EP0640179B1 - Driver for an injection pump - Google Patents

Driver for an injection pump Download PDF

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Publication number
EP0640179B1
EP0640179B1 EP94909023A EP94909023A EP0640179B1 EP 0640179 B1 EP0640179 B1 EP 0640179B1 EP 94909023 A EP94909023 A EP 94909023A EP 94909023 A EP94909023 A EP 94909023A EP 0640179 B1 EP0640179 B1 EP 0640179B1
Authority
EP
European Patent Office
Prior art keywords
piston
entrainment member
base plate
transverse part
member according
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
Application number
EP94909023A
Other languages
German (de)
French (fr)
Other versions
EP0640179A1 (en
Inventor
Günter Kampichler
Herbert Geier
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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Publication date
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Publication of EP0640179A1 publication Critical patent/EP0640179A1/en
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Publication of EP0640179B1 publication Critical patent/EP0640179B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/147—Mounting or detaching of piston rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • 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
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/18944—Link connections

Definitions

  • the invention relates to a driver as a connection between the piston of an injection pump and a drive element which is loosely moved towards the piston piston at the drive end in accordance with the piston stroke, the piston end being formed by a widened base plate and the driver being pivotably attached to the drive element.
  • Such a driver is described in DE-C-2723969. It has a sliding groove into which the prepared base plate of the piston of the injection pump is inserted without play.
  • the driver comprises a plunger that runs in a longitudinal guide and is articulated to a rocker arm via a push rod. A driver guided in this way requires a considerable manufacturing outlay.
  • the present invention has for its object to provide a special driver with which a direct connection between the piston end and a drive element provided on the engine side can be easily established.
  • the driver is said to be easy to manufacture and component to be assembled and ensure a safe function even when the piston spring of the injection pump is replaced by a correspondingly spring-loaded drive element.
  • the driver attached to the drive element can be pivoted over the back of the footplate until it reaches an end position in which it is secured by gripping the piston. In its end position, the driver ensures a loose, almost play-free connection between the piston and the drive element, which acts directly on the piston, which in turn is guided in the pump cylinder.
  • the proposal according to the invention is particularly suitable for small diesel engines, for which it is important that particularly simple injection pumps can be used, e.g. those that do without the usual drive plunger with spring-loaded linear guide.
  • the driver has a transverse part which engages behind the base plate of the piston and which is provided with slots or openings for the entry of the piston end between the transverse part and the drive element.
  • a cross member allows the piston end, which is designed with a widened base plate, to be assembled in a simple manner with the drive element, in that the piston end enters through the slots or openings in the cross part of the driver before the driver is pivoted into the end position.
  • resilient projections are expediently provided on the cross part, which compress in the end position of the swiveling movement, engaging behind the piston on the side. These projections thus deform during the pivoting movement, in that they are expanded accordingly by the piston, in order then to bounce back behind the piston, so that the driver is fixed in the final pivoting position corresponding to its working position.
  • a driver of particularly simple design is designed, at least as far as its transverse part is concerned, as a stamped sheet metal part.
  • the cross member advantageously consists of two sheet metal brackets bent into a parallel position at a short distance from one another, the first of which extends directly over the rear of the footplate and the second of which carries the resilient projections.
  • the starting position for the assembly is a corresponding oblique position of the transverse part, so that the piston passes through the footplate in a straight line extended part of the elongated hole up can be extended to the system on the drive element.
  • the driver is then swiveled over the footplate and fixed in the final working position by the second sheet metal plate having a slot that is open against the swivel direction and, based on the end position of the swivel movement, after a narrowing formed by the resilient projections to an approximately corresponding to the piston diameter Round hole is expanded.
  • the entire driver is preferably designed as a stamped sheet metal part by forming bearing plates on opposite sides of the cross part, which are bent in planes perpendicular to the pivot axis and have corresponding pivot bearing bores.
  • the drive element advantageously comprises a pressure roller, its bearing bolt is also suitable for the mounting of the driver by means of the pivot bearing bores in the bearing plates.
  • Pages are spherical in accordance with the swivel path of the driver.
  • the figures of the drawing show only the piston 1 with an enlarged base plate 2 and the cylinder 3 of an injection pump.
  • the piston has an extension 4 outside the cylinder 3 for connecting a control rod (not shown).
  • the various control cams 5 are formed on the piston 1, by means of which the fuel flow is regulated in accordance with the piston stroke and the piston rotation caused by the control.
  • the bore 6 for the fuel inflow and the bore 7 for the fuel return flow are shown.
  • the stroke of the piston 1 results from the pivoting movement of the rocker arm 8 in the sense of the double arrow 9 about a pivot axis 10.
  • the rocker arm 8 has at its end a fork 11 (FIG. 3), between its fingers 12 a pressure roller 13 around a bolt 14 is rotatably mounted.
  • the pressure roller has an outer ring 15 and an inner ring 16, which are arranged coaxially to one another and ensure improved tolerance compensation through their bearing play.
  • a driver 17 is also mounted via corresponding pivot bearing bores in its side bearing plates 18.
  • the bridge between the bearing plates forms a cross member 19, which consists of two sheet metal brackets 20, 21 bent in a parallel position to one another.
  • the first sheet metal bracket 20 has a keyhole-shaped elongated hole 22, the enlarged part 23 of which enables the footplate 2 of the piston 1 to be threaded in, and the narrow part 24 of which is dimensioned in accordance with the diameter of the piston 1.
  • the second sheet metal tab 21 has a slot 25 that is open against the pivoting direction, which, based on the end position of the pivoting movement of the driver 17, has a constriction formed by resilient projections 26 and then has a round hole 27 corresponding to the piston diameter. To improve the spring properties, the slot 25 also has a narrow extension 28, which facilitates the slipping over of the resilient projections 26 over the piston 1.
  • the second sheet metal bracket 21 is shorter than the first sheet metal bracket 20 so as not to impede the threading of the piston end into the elongated hole 22 thereof.
  • the end position of the assembly is shown, i.e. the driver 17 is moved according to arrow 29 from the starting position (Fig. 1) to the end position (Fig. 2), which corresponds to the operating position of the engine.
  • any additional manipulation, i.e. assembly is reduced to a minimum.

Abstract

Described is a driver (17) used as the link-piece between the piston (1) of an injection pump and a drive element which rests freely against the end of the piston nearest the drive and moves with the piston. The driver is attached to the drive element in such a way that, in order to establish the link between the piston and the drive element, it can be rotated over the widened far face of a baseplate (2) located at the end of the piston until it reaches a final position in which it is secured by the fact that it grips the piston (1).

Description

Die Erfindung betrifft einen Mitnehmer als Verbindung zwischen dem Kolben einer Einspritzpumpe und einem lose gegen das antriebsseitige Kolbenende entsprechend dem Kolbenhub bewegten Antriebselement, wobei das Kolbenende durch eine verbreiterte Fußplatte gebildet und der Mitnehmer am Antriebselement schwenkbar befestigt ist.The invention relates to a driver as a connection between the piston of an injection pump and a drive element which is loosely moved towards the piston piston at the drive end in accordance with the piston stroke, the piston end being formed by a widened base plate and the driver being pivotably attached to the drive element.

Ein derartiger Mitnehmer ist in DE-C-2723969 beschrieben. Er weist eine Schiebenut auf, in welche die vorbereitete Fußplatte des Kolbens der Einspritzpumpe spielfrei eingeführt wird. Der Mitnehmer umfaßt einen Stößel, der in einer Längsführung läuft und über eine Schubstange gelenkig mit einem Schwinghebel verbunden ist. Ein derart geführter Mitnehmer erfordert einen beträchtlichen Herstellungsaufwand.Such a driver is described in DE-C-2723969. It has a sliding groove into which the prepared base plate of the piston of the injection pump is inserted without play. The driver comprises a plunger that runs in a longitudinal guide and is articulated to a rocker arm via a push rod. A driver guided in this way requires a considerable manufacturing outlay.

Demgegenüber liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen speziellen Mitnehmer zu schaffen, mit welchem auf einfache Weise eine direkte Verbindung zwischen dem Kolbenende und einem motorseitig vorgesehenen Antriebselement hergestellt werden kann. Der Mitnehmer soll aus einem einfach herzustellenden und zu montierenden Bauteil bestehen und eine sichere Funktion auch dann gewährleisten, wenn die Kolbenfeder der Einspritzpumpe ersetzt ist durch ein entsprechend federnd angedrücktes Antriebselement.In contrast, the present invention has for its object to provide a special driver with which a direct connection between the piston end and a drive element provided on the engine side can be easily established. The driver is said to be easy to manufacture and component to be assembled and ensure a safe function even when the piston spring of the injection pump is replaced by a correspondingly spring-loaded drive element.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zum Herstellen der Verbindung der am Antriebselement befestigte Mitnehmer über die Rückseite der Fußplatte bis zum Erreichen einer Endposition schwenkbar ist, in welcher er durch Umgreifen des Kolbens gesichert ist. In seiner Endposition sorgt der Mitnehmer für eine lose nahezu spielfreie Verbindung zwischen Kolben und Antriebselement, welches direkt auf den Kolben einwirkt, der seinerseits im Pumpenzylinder geführt ist.This object is achieved in that for establishing the connection, the driver attached to the drive element can be pivoted over the back of the footplate until it reaches an end position in which it is secured by gripping the piston. In its end position, the driver ensures a loose, almost play-free connection between the piston and the drive element, which acts directly on the piston, which in turn is guided in the pump cylinder.

Durch die Befestigung des Mitnehmers auf seiten des Antriebselements und die Möglichkeit, dessen Verbindung mit dem Kolbenende durch einfaches Verschwenken des Mitnehmers herzustellen, ergibt sich eine besonders einfache Montage der Einspritzpumpe am Motor. Nachdem der Kolben mit seiner verbreiterten Fußplatte in die Anlagestellung am Antriebselement gebracht ist, wird der am Antriebselement schwenkbar befestigte Mitnehmer einfach über die Fußplatte geschwenkt, so daß er über die Rückseite der Fußplatte greift und deren Abheben vom Antriebselement im Betrieb des Motors unterbindet.The attachment of the driver on the part of the drive element and the possibility of establishing its connection to the piston end by simply pivoting the driver results in a particularly simple assembly of the injection pump on the engine. After the piston with its widened base plate is brought into the contact position on the drive element, the driver pivotally attached to the drive element is simply placed over the base plate pivoted so that it reaches over the back of the footplate and prevents its lifting from the drive element during operation of the engine.

Der erfindungsgemäße Vorschlag eignet sich insbesondere für Kleindieselmotoren, bei welchen Wert darauf gelegt wird, daß besonders einfach ausgebildete Einspritzpumpen verwendet werden können, z.B. solche, welche ohne den üblichen Antriebsstößel mit gefederter Linearführung auskommen.The proposal according to the invention is particularly suitable for small diesel engines, for which it is important that particularly simple injection pumps can be used, e.g. those that do without the usual drive plunger with spring-loaded linear guide.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß der Mitnehmer ein die Fußplatte des Kolbens hintergreifendes Querteil aufweist, welches mit Schlitzen oder Öffnungen für den Eintritt des Kolbenendes zwischen Querteil und Antriebselement versehen ist. Ein derartiges Querteil ermöglicht auf einfache Weise den Zusammenbau des mit verbreiterter Fußplatte ausgebildeten Kolbenendes mit dem Antriebselement, indem das Kolbenende durch die Schlitze bzw. Öffnungen im Querteil des Mitnehmers eintritt, bevor der Mitnehmer in Endposition verschwenkt wird.In a further embodiment of the invention it is provided that the driver has a transverse part which engages behind the base plate of the piston and which is provided with slots or openings for the entry of the piston end between the transverse part and the drive element. Such a cross member allows the piston end, which is designed with a widened base plate, to be assembled in a simple manner with the drive element, in that the piston end enters through the slots or openings in the cross part of the driver before the driver is pivoted into the end position.

Zur Sicherung der Verbindung sind zweckmäßig federnde Vorsprünge am Querteil vorgesehen, welche in der Endposition der Schwenkbewegung, den Kolben seitlich hintergreifend, einfedern. Diese Vorsprünge verformen sich also während der Schwenkbewegung, indem sie durch den Kolben entsprechend aufgeweitet werden, um dann hinter dem Kolben wieder einzufedern, so daß der Mitnehmer in der endgültigen, seiner Arbeitsstellung entsprechenden Schwenkposition fixiert ist.To secure the connection, resilient projections are expediently provided on the cross part, which compress in the end position of the swiveling movement, engaging behind the piston on the side. These projections thus deform during the pivoting movement, in that they are expanded accordingly by the piston, in order then to bounce back behind the piston, so that the driver is fixed in the final pivoting position corresponding to its working position.

Ein besonders einfach ausgebildeter Mitnehmer ist, zumindest was sein Querteil betrifft, als Blechstanzteil ausgebildet. Das Querteil besteht dabei vorteilhaft aus zwei in eine parallele Lage mit geringem Abstand zueinander gebogenen Blechlaschen, deren erste unmittelbar über die Rückseite der Fußplatte greift und deren zweite die federnden Vorsprünge trägt.A driver of particularly simple design is designed, at least as far as its transverse part is concerned, as a stamped sheet metal part. The cross member advantageously consists of two sheet metal brackets bent into a parallel position at a short distance from one another, the first of which extends directly over the rear of the footplate and the second of which carries the resilient projections.

Indem die erste Blechlasche ein schlüssellochförmiges Langloch aufweist, dessen erweiterter Teil das Einfädeln der Fußplatte ermöglicht und dessen schmaler Teil entsprechend dem Kolbendurchmesser dimensioniert ist, ergibt sich als Ausgangsstellung für die Montage eine entsprechende Schräglage des Querteils, so daß der Kolben geradlinig mit seiner Fußplatte durch den erweiterten Teil des Langlochs bis zur Anlage auf dem Antriebselement ausgefahren werden kann. Danach wird der Mitnehmer über die Fußplatte geschwenkt und in der endgültigen Arbeitslage fixiert, indem die zweite Blechlasche einen gegen die Schwenkrichtung offenen Schlitz aufweist, der, bezogen auf die Endposition der Schwenkbewegung, nach einer durch die federnden Vorsprünge gebildeten Verengung zu einem etwa dem Kolbendurchmesser entsprechenden Rundloch erweitert ist.Since the first sheet metal bracket has a keyhole-shaped elongated hole, the extended part of which allows the footplate to be threaded in and the narrow part dimensioned according to the piston diameter, the starting position for the assembly is a corresponding oblique position of the transverse part, so that the piston passes through the footplate in a straight line extended part of the elongated hole up can be extended to the system on the drive element. The driver is then swiveled over the footplate and fixed in the final working position by the second sheet metal plate having a slot that is open against the swivel direction and, based on the end position of the swivel movement, after a narrowing formed by the resilient projections to an approximately corresponding to the piston diameter Round hole is expanded.

Bevorzugt ist der gesamte Mitnehmer als Blechstanzteil ausgebildet, indem auf gegenüberliegenden Seiten des Querteils Lagerbleche angeformt sind, welche in Ebenen senkrecht zur Schwenkachse umgebogen sind und entsprechende Schwenklagerbohrungen aufweisen. Wenn das Antriebselement vorteilhaft eine Andrückrolle umfaßt, so bietet sich deren Lagerbolzen gleichzeitig für die Lagerung des Mitnehmers mittels der Schwenklagerbohrungen der Lagerbleche an.The entire driver is preferably designed as a stamped sheet metal part by forming bearing plates on opposite sides of the cross part, which are bent in planes perpendicular to the pivot axis and have corresponding pivot bearing bores. If the drive element advantageously comprises a pressure roller, its bearing bolt is also suitable for the mounting of the driver by means of the pivot bearing bores in the bearing plates.

Zur Erleichterung der Schwenkmontage, aber auch für Ausführungen von Mitnehmern, die nur begrenzt elastisch verformbar sind, kann es zweckmäßig sein, daß Querteil und Fußplatte zumindest auf ihren einander zugeordneten Seiten entsprechend der Schwenkbahn des Mitnehmers ballig ausgebildet sind.To facilitate the swivel assembly, but also for designs of drivers that can only be elastically deformed to a limited extent, it may be expedient for the cross member and base plate to be at least associated with one another Pages are spherical in accordance with the swivel path of the driver.

Im Folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert. Es zeigt:

Fig. 1
einen axialen Längsschnitt durch eine Einspritzpumpe mit zugeordnetem Kipphebel, mit verschwenktem Mitnehmer
Fig. 2
die Darstellung gemäß Fig. 1 mit der Endposition des Mitnehmers und
Fig. 3
eine Draufsicht auf die Fig. 2, ohne Kolben.
An exemplary embodiment of the invention is explained below with reference to the drawing. It shows:
Fig. 1
an axial longitudinal section through an injection pump with an associated rocker arm, with pivoted driver
Fig. 2
1 with the end position of the driver and
Fig. 3
a plan view of FIG. 2, without pistons.

Die Figuren der Zeichnung zeigen von einer Einspritzpumpe lediglich den Kolben 1 mit erweiterter Fußplatte 2 und den Zylinder 3. Der Kolben besitzt außerhalb des Zylinders 3 noch einen Ansatz 4 für den Anschluß einer (nicht gezeichneten) Regelstange. An seinem der Fußplatte 2 gegenüberliegenden Ende sind am Kolben 1 die verschiedenen Steuerkurven 5 ausgebildet, mittels welchen entsprechend dem Kolbenhub und der durch die Regelung bedingten Kolbendrehung der Kraftstoffluß geregelt wird. Im Zylinder 3 sind die Bohrung 6 für den Kraftstoffzufluß und die Bohrung 7 für den Kraftstoffrückfluß eingezeichnet.The figures of the drawing show only the piston 1 with an enlarged base plate 2 and the cylinder 3 of an injection pump. The piston has an extension 4 outside the cylinder 3 for connecting a control rod (not shown). At its end opposite the base plate 2, the various control cams 5 are formed on the piston 1, by means of which the fuel flow is regulated in accordance with the piston stroke and the piston rotation caused by the control. In the cylinder 3, the bore 6 for the fuel inflow and the bore 7 for the fuel return flow are shown.

Der Hub des Kolbens 1 ergibt sich aufgrund der Schwenkbewegung des Kipphebels 8 im Sinne des Doppelpfeils 9 um eine Schwenkachse 10. Der Kipphebel 8 besitzt an seinem Ende eine Gabel 11 (Fig. 3), zwischen deren Fingern 12 eine Andrückrolle 13 um einen Bolzen 14 drehbar gelagert ist. Die Andrückrolle besitzt einen Außenring 15 und einen Innenring 16, welche zueinander koaxial angeordnet sind und durch ihr Lagerspiel einen verbesserten Toleranzausgleich gewährleisten.The stroke of the piston 1 results from the pivoting movement of the rocker arm 8 in the sense of the double arrow 9 about a pivot axis 10. The rocker arm 8 has at its end a fork 11 (FIG. 3), between its fingers 12 a pressure roller 13 around a bolt 14 is rotatably mounted. The pressure roller has an outer ring 15 and an inner ring 16, which are arranged coaxially to one another and ensure improved tolerance compensation through their bearing play.

Auf dem Schwenkbolzen 14 ist ferner gelagert ein Mitnehmer 17 über entsprechende Schwenklagerbohrungen in dessen seitlichen Lagerblechen 18. Die Brücke zwischen den Lagerblechen bildet ein Querteil 19, welches aus zwei in eine parallele Lage zueinander gebogenen Blechlaschen 20, 21 besteht. Die erste Blechlasche 20 besitzt ein schlüssellochförmiges Langloch 22, dessen erweiterter Teil 23 das Einfädeln der Fußplatte 2 des Kolbens 1 ermöglicht und dessen schmaler Teil 24 entsprechend dem Durchmesser des Kolbens 1 dimensioniert ist.On the pivot pin 14, a driver 17 is also mounted via corresponding pivot bearing bores in its side bearing plates 18. The bridge between the bearing plates forms a cross member 19, which consists of two sheet metal brackets 20, 21 bent in a parallel position to one another. The first sheet metal bracket 20 has a keyhole-shaped elongated hole 22, the enlarged part 23 of which enables the footplate 2 of the piston 1 to be threaded in, and the narrow part 24 of which is dimensioned in accordance with the diameter of the piston 1.

Die zweite Blechlasche 21 weist einen gegen die Schwenkrichtung offenen Schlitz 25 auf, der, bezogen auf die Endposition der Schwenkbewegung des Mitnehmers 17, eine durch federnde Vorsprünge 26 gebildete Verengung und daran anschließend ein dem Kolbendurchmesser entsprechendes Rundloch 27 aufweist. Zur Verbesserung der Federeigenschaften besitzt der Schlitz 25 noch eine schmale Verlängerung 28, welche das Überstreifen der dabei zurückfedernden Vorsprünge 26 über den Kolben 1 erleichtert. Die zweite Blechlasche 21 ist kürzer ausgebildet als die erste Blechlasche 20, um das Einfädeln des Kolbenendes in deren Langloch 22 nicht zu behindern.The second sheet metal tab 21 has a slot 25 that is open against the pivoting direction, which, based on the end position of the pivoting movement of the driver 17, has a constriction formed by resilient projections 26 and then has a round hole 27 corresponding to the piston diameter. To improve the spring properties, the slot 25 also has a narrow extension 28, which facilitates the slipping over of the resilient projections 26 over the piston 1. The second sheet metal bracket 21 is shorter than the first sheet metal bracket 20 so as not to impede the threading of the piston end into the elongated hole 22 thereof.

Gemäß den Fig. 1 und 2 sind einerseits die Anfangsposition des Mitnehmers 17 und andererseits dessen Endposition der Montage dargestellt, d.h. der Mitnehmer 17 wird gemäß Pfeil 29 aus der Anfangsposition (Fig. 1) in die Endposition (Fig. 2) bewegt, welch letztere der Betriebsstellung des Motors entspricht.1 and 2, on the one hand the starting position of the driver 17 and on the other hand, the end position of the assembly is shown, i.e. the driver 17 is moved according to arrow 29 from the starting position (Fig. 1) to the end position (Fig. 2), which corresponds to the operating position of the engine.

Die erläuterte Schwenkmontage des Mitnehmers 17 um dessen Schwenkachse 30 ermöglicht behinderungsfrei die Zuordnung der Fußplatte 2 des Kolbens 1 zur Andrückrolle 13, wobei davon auszugehen ist, daß bei der Montage die Achsen dieser Bauteile von vorne herein festliegen, d.h. der Kipphebel 13 kann nur um seine Schwenkachse verschwenkt, der Kolben 1 nur in Richtung des Kolbenhubs bewegt werden.The explained pivot mounting of the driver 17 about its pivot axis 30 enables the assignment of the foot plate 2 of the piston 1 to the pressure roller 13 without hindrance, it being assumed that the axes of these components are fixed from the front during assembly, ie the rocker arm 13 can only be about its Swivel axis pivoted, the piston 1 can only be moved in the direction of the piston stroke.

Bei der gewählten Ausführung des Mitnehmers 17 erübrigt sich nach dessen Einschwenken jede zusätzliche Manipulation, d.h. die Montage ist auf eine Minimalmaßnahme reduziert. Dabei ist bezüglich der Toleranzen der Schwenklagerbohrungen in den seitlichen Lagerblechen 18 des Mitnehmers 17 darauf zu achten, daß in dessen Endposition die Fußplatte 2 des Kolbens 1 ein geringes Spiel von etwa 0,05 bis 0,1 mm zwischen der ersten Blechlasche 20 und der Andrückrolle 13 besitzt.In the selected version of the driver 17, any additional manipulation, i.e. assembly is reduced to a minimum. With regard to the tolerances of the pivot bearing bores in the side bearing plates 18 of the driver 17, care must be taken that the base plate 2 of the piston 1 has a slight play of approximately 0.05 to 0.1 mm between the first plate bracket 20 and the pressure roller in its end position 13 owns.

Claims (9)

  1. Entrainment member (17) as a connection between the piston (1) of an injection pump and a driving member moving loosely towards the end of the piston on the driving side, corresponding to the piston stroke, the end of the piston being formed by an enlarged base plate (2) and the entrainment member (17) being pivotally attached to the driving member, characterised in that for producing the connection, the entrainment member (17) attached to the driving member may be pivoted across the rear side of the base plate (2) until it reaches an end position, in which it is secured by engaging around the piston (1).
  2. Entrainment member according to Claim 1, characterised in that it comprises a transverse part (19) engaging behind the base plate (2) of the piston (1), which transverse part is provided with slots or openings for the entry of the end of the piston between the transverse part (19) and driving member.
  3. Entrainment member according to Claim 1, characterised in that for securing the connection, resilient projections (26) are provided on the transverse part (19), which spring-in in the end position of the pivoting movement, engaging laterally behind the piston (1).
  4. Entrainment member according to Claim 2, characterised in that at least its transverse part (19) is constructed as a stamped sheet metal part.
  5. Entrainment member according to Claim 4, characterised in that the transverse part (19) consists of two sheet metal flaps (20, 21) bent into a parallel position at a short distance apart, whereof the first (20) engages directly above the rear side of the base plate (2) and whereof the second (21) supports the resilient projections (26).
  6. Entrainment member according to Claim 5, characterised in that the first sheet metal flap (20) has a keyhole-shaped slot (22), whereof the enlarged part (23) facilitates the threading-in of the base plate (2) and whereof the narrow part (24) has dimensions corresponding to the piston diameter.
  7. Entrainment member according to Claim 5, characterised in that the second sheet metal flap (21) has a slot (25) open in opposition to the pivoting direction, which, with respect to the end position of the pivoting movement, after a narrow portion formed by the resilient projections (26), is enlarged to form a round hole (27) corresponding approximately to the piston diameter.
  8. Entrainment member according to Claim 4, characterised in that integrally formed on opposite sides of the transverse part (19) are bearing plates (18), which are bent over in planes at right angles to the pivot axis (30) and comprise corresponding swivel bearing bores.
  9. Entrainment member according to Claim 2, characterised in that at least on their associated sides, the transverse part (19) and base plate (2) are constructed to be spherical corresponding to the pivoting trajectory of the entrainment member (17).
EP94909023A 1993-03-11 1994-02-23 Driver for an injection pump Expired - Lifetime EP0640179B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4307700A DE4307700C2 (en) 1993-03-11 1993-03-11 Driver for injection pump
DE4307700 1993-03-11
PCT/EP1994/000508 WO1994020747A1 (en) 1993-03-11 1994-02-23 Driver for an injection pump

Publications (2)

Publication Number Publication Date
EP0640179A1 EP0640179A1 (en) 1995-03-01
EP0640179B1 true EP0640179B1 (en) 1996-12-11

Family

ID=6482511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94909023A Expired - Lifetime EP0640179B1 (en) 1993-03-11 1994-02-23 Driver for an injection pump

Country Status (7)

Country Link
US (1) US5522304A (en)
EP (1) EP0640179B1 (en)
JP (1) JP3437846B2 (en)
CN (1) CN1035209C (en)
AU (1) AU6204694A (en)
DE (2) DE4307700C2 (en)
WO (1) WO1994020747A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957673A (en) * 1993-03-11 1999-09-28 Motorenfabrik Hatz Gmbh & Co. Kg. Injection pump for diesel engines
SE501026C2 (en) * 1993-03-17 1994-10-24 Volvo Ab Fuel injection device for internal combustion engines
CA2299540A1 (en) * 1997-09-26 1999-04-08 Magna Interior Systems Inc. Fastener assembly for joining two interior panels

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957753A (en) * 1928-09-10 1934-05-08 Abraham M Babitch Fuel pump with accessible body
US1957669A (en) * 1931-01-12 1934-05-08 Edward A Rockwell Fuel pump
US1995507A (en) * 1932-11-12 1935-03-26 Gordon W Harry Fuel pump
US3186350A (en) * 1963-04-29 1965-06-01 Acf Ind Inc Fuel pump
US3741022A (en) * 1970-11-23 1973-06-26 J Olson Probing device for microcircuits
DE2723969C2 (en) * 1977-05-27 1983-02-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Fuel injection pump for internal combustion engines
US4352586A (en) * 1980-12-29 1982-10-05 Ford Motor Company Linkage system
GB2101230B (en) * 1981-06-13 1984-10-10 Lucas Ind Plc Fuel injection pump
JPS60147510A (en) * 1984-01-13 1985-08-03 Toyota Motor Corp Spring of end pivot type locker arm for internal-combustion engine moving valve system
GB9012843D0 (en) * 1990-06-08 1990-08-01 Lucas Ind Plc Fuel injection apparatus

Also Published As

Publication number Publication date
CN1105505A (en) 1995-07-19
US5522304A (en) 1996-06-04
DE4307700A1 (en) 1994-09-15
JPH07506653A (en) 1995-07-20
DE4307700C2 (en) 1996-04-11
AU6204694A (en) 1994-09-26
JP3437846B2 (en) 2003-08-18
EP0640179A1 (en) 1995-03-01
DE59401247D1 (en) 1997-01-23
CN1035209C (en) 1997-06-18
WO1994020747A1 (en) 1994-09-15

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