EP3505300B1 - Device for removing a sealing ring of an injector - Google Patents

Device for removing a sealing ring of an injector Download PDF

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Publication number
EP3505300B1
EP3505300B1 EP18200371.5A EP18200371A EP3505300B1 EP 3505300 B1 EP3505300 B1 EP 3505300B1 EP 18200371 A EP18200371 A EP 18200371A EP 3505300 B1 EP3505300 B1 EP 3505300B1
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EP
European Patent Office
Prior art keywords
injector
guide
sealing ring
designed
guide element
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EP18200371.5A
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German (de)
French (fr)
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EP3505300A1 (en
Inventor
Helmut Benzinger
Josef Hiller
Steffen Huemmer
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3505300A1 publication Critical patent/EP3505300A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/02—Jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028—Tools for removing or installing seals

Definitions

  • the invention relates to a device, in particular pliers, for removing a sealing ring from an injector, according to the preamble of patent claim 1.
  • Such a device goes for example from the US 1,936,981 A. forth.
  • Fuel injectors are fitted with sealing rings, e.g. made of Teflon, to seal the interface between the injector and the engine when the injector is installed in the engine, in particular in an intake tract or combustion chamber of the engine.
  • sealing rings e.g. made of Teflon
  • the sealing rings are wear parts that must be replaced when the injector is removed and reinstalled.
  • the injectors themselves generally have a significantly longer service life. When removing a sealing ring from an injector using conventional pliers, there is a risk that the injector will be damaged and must be replaced prematurely.
  • the invention provides a device according to claim 1.
  • a device for removing a sealing ring from an injector has two levers which are pivotally connected to one another. On each of the two Lever is formed at least one contact surface ("cutting surface") for gripping a sealing ring mounted on an injector. At least one guide element is provided on at least one of the two levers, which is designed to guide the injector such that the sealing ring mounted on the injector is positioned opposite the contact surfaces of the device.
  • the at least one guide element ensures that only the sealing ring to be replaced, but not the injector itself, comes into contact with the contact / cutting surfaces of the device. Damage to the injector by the contact / cutting surfaces of the device can thus be reliably prevented.
  • the at least one guide element has at least one recess which is designed to receive the injector.
  • the injector is arranged in the correct position, in which a sealing ring attached to the injector is positioned on the contact surfaces of the device, when it is in the at least one recess.
  • the at least one recess is designed as a hollow cylinder half in order to receive a cylindrical region of the injector and to fix it in the radial direction.
  • the at least one guide element has a stop which limits the mobility of the injector in its axial direction in order to position and fix the injector in the axial direction.
  • a guide element is arranged on two opposite sides of the at least one lever / the at least one contact surface.
  • At least two contact surfaces are formed on each lever, and the at least one guide element has a first guide / recess and at least one second guide / recess.
  • the first guide / recess is designed such that the sealing ring is positioned opposite the first contact surface when the injector is arranged in the first guide / recess.
  • the second guide / recess is designed such that the sealing ring is positioned opposite the second contact surface when the injector is arranged in the second guide / recess.
  • the first guide / depression and the first contact area can be used in particular for a first injector type, and the second guide / depression and the second contact area can be used for a second injector type, which differs from the first injector type.
  • the same device can be used to remove the sealing rings from at least two different injector types.
  • injectors from at least two different generations or injectors for different types of fuel e.g. gasoline and diesel fuel
  • the at least one guide element is formed integrally with the at least one lever. In this way, the at least one guide element can be inexpensively formed together with the at least one lever.
  • the at least one guide element is detachably attached to the at least one lever.
  • a guide element formed separately from the at least one lever can be formed from a different material than the lever.
  • the lever with the contact / cutting surface can be made of metal and the at least one guide element can be made of plastic.
  • a guide element detachably attached to the at least one lever can be exchanged. This makes it possible to adapt the device to different injector types by exchanging the at least one guide element.
  • the levers are designed as embossed molded parts. Levers designed as embossed molded parts can be produced inexpensively.
  • the device has an elastic element, for example a spring, which is designed to press the levers into a predetermined position. In this way, the handling of the device can be simplified.
  • an elastic element for example a spring
  • Figure 1 shows a side view of a device 2, in particular a pair of pliers 2 according to an embodiment of the invention.
  • the Figures 2 and 3rd each show a perspective view of the in the Figure 1 shown device 2.
  • the pliers 2 have two levers 4, 6, which are connected to one another by a joint 8 in such a way that they can be pivoted relative to one another.
  • Each of the two levers 4, 6 has one in each Figures 1 to 3 Grip region 4a, 6a shown on the left, which is designed to grip the respective lever 4, 6, and one on the other side of the joint 8 (in FIGS Figures 1 to 3 right)) jaw area 4b, 6b, each for gripping one in the Figures 1 to 3 injector 30, not shown (see Figures 4 and 5 ) is trained.
  • An elastic element 10 for example a spring, is arranged between the grip areas 4a, 6a of the two levers 4, 6 and presses the two grip areas 4a, 6a apart.
  • the grip areas 4a, 6a and the jaw areas 4b, 6b are therefore separated from one another in the unactuated state of the pliers 2, as shown in FIGS Figures 1 to 3 is shown.
  • two are each formed as recesses 12a, 12b.
  • the boundary surfaces of the recesses 12a, 12b are designed as gripping or cutting surfaces, which make it possible to mount a sealing ring 32 mounted on an injector 30 (see Figures 4 and 5 ) to grip and remove from the injector 30.
  • Two guide elements 14, 16 are formed on one of the two jaw regions 4b, 6b.
  • the guide elements 14, 16 can in particular with the aid of screws 18 (see Figure 3 ) be attached to the lever 4.
  • the guide elements 14, 16 can be formed integrally with the lever 4.
  • the two guide elements 14, 16 have guides 14a, 14b, 16a designed as recesses, which are each designed to receive a region of an injector 30.
  • the depressions 14a, 14b, 16a are each designed in the form of a half hollow cylinder (hollow cylinder half shell) and make it possible in each case to receive a cylindrical region 34 of an injector 30 and to hold it in a predetermined position.
  • the guide elements 14, 16 are formed with stops 20, 22 against which the injector 30 bears in the axial direction when it is arranged in the correct position in the respective guide / recess 14a, 14b, 16a.
  • this shows in the Figures 1 and 3rd the guide element 16 facing the viewer has at the end of the recess 16a a stop 20 against which the tip of an injector 30 inserted into the recesses 14a, 16a strikes.
  • the other guide element 14 has a stop surface 22 (see Figure 2 ), on which a bobbin 36 of the injector 30 comes to a stop when the injector 30 is inserted into the second recess 14b (see Fig. 4 ).
  • Each combination of depressions 12a, 14a, 16a or 12b, 14b and stops 20, 22 is designed for a different injector type.
  • the one in the figures Pliers 2 shown therefore make it possible to remove sealing rings 32 from at least two different injector types.
  • Figure 4 shows an injector 30 which is inserted into the first guides / depressions 14a, 16a of the pliers 2. That in the Figure 4 The end of the injector 30 shown on the left abuts the stop 20, so that the position of the injector 30 relative to the pliers 2 is fixed both in the radial and in the axial direction.
  • the gripping / cutting surface formed on the recess 12a of the opposing jaw region 4b only comes into contact with the sealing ring 32 applied to the cylindrical region 34 of the injector 30 when the pliers 2 are closed, but does not touch the cylindrical region 34 of the injector 30.
  • Figure 5 shows an injector 30 which is inserted into the second guide / recess 14b.
  • the position of the injector 30 in its axial direction is not determined by a stop at the tip of the injector 30. Instead, a coil former 36 of the injector 30 strikes a stop surface 22 (see Figure 2 ), which is formed on the first guide element 14. The position of the injector 30 and in particular of the sealing ring 32 applied to the cylindrical region 34 of the injector 30 is thereby defined in the axial direction of the injector 30.
  • the gripping / cutting surface formed on the recess 12b in the jaw region 4b of the pliers 2 only comes into contact with the sealing ring 32 when the pliers 2 are closed, but not with the cylindrical region 34 of the injector 30, so that here too Damage to the injector 30 by the gripping / cutting surfaces of the pliers 2 is reliably avoided.
  • a pair of pliers 2 according to one embodiment of the invention therefore makes it possible to tangentially seal seals 32 applied to an injector 30 and to remove them easily without the risk of injector 30 being damaged when the sealing ring 32 is removed.

Description

Die Erfindung betrifft eine Vorrichtung, insbesondere eine Zange, zum Entfernen eines Dichtringes von einem Injektor, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device, in particular pliers, for removing a sealing ring from an injector, according to the preamble of patent claim 1.

Eine derartige Vorrichtung geht beispielsweise aus der US 1 936 981 A hervor.Such a device goes for example from the US 1,936,981 A. forth.

Stand der TechnikState of the art

Kraftstoffeinspritzvorrichtungen ("Injektoren") sind mit Dichtringen, z.B. aus Teflon, ausgestattet, um die Schnittstelle zwischen dem Injektor und dem Motor abzudichten, wenn der Injektor in den Motor, insbesondere in einen Ansaugtrakt oder Brennraum des Motors eingebaut ist.Fuel injectors ("injectors") are fitted with sealing rings, e.g. made of Teflon, to seal the interface between the injector and the engine when the injector is installed in the engine, in particular in an intake tract or combustion chamber of the engine.

Die Dichtringe sind Verschleißteile, die ausgetauscht werden müssen, wenn der Injektor ausgebaut und wieder eingebaut wird. Die Injektoren selbst haben in der Regel eine deutlich längere Lebensdauer. Beim Entfernen eines Dichtringes von einem Injektor mit einer herkömmlichen Zange besteht die Gefahr, dass der Injektor beschädigt wird und vorzeitig ausgetauscht werden muss.The sealing rings are wear parts that must be replaced when the injector is removed and reinstalled. The injectors themselves generally have a significantly longer service life. When removing a sealing ring from an injector using conventional pliers, there is a risk that the injector will be damaged and must be replaced prematurely.

In dem Dokument US 1 936 981 A ist ein Packungsaufsetzwerkzeug für Stopfbuchsen mit einem Paar gekreuzter, schwenkbar verbundener Hebel, die an einem Ende so geformt sind, dass sie ein Paar Griffe und an ihren gegenüberliegenden Enden ein Paar doppelte Backen bilden, gezeigt.In the document US 1,936,981 A. is a stuffing box packing tool with a pair of crossed, pivotally connected levers shaped at one end to form a pair of handles and a pair of double jaws at their opposite ends.

In dem Dokument US 6 389 937 B1 ist eine Universalgripzange gezeigt mit einem ersten Schaftkörper und einem zweiten Schaftkörper gezeigt.In the document US 6 389 937 B1 a universal grip pliers is shown with a first shaft body and a second shaft body.

Es ist eine Aufgabe der Erfindung, die Gefahr, den Injektor beim Entfernen eines auf dem Injektor angebrachten Dichtringes zu beschädigen, zu verringern bzw. auszuschließen.It is an object of the invention to reduce or eliminate the risk of damaging the injector when removing a sealing ring attached to the injector.

Offenbarung der Erfindung:Disclosure of the Invention:

Die Erfindung sieht eine Vorrichtung gemäß dem Patentanspruch 1 vor.The invention provides a device according to claim 1.

Gemäß einem Ausführungsbeispiel der Erfindung hat eine Vorrichtung, insbesondere eine Zange, zum Entfernen eines Dichtringes von einem Injektor zwei Hebel, die schwenkbar miteinander verbundenen sind. An jedem der beiden Hebel ist wenigstens eine Kontaktfläche ("Schneidfläche") zum Greifen eines an einem Injektor montierten Dichtringes ausgebildet. An wenigstens einem der beiden Hebel ist wenigstens ein Führungselement vorgesehen, das ausgebildet ist, den Injektor so zu führen, dass der auf dem Injektor montierte Dichtring den Kontaktflächen der Vorrichtung gegenüberliegend positioniert ist.According to one embodiment of the invention, a device, in particular a pair of pliers, for removing a sealing ring from an injector has two levers which are pivotally connected to one another. On each of the two Lever is formed at least one contact surface ("cutting surface") for gripping a sealing ring mounted on an injector. At least one guide element is provided on at least one of the two levers, which is designed to guide the injector such that the sealing ring mounted on the injector is positioned opposite the contact surfaces of the device.

Durch das wenigstens eine Führungselement wird sichergestellt, das nur der auszutauschende Dichtring, nicht aber der Injektor selbst in Kontakt mit den Kontakt- / Schneidflächen der Vorrichtung kommt. Eine Beschädigung des Injektors durch die Kontakt- / Schneidflächen der Vorrichtung kann so zuverlässig verhindert werden.The at least one guide element ensures that only the sealing ring to be replaced, but not the injector itself, comes into contact with the contact / cutting surfaces of the device. Damage to the injector by the contact / cutting surfaces of the device can thus be reliably prevented.

In einer Ausführungsform weist das wenigstens eine Führungselement wenigstens eine Ausnehmung auf, die zur Aufnahme des Injektors ausgebildet ist. Der Injektor ist in der korrekten Position, in der ein auf dem Injektor angebrachter Dichtring an den Kontaktflächen der Vorrichtung positioniert ist, angeordnet, wenn er sich in der wenigstens einen Ausnehmung befindet.In one embodiment, the at least one guide element has at least one recess which is designed to receive the injector. The injector is arranged in the correct position, in which a sealing ring attached to the injector is positioned on the contact surfaces of the device, when it is in the at least one recess.

In einer Ausführungsform ist die wenigstens eine Ausnehmung als Hohlzylinderhälfte ausgebildet, um einen zylindrisch ausgebildeten Bereich des Injektors aufzunehmen und in radialer Richtung zu fixieren.In one embodiment, the at least one recess is designed as a hollow cylinder half in order to receive a cylindrical region of the injector and to fix it in the radial direction.

Das wenigstens eine Führungselement weist einen Anschlag auf, der die Beweglichkeit des Injektors in seiner Axialrichtung begrenzt, um den Injektor in Axialrichtung zu positionieren und zu fixieren.The at least one guide element has a stop which limits the mobility of the injector in its axial direction in order to position and fix the injector in the axial direction.

In einer Ausführungsform ist jeweils ein Führungselement auf zwei einander gegenüberliegenden Seiten des wenigstens einen Hebels / der wenigstens einen Kontaktfläche angeordnet. Durch zwei auf gegenüberliegenden Seiten des wenigstens einen Hebels / der wenigstens einen Kontaktfläche angeordnete Führungselemente kann der Injektor auf beiden Seiten der Kontaktfläche abgestützt und so besonders zuverlässig in der gewünschten Position gehalten werden.In one embodiment, a guide element is arranged on two opposite sides of the at least one lever / the at least one contact surface. By means of two guide elements arranged on opposite sides of the at least one lever / the at least one contact surface, the injector can be supported on both sides of the contact surface and can thus be held in the desired position particularly reliably.

In einer Ausführungsform sind an jedem Hebel wenigstens zwei Kontaktflächen ausgebildet, und das wenigstens eine Führungselement weist eine erste Führung / Vertiefung und wenigstens eine zweite Führung / Vertiefung auf. Die erste Führung / Vertiefung ist so ausgebildet, dass der Dichtring gegenüber der ersten Kontaktfläche positioniert ist, wenn der Injektor in der ersten Führung / Vertiefung angeordnet ist. Die zweite Führung / Vertiefung ist so ausgebildet, dass der Dichtring gegenüber der zweiten Kontaktfläche positioniert ist, wenn der Injektor in der zweiten Führung / Vertiefung angeordnet ist. Die erste Führung / Vertiefung und die erste Kontaktfläche können insbesondere für einen ersten Injektortyp, und die zweite Führung / Vertiefung und die zweite Kontaktfläche können für einen zweiten Injektortyp, der sich vom ersten Injektortyp unterscheidet, ausgebildet sein.In one embodiment, at least two contact surfaces are formed on each lever, and the at least one guide element has a first guide / recess and at least one second guide / recess. The first guide / recess is designed such that the sealing ring is positioned opposite the first contact surface when the injector is arranged in the first guide / recess. The second guide / recess is designed such that the sealing ring is positioned opposite the second contact surface when the injector is arranged in the second guide / recess. The first guide / depression and the first contact area can be used in particular for a first injector type, and the second guide / depression and the second contact area can be used for a second injector type, which differs from the first injector type.

Auf diese Weise kann die gleiche Vorrichtung verwendet werden, um die Dichtringe von wenigstens zwei verschiedenen Injektortypen zu entfernen. Insbesondere können Injektoren aus wenigstens zwei verschiedenen Generationen oder Injektoren für unterschiedliche Kraftstoffarten (z.B. Otto- und Diesel-Kraftstoff) mit der gleichen Vorrichtung bearbeitet werden.In this way, the same device can be used to remove the sealing rings from at least two different injector types. In particular, injectors from at least two different generations or injectors for different types of fuel (e.g. gasoline and diesel fuel) can be processed with the same device.

In einer Ausführungsform ist das wenigstens eine Führungselement integral mit dem wenigstens einen Hebel ausgebildet. Auf diese Weise kann das wenigstens eine Führungselement kostengünstig gemeinsam mit den wenigstens einen Hebel ausgebildet werden.In one embodiment, the at least one guide element is formed integrally with the at least one lever. In this way, the at least one guide element can be inexpensively formed together with the at least one lever.

In einer Ausführungsform ist das wenigstens eine Führungselement lösbar an dem wenigstens einen Hebel angebracht. Ein getrennt von dem wenigstens einen Hebel ausgebildetes Führungselement kann aus einem anderen Material als der Hebel ausgebildet sein. Insbesondere kann der Hebel mit der Kontakt- / Schneidfläche aus Metall und das wenigstens eine Führungselement aus Kunststoff ausgebildet sein. Ein lösbar an dem wenigstens einen Hebel angebrachtes Führungselement kann ausgetauscht werden. Dies ermöglicht es, die Vorrichtung durch Austauschen des wenigstens einen Führungselements an unterschiedliche Injektortypen anzupassen.In one embodiment, the at least one guide element is detachably attached to the at least one lever. A guide element formed separately from the at least one lever can be formed from a different material than the lever. In particular, the lever with the contact / cutting surface can be made of metal and the at least one guide element can be made of plastic. A guide element detachably attached to the at least one lever can be exchanged. This makes it possible to adapt the device to different injector types by exchanging the at least one guide element.

In einer Ausführungsform sind die Hebel als geprägte Formteile ausgebildet. Als geprägte Formteile ausgebildete Hebel können kostengünstig hergestellt werden.In one embodiment, the levers are designed as embossed molded parts. Levers designed as embossed molded parts can be produced inexpensively.

In einer Ausführungsform weist die Vorrichtung ein elastisches Element, beispielsweise eine Feder, auf, das ausgebildet ist, die Hebel in eine vorgegebene Position zu drücken. Auf diese Weise kann die Handhabung der Vorrichtung vereinfacht werden.In one embodiment, the device has an elastic element, for example a spring, which is designed to press the levers into a predetermined position. In this way, the handling of the device can be simplified.

Ausführungsbeispiele der Erfindung werden im Folgenden unter Bezugnahme auf die beigefügten Figuren beschrieben.Embodiments of the invention are described below with reference to the accompanying figures.

Kurze Beschreibung der FigurenBrief description of the figures

  • Figur 1 zeigt eine Seitenansicht einer Vorrichtung (Zange) gemäß einem Ausführungsbeispiel der Erfindung. Figure 1 shows a side view of a device (pliers) according to an embodiment of the invention.
  • Figur 2 zeigt eine erste perspektivische Ansicht der in der Figur 1 gezeigten Vorrichtung. Figure 2 shows a first perspective view of the in the Figure 1 shown device.
  • Figur 3 zeigt eine zweite perspektivische Ansicht der in der Figur 1 gezeigten Vorrichtung. Figure 3 shows a second perspective view of the in the Figure 1 shown device.
  • Figur 4 zeigt einen Injektor, der in eine erste Führung der Vorrichtung eingelegt ist. Figure 4 shows an injector which is inserted into a first guide of the device.
  • Figur 5 zeigt einen Injektor, der in eine zweite Führung der Vorrichtung eingelegt ist. Figure 5 shows an injector which is inserted into a second guide of the device.
FigurenbeschreibungFigure description

Figur 1 zeigt eine Seitenansicht einer Vorrichtung 2, insbesondere einer Zange 2 gemäß einem Ausführungsbeispiel der Erfindung. Die Figuren 2 und 3 zeigen jeweils eine perspektivische Ansicht der in der Figur 1 gezeigten Vorrichtung 2. Figure 1 shows a side view of a device 2, in particular a pair of pliers 2 according to an embodiment of the invention. The Figures 2 and 3rd each show a perspective view of the in the Figure 1 shown device 2.

Die Zange 2 hat zwei Hebel 4, 6, die durch ein Gelenk 8 so miteinander verbunden sind, dass sie gegeneinander schwenkbar sind.The pliers 2 have two levers 4, 6, which are connected to one another by a joint 8 in such a way that they can be pivoted relative to one another.

Jeder der beiden Hebel 4, 6 hat jeweils einen in den Figuren 1 bis 3 links dargestellten Griffbereich 4a, 6a, der zum Greifen des jeweiligen Hebels 4, 6 ausgebildet ist, sowie einen auf der anderen Seite des Gelenks 8 (in den Figuren 1 bis 3 rechts dargestellten) Backenbereich 4b, 6b, der jeweils zum Greifen eines in den Figuren 1 bis 3 nicht gezeigten Injektors 30 (siehe Figuren 4 und 5) ausgebildet ist.Each of the two levers 4, 6 has one in each Figures 1 to 3 Grip region 4a, 6a shown on the left, which is designed to grip the respective lever 4, 6, and one on the other side of the joint 8 (in FIGS Figures 1 to 3 right)) jaw area 4b, 6b, each for gripping one in the Figures 1 to 3 injector 30, not shown (see Figures 4 and 5 ) is trained.

Zwischen den Griffbereichen 4a, 6a der beiden Hebel 4, 6 ist ein elastisches Element 10, z.B. eine Feder, angeordnet, das die beiden Griffbereiche 4a, 6a auseinander drückt. Die Griffbereiche 4a, 6a und die Backenbereiche 4b, 6b sind daher im unbetätigten Zustand der Zange 2 voneinander getrennt, wie es in den Figuren 1 bis 3 gezeigt ist.An elastic element 10, for example a spring, is arranged between the grip areas 4a, 6a of the two levers 4, 6 and presses the two grip areas 4a, 6a apart. The grip areas 4a, 6a and the jaw areas 4b, 6b are therefore separated from one another in the unactuated state of the pliers 2, as shown in FIGS Figures 1 to 3 is shown.

In den Backenbereichen 4b, 6b sind jeweils zwei als Ausnehmungen 12a, 12b ausgebildet. Die Begrenzungsflächen der Ausnehmungen 12a, 12b sind als Greif- bzw. Schneidflächen ausgebildet, die es ermöglichen, einen auf einem Injektor 30 montierten Dichtring 32 (siehe Figuren 4 und 5) zu greifen und von dem Injektor 30 zu entfernen.In the jaw regions 4b, 6b, two are each formed as recesses 12a, 12b. The boundary surfaces of the recesses 12a, 12b are designed as gripping or cutting surfaces, which make it possible to mount a sealing ring 32 mounted on an injector 30 (see Figures 4 and 5 ) to grip and remove from the injector 30.

An einem der beiden Backenbereiche 4b, 6b sind zwei Führungselemente 14, 16 ausgebildet. Die Führungselemente 14, 16 können insbesondere mit Hilfe von Schrauben 18 (siehe Figur 3) an dem Hebel 4 befestigt sein. In einem alternativen, in den Figuren nicht gezeigten Ausführungsbeispiel, können die Führungselemente 14, 16 integral mit dem Hebel 4 ausgebildet sein.Two guide elements 14, 16 are formed on one of the two jaw regions 4b, 6b. The guide elements 14, 16 can in particular with the aid of screws 18 (see Figure 3 ) be attached to the lever 4. In an alternative embodiment, not shown in the figures, the guide elements 14, 16 can be formed integrally with the lever 4.

Die beiden Führungselemente 14, 16 weisen als Vertiefungen ausgebildete Führungen 14a, 14b, 16a auf, die zur Aufnahme jeweils eines Bereiches eines Injektors 30 ausgebildet sind.The two guide elements 14, 16 have guides 14a, 14b, 16a designed as recesses, which are each designed to receive a region of an injector 30.

Die Vertiefungen 14a, 14b, 16a sind jeweils in Form eines halben Hohlzylinders (Hohlzylinderhalbschale) ausgebildet und ermöglichen es, jeweils einen zylindrischen Bereich 34 eines Injektors 30 aufzunehmen und in einer vorgegebenen Position zu halten.The depressions 14a, 14b, 16a are each designed in the form of a half hollow cylinder (hollow cylinder half shell) and make it possible in each case to receive a cylindrical region 34 of an injector 30 and to hold it in a predetermined position.

Um die Position des Injektors 30 auch in dessen Axialrichtung (senkrecht zur Zeichenebene der Figur 1) festzulegen, sind die Führungselemente 14, 16 mit Anschlägen 20, 22 ausgebildet, an denen der Injektor 30 in Axialrichtung anliegt, wenn er in der korrekten Position in der jeweiligen Führung / Vertiefung 14a, 14b, 16a angeordnet ist.To the position of the injector 30 in its axial direction (perpendicular to the plane of the Figure 1 ) to be defined, the guide elements 14, 16 are formed with stops 20, 22 against which the injector 30 bears in the axial direction when it is arranged in the correct position in the respective guide / recess 14a, 14b, 16a.

Insbesondere weist das in den Figuren 1 und 3 dem Betrachter zugewandte Führungselement 16 am Ende der Ausnehmung 16a einen Anschlag 20 auf, an dem die Spitze eines in die Vertiefungen 14a, 16a eingelegten Injektors 30 anschlägt.In particular, this shows in the Figures 1 and 3rd the guide element 16 facing the viewer has at the end of the recess 16a a stop 20 against which the tip of an injector 30 inserted into the recesses 14a, 16a strikes.

Das andere Führungselement 14 weist eine Anschlagfläche 22 auf (siehe Figur 2), an der ein Spulenkörper 36 des Injektors 30 zum Anschlag kommt, wenn der Injektor 30 in die zweiten Vertiefung 14b eingelegt ist (siehe Fig. 4).The other guide element 14 has a stop surface 22 (see Figure 2 ), on which a bobbin 36 of the injector 30 comes to a stop when the injector 30 is inserted into the second recess 14b (see Fig. 4 ).

Jede Kombination aus Vertiefungen 12a, 14a, 16a bzw. 12b, 14b und Anschläge 20, 22 ist jeweils auf einen anderen Injektortyp ausgelegt. Die in den Figuren gezeigte Zange 2 ermöglicht es daher, Dichtringe 32 von wenigstens zwei verschiedenen Injektortypen zu entfernen.Each combination of depressions 12a, 14a, 16a or 12b, 14b and stops 20, 22 is designed for a different injector type. The one in the figures Pliers 2 shown therefore make it possible to remove sealing rings 32 from at least two different injector types.

Figur 4 zeigt einen Injektor 30, der in die ersten Führungen / Vertiefungen 14a, 16a der Zange 2 eingelegt ist. Das in der Figur 4 links dargestellte Ende des Injektors 30 liegt an dem Anschlag 20 an, so dass die Position des Injektors 30 gegenüber der Zange 2 sowohl in radialer als auch in axialer Richtung festgelegt ist. Figure 4 shows an injector 30 which is inserted into the first guides / depressions 14a, 16a of the pliers 2. That in the Figure 4 The end of the injector 30 shown on the left abuts the stop 20, so that the position of the injector 30 relative to the pliers 2 is fixed both in the radial and in the axial direction.

Wie in der Figur 4 ersichtlich, tritt die an der Ausnehmung 12a des gegenüberliegenden Backenbereichs 4b ausgebildete Greif- / Schneidfläche beim Schließen der Zange 2 nur in Kontakt mit dem auf den zylindrischen Bereich 34 des Injektors 30 aufgebrachten Dichtring 32, berührt aber nicht den zylindrischen Bereich 34 des Injektors 30.Like in the Figure 4 As can be seen, the gripping / cutting surface formed on the recess 12a of the opposing jaw region 4b only comes into contact with the sealing ring 32 applied to the cylindrical region 34 of the injector 30 when the pliers 2 are closed, but does not touch the cylindrical region 34 of the injector 30.

Eine Beschädigung des Injektors 30, insbesondere des zylindrischen Bereichs 34 des Injektors 30, durch die Greif- / Schneidflächen der Zange 2 wird so zuverlässig vermieden.Damage to the injector 30, in particular the cylindrical region 34 of the injector 30, by the gripping / cutting surfaces of the pliers 2 is thus reliably avoided.

Figur 5 zeigt einen Injektor 30, der in die zweite Führung / Vertiefung 14b eingelegt ist. In diesem Fall ist die Position des Injektors 30 in seiner Axialrichtung nicht durch einen Anschlag an der Spitze des Injektors 30 festgelegt. Stattdessen schlägt ein Spulenkörper 36 des Injektors 30 an einer Anschlagfläche 22 (siehe Figur 2) an, die an dem ersten Führungselement 14 ausgebildet ist. Dadurch ist die Position des Injektors 30 und insbesondere des auf den zylindrischen Bereichs 34 des Injektors 30 aufgebrachten Dichtringes 32 in der Axialrichtung des Injektors 30 definiert. Figure 5 shows an injector 30 which is inserted into the second guide / recess 14b. In this case, the position of the injector 30 in its axial direction is not determined by a stop at the tip of the injector 30. Instead, a coil former 36 of the injector 30 strikes a stop surface 22 (see Figure 2 ), which is formed on the first guide element 14. The position of the injector 30 and in particular of the sealing ring 32 applied to the cylindrical region 34 of the injector 30 is thereby defined in the axial direction of the injector 30.

Auch in diesem Fall tritt die an der Ausnehmung 12b im Backenbereich 4b der Zange 2 ausgebildete Greif- / Schneidfläche beim Schließen der Zange 2 nur in Kontakt mit dem Dichtring 32, nicht aber mit dem zylindrischen Bereich 34 des Injektors 30, so dass auch hier eine Beschädigung des Injektors 30 durch die Greif-/Schneidflächen der Zange 2 zuverlässig vermieden wird.In this case too, the gripping / cutting surface formed on the recess 12b in the jaw region 4b of the pliers 2 only comes into contact with the sealing ring 32 when the pliers 2 are closed, but not with the cylindrical region 34 of the injector 30, so that here too Damage to the injector 30 by the gripping / cutting surfaces of the pliers 2 is reliably avoided.

Eine Zange 2 gemäß einem Ausführungsbeispiel der Erfindung ermöglicht es daher, auf einen Injektor 30 aufgebrachte Dichtringe 32 tangential einzuritzen und einfach zu entfernen, ohne dass die Gefahr besteht, dass der Injektor 30 beim Entfernen des Dichtringes 32 beschädigt wird.A pair of pliers 2 according to one embodiment of the invention therefore makes it possible to tangentially seal seals 32 applied to an injector 30 and to remove them easily without the risk of injector 30 being damaged when the sealing ring 32 is removed.

Claims (9)

  1. Device, in particular a set of pliers (2), for removing a sealing (32) from an injector (30), having:
    two levers (4, 6), which are connected to one another in a pivotable manner,
    wherein each of the two levers (4, 6) has formed on it at least one contact surface for gripping a sealing ring (32) mounted on an injector (30); and
    wherein at least one of the two levers (4, 6) has at least one guide element (14, 16), which is designed to guide the injector (30) such that a sealing ring (32) mounted on the injector (30) is positioned opposite the contact surfaces of the device (2),
    characterized in that the at least one guide element (14, 16) has a stop (20), which limits the movement capability of the injector (30) in the axial direction thereof.
  2. Device (2) according to Claim 1, wherein the at least one guide element (14, 16) has at least one guide (14a, 14b, 16a), which is designed to accommodate the injection (30).
  3. Device (2) according to Claim 2, wherein the at least one guide (14a, 14b, 16a) is designed in the form of a hollow-cylinder half.
  4. Device (2) according to one of the preceding claims, wherein a respective guide element (14, 16) is arranged on two opposite sides of the at least one lever (4, 6).
  5. Device (2) according to one of the preceding claims, wherein at least two contact surfaces are formed on each lever (4, 6), and wherein the at least one guide element (14, 16) has a first guide (14a, 16a) and at least one second guide (14b), wherein the first and the second guides (14a, 14b, 16a) are designed such that the sealing ring (32) was positioned opposite the first contact surface when the injector (30) is arranged in the first guide (14a, 16a), and such that the sealing ring (32) is positioned opposite the second contact surface when the injector (30) is arranged in the second guide (14b).
  6. Device (2) according to one of Claims 1 to 5, wherein the at least one guide element (14, 16) is formed integrally with the at least one lever (4, 6) .
  7. Device (2) according to one of Claims 1 to 5, wherein the at least one guide element (14, 16) is fitted on the at least one lever (4, 6) in a releasable manner.
  8. Device (2) according to one of the preceding claims, wherein the levers (4, 6) are in the form of stamped parts.
  9. Device (2) according to one of the preceding claims, having an elastic element (10) which is designed to move the levers (4, 6) into a predetermined position.
EP18200371.5A 2017-12-07 2018-10-15 Device for removing a sealing ring of an injector Active EP3505300B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017222173.9A DE102017222173A1 (en) 2017-12-07 2017-12-07 Device for removing a sealing ring from an injector

Publications (2)

Publication Number Publication Date
EP3505300A1 EP3505300A1 (en) 2019-07-03
EP3505300B1 true EP3505300B1 (en) 2020-07-08

Family

ID=63857804

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18200371.5A Active EP3505300B1 (en) 2017-12-07 2018-10-15 Device for removing a sealing ring of an injector

Country Status (2)

Country Link
EP (1) EP3505300B1 (en)
DE (1) DE102017222173A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1936981A (en) * 1932-10-11 1933-11-28 Albert M Houghton Packing placement tool
US3884100A (en) * 1973-07-12 1975-05-20 William C Fideldy Pipe tongs
US5014578A (en) * 1990-01-08 1991-05-14 Flentge Melvin L Pipe tongs
US6389937B1 (en) * 2001-06-19 2002-05-21 Hsin-Fa Kang Universal grip pliers
TWM310084U (en) * 2006-08-21 2007-04-21 Auto Skill Ind Co Ltd Pipe fastener dismounting pliers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3505300A1 (en) 2019-07-03
DE102017222173A1 (en) 2019-06-13

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