Multipurpose detachable aircraft floor structure

Abstract

The invention belongs to the technical field of aircraft structure design, and discloses a multipurpose detachable aircraft floor structure which is composed of a rectangular double-ground-rail type blocking plate, two Z-shaped supports, a floor, three L-shaped supporting pieces, a stop ground rail, four limiting bolts and eight limiting blocks. The structure solves the problems that when configuration transformation is conducted on the top structure of the large opening of the fuselage, the number of related components is large, installation is tedious, and function compatibility is not high, the structure integration degree is high, connection is reliable, the adaptation degree is good, and the time needed for aircraft configuration reloading is greatly shortened compared with the time needed for aircraft configuration reloading in an existing structure form.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft structure design, and in particular relates to a multi-purpose detachable aircraft floor structure. Background Art

[0002] Special aircraft usually need to have many functions in different fields such as fire fighting, search / rescue, personnel / material transportation, etc. The configuration of the large opening top structure of the fuselage is transformed to meet the diverse needs of aircraft functions.

[0003] In order to adapt to the functions of aircraft in different fields, in the past, when the configuration of the large opening top structure of the fuselage was changed, due to the limitations of manufacturing, technical level and component integration, there were problems such as a large number of components involved in the configuration change, cumbersome installation, and low functional compatibility. Generally, a single function was realized by several components, the functional integration of components was not high, the installation / disassembly process was cumbersome, and the working cycle during configuration conversion was long, which greatly increased the cost of aircraft component manufacturing and subsequent use and maintenance. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems of a large number of components, complicated installation and poor functional compatibility when the configuration of the large opening top structure of the fuselage is changed, and to provide a multi-purpose detachable aircraft floor structure.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A multi-purpose detachable aircraft floor structure comprises: a rectangular double-ground-rail blocking plate, a Z-shaped support, a floor, an L-shaped support, a stop ground rail, a limit bolt and a limit block.

[0007] The upper part of the double-track plugging plate and the upper part of the stopper track are the upper surface of the aircraft floor structure, and the lower part of the double-track plugging plate and the lower part of the stopper track are the lower docking surface connected to the large opening of the aircraft; the double-track plugging plate and the Z-shaped support are connected to the large opening structure of the fuselage, the stopper track is connected to the fuselage transfer beam, and the double-track plugging plate and the stopper track provide an installation plane for the L-shaped support and the floor; the double-track plugging plate is arranged with a special-shaped stopper track groove and a stopper track groove, and the stopper track is arranged on the stopper track There are stop ground rail grooves, which together constitute a multi-purpose ground rail structure; the stop ground rail groove structure is highly symmetrical, the groove opening is a staggered structure of circular arcs and straight line segments, the special-shaped stop ground rail groove is along the center line of the bus, and the left and right sides of the groove are asymmetrical structures; a vertical rib structure is arranged between the upper and lower surfaces of the stop ground rail, and a "J"-shaped lug is arranged on the lower surface to connect with the ground rail beam; the stop ground rail and the ground rail beam are connected and limited by the cooperation of four groups of limit bolts and limit blocks, each group has one limit bolt and two limit blocks.

[0008] As a further solution of the present invention: the upper surface of the double ground rail type blocking plate and the upper surface of the stop ground rail are in the same horizontal plane, both are connected to the functional device of the aircraft, and the lower surface of the double ground rail type blocking plate and the lower surface of the stop ground rail are respectively connected to the top of the large opening structure frame of the fuselage and the top of the transfer beam.

[0009] As a further solution of the present invention: the mesh rib structure around the lower surface of the double ground rail type blocking plate is airtightly connected to the top of the fuselage large opening structure frame, the upper surface of the Z-shaped support is airtightly connected to the lower surface of the double ground rail type blocking plate, and the lower surface of the Z-shaped support is connected to the fuselage large opening structure; the "J"-shaped support ears arranged longitudinally along the lower surface of the stopping ground rail are connected to the fuselage transfer beam; the respective extending ends of the opposite surfaces of the double ground rail type blocking plate and the stopping ground rail provide installation planes for the floor and the L-shaped support member.

[0010] As a further solution of the present invention: the double ground rail type blocking plate provides a special-shaped stopping ground rail groove and a stopping ground rail groove, and the stopping ground rail provides a stopping ground rail groove. The distribution spacing of the above-mentioned ground rail grooves is L=365~440mm and together constitute a multi-purpose ground rail structure.

[0011] As a further solution of the present invention: the upper part of the double ground rail type blocking plate is arranged with a stopping ground rail groove and a special-shaped stopping ground rail groove with a spacing of L=440mm, and the groove openings are symmetrical structures along the cross-section; the opening shape of the special-shaped stopping ground rail groove on the upper surface is a semicircular opening with a diameter of 11mm evenly distributed along one side of the center line, the opening spacing is L=30mm, and the openings are equal straight sections. The opening shape of the special-shaped stopping ground rail groove on the upper surface is a semicircular opening with a diameter of 11mm arranged at unequal intervals and staggered along the other side of the center line, and a U-shaped opening with a longitudinal dimension of 47mm, a transverse dimension of 4mm, and a fillet radius of 11mm. The U-shaped opening distribution can be adjusted to a spacing of L=60~270mm.

[0012] As a further solution of the present invention: the upper part of the stopping ground rail is its upper surface, and the bottom is its lower surface, a transverse vertical rib structure is arranged between the upper surface and the lower surface of the stopping ground rail, a stopping ground rail groove is arranged on the upper surface of the stopping ground rail, and a "J"-shaped lug is arranged on the lower surface of the stopping ground rail, and the "J"-shaped lug is distributed at a spacing of L=360~400mm, and a vertical rib structure is arranged between the bottom of the stopping ground rail groove and the lower surface of the stopping ground rail, and the vertical rib structure is distributed at a spacing of L=380~410mm along the longitudinal direction.

[0013] As a further solution of the present invention: a limiting bolt and two limiting blocks are arranged at the "J"-shaped support ear of the stopping ground rail, which are connected to the ground rail beam for limiting; the head of the limiting bolt is in a "dumbbell shape", and the arc area shrinks in a step-like manner from the end face of the head longitudinally, the arc radius R=11.5mm, and the width of the equal straight area L=13; the limiting block has an outer shape of a "solar eclipse shape", with a notch radius of R=11mm, and its notch part cooperates with the arc part of the bolt head of the anchor bolt to jointly play a limiting role; during installation, the rod of the limiting bolt passes through the "J"-shaped support ear of the stopping ground rail, a limiting bolt head and two limiting blocks are placed in the groove cavity of the ground rail beam, and the outer contours of the two limiting blocks fit and limit the arc structure of the groove cavity of the ground rail beam.

[0014] The beneficial effects of this application are:

[0015] 1. The present application can be used at large openings of aircraft fuselages. The lower parts of the double-ground-rail plugging plates and the stopper ground rails are arranged with mesh ribs and triangular rib structures, which can effectively improve the structural strength of parts at large openings and meet the strength and stiffness requirements of large fuselage openings. The double-ground-rail plugging plates and the "J"-shaped ear structure at the lower part of the stopper ground rail are connected to the top of the fuselage large opening structure frame and the top of the transfer beam through bolts, limit bolts, and limit blocks, respectively. The connection structure is stable and reliable. The double-ground-rail plugging plates and the stopper ground rails can meet the requirements of structural strength and rigidity. Quick connection and airtightness with the large opening structure of the fuselage; the stopping ground rail groove on the upper part of the double ground rail type blocking plate, the special-shaped stopping ground rail groove and the stopping ground rail groove on the upper part of the stopping ground rail together constitute a multi-purpose ground rail structure, which can meet the needs of quick connection between the fuselage and various functional devices, greatly shorten the time required for aircraft configuration conversion, and reduce the user's production / operating costs; the multi-purpose detachable aircraft floor structure of the present invention has high structural integration, reliable connection, good adaptability, and the time required for aircraft configuration replacement is greatly reduced compared with previous structural forms.

[0016] 2. The double ground rail blocking plate, stopper and floor of the present application are in the same plane, which can meet the rapid installation needs of functional devices of different users in many fields; at the same time, it can meet the strength and airtightness requirements of large opening structures of aircraft.

[0017] 3. The lower surface of the double-ground-rail plugging plate and the lower surface of the Z-shaped support of the present application are airtightly connected to the top of the large opening structure of the fuselage, and the "J"-shaped support ear on the lower surface of the stopping ground rail is connected to the fuselage transfer beam; the respective extended ends of the opposite surfaces of the double-ground-rail plugging plate and the stopping ground rail provide installation planes for the floor and the L-shaped support member. The structural form has a clear connection surface, high structural stability, and can achieve quick disassembly / installation, saving production / working costs.

[0018] 4. The multi-purpose ground rail structure of the present application, which is composed of a double ground rail type blocking plate, a special-shaped stopping ground rail groove provided by the stopping ground rail, and a distribution spacing L=365~440mm, can quickly realize the aircraft configuration change and meet many functions in different fields of the aircraft.

[0019] 5. The upper part of the double ground rail type blocking plate of the present application is arranged with a stop ground rail groove and a special-shaped stop ground rail groove with a spacing of L=440mm, and the groove openings are symmetrical structures along the cross-section; the groove openings of the special-shaped stop ground rail groove are arranged with a U-shaped opening with a spacing of L=60~270mm, instead of a semicircular opening. This design makes the aircraft adaptable to a wider range when the configuration is changed, and increases the functional diversity of the aircraft.

[0020] 6. The upper surface of the stop rail of the present application is provided with a stop rail groove, the lower surface is provided with a "J"-shaped lug, and a transverse rib structure is arranged between the upper and lower surfaces, which together increase the strength and rigidity of the stop rail. The upper part is the upper surface, and the bottom is the lower surface. A transverse rib structure is arranged between the upper and lower surfaces of the stop rail. The stop rail and the "J"-shaped lug of the stop rail are distributed at a spacing of L = 360 to 400 mm. The stop rail is provided with a rib structure between the bottom of the stop rail groove and the lower surface, and the rib structure is distributed at a spacing of L = 380 to 410 mm in the longitudinal direction.

[0021] 7. In the present application, a limiting bolt and two limiting blocks are arranged at the I-shaped support ear on the lower surface of the stopping ground rail. The stepped "dumbbell-shaped" head of the limiting bolt and the eclipse-shaped limiting block are placed in the groove cavity of the ground rail beam. The outer contours of the two limiting blocks fit and limit the arc structure of the groove cavity of the ground rail beam. This structure can effectively connect and limit the stopping ground rail and improve the structural stability.

[0022] The present application is further described in detail below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the multi-purpose detachable aircraft floor structure of the present invention;

[0024] Figure 2 This is a cross-sectional view of the multi-purpose detachable aircraft floor structure of the present invention;

[0025] Figure 3 This is a three-dimensional diagram of the multi-purpose detachable aircraft floor structure of the present invention.

[0026] Explanation of numbers in the figure: 1. Double ground rail blocking plate; 2. Z-shaped support; 3. Floor; 4. L-shaped support member; 5. Stop ground rail; 6. Limit bolt; 7. Limit block; 8. Upper surface of double ground rail blocking plate / stop ground rail; 9. Lower surface of double ground rail blocking plate; 10. Stop ground rail groove; 11. Special-shaped stop ground rail groove; 12. Lower surface of stop ground rail; 13. "J"-shaped support ear; 14. Vertical rib structure. DETAILED DESCRIPTION

[0027] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments.

[0028] See also Figure 1 , Figure 2 , Figure 3 , the front view, sectional view and stereoscopic view of the multi-purpose detachable aircraft floor structure, the multi-purpose detachable aircraft floor structure of the present invention comprises a rectangular double ground rail plugging plate 1, two Z-shaped supports 2, a floor 3, three L-shaped support members 4, a stop ground rail 5, four limit bolts 6, and eight limit blocks 7. The double ground rail plugging plate 1 comprises an upper surface 8, a lower surface 9, a stop ground rail groove 10, a special-shaped stop ground rail groove 11, and a mesh vertical rib 12. The lower surface 9 of the double ground rail plugging plate 1 has a high processing accuracy requirement and fits with the upper surface of the top opening frame of the aircraft's large opening structure; the upper surface 8 of the double ground rail plugging plate 1 fits with the functional device in the aircraft body, and the processing accuracy requirement is relatively low; the upper part of the double ground rail plugging plate 1 is arranged with a stop ground rail groove 10 and a special-shaped stop ground rail groove 11. The stopper ground rail 5 has an upper surface 8, a lower surface 12, a stopper ground rail groove 10, an "X"-shaped ear piece 13, and a vertical rib structure 14; the stopper ground rail 5 is arranged with a stopper ground rail groove 10 on the upper surface, and the lower surface 12 of the stopper ground rail 5 is evenly distributed along the heading direction by four "X"-shaped ear pieces 13 for connecting with the ground rail beam through limit bolts 6 and limit blocks 7. The extended ends of the opposite surfaces of the double ground rail type plug plate 1 and the stopper ground rail 5 provide installation platforms for the L-shaped support member 4 and the floor 3. The two stopper ground rail grooves 10 and the special-shaped stopper ground rail groove 11 provided by the double ground rail type plug plate 1 and the stopper ground rail 5 provide installation interfaces for functional devices in the aircraft body, and the notches of the special-shaped stopper ground rail groove 11 are composed of semicircular openings and U-shaped openings.

[0029] A multi-purpose detachable aircraft floor structure, and a connection method thereof:

[0030] The multi-purpose detachable aircraft floor structure comprises a rectangular double-ground rail plugging plate 1, two Z-shaped supports 2, a floor 3, three L-shaped supports 4, a stop ground rail 5, four limit bolts 6, and eight limit blocks 7. The lower surface 9 of the double-ground rail plugging plate 1 fits with the top plane of the aircraft's large frame structure and the sealing belt, so the lower surface 9 of the double-ground rail plugging plate 1 has higher requirements for processing accuracy and flatness; the upper surface 8 of the double-ground rail plugging plate 1 fits with the functional devices in the aircraft body, so the upper surface 8 of the double-ground rail plugging plate 1 has lower requirements for processing accuracy and flatness; the upper part of the ground rail plugging plate 1 is arranged with a stop ground rail groove 10 and a special-shaped stop ground rail groove 11. The special-shaped stop ground rail groove is arranged on the side of the part close to the symmetry center line of the aircraft, and the ground rail groove is arranged on the side of the part close to the symmetry center line of the aircraft. The rail distribution spacing L=440mm; the opening shape of the special-shaped stop rail groove on the upper surface is a semicircular opening with a diameter of 11mm evenly distributed along one side of the center line, the opening spacing L=30mm, and the openings are equal straight sections. The opening shape of the special-shaped stop rail groove on the upper surface is a semicircular opening with a diameter of 11mm arranged at unequal intervals and staggered along the other side of the center line, and a U-shaped opening with a longitudinal dimension of 47mm, a transverse dimension of 4mm, and a fillet radius of 11mm. The U-shaped opening distribution has an adjustable spacing of L=60~270mm. The upper surface 8 of the stopper ground rail 5 is arranged with a stopper ground rail groove 10, and the upper surface 8 of the stopper ground rail 5 is in contact with the functional device in the aircraft body, so the processing accuracy and flatness requirements thereof are relatively low; the connection between the lower surface 12 of the stopper ground rail and the ground rail beam belongs to the inside of the body, so the processing accuracy and flatness requirements of the lower surface 12 of the stopper ground rail are also relatively low; the lower surface 12 of the stopper ground rail 5 is arranged with a "J"-shaped ear piece 13, and the distribution spacing of the "J"-shaped ear pieces is L=360~400mm, and a vertical rib structure 14 is arranged between the bottom of the stopper ground rail groove 10 and the lower surface 12, and the vertical rib structure 14 is distributed at a spacing of L=380~410mm in the longitudinal direction, and the vertical rib structure 14 enhances the strength and rigidity of the stopper ground rail. The "X"-shaped ear piece 13 on the stop ground rail 5 is connected and limited with the aircraft ground rail beam through a limiting bolt and a limiting block. The head of the limiting bolt matches the arc-shaped notch of the limiting block and is arranged in the arc-shaped groove cavity of the ground rail beam. The outer shape of the two limiting blocks fits and limits the arc-shaped structure of the groove cavity of the ground rail beam.

[0031] The present invention is used at large openings of an aircraft body. The lower parts of the double ground rail type plugging plate and the stop ground rail are arranged with mesh ribs and triangular rib structures, which effectively improve the structural strength of the double ground rail type plugging plate and the stop ground rail and meet the strength and rigidity requirements of the large opening of the fuselage. The circumference of the double ground rail type plugging plate and the "J"-shaped ear piece structure at the lower part of the stop ground rail are respectively connected to the top of the fuselage large opening structure frame and the top of the transfer beam through bolts, limit bolts and limit blocks. The connection structure is stable, reliable and fast. The stop ground rail groove at the upper part of the double ground rail type plugging plate, the special-shaped stop ground rail groove and the stop ground rail groove at the upper part of the stop ground rail together constitute a multi-purpose ground rail structure, which meets the requirements for rapid connection between the body structure and various functional devices, greatly shortens the time required for aircraft configuration conversion, and reduces the production / operating costs of users. The multi-purpose detachable aircraft floor structure has high structural integration, reliable connection and good adaptability.

[0032] So far, the purpose of the present invention has been achieved.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-purpose detachable aircraft floor structure, characterized in that: It is composed of a rectangular double-ground rail blocking plate (1), two Z-shaped supports (2), a floor (3), three L-shaped support members (4), a stop ground rail (5), four limit bolts (6), and eight limit blocks (7); The upper part of the double-track plugging plate (1) and the upper part of the stopper track (5) are the upper surface of the aircraft floor structure, and the lower part of the double-track plugging plate (1) and the lower part of the stopper track (5) are the lower docking surface connected to the large opening of the aircraft; the double-track plugging plate (1) and the Z-shaped support (2) are connected to the large opening structure of the fuselage, the stopper track (5) is connected to the fuselage transfer beam, and the double-track plugging plate (1) and the stopper track (5) provide an installation plane for the L-shaped support member (4) and the floor (3); the double-track plugging plate (1) is provided with a special-shaped stopper track groove and a stopper track groove. The stop ground rail (5) is provided with a stop ground rail groove, which together form a multi-purpose ground rail structure; the stop ground rail groove structure is highly symmetrical, and the groove opening is a staggered structure of circular arcs and straight line segments; the special-shaped stop ground rail groove is along the center line of the bus, and the left and right sides of the groove opening are asymmetrical structures; a vertical rib structure is arranged between the upper and lower surfaces of the stop ground rail (5), and a "J"-shaped support ear is arranged on the lower surface to connect with the ground rail beam; the stop ground rail (5) and the ground rail beam are connected and limited by the cooperation of four groups of limit bolts (6) and limit blocks (7), and each group has one limit bolt (6) and two limit blocks (7).

2. The multi-purpose detachable aircraft floor structure according to claim 1, characterized in that: The upper surfaces (8) of the double ground rail type blocking plate (1) and the stop ground rail (5) are on the same horizontal plane and are both connected to the functional devices of the aircraft. The lower surface (9) of the double ground rail type blocking plate (1) and the lower surface (12) of the stop ground rail (5) are respectively connected to the top of the large opening structure frame of the fuselage and the top of the transfer beam.

3. The multi-purpose detachable aircraft floor structure according to claim 2, characterized in that: The mesh rib structure (12) around the lower surface (9) of the double ground rail type blocking plate (1) is airtightly connected to the top of the frame of the large opening structure of the fuselage; the upper surface of the Z-shaped support (2) is airtightly connected to the lower surface of the double ground rail type blocking plate (1), and the lower surface of the Z-shaped support (2) is connected to the large opening structure of the fuselage; the "J"-shaped support ears (13) longitudinally arranged along the lower surface (12) of the stop ground rail (5) are connected to the fuselage transfer beam; the respective extended ends of the opposite surfaces of the double ground rail type blocking plate (1) and the stop ground rail (5) provide installation structures for the floor (3) and the support member (4).

4. The multi-purpose detachable aircraft floor structure according to claim 3, characterized in that: The double ground rail type blocking plate (1) provides a special-shaped stopping ground rail groove (11) and a stopping ground rail groove (10), and the stopping ground rail (5) provides a stopping ground rail groove (10). The distribution spacing of the above-mentioned ground rail grooves is L=365-440mm and together constitute a multi-purpose ground rail structure.

5. The multi-purpose detachable aircraft floor structure according to claim 4, characterized in that: The double ground rail type blocking plate (1) is provided with a stop ground rail groove (10) and a special-shaped stop ground rail groove (11) at a spacing of L=440 mm on the upper part, and the groove openings are symmetrical structures along the cross section; the opening shape of the special-shaped stop ground rail groove (11) on the upper surface (8) is a semicircular opening with a diameter of 11 mm uniformly distributed along one side of the center line, the opening spacing L=30 mm, and the openings are equal straight sections; the opening shape of the special-shaped stop ground rail groove (11) on the upper surface (8) is a semicircular opening with a diameter of 11 mm staggered and arranged at unequal intervals on the other side of the center line, and a U-shaped opening with a longitudinal dimension of 47 mm, a transverse dimension of 4 mm, and a fillet radius of 11 mm, and the U-shaped opening distribution can be adjusted to a spacing of L=60 to 270 mm.

6. The multi-purpose detachable aircraft floor structure according to claim 5, characterized in that: The upper part of the stop ground rail (5) is its upper surface (8), and the bottom is its lower surface (12). The upper surface (8) of the stop ground rail (5) is arranged with a stop ground rail groove (10), and the lower surface (12) of the stop ground rail (5) is arranged with a "J"-shaped support ear (13). The "J"-shaped support ear (13) is distributed at a spacing of L=360-400 mm. The stop ground rail (5) is arranged with a vertical rib structure (14) between the bottom of the stop ground rail groove (10) and the lower surface (12). The vertical rib structure (14) is distributed at a spacing of L=380-410 mm in the longitudinal direction.

7. The multi-purpose detachable aircraft floor structure according to claim 6, characterized in that: The stop ground rail (5) is provided with a limiting bolt (6) and two limiting blocks (7) connected to the ground rail beam at the "J"-shaped support ear (13); the rod of the limiting bolt (6) passes through the "J"-shaped support ear (13) of the stop ground rail (5); the head of the limiting bolt (6) matches the arc-shaped notch of the limiting block (7) and is arranged in the groove cavity of the ground rail beam; the outer shapes of the two limiting blocks (7) are fitted with the arc-shaped structure of the groove cavity of the ground rail beam to limit the position.

8. The multi-purpose detachable aircraft floor structure according to claim 7, characterized in that: The head of the limiting bolt (6) is in a "dumbbell shape", the arc region shrinks in a step-like manner from the end face of the head of the limiting bolt (6) in the longitudinal direction, the arc radius R=11.5mm, and the width of the equal straight region L=13; the outer shape of the limiting block is in a "solar eclipse shape", the outer radius R=10.5mm, the arc notch radius R=11mm, and the arc notch cooperates with the bolt head of the limiting bolt to play a limiting role.

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