WO2015085992A1

WO2015085992A1 - Plug connector with single wire seal with strain relief

Info

Publication number: WO2015085992A1
Application number: PCT/DE2014/100429
Authority: WO
Inventors: Hartmuth Schmidt; Stephan Schreier; Kerstin HARLASS
Original assignee: HARTING Electronics GmbH
Priority date: 2013-12-11
Filing date: 2014-12-04
Publication date: 2015-06-18
Also published as: DE102013113878B4; DE102013113878A1

Abstract

The invention relates to a plug connector (1) comprising a base body (2), a cable break (3), and a collet (4), wherein the plug connector (1) is designed with a mating face (11) and a cable connection face (12), wherein the base body (2) has a recess (7) on the cable connection face (12) in which recess the cable break (3) is accommodated, wherein the cable break (3) is formed of at least one guide element (31) and one clamping element (32), wherein the clamping element (32) connects to the guide element (31) counter to the plug direction, wherein the guide element (31) has at least one wire channel (311) axially directed in the plug direction, wherein the collet (4) forms the cable connection face (12) of the plug connector (1) and surrounds the clamping element (32) and at least sections of the recess (7), wherein the recess (7) is provided with an outer thread onto which the collet (4) can be screwed using a corresponding inner thread, a sealing element (33) being arranged between the guide element (31) and the collet (32).

Description

CONNECTOR WITH SINGLE ADAPTER SEAL WITH PULL RELIEF

description

The invention relates to a plug connector with single wire seal according to the preamble of independent claim 1.

Such connectors are needed to reversibly disconnect and reconnect an electrical cable. In this case, a connector is attached to the cable, which can be electrically and mechanically connected to a mating connector to another cable.

In such connectors, it is common to electrically contact the electrical conductors via insulation displacement terminals. One way to easily contact electrical conductors via insulation displacement terminals is known for example from DE 10 201 1 000 460 A1.

DE 198 36 631 A1 shows an insulating body of a connector which is formed from a connection part and a contacting part. Within the connection part, individual conductors of a multi-core cable can be inserted, wherein the individual conductors run s-shaped within the connection part. The contacting part is with

Cutting terminals equipped that contact the individual conductors electrically when joining connector and contacting.

Also from DE 10 2012 103 708 B3 a connector with an insulating body is known, which is insertable into a housing of a connector, which is formed from a connection part and a contacting part, wherein the contacting part comprises contacting means and the connection part comprises recesses, in which individual Conductor of a multicore cable, whereby the connection part and the contacting part are plugged together, whereby the individual conductors of the multi-core cable with the individual contacting means are electrically contacted, wherein the connection part has means which align the individual conductors along the recesses of the connection part at least in a range of different degrees in the radial direction ,

The publication DE 20 2012 101 449 U1 discloses an insertion aid for an electrical connection device with a strain relief and an insertion sleeve. The introducer sheath and the strain relief are arranged concentrically about an axis, wherein the introducer sheath is made in one piece.

In EP 2 493 040 A1 a cable gland with a central base body is described, which has a threaded shaft and at the opposite end a toothed ring element. The toothed ring element is formed by flexible axial teeth and has a thread on the base of the teeth of the central base body. A gasket disposed inside the central body has a thicker portion and an annular portion. The thicker portion is located substantially in the inner part of the toothed ring member and is sealingly positioned between the central body and the cable. The annular portion of the seal is sealingly disposed on the stem between the body and the object surface.

DE 298 01 757 U1 shows a device for the sealed introduction of Kabein in an electrical connector, consisting of a nipple with one-sided threaded connector and at the opposite end with an insertable into a housing or Wandungsdurchbruch and fastened end part. In the nip! is a contact carrier formed with insulation displacement contacts and a Spieißring used by means of which the insulated wires of a supplied Kabeis in the Contacts are inserted. Furthermore, a sealing insert can be inserted into the nipple, which acts on the splicing ring and a pressure screw can be screwed onto the nipple. Middle of the pressure screw, the sealing insert against the Spieißring can be pressed and the pressure screw presses the sealing insert sealing and zugentlastend against a performed cable. In addition, the sealing insert with the Spieißring is releasable, but connected tensile strength.

US 2012/0178290 A1 relates to a watertight solar power cable connector which comprises a first connecting element, a tensioning element, a watertight element and a second connecting element. The first connection member has two open ends and a tapered inner periphery. The clamping member is received in the first connection member and has a ring from which a plurality of elastic pieces extend. The waterproof element is inserted into the first connecting element and is clamped by the resilient parts of the clamping element. The ring of Kiemmelements is adapted to the engagement portion of the waterproof element. The second connection element is connected to the first connection element. The second connection member has a contact surface adapted to the engagement portion of the waterproof member to seal the connection between the inner circumference of the first connection member and the waterproof member from environmental influences and thus prevent damage to the cable.

A disadvantage of all known from the prior art connectors that they are provided only for the reception of round, o- approximately circular cables with a smooth cable sheath. The seal in the connector is usually realized with the strain relief for the cable in a clamping ring. In order for both the strain relief and the sealing of the cable, so the seal of the interior of the connector to the environment work, must be used cables that have the same characteristics. The cables must be approximately round and must have a relatively smooth surface on the cable sheath.

task

The object of the invention is to vorzugstellen a connector that realizes a strain relief for connected cables, even if the cables have no smooth and round contour. In addition to the strain relief and a seal of the interior of the cable is to be ensured against the environment, so that the internal components of the connector are protected from penetrating particles, and moisture.

The object is solved by the characterizing features of independent claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

In the invention, it is a connector which is formed from a base body, a clamping sleeve and a cable insert. The connector forms on its front side in the insertion direction side of a plug, which is provided for contacting with a mating connector. On the rear side in the plug-in direction, the connector forms a cable connection side.

In the main body of the connector at least two, preferably four, electrical contact elements are provided. The electrical contact elements are either directly pressed in the body, or in this shed, provided that the base body consists of an insulating material. Here are basic plastic body advantageous.

However, an embodiment is conceivable in which the base body consists of metal. In order to receive the contact elements here, an insulating body is provided in the base body. This in turn is made of an electrically non-conductive material, e.g. Plastic, absorbs the contact elements and is connected to the body.

The contact elements received in the main body form the electrical connection between a connected cable and a mating connector. For this purpose, the contact elements on the plug-in side form socket or pin contacts. These can contact contacts of the mating connector.

On its second side, the contact element protrude into a receptacle, which is located on the cable connection side. In the recording, the contact elements form insulation displacement contacts. The insulation displacement contacts are provided for the connection of individual strands, or cores of a connected electrical cable.

On the outside of the receptacle, a thread is provided which can be screwed into a correlating thread in the interior of the clamping sleeve. By screwing the clamping sleeve on the receptacle, and thus on the cable connection side of the connector, this is mounted.

Inside the receptacle, where the insulation displacement contacts of the contact elements are arranged, the cable insert of the connector is provided. This fulfills several functions.

On the one hand, the cable insert comprises a guide element. The guide element is used to guide individual wires of a connected nen cable provided. For this purpose, the guide element has two types of channels.

Per each wire of the connected cable, a conductor channel is provided in which the wire is inserted. The conductor channel is substantially axially aligned, and guides the wire inside in an S-shaped path through the guide member.

In addition, an insulation displacement channel is provided for each conductor channel. These are also arranged substantially axially in the guide element, so that each of the cutting terminal forming a portion of a contact element is received in this.

The conductor and insulation displacement channels intersect each other in the region of the S-shaped conductor channel which is transverse to the direction of insertion. So a contacting of the wire by means of the cutting clamp is possible. Through the S-shaped conductor channel, the wire is led into the insulation displacement terminal and can be contacted by this insulation penetrating.

In addition to the guide element, the cable insert consists of a clamping element, which is provided for the mechanical fixing of a connected cable. For this purpose, the clamping element has a plurality of flexible clamping arms which protrude against the insertion direction into the clamping sleeve.

By screwing the clamping sleeve on the body, the clamping arms of the clamping element are compressed radially inwardly. A guided through the clamping element cable is jammed between the clamp arms and thus mechanically fixed to the connector.

Due to the design of the clamping element with several, individually movable clamping arms, a fixation of cables with non-round cross- cut possible. In contrast to known solutions with a round seal which applies force uniformly over the entire circumference of the cable, the clamping arms act individually on a cable. The shape of the cable is irrelevant. Even cables that do not have the same outer diameter at every point can be fixed mechanically.

The individual clamping arms of the clamping element are arranged on a base. The base is expediently designed for the cable gland around, the clamping arms are arranged in a circle.

The base also serves as a stop for an electrical cable to be connected. Only the individual wires of the cable should be routed through the base. For this purpose, bores are provided in the base area through which one core of the cable can be inserted in each case.

Suitably, the holes are each assigned to a conductor channel of the guide element, wherein in each case a bore and a conductor channel are aligned. Guiding a vein through the base and the guide element is thus made possible.

According to the invention, the cable insert, in addition to the guide element arranged in the plug-in direction and the clamping element arranged opposite the plug-in direction, further comprises a sealing element. The sealing element is arranged between the guide element and clamping element.

The shape of the sealing element is essentially a circle that corresponds to the circumference of the receptacle of the main body and the base of the clamping element. As a result, the sealing element can be pressed between the clamping element and the receptacle and thus prevent the penetration of environmental influences into the connector. In the areas of the holes in the base of the clamping element, as well as the conductor channels, holes are also provided in the sealing element. However, the holes in the sealing element are dimensioned smaller than the holes of the base and the conductor channels. This ensures that a wire of a cable to be connected can be easily guided through the hole in the base of the clamping element, as well as through the conductor channels in the guide element.

The sealing element should be located at the holes tightly around the wires of the cable to be connected to prevent the ingress of environmental influences.

Due to the inventive design of the sealing element and the clamping of this between the clamping element and the recording object of the invention for sealing the connector is achieved.

embodiment

An embodiment of the invention is illustrated in the drawings and will be explained in more detail below. Show it:

Fig. 1 is a perspective view of a connector with a connected cable;

Fig. 2 is an exploded perspective view of a connector; and

Fig. 3 is a sectional view of a connector.

The figures contain partially simplified, schematic representations. In part, identical reference numerals are used for the same but possibly not identical elements. Different views of the same elements could be scaled differently. 1 shows a perspective view of a connector 1 with attached cable 10. The cable 10 protrudes into the cable connection side 12 of the connector. 1 Opposite the cable connection side 12, the connector 1 has a plug-in side 1 1, which is provided for contacting with a mating connector.

The mating side 1 1 is surrounded by a thread 5, which is provided for mechanical fixation of the connector 1 with a mating thread on the mating connector. Suitably, the thread 5 is rotatably provided on a base body 2 of the connector 1.

The main body 2 forms the shape of the connector 1 and is provided for receiving contact elements. The contact elements form at the mating side 1 1 socket or pin contacts for contacting a mating connector.

Cable connection side surrounds a clamping sleeve 4, the base body 2 of the connector. 1 The clamping sleeve 4 is provided for mechanically fixing the cable 10, and for sealing the interior of the connector 1.

The inner elements of the connector 1 can be seen in the figure 2. FIG. 2 shows an exploded perspective view of the connector 1. The main body 2 is surrounded on the mating side 1 1 of the rotatably mounted thread 5. In contrast, the main body 2 forms a receptacle 7 on the cable connection side 12.

The receptacle 7 is designed as a sleeve which is open at the rear, the outside of the receptacle 7 being in the form of an external thread-not illustrated here. The thread of the receptacle 7 serves to screw on the clamping sleeve 4, which on its inside a corresponding inner thread has.

The clamping sleeve 4 has on the cable connection side 12 via a circular opening through which a cable 10 to be connected can be inserted. The inner, cable connection-side region of the clamping sleeve 4 is configured conically tapering, as also seen in Figure 3.

The conically tapering region of the clamping sleeve 4 serves for the mechanical fixing of a cable 10. For this purpose, a clamping element 32 is pressed onto the base body 2 when the clamping sleeve 4 is screwed onto the conical region. Due to the cone-shaped configuration, the clamping element 32 is pressed radially inward, thus generating a force on an inserted cable.

For this purpose, the clamping element 32 clamping arms are formed in this embodiment. Through the conical region of the clamping sleeve 4, the clamping arms are pressed onto an inserted cable 10 and fix this in the connector first

The clamping arms are arranged in a circle on a base of the clamping element 32 such that a cable 10 can be arranged in the middle between the clamping arms. In the base of the clamping element 32 holes are still provided.

The holes in the clamping element 32 are aligned axially in the insertion direction and each provided for carrying a wire of a cable 10 to be connected.

In the insertion direction, the clamping element 32, a sealing element 33 is integrally formed. Advantageously, clamping element 32 and sealing element 33 are produced in one piece as a 2-component injection-molded element. The sealing element 33 is provided for sealing the interior of the connector 1 from the environment. For this purpose, the circular sealing element 33 seals between the clamping element 32 and the sleeve-shaped collar of the receptacle 7. By screwing the clamping sleeve 4, the clamping element 32 is pressed onto the sealing element 32, which in turn is pressed onto the cable connection side edge of the receptacle 7. A seal of the connector 1 is guaranteed.

To carry out the wires of a cable 10 to be connected to the sealing element 33 are also provided as the clamping element 32 in the insertion direction axially aligned bores. These have the same positions as the holes in the clamping element 32nd

In contrast to the holes in the clamping element 32, the holes in the sealing element 33, however, are smaller in size. The dimensioning of the holes depends on the conductor cross-section of the cable to be connected. The holes of the clamping element 32 should be slightly larger than the wire thickness, the bore of the sealing element 33 slightly lower.

Such a dimensioning of the holes ensures that the wires can be easily guided by the clamping element 32, and at the same time the sealing element 33 seals the wires.

In the insertion direction in front of the sealing element 32, a guide element 31 is provided, which is received in the receptacle 7 of the base body 2. The guide member 31 is provided for receiving and guiding the individual wires of the cable 10.

In this particular embodiment, the guide element 31 is designed for receiving and S-shaped guidance of the individual wires. The S-shaped guide of the wires is needed to contact them with insulation displacement contacts in the receptacle 7. The embodiment of such Insulation displacement contacts is already widely known from the prior art and will not be explained further here.

The guide element 31, the clamping element 32 and the sealing element 33 together form the cable insert 3, which is accommodated in the interior of the connector 1. The cable insert 3 is screwed by the clamping sleeve 4 on the cable connection side 12 of the connector. 2

The connector 1 with connected cable 10 of Figure 1 is shown in Figure 2 again in a sectional view. The representation is reduced to the cable connection side 12 of the connector.

Visible is the conical tapered structure of the clamping sleeve 4 in the rear direction plug-in direction. This ensures a clamping of the cable 10 by the clamping arms of the clamping element 32. The clamping sleeve 4 is screwed by means of the internal thread on the external thread of the receptacle 7.

The clamping sleeve 4 presses the cable insert 3 in the receptacle 7. By the axially directed in the insertion direction pressure on the clamping element 32, the sealing element 33 is pressed between the clamping element 32 and the receptacle 7 and seals the connector 1 against environmental influences.

The wires of the cable 10 are guided through the holes of the clamping element 32, and holes of the sealing element 33 in the conductor channels 31 1 of the guide member 31. By dimensioning the holes of the sealing element 33, which are smaller than the diameter of the wires, a seal of the wires is granted by the sealing element 33. LIST OF REFERENCE NUMBERS

Connectors

mating side

Cable connection side

body

Cords

guide element

conductor channel

clamping element

sealing element

drilling

collet

admission

electric wire

Claims

Expectations

Connector (1) comprising a base body (2), a cable insert (3) and a clamping sleeve (4),

wherein the connector (1) forms a plug-in side (1 1) and a cable connection side (12),

where the basic body

(2) has a receptacle (7) on the cable connection side (12) in which the cable insert (3) is accommodated,

wherein the cable insert (3) is formed at least from a guide element (31) and a clamping element (32),

wherein the clamping element (32) is arranged against the insertion direction behind the guide element (31),

wherein the guide element (31) has at least two conductor channels (31 1) which are axially aligned in the plugging direction,

wherein the clamping sleeve (4) forms the cable connection side (12) of the plug connector (1) and surrounds the clamping element (32) and, at least in some areas, the receptacle (7),

wherein the receptacle (7) is provided with an external thread onto which the clamping sleeve (4) can be screwed with a corresponding internal thread,

characterized in that

A sealing element (33) is arranged in the insertion direction between the guide element (31) and the clamping element (32).

Connector (1) according to claim 1

characterized in that

At least two bores (331) axially aligned in the insertion direction are provided in the sealing element (33), the bores (331) are assigned to the at least two conductor channels (331) of the guide element (31) and are arranged in alignment with them.

3. Connector (1) according to one of the preceding claims

characterized in that

the sealing element (33) is round and is approximately the size of the receptacle (7).

4. Connector (1) according to claim 3

characterized in that

the sealing element (33) is axially clamped between the clamping element (32) and the receptacle (7).

5. Connector (1) according to one of the preceding claims

characterized in that

the sealing element (33) is manufactured together with the clamping element (32) as a 2-component injection molded part.

6. Connector (1) according to one of the preceding claims

characterized in that

the clamping element (32) is formed from a circular base surface arranged perpendicular to the plug-in direction, the base surface having at least two bores running in the plug-in direction, and the base surface being formed with a plurality of flexible clamping arms projecting into the clamping sleeve (4) in the opposite direction to the plug-in direction are.

7. Connector (1) according to one of claims 1 to 6, characterized in that

the clamping element (32) is an annular element which consists of consists of a flexible material and, by screwing on the clamping sleeve (4), exerts a radially inward force on a cable that is passed through.

Connector (1) according to one of the preceding claims

characterized in that

At least two electrical contact elements are accommodated in the base body (2), which form a pin or socket contact projecting into the plug-in side (11) at a first end and form an insulation displacement contact projecting into the receptacle (7) at a second end,

wherein the guide element (31) has at least two

has insulation displacement channels that are essentially axially aligned in the plugging direction,

wherein the at least two conductor channels (31 1) are S-shaped and intersect the at least two insulation displacement channels with an area lying approximately transversely to the plugging direction.

Connector (1) according to one of claims 1 to 7, characterized in that

the at least two conductor channels (31 1) of the guide element (31) are provided for receiving contact elements, the contact elements forming a pin or socket contact projecting into the plug-in side (1 1) at a first end, and a connection for wires at the second end of a cable to be connected.