CN202686753U - Cockpit cover door frame for helicopter - Google Patents

Abstract

The utility model relates to the field of design of helicopters, and provides a cockpit cover door frame for a helicopter. The quadrilateral cockpit cover door frame for the helicopter is encircled by three pipe beams and a U-shaped structural component, wherein each pipe beam and the U-shaped component are sunken along the length direction so as to be matched with a cabin door to meet a theoretical shape requirement; the left side of the door frame is a foam sandwich plate which is formed by connecting an upper pipe beam and a left pipe beam; the foam sandwich plate is connected with the front frame of the helicopter; the lower side of a lower pipe beam is a laminated plate which is connected with the lower component of the helicopter; the right side of the door frame is provided with a U-shaped structure which is connected with a back door frame or a window frame. By utilizing the cockpit cover assembled by the cockpit cover door frame, connecting pieces such as joints required for assembling a separated cockpit cover are greatly reduced, the assembly process is simplified, the weight of the structure is reduced, the rigidity of the cockpit cover is greatly improved, and the total cost is reduced.

Description

Helicopter cockpit door frame

technical field

The utility model relates to the field of helicopter design, in particular to a door frame of a helicopter cockpit cover.

Background technique

The structure of the existing helicopter cockpit cover door frame is a separate design, that is, the composite material forming pipe beam, composite material laminate (skin), honeycomb structure forming plate and composite material joints, etc. It is manufactured by the method of riveting and curing in the furnace. The pipe beams, laminates, and honeycomb structure forming panels of this structural form are all individually manufactured and formed parts, with a large number, and there are many parts that need to be coordinated and matched during assembly. It is difficult to guarantee the assembly quality, and it takes a lot of man-hours. It is heavy; the overall deformation of the cockpit cover is also difficult to control, and it is often difficult to assemble it with the fuselage.

Utility model content

The technical problem to be solved by the utility model: the utility model provides a helicopter cockpit cover door frame with a plurality of closed pipe beams of composite materials and a sandwich structure integrally co-solidified, light in weight, less difficult to assemble, high in rigidity, and small in deformation.

The technical scheme of the utility model: a helicopter cockpit cover door frame, the whole of the helicopter cockpit cover door frame is surrounded by three pipe beams and a U-shaped structural part to form a quadrilateral, and each pipe beam and U-shaped parts extend in the direction of sag, so that the installation with the hatch meets the theoretical shape requirements; the left side of the door frame is a foam sandwich panel connected with the upper tube beam and the left tube beam, and is connected with the front frame of the fuselage; the lower side of the lower tube beam is a layer The pressure plate is connected with the lower part of the fuselage; the U-shaped structure on the right is connected with the rear door frame or window frame.

Beneficial effects of the utility model: the cockpit cover assembled by the door frame of the cockpit cover has obvious advantages compared with the existing structure of the separated cockpit cover. Due to the hybrid structure of pipe beams, foam sandwich panels, and laminated panels, the joints and other connecting parts required for the assembly of separate canopies are greatly reduced, the assembly process is simplified, the structural weight is reduced, and the rigidity of the cockpit canopy is greatly improved. Reduced total cost. This structural form is suitable for various strength and rigidity requirements, and meets the pilot's visual field requirements. The utility model can be widely used on the cockpit cover of the helicopter.

Description of drawings

Fig. 1 is the co-curing schematic diagram of the utility model.

Fig. 2 is a cross-sectional view of the pipe beam 1 in Fig. 1 .

Fig. 3 is a cross-sectional view of the pipe beam 2 in Fig. 1 .

FIG. 4 is a cross-sectional view of the pipe beam 3 in FIG. 1 .

FIG. 5 is a sectional view of the U-shaped structure 4 in FIG. 1 .

Fig. 6 is a structural example diagram of the utility model.

Detailed ways

The door frame of the cockpit cover is shown in Figure 1. It is integrally formed by an upper tube beam 1, a left tube beam 2, a lower tube beam 3, a U-shaped structure 4, a foam sandwich panel 5, a laminated panel 6, and a foam 7. The three pipe beams are all hollow structures, and the pipe beams 2 and 3 are all of equal cross-sectional area. Considering that there is enough space in the cockpit and the door frame has sufficient rigidity, in addition, for the convenience of manufacturing, the pipe beam section The direction length and width are between 30mm and 40mm; in order to increase the rigidity of the skin, the front area of the pipe beam 2 is designed as a foam sandwich structure 5 (the section is shown in Figure 3); the shape of the front end of the pipe beam 1 is relatively complicated, and the pipe The form of sandwiching foam in the beam is formed (foam 7 is not taken out after curing and forming), following the hyperbolic theoretical shape, the elongation of the cross-sectional area of the pipe beam gradually increases toward the opening direction, and the top of the pipe beam is designed to a certain size according to the thickness of the glass Sinking (see Figure 6, 6e and Figure 2); according to the size of the hatch and the theoretical shape requirements, determine the size of the surrounding sag, in order to ensure smooth mold release after molding, design the sag at a certain angle (the section is shown in Figure 3) The lower side of the tube beam 3 is designed as a laminated plate 6 (section as shown in Figure 4), which is connected with the fuselage structure; the right side is designed as a U-shaped structure 4 (section as shown in Figure 5), and the rear cockpit cover Door frame or window frame for connection.

Install the door lock on the door frame (6a, 6b as shown in Figure 6, install the door switch strut on the 6c surface, install two hinge seats on the 6d surface, design the installation place as a depression and an opening, and install it on the pipe beam 1 (The cross-section is shown in Figure 2), the boarding handle is installed on the inside, and each surface is designed with different thicknesses due to different stress conditions. Lay layers to achieve).

In order to ensure a good flight aerodynamic effect, the entire surface of the door frame is parallel to the theoretical shape of the fuselage, so the surface of the pipe beam and the door should be parallel to the theoretical shape; the surface of the pipe beam matched with the windshield is also parallel to the theoretical shape , to ensure a good view of the driver at the windshield.

Claims (1)

1. helicopter cockpit cover doorframe, it is characterized in that, the integral body of helicopter cockpit cover doorframe surrounds a quadrangle with three Guan Liang and a U-shaped framing member, and each Guan Liang and U-shaped elongatedness direction are made sagging, meets theoretical shape requirement so that cooperate to install with hatch door; The doorframe left side is the foam layer plate that links together with upper Guan Liang and left Guan Liang, and links to each other with frame before the fuselage; Lower pipe beam downside is ply wood, is connected with the fuselage lower member; The right side is U-shaped structure, is connected with rear door frame or window frame.

Images