CN210984977U

CN210984977U - Airborne electronic equipment overlap joint structure

Info

Publication number: CN210984977U
Application number: CN201921533678.0U
Authority: CN
Inventors: 周海亮
Original assignee: Luoyang Institute of Electro Optical Equipment AVIC
Current assignee: Luoyang Institute of Electro Optical Equipment AVIC
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-07-10
Anticipated expiration: 2029-09-16

Abstract

The utility model relates to a machine carries electronic equipment overlap joint structure, including overlap joint post and overlap joint line, the overlap joint post is fixed on the equipment panel, and the overlap joint post comprises ground connection post, lug and the annular knurl nut of taking the spring. The lap joint line comprises two joints and a braided sleeve, and one end of the lap joint line is pressed and fixed on the grounding post by a knurled nut. The lap joint structure avoids lap joints of the lap joint line and the equipment, and can ensure the lap joint resistance requirement of the lap joint line and the equipment, thereby providing good grounding performance for the equipment and the airplane structure; and the crossover can be replaced without any special tool when the crossover is damaged or corroded.

Description

Airborne electronic equipment overlap joint structure

Technical Field

The utility model relates to an airborne electronic equipment overlap joint structure.

Background

The lap joint is the lap joint of the airborne electronic equipment and the airplane structure so as to lead the equipment shell to be grounded.

Reliable lap joints can provide a low impedance path between equipment and an aircraft structure, prevent electromagnetic interference between the equipment, and are also necessary measures for preventing electric shock, electrostatic protection and lightning protection. Whether the lap joint is good or not directly influences the functional performance of the airborne electronic equipment, thereby influencing the safety of the airplane.

At present, most of airborne electronic equipment and a machine body are connected by adopting a bonding wire, and one end of the bonding wire is fastened on an equipment panel by a screw. The lap joint structure seriously influences the conductivity of the lap joint line because a gap exists between the head part of the screw and the gasket, and can not ensure the grounding resistance requirement of equipment; moreover, during the use of the device, the crossover wires need to be replaced by special tools when damaged or corroded.

Disclosure of Invention

Technical problem to be solved

In order to avoid the weak point of prior art, the utility model provides an airborne electronic equipment overlap joint structure.

Technical scheme

The lap joint structure of the airborne electronic equipment is characterized by comprising a lap joint column and a lap joint line, wherein the lap joint column comprises a grounding column, a wiring piece and a knurled nut with a reed, M4 threads are arranged on two sides of the grounding column, the wiring piece is used for welding a structural ground in the equipment, and the knurled nut with the reed is used for locking and fixing the lap joint line; the knurled nut with the reed comprises a spring piece, an end tooth washer and a knurled nut body, one end of the spring piece penetrates through the grounding column and is fixed between the grounding column and the equipment panel, and the other end of the spring piece is fixed between the end tooth washer and the knurled nut body, so that the knurled nut body can be prevented from falling off accidentally when being screwed off from the grounding column; the lap joint line comprises two joints and a weaving sleeve, wherein one joint is sleeved at each of two ends of the weaving sleeve and is flattened and firmly welded by soldering tin; the ground post penetrates through the equipment panel, the lug plate is introduced into the other side of the equipment panel, the ground post, the equipment panel and the lug plate are fixed through the washer and the nut, the lap joint line penetrates through the other side of the lug plate, and then the knurled nut with the reed is screwed tightly.

The specification of the woven sleeve is P10 × 16, and the length is 90 mm.

The joint material is a copper strip, and the surface treatment is silver plating.

Advantageous effects

The utility model provides a machine carries electronic equipment overlap joint structure, including overlap joint post and overlap joint line, the overlap joint post is fixed on the equipment panel, and the overlap joint post comprises terminal, lug and the annular knurl nut of taking the spring. The lap joint line comprises two joints and a braided sleeve, and one end of the lap joint line is fixed on the grounding post by a knurled nut body. The lap joint structure avoids lap joints of the lap joint line and the equipment, and can ensure the lap joint resistance requirement of the lap joint line and the equipment, thereby providing good grounding performance for the equipment and the airplane structure; and secondly, the lap joint line can be replaced without any special tool when being damaged or corroded.

Drawings

FIG. 1 is a schematic view of a lapping structure

FIG. 2 shows a lap joint column

FIG. 3 a schematic view of a ground stud

FIG. 4 is a schematic view of a lug

FIG. 5 shows a knurled nut with a leaf

FIG. 6 is a schematic view of a spring plate

FIG. 7 end tooth washer schematic

FIG. 8 knurled nut schematic

FIG. 9 schematic illustration of a crossover

FIG. 10 schematic view of a lapped braided sleeve

FIG. 11 a schematic view of a lap joint

1-grounding column 2-equipment panel 3-lug 4-washer 5-nut 6-lapping wire 7-knurled nut with reed 8-spring leaf 9-end tooth washer 10-knurled nut body 11-joint 12-braided sleeve

Detailed Description

The invention will now be further described with reference to the following examples and drawings:

the overlap joint structure comprises overlap joint post and overlap joint line, and the assembling process is: firstly, the grounding post 1 penetrates through the equipment panel 2, the lug 3 is introduced into the other side of the panel, the grounding post 1, the equipment panel 2 and the lug 3 are fixed by a gasket 4 and a nut 5, a lap joint line 6 penetrates through the other side of the binding post 1, and then a knurled nut 7 with a reed is screwed tightly. As shown in fig. 1.

The lap post is composed of a grounding post 1, a lug 3 and a knurled nut 7 with a reed, as shown in fig. 2. The grounding post 1 is threaded at both sides with M4 as shown in fig. 3. The lug 3 is used for welding structural grounds in the equipment, as shown in fig. 4. The knurled nut with spring 7 is composed of a spring 8, an end tooth washer 9 and a knurled nut body 10 for locking the fixed crossover 6, as shown in fig. 5.

One end of the spring piece 8 penetrates through the grounding column 1 and is fixed between the grounding column 1 and the equipment panel 2, and the other end of the spring piece is fixed between the end tooth washer and the knurled stud, so that the knurled nut body 10 can be prevented from falling off accidentally when being unscrewed from the grounding column 1, as shown in fig. 6.

The end tooth washer 9 has the effects that when the knurled nut body 10 is screwed under the pretightening force provided by a hand, the lap joint line 6 and the grounding column 1 are reliably pressed, the end tooth provides point contact, when the knurled nut body is screwed under the pretightening force provided by the hand, the lap joint line and the grounding column are reliably pressed, and the contact resistance between the lap joint line 6 and the grounding column 1 is reduced, as shown in fig. 7.

The knurled nut body 10 is used as a fastener, a screw hole is formed in one end of the body, an internal thread is formed in the inner wall of the screw hole, a cap hole and a cap brim are formed in the other end of the body, the aperture of the cap hole is smaller than that of the screw hole, and a pattern structure is arranged on the outer surface of the body, as shown in fig. 8. The novel screw-on tool can be screwed up without a special tool during use, the pattern structure on the outer surface can guide a user to uniformly apply force when pressing, the novel screw-on tool is not easy to slip, and the novel screw-on tool can be detached without the special tool during unscrewing, so that the novel screw-on tool is very convenient.

The crossover 6 is composed of two terminals 11 and a braid 12 as shown in fig. 9, one terminal 11 is respectively provided at both ends of the braid 12 and flattened and welded with solder, the braid 12 has a specification of P10 × 16 and a length of 90mm, the resistance value of the crossover is 370 microohm as shown in fig. 10, and the terminals 11 are made of copper tape and surface-treated with silver plating to ensure that the resistance value between the braid and the terminals is not more than 50 microohm as shown in fig. 11.

Claims

1. The lap joint structure of the airborne electronic equipment is characterized by comprising a lap joint column and a lap joint line (6), wherein the lap joint column comprises a grounding column (1), a wiring piece (3) and a knurled nut (7) with a reed, M4 threads are arranged on two sides of the grounding column (1), the wiring piece (3) is used for welding a structural ground in the equipment, and the knurled nut (7) with the reed is used for locking and fixing the lap joint line (6); the knurled nut (7) with the reed comprises a spring piece (8), an end tooth gasket (9) and a knurled nut body (10), one end of the spring piece (8) penetrates through the grounding column (1) and is fixed between the grounding column (1) and the equipment panel (2), and the other end of the spring piece is fixed between the end tooth gasket (9) and the knurled nut body (10), so that the knurled nut body (10) can be prevented from accidentally falling off when being unscrewed from the grounding column (1); the lap joint line (6) comprises two joints (11) and a weaving sleeve (12), wherein one joint (11) is sleeved at each of two ends of the weaving sleeve (12) and is flattened and firmly welded by soldering tin; firstly, the grounding post (1) penetrates through the equipment panel (2), the lug plate (3) is transmitted into the other side of the equipment panel (2), the grounding post (1), the equipment panel (2) and the lug plate (3) are fixed by a gasket (4) and a nut (5), a lap joint line (6) penetrates into the other side of the grounding post (1), and then a knurled nut (7) with a reed is screwed tightly.

2. An on-board electronic device overlap structure according to claim 1, wherein the knitted jacket (12) has a gauge P10 × 16 and a length of 90 mm.

3. The lap joint structure of airborne electronic equipment according to claim 1, characterized in that the material of said joint (11) is copper tape and the surface treatment is silver plating.