Solid holding bracket for aircraft equipment

FIELD: transport.

SUBSTANCE: holding bracket for aircraft equipment includes flange for attachment to carrying structure, equipment mounting crossbar and intermediate reinforcement element all made of one bended plate of sheet metal. The reinforcement element consists of two reinforcement ribs each one of which is located between flange and crossbar and connected with them by means of elbow connection. Most of reinforcement ribs are placed at an angle, not perpendicular to the main plane of flange passage and the main plane of crossbar passage. Crossbar and flange does not contain other connection than reinforcement ribs, where the reinforcement ribs are connected with both sides of crossbar. Flange and crossbar passage planes are mutually perpendicular. The reinforcement ribs are made flat, expanding as they approach the crossbar and pass in convergent directions thus forming an angle differing from 180. The crossbar has projections in direction perpendicular to plane of flange extending portion and to each side of flange and contains several equipment mounting facilities.

EFFECT: higher strength of holding bracket.

3 cl, 4 dwg

 

The object of the present invention is a monolithic retaining bracket for aircraft on-Board equipment. Aviation equipment, such as gas turbine engines, often contains placed around it a number of accessories, in particular, electric power cables or transmission of signals and commands, as well as pipelines feeding liquid media, which should be placed near the equipment. As a rule, uses a curved retaining brackets, one side of which is bolted to equipment design, and at the other end which hold the cables, pipelines, etc. using screw clamps, plates, made of elastomer, or other means. These holding brackets are usually made by bending of plates of sheet metal, their rigidity is small and should be strengthened by ribs, which are attached to two sides of the sheet metal edges. The rib, as a rule, is welded to the plate continuous or spot welds, lack of which is a significant increase in the time of manufacture and value of these holding brackets.

The main aim of the invention is to provide with a more simple construction of the retaining bracket aviac the traditional avionics, which practically consists of a single plate of sheet metal, bent, without any weld, without a negative effect on the resistance to stress. Thus, in General, the invention relates to the holding bracket aviation equipment containing flange connection to the supporting structure, the yoke mounting hardware and an intermediate element stiffness. The flange element stiffness and yoke made of a single bent plate of sheet metal; and the element stiffness consists of two ribs, each of which is placed between the flange and the head plate and connected with them by means of a bent connection. A large part of the ribs is at an angle not perpendicular to the main plane passing through the flange and the base plane passing beam. Yoke and flange do not contain other compounds in addition to ribs; with the ribs is connected to one side of the bar. Ribs are made flat, and the main plane of passage of the beam flange and perpendicular to each other, and the ribs are in converging directions, forming an angle different from the angle of 180. The traverse has protrusions in the direction perpendicular to the main plane of extension of the flange and the each side of the flange, and contains several tools mounting hardware, and ribs made expanding as it approaches the traverse.

Welded ribs replaced, thus, ribs, fully integrated into the rest of the retaining bracket. Since one and the other side of the bar they are two pieces, they provide good load distribution and, thus, sufficient strength retaining bracket. Because the operations to make limited by cutting sheet metal and bending of the workpiece is cut, thus, the retaining bracket, the manufacture of the retaining bracket is easy and fast.

The resistance of the retaining bracket becomes better if the ribs are flat, and the main plane of passage of the beam flange and perpendicular to each other.

It is believed that the resistance of the retaining bracket is usually high if the structure is closed, and the ends of the blanks cut from sheet metal connected (without the fact that such a connection does not need any welding; even usually tend to avoid it to save the advantages of ease of manufacture). Such isolation is less useful in place of the flange which is firmly held in about the equipment, which the holding bracket. In this case, the flange can be freely divided into two areas, not connected with each other, but connected, respectively, with ribs. The sections of the flange can thus take place in converging directions from their connections with the ribs or in opposite directions from the connection with the ribs.

According to another method of implementation, the ends of the workpiece plate of sheet metal are on the traverse. The flange in this case is solid, and the yoke is divided into two sections, converging from joints with reinforcing ribs and connecting the opposite ends. In this case, also in a natural way without welding or other means tight connection of the ends of the plate.

Now will be described more detailed description of the invention with the aid of the following drawings, in which:

- Fig.1 is a view of the technical solutions according to the prior art;

- Fig.2, 3 and 4 depict three possible practical embodiment of the invention.

The retaining bracket shown in Fig.1, includes a main plate 1, consisting of joint angles 4, the first side surface 2 and the second side surface 3, which are arranged in the form of a bend or have a different angular the second form. Side surfaces 2 and 3 are also United by one reinforcing ribs 5, which relies on two edges, respectively, 6 and 7.

Connection is made by welding. One of the side surfaces 2 is the flange that holds the bolts 8 attachment to the structure 9 of the aircraft, and the second side surface 3 - traverse, which holds in this particular case, the practical implementation of the hose clamp 10 and the clamping bracket 11 with two opposite elastic plates for holding cables or pipelines 12.

The retaining bracket according to the invention, consists of a single plate 13 of sheet metal, shown in Fig.2, the bent after cutting. It forms part of the flange 14 to be attached to the structure 9 (in this case not shown), which contains holes 15 for mounting bolts. Next, you can see a couple of ribs 16 and 17, the yoke 18, the retaining hardware connection of cables and pipelines, such as the clamp 10. Each of the ribs 16 and 17 are connected with the flange 14 and the head plate 18 through connection 19, which correspond to the folds of the sheet metal. In this case, these compounds are essentially bends at a right angle, and the ribs 16 and 17 are curved approximately one quarter of the circle. So the m way formed retaining bracket or flange 14, held in a vertical plane (see Fig.2), yoke 18 is in the horizontal plane, the ribs 16 and 17 in vertical planes perpendicular to the previous main sections 20 passing with a small inclination relative to the vertical. Yoke 18 comprises end plates of sheet metal, forming a converging sections 21 and 22, which are at each other at the connection point 23. The connection can be carried out without or with separation of 24 one end 21. The ends 21 and 22 are provided with bolt hole 25 on the end 23 to ensure their screw connections with each other, and the clamp 10. The plane of the ribs 16 and 17 may be parallel or not parallel, and in this case, the retaining bracket 13 has a generally convex shape of a rectangle or trapezoid, with the head plate 18 and flange 14 are the same or different widths; it is not critical to the characteristics of the holding bracket 13.

This retaining bracket having a closed chord and shape of a hollow box, is especially strong even with a fairly thin sheet metal, due to, among other things, a good perception of the loads exerted on the clamp 10, the ribs 16 and 17, which are located symmetrically one on each of its sides, or a weak ledge consider is Ino flange 14, due to the small inclination of their main areas 20; and the connections 19 are continuous and rounded. All this leads to the formation of small stress concentration, and there is no weak areas.

Such properties are marked in other ways possible practical implementation of the invention, represented in Fig.3 and 4. The retaining bracket 32 shown in Fig.3, contains, as before, the flange 26, a pair of reinforcing ribs 27 and 28 and the yoke 29. These structural elements are interconnected via connections 30, similarly curved, as shown in Fig.2, so that the ribs 27 and 28 were connected by their ends to the flange 26 and the head plate 29 and that the latter were separated from each other and were not connected with each other in any other way. We present the main differences in comparison with the practical implementation is shown in Fig.2. First of all, the flange 26 is made in the form of two legs 26a and 26b, separated from each other and passing in different directions from the place of their connection 30 with the corresponding ribs 27 and 28. The plane of the ribs 27 and 28 are no longer perpendicular to the plane of the head plate 29, but inclined to it so that they coincide with each other, forming an acute angle from the legs 26a and 26b, and the retaining bracket 32 has a generally trapezium-shaped. PR is this no longer the inclined position of the ribs 27 and 28 relative to the flange 26; they rise from the surface of the flange 26, not away from him. In this case, the yoke 29 is continuous and monolithic. She comes with a large extension in the direction perpendicular to the plane of the flange 26, with one and the other side of it, which eliminates the ledge and allows a greater number of bolt holes 31, than according to the previous implementation. The ribs 27 and 28 extend to the cross beam 29 to the best of her hold.

How would this practical implementation outwardly not much different from the previous, its primary properties are saved, just the ends of the bent plate to a greater extent located on the flange 26 than on the cross beam 29. There is no loss of adhesion compared with the previous implementation, even if the retaining bracket 25 does not apply to the closed design, because the design of the 9 provides the connection between the legs 26a and 26b. Closed retaining bracket head plate 29 can also be achieved if the ribs 27 and 28 are not parallel to each other and converge. The main extension of the bar 29 in a direction more perpendicular than parallel to the flange 26, as has been the case depicted in Fig.2, also does not adversely affect the stability of the retaining bracket, because its average relative to the Lanza ledge 26 is weak.

Now with reference to Fig.4 will describe another way of practical realization of the retaining bracket 33. It is similar to the method shown in Fig.3, but only this console, in this case 34, mainly takes place in the same direction as the flange 26, and ribs, in this case 35 and 36 do not extend to him. This retaining bracket 33 having a simple design and small dimensions, suitable for holding a smaller number of structural elements, otherwise it will have excessive elongation. It may also contain a number of holes 37 for bolts, located mostly in the direction of extension of the flange 26.

There may be other ways of practical implementation.

1. The retaining bracket (32) aircraft equipment (12)containing a flange (26) joining the supporting structure (9), yoke (29) securing equipment and intermediate element stiffness; and a flange, the element stiffness and yoke made of a single bent plate of sheet metal; and the element stiffness consists of two ribs (27, 28), each of which is placed between the flange and the head plate and connected with them by means of a bent connection (30), and most of the ribs is at an angle not perpendicular to the main plane of the passer is placed flange (26) and the base plane passing beam (29); moreover, yoke and flange do not contain other compounds in addition to ribs; with the ribs is connected to one side of the bar, and the ribs are made flat, and the main plane of passage of the beam flange and perpendicular to each other, and the ribs are in converging directions, forming an angle different from the angle of 180, and the traverse has protrusions in the direction perpendicular to the main plane of extension of the flange and to each side of the flange, and contains several tools (31) securing equipment, and ribs (27, 28) is executed expanding as it approaches the traverse (29).

2. The retaining bracket under item 1, in which the flange (26) is divided into two interconnected plot (26a, 26b) and respectively connected to the ribs.

3. The retaining bracket on p. 2, characterized in that the sections are in opposite directions from the joints with reinforcing ribs.



 

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