WO2018166775A1 - Earthing cam - Google Patents

Earthing cam Download PDF

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Publication number
WO2018166775A1
WO2018166775A1 PCT/EP2018/054501 EP2018054501W WO2018166775A1 WO 2018166775 A1 WO2018166775 A1 WO 2018166775A1 EP 2018054501 W EP2018054501 W EP 2018054501W WO 2018166775 A1 WO2018166775 A1 WO 2018166775A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
thread
threaded insert
solder
mass
Prior art date
Application number
PCT/EP2018/054501
Other languages
German (de)
French (fr)
Inventor
Helge KLOSTERMEIER
Original Assignee
Rheinmetall Landsysteme Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rheinmetall Landsysteme Gmbh filed Critical Rheinmetall Landsysteme Gmbh
Publication of WO2018166775A1 publication Critical patent/WO2018166775A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/93—Fastener comprising feature for establishing a good electrical connection, e.g. electrostatic discharge or insulation feature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"
    • F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded

Definitions

  • the present invention relates to a mass cam for attachment to an element to be grounded.
  • Corresponding mass cams are used to attach an electrical ground potential to an element to be earthed, for example to bodies of vehicles.
  • the mass cam of stainless steel is connected to the element to be grounded. This is often done by welding.
  • welding operations in ferritic weld metal and welding operations in austenitic weld metal are subject to different regulations as well as carried out by different methods, the difficulty lies in providing a further manufacturing process in the manufacture of the element to be grounded for the ground connection, namely Welding of austenitic weld metal (mass cam).
  • Object of the present invention is therefore to avoid the above-mentioned disadvantages of the known from the prior art solutions and to provide an easy-to-assemble mass cam, which can be attached with little effort to the element to be grounded. While complying with all regulations and standards for such a mass cam.
  • a mass cam for attachment to a member to be grounded, characterized in that the mass cam comprises a threaded insert and a sleeve, wherein the sleeve has a sleeve bore, in which a sleeve thread is introduced, wherein the threaded insert has a ground bore, in which a ground thread is introduced., That the threaded insert is screwed via an insert thread into the sleeve bore with the sleeve thread and that a solder between the threaded insert and sleeve is arranged.
  • the mass cam thus consists of two parts, namely a threaded insert and a sleeve.
  • the sleeve is the part of the mass cam, which can be fastened to the element to be grounded. This is done mainly by welding, but can also be attached by other connections, such as gluing. It is important that there is an electrical connection between the sleeve and the element to be grounded.
  • the sleeve may consist of the same material as the element to be grounded, which has the advantage that the manufacturing process, by means of which the element to be earthed is made, can also be used for fastening the sleeve of the mass cam.
  • a welding process by which, for example, a vehicle body is welded may also be used to attach the sleeve to the body.
  • the sleeve according to the invention has a sleeve bore, which in turn includes a sleeve thread. The sleeve thread is thus arranged as an internal thread in the sleeve bore.
  • a threaded insert which has an insert thread as an external thread on the threaded insert. Furthermore, a ground hole is arranged in the threaded insert in such a way that the insert thread extends as an external thread around the ground hole and the ground hole is arranged centrally in the center of the insert thread. The ground bore is thus coaxial with the insert thread.
  • the threaded insert here consists of rostträgem steel, as prescribed for such mass cams.
  • the ground bore in the threaded insert further has a ground thread as a thread in the ground bore, thereby making it possible to produce an electrical ground potential at the mass cam by screw connection.
  • the material of the threaded insert is also electrically conductive, as well as that of the sleeve and that of the element to be earthed so that an electrical connection through the ground thread and the threaded insert and the sleeve and the element to be grounded is ensured.
  • a solder between the threaded insert and sleeve is further provided, which is brought on welding the sleeve on the element to be grounded by the heating of the sleeve to melt and connects the insert thread with the sleeve thread.
  • the solder is designed to match the two substances, namely the sleeve and the threaded insert, durable and resistant to corrosion.
  • the solder is designed as a soft solder.
  • the mass cam is prefabricated in that the solder is introduced into the sleeve and then the threaded insert is screwed into the sleeve. This creates a complete mass cam which can be fastened to the element to be grounded.
  • the solder is designed as a ring and the sleeve according to the invention has a groove above the Hüisengewindes.
  • the annular solder can then be inserted into the groove and is located when screwing the threaded insert into the sleeve exactly between the threaded insert and sleeve.
  • the solder is then melted by the heat transfer and connects ground thread and insert thread.
  • This polygonal surface of the threaded insert is preferably designed so that the surface protrudes beyond the insertion thread in its dimensions.
  • the surface thus has a larger radius than the insert thread. This ensures that when screwed threaded insert into the sleeve, the groove or the solder is covered.
  • Ais solder according to the invention is a soft solder in question, since this has the properties soften by heating the welding process of the sleeve and thus to solder threaded insert and sleeve together.
  • solder ring-shaped and insert it into a groove it is also possible to apply the solder on the sleeve thread or the insert thread during manufacture of the sleeve or the threaded insert. This results in an equally secure solder joint, as when inserting a ring in a corresponding groove.
  • Figure 1 is an exploded view in section through the components of the invention Massenockens.
  • Figure 1 shows in the upper parts of the figure, the two parts of the mass cam, namely threaded insert 1 and sleeve 10 in disassembled position and in the lower part of the figure as a mounted position. In the disassembled position, the two parts are shown in section and in plan view respectively.
  • the sleeve 10 has a sleeve bore 12, wherein the sleeve bore 12 can be arranged centrally or decentrally in the hull 0.
  • This variable arrangement of the Hüisenbohrung 12, the sleeve 10 of the invention can be matched to the respective elements to be grounded.
  • the surface of the sleeve 10 is drawn around, allowing for easy manufacture and easy installation.
  • the sleeve 10 is not limited to this geometry, but other geometries, such as a polygonal surface are possible.
  • the sleeve 10 also has a bottom, by means of which the sleeve 10 can be mounted on the element to be grounded. Such attachment is preferably done via welded joint. But there are also other electrically conductive connections possible.
  • the sleeve 10 has in its sleeve bore 12 a sleeve thread 13, which is arranged as an internal thread in the sleeve bore 12. Above the sleeve thread 13, a groove 1 is mounted, which also extends in a circle around the sleeve bore 2.
  • the groove 1 preferably has a slightly larger radius than the sleeve bore 12th
  • the threaded insert 1 also has a bore, namely a ground bore 2, in which a ground thread 3 is introduced.
  • This mass thread 3 is also provided as an internal thread in the ground bore 2. Due to the mass-material winch 3, an electrical ground potential can be attached to the threaded insert via a screw connection.
  • the threaded insert 1 has a surface and an insert thread 4 located underneath, which is arranged around the ground bore 2 around. Accordingly, the insert thread 4 is introduced as an external thread on the threaded insert 1. The surface is beyond the insert thread 4 addition, so that the surface of the threaded insert 1 has a larger radius than the insert thread 4. This results in the cut through the threaded insert 1 according to the invention a T-shaped component.
  • the threaded insert 1 according to the invention can now be screwed into the sleeve thread 13, so that a screw connection between the sleeve 10 and Thread insert 1 is created.
  • the surface of the threaded insert 1 is designed polygonal, so that when screwing a higher torque can act on the threaded insert.
  • a round surface is conceivable, which has two recesses to allow the screwed mitteis a tool.
  • a solder 20 is arranged between threaded insert 1 and sleeve 10.
  • the solder 20 is annular and is inserted into the groove 11 of the sleeve 1.
  • the solder 20 is thereby arranged on the one hand between the threaded insert 1 and the sleeve 10 and, secondly, the solder and the groove are covered by the surface of the threaded insert 1.
  • the mass cam according to the invention is designed in such a way that, when mounted on an element to be ground, it is heated by a thermal process such as welding such that the solder 20 melts and runs between the sleeve thread 13 and the insert thread 4 , When cooling a solid and permanent, electrically conductive connection between the threaded insert 1 and sleeve 10 is then ensured.
  • the sleeve according to the invention 0 is made of a ferritic weld metal and the threaded insert 1 according to the invention made of austenitic weld metal. Due to the fact that, when the mass cam according to the invention is mounted on the element to be earthed, the solder 20 connects sleeve 10 and threaded insert 1, a permanent and firm connection between the two different materials is thus ensured without additional welding.
  • Threaded insert 1 and sleeve 10 are made so that they can already be assembled as a pre-assembly of the mass cam on the material to be grounded.
  • the invention is not limited to the above-mentioned features, but further embodiments are conceivable. So further materials of sleeve and threaded insert are conceivable, for example, simple structural steel for the sleeve and stainless steel 1.4571 for the threaded insert. It is also possible to make the sleeve not round, but star-shaped. The resulting, longer weld reliably conductive connections are possible, which are more durable. LIST OF REFERENCE NUMBERS

Abstract

The invention relates to an earthing cam for attachment to an element that is to be earthed, wherein the earthing cam comprises a threaded insert portion and a sleeve. These two parts of the earthing cam can be brought into operative connection by screwing the threaded insert portion into the sleeve. To this end, the sleeve comprises a sleeve bore with sleeve thread and the threaded insert portion comprises an earthing bore with earthing thread. The two threads are coordinated with one another, such that the threaded insert portion can be screwed into the sleeve. Furthermore, a solder is provided between the threaded insert portion and sleeve, which solder strengthens the connection between the threaded insert portion and the sleeve.

Description

BESCHREIBUNG  DESCRIPTION
Massenocken mass cams
Die vorliegende Erfindung betrifft einen Massenocken zur Anbringung an ein zu erdendes Element. Entsprechende Massenocken werden dazu verwendet ein elektrisches Massepotenzial an ein zu erdendes Element, beispielsweise an Karosserien von Fahrzeugen, anzubringen. The present invention relates to a mass cam for attachment to an element to be grounded. Corresponding mass cams are used to attach an electrical ground potential to an element to be earthed, for example to bodies of vehicles.
Hierzu sind unterschiedliche Normen und Vorschriften zu beachten, da die Anbringung von Massepotenzialen bzw. Erdung eine Sicherung des zu erdenden Elements gewährleisten soll. So ist eine Vorschrift hierzu, dass die Komponenten zur elektrischen Erdung aus rostträgem Stahl bestehen sollen. For this purpose, different standards and regulations must be observed, since the attachment of ground potentials or grounding should ensure a fuse of the element to be grounded. So a rule is that the components for electrical grounding should be made of rust-resistant steel.
Schwierigkeiten ergeben sich nun, wenn das zu erdende Element nicht aus einem rostträgem Stahl besteht. Entsprechende Anwendungsgebiete sind im Fahrzeugbau zu finden, wo Karosseriekomponenten, wie Fahrzeuggestell, Chassis etc. geerdet sein müssen, um gegen elektrostatische Ladung sowie elektrostatische Felder geschützt zu sein. Die Erdung soll im Ergebnis einen korrosionsunempfindlichen Stromübergang ermöglichen, was sich als schwierig bei Werkstoffen darstellt, die korrosionsempfindlich sind. Difficulties now arise when the element to be ground does not consist of a rust-resistant steel. Corresponding fields of application are found in vehicle construction, where body components, such as vehicle frame, chassis, etc., must be grounded in order to be protected against electrostatic charge and electrostatic fields. The grounding should result in a corrosion-resistant current transfer, which is difficult for materials that are sensitive to corrosion.
Für die Fertigung ist es demnach notwendig, dass der Massenocken aus rostträgem Stahl mit dem zu erdenden Element verbunden wird. Dies geschieht häufig durch Schweißen. Da jedoch Schweißvorgänge bei ferritischem Schweißgut und Schweißvorgänge bei austenitischen Schweißgut (bspw. rostträgem Stahl) unterschiedliche Vorschriften unterliegen sowie auch durch unterschiedliche Verfahren durchgeführt wird, liegt die Schwierigkeit darin, in der Fertigung des zu erdenden Elementes für die Masseanbindung einen weiteren Fertigungsgang bereitzustellen, nämlich das Schweißen des austenitischen Schweißguts (Massenocken). For production, it is therefore necessary that the mass cam of stainless steel is connected to the element to be grounded. This is often done by welding. However, since welding operations in ferritic weld metal and welding operations in austenitic weld metal (eg. Rostträgem steel) are subject to different regulations as well as carried out by different methods, the difficulty lies in providing a further manufacturing process in the manufacture of the element to be grounded for the ground connection, namely Welding of austenitic weld metal (mass cam).
Aus dem Stand der Technik ist hierzu bekannt, das ein ferritischer Massenocken unter Verwendung eines Flammspritzprozesses auf das zu erdende Element aufgebracht wird. Dieses Verfahren erfordert jedoch eine spezielle Zulassung und bedarf aufwendiger Ausrüstung und Bedienerprüfungen. Weiterhin sind aus dem Stand der Technik Einschraublösungen bekannt, bei denen entsprechende Massenocken in ferritische Gewindehülsen eingeschraubt werden. Eine solche Gewindehülse ist beispielsweise aus der DE 10 2010 018 486 A1 bekannt. Hierbei sind jedoch zwei Arbeitsgänge erforderlich, um einen Massenocken an ein zu erdendes Element anzubringen, nämlich zum einen das Verschweißen der Gewindehülse und zum anderen das Einbringen der Einschraublösung. Erst danach kann der vollständige Massenocken zur Erdung von zu erdenden Elementen verwendet werden. It is known from the prior art that a ferritic mass cam is applied to the element to be ground using a flame spraying process. However, this method requires special approval and requires complex equipment and operator checks. Furthermore, from the prior art screw-in solutions are known in which corresponding mass socks are screwed into ferritic threaded sleeves. Such a threaded sleeve is known for example from DE 10 2010 018 486 A1. Here, however, two operations are required to attach a mass cam to a grounded element, namely, on the one hand, the welding of the threaded sleeve and on the other hand, the introduction of the Einschraublösung. Only then can the full mass cam be used to ground grounding elements.
Aufgabe der vorliegenden Erfindung ist es daher, die oben genannten Nachteile der aus dem Stand der Technik bekannten Lösungen zu vermeiden und einen einfach zu montierenden Massenocken bereitzustellen, der mit wenig Aufwand an das zu erdende Element angebracht werden kann. Bei gleichzeitiger Einhaltung aller Vorschriften und Normen für einen solchen Massenocken. Object of the present invention is therefore to avoid the above-mentioned disadvantages of the known from the prior art solutions and to provide an easy-to-assemble mass cam, which can be attached with little effort to the element to be grounded. While complying with all regulations and standards for such a mass cam.
Diese Aufgabe wird durch den Hauptanspruch der vorliegenden Erfindung gelöst, nämlich durch einen Massenocken zur Anbringung an ein zu erdendes Element, dadurch gekennzeichnet, dass der Massenocken einen Gewindeeinsatz und eine Hülse umfasst, wobei die Hülse eine Hülsenbohrung aufweist, in welcher ein Hülsengewinde eingebracht ist, wobei der Gewindeeinsatz eine Massebohrung aufweist, in welcher ein Massegewinde eingebracht ist., dass der Gewindeeinsatz über ein Einsatzgewinde in die Hülsenbohrung mit dem Hülsengewinde einschraubbar ist und dass ein Lot zwischen Gewindeeinsatz und Hülse angeordnet ist. This object is achieved by the main claim of the present invention, namely by a mass cam for attachment to a member to be grounded, characterized in that the mass cam comprises a threaded insert and a sleeve, wherein the sleeve has a sleeve bore, in which a sleeve thread is introduced, wherein the threaded insert has a ground bore, in which a ground thread is introduced., That the threaded insert is screwed via an insert thread into the sleeve bore with the sleeve thread and that a solder between the threaded insert and sleeve is arranged.
Erfindungsgemäß besteht der Massenocken somit aus zwei Teilen, nämlich einem Gewindeeinsatz und einer Hülse. Die Hülse ist dabei der Teil des Massenockens, der an dem zu erdenden Element befestigbar ist. Dies geschieht hauptsächlich durch Schweißen, kann aber auch durch andere Verbindungen, wie Kleben, angebracht werden. Wichtig ist hierbei, dass eine elektrische Verbindung zwischen der Hülse und dem zu erdenden Element besteht. According to the invention, the mass cam thus consists of two parts, namely a threaded insert and a sleeve. The sleeve is the part of the mass cam, which can be fastened to the element to be grounded. This is done mainly by welding, but can also be attached by other connections, such as gluing. It is important that there is an electrical connection between the sleeve and the element to be grounded.
Die Hülse kann dabei aus dem gleichen Material bestehen, wie das zu erdende Element, was den Vorteil besitzt, dass das Fertigungsverfahren, mittels weichem das zu erdende Element gefertigt wird, ebenfalls für die Befestigung der Hülse des Massenockens verwendet werden kann. So kann ein Schweißverfahren, mittels welchem beispielsweise eine Fahrzeugkarosserie geschweißt wird, ebenfalls dazu verwendet werden, die Hülse auf der Karosserie anzubringen. Es ist kein anderes Schweißverfahren notwendig. Die erfindungsgemäße Hülse weist eine Hülsenbohrung auf, welche wiederum ein Hülsengewinde beinhaltet. Das Hülsengewinde ist somit als Innengewinde in der Hülsenbohrung angeordnet. The sleeve may consist of the same material as the element to be grounded, which has the advantage that the manufacturing process, by means of which the element to be earthed is made, can also be used for fastening the sleeve of the mass cam. Thus, a welding process by which, for example, a vehicle body is welded may also be used to attach the sleeve to the body. There is no other welding process necessary. The sleeve according to the invention has a sleeve bore, which in turn includes a sleeve thread. The sleeve thread is thus arranged as an internal thread in the sleeve bore.
Passend zur Hülse wird ein Gewindeeinsatz vorgeschlagen, welcher ein Einsatzgewinde als Außengewinde am Gewindeeinsatz aufweist. Weiterhin ist im Gewindeeinsatz eine Massebohrung angeordnet und zwar so, dass das Einsatzgewinde als Außengewinde um die Massebohrung verläuft und die Massebohrung mittig im Zentrum des Einsatzgewindes angeordnet ist. Die Massebohrung verläuft damit koaxial mit dem Einsatzgewinde. Matching the sleeve, a threaded insert is proposed, which has an insert thread as an external thread on the threaded insert. Furthermore, a ground hole is arranged in the threaded insert in such a way that the insert thread extends as an external thread around the ground hole and the ground hole is arranged centrally in the center of the insert thread. The ground bore is thus coaxial with the insert thread.
Über das Einsatzgewinde kann nun der Gewindeeinsatz in die Hülsenbohrung eingeschraubt werden, da das Einsatzgewinde und das Hülsengewinde aufeinander abgestimmt sind. Der Gewindeeinsatz besteht hierbei aus rostträgem Stahl, wie es für solche Massenocken vorgeschrieben ist. About the insert thread now the threaded insert can be screwed into the sleeve bore, since the insert thread and the sleeve thread are matched. The threaded insert here consists of rostträgem steel, as prescribed for such mass cams.
Die Massebohrung im Gewindeeinsatz weist weiterhin ein Massegewinde als Gewinde in der Massebohrung auf, wodurch es ermöglicht wird, ein elektrisches Massepotenzial am Massenocken durch Schraubverbindung herzustellen. Das Material des Gewindeeinsatzes ist ebenfalls elektrisch leitend, genauso wie das der Hülse und das des zu erdenden Elements sodass eine elektrische Verbindung über das Massegewinde und dem Gewindeeinsatz sowie der Hülse und des zu erdenden Elements gewährleistet ist. The ground bore in the threaded insert further has a ground thread as a thread in the ground bore, thereby making it possible to produce an electrical ground potential at the mass cam by screw connection. The material of the threaded insert is also electrically conductive, as well as that of the sleeve and that of the element to be earthed so that an electrical connection through the ground thread and the threaded insert and the sleeve and the element to be grounded is ensured.
Erfindungsgemäß ist weiterhin ein Lot zwischen Gewindeeinsatz und Hülse vorgesehen, welches bei Verschweißen der Hülse auf dem zu erdenden Element durch die Erhitzung der Hülse zum Schmelzen gebracht wird und das Einsatzgewinde mit dem Hülsengewinde verbindet. Durch diesen Vorgang ist es möglich, den vorgefertigten Massenocken auf dem zu erdenden Element durch einen herkömmlichen Schweißvorgang anzubringen und gleichzeitig dabei den ferritischen Teil der Masseverbindung mit dem austenitischen Teil entsprechend sicher zu verbinden. According to the invention, a solder between the threaded insert and sleeve is further provided, which is brought on welding the sleeve on the element to be grounded by the heating of the sleeve to melt and connects the insert thread with the sleeve thread. By this process, it is possible to attach the prefabricated mass cam on the element to be ground by a conventional welding process and at the same time to connect the ferritic part of the ground connection with the austenitic part accordingly safe.
Das Lot ist dazu entsprechend gestaltet, um die beiden Stoffe, nämlich die Hülse und den Gewindeeinsatz, dauerhaft und korrosionsunempfindlich zu verbinden. Bevorzugterweise ist das Lot dazu als Weichlot ausgeführt. Der Massenocken wird dadurch vorgefertigt, dass in die Hülse das Lot eingebracht wird und danach der Gewindeeinsatz in die Hülse eingeschraubt wird. Dadurch entsteht ein kompletter Massenocken der auf das zu erdende Element befestigbar ist. The solder is designed to match the two substances, namely the sleeve and the threaded insert, durable and resistant to corrosion. Preferably, the solder is designed as a soft solder. The mass cam is prefabricated in that the solder is introduced into the sleeve and then the threaded insert is screwed into the sleeve. This creates a complete mass cam which can be fastened to the element to be grounded.
Bevorzugterweise ist das Lot als Ring ausgeführt und die erfindungsgemäße Hülse besitzt eine Nut oberhalb des Hüisengewindes. Das ringförmige Lot kann dann in die Nut eingelegt werden und befindet sich bei Einschrauben des Gewindeeinsatzes in die Hülse genau zwischen Gewindeeinsatz und Hülse. Bei Anschweißen der Hülse an dem zu erdenden Element wird dann durch die Hitzeübertragung das Lot geschmolzen und verbindet Massegewinde und Einsatzgewinde. Preferably, the solder is designed as a ring and the sleeve according to the invention has a groove above the Hüisengewindes. The annular solder can then be inserted into the groove and is located when screwing the threaded insert into the sleeve exactly between the threaded insert and sleeve. When the sleeve is welded to the element to be earthed, the solder is then melted by the heat transfer and connects ground thread and insert thread.
Zur Verbesserung des Einschraubens des Gewindeeinsatzes in die Hülse wird vorgeschlagen, bevorzugterweise die Oberfläche des Gewindeeinsatzes mehreckig zu gestalten, um ein größeres Drehmoment beim Einschrauben des Gewindeeinsatzes in die Hülse zu ermöglichen. To improve the screwing of the threaded insert in the sleeve is proposed, preferably to make the surface of the threaded insert polygonal, to allow a larger torque when screwing the threaded insert into the sleeve.
Diese mehreckige Oberfläche des Gewindeeinsatzes ist bevorzugterweise so gestaltet, dass die Oberfläche in ihren Ausmaßen über das Einsatzgewinde hinausragt. Die Oberfläche besitzt somit einen größeren Radius als das Einsatzgewinde. Dadurch wird sichergestellt, dass bei eingeschraubtem Gewindeeinsatz in die Hülse die Nut bzw. das Lot abgedeckt wird. This polygonal surface of the threaded insert is preferably designed so that the surface protrudes beyond the insertion thread in its dimensions. The surface thus has a larger radius than the insert thread. This ensures that when screwed threaded insert into the sleeve, the groove or the solder is covered.
Ais Lot kommt erfindungsgemäß ein Weichlot in Frage, da dieses die Eigenschaften besitzt durch die Erhitzung des Schweißvorganges der Hülse aufzuweichen und somit Gewindeeinsatz und Hülse miteinander zu verlöten. Ais solder according to the invention is a soft solder in question, since this has the properties soften by heating the welding process of the sleeve and thus to solder threaded insert and sleeve together.
Statt das Lot ringförmig auszugestalten und in eine Nut einzulegen, ist es ebenso möglich, dass das Lot bei Fertigung der Hülse oder des Gewindeeinsatzes auf das Hülsengewinde bzw. das Einsatzgewinde aufzutragen. Hierdurch entsteht dann eine ebenso sichere Lötverbindung, wie bei einem Einlegen eines Ringes in eine entsprechende Nut. Instead of designing the solder ring-shaped and insert it into a groove, it is also possible to apply the solder on the sleeve thread or the insert thread during manufacture of the sleeve or the threaded insert. This results in an equally secure solder joint, as when inserting a ring in a corresponding groove.
Weitere Merkmale der vorliegenden Erfindung ergeben sich aus der beigefügten Zeichnung. Es zeigt: Further features of the present invention will become apparent from the accompanying drawings. It shows:
Figur 1 eine Explosionszeichnung im Schnitt durch die Bestandteile des erfindungsgemäßen Massenockens. Figur 1 zeigt in der oberen Häifte der Figur die beiden Teile des Massenockens, nämlich Gewindeeinsatz 1 und Hülse 10 in demontierter Position und im unteren Teil die Figur als montierte Position. In der demontierten Position sind jeweils die beiden Teile im Schnitt und in der Draufsicht gezeigt. Erfindungsgemäß weist die Hülse 10 eine Hülsenbohrung 12 auf, wobei die Hülsenbohrung 12 mittig oder dezentral in der Hüise 0 angeordnet sein kann. Durch diese variable Anordnung der Hüisenbohrung 12 kann die erfindungsgemäße Hülse 10 auf die jeweils zu erdenden Elemente abgestimmt werden. Figure 1 is an exploded view in section through the components of the invention Massenockens. Figure 1 shows in the upper parts of the figure, the two parts of the mass cam, namely threaded insert 1 and sleeve 10 in disassembled position and in the lower part of the figure as a mounted position. In the disassembled position, the two parts are shown in section and in plan view respectively. According to the invention, the sleeve 10 has a sleeve bore 12, wherein the sleeve bore 12 can be arranged centrally or decentrally in the hull 0. This variable arrangement of the Hüisenbohrung 12, the sleeve 10 of the invention can be matched to the respective elements to be grounded.
Die Oberfläche der Hülse 10 ist rund gezeichnet, was eine einfache Fertigung und eine einfache Montage ermöglicht. Jedoch ist die Hülse 10 nicht auf diese Geometrie eingeschränkt, vielmehr sind weitere Geometrien, wie etwa eine vieleckige Oberfläche möglich. The surface of the sleeve 10 is drawn around, allowing for easy manufacture and easy installation. However, the sleeve 10 is not limited to this geometry, but other geometries, such as a polygonal surface are possible.
Die Hülse 10 weist auch einen Boden auf, mittels welchem die Hülse 10 auf das zu erdende Element befestigt werden kann. Eine solche Befestigung geschieht bevorzugterweise über Schweißverbindung. Es sind aber auch andere, elektrisch leitende Verbindungen möglich. The sleeve 10 also has a bottom, by means of which the sleeve 10 can be mounted on the element to be grounded. Such attachment is preferably done via welded joint. But there are also other electrically conductive connections possible.
Die Hülse 10 besitzt in ihrer Hülsenbohrung 12 ein Hülsengewinde 13, welches als Innengewinde in der Hülsenbohrung 12 angeordnet ist. Oberhalb des Hülsengewindes 13 ist eine Nut 1 angebracht, welche ebenfalls kreisförmig um die Hülsenbohrung 2 verläuft. Hierbei besitzt die Nut 1 bevorzugterweise einen etwas größeren Radius als die Hülsenbohrung 12. The sleeve 10 has in its sleeve bore 12 a sleeve thread 13, which is arranged as an internal thread in the sleeve bore 12. Above the sleeve thread 13, a groove 1 is mounted, which also extends in a circle around the sleeve bore 2. Here, the groove 1 preferably has a slightly larger radius than the sleeve bore 12th
Der erfindungsgemäße Gewindeeinsatz 1 besitzt ebenfalls eine Bohrung, nämlich eine Massebohrung 2, in welcher ein Massegewinde 3 eingebracht ist. Auch dieses Massengewinde 3 ist als Innengewinde in der Massebohrung 2 vorgesehen. Durch das Massegenwinde 3 kann über eine Schraubverbindung ein elektrisches Massepotenzial am Gewindeeinsatz angebracht werden. The threaded insert 1 according to the invention also has a bore, namely a ground bore 2, in which a ground thread 3 is introduced. This mass thread 3 is also provided as an internal thread in the ground bore 2. Due to the mass-material winch 3, an electrical ground potential can be attached to the threaded insert via a screw connection.
Der Gewindeeinsatz 1 besitzt eine Oberfläche und ein darunter befindliches Einsatzgewinde 4, welches um die Massebohrung 2 herum angeordnet ist. Demnach ist das Einsatzgewinde 4 als Außengewinde am Gewindeeinsatz 1 eingebracht. Die Oberfläche steht über das Einsatzgewinde 4 hinaus, sodass die Oberfläche des Gewindeeinsatzes 1 einen größeren Radius hat als das Einsatzgewinde 4. Dadurch entsteht beim Schnitt durch den erfindungsgemäßen Gewindeeinsatz 1 ein T-förmiges Bauteil. The threaded insert 1 has a surface and an insert thread 4 located underneath, which is arranged around the ground bore 2 around. Accordingly, the insert thread 4 is introduced as an external thread on the threaded insert 1. The surface is beyond the insert thread 4 addition, so that the surface of the threaded insert 1 has a larger radius than the insert thread 4. This results in the cut through the threaded insert 1 according to the invention a T-shaped component.
Über das Einsatzgewinde 4 kann nun der erfindungsgemäße Gewindeeinsatz 1 in das Hülsengewinde 13 eingedreht werden, sodass eine Schraubverbindung zwischen Hülse 10 und Gewindeeinsatz 1 entsteht. Bevorzugterweise ist die Oberfläche des Gewindeeinsatzes 1 hierzu mehreckig ausgeführt, damit beim Einschrauben ein höheres Drehmoment auf den Gewindeeinsatz wirken kann. Ebenso ist eine runde Oberfläche denkbar, welche zwei Ausnehmungen aufweist, um die Einschraubung mitteis einem Werkzeug zu ermöglichen. About the insert thread 4, the threaded insert 1 according to the invention can now be screwed into the sleeve thread 13, so that a screw connection between the sleeve 10 and Thread insert 1 is created. Preferably, the surface of the threaded insert 1 is designed polygonal, so that when screwing a higher torque can act on the threaded insert. Likewise, a round surface is conceivable, which has two recesses to allow the screwed mitteis a tool.
Weiterhin wird erfindungsgemäß ein Lot 20 zwischen Gewindeeinsatz 1 und Hülse 10 angeordnet. In der Figur 1 ist das Lot 20 ringförmig und wird in die Nut 11 der Hülse 1 eingelegt. Beim Einschrauben des Gewindeeinsatz 1 in die Hülse 10 ist dadurch zum einen das Lot 20 zwischen Gewindeeinsatz 1 und Hülse 10 angeordnet und zum anderen wird durch die Oberfläche des Gewindeeinsatz 1 das Lot und die Nut abgedeckt. Furthermore, according to the invention, a solder 20 is arranged between threaded insert 1 and sleeve 10. In the figure 1, the solder 20 is annular and is inserted into the groove 11 of the sleeve 1. When screwing the threaded insert 1 into the sleeve 10, the solder 20 is thereby arranged on the one hand between the threaded insert 1 and the sleeve 10 and, secondly, the solder and the groove are covered by the surface of the threaded insert 1.
Im unten auf Figur 1 abgebildeten, montierten Zustand ist der erfindungsgemäße Massenocken derart gestaltet, dass er bei Anbringung auf einem zu erdenden Element durch ein thermisches Verfahren, wie beispielsweise Schweißen derart erhitzt wird, dass das Lot 20 schmilzt und zwischen Hülsengewinde 13 und Einsatzgewinde 4 verläuft. Bei Erkalten wird dann eine feste und dauerhafte, elektrisch leitende Verbindung zwischen Gewindeeinsatz 1 und Hülse 10 gewährleistet. In the assembled state shown in the lower part of FIG. 1, the mass cam according to the invention is designed in such a way that, when mounted on an element to be ground, it is heated by a thermal process such as welding such that the solder 20 melts and runs between the sleeve thread 13 and the insert thread 4 , When cooling a solid and permanent, electrically conductive connection between the threaded insert 1 and sleeve 10 is then ensured.
Die erfindungsgemäße Hülse 0 ist aus einem ferritischen Schweißgut gefertigt und der erfindungsgemäße Gewindeeinsatz 1 aus austenitischem Schweißgut. Dadurch, dass bei Anbringung des erfindungsgemäßen Massenockens auf das zu erdende Element das Lot 20 Hülse 10 und Gewindeeinsatz 1 verbindet, ist somit eine dauerhafte und feste Verbindung zwischen den beiden unterschiedlichen Materialien gewährleistet ohne zusätzlichen Schweißvorgang. The sleeve according to the invention 0 is made of a ferritic weld metal and the threaded insert 1 according to the invention made of austenitic weld metal. Due to the fact that, when the mass cam according to the invention is mounted on the element to be earthed, the solder 20 connects sleeve 10 and threaded insert 1, a permanent and firm connection between the two different materials is thus ensured without additional welding.
Gewindeeinsatz 1 und Hülse 10 sind so gefertigt, dass diese als Vormontage des Massenockens auf den zu erdenden Material bereits zusammengefügt werden können. Threaded insert 1 and sleeve 10 are made so that they can already be assembled as a pre-assembly of the mass cam on the material to be grounded.
Die Erfindung ist nicht auf die oben genannten Merkmale beschränkt, vielmehr sind weitere Ausführungsformen denkbar. So sind weitere Materialien von Hülse und Gewindeeinsatz denkbar, beispielsweise einfacher Baustahl für die Hülse und Chromnickelstahl 1.4571 für den Gewindeeinsatz. Ebenso ist es möglich die Hülse nicht rund, sondern sternförmig zu gestalten. Durch die dadurch entstehende, längere Schweißnaht sind zuverlässig leitende Verbindungen möglich, die langlebiger sind. BEZUGSZEICHENLISTE The invention is not limited to the above-mentioned features, but further embodiments are conceivable. So further materials of sleeve and threaded insert are conceivable, for example, simple structural steel for the sleeve and stainless steel 1.4571 for the threaded insert. It is also possible to make the sleeve not round, but star-shaped. The resulting, longer weld reliably conductive connections are possible, which are more durable. LIST OF REFERENCE NUMBERS
Gewindeeinsatzthreaded insert
2 Massebohrung2 ground hole
3 Massegewinde3 ground thread
4 Einsatzgewinde4 insert threads
Hülse NutSleeve groove
Hülsenbohrung Hülsengewinde Lot Sleeve bore sleeve thread solder

Claims

ANSPRÜCHE
1. Massenocken zur Anbringung an ein zu erdendes Element, 1. mass cam for attachment to an element to be earthed,
dadurch gekennzeichnet,  characterized,
dass der Massenocken einen Gewindeeinsatz (1) und eine Hülse (10) umfasst, wobei die Hülse (10) eine Hüisenbohrung (12) aufweist, in welche ein Hülsengewinde (13) eingebracht ist,  the mass cam comprises a threaded insert (1) and a sleeve (10), the sleeve (10) having a bore (12) into which a sleeve thread (13) is inserted,
wobei der Gewindeeinsatz (1) eine Massebohrung (2) aufweist, in welche ein Massegewinde (3) eingebracht ist,  wherein the threaded insert (1) has a ground hole (2) into which a ground thread (3) is inserted,
dass der Gewindeeinsatz (1) über ein Einsatzgewinde (4) in die Hülsenbohrung (12) mit dem Hülsengewinde (13) einschraubbar ist  the threaded insert (1) can be screwed into the sleeve bore (12) with the sleeve thread (13) via an insert thread (4)
und dass ein Lot (20) zwischen Gewindeeinsatz (1) und Hülse (10) angeordnet ist.  and that a solder (20) between the threaded insert (1) and sleeve (10) is arranged.
2. Massenocken nach Anspruch 1, dadurch gekennzeichnet, die Hülse einen Boden aufweist, mittels welchem der Massenocken an einem zu erdenden Element befestigbar ist. 2. mass cam according to claim 1, characterized in that the sleeve has a bottom, by means of which the mass cam can be fastened to an element to be grounded.
3. Massenocken nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Massenocken mittels Schweißen an einem zu erdenden Element befestigbar ist. 3. mass cam according to claim 1 or 2, characterized in that the mass cam can be fastened by means of welding to an element to be grounded.
4. Massenocken nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das zu erdende Element ein Fahrzeuggehäuse ist. 4. mass cam according to one of claims 1 to 3, characterized in that the element to be grounded is a vehicle housing.
5. Massenocken nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Lot (20) als Ring ausgeführt ist. 5. mass cam according to one of claims 1 to 4, characterized in that the solder (20) is designed as a ring.
6. Massenocken nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Nut (11) an der Hülse (10) vorgesehen ist, in welcher das Lot einlegbar ist. 6. mass cam according to one of claims 1 to 5, characterized in that a groove (11) on the sleeve (10) is provided, in which the solder is inserted.
7. Massenocken nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Gewindeeinsatz (1) eine Oberfläche aufweist, welche in ihren Ausmaßen über das Einsatzgewinde (4) hinausragt. 7. mass cam according to one of claims 1 to 6, characterized in that the threaded insert (1) has a surface which projects beyond the insert thread (4) in their dimensions.
8. Massenocken nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Oberfläche bei eingeschraubtem Gewindeeinsatz (1) in die Hülse ( 0) die Nut (11) abdeckt. 8. mass cam according to claim 6 or 7, characterized in that the surface with screwed threaded insert (1) in the sleeve (0) covering the groove (11).
9. Massenocken nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Hülse aus ferritischem Stahl, insbesondere Baustahl besteht. 9. mass cam according to one of claims 1 to 8, characterized in that the sleeve consists of ferritic steel, in particular mild steel.
10. Massenocken nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Gewindeeinsatz (1) aus austenitischem Materia! besteht, insbesondere aus Chrom- Nickel-Stahl. 10. mass cam according to one of claims 1 to 9, characterized in that the threaded insert (1) made of austenitic Materia! consists, in particular of chromium-nickel steel.
11. Massenocken nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Lot (20) ein Weichlot ist. 11. mass cam according to one of claims 1 to 10, characterized in that the solder (20) is a soft solder.
12. Massenocken nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Lot (20) in der Hülse (10) oberhalb des Hülsengewindes (13) angeordnet ist und in Kontakt zur Hülse (10) steht. 12. mass cam according to one of claims 1 to 11, characterized in that the solder (20) in the sleeve (10) above the sleeve thread (13) is arranged and in contact with the sleeve (10).
13. Massenocken nach einem der Ansprüche 1 bis 11 , dadurch gekennzeichnet, dass das Lot (20) auf das Hülsengewinde (13) aufgetragen ist. 13. mass cam according to one of claims 1 to 11, characterized in that the solder (20) is applied to the sleeve thread (13).
PCT/EP2018/054501 2017-03-17 2018-02-23 Earthing cam WO2018166775A1 (en)

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DE202017101555.6U DE202017101555U1 (en) 2017-03-17 2017-03-17 mass cams

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