Locking and releasing device based on connecting rod type structure

Abstract

The invention relates to a locking and releasing device based on a connecting rod type structure, the locking and releasing device comprises a load connecting mechanism, a locking base, a pin puller, a pressing rod, two fasteners, an unlocking spring, a first connecting rod, a second connecting rod and a rotating rod, the upper end of the pressing rod is connected with the load connecting mechanism, and the lower end of the pressing rod is located in the locking base; the middles of the two fasteners are hinged into the locking base, a first connecting rod and a second connecting rod are hinged to the lower ends of the two fasteners respectively, the two ends of the rotating rod are hinged to the first connecting rod and the second connecting rod respectively, the middle of the rotating rod is hinged into the locking base, and the lower end of the unlocking spring is connected with the inner side of the bottom of the locking base. The upper end of the unlocking spring is connected with the lower side of one end of the rotating rod; the upper end of the fastening piece is connected with the pressing rod in a matched and clamped mode. The pin puller can clamp and release the rotating rod; in a locking state, the pin puller is used for clamping the rotating rod, and the unlocking spring is in a stretching state; and in the unlocking state, the pin puller releases the rotating rod, and the unlocking spring restores deformation and drives the rotating rod to rotate.

Description

Technical Field

[0001] The present invention relates to the field of aviation and aerospace related technologies, and in particular to a locking and releasing device based on a connecting rod structure. Background Art

[0002] The connection and release of payloads and vehicles are widely used, such as the stages of multi-stage rockets, satellites and launch vehicles, satellites and spacecraft, solar wings and spacecraft, unfolded antennas and spacecraft, etc. At present, the methods used are to connect and release based on pyrotechnic devices. Common pyrotechnic connection and release devices include compression seats based on explosive bolts, wrapping belts based on explosive bolts or pyrotechnic cutters, compression seats based on pyrotechnic separation nuts, compression seats based on pyrotechnic cutters, etc. The common feature of these compression and release devices is that they bear the connection force. In order to ensure the connection stiffness, the connection force often reaches thousands or even tens of thousands of N. The pyrotechnics as the main components themselves need to be destroyed, so they must be unlocked by the huge explosive impact force of gunpowder. This method is one-time use, resulting in high cost, and the explosive impact force is used to unlock, which is easy to cause damage to the spacecraft. In addition, the existing pyrotechnic device solutions have many parts and are complicated to assemble. In addition, due to the high price of pyrotechnics and the inability to be reused, ground tests can only be replaced with new devices after each use, which is not conducive to the development of commercial aerospace. Summary of the invention

[0003] In order to solve one or more of the technical problems existing in the prior art, the present invention provides a locking and releasing device based on a connecting rod structure.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a locking release device based on a connecting rod structure, comprising a load connection mechanism, a locking base, a pin puller, a clamping rod, two fastening members, an unlocking spring, a first connecting rod, a second connecting rod and a rotating rod, wherein the upper end of the clamping rod is connected to the load connection mechanism, and the lower end of the clamping rod is located in the locking base;

[0005] The middle parts of the two fastening members are hinged in the locking base, the lower ends of the two fastening members are hinged with the first connecting rod and the second connecting rod respectively, the two ends of the rotating rod are hinged with the first connecting rod and the second connecting rod respectively, the middle part of the rotating rod is hinged in the locking base, the lower end of the unlocking spring is connected to the inner side of the bottom of the locking base, and the upper end of the unlocking spring is connected to the lower side of one end of the rotating rod; the upper end of the fastening member is provided with a clamping section adapted to clamp with the pressing rod; the pin puller is installed on the side wall of the locking base and can realize the clamping and release of the rotating rod;

[0006] When in the locked state, the pin puller clamps the rotating rod, the upper ends of the two fastening members are closed and the clamping rod is clamped and positioned through the clamping section, and the unlocking spring is in a stretched state; when in the unlocked state, the pin puller releases the rotating rod, the unlocking spring restores its deformation and drives the rotating rod to rotate, and the rotating rod pulls the first connecting rod and the second connecting rod to open the upper ends of the two fastening members and release the clamping position with the clamping rod.

[0007] The beneficial effects of the present invention are as follows: the locking and releasing device of the present invention is based on a connecting rod structure, and adopts non-explosive unlocking, so that the impact of the overall unlocking is much smaller than that of the pyrotechnic unlocking device; the overall number of parts is small, so the overall installation is simple and reliable, and the overall weight is much reduced, which is more friendly to the aerospace field. The connecting rod, the rotating rod and the fastening piece are hinged in a structural manner, and the dead point is formed by the connecting rod and the fastening piece, and the dead point is formed by the connecting rod and the rotating rod in the locked state, so that the required unlocking force is greatly reduced.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, in the locked state, the first connecting rod, the second connecting rod and the rotating rod are on the same horizontal line, and the lower ends of the two fastening members are in a vertical state.

[0010] The beneficial effect of adopting the above further solution is: it is convenient to form a structural dead point between the connecting rod, the rotating rod and the fastening member, so that the device is very stable in the locked state, and the unlocking force required by the pin puller is very small.

[0011] Furthermore, an insert groove is provided at the lower end of the fastening piece, one end of the first connecting rod is inserted into the insert groove at the lower end of one fastening piece and is hinged to the lower end of the fastening piece through a first rotating shaft, and one end of the second connecting rod is inserted into the insert groove at the lower end of another fastening piece and is hinged to the lower end of the fastening piece through a second rotating shaft.

[0012] The beneficial effect of adopting the above further solution is that by providing the insertion groove, the hinge structure between the connecting rod and the fastening member is made more stable and reliable, and the linkage of each rod is smoother when unlocking and locking.

[0013] Furthermore, a hinge groove is provided at each end of the rotating rod, the other end of the first connecting rod is inserted into one of the hinge grooves and hinged to one end of the rotating rod through a third rotating shaft, and the other end of the second connecting rod is inserted into another hinge groove and hinged to the other end of the rotating rod through a fourth rotating shaft.

[0014] The beneficial effect of adopting the above further solution is that by providing the hinge groove, the hinge structure between the connecting rod and the rotating rod is made more stable and reliable, and the linkage of each rod is smoother when unlocking and locking.

[0015] Furthermore, the middle part of the rotating rod is hinged in the locking base through the fifth rotating shaft, and the middle parts of the two fastening members are hinged in the locking base through the sixth rotating shaft, and the first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft, the fifth rotating shaft and the sixth rotating shaft are all arranged in parallel.

[0016] Furthermore, a clamping rod is provided on the lower side of one end of the rotating rod, the upper end of the unlocking spring is connected to the clamping rod, and the pin puller is adapted to be clamped with the clamping rod.

[0017] The beneficial effect of adopting the above further solution is that by providing the clamping rod, it is convenient to connect with the unlocking spring and also convenient to adapt and clamp with the pin puller.

[0018] Furthermore, the clamping rod is an L-shaped structure.

[0019] Furthermore, a connecting ear plate for connecting an unlocking spring is provided on the inner side of the bottom of the locking base, and the connecting ear plate is arranged close to the other end of the rotating rod and is located obliquely below the other end of the rotating rod.

[0020] The beneficial effect of adopting the above further solution is that by reasonably setting the position of the connecting ear plate, the unlocking spring can effectively drive the rotating rod.

[0021] Furthermore, a limiting step is provided on the circumferential side of the lower end of the clamping rod, and the step surface of the limiting step is arranged to be gradually inclined downward from the inside to the outside, and the lower surface of the clamping section is adapted to be clamped with the step surface of the limiting step.

[0022] The beneficial effect of adopting the above-mentioned further scheme is: the fastening parts and the clamping rod are used for clamping and positioning, and the step surface of the limiting step is arranged to be gradually tilted downward from the inside to the outside, which successfully reduces the large clamping force greatly, so that the pin pulling force required by the pin puller is very small, and the unlocking and releasing is not only achieved by the pulling force of the unlocking spring.

[0023] Furthermore, the upper end of the locking base is an open structure, the lower end of the load connection mechanism is adapted to be disposed in the open structure and the peripheral side wall abuts against the inner side wall of the open structure;

[0024] A travel switch is arranged on the outer side wall of the locking base, and in the locking state, the lower surface of the load connecting mechanism presses the travel switch.

[0025] The beneficial effect of adopting the above further solution is that since there is surface-to-surface contact between the load connection mechanism and the locking base, the offset angle is very small after unlocking and separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The three-dimensional structure of the locking and releasing device based on the connecting rod structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 The three-dimensional structure of the locking and releasing device based on the connecting rod structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 3 It is a side structural schematic diagram of the locking state of the locking release device based on the connecting rod structure of the present invention;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0030] Figure 5 It is a schematic diagram of the front view of the locking state of the locking release device based on the connecting rod structure of the present invention;

[0031] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB;

[0032] Figure 7 It is a side structural schematic diagram of the locking release device based on the connecting rod structure of the present invention in the unlocked state;

[0033] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of AA;

[0034] Fig. 9 It is a schematic diagram of the front view of the locking release device based on the connecting rod structure of the present invention in the unlocked state;

[0035] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of the middle BB;

[0036] Fig.11 It is a schematic diagram of the front view of the structure of the locking release device based on the connecting rod structure of the present invention after the load connection mechanism is unlocked and separated from the locking base;

[0037] Fig.12 It is a side view structural schematic diagram of the load connection mechanism being separated from the locking base after the locking release device based on the connecting rod structure of the present invention is unlocked;

[0038] Fig.13 for Fig.12 Schematic diagram of the cross-sectional structure of AA;

[0039] Fig.14 It is a schematic diagram of the three-dimensional structure of the rotating rod of the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0041] 1. Lock the base; 11. Connect the ear plate; 12. Support frame;

[0042] 2. Clamping rod; 21. Limiting step; 22. Clamping nut;

[0043] 3. Fastening member; 31. Insertion slot; 32. First rotating shaft; 33. Second rotating shaft; 34. Clamping section;

[0044] 4. unlocking spring; 5. first connecting rod; 51. second connecting rod; 52. rotating rod; 53. hinge groove; 54. third rotating shaft; 55. fourth rotating shaft; 56. fifth rotating shaft; 57. sixth rotating shaft; 58. clamping rod;

[0045] 6. Travel switch; 7. Load connection mechanism; 8. Pin puller. DETAILED DESCRIPTION

[0046] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0047] like Figure 1 to Figure 14 As shown, a locking release device based on a connecting rod structure of this embodiment includes a load connection mechanism 7, a locking base 1, a pin puller 8, a clamping rod 2, two fastening members 3, an unlocking spring 4, a first connecting rod 5, a second connecting rod 51 and a rotating rod 52, wherein the upper end of the clamping rod 2 is connected to the load connection mechanism 7, and the lower end of the clamping rod 2 is located in the locking base 1;

[0048] The middle parts of the two fastening members 3 are hinged in the locking base 1, and the lower ends of the two fastening members 3 are hinged with the first connecting rod 5 and the second connecting rod 51 respectively. The two ends of the rotating rod 52 are hinged with the first connecting rod 5 and the second connecting rod 51 respectively. The middle part of the rotating rod 52 is hinged in the locking base 1, and the lower end of the unlocking spring 4 is connected to the inner side of the bottom of the locking base 1, and the upper end of the unlocking spring 4 is connected to the lower side of one end of the rotating rod 52; the upper end of the fastening member 3 is provided with a clamping section 34 adapted to clamp with the pressing rod 2; the pin puller 8 is installed on the side wall of the locking base 1 and can realize the clamping and releasing of the rotating rod 52;

[0049] When in the locked state, the pin puller 8 clamps the rotating rod 52, the upper ends of the two fastening members 3 are closed and the clamping rod 2 is clamped and positioned through the clamping section 34, and the unlocking spring 4 is in a stretched state; when in the unlocked state, the pin puller 8 releases the rotating rod 52, the unlocking spring 4 restores its deformation and drives the rotating rod 52 to rotate, and the rotating rod 52 pulls the first connecting rod 5 and the second connecting rod 51 to open the upper ends of the two fastening members 3 and release the clamping position with the clamping rod 2.

[0050] Specifically, the load connection mechanism 7 may adopt a load connection flange, and the upper end of the clamping rod 2 may be locked and fixed to the middle of the load connection mechanism 7 by a clamping nut 22 .

[0051] like Figure 4 As shown, the fastening member 3 of this embodiment adopts a 7-shaped structure.

[0052] like Figure 4 As shown, in the locked state, the first connecting rod 5, the second connecting rod 51 and the rotating rod 52 are on the same horizontal line, and the lower ends of the two fastening members 3 are in a vertical state. It is convenient to form a structural dead point between the connecting rod, the rotating rod and the fastening member, so that the device is very stable in the locked state, and the unlocking force required by the pin puller is very small.

[0053] like Figure 4 , Figure 6 , Figure 8 , Fig.10 and Fig.13 As shown, the lower end of the fastening member 3 of this embodiment is provided with an insertion groove 31, one end of the first connecting rod 5 is inserted into the insertion groove 31 at the lower end of one fastening member 3 and is hinged to the lower end of the fastening member 3 through a first rotating shaft 32, and one end of the second connecting rod 51 is inserted into the insertion groove 31 at the lower end of another fastening member 3 and is hinged to the lower end of the fastening member 3 through a second rotating shaft 33. By providing the insertion groove, the hinge structure between the connecting rod and the fastening member is more stable and reliable, and the linkage of each rod is smoother when unlocking and locking.

[0054] like Figure 4 , Figure 6 , Figure 8 , Fig.10 , Fig.13 and Fig.14 As shown, in this embodiment, both ends of the rotating rod 52 are provided with a hinge groove 53, the other end of the first connecting rod 5 is inserted into one of the hinge grooves 53 and is hinged to one end of the rotating rod 52 through the third rotating shaft 54, and the other end of the second connecting rod 51 is inserted into another hinge groove 53 and is hinged to the other end of the rotating rod 52 through the fourth rotating shaft 55. By providing the hinge grooves, the hinge structure between the connecting rod and the rotating rod is more stable and reliable, and the linkage of each rod is smoother when unlocking and locking.

[0055] like Figure 4 , Figure 6 , Figure 8 , Fig.10 , Fig.13 As shown, the middle part of the rotating rod 52 of this embodiment is hinged in the locking base 1 through the fifth rotating shaft 56, and the middle parts of the two fastening parts 3 are hinged in the locking base 1 through the sixth rotating shaft 57, and the first rotating shaft 32, the second rotating shaft 33, the third rotating shaft 54, the fourth rotating shaft 55, the fifth rotating shaft 56 and the sixth rotating shaft 57 are all arranged in parallel.

[0056] like Figure 4 , Figure 8, Fig.13 and Fig.14 As shown, a clamping rod 58 is provided at the lower side of one end of the rotating rod 52 of this embodiment, the upper end of the unlocking spring 4 is connected to the clamping rod 58, and the pin puller 8 is adapted to be clamped with the clamping rod 58. By providing the clamping rod, it is convenient to connect with the unlocking spring and also convenient to be adapted to be clamped with the pin puller.

[0057] like Fig.14 As shown, the clamping rod 58 of this embodiment is an L-shaped structure. One section of the clamping rod 58 is arranged vertically, and the other section extends horizontally. The other section of the horizontally extending structure is arranged parallel to the first rotating shaft 32, and the pin of the pin puller can be abutted against the horizontally extending structure. A connecting hole is opened on the vertically arranged structure, so that the upper end of the unlocking spring 4 is hung in the connecting hole.

[0058] like Figure 4 , Figure 8 , Fig.13 As shown, the inner side of the bottom of the locking base 1 of this embodiment is provided with a connecting ear plate 11 for connecting the unlocking spring 4, and the connecting ear plate 11 is arranged close to the other end of the rotating rod 52 and is located obliquely below the other end of the rotating rod 52. By reasonably setting the position of the connecting ear plate, it is convenient for the unlocking spring to effectively drive the rotating rod.

[0059] like Figure 4 , Figure 8 , Fig.13 As shown, a limiting step 21 is provided on the circumferential side of the lower end of the clamping rod 2 of this embodiment, and the step surface of the limiting step 21 is arranged to be gradually tilted downward from the inside to the outside, and the lower surface of the clamping section 34 is adapted to be clamped with the step surface of the limiting step 21. The fastening member is used to clamp and position the clamping rod, and the step surface of the limiting step is arranged to be gradually tilted downward from the inside to the outside, which successfully reduces the large clamping force, so that the pin pulling force required by the pin puller is very small, and the unlocking is not only unlocked by the tension of the unlocking spring when unlocking and releasing.

[0060] like Figure 4 , Figure 8 , Fig.11 , Fig.13 As shown, the upper end of the locking base 1 of this embodiment is an open structure, the lower end of the load connection mechanism 7 is adapted to be arranged in the open structure and the peripheral side wall abuts against the inner side wall of the open structure; Figure 1 to Figure 3 , Figure 5 , Figure 7 and Fig. 9 As shown, a travel switch 6 is provided on the outer wall of the locking base 1. In the locked state, the lower surface of the load connection mechanism 7 presses the travel switch 6. Since there is surface contact between the load connection mechanism and the locking base, the guided unlocking makes the offset angle very small after unlocking and separation.

[0061] The pin puller of this embodiment can use any form of pin puller, including memory alloy pin puller, electromagnetic pin puller, etc.

[0062] Specifically, Figure 4 As shown, a support frame 12 can be set in the locking base 1, so that the two fastening parts 3 are respectively hinged on both sides of the support frame 12, and the first connecting rod 5, the second connecting rod 51 and the rotating rod 52 are located below the support frame, so that the lower end of the clamping rod 2 can abut against the support frame 12.

[0063] In this embodiment, the locking and releasing device based on the connecting rod structure is in the locked state. First, the locking seat base is fixedly connected to the lower fixed plate or the fixed load by screws, and the release load or other objects (including the satellite body or other loads) are fixedly connected to the load connection mechanism (such as the load connection flange, etc.) by screws. The pin of the pin puller blocks the clamping rod, and the unlocking spring is in a stretched state at this time. Since the rotating rod, the first connecting rod and the second connecting rod are on the same line at this time, a dead point is formed. The first connecting rod, the second connecting rod and the two fastening parts form a right-angle dead point. Furthermore, a large mass load can be connected so that the force transmitted from the upper side to the lower side is relatively small. The upper surfaces of the two fastening members and the lower end of the pressing rod are pressed against each other. Since the two fastening members are at a 90° angle with the first connecting rod and the second connecting rod in the locked state, a primary dead point is formed, so that the upward pulling force of the load is converted into an inward thrust. Furthermore, since the rotating rod is in a straight line with the first connecting rod and the second connecting rod, another dead point is formed, so that it is in a stable state in the locked state, so that the unlocking force of the pin puller is greatly reduced when unlocking, and the force borne by the pin puller is only the pulling force brought by the unlocking spring. At this time, the entire locking release device is in a compressed state.

[0064] When in the unlocked state, first the pin of the pin puller is pulled out by powering on or other means, and the rotating rod rotates clockwise under the pulling force of the unlocking spring because there is no obstruction from the pin of the pin puller. At this time, the connecting rod is linked by the rotating rod, and the two fastening parts rotate outward around the rotating axis under the drive of the rotating rod and the connecting rod, so that the clamping rod can be separated from the two fastening parts. At the same time, due to the clamping action of the clamping nut, the clamping rod, the clamping nut and the load connecting flange are integrated, so that the upper load (that is, the fixed load) and the lower load (the released load) are separated.

[0065] This embodiment is based on a locking release device with a connecting rod structure. It uses non-explosive unlocking, so that the impact of the overall unlocking is much smaller than that of the pyrotechnic unlocking device. The overall number of parts is small, making the overall installation simple and reliable, and the overall weight is much lower, which is more friendly to the aerospace field. The connecting rod, rotating rod and fastener are hinged in a structural manner. In the locked state, the connecting rod and the fastener form a dead point, and the connecting rod and the rotating rod form a dead point, so that the required unlocking force is greatly reduced.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A locking and releasing device based on a connecting rod structure, characterized in that: It includes a load connection mechanism, a locking base, a pin puller, a clamping rod, two fastening members, an unlocking spring, a first connecting rod, a second connecting rod and a rotating rod, wherein the upper end of the clamping rod is connected to the load connection mechanism, and the lower end of the clamping rod is located in the locking base; The middle parts of the two fastening members are hinged in the locking base, the lower ends of the two fastening members are hinged with the first connecting rod and the second connecting rod respectively, the two ends of the rotating rod are hinged with the first connecting rod and the second connecting rod respectively, the middle part of the rotating rod is hinged in the locking base, the lower end of the unlocking spring is connected to the inner side of the bottom of the locking base, and the upper end of the unlocking spring is connected to the lower side of one end of the rotating rod; the upper end of the fastening member is provided with a clamping section adapted to clamp with the pressing rod; the pin puller is installed on the side wall of the locking base and can realize the clamping and release of the rotating rod; When in the locked state, the pin puller clamps the rotating rod, the upper ends of the two fastening members are closed and the clamping rod is clamped and positioned through the clamping section, and the unlocking spring is in a stretched state; when in the unlocked state, the pin puller releases the rotating rod, the unlocking spring restores its deformation and drives the rotating rod to rotate, and the rotating rod pulls the first connecting rod and the second connecting rod to open the upper ends of the two fastening members and release the clamping position with the clamping rod.

2. A locking and releasing device based on a connecting rod structure according to claim 1, characterized in that: In the locked state, the first connecting rod, the second connecting rod and the rotating rod are on the same horizontal line, and the lower ends of the two fastening members are in a vertical state.

3. According to claim 1, a locking and releasing device based on a connecting rod structure is characterized in that: The lower end of the fastening piece is provided with an insertion groove, one end of the first connecting rod is inserted into the insertion groove at the lower end of one fastening piece and is hinged to the lower end of the fastening piece through a first rotating shaft, and one end of the second connecting rod is inserted into the insertion groove at the lower end of another fastening piece and is hinged to the lower end of the fastening piece through a second rotating shaft.

4. A locking and releasing device based on a connecting rod structure according to claim 3, characterized in that: A hinge groove is respectively provided at both ends of the rotating rod, the other end of the first connecting rod is inserted into one of the hinge grooves and is hinged to one end of the rotating rod through the third rotating shaft, and the other end of the second connecting rod is inserted into another hinge groove and is hinged to the other end of the rotating rod through the fourth rotating shaft.

5. A locking and releasing device based on a connecting rod structure according to claim 4, characterized in that: The middle part of the rotating rod is hinged in the locking base through the fifth rotating shaft, and the middle parts of the two fastening members are hinged in the locking base through the sixth rotating shaft. The first rotating shaft, the second rotating shaft, the third rotating shaft, the fourth rotating shaft, the fifth rotating shaft and the sixth rotating shaft are all arranged in parallel.

6. The locking and releasing device based on the connecting rod structure according to claim 1, characterized in that: A clamping rod is provided at the lower side of one end of the rotating rod, the upper end of the unlocking spring is connected to the clamping rod, and the pin puller is adapted to be clamped with the clamping rod.

7. A locking and releasing device based on a connecting rod structure according to claim 6, characterized in that: The clamping rod is an L-shaped structure.

8. The locking and releasing device based on the connecting rod structure according to claim 1, characterized in that: A connecting ear plate for connecting an unlocking spring is provided on the inner side of the bottom of the locking base, and the connecting ear plate is arranged close to the other end of the rotating rod and is located obliquely below the other end of the rotating rod.

9. The locking and releasing device based on the connecting rod structure according to claim 1, characterized in that: A limiting step is provided on the circumferential side of the lower end of the clamping rod, and the step surface of the limiting step is arranged to be gradually inclined downward from the inside to the outside, and the lower surface of the clamping section is adapted to be clamped with the step surface of the limiting step.

10. The locking and releasing device based on the connecting rod structure according to claim 1, characterized in that: The upper end of the locking base is an open structure, the lower end of the load connection mechanism is adapted to be disposed in the open structure and the peripheral side wall abuts against the inner side wall of the open structure; A travel switch is arranged on the outer side wall of the locking base, and in the locking state, the lower surface of the load connecting mechanism presses the travel switch.

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