DE1078819B - Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines - Google Patents

Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines

Info

Publication number
DE1078819B
DE1078819B DED27943A DED0027943A DE1078819B DE 1078819 B DE1078819 B DE 1078819B DE D27943 A DED27943 A DE D27943A DE D0027943 A DED0027943 A DE D0027943A DE 1078819 B DE1078819 B DE 1078819B
Authority
DE
Germany
Prior art keywords
crankshaft
internal combustion
crank
combustion engines
forged
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.)
Pending
Application number
DED27943A
Other languages
German (de)
Inventor
Martin Fritz
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
Daimler 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 Daimler Benz AG filed Critical Daimler Benz AG
Priority to DED27943A priority Critical patent/DE1078819B/en
Publication of DE1078819B publication Critical patent/DE1078819B/en
Pending 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F16C3/08—Crankshafts made in one piece

Description

Geschmiedete Kurbelwelle, insbesondere mehrfach gekröpfte Kurbelwelle für Brennkraftmaschinen Es ist besonders bei Gußkurbelwellen von Brennkraftmaschinen bereits bekannt, den Kraftfluß an den kerbrissegefährdeten Übergangsstellen zwischen Wangen und Lagerzapfen in einem großen Bogen herumzuleiten, um dadurch den Kraftfluß gleichmäßiger zu gestalten. Man ordnete an diesen Übergangsstellen muldenartige Vertiefungen, sogenannte »Entlastungsnieren« an, deren Herstellung beim Gießen der Kurbelwellen durch eine entsprechende Formgebung der Gießmodelle keinerlei Schwierigkeiten bereitete, die aber bei geschmiedeten Kurbelwellen mühsam herausgefräst werden mußten. Diese Maßnahme verteuert die Herstellung der geschmiedeten Kurbelwellen ganz erheblich.Forged crankshaft, especially multi-cranked crankshaft for internal combustion engines It is especially useful for cast crankshafts of internal combustion engines already known, the flow of force at the transition points between Guide the cheeks and bearing journals around in a large arc, thereby reducing the flow of force to make it more even. Trough-like structures were arranged at these transition points Depressions, so-called »relief kidneys«, which are produced when the Crankshafts do not pose any difficulties due to the corresponding shaping of the casting models which, however, had to be laboriously milled out in the case of forged crankshafts. This measure makes the manufacture of the forged crankshafts considerably more expensive.

Die Erfindung schlägt demgegenüber vor, an Stelle der bisherigen Entlastungsnieren durchgehende, d. h. die Kurbelwangen quer zur jeweiligen Kröpfungsebene voll durchsetzende, gleichfalls durch Schmieden geschaffene Einbauchungen mit insbesondere gerader Achse und mit stetig gekrümmter Querschnittswand vorzusehen, welche die gleiche Wirkung haben wie die vorgenannten Entlastungsnieren. Man kommt also mit dem üblichen Schmiedevorgang ohne Mehrkosten aus und erhält eine noch bruchsichere Kurbelwelle wie durch das bisher übliche Fräsverfahren, weil durch den Schmiedevorgang kein Anschneiden der Metallstruktur erfolgt. Gegenüber dem Vorschlag, auch die nierenförmigen Entlastungsvertiefungen in die Kurbelwange einzuschmieden, bedeutet die Erfindung eine wesentliche Vereinfachung in der Fertigung, weil die Einbauchungen beim Schmieden der Welle im Gesenk mitgeschmiedet werden können, die nierenförmigen Vertiefungen jedoch nicht.In contrast, the invention proposes instead of the previous relief kidneys continuous, d. H. fully penetrating the crank webs transversely to the respective offset plane, also indentations created by forging, in particular with a straight axis and to provide with a continuously curved cross-sectional wall, which has the same effect like the aforementioned relief kidneys. So you come with the usual forging process without additional costs and get an even more break-proof crankshaft like that Previously common milling processes because the forging process does not cut the Metal structure is done. Compared to the proposal, also the kidney-shaped relief depressions Forging into the crank web, the invention means a significant simplification in production because the indentations are forged in the die when the shaft is forged but not the kidney-shaped depressions.

In der Zeichnung ist die Erfindung in einem Ausführungsbeispiel dargestellt. Die Abbildung zeigt eine Kröpfung eines mehrfach gekröpften Kurbelwellen-Schmiederohlings in Seitenansicht.In the drawing, the invention is shown in one embodiment. The illustration shows a crank of a crankshaft forged blank with multiple crankings in side view.

Die erfindungsgemäßen Einbauchungen sind mit a bezeichnet; sie weisen teilzylindrischen Querschnitt auf und sind im Kröpfungsbereich der Kurbelwellenwangen b, also in dem Teil der Wangen angeordnet, der jeweils zwei einander benachbarte Zapfen verbindet. Es weist also jede Wange an jeder Seite je eine Einbauchung a auf. Durch die Einbauchungen a werden die gefährdeten Übergänge gut ausgerundet, wodurch eine sanfte Umleitung des Kraftflusses eintritt. Die Erfindung eignet sich auch für andere Wellen z. B. mit Übergangsflanschen, für gekröpfte. Hebel usw.The indentations according to the invention are denoted by a; they wise partially cylindrical cross-section and are in the crank area of the crankshaft webs b, so arranged in the part of the cheeks, the two adjacent Cones connects. So each cheek has an indentation on each side a on. The endangered transitions are well rounded by the indentations a, whereby a gentle diversion of the power flow occurs. The invention is suitable also for other waves z. B. with transition flanges, for cranked. Levers etc.

Claims (3)

PATENTANSPRÜCHE: 1. Geschmiedete Kurbelwelle mit gut ausgerundeten Übergängen zwischen Lagerzapfen und Kurbelwangen, insbesondere mehrfach gekröpfte Kurbelwellen für Brennkraftmaschinen, gekennzeichnet durch die Kurbelwangen oder Kurbelarme quer zur jeweiligen Kröpfungsebene voll durchsetzende, gleichfalls durch Schmieden geschaffene Einbauchung (a) an den einzelnen Übergangsstellen zwischen Kurbelwangen bzw. Kurbelarmen und den Lagerzapfen. PATENT CLAIMS: 1. Forged crankshaft with well rounded Transitions between bearing journals and crank webs, especially cranked ones Crankshafts for internal combustion engines, characterized by the crank webs or Crank arms transversely to the respective cranking plane fully enforcing, also through Forging created indentation (a) at the individual transition points between Crank webs or crank arms and the bearing pin. 2. Kurbelwelle nach Anspruch 1, dadurch gekennzeichnet, daß die Einbauchungen (a) einen zylindrischen Teilquerschnitt haben. 2. crankshaft according to claim 1, characterized in that the indentations (a) have a partial cylindrical cross-section to have. 3. Kurbelwelle nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Kurbelwangen im Kröpfungsbereich an jeder Seite je eine Einbauchung (a) aufweisen. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 143 574.3. Crankshaft according to claims 1 and 2, characterized in that the The crank webs have an indentation (a) on each side in the offset area. Documents considered: German Patent No. 143 574.
DED27943A 1958-04-24 1958-04-24 Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines Pending DE1078819B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED27943A DE1078819B (en) 1958-04-24 1958-04-24 Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED27943A DE1078819B (en) 1958-04-24 1958-04-24 Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines

Publications (1)

Publication Number Publication Date
DE1078819B true DE1078819B (en) 1960-03-31

Family

ID=7039465

Family Applications (1)

Application Number Title Priority Date Filing Date
DED27943A Pending DE1078819B (en) 1958-04-24 1958-04-24 Forged crankshaft, especially crankshaft with multiple cranks for internal combustion engines

Country Status (1)

Country Link
DE (1) DE1078819B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525268B1 (en) * 1965-05-11 1970-11-12 Schmidt Gmbh Karl Crankshaft with relief depressions
DE3608810A1 (en) * 1986-03-15 1987-09-24 Porsche Ag CRANKSHAFT FOR LIFTING PISTON MACHINES
DE102004040565A1 (en) * 2004-08-21 2006-03-09 Daimlerchrysler Ag Crankshaft for e.g. V-engine, has recesses overlapping with base area, of side walls, adjacent to base and hub pivots in radial direction, where recesses are provided directly adjacent to load area of pivots

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE143574C (en) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE143574C (en) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1525268B1 (en) * 1965-05-11 1970-11-12 Schmidt Gmbh Karl Crankshaft with relief depressions
DE3608810A1 (en) * 1986-03-15 1987-09-24 Porsche Ag CRANKSHAFT FOR LIFTING PISTON MACHINES
US4867007A (en) * 1986-03-15 1989-09-19 Porsche Antiegesellschaft Crankshaft for reciprocating piston engine
DE102004040565A1 (en) * 2004-08-21 2006-03-09 Daimlerchrysler Ag Crankshaft for e.g. V-engine, has recesses overlapping with base area, of side walls, adjacent to base and hub pivots in radial direction, where recesses are provided directly adjacent to load area of pivots

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