DE202016106269U1 - Contact element with a clamping connection for stranded conductors - Google Patents

Abstract

Spring-loaded clamping element (5) with a clamping spring arm (6) for clamping contacting of a stranded conductor end between the clamping surface (40) of a contacting section (4) of a connection block (9) of a contact element (1) and the clamping spring arm (6), wherein the clamping element (5) at least one holding arm (50) having an end-side Umgriffabschnitt (51) to secure the resilient clamping element (5) on the terminal block (9) of the contact element (1) with positive locking.

Description

The invention relates to an electrical contact element according to claim 1.

The invention therefore relates in particular to an electrical contact element having a connection for stranded conductors, wherein the contact element has a specifically shaped and actuated contact spring which can be transferred into a position clamping the stranded conductor and in the clamping position contacts the preferably stripped end of a stranded conductor in a clamping manner.

Such contact elements are provided, in particular in the field attachable connections with stranded cables both mechanically fixed and electrically reliable to connect to the contact element, which must also be ensured that high tensile forces, mechanical influences and vibrations must not cause unwanted separation of the connection.

Thus, it is known in the prior art, for example, that stranded conductors are connected to contact elements with crimped connections or alternatively stranded conductors can be connected to contact elements, in which a conical contact part in a contact element presses the stranded conductors by means of axially or radially acting forces onto a corresponding shaped counter surface, the angles of the conical surfaces are usually the same.

In the prior art, for example, such a contact element for connecting stranded conductor described in the DE 89 14 460 U1 disclosed.

Furthermore, in the DE 197 18 004 C1 discloses a contact system consisting of a female part and a plug part with resilient contact blades, for the transmission of high currents.

In the FR 618 171 A discloses devices which are suitable for clamping electrical conductors for electrical equipment, in which in particular sheathed electrical conductors are clamped in insulating devices for mounting.

Furthermore, in the DE 102 20 108 B4 discloses a contact element for connecting a stranded conductor, wherein the contact element is formed from a clamping sleeve and a screw-retained in the clamping sleeve, mandrel-like contact part, wherein the contact part has a conical tip at an angle α to the vertical and on the clamping sleeve is a funnel-shaped connection end, in which the stranded conductor is insertable into an inner connection chamber and further wherein a conical surface is formed at an angle β to the vertical and the contact part but only as far into the connection chamber and the inserted therein stranded conductor is screwed that between the tip of the contact part and the conical surface of the Shoulder a minimum overlap remains.

This technical teaching discloses a contact element, in which the stranded wire end, however, is pressed by the clamping sleeve against a side wall and there is a risk that the ends of the stranded conductors are damaged during pressing or even severed. In particular, when screwing the clamping sleeve arise high forces that can shear off the stranded conductors partially or completely, but this remains undetected in the worst case.

Object of the present invention

The invention is therefore based on the object to form a safe and easy to produce connection between a contact element of the type mentioned and a stranded conductor to the effect that vorbesagte disadvantages are overcome and the stranded wire is held next to an optimal electrical contact connection, especially safe in vibration and a high pull-out safety is ensured in the contact element.

This object is achieved by an electrical contact element with a spring part having the features of claim 1.

A basic idea of the invention is to provide a contact element with a resilient clamping element, wherein the clamping element has a contact arm engaging around the contact element and a clamping spring arm for contacting a stranded conductor.

In this way, the clamping element z. B. be attached to a contact with a screw terminal block suitable contour and a screwless, namely clamping contact of a stranded conductor can be made with a contact surface of the terminal block.

An aspect of the invention therefore relates to a resilient clamping element with a clamping spring arm for clamping contacting a stranded conductor between the clamping surface of a Kontaktierungsabschnitts a terminal block of a contact element and the Klemmfederarm, wherein the clamping element has at least one support arm with an end Umgriffabschnitt to the resilient clamping element on the terminal block of To attach contact element.

A further aspect of the present invention relates to an electrical contact element for clamping or contacting a stranded conductor, comprising a contact pin and a contacting portion, which has an outer clamping surface and on whose outer jacket a resilient clamping element is attached, which with a Klemmfederarm, designed for clamping contact of a stranded conductor end between the clamping surface of the Kontaktierungsabschnitts and the Klemmfederarm, is formed, wherein the Klemmfederarm is pressed feathers when inserting a stranded conductor from a Litzenleitereinführposition in a Litzenleiterklemmposition.

In a preferred embodiment of the invention, it is provided that the clamping element is fastened to the contact element by means of at least one holding arm which at least partially surrounds the contacting section of the contact pin.

• – der wenigstens eine Haltearm ist am Klemmelement mit einem endseitigen umgebogenen Umgriffabschnitt ausgebildet;
• – die Form des Umgriffabschnitts stellt eine teilkreisbogenförmige Umbiegung des Klemmfederarms dar, vorzugsweise mit einem Teilkreissegment zwischen 90° und 180°, weiter vorzugsweise zwischen 100° und 135°;
• – die Außenkontur des Kontaktstiftes im Befestigungsbereich des Kontaktierungsabschnitt ist zylindermantelförmig oder teilzylindermantelförmig ausgebildet;
• – der Klemmfederarm weist einen nicht federnden Halteabschnitt auf und ein federnder Klemmarmabschnitt des Klemmfederarms ragt in Richtung des Kontaktstifts;
• – der oder die Haltearme sind als im Wesentlichen streifenförmige und endseitig umgebogene Blechzungen ausgebildet, welche mit ihrem einen Haltearmende abgewinkelt über eine Biegestelle mit dem Klemmfederarm verbunden sind;
• – zwei Haltearme umgreifen den Kontaktierungsabschnitt des Kontaktstiftes mit einem Umgriffabschnitt von gleichen Seiten oder alternativ von unterschiedlichen, vorzugsweise gegenüberliegenden Seiten, wodurch eine besonders gute Umklammerung erzielt werden kann;
• – der Umgriffabschnitt ist in einer L- oder C-Form ausgebildet, so dass dieser beispielsweise auch kastenförmige Kontaktelemente umgreifen kann;
• – es kann eine Kontaktkammer (mit einem Aufnahmeraum für den Litzenleiter) mit einer innen liegenden Klemmfläche vorgesehen werden, wobei dann der Klemmfederarm durch eine Öffnung der Kontaktkammer in die Kontaktkammer hineinragt.

Further advantageous embodiments and features are as follows, which can be used both individually and in combination:

• - The at least one support arm is formed on the clamping element with an end-side bent Umgriffabschnitt;
• - The shape of the Umgriffabschnitts represents a partial arc-shaped bend of the Klemmfederarms, preferably with a pitch circle segment between 90 ° and 180 °, more preferably between 100 ° and 135 °;
• - The outer contour of the contact pin in the attachment region of the contacting portion is formed in the form of a cylinder jacket or partially cylindrical jacket;
• - The clamping spring arm has a non-resilient retaining portion and a resilient Klemmarmabschnitt the Klemmfederarms protrudes in the direction of the contact pin;
• - The one or more holding arms are formed as substantially strip-shaped and end bent bent sheet metal tongues, which are angled with its one arm at a bending point connected to the Klemmfederarm;
• - Two holding arms engage around the contacting portion of the contact pin with a Umgriffabschnitt of the same sides or alternatively of different, preferably opposite sides, whereby a particularly good clinging can be achieved;
• - The Umgriffabschnitt is formed in an L- or C-shape, so that this can embrace, for example, box-shaped contact elements;
• - It can be provided with an inner clamping surface, a contact chamber (with a receiving space for the stranded conductor), in which case the Klemmfederarm protrudes through an opening of the contact chamber into the contact chamber.

The invention will be explained in more detail below with reference to a preferred embodiment in conjunction with the figures. Showing:

1a to 1d a first embodiment of a contact element according to the invention with an embodiment of a clamping element;

2a to 2d a second embodiment of a contact element according to the invention with an embodiment of a clamping element;

3a to 3d a third embodiment of a contact element according to the invention with an embodiment of a clamping element;

4a to 4d A fourth embodiment of a contact element according to the invention with an embodiment of a clamping element;

5 an alternative embodiment of a contact element according to the invention in a sectional view;

6 the contact element according to 5 in a perspective view;

7 an embodiment of a clamping element according to the invention.

The invention will be described below with reference to 1 to 7 described in greater detail, wherein like reference numerals designate the same functional and / or structural features.

In the 1a . 1b . 2a . 2 B . 3a . 3b and 4a . 4b are each embodiments of a contact element according to the invention 1 shown and in the 1c . 1d . 2c . 2d . 3c . 3d and 4c . 4d are each clamping elements 5 the aforementioned embodiments of the contact elements 1 shown.

The electrical contact element 1 is formed of an elongated cylindrical contact pin 2 , to which a massive contacting section 4 connects, as in the embodiments of the electrical contact elements 1 of the 1 to 4 is shown. The contacting section 4 is as a terminal block 9 formed, wherein the contacting portion 4 each an external clamping surface 40 that points in the direction of the Klemmfederarms 6 of the clamping element 5 has. On the outer jacket 41 of the contacting section 4 of electrical contact element 1 is an outer jacket 41 encompassing resilient clamping element 5 attached.

In the 1c . 1d . 2c . 2d . 3c . 3d . 4c . 4d are four embodiments of clamping elements 5 shown. The clamping elements 5 are designed such that these via a Klemmfederarm 6 have for the clamping contact of a stranded conductor between the clamping surface 40 of the contacting section 4 of the electrical contact element 1 and the contacting region of the clamping spring arm 6 , The clamp spring arm 6 This is when inserting a stranded conductor in the 1a and 1b from the top of a Litzenleitreinführposition in a ladder clamping position resiliently actuated by the Klemmfederarm 6 of the clamping element 5 towards its holding section 60 is actuated, the stranded conductor is against the clamping surface 40 Federkraftbeaufschlagt by the clamping spring arm 6 pressing pressed. In this way, you can realize a werkezuglosen contact.

As in the embodiments of the 1 to 4 seen, has the resilient clamping element 5 next to the clamp spring arm 6 furthermore at least one holding arm 50 on, with an end trained Umgriffabschnitt 51 , so that the resilient clamping element 5 with these holding arms 50 namely with the Umgriffabschnitt 51 at the terminal block 9 of the contact element 1 can be fastened with positive locking. For this lies the Umgriffabschnitt 51 at the corresponding corresponding outer contour of the Kontaktierungsabschnitts 4 at the connection block 9 of the contact element 1 at.

In the embodiments according to the 2c . 2d and 4c . 4d has the clamping element 5 two holding arms each 50 with a bent-over Umgriffabschnitt 51 on, in which 2 the wraparound is done from the same side while in the embodiment according to 4 the two retaining arms 50 the contacting section 4 of the contact element 1 with their Umgriffabschnitten 51 embrace coming from different and opposite sides.

In the 5 to 7 is a further alternative embodiment of an electrical contact element according to the invention 1 shown with the in 7 according to the invention alternatively formed clamping element 5 , The clamping element 5 has the same as the previously described clamping elements 5 also via a support arm 50 that is angled over a bend 53 with the clamp spring arm 6 connected is. However, the Umgriffabschnitt 51 in this embodiment, a C-shaped form. Furthermore, the electrical contact element 1 formed so that the contacting section 4 a contact chamber 43 with an internal clamping surface 40 forms and the Klemmfederarm 6 of the clamping element 5 through an opening 44 the contact chamber 43 in the contact chamber 43 protrudes. In this embodiment, the stranded conductor would pass through the upper opening 44 the contact chamber 43 in the contact chamber 43 pressed in and pushes the clamp spring arm 6 from his in 5 shown Litzenleitereinführposition in a conductor clamping position, wherein the stranded conductor between the Klemmfederarm 6 and the opposite clamping surface 40 in the contact chamber 43 is contacted by clamping.

In the 1 to 4 have the electrical contact elements 1 in the attachment region of the contacting section 4 a cylinder jacket-shaped shape, so that the Umgriffabschnitte 51 with a positive connection at the contacting section 4 issue.

In a similar manner, the clamping element 5 according to 7 on the electrical contact element 1 according to 6 fastened, in which the Umgriffabschnitt 51 around the outer contour of the here essentially box-shaped contacting section 4 attacks.

However, the invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, a number of variants and embodiments are conceivable, which makes use of the illustrated solution and the illustrated method even with fundamentally different type of execution.

LIST OF REFERENCE NUMBERS

1

contact element

2

pin

4

contacting section

5

clamping element

6

Klemmfederarm

9

terminal block

40

clamping surface

41

outer sheath

43

contact chamber

44

opening

45

insertion

50

holding arm

51

Umgriffabschnitt

52

Haltearmende

53

bend

60

holding section

61

clamper arm

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 8914460 U1 [0005]
• DE 19718004 C1 [0006]
• FR 618171 A [0007]
• DE 10220108 B4 [0008]

Claims (11)

Spring-loaded clamping element ( 5 ) with a clamping spring arm ( 6 ) for the clamping contacting of a stranded conductor end between the clamping surface ( 40 ) of a contacting section ( 4 ) of a terminal block ( 9 ) of a contact element ( 1 ) and the clamping spring arm ( 6 ), wherein the clamping element ( 5 ) at least one holding arm ( 50 ) with an end-side wrap-around section ( 51 ), to the resilient clamping element ( 5 ) on the terminal block ( 9 ) of the contact element ( 1 ) with positive locking. Electrical contact element ( 1 ) for the clamping connection of a stranded conductor, consisting of a contact pin ( 2 ) and an associated contacting section ( 4 ), which has an external clamping surface ( 40 ) and on its outer shell ( 41 ) a resilient clamping element ( 5 ) is attached according to claim 1, such that this with his Klemmfederarm ( 6 ) for the clamping contacting of a stranded conductor end between the clamping surface ( 40 ) of the contacting section ( 4 ) and the clamping spring arm ( 6 ) is provided, wherein the clamping spring arm ( 6 ) is actuated when inserting a stranded conductor of a Litzenleitereinführposition in a Litzenleiterklemmposition springs. Electrical contact element ( 1 ) according to claim 2, characterized in that the clamping element ( 5 ) by means of at least one contacting section ( 4 ) of the contact pin ( 2 ) at least partially outside embracing support arm ( 50 ) on the contact element ( 1 ) is attached. Electrical contact element ( 1 ) according to claim 2 or 3, characterized in that the at least one holding arm ( 50 ) on the clamping element ( 5 ) with an end-bent bent over portion ( 51 ) is trained. Electrical contact element ( 1 ) according to claim 4, characterized in that the shape of the Umgriffabschnitts ( 51 ) a partial arc-shaped bend of the Klemmfederarms ( 6 ), preferably with a partial circle segment between 90 ° and 180 °, more preferably between 100 ° and 135 °. Electrical contact element ( 1 ) according to one of claims 3 to 5, characterized in that the outer contour of the contact pin ( 2 ) in the attachment region of the contacting section ( 4 ) Is formed cylindrical barrel-shaped. Electrical contact element ( 1 ) according to one of the preceding claims, characterized in that the clamping spring arm ( 6 ) a non-resilient holding section ( 60 ), and a resilient Klemmarmabschnitt ( 61 ) of the clamping spring arm ( 6 ) in the direction of the contact pin ( 2 protrudes. Electrical contact element ( 1 ) according to one of the preceding claims 3 to 7, characterized in that the holding arm or arms ( 50 ) are formed as substantially strip-shaped and end bent bent sheet metal tongues, which with its one holding arm end ( 52 ) angled over a bend ( 53 ) with the clamping spring arm ( 6 ) are connected. Electrical contact element ( 1 ) according to one of the preceding claims, characterized in that the two retaining arms ( 50 ) the contacting section ( 4 ) of the contact element ( 1 ) with a wrap-around section ( 51 ) from the same sides or from different, preferably opposite sides coming encompassing. Electrical contact element ( 1 ) according to one of the preceding claims 2 to 4 or 7 to 9, characterized in that the Umgriffabschnitt ( 51 ) is formed in an L or C shape. Electrical contact element ( 1 ) according to claim 10, characterized in that the contacting section ( 4 ), which has a contact chamber ( 43 ) with an internal clamping surface ( 40 ) and the clamping spring arm ( 6 ) through an opening ( 44 ) of the contact chamber ( 43 ) into the contact chamber ( 43 ) protrudes.

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