EP3784444B1 - Measuring instrument - Google Patents

Measuring instrument Download PDF

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Publication number
EP3784444B1
EP3784444B1 EP19720039.7A EP19720039A EP3784444B1 EP 3784444 B1 EP3784444 B1 EP 3784444B1 EP 19720039 A EP19720039 A EP 19720039A EP 3784444 B1 EP3784444 B1 EP 3784444B1
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EP
European Patent Office
Prior art keywords
measuring instrument
push tube
groove
retaining ring
region
Prior art date
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EP19720039.7A
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German (de)
French (fr)
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EP3784444A1 (en
Inventor
Marcel Peltrie
Philipp Kraft
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.)
Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of EP3784444A1 publication Critical patent/EP3784444A1/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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/20—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same inserting or withdrawing split pins or circlips

Definitions

  • the invention relates to a measuring tool for circlips. Furthermore, the invention relates to a method for operating such a measuring tool and the use of such a measuring tool.
  • circlips are used to fix components.
  • An example retaining ring is in DE 10 2015 209 320 A1 disclosed.
  • the retaining ring In order to ensure that the component is fixed in place, the retaining ring must adhere to certain dimensions and be placed in the groove provided for this purpose. Compliance with the dimensions of the circlip, i.e. the tolerance ranges of the circlip, are usually checked using a static gauge. However, following the dimensions of the circlip does not guarantee that the circlip will sit correctly in the groove. This requires an additional work step. The correct position of the circlip in the groove is usually ensured by radial re-pressing.
  • the DE20 2008 001009 U1 describes a tool set for fixing a snap ring in a circumferential groove provided on the shaft of an injector.
  • the DE 38 27 070 A1 discloses a pressure-tight connection between a solenoid valve and a fuel injection pump. An assembly tool is used to insert a snap ring.
  • the object of the present invention is to provide a measuring tool that simply and efficiently reads the locking ring and ensures the correct position in the groove.
  • the measuring tool specified in claim 1 for gauging and pressing in a retaining ring is specified in claim 5
  • Method for gauging and pressing in a circlip with such a measuring tool and in claim 7 the use of such a measuring tool is proposed.
  • Optional advantageous refinements of the invention result entirely or partially from the dependent claims.
  • the measuring tool according to the invention for gauging and pressing a locking ring into a groove has a thrust tube with a flange area, a cone area and a middle area, the middle area connecting the flange area to the cone area.
  • a segmented pressure ring with an inner peripheral surface corresponding to the cone area of the push tube is arranged on the outer circumference of the cone area of the push tube.
  • the segmented pressure ring is in operative contact with the flange area of the push tube via a spring arrangement arranged on the outer circumference of the central area of the push tube.
  • the outer peripheral surface of the segmented pressure ring serves as a gauge and as a press-in part.
  • the circlips are circlips that are inserted into a radially outer groove. This means that the measuring tool must be inserted radially inside the circlips to be gauged and pressed in.
  • the flange area of the thrust tube is to be understood as meaning the area in which a radially outwardly extending flange is applied to the outer circumference of the thrust tube.
  • the flange can be segmented here.
  • the flange area of the thrust tube, that is to say the flange and the thrust tube, is preferably designed in one piece.
  • the pressure ring is preferably divided into a plurality of segments in the circumferential direction, so that each segment forms an arc of a circle.
  • the pressure ring is divided into three identically designed segments.
  • the spring arrangement comprises a plurality of spring elements in the form of compression springs.
  • a guide pin is arranged within each compression spring and is inserted into a bore in the pressure ring and into a through bore in the flange area of the thrust tube.
  • the flange of the flange area of the thrust tube preferably has a plurality of axially running through bores.
  • the segmented pressure ring preferably has a plurality of blind holes.
  • the guide pins serve as guides for the compression springs.
  • each segment of the pressure ring is guided by means of two guide pins.
  • each segment of the pressure ring has two blind holes, in each of which a guide pin is inserted, with the guide pin being surrounded by a compression spring.
  • the guide pin protrudes into the continuous bore of the flange of the flange area of the thrust tube.
  • the compression spring rests against the flange area of the thrust tube.
  • the segmented pressure ring represents the gauge for the locking ring.
  • the gauge is thus projected into the visible area for the fitter using mechanical elements, such as the guide pins here, for example.
  • the guide pins are provided as marking elements.
  • the guide pins have, for example, a marking, such as a notch or a colored marking, or represent the marking themselves by protruding from the through hole.
  • the circlip is not correctly seated in the groove if, for example, the guide pins or the markings on the guide pins protrude from the continuous bores in the flange of the torque tube.
  • the guide pins preferably have several functions. On the one hand, they serve as marking elements that project an incorrect fit or an inner diameter of the retaining ring that is outside the tolerance range into the field of view of the fitter. On the other hand, the guide pins ensure that the compression springs are guided.
  • an intermediate disk is arranged axially between the spring arrangement and the segmented pressure ring.
  • the Intermediate Pane ensures the even force distribution of the pressure springs on the segmented pressure ring.
  • a retaining ring is preferably arranged at the end of the cone region of the thrust tube, axially between the end face of the thrust tube and the inner peripheral surface of the segmented pressure ring that is in contact with the thrust tube.
  • the retaining ring is inserted here in a circumferential groove on the thrust tube. The retaining ring prevents the segmented pressure ring from slipping off the thrust tube.
  • the method according to the invention for gauging and pressing a retaining ring into a groove in a housing using a measuring tool according to the invention as described above is characterized in that the measuring tool is pushed axially into the housing with the cone area of the thrust tube in front, so that based on a marking on the measuring tool it is determined whether the retaining ring is correctly positioned in the groove.
  • the segmented thrust ring would strike the snap ring, causing the guide pins to move axially outward.
  • the fitter can use the mark on the guide pins to determine that the circlip has not been inserted correctly. If, on the other hand, the circlip is correctly seated in the groove, the segmented pressure ring only strikes the component to be secured with the circlip. The correct seating of the circlip in the groove can thus be determined by means of the guide pins.
  • the pressing and subsequent pressing of the retaining ring into the groove is preferably controlled by an axially acting force on the measuring tool.
  • the segmented pressure ring rests against the face of the component secured by the circlip.
  • a further axially acting force on the torque tube pushes the torque tube further axially into the housing, with the compression springs being compressed and the segmented pressure ring being moved radially outwards due to the cone region of the torque tube.
  • the outer peripheral surface of the segmented The pressure ring rests against the inner peripheral surface of the retaining ring and is pressed further into the groove by the force acting axially on the push tube. Pressing in and post-pressing can be controlled via the axial force to be applied by the fitter.
  • the measuring tool is used to gauge and press a circlip into a groove, with the circlip fixing a ring gear of a planetary gear.
  • a circlip into a groove
  • the circlip fixing a ring gear of a planetary gear.
  • an exemplary planetary gear is described.
  • FIG. 1 to 3 an exemplary embodiment of a measuring tool 1 according to the invention is shown in different views.
  • the measuring tool 1 is used to gauge and press in and/or repress a retaining ring, not shown here.
  • the measuring tool 1 has a thrust tube 2 with several differently designed areas.
  • a flange area 4 is formed at a first end 3 of the thrust tube 2 .
  • the flange area 4 has the thrust tube 2 , from which a flange 5 extends radially outwards.
  • the flange 5 is circumferential.
  • a central area 7 and a cone area 8 adjoin the flange area 4 of the torque tube 2 .
  • the outer circumference 9 of the cone area 8 of the torque tube 2 runs conically, so that the outside diameter becomes smaller in the axial direction towards the end face of the torque tube, which adjoins the cone area 8 .
  • a segmented pressure ring 10 is arranged on the outer circumference of the cone area 8 of the thrust tube 2 .
  • the segmented pressure ring 10 is divided into three identically designed segments 11 in the circumferential direction. This means that the segments 11 each represent an arc of a circle.
  • the segmented pressure ring 10 has an inner peripheral surface 12 that corresponds to the conical outer circumference 9 of the cone region 8 of the thrust tube 2 . Through the also conical running Inner peripheral surface 12 of the segmented pressure ring 10 allows movement of the segmented pressure ring 10 in both the axial and radial directions.
  • Each segment 11 of the segmented pressure ring 10 has two blind holes 13 in the end face facing the flange area 4 of the thrust tube 2 .
  • a guide pin 14 is arranged in each blind hole 13 and extends into the through holes 6 of the flange 5 of the flange area 4 of the push tube 2 .
  • Each guide pin 14 is surrounded by a compression spring 15 which allows the segmented pressure ring 10 to be prestressed and reset.
  • the compression springs 15 rest against the flange 5 of the flange area 4 of the thrust tube 2 .
  • An intermediate disc 16 is arranged axially between the compression springs 15 and the segmented pressure ring 10 . The intermediate disc 16 ensures the even pressure distribution of the compression springs 15 on the segments 11 of the pressure ring 10 .
  • the central area 7 of the thrust tube is cylindrical in this embodiment and, like the guide pins 14, serves as a guide for the compression springs 15.
  • the guide pins 14 are designed as marking elements, in that a colored marking (not shown here) is present on each of the guide pins 14 .
  • a retaining ring 18 is inserted in a groove 19 arranged all around the outer circumference 9 of the thrust tube 2 .
  • the locking ring 18 serves to prevent the segmented pressure ring 10 from slipping off.
  • FIGs 4 to 8 are the steps of the method according to the invention for teaching and pressing in a locking ring 20 for fixing a component in a housing 21 by means of a measuring tool 1 according to the invention Figures 1 to 3 shown.
  • This is a ring gear 22 of a planetary gear, not shown here, which is fixed in the housing 21 by means of the retaining ring 20 .
  • a groove 23 is provided on the inner circumference of the housing 21 , which rests directly axially on the ring gear 22 . In this groove 23 , the locking ring 20 is introduced.
  • the measuring tool 1 As shown in 4 shown pushed axially into the housing 21 with the cone portion 8 of the thrust tube 2 ahead.
  • the locking ring 20 is taught here by the segmented pressure ring 10 .
  • the retaining ring 20 rests on the outer peripheral surface 24 of the segmented pressure ring 10 , so that, as in figure 5 shown, the thrust tube 2 can be inserted up to the end face of the ring gear 22 .
  • the segmented pressure ring 10 remains in the axial direction while the compression spring 15 is compressed.
  • the conical surfaces of the thrust tube 2 and the segmented pressure ring 10 are according to 7 the segments 11 of the pressure ring 10 are moved radially outwards, so that the segments 11 of the pressure ring 10 press the locking ring 20 further into the groove 23 .
  • This means that the axial movement of the thrust tube 2 is converted into a radial movement of the segmented pressure ring 10 .
  • the pressing and/or subsequent pressing of the retaining ring 20 into the groove 23 of the housing 21 can be controlled using the force acting axially on the torque tube 2 .
  • the guide pins 14 protrude slightly from the bores 6 of the flange 5 of the thrust tube 2 at the front. The guide pins 14 do not protrude so far out of the bores 6 that the markings on the guide pins 14 can be seen.
  • the thrust tube 2 is pulled out of the housing 21 axially. Due to the axial movement of the thrust tube 2 , the pressure spring 15 relaxes, as a result of which the segmented pressure ring 10 is moved radially inwards. This means that the segmented pressure ring 10 is brought into its starting position, so that the pressure ring 10 is no longer pressed against the retaining ring 20 . This allows the measuring tool 1 to be pulled out of the housing 21 .
  • the push tube 2 will already hit the circlip 20 while the measuring tool 1 is being inserted into the housing 21 , see above that at the time provided introduced axial length of the push tube 2 , the segmented pressure ring 10 remains axially while the compression springs 15 are compressed and the guide pins 14 protrude from the through hole 6 of the flange 5 of the flange 4 of the push tube 2 . The markings on the guide pins 14 would thus protrude from the flange 5 of the thrust tube 2 . If this is the case, the locking ring 20 should be replaced and the method of the invention repeated.

Description

Die Erfindung betrifft ein Messwerkzeug für Sicherungsringe. Des Weiteren betrifft die Erfindung ein Verfahren zum Bedienen eines solchen Messwerkzeugs sowie die Verwendung eines solchen Messwerkzeugs.The invention relates to a measuring tool for circlips. Furthermore, the invention relates to a method for operating such a measuring tool and the use of such a measuring tool.

In der Regel werden Sicherungsringe zum Fixieren von Bauteilen verwendet. Ein beispielhafter Sicherungsring ist in der DE 10 2015 209 320 A1 offenbart. Um die Fixierung des Bauteils sicherzustellen, muss der Sicherungsring bestimmte Maße einhalten sowie in die dafür vorgesehene Nut eingebracht sein. Die Einhaltung der Maße des Sicherungsrings, das heißt die Toleranzbereiche des Sicherungsrings, werden üblicherweise über eine statische Lehre geprüft. Allerdings wird durch die Einhaltung der Maße des Sicherungsrings nicht gewährleistet, dass der Sicherungsring in der Nut korrekt sitzt. Hierfür wird ein zusätzlicher Arbeitsschritt notwendig. Die korrekte Position des Sicherungsrings in der Nut wird in der Regel mittels radiales Nachpressen sichergestellt.As a rule, circlips are used to fix components. An example retaining ring is in DE 10 2015 209 320 A1 disclosed. In order to ensure that the component is fixed in place, the retaining ring must adhere to certain dimensions and be placed in the groove provided for this purpose. Compliance with the dimensions of the circlip, i.e. the tolerance ranges of the circlip, are usually checked using a static gauge. However, following the dimensions of the circlip does not guarantee that the circlip will sit correctly in the groove. This requires an additional work step. The correct position of the circlip in the groove is usually ensured by radial re-pressing.

Die DE20 2008 001009 U1 beschreibt ein Werkzeugset zum Fixieren eines Sprengrings in einer am Schaft eines Injektors vorgesehenen Umfangsnut.the DE20 2008 001009 U1 describes a tool set for fixing a snap ring in a circumferential groove provided on the shaft of an injector.

Die DE 38 27 070 A1 offenbart eine druckdichte Anschlussverbindung zwischen einem Magnetventil und einer Kraftstoffeinspritzpumpe. Zum Einbringen eine Sprengringes wird ein Montagewerkzeug eingesetzt.the DE 38 27 070 A1 discloses a pressure-tight connection between a solenoid valve and a fuel injection pump. An assembly tool is used to insert a snap ring.

Aufgabe der vorliegenden Erfindung ist es, ein Messwerkzeug aufzuzeigen, das einfach und rationell den Sicherungsring ablehrt sowie die richtige Position in der Nut sicherstellt.The object of the present invention is to provide a measuring tool that simply and efficiently reads the locking ring and ensures the correct position in the groove.

Zur Lösung der erfindungsgemäßen Aufgabe wird das im Anspruch 1 angegebene Messwerkzeug zum Lehren und Einpressen eines Sicherungsrings, in Anspruch 5 ein Verfahren zum Lehren und Einpressen eines Sicherungsrings mit einem solchen Messwerkzeug und in Anspruch 7 die Verwendung eines solchen Messwerkzeugs vorgeschlagen. Optionale vorteilhafte Ausgestaltungen der Erfindung ergeben sich ganz oder teilweise aus den abhängigen Ansprüchen.To achieve the object according to the invention, the measuring tool specified in claim 1 for gauging and pressing in a retaining ring is specified in claim 5 Method for gauging and pressing in a circlip with such a measuring tool and in claim 7 the use of such a measuring tool is proposed. Optional advantageous refinements of the invention result entirely or partially from the dependent claims.

Das erfindungsgemäße Messwerkzeug zum Lehren und Einpressen eines Sicherungsrings in eine dafür vorgesehene Nut weist ein Schubrohr mit einem Flanschbereich, einem Konusbereich und einem Mittelbereich auf, wobei der Mittelbereich den Flanschbereich mit dem Konusbereich verbindet. Dabei ist auf dem Außenumfang des Konusbereichs des Schubrohrs ein segmentierter Druckring mit einer mit dem Konusbereich des Schubrohrs korrespondierenden Innenumfangsfläche angeordnet. Der segmentierte Druckring steht über eine am Außenumfang des Mittelbereichs des Schubrohrs angeordnete Federanordnung in Wirkkontakt mit dem Flanschbereich des Schubrohrs. Erfindungsgemäß dient die Außenumfangsfläche des segmentierten Druckrings als Lehre sowie als Einpressteil.The measuring tool according to the invention for gauging and pressing a locking ring into a groove provided for this purpose has a thrust tube with a flange area, a cone area and a middle area, the middle area connecting the flange area to the cone area. A segmented pressure ring with an inner peripheral surface corresponding to the cone area of the push tube is arranged on the outer circumference of the cone area of the push tube. The segmented pressure ring is in operative contact with the flange area of the push tube via a spring arrangement arranged on the outer circumference of the central area of the push tube. According to the invention, the outer peripheral surface of the segmented pressure ring serves as a gauge and as a press-in part.

Bei den Sicherungsringen handelt es sich um Sicherungsringe, die in eine radial außenliegende Nut eingebracht werden. Das bedeutet, dass das Messwerkzeug radial innerhalb der zu lehrenden und einzupressenden Sicherungsringe einzubringen ist.The circlips are circlips that are inserted into a radially outer groove. This means that the measuring tool must be inserted radially inside the circlips to be gauged and pressed in.

Unter Flanschbereich des Schubrohrs ist der Bereich zu verstehen, bei dem auf dem Außenumfang des Schubrohrs ein sich radial nach außen erstreckender Flansch aufgebracht ist. Der Flansch kann hierbei segmentiert sein. Vorzugsweise ist der Flanschbereich des Schubrohrs, das heißt der Flansch und das Schubrohr, einteilig ausgebildet.The flange area of the thrust tube is to be understood as meaning the area in which a radially outwardly extending flange is applied to the outer circumference of the thrust tube. The flange can be segmented here. The flange area of the thrust tube, that is to say the flange and the thrust tube, is preferably designed in one piece.

Der Druckring ist vorzugsweise in mehrere Segmente in Umfangsrichtung unterteilt, so dass jedes Segment einen Kreisbogen bildet. In einer vorteilhaften Ausführungsform ist der Druckring in drei identisch ausgebildete Segmente unterteilt.The pressure ring is preferably divided into a plurality of segments in the circumferential direction, so that each segment forms an arc of a circle. In an advantageous embodiment, the pressure ring is divided into three identically designed segments.

Ferner umfasst die Federanordnung mehrere Federelemente in Form von Druckfedern. Das bedeutet, dass vorzugsweise mehrere Druckfedern in Wirkkontakt mit dem Flanschbereich des Schubrohrs sowie mit dem segmentierten Druckring stehen. Erfindungsgemäß ist innerhalb einer jeden Druckfeder ein Führungsstift angeordnet, der jeweils in eine Bohrung des Druckrings sowie in eine durchgehende Bohrung des Flanschbereichs des Schubrohrs eingelegt ist. Das heißt, dass vorzugsweise der Flansch des Flanschbereichs des Schubrohrs mehrere axial verlaufende durchgehende Bohrungen aufweist. Ferner weist vorzugsweise der segmentierte Druckring mehrere Sacklochbohrungen auf. Die Führungsstifte dienen als Führung für die Druckfedern.Furthermore, the spring arrangement comprises a plurality of spring elements in the form of compression springs. This means that preferably several compression springs are in active contact with the flange area of the thrust tube and with the segmented pressure ring. According to the invention, a guide pin is arranged within each compression spring and is inserted into a bore in the pressure ring and into a through bore in the flange area of the thrust tube. This means that the flange of the flange area of the thrust tube preferably has a plurality of axially running through bores. Furthermore, the segmented pressure ring preferably has a plurality of blind holes. The guide pins serve as guides for the compression springs.

In einer vorteilhaften Ausführungsform ist jedes Segment des Druckrings mittels zwei Führungsstiften geführt. Das bedeutet, dass jedes Segment des Druckrings zwei Sacklochbohrungen aufweist, in die jeweils ein Führungsstift eingelegt ist, wobei der Führungsstift von einer Druckfeder umgeben ist. Der Führungsstift ragt bis in die durchgehende Bohrung des Flansches des Flanschbereichs des Schubrohrs hinein. Die Druckfeder hingegen liegt am Flanschbereich des Schubrohrs an.In an advantageous embodiment, each segment of the pressure ring is guided by means of two guide pins. This means that each segment of the pressure ring has two blind holes, in each of which a guide pin is inserted, with the guide pin being surrounded by a compression spring. The guide pin protrudes into the continuous bore of the flange of the flange area of the thrust tube. The compression spring, on the other hand, rests against the flange area of the thrust tube.

Der segmentierte Druckring stellt die Lehre für den Sicherungsring dar. Das Lehren wird somit anhand von mechanischen Elementen, wie hier beispielsweise mittels der Führungsstifte, in den sichtbaren Bereich für den Monteur projiziert. Erfindungsgemäß sind die Führungsstifte als Markierungselemente vorgesehen. Die Führungsstifte weisen beispielsweise eine Markierung, wie zum Beispiel eine Einkerbung oder eine farbliche Markierung, auf oder stellen selbst die Markierung dar, indem sie aus der durchgehenden Bohrung herausragen. Der Sicherungsring sitzt nicht richtig in der Nut, wenn beispielsweise die Führungsstifte oder die Markierung der Führungsstifte aus den durchgehenden Bohrungen des Flansches des Schubrohrs herausragen.The segmented pressure ring represents the gauge for the locking ring. The gauge is thus projected into the visible area for the fitter using mechanical elements, such as the guide pins here, for example. According to the invention, the guide pins are provided as marking elements. The guide pins have, for example, a marking, such as a notch or a colored marking, or represent the marking themselves by protruding from the through hole. The circlip is not correctly seated in the groove if, for example, the guide pins or the markings on the guide pins protrude from the continuous bores in the flange of the torque tube.

Demnach weisen die Führungsstifte vorzugsweise mehrere Funktionen auf. Zum einen dienen sie als Markierungselemente, die einen inkorrekten Sitz oder einen außerhalb des Toleranzbereiches liegenden Innendurchmesser des Sicherungsrings in den Sichtbereich des Monteurs projizieren. Zum anderen stellen die Führungsstifte die Führung der Druckfedern sicher.Accordingly, the guide pins preferably have several functions. On the one hand, they serve as marking elements that project an incorrect fit or an inner diameter of the retaining ring that is outside the tolerance range into the field of view of the fitter. On the other hand, the guide pins ensure that the compression springs are guided.

In einer weiteren beispielhaften Ausführungsform ist axial zwischen der Federanordnung und dem segmentierten Druckring eine Zwischenscheibe angeordnet. Die Zwischenscheibe stellt hierbei die gleichmäßige Kraftverteilung der Druckfedern auf den segmentierten Druckring sicher.In a further exemplary embodiment, an intermediate disk is arranged axially between the spring arrangement and the segmented pressure ring. The Intermediate Pane ensures the even force distribution of the pressure springs on the segmented pressure ring.

Ferner ist vorzugsweise am Ende des Konusbereichs des Schubrohrs, axial zwischen Stirnseite des Schubrohrs und mit dem Schubrohr in Kontakt stehende Innenumfangsfläche des segmentierten Druckrings, ein Sicherungsring angeordnet. Der Sicherungsring ist hier in einer umlaufenden Nut am Schubrohr eingesetzt. Der Sicherungsring verhindert das Abrutschen des segmentierten Druckrings vom Schubrohr.Furthermore, a retaining ring is preferably arranged at the end of the cone region of the thrust tube, axially between the end face of the thrust tube and the inner peripheral surface of the segmented pressure ring that is in contact with the thrust tube. The retaining ring is inserted here in a circumferential groove on the thrust tube. The retaining ring prevents the segmented pressure ring from slipping off the thrust tube.

Das erfindungsgemäße Verfahren zum Lehren und Einpressen eines Sicherungsrings in eine Nut in einem Gehäuse mittels eines oben beschriebenen erfindungsmäßen Messwerkzeugs zeichnet sich dadurch aus, dass das Messwerkzeug mit dem Konusbereich des Schubrohrs voraus in das Gehäuse axial eingeschoben wird, so dass anhand von einer Markierung am Messwerkzeug festgestellt wird, ob der Sicherungsring in der Nut ordnungsgemäß angeordnet ist. Das bedeutet, dass durch das Hineinschieben des Messwerkzeugs in das Gehäuse der Sicherungsring gelehrt wird und sichergestellt wird, dass der Sicherungsring seine Toleranzbereiche einhält und in der Nut korrekt eingelegt ist.The method according to the invention for gauging and pressing a retaining ring into a groove in a housing using a measuring tool according to the invention as described above is characterized in that the measuring tool is pushed axially into the housing with the cone area of the thrust tube in front, so that based on a marking on the measuring tool it is determined whether the retaining ring is correctly positioned in the groove. This means that by pushing the measuring tool into the housing, the circlip is gauged and it is ensured that the circlip adheres to its tolerance ranges and is correctly inserted in the groove.

Wenn der Sicherungsring nicht korrekt in der Nut sitzen würde, dann würde der segmentierte Druckring am Sicherungsring anschlagen, wodurch die Führungsstifte axial nach außen bewegt werden. Anhand der Markierung an den Führungsstiften stellt der Monteur fest, dass der Sicherungsring nicht korrekt eingelegt ist. Wenn der Sicherungsring hingegen korrekt in der Nut sitzt, dann schlägt der segmentierte Druckring erst an dem mit dem Sicherungsring zu sichernden Bauteil an. Mittels der Führungsstifte kann somit der korrekte Sitz des Sicherungsrings in der Nut festgestellt werden.If the snap ring were not properly seated in the groove, the segmented thrust ring would strike the snap ring, causing the guide pins to move axially outward. The fitter can use the mark on the guide pins to determine that the circlip has not been inserted correctly. If, on the other hand, the circlip is correctly seated in the groove, the segmented pressure ring only strikes the component to be secured with the circlip. The correct seating of the circlip in the groove can thus be determined by means of the guide pins.

In einem weiteren Schritt wird vorzugsweise über eine axial wirkende Kraft auf das Messwerkzeug das Einpressen und Nachpressen des Sicherungsrings in die Nut gesteuert. Der segmentierte Druckring liegt an der Stirnseite des durch den Sicherungsring gesicherten Bauteils an. Durch eine weiter axial wirkende Kraft auf das Schubrohr wird das Schubrohr weiter axial in das Gehäuse eingeschoben, wobei die Druckfedern komprimiert werden und der segmentierte Druckring aufgrund des Konusbereichs des Schubrohrs radial nach außen bewegt wird. Die Außenumfangsfläche des segmentierten Druckrings liegt an der Innenumfangsfläche des Sicherungsrings an und wird durch die axial wirkende Kraft auf das Schubrohr weiter in die Nut gepresst. Über die aufzuwendende axiale Kraft des Monteurs kann das Einpressen und das Nachpressen gesteuert werden.In a further step, the pressing and subsequent pressing of the retaining ring into the groove is preferably controlled by an axially acting force on the measuring tool. The segmented pressure ring rests against the face of the component secured by the circlip. A further axially acting force on the torque tube pushes the torque tube further axially into the housing, with the compression springs being compressed and the segmented pressure ring being moved radially outwards due to the cone region of the torque tube. The outer peripheral surface of the segmented The pressure ring rests against the inner peripheral surface of the retaining ring and is pressed further into the groove by the force acting axially on the push tube. Pressing in and post-pressing can be controlled via the axial force to be applied by the fitter.

Erfindungsgemäß wird das Messwerkzeug zum Lehren und Einpressen eines Sicherungsrings in eine Nut verwendet, wobei der Sicherungsring ein Hohlrad eines Planetengetriebes fixiert. In der DE 101 44 803 A1 ist ein beispielhaftes Planetengetriebe beschrieben.According to the invention, the measuring tool is used to gauge and press a circlip into a groove, with the circlip fixing a ring gear of a planetary gear. In the DE 101 44 803 A1 an exemplary planetary gear is described.

Weitere Einzelheiten, Merkmale, Merkmalskombinationen und Wirkungen auf der Basis der Erfindung ergeben sich aus der nachfolgenden Beschreibung einer bevorzugten, beispielhaften Ausführungsform der Erfindung sowie aus den Zeichnungen. Diese zeigen in:

Figur 1
eine beispielhafte Ausführungsform eines erfindungsgemäßen Messwerkzeugs in Seitenansicht,
Figur 2
das Messwerkzeug aus Fig. 1 in perspektivischer Vorderansicht,
Figur 3
das Messwerkzeug aus Fig. 1 in perspektivischer Rückansicht,
Figur 4
der erste Verfahrensschritt zum Lehren und Einpressen eines Sicherungsrings in eine Nut mittels eines erfindungsgemäßen Messwerkzeugs in Schnittansicht,
Figur 5
der zweite Verfahrensschritt zum Lehren und Einpressen eines Sicherungsrings in eine Nut mittels eines erfindungsgemäßen Messwerkzeugs in Schnittansicht,
Figur 6
der dritte Verfahrensschritt zum Lehren und Einpressen eines Sicherungsrings in eine Nut mittels eines erfindungsgemäßen Messwerkzeugs in Schnittansicht,
Figur 7
der vierte Verfahrensschritt zum Lehren und Einpressen eines Sicherungsrings in eine Nut mittels eines erfindungsgemäßen Messwerkzeugs in Schnittansicht,
Figur 8
der fünfte Verfahrensschritt zum Lehren und Einpressen eines Sicherungsrings in eine Nut mittels eines erfindungsgemäßen Messwerkzeugs in Schnittansicht.
Further details, features, combinations of features and effects based on the invention result from the following description of a preferred exemplary embodiment of the invention and from the drawings. These show in:
figure 1
an exemplary embodiment of a measuring tool according to the invention in side view,
figure 2
the measuring tool 1 in perspective front view,
figure 3
the measuring tool 1 in perspective rear view,
figure 4
the first method step for teaching and pressing a locking ring into a groove using a measuring tool according to the invention in a sectional view,
figure 5
the second method step for teaching and pressing a locking ring into a groove using a measuring tool according to the invention in a sectional view,
figure 6
the third method step for teaching and pressing a locking ring into a groove using a measuring tool according to the invention in a sectional view,
figure 7
the fourth method step for teaching and pressing a locking ring into a groove using a measuring tool according to the invention in a sectional view,
figure 8
the fifth method step for teaching and pressing a locking ring into a groove using a measuring tool according to the invention in a sectional view.

In allen Figuren sind gleiche oder gleichwirkende Teile mit denselben Bezugszeichen versehen.In all figures, parts that are the same or have the same effect are provided with the same reference numbers.

In den Figuren 1 bis 3 ist eine beispielhafte Ausführungsform eines erfindungsgemäßen Messwerkzeugs 1 in unterschiedlichen Ansichten dargestellt. Das Messwerkzeug 1 dient zum Lehren und Einpressen und/oder Nachpressen eines hier nicht dargestellten Sicherungsrings. Das Messwerkzeug 1 weist ein Schubrohr 2 mit mehreren unterschiedlich ausgebildeten Bereichen auf. An einem ersten Ende 3 des Schubrohrs 2 ist ein Flanschbereich 4 ausgebildet. Der Flanschbereich 4 weist das Schubrohr 2 auf, von dem sich radial nach außen ein Flansch 5 erstreckt. Der Flansch 5 ist in dieser Ausführungsform umlaufend ausgebildet. In dem Flansch 5 des Flanschbereichs 4 sind mehrere durchgehende Bohrungen 6 vorhanden.In the Figures 1 to 3 an exemplary embodiment of a measuring tool 1 according to the invention is shown in different views. The measuring tool 1 is used to gauge and press in and/or repress a retaining ring, not shown here. The measuring tool 1 has a thrust tube 2 with several differently designed areas. A flange area 4 is formed at a first end 3 of the thrust tube 2 . The flange area 4 has the thrust tube 2 , from which a flange 5 extends radially outwards. In this embodiment, the flange 5 is circumferential. In the flange 5 of the flange area 4 there are several continuous bores 6 .

An dem Flanschbereich 4 des Schubrohrs 2 schließt in axialer Richtung ein Mittelbereich 7 und im Anschluss daran ein Konusbereich 8 an. Das bedeutet, dass der Mittelbereich 7 den Flanschbereich 4 mit dem Konusbereich 8 des Schubrohrs 2 verbindet. Der Außenumfang 9 des Konusbereichs 8 des Schubrohrs 2 verläuft dabei konisch, so dass der Außendurchmesser in axialer Richtung zur Stirnseite des Schubrohrs, die am Konusbereich 8 angrenzt, hin kleiner wird.In the axial direction, a central area 7 and a cone area 8 adjoin the flange area 4 of the torque tube 2 . This means that the central area 7 connects the flange area 4 to the cone area 8 of the torque tube 2 . The outer circumference 9 of the cone area 8 of the torque tube 2 runs conically, so that the outside diameter becomes smaller in the axial direction towards the end face of the torque tube, which adjoins the cone area 8 .

Auf dem Außenumfang des Konusbereichs 8 des Schubrohrs 2 ist ein segmentierter Druckring 10 angeordnet. Der segmentierte Druckring 10 ist in Umfangsrichtung in drei identisch ausgebildete Segmente 11 unterteilt. Das heißt, dass die Segmente 11 jeweils einen Kreisbogen darstellen. Der segmentierte Druckring 10 weist ein zum konisch verlaufenden Außenumfang 9 des Konusbereichs 8 des Schubrohrs 2 eine korrespondierende Innenumfangsfläche 12 auf. Durch die ebenfalls konisch verlaufende Innenumfangsfläche 12 des segmentierten Druckrings 10 wird eine Bewegung des segmentierten Druckrings 10 in axialer sowie in radialer Richtung ermöglicht.A segmented pressure ring 10 is arranged on the outer circumference of the cone area 8 of the thrust tube 2 . The segmented pressure ring 10 is divided into three identically designed segments 11 in the circumferential direction. This means that the segments 11 each represent an arc of a circle. The segmented pressure ring 10 has an inner peripheral surface 12 that corresponds to the conical outer circumference 9 of the cone region 8 of the thrust tube 2 . Through the also conical running Inner peripheral surface 12 of the segmented pressure ring 10 allows movement of the segmented pressure ring 10 in both the axial and radial directions.

Jedes Segment 11 des segmentierten Druckrings 10 weist jeweils zwei Sacklochbohrungen 13 in der zum Flanschbereich 4 des Schubrohrs 2 zugewandten Stirnseite auf. In jeder Sacklochbohrung 13 ist ein Führungsstift 14 angeordnet, der sich jeweils bis in die durchgehenden Bohrungen 6 des Flansches 5 des Flanschbereichs 4 des Schubrohrs 2 erstreckt. Jeder Führungsstift 14 ist von einer Druckfeder 15 umgeben, die eine Vorspannung sowie eine Rückstellung des segmentierten Druckrings 10 ermöglicht. Die Druckfedern 15 liegen am Flansch 5 des Flanschbereichs 4 des Schubrohrs 2 an. Axial zwischen den Druckfedern 15 und des segmentierten Druckrings 10 ist eine Zwischenscheibe 16 angeordnet. Die Zwischenscheibe 16 stellt die gleichmäßige Druckverteilung der Druckfedern 15 auf die Segmente 11 des Druckrings 10 sicher.Each segment 11 of the segmented pressure ring 10 has two blind holes 13 in the end face facing the flange area 4 of the thrust tube 2 . A guide pin 14 is arranged in each blind hole 13 and extends into the through holes 6 of the flange 5 of the flange area 4 of the push tube 2 . Each guide pin 14 is surrounded by a compression spring 15 which allows the segmented pressure ring 10 to be prestressed and reset. The compression springs 15 rest against the flange 5 of the flange area 4 of the thrust tube 2 . An intermediate disc 16 is arranged axially between the compression springs 15 and the segmented pressure ring 10 . The intermediate disc 16 ensures the even pressure distribution of the compression springs 15 on the segments 11 of the pressure ring 10 .

Der Mittelbereich 7 des Schubrohrs ist in dieser Ausführungsform zylindrisch ausgebildet und dient, wie auch die Führungsstifte 14, als Führung für die Druckfedern 15. Die Führungsstifte 14 sind als Markierungselemente ausgebildet, indem an den Führungsstiften 14 jeweils eine hier nicht dargestellte farbliche Markierung vorhanden ist.The central area 7 of the thrust tube is cylindrical in this embodiment and, like the guide pins 14, serves as a guide for the compression springs 15. The guide pins 14 are designed as marking elements, in that a colored marking (not shown here) is present on each of the guide pins 14 .

Am anderen Ende 17 des Schubrohrs 2 ist ein Sicherungsring 18 in einer am Außenumfang 9 des Schubrohrs 2 ringsumlaufend angeordneten Nut 19 eingebracht. Der Sicherungsring 18 dient als Abrutschsicherung für den segmentierten Druckring 10. At the other end 17 of the thrust tube 2 , a retaining ring 18 is inserted in a groove 19 arranged all around the outer circumference 9 of the thrust tube 2 . The locking ring 18 serves to prevent the segmented pressure ring 10 from slipping off.

In den Figuren 4 bis 8 sind die Schritte des erfindungsgemäßen Verfahrens zum Lehren und Einpressen eines Sicherungsrings 20 zum Fixieren eines Bauteils in einem Gehäuse 21 mittels eines erfindungsgemäßen Messwerkzeugs 1 nach den Figuren 1 bis 3 dargestellt. Es handelt sich hierbei um ein Hohlrad 22 eines hier nicht weiter dargestellten Planetengetriebes, das mittels des Sicherungsrings 20 in dem Gehäuse 21 fixiert wird. Hierfür ist am Innenumfang des Gehäuses 21 eine Nut 23 vorgesehen, die direkt axial an dem Hohlrad 22 anliegt. In dieser Nut 23 ist der Sicherungsring 20 eingebracht.In the Figures 4 to 8 are the steps of the method according to the invention for teaching and pressing in a locking ring 20 for fixing a component in a housing 21 by means of a measuring tool 1 according to the invention Figures 1 to 3 shown. This is a ring gear 22 of a planetary gear, not shown here, which is fixed in the housing 21 by means of the retaining ring 20 . For this purpose, a groove 23 is provided on the inner circumference of the housing 21 , which rests directly axially on the ring gear 22 . In this groove 23 , the locking ring 20 is introduced.

Um sicherzustellen, dass der eingelegte Sicherungsring 20 die Toleranzen einhält und korrekt in der Nut 23 sitzt, wird das Messwerkzeug 1, wie in Fig. 4 dargestellt, axial in das Gehäuse 21 mit dem Konusbereich 8 des Schubrohrs 2 voraus hineingeschoben. Der Sicherungsring 20 wird hierbei von dem segmentierten Druckring 10 gelehrt.In order to ensure that the inserted circlip 20 adheres to the tolerances and sits correctly in the groove 23 , the measuring tool 1, as shown in 4 shown pushed axially into the housing 21 with the cone portion 8 of the thrust tube 2 ahead. The locking ring 20 is taught here by the segmented pressure ring 10 .

Im Idealfall liegt der Sicherungsring 20 auf der Außenumfangsfläche 24 des segmentierten Druckrings 10 an, so dass sich, wie in Fig. 5 dargestellt, das Schubrohr 2 bis zur Stirnseite des Hohlrads 22 einschieben lässt.In the ideal case, the retaining ring 20 rests on the outer peripheral surface 24 of the segmented pressure ring 10 , so that, as in figure 5 shown, the thrust tube 2 can be inserted up to the end face of the ring gear 22 .

Beim weiteren axialen Einschieben des Schubrohrs 2 in das Gehäuse 21 gemäß Fig. 6 bleibt der segmentierte Druckring 10 in axialer Richtung stehen, während sich die Druckfeder 15 komprimiert. Durch die Konusflächen des Schubrohrs 2 und des segmentierten Druckrings 10 werden gemäß Fig. 7 die Segmente 11 des Druckrings 10 radial nach außen bewegt, so dass die Segmente 11 des Druckrings 10 den Sicherungsring 20 in die Nut 23 weiter einpressen. Das heißt, dass die axiale Bewegung des Schubrohrs 2 in eine radiale Bewegung des segmentierten Druckrings 10 umgewandelt wird. Das Einpressen und/oder Nachpressen des Sicherungsrings 20 in die Nut 23 des Gehäuses 21 kann anhand der axial auf das Schubrohr 2 wirkenden Kraft gesteuert werden. Die Führungsstifte 14 ragen hierbei stirnseitig leicht aus den Bohrungen 6 des Flanschs 5 des Schubrohrs 2 heraus. Dabei ragen die Führungsstifte 14 nicht soweit aus den Bohrungen 6 heraus, dass die Markierungen an den Führungsstiften 14 zu sehen sind.As the thrust tube 2 is pushed further axially into the housing 21 according to FIG 6 the segmented pressure ring 10 remains in the axial direction while the compression spring 15 is compressed. By the conical surfaces of the thrust tube 2 and the segmented pressure ring 10 are according to 7 the segments 11 of the pressure ring 10 are moved radially outwards, so that the segments 11 of the pressure ring 10 press the locking ring 20 further into the groove 23 . This means that the axial movement of the thrust tube 2 is converted into a radial movement of the segmented pressure ring 10 . The pressing and/or subsequent pressing of the retaining ring 20 into the groove 23 of the housing 21 can be controlled using the force acting axially on the torque tube 2 . The guide pins 14 protrude slightly from the bores 6 of the flange 5 of the thrust tube 2 at the front. The guide pins 14 do not protrude so far out of the bores 6 that the markings on the guide pins 14 can be seen.

Anschließend wird gemäß Fig. 8 das Schubrohr 2 aus dem Gehäuse 21 axial herausgezogen. Durch die axiale Bewegung des Schubrohrs 2 entspannt sich die Druckfeder 15, wodurch der segmentierte Druckring 10 radial nach innen bewegt wird. Das heißt, dass der segmentierte Druckring 10 in seine Ausgangsposition gebracht wird, so dass der Druckring 10 nicht mehr an den Sicherungsring 20 gepresst wird. Hierdurch kann das Messwerkzeug 1 aus dem Gehäuse 21 herausgezogen werden.Then according to 8 the thrust tube 2 is pulled out of the housing 21 axially. Due to the axial movement of the thrust tube 2 , the pressure spring 15 relaxes, as a result of which the segmented pressure ring 10 is moved radially inwards. This means that the segmented pressure ring 10 is brought into its starting position, so that the pressure ring 10 is no longer pressed against the retaining ring 20 . This allows the measuring tool 1 to be pulled out of the housing 21 .

Wenn der Sicherungsring 20 nicht korrekt in der Nut 23 sitzt oder seine Toleranzbereiche nicht einhält und somit nicht ordnungsgemäß in die Nut 23 eingebracht werden kann, dann schlägt während dem Einbringen des Messwerkzeugs 1 in das Gehäuse 21 das Schubrohr 2 bereits am Sicherungsring 20 an, so dass bei der vorgesehenen einzubringenden axialen Länge des Schubrohrs 2 der segmentierte Druckring 10 axial stehen bleibt, während die Druckfedern 15 zusammengedrückt werden und die Führungsstifte 14 aus der durchgehenden Bohrung 6 des Flansches 5 des Flanschbereichs 4 des Schubrohrs 2 herausragen. Die Markierungen an den Führungsstiften 14 würden somit aus dem Flansch 5 des Schubrohrs 2 herausragen. Wenn dies der Fall ist, sollte der Sicherungsring 20 ausgetauscht und das erfindungsgemäße Verfahren wiederholt werden.If the circlip 20 is not seated correctly in the groove 23 or does not comply with its tolerance ranges and therefore cannot be properly inserted into the groove 23 , then the push tube 2 will already hit the circlip 20 while the measuring tool 1 is being inserted into the housing 21 , see above that at the time provided introduced axial length of the push tube 2 , the segmented pressure ring 10 remains axially while the compression springs 15 are compressed and the guide pins 14 protrude from the through hole 6 of the flange 5 of the flange 4 of the push tube 2 . The markings on the guide pins 14 would thus protrude from the flange 5 of the thrust tube 2 . If this is the case, the locking ring 20 should be replaced and the method of the invention repeated.

BezugszeichenlisteReference List

11
Messwerkzeugmeasuring tool
22
Schubrohrthrust tube
33
erstes Ende des Schubrohrsfirst end of the thrust tube
44
Flanschbereichflange area
55
Flanschflange
66
durchgehende Bohrungthrough hole
77
Mittelbereichmidrange
88th
Konusbereichcone area
99
Außenumfang des SchubrohrsOuter circumference of the thrust tube
1010
segmentierter Druckringsegmented pressure ring
1111
Segment des Druckringssegment of the pressure ring
1212
Innenumfangsfläche des segmentierten DruckringsInner peripheral surface of the segmented pressure ring
1313
Sacklochbohrungblind hole
1414
Führungsstiftguide pin
1515
Druckfedercompression spring
1616
Zwischenscheibewasher
1717
zweites Ende des Schubrohrssecond end of the thrust tube
1818
Sicherungsringlocking ring
1919
Nutgroove
2020
Sicherungsring für zu fixierendes BauteilCirclip for component to be fixed
2121
GehäuseHousing
2222
Hohlradring gear
2323
Nutgroove
2424
Außenumfangsfläche des DruckringsOuter peripheral surface of the pressure ring

Claims (7)

  1. A measuring instrument (1) for gauging and inserting a retaining ring (20), comprising a push tube (2) having a flange region (4), a conical region (8) and a middle region (7), wherein the middle region (7) connects the flange region (4) to the conical region (8), wherein a segmented thrust collar (10) having an inner circumferential surface (12) corresponding to the conical region (8) of the push tube (2) is arranged on the outer circumference (9) of the conical region (8) of the push tube (2) and the segmented thrust collar (10) is in active contact with the flange region (4) of the push tube (2) by way of a spring arrangement arranged on the outer circumference of the middle region (7) of the push tube (2), wherein the outer circumference surface (24) of the segmented thrust collar (10) is used as a gauge and as a press-in part, wherein the spring arrangement comprises a plurality of compression springs (15), wherein a guide pin (14) is arranged inside each compression spring (15) and is inserted in each case in a bore (13) of the thrust collar (10) and in a through bore (6) in the flange region (4) of the push tube (2), and wherein the guide pins (14) are provided as marking elements.
  2. The measuring instrument (1) according to claim 1, characterised in that the thrust collar (10) subdivided split into three identically designed segments (11).
  3. The measuring instrument (1) according to any one of the preceding claims, characterised in that each segment (11) of the thrust collar (10) is guided by means of two guide pins (14).
  4. The measuring instrument (1) according to any one of the preceding claims, characterised in that a retaining ring (18) is arranged at the end (17) of the conical region (8) of the push tube (2), axially between the end face of the push tube (2) and the inner circumferential surface (12), which is in contact with the push tube (2), of the segmented thrust collar (10).
  5. A method for gauging and inserting a retaining ring (20) into a groove (23) in a housing (21) by means of a measuring instrument (1) according to any one of claims 1 to 4, characterised in that the measuring instrument (1) is axially inserted with the conical region (8) of the push tube (2) in front into the housing (21), so that it is determined by means of a marking on the measuring instrument (1) whether the retaining ring (20) is properly arranged in the groove (23).
  6. The method according to claim 5, characterised in that the inserting and subsequent pressing of the retaining ring (20) into the groove (23) is controlled via an axially acting force on the measuring instrument (1).
  7. A use of the measuring instrument (1) according to any one of claims 1 to 4 for gauging and inserting a retaining ring (20) into a groove (23), wherein the retaining ring (20) fixes a ring gear (22) of a planetary transmission.
EP19720039.7A 2018-04-25 2019-04-12 Measuring instrument Active EP3784444B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018109897.9A DE102018109897A1 (en) 2018-04-25 2018-04-25 measuring tool
PCT/DE2019/100337 WO2019206366A1 (en) 2018-04-25 2019-04-12 Measuring instrument

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EP3784444A1 EP3784444A1 (en) 2021-03-03
EP3784444B1 true EP3784444B1 (en) 2022-12-28

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Country Link
EP (1) EP3784444B1 (en)
CN (1) CN111788038B (en)
DE (1) DE102018109897A1 (en)
HU (1) HUE061353T2 (en)
PL (1) PL3784444T3 (en)
WO (1) WO2019206366A1 (en)

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DE19631844C2 (en) * 1996-08-07 2001-08-16 Bayerische Motoren Werke Ag Device for inserting a slotted elastic locking ring into an annular groove of a workpiece
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Also Published As

Publication number Publication date
DE102018109897A1 (en) 2019-10-31
HUE061353T2 (en) 2023-06-28
PL3784444T3 (en) 2023-03-27
CN111788038A (en) 2020-10-16
EP3784444A1 (en) 2021-03-03
CN111788038B (en) 2022-07-12
WO2019206366A1 (en) 2019-10-31

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