DE202012101449U1 - Insertion aid and electrical connection device - Google Patents

Abstract

An insertion aid (1) for an electrical connection device (4), with a strain relief (15) and an insertion sleeve (14), which are arranged concentrically about an axis (2), wherein the insertion aid (1) is made in one piece.

Description

The present invention relates to an insertion aid for an electrical connection device, with a strain relief and an insertion sleeve, which are arranged concentrically about an axis. The present invention further relates to the electrical connection device with the insertion aid.

For electrical connection devices for connecting electrical conductors to a plug or to electrical assemblies, in particular to housings of electrical assemblies, high demands are made in terms of ease of handling. Furthermore, the requirements in terms of tensile strength of the connected electrical conductors and the protection of the electrical contacts against dust and moisture, especially for use in industrial environments, very high.

The object of the invention is to provide an electrical connection device which is provided for connecting an electrical conductor to an electrical assembly, in particular to a housing of the electrical assembly, and which is simple and inexpensive to manufacture and easy to handle, as well as a secure contact guaranteed under tensile load. In addition, an object of the invention is that the connection device ensures good dust and moisture protection.

The object is achieved with an insertion aid for an electrical connection device comprising a strain relief and an insertion sleeve, which are arranged concentrically about an axis, and which is manufactured in one piece. The insertion aid therefore at the same time allows a very easy insertion of an electrical conductor into an electrical connection device, in particular a very finely stranded electrical stranded conductor, as well as the function of a strain relief for the electrical conductor. Due to the one-piece production of the insertion aid, the number of components for an electrical connection device with the insertion is reduced, so that the storage and manufacturing are cost-effective. In addition, the assembly of the electrical connection device is thereby quickly and easily possible.

In a preferred embodiment, the insertion sleeve is funnel-shaped, so that its diameter is at least slightly reduced in an insertion direction of the electrical conductor. The electrical conductor is thereby guided in a defined position.

It is preferred that the electrical conductor comprises a, in particular electrically insulating, sheath and an electrically conductive core. Preferably, it is designed as a stranded conductor, so that the wire is formed from a plurality of strands. However, the insertion aid is also suitable for full conductors in which the wire is formed from a single wire.

In a preferred embodiment, the strain relief comprises at least one clamping means and at least one retaining tongue, which are connected to one another at the end of the strain relief facing away from the insertion via a front ring. In this case, the end ring is provided for connecting the clamping means with the retaining tongue in order to keep the number of components small.

The clamping means in a preferred embodiment has a curved open end. It is therefore designed like a clamping claw. Preferably, the clamping means extends in a ground state in an axial direction of the axis, so that the electrical conductor in the ground state in the axial direction is displaceable. Preferably, the clamping means is elastic and / or plastic, so that it is deformable, in particular flexible, is. Particularly preferably, it is deformable from the ground state into a clamping state in which it is bent against a radial direction and towards the axis. Thereby, the bent open end of the clamping means in the clamping state in the sheath of the electrical conductor can be pressed or pressed, so that the electrical conductor is frictionally held by the clamping means.

It is preferred that the curved open end is disposed at an end of the strain relief facing the introducer sheath. In this arrangement, it is provided for cooperation with a housing part of the electrical connection device so that the electrical connection device for an operator is easy to handle.

The retaining tongue preferably has a connecting web on the end facing the insertion sleeve. It connects the insertion sleeve with the strain relief. According to the invention, it is formed integrally with the insertion sleeve. In a preferred embodiment, the connecting web is elastic and / or plastic. In this embodiment, the retaining tongue is deformed from the ground state in which it extends in the axial direction, against the radial direction and to the axis, so that it is pressed in the clamping state in the electrical conductor. As a result, it acts in this embodiment not only as a holding tongue, but at the same time as a clamping means.

In addition, it is preferred that the strain relief comprises a tongue which is arranged on the end ring and between the clamping claw and / or the retaining tongue. The tongue extends in the axial direction. It has an open end and is preferably formed shorter than the clamping means. As a result, it is not bent in a clamping state to the axis.

Particularly preferably, the strain relief comprises a plurality of clamping claws, retaining tongues and / or tongues which are arranged concentrically about the axis and on the end ring. The plurality of clamping claws, tongues and / or holding tongues are particularly preferably arranged at equidistant intervals from one another on the end ring in order to distribute the clamping and holding forces uniformly in a tangential direction.

The object is further achieved with an electrical connection device with such an insertion aid. The electrical connection device comprises as housing parts preferably a spring housing and a conductor housing, which are reversibly connected to each other, in particular screwed, are. Particularly preferably, the insertion aid is arranged in the conductor housing. Most preferably, it is arranged in an insertion direction of an electrical conductor in the electrical connection device before the strain relief. Therefore, the insertion aid not only allows insertion of an electrical conductor, in particular a stranded conductor, in the electrical connection device, but also ensures a strain relief of the connected electrical conductor in a tensile load against the insertion. As a result, the electrical conductor is securely contacted in the electrical connection device.

The conductor housing preferably has an inner surface which tapers against the insertion direction along a ramp. As a result, the clamping means and / or the holding means when connecting the spring housing with the conductor housing in abutment against the ramp and bends from the basic position in which the electrical conductor is inserted into the insertion, in a clamping position in which the clamping means and / or Holding means are adjusted so that they are pressed into the sheath of the electrical conductor. As a result, the electrical conductor is held under tensile load against the insertion direction non-positively and / or positively by the clamping means and / or holding means. At least the clamping means preferably have a clamping edge on their side facing the electrical conductor. The clamping edge prevents slippage of the electrical conductor in tensile load against the insertion direction.

In the spring housing a contact means for contacting the electrical conductor is further preferably provided. The contact means is provided for connecting the electrical conductor to an electrical assembly. An electrical assembly according to the invention is for example an electrical conductor or a single electrical component or a circuit of a plurality of electrical components. It is protected in a preferred embodiment by a housing. Particularly preferably, the electrical connection device can be connected to the housing.

In a preferred embodiment, the contact means is a spring-loaded terminal. In principle, however, other contact means, for example a screw terminal or an insulation displacement terminal, are also suitable for connecting the electrical conductor.

In the electrical connection device, the clamping means assumes a tensile load acting on the electrical conductor, that is, a load of the conductor against the insertion direction, at least partially. As a result, either the holding force of the contact means can be provided comparatively smaller. Or the electrical conductor is securely held in the electrical connection device even with high tensile load, or the electrical contact to the electrical contact part is guaranteed safe.

In a preferred embodiment, the electrical connection device further comprises a centering sleeve. The centering sleeve is preferably funnel-shaped and preferably arranged concentrically around the electrical conductor in the mounted state. On the one hand, it causes strands of the electrical conductor not to hang on an edge or a stop and, on the other hand, that the strands are guided into the contact part.

It is further preferred to provide a seal in the conductor housing. The seal concentrically surrounds the electrical conductor in the mounted state. It prevents the entry of dust and moisture into the conductor housing and the spring housing when installed, so that the contact agent is protected against dust and moisture. It is particularly preferred that the clamping means, holding means and / or tongues at least partially rest against the seal. The thus existing positive and / or frictional connection between the seal and the clamping means, holding means and / or tongues causes an additional relief in a load of the electrical conductor to train against the insertion direction.

The invention will be explained in more detail below with reference to the drawings with reference to embodiments, wherein further advantages of the invention will become apparent.

It shows:

1 a perspective view of an insertion aid according to the invention, and

2 a sectional view of a section of an electrical connection device, in (a) without inserted electrical conductor and in (b) with inserted electrical conductor.

The insertion aid 1 of the 1 is for an electrical connection device 4 provided and includes a strain relief 15 and an introducer sheath 14 concentric about an axis 2 are arranged. It has a through hole 16 on, through which an electrical conductor 3 in an insertion direction 21 moving in an axial direction 21 along the axis 2 extends into the electrical connection device 4 is insertable (s. 2 ).

The insertion aid 1 is made in one piece. Preferably, it is made as a molded part of an electrically insulating material, preferably of a plastic. It is particularly preferably cast.

The strain relief 15 includes on one of the introducer sheath 14 opposite end 151 a front ring 10 at which several clamping means 12 are arranged. The clamping means 12 are arranged at equidistant distances from each other, so that a clamping force with which they are on the electrical conductor 3 act evenly in a circumferential direction 23 distributed.

Between the clamps 12 are tongues 11 as well as retaining tongues 13 provided, which are also equidistant from each other here. Both the clamping means 12 as well as the tongues 11 and holding tongues 13 extend from the front ring 10 starting, connecting them together, against the insertion direction 21 ,

At one of the insertion sleeve 14 facing the end 152 the strain relief 15 have the tongues 11 and clamping means 12 an open ending. In this case, the clamping means 12 an inward, namely against a radial direction 22 the axis 2 , curved end 121 on, on each of which a clamping edge 122 is arranged. The clamping means 12 are therefore designed here as clamping claws. To a bending of the clamping means 12 against a radial direction 22 and to the axis 2 not to obstruct, is in the embodiment shown here, the introducer 1 for each clamping means a recess 141 intended.

The tongues 11 are for positively holding the insertion aid 1 in a conductor housing 42 the electrical connection device 4 (S. 2 ) and shorter than the clamping means 12 and holding tongues 13 educated.

The retaining tongues 13 each have at their the insertion 14 facing the end 152 a connecting bridge 131 on, with which she uses the introducer sheath 14 are integrally connected.

2 shows the insertion aid 1 in an electrical connection device 4 , The electrical connection device 4 includes a spring housing 41 in which a contact agent 7 for contacting an electrical assembly (not shown), and the conductor housing 42 ,

On the spring housing 41 is here as a lanyard 411 provided an external thread, wherein the conductor housing 42 as a counter-bonding agent 421 an internal thread is provided so that the conductor housing 42 here with the spring housing 41 is screwed. But there are also other, easy to handle connection techniques for reversibly connecting the spring housing 41 with the conductor housing 42 preferred, for example, jamming or latching by means of snap means (not shown).

In the spring housing 41 is a contact 7 arranged here that is designed as a spring clamp, which is a spring cage 72 and a clamping spring 71 having. The contact agent 7 is for connecting the electrical conductor 3 provided with an electrical assembly (not shown). The clamping spring 71 is preferably formed of a material with good spring properties. Their spring force is the contact force with which the electrical conductor 3 in the electrical connection device 4 is held, adjustable. However, the invention is not limited to such a contact agent 7 limited, but is also suitable for other contact means 7 For example, for a screw or IDC terminal.

In the conductor housing 42 is the introductory aid 1 arranged. Here is the introducer 14 in insertion direction 21 of the electrical conductor 3 seen before the strain relief 15 arranged. The electrical conductor 3 is therefore through the insertion sleeve 14 and then through the strain relief 15 in the spring housing 41 and to the contact agent 7 insertable. The introducer sheath 14 facilitates the insertion of an electrical conductor 3 , in particular a stranded conductor, in the electrical connection device 4 ,

To the vein 32 of the electrical conductor 3 controlled to the contact agent 7 to lead, here is also a centering sleeve 6 provided at her the contact means 7 facing side 60 funnel-shaped, so that they are in the insertion direction 21 of the electrical conductor 3 rejuvenated. In a training of the vein 32 of the electrical conductor 3 As stranded conductors, the strands are bundled by the centering sleeve.

As protection against the ingress of dust and moisture is in the conductor housing 42 also between the centering sleeve 6 and the strain relief 15 a seal 5 intended. When connecting the spring housing 41 with the conductor housing 42 becomes the seal 5 at least partially between the strain relief 15 and the spring housing 41 jammed. As a result, in an assembled state of the electrical connection device 4 in which the spring housing 41 with the conductor housing 42 reversibly connected, the penetration of dust and moisture to the contact means 7 prevented.

In addition, the seal lies 5 at least partially on the clamping means 12 Holding means 13 and / or tongues 11 so that they are at a load of the electrical conductor 3 against the insertion direction 21 acting tensile forces at least partially positively and / or positively receives.

The conductor housing 42 has an inner surface 423 on, who oppose the insertion direction 21 along a ramp 422 rejuvenated. When connecting the spring housing 41 with the conductor housing 42 get the clamping means 12 the strain relief 15 with her bent ends 121 each in contact with the ramp 422 so that they are against the radial direction 22 from a basic position to the axis 2 toward a clamping position (not shown). With inserted electrical conductor 3 get the bent ends 121 the clamping means 12 while in contact with the casing 31 of the electrical conductor 3 and are pressed into the clamping position in this. The clamping means 12 have a clamping edge 122 on, at which the sheathing 31 of the electrical conductor 3 at a tensile load on the electrical conductor 3 against the insertion direction 21 supported. This will take the clamping means 12 the tensile load at least partially non-positively.

Depending on the design of the holding means 13 or the connecting web 134 become the holding means 13 thereby also bent from the basic position in the clamping position and absorb the forces resulting from tensile load at least partially.

In addition, the clamping means are 12 , Holding means 13 and / or tongues 11 in the mounted state at least partially on the seal 5 so that they receive a part of the tensile load form fit.

LIST OF REFERENCE NUMBERS

1

insertion

10

end ring

11

tongue

111

Open end of the tongues

12

Clamping means, clamping claw

121

Bent end of the clamp claw

122

clamping edge

13

holding tongue

134

connecting web

14

introducer

141

recess

15

Strain relief

151

The insertion sleeve facing away from the strain relief

152

The insertion sleeve facing the end of the strain relief

16

Through Hole

2

axis

21

Conductor insertion direction

3

Electrical conductor

31

Electrically insulating sheath

32

Core, strand, full conductor

4

Electrical connection device

41

spring housing

411

Connecting means, external thread

42

conductor housing

421

Counter-connection means, internal thread

422

ramp

423

Inner surface of the conductor housing

5

poetry

6

centering

60

The electrical contact means facing the end of the centering sleeve

7

Electrical contact means, spring cage

71

contact spring

G

basic position

Claims (14)

Insertion aid ( 1 ) for an electrical connection device ( 4 ), with a strain relief ( 15 ) and an introducer sheath ( 14 ) concentric about an axis ( 2 ), wherein the insertion aid ( 1 ) is made in one piece. Insertion aid ( 1 ) according to claim 1, characterized in that the strain relief ( 15 ) at least one clamping means ( 12 ) and at least one retaining tongue ( 13 ) attached to one of the introducer sheath ( 14 ) facing away from the end ( 151 ) the strain relief ( 15 ) via a front ring ( 10 ) are interconnected. Insertion aid ( 1 ) according to one of the preceding claims, characterized in that the clamping means ( 12 ) as a clamping claw with a curved open end ( 121 ) is formed, on which a clamping edge ( 122 ) is provided. Insertion aid ( 1 ) according to one of the preceding claims, characterized in that the curved open end ( 121 ) on one of the introducer sheath ( 14 ) facing end ( 152 ) the strain relief ( 15 ) is arranged. Insertion aid ( 1 ) according to one of the preceding claims, characterized in that on the insertion sleeve ( 14 ) facing end ( 152 ) of the Strain relief ( 15 ) a connecting bridge ( 134 ) is provided, the retaining tongue ( 13 ) with the insertion sleeve ( 14 ) connects. Insertion aid ( 1 ) according to one of the preceding claims, characterized in that the strain relief ( 15 ) several clamping claws ( 12 ) and / or a plurality of retaining tongues ( 13 ) concentric about the axis ( 2 ) and on the front ring ( 10 ) are arranged. Insertion aid ( 1 ) according to one of the preceding claims, characterized in that the strain relief ( 15 ) more tongues ( 11 ), which on the end ring ( 10 ) and between the clamping claws ( 12 ) and / or retaining tongues ( 13 ) are arranged. Electrical connection device ( 4 ) with an insertion aid ( 1 ) according to one of the preceding claims. Electrical connection device ( 4 ) according to claim 8, characterized in that it comprises a spring housing ( 41 ) and a conductor housing ( 42 ), which are reversibly connectable, in particular screwed, are. Electrical connection device ( 4 ) according to one of claims 8-9, characterized in that the insertion aid ( 1 ) in the conductor housing ( 42 ) is arranged. Electrical connection device ( 4 ) according to one of claims 8-10, characterized in that the insertion sleeve ( 14 ) in an insertion direction ( 21 ) of an electrical conductor ( 3 ) in the electrical connection device ( 4 ) before the strain relief ( 15 ) is arranged. Electrical connection device ( 4 ) according to one of claims 8-11, characterized in that the conductor housing ( 42 ) an inner surface ( 423 ), which oppose the insertion direction ( 21 ) along a ramp ( 422 ) rejuvenated. Electrical connection device ( 4 ) according to one of claims 8-12, characterized in that the clamping means ( 12 ) and / or the holding means ( 13 ) when connecting the spring housing ( 41 ) with the conductor housing ( 42 ) in contact with the ramp ( 422 ) and deforms from a home position (G) to a clamping position. Electrical connection device ( 4 ) according to one of claims 8-13, characterized in that in the spring housing ( 41 ) a contact agent ( 7 ) for contacting the electrical conductor ( 3 ) is provided.

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