RU2519837C1 - Angle bend (case) of electrical connector - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: angle bend (case) of an electrical connector is equipped with a stepped bushing with an element of its fixture to the respective part of the electrical connector body at its one step and at its other step with the outer thread there is a mounting bracket with axial rotation fixed by a nut with the inner thread interacting with the outer thread of the stepped bushing. The mounting bracket is made as a ring with a mounting stud faced towards the side of the cable core output. At the mounting stud of the above mounting bracket there is an installed and fixed a thin-wall mounting bracket for the cable core fixing, it is covered by a thin-wall bushing of the cable core output that has at the mounting space side an open-ended lobe and a groove covering the stud of the mounting bracket, and at the cable core side there is a collar for fixture of the cable shielding or its fragment. The mounting space is limited and protected by a solid thin-wall shell made as a sphere coupled with a cylinder with variable cross-section. By its inner surface the thin-wall shell covers the outer surface of the open-ended lobe of the thin-wall bushing, the retaining nut of the mounting bracket and its circular part to which it is fixed and by its shaped part it covers the thin-wall bushing of the cable core output and the mounting stud of the mounting bracket.

EFFECT: expanding functional capabilities of the angle bend due to introduction of fixing elements for the cable core thus providing improvement in reliability of cable connections and improving efficiency of their production.

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Description

The invention relates to the field of electrical engineering, in particular to electrical connectors designed for switching electrical circuits between devices of rocket and space and aviation equipment, where the question of the need to improve the overall mass characteristics of products is particularly acute.

A technical solution according to RF patent No. 2113041 "Method for plugging a shielded cable into an electrical connector" (1), in accordance with which the formation of a cable termination unit into an electrical connector using the technology of magnetic-pulse processing of materials, is directed at solving this problem. The application of this technical solution greatly facilitates the fulfillment of a number of tasks arising in the manufacture of an onboard cable network (BCS), however, the output of the cable trunk in the direction of the axis of the electrical connector does not solve the problem of rational arrangement of products with a large number of switching devices such as electrical connectors.

To improve the product layout diagrams, electrical connecting devices with corner fittings (covers) are used as switching devices, when using which the onboard cable network (BCS) is more compact, since cable trunks are separated from the switching points more optimally in directions and, therefore, take up less space in products.

In the vast majority of cases where commercially available electrical connectors with angular nozzles are used, the channel for outputting the cable from the electrical connector is located at an angle of 90 ° to the axis of the electrical connector, while the direction of the output of the cable trunk relative to the polarizing elements (keys) of the electrical connectors in the azimuthal plane is characterized by a discrete angle, which provided by

appropriate orienting elements embedded in the design of the corner pipe and connector housing. For example, in 2РМ ГЕО.364.126ТУ type connectors (2), the channels for the cable trunk exit are located in the plane of the axis of the connector at an angle of 90 °, and in the azimuthal plane, the cable trunk exit relative to the polarizing elements of the connector housings has only two opposite directions (discrete angle -180 °).

Another disadvantage of angle pipes manufactured by industry is their large dimensions and weights, which are determined by the manufacturing technology, in particular by casting or machining. The weight of such a corner pipe is about 30% of the weight of the connector. Often, consumers of electrical connectors manufactured by the industry are forced to either completely refuse to use the nozzles that complete them, replacing the nozzles with the so-called “die-casting” using, for example, epoxy casting compounds, or replace them with their own “home-made” nozzles made of polymer materials. At the same time, new problems appear, in particular, the problem of protecting BCS from external influences: electromagnetic fields, static electricity, elevated temperatures, etc.

These circumstances limit the ability of linkers, especially when assembling products with a large number of electrical components, including electrical connectors included in its on-board cable network (BCS).

In the technical solution according to the patent of the Russian Federation 2360340, a method for manufacturing an angular nozzle is proposed, including elements for attaching it to the housing of one of the connector parts and a channel for forming and withdrawing the cable trunk from the mounting space, in which the nozzle is made in the form of two articulated thin-walled semi-tubes with spherical surfaces, which are installed with the possibility of rotation relative to each other around their common center of the spheres, which ensures the withdrawal of the cable trunk from the installation space in any board in the azimuthal plane relative to the polarizing elements (keys), and electric connectors in the range from 45 ° to 90 ° in the plane of the axis of the connector. This allows you to improve the layout of products and their overall mass characteristics. This technical solution is taken as a prototype.

The disadvantage of the proposed technical solution is the lack of elements of mechanical fastening of the cable trunk until the installation space is filled with casting compound and cured. Such fastening is necessary in order to be able to verify the correctness and quality of installation before filling with a compound, which are usually carried out in a special test unit using test electrical equipment that cannot be placed at the installation production site. Therefore, transportation of the cable to the test site and vice versa is necessary. In the absence of reliable fastening, during such transportation of the cable, deformations of the wires are possible, especially dangerous in the area of their connection with the contacts of the electrical connectors, which can lead to the appearance of latent defects. The use of technological devices to eliminate possible deformation of wires does not exclude the appearance of latent defects. In addition, the installation of such devices complicates the process and lengthens the production of cables, especially those that have a large length and a large number of branches.

The objectives of the proposed technical solution is to increase the functionality of the pipe by introducing cable trunk mounting elements, which, in turn, improves the reliability of cable connections and increases the efficiency of their production.

These goals are achieved by the fact that the nozzle is equipped with a stepped sleeve, on one of the steps of which an element of its fastening to the housing of the corresponding part of the electrical connector is made, and on the other, having an external threaded thread, a mounting bracket mounted with a nut fixed to the inner a threaded thread interacting with an external threaded thread of a stepped sleeve. The mounting bracket is made in the form of a ring equipped with a mounting protrusion directed towards the exit of the cable trunk. A thin-walled mounting bracket for mounting the cable trunk is mounted and fixed on the mounting ledge of the mounting bracket, which is covered by a thin-walled sleeve for the output of the cable trunk, which has an open curved protrusion and a groove on the side of the mounting space that surrounds the protrusion of the mounting bracket, and an annular protrusion of the shielding cable sheath or its fragment. The mounting space is limited and protected by a thin-walled volumetric shell, made in the form of a sphere conjugated to a cylinder of variable section. A thin-walled shell with an inner surface covers the outer surface of the open curved protrusion of the thin-walled sleeve, the nut of the mounting bracket and its annular part to which it is attached, and a curved cutout covers the thin-walled sleeve of the cable trunk outlet and the mounting protrusion of the mounting bracket.

Figure 1, 2, 3 shows three projections of the angular branch pipe of the electrical connector in a position in which the axis of the channel for outputting the cable trunk relative to the main axis of the pipe is 90 °.

Figures 4, 5 show two projections of the corner pipe in a position in which the axis of the channel for outputting the cable trunk relative to the main axis of the pipe is 60 °.

Figure 6 shows an embodiment of mounting the cable in the electric connector using the proposed angular pipe, the axis of the channel for outputting the cable trunk is 90 ° to the main axis of the pipe, which is a continuation of the axis of the electric connector.

The corner connector of the electrical connector consists of a stepped sleeve 1, one of the steps of which 2 faces one of the parts of the electrical connector and has a reciprocal element for their mutual fastening, for example, internal thread 4, and the second step 5, facing the mounting space, is made in the form of a cylinder 6 with an external threaded thread 7. On the outer side of the step 5 of the step sleeve 1, a mounting bracket 8 mounted with a nut 9 with an internal threaded sharp 10, interacting with the external threading 7 of the stepped sleeve 1. The mounting bracket 8 is made in the form of a ring 11, equipped with a mounting protrusion 12 directed towards the exit of the cable trunk 13. A thin-walled mounting bracket 14 is mounted and fixed on the mounting ledge 12 of the mounting bracket 8 the cable trunk 13, which is covered by a thin-walled sleeve 15 of the output of the cable trunk 13. The thin-walled sleeve 15 of the output of the cable trunk 13 from the mounting space has an open curved protrusion 16 and a groove 17 covering the mounting protrusion 12 of the mounting bracket 8. From the output side of the cable trunk, the thin-walled sleeve 15 has an annular protrusion 18 for attaching the outer sheath of the cable or its fragment. The mounting space is limited and protected by a thin-walled surround shell 19, made in the form of a hemisphere 20, paired with a cylinder 21 of variable cross-section. The thin-walled shell 19 with its inner surface covers the outer surface of the open curved protrusion 16 of the thin-walled sleeve 15, the nut 9 of the mounting bracket 8 and its annular part 11, to which it is fastened, for example, by rolling, and the figured cut-out 23 covers the thin-walled sleeve 15 of the output of the cable trunk 13 and mounting tab 12 of the mounting bracket 8.

On the shank 24 of the thin-walled mounting bracket 14, a recess 25 is made to accommodate the elements of the preliminary fastening of the cable trunk 13, for example, a wire brace 35. The mounting bracket 14 is attached to the mounting protrusion 12 of the mounting bracket 8, for example by a screw 26 and a nut 27, which allows, if necessary, to ensure reliable metallization of the cable network by installing under the nut 27 the tip of the branch of the product metallization system. In cases where the cable outlet is made at an angle to the main axis of the nozzle, the mounting protrusion 12 of the mounting bracket 8 is also made at an appropriate angle to the plane of its ring 11, as shown in FIGS. 4, 5.

The step sleeve 1 and the nut 9 of the mounting bracket are made of electrically conductive material with a low specific gravity, for example, from an aluminum pipe by machining, the mounting bracket is made of electrically conductive sheet material, for example, from an aluminum sheet with a thickness of 1.5-2 mm, and a mounting bracket 8 , a thin-walled sleeve 15 and a thin-walled shell 21 are made of aluminum foil with a thickness of 0.3-0.5 mm by stamping, for example electropulse, or by rotational extrusion. All this allows you to make corner pipes with reduced overall weight characteristics.

The installation of the corner pipe in the cable is carried out in the following order:

- on the cable trunk 13 dress alternately thin-walled sleeve 15 and pre-assembled step sleeve 1 mounting bracket 8, its mounting nut 9 and mounting bracket 14;

- electrical installation of the conductors 28 of the cable into the contacts 29 of the electrical connector 30;

- the connector 30 is installed and fixed on the stepped sleeve 1;

- the mounting bracket 8 is installed with the specified direction of the mounting protrusion 12 with the mounting bracket 14 fixed thereon relative to the connector key and secured with a nut 9;

- the cable conductors are molded to ensure that the conductors 28 are laid in the mounting bracket 14;

- the mounting elements of the cable assembly are installed: insulating materials 31 and an insulating sheath 32, an inner shielding sheath 33, filament 34 and wire ties 35, with which the conductors 28 and sheaths 32 and 33 of the cable are insulated and pre-mounted on the mounting bracket 14. The wire ties 35 are sealed with solder ;

- after an electrical check of the correctness and quality of installation, a thin-walled sleeve 15 and a volume thin-walled shell 21 are installed and fixed;

- the mounting space is filled with foam compound 36;

- the outer shielding shell or its fragment 37 is installed and fixed with wire ties 35, wire ties are also soldered with solder;

- acceptance tests of the cable assembly are carried out.

The proposed technical solution allows you to:

- increase the reliability and durability of the cable network;

- simplify the layout of products, as it provides the optimal direction of output of cable trunks;

- provide shielding of the installation space;

- increase the security of the cable network from static electricity;

- provide heat resistance and fire safety of the cable network;

- increase the efficiency of cable network production.

Information sources

1. RF patent No. 2113041.

2. Technical conditions of GEO.364.126 TU.

3. Technical conditions of GEO.364.241 TU.

4. RF patent No. 2110381.

5. RF patent No. 2360340 (prototype).

Claims (1)

An angular branch pipe (casing) of the electrical connector for each of its reciprocal parts, including response elements for attaching the pipe to the housing of the corresponding part of the electrical connector and a channel for forming and withdrawing the cable trunk from the mounting space, made of thin-walled curved structural elements, characterized in that it is equipped with a stepped sleeve , on one of the steps of which an element of its fastening to the housing of the corresponding part of the electrical connector is made, and on the other, having an external threaded thread - is mounted rotatably about its axis a mounting bracket fixed nut with inner threading which interacts with the external threaded stepped bushing; the mounting bracket is made in the form of a ring equipped with a mounting protrusion directed towards the exit of the cable trunk, a thin-walled mounting bracket for attaching the cable trunk is mounted and fixed on the mounting protrusion of the mounting bracket, which is covered by a thin-walled sleeve of the cable trunk outlet having an open curved protrusion from the side of the mounting space and a groove covering the protrusion of the mounting bracket, and on the output side of the cable trunk is the annular protrusion of the cable shielding me or her fragment; the installation space is limited and protected by a thin-walled volumetric shell made in the form of a sphere conjugated to a cylinder of variable section; a thin-walled shell with an inner surface covers the outer surface of the open curved protrusion of the thin-walled sleeve, the nut of the mounting bracket and its annular part to which it is attached, and a curved cutout covers the thin-walled sleeve of the cable trunk outlet and the mounting protrusion of the mounting bracket.

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