RU2260256C2 - Electronic equipment rack frame - Google Patents

Abstract

FIELD: radio engineering; electronic-equipment bearing structures, mainly mobile ones.

SUBSTANCE: proposed rack frame for electronic equipment designed for use in geophysical instrumentation engineering and in any kind of transport, including seagoing and aerospace vehicles, and in all mobile and stationary systems has shaped vertical braces in the form of L-shaped stepped box with inner stiffening rings, T-shaped slots on external ends of its shelves with T-shaped slot oriented along its angle bisectrix, shaped horizontal braces joined together to form frames, and angle connectors; the latter are made in the form of set of angle pieces with fastening holes; additional T-shaped slot and shelf are provided on outline of vertical braces and disposed on L-shaped outline; horizontal braces are made of shaped material whose modulus of elasticity is lower than 18 kg/mm²; external surface of horizontal-brace frame is disposed in same plane as butt-ends of vertical braces and as common abutting planes of external angle pieces; internal angle pieces are disposed on inner surface of horizontal braces; additionally introduces facing panels are secured on vertical braces in a spaced relation between frame and panels.

EFFECT: enhanced vibration impact strength.

1 cl, 10 dwg

Description

The invention relates to radio engineering and can be used in the supporting structures of electronic equipment, mainly mobile.

Known frame rack of electronic equipment [1], which contains profiled vertical and horizontal ties, interconnected by means of angular connectors in the form of volumetric squares, guides for blocks and fasteners in the form of screws, lock nuts and embedded slats with threaded holes. The cross-sectional profile of the additional horizontal screeds of each horizontal screed is L-shaped with a T-groove at the free end of one of its shelves and with a U-shaped groove at the free end of its other shelf. The cross-sectional profile of the main horizontal screed is made of an H-shaped with a T-groove on its horizontal shelf. The cross-sectional profile of each vertical screed is made in the form of a L-shaped stepped box with internal stiffeners, T-grooves on the steps on the outer sides of its shelves, with an additional shelf on the inner side of one of its shelves and with a T-shaped groove oriented along bisectors of its angle. The guides are made with shoulders, in additional shelves of the cross-sectional profile of the vertical couplers, grooves are made for the fixing screws and for the beads of the guides with the installation step of the latter. The main horizontal ties are interconnected by means of an integral connection with the formation of frames. Additional horizontal ties are fastened between the corresponding vertical ties on the corresponding main horizontal ties with the possibility of interaction of the walls of their U-shaped grooves with the vertical shelf of the U-shaped profile of the main horizontal ties with the formation of a box-shaped cross section. And each of the corner connectors is fastened to the corresponding vertical coupler using fixing screws and lock nuts placed in the T-grooves of the L-shaped profile of its cross section, including the angle of the L-shaped profile of its cross section oriented along the bisector. A disadvantage of the known framework is that the horizontal ties are made of profiled aluminum alloys that have a low modulus of elasticity (not more than 7.5 kg / mm ² ). Therefore, to transfer concentrated shock loads in the corners of the frame, steel additional intermediate parts are installed: volumetric corner connectors and a bottom steel shock-absorbing base, which evenly distribute the loads along the entire contour of the horizontal frames and thereby provide the necessary impact strength of the frame. These parts have a high laboriousness of manufacturing (additionally at least 50% of the laboriousness of the carcass) and a large weight in comparison with aluminum carcass parts, which reduces the efficiency of using aluminum horizontal screeds, leaving them mainly with a decorative function. In addition, the sharp edge of the H-shaped profile of horizontal screeds makes it difficult to install various devices on them without additional intermediate parts such as a chipboard panel, load-bearing beams, etc. for the formation of mounting or work planes.

An additional, flat shelf on the inner contour of the vertical couplers limits the use of devices fixed to it by the size and pitch of the grooves made specifically for this purpose. Stepless fixing of nodes on these shelves is impossible. All this reduces the functionality of the frame.

Despite this, the frame passed tests on the USSR Maritime Register for an impact load of 10 g, after which it found application in geophysical measuring and registration equipment, stationary and mobile communications, it is used in automobile, railway, river and sea transport, as well as in the aerospace complex.

The present invention solves the problem of reducing the complexity of manufacturing and expanding the functionality of the frames.

New in relation to the prototype is that in the rack frame of electronic equipment having profiled vertical ties in the form of a L-shaped stepped box with internal stiffeners, with T-shaped grooves on the outside of its shelves with a T-shaped groove oriented along the bisector its angle, profiled horizontal ties connected to frames, corner connectors, corner connectors are made in the form of a set of scarves with holes for fasteners, the profile of vertical ties has additional T-profiles ny recess and a shelf located on the T-shaped contour, horizontal ties are made of profiled metal having sufficient elastic modulus of not less than 18 kg / mm ^2, the outer plane of the frame horizontal screed located in the same plane with the ends of vertical tie and general location plane outer the kerchief, and the inner kerchiefs are located on the inner plane of the horizontal couplers, and additionally, facing panels fixed on the vertical couplers with a gap between the frame and the panels are introduced.

The implementation of horizontal screeds of profiled metal having an elastic profile of not less than 18 kg / mm ² , for example, of sheet steel, allows the concentrated load to be transferred to the supports, which leads to the rejection of additional parts, namely from the shock-absorbing base and volumetric corner connectors made casting or welding followed by machining in three planes.

The decorative function, if necessary, is performed by additional horizontal L-shaped ties.

By changing the grade of the standard sheet material and its thickness within small limits of about 1-2 mm for the manufacture of horizontal screeds without changing the design of the entire frame and increasing the complexity of its manufacture, it becomes possible to increase the load capacity of the frame by 2.5 or more times. A further increase in the strength of the horizontal couplers is impractical without an increase in the strength of the vertical couplers.

An increase in the load capacity of horizontal screeds pressed from aluminum alloys by changing the grade of the material is complicated by the technology of pressing profiles and the fact that with an increase in the strength of the profile material, for example, by 2 times when replacing AD31T1 alloy with D16AT1 alloy, the elastic modulus increases by 1.4% and for increased loads on shock absorbers will need to adequately increase the reference area of the horizontal frames, while changing the design.

Name Unit Alloy grade indicator measuring AD31T1 D16AT1 Tensile strength Kg / mm ² 25 43.5-48 Elastic modulus Kg / mm ² 7100 7200

The implementation of the corner connectors in the form of a set of flat scarves with holes for fasteners instead of bulk significantly reduces the complexity of manufacturing and allows you to change the design of the corner joints during the design, manufacture and operation of electronic equipment in accordance with the conditions.

In addition, the scarves additionally distribute the concentrated load over the large surface of the horizontal frames, giving them additional rigidity, and strengthen the working section in the most loaded place, without increasing the thickness and weight of the entire frame. Changing the working cross-section can be done both during assembly and during operation when changing loads or mounting conditions.

External kerchiefs unload bolts of fastening from work on a cut, since transfer the load directly from the vertical couplers to the supporting surface. Decorative profiles, facing panels, doors are attached to the scarves.

An additional T-shaped groove with a shelf on the inner contour of the vertical couplers provides both stepless fastening of the plug-in devices in any positions and stepwise fastening with the help of pre-made grooves.

The outer plane of the frame, located in the same plane with the ends of the vertical screeds and the common adjacent plane of the outer scarves, creates an external mounting plane, the use of which allows you to join the frames, fastening them together and obtaining spatial structures of the same design, for example, in the form of a rack, cabinet, single-table table or dvukhtumbovy, corner table, consoles with different spatial arrangement of elements. Docking of frames can be performed both during assembly of frames and in the presence of electronic equipment in them.

The introduction of cladding panels mounted on vertical screeds with a gap between the frame and the panels increases the natural ventilation of the frame due to the natural convection of air without creating additional special holes and increases the natural heat sink.

All of the above indicates that the claimed device is new and meets the criterion of "inventive step".

The technical essence of the invention is illustrated by drawings, where:

Figure 1 shows a General view of the frame;

Figure 2 shows a section along aa;

Figure 3 shows a section along BB and the second embodiment of the vertical couplers;

Figure 4 shows a section along BB;

Figure 5 shows a section along G-G;

Figure 6 shows a section along DD;

Figure 7 shows examples of layout tables;

On Fig shows examples of the layout of racks, consoles;

Figure 9 shows examples of the location of workplaces at tables and desks tables;

Figure 10 shows a cross section along EE.

The rack frame of electronic equipment has profiled vertical ties 1 in the form of a L-shaped stepped box with internal stiffeners, with T-grooves on the outside of its shelves with a T-groove oriented along the bisector of its angle, a T-shaped groove and shelf 2 located on the longitudinal or transverse shelf of the inner contour, and profiled horizontal ties connected to frames 3, corner connectors are made in the form of a set of scarves 4, 5 with holes for fasteners. Horizontal ties connected to frames 3 are made of profiled metal having an elastic modulus of at least 20 kg / mm ²

The outer plane of the horizontal screed frame 3 is located in the same plane as the ends of the vertical screed 1 and the common adjacent plane of the outer scarves 5, and the inner scarves 4 are located on the inner plane of the horizontal screed 3. The frames 3 are closed by a decorative profile 6. On the side and the back surfaces are installed facing panels 7, which are fixed on vertical ties with a gap between the frame 3 and the panels 7.

Tables consist of a rack frame 8 and a table frame 9.

Racks and consoles can be composed of several, two or more, frames 8 and the head of the remote control 10, while this may be a different arrangement of the workstations of operators 11 around one rack.

The frame is installed on the foundation, built-in appliances are fixed on the vertical ties. The load from the embedded devices through vertical ties 1 and a set of scarves 4 and 5 is transferred to the foundation. At the same time, the weight of the structure decreased while maintaining the strength characteristics.

Facing panels 7, which are mounted on vertical screeds with a gap between the frame 3 and the panels 7, create an additional exhaust of heated air from the frame of the rack, which allows you to do without forced ventilation.

The rack frame of electronic equipment has increased vibration resistance and can be used in geophysical instrumentation, as well as in any type of transport, including sea transport and aerospace transportation, in any mobile and stationary complexes.

Sourse of information

1. USSR author's certificate No. 1644408, IPC N 05 K 7/14, 1988 (prototype).

Claims (1)

The rack frame of electronic equipment containing profiled vertical ties in the form of a L-shaped stepped box with internal stiffeners, with T-shaped grooves on the outer sides of its shelves with a T-shaped groove oriented along the bisector of its angle, profiled horizontal couplers connected in frames , corner connectors, characterized in that the corner connectors are made in the form of a set of scarves with holes for fasteners, the profile of the vertical couplers has an additional T-slot and a shelf, located horizontal screeds made of profiled metal having an elastic modulus of at least 18 kg / mm ² , the outer plane of the horizontal screed frame is located in the same plane as the ends of the vertical screeds and the common adjacent plane of the outer scarves, and the inner scarves are located on the inner plane of the horizontal couplers and additionally introduced facing panels mounted on vertical couplers with a gap between the frame and the panels.

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