An electro-hydraulic lock structure

Abstract

The application belongs to the field of aircraft structure design, and particularly relates to an electro-hydraulic lock structure, which comprises a shell, a hydraulic actuating cylinder installed in the shell, a lock hook hinged to the shell and having a first recess at a first end and a lock slot connected with the first recess and a second end, a lock key hinged to the shell at the second end position, the lock key comprising a first branch arm and a second branch arm, in a locked state, the first branch arm end is arranged in the first recess to limit the rotation of the lock hook in an unlocking direction, in an unlocked state, the first branch arm end is arranged in a second recess, in unlocking, the hydraulic actuating cylinder acts on the second branch arm, and the first branch arm end slides from the first recess into the second recess, in locking, the lock ring is moved in a direction forming an included angle with the lock slot wall surface to rotate the lock hook in a locking direction, and the first branch arm end is passively slid along the second recess into the first recess, a first spring provides a pre-tightening force for the rotation of the lock hook in the unlocking direction, and a second spring provides a pre-tightening force for the rotation of the lock key in an upward locking direction.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aircraft structure design, and particularly relates to an electric hydraulic lock structure. BACKGROUND

[0002] The lock mechanism on an aircraft generally adopts hydraulic unlocking under normal circumstances, and is unlocked by manual mechanical transmission or emergency energy under emergency conditions. The mechanical emergency unlocking is manually operated by a handle, and then transmitted by a cable or a connecting rod mechanism to finally open the lock mechanism. This has the problems of great space layout difficulty, many components, and complex inspection and seasonal adjustment. The emergency energy unlocking is to use an emergency energy other than the normal energy to drive an emergency unlocking cylinder to open the lock mechanism. This type of upper lock needs to integrate an independent emergency unlocking cylinder on the lock structure, and also needs to be provided with an independent emergency energy on the aircraft, which has the problems of great weight and space waste caused by low integration. SUMMARY

[0003] In order to solve the above problems, the present application provides an electric hydraulic lock structure, comprising: a shell; a hydraulic actuating cylinder installed in the shell;

[0004] a lock hook hinged on the shell, the first end of the lock hook having a first recess and a second recess connected with the first recess, and the second end of the lock hook having a lock slot;

[0005] a lock key hinged on the shell at the second end position, the lock key comprising a first branch arm and a second branch arm;

[0006] In the locked state, the end of the first branch arm is located in the first recess to limit the rotation of the lock hook in the unlocking direction; and in the unlocked state, the end of the first branch arm is located in the second recess;

[0007] In the unlocking state, the hydraulic actuating cylinder acts on the second branch arm, and the end of the first branch arm slides from the first recess to the second recess;

[0008] In the locking state, the lock ring is moved in a direction forming an angle with the wall surface of the lock slot to rotate the lock hook in the locking direction, and the end of the first branch arm is passively slid along the second recess to the first recess;

[0009] a first spring hinged at one end on the lock hook and at the other end on the shell to provide a pre-tightening force for the rotation of the lock hook in the unlocking direction;

[0010] a second spring hinged at one end on the lock key and at the other end on the shell to provide a pre-tightening force for the rotation of the lock key in the locking direction.

[0011] Preferably, the lock hook further comprises a third end having a first stop surface and a second stop surface, and the shell has a fixed shaft pin located between the first stop surface and the second stop surface; in the locked state, the first stop surface is in contact with the fixed shaft pin for limiting, and in the unlocked state, the second stop surface is in contact with the fixed shaft pin for limiting.

[0012] Preferably, the lock key has a pivot hole hinged to the shell through a lock key pivot, a keyway is arranged on the pivot hole, a spline is arranged on the lock key pivot, the width of the keyway is greater than the width of the spline to form an idle stroke angle, and the lock key pivot is connected with the motor.

[0013] Preferably, the hydraulic actuator is overlapped with the second supporting arm, and a return compression spring is arranged inside the hydraulic actuator to reset the actuating shaft of the hydraulic actuator after unlocking.

[0014] Preferably, the shell comprises a rear wall plate, a front wall plate and a split side closure plate, and the rear wall plate, the front wall plate and the split side closure plate are fixed through screws.

[0015] Preferably, the idle stroke angle is greater than or equal to the stroke angle of the lock key.

[0016] Preferably, the end of the first supporting arm has a roller.

[0017] The advantages of the present application include: compared with the prior art, the electric hydraulic lock structure has the advantages of compact structure, high integration and lightweight arrangement, and can greatly reduce the arrangement space and weight of the external unlocking unit, and can realize hydraulic unlocking and electric unlocking, and the same set of force transmission structure components are driven when the two unlocking modes are operated respectively, and the driving units are independent and do not affect each other. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic diagram of an electric hydraulic lock structure of a preferred embodiment of the present application;

[0019] Fig. 2 is a side view of an electric hydraulic lock structure of a preferred embodiment of the present application.

[0020] 1- lock hook, 2- lock key, 3- fixed shaft pin, 4- hydraulic actuator, 5- first spring, 6- second spring, 7- unlocking motor, 8- rear wall plate, 9- front wall plate, 10- split side closure plate, 11- lock key pivot, 12- first stop surface, 13- second stop surface, 14- first recess surface, 15- second recess surface, 16- roller, 17- return compression spring, 19- lock slot, 21- first supporting arm, 22- second supporting arm. DETAILED DESCRIPTION

[0021] In order to make the technical solutions of the present application and the advantages thereof clearer, the technical solutions of the present application will be further clearly and completely described below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only some of the embodiments of the present application, which are used to explain the present application, but not to limit the present application. It should be noted that, for the purpose of description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the general design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0022] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present application should be the general meanings understood by the general skilled in the art to which the present application belongs. The words indicating the direction or position, such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, are only used to indicate the relative direction or position relationship, and not to imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and the relative position relationship may also change accordingly when the absolute position of the described object changes, therefore it cannot be understood as a limitation on the present application. The "first", "second", "third" and the like used in the description of the present application are only for the purpose of description, to distinguish different components, and cannot be understood as indicating or implying relative importance. The "one", "an" or "the" and the like used in the description of the present application should not be understood as an absolute limitation on the quantity, but should be understood as the presence of at least one. The "including" or "containing" and the like used in the description of the present application means that the elements or objects appearing before the word are covered by the elements or objects listed after the word and their equivalents, and other elements or objects are not excluded.

[0023] In addition, it should be further noted that, unless otherwise specified and limited, the "mounting", "connection", "connection" and the like used in the description of the present application should be understood in a broad sense, for example, the connection can be a fixed connection, or a detachable connection, or an integral connection; can be a mechanical connection, or an electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, and those skilled in the art can understand the specific meaning of the present application according to the specific circumstances.

[0024] As shown in Figs. 1-2 In order to solve the above problems, the present application provides an electric hydraulic lock structure, comprising: a shell; a hydraulic actuator 4 mounted in the shell;

[0025] A lock hook 1 is hinged on the shell, and the first end has a first groove 14 and a second end has a lock groove 19 connected with the first groove 14;

[0026] A lock key 2 is hinged to the housing at the second end position, and comprises a first arm 21 and a second arm 22;

[0027] In the locked state, the end of the first arm 21 is located in the first groove 14 to limit the rotation of the lock hook 1 in the unlocking direction; in the unlocked state, the end of the first arm 21 is located in the second groove 15.

[0028] In the unlocked state, the hydraulic cylinder 4 acts on the second arm 22, and the end of the first arm 21 slides from the first groove 14 to the second groove 15; the first arm 21 is the driving device, and the lock hook 1 is the driven device.

[0029] In the locked state, the lock ring moves at an angle with the wall of the lock slot 19 to rotate the lock hook 1 in the locking direction; the lock ring cooperates with the lock hook to lock, which is not shown in the figure, that is, the lock ring contacts the upper surface of the lock hook slot and pushes the lock hook to rotate, and the end of the first arm 21 is passively slid along the second groove 15 into the first groove 14; the first arm 21 is the driven device, and the lock hook 1 is the driving device. The upper technical feature is that when the end of the first arm 21 slides from the first groove 14 to the second groove 15, the lock key 2 must move, so the first groove 14 forms a dead corner slope, and when the lock hook 1 is the driving device, the first groove 14 and the first arm 21 form a dead point card position. When the lock is locked, the end of the first arm 21 slides from the second groove 15 into the first groove 14, and there is no dead point position in the process, thereby forming the technical features of unlocking and locking of the present application.

[0030] The first spring 5 is hinged at one end to the lock hook 1 and at the other end to the housing, and provides a pre-tightening force for the rotation of the lock hook 1 in the unlocking direction.

[0031] The second spring 6 is hinged at one end to the lock key 2 and at the other end to the housing, and provides a pre-tightening force for the rotation of the lock key 2 in the locking direction. The second spring 6 always generates a restoring force to restore the lock key 2 to the initial state of locking.

[0032] The lock key 2 has a rotating shaft hole, which is hinged to the housing through a lock key rotating shaft 11. A key groove is provided on the rotating shaft hole, and a spline is provided on the lock key rotating shaft 11. The width of the key groove is greater than the width of the spline to form an idle angle. The lock key rotating shaft 11 is connected to the motor 7. The housing comprises a rear wall plate 8, a front wall plate 9, and a split side closure plate 10. The rear wall plate 8, the front wall plate 9, and the split side closure plate 10 are fixed by screws. The lock key rotating shaft 11 is connected to the shaft holes of the rear wall plate 8 and the front wall plate 9. The idle angle is greater than or equal to the stroke angle of the lock key 2. The end of the first arm 21 has a roller.

[0033] The lock hook 1 further comprises a third end having a first stop surface 12 and a second stop surface 13, and the housing is provided with a fixed shaft pin 3 located between the first stop surface 12 and the second stop surface 13; in the locked state, the first stop surface 12 is in contact with the fixed shaft pin 3 for limiting, and in the unlocked state, the second stop surface 13 is in contact with the fixed shaft pin 3 for limiting; when the first stop surface 12 on the lock hook 1 is in contact with the fixed shaft pin 3, the maximum position of the unlocking rotation is limited; and when the second stop surface 13 on the lock hook 1 is in contact with the fixed shaft pin 3, the maximum position of the locking rotation is limited.

[0034] Preferably, the hydraulic actuator 4 is overlapped with the second branch 22, and a return compression spring 17 is arranged inside the hydraulic actuator 4 to reset the actuating shaft of the hydraulic actuator 4 after unlocking.

[0035] When the hydraulic actuator 4 is normally unlocked, the piston rod of the hydraulic actuator 4 pushes the lock key 2 to rotate, the roller 16 on the lock key 2 presses the first groove 14 on the lock hook 1 to rotate the lock hook 1, until the roller 16 is in contact with the second groove 15 on the lock hook 1, and the lock hook 1 is rotated to the limit position, and the unlocking is completed.

[0036] When the emergency electric unlocking is performed, the motor 7 drives the lock key rotating shaft 11 to rotate, and in the process of the idle stroke, the lock key 2 does not rotate until the idle stroke is completed, the spline of the lock key rotating shaft 11 drives the internal spline of the lock key 2 to rotate together, the roller 16 on the lock key 2 presses the first groove 14 on the lock hook 1 to rotate the lock hook 1, until the roller 16 is in contact with the second groove 15 on the lock hook 1, and the lock hook 1 is rotated to the limit position, and the unlocking is completed, and then the rotating shaft of the motor 7 is reset.

[0037] When the lock is locked, an external force pushes the lock hook 1 to rotate, at this time, the roller 16 on the lock key 2 moves on the second groove 15 and enters the first groove 14, until the second stop surface 13 on the lock hook 1 is in contact with the fixed shaft pin 3 to limit the maximum position of the locking rotation, and after the external force is removed, the load on the lock hook 1 makes the roller 16 return to the second stop surface 13 of the lock hook, and the locking is completed.

[0038] The emergency unlocking motor 7 is reset after completing the emergency unlocking task once, to ensure the normal operation of the hydraulic unlocking or the electric unlocking next time.

[0039] The advantages of the present application include: compared with the prior art, the electric hydraulic lock structure has the advantages of compact structure, high integration, lightweight arrangement characteristics, and can greatly reduce the arrangement space and weight of the external unlocking unit, and can realize two unlocking forms of hydraulic unlocking and electric unlocking, and the same set of force transmission structure components are driven when the two unlocking forms are respectively operated, and the driving units are independent and do not affect each other.

[0040] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An electro-hydraulic lock structure, characterized by, It comprises: a casing; a hydraulic actuator (4) installed in the casing; a lock hook (1) hinged on the casing, the first end of the lock hook (1) having a first recess (14) and a second end having a lock slot (19); a lock key (2) hinged on the casing at the second end position, the lock key (2) comprising a first branch (21) and a second branch (22); in the locked state, the end of the first branch (21) is located in the first recess (14) to limit the rotation of the lock hook (1) in the unlocking direction; in the unlocked state, the end of the first branch (21) is located in the second recess (15); in the unlocking, the hydraulic actuator (4) acts on the second branch (22), and the end of the first branch (21) slides from the first recess (14) to the second recess (15); in the locking, the lock ring moves at an angle with the wall of the lock slot (19) to rotate the lock hook (1) in the locking direction, and the end of the first branch (21) is passively slid along the second recess (15) to the first recess (14); a first spring (5) hinged on one end of the lock hook (1) and on the other end of the casing to provide a pre-tightening force for the rotation of the lock hook (1) in the unlocking direction; a second spring (6) hinged on one end of the lock key (2) and on the other end of the casing to provide a pre-tightening force for the rotation of the lock key (2) in the locking direction.

2. The electric hydraulic lock structure according to claim 1, wherein the lock hook (1) further comprises a third end having a first stop surface (12) and a second stop surface (13), and the casing has a fixed shaft pin (3) located between the first stop surface (12) and the second stop surface (13); in the locked state, the first stop surface (12) is in contact with the fixed shaft pin (3) for limiting, and in the unlocked state, the second stop surface (13) is in contact with the fixed shaft pin (3) for limiting.

3. The electro-hydraulic lock structure according to claim 1, wherein the lock key (2) has a rotating shaft hole hinged on the casing through a lock key rotating shaft (11), the rotating shaft hole is provided with a key groove, the lock key rotating shaft (11) is provided with a spline, the width of the key groove is greater than the width of the spline to form an idle stroke angle, and the lock key rotating shaft (11) is connected with a motor (7).

4. The electro-hydraulic lock structure according to claim 1, wherein the hydraulic actuator (4) is overlapped with the second branch (22), and a reset compression spring (17) is arranged in the hydraulic actuator (4) to reset the actuating shaft of the hydraulic actuator (4) after unlocking.

5. The electro-hydraulic lock structure according to claim 1, wherein the casing comprises a rear wall plate (8), a front wall plate (9) and a split type side closing plate (10), and the rear wall plate (8), the front wall plate (9) and the split type side closing plate (10) are fixed through screws.

6. The electro-hydraulic lock structure according to claim 3, wherein the idle stroke angle is greater than or equal to the stroke angle of the lock key (2).

7. The electro-hydraulic lock structure according to claim 3, wherein the end of the first branch (21) has a roller.

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