A hook lock for an aircraft engine cowl

Abstract

The present invention discloses a hook lock for an aircraft engine cover, comprising: a strip-shaped mounting ear plate, on the right side of which there are a first through hole and a second through hole; a trigger member, the lower side of which is hook-shaped; a lock body, the right end of which is rotationally connected to the right end of the strip-shaped mounting ear plate through a first torsion spring, a movement hole is horizontally formed in the middle of the lock body; a lock hook, the rod-shaped end of which is connected to the left end of the lock body; a fixing ring, which is sleeved in the movement hole and arranged in the front-rear direction, and both ends of which extend out of the movement hole, and the fixing ring is used to mount the lock body on the engine nacelle; a pulling mechanism, the upper end of which is connected to the strip-shaped mounting ear plate through the first through hole and the second through hole, and the left end of which is sleeved on both ends of the fixing ring, and is used for, when unlocking, after the trigger member releases the lock body, the lock body moves leftward along the movement hole to complete unlocking; the movement stroke of the present invention is large, and the length can be adjusted by an adjusting nut, the locking operation is simple, and the workload of maintenance personnel is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the field of aircraft peripheral parts, and particularly relates to a hook lock for an aircraft engine cover. Background Art

[0002] Hook locks are used on various medium-sized hatches and cabin doors of aircraft, which can play the roles of quick connection, locking, opening, and closing, and are required to have good tolerance and large load. Hook locks are commonly present in the cabin door mechanism, used to fix the cabin door in a certain position, play the roles of transmitting load and adjusting deformation, and it is required that even if individual components of the hook lock fail, the cabin door will not open in the air, thus affecting the completion of the flight mission and causing safety problems. Since the working stroke of the currently used hook lock is relatively small, manual assistance is required for locking when connecting the left and right cabin doors of the engine cover. When assisting in locking, an auxiliary locking tool needs to be used to reduce the gap between the left and right cabin doors to the working stroke of the hook lock to complete the locking function of the hook lock. The manual operation is difficult, the time required for airframe maintenance is long, it cannot be well adapted to medium-sized hatches and cabin doors, and the locking operation is cumbersome, greatly increasing the workload of maintenance personnel. Summary of the Invention

[0003] The purpose of the present invention is to provide a hook lock for an aircraft engine cover to solve the problems of the relatively small stroke and cumbersome locking operation of the existing hook locks.

[0004] The present invention adopts the following technical solutions: A hook lock for an aircraft engine cover, comprising:

[0005] A strip-shaped mounting ear plate, arranged in the left-right direction, and having a first through hole and a second through hole opened on its right side.

[0006] A trigger member, installed in the middle of the strip-shaped mounting ear plate, and having a hook shape on its lower side.

[0007] A lock body, which is strip-shaped, located below the strip-shaped mounting ear plate, and is used to be hooked or released by the trigger member for locking or unlocking. Its right end is rotationally connected to the right end of the strip-shaped mounting ear plate through a first torsion spring. The two ends of the first torsion spring respectively abut on the strip-shaped mounting ear plate and the lock body, and are used to provide an opening force for the left end of the strip-shaped mounting ear plate to rotate up and down relative to the lock body. A movement hole is horizontally opened in the middle of the lock body.

[0008] A lock hook, one end of which is a hook end and the other end is a rod end. Its rod end is connected to the left end of the lock body, and its hook end is used to hook the lock rod in the inner cavity of the cabin.

[0009] A fixing ring, sleeved in the movement hole and arranged in the front-rear direction, with both ends extending out of the movement hole. The fixing ring is used to install the lock body on the cabin.

[0010] A pulling mechanism, whose upper end is connected to a strip-shaped mounting ear plate through a first through hole and a second through hole, and whose left end is sleeved on both ends of a fixed ring, is used to trigger the lock body to move leftward along a movement hole to complete unlocking after the triggering member releases the lock body when unlocking.

[0011] Further, the pulling mechanism includes:

[0012] Two dial plates, respectively located on the front side and the rear side of the lock body, whose right ends are connected to the strip-shaped mounting ear plate through a first through hole, and whose left ends are connected to the strip-shaped mounting ear plate through a second through hole.

[0013] Two clamping plates, respectively located on the front side and the rear side of the lock body, the left ends of each clamping plate are respectively sleeved on the front side and the rear side of the fixed ring, and the right ends of both are hinged to the left ends of the dial plates.

[0014] When unlocking, each clamping plate is used to: press the triggering member to rotate it and release the lock body, the left end of the strip-shaped mounting ear plate rotates upward to push the dial plate to move leftward, and drives the lock body to move leftward along the movement hole through the dial plate, so that the lock hook releases the lock rod in the cabin cavity to complete unlocking.

[0015] Further, an adjustment hole is vertically penetrated and opened on the left side of the lock body, and it further includes:

[0016] An adjusting nut, located in the adjustment hole, the rod-shaped end of the lock hook passes through the left side wall of the lock body and is threadedly connected to the adjusting nut, thereby adjusting the length of the lock hook extending outside the lock body.

[0017] Further, a plurality of concave pits are opened on the right side wall of the adjusting nut, and each concave pit is used to cooperate with a spring and a positioning pin to limit the rotation of the adjusting nut.

[0018] Further, the strip-shaped mounting ear plate is composed of a cover plate and two receiving ear plates connected integrally. Two receiving ear plates are formed by extending downward along the front side and the rear side edges of the cover plate. The two receiving ear plates are vertically arranged and perpendicular to the cover plate, and the area between the two receiving ear plates is used to receive the right end of the lock body.

[0019] Further, it further includes: a rotating rod, running in the front-rear direction, sleeved in the first through hole of the strip-shaped mounting ear plate, a first torsion spring is sleeved on the middle of the rotating rod, and both ends of the rotating rod respectively pass through the right ends of the dial plates and are stuck between the two receiving ear plates.

[0020] Further, an opening is opened on the cover plate, the triggering member is located in the opening, the triggering member is composed of a triggering plate and two triggering ear plates connected integrally and arranged from top to bottom. Two triggering ear plates are formed by extending downward along the two edges of the triggering plate. The two triggering ear plates are vertically arranged and perpendicular to the triggering plate. A second torsion spring is arranged between the two triggering ear plates. The lower ends of the two triggering ear plates are hook-shaped. The second torsion spring is used to drive the triggering plate to rotate, thereby hooking or releasing the lock body to complete locking and unlocking.

[0021] Further, hook pins are installed on the lock body at positions corresponding to the lower ends of the two trigger ear plates. The two hook pins are used to be hooked by the lower ends of the two trigger ear plates to lock the lock body.

[0022] Further, a first rod body and a second rod body are arranged between the left ends of the two dial plates. The first rod body and the second rod body are arranged in the front-rear direction. The front ends of the first rod body and the second rod body are fixedly connected to the front dial plate, and the rear ends are fixedly connected to the rear dial plate. The first rod body is above and the second rod body is below.

[0023] A third torsion spring is sleeved on the first rod body. The upper end of the third torsion spring abuts against the lower side of the strip-shaped mounting ear plate, and its lower end abuts against the first rod body. The third torsion spring is used to press the dial plate tightly.

[0024] The beneficial effects of the present invention are as follows: The present invention is installed on the medium-sized hatch and cabin door of the aircraft. After pressing the trigger member from the locked state to the popped-up state, unlocking is completed by manual force application. When locking, press the left end of the strip-shaped mounting ear plate until the trigger member hooks the lock body to complete locking. The present invention has a large movement stroke and can adjust the length by adjusting the nut. The locking operation is simple, greatly reducing the workload of maintenance personnel. It can realize the quick opening and closing of the aircraft cabin door, can adjust the protruding distance of the lock hook according to the interface size, is easy to operate, has a large load-bearing capacity, and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention in the locked state;

[0026] Figure 2 is a schematic structural diagram of the present invention in the unlocked state;

[0027] Figure 3 is an exploded view of the present invention.

[0028] Wherein: 1. Strip-shaped mounting ear plate; 2. Trigger member; 3. First through hole; 4. Second through hole; 5. Lock body; 6. First torsion spring; 7. Movement hole; 8. Lock hook; 9. Hook-shaped end; 10. Rod-shaped end; 11. Fixed ring; 12. Dial plate; 13. Clamping plate; 14. Adjusting hole; 15. Adjusting nut; 17. Cover plate; 18. Receiving ear plate; 19. Rotating rod; 20. Trigger plate; 21. Trigger ear plate; 22. Second torsion spring; 23. Hook pin; 25. First rod body; 26. Second rod body; 27. Third torsion spring. DETAILED DESCRIPTION OF THE INVENTION

[0029] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0030] The present invention discloses a hook lock for an aircraft engine cover, as Figures 1-3As shown, it includes a strip-shaped mounting ear plate 1, a trigger 2, a lock body 5, a lock hook 8, a fixing ring 11, and a pulling mechanism.

[0031] The strip-shaped mounting ear plate 1 is arranged in the left-right direction. A first through hole 3 and a second through hole 4 are provided on the right side of the strip-shaped mounting ear plate 1. The trigger 2 is installed in the middle of the strip-shaped mounting ear plate 1. The lower side of the trigger 2 is hook-shaped. The lock body 5 is strip-shaped and is located below the strip-shaped mounting ear plate 1. The lock body 5 is used to be hooked or released by the trigger 2 for locking or unlocking. The right end of the lock body 5 is rotatably connected to the right end of the strip-shaped mounting ear plate 1 through a first torsion spring 6. The two ends of the first torsion spring 6 respectively abut on the strip-shaped mounting ear plate 1 and the lock body 5, and are used to provide an opening force for the left end of the strip-shaped mounting ear plate 1 to rotate up and down relative to the lock body 5. A movement hole 7 is horizontally opened in the middle of the lock body 5.

[0032] The "direction" in the present invention is described based on the direction of the present invention in the locked state. When the present invention is in the unlocked state, the direction of the strip-shaped mounting ear plate 1 will change, that is, the direction of the strip-shaped mounting ear plate 1 changes from the left-right direction to the up-down direction.

[0033] One end of the lock hook 8 is a hook-shaped end 9, and the other end of the lock hook 8 is a rod-shaped end 10. The rod-shaped end 10 of the lock hook 8 is connected to the left end of the lock body 5. The hook-shaped end 9 of the lock hook 8 is used to hook the lock rod in the inner cavity of the engine room. The fixing ring 11 is sleeved in the movement hole 7 and is arranged in the front-back direction. The two ends of the fixing ring 11 extend out of the movement hole 7. The fixing ring 11 is used to install the lock body 5 on the engine room.

[0034] The upper end of the pulling mechanism is connected to the strip-shaped mounting ear plate 1 through the first through hole 3 and the second through hole 4. The left end of the pulling mechanism is sleeved on the two ends of the fixing ring 11. The pulling mechanism is used to, when unlocking, after the trigger 2 releases the lock body 5, the lock body 5 moves leftward along the movement hole 7 to complete unlocking.

[0035] The pulling mechanism includes: two dial plates 12 and two clamping plates 13. The two dial plates 12 are respectively located on the front side and the rear side of the lock body 5. The right ends of the two dial plates 12 are connected to the strip-shaped mounting ear plate 1 through the first through hole 3. The left ends of the two dial plates 12 are connected to the strip-shaped mounting ear plate 1 through the second through hole 4. The two clamping plates 13 are respectively located on the front side and the rear side of the lock body 5. The left ends of the respective clamping plates 13 are respectively sleeved on the front side and the rear side of the fixing ring 11. The right ends of the two clamping plates 13 are both hinged to the left ends of the dial plates 12.

[0036] When each clamping plate 13 is used for unlocking: Press the trigger member 2 to rotate it and release the lock body 5. The left end of the strip-shaped mounting ear plate 1 rotates upward to push the dial plate 12 to move leftward, and drives the lock body 5 to move leftward along the movement hole 7 through the dial plate 12, so that the lock hook 8 releases the lock rod in the cabin cavity to complete unlocking; when unlocking, the left end of the strip-shaped mounting ear plate 1 rotates upward, and pushes the right end of the dial plate 12 to move leftward, thereby driving the right end of the clamping plate 13 to move upward, forcing the right end of the dial plate 12 to approach the left end of the clamping plate 13, and further forcing the lock body 5 to move leftward to complete unlocking. By providing the movement hole 7 in the present invention, the lock body 5 moves along the movement hole 7 during the unlocking and locking processes, thereby increasing the movement stroke.

[0037] An adjustment hole 14 is vertically penetrated and opened on the left side of the lock body 5. The present invention further includes an adjustment nut 15. The adjustment nut 15 is located in the adjustment hole 14. The rod-shaped end 10 of the lock hook 8 passes through the left side wall of the lock body 5 and is threadedly connected to the adjustment nut 15, thereby adjusting the length of the lock hook 8 extending outside the lock body 5. A plurality of concave pits are opened on the right side wall of the adjustment nut 15. Each concave pit is used to cooperate with a spring and a positioning pin to limit the rotation of the adjustment nut 15.

[0038] The strip-shaped mounting ear plate 1 is composed of a cover plate 17 and two receiving ear plates 18 connected integrally. Two receiving ear plates 18 are formed by extending downward along the front and rear side edges of the cover plate 17. The two receiving ear plates 18 are vertically arranged and perpendicular to the cover plate 17. The areas of the two receiving ear plates 18 are used to receive the right end of the lock body 5.

[0039] The present invention further includes: a rotating rod 19. The rotating rod 19 extends in the front and rear directions. The rotating rod 19 is sleeved in the first through hole 3 of the strip-shaped mounting ear plate 1. The first torsion spring 6 is sleeved in the middle of the rotating rod 19. The two ends of the rotating rod 19 respectively pass through the right end of the dial plate 12 and are clamped between the two receiving ear plates 18.

[0040] An opening is provided on the cover plate 17 for installing the trigger member 2. The trigger member 2 is located in the opening. The trigger member 2 is composed of a trigger plate 20 and two trigger ear plates 21 connected integrally and arranged from top to bottom. Two trigger ear plates 21 are formed by extending downward along the two edges of the trigger plate 20. The two trigger ear plates 21 are vertically arranged and perpendicular to the trigger plate 20. A second torsion spring 22 is arranged between the two trigger ear plates 21. The lower ends of the two trigger ear plates 21 are hook-shaped. The second torsion spring 22 is used to drive the trigger plate 20 to rotate, thereby hooking or releasing the lock body 5 to complete locking and unlocking.

[0041] Hook pins 23 are installed on the lock body 5 at positions corresponding to the lower ends of the two trigger ear plates 21. The two hook pins 23 are used to be hooked by the lower ends of the two trigger ear plates 21 to lock the lock body 5, so as to prevent accidental unlocking.

[0042] A first rod 25 and a second rod 26 are arranged between the left ends of the two dial plates 12. The first rod 25 and the second rod 26 are arranged in the front-rear direction. The front ends of the first rod 25 and the second rod 26 are fixedly connected to the front dial plate 12, and the rear ends are fixedly connected to the rear dial plate 12. The first rod 25 is above and the second rod 26 is below. A third torsion spring 27 is sleeved on the first rod 25. The upper end of the third torsion spring 27 abuts against the lower side of the strip-shaped mounting ear plate 1, and its lower end abuts against the first rod 25. The third torsion spring 27 is used to press tightly against the dial plate 12.

[0043] The unlocking process of the present invention is as follows:

[0044] Press the trigger 2. The hook-shaped lower end of the trigger 2 releases the hook pin 23. The left end of the strip-shaped mounting ear plate 1 rotates upward, thereby forcing the right end of the dial plate 12 to move leftward, and the left end of the dial plate 12 to move upward, thereby driving the right end of the clamping plate 13 to move upward, making the dial plate 12 approach the fixed ring 11, and forcing the lock body 5 to move leftward to complete unlocking.

[0045] The locking process of the present invention is as follows:

[0046] Press the left end of the strip-shaped mounting ear plate 1 to rotate downward, so that the right end of the dial plate 12 moves rightward, the left end moves downward, and the right end of the clamping plate 13 moves downward, increasing the distance between the left end of the clamping plate 13 and the right end of the dial plate 12. Then, the lock body 5 moves rightward along the movement hole 7 until the lower end of the trigger 2 hooks the hook pin 23 to complete locking.

[0047] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hook lock for an aircraft engine cowl, characterized in that, Comprising: A strip-shaped mounting ear plate (1) arranged in the left-right direction, with a first through hole (3) and a second through hole (4) opened on its right side, A trigger member (2) installed in the middle of the strip-shaped mounting ear plate (1), with a hook-shaped lower side, A lock body (5) which is strip-shaped and located below the strip-shaped mounting ear plate (1), used to be hooked or released by the trigger member (2) for locking or unlocking. Its right end is rotationally connected to the right end of the strip-shaped mounting ear plate (1) through a first torsion spring (6). The two ends of the first torsion spring (6) respectively abut on the strip-shaped mounting ear plate (1) and the lock body (5), and are used to provide an opening force for the left end of the strip-shaped mounting ear plate (1) to rotate up and down relative to the lock body (5). A movement hole (7) is horizontally opened in the middle of the lock body (5), A lock hook (8), one end of which is a hook-shaped end (9) and the other end is a rod-shaped end (10). Its rod-shaped end (10) is connected to the left end of the lock body (5), and its hook-shaped end (9) is used to hook the lock rod in the inner cavity of the engine room, A fixing ring (11) sleeved in the movement hole (7) and arranged in the front-back direction, with both ends extending out of the movement hole (7). The fixing ring (11) is used to mount the lock body (5) to the engine room, A pulling mechanism, the upper end of which is connected to the strip-shaped mounting ear plate (1) through the first through hole (3) and the second through hole (4), and the left end of which is sleeved on both ends of the fixing ring (11), used to, when unlocking, after the trigger member (2) releases the lock body (5), the lock body (5) moves leftward along the movement hole (7) to complete unlocking; The pulling mechanism includes: Two dial plates (12) respectively located on the front side and the rear side of the lock body (5), the right ends of which are connected to the strip-shaped mounting ear plate (1) through the first through hole (3), and the left ends of which are connected to the strip-shaped mounting ear plate (1) through the second through hole (4), Two clamping plates (13) respectively located on the front side and the rear side of the lock body (5). The left ends of the clamping plates (13) are respectively sleeved on the front side and the rear side of the fixing ring (11), and the right ends of both are hinged to the left ends of the dial plates (12), Each clamping plate (13) is used for unlocking: pressing the trigger member (2) to make it rotate and release the lock body (5), the left end of the strip-shaped mounting ear plate (1) rotates upward to push the dial plate (12) to move leftward, and drives the lock body (5) to move leftward along the movement hole (7) through the dial plate (12), so that the lock hook (8) releases the lock rod in the inner cavity of the engine room to complete unlocking.

2. The hook lock for an aircraft engine cowl according to claim 1, characterized in that, An adjusting hole (14) is vertically penetrated and opened on the left side of the lock body (5), and further includes: An adjusting nut (15) located in the adjusting hole (14). The rod-shaped end (10) of the lock hook (8) passes through the left side wall of the lock body (5) and is threadedly connected to the adjusting nut (15), thereby adjusting the length of the lock hook (8) extending out of the lock body (5).

3. The hook lock for an aircraft engine cover according to claim 2, characterized in that, A plurality of concave pits are opened on the right side wall of the adjusting nut (15), and each concave pit is used to cooperate with a spring and a positioning pin to limit the rotation of the adjusting nut (15).

4. A hook lock for an aircraft engine cover according to any one of claims 1-3, characterized in that, The strip-shaped mounting ear plate (1) is composed of a cover plate (17) and two receiving ear plates (18) integrally connected. Two receiving ear plates (18) are formed by extending downward along the front and rear side edges of the cover plate (17). The two receiving ear plates (18) are vertically arranged and perpendicular to the cover plate (17). The areas of the two receiving ear plates (18) are used to receive the right end of the lock body (5).

5. The hook lock for an aircraft engine cover according to claim 4, characterized in that, It further includes: A rotating rod (19) runs in the front-back direction and is sleeved in the first through hole (3) of the strip-shaped mounting ear plate (1). The first torsion spring (6) is sleeved in the middle of the rotating rod (19). The two ends of the rotating rod (19) respectively pass through the right end of the dial plate (12) and are clamped between the two receiving ear plates (18).

6. The hook lock for an aircraft engine cover according to claim 4, characterized in that, An opening is formed in the cover plate (17). The trigger member (2) is located in the opening. The trigger member (2) is composed of a trigger plate (20) and two trigger ear plates (21) integrally connected and arranged from top to bottom. Two trigger ear plates (21) are formed by extending downward along the two edges of the trigger plate (20). The two trigger ear plates (21) are vertically arranged and perpendicular to the trigger plate (20). A second torsion spring (22) is arranged between the two trigger ear plates (21). The lower ends of the two trigger ear plates (21) are hook-shaped. The second torsion spring (22) is used to drive the trigger plate (20) to rotate, thereby hooking or releasing the lock body (5) to complete locking and unlocking.

7. The hook lock for an aircraft engine cowl according to claim 6, characterized in that, Hook pins (23) are installed on the lock body (5) at positions corresponding to the lower ends of the two trigger ear plates (21). The two hook pins (23) are used to be hooked by the lower ends of the two trigger ear plates (21) to lock the lock body (5).

8. A hook lock for an aircraft engine cowl according to claim 1, characterized in that, A first rod body (25) and a second rod body (26) are arranged between the left ends of the two dial plates (12). The first rod body (25) and the second rod body (26) are arranged in the front-back direction. The front ends of the first rod body (25) and the second rod body (26) are fixedly connected to the front dial plate (12), and the rear ends are fixedly connected to the rear dial plate (12). The first rod body (25) is above and the second rod body (26) is below. A third torsion spring (27) is sleeved on the first rod body (25). The upper end of the third torsion spring (27) abuts against the lower side of the strip-shaped mounting ear plate (1), and its lower end abuts against the first rod body (25). The third torsion spring (27) is used to press the dial plate (12).

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