SU1647710A1 - Fork-shaped electric contact cutting through wire insulation - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase reliability. The device comprises a body 1 of sheet metal of constant thickness. An U-shaped bar 2 is made in the housing to connect the insulated wires 3 When inserting the wire 3 into the groove 2, the end surfaces 7 of the walls cut through the insulation and cut into the core, since the width of the groove 2 is smaller than the core diameter. Not less than one wall 6, the thickness of the inner face 5 is less than the thickness of the sheet material of the housing 1. And the section for reducing the thickness is not less than the depth of insertion of the wire 3 into the groove 2. At the same time, at least one wall 6 has a thickness of the inner face 5 so that the smallest thickness coincides with the end surface 7 and increases towards the base of the groove. The resulting contact zone consists of three sections with different cross-sectional shapes, which ensures wedging of the wall 6 into the core 8 and the formation of reliable contact in several places to stabilize the transient resistance. 3 il. 7

Description

F08. 2

The invention relates to electrical engineering, in particular to electrical contacts providing connection to an insulated wire without first removing the insulation.

The aim of the invention is to increase the reliability of the connection

Fig, 1 shows a forked electrical contact; in Fig.2 the interaction of the wire with the wall of the groove; FIG. 3 shows a part of the conductor of a wire with contact areas.

A fork-shaped electrical contact (HEC) comprises a housing 1 made of sheet material of constant thickness. The housing 1 has a V-shaped groove 2 for connecting the wire 3 with the insulation 4.

A groove 2 is formed between the inner edges 5 of the walls 6. The wire 3 is connected to the EEP by inserting it into the groove 2. The end surfaces 7 of the walls b cut the insulation 4 and cut the wires 3 into the conductor 8, since the width of the groove 2 is smaller than the diameter of the conductor 8 and the latter is made of a softer material than case 1. Not less than one wall 6, the thickness of the inner face 5 is less than the thickness of the sheet material of which case 1 is made, i.e. the wall 6 on the side of the groove 2 has a thickness reduction, and along the length of the wall 6, the thickness reduction section is not less than the depth of insertion of the wire 3 into the groove 2. Not less than one wall b to a depth not less than the depth of insertion of the wire 3, the thickness of the inner the face 5 is made variable, while the smallest thickness of the inner face 5 coincides with the end surface 7 of the wall 6, and the thickness of the inner face 5 of the wall 6 increases from the end surface 7 of the wall b to the base of the groove 2. When installing the wire 3 into the groove 2 1 t hull Rtsy walls 6 7 Slot insulation wires 3 and 4 cut into the conductor wire 8 3. Already in the initial stage of the process of reacting the wires 3 and groove 2 between the walls 6 and 8 is formed residential contact zone 9. The latter consists of three sections. The middle section 10 is formed between the inner edge 5 of the wall b and

wire 8 wires 3. It is located in a plane parallel to the axis of the wire 8, and has the form of a trapezoid. Two multiples of the section 11 of the contact zone 9 are formed between the conductor 8 of the wire 3 and the side surfaces 12 of the wall 6. They are located on the sides of the middle section 10, perpendicular to the axis of the conductor 8 of the wire 3, and have the shape of a circle segment. In the process of further advancement of the wire 3 into the groove 2, the material of the core 8 of the wire 3 side surfaces 12 of the wall b is shifted in the direction of the axis of the core 8 of the wire 3. The reason for this is the varying thickness of the inner face 5 of the wall 6 and the location of its smallest value on the front surface 7 .

As a result of the described wedging of the wall 6 into the core 8, a reliable electrical contact is formed not only in

the middle section 10, but also between the core 8 and the side surfaces 12 of the wall b in the extreme sections 11 of the contact zone 9. This leads to a decrease in the total value of the transient resistance, stabilizing it, since the transient resistance becomes independent of random variations in the thickness of the inner face 5 walls b, i.e. increases the reliability of contact

Claims (1)

Claims Fork-shaped electrical contact, cutting through the wire insulation, comprising a housing made of a constant thickness material with a V-groove for connecting the wire, equipped with sections for loro, taking the insulation of the wire formed by the end surfaces of the groove walls, and the thickness of the inner faces the walls of the groove in the area of interaction with the wire, to the depth of its insertion, are made smaller than the thickness of the case, which is characterized by the fact that, in order to increase reliability, the thickness of the inner edge, not less than one wall of the groove, in the area of interaction with the wire, to the depth of its insertion, made variable, with the smallest thickness coinciding with the end surface of the walls groove, and the largest - with the base. / 1 AT 11 10 G4. L./ t - Sh one