Lock hook connecting device

Abstract

A lock hook connecting device comprises a lock hook base which comprises a base plate and a protruding part, a tooth part is arranged on the lower surface, facing a tooth-shaped plate, of the base plate, and base through holes penetrating in the circumferential direction are formed in the positions, close to the four corners, of the base plate correspondingly so that connecting bolts can penetrate through the base through holes; the difference between the radius of the connecting bolt and the hole radius of the base through hole is a specified value, the protruding part is formed in the mode that the protruding part protrudes upwards from the base plate to the annular direction, and a through hole penetrating in the heading direction is formed in the position, close to the upper portion of the annular direction, of the protruding part so that the door lock rod can be inserted. The door lock rod is used for hooking a lock hook of the cabin door; a tooth-shaped part is arranged on the upper surface, facing the base plate, of the tooth-shaped plate, and a bolt mounting hole is formed in the position, corresponding to the base through hole, of the tooth-shaped plate; the connecting bolt penetrates through the base through hole and the bolt mounting hole to fasten the lock hook base and the tooth-shaped plate relative to the machine body main structure, the lock hook base and the tooth-shaped plate are matched through tooth meshing, and the radial position is adjusted by changing the meshing position.

Description

Technical Field

[0001] The invention relates to a lock hook connecting device, which is used for connecting a lock hook of a cabin door and a main body structure of a fuselage. Background Art

[0002] Converting a civil passenger aircraft into a cargo aircraft (hereinafter referred to as "passenger-to-cargo") is an important means to give full play to the residual value of the aircraft and expand the business scope of the airline. There are two main points to convert a passenger aircraft into a cargo aircraft. One is to adjust the layout in the cabin, and the other is to add a main cabin door. The main cargo door of the cargo aircraft is connected to the lock hook base on the fuselage through the lock hook at the bottom to realize the opening and closing of the main cargo door. When installing the main cargo door, due to the accumulation of tolerances in the manufacture and assembly of parts, it is necessary to adjust the position of the lock hook base installed in the opening of the main cargo door of the fuselage to ensure that the installation of the main cargo door meets the design requirements. The conventional lock hook base is a fixed installation form and cannot be adjusted without disassembly. Therefore, an adjustable lock hook connection device is needed, which can adjust the installation position of the lock hook base without disassembly, so as to improve the assembly efficiency and matching accuracy of the main cargo door and save time and labor costs.

[0003] In the past, as an adjustable lock hook connection device, there is a known aircraft cabin door lock hook structure design, which adopts a toothed plate structure to achieve adjustment of the lock hook base. However, the toothed plate structure cannot achieve three-way adjustment of the lock hook installation position. Therefore, there is still room for improvement.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent document 1: CN213330423U

[0007] Patent document 2: CN218715860U Summary of the invention

[0008] The present invention is made to solve the above technical problems, and its purpose is to provide a locking hook connecting device, which can realize the adjustment of the locking hook connecting device in the circumferential direction, the azimuth direction and the radial direction, and can withstand a larger load.

[0009] The first embodiment of the present invention relates to a lock hook connecting device, comprising: a lock hook base, the lock hook base comprising a base plate and a protrusion, a tooth portion is arranged on the lower surface of the base plate facing the toothed plate, and base through holes penetrating along the annular direction are respectively arranged at positions close to the four corners of the base plate, the base through holes are for connecting bolts to pass through, the radius of the connecting bolts differs from the hole radius of the base through holes by a specified value, the protrusion is formed in a manner of protruding from the base plate to the annular upper side, and a through hole penetrating along the course direction is formed at a position close to the annular upper part of the protrusion. A through hole, wherein a door lock rod is inserted therein; a door lock rod, wherein the door lock rod is hooked by a lock hook of a cabin door; a toothed plate, wherein a toothed portion is arranged on the upper surface of the toothed plate facing the base plate, and a bolt mounting hole is arranged at a position of the toothed plate corresponding to the base through hole; a connecting bolt, wherein the connecting bolt passes through the base through hole and the bolt mounting hole to fasten the lock hook base and the toothed plate relative to the main structure of the fuselage, the lock hook base and the toothed plate are engaged with each other through teeth, and the radial position of the lock hook base is adjusted by changing the engagement position.

[0010] According to the lock hook connection device of the above structure, the radius of the connecting bolt differs from the hole radius of the base through hole by a specified value, the lock hook base and the toothed plate are engaged with each other through teeth, and the radial position of the lock hook base can be adjusted by changing the engagement position.

[0011] Ideally, the lock hook connecting device also includes an adjusting screw, an elongated through hole penetrating along the heading is provided inside the base plate, a convex shaft is provided on the upper surface of the toothed plate facing the base plate, the convex shaft is formed in a manner of protruding upward in an annular direction from the upper surface of the toothed plate, a threaded hole is formed on the convex shaft, the threaded hole is used to cooperate with the thread of the adjusting screw, a groove is formed at a position of the base plate corresponding to the convex shaft of the toothed plate, the imaginary circle radius of the convex shaft differs from the hole radius of the groove by a specified value, and the lock hook base is moved along the heading by rotating the adjusting screw.

[0012] According to the lock hook connection device of the above structure, the adjusting screw is threadedly matched with the threaded hole of the convex shaft of the toothed plate. By rotating the adjusting screw, the lock hook base can be moved along the heading, thereby realizing the position adjustment of the lock hook base in the heading.

[0013] In addition, at least one gasket is included, and the gasket is sandwiched between the toothed plate and the main structure of the fuselage.

[0014] According to the locking hook connection device of the above structure, the locking hook connection device can be adjusted in the circumferential direction of the fuselage by changing the number or thickness of the gaskets.

[0015] More ideally, it also includes a support anti-wear plate, and the lock hook base also includes an anti-wear plate mounting portion, which is arranged at a position between two base through holes in the direction of the base plate in a manner of protruding upward in an annular manner from the base plate, and the anti-wear plate mounting portion is used for the support anti-wear plate to be installed thereon.

[0016] According to the lock hook connection device of the above structure, by providing the support anti-wear sheet, the lock hook of the hatch door can be prevented from contacting with the lock hook base, causing wear of the lock hook base. In addition, when the support anti-wear sheet is worn, it is sufficient to replace the support anti-wear sheet, which can not only ensure reliability but also reduce costs.

[0017] Preferably, the tooth portion is located in a region of the lower surface of the base plate avoiding the groove in the radial direction, and the tooth-shaped portion is arranged at positions on both sides of the convex shaft in the radial direction.

[0018] In addition, a recessed portion is provided on the surface of the base plate corresponding to the adjusting screw in the direction, and the recessed depth in the direction of the recessed portion is set so that when the adjusting screw is fully screwed in, the screw head of the adjusting screw can be accommodated in the recessed portion, and the through hole is provided in the recessed portion.

[0019] Furthermore, the toothed portion is formed with a plurality of corrugated teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 and 2 are perspective views showing the structure of a lock hook connection device according to an embodiment of the present invention, wherein (a) shows an assembled state and (b) shows a disassembled state.

[0021] Figure 2 It is an exploded perspective view showing the structure of the lock hook connection device according to the embodiment of the present invention.

[0022] Figure 3 It is a perspective view showing the structure of a hook connection device according to an embodiment of the present invention.

[0023] Figure 4 1 is a diagram showing the assembly relationship between a lock hook base and a connection bolt of a lock hook connection device according to an embodiment of the present invention.

[0024] (Explanation of symbols)

[0025] 1 Lock hook base

[0026] 2 door lock lever

[0027] 3-seat wear plate

[0028] 4 Connecting bolts

[0029] 5 Washers

[0030] 6 Toothed Plate

[0031] 7. Gasket

[0032] 8 Adjusting screw

[0033] 10 base plate

[0034] 11 Base through hole

[0035] 12 grooves

[0036] 13 teeth

[0037] 14 Long round through hole

[0038] 15 recessed portion

[0039] 20 protrusion

[0040] 30 Anti-wear pad installation part

[0041] 31 Insertion hole

[0042] 61 cam shaft

[0043] 62 toothed part

[0044] 63 threaded holes

[0045] 64 bolt mounting holes

[0046] 71 holes DETAILED DESCRIPTION

[0047] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In each figure, the same symbols are marked for the same components, and repeated descriptions are sometimes omitted. In addition, in each figure, in order to facilitate the understanding of the content of the present invention, the size and shape are sometimes partially exaggerated. In addition, in the following specific description, directional terms such as "upper", "lower", "inner", "outer", "vertical", "horizontal" and the like are used for illustrative purposes and are not restrictive.

[0048] First, refer to Figures 1 to 4 The structure of the locking hook connecting device according to the embodiment of the present invention is described. Figure 1 1 is a perspective view showing the structure of a lock hook connection device according to an embodiment of the present invention, wherein (a) shows an assembled state and (b) shows a disassembled state. Figure 1 (a) shows the heading, radial and circumferential directions with the lock hook connection device installed on the fuselage, where the heading indicates the aircraft's flying direction, the radial direction indicates the aircraft's left and right direction, and the circumferential direction indicates the aircraft's up and down direction.

[0049] like Figure 1 , Figure 2As shown, the lock hook connecting device mainly includes a lock hook base 1, a door lock rod 2, a support anti-wear plate 3, a connecting bolt 4, a washer 5, a toothed plate 6, a gasket 7 and an adjusting screw 8.

[0050] Regarding the lock hook base 1, Figure 3 As shown, it mainly includes a base plate 10, a protrusion 20 and an anti-wear plate mounting portion 30. The base plate 10 is formed into a substantially rectangular plate shape, and a base through hole 11 penetrating along the circumferential direction is respectively provided on the base plate 10 near the four corners, and the base through hole 11 is passed through by the connecting bolt 4. Figure 4 As shown, the radius of the connecting bolt 4 differs from the hole radius of the base through hole 11 by d. In addition, a recessed portion 15 is provided on the surface of the base plate 10 corresponding to the adjusting screw 8 in the direction. The recessed depth of the recessed portion 15 in the direction is set so that the screw head of the adjusting screw 8 can be accommodated in the recessed portion 15 when the adjusting screw 8 is fully screwed in.

[0051] In addition, an oblong through hole 14 is provided in the recessed portion 15 of the base plate 10, which penetrates along the course. The oblong through hole 14 is passed through by the adjustment screw 8 described later. The long axis radius of the oblong through hole 14 is equal to the sum of the radius of the adjustment screw 8 and d. In addition, a groove 12 is formed at a position of the base plate 10 corresponding to the convex shaft 61 of the toothed plate 6. As an example, a circular groove is illustrated here, but it is not limited to this, as long as it can cooperate with the convex shaft 61. A tooth portion 13 is also provided on the lower surface of the base plate 10. The tooth portion 13 is located in the area of ​​the lower surface of the base plate 10 avoiding the groove 12 in the radial direction.

[0052] The protrusion 20 is formed to protrude circumferentially upward from the base plate 10 , and a through hole (not shown) penetrating along the course is formed near the circumferential upper portion of the protrusion 20 , and the door lock rod 2 is inserted into the through hole.

[0053] The anti-wear sheet installation part 30 is arranged at a position between two base through holes 11 in the heading direction of the base plate 10, and is formed in a manner of protruding upward from the base plate 10 in a circular manner. The anti-wear sheet installation part 30 is provided for the support anti-wear sheet 3 to be installed thereon. In addition, an insertion hole 31 is also provided at a position of the anti-wear sheet installation part 30 corresponding to the through hole of the protrusion 20, and the insertion hole 31 is provided for the door lock rod 2 to be inserted. By providing the support anti-wear sheet 3, the lock hook of the cabin door can be prevented from contacting with the lock hook base 1, causing the lock hook base 1 to wear. In the case that the support anti-wear sheet 3 is worn, it is sufficient to replace the support anti-wear sheet 3, which can not only ensure reliability but also reduce costs.

[0054] The toothed plate 6 is formed into a shape roughly corresponding to the base plate 10. A protruding shaft 61 is provided on the upper surface of the toothed plate 6 facing the base plate 10, and toothed portions 62 are provided at positions on both sides of the radial direction sandwiching the protruding shaft 61. Figure 3As shown in the enlarged view of the A part in the figure, the toothed portion 62 is formed with a plurality of corrugated teeth. As an example, the circumferential shape of the protruding shaft 61 is a racetrack shape, and the protruding shaft 61 is formed in a manner of protruding upward in the circumferential direction from the upper surface of the toothed plate 6, and the imaginary circle radius of the protruding shaft 61 differs from the hole radius of the groove 12 by d. A threaded hole 63 is formed at a position approximately in the circumferential and radial directions of the protruding shaft 61, and the threaded hole 63 is used to cooperate with the thread of the adjusting screw 8. In addition, a bolt mounting hole 64 is provided at a position of the toothed plate 6 corresponding to the base through hole 11 of the base plate 10, and the hole diameter of the bolt mounting hole 64 is the same as the outer diameter of the connecting bolt 4, or slightly larger than the outer diameter of the connecting bolt 4.

[0055] like Figure 2 As shown, the gasket 7 is formed into a shape roughly corresponding to the toothed plate 6, and is sandwiched between the toothed plate 6 and the fuselage door bottom plate. A hole 71 is provided at a position of the gasket 7 corresponding to the base through hole 11 of the base plate 10, and the hole diameter of the hole 71 is the same as the outer diameter of the above-mentioned connecting bolt 4, or slightly larger than the outer diameter of the above-mentioned connecting bolt 4.

[0056] When the lock hook connection device is installed on the fuselage door opening, first, the lock hook base 1 and the toothed plate 6 are stacked and matched through the teeth, so that the protruding shaft 61 of the toothed plate 6 enters the groove 12 of the base plate 10, and the base through hole 11 is connected with the bolt installation hole 64 of the toothed plate 6 in the annular direction. Then, the gasket 7 is clamped between the toothed plate 6 and the fuselage door bottom plate. Next, the connecting bolt 4 is inserted into the base through hole 11 through the washer 5.

[0057] As described above, during installation, the lock hook base 1 and the toothed plate 6 are meshed with each other through teeth, and the radial position of the lock hook base 1 can be adjusted by changing the meshing position, that is, the radial position of the toothed portion 13 of the lock hook base 1 relative to the toothed portion 62 of the toothed plate 6. In addition, the threaded hole 63 of the convex shaft 61 of the toothed plate 6 is matched with the thread of the adjusting screw 8, and the lock hook base 1 can be moved along the tooth direction (heading) by rotating the adjusting screw 8. In addition, the gasket 7 can adjust the circumferential position of the lock hook base 1 and the toothed plate 6 as a whole by adjusting the thickness or number of the gasket. After completing the radial, heading and circumferential position adjustment in this way, the locking connecting bolt 4 can complete the connection between the lock hook connecting device and the main structure of the fuselage.

[0058] In the process of adjusting the position in radial, azimuth and circumferential directions, the radius of the connecting bolt 4 differs from the hole radius of the through hole 11 of the hook base by d, the radius of the imaginary circle of the protruding shaft 61 of the toothed plate 6 differs from the hole radius of the groove 12 of the protruding shaft 61 by d, and the radius of the long axis of the long round through hole 14 differs from the radius of the adjusting screw 8 by d, so that radial and azimuth adjustments can be achieved, and the maximum adjustment amount is d. In addition, the adjustment amount of the hook base 1 and the toothed plate 6 as a whole in the circumferential direction is the thickness or number of the gasket 7.

[0059] The door lock rod 2 is connected with the lock hook base 1, and the load of the cabin door can be transferred to the lock hook base 1. The lock hook base 1, the toothed plate 6 and the gasket 7 are connected to the main structure of the fuselage through the connecting bolts 4, and then the load can be transferred to the main structure of the fuselage.

[0060] The locking hook connection device of the embodiment of the present invention has a simple structure and can realize radial, directional and circumferential position adjustment. In addition, it is convenient and quick to install and simple to operate.

[0061] The lock hook connection device according to the above structure has the following effects:

[0062] 1) The installation position can be adjusted in the radial direction of the fuselage by changing the meshing position of the teeth of the lock hook base and the toothed plate, the installation position can be adjusted in the heading direction of the fuselage by cooperating with the threaded hole of the convex shaft of the toothed plate and the adjusting screw, and the installation position can be adjusted in the circumferential direction of the fuselage by the number or thickness of the gaskets;

[0063] 2) It can improve the efficiency of door assembly, save time and cost, and prevent forced assembly;

[0064] 3) The lock hook connection device can simultaneously transmit the circumferential, azimuth and radial loads on the door, fully ensuring the safety and reliability of the structure;

[0065] 4) Wear resistance is improved, and when wear occurs, only the support anti-wear plate needs to be replaced.

[0066] The above describes the embodiments of the present invention and its variations, but it should be understood that the present disclosure is not limited to the above embodiments and structures. The present disclosure also includes various variations and variations within the equivalent range. In addition, various combinations and methods, and other combinations and methods including only one element, above or below them, also belong to the scope and thought range of the present disclosure.

Claims

1. A locking hook connection device, comprising: A lock hook base (1), the lock hook base comprising a base plate (10) and a protrusion (20), a toothed portion (13) being arranged on the lower surface of the base plate facing the toothed plate, base through holes (11) penetrating in the circumferential direction being arranged at positions close to four corners of the base plate, the base through holes being passed through by connecting bolts, the radius of the connecting bolts being different from the hole radius of the base through holes by a specified value, the protrusion being formed in a manner of protruding upward in the circumferential direction from the base plate, a through hole penetrating in the circumferential direction being formed at a position close to the upper part of the protrusion, the through hole being passed through in the circumferential direction, the door lock rod being inserted into the through hole; A door lock rod (2), the door lock rod being hooked by a lock hook of the cabin door; A toothed plate (6), wherein a toothed portion (62) is provided on the upper surface of the toothed plate facing the base plate, and a bolt mounting hole (64) is provided at a position of the toothed plate corresponding to the base through hole; A connecting bolt (4) is passed through the base through hole and the bolt mounting hole to fasten the lock hook base and the toothed plate relative to the main structure of the fuselage. The lock hook base is engaged with the toothed plate through teeth, and the radial position of the lock hook base is adjusted by changing the engagement position.

2. The locking hook connection device according to claim 1, characterized in that: Also includes an adjusting screw (8), An oblong through hole (14) is provided inside the base plate and penetrates along the heading direction. A convex shaft (61) is provided on the upper surface of the toothed plate facing the base plate. The convex shaft is formed in a manner of protruding upward from the upper surface of the toothed plate. A threaded hole (63) is formed on the convex shaft. The threaded hole is used to cooperate with the thread of the adjusting screw. A groove (12) is formed at a position of the base plate corresponding to the convex shaft of the toothed plate. The radius of the imaginary circle of the convex shaft differs from the radius of the hole of the concave groove by a specified value. By rotating the adjusting screw, the locking hook base is moved along the heading.

3. The locking hook connection device according to claim 2, characterized in that: Also includes at least one gasket (7), The gasket is sandwiched between the toothed plate and the main fuselage structure.

4. The locking hook connection device according to any one of claims 1 to 3, characterized in that: It also includes a support anti-wear sheet (3), The lock hook base also includes an anti-wear plate mounting portion (30), which is arranged at a position between two base through holes in the direction of the base plate in a manner of protruding upward from the base plate in an annular manner, and the anti-wear plate mounting portion is used to install the support anti-wear plate thereon.

5. The lock hook connection device according to claim 2, characterized in that: The tooth portion is located in a region of the lower surface of the base plate avoiding the groove in the radial direction. The toothed portions are provided at positions sandwiching both sides of the convex shaft in the radial direction.

6. The locking hook connection device according to claim 2, characterized in that: A recessed portion (15) is provided on the surface of the base plate corresponding to the adjusting screw in the azimuth direction, and the recessed depth of the recessed portion in the azimuth direction is set such that when the adjusting screw is completely screwed in, the screw head of the adjusting screw can be accommodated in the recessed portion. The through hole is arranged in the recessed portion.

7. The locking hook connection device according to claim 2, characterized in that: The toothed portion is formed with a plurality of corrugated teeth.

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