Unlocking trigger device

Abstract

The invention belongs to the technical field of aerospace, and discloses an unlocking trigger device. The unlocking triggering device is used for unlocking the split nut device, the split nut device comprises a movable locking rod, the unlocking triggering device comprises a base, a connecting rod assembly, a limiting rope and a rope breaking assembly, the connecting rod assembly comprises a first rod, a second rod and a triggering piece, the first end of the first rod is rotationally connected with the base, and the second end of the first rod is rotationally connected with the limiting rope; the second end of the first rod is rotationally connected with the first end of the second rod, the second end of the second rod is rotationally connected with the first end of the triggering piece, the second end of the triggering piece is rotationally connected with the base, and the limiting rope can apply pulling force to the first rod in the preset direction so that the third end of the triggering piece can abut against the locking rod and lock the split nut device. And the rope breaking assembly is arranged on the base and is configured to fuse or cut off the limiting rope, so that the triggering piece rotates and releases locking of the locking rod and unlocking of the split nut device, the pressing force can be improved, the locking and releasing capacity can be improved, and efficient and reliable unlocking operation can be achieved.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, and in particular to an unlocking trigger device of a compression release device. Background Art

[0002] As aerospace and related precision fields continue to develop, the application of hot knife unlocking trigger devices for non-pyrotechnic devices is becoming more and more widespread. Hot knife type clamping release devices mostly use thermal fuse rope rings, and commonly used materials include Dyneema rope and Kevlar rope. Due to the creep characteristics of Dyneema rope itself, it is only suitable for small mass loads, such as tape antennas, micro-satellite solar arrays, etc. Although Kevlar rope has better mechanical properties, it has a higher melting point, and the corresponding heating component preparation process is complicated. High temperature can easily damage the circuit, resulting in a limited number of uses of the hot knife device.

[0003] The existing thermally-fuse Hercules rope-type clamping and releasing device only relies on the elastic potential energy of the spring to overcome the friction force to do 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, the split nut device is used as a clamping and releasing device. The limiting force of the split nut device alone often exceeds the tensile force that the currently commonly used wire diameter rope can withstand. Affected by creep, the split nut device has the risk of mislocking 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 a longer unlocking time and increased power consumption.

[0004] Therefore, a new unlocking trigger device is urgently needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an unlocking trigger device, which can increase the clamping force, improve the locking and releasing ability when facing a large area and a large mass load, and realize a more efficient and reliable unlocking operation.

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

[0007] The unlocking trigger device is used to unlock the split nut device, the split nut device includes a movable locking rod, and the unlocking trigger device includes:

[0008] Pedestal;

[0009] A connecting rod assembly, comprising a first rod, a second rod and a trigger member, wherein 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 protruded from the trigger member;

[0010] A limiting assembly, comprising a limiting rope, wherein 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;

[0011] A rope-breaking assembly is arranged on the base and is configured to fuse or cut the limit rope so that the trigger member rotates and releases the locking of the locking rod, thereby unlocking the split nut device.

[0012] As an optional solution, an abutment surface is provided on the third end of the trigger member, and the abutment surface can abut against the locking rod, and the abutment surface and the movement direction of the locking rod form a first preset angle.

[0013] As an optional solution, the abutment point between the locking rod and the abutment surface is the abutment point, the distance from the second end of the trigger member to the abutment point is the first radius, the distance from the second end of the trigger member to the first end of the trigger member is the second radius, and the first radius is smaller than the second radius.

[0014] As an optional solution, the limiting assembly 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 assembly, the distance from the first ear to the second end of the first rod is L1, the distance from the second ear to the second end of the first rod is L2, 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 assembly; or;

[0015] One end of the limiting rope is connected to the second support ear, the limiting rope is wound around the first support ear, and the other end of the limiting rope is connected to the first rod, and at least a part of the limiting rope is in contact with the rope breaking assembly.

[0016] As an optional solution, a first rope threading hole is provided between the first support ear and the base, and a second rope threading hole is provided between the second support ear and the base. The heights of the first rope threading hole and the second rope threading hole are both lower than the rope breaking assembly. The limiting rope can pass through the first rope threading hole and the second rope threading hole so that the limiting rope is tightly attached to the rope breaking assembly.

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

[0018] As an optional solution, the first ear and the second ear are both provided with a protective coating.

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

[0020] As an optional solution, the unlocking trigger device includes two connecting rod assemblies, the two connecting rod assemblies are arranged on the base, the two connecting rod assemblies are respectively connected to one of the split nut devices, the two first rods of the two connecting rod assemblies are connected to the limit assembly, and the rope breaking assembly can synchronously unlock the two split nut devices.

[0021] As an optional solution, the connecting rod assembly also includes a third rod, one end of which is rotatably connected to the trigger member, and the other end of which is rotatably connected to the locking rod of the split nut device.

[0022] Beneficial effects:

[0023] The present invention provides an unlocking trigger device. When the unlocking trigger device is working, the limit rope applies a pulling force to the first rod, so that the third end of the trigger member presses 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 the limit rope, and the first rod without 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 unlocked immediately. Through the clever coordination of the connecting rod assembly and the limit assembly, the rope breaking assembly is used to control the melting or cutting of the limit rope, and then control the unlocking of the split nut device. The unlocking trigger device can increase the pressing force and the locking release capability when facing a large area and a large mass load, realize a more efficient and reliable unlocking operation, and reduce the cost of the unlocking trigger device at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0028] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0029] Figure 6 yes Figure 4 Enlarged view of point B in the middle.

[0030] In the figure:

[0031] 1. Base;

[0032] 2. connecting rod assembly; 21. first rod; 211. rope winding groove; 22. second rod; 23. trigger member; 231. abutment surface; 24. third rod;

[0033] 3. Limiting assembly; 31. First support ear; 32. Second support ear; 33. First rope threading hole; 34. Second rope threading hole;

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

[0035] 100. Split nut device; 101. Locking rod; 102. Main body; 103. Oblong hole. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified 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 an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figure 1-Figure 3 As shown, the split nut device 100 includes a locking rod 101, a main body 102 and an elastic reset member (not shown in the figure), at least part of the locking rod 101 is movably arranged in the main body 102, an oblong hole 103 is opened on the main body 102, the locking rod 101 passes through the oblong hole 103, the locking rod 101 can move along the length direction of the oblong hole 103, the elastic reset member is arranged in the main body 102, the elastic reset member is connected or abutted with 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 stretches and can push the locking rod 101 to move relative to the main body 102, and the unlocking action of the split nut device 100 is completed.

[0041] Specifically, components with large areas and large mass loads can be threadedly connected to the main body 102, and the movement of the locking rod 101 directly affects the connection and separation between the component and the main body 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 102, and the component and the main body 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 102 loses its constraint. The component is separated from the main body 102 by its own gravity or other external pulling force, and finally the unlocking and separation action of the component and the main body 102 is completed. The split nut device 100 belongs to the existing mature technology and will not be described in detail here.

[0042] This embodiment provides an unlocking trigger device, such as Figure 1-Figure 3 As shown, the unlocking trigger device is used to unlock the split nut device 100, and the unlocking trigger device includes a base 1, a connecting rod assembly 2, a limiting assembly 3 and a rope breaking assembly 4. The connecting rod 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, and the second end of the trigger member 23 is rotatably connected to the base 1. The trigger member 23 is provided with a third end protruding between the first end and the second end. The limiting assembly 3 includes a limiting rope, which 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 limit rope, so that the trigger member 23 rotates and releases the lock on 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 Figure 1-Figure 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 Figure 2-Figure 3As shown, the shape of the trigger member 23 is similar to a triangle, and the surface on the third end of the trigger member 23 that is away from the abutment surface 231 is a guide surface. The guide surface and the movement direction of the locking rod 101 form a second preset angle. When the trigger member 23 rotates and releases the lock on the locking rod 101, and the split nut device 100 is unlocked, the locking rod 101 abuts against the guide surface. In the locking stage, the triangular structure ensures that the trigger member 23 stably presses the locking rod 101. When the trigger member 23 rotates to unlock, the guide surface guides the locking rod 101 to move smoothly, so that the locking rod 101 abuts against the guide surface, avoiding jamming or collision with surrounding parts, and ensuring that the unlocking process of the split nut device 100 is smooth and efficient.

[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., which is not specifically limited here.

[0049] like Figure 1-Figure 3 As shown, the abutment point between the locking rod 101 and the abutment surface 231 is the abutment point, the distance from the second end of the trigger member 23 to the abutment point is the first radius, the distance from the second end of the trigger member 23 to the first end of the trigger member 23 is the second radius, and the first radius is smaller than the second radius. Since the first radius is 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 abutment point, the trigger member 23 can generate a larger force to press the locking rod 101, thereby ensuring the stability of the lock. When unlocking is required, the smaller first radius also allows the trigger member 23 to rotate a smaller angle, so that the abutment point can be quickly separated from the locking rod 101, and the unlocking action is quick and sensitive. This design of radius difference not only strengthens the locking effect, but also improves the efficiency of unlocking, thereby ensuring that the split nut device 100 can operate reliably.

[0050] like Figure 1-Figure 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, the distance from the second ear 32 to the second end of the first rod 21 is L2, 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 is in contact with the rope-breaking assembly 4. The first ear 31 and the second ear 32 are separated on both sides of the rope-breaking assembly 4, and L1>L2. This layout allows the limiting rope to form a specific tension distribution. On the one hand, under normal conditions, the limiting rope can stably transfer the tension from the first ear 31 to the first rod 21, so that the trigger member 23 keeps pressing against the locking rod 101, and maintains the locking state of the split nut device 100. On the other hand, when the rope breaking assembly 4 is actuated and the limiting rope is cut off, this connection method can ensure that the first rod 21 quickly senses the disappearance of the tension, and promptly drives the trigger member 23 to rotate, thereby releasing the lock on the locking rod 101 and realizing the rapid unlocking of the split nut device 100.

[0051] In other embodiments, one end of the limit rope is connected to the second ear 32, the limit rope is wound around the first ear 31, and the other end of the limit rope is connected to the first rod 21, and at least part of the limit rope is in contact with the rope breaking component 4. The limit rope passes through the rope breaking component 4 twice and is connected to the first ear 31 and the second ear 32 respectively, and finally connected to the first rod 21, that is, there are two sections of the limit rope in contact with the rope breaking component 4, forming a more stable and sensitive limit structure. During normal operation, it can ensure that a stable tension is applied to the first rod 21, maintain the effective pressure of the trigger member 23 on the locking rod 101, and ensure that the split nut device 100 is reliably locked. Once the rope breaking component 4 is activated, the tension at both ends of the limit rope disappears at the same time. With this double connection design, the first rod 21 can respond quickly and accurately, driving the trigger member 23 to quickly release the lock on 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 on 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, so that the position of the limiting rope on the first rod 21 is fixed and stable, and the limiting rope is prevented from sliding, deflecting, etc. during operation, ensuring that the direction of the tension applied by the limiting rope to the first rod 21 is always consistent, so that the trigger member 23 can stably press or release 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 is actuated, the first rod 21 can respond to the change of the tension of the limiting rope more quickly and accurately, thereby improving the reliability and sensitivity of the unlocking process of the split nut device 100.

[0053] like Figure 1-Figure 3 As shown, 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 heights of the first rope threading hole 33 and the second rope threading hole 34 are both lower than the rope breaking component 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 component 4. When the rope breaking component 4 is actuated, the limiting rope can be quickly cut off because the limiting rope is closely attached to the rope breaking component 4, and the first rope threading hole 33 and the second rope threading hole 34 can guide the limiting rope to quickly disengage, so that the first rod 21 can respond to the disappearance of the pulling force in time, drive the trigger member 23 to accurately unlock, and improve the working stability of the unlocking trigger device and the timeliness of unlocking.

[0054] like Figure 1-Figure 3 As shown, the first ear 31 and the second ear 32 are both 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 limit rope, ensuring that the limit rope is firmly connected to prevent loosening or falling off during operation. On the other hand, the slender middle part of the I-shape can make multiple sections of limit ropes or multiple limit ropes gather toward the center of the rope breaking assembly 4, so that the rope breaking assembly 4 can cut off or fuse the limit rope more quickly, and then the trigger member 23 can accurately and stably lock and unlock the locking rod 101. In addition, the I-shaped structure ensures that the ear has sufficient strength while effectively reducing its own weight, thereby optimizing the material utilization efficiency of the overall unlocking trigger device.

[0055] In this embodiment, a protective coating is provided on both the first ear 31 and the second ear 32. The 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 by moisture, rust or chemical erosion, and greatly extend their service life. During the frequent pulling of the limit rope, the protective coating can reduce the friction coefficient on the surface of the first ear 31 and the second ear 32, reduce the wear between the limit rope and the first ear 31 and the second ear 32, ensure that the limit rope always maintains a good working state, stably transmits the pulling force to the first rod 21, and provides solid support for the trigger member 23 to accurately lock and unlock the locking rod 101, thereby improving the unlocking stability of the split nut device 100.

[0056] like Figure 1-Figure 3As shown, the rope breaking assembly 4 includes a heating resistor 41, and the heating resistor 41 is arranged on the base 1, and the heating resistor 41 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, it is only necessary to energize the heating resistor 41 to quickly generate heat, and this heat can accurately and efficiently melt the limit rope without complicated mechanical operations. Compared with other cutting methods, heating and fusing are 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 power on and off control can be easily realized through the circuit, and the timing of fusing can be accurately grasped to ensure that the limit rope is cut off at the right time, so that the first rod 21 drives the trigger member 23 to quickly release the lock on the locking rod 101, thereby 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, which is disposed on the base 1 and is capable of cutting the limit rope. When the split nut device 100 needs to be unlocked, the cutter can quickly cut the limit rope, and the cutting action of the cutter is crisp and responsive, and the tension of the limit rope on the first rod 21 can be instantly released. Compared with the fusing 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, releases the lock on the locking rod 101, and quickly unlocks the split nut device 100, providing a strong guarantee for the efficient unlocking of the unlocking trigger device.

[0058] like Figure 4-Figure 6 As shown, the unlocking trigger device includes two connecting rod assemblies 2, which are arranged on the base 1, and the two connecting rod assemblies 2 are respectively connected to a split nut device 100, and the two first rods 21 of the two connecting rod assemblies 2 are both connected to the limit assembly 3, and the rope breaking assembly 4 can make the two split nut devices 100 unlock synchronously. The two connecting rod 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, the two split nut devices 100 can be unlocked synchronously, which reduces the complex operation of individually controlling the unlocking of multiple split nut devices 100, simplifies the control process, reduces the failure rate, and can ensure smooth unlocking action in some scenes that require collaborative operation, improve work efficiency, and enhance unlocking reliability.

[0059] like Figure 4-Figure 6As shown, the connecting rod assembly 2 also includes a third rod 24, one end of which 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, which effectively enhances the mechanical transmission 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 more accurately and smoothly transmitted to the locking rod 101, ensuring that the split nut device 100 is firmly locked; 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 move quickly, so as to achieve rapid unlocking of the split nut device 100 and improve the unlocking efficiency. At the same time, the rotation connection mode of the third rod 24 can also flexibly adapt to different working angles and position changes, improve the adaptability of the unlocking trigger device to complex working conditions, and enhance the flexibility of the arrangement of the split nut device 100.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should 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); 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 limit rope, so that the trigger member (23) rotates and releases 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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