Manual unlocking structure of landing frame supporting rod lock

Abstract

The utility model discloses a manual unlocking structure of a landing frame stay bar lock, which comprises a shell, the shell is fixed on a groove for installing the stay bar lock, a bolt is installed on an end cover of the shell, the bolt comprises a head part and a screw rod, the head part is exposed outside the end cover, the screw rod penetrates through the end cover, and the end cover is fixed on the shell. An unlocking device is installed on the screw rod through threads, and a lock head of the unlocking device is used for being connected with an unlocking hole of a lock pin of a supporting rod lock. The anti-theft lock is simple in overall structure, high in reliability, easy and convenient to operate and high in safety, and the manual unlocking difficulty is effectively reduced through physical operation verification.

Description

Technical Field

[0001] The utility model relates to an aircraft landing gear structure, in particular to a landing gear strut lock manual unlocking structure. Background Art

[0002] As shown in Chinese Patent CN104354853A, when the landing gear is lowered, high-pressure gas opens the upper lock and simultaneously drives the actuator to lower the landing gear. Once fully lowered, the actuator maintains high pressure, continuously delivering load to stabilize the front landing gear in the lowered position. Simultaneously, the strut lock incorporates a latch lock. When the upper and lower struts move to the lowered position, spring force forces the locking pin in the upper strut into the square hole in the lower strut. When the actuator is functioning properly to lock the landing gear in the lowered position, clearances are maintained between the stoppers of the upper and lower struts and between the locking pin and the locking pin hole. This prevents overconstraint between the locking mechanism's and the actuator's limits, protecting the upper and lower struts from the impact loads generated during lowering. If the actuator fails and cannot provide a stable load output in the lowered position, the upper and lower struts deflect downward, and the stoppers engage to prevent the compression load. At the same time, when the strut is pulled straight, the lower end of the lock pin fits into the lower end of the lock pin hole, preventing the strut from bending in the opposite direction. It can be seen that when the actuator fails, the strut lock can still lock the landing gear in the lowered position and bear the load.

[0003] Currently, when performing ground maintenance on landing gear struts, manual unlocking of the strut lock involves threading a wire through the unlocking hole of the strut lock pin. The wire is then manually pulled outward, overcoming the pressure of a spring to force the pin out of the hole. This release of the pin completes the strut unlocking process. Due to the high locking force, manual unlocking is difficult and can easily cause injury to the strut lock and the operator. Therefore, a manual unlocking mechanism is needed to easily unlock the strut lock. Utility Model Content

[0004] The utility model aims to provide a manual unlocking structure of a landing gear strut lock in response to the demand for manual unlocking of a landing gear strut lock on the ground.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A manual unlocking structure for a landing gear strut lock comprises an outer shell, which is fixed on a groove for installing the strut lock. A bolt is installed on the end cover of the outer shell. The bolt comprises a head and a screw. The head is exposed outside the end cover. The screw passes through the end cover, and an unlocker is threadedly installed on the screw. The locking head of the unlocker is used to connect with the unlocking hole of the strut lock pin.

[0007] Preferably, the head and the screw are integrally formed.

[0008] Preferably, the unlocking device includes a first pull rod and a second pull rod, each of which has one end threadedly connected to the screw rod and the other end provided with the locking head, and the locking head of the first pull rod and the locking head of the second pull rod are arranged opposite each other. In this way, the locking heads of the first pull rod and the second pull rod of the unlocking device can be inserted into the unlocking hole from both ends, making it suitable for installation and use in small spaces.

[0009] Preferably, the length of the first pull rod is greater than the length of the second pull rod, so that the first pull rod, the second pull rod and the screw rod of the bolt are connected sequentially.

[0010] Preferably, the head is a nut, and the head is threadedly connected to one end of the screw, and the other end of the screw is integrally formed with the unlocking device to further simplify the structure of the present invention.

[0011] Preferably, a gasket is provided between the head and the end cover to protect the outer shell and prevent the outer shell from being worn.

[0012] Preferably, the end cover is a T-shaped structure, a through hole is provided in the middle of the end cover, and the screw rod passes through the through hole and is connected to the unlocking device, so that the bolt installation of the utility model is more stable and reliable.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1) The present invention adopts a threaded connection between a bolt and a lock opener. In this way, when the bolt head is rotated, since the outer shell is fixed on the groove for installing the strut lock, the bolt can only rotate relative to the outer shell. Therefore, the lock opener threadedly connected thereto will inevitably move the lock pin of the strut lock along the axial direction of the bolt and disengage from the lock hole to achieve unlocking. Obviously, the present invention uses the principle of the screw-nut mechanism to reduce the difficulty of manual unlocking, and the threaded combination has a self-locking function, so the operator does not need to apply continuous force during the unlocking process.

[0015] 2) The utility model has a simple overall structure, high reliability, easy operation and high safety. After actual operation verification, the utility model effectively solves the problem of difficulty in manually unlocking the support rod lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1This is a diagram of the use state of Example 1 of the utility model;

[0018] Figure 2 This is a structural diagram of Example 1 of the present utility model;

[0019] Figure 3 This is an exploded view of the structure of Example 1 of the present utility model;

[0020] Figure 4 This is a cross-sectional view of the locked state of Example 1 of the present utility model;

[0021] Figure 5 This is a cross-sectional view of the unlocked state of Example 1 of the present utility model;

[0022] Figure 6 This is a diagram of the use state of Example 2 of the utility model;

[0023] Figure 7 This is a structural diagram of Example 2 of the present utility model;

[0024] Figure 8 This is an exploded view of the structure of Example 2 of the present utility model;

[0025] Figure 9 This is a cross-sectional view of the locked state of Example 2 of the present utility model;

[0026] Figure 10 This is a cross-sectional view of the unlocked state of Example 2 of the present utility model;

[0027] In the figure: 1-housing, 2-first pull rod, 3-second pull rod, 4-end cover, 5-washer, 6-bolt, 7-support rod lock, 8-groove, 9-head, 10-screw, 11-unlocker, 12-locking head, 13-unlocking hole, 14-through hole, 15-mounting bracket, 16-connecting rod. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] See also Figure 1 - Figure 5 , Embodiment 1 of the manual unlocking structure of the landing gear strut lock of the present invention includes a shell 1, which is fixed on the groove 8 for installing the strut lock 7, and a bolt 6 is installed on the end cover 4 of the shell 1. The bolt 6 includes a head 9 and a screw 10, and the head 9 is exposed outside the end cover 4. The screw 10 passes through the end cover 4, and an unlocker 11 is threadedly installed on the screw 10. A lock head 12 is provided on the unlocker 11, and the lock head 12 is used to connect with the unlocking hole 13 of the strut lock pin.

[0032] In this embodiment, the head 9 and the screw 10 are integrally formed; the unlocker 11 includes a first pull rod 2 and a second pull rod 3, the length of the first pull rod 2 is greater than the length of the second pull rod 3, and one end of the first pull rod 2 and the second pull rod 3 are respectively connected to the screw 10 through threads in sequence, and the other end is respectively provided with the locking head 12, the locking head 12 of the first pull rod 2 and the locking head 12 of the second pull rod 3 are arranged opposite to each other, and the locking heads 12 of the first pull rod 2 and the second pull rod 3 are respectively inserted into the unlocking hole 13 from both ends of the unlocking hole 13 to realize connection with the unlocking hole 13.

[0033] In order to protect the housing 1 and prevent the housing 1 from being worn, a gasket 5 is provided between the head 9 and the end cover 4 .

[0034] In order to make the installation of the bolt 6 more stable and reliable, the end cover 4 adopts a T-shaped structure, and a through hole 14 is provided in the middle of the end cover 4. The screw 10 passes through the through hole 14 and is threadedly connected to the first pull rod 2 and the second pull rod 3.

[0035] When the landing gear strut lock is in the lower locked state, the second and first rods 3 and 2 can be sequentially inserted into the unlocking holes 13 of the strut lock pins. The second and first rods 3 and 2 are then passed through the housing 1. The housing 1 is secured to the groove 8 of the upper strut mounting strut lock. The end cap 4 is then installed. The bolt 6 is then sequentially passed through the washer 5, the end cap 4, the first and second rods 2 and 3. Since the first and second rods 2 and 3 are threadedly engaged with the bolts 6, when the bolts 6 are tightened with a hexagonal socket wrench, the bolts 6 can only rotate. Therefore, the first and second rods 2 and 3 together drive the strut lock pins toward the head 9 of the bolts 6, thus achieving the manual unlocking function.

[0036] See also Figure 6 - Figure 10 The structure of the second embodiment of the manual unlocking structure of the landing gear strut lock of the present invention is roughly the same as that of the first embodiment, except that: the bolt 6 is not an integrated structure, the head 9 is a nut, and the head 9 is threadedly connected to one end of the screw 10, and the other end of the screw 10 is integrally formed with the unlocking device 11; the outer shell 1 is replaced with a mounting bracket 15.

[0037] When the landing gear strut lock is in the lower locked state, the lock head of the unlocking device 11 is inserted into the connecting rod 16 installed in the unlocking hole 13 of the strut lock pin. The mounting bracket 15 passes through the screw 10 and is fixed to the groove 8 of the upper strut mounting strut lock. Because the nut and screw 10 are threaded together, when the nut is tightened with a hexagonal wrench, the screw 10 drives the unlocking device 11 toward the nut, thereby realizing the manual unlocking function.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification of the above embodiment made in accordance with the essence of the present invention without departing from the content of the present invention should fall within the scope of protection of the present invention.

Claims

1. A landing gear strut lock manual unlocking structure, comprising a housing fixed to a groove for mounting the strut lock, characterized in that: A bolt is installed on the end cover of the shell, and the bolt includes a head and a screw rod. The head is exposed outside the end cover, the screw rod passes through the end cover, and an unlocker is threadedly installed on the screw rod. The locking head of the unlocker is used to connect with the unlocking hole of the support rod lock pin.

2. The manual unlocking structure of the landing gear strut lock according to claim 1, characterized in that: The head and the screw are integrally formed.

3. The manual unlocking structure of the landing gear strut lock according to claim 2, characterized in that: The unlocking device includes a first pull rod and a second pull rod, one end of the first pull rod and the second pull rod are respectively connected to the screw rod via threads, and the other end is respectively provided with the locking head, and the locking head of the first pull rod and the locking head of the second pull rod are arranged opposite to each other.

4. The manual unlocking structure for the landing gear strut lock according to claim 3, characterized in that: The length of the first pull rod is greater than the length of the second pull rod.

5. The manual unlocking structure for the landing gear strut lock according to claim 1, characterized in that: The head is a nut, and the head is threadedly connected to one end of the screw, and the other end of the screw is integrally formed with the unlocking device.

6. The landing gear strut lock manual unlocking structure according to any one of claims 1 to 5, characterized in that: A gasket is provided between the head and the end cover.

7. The landing gear strut lock manual unlocking structure according to any one of claims 1 to 5, characterized in that: The end cover is a T-shaped structure, a through hole is provided in the middle of the end cover, and the screw passes through the through hole and is connected to the unlocking device.

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