausnehmung 15 durch den vorgegebenen Mindestquer­ schnitt festgelegt ist, wird der Massenausgleich über die flä­ chenhafte Ausdehnung der Ausnehmung 15 in einer beliebigen Richtung erreicht.The mass balance can be achieved via only one or more recesses 15 . It must be ensured, however, that when the connecting rod 1 is not machined, the minimum cross section between the connecting rod outer side 12 and the through bore 7 is greater than or equal to the minimum cross section between the through bore 7 and the connecting rod inner side 11 , since the same minimum cross sections on the inner side of the connecting rod 11 can only be achieved by making the recess 15 and connecting rods outside the eye 12 can be reached. For this purpose, the recess 15 is made at the point on the outside of the connecting rod eye 12 opposite the minimum cross section between the connecting rod inner side 11 and the through bore 7 . While the depth of the recess 15 is determined by the predetermined minimum cross section, the mass balance is achieved over the surface area of the recess 15 in any direction.

Claims (1)

Verfahren zum Erzielen einer vorbestimmten Masse für eine Pleuelstange mit geteiltem großen Pleuelauge, bei dem ein La­ gerdeckel mittels in Durchgangsbohrungen eines pleuelschaft­ seitigen Lagerteils und des Lagerdeckels eingesetzter Schrauben an dem pleuelschaftseitigen Lagerteil befestigt ist, wobei zur Korrektur von Abweichungen der Pleuelmasse von einem Sollwert an der Außenseite des großen Pleuelauges ein Materialabtrag vorgenommen wird, dadurch gekennzeichnet, daß zum Materialabtrag wenigstens eine Ausnehmung (15) ange­ bracht wird, deren Tiefe derart bemessen ist, daß der Mindest­ querschnitt zwischen der der Ausnehmung (15) benachbarten Durchgangsbohrung (7) und der Pleuelaugeninnenseite (11) gleich dem Mindestquerschnitt zwischen dieser Durchgangsbohrung (7) und der Pleuelaugenaußenseite (12) ist, und deren Flächenaus­ dehnung so groß vorgesehen wird, daß die Masse der Pleuelstange (1) dem Sollwert entspricht.Method for obtaining a predetermined mass for a connecting rod with a divided large connecting rod eye, in which a bearing cap is fastened to the connecting rod side bearing part by means of screws inserted into through bores of a connecting rod shaft-side bearing part and the bearing cap, correcting deviations of the connecting rod mass from a desired value on the Material removal is carried out on the outside of the large connecting rod eye, characterized in that at least one recess ( 15 ) is introduced for material removal, the depth of which is dimensioned such that the minimum cross section between the through hole ( 7 ) adjacent to the recess ( 15 ) and the inside of the connecting rod eye ( 11 ) is equal to the minimum cross-section between this through hole ( 7 ) and the connecting rod outer side ( 12 ), and the area extension is provided so large that the mass of the connecting rod ( 1 ) corresponds to the target value.
DE19914123519 1991-07-16 1991-07-16 Weight reduction for connecting rod with split big end bearing - provides recess(es) of specified depth and area for rated value attainment Expired - Fee Related DE4123519C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19914143320 DE4143320C2 (en) 1991-07-16 1991-07-16 Method for obtaining a predetermined mass for a connecting rod
DE19914123519 DE4123519C1 (en) 1991-07-16 1991-07-16 Weight reduction for connecting rod with split big end bearing - provides recess(es) of specified depth and area for rated value attainment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914123519 DE4123519C1 (en) 1991-07-16 1991-07-16 Weight reduction for connecting rod with split big end bearing - provides recess(es) of specified depth and area for rated value attainment

Publications (1)

Publication Number Publication Date
DE4123519C1 true DE4123519C1 (en) 1992-09-17

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Country Link
DE (1) DE4123519C1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023773A1 (en) * 2000-05-15 2002-01-31 Volkswagen Ag Lightweight connecting rod for IC engine has a mass reducing groove around the outer edge and with a web shaped structure
EP1531277A1 (en) * 2003-11-13 2005-05-18 Bayerische Motoren Werke Aktiengesellschaft Connecting rod bosses
FR2872872A1 (en) * 2004-07-09 2006-01-13 Renault Sas Connecting rod for internal combustion engine, has notches in concave side of lower head and in lateral sides of body for alleviating mechanical stresses exerted in determined annular zone and in connection zones defined by lateral sides
WO2014064522A1 (en) * 2012-10-22 2014-05-01 Toyota Jidosha Kabushiki Kaisha Connecting rod
CN104121324A (en) * 2014-08-12 2014-10-29 广西玉柴机器股份有限公司 Balance weight device for crank shaft dynamic balance test

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831430A (en) * 1927-11-03 1931-11-10 Weis Richard Bearing
US2371614A (en) * 1942-12-31 1945-03-20 Packard Motor Car Co Engine connecting rod and method of securing parts together
GB693427A (en) * 1949-04-22 1953-07-01 Doxford William & Sons Ltd Improvements in or relating to internal combustion engines
US3682018A (en) * 1969-12-11 1972-08-08 Porsche Kg Connecting rod, especially forked connecting rod for internal combustion engines
DE2637158A1 (en) * 1976-08-18 1978-02-23 Kloeckner Humboldt Deutz Ag Piston engine crankshaft bearing cap - has two location lugs for clamping to connecting rod
DE2802603A1 (en) * 1978-01-21 1979-07-26 Daimler Benz Ag DIVIDED CONNECTING ROD END

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831430A (en) * 1927-11-03 1931-11-10 Weis Richard Bearing
US2371614A (en) * 1942-12-31 1945-03-20 Packard Motor Car Co Engine connecting rod and method of securing parts together
GB693427A (en) * 1949-04-22 1953-07-01 Doxford William & Sons Ltd Improvements in or relating to internal combustion engines
US3682018A (en) * 1969-12-11 1972-08-08 Porsche Kg Connecting rod, especially forked connecting rod for internal combustion engines
DE2637158A1 (en) * 1976-08-18 1978-02-23 Kloeckner Humboldt Deutz Ag Piston engine crankshaft bearing cap - has two location lugs for clamping to connecting rod
DE2802603A1 (en) * 1978-01-21 1979-07-26 Daimler Benz Ag DIVIDED CONNECTING ROD END

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023773A1 (en) * 2000-05-15 2002-01-31 Volkswagen Ag Lightweight connecting rod for IC engine has a mass reducing groove around the outer edge and with a web shaped structure
EP1531277A1 (en) * 2003-11-13 2005-05-18 Bayerische Motoren Werke Aktiengesellschaft Connecting rod bosses
DE10353503A1 (en) * 2003-11-13 2005-06-23 Bayerische Motoren Werke Ag Tarable connecting rod
FR2872872A1 (en) * 2004-07-09 2006-01-13 Renault Sas Connecting rod for internal combustion engine, has notches in concave side of lower head and in lateral sides of body for alleviating mechanical stresses exerted in determined annular zone and in connection zones defined by lateral sides
WO2014064522A1 (en) * 2012-10-22 2014-05-01 Toyota Jidosha Kabushiki Kaisha Connecting rod
CN104121324A (en) * 2014-08-12 2014-10-29 广西玉柴机器股份有限公司 Balance weight device for crank shaft dynamic balance test

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