A traction lock device based on air-drop integrated pallet

Abstract

The application discloses a traction lock device based on air transportation and air drop integrated pallet, the traction lock device is installed on the pallet, and an unlocking trigger device is further installed on the pallet and connected with the traction lock device through a pull wire; the traction lock device comprises a lock body assembly and a traction connector; the top end of the traction connector is connected with a main parachute guide parachute of a landing main parachute, the bottom end is connected with a traction parachute, and the side end of the traction connector is provided with an unlocking clamping groove with an upward opening and a tiger tooth groove with a downward opening; the lock body assembly is engaged with the tiger tooth groove of the traction connector and cooperated with the unlocking clamping groove of the traction connector; when the lock body assembly is actuated, the unlocking of the traction connector can be realized, the traction connector, the traction parachute and the main parachute guide parachute are separated, and the landing main parachute is pulled to open; the present application is based on the existing standardized pallet, and with the existing air drop parachute and other equipment, 5t-level heavy air drop can be realized, and the air transportation and air drop problem of small tonnage is solved.

Description

Technical Field

[0001] This invention belongs to the field of air container transportation technology, specifically relating to a towing lock device based on an integrated air transport and airdrop pallet. Background Technology

[0002] Currently, my country's heavy-duty airdrop equipment is mainly divided into 10t and 21t classes. This equipment can only be used for airdrop and cannot achieve integrated transport and delivery. Existing 5t-class freight platforms are mainly B6P container pallets. These pallets lack airdrop-compatible locking devices, umbrellas, and cushioning mechanisms. The interfaces and local strength of the pallet itself are unsuitable for airdrop; they can only be used for containerized freight. Therefore, it is necessary to optimize and improve the B6P container pallet, starting with the 5t-class airdrop platform, to meet the requirements of integrated transport and delivery. Summary of the Invention

[0003] In view of this, the present invention provides a towing lock device based on an integrated air transport and airdrop pallet. Based on existing standardized pallets and with the help of existing airdrop parachutes and other equipment, it can achieve 5-ton heavy-load airdrop and solve the problem of air transport and airdrop of small tonnage items.

[0004] This invention is achieved through the following technical solution:

[0005] A towing lock device based on an integrated air transport and airdrop pallet, wherein the towing lock device is installed on the pallet, and an unlocking trigger device is also installed on the pallet, and the unlocking trigger device is connected to the towing lock device via a pull cable;

[0006] The traction lock device includes: a lock body assembly and a traction connector;

[0007] The top of the towing connector is connected to the main parachute and the pilot parachute of the main parachute, and the bottom is connected to the towing parachute. One side of the towing connector is machined with an unlocking slot that opens upward and a tiger tooth groove that opens downward.

[0008] The lock body assembly includes: a bolt mechanism, a locking and safety mechanism, and a lock housing;

[0009] One side of the lock housing is mounted on the tray via mounting base A, and the other opposite side is provided with a tiger tooth structure. The side end of the traction connector is mounted on the tiger tooth structure of the lock housing, and the tiger tooth groove of the traction connector engages with the tiger tooth structure, allowing the traction connector to slide out smoothly from the lock housing.

[0010] Both the locking safety mechanism and the locking tongue mechanism are installed inside the lock housing. The locking tongue mechanism is located below the locking safety mechanism. The locking safety mechanism adopts a swing-type structure, and the locking tongue mechanism adopts a four-bar linkage mechanism. The locking safety mechanism is connected to the pull cable, and the locking tongue mechanism cooperates with the unlocking slot of the traction connector to achieve engagement with the traction connector. When the pull cable pulls the locking safety mechanism, the locking tongue mechanism can be separated from the traction connector, and the traction connector, traction parachute, main parachute, and guide parachute can be disengaged, pulling the main parachute to open.

[0011] Furthermore, the traction joint includes: a guide ring, a safety buckle, and a traction ring;

[0012] The traction ring has an L-shaped structure; a locking hook is machined at the top of the vertical part of the L-shaped structure, the bottom of the guide ring is installed in the locking hook, and a round hole is machined at the top of the guide ring for connecting with the main parachute and the guide parachute of the main parachute; the opening of the locking hook is closed by a rotatable safety buckle; the safety buckle is installed on the traction ring by a pin E, and the safety buckle can rotate around the axis of the pin E.

[0013] The bottom of the vertical part of the L-shaped structure is machined with a round mounting hole for connecting to a towing parachute;

[0014] The upper surface of the horizontal portion of the L-shaped structure is machined with an upward-opening unlocking slot, which cooperates with the lock body assembly to enable quick locking and unlocking of the lock body assembly; the lower surface of the horizontal portion of the L-shaped structure is machined with a downward-opening tiger tooth groove.

[0015] Furthermore, the locking mechanism includes: a pull cable connector, a locking rocker arm, an unlocking rocker arm, and a pull cable rocker arm;

[0016] One end of the unlocking rocker arm is pinned to the lock housing via a pin A; the unlocking rocker arm can rotate around the axis of the pin A; the other end of the unlocking rocker arm is provided with a downward-facing triangular prism-shaped limiting boss; a guide rod is fixedly connected to the middle of the unlocking rocker arm, and the guide rod is slidably engaged with an arc-shaped guide groove A machined on the lock housing, the arc of which is centered on the axis of the pin A;

[0017] One end of the locking rocker arm is bolted to the lock housing, and the locking rocker arm can rotate around the axis of the bolt. One end face of the other end of the locking rocker arm is provided with a guide cylinder, which slides in fit with an arc-shaped guide groove B machined on the lock housing. The arc of the arc-shaped guide groove B is centered on the axis of the bolt. The other end face of the other end of the locking rocker arm is machined with an open slot, which can cooperate with the guide rod of the unlocking rocker arm. When the guide rod of the unlocking rocker arm is located in the open slot, the unlocking rocker arm is locked. When the guide rod of the unlocking rocker arm is not located in the open slot, the unlocking rocker arm is unlocked.

[0018] The pull-cord rocker arm has a double-layer side plate structure, with each side plate being a V-shaped structure and the included angle of the V-shape being an obtuse angle. One side plate of the pull-cord rocker arm is located between the unlocking rocker arm and the locking rocker arm, while the other side plate is located between the unlocking rocker arm and the lock housing. One end of the pull-cord rocker arm is pinned to the end of the unlocking rocker arm via pin B, allowing the pull-cord rocker arm to rotate around the axis of pin B. The other end of the pull-cord rocker arm is pinned to a pull-cord connector. When the locking safety mechanism is not in operation, the pull-cord connector is supported in the mounting groove provided on the upper surface of the unlocking rocker arm, and the pull-cord connector is connected to the pull-cord. A limiting cylinder is provided in the middle of the pull-cord rocker arm, and the limiting cylinder abuts against a limiting protrusion provided on the side of the middle part of the locking rocker arm.

[0019] Furthermore, torsion springs are provided at the pin A of the unlocking rocker arm, the bolt of the locking rocker arm, the pin B of the pull-wire rocker arm, and the pin joint between the pull-wire rocker arm and the pull-wire connector, for the motion reset of each rocker arm.

[0020] Furthermore, the locking tongue mechanism includes: a crank, a connecting rod, a locking tongue rocker arm, and a limiting roller;

[0021] One end of the latch rocker arm is pinned to the lock housing via a pin C; the latch rocker arm can rotate around the axis of the pin C; the other end of the latch rocker arm is provided with a downward trapezoidal limiting boss, which can cooperate with the unlocking slot of the traction ring at the tiger tooth structure of the lock housing. When the trapezoidal limiting boss is located in the unlocking slot, the traction connector is engaged and locked; when the trapezoidal limiting boss is not located in the unlocking slot, the traction connector is released; the middle part of the latch rocker arm is provided with an upward-opening triangular prism-shaped limiting groove, which can cooperate with the triangular prism-shaped limiting boss of the unlocking rocker arm. When the triangular prism-shaped limiting boss of the unlocking rocker arm is located in the triangular prism-shaped limiting groove, the latch rocker arm is locked; when the triangular prism-shaped limiting boss of the unlocking rocker arm is not located in the triangular prism-shaped limiting groove, the latch rocker arm is unlocked, thereby allowing the traction connector to be released.

[0022] One end of the crank is pinned to the lock housing via a pin D; the crank can rotate around the axis of the pin D.

[0023] One end of the connecting rod is pinned to the middle of the locking tongue rocker arm, and the other end of the connecting rod is pinned to the other end of the crank; and a limiting roller is installed on the crank at the connection end with the connecting rod, and the limiting roller is in rolling engagement with the upper surface of the locking tongue rocker arm.

[0024] Furthermore, the mounting base A has a Z-shaped cross-section with a T-shaped groove in the middle; the lock body assembly is mounted on the mounting base A, and one side of the lock body assembly mates with the T-shaped groove on the mounting base A, so as to realize quick installation and removal between the lock body assembly and the mounting base A.

[0025] Furthermore, the lock housing adopts a two-part structure, with the two parts being lock housing one and lock housing two. Lock housing one and lock housing two are connected and fixed together by positioning pins and anti-shear screws to form the lock housing; a T-shaped boss is provided on one outer side of the lock housing, which mates with the T-shaped groove of the mounting base A.

[0026] Beneficial effects:

[0027] (1) The towing lock device of the present invention is installed on the pallet, so that the pallet has an integrated air transport and air drop function; the towing lock device can be quickly connected, locked and fixed when installed, and can be quickly unlocked and separated when airdropped, so that it can achieve 5t heavy load airdrop by towing parachute, and the side guide rail locking port remains unchanged, which improves the mobility of material transportation and has strong practical value.

[0028] (2) The traction cable device of the present invention unlocks the traction joint by adopting a locking safety mechanism with a swing structure and a locking tongue mechanism with a four-bar linkage. The unlocking method is simple, reliable and easy to operate.

[0029] (3) The locking mechanism of the present invention mainly consists of two functions: a locking tongue function and a vibration and shock prevention function. The locking tongue function is mainly limited by the unlocking rocker arm to prevent the locking tongue mechanism from moving and unlocking. The vibration and shock prevention function is mainly limited by the concave and convex structure between the locking rocker arm and the unlocking rocker arm to restrict the unlocking rocker arm from swinging upward without receiving the pulling command of the pull line, thus preventing abnormal unlocking.

[0030] (4) The lock body assembly of the present invention is mounted on the tray by mounting base A. In addition to facilitating the installation of the traction lock device on the tray, it can also increase the force-bearing area and reduce the pressure of the traction force on the tray. Furthermore, the mounting base A and the lock shell of the lock body assembly are installed by the cooperation of T-slot and T-protrusion, which can realize quick disassembly and installation of the two. Attached Figure Description

[0031] Figure 1 This is a diagram showing the relationship between the traction lock device and the tray of the present invention;

[0032] Figure 2 This is a structural diagram of the traction lock device of the present invention;

[0033] Figure 3 and Figure 4 This is a structural diagram of the mounting base A;

[0034] Figure 5 This is a structural diagram of the lock case;

[0035] Figure 6 This is a structural diagram of lock case one;

[0036] Figure 7Here is a structural diagram of lock case two;

[0037] Figure 8 Here is a structural diagram of the traction joint;

[0038] Figure 9 and Figure 10 This is a structural diagram of the lock body assembly;

[0039] Figure 11 and Figure 12 This is a structural diagram of the locking tongue mechanism;

[0040] Figure 13 This is a structural diagram of the locking tongue rocker arm;

[0041] Figure 14 Here is a structural diagram of the crank;

[0042] Figure 15 Here is a structural diagram of the connecting rod;

[0043] Figure 16 and Figure 17 To establish the structural composition diagram of the insurance institution;

[0044] Figure 18 This is a structural diagram of a pull wire connector;

[0045] Figure 19 Structural diagram for unlocking the rocker arm;

[0046] Figure 20 A structural diagram of the locking rocker arm;

[0047] Figure 21 This is a structural diagram of the pull-wire rocker arm;

[0048] Figure 22 A structural diagram of the unlocking trigger device;

[0049] Figure 23 This is a structural diagram of the base;

[0050] Figure 24 This is a structural diagram of the guy wire mounting bracket;

[0051] Figure 25 This is a structural diagram of the triggering mechanism;

[0052] Figure 26 A structural diagram of the actuator;

[0053] Figure 27 This is a structural diagram of the slider;

[0054] Among them, 1-tray, 2-traction lock device, 3-unlock trigger device, 4-pull cable;

[0055] 5-Mounting base A, 6-Lock body assembly, 7-Traction connector, 8-Crank, 9-Connecting rod, 10-Lock tongue rocker arm, 11-Limiting roller, 12-Limiting sleeve B, 13-Lock housing one, 14-Lock housing two, 15-Pull cable connector, 16-Locking rocker arm, 17-Unlocking rocker arm, 18-Pull cable rocker arm, 19-Limiting sleeve A, 20-Open slot, 21-Guide ring, 22-Safety buckle, 23-Pin E, 24-Traction ring, 25-Tiger tooth structure;

[0056] 26-Pull cable mounting base, 27-Trigger mechanism, 28-Base, 29-Actuator, 30-Adjusting screw, 31-Locking nut, 32-Locking groove, 33-Trigger mechanism mounting hole, 34-Rectangular guide hole, 35-Hook, 36-Roller, 37-Compression spring, 38-Connecting bracket, 39-Locking block, 41-Slider, 42-Tension spring, 43-Pull block, 44-Pull rope, 45-Pull ring, 411-Stop groove, 412-Pull cable head mounting groove. Detailed Implementation

[0057] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0058] This embodiment provides a towing lock device based on an integrated air transport and airdrop pallet, see attached document. Figure 1 The traction lock device 2 is installed on the tray 1, and the tray 1 is also equipped with an unlocking trigger device 3, which is connected to the traction lock device 2 via a pull wire 4.

[0059] The towing lock device 2 is also connected to the towing parachute and the main parachute respectively. The towing lock device 2 is used to lock the tray 1 on the aircraft before airdrop. During airdrop, the tray 1 is pulled out of the cabin by the towing force of the towing parachute. Under the control of the unlocking trigger mechanism 3, the towing lock device 2 is unlocked by the pull line 4, so that the tray 1 is separated from the towing parachute and the main parachute is opened at the same time.

[0060] See Appendix Figure 2 The traction lock device 2 includes: a mounting base A5, a lock body assembly 6, and a traction connector 7;

[0061] See appendix Figure 3-4The mounting base A5 is used for mounting the traction lock device 2 on the tray 1. It is installed in the middle of the long side frame (i.e., the traction side frame) of the tray 1 using 10 M8 high-strength bolts (6 M8 high-strength bolts are installed on the vertical surface of the tray 1 frame, and 4 M8 high-strength bolts are installed on the flange of the tray 1 frame). Besides facilitating the installation of the traction lock device 2 on the tray 1, the mounting base A5 also increases the force-bearing area and reduces the pressure of the traction force on the tray 1. The mounting base A5 has a Z-shaped cross-section with a T-slot in the middle and quick-release pin holes on both sides of the T-slot. The lock body assembly 6 is mounted on the mounting base A5, and one side of the lock body assembly 6 mates with the T-slot on the mounting base A5, enabling quick assembly and disassembly between the lock body assembly 6 and the mounting base A5. The other opposite side of the lock body assembly 6 is detachably connected to the traction connector 7.

[0062] See appendix Figure 8 The traction joint 7 is the link between the traction parachute, the traction lock device 2, and the main parachute, and includes: a guide ring 21, a safety buckle 22, a pin E23, and a traction ring 24;

[0063] The traction ring 24 has an L-shaped structure; a locking hook is machined at the top of the vertical part of the L-shaped structure, the bottom of the guide ring 21 is installed in the locking hook, and a round hole is machined at the top of the guide ring 21 for connecting with the main parachute guide parachute of the main parachute; the opening of the locking hook is closed by a rotatable safety buckle 22, which is used to prevent the guide ring 21 from falling out and to realize the quick release function of the guide ring 21; the safety buckle 22 is installed on the traction ring 24 by a pin E23, and the safety buckle 22 can rotate around the axis of the pin E23;

[0064] The bottom of the vertical part of the L-shaped structure is machined with a round mounting hole for connecting to a towing parachute;

[0065] The upper surface of the horizontal portion of the L-shaped structure is machined with an upward-opening unlocking slot, which cooperates with the lock body assembly 6 to realize quick locking and unlocking of the lock body assembly 6; the lower surface of the horizontal portion of the L-shaped structure is machined with a downward-opening tiger tooth groove.

[0066] The lock body assembly 6 is the core functional component of the entire traction lock device 2. (See Appendix) Figure 9-10 This includes: a locking bolt mechanism, a locking and safety mechanism, and a lock housing;

[0067] See appendix Figure 5-7The lock shell is the mounting base of the entire lock body assembly 6 and also the main bearing body that can withstand a traction force of not less than 2t. In order to facilitate the installation of the lock body assembly 6, the lock shell in this embodiment adopts a two-lobed structure, with the two lobes being lock shell one 13 and lock shell two 14. Lock shell one 13 and lock shell two 14 are fixed together by positioning pins and anti-shear screws to form the lock shell. One outer side of the lock shell is provided with a T-shaped boss, which cooperates with the T-shaped groove of the mounting base A5 to achieve quick disassembly and installation. The other opposite side of the lock shell is provided with a tiger tooth structure 25. The horizontal part of the traction ring 24 of the traction joint 7 is installed on the tiger tooth structure 25 of the lock shell, and the tiger tooth groove on the lower surface of the traction ring 24 engages with the tiger tooth structure 25. The lock body assembly 6 bites the closed ring opening of the traction ring 24, and at the same time, the traction joint 7 can slide out smoothly from the lock shell.

[0068] The locking mechanism is installed inside the lock housing and adopts a swing-type structure. See Appendix. Figure 16-17 It includes: pull cable connector 15, locking rocker arm 16, unlocking rocker arm 17 and pull cable rocker arm 18;

[0069] See appendix Figure 19 One end of the unlocking rocker arm 17 is pinned to the lock housing via a pin A, and each end of the pin A is fitted with a limiting sleeve A19. One end of each limiting sleeve A19 abuts against the unlocking rocker arm 17, and the other end abuts against the inner wall of the lock housing, thereby limiting the unlocking rocker arm 17 in the axial direction of the pin A and preventing the unlocking rocker arm 17 from shaking. The unlocking rocker arm 17 can rotate around the axis of the pin A. The other end of the unlocking rocker arm 17 is provided with a downward triangular prism-shaped limiting boss. A guide rod is fixedly connected to the middle of the unlocking rocker arm 17. The guide rod slides in fit with the arc-shaped guide groove A machined on the lock housing 13. The arc of the arc-shaped guide groove A is centered on the axis of the pin A.

[0070] See appendix Figure 20 One end of the locking rocker arm 16 is bolted to the lock housing pin, and the locking rocker arm 16 can rotate around the axis of the bolt; one end face of the other end of the locking rocker arm 16 is provided with a guide cylinder, which slides in fit with the arc-shaped guide groove B machined on the lock housing 14, and the arc of the arc-shaped guide groove B is centered on the axis of the bolt; the other end face of the other end of the locking rocker arm 16 is machined with an open slot 20, which can cooperate with the guide rod of the unlocking rocker arm 17. When the guide rod of the unlocking rocker arm 17 is located in the open slot 20, the unlocking rocker arm 17 is locked; when the guide rod of the unlocking rocker arm 17 is not located in the open slot 20, the unlocking rocker arm 17 is unlocked.

[0071] See appendix Figure 21The pull-cord rocker arm 18 has a double-layer side plate structure, with each side plate being a V-shaped structure and the included angle of the V-shape being an obtuse angle. One side plate of the pull-cord rocker arm 18 is located between the unlocking rocker arm 17 and the locking rocker arm 16, and the other side plate of the pull-cord rocker arm 18 is located between the unlocking rocker arm 17 and the lock housing 13. One end of the pull-cord rocker arm 18 is pinned to the end of the unlocking rocker arm 17 where the pin A is located via pin B, and the pull-cord rocker arm 18 can rotate around the axis of pin B. The other end of the pull-cord rocker arm 18 is pinned to the pull-cord connector 15. See Appendix. Figure 18 When the locking mechanism is not in operation, the pull cable connector 15 is supported in the mounting groove provided on the upper surface of the unlocking rocker arm 17, and the pull cable connector 15 is connected to the pull cable 4; a limiting cylinder is provided in the middle of the pull cable rocker arm 18, and the limiting cylinder abuts against the limiting protrusion provided on the side of the middle part of the locking rocker arm 16.

[0072] Among them, the pin A of the unlocking rocker arm 17, the bolt of the locking rocker arm 16, the pin B of the pull-wire rocker arm 18, and the pin joint between the pull-wire rocker arm 18 and the pull-wire connector 15 are all equipped with torsion springs for the movement reset of each rocker arm.

[0073] The working principle of the locking mechanism is as follows: When the pull cable 4 pulls the pull cable connector 15, the pull cable connector 15 moves upward, thereby driving the pull cable rocker arm 18 to rotate upward around the axis of pin B. When the pull cable rocker arm 18 rotates upward, it pushes the locking rocker arm 16 to rotate to the right around the axis of the bolt through the limiting cylinder. At this time, the guide rod of the unlocking rocker arm 17 disengages from the opening slot 20, and the unlocking rocker arm 17 is unlocked. When the pull cable connector 15 continues to move upward, the pull cable connector 15 drives the unlocking rocker arm 17 to rotate upward around the axis of pin A. Therefore, the locking mechanism mainly consists of two functions: a locking tongue function and a vibration and shock prevention function. The locking tongue function is mainly achieved by the unlocking rocker arm 17 limiting the movement of the locking tongue mechanism, preventing it from moving to unlock. The vibration and shock prevention function is mainly achieved by the concave and convex structure between the locking rocker arm 16 and the unlocking rocker arm 17, limiting the upward swing of the unlocking rocker arm 17 without receiving the pulling command from the pull cable 4, thus preventing abnormal unlocking.

[0074] See appendix Figure 11-12 The locking tongue mechanism is installed inside the lock housing and located below the locking and safety mechanism. The locking tongue mechanism adopts a four-bar linkage mechanism, including: crank 8, connecting rod 9, locking tongue rocker arm 10 and limiting roller 11.

[0075] See appendix Figure 13One end of the latch rocker arm 10 is pinned to the lock housing via a pin C, and each end of the pin C is fitted with a limiting sleeve B12. One end of each limiting sleeve B12 abuts against the latch rocker arm 10, and the other end abuts against the inner wall of the lock housing, thereby limiting the latch rocker arm 10 axially on the pin C and preventing the latch rocker arm 10 from shaking. The latch rocker arm 10 can rotate around the axis of the pin C. The other end of the latch rocker arm 10 is provided with a downward trapezoidal limiting boss. The trapezoidal limiting boss can cooperate with the unlocking slot of the traction ring 24 at the tiger tooth structure 25 of the lock housing. When the trapezoidal limiting boss is engaged, the locking mechanism is activated. When the boss is located in the unlocking slot, the traction connector 7 is engaged and locked. When the trapezoidal limiting boss is not located in the unlocking slot, the traction connector 7 is released. The middle part of the locking tongue rocker arm 10 is provided with an upward-opening triangular prism-shaped limiting groove. The triangular prism-shaped limiting groove can cooperate with the triangular prism-shaped limiting boss of the unlocking rocker arm 17. When the triangular prism-shaped limiting boss of the unlocking rocker arm 17 is located in the triangular prism-shaped limiting groove, the locking tongue rocker arm 10 is locked. When the triangular prism-shaped limiting boss of the unlocking rocker arm 17 is not located in the triangular prism-shaped limiting groove, the locking tongue rocker arm 10 is unlocked, thereby allowing the traction connector 7 to be released.

[0076] See appendix Figure 14 One end of the crank 8 is pinned to the lock housing via a pin D, and each end of the pin D is fitted with a limiting sleeve B12. One end of each limiting sleeve B12 abuts against the crank 8, and the other end abuts against the inner wall of the lock housing, thereby limiting the crank 8 in the axial direction of the pin D and preventing the crank 8 from shaking. The crank 8 can rotate around the axis of the pin D.

[0077] See appendix Figure 15 One end of the connecting rod 9 is pinned to the middle of the locking tongue rocker arm 10, and the other end of the connecting rod 9 is pinned to the other end of the crank 8; and a limiting roller 11 is installed on the crank 8 at the connection end with the connecting rod 9, and the limiting roller 11 rolls with the upper surface of the locking tongue rocker arm 10.

[0078] The locking mechanism of the latch mechanism is as follows: when the crank 8 and connecting rod 9 are near the dead point, the latch mechanism closes (that is, the trapezoidal limiting boss of the latch rocker arm 10 is located in the unlocking slot of the traction ring 24, and the traction joint 7 is engaged and locked). The locking rocker arm 10 is precisely limited by the triangular prism limiting groove of the latch rocker arm 10 and the triangular prism limiting boss of the locking safety mechanism. At this time, the opening force of the latch rocker arm 10 is transmitted to the crank 8 shaft in the four-bar linkage through the connecting rod 9, and finally to the lock housing. The yaw pull side of the latch mechanism is transmitted to the lock housing through the pin C of the latch rocker arm 10 itself. Another small part of the force of the latch mechanism is transmitted to the lock housing through the locking safety mechanism.

[0079] The working principle of the locking tongue mechanism is as follows: when the pull cable connector 15 drives the unlocking rocker arm 17 to rotate upward around the axis of the pin A, the triangular prism-shaped limiting boss of the unlocking rocker arm 17 disengages from the triangular prism-shaped limiting groove of the locking tongue rocker arm 10, the locking tongue rocker arm 10 is unlocked, the trapezoidal limiting boss of the locking tongue rocker arm 10 can disengage from the unlocking slot of the traction ring 24, and the traction connector 7 is released.

[0080] The assembly process of the traction lock device is as follows: First, the mounting base A5 is installed in the middle of the long side frame of the tray 1 using high-strength bolts; then, the lock body assembly 6 is installed on the mounting base A5. The lock body assembly 6 and the mounting base A5 are connected by a T-slot and a T-shaped boss, which can achieve quick installation and removal; then, the locking rocker arm 16 on the lock body assembly 6 is moved, and the locking tongue rocker arm 10 is moved by the unlocking rocker arm 17, and the traction connector 7 is pushed in. The tiger tooth groove of the traction connector 7 and the tiger tooth structure 25 of the lock shell are engaged. At the same time, the unlocking slot of the traction connector 7 is engaged with the trapezoidal limiting boss of the locking tongue rocker arm 10 to achieve the biting and locking of the traction connector 7.

[0081] See Appendix Figure 22 The unlocking trigger device 3 includes: a mounting base B, a pull wire mounting base 26, a triggering mechanism 27, a base 28, an actuator 29, an adjusting screw 30, and a locking nut 31;

[0082] The mounting base B has the same structure as the mounting base A5. The mounting base B is used to install the unlocking trigger device 3 on the tray 1. It is installed in the middle of the long side frame of the tray 1 by high-strength bolts. The mounting base B has a Z-shaped cross section and a T-shaped groove in the middle.

[0083] See appendix Figure 23 The outer surface of the base 28 is machined with a T-shaped structure. The base 28 is installed on the mounting base B through the cooperation of the T-shaped structure and the T-slot, so as to realize quick loading and unloading between the base 28 and the mounting base B.

[0084] A rectangular guide hole 34 is machined in the base 28. The length direction of the rectangular guide hole 34 is set along the length direction of the side of the tray 1 where the unlocking trigger device 3 is located, and the rectangular guide hole 34 penetrates two opposite sides of the base 28, so that the two ends of the rectangular guide hole 34 are end A and end B respectively.

[0085] A locking groove 32 is machined on the end face of the rectangular guide hole 34 on the base 28. The bottom of the locking groove 32 communicates with the rectangular guide hole 34, and the cross-sectional shape of the locking groove 32 is exactly the same as the cross-sectional shape of the rectangular guide hole 34. That is, the locking groove 32 can be obtained by rotating a portion of the rectangular guide hole 34 about its center line by 30° to 60°. In this embodiment, the locking groove 32 is obtained by rotating a portion of the rectangular guide hole 34 about its center line by 45°. A hook 35 is also provided on the end face of the rectangular guide hole 34 on the base 28.

[0086] Inside the base 28, a partition is machined on the side closer to end B than end A of the rectangular guide hole 34. A trigger mechanism mounting hole 33 is machined on the partition. The axial direction of the trigger mechanism mounting hole 33 is perpendicular to the length direction of the rectangular guide hole 34. The trigger mechanism mounting hole 33 communicates with the rectangular guide hole 34.

[0087] See appendix Figure 24 The pull wire mounting base 26 is a cylindrical structure with openings at both ends, and the side wall of the pull wire mounting base 26 is machined with a T-shaped opening; the pull wire mounting base 26 is mounted on the end face of the rectangular guide hole 34 on the base 28, and the inner cavity of the pull wire mounting base 26 communicates with the rectangular guide hole 34; the pull wire mounting base 26 is used to install the pull wire 4;

[0088] See appendix Figure 25 The triggering mechanism 27 includes: a roller 36, a compression spring 37, a connecting frame 38, and a locking block 39; the connecting frame 38 passes through the triggering mechanism mounting hole 33; the locking block 39 is threadedly installed on the end of the connecting frame 38 located above the partition of the base 28; the roller 36 is installed on the end of the connecting frame 38 located below the partition of the base 28 via a roller bracket; the compression spring 37 is installed outside the connecting frame 38 and located between the roller bracket and the partition of the base 28; when the pallet 1 is located inside the cabin, the roller 36 abuts against the cabin floor, causing the compression spring 37 to be in a compressed state, with one end of the compression spring 37 abutting against the roller bracket and the other end abutting against the lower surface of the partition of the base 28; when the pallet 1 leaves the cabin, the roller 36 is unrestrained, and the connecting frame 38 and the roller 36 and locking block 39 connected to it move downward as a whole under the restoring force of the compression spring 37;

[0089] See appendix Figure 26 The actuator 29 includes: a slider 41, a tension spring 42, a pull block 43, a pull rope 44, and a pull ring 45 connected in sequence; the cross-sections of the slider 41 and the pull block 43 are both non-circular, that is, the cross-sections are inconsistent when rotated by a certain angle; in this embodiment, the slider 41 and the pull block 43 are both rectangular block structures, as shown in the attached figure. Figure 27As shown, a T-shaped cable head mounting groove 412 is machined on one side of the slider 41, and the cable head mounting groove 412 passes through the end of the slider 41; a stop groove 411 with the opening facing downward is machined on the other side of the slider 41.

[0090] The actuator 29 is installed in the rectangular guide hole 34 of the base 28 and slides in cooperation with the rectangular guide hole 34. When the tray 1 is located in the cabin, one end of the slider 41 passes through end B of the rectangular guide hole 34 and is located in the pull wire mounting seat 26. The pull wire head mounting groove 412 of the slider 41 is opposite to the T-shaped opening on the pull wire mounting seat 26. The stop groove 411 on the slider 41 cooperates with the locking block 39 of the trigger mechanism 27, and the locking block 39 locks the position of the slider 41. The pull block 43 is pulled out of end A of the rectangular guide hole 34 by the pull rope 44, and after the pull block 43 is rotated, it is locked in the locking groove 32, and the locking groove 32 locks the position of the pull block 43. At this time, the tension spring 42 is in a stretched state. The pull rope 44 is installed on the hook 35 through the pull ring 45.

[0091] The pull cable 4 is a brake cable, consisting of a steel wire and an outer sheath covering the steel wire; the end of the steel wire at the head of the pull cable 4 is provided with a cylindrical connector (and the axis of the cylinder is perpendicular to the axis of the steel wire); the pull cable 4 is arranged along the side of the tray 1, and the tail of the pull cable 4 is connected to the pull cable connector 15 of the traction lock device 2. After the connector at the head of the pull cable 4 passes through the T-shaped opening on the pull cable mounting base 26, it is installed in the pull cable head mounting groove 412 of the slider 41;

[0092] The adjusting screw 30 has a through hole, the diameter of which is larger than the diameter of the steel wire but smaller than the outer diameter of the sheath. Both the adjusting screw 30 and the locking nut 31 have openings on their sides for the steel wire to pass through. The adjusting screw 30 is threaded to the cable mounting base 26, serving to adjust the tension of the cable 4. The locking nut 31 is threaded to the adjusting screw 30, serving to fix the position of the adjusting screw 30. The side openings of the adjusting screw 30 and the locking nut 31 are opposite each other. The steel wire at the head of the cable 4 is inserted into the through hole of the adjusting screw 30 through the side openings of the adjusting screw 30 and the locking nut 31. When the steel wire is taut, the locking nut 31 abuts against the end face of the cable mounting base 26, and the sheath at the head of the cable 4 abuts against the head end face of the adjusting screw 30. When the steel wire is further tightened under the action of the actuator 29, the adjusting screw 30 and the locking nut 31 can achieve relative movement between the steel wire and the sheath.

[0093] Furthermore, both the stop groove 411 and the locking block 39 are wedge-shaped structures. In this embodiment, the locking block 39 has a frustum structure.

[0094] The assembly process of the unlocking trigger device 3 is as follows: When the pull cable 4 needs to be installed, push the slider 41 in the actuator 29 into the pull cable mounting seat 26, and then place the connector of the head of the pull cable 4 into the pull cable head mounting groove 412; pull the pull block 43 by the pull ring 45 until the locking block 39 is aligned with the stop groove 411 and the two cooperate; then install the unlocking trigger device 3 on the edge of the tray 1; adjust the tightness by adjusting the screw 30, and turn the locking nut 31 to lock the position of the adjusting screw 30; pull the pull ring 45 to move the pull block 43 to the position of the locking groove 32, and turn the pull block 43 to make it in the locking groove 32; wind the pull rope 44 around the hook 35, and hang the pull ring 45 on the hook 35. The unlocking trigger device 3 is now installed.

[0095] Working principle:

[0096] The cabin is opened, the towing parachute is released, and tray 1 is towed out of the cabin. The towing lock device 2 remains locked until tray 1 is completely out of the cabin.

[0097] The moment tray 1 leaves the cabin, the roller 36 of the unlocking trigger device 3 installed on the forward long side of tray 1 loses its restraint. The connecting frame 38, the roller 36 connected to it, and the locking block 39 move downward as a whole under the restoring force of the compression spring 37, thereby causing the locking block 39 to separate from the slider 41. The slider 41 loses its restraint and moves to the right under the restoring force of the tension spring 2, which in turn pulls the pull cable 4 to the right. After the pull cable 4 is further tightened, it first pulls the pull cable rocker arm 18 upward through the pull cable connector 15. At this time, the protruding structure on the pull cable rocker arm 18 actuates the lock. The fixed rocker arm 16 swings to unlock, and the pull line 4 continues to pull the pull line rocker arm 18. The pull line rocker arm 18 drives the unlocking rocker arm 17 to start swinging upward. At this time, the locking safety mechanism is opened, which in turn unlocks the locking tongue mechanism and releases the traction connector 7. At this time, the traction parachute connected to the traction ring 24 of the traction connector 7 is disconnected from the tray 1. At the same time, the guide ring 21 of the traction connector 7 drags the pull rope of the main parachute and the guide parachute, pulling the main parachute and the guide parachute upward. The main parachute and the guide parachute then open the main parachute connected to the tray 1 normally. After the main parachute opens normally, the tray 1 is ensured to descend slowly with a normal attitude.

[0098] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A towing lock device based on an integrated air transport and airdrop pallet, wherein the towing lock device is installed on the pallet, and an unlocking trigger device is also installed on the pallet, the unlocking trigger device being connected to the towing lock device via a pull cable; Its features are, The traction lock device includes: a lock body assembly and a traction connector; The top of the towing connector is connected to the main parachute and the pilot parachute of the main parachute, and the bottom is connected to the towing parachute. One side of the towing connector is machined with an unlocking slot that opens upward and a tiger tooth groove that opens downward. The lock body assembly includes: a bolt mechanism, a locking and safety mechanism, and a lock shell. The lock shell adopts a two-part structure, with the two parts being lock shell one and lock shell two. One side of the lock housing is mounted on the tray via mounting base A, and the other opposite side is provided with a tiger tooth structure. The side end of the traction connector is mounted on the tiger tooth structure of the lock housing, and the tiger tooth groove of the traction connector engages with the tiger tooth structure, allowing the traction connector to slide out smoothly from the lock housing. Both the locking mechanism and the latch mechanism are installed inside the lock housing. The latch mechanism is located below the locking mechanism. The locking mechanism adopts a swing-type structure and includes: a pull cable connector, a locking rocker arm, an unlocking rocker arm, and a pull cable rocker arm. One end of the unlocking rocker arm is pinned to the lock housing via a pin A. The unlocking rocker arm can rotate around the axis of pin A. The other end of the unlocking rocker arm is provided with a downward-facing triangular prism-shaped limiting boss. A guide rod is fixedly connected to the middle of the unlocking rocker arm. The guide rod slides in fit with an arc-shaped guide groove A machined on the lock housing. The arc of the arc-shaped guide groove A is centered on the axis of pin A. One end of the locking rocker arm is bolted to the lock housing, allowing the locking rocker arm to rotate around the bolt's axis. A guide cylinder is provided on one end face of the other end of the locking rocker arm, which slides into an arc-shaped guide groove B machined on the lock housing. The arc of the guide groove B is centered on the bolt's axis. An open slot is machined on the other end face of the locking rocker arm, which engages with the guide rod of the unlocking rocker arm. When the guide rod of the unlocking rocker arm is within the open slot, the unlocking rocker arm is locked; when the guide rod is not within the open slot, the unlocking rocker arm is unlocked. The pull-wire rocker arm has a double-layer side plate structure, each side plate being a V-shaped structure with an obtuse angle. One side plate of the pull-wire rocker arm is located between the unlocking rocker arm and the locking rocker arm, while the other side plate is located between the unlocking and locking rocker arms. The locking rocker arm is connected to the lock housing; one end of the pull-cord rocker arm is pinned to the end of the unlocking rocker arm via pin B, and the pull-cord rocker arm can rotate around the axis of pin B; the other end of the pull-cord rocker arm is pinned to the pull-cord connector, and when the locking safety mechanism is not working, the pull-cord connector is supported in the mounting groove provided on the upper surface of the unlocking rocker arm, and the pull-cord connector is connected to the pull-cord; a limiting cylinder is provided in the middle of the pull-cord rocker arm, and the limiting cylinder abuts against the limiting protrusion provided on the side of the middle of the locking rocker arm; the locking tongue mechanism adopts a four-bar linkage mechanism, the locking safety mechanism is connected to the pull-cord, and the locking tongue mechanism cooperates with the unlocking slot of the traction connector to achieve engagement with the traction connector; when the pull-cord pulls the locking safety mechanism, the locking tongue mechanism can be separated from the traction connector, the traction connector, the traction parachute, the main parachute, and the guide parachute can be dislodged, and the main parachute can be pulled to open.

2. The towing lock device based on an integrated air transport and airdrop pallet as described in claim 1, characterized in that, The traction joint includes: a guide ring, a safety buckle, and a traction ring; The traction ring has an L-shaped structure; a locking hook is machined at the top of the vertical part of the L-shaped structure, the bottom of the guide ring is installed in the locking hook, and a round hole is machined at the top of the guide ring for connecting with the main parachute and the guide parachute of the main parachute; the opening of the locking hook is closed by a rotatable safety buckle; the safety buckle is installed on the traction ring by a pin E, and the safety buckle can rotate around the axis of the pin E. The bottom of the vertical part of the L-shaped structure is machined with a round mounting hole for connecting to a towing parachute; The upper surface of the horizontal portion of the L-shaped structure is machined with an upward-opening unlocking slot, which cooperates with the lock body assembly to enable quick locking and unlocking of the lock body assembly; the lower surface of the horizontal portion of the L-shaped structure is machined with a downward-opening tiger tooth groove.

3. The towing lock device based on an integrated air transport and airdrop pallet as described in claim 1, characterized in that, Torsion springs are provided at pin A of the unlocking rocker arm, bolt of the locking rocker arm, pin B of the pull-wire rocker arm, and pin joint between the pull-wire rocker arm and the pull-wire connector for resetting the movement of each rocker arm.

4. A towing lock device based on an integrated air transport and airdrop pallet as described in claim 1, characterized in that, The locking tongue mechanism includes: a crank, a connecting rod, a locking tongue rocker arm, and a limiting roller; One end of the latch rocker arm is pinned to the lock housing via a pin C; the latch rocker arm can rotate around the axis of the pin C; the other end of the latch rocker arm is provided with a downward trapezoidal limiting boss, which can cooperate with the unlocking slot of the traction ring at the tiger tooth structure of the lock housing. When the trapezoidal limiting boss is located in the unlocking slot, the traction connector is engaged and locked; when the trapezoidal limiting boss is not located in the unlocking slot, the traction connector is released; the middle part of the latch rocker arm is provided with an upward-opening triangular prism-shaped limiting groove, which can cooperate with the triangular prism-shaped limiting boss of the unlocking rocker arm. When the triangular prism-shaped limiting boss of the unlocking rocker arm is located in the triangular prism-shaped limiting groove, the latch rocker arm is locked; when the triangular prism-shaped limiting boss of the unlocking rocker arm is not located in the triangular prism-shaped limiting groove, the latch rocker arm is unlocked, thereby allowing the traction connector to be released. One end of the crank is pinned to the lock housing via a pin D; the crank can rotate around the axis of the pin D. One end of the connecting rod is pinned to the middle of the locking tongue rocker arm, and the other end of the connecting rod is pinned to the other end of the crank; and a limiting roller is installed on the crank at the connection end with the connecting rod, and the limiting roller is in rolling engagement with the upper surface of the locking tongue rocker arm.

5. A towing lock device based on an integrated air transport and airdrop pallet as described in any one of claims 1-4, characterized in that, The mounting base A has a Z-shaped cross-section and a T-shaped groove in the middle. The lock body assembly is mounted on the mounting base A, and one side of the lock body assembly mates with the T-shaped groove on the mounting base A, so as to realize quick installation and removal between the lock body assembly and the mounting base A.

6. A towing lock device based on an integrated air transport and airdrop pallet as described in claim 5, characterized in that, Lock housing 1 and lock housing 2 are connected and fixed together by locating pins and anti-shear screws to form a lock housing; a T-shaped boss is provided on one outer side of the lock housing, which mates with the T-shaped groove of the mounting base A.

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