EP1926178B1 - Clamping sleeve and method of manufacturing the same - Google Patents
Clamping sleeve and method of manufacturing the same Download PDFInfo
- Publication number
- EP1926178B1 EP1926178B1 EP06024390A EP06024390A EP1926178B1 EP 1926178 B1 EP1926178 B1 EP 1926178B1 EP 06024390 A EP06024390 A EP 06024390A EP 06024390 A EP06024390 A EP 06024390A EP 1926178 B1 EP1926178 B1 EP 1926178B1
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- EP
- European Patent Office
- Prior art keywords
- upper wall
- wall sections
- clamping piece
- wall section
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 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
- H01R4/36—Conductive members located under tip of screw
- H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/063—Friction heat forging
- B21J5/066—Flow drilling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
- B21K25/005—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components by friction heat forging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
Definitions
- the invention relates to a clamping sleeve for electrical conductors according to the preamble of claim 1.
- the invention according to the preamble of claim 7 relates to a method for producing the clamping sleeve.
- Electrical connection terminals in particular terminal blocks, have an insulating housing with, for example, designed as Switzerlandfeder-, direct-, cutting or Schaub connection terminals for clamping and contacting of electrical conductors.
- Electrical connection terminals with screw connection are characterized by their high clamping forces that can be continuously transmitted to electrical conductors over the years. With this type of terminal predetermined high clamping forces can be maintained without fluctuations even when acting on the electrical terminal vibration. Due to these properties, electrical connection terminals with screw connection are also preferred in demanding industrial applications with moving and oscillating machine parts.
- An electrical connection terminal with screw connection comprises a clamping sleeve mounted in the insulating housing and formed by electrically conductive wall sections and having a receiving space for an electrical conductor.
- One of the wall sections contains at least one guided into the receiving space threaded hole, each with a screw inserted. Your screw head is accessible via an opening provided in the insulating housing mounting opening so that the screw can be rotated with its tip into the receiving space and can clamp an electrical conductor inserted therein.
- Such electrical terminals with clamping sleeves and screw are, for example, from the DE 295 22 146 U1 , of the DE 30 03 140 A1 , of the US 2,885,654 known.
- the largest influencing factor on the transferable clamping forces is the axial length of the threaded hole, which corresponds to the sheet thickness.
- Remedy here creates a from the DE 195 46 889 A1 known clamping sleeve.
- the known clamping sleeve comprises a U-shaped wall portion of a bent sheet metal part with a bottom wall portion and two adjoining side wall portions with provided at their upper ends notches for receiving a separate insert it a central threaded hole.
- the insert has a greater material thickness than the sheet metal part.
- the length of the axial threaded hole corresponds to the material thickness of the insert and thus can be easily adapted to this.
- a major disadvantage of this design is considered that the clamping sleeve is multi-part and thus several tools are necessary for their production and the manufacturing costs are correspondingly high.
- a well-known alternative solution provides for extending the axial thread length a threaded bore with a projecting beyond the sheet approach. The additional length of the threaded hole results from the axial length of the neck. Such a threaded hole can, for example. By punching the sheet metal part followed by thermoforming Tools are necessary for their production and the manufacturing costs are correspondingly high.
- a well-known alternative solution provides for extending the axial thread length a threaded bore with a projecting beyond the sheet approach. The additional length of the threaded hole results from the axial length of the neck. Such a threaded hole can be achieved, for example, by punching the sheet-metal bent part followed by a deep-drawing process. This production is time-consuming and expensive due to the numerous process steps.
- the clamping sleeve for electrical conductors consists of a frame-shaped, electrically conductive sheet metal bent part with an upper wall portion and an associated approximately U-shaped lower wall portion. This comprises a bottom wall section with a first side wall section and second side wall sections adjoining thereto.
- the threaded hole produced by flow molding with their collar-shaped projections is formed on the outer sides of the upper wall portion.
- the length of the threaded bore has been increased in accordance with the axial length of the collar-shaped projections relative to the plate thickness of the upper wall portion.
- the clamping sleeve is integrally formed and can thus be manufactured inexpensively.
- the invention has for its object to disclose a clamping sleeve with threaded hole, with the even higher clamping forces can be transmitted to clamped to electrical conductors.
- the invention solves the problem by a clamping sleeve with the features of claim 1.
- the clamping sleeve according to the invention according to claim 1 comprises a Sheet metal bending part with an upper wall portion and a first side wall portion and second side wall portion connected thereto.
- the axial length of the threaded hole has been lengthened by providing two upper wall sections arranged one above the other and each deflected by the two side wall sections, with the threaded hole passing through the two upper wall sections is and connects them mechanically.
- the threaded hole is produced by flow molding technology, so that the two upper wall sections are connected to one another mechanically by the material exchange of the dissolved material taking place during the flow molding technique.
- the axial length of the threaded hole with respect to the known clamping sleeve from the DE 203 10 459 U1 increased by the thickness of exactly one upper wall portion, because the known clamping sleeve has a single upper wall portion.
- a clamping sleeve is provided by the invention, which is very simple and thus inexpensive to produce as a one-piece sheet metal bent part. Furthermore, it is achieved by the invention that only the most critical for the power transmission area, namely the thread length of the threaded hole, is precisely modified, without parameters of the remaining areas of the clamping sleeve, for example the sheet thickness, to change.
- a particular embodiment of the invention provides that the two upper wall sections approximately plan on each other due to the induced in the threaded hole production oscillations between the two upper wall sections has been expected.
- the two upper wall sections are approximately planar to each other, it is possible, even with two upper wall sections, the receiving space of the clamping sleeve sufficiently large form, without having to carry out the side wall sections particularly high. Furthermore, it is achieved by the two approximately plan superposed upper wall sections that the mechanical connection between the two upper wall sections is much firmer; as in two upper, separated by a gap wall sections.
- a fastening means is provided on the clamping sleeve in an advantageous manner. This ensures that both upper wall sections can comply exactly with their position even in the production of the threaded hole and are not deformed or even pressed into the receiving space.
- the upper wall sections could be heated at the positions provided for the threaded hole.
- the fastening means comprises a projection integrally formed on one of the two upper wall sections and a recess formed correspondingly in a side wall section.
- the projection and the corresponding recess can be formed by uncomplicated geometries.
- the projection and the recess can already be done by simple punching on a flat sheet metal part, which is then formed in sheet metal bending process to the clamping sleeve.
- Another object of the invention is a method for producing the clamping sleeve. Advantageous developments to the production method according to the invention are given in the subsequent subclaims.
- Fig. 1 shows a terminal 1 with a housing made of insulating material.
- the terminal 1 consists of several modules 3, which are strung together in the width direction on their side walls.
- a screw with a clamping sleeve 5 is mounted electrically conductive material. It is used to clamp an electrical conductor 11, which is pushed into the clamping sleeve 5 via an opening 16 provided on the rear side of the housing 15 in the interior of the clamping sleeve 5, which is referred to as the receiving space.
- the clamping sleeve 5 itself is designed as a frame-shaped bent sheet metal part and has in the assembled state to the housing openings 7, 16 aligned openings.
- the clamping sleeve 5 is in Fig. 2 shown as a single part.
- the clamping sleeve 5 comprises a lower U-shaped wall section 17 with a bottom wall section 17.3 and a first side wall section 17.1 adjoining thereto and a second side wall section 17.2.
- Of each side wall portion 17.1, 17.2 each extending an upper wall portion 19.1, 19.2. They are arranged opposite to the bottom wall section 17.3 and run perpendicular to the Side wall sections 17.1, 17.2.
- the clamping sleeve 5 is thus formed in the manner of a box-shaped closed profile with two superposed upper wall sections 19.1, 19.2.
- Through the two upper wall portions 19.1, 19.2 a manufactured in flow molding threaded hole 21 is guided with collar-shaped projections 23. About this produced in flow molding threaded hole 21, the two upper wall portions 19.1, 19.2 are mechanically interconnected.
- This mechanical connection is due to the choice of the flow molding technique as a manufacturing process of the threaded hole 21, because in this method, that leached from the threaded hole 21 material is liquid and the leached material flows to the two axial hole ends and a material exchange takes place.
- the two upper wall sections are preferably approximately plan on each other and touch each other.
- a connector 25, 27 was selected. It comprises an integrally formed on the upper wall portion 19.2 projection 25 and a corresponding thereto arranged in the side wall portion 17.1 recess 27.
- all other known methods and devices such as gluing, riveting, welding, etc. can also serve as fastening means.
- tools designed to be separate from the clamping sleeve for holding the upper wall section which, for example, engage below the upper wall section, can also be used as fastening means.
- a flat sheet metal part is bent into a frame-like bent part with an upper wall portion 19 and an associated approximately U-shaped lower wall portion 17.
- the U-shaped wall portion 17 includes a bottom wall portion 17.3 with a first side wall portion 17.1 adjacent thereto and a second side wall portion 17.2.
- a first upper wall section 19.1 and an upper second wall section 19.2 are each deflected at right angles to the side wall sections 17.1, 17.2 in the direction of the respective opposite side wall.
- the bending axes of the two upper wall sections 19.1, 19.2 are offset from the bottom wall section 17.3 in the height direction of the respective side walls by approximately one sheet thickness of the clamping sleeve offset from one another.
- the bending of the two upper wall sections 19.1, 19.2 is carried out in succession.
- the second upper wall portion 19.2 is bent and its integrally formed projection 25 is inserted into the recess 27.
- the deformation of the first upper wall portion 19.1. He is due to its higher by a plate thickness arranged bending axis on the second upper wall portion 19.2 and touches this.
- the two upper superposed wall sections 19.1, 19.2 are drilled by cutting. This bore diameter is many times smaller than the diameter of the final threaded hole 21.
- the existing machined drilled bore is drilled with a specially designed flow drill in flow molding.
- part of the hot and liquid material dissolved out of the bore is transported by the drill up onto the upper side 29 of the upper wall section 19.1 and an upper collar-shaped projection 23.1 is formed.
- a portion of the hot, dissolved out of the bore material flows substantially controlled by the advance of the drill and the gravitational force first on the surface of the second upper wall portion 19.2.
- the solidified in this area material connects the two upper wall sections 19.1, 19.2.
- the bore is drilled in the second upper wall section 19.2. Also in this drilling process material is transported on the one hand by the rotation of the drill upwards in the direction of the top 29 again.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Description
Die Erfindung bezieht sich auf eine Klemmhülse für elektrische Leiter gemäß dem Oberbegriff des Anspruchs 1. Daneben betrifft die Erfindung gemäß dem Oberbegriff des Anspruchs 7 ein Verfahren zur Herstellung der Klemmhülse.The invention relates to a clamping sleeve for electrical conductors according to the preamble of claim 1. In addition, the invention according to the preamble of
Elektrische Anschlussklemmen, insbesondere Reihenklemmen, weisen ein Isolierstoffgehäuse mit bspw. als Zugfeder-, Direkt-, Schneid- oder Schaubanschluss ausgebildeten Anschlüssen zur Klemmung und Kontaktierung von elektrischen Leitern auf.
Elektrische Anschlussklemmen mit Schraubanschluss zeichnen sich durch ihre hohen und über Jahre konstant auf elektrische Leiter übertragbaren Klemmkräfte aus. Mit diesem Klemmentyp können vorgegebene hohe Klemmkräfte ohne Schwankungen sogar bei auf die elektrische Anschlussklemme wirkenden Vibrationen eingehalten werden.
Aufgrund dieser Eigenschaften werden elektrische Anschlussklemmen mit Schraubanschluss auch bei anspruchsvollen industriellen Anwendungen mit bewegten und schwingenden Maschinenteilen bevorzugt eingesetzt.Electrical connection terminals, in particular terminal blocks, have an insulating housing with, for example, designed as Zugfeder-, direct-, cutting or Schaub connection terminals for clamping and contacting of electrical conductors.
Electrical connection terminals with screw connection are characterized by their high clamping forces that can be continuously transmitted to electrical conductors over the years. With this type of terminal predetermined high clamping forces can be maintained without fluctuations even when acting on the electrical terminal vibration.
Due to these properties, electrical connection terminals with screw connection are also preferred in demanding industrial applications with moving and oscillating machine parts.
Eine elektrische Anschlussklemme mit Schraubanschluss umfasst eine in das Isolierstoffgehäuse montierte und durch elektrisch leitende Wandabschnitte gebildete Klemmhülse mit einem Aufnahmeraum für einen elektrischen Leiter. Einer der Wandabschnitte enthält mindestens eine bis in den Aufnahmeraum geführte Gewindebohrung mit je einer eingesetzten Schraube. Ihr Schraubenkopf ist über eine in dem Isolierstoffgehäuse vorgesehene Montageöffnung zugänglich, so dass die Schraube mit ihrer Spitze in den Aufnahmeraum gedreht werden kann und einen hierin eingeführten elektrischen Leiter klemmen kann.An electrical connection terminal with screw connection comprises a clamping sleeve mounted in the insulating housing and formed by electrically conductive wall sections and having a receiving space for an electrical conductor. One of the wall sections contains at least one guided into the receiving space threaded hole, each with a screw inserted. Your screw head is accessible via an opening provided in the insulating housing mounting opening so that the screw can be rotated with its tip into the receiving space and can clamp an electrical conductor inserted therein.
Derartige elektrische Anschlussklemmen mit Klemmhülsen und Schraubanschluss sind bspw. aus der
Da elektrische Anschlussklemmen mit Klemmhülsen Massenartikel sind, besteht die Forderung die Klemmhülsen mit geringsten Material und Herstellungskosten zu produzieren. Deshalb sind die Materialkosten für aus vollem Material gefertigte Klemmhülsen oftmals nicht mehr akzeptabel. Zur Senkung der Materialkosten ist es bereits aus der
Die Materialkosten sinken bei dieser Klemmhülse mit abnehmender Blechstärke des Blechbiegeteils. Die Blechstärke kann jedoch nur in gewissen Grenzen reduziert werden, weil mit abnehmender Blechstärke die Festigkeit der Klemmhülse-und somit die auf den elektrischen Leiter übertragbaren Klemmkräfte sinken. Der größte Einflussfaktor auf die übertragbaren Klemmkräfte bildet hierbei die axiale Länge der Gewindebohrung, welche der Blechstärke entspricht.
Abhilfe schafft hier eine aus der
The material costs decrease with this clamping sleeve with decreasing sheet thickness of the bent sheet metal part. However, the sheet thickness can only be reduced within certain limits, because with decreasing sheet thickness, the strength of the clamping sleeve and thus sink the transferable to the electrical conductor clamping forces. The largest influencing factor on the transferable clamping forces is the axial length of the threaded hole, which corresponds to the sheet thickness.
Remedy here creates a from the
Als wesentlicher Nachteil bei dieser Ausführung wird angesehen, dass die Klemmhülse mehrteilig ist und somit mehrere Werkzeuge zu ihrer Herstellung notwendig sind und die Fertigungskosten entsprechend hoch sind.
Eine allgemein bekannte alternative Lösung sieht zur Verlängerung der axialen Gewindelänge eine Gewindebohrung mit einem über das Blech ragenden Ansatz vor. Die zusätzliche Länge der Gewindebohrung ergibt sich durch die axiale Länge des Ansatzes. Eine derartige Gewindebohrung kann bspw. durch eine Lochung des Blechbiegeteils mit anschließendem Tiefziehverfahren Werkzeuge zu ihrer Herstellung notwendig sind und die Fertigungskosten entsprechend hoch sind.
Eine allgemein bekannte alternative Lösung sieht zur Verlängerung der axialen Gewindelänge eine Gewindebohrung mit einem über das Blech ragenden Ansatz vor. Die zusätzliche Länge der Gewindebohrung ergibt sich durch die axiale Länge des Ansatzes. Eine derartige Gewindebohrung kann bspw. durch eine Lochung des Blechbiegeteils mit anschließendem Tiefziehverfahren erzielt werden. Auch diese Herstellung ist aufgrund der zahlreichen Verfahrensschritte zeitaufwendig und teuer.A major disadvantage of this design is considered that the clamping sleeve is multi-part and thus several tools are necessary for their production and the manufacturing costs are correspondingly high.
A well-known alternative solution provides for extending the axial thread length a threaded bore with a projecting beyond the sheet approach. The additional length of the threaded hole results from the axial length of the neck. Such a threaded hole can, for example. By punching the sheet metal part followed by thermoforming Tools are necessary for their production and the manufacturing costs are correspondingly high.
A well-known alternative solution provides for extending the axial thread length a threaded bore with a projecting beyond the sheet approach. The additional length of the threaded hole results from the axial length of the neck. Such a threaded hole can be achieved, for example, by punching the sheet-metal bent part followed by a deep-drawing process. This production is time-consuming and expensive due to the numerous process steps.
Aus der
Bei dieser Klemmhülse ist die Länge der Gewindebohrung entsprechend der axialen Länge der kragenförmigen Ansätze gegenüber der Blechstärke des oberen Wandabschnitts vergrößert worden. Zudem ist die Klemmhülse einstückig ausgebildet und kann somit kostengünstig gefertigt werden.In this clamping sleeve, the length of the threaded bore has been increased in accordance with the axial length of the collar-shaped projections relative to the plate thickness of the upper wall portion. In addition, the clamping sleeve is integrally formed and can thus be manufactured inexpensively.
Aus der
Nachteilig daran ist, dass die beiden oberen Wandabschnitte nicht miteinander mechanisch verbunden sind, wie dies z.B. bei einer kastenförmigen Klemme der Fall ist, die aber die anderen oben beschriebenen Nachteile aufweist.The disadvantage of this is that the two upper wall sections are not mechanically connected to each other, as e.g. is the case with a box-shaped clamp, but has the other disadvantages described above.
Ausgehend von dieser Klemmhülse liegt der Erfindung die Aufgabe zugrunde, eine Klemmhülse mit Gewindeloch zu offenbaren, mit der noch höhere Klemmkräfte auf zu klemmende elektrische Leiter übertragen werden können.Based on this clamping sleeve, the invention has for its object to disclose a clamping sleeve with threaded hole, with the even higher clamping forces can be transmitted to clamped to electrical conductors.
Die Erfindung löst die Aufgabe durch eine Klemmhülse mit den Merkmalen des Anspruchs 1.The invention solves the problem by a clamping sleeve with the features of claim 1.
Die erfindungsgemäße Klemmhülse nach Anspruch 1 umfasst ein Blechbiegeteil mit einem oberen Wandabschnitt und einen damit verbundenen ersten Seitenwandabschnitt und zweiten Seitenwandabschnitt.The clamping sleeve according to the invention according to claim 1 comprises a Sheet metal bending part with an upper wall portion and a first side wall portion and second side wall portion connected thereto.
In dem oberen Wandabschnitt der Klemmhülse ist mindestens ein Gewindeloch mit kragenförmigen Ansätzen ausgebildet. Damit noch höhere Klemmkräfte auf in die Klemmhülse eingeführte elektrische Leiter übertragen werden können, ist die axiale Länge des Gewindelochs dadurch verlängert worden, dass zwei übereinander angeordnete und jeweils von den beiden Seitenwandabschnitten umgelenkte obere Wandabschnitte vorgesehen sind, wobei das Gewindeloch durch die beiden oberen Wandabschnitte hindurchgeführt ist und diese miteinander mechanisch verbindet. Dabei ist dass Gewindeloch durch Fließformtechnik hergestellt, sodass die beiden oberen Wandabschnitte miteinander mechanisch durch den bei der Fließformtechnik erfolgenden Materialaustausch des herausgelösten Materials miteinander verbunden sind.In the upper wall portion of the clamping sleeve at least one threaded hole is formed with collar-shaped projections. So that even higher clamping forces can be transmitted to electrical conductors introduced into the clamping sleeve, the axial length of the threaded hole has been lengthened by providing two upper wall sections arranged one above the other and each deflected by the two side wall sections, with the threaded hole passing through the two upper wall sections is and connects them mechanically. In this case, the threaded hole is produced by flow molding technology, so that the two upper wall sections are connected to one another mechanically by the material exchange of the dissolved material taking place during the flow molding technique.
Durch die erfindungsgemäße Klemmhülse mit genau zwei oberen Wandabschnitten wird die axiale Länge des Gewindelochs gegenüber der bekannten Klemmhülse aus der
Hierdurch wird insbesondere mit immer höher festen Materialien für die Klemmhülse der Vorteil erreicht, dass die Klemmkräfte gegenüber der bekannten Klemmhülse aus der
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous developments of the invention will become apparent from the dependent claims.
Eine besondere Weiterbildung der Erfindung sieht vor, dass die beiden oberen Wandabschnitte näherungsweise plan aufeinander aufgrund der bei der Gewindelochherstellung induzierten Schwingungen zwischen den beiden oberen Wandabschnitten erwartet worden.A particular embodiment of the invention provides that the two upper wall sections approximately plan on each other due to the induced in the threaded hole production oscillations between the two upper wall sections has been expected.
Durch diese besondere vorteilhafte Weiterbildung, bei der die beiden oberen Wandabschnitte näherungsweise plan aufeinander liegen, gelingt es, sogar mit zwei oberen Wandabschnitten den Aufnahmeraum der Klemmhülse ausreichend groß auszubilden, ohne hierfür die Seitenwandabschnitte besonders hoch ausführen zu müssen. Ferner wird durch die beiden näherungsweise plan aufeinander liegenden oberen Wandabschnitte erreicht, dass die mechanische Verbindung zwischen den beiden oberen Wandabschnitten wesentlich fester ist; als bei zwei obere, durch einen Spalt getrennte Wandabschnitte.By this particular advantageous development in which the two upper wall sections are approximately planar to each other, it is possible, even with two upper wall sections, the receiving space of the clamping sleeve sufficiently large form, without having to carry out the side wall sections particularly high. Furthermore, it is achieved by the two approximately plan superposed upper wall sections that the mechanical connection between the two upper wall sections is much firmer; as in two upper, separated by a gap wall sections.
Zur Fixierung der Position von mindestens einem der beiden oberen Wandabschnitte ist in vorteilhafter Weise ein Befestigungsmittel an der Klemmhülse vorgesehen. Hierdurch wird erreicht, dass beide oberen Wandabschnitte auch bei der Fertigung des Gewindelochs ihre Position exakt einhalten können und nicht verformt werden oder gar in den Aufnahmeraum gedrückt werden.For fixing the position of at least one of the two upper wall sections, a fastening means is provided on the clamping sleeve in an advantageous manner. This ensures that both upper wall sections can comply exactly with their position even in the production of the threaded hole and are not deformed or even pressed into the receiving space.
Alternativ könnten zur Fixierung die oberen Wandabschnitte an den für das Gewindeloch vorgesehenen Positionen erhitzt werden.Alternatively, for fixation, the upper wall sections could be heated at the positions provided for the threaded hole.
Besonders einfach und kostengünstig kann eine Fixierung der beiden oberen Wandabschnitte erreicht werden, wenn das Befestigungsmittel ein endseitig an einem der beiden oberen Wandabschnitte angeformten Vorsprung sowie eine hierzu korrespondierend in einem Seitenwandabschnitt ausgebildete Ausnehmung umfasst. Dies ist fertigungstechnisch günstig, weil der Vorsprung sowie die korrespondierende Ausnehmung durch unkomplizierte Geometrien gebildet werden können. Somit können der Vorsprung und die Ausnehmung bereits durch einfache Ausstanzungen an einem flachen Blechteil erfolgen, welches dann im Blechbiegeverfahren zur Klemmhülse geformt wird.Fixing of the two upper wall sections can be achieved in a particularly simple and cost-effective manner if the fastening means comprises a projection integrally formed on one of the two upper wall sections and a recess formed correspondingly in a side wall section. This is favorable in terms of production because the projection and the corresponding recess can be formed by uncomplicated geometries. Thus, the projection and the recess can already be done by simple punching on a flat sheet metal part, which is then formed in sheet metal bending process to the clamping sleeve.
Weiterer Gegenstand der Erfindung ist ein Verfahren zur Herstellung der Klemmhülse. Vorteilhafte Weiterentwicklungen zu dem erfindungsgemäßen Herstellungsverfahren sind in den anschließenden Unteransprüchen angegeben.Another object of the invention is a method for producing the clamping sleeve. Advantageous developments to the production method according to the invention are given in the subsequent subclaims.
Die erfindungsgemäße Klemmhülse sowie das Verfahren zur Herstellung dieser sind nachfolgend an Hand eines Ausführungsbeispiels beschrieben und zeichnerisch dargestellt. In der Zeichnung zeigen
- Fig. 1
- eine aus mehreren Modulen bestehende elektrische Anschlussklemme mit Schaubanschlüssen in perspektivischer Darstellung, wobei das vorderste Modul im Schnitt mit Blick auf den Schraubanschluss, der Klemmhülse sowie einen eingeführten Leiter dargestellt ist
und - Fig. 2
- in perspektivischer Ansicht die Klemmhülse der Anschlussklemme von
Fig. 1 .
- Fig. 1
- a multi-module electrical terminal with Schaubanschlüssen in perspective view, wherein the foremost module is shown in section with a view of the screw, the ferrule and an inserted conductor
and - Fig. 2
- in perspective view, the clamping sleeve of the terminal of
Fig. 1 ,
Die Klemmhülse 5 selbst ist rahmenförmig als Blechbiegeteil ausgeführt und weist im montierten Zustand zu den Gehäuseöffnungen 7, 16 fluchtend ausgeführte Öffnungen auf.The clamping sleeve 5 itself is designed as a frame-shaped bent sheet metal part and has in the assembled state to the
Die Klemmhülse 5 ist in
Diese mechanische Verbindung ist durch die Wahl der Fließformtechnik als Herstellungsverfahrens des Gewindelochs 21 begründet, weil bei diesem Verfahren, dass aus dem Gewindeloch 21 herausgelöste Material flüssig ist und das herausgelösten Material zu den beiden axialen Lochenden fließt und ein Materialaustausch stattfindet.This mechanical connection is due to the choice of the flow molding technique as a manufacturing process of the threaded
Um eine besonders stabile Verbindung zwischen den beiden oberen Wandabschnitten 19.1, 19.2 sowie einen möglichst großen Klemmenraum zu erzielen, liegen die beiden oberen Wandabschnitte vorzugsweise näherungsweise plan aufeinander und berühren einander.In order to achieve a particularly stable connection between the two upper wall sections 19.1, 19.2 and the largest possible terminal space, the two upper wall sections are preferably approximately plan on each other and touch each other.
Zur Fixierung der vorbeschriebenen Lage der beiden oberen Wandabschnitte 19.1, 19.2 zueinander ist vorgesehen, dass eine der beiden oberen Wandabschnitte 19.1, 19.2 zumindest vor Herstellung der Gewindebohrung über Befestigungsmittel gehalten wird. Als Befestigungsmittel wurde in vorliegenden Ausführung eine Steckverbindung 25, 27 gewählt. Sie umfasst einen endseitig an dem oberen Wandabschnitt 19.2 angeformten Vorsprung 25 sowie eine hierzu korrespondierend in dem Seitenwandabschnitt 17.1 angeordnete Ausnehmung 27. Neben der in
Bei der Herstellung der Klemmhülse 5, wird ein flaches Blechteil zu einem rahmenartigen Biegeteil mit einem oberen Wandabschnitt 19 und einem damit verbundenen etwa U-förmigen unteren Wandabschnitt 17 gebogen. Der U-förmige Wandabschnitt 17 enthält einen Bodenwandabschnitt 17.3 mit einem hieran angrenzenden ersten Seitenwandabschnitt 17.1 und einem zweiten Seitenwandabschnitt 17.2. Von den beiden Seitenwandabschnitten 17.1, 17.2 werden jeweils ein erster oberer Wandabschnitt 19.1 und ein oberer zweiter Wandabschnitt 19.2 im rechten Winkel zu den Seitenwandabschnitten 17.1, 17.2 in Richtung auf die jeweils gegenüberliegende Seitenwand umgelenkt. Die Biegeachsen der beiden oberen Wandabschnitte 19.1, 19.2 sind von dem Bodenwandabschnitt 17.3 in Höhenrichtung der jeweiligen Seitenwände um ca. eine Blechstärke der Klemmhülse versetzt zueinander angeordnet. Hierdurch wird erreicht, dass die beiden parallel angeordneten oberen Wandabschnitte plan aufeinander liegen und einander berühren.
Vorzugsweise wird die Biegung der beiden oberen Wandabschnitte 19.1, 19.2 nacheinander ausgeführt. Erst wird der zweite obere Wandabschnitt 19.2 umgebogen und sein endseitig angeformter Vorsprung 25 wird in die Ausnehmung 27 gesteckt. Anschließend erfolgt die Umformung des ersten oberen Wandabschnitts 19.1. Er liegt durch seine um eine Blechstärke höher angeordnete Biegeachse auf den zweiten oberen Wandabschnitt 19.2 und berührt diesen. Nach Durchführung der Biegevorgänge werden die beiden oberen übereinander liegenden Wandabschnitte 19.1, 19.2 spanabhebend durchbohrt. Dieser Bohrungsdurchmesser ist um ein Vielfaches kleiner ist als der Durchmesser des finalen Gewindelochs 21. Anschließend wird mit einem speziell ausgebildeten Fließbohrer in Fließformtechnik die bestehende spanabhebend durchgeführte Bohrung aufgebohrt. Während des Bohrvorgangs wird ein Teil des aus der Bohrung herausgelösten heissen und flüssigen Materials durch den Bohrer nach oben auf die Oberseite 29 des oberen Wandabschnitts 19.1 transportiert und ein oberer kragenförmiger Ansatz 23.1 gebildet. Andererseits fließt ein Teil des heißen, aus der Bohrung herausgelösten Materials, im Wesentlichen durch den Vorschub des Bohrers und der Gravitationskraft gesteuert zunächst auf die Oberfläche des zweiten oberen Wandabschnitts 19.2. Das in diesem Bereich erstarrte Material verbindet die beiden oberen Wandabschnitte 19.1, 19.2. Im weiteren Verlauf des Fließbohrens wird die Bohrung im zweiten oberen Wandabschnitt 19.2 aufgebohrt. Auch bei diesem Bohrvorgang wird erneut einerseits Material durch die Drehung des Bohrers nach oben in Richtung der Oberseite 29 transportiert. Andererseits wird auch ein Teil des aus der Bohrung herausgelösten flüssigen heissen Materials nach unten in Richtung des Bodenwandabschnitts 17.3 gefördert, so dass ein zweiter Ansatz 23.2 gebildet wird. Ferner findet durch die unterschiedlichen Fließrichtungen des heissen Materials ein Materialaustausch statt. Durch den Materialaustausch im Übergangsbereich der die beiden oberen Wandabschnitte werden diese miteinander verbunden.In the manufacture of the clamping sleeve 5, a flat sheet metal part is bent into a frame-like bent part with an upper wall portion 19 and an associated approximately U-shaped lower wall portion 17. The U-shaped wall portion 17 includes a bottom wall portion 17.3 with a first side wall portion 17.1 adjacent thereto and a second side wall portion 17.2. Of the two side wall sections 17.1, 17.2, a first upper wall section 19.1 and an upper second wall section 19.2 are each deflected at right angles to the side wall sections 17.1, 17.2 in the direction of the respective opposite side wall. The bending axes of the two upper wall sections 19.1, 19.2 are offset from the bottom wall section 17.3 in the height direction of the respective side walls by approximately one sheet thickness of the clamping sleeve offset from one another. This ensures that the two upper wall sections arranged in parallel lie flat on one another and touch each other.
Preferably, the bending of the two upper wall sections 19.1, 19.2 is carried out in succession. First, the second upper wall portion 19.2 is bent and its integrally formed
Claims (10)
- A clamping piece (5) for electrical conductors (11) consisting of a bent sheet-metal component with an upper wall section (19) and a first side wall section (17.1) and a second side wall section (17.2) connected to it,
wherein the upper wall section (19) has at least one tapped hole (21) with a collar-shaped appendages (23.1, 23.2), wherein two upper wall sections (19.1, 19.2) are provided, these being disposed above one another and deflected by the two side wall sections (17.1, 17.2),respectively,
characterised in that
the tapped hole (21) is produced by means of flow forming technology and passed through the two upper wall sections (19.1, 19.2), so that the two upper wall sections (19.1, 19.2) are mechanically connected to one another. - The clamping piece (5) according to claim 1,
characterised in that
the two upper wall sections (19.1, 19.2) lie approximately flat on top of one another. - The clamping piece (5) according to claim 2,
characterised in that
the collar-shaped appendages (23.1, 23.2) are disposed solely on the outer surfaces of the two upper wall sections (19.1, 19.2) that are facing away from one another. - The clamping piece (5) according to at least one of the foregoing claims,
characterised in the
a fixing means is provided on the clamping piece (5), in order to fix the position of at least one of the two upper wall sections (19.1, 19.2). - The clamping piece (5) according to claim 4,
characterised in that
the fixing means consists of a lug (25) moulded at the end to one of the two upper wall sections (19.1, 19.2) and also a recess (27) corresponding to this made in a side wall section (17.1). - The clamping piece (5) according to at least one of the claims 4 to 5,
characterised in that
adhesive is provided as the fixing means. - A method of producing a clamping piece (5), in which a flat piece of sheet metal is bent into a bent sheet-metal component with an upper wall section (19) and a first side wall section (17.1) and second side wall section (17.2) attached to it and at least one tapped hole (21) with collar-shaped appendages (23.1, 23.2) is inserted in the upper wall section (19),
wherein starting from the first side wall section (17.1) and the second side wall section (17.2) in each case, the upper wall sections (19.1, 19.2) are bent such that they are disposed parallel above one another and are in contact with each other,
characterised in that
a shared tapped hole produced by flow forming is then inserted through the two upper wall sections (19.1, 19.2), so that the two upper wall sections (19.1, 19.2) are mechanically connected to one another. - The method of producing a clamping piece (5) according to claim 7,
characterised in that
before the shared tapped hole is inserted, at least one of the two upper wall sections (19.1, 19.2) is fixed. - The method of producing a clamping piece (5) according to claim 8,
characterised in that
fixing means are applied to the upper wall section (19.2) being fixed, in order to fix at least one of the two upper wall sections (19.1, 19.2), particularly as tools formed separately from the clamping piece (5). - The method of producing a clamping piece (5) according to at least one of the claims 8 to 9,
characterised in that
adhesive is applied to at least one of the upper wall sections (19.1, 19.2) in order to fix it.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06024390A EP1926178B1 (en) | 2006-11-24 | 2006-11-24 | Clamping sleeve and method of manufacturing the same |
DE502006003840T DE502006003840D1 (en) | 2006-11-24 | 2006-11-24 | Clamping sleeve for electrical conductors and method for producing these |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06024390A EP1926178B1 (en) | 2006-11-24 | 2006-11-24 | Clamping sleeve and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1926178A1 EP1926178A1 (en) | 2008-05-28 |
EP1926178B1 true EP1926178B1 (en) | 2009-05-27 |
Family
ID=37879451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06024390A Active EP1926178B1 (en) | 2006-11-24 | 2006-11-24 | Clamping sleeve and method of manufacturing the same |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1926178B1 (en) |
DE (1) | DE502006003840D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102780102A (en) * | 2012-07-26 | 2012-11-14 | 上海友邦电气(集团)股份有限公司 | Wire pressing frame for low-voltage apparatus |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1227969B (en) * | 1961-05-20 | 1966-11-03 | Josef Eisert | Terminal block with a huelsen-shaped terminal body formed from a sheet metal strip through edges |
GB1295391A (en) * | 1971-03-25 | 1972-11-08 | ||
DE4032538A1 (en) * | 1990-10-13 | 1992-04-16 | Abb Patent Gmbh | TERMINAL FOR A SWITCHGEAR |
US6074121A (en) | 1997-06-30 | 2000-06-13 | Thomas & Betts Corporation | Fastening lug |
DE20310459U1 (en) | 2003-07-08 | 2004-11-18 | Adels-Contact Elektrotechnische Fabrik Gmbh & Co. Kg | Terminal body for porcelain terminal, has collar-like fittings formed on both sides of threaded opening in wall section using flow forming technology and with internal threads |
-
2006
- 2006-11-24 EP EP06024390A patent/EP1926178B1/en active Active
- 2006-11-24 DE DE502006003840T patent/DE502006003840D1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1926178A1 (en) | 2008-05-28 |
DE502006003840D1 (en) | 2009-07-09 |
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