Uplock mechanism of undercarriage

Abstract

The utility model discloses an uplock mechanism of an undercarriage, which comprises a pull ring, a lock shell, an unlocking actuating cylinder and a proximity annunciator, the unlocking actuating cylinder and the proximity annunciator are connected with the lock shell, a lock hook, an unlocking extension spring connected with the lock hook, a stop shifting block capable of pushing the lock hook and a pressure spring connected with the stop shifting block are arranged in the lock shell, and the pressure spring is connected with the lock hook. The locking shifting block comprises a signal contact shifting block, a limiting protruding block and a manual unlocking pull rod which integrally and coaxially rotate, a lock hook groove capable of locking the pull ring is further formed in the lock hook, the lock hook drives the locking shifting block to rotate under the action of the pull ring, and locking or unlocking of the uplock mechanism is achieved through contact or separation of the manual unlocking pull rod and the unlocking actuator cylinder. And an in-place signal is fed back through the contact between the signal contact shifting block and the proximity annunciator. By the adoption of the uplock mechanism, unlocking reliability is improved, repair and maintenance are facilitated, and the uplock mechanism is simple in overall structure, convenient to assemble, high in space utilization rate and suitable for application and popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft design in aviation engineering, in particular to an upper locking mechanism for a landing gear. Background Art

[0002] The function of the landing gear upper lock is to fix the landing gear in the retracted position and bear the mass load of the landing gear under various flight conditions of the aircraft. It has the dual role of load-bearing structure and moving mechanism, so its design requirements are very important. Since the reliability of the locking mechanism has a very important impact on the functional reliability of the landing gear system, it is necessary to ensure normal movement during the opening and closing process of the locking mechanism. Common upper locks are hook and ring type, strut type and actuator internal lock type. Among them, the hook and ring type is a relatively common one. The hook and ring type refers to the lock hook installed on the upper lock mechanism to hook the lock ring on the moving component of the landing gear, thereby fixing the moving component in the desired position. This is a common form of aircraft upper locks. The upper lock must be opened in advance when lowering the landing gear. Therefore, the unlocking function of the upper lock is the first thing to be guaranteed.

[0003] After searching, the patent document with the authorization announcement number CN204210730U discloses a landing gear upper lock mechanism, the patent document with the authorization announcement number CN204210730U also discloses a landing gear upper lock mechanism, and the patent document with the authorization announcement number CN214397209U discloses a high-reliability landing gear upper lock. From the contents disclosed in the three retrieved patent documents, an upper lock mechanism that meets the use requirements is provided from different angles. In order to improve the reliability of unlocking and locking, prevent the shell from deformation and damage, and also to facilitate repair and maintenance on the ground, an upper lock mechanism different from that disclosed in the prior art is provided to meet the use requirements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to solve the problems existing in the background technology, so as to provide an upper locking mechanism with simple structure and convenient operation. The upper locking mechanism can not only increase the reliability of unlocking, but also facilitate repair and maintenance on the ground. Specifically, it is a landing gear upper locking mechanism.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a landing gear upper lock mechanism comprises a pull ring connected to the landing gear, a lock shell, an unlocking actuator cylinder and a proximity signal device connected to the lock shell, a lock hook and an unlocking tension spring connected to the lock hook are arranged in the lock shell, a stop block capable of pushing the lock hook and a compression spring connected to the stop block are also arranged in the lock shell, the stop block comprises a signal contact block, a limiting protrusion and a manual unlocking pull rod that rotate coaxially as a whole, one end of the compression spring is connected to the lock shell, and the other end is connected to the stop block through the limiting protrusion, a lock hook groove capable of locking the pull ring is also arranged on the lock hook, and the lock hook drives the stop block to rotate under the action of the pull ring, and the manual unlocking pull rod contacts or separates with the unlocking actuator cylinder to realize locking or unlocking of the upper lock mechanism, and a position signal is fed back through the signal contact block and the proximity signal device.

[0006] Furthermore, a landing gear upper lock mechanism described in the utility model is adopted, and a first connecting shaft and a second connecting shaft are provided in the lock housing, the lock hook is rotatably connected to the lock housing via the first connecting shaft, and the stop block is rotatably connected to the lock housing via the second connecting shaft, and a stop limit block which rotates coaxially as a whole is also provided in the stop block, and the stop block and the lock hook are in contact and connected via the stop limit block.

[0007] Furthermore, a landing gear upper lock mechanism described in the utility model is adopted, the lock hook groove is located on the lock hook on the lower side of the first connecting shaft, and the lock hook groove is arranged in a U-shaped groove structure for guiding and limiting the pull ring.

[0008] Furthermore, a landing gear upper locking mechanism described in the utility model is adopted, the unlocking actuator cylinder includes a normal unlocking actuator cylinder and an emergency unlocking actuator cylinder, the normal unlocking actuator cylinder and the emergency unlocking actuator cylinder both include an actuator cylinder body and a push rod connected to the actuator cylinder body, the normal unlocking actuator cylinder and the emergency unlocking actuator cylinder are respectively connected to the lock housing through corresponding push rods, wherein the emergency unlocking actuator cylinder is located above the normal unlocking actuator cylinder, the push rod and the manual unlocking pull rod in the stop shift block are spaced a predetermined distance apart, the lock hook drives the stop shift block to rotate under the action of the pull ring, and the upper locking mechanism is locked or unlocked by the manual unlocking pull rod contacting or separating with the push rod, and the signal contact block contacts the proximity signal device to feedback the arrival signal.

[0009] Furthermore, a landing gear upper locking mechanism described in the utility model is adopted, the proximity signaler includes a signaler body and a signal connecting rod connected to the signaler body, the proximity signaler is connected to the lock housing through the signal connecting rod, wherein the proximity signaler is located above the emergency unlocking actuator cylinder, the signal connecting rod and the signal contact block in the stop block are spaced a predetermined distance, the stop block contacts or separates from the signal connecting rod in the proximity signaler through the signal contact block, and when the signal contact block contacts the signal connecting rod, the upper locking mechanism is locked into position signal feedback is realized.

[0010] Furthermore, with the landing gear upper lock mechanism described in the utility model, one end of the unlocking tension spring is in contact with and connected to the lock hook, and the other end is fixed to the lock housing.

[0011] Furthermore, a landing gear upper lock mechanism described in the utility model is adopted, the manual unlocking rod in the stop block extends to the outside of the lock housing, and an opening and closing opening corresponding to the manual unlocking rod is provided in the lock housing.

[0012] By adopting the landing gear upper lock mechanism described in the utility model, the common shell force mode is changed to the connecting shaft force mode, which can prevent the shell from being deformed and damaged, and the stop block is provided with an integrally coaxially rotating signal contact block, a limit protrusion and a manual unlocking rod, and a double redundant unlocking method is adopted, so that the normal unlocking actuator cylinder and the emergency unlocking actuator cylinder are in contact and separated with the integrally coaxially rotating manual unlocking rod, which is not only convenient for contact or separation with the unlocking actuator cylinder and the proximity signal device, but also can make full use of the effective space; and through the manual unlocking rod extending to the outside of the lock shell, the stop block can be rotated counterclockwise through the manual unlocking rod to unlock the upper lock mechanism, which is convenient for repair and maintenance on the ground. It can be seen that the upper lock mechanism described in the utility model adopts a double redundant unlocking method, which increases the reliability of unlocking, and through the manual unlocking rod extending to the outside of the lock shell, it is convenient to carry out repairs and maintenance on the ground. The overall structure is simple, easy to assemble, high in space utilization, and the maintainability and economy are significantly improved, which is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a structural schematic diagram of the upper locking mechanism of the utility model when it is in a locked state;

[0015] Figure 2 It is a structural schematic diagram of the upper locking mechanism of the utility model when it is in an unlocked state.

[0016] As shown in the figure: 1-pull ring, 2-lock housing, 21-first connecting shaft, 22-second connecting shaft, 3-unlocking actuator, 31-normal unlocking actuator, 32-emergency unlocking actuator, 33-top rod, 4-proximity signaler, 41-signal connecting rod, 5-lock hook, 51-lock hook groove, 6-unlocking tension spring, 7-stop block, 71-signal contact block, 72-limiting protrusion, 73-manual unlocking pull rod, 74-stop limit block, 8-compression spring. DETAILED DESCRIPTION

[0017] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0018] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0021] like Figure 1 and Figure 2As shown, a landing gear upper lock mechanism described in the utility model includes a pull ring 1 connected to the landing gear, a lock shell 2, and an unlocking actuator 3 and a proximity signaler 4 connected to the lock shell 2. A lock hook 5 and an unlocking tension spring 6 connected to the lock hook 5 are arranged in the lock shell 2. One end of the unlocking tension spring 6 is in contact with the lock hook 5, and the other end is fixed to the lock shell 2. A stop block 7 capable of pushing the lock hook 5 and a compression spring 8 connected to the stop block 7 are also arranged in the lock shell 2. The stop block 7 includes a signal contact block 71, a limit convex block 72 and a manual unlocking pull rod 73 that rotates coaxially as a whole. One end of the compression spring 8 is connected to the lock housing 2, and the other end is connected to the stop block 7 through a limiting protrusion 72. A lock hook groove 51 capable of locking the pull ring 1 is also provided on the lock hook 5. Under the action of the pull ring 1, the lock hook 5 drives the stop block 7 to rotate, and contacts or separates with the unlocking actuator 3 through the manual unlocking rod 73, so as to realize the locking or unlocking of the upper lock mechanism, and contacts with the proximity signal device 4 through the signal contact block 71 to feedback the position signal.

[0022] Among them, the unlocking actuator 3 includes a normal unlocking actuator 31 and an emergency unlocking actuator 32, and the normal unlocking actuator 31 and the emergency unlocking actuator 32 both include an actuator body and a push rod 33 connected to the actuator body, and the normal unlocking actuator 31 and the emergency unlocking actuator 32 are respectively connected to the lock housing 2 through corresponding push rods 33, wherein the emergency unlocking actuator 32 is located above the normal unlocking actuator 31, and the push rod 33 is spaced a predetermined distance from the manual unlocking pull rod 73 in the stop block 7. Under the action of the pull ring 1, the lock hook 5 drives the stop block 7 to rotate, and the manual unlocking pull rod 73 contacts or separates from the push rod 33 to realize the locking or unlocking of the upper locking mechanism, and the signal contact block 71 contacts the proximity signal device 4 to feedback the arrival signal.

[0023] The proximity signaler 4 includes a signaler body and a signal connecting rod 41 connected to the signaler body, and the proximity signaler 4 is connected to the lock housing 2 through the signal connecting rod 41, wherein the proximity signaler 4 is located above the emergency unlocking actuator 32, and the signal connecting rod 41 is spaced a predetermined distance from the signal contact block 71 in the stop block 7, and the stop block 7 contacts or separates from the signal connecting rod 41 in the proximity signaler 4 through the signal contact block 71, and when the signal contact block 71 contacts the signal connecting rod 41, the upper lock mechanism is locked in place signal feedback is realized.

[0024] Furthermore, a landing gear upper lock mechanism described in the utility model is adopted, and a first connecting shaft 21 and a second connecting shaft 22 are provided in the lock housing 2, the lock hook 5 is rotatably connected to the lock housing 2 through the first connecting shaft 21, and the stop shift block 7 is rotatably connected to the lock housing 2 through the second connecting shaft 22, and a stop limit block 74 that rotates coaxially as a whole is also provided in the stop shift block 7, and the stop shift block 7 and the lock hook 5 are in contact and connected through the stop limit block 74; the lock hook groove 51 is located on the lock hook 5 on the lower side of the first connecting shaft 21, and the lock hook groove 51 is arranged in a U-shaped groove structure for guiding and limiting the pull ring 1; the manual unlocking rod 73 in the stop shift block 7 extends to the outside of the lock housing 2, and an opening and closing opening corresponding to the manual unlocking rod 73 is provided in the lock housing 2.

[0025] The upper locking mechanism of the landing gear of the utility model is adopted. Since the lock hook 5 is provided with a lock hook groove 51 corresponding to the pull ring 1, the lock hook groove 51 can be used to lock the pull ring 1 and keep the landing gear retracted in place and release the landing gear pull ring 1; the unlocking cylinder 3 is equipped with a normal unlocking cylinder 31 and an emergency unlocking cylinder 32, which can play the role of hydraulic unlocking and emergency unlocking; and the approaching signal 4 is to feedback the locking and unlocking signal. In the specific application process, its working principle is as follows: when the lock hook 5 and the stop block 7 are automatically locked when the landing gear is retracted, they bear the upward and downward loads after automatic locking, meeting the rigidity requirements under various working conditions; when the landing gear is retracted, the pull ring 1 triggers the lock hook 5 and embeds into the lock hook groove 51, and the upper locking mechanism is locked by the stop block 7; and when the landing gear needs to be lowered, the normal unlocking cylinder 31 triggers the stop block 7 to disengage from the lock hook 5, so that the upper locking mechanism is unlocked. During the locking and unlocking process of the upper locking mechanism, the signal contact block 71 in the stop block 7 contacts the signal connecting rod 41 in the proximity signal device 4 in the locked position state, so that the position signal can be fed back through the proximity signal device 4.

[0026] It can be seen that by adopting the upper lock mechanism described in the utility model, the common shell force mode is changed to the connecting shaft force mode, which can prevent the shell from being deformed and damaged, and the stop block 7 is provided with an integrally coaxially rotating signal contact block 71, a limit protrusion 72 and a manual unlocking pull rod 73, and a double redundant unlocking method is adopted, so that the normal unlocking actuator 31 and the emergency unlocking actuator 32 are in contact and separated with the integrally coaxially rotating manual unlocking pull rod 73, which is not only convenient for contact or separation with the unlocking actuator 3 and the proximity signal device 4, but also can make full use of the effective space; and by extending to the manual unlocking pull rod 73 outside the lock shell 2, the stop block 7 can be rotated counterclockwise through the manual unlocking pull rod 73 to unlock the upper lock mechanism, which is convenient for repair and maintenance on the ground.

[0027] To sum up, the upper lock mechanism described in the utility model adopts a double redundant unlocking method, which increases the reliability of unlocking, and through the manual unlocking rod 73 extending to the outside of the lock shell 2, it is convenient to carry out repairs and maintenance on the ground. The overall structure is simple, easy to assemble, high in space utilization, and the maintainability and economy are significantly improved, which is suitable for promotion and application.

[0028] Other details of the present invention are all conventional techniques known to those skilled in the art.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various changes and variations are possible. Any modifications, equivalent substitutions, improvements, etc. made using the present invention should be included in the protection scope of the present invention.

Claims

1. A landing gear upper lock mechanism, comprising a pull ring (1) connected to the landing gear, a lock housing (2), and an unlocking actuator (3) and a proximity signaler (4) connected to the lock housing (2), characterized in that: A lock hook (5) and an unlocking tension spring (6) connected to the lock hook (5) are provided in the lock housing (2); a stop block (7) capable of pushing the lock hook (5) and a compression spring (8) connected to the stop block (7) are also provided in the lock housing (2); the stop block (7) comprises a signal contact block (71) which rotates coaxially in an integral manner, a limiting protrusion (72) and a manual unlocking pull rod (73); One end of the compression spring (8) is connected to the lock housing (2), and the other end is connected to the stop block (7) via a limiting protrusion (72). A lock hook groove (51) capable of locking the pull ring (1) is also provided on the lock hook (5). Under the action of the pull ring (1), the lock hook (5) drives the stop block (7) to rotate, and the manual unlocking pull rod (73) contacts or separates from the unlocking actuator (3) to achieve locking or unlocking of the upper lock mechanism, and the signal contact block (71) contacts the proximity signal device (4) to feedback the position signal.

2. A landing gear uplock mechanism according to claim 1, characterized in that: A first connecting shaft (21) and a second connecting shaft (22) are provided in the lock housing (2); the lock hook (5) is rotatably connected to the lock housing (2) via the first connecting shaft (21); and the stop block (7) is rotatably connected to the lock housing (2) via the second connecting shaft (22); a stop limit block (74) is also provided in the stop block (7) for integral and coaxial rotation; the stop block (7) and the lock hook (5) are in contact and connected via the stop limit block (74).

3. A landing gear uplock mechanism according to claim 2, characterized in that: The locking hook groove (51) is located on the locking hook (5) at the lower side of the first connecting shaft (21), and the locking hook groove (51) is arranged in a U-shaped groove structure, and is used to guide and limit the pull ring (1).

4. A landing gear uplock mechanism according to claim 3, characterized in that: The unlocking actuator cylinder (3) comprises a normal unlocking actuator cylinder (31) and an emergency unlocking actuator cylinder (32), wherein the normal unlocking actuator cylinder (31) and the emergency unlocking actuator cylinder (32) both comprise an actuator cylinder body and a push rod (33) connected to the actuator cylinder body, wherein the normal unlocking actuator cylinder (31) and the emergency unlocking actuator cylinder (32) are respectively connected to the lock housing (2) via corresponding push rods (33), wherein the emergency unlocking actuator cylinder (32) ) is located above the normal unlocking actuator (31), the push rod (33) and the manual unlocking rod (73) in the stop block (7) are spaced a predetermined distance apart, and the lock hook (5) drives the stop block (7) to rotate under the action of the pull ring (1), and the upper locking mechanism is locked or unlocked by the manual unlocking rod (73) contacting or separating with the push rod (33), and the signal contact block (71) contacts with the proximity signal device (4) to feedback the position signal.

5. A landing gear uplock mechanism according to claim 4, characterized in that: The proximity signaler (4) comprises a signaler body and a signal connecting rod (41) connected to the signaler body, wherein the proximity signaler (4) is connected to the lock housing (2) via the signal connecting rod (41), wherein the proximity signaler (4) is located above the emergency unlocking actuator (32), the signal connecting rod (41) and the signal contacting block (71) in the stop block (7) are spaced apart by a predetermined distance, the stop block (7) contacts or separates from the signal connecting rod (41) in the proximity signaler (4) via the signal contacting block (71), and when the signal contacting block (71) contacts the signal connecting rod (41), a signal feedback of the upper locking mechanism being locked in place is realized.

6. The landing gear uplock mechanism according to claim 1, characterized in that: One end of the unlocking tension spring (6) is in contact with and connected to the lock hook (5), and the other end is fixed to the lock housing (2).

7. The landing gear uplock mechanism according to claim 1, characterized in that: The manual unlocking pull rod (73) in the stop block (7) extends to the outside of the lock housing (2), and an opening corresponding to the manual unlocking pull rod (73) is provided in the lock housing (2).

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