CN108583843B

CN108583843B - Aircraft lifeboat hatch cover locking mechanism

Info

Publication number: CN108583843B
Application number: CN201810340549.3A
Authority: CN
Inventors: 郭琦; 马江照; 赵俊栋
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2018-06-21
Filing date: 2018-06-21
Publication date: 2021-04-20
Anticipated expiration: 2038-06-21
Also published as: CN108583843A

Abstract

A locking mechanism for the cabin cover of the lifesaving ship of airplane is composed of a cabin cover unit consisting of cabin cover, locking ring and latch pin, a lock ring is fixed on one side edge in the hatch cover, a bolt is fixed on the other side edge in the hatch cover, the mouth frame assembly comprises a mouth frame structure, a locking key assembly and a bolt support, the mouth frame structure is matched with the cabin cover assembly, the mouth frame structure is fixed on the airplane body, the locking key assembly comprises a guide bracket, a locking key and a limiting spring, the guide bracket is fixed on one side of the mouth frame structure, the end head of the locking key is connected with the driving device, a locking hook is fixed on the locking key, the latch hook can be inserted into a corresponding lock ring in the hatch cover, the bolt support is fixed on the other side edge of the opening frame structure, and the bolt support is provided with an insertion hole which corresponds to a bolt fixed on the other side edge in the hatch cover.

Description

Aircraft lifeboat hatch cover locking mechanism

Technical Field

The invention belongs to the field of airplane structure design, and relates to a locking mechanism for an airplane lifeboat hatch cover.

Background

A lifeboat on an airplane is placed in a lifeboat cabin, and a detachable cabin cover is installed on the upper surface of the cabin and used for maintaining the appearance of the airplane body and protecting the lifeboat. The rescue boat cabin cover is provided with a locking mechanism which is used as a connecting mechanism for reliably locking the cabin cover. When the hatch is closed, the locking mechanism ensures that the hatch can be locked and can not be opened under the action of aerodynamic force and other external force; when the hatch cover is opened, the locking mechanism is unlocked at a higher speed, the hatch cover is guaranteed to be separated from the restraint of the locking mechanism, the lifeboat is separated from the lifeboat cabin, and the purpose of quick lifesaving is achieved. Therefore, the locking mechanism of the hatch cover of the lifeboat is required to have simple structure, can bear the maximum load, and has flexible opening and closing, high reliability and convenient maintenance.

The existing scheme is that a set of motion mechanism and a set of driving device are respectively arranged on a cover and a bulkhead of a rescue boat. The motion mechanism consists of a push rod, a support, a pull rod, a crank, a bolt seat and the like. During emergency operation, the driving device pushes the push rod arranged on the support, then the pull rod is pushed to enable the crank to rotate, the telescopic pull rod connected to the crank is driven, the telescopic pull rod pulls the bolt to retract in the bolt seat, and the bolt is separated from the bolt hole in the cabin wall, so that the cabin cover is opened. When the hatch cover is closed, the bolt is inserted into the bolt hole by virtue of the pretightening force provided by the limiting spring connected to the bolt. The scheme has complex movement mechanism and difficult installation and debugging; the number of parts is large, the occupied space is large, and the weight is heavy. Meanwhile, due to the complex mechanism, the replacement and maintenance performance is poor when the device is used in an external field.

Disclosure of Invention

The invention designs a locking mechanism of a cabin cover of an airplane rescue ship, which has the advantages of simple structure, convenience in installation and debugging, small occupied space and convenience and quickness in maintenance.

A locking mechanism of a hatch cover of an airplane rescue boat comprises a hatch cover component and a hatch frame component, and is characterized in that the hatch cover component comprises a hatch cover, a locking ring and a bolt, wherein the hatch cover is formed by riveting a reinforcing bent plate and a skin plate with an appearance, the locking ring is fixed on one side edge in the hatch cover, the bolt is fixed on the other side edge in the hatch cover, and the bolt is in a protruding tongue piece shape; the mouth frame assembly comprises a mouth frame structure, a locking key assembly and a bolt support, the mouth frame structure is matched with the cabin cover, the mouth frame structure is fixed on an airplane body, the locking key assembly comprises a guide support, a locking key and a limiting spring, the locking key is embedded in a guide groove of the guide support, the guide support is fixed on one side edge of the mouth frame structure, the limiting spring is fixed between the locking key and the guide support, the end of the locking key is connected with a driving device, the locking key can move along the guide support, a locking hook is fixed on the locking key, the locking hook can be inserted on a corresponding locking ring in the cabin cover, the bolt support is fixed on the other side edge of the mouth frame structure, and an insertion hole is arranged on the bolt support and corresponds to a bolt fixed on the other side edge in the cabin cover.

The invention has the advantages that: the locking rings and the bolts on the two sides of the hatch cover component are matched with the locking key components and the jacks on the two sides of the opening frame component, so that the hatch cover of the rescue boat can be reliably locked; the driving mechanism drives the locking key to enable the locking mechanism connected to the locking key to be inserted into or separated from the locking ring, so that the hatch cover can be quickly opened and closed; through spacing spring coupling catch, set up the breach on the catch, can realize the quick replacement of catch, convenient maintenance.

The application is described in further detail below with reference to specific embodiments and the attached drawings:

drawings

Fig. 1 is a schematic view of an aircraft lifeboat hatch cover locking mechanism.

FIG. 2 is a schematic view of a hatch assembly.

Fig. 3 is a schematic view of a mouth frame assembly.

Fig. 4 is a schematic view of the structure of the mouth frame.

Fig. 5 is an exploded view of the installation of the latch assembly.

Fig. 6 is a schematic view of the engagement of the latch with the latch bracket.

Figure 7 is a schematic view of the locking mechanism in engagement with the locking ring (locking key and guide slot not shown).

Numbering names in the figures: 1 a hatch assembly; 2, a mouth frame component; 3, a locking key assembly; 4, a bolt bracket; 11 a hatch cover; 12 a locking ring; 13, a bolt; 21-port frame structure; 22 skin; 23 auxiliary lock cover mounting openings; 31 an auxiliary locking cover; 32 a steel cord; 33 a transition piece; 34 a locking key; 35 a flat lock; 36 a guide groove; 37, a bent edge locking mechanism; 38 a limit spring; 39 a support; 40 a guide bracket; a notch 41; 42 a boss; 43 a hook indicator; 44 hooks; 45, bending edges with holes; 46 tongue piece; and 47, inserting holes.

Detailed Description

Referring to the drawings, as shown in fig. 1, the invention relates to a locking mechanism of a cabin cover of an aircraft lifeboat, which comprises a cabin cover assembly 1, a mouth frame assembly 2, a locking key assembly 3 and a bolt bracket 4. As shown in fig. 2, the hatch cover assembly 1 is composed of a hatch cover 11, three locking rings 12 and three bolts 13, wherein the hatch cover 11 is formed by riveting an aluminum alloy bent plate pressed with a reinforcing pit and an aluminum alloy skin plate with an appearance; the lock ring 12 is a sheet metal part with a section shape of 'ㄣ', and is riveted on the hatch cover 11 to form an annular hole; the bolt 13 is a welded part with a T-shaped section, and the front end of the bolt is protruded to form a tongue piece 46. As shown in fig. 4, the mouth frame assembly 2 is composed of a mouth frame structure 21 and a skin 22, wherein the mouth frame structure 21 is a sheet metal part with a sunken middle opening; the opening frame structure is matched with the hatch cover and is fixed on the airplane body. The middle of the skin 22 is also provided with a large opening, the edge of the opening is flush with the sunken inner edge of the mouth frame structure, the mouth frame structure and the skin are both provided with appearances, and the front side positions of the openings of the mouth frame structure and the skin are provided with auxiliary lock cover mounting openings 23. The mouth frame structure 21 acts as a reinforcement in the region of the opening of the skin 22, the depression of the central opening serving to overlap the outer edge of the hatch 11, in addition to taking up the load around the opening. As shown in fig. 5, the latching assembly 3 is composed of an auxiliary latching cover 31, a steel cable 32, a transition piece 33, a latching key 34, a flat latch 35, a guide slot 36, a bent-

edge latch

37, 38, a support 39 and a guide bracket 40, wherein the auxiliary latching cover 31 is connected to the latching key 34 through the steel cable 32; a transition piece 33 connects the catch 34 and the drive means together; the locking key 34 is a strip-shaped part, three notches 41 are arranged on the locking key, a hook indicator 43 coated with red paint is arranged at one end of the locking key, and a boss 42 connected with the transition piece 33 is arranged at a position close to the hook indicator 43; the two flat locks 35 and the one curved lock 37 are both flat plate parts, and have hooks 44 at the upper ends thereof, except that the curved lock 37 has a curved edge 45 with holes at the lower end thereof; the guide groove 36 is a sheet metal part with a C-shaped section; the limit spring 38 is a coil spring that is subjected to an axial pulling force. The support 39 is a sheet metal part with a cross section in a shape like a Chinese character 'ji'; the guide bracket 40 is a machined part having a "T" shape in cross section, and is provided with a "T" shaped edge at its trailing end. The bolt support 4 is a machined part with a reinforcing rib and an L-shaped cross section, and is provided with a jack 47. The lock ring 12, the bolt 13, the flat lock 35, the guide groove 36 and the bent edge lock 37 are made of steel materials because of bearing load, the limit spring 38 is made of spring steel, and other parts which do not bear load are made of aluminum alloy.

In specific implementation, three lock rings 12 and three bolts 13 are connected to the hatch cover 11 through screws, so that the hatch cover assembly 1 is combined; the lock key component 3 is riveted at one side (close to the auxiliary lock cover mounting port 23) of the opening of the mouth frame component 2, and the bolt bracket 4 is riveted at the other side to form a mouth frame component, as shown in fig. 3; the hatch assembly 1 is mounted at the central opening of the aperture frame assembly. When the key locking assembly 3 is assembled, firstly, the three guide grooves 36 are riveted on the guide bracket 40 according to the size, the support 39 is arranged on the T-shaped tail end of the guide bracket 40, and the limiting spring 38 is hung on the support 39; then riveting the two flat locking mechanisms 36 and the bent edge locking mechanism 37 on the locking key 34, respectively aligning the three notches 41 of the locking key 34 with the three guide grooves 36 and then loading the notches, and sliding the locking key 34 backwards to hook the limiting spring 38 into the bent edge 45 with the hole of the bent edge locking mechanism 37; finally, the catch 34 is connected to the auxiliary locking cap 31 by means of a cable 32, while the catch 34 is connected to the drive by means of a transition piece 33.

In practice, as shown in fig. 6 and 7, the positions of the three insertion holes 47 of the latch holder 4 are matched with the positions of the tongues 46 of the three latches 13, and the positions of the two flat locks 35 and the one bent-edge lock 37 are matched with the positions of the three lock rings 12. Meanwhile, the positions of the three notches 41 on the locking key 34 are matched with the positions of the three guide grooves 36, and the notches 41 on the locking key 34 are not allowed to enter the three guide grooves 36 in the effective stroke of the locking key 34.

After assembly, the notched end of the catch 34 contacts the "T" shaped end of the guide bracket 40, and the end of the hook 44 is spaced from the end of the guide slot 36 by 5mm to 7 mm. The hook indicator 43 is visible through the auxiliary-lock-cover mounting port 23 when the auxiliary lock cover 31 is opened. At this time, on the outer surface of the skin 22 corresponding to the hook indicator 43, a "closed" mark is made with red paint, and an "open" mark is made at a position forward by L millimeters (the length of L is determined by the length of the hook 44). The hatch cover assembly 1 is put into the entrance frame structure 21 obliquely, the tongue pieces 46 of the three bolts 13 are aligned and inserted into the three insertion holes 47 on the bolt support 4, the auxiliary locking cover 31 is pulled to drive the locking keys 34 to move linearly forwards in the three guide grooves 36 against the pulling force of the limiting springs 38, when the hook indicator 43 moves forwards to the 'open' mark, the hatch cover assembly 1 is put into the entrance frame structure 21 integrally, the auxiliary locking cover 31 is released, the locking keys 34 move linearly backwards under the pulling force of the limiting springs 38 to drive the two flat locking mechanisms 35 and the one bent edge locking mechanism 37 to be inserted into the locking rings 12 of the hatch cover assembly 1, the hatch cover assembly 1 is closed, and the hook indicator 43 returns to the 'closed' mark. After the hatch assembly 1 is closed, the auxiliary locking cover 31 is closed. The use of the auxiliary locking cap 31 for opening the cover assembly 1 of the lifeboat is only used during ground maintenance of the equipment in the cabin, while during normal emergency use the cover assembly 1 is opened by means of a drive connected to the transition piece 33.

During maintenance of the catch assembly 3, the hatch cover assembly 1 is simply opened by the auxiliary locking cover 31, and sufficient lubrication is performed on the catch 34 and the three guide grooves 36. When the key 34, the flat lock 35 and the bent lock 37 need to be replaced, the drive device and the transition piece 33, the steel cable 32 and the key 34, and the bent lock 37 and the limit spring 38 are disconnected, and then the key 34 is detached and replaced through the three notches 41 arranged on the key 34.

After the locking mechanism of the aircraft rescue boat hatch cover is installed on an aircraft, the reliable locking of the rescue boat hatch cover assembly 1 is realized by the way that three lock rings 12 at one side of the hatch cover assembly 1 are matched with two flat locking mechanisms 35 and one bent edge locking mechanism 37 on a locking key assembly 3, and three bolts 13 at the other side are matched with three jacks 47 on a bolt support 4; by driving the lock key 34 on the lock key assembly 3, two flat lock mechanisms 35 and a bent edge lock mechanism 37 connected to the lock key 34 are inserted into and separated from the lock ring 12, so that the hatch cover assembly 1 is quickly opened and closed; connect limit spring 38 and turn round edge locking mechanism 37, set up three breach 41 on the catch 34, can realize the quick replacement of catch subassembly 3, conveniently maintain the use.

Claims

1. A locking mechanism of a hatch cover of an airplane rescue boat comprises a hatch cover component and a hatch frame component, and is characterized in that the hatch cover component comprises a hatch cover, a locking ring and a bolt, wherein the hatch cover is formed by riveting a reinforcing bent plate and a skin plate with an appearance, the locking ring is fixed on one side edge in the hatch cover, the bolt is fixed on the other side edge in the hatch cover, and the bolt is in a protruding tongue piece shape; the mouth frame assembly comprises a mouth frame structure, a locking key assembly and a bolt support, the mouth frame structure is matched with the cabin cover assembly, the mouth frame structure is fixed on an airplane body, the locking key assembly comprises a guide support, a locking key and a limiting spring, the locking key is embedded in a guide groove of the guide support, the guide support is fixed on one side edge of the mouth frame structure, the limiting spring is fixed between the locking key and the guide support, the end of the locking key is connected with a driving device, the locking key can move along the guide support, a locking hook is fixed on the locking key, the locking hook can be inserted on a corresponding locking ring in the cabin cover, the bolt support is fixed on the other side edge of the mouth frame structure, and an insertion hole is formed in the bolt support and corresponds to a bolt fixed on the other side edge in the cabin cover.

2. An aircraft lifeboat hatch locking mechanism as claimed in claim 1 wherein said locking ring is a sheet metal part having a cross-sectional shape of "ㄣ" which is riveted to the inside edge of the hatch to form an annular aperture.

3. An aircraft lifeboat hatch locking mechanism according to claim 1 wherein the catch is an elongated member having three notches formed therein for use in mounting the catch to the guide bracket, the catch having a hook indicator at one end thereof, the hook indicator being painted with red paint to see if the locking mechanism is closed in place, a boss being provided adjacent the hook indicator for connection to the drive means; the flat latch hook fixed on the latch key is matched with the latch ring on the hatch cover component.