CN111535686A

CN111535686A - Adjustable hook lock for aviation cabin door

Info

Publication number: CN111535686A
Application number: CN202010467284.0A
Authority: CN
Inventors: 韦坚; 宋伟斌; 徐建华
Original assignee: Xi'an Alite Aviation Technology Co ltd
Current assignee: Xi'an Alite Aviation Technology Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-08-14

Abstract

The invention discloses an adjustable hook lock for an aviation cabin door, which comprises a shell and a lock body, wherein the lock body is rotatably connected with one end of the shell through a first torsion spring, two ends of the first torsion spring are respectively abutted against the shell and the lock body, the first torsion spring is used for rotating the shell relative to the lock body, a trigger part is arranged on the shell through a second torsion spring, two ends of the second torsion spring are respectively abutted against the trigger part and the shell, the second torsion spring is used for rotating the trigger part relative to the shell, and the trigger part is used for pulling or loosening the lock body to complete locking or unlocking; the lock body comprises an adjusting mechanism and a lock hook, and the adjusting mechanism is used for adjusting the length of the lock hook; the length of the lock hook can be adjusted, and the applicability is wide; the length of adjusting the latch hook through setting up adjustment mechanism can adapt to the hatch door of multiple model, can adjust the lock to suitable length in order to reach suitable atress condition according to installation operating mode, can effectively prolong the life-span of tool to lock to this enlarges application scope.

Description

Adjustable hook lock for aviation cabin door

Technical Field

The invention belongs to the field of mechanical locks, and particularly relates to an adjustable hook lock for an aircraft door.

Background

The safe, continuous and stable operation of the aviation equipment is inseparable connected with the quality of the parts, so that the quality level of the aviation parts directly influences the operation level of the aviation equipment, and the product quality problem of the aviation parts is considered to be very necessary.

In order to ensure the safe flight of the airplane, each part on the airplane needs to work reliably from the viewpoint of the airplane body. Aircraft accidents caused by improper surface treatment of parts, insurancless nuts, abrasion, fatigue fracture and the like occur at home and abroad, so that the problems of improper design, manufacture errors, poor maintenance and the like must be avoided for the safety of the aircraft.

The hook lock is used for various medium-sized hatches and hatches of airplanes, can play a role in quick linking, locking, opening and closing, and has the requirements of good tolerance and large load. Hook locks are commonly found in door mechanisms for securing the doors in a position that serves to transfer loads and accommodate deformation, and require that the doors not open in the air even if individual elements of the hook lock fail, thereby interfering with the completion of flight missions and creating safety concerns. Because the hook lock that uses now, can't realize the function of adjusting latch hook length, accommodation is little.

Disclosure of Invention

The invention aims to provide an adjustable hook lock for an aircraft door, which aims to solve the problem that the length of a lock hook of the hook lock cannot be adjusted.

The invention adopts the following technical scheme: an adjustable hook lock for an aviation cabin door comprises a shell and a lock body, wherein the lock body is rotatably connected with one end of the shell through a first torsion spring, two ends of the first torsion spring are respectively abutted against the shell and the lock body, the first torsion spring is used for enabling the shell to rotate relative to the lock body, a trigger piece is installed on the shell through a second torsion spring, two ends of the second torsion spring are respectively abutted against the trigger piece and the shell, the second torsion spring is used for enabling the trigger piece to rotate relative to the shell, and the trigger piece is used for pulling or loosening the lock body to further complete locking or unlocking; the lock body comprises an adjusting mechanism and a lock hook, and the adjusting mechanism is used for adjusting the length of the lock hook.

Further, the casing comprises the apron of body coupling and two first otic placodes, and two long limit border downwardly extending along the apron form two first otic placodes, and two vertical settings of first otic placodes, and set up perpendicularly with the apron run through on two first otic placodes and have all seted up first through-hole, and two first through-holes all are used for installing first dead lever, and first dead lever is used for the cover to establish first torsional spring.

Further, the opening has been seted up on the apron, the opening is used for installing trigger, trigger is located the casing, trigger by a body coupling, and trigger plate and two second otic placodes that top-down set up constitute, trigger the board and suit with the opening of apron, two long limit border downwardly extending along trigger the board form two second otic placodes, two vertical settings of second otic placodes, and with trigger the perpendicular setting of board, run through on two second otic placodes and all seted up the second through-hole, two second through-holes are used for installing the second dead lever, the second dead lever is used for the cover to establish the second torsional spring.

Furthermore, grooves are formed in the lower edges of the two second ear plates; the position of the lock body, which corresponds to the groove, is provided with a hook pin, the size of the hook pin is matched with that of the groove, and the groove is used for the hook pin to extend into, so that the groove pulls or loosens the lock body, and then locking or unlocking is completed.

Further, the casing is inboard, each second otic placode downside still is provided with the cardboard, third through-hole and fourth through-hole have been seted up respectively to the both ends of cardboard, the third through-hole that two cardboards correspond is used for first dead lever to pass, movable mounting has hollow cover between the fourth through-hole that two cardboards correspond, the internal diameter of fourth through-hole is greater than the external diameter of hollow cover, in order to guarantee that hollow cover is portable in the fourth through-hole, hollow cover is used for penetrating fixing bolt, and install casing and hatch door skeleton through this fixing bolt are connected.

Furthermore, the adjusting mechanism is located between the two first ear plates, one end of the adjusting mechanism is connected with the two first ear plates through the first fixing rods, the other end of the adjusting mechanism is connected with the locking hook in a threaded manner, and the adjusting mechanism is used for adjusting the length of the locking hook extending out of the adjusting mechanism.

Furthermore, one end of the lock hook is a hook-shaped end which is hooked on the transverse shaft of the cabin body, the other end of the lock hook is a rod-shaped adjusting end, external threads are arranged on the outer wall of the adjusting end, and the adjusting end is used for extending into the adjusting mechanism and is matched with the internal threads of the adjusting mechanism, so that the length of the hook-shaped end of the lock hook extending out of the adjusting mechanism is adjusted.

Furthermore, the other end of the adjusting mechanism is a hollow frame body, the inner cavity of the frame body is used for accommodating an adjusting nut, the adjusting nut horizontally penetrates through the inner thread, the inner thread of the adjusting nut is matched with the outer thread of the locking hook adjusting end, a fifth through hole is formed in the side face of the frame body close to the locking hook, and the adjusting end of the locking hook, which is used for the fifth through hole, extends into the inner cavity of the frame body.

Furthermore, the frame body and the side face far away from the lock hook are provided with first blind holes, springs and steel balls are sequentially placed in the first blind holes from inside to outside, a plurality of grooves are formed in the side face, close to the first blind holes, of each adjusting nut, when any groove corresponds to the first blind hole, the formed area is used for containing the steel balls, the steel balls are used for clamping the adjusting nuts, and the adjusting nuts are prevented from rotating under the effect of no external force.

Furthermore, a positioning pin is further installed at the adjusting end of the lock hook, a positioning groove is formed in the position, close to the positioning pin, on the outer wall of the frame body and used for enabling the positioning pin to stretch into the positioning groove, the positioning pin is used for preventing the lock hook from being separated from the adjusting mechanism, and the positioning pin is also used for preventing the lock hook from rotating after the lock hook relatively adjusts the outer stress of the nut.

The invention has the beneficial effects that: the length of the lock hook can be adjusted, and the applicability is wide; the length of adjusting the latch hook through setting up adjustment mechanism can adapt to the hatch door of multiple model, can adjust the lock to suitable length in order to reach suitable atress condition according to installation operating mode, can effectively prolong the life-span of tool to lock to this enlarges application scope.

Drawings

FIG. 1 is an isometric view of the present invention in a vertically disposed open position;

FIG. 2 is an isometric view of the present invention in a horizontally disposed open position;

FIG. 3 is a side view of the present invention in the open position;

FIG. 4 is an isometric view of the present invention in a locked condition;

FIG. 5 is a cross-sectional view of the present invention in a locked state;

fig. 6 is a schematic structural diagram of the trigger of the present invention.

Wherein: 1. a housing; 2. a lock body; 3. a second torsion spring; 4. a first torsion spring; 5. a trigger; 6. a cover plate; 7. a first ear plate; 8. a first through hole; 9. a second fixing bar; 10. a dimple; 11. a second ear panel; 12. clamping a plate; 13. a second through hole; 14. a groove; 15. a hollow sleeve; 16. a latch hook; 17. an adjustment mechanism; 18. steel balls; 19. an adjustment end; 20. adjusting the nut; 21. a fifth through hole; 22. an opening; 23. a trigger plate; 24. a first blind hole; 25. a second blind hole; 26. a third through hole; 27. a fourth via hole; 28. a spring; 29. a first fixing lever; 30. a hook pin; 31. positioning pins; 32. and (6) positioning a groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention discloses an adjustable hook lock for an aircraft door, which comprises a shell 1 and a lock body 2, wherein the lock body 2 is rotatably connected with one end of the shell 1 through a first torsion spring 4, two ends of the first torsion spring 4 are respectively abutted against the shell 1 and the lock body 2, specifically, two ends of the first torsion spring 4 are respectively abutted against the lower side of the shell 1 and the upper side of the lock body 2, the first torsion spring 4 is used for rotating the shell 1 relative to the lock body 2, a trigger piece 5 is arranged on the shell 1 through a second torsion spring 3, two ends of the second torsion spring 3 are respectively abutted against the trigger piece 5 and the shell 1, specifically, two ends of the second torsion spring 3 are respectively abutted against the lower side of the trigger piece 5 and the lower side of the shell 1, the second torsion spring 3 is used for rotating the trigger piece 5 relative to the shell 1, and the trigger piece 5 is used for pulling or loosening the lock body 2 to complete locking or unlocking; the lock body 2 comprises an adjusting mechanism 17 and a shackle 16, and the adjusting mechanism 17 is used for adjusting the length of the shackle 16 of the lock body 2.

Lock body 2 rotates through the one end of first torsional spring 4 and casing 1 to be connected, casing 1 uses first torsional spring 4 to rotate as the fulcrum promptly, the hook lock has two kinds of states, locking and open the state promptly, when the locking state, trigger 5 pulls lock body 2, make lock body 2 and trigger 5 apart from nearer, when the open mode, trigger 5 receives under the effect of external force, trigger 5 rotates downwards, loosen lock body 2, casing 1 uses first torsional spring 4 to rotate as the fulcrum, and then trigger 5 is kept away from to lock body 2, lock body 2 is "V" type with casing 1, open the state promptly.

Casing 1 is the strip, and the level sets up, casing 1 comprises apron 6 and two first otic placodes 7, two first otic placodes 7 of long limit border downwardly extending formation along apron 6, two vertical settings of first otic placode 7, and set up perpendicularly with apron 6, run through on two first otic placodes 7 and all seted up first through-hole 8, two first through-holes 8 all are used for installing first dead lever 29, first dead lever 29 is used for the cover to establish first torsion spring 4, the both ends of first torsion spring 4 are supported respectively at 6 downside of apron and 2 upsides of lock body.

Opening 22 has been seted up to apron 6 central point, opening 22 is used for installing trigger 5, trigger 5 is located casing 1, trigger 5 is located the region between two first otic placodes 7 promptly, as shown in fig. 6, trigger 5 comprises trigger plate 23 and two second otic placodes 11 that integrative the connection, and top-down set up, as shown in fig. 4, trigger plate 23 suits with the opening 22 of apron 6, under locking and the state of opening, trigger plate 23 all is the parallel and level with apron 6, guarantee that the equipment surface of installation hook lock all is in the flat state, trigger plate 23 is used for opening the hook lock through pressing.

Two second otic placodes 11 are formed along two long border downwardly extending of trigger plate 23, two vertical settings of second otic placode 11, and set up perpendicularly with trigger plate 23, run through all to have seted up second through-hole 13 on two second otic placodes 11, two second through-holes 13 are used for second dead lever 9 to pass, second torsional spring 3 is established to second dead lever 9 is used for the cover, because trigger 5 needs to use second torsional spring 3 to rotate as the fulcrum, consequently at first need fix whole trigger 5 on casing 1, just can make trigger 5's trigger plate 23 and apron 6 opening 22 mutually support, and then make whole trigger 5 rotate through pressing trigger plate 23, open the hook lock with this.

The grooves 14 are formed in the lower edges of the two second ear plates 11, the hook pins 30 are mounted on the lock body 2 and correspond to the grooves 14, the hook pins 30 are matched with the grooves 14 in size, and the grooves 14 are used for the hook pins 30 to stretch into, so that the grooves 14 pull or loosen the lock body 2, and locking or unlocking is completed. After the trigger plate 23 is pressed by an external force, the trigger plate 23 rotates downwards, so that the two grooves 14 loosen the latch hooks 16, the shell 1 rotates by taking the first torsion spring 4 as a fulcrum, the lock body 2 is far away from the trigger piece 5, and the lock body 2 and the shell 1 are in a V shape, namely an opening state.

As shown in fig. 5, the inside of the casing 1 and the lower side of each second ear plate 11 are provided with clamping plates 12, both ends of each clamping plate 12 are respectively provided with a third through hole 26 and a fourth through hole 27, the third through holes 26 corresponding to the two clamping plates 12 are used for the first fixing rod 29 to pass through, the lock body 2 is connected with the shell 1, the hollow sleeve 15 is movably arranged between the fourth through holes 27 corresponding to the two clamping plates 12, the inner diameter of the fourth through hole 27 is larger than the outer diameter of the hollow sleeve 15, in order to guarantee that hollow cover 15 is portable in fourth through-hole 27, hollow cover 15 is used for penetrating fixing bolt and is connected the installation with casing 1 and hatch door skeleton through this fixing bolt, and hollow cover 15 is a hollow steel pipe, and hollow cover 15 is established in the fourth through-hole 27 that two cardboard 12 correspond, and hollow cover 15 is used for the cover on the installation pole that corresponds aircraft hatch door skeleton to this accomplishes the installation of hook lock.

The two clamping plates 12 are all arranged at the gaps at the two sides of the lock body 2 and the shell 1, the width of the gap is basically consistent with the thickness of the clamping plates 12, the first lug plate 7, the lock body 2 and the clamping plates 12 are connected together through the bushing, because the gap between the first lug plate 7 and the lock body 2 is limited, the gap between the third through hole 26 on the clamping plates 12 and the shaft hole of the bushing is limited, the two clamping plates 12 are kept parallel, the distance between the two clamping plates 12 is fixed, when the hollow sleeve 15 is positioned at the fourth through hole 27 and is placed between the two clamping plates 12, the hollow sleeve 15 is kept axially parallel with the second fixed rod 9, the hollow sleeve 15 is used as an installation hole and is also used as a rotating shaft when the hook lock works, the rotating shaft is kept vertical to the moving track plane in the work of the hook lock, the normal work of the hook lock can be ensured not deviated and not work normally, through arranging the clamping plates 12, the hollow, when the lock body 2 is locked, the shell 2 interferes with the lock body 1, so that the hook pin 30 of the lock body 1 is too far away from the groove 14 to be hung.

The lock body 2 is composed of a lock hook 16 and an adjusting mechanism 17, the adjusting mechanism 17 is located between the two first ear plates 7, one end of the adjusting mechanism 17 is connected with the first ear plates 7 through a first fixing rod 29, the other end of the adjusting mechanism is in threaded connection with the lock hook 16, and the adjusting mechanism 17 is used for adjusting the length of the lock hook 16 extending out of the adjusting mechanism 17. Because the length of the latch hook 16 of the hook lock in the prior art can not be adjusted, the problem of small application range is caused, and the length of the latch hook 16 extending out of the adjusting mechanism 17 can be adjusted through the adjusting mechanism 17, so that the application range of the hook lock is widened.

The hook pin 30 is preferably installed on the adjusting mechanism 17, that is, the hook pin 30 is installed on the adjusting mechanism 17 at a position corresponding to the groove 14, the size of the hook pin 30 is adapted to the size of the groove 14 of the second ear plate 11, the groove 14 is used for the hook pin 30 to extend into, after the trigger plate 23 is pressed by an external force, the trigger plate 23 rotates downwards, so that the grooves 14 of the two second ear plates 11 are turned downwards, the hook pin 30 is disengaged from the groove 14, that is, the trigger piece 5 releases the lock body 2, the housing 1 rotates with the first torsion spring 4 as a fulcrum, the lock body 2 is far away from the trigger piece 5, the lock body 2 and the housing 1 are in a "V" shape, that is, an open state, when the hook lock is required to be locked, the housing 1 rotates with the first torsion spring 4 as a fulcrum by pressing the cover plate 6, slowly approaches the trigger piece 5, and then the hook pin 30 extends into the groove 14, so that the hook lock is locked.

Because according to the requirement of the elasticity after the aircraft hatch door and the fuselage are closed, too loose can not play the locking effect, the locking hook has the clearance with the locking lever on the fuselage, produces the collision when the flight is jolted, and long-time collision takes place to throw off or the danger of damaging, and too tight is unfavorable for opening and close the hatch door, and the long-time atress of locking hook produces fatigue and takes place the danger of destruction from the face. It is therefore necessary to adjust the hook length of the hook lock. As shown in fig. 4, one end of the locking hook 16 is a hook-shaped end for hooking on the lateral axis of the cabin, the other end is a rod-shaped adjusting end 19, the outer wall of the adjusting end 19 is provided with an external thread, the adjusting end 19 is used for extending into the adjusting mechanism 17 and is matched with the internal thread of the adjusting mechanism 17, and the length of the hook-shaped end of the locking hook 16 extending out of the adjusting mechanism 17 is adjusted by screwing in or screwing out the adjusting mechanism 17.

The other end of adjustment mechanism 17 is hollow framework, the framework inner chamber is used for holding adjusting nut 20, adjusting nut 20 level is run through and is seted up there is the internal thread, adjusting nut 20's internal thread and the external screw thread of adjusting end 19 mutually support, the framework, the side that is close to latch hook 16 has seted up fifth through-hole 21, fifth through-hole 21 is used for the adjusting end 19 of latch hook 16 to stretch into the framework inner chamber, and mutually support with adjustment mechanism 17's internal thread, through the screw-in or screw-out adjustment mechanism 17, and then the length that adjustment mechanism 17 was stretched out to the hook-shaped end of adjusting latch hook 16. After the adjusting nut 20 is arranged in this way, the external thread of the adjusting end 19 of the locking hook 16 is matched with the internal thread of the adjusting nut 20 through manual twisting, if the locking hook 16 needs to be adjusted to be longer, the adjusting nut 20 only needs to be twisted forward to enable the adjusting end 19 of the locking hook 16 to extend out, if the locking hook 16 needs to be adjusted to be shorter, the adjusting nut 20 only needs to be twisted backward to enable the adjusting end 19 of the locking hook 16 to retract, and then the purpose of adjusting the length of the locking hook 16 is achieved.

The side surface of the frame body, which is far away from the lock hook 16, is provided with a first blind hole 24, the first blind hole 24 is sequentially provided with a spring 28 and a steel ball 18 from inside to outside, the side surface of the adjusting nut 20, which is close to the first blind hole 24, is provided with a plurality of concave grooves 10, when any concave groove 10 corresponds to the first blind hole 24, a formed area is used for accommodating the steel ball 18, the steel ball 18 is used for clamping the adjusting nut 20, the steel ball 18 is used for avoiding the locking hook loosening caused by the self-rotation of the adjusting nut 20 due to bumping and shaking, and the steel ball 18 is always kept in the concave groove 10 due to the acting force of the spring 28 and cannot be extruded back into the first blind hole 24 due to bumping and shaking, only when the extrusion force generated when the adjusting nut 20 is manually rotated is larger than the elastic force of the spring 28, the steel ball 18 retracts, the adjusting nut 20 is rotated, and only when the adjustment is really needed, the steel ball 18 is enabled to be extruded from the, and the rolling ball rolls into another area formed by matching one adjacent concave groove 10 with the first blind hole 24 to complete one-time adjustment, and the rolling ball can rotate by different angles according to requirements and have different adjustment lengths.

A plurality of second blind holes 25 have evenly been seted up around adjusting nut 20 outer wall a week, and a plurality of second blind holes 25 are used for adjusting the in-process and exert the moment of torsion for adjusting nut 20 is rotatory, stretch into in second blind hole 25 through specialized tool promptly, stir adjusting nut 20 and rotate, and then adjust the length that locking hook 16 of lock body 2 stretches out adjustment mechanism 17 framework.

The adjusting end 19 of the locking hook 16 is further provided with a positioning pin 31, a positioning groove 32 is formed in the outer wall of the frame body at a position close to the positioning pin 31, the positioning groove 32 is horizontally formed, the positioning groove 32 is used for the positioning pin 31 to extend into, the depth of the positioning groove 32 is the adjustable length of the locking hook 16, namely, the positioning pin 31 moves horizontally in the positioning groove 32 along with the rotation of the adjusting nut 20, the locking hook 16 moves horizontally, the length of the locking hook 16 extending out of the frame body is adjusted, and the positioning pin 31 is used for preventing the locking hook 16 from being separated from the adjusting mechanism 17 and preventing the locking hook 16 from rotating after being externally stressed.

When setting up adjusting nut 20 and latch hook 16 after, because adjusting nut 20 and latch hook 16's regulation end 19 all is located the frame, can't look over with the naked eye, whether the regulation end 19 of latch hook 16 has arrived the limit, the condition that adjusting nut 20 was deviate from completely to the regulation end 19 of latch hook 16 takes place easily, cause the misoperation, consequently, can avoid the emergence of this type of accident through setting up locating pin 31 and constant head tank 32, in case adjusting nut 20 rotates to when adjusting nut 16's regulation end 19 is about to deviate from adjusting nut 20, locating pin 31 just blocks in the innermost side of constant head tank 32, and then withstands latch hook 16, make adjusting end 19 of latch hook 16 can't continue to deviate from, constant head tank 32 can also prevent that latch hook 16 from carrying out the rotation simultaneously.

In the invention, a shell 1 is arranged on a cabin door framework, a hollow sleeve 15 is parallel to a cabin door, a lock hook 16 is hooked on a transverse shaft of a cabin body opposite to the cabin door, when the cabin door is used, a trigger plate 23 is pressed to enable a hook pin 30 to be disengaged from a groove 14, then the shell 1 rotates by taking a first torsion spring 4 as a fulcrum and pops out in a direction far away from the cabin body, then the shell 1 is pulled in a direction far away from the cabin body, so that a lock body 2 also rotates in a small angle in a direction far away from the cabin body by using the axis of the hollow sleeve, and then the lock hook 16 is disengaged from the transverse shaft of the cabin body to; otherwise the hatch door is locked.

Claims

1. The adjustable hook lock for the aircraft cabin door is characterized by comprising a shell (1) and a lock body (2), wherein the lock body (2) is rotatably connected with one end of the shell (1) through a first torsion spring (4), two ends of the first torsion spring (4) respectively abut against the shell (1) and the lock body (2), the first torsion spring (4) is used for rotating the shell (1) relative to the lock body (2), a trigger piece (5) is installed on the shell (1) through a second torsion spring (3), two ends of the second torsion spring (3) respectively abut against the trigger piece (5) and the shell (1), the second torsion spring (3) is used for rotating the trigger piece (5) relative to the shell (1), and the trigger piece (5) is used for pulling or loosening the lock body (2) so as to complete locking or unlocking; the lock body (2) comprises an adjusting mechanism (17) and a lock hook (16), wherein the adjusting mechanism (17) is used for adjusting the length of the lock hook (16).

2. The adjustable hook lock for the aircraft door according to claim 1, wherein the housing (1) is composed of a cover plate (6) and two first ear plates (7) which are integrally connected, two first ear plates (7) are formed by extending downwards along two long edges of the cover plate (6), the two first ear plates (7) are vertically arranged and are vertically arranged with the cover plate (6), two first through holes (8) are formed in the first ear plates (7) in a penetrating manner, the two first through holes (8) are used for installing first fixing rods (29), and the first fixing rods (29) are used for sleeving first torsion springs (4).

3. The adjustable hook lock for the aircraft door according to claim 2, wherein the cover plate (6) is provided with an opening (22), the opening (22) is used for installing the trigger (5), the trigger (5) is located in the housing (1), the trigger (5) is composed of a trigger plate (23) and two second ear plates (11) which are integrally connected and arranged from top to bottom, the trigger plate (23) is adapted to the opening (22) of the cover plate (6), two second ear plates (11) are formed by extending downwards along two long edges of the trigger plate (23), the two second ear plates (11) are vertically arranged and arranged perpendicular to the trigger plate (23), the two second ear plates (11) are respectively provided with a second through hole (13) in a penetrating manner, and the two second through holes (13) are used for installing a second fixing rod (9), the second fixing rod (9) is used for sleeving the second torsion spring (3).

4. An adjustable hook lock for aircraft doors according to claim 3, characterised in that the lower edges of said second ear plates (11) are provided with recesses (14); the lock is characterized in that a hook pin (30) is mounted at the position, corresponding to the groove (14), on the lock body (2), the size of the hook pin (30) is matched with that of the groove (14), the groove (14) is used for the hook pin (30) to stretch into, so that the groove (14) is pulled or loosened to the lock body (2), and then locking or unlocking is completed.

5. The adjustable hook lock for the aircraft door according to claim 3, wherein a clamping plate (12) is further arranged on the inner side of the casing (1) and on the lower side of each second lug plate (11), third through holes (26) and fourth through holes (27) are respectively formed in two ends of the clamping plate (12), the third through holes (26) corresponding to the two clamping plates (12) are used for a first fixing rod (29) to pass through, a hollow sleeve (15) is movably arranged between the fourth through holes (27) corresponding to the two clamping plates (12), the inner diameter of each fourth through hole (27) is larger than the outer diameter of each hollow sleeve (15) so as to ensure that each hollow sleeve (15) can move in each fourth through hole (27), and each hollow sleeve (15) is used for penetrating through a fixing bolt and connecting and installing the casing (1) and a door framework through the fixing bolt.

6. An adjustable hook lock for an aircraft door according to any one of claims 1 to 5, characterized in that the adjustment mechanism (17) is located between the two first ear plates (7) and is interconnected at one end to the two first ear plates (7) by a first fixing rod (29) and at the other end in threaded connection with the locking hook (16), the adjustment mechanism (17) being adapted to adjust the length of the locking hook (16) extending beyond the adjustment mechanism (17).

7. The adjustable hook lock for aircraft doors according to claim 6, characterized in that the locking hook (16) has one end being a hook-shaped end for hooking on the lateral axis of the cabin and the other end being a rod-shaped adjusting end (19), the outer wall of the adjusting end (19) being provided with external threads, the adjusting end (19) being adapted to extend into the adjusting mechanism (17) and to cooperate with the internal threads of the adjusting mechanism (17) to adjust the length of the hook-shaped end of the locking hook (16) extending out of the adjusting mechanism (17).

8. The adjustable hook lock for the aircraft door according to claim 7, wherein the other end of the adjusting mechanism (17) is a hollow frame, an inner cavity of the frame is used for accommodating an adjusting nut (20), the adjusting nut (20) horizontally penetrates through and is provided with an internal thread, the internal thread of the adjusting nut (20) is matched with an external thread of an adjusting end (19) of the locking hook (16), a side surface of the frame, which is close to the locking hook (16), is provided with a fifth through hole (21), and the fifth through hole (21) is used for the adjusting end (19) of the locking hook (16) to extend into the inner cavity of the frame.

9. The adjustable hook lock for the aircraft door according to claim 8, wherein a first blind hole (24) is formed in the frame body and the side surface far away from the lock hook (16), a spring (28) and a steel ball (18) are sequentially placed in the first blind hole (24) from inside to outside, a plurality of recesses (10) are formed in the adjusting nut (20) and the side surface close to the first blind hole (24), when any one of the recesses (10) corresponds to the first blind hole (24), the formed area is used for containing the steel ball (18), the steel ball (18) is used for clamping the adjusting nut (20), and the adjusting nut (20) is prevented from rotating under the effect of no external force.

10. The adjustable hook lock for the aircraft door according to any one of claims 6 to 9, wherein a positioning pin (31) is further installed at the adjusting end (19) of the locking hook (16), a positioning groove (32) is formed in the outer wall of the frame body at a position close to the positioning pin (31), the positioning groove (32) is used for the positioning pin (31) to extend into, the positioning pin (31) is used for preventing the locking hook (16) from being separated from the adjusting mechanism (17) and preventing the locking hook (16) from rotating after being externally stressed relative to the adjusting nut (20).