Aircraft pallet locking device
By designing an aircraft cargo pallet locking device that uses over-dead point connecting rod mechanism and torsion spring to assist, the problem of drone cargo holds small width and needing automatic locking and unlocking is solved, and the functions of automatic and manual switching are realized to adapt to application needs in different environments.
Patent Information
- Application Number
- CN202510060856.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-03-07
AI Technical Summary
The existing cargo pallet locking device is difficult to meet the needs of low-altitude cargo drones, especially when the cargo hold width is small, automatic locking and unlocking cannot be achieved. Some drones require airdrop function and are designed in complex.
An aircraft cargo pallet locking device is designed, using a dead-point connecting rod mechanism combined with torsion spring to achieve automatic locking and unlocking functions; at the same time, it provides the choice of manual handles and electric servo to meet the needs of manual and automatic switching.
It realizes the functions of automatic locking and unlocking, adapts to the needs of small cargo holds for drones, simplifies operating procedures, and supports applications in different environments.
Smart Images
Figure CN119568412A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of air cargo transportation, and in particular to a locking device for an aircraft cargo tray. Background Art
[0002] Existing pallet locking devices are mainly used to lock cargo holds or cargo pallets of civil aircraft. They work together with guide rails, rollers, mooring blocks, etc. to limit the position of the pallet, allowing cargo operators to enter the cargo hold to operate. Foreign civil aircraft have relatively mature applications of pallet locking technology. With the development of low-altitude cargo drones, the width of their cargo holds is small. After loading the cargo, personnel cannot enter the cargo hold to operate the locking device. Some drones also need to have airdrop functions. It is necessary to design an aircraft pallet locking device that can be locked and unlocked automatically or manually. Summary of the invention
[0003] The object of the present invention is to provide an aircraft cargo tray locking device, which has the advantage of being able to automatically lock and unlock.
[0004] The above technical objectives of the present invention are achieved through the following technical solutions: an aircraft cargo pallet locking device, comprising a lock box, a rolling rod is installed at the front of the lock box, a lock tongue is installed at the rear of the lock box through a hinge shaft, connecting rods are provided on both sides of the lock tongue, the lock tongue is connected to the two connecting rods through the hinge shaft, a large torsion spring is provided on one side of the lock tongue, two support arms are provided on the front side of the lock tongue, the side of the connecting rod close to the support arm is rotatably connected to the support arm, a support arm shaft is installed inside the support arm, the support arm is connected to the lock box through the support arm shaft, a small torsion spring is provided on the support arm shaft, and unlocking pins are clamped at both ends of the support arm shaft.
[0005] By adopting the above technical solution, through the use of an over-dead point connecting rod mechanism combined with a torsion spring assist, two usage states of locking and unlocking can be achieved; and the use of a manual handle and an electric servo requires switching between manual locking and unlocking and automatic locking and unlocking.
[0006] The present invention is further configured as follows: the handle is a manual handle or an electric servo a; and the unlocking pin is connected to the handle via a spring pin.
[0007] By adopting the above technical solution, through the setting of the electric servo, the electric servo can realize unlocking / locking through electric drive, and feedback the state of the lock, and send a signal to the central computer, so as to determine whether the pallet is in a locked state.
[0008] The present invention is further configured such that: the lock tongue is one of a lock tongue 1 without a vertical limiting function or a lock tongue 2 with a vertical limiting function.
[0009] By adopting the above technical solution, the vertical movement of the pallet can be restricted by setting the second locking tongue with a vertical limiting function.
[0010] The present invention is further configured such that: when the lock tongue is in an unlocked state, its bottom does not contact the bottom of the inner cavity of the lock box; when the lock tongue is in a locked state, its bottom contacts the bottom of the inner cavity of the lock box, and the support arm supports the front of the lock tongue.
[0011] By adopting the above technical solution, when the lock tongue is in the unlocked state, its bottom does not contact the lock box, so that the lock tongue can rotate; when the lock tongue is in the locked state, its bottom contacts the bottom of the inner cavity of the lock box, which plays a role in limiting the course.
[0012] The present invention is further configured such that: the surface of the unlocking pin is rotationally connected to the interior of the lock box.
[0013] By adopting the above technical solution, the unlocking pin can be connected to the support arm shaft through the setting of the unlocking pin, and the unlocking pin and the lock box are rotatably connected to allow the lock box to be installed outside the lock box.
[0014] The present invention is further configured such that: the force value of the large torsion spring installed at the locking tongue rotating shaft is greater than the force value of the small torsion spring installed at the support arm shaft.
[0015] By adopting the above technical solution, the lock tongue is always in the unlocked state under the action of the torsion spring force. When the unlocking handle is turned and the connecting rod rotates past the dead point, the torsion spring force can automatically restore the lock tongue to the unlocked state.
[0016] In summary, the present invention has the following beneficial effects: The present invention adopts an over-dead point connecting rod mechanism combined with a torsion spring assist to achieve two usage states of locking and unlocking; and the manual handle and the electric steering gear can be switched as needed, which can meet the switching of manual locking and unlocking and automatic locking and unlocking of the device; and meet the application requirements of the device in different environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of locking the structure of the present invention; Figure 2 It is an exploded view of the structure of the present invention; Figure 3 It is a schematic diagram of unlocking the structure of the present invention; Figure 4 It is a schematic diagram of the lock tongue structure with vertical limiting function of the present invention.
[0018] Figure numerals: 1, lock box; 2, rolling rod; 3, handle; 3a, servo; 4, support arm; 5, support arm shaft; 6, lock tongue; 6a, lock tongue 2; 7, connecting rod; 8, unlocking pin; 9, large torsion spring; 10, small torsion spring. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below in conjunction with the accompanying drawings.
[0020] Embodiment 1: refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an aircraft cargo pallet locking device comprises a lock box 1, a rolling rod 2 is installed at the front of the lock box 1, a lock tongue 6 is installed at the rear of the lock box 1 through a hinge shaft, connecting rods 7 are arranged on both sides of the lock tongue 6, the lock tongue 6 is connected to the two connecting rods 7 through the hinge shaft, a large torsion spring 9 is arranged on one side of the lock tongue 6, and two support arms 4 are arranged on the front side of the lock tongue 6, and the side of the connecting rod 7 close to the support arm 4 is rotatably connected to the support arm 4, a support arm shaft 5 is installed inside the support arm 4, the support arm 4 is connected to the lock box 1 through the support arm shaft 5, a small torsion spring 10 is arranged on the support arm shaft 5, and unlocking pins 8 are clamped at both ends of the support arm shaft 5; by adopting an over-dead point connecting rod mechanism and combining with torsion spring assistance, two use states of locking and unlocking can be realized; and 3 and an electric steering gear 3a can be used for switching according to needs, which can meet the switching of manual locking, unlocking and automatic locking and unlocking of the device; and meet the application requirements of the device in different environments.
[0021] Furthermore, the handle 3 is a manual handle or an electric servo 3a; the unlocking pin 8 is connected to the handle 3 through a spring pin; through the setting of the electric servo, the electric servo can unlock / lock through electric drive, and feedback the state of the lock, and give a signal to the central computer, so as to determine whether the pallet is in a locked state.
[0022] Furthermore, the locking tongue 6 is one of a locking tongue 1 without a vertical limiting function or a locking tongue 2 6a with a vertical limiting function; by setting the locking tongue 2 with a vertical limiting function, the vertical movement of the pallet can be constrained.
[0023] Furthermore, when the lock tongue 6 is in the unlocked state, its bottom does not contact the bottom of the inner cavity of the lock box 1; when the lock tongue 6 is in the locked state, its bottom contacts the bottom of the inner cavity of the lock box 1, and the support arm 4 supports the front of the lock tongue 6; when the lock tongue is in the unlocked state, its bottom does not contact the lock box, so that the lock tongue can rotate; when the lock tongue 6 is in the locked state, its bottom contacts the bottom of the inner cavity of the lock box 1, which plays a role in limiting the heading.
[0024] Furthermore, the surface of the unlocking pin 8 is rotatably connected to the interior of the lock box 1; through the setting of the unlocking pin, the unlocking pin and the support arm shaft can be connected, and the unlocking pin and the lock box rotation connection can be located outside the lock box and installed.
[0025] Furthermore, the force value of the large torsion spring 9 installed at the rotating shaft of the lock tongue 6 is greater than the force value of the small torsion spring 10 installed at the support arm shaft 5; the lock tongue 6 is always in an unlocked state under the action of the torsion spring force. When the unlocking handle 3 is turned and the connecting rod 7 rotates past the dead point, the torsion spring force can automatically restore the lock tongue 6 to the unlocked state.
[0026] Brief description of the usage process: In the locked state, it can withstand forward or backward loads and limit the movement of the cargo pallet in the direction of travel.
[0027] According to the use requirements, the lock tongue 1 without vertical limit function is changed to the lock tongue 2 6a with vertical limit function, which can bear the vertical load in addition to the heading load.
[0028] In the unlocked state, the lock tongue 6 is driven by the connecting rod mechanism to be stored in the inner space of the lock box 1, so that the cargo tray can move on the roller 2 in the same direction.
[0029] Unlocking / locking can be done manually by using the manual handle.
[0030] After the manual handle is replaced with an electric steering gear 3a, unlocking / locking can be achieved through electric drive, and the lock status can be fed back and the signal can be sent to the central computer to determine whether the cargo pallet is in a locked state, thereby realizing cargo airdrop. The specific operation of this device is as follows; The installation interface between the device and the machine body structure is on the lock box 1; the lock tongue 1 without vertical limiting function and its connecting rod mechanism are installed on the lock box 1.
[0031] In the unlocked state, the manual handle is turned to drive the unlocking pin 8, the unlocking pin 8, and the support arm 4 to rotate, driving the connecting rod 7 installed on the support arm 4, and driving the lock tongue without vertical limit function to move from the unlocked state to the locked state. After the lock tongue without vertical limit function is locked in place, the connecting rod 7 passes the dead point to form a self-locking state. Under the support of the support arm 4, the lock tongue without vertical limit function contacts the support platform on the lock box 1 with its bottom, so that the lock tongue without vertical limit function can withstand loads in both the forward and reverse directions.
[0032] According to the use requirements, the lock tongue 1 without vertical limit function can be replaced with the lock tongue 2 6a with vertical limit function, which can restrict the vertical movement of the pallet.
[0033] The manual handle is replaced with an electric steering gear 3a. After the electric steering gear 3a is powered on, it can realize automatic locking and unlocking. At the same time, the electric steering gear 3a can output a locking / unlocking in place signal to realize automatic locking / unlocking.
[0034] In summary, the present invention realizes locking / unlocking of the lock tongue 6 through the support arm 4 and the connecting rod mechanism installed between the support arm 4 and the lock tongue 6. In the locked state, the connecting rod mechanism passes the dead point, forming a self-locking lock tongue; in the unlocked state, the torsion spring torque makes the lock tongue always in the unlocked position; By switching the locking tongue 6 with various configurations, the heading limit or heading / vertical limit function can be realized; The locking device can be automatically / manually unlocked and locked by driving the electric steering gear 3a or the manual handle.
[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.
Claims
1. An aircraft cargo pallet locking device, comprising a lock box (1), characterized in that: A rolling rod (2) is installed at the front of the lock box (1), and a lock tongue (6) is installed at the rear of the lock box (1) via a hinge shaft. Connecting rods (7) are provided on both sides of the lock tongue (6). The lock tongue (6) is connected to the two connecting rods (7) via the hinge shaft. A large torsion spring (9) is provided on one side of the lock tongue (6). Two support arms (4) are provided at the front side of the lock tongue (6). The side of the connecting rod (7) close to the support arm (4) is rotatably connected to the support arm (4). A support arm shaft (5) is installed inside the support arm (4). The support arm (4) is connected to the lock box (1) via the support arm shaft (5). A small torsion spring (10) is provided on the support arm shaft (5). Both ends of the support arm shaft (5) are clamped with unlocking pins (8).
2. The aircraft cargo pallet locking device according to claim 1, characterized in that: The handle (3) is one of a manual handle and an electric steering gear (3a); The unlocking pin (8) is connected to the handle (3) via a spring pin.
3. The aircraft cargo pallet locking device according to claim 1, characterized in that: The locking tongue (6) is one of a locking tongue 1 without a vertical limiting function or a locking tongue 2 (6a) with a vertical limiting function.
4. The aircraft cargo pallet locking device according to claim 1, characterized in that: When the lock tongue (6) is in an unlocked state, its bottom does not contact the bottom of the inner cavity of the lock box (1); when the lock tongue (6) is in a locked state, its bottom contacts the bottom of the inner cavity of the lock box (1), and the support arm (4) supports the front of the lock tongue (6).
5. The aircraft cargo pallet locking device according to claim 1, characterized in that: The surface of the unlocking pin (8) is rotationally connected to the interior of the lock box (1).
6. The aircraft cargo pallet locking device according to claim 1, characterized in that: The force value of the large torsion spring (9) installed at the rotating shaft of the locking tongue (6) is greater than the force value of the small torsion spring (10) installed at the support arm shaft (5).