Unlock trigger device

Abstract

The present invention belongs to the field of aerospace technology and discloses an unlocking trigger device. The unlocking trigger device is used to unlock a split nut device, and the split nut device includes a movable locking rod. The unlocking trigger device includes a base, a link assembly, a limiting rope, and a rope-breaking assembly. The link assembly includes a first rod, a second rod, and a trigger member. The first end of the first rod is rotatably connected to the base, the second end of the first rod is rotatably connected to the first end of the second rod, the second end of the second rod is rotatably connected to the first end of the trigger member, and the second end of the trigger member is rotatably connected to the base. The limiting rope can apply a pulling force to the first rod along a preset direction so that the third end of the trigger member can press against the locking rod to lock the split nut device. The rope-breaking assembly is arranged on the base and is configured to melt or cut the limiting rope so that the trigger member rotates and releases the locking of the locking rod, and the split nut device is unlocked, which can improve the pressing force, improve the locking and releasing ability, and achieve efficient and reliable unlocking operation.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and particularly to an unlocking trigger device for a clamping and releasing device. Background Art

[0002] At present, with the continuous development of the aerospace and related precision fields, the thermal knife unlocking trigger device of non-explosive devices is more and more widely used. The thermal knife type clamping and releasing device mostly adopts the thermal fuse rope loop method, and the commonly used materials include Dyneema rope and Kevlar rope. Due to the creep characteristics of the Dyneema rope itself, it is only suitable for small mass loads, such as tape antennas, micro satellite solar arrays, etc. Although the Kevlar rope has better mechanical properties, its melting point is relatively high, the preparation process of the corresponding heating component is complex, and the high temperature is easy to damage the circuit, resulting in limited use times of the thermal knife device.

[0003] The existing thermal fuse Dyneema rope type clamping and releasing device only relies on the elastic potential energy of the spring to overcome the friction work, or only relies on the rope pre-tightening force to provide the load clamping force. Due to its own limitations, it cannot provide a greater clamping force to adapt to large-size and large-mass loads. In addition, as a clamping and releasing device, the split nut device's simple limiting force on the split nut device often exceeds the tensile force that the currently commonly used wire diameter rope can withstand. Affected by creep, there is a risk of mis-unlocking of the split nut device during long-term storage (on the ground, in orbit). If the wire diameter of the rope is increased, although the tensile resistance is enhanced, it will lead to an extended unlocking time and increased power consumption.

[0004] Therefore, there is an urgent need for a new unlocking trigger device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an unlocking trigger device, which can improve the clamping force, improve the locking and releasing ability in the face of large-area and large-mass loads, and realize more efficient and reliable unlocking operations.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An unlocking trigger device for unlocking a split nut device, the split nut device includes a movable locking rod, and the unlocking trigger device includes:

[0008] A base;

[0009] A link assembly, including a first rod, a second rod and a trigger member. The first end of the first rod is rotatably connected to the base, the second end of the first rod is rotatably connected to the first end of the second rod, the second end of the second rod is rotatably connected to the first end of the trigger member, the second end of the trigger member is rotatably connected to the base, and a third end is convexly provided on the trigger member;

[0010] The limiting component includes a limiting rope which can apply a pulling force to the first rod along a preset direction, so that the third end of the triggering member can press against the locking rod to lock the split nut device.

[0011] The rope-breaking component is arranged on the base and is configured to fuse or cut off the limiting rope, so that the triggering member rotates and releases the locking of the locking rod, and the split nut device is unlocked.

[0012] As an optional solution, an abutting surface is provided on the third end of the triggering member, and the abutting surface can abut against the locking rod, and the abutting surface forms a first preset angle with the moving direction of the locking rod.

[0013] As an optional solution, the abutting point between the locking rod and the abutting surface is the abutting contact point. The distance from the second end of the triggering member to the abutting contact point is the first radius, and the distance from the second end of the triggering member to the first end of the triggering member is the second radius, and the first radius is less than the second radius.

[0014] As an optional solution, the limiting component includes a first ear and a second ear. The first ear and the second ear are respectively arranged on both sides of the rope-breaking component. The distance from the first ear to the second end of the first rod is L1, and the distance from the second ear to the second end of the first rod is L2, and L1 > L2. One end of the limiting rope is connected to the first ear, the other end of the limiting rope is connected to the first rod, and at least part of the limiting rope abuts against the rope-breaking component; or;

[0015] One end of the limiting rope is connected to the second ear, the limiting rope is wound around the first ear, and the other end of the limiting rope is connected to the first rod, and at least part of the limiting rope abuts against the rope-breaking component.

[0016] As an optional solution, a first rope-passing hole is provided between the first ear and the base, and a second rope-passing hole is provided between the second ear and the base. The heights at which the first rope-passing hole and the second rope-passing hole are provided are both lower than the rope-breaking component, and the limiting rope can pass through the first rope-passing hole and the second rope-passing hole so that the limiting rope is close to the rope-breaking component.

[0017] As an optional solution, both the first ear and the second ear are constructed in an I-shape.

[0018] As an optional solution, protective coatings are provided on both the first ear and the second ear.

[0019] As an optional solution, the rope-breaking component includes a heating resistor which is arranged on the base and can fuse the limiting rope.

[0020] As an alternative solution, the unlocking trigger device includes two of the link assemblies. The two link assemblies are arranged on the base, and each of the two link assemblies is connected to one of the split nut devices. The first rods of the two link assemblies are both connected to the limit assembly, and the rope-breaking assembly can unlock the two split nut devices synchronously.

[0021] As an alternative solution, the link assembly further includes a third rod. One end of the third rod is rotatably connected to the trigger member, and the other end is rotatably connected to the locking rod of the split nut device.

[0022] Beneficial effects:

[0023] For the unlocking trigger device provided by the present invention, when the unlocking trigger device works, the limit rope exerts a pulling force on the first rod, causing the third end of the trigger member to press against the locking rod of the split nut device, thereby realizing the locking of the split nut device. When unlocking is required, the rope-breaking assembly on the base melts or cuts off the limit rope. The first rod that loses the pulling force drives the trigger member to rotate, and the trigger member no longer presses against the locking rod, and the split nut device is immediately unlocked. Through the ingenious cooperation of the link assembly and the limit assembly, the rope-breaking assembly is used to control the melting or cutting off of the limit rope, and then the unlocking of the split nut device is controlled. The unlocking trigger device can improve the pressing force, improve the locking and releasing ability in the face of large-area and large-mass loads, realize more efficient and reliable unlocking operations, and at the same time reduce the cost of the unlocking trigger device. Description of the drawings

[0024] Figure 1 is a schematic diagram of the locked state of the unlocking trigger device provided by an embodiment of the present invention;

[0025] Figure 2 is a first schematic diagram of the unlocked state of the unlocking trigger device provided by an embodiment of the present invention;

[0026] Figure 3 is a second schematic diagram of the unlocked state of the unlocking trigger device provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of the unlocking trigger device provided by an embodiment of the present invention;

[0028] Figure 5 is Figure 4 an enlarged view of part A in

[0029] Figure 6 is Figure 4 an enlarged view of part B in

[0030] In the figure:

[0031] 1. Base;

[0032] 2. Linkage assembly; 21. First rod; 211. Rope winding groove; 22. Second rod; 23. Trigger; 231. Contact surface; 24. Third rod;

[0033] 3. Limit assembly; 31. First ear; 32. Second ear; 33. First rope passing hole; 34. Second rope passing hole;

[0034] 4. Rope breakage assembly; 41. Heating resistor;

[0035] 100. Split nut device; 101. Locking rod; 102. Main body part; 103. Long oval hole. Detailed implementation manner

[0036] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings rather than all structures.

[0037] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but are in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0040] As Figures 1 - 3 shown, the split nut device 100 includes a locking rod 101, a main body portion 102, and an elastic reset member (not shown in the figure). At least a part of the locking rod 101 is movably disposed within the main body portion 102. A long circular hole 103 is formed in the main body portion 102. The locking rod 101 passes through the long circular hole 103 and can move along the length direction of the long circular hole 103. The elastic reset member is disposed within the main body portion 102 and is connected to or abuts against the locking rod 101. When the split nut device 100 is in a locked state, the locking rod 101 is abutted and the elastic reset member is in a compressed state; when the split nut device 100 is unlocked, the elastic reset member extends and can push the locking rod 101 to move relative to the main body portion 102, and the unlocking action of the split nut device 100 is completed.

[0041] Specifically, components with a large area and large mass load can be threadedly connected to the main body portion 102. The movement of the locking rod 101 directly affects the connection and separation between the component and the main body portion 102. When the locking rod 101 is abutted, the locking rod 101 can limit the threaded connection relationship between the component and the main body portion 102, and the component and the main body portion 102 are tightly connected; when the locking rod 101 is not abutted, the elastic potential energy of the elastic reset member pushes the locking rod 101 to move, and the threaded connection between the component and the main body portion 102 loses its restraint. The component is affected by its own gravity or other external tensile forces, and the component and the main body portion 102 are separated. Finally, the unlocking and separating action of the component and the main body portion 102 is completed. The split nut device 100 belongs to the existing mature technology and will not be elaborated here.

[0042] This embodiment provides an unlocking trigger device. As Figures 1 - 3 shown, the unlocking trigger device is used to unlock the split nut device 100. The unlocking trigger device includes a base 1, a link assembly 2, a limiting assembly 3, and a rope-breaking assembly 4. The link assembly 2 includes a first rod 21, a second rod 22, and a trigger member 23. The first end of the first rod 21 is rotatably connected to the base 1. The second end of the first rod 21 is rotatably connected to the first end of the second rod 22. The second end of the second rod 22 is rotatably connected to the first end of the trigger member 23. The second end of the trigger member 23 is rotatably connected to the base 1. A third end protrudes from the trigger member 23 and protrudes between the first end and the second end. The limiting assembly 3 includes a limiting rope that can apply a pulling force to the first rod 21 along a preset direction so that the third end of the trigger member 23 can press against the locking rod 101 to lock the split nut device 100. The rope-breaking assembly 4 is disposed on the base 1 and is configured to fuse or cut the limiting rope so that the trigger member 23 rotates and releases the locking of the locking rod 101, and the split nut device 100 is unlocked.

[0043] When the unlocking trigger device of this embodiment is working, the limit rope applies tension to the first rod 21, so that the third end of the trigger member 23 presses against the locking rod 101 of the split nut device 100, thereby locking the split nut device 100. When unlocking is required, the rope-breaking assembly 4 on the base 1 melts or cuts the limit rope, and the first rod 21 without tension drives the trigger member 23 to rotate, and the trigger member 23 no longer presses against the locking rod 101, and the split nut device 100 is unlocked immediately. Through the clever cooperation of the connecting rod assembly 2 and the limit assembly 3, the rope-breaking assembly 4 is used to control the melting or cutting of the limit rope, and then control the unlocking of the split nut device 100. This structure can increase the pressing force, improve the locking and releasing ability when facing a large mass load, and achieve a more efficient and reliable unlocking operation.

[0044] Specifically, in this embodiment, when the split nut device 100 is in a locked state, the third end of the trigger member 23 presses against the locking rod 101 of the split nut device 100, and the limiting rope applies a pulling force to the first rod 21. The first rod 21 and the second rod 22 are arranged at an angle that is close to 180 degrees and less than 180 degrees, thereby achieving the effect of reducing the tension acting on the limiting rope.

[0045] like Figures 1 - 3 As shown, a contact surface 231 is provided on the third end of the trigger member 23, and the contact surface 231 can contact the locking rod 101, and the movement direction of the contact surface 231 and the locking rod 101 is at a first preset angle. When locked, the contact surface 231 contacts the locking rod 101. Since the movement direction of the contact surface 231 and the locking rod 101 is at a first preset angle, the contact surface 231 can decompose the force from the trigger member 23 into a component force perpendicular to the movement direction of the locking rod 101, thereby enhancing the lateral constraint on the locking rod 101, effectively preventing the locking rod 101 from accidentally sliding, and greatly improving the stability and reliability of the locking. When unlocking, the angle design enables the contact surface 231 and the locking rod 101 to quickly break away from each other, ensuring that the unlocking process of the split nut device 100 is smooth and efficient.

[0046] In this embodiment, the first preset angle is 90 degrees. In some embodiments, the first preset angle is 30 degrees, 45 degrees, 60 degrees, 75 degrees, 105 degrees, etc., which is not specifically limited here.

[0047] like Figures 2 - 3As shown, the trigger member 23 is triangular in shape. The surface of the third end of the trigger member 23 that faces away from the abutting surface 231 is a guiding surface. The guiding surface forms a second preset angle with the moving direction of the locking rod 101. When the trigger member 23 rotates and releases the locking of the locking rod 101, and the split nut device 100 is unlocked, the locking rod 101 abuts against the guiding surface. During the locking stage, the triangular structure ensures that the trigger member 23 stably presses against the locking rod 101. When the trigger member 23 rotates to unlock, the guiding surface guides the smooth movement of the locking rod 101, so that the locking rod 101 abuts against the guiding surface, avoiding jamming or collision with surrounding components, and ensuring a smooth and efficient unlocking process of the split nut device 100.

[0048] In this embodiment, the second preset angle is 60 degrees. In some embodiments, the second preset angle is 45 degrees, 50 degrees, 55 degrees, 65 degrees, 70 degrees, etc., and no specific limitation is made here.

[0049] As Figures 1 - 3 shown, the abutting point between the locking rod 101 and the abutting surface 231 is the abutting contact point. The distance from the second end of the trigger member 23 to the abutting contact point is the first radius, and the distance from the second end of the trigger member 23 to the first end of the trigger member 23 is the second radius. The first radius is smaller than the second radius. Due to the first radius being smaller than the second radius, when the limiting rope pulls the first rod 21 and the trigger member 23 rotates around the second end, based on the lever principle, the smaller first radius means that at the abutting contact point, the trigger member 23 can generate a greater acting force to press against the locking rod 101, ensuring the firmness of the locking. When unlocking is required, the smaller first radius also enables the trigger member 23 to rotate a smaller angle, and the abutting contact point can quickly separate from the locking rod 101, making the unlocking action rapid and sensitive. This design of the radius difference not only strengthens the locking effect but also improves the unlocking efficiency, ensuring the reliable operation of the split nut device 100.

[0050] As Figures 1 - 3As shown, in some embodiments, the limiting assembly 3 includes a first ear 31 and a second ear 32. The first ear 31 and the second ear 32 are respectively arranged on both sides of the rope-breaking assembly 4. The distance from the first ear 31 to the second end of the first rod 21 is L1, and the distance from the second ear 32 to the second end of the first rod 21 is L2, where L1 > L2. One end of the limiting rope is connected to the first ear 31, the other end of the limiting rope is connected to the first rod 21, and at least part of the limiting rope abuts against the rope-breaking assembly 4. The first ear 31 and the second ear 32 are on both sides of the rope-breaking assembly 4, and L1 > L2. This layout enables the limiting rope to form a specific tension distribution. On the one hand, in the normal state, the limiting rope can stably transmit the tension from the first ear 31 to the first rod 21, keeping the trigger 23 pressing against the locking rod 101 and maintaining the locking state of the split nut device 100. On the other hand, when the rope-breaking assembly 4 operates to cut the limiting rope, this connection method can ensure that the first rod 21 quickly senses the disappearance of the tension, promptly drives the trigger 23 to rotate, releases the locking of the locking rod 101, and realizes the rapid unlocking of the split nut device 100.

[0051] In other embodiments, one end of the limiting rope is connected to the second ear 32, the limiting rope is wound around the first ear 31, and the other end of the limiting rope is connected to the first rod 21, and at least part of the limiting rope abuts against the rope-breaking assembly 4. The limiting rope passes through the rope-breaking assembly 4 twice and is respectively connected to the first ear 31 and the second ear 32, and finally connected to the first rod 21. That is, there are two sections of the limiting rope abutting against the rope-breaking assembly 4, forming a more stable and sensitive limiting structure. During normal operation, it can ensure a stable tension is applied to the first rod 21, maintain the effective pressing of the trigger 23 against the locking rod 101, and ensure the reliable locking of the split nut device 100. Once the rope-breaking assembly 4 operates, the tensions at both ends of the limiting rope disappear simultaneously. With this double-connection design, the first rod 21 can respond quickly and accurately, drive the trigger 23 to quickly release the locking of the locking rod 101, greatly improving the stability and efficiency of the unlocking process of the split nut device 100.

[0052] In this embodiment, a rope winding groove 211 is provided at the second end of the first rod 21, and the limiting rope can be wound in the rope winding groove 211. The rope winding groove 211 can effectively guide the winding of the limiting rope, making the position of the limiting rope on the first rod 21 fixed and stable, avoiding situations such as sliding and deviation of the limiting rope during operation, ensuring that the direction of the tension applied by the limiting rope to the first rod 21 always remains the same, and thus enabling the trigger 23 to stably press or release the pressure on the locking rod 101. At the same time, the rope winding groove 211 increases the contact area and friction between the limiting rope and the first rod 21. When the rope-breaking assembly 4 operates, it can make the first rod 21 respond more quickly and accurately to the change in the tension of the limiting rope, improving the reliability and sensitivity of the unlocking process of the split nut device 100.

[0053] AsFigures 1 - 3 As shown, a first rope-passing hole 33 is provided between the first ear 31 and the base 1, and a second rope-passing hole 34 is provided between the second ear 32 and the base 1. The heights at which the first rope-passing hole 33 and the second rope-passing hole 34 are provided are both lower than the rope-breaking assembly 4. The limiting rope can pass through the first rope-passing hole 33 and the second rope-passing hole 34, so that the limiting rope is closely attached to the rope-breaking assembly 4. When the rope-breaking assembly 4 operates, due to the limiting rope being closely attached to the rope-breaking assembly 4, the limiting rope can be quickly cut off, and the first rope-passing hole 33 and the second rope-passing hole 34 can guide the limiting rope to quickly break away, enabling the first rod 21 to promptly respond to the disappearance of the pulling force, driving the triggering member 23 to accurately unlock, and improving the stability and timeliness of the unlocking of the unlocking trigger device.

[0054] As Figures 1 - 3 shown, both the first ear 31 and the second ear 32 are constructed in an I-shape. On the one hand, the two wings of the I-shape provide a more stable winding surface for the connection of the limiting rope, ensuring a firm connection of the limiting rope and preventing loosening or falling off during the working process. On the other hand, the slender middle part of the I-shape can make multiple sections or multiple limiting ropes converge towards the center of the rope-breaking assembly 4, enabling the rope-breaking assembly 4 to more quickly cut or fuse the limiting rope, and further enabling the triggering member 23 to accurately and stably lock and unlock the locking rod 101. In addition, the I-shaped structure enables the ear to effectively reduce its own weight while ensuring sufficient strength, optimizing the material usage efficiency of the overall unlocking trigger device.

[0055] In this embodiment, protective coatings are provided on both the first ear 31 and the second ear 32. This coating can effectively isolate water vapor, corrosive substances, etc. in the external environment, prevent the first ear 31 and the second ear 32 from being damaged due to moisture absorption and rusting or chemical erosion, and greatly extend their service life. During the frequent pulling of the limiting rope, the protective coating can reduce the friction coefficient on the surfaces of the first ear 31 and the second ear 32, reduce the wear between the limiting rope and the first ear 31 and the second ear 32, ensure that the limiting rope always maintains a good working state, stably transmit the pulling force to the first rod 21, provide a solid support for the accurate locking and unlocking of the locking rod 101 by the triggering member 23, and improve the unlocking stability of the split nut device 100.

[0056] As Figures 1 - 3As shown, the rope-breaking assembly 4 includes a heating resistor 41. The heating resistor 41 is disposed on the base 1 and can melt the limit rope. The heating resistor 41 is arranged on the base 1. When it is necessary to unlock the split nut device 100, only by energizing the heating resistor 41 can heat be quickly generated. This heat can accurately and efficiently melt the limit rope without complex mechanical operations. Compared with other cutting methods, heating and melting is quieter and impact-free, and will not cause additional vibration or damage to surrounding components. Moreover, the control of the heating resistor 41 is simple, and the on-off control can be easily achieved through the circuit. The melting timing can be accurately grasped to ensure that the limit rope is cut at the appropriate moment, enabling the first rod 21 to drive the trigger member 23 to quickly release the locking of the locking rod 101, improving the accuracy and reliability of the entire unlocking trigger device.

[0057] In some embodiments, the rope-breaking assembly 4 may further include a cutter. The cutter is disposed on the base 1 and can cut the limit rope. When the split nut device 100 needs to be unlocked, the cutter can quickly cut the limit rope. The cutting action of the cutter is clean and crisp, with a fast response speed, and can instantly release the tension of the limit rope on the first rod 21. Compared with the melting method, the cutter is not affected by factors such as ambient temperature and humidity, has high stability, and can work reliably under various complex working conditions. The precise cutting operation of the cutter can ensure that the trigger member 23 rotates in time to release the locking of the locking rod 101, enabling the split nut device 100 to be quickly unlocked, providing a strong guarantee for the efficient unlocking of the unlocking trigger device.

[0058] As Figures 4 - 6 As shown, the unlocking trigger device includes two link assemblies 2. The two link assemblies 2 are disposed on the base 1. The two link assemblies 2 are respectively connected to a split nut device 100. The two first rods 21 of the two link assemblies 2 are both connected to the limit assembly 3. The rope-breaking assembly 4 can synchronously unlock the two split nut devices 100. The two link assemblies 2 are respectively connected to a split nut device 100, and the two first rods 21 are both connected to the limit assembly 3. When the rope-breaking assembly 4 melts the limit rope, synchronous unlocking of the two split nut devices 100 can be achieved, reducing the complex operation of separately controlling the unlocking of multiple split nut devices 100, simplifying the control process, reducing the failure rate, and ensuring smooth unlocking actions and improving work efficiency and unlocking reliability in some scenarios that require collaborative operations.

[0059] As Figures 4 - 6As shown, the connecting rod assembly 2 further includes a third rod 24. One end of the third rod 24 is rotatably connected to the trigger member 23, and the other end is rotatably connected to the locking rod 101 of the split nut device 100. One end of the third rod 24 is rotatably connected to the trigger member 23, and the other end is rotatably connected to the locking rod 101 of the split nut device 100, effectively enhancing the mechanical conduction stability between the trigger member 23 and the locking rod 101. In the locked state, the pressing force of the trigger member 23 can be transmitted to the locking rod 101 more accurately and smoothly, ensuring the firm locking of the split nut device 100; when unlocking, the third rod 24 can quickly respond to the rotation of the trigger member 23, and the elastic potential energy stored in the elastic reset member actively drives the locking rod 101 to act quickly to achieve the rapid unlocking of the split nut device 100 and improve the unlocking efficiency. At the same time, the rotational connection mode of the third rod 24 can also flexibly adapt to different working angles and position changes, improving the adaptability of the unlocking trigger device to complex working conditions and enhancing the flexibility of the layout of the split nut device 100.

[0060] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An unlocking trigger device, used for unlocking a split nut device (100), wherein the split nut device (100) comprises a movable locking rod (101), characterized in that: The unlocking trigger device comprises: Base (1); A connecting rod assembly (2), comprising a first rod (21), a second rod (22) and a trigger member (23), wherein a first end of the first rod (21) is rotatably connected to the base (1), a second end of the first rod (21) is rotatably connected to a first end of the second rod (22), a second end of the second rod (22) is rotatably connected to a first end of the trigger member (23), a second end of the trigger member (23) is rotatably connected to the base (1), and a third end is protruding from the trigger member (23), the third end being protrudingly arranged between the first end and the second end; A limiting assembly (3), comprising a limiting rope, wherein the limiting rope can apply a pulling force to the first rod (21) along a preset direction, so that the third end of the trigger member (23) can press against the locking rod (101) to lock the split nut device (100); A rope-breaking assembly (4) is arranged on the base (1), and the rope-breaking assembly (4) is configured to fuse or cut the limiting rope, so that the first rod (21) that loses the tension drives the trigger member (23) to rotate and release the lock on the locking rod (101), and the split nut device (100) is unlocked.

2. The unlocking trigger device according to claim 1, characterized in that: A contact surface (231) is provided on the third end of the trigger member (23), and the contact surface (231) can contact the locking rod (101), and the movement direction of the contact surface (231) and the locking rod (101) form a first preset angle.

3. The unlocking trigger device according to claim 2, characterized in that: The abutment point between the locking rod (101) and the abutment surface (231) is an abutment point, the distance from the second end of the trigger member (23) to the abutment point is a first radius, the distance from the second end of the trigger member (23) to the first end of the trigger member (23) is a second radius, and the first radius is smaller than the second radius.

4. The unlocking trigger device according to claim 1, characterized in that: The limiting assembly (3) comprises a first support ear (31) and a second support ear (32), the first support ear (31) and the second support ear (32) are respectively arranged on both sides of the rope-breaking assembly (4), the distance between the first support ear (31) and the second end of the first rod (21) is L1, the distance between the second support ear (32) and the second end of the first rod (21) is L2, L1>L2, one end of the limiting rope is connected to the first support ear (31), the other end of the limiting rope is connected to the first rod (21), and at least part of the limiting rope abuts against the rope-breaking assembly (4); or; One end of the limiting rope is connected to the second support ear (32), the limiting rope is wound around the first support ear (31), and the other end of the limiting rope is connected to the first rod (21), and at least part of the limiting rope abuts against the rope breaking assembly (4).

5. The unlocking trigger device according to claim 4, characterized in that: A first rope threading hole (33) is provided between the first support ear (31) and the base (1), and a second rope threading hole (34) is provided between the second support ear (32) and the base (1). The first rope threading hole (33) and the second rope threading hole (34) are both arranged at a height lower than the rope-breaking assembly (4). The limiting rope can be passed through the first rope threading hole (33) and the second rope threading hole (34) so ​​that the limiting rope is closely attached to the rope-breaking assembly (4).

6. The unlocking trigger device according to claim 4, characterized in that: The first support ear (31) and the second support ear (32) are both constructed in an I-shape.

7. The unlocking trigger device according to claim 4, characterized in that: The first support ear (31) and the second support ear (32) are both provided with a protective coating.

8. The unlocking trigger device according to any one of claims 1 to 7, characterized in that: The rope-breaking assembly (4) comprises a heating resistor (41), wherein the heating resistor (41) is arranged on the base (1), and the heating resistor (41) is capable of melting the limit rope.

9. The unlocking trigger device according to any one of claims 1 to 7, characterized in that: The unlocking trigger device comprises two connecting rod assemblies (2), the two connecting rod assemblies (2) are arranged on the base (1), the two connecting rod assemblies (2) are respectively connected to one split nut device (100), the two first rods (21) of the two connecting rod assemblies (2) are both connected to the limiting assembly (3), and the rope breaking assembly (4) can enable the two split nut devices (100) to be unlocked synchronously.

10. The unlocking trigger device according to claim 9, characterized in that: The connecting rod assembly (2) further comprises a third rod (24), one end of the third rod (24) being rotationally connected to the trigger member (23), and the other end of the third rod (24) being rotationally connected to the locking rod (101) of the split nut device (100).

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