Large hook lock for aircraft engine cowling

Abstract

The application discloses a large hook lock for airplane engine cover, which comprises a pull rod, a left end of which is hook-shaped and used for hooking on a locking bolt on the inner side of a left anti-thrust device fairing of an airplane, a strip-shaped sliding hole is formed on the right half of the pull rod along the direction of the pull rod, the sliding hole is used for a step pin of a right anti-thrust device fairing to extend from front to back and fix the hook lock on the inner side of the right anti-thrust device fairing, and the sliding hole is used for the pull rod to move left and right when the hook lock is opened and closed, a connecting rod, a right end of which is hinged to a right end of the pull rod, a connecting plate, a right end of which is hinged to a left end of the connecting rod, a rocker arm, which is strip-shaped, a left end of which is hinged to a left end of the connecting plate, and a lock hook, which is fixed on the middle part of the rocker arm and used for hooking on a right end of the connecting rod when the hook lock is closed.

Description

TECHNICAL FIELD

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

[0002] Hook locks are commonly used in cabin door mechanisms and are connected with lock rods installed inside the aircraft body to fix the left and right cabin doors at a certain position and play a role in load transmission and deformation adjustment. The hook locks used in the cabin door body at present are basically composed of a handle, a trigger, a lock hook, and a mounting sleeve, and the maintenance personnel completes the unlocking action by pressing the trigger and then rotating the handle. The hook lock is generally installed outside the nacelle.

[0003] In order to ensure the tightness of the connection between the left and right cabin doors, a locking mechanism is also required inside the nacelle. However, due to the dense arrangement of equipment and pipelines inside the nacelle and the relatively small space, the existing hook lock for the aircraft engine cover has the problems of small size, long stroke, large opening and closing angle, high space occupation rate, and low strength, which cannot meet the use requirements. SUMMARY

[0004] The purpose of the present application is to provide a large hook lock for an aircraft engine cover, which has large size, long stroke, small opening and closing angle, and low space occupation rate.

[0005] The present application adopts the following technical scheme: a large hook lock for an aircraft engine cover, comprising:

[0006] A pull rod, the left end of which is hook-shaped and used for hooking on a locking bolt on the inner side of the left thrust reverser cowl of the aircraft, a strip-shaped sliding hole is formed on the right half of the pull rod along the direction of the pull rod, the sliding hole is used for the step pin of the right thrust reverser cowl to extend from front to back and fix the hook lock on the inner side of the right thrust reverser cowl, and the pull rod moves left and right when unlocking and locking,

[0007] A connecting rod, the right end of which is hinged to the right end of the pull rod,

[0008] A connecting plate, the right end of which is hinged to the left end of the connecting rod,

[0009] A rocker arm, which is strip-shaped, the left end of which is hinged to the left end of the connecting plate,

[0010] A lock hook, which is fixed to the middle part of the rocker arm and used for hooking on the right end of the connecting rod when locking,

[0011] In the locking state, the right end of the rocker arm is used to receive upward thrust to make the lock hook release the connecting rod, and the right end of the rocker arm is also used to receive downward thrust to move downward, thereby pulling the connecting rod to move to the right and downward through the connecting plate, and the pull rod is used to move left along the sliding hole to make the left end of the pull rod release the locking bolt to complete unlocking.

[0012] Further, it also comprises:

[0013] An extension rod, the right end of which is hinged to the right end of the rocker arm and can rotate with the hinge point to be parallel to the rocker arm, the extension rod is used to lengthen the rocker arm and make the extension rod extend out of the aircraft cabin for manual unlocking;

[0014] When unlocking: the left end of the extension rod is used to rotate counterclockwise to be parallel to the rocker arm after being pulled downward, and then forced to unlock by the right end of the connecting rod after being pushed upward,

[0015] When locking: the left end of the extension rod is used to fold upward to be parallel to the rocker arm after the hinge point moves upward.

[0016] Further, two connecting rods are arranged on the front side and the rear side of the pull rod respectively, the right end of each connecting rod is hinged to the right end of the pull rod, the left end of each connecting rod is hinged to the right end of the connecting plate, the right end of each connecting rod extends downward to form two ear plates, a stop rod along the front-rear direction is arranged between the two ear plates, and the stop rod is used to hang the lock hook.

[0017] Further, two connecting plates are arranged on the front side and the rear side of the pull rod respectively, the right end of each connecting plate is hinged to the left end of each connecting rod, the left end of each connecting plate is used to pass the hinge rod through the front connecting plate, the rocker arm and the rear connecting plate in sequence from front to back, and then hinge the two connecting plates to the left end of the rocker arm, a first elastic member is arranged between the hinge rod and the stop rod, the left end of the first elastic member is sleeved on the hinge rod, the right end of the first elastic member is sleeved on the stop rod, and the first elastic member is used to pull the connecting plate to move rightward during unlocking and provide power for the reset of the connecting plate.

[0018] Further, the rocker arm is composed of left-right running rear wall plates and front wall plates, and connecting plates between the rear wall plates and the front wall plates, the left end of each rear wall plate and front wall plate is hinged to the two connecting plates respectively, and the lock hook is located between the middle of the rear wall plates and the front wall plates and is fixedly connected with the rear wall plates and the front wall plates.

[0019] Further, the lock hook is composed of left-right running rear hook plates and front hook plates, and a connecting plate running in the front-rear direction, the rear end of the connecting plate is fixedly connected with the rear hook plate, the front end of the connecting plate is fixedly connected with the front hook plate, the rear hook plate is fixedly connected with the rear wall plate, the front hook plate is fixedly connected with the front wall plate, the upper end of the rear hook plate and the front hook plate extends upward to form a hook structure, and then hooks the stop rod during locking.

[0020] Further, a shearing hole is formed in the right end of the rear wall plate along the left-right direction, and a limiting hole is formed in the right end of the extension rod along the left-right direction,

[0021] It also comprises:

[0022] The left baffle is arranged in front of and behind and is located between the rear wall plate and the front wall plate, and the rear end is fixedly connected with the rear wall plate and the front end is fixedly connected with the front wall plate,

[0023] The right baffle is arranged in front of and behind and is located between the rear wall plate and the front wall plate and right side of the left baffle, and the rear end is fixedly connected with the rear wall plate and the front end is fixedly connected with the front wall plate, and the right baffle is provided with an extension hole,

[0024] The stop block is located between the left baffle and the right baffle,

[0025] The stop pin is arranged in front of and behind, the front end is fixedly connected with the front side of the stop block, and the rear end extends forward through the shearing hole of the rear wall plate,

[0026] The second elastic member is fixedly connected with the left end of the left baffle and the right end of the stop block,

[0027] The shearing pin is fixedly connected with the right side of the stop block and extends rightward through the extension hole, and the shearing pin is used for extending the extension rod and the rocker arm into the limiting hole of the extension rod to limit the extension rod when unlocking,

[0028] The stop pin is used for moving leftward along the shearing hole under force, driving the shearing pin to separate from the limiting hole of the extension rod through the stop block, and rotating the left end of the extension rod to be parallel to the rocker arm, and then extending into the limiting hole of the extension rod to limit it.

[0029] The beneficial effects of the present application are that the present application can realize the quick opening and closing of the left and right reverse thrust device fairings of the airplane due to the arrangement of the rocker arm and the extension rod, the stroke of the lock hook is greatly extended through the arrangement of the sliding hole, the length of the pull rod is long, the size of the present application is increased, the extension rod is located outside the cabin, the lock can be unlocked from outside the cabin through the extension rod, the space occupancy and the unlocking angle of the opening and closing lock action are greatly reduced, the present application is simple to operate and has good stability. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 It is an exploded view of the present application;

[0031] Fig. 2 It is a schematic view of the locking structure of the present application;

[0032] Fig. 3 It is a schematic view of the unlocking structure of the present application.

[0033] Wherein: 1, pull rod; 2, left end; 3, right end; 4, sliding hole; 5, connecting rod; 6, connecting plate; 7, lock hook; 8, extension rod; 9, rocker arm; 10, stop rod; 11, ear plate; 12, hinged rod; 13, front wall plate; 14, rear wall plate; 15, connecting plate; 16, front hook plate; 17, rear hook plate; 18, connecting plate; 19, left baffle; 20, limiting hole; 21, second elastic member; 22, first elastic member; 23, stop block; 24, stop pin; 25, shear pin. DETAILED DESCRIPTION

[0034] The application will be described in detail below in combination with the drawings and specific embodiments.

[0035] The application discloses a large hook lock for airplane engine cover, as shown in the figure, which comprises a pull rod 1, a connecting rod 5, a connecting plate 6, a rocker arm 9 and a lock hook 7. Figs. 1-3

[0036] The "trend" in the application is described according to the trend when the application is in the locked state. When the application is in the unlocked state, the trend of the extension rod 8 and the rocker arm 9 will change, that is, the trend of the extension rod 8 and the rocker arm 9 changes from left and right to up and down.

[0037] The left end 2 of the pull rod 1 is hook-shaped and is used for hooking on the locking bolt on the inner side of the left thrust reverser fairing of the airplane. A strip-shaped sliding hole 4 is formed on the right half of the pull rod 1 along the trend of the pull rod 1. The sliding hole 4 is used for the step pin of the right thrust reverser fairing to extend from front to back and fix the hook lock on the inner side of the right thrust reverser fairing, and make the pull rod 1 move left and right when unlocking and locking.

[0038] The right end of the connecting rod 5 is hinged with the right end 3 of the pull rod 1. The right end of the connecting plate 6 is hinged with the left end of the connecting rod 5. The rocker arm 9 is strip-shaped. The left end of the rocker arm 9 is hinged with the left end of the connecting plate 6. The lock hook 7 is fixed in the middle of the rocker arm 9. The lock hook 7 is used for hooking on the right end of the connecting rod 5 to keep the locked state when locking.

[0039] In the locked state, the right end of the rocker arm 9 is used for receiving upward thrust, so that the lock hook 7 releases the connecting rod 5. Then the right end of the rocker arm 9 receives downward thrust and moves downward. In turn, the connecting plate 6 pulls the connecting rod 5 to move right and downward, and forces the pull rod 1 to move left along the sliding hole 4, so that the left end 2 of the pull rod 1 releases the locking bolt of the airplane cabin door to complete the unlocking.

[0040] The locked state of the application refers to that the left thrust reverser fairing and the right thrust reverser fairing are close to each other. The unlocked state refers to that the left thrust reverser fairing and the right thrust reverser fairing do not interfere with each other and are in the open state.

[0041] ​The present application also comprises: an extension rod 8, the right end of the extension rod 8 is hinged with the right end of the rocker arm 9 and can rotate with the hinge point to be parallel with the rocker arm 9, the extension rod 8 is used to lengthen the rocker arm 9 and make the extension rod 8 extend out of the aircraft cabin to facilitate manual unlocking.

[0042] When unlocking: the left end of the extension rod 8 is used to rotate counterclockwise to be parallel with the rocker arm 9 after being pulled downward and rotate clockwise to be parallel with the rocker arm 9 after being pushed upward, and force the lock hook 7 to release the right end of the connecting rod 5 to complete the unlocking.

[0043] The connecting rod 5 is provided with two and is located at the front side and the rear side of the pull rod 1 respectively, the right end of the two connecting rods 5 is hinged with the right end 3 of the pull rod 1, the left end of the two connecting rods 5 is hinged with the right end of the connecting plate 6, the right end of the two connecting rods 5 extends downward to form two ear plates 11, a stop rod 10 along the front and rear direction is arranged between the two ear plates 11, and the stop rod 10 is used to hang the lock hook 7.

[0044] The connecting plate 6 is provided with two and is located at the front side and the rear side of the pull rod 1 respectively, the right end of the two connecting plates 6 is hinged with the left end of the two connecting rods 5 respectively, the left end of the two connecting plates 6 is used to hinge a hinge rod 12 to pass through the front connecting plate 6, the rocker arm 9 and the rear connecting plate 6 in turn from front to back, then hinge the left end of the two connecting plates 6 with the rocker arm 9, a first elastic element 22 is arranged between the hinge rod 12 and the stop rod 10, the left end of the first elastic element 22 is sleeved on the hinge rod 12, the right end of the first elastic element 22 is sleeved on the stop rod 10, and the first elastic element 22 is used to pull the connecting plate 6 to move rightward when unlocking and provide power for the reset of the connecting plate 6.

[0045] The rocker arm 9 is composed of a left and right running rear wall plate 13 and a front wall plate 14 and a connecting plate 15 between the rear wall plate 13 and the front wall plate 14, the left end of the rear wall plate 13 and the front wall plate 14 is hinged with the two connecting plates 6 respectively, the lock hook 7 is located between the middle part of the rear wall plate 13 and the front wall plate 14 and is fixedly connected with the rear wall plate 13 and the front wall plate 14.

[0046] The lock hook 7 is composed of a left and right running rear hook plate 16, a front hook plate 17 and a front and rear running connecting plate 18, the rear end of the connecting plate 18 is fixedly connected with the rear hook plate 16, the front end is fixedly connected with the front hook plate 17, the rear hook plate 16 is fixedly connected with the rear wall plate 13, the front hook plate 17 is fixedly connected with the front wall plate 14, the upper end of the rear hook plate 16 and the front hook plate 17 extends upward to form a hook structure, and then hooks the stop rod 10 when locking.

[0047] A shearing hole is opened in the right end of the rear wall plate 13 along the left and right direction, the right end of the extension rod 8 penetrates a limiting hole 20 along the left and right direction, and the present application also comprises: a left baffle 19, a right baffle, a stop block 23, a stop pin 24, a second elastic element 21 and a shearing pin 25.

[0048] The left baffle 19 is arranged in a front-to-back direction, is located between the rear wall plate 13 and the front wall plate 14, and is fixedly connected at a rear end to the rear wall plate 13 and at a front end to the front wall plate 14.

[0049] The right baffle is arranged in a front-to-back direction, is located between the rear wall plate 13 and the front wall plate 14 and to the right of the left baffle 19, is fixedly connected at a rear end to the rear wall plate 13 and at a front end to the front wall plate 14, and is provided with an extension hole.

[0050] The stop block 23 is located between the left baffle 19 and the right baffle, and the stop pin 24 is arranged in a front-to-back direction, is fixedly connected at a front end to a front side of the stop block 23, and is fixedly connected at a rear end to a rear wall plate 13 extension hole and extends forward.

[0051] The left end of the second elastic member 21 is fixed to the left baffle 19, the right end is fixed to the stop block 23, the left end of the shearing pin 25 is fixed to the right side of the stop block 23, and the right end extends to the right through the extension hole. The shearing pin 25 is used to extend the locking rod 8 and the rocker arm 9 in parallel, and then extend into the limiting hole 20 of the locking rod 8 to limit the locking rod 8. The stop pin 24 is used to move to the left along the shearing hole under stress, and drive the shearing pin 25 to disengage from the limiting hole 20 of the locking rod 8 through the stop block 23, so that the left end of the locking rod 8 rotates to be parallel to the rocker arm 9, and then extends into the limiting hole 20 of the locking rod 8 to limit it.

[0052] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large hook lock for an aircraft engine cowling, characterized in that, include: The pull rod (1) has a hook-shaped left end (2) for hooking onto the locking bolt inside the left thrust reverser fairing of the aircraft. The right half of the pull rod (1) has a strip-shaped sliding hole (4) along its direction. The sliding hole (4) is used for the stepped pin of the right thrust reverser fairing of the aircraft to extend from front to back and lock the hook to the inside of the right thrust reverser fairing. It also allows the pull rod (1) to move left and right when locking and unlocking. The connecting rod (5) has its right end hinged to the right end (3) of the pull rod (1). The connecting plate (6) has its right end hinged to the left end of the connecting rod (5). The rocker arm (9) is strip-shaped, and its left end is hinged to the left end of the connecting plate (6). A locking hook (7) is fixed to the middle of the rocker arm (9) and is used to hook onto the right end of the connecting rod (5) when locked. In the locked state, the right end of the rocker arm (9) is subjected to an upward thrust, causing the lock hook (7) to release the connecting rod (5). The right end of the rocker arm (9) is also subjected to a downward thrust and moves downward, thereby pulling the connecting rod (5) to the right and downward through the connecting plate (6). The pull rod (1) is used to move to the left along the sliding hole (4) so ​​that the left end (2) of the pull rod (1) loosens the locking bolt to complete the unlocking.

2. A large hook lock for an aircraft engine cowling according to claim 1, characterized in that, Also includes: The extension rod (8) is hinged at its right end to the right end of the rocker arm (9) and can be rotated at the hinge point to be parallel to the rocker arm (9). The extension rod (8) is used to lengthen the rocker arm (9) and extend the extension rod (8) outside the aircraft cabin for easy manual unlocking. During unlocking: the left end of the extension rod (8) is subjected to a downward pulling force and then rotates counterclockwise until it is parallel to the rocker arm (9). When it is then subjected to an upward pushing force, it forces the lock hook (7) to release the right end of the connecting rod (5) to complete the unlocking. When locked: the left end of the extension rod (8) is used to fold up to be parallel to the rocker arm (9) after moving clockwise at its hinge point.

3. A large hook lock for an aircraft engine cowling according to claim 1 or 2, characterized in that, There are two connecting rods (5), which are located on the front and rear sides of the pull rod (1) respectively. The right ends of the two connecting rods (5) are hinged to the right end (3) of the pull rod (1), and the left ends of the two connecting rods (5) are hinged to the right end of the connecting plate (6). The right ends of the two connecting rods (5) extend downward to form two ear plates (11). A stop bar (10) is provided between the two ear plates (11) in the front-rear direction. The stop bar (10) is used to hook the lock hook (7).

4. A large hook lock for an aircraft engine cowling according to claim 1 or 2, characterized in that, Two connecting plates (6) are provided, located on the front and rear sides of the pull rod (1) respectively. The right ends of the two connecting plates (6) are respectively hinged to the left ends of the two connecting rods (5). The left ends of the two connecting plates (6) are used to hinge the rod (12) from front to back through the front connecting plate (6), rocker arm (9), and rear connecting plate (6) in sequence, and then hinge the two connecting plates (6) to the left ends of the rocker arm (9). A first elastic element (22) is provided between the hinge rod (12) and the stop rod (10). The left end of the first elastic element (22) is sleeved on the hinge rod (12), and its right end is sleeved on the stop rod (10). The first elastic element (22) is used to pull the connecting plate (6) to the right when unlocking and to provide the power for the connecting plate (6) to reset.

5. A large hook lock for an aircraft engine cowling according to claim 2, characterized in that, The rocker arm (9) consists of a rear wall plate (13) and a front wall plate (14) running left and right, and a connecting plate (15) located between the rear wall plate (13) and the front wall plate (14). The left ends of the rear wall plate (13) and the front wall plate (14) are respectively hinged to two connecting plates (6). The locking hook (7) is located between the middle of the rear wall plate (13) and the front wall plate (14) and is fixedly connected to the rear wall plate (13) and the front wall plate (14).

6. A large hook lock for an aircraft engine cowling according to claim 5, characterized in that, The locking hook (7) is composed of a rear hook plate (16) running left and right, a front hook plate (17) and a connecting plate (18) running front and back. The rear end of the connecting plate (18) is fixedly connected to the rear hook plate (16) and the front end is fixedly connected to the front hook plate (17). The rear hook plate (16) is fixedly connected to the rear wall plate (13) and the front hook plate (17) is fixedly connected to the front wall plate (14). The upper ends of the rear hook plate (16) and the front hook plate (17) extend upward to form a hook-shaped structure, which hooks the stop bar (10) when locked.

7. A large hook lock for an aircraft engine cowling according to claim 5, characterized in that, A shearing hole is provided at the right end of the rear wall panel (13) in the left-right direction, and a limit hole (20) is provided at the right end of the extension rod (8) in the left-right direction. Also includes: The left baffle (19) is arranged in a front-to-back direction and is located between the rear wall panel (13) and the front wall panel (14). Its rear end is fixedly connected to the rear wall panel (13), and its front end is fixedly connected to the front wall panel (14). The right baffle, arranged in a front-to-back direction, is located between the rear wall panel (13) and the front wall panel (14), and to the right of the left baffle (19). Its rear end is fixedly connected to the rear wall panel (13), and its front end is fixedly connected to the front wall panel (14). An insertion hole is provided on the right baffle. The stop block (23) is located between the left baffle (19) and the right baffle. The stop pin (24) is arranged in a front-rear direction, with its front end fixedly connected to the front side of the stop block (23), and its rear end passing through the shear hole of the rear wall plate (13) and extending forward. The second elastic element (21) has its left end fixed to the left baffle (19) and its right end fixedly connected to the stop block (23). The shear pin (25) has its left end fixedly connected to the right side of the stop block (23), and its right end extends to the right through the insertion hole. The shear pin (25) is used to limit the extension rod (8) by extending into the limiting hole (20) of the extension rod (8) after the extension rod (8) and the rocker arm (9) are parallel when unlocking. The stop pin (24) is used to move to the left along the shear hole after being subjected to force, and after the stop block (23) drives the shear pin (25) to disengage from the limiting hole (20) of the extension rod (8), so that when the left end of the extension rod (8) rotates to be parallel with the rocker arm (9), it extends into the limiting hole (20) of the extension rod (8) again to limit it.

Images