CN2393821Y - Frame of helicotoper cabin - Google Patents

Abstract

The utility model relates to a tube beam frame of a front cabin cover of a helicopter. The entire front cabin cover is composed of a closed, twisted and nonprismatic tube beams and wall boards. The front part of the tube beam frame of a front cabin cover of a helicopter is an annular beam. The middle of the annular beam is provided with a center beam protruding forward. The upper part and the front lower part of the annular beam are provided with two wall boards. The cross section of the tube beam forms a polygon. As the wall thickness and the shapes of the tube beams are different, and the tube beams are connected by joints which are manufactured into a whole with the tube beams, the utility model has the advantages of small weight, and less number of parts and is suitable for various different strength requirements, satisfying the requirements of pilots' visual field.

Description

Helicopter front deck shield tubular skeleton

The utility model relates to a kind of tubular skeleton that is applicable to the light helicopter front deck shield.

The front deck shield of existing helicopter is riveted structure mostly in the world, by sealed tube beam behind the bending forming and blanked part riveting molding.This structure is owing to the framing member at the front deck shield position of helicopter all is associated with the fuselage external form basically, the profile of many parts or part profile are that envelope of surfaces forms, this curved surface all is again a conicoid, processing is difficulty very, and number of parts is many in addition, and quality is difficult to guarantee during the riveted joint assembling, and, it is big to expend man-hour multiple amount, and it is many to take up room, and this is beyond affordability for narrow and small light helicopter passenger cabin.

The purpose of this utility model is, provide a kind of suitable fuselage external form and process the little lightweight helicopter front deck shield tubular skeleton of simple volume.

Technical solution of the present utility model is, pipe beam and wallboard with sealing, distortion, variable section constitute whole front deck shield, the front portion of skeleton is an annular girder, there is an outstanding forward center sill centre of annular girder, the upper lateral part of annular girder has two longitudinal beams backward to be used to support wainscot and to be connected with the central structure of aircraft, and two wallboards are equipped with in its top and preceding bottom; The cross section of Guan Liang is the polygon that does not wait wall thickness; The termination of Guan Liang is a jointing, and the exhibition length direction also has flange, is used for linking to each other with other member.

The utility model has been compared tangible advantage with existing front deck shield, because wall thickness, the shape of Guan Liang have nothing in common with each other, connection between the Guan Liang is by being connected with joint that Guan Liang makes one, this just makes the weight of skeleton reduce greatly, number of parts reduces, and be suitable for various requirement of strength, satisfy aviator's visual field requirement.

Fig. 1 is a pipe beam framework front elevation of the present utility model;

Fig. 2 is part pipe beam section figure of the present utility model;

Fig. 3 is the instance graph of beam section on the utility model side;

Fig. 4 is the structure example figure of the utility model wainscot;

Fig. 5 is the structure example figure of the utility model front panel;

The skeleton of front deck shield is made up of upper left beam 5, upper right beam 2, left front beam 7, right front beam 4, preceding upper beam 6, center sill 1, wainscot 3, front panel 8 and attaching parts, six beams are the hollow tubular girder construction, center sill 1 two ends and side 5,2 front ends of putting the beams in place have the joint that is connected usefulness, and attaching parts is used for connection between each Guan Liang with increase bonded assembly intensity and rigidity.

In order to be connected with other part or to be equipped with for the ease of other choosing installing is installed, the cross-sectional plane of each Guan Liang all has been designed to different form (see figure 2)s.With the side upper beam is the example (see figure 3): the frame of A face and hatch door and side adapter plate 11 is complementary, and must be parallel with it, and at this face the locked pin plate 13 that hatch door and side adapter plate are used will be installed also; The B face is used to install the flute profile sealing band 10 that hatch door is used; The C face is used for glueing joint with wainscot 3 and ceiling glass 9; The handle of using when chaufeur is boarded is installed on the E face; The F face is used to install the circular seal bar 12 of hatch door sealing usefulness.Each face is because the stressing conditions difference all has been designed to different-thickness, and the zone and the stressed serious district that need on each face other part is installed have all carried out local reinforcement (increase thickness and improve intensity).Each Guan Liang has the theoretical profile of a face and fuselage parallel, because the theoretical profile of fuselage is all formed by the double curved surface envelope, so the parallel faces of every Guan Liang and theoretical profile and opposite face thereof (for example the C face and the E face of side installation doorframe among Fig. 3) all are to be made of the hyperbolic that is parallel to theoretical profile; With hatch door frame and side fixedly the opposite face of sheet frame also require parallel with it.Guan Liang is the same at the width of the direction of normal of theoretical profile, has so just guaranteed the continuity of cabin interior profile.So left front beam 7, right front beam 4, center sill 1, left and right upper beam 5,2 are parallel with chaufeur in this regional sight line owing to requiring chaufeur that maximum visual field is arranged near windshield one side, owing to above-mentioned requirements is arranged, so Guan Liang has been designed to the varying cross-section duct beam of spatial warping.

Wallboard is in order to form a complete passenger cabin with hatch door, windshield, to play protection occupant and the effect that obtains a good aerodynamic configuration.In order to link to each other with other member, satisfy the requirement (two blocks of ceiling glass are installed) of outside visiblity, the equipment such as last slide rail of slip hatch door are installed, and wainscot 3 has been made the recessed structure of both sides, this structure be for fear of with the slip hatch door on slide rail interference and design-calculated (seeing the B-B tangent plane).The surfaces externally and internally of wainscot 3 is equipped with many inserts, is used to install equipment such as ventilation demister system, preceding last cover, slip hatch door, last slide rail.And the main effect of front panel 8 is to improve the rigidity of this structure and support windshield.

Claims (2)

1. the helicopter front deck shield tubular skeleton of forming by the sealed tube beam, it is characterized in that, the pipe beam and the wallboard of distortion, variable section constitute whole front deck shield, the front portion of skeleton is an annular girder, there is an outstanding forward center sill centre of annular girder, the upper lateral part of annular girder has two longitudinal beams backward to be used to support wainscot and to be connected with the central structure of aircraft, and two wallboards are equipped with in its top and preceding bottom; The cross section of Guan Liang is a polygon; The end of Guan Liang is a jointing, and the exhibition length direction has flange.

2. helicopter front deck shield tubular skeleton according to claim 1 is characterized in that the cross section of Guan Liang is quadrangle or pentagon, and the wall thickness on each limit is all inequality.

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