A hanging point structure for boarding ladder on the side of seaplane fuselage

Abstract

The present application provides a structure for the hanging point of the boarding ladder on the side of the fuselage of a seaplane, which belongs to the technical field of aircraft fuselage design. The structure includes two units, the hanger box of each unit is connected with the inner surface of the skin, a square hole is opened on the aircraft skin on the upper side of the rectangular inner cavity near the middle of the hanger box, which serves as an insertion passage for the boarding ladder hanging point, and the semi-enclosed inner cavity formed by the hanger box and the aircraft skin serves as a space for the boarding ladder hanging point; the mounting plate is located around the hanger box and is fixedly connected to the aircraft skin; the inner reinforcement plate is located between the hanger box and the aircraft skin, and the upper end of the inner reinforcement plate is flush with the lower side of the square hole of the aircraft skin, serving as a supporting structure for the boarding ladder hanging point. The present application has a simple structure, is watertight, and is wear-resistant. Through a simple box-shaped structure and a flat plate, the hanging support function is realized, which not only ensures the sealing performance of the fuselage, but also ensures the continuity of the longitudinal load of the wall panel on the bottom of the ship.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft fuselage design, and in particular relates to a hanging point structure for a boarding ladder on the side of a seaplane fuselage. Background Art

[0002] During field test flights or missions, there is a need to board the aircraft using a regular boarding ladder. A stable hanging point for the boarding ladder must be provided at the bottom of the side door of the fuselage to ensure the safety of passengers boarding the aircraft. Summary of the invention

[0003] In order to provide a stable hanging point for a boarding ladder to be hung at the lower part of a fuselage side door, the present invention provides a seaplane fuselage side boarding ladder hanging point structure, and the technical solution is as follows:

[0004] A hanging point structure for a boarding ladder on the side of a seaplane fuselage, comprising two units, the two units are arranged at the same height forward and backward along the heading, and each unit comprises: a hanging rack box, a mounting plate and an inner reinforcement plate;

[0005] The pylon box is fitted and connected to the inner surface of the aircraft skin. A square hole is opened on the aircraft skin on the upper side of the rectangular inner cavity near the middle of the pylon box as an insertion passage for the boarding ladder hanging point. The semi-enclosed inner cavity formed by the pylon box and the aircraft skin serves as a space for the boarding ladder hanging point.

[0006] The mounting plates are located around the rack box and are fixedly connected to the aircraft skin;

[0007] The inner reinforcement plate is located between the rack box and the aircraft skin. The upper end of the inner reinforcement plate is flush with the lower side of the square hole in the aircraft skin, serving as a supporting structure for the boarding ladder hanging point.

[0008] Furthermore, an outer wear plate is provided on the outer side of the aircraft skin.

[0009] Furthermore, a support plate nut is installed on the mounting plate, and the outer anti-wear plate is fixed by the support plate nut.

[0010] Furthermore, a drainage hole is provided at the lower position of the outer anti-wear plate for draining the accumulated water in the inner cavity of the rack box.

[0011] Each unit further comprises: a longitudinal member,

[0012] The upper and lower sides of the rack box are connected to the longitudinal members.

[0013] Furthermore, a depression is provided on the longitudinal member, and the upper and lower sides of the rack box are connected to the depression.

[0014] Optionally, the size of the square hole is determined by the size of the rectangular inner cavity in the middle of the rack box.

[0015] Optionally, the mounting plate is an aluminum alloy thin plate.

[0016] Optionally, the rack box, the inner reinforcement plate and the outer wear plate are made of stainless steel.

[0017] The invention provides a seaplane fuselage side boarding ladder hanging point structure, which is simple in structure, watertight and wear-resistant, and realizes the hanging support function through a simple box-shaped structure and a flat plate, thereby ensuring both the sealing performance of the fuselage and the continuity of the longitudinal load of the wall panel on the bottom of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a structure of a boarding ladder hanging point on the side of a seaplane fuselage provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of the outer wear plate provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application is further described in detail below through specific implementation methods and drawings.

[0021] The present invention provides a seaplane fuselage side boarding ladder hanging point structure, see Figure 1 and Figure 2 The structure includes two units, which are arranged at the same height along the front and rear of the flight path. Two claws of the boarding ladder are hung on the two units. The two units include a first unit and a second unit. Figure 1 In the figure, the left side is the first unit and the right side is the second unit.

[0022] Each unit includes: a rack box 1, a mounting plate 2 and an inner reinforcement plate 3;

[0023] The rack box 1 is fitted and connected to the inner surface of the aircraft skin.

[0024] In the present invention, according to the size of the rectangular inner cavity in the middle of the pylon box 1, a square hole is opened on the aircraft skin near the upper side of the inner cavity as an insertion passage for the boarding ladder hanging point, and the semi-enclosed inner cavity formed by the pylon box 1 and the aircraft skin serves as a space for the boarding ladder hanging point.

[0025] Optionally, the rack box 1 is made of stainless steel.

[0026] The mounting plate 2 is located around the pylon box 1 and is fixedly connected to the aircraft skin. A mounting plate 2 is arranged on the top, bottom, left and right of the pylon box 1.

[0027] Optionally, the mounting plate 2 is an aluminum alloy thin plate.

[0028] The inner reinforcement plate 3 is located between the pylon box 1 and the aircraft skin, and the upper end of the inner reinforcement plate 3 is flush with the lower side of the square hole of the aircraft skin, serving as a supporting structure for the hanging point of the boarding ladder.

[0029] In addition, the inner reinforcing plate 3 can prevent the inner surface of the aircraft skin from being scratched.

[0030] Optionally, the inner reinforcement plate 3 is made of stainless steel.

[0031] For example, a countersunk high lock may be used to connect the aircraft skin, the inner reinforcement plate 3 and the pylon box 1 together.

[0032] The present invention also provides a seaplane fuselage side boarding ladder hanging point structure, see Figure 1 and Figure 2 The structure includes two units, which are arranged at the same height along the front and rear of the heading. Each unit includes: a rack box 1, a mounting plate 2, an inner reinforcement plate 3, an outer anti-wear plate 4 and a longitudinal member 5;

[0033] The rack box 1 is fitted and connected to the inner surface of the aircraft skin, and the upper and lower sides are connected to the longitudinal member 5 .

[0034] In order to ensure the strength of the hanging point structure, a depression is provided on the longitudinal member 5, and the upper and lower sides of the hanger box 1 are connected to the depression, thereby improving the supporting rigidity of the hanging point.

[0035] The longitudinal member 5 is a long stringer, and a high lock can be used to connect the aircraft skin, the pylon box 1 and the long stringer.

[0036] In the present invention, according to the size of the rectangular inner cavity in the middle of the pylon box 1, a square hole is opened on the aircraft skin near the upper side of the inner cavity as an insertion passage for the boarding ladder hanging point, and the semi-enclosed inner cavity formed by the pylon box 1 and the aircraft skin serves as a space for the boarding ladder hanging point.

[0037] The mounting plate 2 is located around the pylon box 1 and is fixedly connected to the aircraft skin. A mounting plate 2 is arranged on the top, bottom, left and right of the pylon box 1.

[0038] The inner reinforcement plate 3 is located between the pylon box 1 and the aircraft skin, and the upper end of the inner reinforcement plate 3 is flush with the lower side of the square hole of the aircraft skin, serving as a supporting structure for the hanging point of the boarding ladder.

[0039] Furthermore, in order to prevent the boarding ladder from scratching the outer surface of the aircraft skin, an outer wear plate 4 is provided on the outer side of the aircraft skin. The outer wear plate 4 is attached to the outer side of the aircraft skin, and a certain amount of support plate nuts are installed on the mounting plate 2, and the outer wear plate 4 is fixed by the support plate nuts. The outer wear plate 4 is detachable.

[0040] Furthermore, a drainage hole is provided at the lower position of the outer anti-wear plate 4, through which the accumulated water in the inner cavity of the rack box 1 can be ensured to be drained smoothly.

[0041] Optionally, the outer anti-wear plate 4 is made of stainless steel.

[0042] The invention provides a seaplane fuselage side boarding ladder hanging point structure, which is simple in structure, watertight and wear-resistant, and realizes the hanging support function through a simple box-shaped structure and a flat plate, thereby ensuring both the sealing performance of the fuselage and the continuity of the longitudinal load of the wall panel on the bottom of the ship.

[0043] The above only expresses the implementation methods of the present application, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A seaplane fuselage side boarding ladder hanging point structure, characterized in that: It includes two units, which are arranged at the same height along the front and rear of the heading. Each unit includes: a rack box, a mounting plate and an inner reinforcement plate; The pylon box is fitted and connected to the inner surface of the aircraft skin. A square hole is opened on the aircraft skin on the upper side of the rectangular inner cavity near the middle of the pylon box as an insertion passage for the boarding ladder hanging point. The semi-enclosed inner cavity formed by the pylon box and the aircraft skin serves as a space for the boarding ladder hanging point. The mounting plates are located around the rack box and are fixedly connected to the aircraft skin; The inner reinforcement plate is located between the rack box and the aircraft skin. The upper end of the inner reinforcement plate is flush with the lower side of the square hole in the aircraft skin, serving as a supporting structure for the boarding ladder hanging point.

2. The seaplane fuselage side boarding ladder hanging point structure according to claim 1, characterized in that: An external wear plate is provided on the outside of the aircraft skin.

3. The seaplane fuselage side boarding ladder hanging point structure according to claim 2, characterized in that: A support plate nut is installed on the mounting plate, and the outer anti-wear plate is fixed by the support plate nut.

4. The seaplane fuselage side boarding ladder hanging point structure according to claim 2 or 3, characterized in that: A drainage hole is arranged at the lower position of the outer anti-wear plate to drain the accumulated water in the inner cavity of the rack box.

5. The seaplane fuselage side boarding ladder hanging point structure according to claim 1, characterized in that: Each unit also includes: a longitudinal member, The upper and lower sides of the rack box are connected to the longitudinal members.

6. The seaplane fuselage side boarding ladder hanging point structure according to claim 5, characterized in that: The longitudinal member is provided with a depression, and the upper and lower sides of the hanger box are connected to the depression.

7. The seaplane fuselage side boarding ladder hanging point structure according to claim 1, characterized in that: The size of the square hole is determined by the size of the rectangular inner cavity in the middle of the rack box.

8. The seaplane fuselage side boarding ladder hanging point structure according to claim 1, characterized in that: The mounting plate is made of aluminum alloy sheet.

9. The seaplane fuselage side boarding ladder hanging point structure according to claim 2, characterized in that: The rack box, inner reinforcement plate and outer wear plate are made of stainless steel.

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