阅读说明：本技术 一种灭火型飞机投水舱门 (Fire-extinguishing type airplane water-feeding cabin door ) 是由 张�浩 刘木君 谷刚 于 2021-10-18 设计创作，主要内容包括：本发明公开了一种灭火型飞机投水舱门。包括门体组件,门体组件上集成有作动组件和舱门锁组件；所述的门体组件包括由直围框(4)和弯围框(5)围成的门框,门框内沿长边方向设有一个以上相互平行的铰链臂(6),门框内沿长边方向还设有一个以上的锁环座(11),门框外侧由蒙皮(3)覆盖；所述的作动组件包括与门体组件铰接的开闭作动器(2)；所述的舱门锁组件包括锁闭驱动组件和锁钩组件,锁闭驱动组件用于驱动锁钩组件脱离/钩扣锁环座(11)；所述的门体组件能沿铰链臂(6)形成的铰链轴线转动。本发明具有结构简单、重量轻、运动同步性高、普通机加件设计以及装配通路开敞的特点。(The invention discloses a fire-extinguishing type airplane water-feeding cabin door. The door body assembly is integrated with an actuating assembly and a cabin door lock assembly; the door body assembly comprises a door frame enclosed by a straight enclosing frame (4) and a bent enclosing frame (5), more than one hinge arm (6) which are parallel to each other are arranged in the door frame along the long edge direction, more than one lock ring seat (11) are also arranged in the door frame along the long edge direction, and the outer side of the door frame is covered by a skin (3); the actuating component comprises an opening and closing actuator (2) hinged with the door body component; the cabin door lock assembly comprises a locking driving assembly and a locking hook assembly, wherein the locking driving assembly is used for driving the locking hook assembly to be separated from/hook the locking ring seat (11); the door body assembly can rotate along a hinge axis formed by the hinge arm (6). The invention has the characteristics of simple structure, light weight, high motion synchronism, common machining part design and open assembly passage.)

1. The utility model provides a fire extinguishing type aircraft throws water hatch door which characterized in that: the door body assembly is integrated with an actuating assembly and a cabin door lock assembly; the door body assembly comprises a door frame enclosed by a straight enclosing frame (4) and a bent enclosing frame (5), more than one hinge arm (6) which are parallel to each other are arranged in the door frame along the long edge direction, more than one lock ring seat (11) are also arranged in the door frame along the long edge direction, and the outer side of the door frame is covered by a skin (3); the actuating component comprises an opening and closing actuator (2) hinged with the door body component; the cabin door lock assembly comprises a locking driving assembly and a locking hook assembly, wherein the locking driving assembly is used for driving the locking hook assembly to be separated from/hook the locking ring seat (11); the door body assembly can rotate along a hinge axis formed by the hinge arm (6).

2. The fire-fighting type aircraft drop door according to claim 1, wherein the locking drive assembly comprises two parallel rotating shaft seats (27) mounted on the door frame along the width direction of the door frame, a torque tube (21) is rotatably connected between the two rotating shaft seats (27), one end of the torque tube (21) is connected with the mechanism actuator (1) through a long rocker arm (20), and the other end of the torque tube (21) is connected with the latch hook assembly through a short rocker arm (19); the latch hook assembly comprises latch hooks which are correspondingly arranged above the latch ring seat (11) and hinged to the door body assembly through the latch hook seat, adjacent latch hooks are connected through pull rods, and the latch hook positioned at the end part is also connected with the short rocker arm (19) through the pull rods.

3. Fire-fighting type aircraft drop door according to claim 2, characterized in that the pivot seat (27) on the side close to the hinge axis is connected to the door frame via a small corner box (23); the rotating shaft seat (27) far away from one side of the hinge axis is connected with the door frame through a large angle box (24).

4. Fire-fighting type aircraft drop door according to claim 3, characterized in that the door frame on the side facing away from the torsion tube (21) is also provided with a small angle box (23) and a large angle box (24) respectively.

5. Fire-fighting aircraft drop door according to claim 1, characterized in that the door frame is further provided with longitudinal beams (7) and transverse beams (10) in the direction of the long and end edges, respectively.

6. Fire-fighting type aircraft drop door according to claim 5, characterized in that the hinge arm (6) is a gooseneck type machined part, which is bolted to the door frame and the longitudinal beam (7) by means of machined flanges, respectively; the door frame is a Z-shaped facing machine added part, and the long edge of the door frame is butted with the bent straight section of the short edge of the door frame through mechanical sinking; the longitudinal beam (7) is an I-shaped added beam of a facing machine, the width of an inner edge strip is gradually changed, the inner edge strips at two ends are organically sunk, and a sunk area is inserted into the short edge of the door frame and then flanged and riveted.

7. A fire suppression aircraft drop door as defined in claim 1 wherein: a circle of outward flanging is further arranged along the periphery of the door frame, and a sealing strip (8) is arranged in the inner side of the outward flanging to form a continuous sealing interface.

8. A fire suppression aircraft water delivery hatch as defined in claim 5 wherein: backing plates (9) are also dispersedly arranged on the door frame and the longitudinal beam (7) and are used for dispersedly transmitting the upward water load borne by the cabin door to the frame structure of the opening of the fuselage.

9. A fire suppression aircraft water delivery hatch as defined in claim 5 wherein: the lock ring seats (11) are arranged in 4 groups and are connected with the door frame and the longitudinal beam (7) to form an integral structure, so that the load on the lock hook is dispersed and transmitted to the frame structure of the opening of the machine body.

10. A fire suppression aircraft water delivery hatch as defined in claim 5 wherein: opening and closing actuator (2) are connected in door body subassembly middle part to link to two vertical roof beams (7) altogether simultaneously, do benefit to bearing and transmit the even compression of carrying of sealing strip (8) when concentrated force load on opening and closing actuator (2) and hatch door are closed.

Technical Field

The invention belongs to the technical field of airplane cabin door design, and particularly relates to a fire-extinguishing type airplane water-feeding cabin door.

Background

The water throwing cabin door is an actuating part for the fire-extinguishing type airplane to perform a water throwing fire extinguishing task in the air, and is also a component of a ship bottom structure, a water tank structure and an airplane body structure of the airplane. When an aircraft is planing or drawing water on the water surface, the water-throwing process needs to bear the external upward impact water load acting on the cabin door skin. When water is loaded in the water tank, the water injection cabin door needs to bear downward hydraulic load because of being positioned at the bottom of the water tank, and simultaneously, the load superposition coefficient generated by the overload of the airplane is also considered.

The airplane executes the air water-throwing fire-extinguishing task, needs the cabin door to realize rapid unhooking and water throwing under the bearing state, and requires the water-throwing cabin door to have good strength and rigidity characteristics, and simultaneously requires the driving control of the cabin door mechanism to have high synchronism.

The existing cabin door for the water-throwing fire-extinguishing task is mostly a blocking type inward-opening cabin door, the size of the cabin door is small, the cabin door can be opened quickly under the high-speed flight state of an airplane to throw water difficultly, and the cabin door opening is difficult to restore to a complete locking and watertight state by self. The cabin door of the structure is mainly suitable for a water tank structure of a fire-fighting helicopter, but is difficult to be suitable for a larger fire-fighting type airplane.

Disclosure of Invention

The purpose of the invention is: a fire-fighting aircraft water-drop hatch door is provided. The invention has the characteristics of simple structure, light weight, high motion synchronism, common machining part design and open assembly passage.

The technical scheme of the invention is as follows: a fire-extinguishing type airplane water-feeding cabin door comprises a door body assembly, wherein an actuating assembly and a cabin door lock assembly are integrated on the door body assembly; the door body assembly comprises a door frame enclosed by a straight enclosing frame and a bent enclosing frame, more than one hinge arm which are parallel to each other is arranged in the door frame along the long edge direction, more than one lock ring seat is also arranged in the door frame along the long edge direction, and the outer side of the door frame is covered by a skin; the actuating component comprises an opening and closing actuator hinged with the door body component; the cabin door lock assembly comprises a locking driving assembly and a locking hook assembly, wherein the locking driving assembly is used for driving the locking hook assembly to be separated from/hook to lock the ring seat; the door body assembly can rotate along a hinge axis formed by the hinge arm.

In the fire extinguishing type aircraft water-dropping cabin door, the locking driving assembly comprises two rotating shaft seats which are parallel to each other and are arranged on the door frame along the width direction of the door frame, a torque tube is rotatably connected between the two rotating shaft seats, one end of the torque tube is connected with the mechanism actuator through a long rocker arm, and the other end of the torque tube is connected with the latch hook assembly through a short rocker arm; the lock hook assembly comprises lock hooks which are correspondingly arranged above the lock ring seat and hinged to the door body assembly through the hook seat, adjacent lock hooks are connected through pull rods, and the lock hook positioned at the end part is also connected with the short rocker arm through the pull rod.

In the fire extinguishing type airplane water delivery cabin door, the rotating shaft seat on one side close to the hinge axis is connected with the door frame through the small angle box; the rotating shaft seat far away from one side of the hinge axis is connected with the door frame through a large angle box.

In the fire extinguishing type aircraft water injection cabin door, the door frame on one side departing from the torsion tube is also correspondingly provided with the small angle box and the large angle box.

In the fire extinguishing type aircraft water-dropping door, the door frame is also provided with a longitudinal beam and a transverse beam along the long direction and the end direction.

In the fire extinguishing type aircraft water feeding cabin door, the hinge arm is a gooseneck type machining piece and is respectively in bolt connection with the door frame and the longitudinal beam through machining flanging; the door frame is a Z-shaped facing machine added part, and the long edge of the door frame is butted with the bent straight section of the short edge of the door frame through mechanical sinking; the longitudinal beam is an I-shaped added beam of a facing machine, the width of an inner edge strip is gradually changed, the inner edge strips at two end heads are organically sunk, and a sunk area is inserted into the short edge of the door frame and then flanged and riveted.

In the fire extinguishing type aircraft water throwing cabin door, a circle of outward flanging is further arranged along the periphery of the door frame, and a sealing strip is arranged inside the inward side of the outward flanging to form a continuous sealing interface.

In the fire extinguishing type aircraft water delivery cabin door, the door frame and the longitudinal beam are also dispersedly provided with the backing plates for dispersedly transmitting the upward water load borne by the cabin door to the opening frame structure of the aircraft body.

In the fire extinguishing type aircraft water throwing cabin door, the lock ring seats are arranged in 4 groups and are connected with the door frame and the longitudinal beam to form an integral structure, so that the load on the lock hook is dispersed and transmitted to the structure of the opening frame of the aircraft body.

In the fire extinguishing type aircraft water delivery cabin door, the opening and closing actuator is connected to the middle area of the door body assembly and is simultaneously connected with the two longitudinal beams, so that the concentrated force load on the opening and closing actuator can be borne and compressed uniformly by the sealing strip when the cabin door is closed.

The invention has the advantages that: the invention has the characteristics of simple structure, light weight, common machining part design, open assembly passage, strong maintainability and good strength and rigidity performance. The cabin door is designed in a non-blocking mode, has good strength and rigidity performance, and can simultaneously bear the water surface sliding water load and the water tank water-carrying pressure load. The invention has simple opening and closing movement principle, clear movement tracks of the door body assembly and the cabin door mechanism, and is not easy to have the problem of movement interference, thereby being beneficial to the structural space arrangement design between the cabin door and the machine body. The invention can bear the water surface sliding water load and the water tank water-carrying pressure load at the same time, the time delay of the hatch opening process is low, and the motion synchronism of the unhooking of the hatch mechanism is high. The invention is an open structure, has good accessibility, is beneficial to assembly, manufacture and later-stage use and maintenance, meanwhile, corrosive substances/liquid are not easy to accumulate and reserve, and the hatch door is beneficial to use in high-temperature, high-humidity and high-salt-spray environments. The sealing strip is installed on the outer side edge of the door body assembly, the surface of the area is flat and smooth, and no step difference or bulge exists, so that the installation of the sealing strip is facilitated, and a continuous and stable sealing interface is also facilitated to be formed.

Drawings

FIG. 1 is a schematic structural view of a fire-fighting type aircraft water-feeding hatch door provided by the invention;

FIG. 2 is a schematic view of the door body assembly of the present invention;

FIG. 3 is a schematic view of the hatch mechanism of the present invention;

figure 4 is a schematic view of the structure of the hatch support of the invention.

Reference numerals: the device comprises a 1-mechanism actuator, a 2-opening and closing actuator, a 3-skin, a 4-straight surrounding frame, a 5-bent surrounding frame, a 6-hinge arm, a 7-longitudinal beam, a 8-sealing strip, a 9-base plate, a 10-transverse beam, an 11-locking ring seat, a 12-retractable actuator support, a 13-first-level pull rod, a 14-second-level pull rod, a 15-third-level pull rod, a 16-fourth-level pull rod, a 17-single-lug locking hook, an 18-double-lug locking hook, a 19-short rocker, a 20-long rocker, a 21-torsion tube, a 22-end hook seat, a 23-small-angle box, a 24-large-angle box, a 25-mechanism actuator support, a 26-middle hook seat and a 27-rotating shaft seat.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example 1. A fire-extinguishing type airplane water-feeding cabin door is formed as shown in figures 1-4 and comprises a door body assembly, wherein an actuating assembly and a cabin door lock assembly are integrated on the door body assembly; the door body assembly comprises a door frame which is formed by enclosing a straight enclosing frame 4 and a bent enclosing frame 5, more than one hinge arm 6 which are parallel to each other is arranged in the door frame along the long edge direction, more than one lock ring seat 11 is also arranged in the door frame along the long edge direction, and the outer side of the door frame is covered by a skin 3; the actuating component comprises an opening and closing actuator 2 hinged with the door body component; the cabin door lock assembly comprises a locking driving assembly and a locking hook assembly, wherein the locking driving assembly is used for driving the locking hook assembly to be separated from/hooked and buckled with the locking ring seat 11; the door assembly can rotate along a hinge axis formed by the hinge arm 6.

The locking driving assembly comprises two rotating shaft seats 27 which are parallel to each other and are arranged on the door frame along the width direction of the door frame, a torsion tube 21 is rotatably connected between the two rotating shaft seats 27, one end of the torsion tube 21 is connected with the mechanism actuator 1 through a long rocker arm 20, and the other end of the torsion tube 21 is connected with the latch hook assembly through a short rocker arm 19; the latch hook assembly comprises latch hooks (latch hook structures refer to a single-lug latch hook 17 and a double-lug latch hook 18 in fig. 3) which are correspondingly arranged above the latch ring seat 11 and hinged on the door body assembly through latch seats (latch seat structures refer to an end latch seat 22 and a middle latch seat 26 in fig. 4), adjacent latch hooks are connected through pull rods (the pull rods refer to a second-stage pull rod 14, a third-stage pull rod 15 and a fourth-stage pull rod 16 in fig. 3), and the latch hooks at the end parts are also connected with a short rocker arm 19 through pull rods (the pull rods refer to a first-stage pull rod 13 in fig. 3).

The rotating shaft seat 27 close to one side of the hinge axis is connected with the door frame through the small angle box 23; the rotating shaft seat 27 at one side far away from the hinge axis is connected with the door frame through the large angle box 24.

The door frame on the side away from the torsion tube 21 is also provided with a small angle box 23 and a large angle box 24.

The door frame is also provided with a longitudinal beam 7 and a transverse beam 10 along the long end edge direction and the end edge direction respectively.

The hinge arm 6 is a gooseneck type machined part and is respectively in bolted connection with the door frame and the longitudinal beam 7 through machined flanges; the door frame is a Z-shaped facing machine added part, and the long edge of the door frame is butted with the bent straight section of the short edge of the door frame through mechanical sinking; the longitudinal beam 7 is an I-shaped added beam of a facing machine, the width of an inner edge strip is gradually changed, the inner edge strips at two ends are organically sunk, and a sunk area is inserted into the short edge of the door frame and then flanged and riveted.

A circle of outward flanging is further arranged along the periphery of the door frame, and a sealing strip 8 is arranged in the inner side of the outward flanging to form a continuous sealing interface.

Backing plates 9 are also dispersedly arranged on the door frame and the longitudinal beam 7 and are used for dispersedly transmitting the upward water load borne by the cabin door to the frame structure of the opening of the fuselage.

The lock ring seats 11, 4 groups in total, are arranged and connected with the door frame and the longitudinal beam 7 to form an integral structure, so that the load on the lock ring is dispersed and transmitted to the frame structure of the opening of the machine body.

The opening and closing actuator 2 is connected to the middle area of the door body assembly and is simultaneously connected with the two longitudinal beams 7, so that the concentrated force load on the opening and closing actuator 2 can be borne and transmitted, and the sealing strips 8 can be uniformly loaded and compressed when the door is closed.

The hatch opening process is as follows: the mechanism actuator 1 extends out to drive the torque tube 21 to rotate, and further drives the pull rod to pull the lock hook to rotate, so that the lock hook is separated from the lock ring seat 11; at this time, the opening and closing actuator 2 is extended to push the cabin door to rotate along the coach axis, and then the cabin door is opened.

Example 2. Referring to fig. 1 to 4, the main structure of the fire-fighting aircraft water-feeding hatch door provided by the present invention includes four parts, namely, an actuating device, a door body assembly, a hatch door mechanism and a hatch door support. The actuating device comprises a mechanism actuator 1 and an opening and closing actuator 2; the door body assembly comprises a skin 3, a door frame consisting of a straight surrounding frame 4 and a bent surrounding frame 5, a hinge arm 6, a longitudinal beam 7, a sealing strip 8, a backing plate 9, a transverse beam 10, a locking ring seat 11 and a retractable actuator support 12; the hatch door mechanism comprises a pull rod (comprising a first-level pull rod 13, a second-level pull rod 14, a third-level pull rod 15 and a fourth-level pull rod 16), a latch hook (comprising a single-lug latch hook 17 and a double-lug latch hook 18), a short rocker arm 19, a long rocker arm 20 and a torsion tube 21; the hatch seat comprises a hook seat (comprising an end hook seat 22 and a middle hook seat 26), a small angle box 23, a large angle box 24, a mechanism actuator seat 25 and a rotating shaft seat 27.

In the actuating device, the upper end of a mechanism actuator 1 is connected with a mechanism actuator support 25, and the lower end is connected with a long rocker arm 20; the upper end of the opening and closing actuator 2 is connected with the machine body structure, and the lower end is connected with the support 12 of the deploying and retracting actuator.

Further, in fig. 1, the mechanism actuator 1 and the opening/closing actuator 2 are both in the retracted state. The mechanism actuator 1 extends to drive the torque tube 21 to rotate clockwise, so as to drive the monaural lock hook 17 and the binaural lock hook 18 to rotate anticlockwise and unhook, otherwise, the mechanism actuator is hooked; the opening and closing actuator 2 extends to drive the door body assembly to rotate downwards around the axis of the lug of the hinge arm 6, the water delivery cabin door is opened, and otherwise, the closing movement is performed.

In the figure 2 of the door body assembly, the end straight sections of two straight surrounding frames 4 and two bent surrounding frames 5 are mutually overlapped to form a surrounding frame structure, and the overlapped parts are connected through rivets.

Furthermore, the three longitudinal beams 7 are arranged in parallel with the straight surrounding frame 4 at equal intervals, strips at two side edges of the longitudinal beams 7 are added with sinking parts and inserted and lapped at the inner sides of the flanging of the bent surrounding frame 5, and the lapping parts are connected through rivets.

Furthermore, the lower parts of the two hinge arms 6 are mechanically flanged and attached to the two flanges of the straight surrounding frame 4 and the three longitudinal beams 7 and are connected through bolts.

Further, the skin 3 is attached to the outer side edge strips of the straight surrounding frame 4, the bent surrounding frame 5 and the longitudinal beam 7, and the overlapping parts are connected through rivets.

Furthermore, the web plate of the transverse beam 10 is respectively connected with the web plate of the hinge arm 6, the web plate reinforcing rib of the longitudinal beam 7 and the web plate reinforcing rib of the straight surrounding frame 4 through rivets; the flanging of the transverse beam 10 is attached to the inner side of the skin 3 and is connected through rivets.

Furthermore, the four lock ring seats 11 are respectively attached to the inner edge strips of the corresponding straight surrounding frame 4, the corresponding bent surrounding frame 5 and the corresponding longitudinal beam 7 and are connected through bolts.

Further, the retractable actuator supports 12 are respectively attached to the inner edge strips of the two longitudinal beams 7 and connected through bolts.

Further, 14 backing plates 9 are correspondingly arranged on the inner edge strips of the straight surrounding frame 4, the bent surrounding frame 5 and the longitudinal beam 7 and are connected through rivets.

The hatch support seat is fixedly connected with the frame structure of the fuselage mouth through bolts, namely an end hook seat 22, a small angle box 23, a large angle box 24, a mechanism actuator support seat 25, a middle hook seat 26 and a rotating shaft seat 27 in the drawing of figure 4.

Further, the lower flanging of the two mechanism actuator supports 25 are respectively connected with the protruding parts of the small angle box 23 and the large angle box 24 through bolts.

Further, the two end hook seats 22 are respectively connected with the far end convex parts of the large angle boxes 24 arranged at the two sides through bolts.

In the cabin door mechanism diagram 3, a short rocker arm 19 and a long rocker arm 20 are connected with a torque tube 21 through bolts, and a first-stage pull rod 13, a second-stage pull rod 14, a third-stage pull rod 15, a fourth-stage pull rod 16, a single-lug lock hook 17, a double-lug lock hook 18 and the short rocker arm 19 are connected through bolts as rotating shafts.

Furthermore, the short rocker arm 19 and the long rocker arm 20 are respectively placed between two ears of the two rotating shaft seats 27, the torque tube 21 penetrates through the hole of the short rocker arm 19, the hole of the long rocker arm 20 and the holes of the two rotating shaft seats 27, and the short rocker arm 19 and the long rocker arm 20 are fixedly connected with the torque tube 21 through bolts.

Further, the single-lug lock hook 17 and the double-lug lock hook 18 are connected with the end hook seat 22 and the middle hook seat 26 through bolts as rotating shafts.

Further, in the installation process of the cabin door mechanism, the cabin door support is firstly installed in place, then the short rocker arm 19, the long rocker arm 20, the torsion tube 21, the ear latch hook 17 and the double ear latch hook 18 are installed in place, and finally the first-level pull rod 13, the second-level pull rod 14, the third-level pull rod 15 and the fourth-level pull rod 16 are installed in place.

Example 3. A fire-extinguishing type aircraft water-feeding cabin door is shown in figures 1-4 and comprises: the mechanism comprises a mechanism actuator 1, an opening and closing actuator 2, a skin 3, a straight surrounding frame 4, a bent surrounding frame 5, a hinge arm 6, a longitudinal beam 7, a sealing strip 8, a base plate 9, a transverse part 10, a locking ring seat 11, a folding and unfolding actuator support 12, a first-level pull rod 13, a second-level pull rod 14, a third-level pull rod 15, a fourth-level pull rod 16, a single-lug locking hook 17, a double-lug locking hook 18, a short rocker 19, a long rocker 20, a torsion tube 21, an end hook seat 22, a small-angle box 23, a large-angle box 24, a mechanism actuator support 25, a middle hook seat 26 and a rotating shaft seat 27; wherein the content of the first and second substances,

the skin 3, the straight surrounding frame 4, the bent surrounding frame 5, the hinge arm 6, the longitudinal beam 7, the sealing strip 8, the cushion plate 9, the transverse part 10, the locking ring seat 11 and the retractable actuator support 12 are fixedly connected through fasteners to form a door body structure;

the first-stage pull rod 13, the second-stage pull rod 14, the third-stage pull rod 15, the fourth-stage pull rod 16, the single-lug lock hook 17, the double-lug lock hook 18, the short rocker arm 19, the long rocker arm 20 and the torsion tube 21 are connected through bolts to form a cabin door mechanism;

the end hook seat 22, the small angle box 23, the large angle box 24, the mechanism actuator support 25, the middle hook seat 26 and the rotating shaft seat 27 are fixedly connected with the machine body opening frame structure through bolts to form a cabin door support, the cabin door support is a rotating motion intersection point of the cabin door mechanism, and meanwhile, the load borne by the water injection cabin door can be dispersedly transmitted to the machine body structure through the cabin door support;

the mechanism actuator 1 and the opening and closing actuator 2 are separately arranged and driven to actuate step by step.

Wherein, the upper end of the mechanism actuator 1 is connected with the mechanism actuator support 25, and the lower end is connected with the long rocker arm 20; the upper end of the opening and closing actuator 2 is connected with the machine body structure, and the lower end is connected with the support 12 of the deploying and retracting actuator; the gooseneck support lug of the hinge arm 6 is connected with the machine body structure, so that the door body assembly rotates around the connecting axis; the cabin door support is connected with the machine body structure, is used as a motion switching support of the cabin door mechanism, and disperses and transmits the load on the water delivery cabin door.

The straight surrounding frame 4 and the bent surrounding frame 5 are Z-shaped added parts of a face cutting machine, and are butted with the short straight section of the bent surrounding frame 5 through mechanical sinking of the straight surrounding frame 4.

The hinge arm 6 is a gooseneck type machining piece and is in bolted connection with the straight surrounding frame 4 and the longitudinal beam 7 through 5 machining turned edges respectively.

The longitudinal beam 7 is an I-shaped added beam of a facing machine, the width of an inner edge strip is gradually changed, the inner edge strips at two ends are organically sunk, and sunk areas are inserted into the inner sides of inner flanges of the curved enclosure frames 5 and are riveted.

The sealing strips 8 are arranged on the inner sides of the outward flanges of the straight surrounding frame 4 and the bent surrounding frame 5 to form a continuous sealing interface.

The backing plates 9, the number of which is 14, are dispersedly arranged outside the inner edge strips of the straight surrounding frames 4, the bent surrounding frames 5 and the longitudinal beams 7 so as to dispersedly transfer upward water load borne by the cabin door to the structure of the fuselage mouth frame.

The lock ring seats 11, totally 4 groups, are arranged outside inner edge strips of the straight surrounding frame 4, the bent surrounding frame 5 and the longitudinal beam 7, and realize the common connection with the straight surrounding frame 4/the bent surrounding frame 5 and the longitudinal beam 7, so that the loads on the single-lug lock hook 17 and the double-lug lock hook 18 are dispersed and transmitted to the frame structure of the opening of the machine body, and the closed state and the watertight performance of the water-throwing cabin door are maintained at the same time.

The retractable actuator support 12 is arranged in the middle area of the door body structure and is simultaneously connected with the inner edge strips of the two longitudinal beams 7, so that the concentrated force load on the opening and closing actuator 2 can be better borne and transmitted, and the uniform loading and compression of the sealing strips 8 when the cabin door is closed are facilitated.

The first-stage pull rod 13, the second-stage pull rod 14, the third-stage pull rod 15, the fourth-stage pull rod 16, the single-lug lock hook 17, the double-lug lock hook 18, the short rocker arm 19, the long rocker arm 20 and the torsion tube 21 are connected through bolts, and synchronous driving control of the cabin door mechanism can be achieved.

The short rocker arm 19, the long rocker arm 20, and the torsion tube 21 convert the elongation of the mechanism actuator 1 into a rotation angle required for the mechanism motion.

The first-stage pull rod 13, the second-stage pull rod 14, the third-stage pull rod 15, the fourth-stage pull rod 16, the single-lug lock hook 17 and the double-lug lock hook 18 are connected through bolts serving as rotating shafts, and synchronous driving control over the plurality of lock hooks is achieved; meanwhile, the serial connection form of the plurality of rod systems enables the mechanism principle to be simple, and the transmission synchronism to be high.

The single-lug lock hook 17 and the double-lug lock hook 18 are respectively connected with the end hook seat 22 and the middle hook seat 26 through bolts as rotating shafts, so that concentrated force load borne by the lock hooks is dispersed and transmitted, and meanwhile, the lock hooks rotate around the rotating shafts to realize hooking and unhooking.

The bottom plates of the small angle box 23 and the large angle box 24 are fixedly connected with the frame structure of the opening of the machine body, and the lower flange is contacted with the backing plate 9 in the structure of the door body, so that the load born by the door body is dispersed and transmitted.

The extending end of the large angle box 24 is connected with the bottom plate of the end hook seat 22, and the concentrated force load of the single-lug lock hook 17 and the double-lug lock hook 18 borne on the end hook seat 22 is dispersed and transmitted.

The above embodiments are merely illustrative of the embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.