Multi-functional interface repeatable heavy load locking mechanism

Abstract

This invention relates to a multifunctional, repeatable, high-load-bearing locking mechanism for interfaces, belonging to the field of on-orbit assembly technology. It solves the problems of high vibration and low reliability in locking mechanisms. It includes an active end and a passive end. The active end includes a separation spring, a body, a third pull rod, a second pull rod, a first pull rod, a small shaft, a spring, a locking hook, and a drive structure. One end of the second pull rod is connected to the body, and the other end is connected to the third pull rod and one end of the first pull rod. The other end of the third pull rod is connected to the drive structure. The other end of the first pull rod is connected to one end of the locking hook via the small shaft. The other end of the locking hook is connected to the body via the spring, establishing a connection between the locking hook and the body. The small shaft is slidably connected to the body. A separation spring is installed on the body, and the separation spring, locking hook, and passive end establish a connection. This invention can withstand large loads and maintain a stable connection under harsh environments such as vibration and impact, thereby improving the reliability and safety of the entire system.

Description

Technical Field

[0001] This invention relates to a repeatable locking mechanism, belonging to the field of on-orbit assembly technology. Background Technology

[0002] With the rapid development of the global space industry, especially the construction and application of space stations, space shuttles, and space robots in the field of deep space exploration and on-orbit services, the locking and separation technology between spacecraft or spacecraft components is a key technology for on-orbit maintenance, service and support, and is widely used in space.

[0003] In the aerospace field, repeatable, high-load-bearing locking mechanisms are a key technology used to ensure reliable connection and fixation of spacecraft and aerospace equipment in extreme environments. Spacecraft and aerospace equipment in orbit need to operate under harsh conditions such as extreme vibration, high temperature, and vacuum. Therefore, the locking mechanism must possess sufficient strength and rigidity to ensure the stability and safety of the connection.

[0004] Most commonly used locking and releasing devices are based on the working principle of pyrotechnic explosions. They have advantages such as high load-bearing capacity, simple structure, and rapid separation. They are widely used in the aerospace field and are relatively mature single-unit products. However, pyrotechnic locking and separating devices have insurmountable drawbacks, such as strong vibration and impact during unlocking and separation, which may damage additional products such as electronic components. They also generate a lot of additional contaminants after unlocking, and their structure is not reusable. These shortcomings make them unable to meet the needs of on-orbit maintenance and service.

[0005] Shape memory alloy locking and releasing devices, with their advantages of being pollution-free and resetting, have replaced some pyrotechnic locking mechanisms. However, their low driving force, low reliability, and long response time still limit their applications. Electromagnetic locking and releasing devices, due to their working principle, are more suitable for flexible docking applications. However, due to the limitations of their working principle, locking or unlocking failures can occur. In addition, the electric drive control of magnetic force conversion leads to a more complex structure.

[0006] Therefore, there is an urgent need to propose a repeatable, high-load-bearing locking mechanism for multifunctional interfaces to solve the above-mentioned technical problems. Summary of the Invention

[0007] The purpose of this invention is to solve the problems of high vibration and low reliability in locking mechanisms, and to provide a repeatable, high-load-bearing locking mechanism for multifunctional interfaces. A brief overview of the invention is given below to provide a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0008] The technical solution of the present invention:

[0009] A multifunctional interface repeatable high-load locking mechanism includes an active end and a passive end. The active end includes a separation spring, a body, a third pull rod, a second pull rod, a first pull rod, a small shaft, a spring, a locking hook, and a drive structure. One end of the second pull rod is connected to the body, and the other end of the second pull rod is connected to the third pull rod and one end of the first pull rod. The other end of the third pull rod is connected to the drive structure. The other end of the first pull rod is connected to one end of the locking hook via the small shaft, and the other end of the locking hook is connected to the body via the spring. The locking hook and the body are engaged. The small shaft is slidably connected to the body. A separation spring is provided on the body, and the separation spring, the locking hook, and the passive end are engaged.

[0010] Preferred configuration: The small shaft is connected to the locking hook and the first pull rod key.

[0011] Preferably, the machine body includes a base frame and a vertical frame. The vertical frame is fixedly mounted on the base frame. A vertical groove is machined on the vertical frame. A small shaft is mounted in the groove and is slidably connected to the machine body through the groove of the vertical frame.

[0012] Preferred configuration: The drive structure includes a planetary reducer, a motor, a lead screw, a lead screw nut, a bearing bracket, and a positioning nut. The motor and bearing bracket are mounted on the machine body. The lead screw nut is connected to the bearing bracket and the positioning nut. The end of the lead screw nut is connected to the output end of the motor through the planetary reducer. The lead screw nut is threaded to one end of the lead screw, and the other end of the lead screw is connected to the third tie rod.

[0013] Preferably, the active end further includes a first bearing, a fifth shaft, a sixth shaft, and a seventh shaft. The small shaft is connected to the machine body through the first bearing. One end of the second pull rod is rotatably connected to the machine body through the sixth shaft. The other end of the second pull rod is rotatably connected to the third pull rod and one end of the first pull rod through the seventh shaft. The other end of the third pull rod is rotatably connected to the lead screw of the drive structure through the fifth shaft.

[0014] Preferably, there are four release springs, which are symmetrically arranged on both sides of the lock hook.

[0015] Preferably, the passive end includes a coupling ring, a trunnion, and a disc spring. The coupling ring is coaxially arranged with the trunnion, and a disc spring is provided between the coupling ring and the trunnion. The trunnion has a connecting hole in the middle, and the middle of the trunnion is engaged with the other end of the locking hook. The coupling ring is engaged with the release spring.

[0016] Preferably, the passive end further includes disc spring guide rods, and the adapter ring is provided with a plurality of circumferentially arranged disc spring guide rods, on which disc springs are fitted, and the disc spring guide rods are connected to the adapter ring.

[0017] Preferably, the active end is fixed on the base plate, and the passive end is moved to the capture range of the active end by a robotic arm and then locked.

[0018] The present invention has the following beneficial effects:

[0019] This invention can withstand large loads and maintain a stable connection under harsh environments such as vibration and impact, thereby improving the reliability and safety of the entire system.

[0020] This invention enables simple disassembly and assembly, which is very important for equipment maintenance, replacement, and modification.

[0021] This invention is reusable and can improve maintenance efficiency.

[0022] This invention employs a crank-connecting rod mechanism to achieve the effect of increasing distance and reducing force within a small space. Attached Figure Description

[0023] Figure 1 This is an assembly drawing of a multi-functional interface-use repeatable high-load-bearing locking mechanism.

[0024] Figure 2 This is a structural diagram of the active end of a multifunctional interface repeatable high-load-bearing locking mechanism;

[0025] Figure 3 yes Figure 2 Sectional view of AA;

[0026] Figure 4 This is a passive end structure diagram of a multi-functional interface repeatable high-load locking mechanism;

[0027] Figure 5 This is an assembly drawing of a multi-functional interface-use repeatable high-load-bearing locking mechanism in its fully locked state.

[0028] Figure 6 This is the front view of the lock hook;

[0029] Figure 7 This is a side view of the lock hook;

[0030] Figure 8 This is a schematic diagram of the chute.

[0031] In the diagram: 101-Active end, 102-Passive end, 301-Separation spring, 302-First bearing, 303-Planetary reducer, 304-Motor, 401-Main body, 402-Lead screw, 403-Lead nut, 404-Fifth shaft, 405-Sixth shaft, 406-Third tie rod, 407-Second tie rod, 408-Seventh shaft, 409-First tie rod, 410-Small shaft, 411-Spring, 412-Locking hook, 413-Bearing bracket, 414-Positioning nut, 415-Base frame, 416-Upright frame, 417-Stop block, 601-Adapter ring, 602-Disc spring guide rod, 603-Ternary shaft, 604-Disc spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0033] Specific implementation method one: Combining Figure 1-5 This embodiment describes a multifunctional interface repeatable high-load-bearing locking mechanism, comprising an active end 101 and a passive end 102. The active end 101 includes a separation spring 301, a body 401, a third pull rod 406, a second pull rod 407, a first pull rod 409, a small shaft 410, a spring 411, a locking hook 412, and a drive structure. One end of the second pull rod 407 is connected to the body 401, and the other end of the second pull rod 407 is connected to one end of the third pull rod 406 and one end of the first pull rod 409. The other end of the third pull rod 406 is connected to the drive structure. The other end of the first pull rod 409 is connected to one end of the locking hook 412 via the small shaft 410, and the other end of the locking hook 412 is connected to the body 401 via the spring 411. The locking hook 412 engages with the body 401, and the small shaft 410 slides with the body 401. The connection is achieved by a release spring 301 on the body 401, which, along with the locking hook 412, engages with the passive end 102. This invention utilizes a crank-connecting rod mechanism to rationally design and optimize the locking mechanism, achieving a labor-saving effect, improving the load-bearing capacity of the locking mechanism, and ensuring it does not fail during repeated use. Through precise design and optimization, this invention provides reliable connection and fixation functions; it can withstand large loads and maintain a stable connection under harsh environments such as vibration and impact, thereby improving the reliability and safety of the entire system. Compared to traditional welding and bolt fixing methods, this invention allows for easy disassembly and assembly; this is crucial for equipment maintenance, parts replacement, and system upgrades and modifications. The reusability and adjustability of this invention improve maintenance efficiency.

[0034] Specific Implementation Method Two: Combining Figure 1-5 This embodiment describes a multi-functional interface with a repeatable, high-load-bearing locking mechanism. A small shaft 410 is keyed to a locking hook 412 and a first pull rod 409. The body 401 includes a base frame 415 and a vertical frame 416. Figure 3 As shown, two uprights 416 are symmetrically fixed on the base frame 415. Vertical grooves 418 are machined on the uprights 416. The end of the small shaft 410 is disposed in the groove 418, and the small shaft 410 is slidably connected to the machine body 401 through the groove 418 of the upright 416. Figure 3During the downward movement of the locking hook 412, the second pull rod 407 rotates clockwise, and the angle between the second pull rod 407 and the lateral direction gradually decreases. During this process, the second pull rod 407 pushes the lower part of the first pull rod 409 to move to the right, thereby realizing the counterclockwise rotation of the small shaft 410, which in turn drives the locking hook 412 to rotate counterclockwise, so that it can hook the passive end by rotation and also realize the downward force.

[0035] Specific implementation method three: Combining Figure 1-5 This embodiment describes a multifunctional interface with a repeatable, high-load-bearing locking mechanism. A small shaft 410 is rotatably connected to a locking hook 412 and a first pull rod 409. The body 401 includes a base frame 415, a vertical frame 416, and a stop block 417. Figure 3 As shown, two uprights 416 are symmetrically fixed on the base frame 415. Vertical grooves 418 are machined on the uprights 416. A stop block 417 is fixedly installed on the right side of each upright. A locking hook 412 is located between the two uprights 416, to the left of the stop block 417. The right side of the locking hook 412 engages with the left side of the stop block 417. The end of a small shaft 410 is positioned within the groove 418, and the small shaft 410 is slidably connected to the machine body 401 via the groove 418 of the upright 416. A spring... Both ends of 411 are fixedly connected to stop 417 and locking hook 412 respectively. The rear end of the locking hook is connected to a spring. When the spring contracts, it pulls the locking hook backward to swing at a certain angle with the vertical direction, so that the passive end trunnion reaches the capture range. During the downward movement of the locking hook 412, the locking hook 412 contacts the stop 417 and rotates under the action of the stop 417, so that the upper end of the locking hook extends into the connecting hole 605. The locking hook rotates around the small axis to the vertical direction, and the locking hook 412 maintains its posture under the action of the stop 417. Continuing downward movement, the locking hook 412 hooks onto the bottom surface of the connecting hole 605, causing the trunnion 603 to move downward, compressing the disc spring and release spring; as the locking hook moves downward, the crank connecting rod, including the third pull rod 406 and the second pull rod 407 (equivalent to a crank), is designed with two sets of crank connecting rods in parallel. This invention adopts a mechanical crank connecting rod mechanism, by connecting two crank connecting rod mechanisms in parallel (two third pull rods 406 and second pull rods 407 are symmetrically arranged on the first pull rod 409, and two third pull rods 406 are symmetrically arranged on the lead screw 409). The design of the crank dead center position (both sides of 02) and the crank dead center position when fully locked means that at the dead center position, since the relative motion directions of the connecting rod and the crank are parallel or opposite, an effective torque conversion cannot be formed. Therefore, the output force or motion will be very limited or close to zero. This design achieves an innovative configuration of the repeatable high-load locking mechanism, realizing the effect of increasing distance and reducing force in a small space. It is used to bear the large load brought by the compression disc spring. When fully locked, the crank reaches the dead center position, and a very small force can keep the mechanism locked.

[0036] Specific implementation method four: Combination Figure 1-8 This embodiment describes a multifunctional interface with a repeatable, high-load-bearing locking mechanism. A small shaft 410 is rotatably connected to a locking hook 412 and a first pull rod 409. The body 401 includes a base frame 415 and a vertical frame 416. The vertical frame 416 is fixedly mounted on the base frame 415. A groove 418 is machined on the vertical frame 416. The lateral width of the upper opening of the groove 418 is greater than the lateral width of the lower opening, and both lower side walls of the groove are vertically oriented. An attitude-adjusting slider 4121 is fixed to the lower part of the locking hook 412. The attitude-adjusting slider 4121 is a variable-diameter slider, meaning the distance from the edge of the attitude-adjusting slider to its rotation axis is not uniform. Figure 6 As shown, the upper right side of the attitude adjustment slider 4121 has two perpendicular straight lines, while the other sides of the slider 4121 are curved, with the radius of the curve equal to the length of the straight lines. The right side of the straight lines is perpendicular to the upper transverse surface of the locking hook 412. The attitude adjustment slider 4121 is set in the slide groove 418, and the small shaft 410 is set in the slide groove 418 through the first bearing. The small shaft 410 is slidably connected to the machine body 401 through the slide groove 418 of the upright 416. The rotation axis of the small shaft 410 and the attitude adjustment slider 4121 is the same. When not locked, the locking hook 412 and its attitude adjustment slider 4121 are both arranged at an angle under the action of the spring 411. The attitude adjustment slider 4121 is located at the upper opening of the slide groove 418. During the descent of the locking hook, the attitude adjustment slider 4121 deflects due to the action of the slide groove 418, thereby deflecting the locking hook. When the attitude adjustment slider 4121 moves to the lower opening of the slide groove 418, because the lateral distance of the lower opening of the slide groove 418 is approximately equal to the diameter of the arc, the right side of the attitude adjustment slider 4121 is aligned with the lower vertical sidewall of the slide groove. In coordination, the vertical setting of the locking hook is achieved, that is, the attitude adjustment slider 4121 contacts the slide groove 418, and the locking hook rotates and straightens under the action of the slide groove; the locking hook moves downward, and the crank connecting rod includes a third pull rod 406 and a second pull rod 407 (equivalent to a crank). The design of the two sets of crank connecting rods in parallel means that the present invention adopts a mechanical crank connecting rod mechanism, by connecting two crank connecting rod mechanisms in parallel (two third pull rods 406 and second pull rods 407 are symmetrically arranged on the first pull rod 409, and two third pull rods 406 are symmetrically arranged on the lead screw 402). The design incorporates both sides of the crank and the crank dead center position when fully locked. In the dead center position, since the relative motion directions of the connecting rod and the crank are parallel or opposite, an effective torque conversion cannot be formed. Therefore, the output force or motion will be very limited or close to zero. This design achieves an innovative configuration for a repeatable high-load locking mechanism, realizing the effect of increasing distance and reducing force in a small space. It is used to withstand the large load brought by the compression disc spring. When fully locked, the crank reaches the dead center position, and a very small force can keep the mechanism locked.

[0037] Specific Implementation Method Five: Combining Figure 1-5This embodiment describes a multifunctional interface repetitive high-load-bearing locking mechanism. The drive structure includes a planetary reducer 303, a motor 304, a lead screw 402, a lead screw nut 403, a bearing bracket 413, and a positioning nut 414. The motor 304 and bearing bracket 413 are fixedly mounted on the base frame 415 of the machine body 401. The lead screw nut 403 is connected to the bearing bracket 413 and the positioning nut 414, thus securing the lead screw nut 403 to the inner ring of the bearing in the bearing bracket 413. The end of the lead screw nut 403 is connected to the output end of the motor 304 via the planetary reducer 303. One end of the lead screw 402 is threaded, and the other end of the lead screw 402 is connected to the third tie rod 406. The axial direction of the lead screw nut 403 is perpendicular to the direction of the slide groove. The lead screw nut 403 provides power for the lead screw to move along the axial direction of the lead screw nut, and also plays a supporting and guiding role. The lead screw nut includes an internal thread end and a protective end. The lead screw achieves axial movement by engaging with the internal thread of the lead screw nut, and provides space and protection for the movement of the lead screw through the inner cavity of the protective end. The lead screw nut is connected to the output end of the planetary reducer, that is, the output gear of the planetary reducer is fitted on the outer wall of the internal thread end of the lead screw nut. The lead screw nut is set parallel to the motor housing to achieve a reasonable layout.

[0038] Specific Implementation Method Six: Combination Figure 1-5 This embodiment describes a multifunctional interface repeatable high-load-bearing locking mechanism. The active end 101 further includes a first bearing 302, a fifth shaft 404, a sixth shaft 405, and a seventh shaft 408. The middle part of the small shaft 410 is connected to the locking hook and the first pull rod. The inner ring of the first bearing 302 is interference-fitted with both ends of the small shaft 410, and the outer ring of the first bearing 302 is slidably connected to the slide groove 418, allowing the small shaft to move up and down along the slide groove. One end of the second pull rod 407 is connected to the body 401 via the slide groove 408. The sixth shaft 405 on the lower side of 18 is rotatably connected, and the other end of the second pull rod 407 is rotatably connected to one end of the third pull rod 406 and the first pull rod 409 through the seventh shaft 408. The other end of the third pull rod 406 is rotatably connected to the lead screw 402 of the drive structure through the fifth shaft 404. The sixth shaft 405 is located on the upper side of the fifth shaft 404. Through structural design and optimization, the present invention achieves the effect of saving effort, improving the load-bearing capacity, and ensuring that it will not fail during repeated use. The present invention can provide reliable connection and fixing functions.

[0039] Specific implementation method seven: Combining Figure 1-5 This embodiment describes a multifunctional interface with a repeatable high-load-bearing locking mechanism. Four separation springs 301 are symmetrically arranged on both sides of the locking hook 412. The locking hook hooks onto the passive end trunnion, causing the passive end to move downwards, compressing the separation springs, and the locking mechanism begins to lock. This invention can withstand large loads and maintain a stable connection under harsh environments such as vibration and impact, thereby improving the reliability and safety of the entire system.

[0040] Specific implementation method eight: Combination Figure 1-5 This embodiment describes a multifunctional interface with a repeatable high-load-bearing locking mechanism. The passive end 102 includes an adapter ring 601, a trunnion 603, and a disc spring 604. The adapter ring 601 and the trunnion 603 are coaxially arranged. The adapter ring and the trunnion press against the disc spring to generate a large load, ensuring reliable ejection during separation. The trunnion 603 has a connecting hole 605 in its middle. The connecting hole in the middle of the trunnion 603 passes through the central hole of the adapter ring 601 and engages with the other end of the locking hook 412. The lower part of the adapter ring 601 engages with the separation spring 301. The locking hook hooks onto the passive end trunnion, causing the passive end to move downwards, compressing the separation spring, and the locking mechanism begins to lock.

[0041] Specific Implementation Method Nine: Combining Figure 1-5 This embodiment describes a multifunctional interface repetitive high-load-bearing locking mechanism. The passive end 102 further includes a disc spring guide rod 602. The central hole of the adapter ring 601 is a stepped hole. Several circumferentially arranged disc spring guide rods 602 are fixedly arranged on the stepped central hole of the adapter ring 601. The disc spring guide rods 602 are arranged parallel to the central axis of the adapter ring 601. Disc springs 604 are fitted on the disc spring guide rods 602. The disc spring guide rods 602 are slidably connected to the axial hole of the adapter ring 601. The trunnion 603 is a stepped shaft that mates with the central hole of the adapter ring 601, and the trunnion 603 is slidably connected to the adapter ring 601. The two ends of the disc spring 604 are fixedly connected to the trunnion 603 and the adapter ring 601, respectively.

[0042] Specific Implementation Method Ten: Combining Figure 1-5 This embodiment describes a multifunctional interface repeatable high-load-bearing locking mechanism. The active end is fixed to the base plate, and the passive end is moved to the capture range of the active end by a robotic arm and then locked. It has tolerance-based coarse capture and guidance functions, and completes capture and reliable locking with the assistance of the robotic arm. It has active locking drive capability, which can provide docking and locking drive force for the docking and locking of electrical, information, and hydraulic interfaces. To a certain extent, it can decouple the capture, orientation correction and telecommunications interface connection process of the module, and ultimately realize the synchronous locking and connection of mechanical, electrical and information interfaces, with better operability and connection reliability. This invention can be applied to the field of on-orbit assembly technology, adapting to the on-orbit maneuvering overload of modules and meeting the requirements of high load-bearing capacity.

[0043] Example 1:

[0044] This invention optimizes the structure and materials, typically using high-strength steel, titanium alloys, and other materials, resulting in high strength and rigidity while minimizing its own weight. By reducing the weight of this invention, the load capacity and fuel efficiency of the entire system can be improved.

[0045] like Figure 1 As shown, the active end is fixed on the base plate, and the passive end is moved to the capture range of the active end by the robotic arm and then locked.

[0046] like Figure 2 , 3 As shown, this is the active end of the locking mechanism. Motor 304 drives planetary reducer 303, causing lead screw 402 to move to the left along nut 403. At this time, lead screw 402 pulls fifth shaft 404 to the left as well. One end of third tie rod 406 is connected to fifth shaft 404, and the other end is connected to seventh shaft 408. At this time, one end of third tie rod 406 moves horizontally to the left, while the other end rotates around seventh shaft 408, simultaneously pulling seventh shaft 408 downwards around sixth shaft 405 with second tie rod 407 as the radius. One end of second tie rod 407... The sixth shaft 405 is fixed to the frame 401, and the other end of the second pull rod 407 is connected to the seventh shaft 408; one end of the first pull rod 409 is connected to the seventh shaft 408, and the other end is connected to the small shaft 410; the seventh shaft 408 rotates, pulling the first pull rod 409 downward; bearings 302 are installed at both ends of the small shaft, and the first pull rod 409 pulls the small shaft 410 and the bearings 302 downward along the vertical slide groove; the small shaft 410 is connected to the locking hook 412, and the rear end of the locking hook 412 is connected to the spring 411, such as... Figure 3 As shown, when the locking hook 412 is pulled and swung backward, after the locking hook 412 enters the sliding groove connection hole, the lower end of the locking hook enters the vertical sliding groove, causing the locking hook to rotate around the small shaft to the vertical direction. The bottom has an attitude adjustment slider 4121 to make the locking hook 412 swing to the vertical position; the second pull rod rotates to the vertical position, the small shaft 410 is at the bottom of the sliding groove 416, and the entire device is completely locked.

[0047] At this time, as Figure 4 As shown, the locking hook 412 hooks the trunnion 603, and the entire system begins to lock. As the lead screw 401 moves to the left, the driven end 102 moves downward. The assembly ring 601 compresses the release spring 301. When the disc spring 604 begins to compress, the locking mechanism bears a large load. However, since the crank connecting rod mechanism reaches the dead point, the motor 304 only needs a small input to maintain the locking. The entire mechanism has the effect of increasing pitch and reducing force. The unlocking process is the opposite of the above process.

[0048] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multifunctional interface with repeatable high load-bearing locking mechanism, characterized in that: The device includes an active end (101) and a passive end (102). The active end (101) includes a separation spring (301), a body (401), a third pull rod (406), a second pull rod (407), a first pull rod (409), a small shaft (410), a spring (411), a locking hook (412), and a drive structure. One end of the second pull rod (407) is connected to the body (401), and the other end of the second pull rod (407) is connected to one end of the third pull rod (406) and the first pull rod (409). The other end of 406 is connected to the drive structure. The other end of the first pull rod (409) is connected to one end of the locking hook (412) through the small shaft (410). The other end of the locking hook (412) is connected to the body (401) through the spring (411). The locking hook (412) and the body (401) are engaged. The small shaft (410) and the body (401) are slidably connected. A separation spring (301) is provided on the body (401). The separation spring (301), the locking hook (412) and the passive end (102) are engaged. The machine body (401) includes a base frame (415) and a vertical frame (416). The vertical frame (416) is fixedly mounted on the base frame (415). A vertical groove (418) is machined on the vertical frame (416). A small shaft (410) is mounted in the groove (418), and the small shaft (410) is slidably connected to the machine body (401) through the groove (418) of the vertical frame (416). The drive structure includes a planetary reducer (303), a motor (304), a lead screw (402), a lead screw nut (403), a bearing bracket (413), and a positioning nut (414). The motor (304) and the bearing bracket (413) are mounted on the machine body (401). The lead screw nut (403) is connected to the bearing bracket (413) and the positioning nut (414). The end of the lead screw nut (403) is connected to the output end of the motor (304) through the planetary reducer (303). The lead screw nut (403) is threaded to one end of the lead screw (402), and the other end of the lead screw (402) is connected to the third tie rod (406). The active end (101) also includes a first bearing (302), a fifth shaft (404), a sixth shaft (405) and a seventh shaft (408). The small shaft (410) is connected to the body (401) through the first bearing (302). One end of the second pull rod (407) is rotatably connected to the body (401) through the sixth shaft (405). The other end of the second pull rod (407) is rotatably connected to one end of the third pull rod (406) and the first pull rod (409) through the seventh shaft (408). The other end of the third pull rod (406) is rotatably connected to the lead screw (402) of the drive structure through the fifth shaft (404).

2. The multifunctional interface repeatable high-load-bearing locking mechanism according to claim 1, characterized in that: There are four release springs (301), which are symmetrically arranged on both sides of the lock hook (412).

3. A repeatable high-load-bearing locking mechanism for a multifunctional interface according to claim 1 or 2, characterized in that: The passive end (102) includes a coupling ring (601), a trunnion (603) and a disc spring (604). The coupling ring (601) is coaxially arranged with the trunnion (603), and a disc spring (604) is provided between the coupling ring (601) and the trunnion (603). The trunnion (603) has a connecting hole (605) in the middle. The connecting hole in the middle of the trunnion (603) is engaged with the other end of the locking hook (412). The coupling ring (601) is engaged with the release spring (301).

4. The multifunctional interface repeatable high-load-bearing locking mechanism according to claim 3, characterized in that: The passive end (102) also includes a disc spring guide rod (602). The adapter ring (601) is provided with a plurality of circumferentially arranged disc spring guide rods (602). Disc springs (604) are fitted on the disc spring guide rods (602). The disc spring guide rods (602) are connected to the adapter ring (601).

5. A repeatable high-load-bearing locking mechanism for a multifunctional interface according to claim 4, characterized in that: The active end is fixed to the base plate, and the passive end is moved to the capture range of the active end by a robotic arm and then locked.

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