EP0255707B1 - Arrangement of an auxiliary apparatus by means of a bolt joint of a highly loaded machine part, especially at an internal-combustion engine - Google Patents

Arrangement of an auxiliary apparatus by means of a bolt joint of a highly loaded machine part, especially at an internal-combustion engine Download PDF

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Publication number
EP0255707B1
EP0255707B1 EP87111089A EP87111089A EP0255707B1 EP 0255707 B1 EP0255707 B1 EP 0255707B1 EP 87111089 A EP87111089 A EP 87111089A EP 87111089 A EP87111089 A EP 87111089A EP 0255707 B1 EP0255707 B1 EP 0255707B1
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EP
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Prior art keywords
bolt
auxiliary apparatus
lubricating oil
oil pump
threaded
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EP87111089A
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German (de)
French (fr)
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EP0255707A2 (en
EP0255707A3 (en
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Adolf Fischer
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps

Definitions

  • the invention relates to an arrangement of a unit according to the preamble of the main claim.
  • DE-PS 538 769 shows and describes a flange connection for capacitor bottoms, the screw connection serving to mutually brace several flanges of components.
  • the screw connection is designed in two parts such that when a screw connection part is loosened to remove a component, the flanges of the remaining components remain clamped by means of the other screw connection part.
  • the screw connection comprises threaded bolts in both end regions with stop collars arranged between the threads. These interact on one side with recesses in an intermediate flange.
  • the stop collars are arranged at a distance from the immediately adjacent, releasable flange in order to achieve a sealing connection between the flanges such that the stop collars are countersunk in the intermediate flange.
  • a disadvantage of this type of two-part screw connection is the mutual influence of the screw connections when tightening and loosening.
  • the invention has for its object to show an arrangement by means of the screwing of a highly loaded machine part, by means of which an immediate clamping of the unit for its mounting is avoided.
  • the advantage of the invention lies in the indirect connection of the unit with the screw connection of the highly stressed machine part, so that the specific requirements of the pump operation can be better taken into account when choosing the material for the pump housing.
  • the bearing cover screw connection comprises inner and outer screw bolts and the lubricating oil pump or another unit is arranged on the outer bolts in the manner according to the invention. This significantly reduces the influence of the bearing cap deformation on the screw connection on the housing of the lubricating oil pump or another unit.
  • the outer screw bolts are designed according to a further feature as cap screws, this results in the advantage in the assembly process of the internal combustion engine that the screw connection for this bearing cap can be carried out completely and finally in the case of a bearing cap with an associated unit.
  • the separate mounting of the lubricating oil pump or of an assembly on the screw connection of the bearing cover allows the respective assembly to be installed independently of the screw connection of the bearing cover at a time that is favorable for the assembly of the internal combustion engine.
  • one of the screw bolts is preferably equipped with a threaded bolt with nut as a holding means for the unit.
  • the unit is a lubricating oil pump, it can have an outflow channel adjacent to the threaded bolt, which is arranged with a crankcase-side line essentially parallel to the common axis of the bolt and threaded bolt, with a connecting pipe inserted with radial play in the outflow channel and line in both end regions is centered in each case by means of elastic radial sealing rings.
  • the aforementioned assignment and design is particularly advantageous for a lubricating oil pump driven by the crankshaft via an enveloping gear with an adjusting device for tensioning the traction means of the enveloping gear.
  • the adjusting device can be a threaded bushing which is arranged rotatably in the fastening point opposite the threaded bolt in a threaded through-hole and via which the lubricating oil pump or another unit rests on the stop surface on the head of an outer screw bolt. If the nut on the threaded bolt of the first fastening point of the lubricating oil pump is moderately loosened, the tension in the traction mechanism of the sheathing gear can be adjusted by turning the threaded bushing in the second fastening point.
  • the tilting movement carried out by the lubricating oil pump around the first fastening point of the threaded bolt is due to the elastic at both ends stored connecting tube in the lubricating oil delivery circuit compensated in an advantageous manner.
  • a holding screw is provided which penetrates the threaded bushing and can be screwed into the head of the outer threaded bolt of the second fastening point.
  • a split crankshaft bearing 13 is arranged in an outer wall 10 of a crankcase 11 of a transverse wall 12 connecting an internal combustion engine, not shown.
  • the crankshaft bearing 13 comprises a bearing cover 14 with flange tabs 15.
  • the outer bolts 18 and 19 are arranged inclined to the longitudinal plane 16 of the machine at an angle with a crown on the bearing cover side.
  • Each of the outer bolts 18 and 19 is designed as a cap screw, each with a stop surface 22 opposite a machine-side clamping surface 21 for arranging an assembly 23. Furthermore, the head 24 of the outer screw bolt 18 is provided with a threaded bolt 25, while the head 26 of the other outer screw bolt 19 is equipped with a sack lock thread 27.
  • the threaded bolt 25 with a nut 28 and the blind hole thread 27 form devices for a separate mounting of the unit 23 on the outer bolts 18 and 19 of the bearing cap screw connection.
  • An assembly 23 serving as a lubricating oil pump bears against the stop surfaces 22 of the outer screw bolts 18 and 19.
  • the lubricating oil pump 23 has an outflow channel 29 which is adjacent to the first fastening point with the threaded bolt 25 and which is arranged with a line 30 on the crankcase essentially parallel to the common axis of the threaded bolt 18 and the threaded bolt 25.
  • a connecting tube 31 inserted in the outflow channel 29 and in the line 30 with radial play is centered in both end regions by means of an elastic radial sealing ring 32.
  • the lubricating oil pump 23 is driven by an endless traction means 33 of an enveloping gear 34 from the crankshaft, not shown.
  • the lubricating oil pump 23 is equipped in its second fastening point, which is formed with the screw bolt 19, with a threaded bushing 36 which is arranged in a threaded through bore 35 so as to be rotatable and which bears against the stop surface 22 on the head 26 of the screw bolt 19.
  • the lubricating oil pump 23 for tensioning the traction means 33 when the retaining bolt 37 of the second fastening point is removed and the nut 28 loosened on the threaded bolt 25 of the first fastening point.
  • the holding bolt 37 which coaxially engages the threaded bushing 36 with play and can be screwed into the head 26 of the threaded bolt 19, clamps a holding flange 39 of the lubricating oil pump 23 via the threaded bushing 36 against the head 26 of the outer threaded bolt 19 of the bearing cap screw connection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

Anordnung eines Aggregates mittels der Verschraubung eines hochbelasteten Maschinenteils, insbesondere bei BrennkraftmaschinenArrangement of an assembly by means of the screw connection of a highly stressed machine part, especially in internal combustion engines

Die Erfindung bezieht sich auf eine Anordnung eines Aggregates gemäß dem Oberbegriff des Hauptanspruches.The invention relates to an arrangement of a unit according to the preamble of the main claim.

Aus der US-A 1 667 728 ist es bekannt, eine Schmierölpumpe mittels der Verschraubung des Lagerdeckels eines geteilten Kurbelwellenlagers einer Brennkraftmaschine zu halten. Die Halteflansche des Pumpengehäuses unterliegen dabei der für die sichere Haltung des Lagerdeckels erforderlichen Vorspannung der Verschraubung. Der für das Pumpengehäuse gewählte Werkstoff muß demnach entsprechend druckfest sein. Bei hochbelasteten Lagerdeckeln mit lediglich zwei Schraubbolzen zur Halterung am Lagerstuhl können zudem Durchbiegungen des Lagerdeckels auftreten, die das in die Verschraubung des Lagerdeckels integrierte Pumpengehäuse auf Zug beanspruchen. Für diesen Fall ist für das Pumpengehäuse ein Werkstoff mit relativ hoher Zugfestigkeit zu wählen. In jedem der genannten Fälle ist somit ein relativ teuerer Werkstoff für das Pumpengehäuse erforderlich.From US-A 1 667 728 it is known to hold a lubricating oil pump by means of the screw connection of the bearing cover of a split crankshaft bearing of an internal combustion engine. The holding flanges of the pump housing are subject to the pre-tensioning of the screw connection required for the secure holding of the bearing cover. The material selected for the pump housing must accordingly be pressure-resistant. In the case of highly loaded bearing caps with only two screw bolts for mounting on the bearing bracket, deflections of the bearing cover can also occur, which strain the pump housing integrated in the screw connection of the bearing cover. In this case, a material with a relatively high tensile strength must be selected for the pump housing. In each of the cases mentioned, a relatively expensive material is therefore required for the pump housing.

Die DE-PS 538 769 zeigt und beschreibt eine Flanschverbindung für Kondensatorböden, wobei die Verschraubung der gegenseitigen Verspannung mehrerer Flansche von Bauteilen dient. Die Verschraubung ist zweiteilig gestaltet derart, daß mit dem Lösen eines Verschraubungsteiles zum Entfernen eines Bauteiles die Flansche der verbleibenden Bauteile mittels des anderen Verschraubungsteiles verspannt bleiben. Hierfür umfaßt die Verschraubung in beiden Endbereichen mit Gewinde versehene Bolzen mit zwischen den Gewinden angeordneten Anschlagbunden. Diese wirken einseitig mit Ausnehmungen eines zwischengeordneten Flansches zusammen. Zu dem unmittelbar benachbarten, lösbaren Flansch sind die Anschlagbunde zur Erzielung einer Dichtverbindung zwischen den Flanschen beabstandet angeordnet derart, daß die Anschlagbunde in dem zwischengeordneten Flansch versenkt angeordnet sind. Nachteilig bei dieser Art der zweiteiligen Verschraubung ist die gegenseitige Beeinflußung der Verschraubungen beim Anziehen und Lösen.DE-PS 538 769 shows and describes a flange connection for capacitor bottoms, the screw connection serving to mutually brace several flanges of components. The screw connection is designed in two parts such that when a screw connection part is loosened to remove a component, the flanges of the remaining components remain clamped by means of the other screw connection part. For this purpose, the screw connection comprises threaded bolts in both end regions with stop collars arranged between the threads. These interact on one side with recesses in an intermediate flange. The stop collars are arranged at a distance from the immediately adjacent, releasable flange in order to achieve a sealing connection between the flanges such that the stop collars are countersunk in the intermediate flange. A disadvantage of this type of two-part screw connection is the mutual influence of the screw connections when tightening and loosening.

Der Erfindung liegt die Aufgabe zugrunde, für ein mittels der Verschraubung eines hochbelasteten Maschinenteils gehaltenes Aggregat eine Anordnung aufzuzeigen, durch die eine unmittelbare Einspannung des Aggregates für seine Halterung vermieden ist.The invention has for its object to show an arrangement by means of the screwing of a highly loaded machine part, by means of which an immediate clamping of the unit for its mounting is avoided.

Diese Aufgabe wird bei einer gattungsgemäßen Anordnung mit den Merkmalen des Kennzeichenteils des Hauptanspruches gelöst. Der Vorteil der Erfindung liegt in der mittelbaren Verbindung des Aggregates mit der Verschraubung des hochbelasteten Maschinenteils, so daß bei der Wahl des Werkstoffes für das Pumpengehäuse den spezifischen Anforderungen des Pumpenbetriebes besser Rechnung getragen werden kann.This object is achieved in a generic arrangement with the features of the characterizing part of the main claim. The advantage of the invention lies in the indirect connection of the unit with the screw connection of the highly stressed machine part, so that the specific requirements of the pump operation can be better taken into account when choosing the material for the pump housing.

Um eine mittels der Verschraubung eines hochbelasteten Lagerdeckels eines geteilten Kurbelwellenlagers einer Brennkraftmaschine gehaltene Schmierölpumpe von dem Bereich größter elastischer Verformung des Lagerdeckels entfernt anordnen zu können, wird in weiterer Ausgestaltung der Erfindung vorgeschlagen, daß die Lagerdeckel-Verschraubung innere und äußere Schraubbolzen umfaßt und die Schmierölpumpe oder ein anderes Aggregat in erfindungsgemäßer Weise an den äußeren Schraubbolzen angeordnet ist. Damit wird der Einfluß der Lagerdeckelverformung über dessen Verschraubung auf das Gehäuse der Schmierölpumpe oder eines anderen Aggregates wesentlich reduziert. Werden die äußeren Schraubbolzen nach einem weiteren Merkmal als Kopfschrauben ausgebildet, so ergibt sich damit im Montageablauf der Brennkraftmaschine der Vorteil, daß bei einem Lagerdeckel mit zugeordnetem Aggregat die Verschraubung für diesen Lagerdeckel komplett und endgültig ausgeführt werden kann. Die gesonderte Halterung der Schmierölpumpe bzw. eines Aggregates an der Verschraubung des Lagerdeckels gestattet es, das jeweilige Aggregat zu einem für die Montage der Brennkraftmaschine günstigen Zeitpunkt unabhängig von der Lagerdeckel-Verschraubung zu montieren.In order to be able to arrange a lubricating oil pump held by the screwing of a highly loaded bearing cover of a split crankshaft bearing of an internal combustion engine away from the area of greatest elastic deformation of the bearing cover, it is proposed in a further embodiment of the invention that the bearing cover screw connection comprises inner and outer screw bolts and the lubricating oil pump or another unit is arranged on the outer bolts in the manner according to the invention. This significantly reduces the influence of the bearing cap deformation on the screw connection on the housing of the lubricating oil pump or another unit. If the outer screw bolts are designed according to a further feature as cap screws, this results in the advantage in the assembly process of the internal combustion engine that the screw connection for this bearing cap can be carried out completely and finally in the case of a bearing cap with an associated unit. The separate mounting of the lubricating oil pump or of an assembly on the screw connection of the bearing cover allows the respective assembly to be installed independently of the screw connection of the bearing cover at a time that is favorable for the assembly of the internal combustion engine.

Sind ferner zur gleichmäßigeren Verteilung der Kurbelwellenlagerbelastung in der das Kurbelwellenlager tragenden Querwand die äußeren Schraubbolzen zur Maschinenlängsmittelebene geneigt angeordnet, ist vorzugsweise einer der Schraubbolzen mit einem Gewindebolzen mit Mutter als Haltemittel für das Aggregat ausgerüstet. Ist ferner das Aggregat eine Schmierölpumpe, so kann diese einen dem Gewindebolzen benachbarten Abströmkanal aufweisen, der mit einer kurbelgehäuseseitigen Leitung im wesentlichen parallel zu der gemeinsamen Achse von Schraubbolzen und Gewindebolzen angeordnet ist, wobei ein mit radialem Spiel in Abströmkanal und Leitung eingesetztes Verbindungsrohr in beiden Endbereichen jeweils mittel elastischer Radialdichtringe zentriert ist. Durch diese parallele Zuordnung von Haltemittel und Verbindungsrohr ergibt sich eine vereinfachte Montage der Schmierölpumpe, wobei durch die elastischen Radialdichtringe Fluchtungsfehler selbsttätig ausgeglichen werden.Furthermore, if the outer screw bolts are arranged inclined to the longitudinal plane of the machine in order to distribute the crankshaft bearing load more evenly in the transverse wall carrying the crankshaft bearing, one of the screw bolts is preferably equipped with a threaded bolt with nut as a holding means for the unit. Furthermore, if the unit is a lubricating oil pump, it can have an outflow channel adjacent to the threaded bolt, which is arranged with a crankcase-side line essentially parallel to the common axis of the bolt and threaded bolt, with a connecting pipe inserted with radial play in the outflow channel and line in both end regions is centered in each case by means of elastic radial sealing rings. This parallel assignment of the holding means and the connecting tube results in a simplified assembly of the lubricating oil pump, wherein misalignments are automatically compensated for by the elastic radial sealing rings.

Die vorgenannte Zuordnung und Ausbildung ist besonders vorteilhaft für eine über Hüllgetriebe von der Kurbelwelle angetriebene Schmierölpumpe mit einer Einstellvorrichtung zum Spannen des Zugmittels des Hüllgetriebes. Die Einstellvorrichtung kann eine in der dem Gewindebolzen gegenüberliegenden Befestigungsstelle in einer Gewinde-Durchgangsbohrung drehbeweglich angeordnete Gewindebuchse sein, über die die Schmierölpumpe oder ein anderes Aggregat auf der Anschlagfläche am Kopf eines äußeren Schraubbolzens aufliegt. Bei mäßig gelockerter Mutter am Gewindebolzen der ersten Befestigungsstelle der Schmierölpumpe kann durch Drehen der Gewindebuchse in der zweiten Befestigungsstelle die Spannung im Zugmittel des Hüllgetriebes eingestellt werden. Die dabei von der Schmierölpumpe um die erste Befestigungsstelle des Gewindebolzens ausgeführte Kippbewegung wird durch das beidendig elastisch gelagerte Verbindungsrohr im Schmierölförderkreis in vorteilhafter Weise ausgeglichen. Zur endgültigen Befestigung der Schmierölpumpe ist neben dem Gewindebolzen mit seiner Mutter eine die Gewindebuchse durchsetzender und im Kopf des äußeren Schraubbolzens der zweiten Befestigungsstelle einschraubbare Halteschraube vorgesehen.The aforementioned assignment and design is particularly advantageous for a lubricating oil pump driven by the crankshaft via an enveloping gear with an adjusting device for tensioning the traction means of the enveloping gear. The adjusting device can be a threaded bushing which is arranged rotatably in the fastening point opposite the threaded bolt in a threaded through-hole and via which the lubricating oil pump or another unit rests on the stop surface on the head of an outer screw bolt. If the nut on the threaded bolt of the first fastening point of the lubricating oil pump is moderately loosened, the tension in the traction mechanism of the sheathing gear can be adjusted by turning the threaded bushing in the second fastening point. The tilting movement carried out by the lubricating oil pump around the first fastening point of the threaded bolt is due to the elastic at both ends stored connecting tube in the lubricating oil delivery circuit compensated in an advantageous manner. For the final fastening of the lubricating oil pump, in addition to the threaded bolt with its nut, a holding screw is provided which penetrates the threaded bushing and can be screwed into the head of the outer threaded bolt of the second fastening point.

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben.The invention is described with reference to an embodiment shown in the drawing.

In einer Außenwände 10 eines Kurbelgehäuses 11 einer nicht näher dargestellten Brennkraftmaschine verbindenden Querwand 12 ist ein geteiltes Kurbelwellenlager 13 angeordnet. Das Kurbelwellenlager 13 umfaßt einen Lagerdeckel 14 mit Flanschlappen 15. Zu einer Maschinenlängsmittelebene 16 parallele Schraubbolzen 17 verbinden den Lagerdeckel 14 mit der Querwand 12. Weitere Schraubbolzen 18 und 19 durchsetzen die über Distanzbüchsen 20 gegen die Querwand 12 abgestützten Flanschlappen 15 und verspannen den Deckel 14 zusätzlich an der Querwand 12. Die äußeren Schraubbolzen 18 und 19 sind zur Maschinen-Längsmittelebene 16 unter einem Winkel mit lagerdeckelseitigen Scheitel geneigt angeordnet. Jeder der äußeren Schraubbolzen 18 und 19 ist jeweils als Kopfschraube mit jeweils einer einer maschinenseitigen Spannfläche 21 gegenüberliegenden Anschlagfläche 22 zur Anordnung eines Aggregates 23 ausgebildet. Weiter ist der Kopf 24 des äußeren Schraubbolzen 18 mit einem Gewindebolzen 25 versehen, während der Kopf 26 des anderen äußeren Schraubbolzens 19 mit einem Sacklockgewinde 27 ausgerüstet ist. Der Gewindebolzen 25 mit einer Mutter 28 sowie das Sacklochgewinde 27 bilden Einrichtungen für eine gesonderte Halterung des Aggregates 23 an den äußeren Schraubbolzen 18 und 19 der Lagerdeckelverschraubung.A split crankshaft bearing 13 is arranged in an outer wall 10 of a crankcase 11 of a transverse wall 12 connecting an internal combustion engine, not shown. The crankshaft bearing 13 comprises a bearing cover 14 with flange tabs 15. Screw bolts 17, which are parallel to a longitudinal plane 16 of the machine, connect the bearing cover 14 to the transverse wall 12. Further screw bolts 18 and 19 penetrate the flange tabs 15 supported against the transverse wall 12 by means of spacer bushes 20 and additionally tension the cover 14 on the transverse wall 12. The outer bolts 18 and 19 are arranged inclined to the longitudinal plane 16 of the machine at an angle with a crown on the bearing cover side. Each of the outer bolts 18 and 19 is designed as a cap screw, each with a stop surface 22 opposite a machine-side clamping surface 21 for arranging an assembly 23. Furthermore, the head 24 of the outer screw bolt 18 is provided with a threaded bolt 25, while the head 26 of the other outer screw bolt 19 is equipped with a sack lock thread 27. The threaded bolt 25 with a nut 28 and the blind hole thread 27 form devices for a separate mounting of the unit 23 on the outer bolts 18 and 19 of the bearing cap screw connection.

An den Anschlagflächen 22 der äußeren Schraubbolzen 18 und 19 liegt ein als Schmierölpumpe dienendes Aggregat 23 an. Die Schmierölpumpe 23 weist einen der ersten Befestigungsstelle mit dem Gewindebolzen 25 benachbarten Abströmkanal 29 auf, der mit einer kurbelgehäuseseitigen Leitung 30 im wesentlichen parallel zu der gemeinsamen Achse von Schraubbolzen 18 und Gewindebolzen 25 angeordnet ist. Ein im Abströmkanal 29 und in der Leitung 30 jeweils mit radialem Spiel eingesetztes Verbindungsrohr 31 ist in beiden Endbereichen jeweils mittels eines elastischen Radialdichtringes 32 zentriert.An assembly 23 serving as a lubricating oil pump bears against the stop surfaces 22 of the outer screw bolts 18 and 19. The lubricating oil pump 23 has an outflow channel 29 which is adjacent to the first fastening point with the threaded bolt 25 and which is arranged with a line 30 on the crankcase essentially parallel to the common axis of the threaded bolt 18 and the threaded bolt 25. A connecting tube 31 inserted in the outflow channel 29 and in the line 30 with radial play is centered in both end regions by means of an elastic radial sealing ring 32.

Die Schmierölpumpe 23 ist über ein endloses Zugmittel 33 eines Hüllgetriebes 34 von der nicht gezeigten Kurbelwelle angetrieben. Die Schmierölpumpe 23 ist in ihrer zweiten, mit dem Schraubbolzen 19 gebildeten Befestigungsstelle mit einer in einer Gewinde-Durch-gangsbohrung 35 drehbeweglich angeordneten Gewindebuchse 36 ausgerüstet, die an der Anschlagfläche 22 am Kopf 26 des Schraubbolzens 19 anliegt. Über die Gewindebuchse 36 ist die Schmieröl pumpe 23 zum Spannen des Zugmittels 33 bei demontiertem Haltebolzen 37 der zweiten Befestigungsstelle und gelockerter Mutter 28 am Gewindebolzen 25 der ersten Befestigungsstelle lageverstellbar. Die zum Spannen des Zugmittels 33 von der Schmierölpumpe 23 um den Gewindebolzen 25 ausgeführten Kippbewegungen werden von den das Verbindungsrohr 31 zentrierenden Radialdichtringen 32 aufgefangen. Zur Befestigung der Schmierölpumpe 23 an den Schraubbolzen 18 und 19 der Verschraubung für den Lagerdeckel 14 wird einerseits die Mutter 28 auf dem Gewindebolzen 25 gegen einen Halteflansch 38 der Schmierölpumpe 23 verspannt. Andererseits verspannt der die Gewindebuchse 36 koaxial und mit Spiel durchsetzende und im Kopf 26 des Schraubbolzens 19 einschraubbare Haltebolzen 37 einen Halteflansch 39 der Schmierölpumpe 23 über die Gewindebuchse 36 gegen den Kopf 26 des äußeren Schraubbolzens 19 der Lagerdeckelverschraubung.The lubricating oil pump 23 is driven by an endless traction means 33 of an enveloping gear 34 from the crankshaft, not shown. The lubricating oil pump 23 is equipped in its second fastening point, which is formed with the screw bolt 19, with a threaded bushing 36 which is arranged in a threaded through bore 35 so as to be rotatable and which bears against the stop surface 22 on the head 26 of the screw bolt 19. About the threaded bush 36, the lubricating oil pump 23 for tensioning the traction means 33 when the retaining bolt 37 of the second fastening point is removed and the nut 28 loosened on the threaded bolt 25 of the first fastening point. The tilting movements carried out by the lubricating oil pump 23 around the threaded bolt 25 for tensioning the traction means 33 are absorbed by the radial sealing rings 32 centering the connecting pipe 31. To fasten the lubricating oil pump 23 to the bolts 18 and 19 of the screw connection for the bearing cover 14, on the one hand the nut 28 is clamped on the threaded bolt 25 against a holding flange 38 of the lubricating oil pump 23. On the other hand, the holding bolt 37, which coaxially engages the threaded bushing 36 with play and can be screwed into the head 26 of the threaded bolt 19, clamps a holding flange 39 of the lubricating oil pump 23 via the threaded bushing 36 against the head 26 of the outer threaded bolt 19 of the bearing cap screw connection.

Mit der vorbeschriebenen Anordnung ist eine von den Vorspannkräften der Lagerdeckelverschraubung entkoppelte Halterung einer Schmierölpumpe 23 erreicht, wobei über die Anordnung der Schmierölpumpe 23 an äußeren Schraubbolzen 18 und 19 der Verschraubung eines hochbelasteten Lagerdeckels 14 der nachteilige Einfluß von Lagerdeckelverformungen auf die Halterung der Schmierölpumpe 23 erheblich reduziert ist. Da somit das Gehäuse der Schmierölpumpe 23 wesentlich geringeren Belastungen aus seiner Anordnung am hochbelasteten Lagerdeckel 14 ausgesetzt ist, kann für das Gehäuse in vorteilhafter Weise ein betriebsspezifisch günstiger und preiswerter Werkstoff gewählt werden.With the arrangement described above, a mounting of a lubricating oil pump 23 decoupled from the pretensioning forces of the bearing cap screw connection is achieved, the disadvantageous influence of bearing cap deformations on the mounting of the lubricating oil pump 23 being considerably reduced by the arrangement of the lubricating oil pump 23 on outer bolts 18 and 19 of the screwing of a highly loaded bearing cap 14 is. Since the housing of the lubricating oil pump 23 is thus exposed to significantly lower loads due to its arrangement on the heavily loaded bearing cover 14, an operating-specific, more economical and inexpensive material can advantageously be selected for the housing.

Claims (5)

1. An arrangement of an auxiliary apparatus in connection with the bolt joint of a highly-loaded machine part, in particular in internal combustion engines, wherein the bolt joint (screw bolts 18, 19) serves for the direct attachment of the machine part on the machine side (bearing cover 14), characterised in that the bolt joint has stop faces (22) arranged facing away from the engine for the auxiliary apparatus (lubricating oil pump 23), against which the auxiliary apparatus is arranged so as to be clamped separately on the bolt joint by means of further screw arrangements (threaded bolt 25 with nut 28; tapped blind bore 27 with holding bolt 37).
2. An arrangement according to Claim 1, wherein a lubricating oil pump (23) is held by means of the bolt joint of the bearing cover (14) of a divided crankshaft bearing (13) of an internal combustion engine, characterised in that the bearing cover bolt joint comprises inner and outer screw bolts (17; 18, 19), the outer screw bolts (18, 19) are constructed as cap screws with, in each case, a stop face (22), and in/on the head (24, 26) of each screw bolt (18, 19) a tapped blind bore (27) and/or a threaded bolt (25) is arranged.
3. An arrangement according to Claims 1 and 2, characterised in that the outer screw bolts (18, 19) are arranged so as to be inclined towards the longitudinal central plane (16) of the engine at an angle with the apex on the bearing cover side, and one of the two outer screw bolts (18) of the bearing cover (14) is equipped at the head (24) with a threaded bolt (25) with nut (28) as holding means for the auxiliary apparatus or, respectively, the lubricating oil pump (23).
4. An arrangement according to Claims 1 to 3, characterised in that one of the outer screw bolts (18, 19) of the bolt joint is arranged substantially parallel to a connecting pipe (31) fixed on the auxiliary apparatus- and engine side via radial seals (32) elastically in fluid ducts (discharge channel 29, duct 30) of the auxiliary apparatus (lubricating oil pump 23) and the engine (10).
5. An arrangement according to Claims 1 to 4, characterised in that the stop face (22) on the head (26) of an outer screw bolt (18, 19) of the bolt joint serves for the abutting of a threaded bushing (36) which is arranged so as to be rotationally movable in a threaded through-bore (35) of the auxiliary apparatus (lubricating oil pump 23), which bushing serves for the adjustment of the auxiliary apparatus with loosened attachment of the apparatus (nut 28, threaded bolt 25) on the other screw bolt (18).
EP87111089A 1986-08-05 1987-07-31 Arrangement of an auxiliary apparatus by means of a bolt joint of a highly loaded machine part, especially at an internal-combustion engine Expired - Lifetime EP0255707B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3626530 1986-08-05
DE3626530A DE3626530C1 (en) 1986-08-05 1986-08-05 Arrangement of an assembly by means of the screw connection of a highly stressed machine part, especially in internal combustion engines

Publications (3)

Publication Number Publication Date
EP0255707A2 EP0255707A2 (en) 1988-02-10
EP0255707A3 EP0255707A3 (en) 1989-02-08
EP0255707B1 true EP0255707B1 (en) 1990-08-22

Family

ID=6306753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111089A Expired - Lifetime EP0255707B1 (en) 1986-08-05 1987-07-31 Arrangement of an auxiliary apparatus by means of a bolt joint of a highly loaded machine part, especially at an internal-combustion engine

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EP (1) EP0255707B1 (en)
DE (2) DE3626530C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136033A1 (en) * 1990-10-31 1992-05-07 Suzuki Motor Co INTERNAL COMBUSTION ENGINE

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3626529A1 (en) * 1986-08-05 1988-02-18 Bayerische Motoren Werke Ag INTERNAL COMBUSTION ENGINE WITH AN AGGREGAT IN THE CRANKCASE, ESPECIALLY A LUBRICATING OIL PUMP
DE19826286A1 (en) * 1998-06-12 1999-12-16 Volkswagen Ag Cylinder head for internal combustion engines and process for its manufacture
DE10139045B4 (en) 2001-08-08 2014-06-18 Bayerische Motoren Werke Aktiengesellschaft Crankcase for an internal combustion engine, in particular with mutually inclined cylinder rows, especially V-engine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190910877A (en) * 1908-11-20 1909-09-23 Albert De Dion Improvements in or relating to Oil Pumps for Explosion Engines.
US1667728A (en) * 1926-10-08 1928-05-01 Waukesha Motor Co Oil pump
GB315182A (en) * 1928-12-04 1929-07-11 Albert Godenir Improvements in and connected with affixing screws, bolts and the like
DE538769C (en) * 1930-07-13 1931-11-25 Bbc Brown Boveri & Cie Flange screw connection for condenser floors
US3057434A (en) * 1960-03-24 1962-10-09 Gen Motors Corp Gear pump and sump for engine lubrication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4136033A1 (en) * 1990-10-31 1992-05-07 Suzuki Motor Co INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
EP0255707A2 (en) 1988-02-10
EP0255707A3 (en) 1989-02-08
DE3764428D1 (en) 1990-09-27
DE3626530C1 (en) 1988-02-18

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