A low-impact self-locking spatial hinge mechanism

Abstract

This invention discloses a low-impact self-locking space hinge mechanism, relating to the field of aerospace technology. The key technical features are: an upper hinge, a lower hinge, and a rotary liquid damper. Two rotating arms are arranged on the sidewall of the upper hinge, with a central shaft running through the interior of each arm. An adjustment disc is located at one end of the central shaft, and a torsion spring is sleeved on the central shaft. One end of the torsion spring is located inside the rotating arm, and the other end is located inside the adjustment disc. A coupling is located at the other end of the central shaft, connecting the central shaft to the output end of the rotary liquid damper. This invention's low-impact self-locking space hinge mechanism features self-drive, self-locking, low impact, small size, no energy consumption, and high reliability with no leakage in orbit. It addresses the problems in existing technologies where the deployment mechanism undergoes variable acceleration motion during deployment, resulting in high deployment speed and large impact upon reaching the target position.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and more specifically, to a low-impact self-locking space hinge mechanism. Background Technology

[0002] With the continuous advancement of aerospace technology, spacecraft missions in orbit are becoming increasingly complex and their functions are becoming more diverse. To meet these needs, space deployment mechanisms have been widely used on spacecraft. For example, solar cell arrays, antennas, and scientific instruments all need to be deployed in orbit through deployment mechanisms to save space and weight during launch. One of the key components of a space deployment mechanism is the space hinge mechanism, which plays a role in connecting and transmitting motion and is the hub in the deployment process.

[0003] Spatial hinge mechanisms not only need to possess the basic functions of a connecting structure, but also need to achieve multiple functions such as driving and self-locking. These functions are crucial for the smooth deployment and stable positioning of the unfolding mechanism. Currently, commonly used passive mechanical spatial hinge mechanisms mainly employ spiral springs and torsion springs as driving elements. During the unfolding process, the energy stored in these springs is gradually released, driving the unfolding mechanism to unfold. However, due to the characteristics of spring-driven mechanisms, the unfolding mechanism often exhibits variable acceleration motion during the unfolding process. This nonlinear motion mode makes it difficult to control the unfolding speed, easily leading to problems such as excessive speed and large impact upon reaching the target position.

[0004] Excessive deployment speed and impact upon deployment can adversely affect the spacecraft's attitude and orbital control. Specifically, rapid deployment of the deployment mechanism may cause changes in the spacecraft's attitude, requiring additional adjustments to the attitude control system, increasing system complexity and energy consumption. Furthermore, a large impact upon deployment may generate significant mechanical stress on the connection points of the deployment mechanism, affecting its service life and reliability.

[0005] To address the aforementioned issues, the design of the space hinge mechanism needs optimization. Specific optimization directions include: improving the design of the drive components to achieve a smoother deployment process; introducing shock absorption and buffering devices to reduce impact during deployment; and developing novel self-locking mechanisms to ensure stability after deployment. Furthermore, the application of intelligent control technologies and new materials is expected to improve the performance of space hinge mechanisms in the future, meeting the needs of space deployment mechanism technology development. Summary of the Invention

[0006] The purpose of this invention is to provide a low-impact self-locking spatial hinge mechanism that integrates self-drive, self-locking, low impact, small size, no energy consumption, and high reliability with no leakage in orbit, in order to solve the problems in the prior art where the deployment mechanism performs variable acceleration motion during the deployment process, resulting in fast deployment speed and large impact upon reaching the target position.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a low-impact self-locking spatial hinge mechanism, comprising an upper hinge, a lower hinge, and a rotary liquid damper. Two rotating arms are provided on the sidewall of the upper hinge. A central shaft is disposed through the interior of the two rotating arms. An adjusting disc is provided at one end of the central shaft. A torsion spring is sleeved on the central shaft. One end of the torsion spring is located inside the rotating arm, and the other end of the torsion spring is located inside the adjusting disc. A coupling is provided at the other end of the central shaft, connecting the central shaft to the output end of the rotary liquid damper. A central shaft screw is provided at the bottom of the lower hinge, and the central shaft is fixedly mounted on the lower hinge by the central shaft screw.

[0008] By adopting the above technical solution, when the upper hinge begins to unfold, the central shaft drives the two rotating arms to rotate, the torsion spring is stretched and stores energy, and the elastic restoring force of the torsion spring is gradually released. This process can slow down the rotation speed of the central shaft and avoid the impact caused by instantaneous acceleration. The rotary liquid damper is connected to the central shaft and controls the rotation speed through the viscosity of the damping fluid. During the unfolding process, the rotary liquid damper provides damping force, so that the upper hinge unfolds at a constant and controlled speed, further reducing the impact force.

[0009] When the upper hinge is fully extended, the coupling design ensures that the central shaft stops rotating. The damping force of the rotary liquid damper keeps the hinge stationary in the extended position, preventing rebound. The self-locking function ensures the stability and safety of the structure, making it particularly suitable for applications that require maintaining the extended state for extended periods. The adjustment disc allows users to adjust the preload of the torsion spring according to actual needs, thereby adjusting the damping and elastic recovery characteristics of the entire hinge mechanism. Users can set an appropriate torsion spring preload through the adjustment disc according to different application scenarios to ensure smoothness during the extension process and stability after the hinge is fully extended.

[0010] The combination of the torsion spring and the rotary liquid damper in this invention effectively reduces the impact of instantaneous acceleration during deployment and upon reaching the final position. This design is particularly suitable for equipment requiring smooth deployment, such as satellite solar panels and foldable antennas. The design of the coupling and rotary liquid damper in this invention ensures the self-locking of the hinge after deployment, preventing the mechanical structure from rebounding and becoming unstable. The self-locking function increases the reliability and safety of the system. The adjustment disc in this invention provides flexible adjustment means, allowing users to adjust the preload of the torsion spring according to actual needs to adapt to different working environments and requirements. This adjustability makes the hinge mechanism widely applicable and able to meet various technical requirements. The lower hinge is fixed by a central shaft screw, ensuring high stability of the entire hinge mechanism during operation. The design of the central shaft ensures effective linkage between the torsion spring and the rotary liquid damper, guaranteeing the coordinated operation of the entire system.

[0011] The invention is further configured such that: a sliding groove is provided inside the rotating arm; a compression spring is provided on the side wall of the upper hinge; a sliding rod is provided at the end of the compression spring away from the upper hinge; sliding pins are provided on both sides of the sliding rod; the sliding pins are located inside the sliding groove; and the sliding rod moves along the sliding groove via the sliding pins.

[0012] By adopting the above technical solution, the sliding groove is set inside the rotating arm to provide the movement path of the sliding rod. The sliding rod has a sliding pin at its end, which is embedded in the sliding groove to ensure that the sliding rod can move smoothly along the sliding groove. One end of the compression spring is fixed to the side wall of the upper hinge, and the other end is connected to the sliding rod. When the upper hinge is unfolded, the compression spring is compressed and stores elastic potential energy. During the unfolding process of the upper hinge, the sliding rod moves along the sliding groove through the sliding pin, and the compression spring is gradually compressed. When it is unfolded to a certain position, the reaction force of the compression spring produces a damping effect on the rotating arm through the sliding rod and the sliding pin.

[0013] The sliding groove and sliding rod of this invention enable the compression spring to play a more effective buffering role during the hinge unfolding process. This buffering effect, combined with the damping effect of the torsion spring and the rotary liquid damper, significantly reduces the impact force generated during unfolding. The design of the sliding pin moving along the sliding groove ensures the smooth operation of the sliding rod, avoiding vibration and swaying during the hinge unfolding process. The reaction force of the compression spring provides additional damping, further enhancing the stability of the hinge mechanism. The compression spring not only provides a buffering effect during unfolding, but also achieves self-locking through the reaction force when the hinge is in place. This dual protection mechanism ensures the stability and reliability of the hinge after it is unfolded into place.

[0014] The present invention is further configured such that: the adjustment plate is provided with adjustment plate screws for fixing the adjustment plate, the central shaft is provided with uniformly distributed bosses on the surface near the adjustment plate, and the adjustment plate is also provided with corresponding grooves.

[0015] By adopting the above technical solution, the adjustment disc of the present invention is fixed to the central shaft by the adjustment disc screw. The user can adjust the preload of the torsion spring by rotating the adjustment disc and fixing it with the screw, thereby adjusting the elastic recovery characteristics of the entire hinge mechanism. The central shaft has evenly distributed bosses on the surface near the adjustment disc, and the adjustment disc also has corresponding grooves. The combination of bosses and grooves ensures that the adjustment disc can be accurately positioned when fixed and will not loosen due to vibration or other external forces during use. When the user adjusts the adjustment disc, the engagement of the bosses and grooves provides stable positioning and ensures that the adjusted state can be stably maintained, thus improving the accuracy and reliability of the torsion spring preload adjustment.

[0016] This invention, through the design of the adjusting screw and the boss and groove, allows users to precisely adjust the preload of the torsion spring to meet the needs of different application scenarios. The high-precision adjustment function enables the hinge mechanism to better adapt to various complex usage environments. By precisely adjusting the preload of the torsion spring, this invention ensures better self-locking performance of the hinge after it is fully extended, preventing rebound. The improved self-locking performance makes the hinge mechanism safer and more reliable in practical applications. Furthermore, by precisely adjusting the preload of the torsion spring, this invention optimizes the shock absorption and buffering effect during the hinge's extension process, further reducing the impact force during extension. This makes the hinge mechanism more stable during extension, reducing impact and wear on other components.

[0017] The present invention is further configured such that: a damper bracket is provided on the top surface of the lower hinge, and the rotary liquid damper is mounted on the lower hinge through the damper bracket.

[0018] By adopting the above technical solution, the damper bracket of the present invention provides a stable support platform for the rotary liquid damper, which is not prone to shaking or falling off during high-speed rotation and movement. The stable support platform ensures the normal operation of the liquid damper, improves the stability of the hinge mechanism, and through the cooperation between the damper bracket and the rotary liquid damper, the rotational speed of the hinge during the unfolding process is effectively controlled, avoiding the impact problem caused by rapid unfolding. The rotary liquid damper is firmly installed on the damper bracket, which can provide a stable damping effect, ensuring the smooth operation of the hinge and its stability after positioning. The damper bracket organically combines the rotary liquid damper and the hinge mechanism, providing a more coordinated operation mode for the unfolding and retraction of the entire hinge mechanism. The optimized mechanism cooperation improves the working efficiency and performance of the hinge and extends the service life of the equipment.

[0019] The present invention is further configured such that: the rotary liquid damper includes inner and outer cylinders, an inner shell is provided at the opening of the outer cylinder, an outer rotating shaft is provided inside the inner shell, a centripetal shaft is provided on the side of the outer rotating shaft away from the outer retaining ring, a centripetal shaft sleeve is provided at the output end of the centripetal shaft, an inner rotating shaft is provided connected to the outer rotating shaft through the centripetal shaft and the centripetal shaft sleeve, an impeller is provided at the output end of the inner rotating shaft, the impeller is provided between the outer cylinder and the inner cylinder, and damping fluid is filled between the inner cylinder and the outer cylinder.

[0020] By adopting the above technical solution, the present invention can provide stable and continuous damping force by using damping fluid, significantly slowing down the rotation speed and reducing impact and vibration. This ensures the smooth operation of the hinge during opening and closing, improves service life and reliability. The overall structure of the rotary liquid damper is compact and occupies little space, making it suitable for applications with limited space. The compact design not only saves space but also simplifies the installation and maintenance process. The design between the inner and outer cylinders ensures the sealing of the damping fluid, avoids liquid leakage, and ensures the long-term effective operation of the damper. The excellent sealing performance improves the durability and reliability of the damper.

[0021] This invention enables precise control of the damping effect through a centripetal shaft, centripetal shaft sleeve, and impeller, meeting various application requirements. This precise control allows the rotary liquid damper to exhibit excellent performance under various complex conditions. The damping fluid effectively reduces friction noise when the impeller rotates, providing a quieter working environment. The low-noise characteristics make this damper suitable for noise-sensitive locations. The inner and outer cylinders and their tight fit design enhance the durability of the overall structure, enabling stable operation for extended periods without frequent replacements. The use of damping fluid also reduces mechanical wear, further extending the equipment's service life.

[0022] The present invention is further configured such that: a radial bearing is sleeved in the middle of the radial shaft, the radial bearing is disposed inside the inner cylinder, an outer retaining ring is disposed on the outer surface of the inner shell, and an inner retaining ring is disposed on the side of the inner rotating shaft near the impeller.

[0023] By adopting the above technical solutions, the outer and inner retaining rings of this invention effectively enhance the stability of the overall structure. Especially under high-speed rotation and heavy load conditions, they can effectively reduce the risk of vibration and structural failure. The precise positioning of the outer and inner retaining rings ensures the safe operation of the impeller and the inner rotating shaft, providing precise motion control and predictive maintenance. The use of radial bearings in this invention improves the rotational efficiency of the radial shaft, reduces energy loss and mechanical wear, and extends the service life of the liquid rotary damper. The above solutions not only improve the durability of the overall system, but also increase the reliability and stability of the rotary liquid damper in long-term use, reducing the frequency and cost of maintenance and replacement.

[0024] The present invention is further configured such that: a bellows is provided between the radial bushing and the inner housing, and the two ends of the bellows are respectively welded to the sides of the radial bushing and the inner housing.

[0025] By adopting the above technical solution, the bellows of the present invention, as a flexible connecting element, can withstand certain pressure and vibration during the operation of the rotary liquid damper, ensuring the flexibility between connecting parts, effectively reducing wear and damage caused by stress concentration. The welded connection of the bellows ensures that the internal liquid will not leak, improving the sealing and stability of the rotary liquid damper, preventing liquid leakage or gas ingress, and ensuring the normal operation of the rotary liquid damper. The present invention provides additional structural support through the bellows, enhancing the connection stability of the radial bushing and the inner shell, and reducing the risk of loosening or damage caused by vibration and external forces.

[0026] The present invention is further configured such that: a lubricating pad is provided between the rotating arm and the lower hinge, and the lubricating pad is a PEEK material with self-lubricating properties.

[0027] By adopting the above technical solution, the present invention mainly reduces friction and wear by setting a lubricating pad between the rotating arm and the lower hinge, thereby ensuring the smooth operation of mechanical parts. The use of PEEK material with self-lubricating properties helps to form a stable lubricating film on the friction surface, reducing energy loss and material wear. PEEK (polyether ether ketone) material has excellent wear resistance and chemical stability, and can maintain stability over a wide operating temperature range. Its self-lubricating properties mean that the need for conventional lubricants is reduced on the contact surface, while improving the service life and reliability of the parts.

[0028] In summary, the present invention has the following beneficial effects:

[0029] 1. This invention effectively reduces the impact during deployment by combining a torsion spring and a rotary liquid damper, making it particularly suitable for equipment requiring smooth deployment, such as satellite solar panels and foldable antennas. The coupling and rotary liquid damper used in this invention ensure that the hinge self-locks after deployment, preventing the mechanical structure from springing back and becoming unstable, thus enhancing the reliability and safety of the system. It provides a low-impact self-locking spatial hinge mechanism that integrates self-drive, self-locking, low impact, small size, no energy consumption, and high reliability with no leakage in orbit.

[0030] 2. This invention allows users to flexibly adjust the preload of the torsion spring via an adjustment disc to adapt to different working environments and requirements, providing wide applicability. The lower hinge of this invention is fixed by a central shaft screw, ensuring high stability of the entire hinge mechanism during operation. The design of the central shaft ensures effective linkage between the torsion spring and the rotary liquid damper, guaranteeing coordinated operation of the system. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall exploded structure in an embodiment of the present invention;

[0033] Figure 3 This is a side view of the rotary liquid damper in an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the exploded structure of the rotary liquid damper in an embodiment of the present invention.

[0035] In the diagram: 1. Upper hinge; 2. Compression spring; 3. Sliding rod; 4. Sliding pin; 5. Damper bracket; 6. Rotary liquid damper; 601. Outer retaining ring; 602. Outer rotating shaft; 603. Radial shaft; 604. Radial bearing; 605. Outer cylinder; 606. Impeller; 607. Inner retaining ring; 608. Inner rotating shaft; 609. Radial bushing; 610. Bellows; 611. Inner cylinder; 612. Damping fluid; 613. Inner shell; 7. Limit pin; 8. Coupling; 9. Lubricating gasket; 10. Lower hinge; 11. Central shaft screw; 12. Central shaft; 13. Adjusting disc; 14. Adjusting disc screw; 15. Torsion spring; 16. Rotating arm. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0037] Example: A low-impact self-locking spatial hinge mechanism, as shown in the attached figure. Figure 1-4As shown, it includes an upper hinge 1, a lower hinge 10, and a rotary liquid damper 6. Two rotating arms 16 are installed on the side wall of the upper hinge 1. A central shaft 12 is installed through the interior of these rotating arms 16. An adjusting plate 13 is installed at one end of the central shaft 12. An adjusting plate screw 14 for fixing the adjusting plate 13 is installed on the adjusting plate 13. The central shaft 12 has evenly distributed bosses on the surface near the adjusting plate 13. The adjusting plate 13 also has corresponding grooves. The bosses are embedded in the grooves to ensure a stable connection between the adjusting plate 13 and the central shaft 12.

[0038] A torsion spring 15 is sleeved on the central shaft 12. One end of the torsion spring 15 is installed inside the rotating arm 16, and the other end is installed inside the adjusting plate 13. There is a sliding groove inside the rotating arm 16. A compression spring 2 is also installed on the side wall of the upper hinge 1. The end of the compression spring 2 away from the upper hinge 1 is connected to the sliding rod 3. Sliding pins 4 are installed on both sides of the sliding rod 3. The sliding pins 4 are installed inside the sliding groove.

[0039] A coupling 8 is installed at the other end of the central shaft 12. The coupling 8 connects the central shaft 12 to the output end of the rotary liquid damper 6. A central shaft screw 11 is installed at the bottom of the lower hinge 10. The central shaft 12 is fixedly installed on the lower hinge 10 by the central shaft screw 11. A lubricating pad 9 is installed between the rotating arm 16 and the lower hinge 10. In this embodiment, the lubricating pad 9 is made of PEEK material with self-lubricating properties.

[0040] The damper bracket 5 is mounted on the lower hinge 10. The rotary liquid damper 6 is fixed by the damper bracket 5. The rotary liquid damper 6 includes inner and outer cylinders. An inner shell 613 is installed at the opening of the outer cylinder 605. An outer rotating shaft 602 is installed inside the inner shell 613. A radial shaft 603 is installed at the end of the outer rotating shaft 602 away from the outer retaining ring 601. The output end of the radial shaft 603 is connected to the radial shaft 603 sleeve. The outer rotating shaft 602 is connected to the inner rotating shaft 608 through the radial shaft 603 and the radial shaft 603 sleeve. An impeller 606 is installed at the output end of 08. The impeller 606 is installed between the inner and outer cylinders. The space between the cylinders is filled with damping fluid 612. A radial shaft 603 bearing is installed in the middle of the radial shaft 603. The radial shaft 603 bearing is installed inside the inner cylinder 611. An outer retaining ring 601 is installed on the outside of the inner shell 613. An inner retaining ring 607 is installed on the side of the inner rotating shaft 608 near the impeller 606. A bellows 610 is installed between the radial shaft 603 sleeve and the inner shell 613. The two ends are welded to the sides of the radial shaft 603 sleeve and the inner shell 613, respectively.

[0041] Working principle: When an external force is applied to the upper hinge, the upper hinge rotates around the central axis. Two rotating arms are connected to the side wall of the upper hinge and drive the central axis to rotate synchronously through the internal central axis. One end of the central axis is connected to the output end of the rotary liquid damper through a coupling. The function of the coupling is to transmit the rotational motion of the central axis to the liquid damper, which contains inner and outer cylinders. An inner shell is installed at the opening of the outer cylinder. Inside the inner shell is an outer rotating shaft, which connects to a radial shaft. The radial shaft then connects to an inner rotating shaft. An impeller is installed at the output end of the inner rotating shaft, positioned between the inner and outer cylinders. Damping fluid fills the space between the inner and outer cylinders. The inner rotating shaft of the liquid damper is supported by a radial bearing installed inside the inner cylinder, providing stable support and ensuring smooth rotation. When the central shaft rotates, the inner rotating shaft drives the impeller to rotate. The impeller, through the damping fluid, generates a damping effect, controlling the hinge's rotational speed and reducing impact during opening and closing. A bellows is installed between the radial shaft sleeve and the inner shell, with its two ends welded to the sides of the radial shaft sleeve and the inner shell, respectively. The bellows provides a seal, preventing damping fluid leakage and ensuring the continuity of the damping effect within the damper.

[0042] A torsion spring is fitted onto the central shaft. One end of the torsion spring is fixed inside the rotating arm, and the other end is fixed inside the adjusting disc. When the upper hinge rotates, the torsion spring is tightened, storing energy. When the external force is removed, the torsion spring releases the stored energy, driving the upper hinge back to its initial position. This process serves as an automatic reset, ensuring the hinge returns to its starting position. A compression spring is installed on the side wall of the upper hinge. The end of the compression spring away from the upper hinge is connected to a sliding rod. Sliding pins are installed on both sides of the sliding rod, and the sliding pins are installed in sliding grooves inside the rotating arm. When the upper hinge rotates, the sliding rod moves along the sliding pins in the sliding groove, compressing the compression spring and storing energy. When the upper hinge returns to its initial position, the compression spring releases the stored energy, pushing the sliding rod back to its original position. The return action of the sliding rod assists in the hinge's reset, making it more stable and accurate. A PEEK lubricating gasket is installed between the rotating arm and the lower hinge. PEEK material has self-lubricating properties, reducing friction between the rotating arm and the lower hinge, extending the service life of the hinge mechanism, and ensuring smooth hinge operation. The boss and groove design between the central shaft and the adjusting plate ensures a stable connection between the two. The boss embedded in the groove prevents the central shaft from rotating off-center, ensuring the accuracy and stability of the hinge rotation.

[0043] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A low-impact self-locking spatial hinge mechanism, characterized in that: The device includes an upper hinge (1), a lower hinge (10), and a rotary liquid damper (6). The upper hinge (1) has two rotating arms (16) on its sidewall. A central shaft (12) runs through the interior of each of the two rotating arms (16). An adjusting disc (13) is located at one end of the central shaft (12). A torsion spring (15) is sleeved on the central shaft (12), with one end of the torsion spring (15) located inside the rotating arm (16) and the other end located inside the adjusting disc (13). A coupling (8) is located at the other end of the central shaft (12), connecting the central shaft (12) to the output end of the rotary liquid damper (6). A central shaft screw (11) is located at the bottom of the lower hinge (10), and the central shaft (12) is fixed by the central shaft screw (11). The rotary liquid damper (6) is mounted on the lower hinge (10). It comprises inner and outer cylinders. An inner shell (613) is provided at the opening of the outer cylinder (605). An outer rotating shaft (602) is provided inside the inner shell (613). A radial shaft (603) is provided on the side of the outer rotating shaft (602) away from the outer retaining ring (601). A radial shaft (603) sleeve is provided at the output end of the radial shaft (603). The outer rotating shaft (602) is connected to the inner rotating shaft (608) via the centripetal shaft (603) and the centripetal shaft (603). An impeller (606) is provided at the output end of the inner rotating shaft (608). The impeller (606) is located between the outer cylinder (605) and the inner cylinder (611). Damping fluid (612) is filled between the inner cylinder (611) and the outer cylinder (605).

2. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: The rotating arm (16) has a sliding groove inside. The side wall of the upper hinge (1) is also provided with a compression spring (2). The end of the compression spring (2) away from the upper hinge (1) is provided with a sliding rod (3). Both sides of the sliding rod (3) are provided with sliding pins (4). The sliding pins (4) are located inside the sliding groove. The sliding rod (3) moves along the sliding groove through the sliding pins (4).

3. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: The adjustment plate (13) is provided with adjustment plate screws (14) for fixing the adjustment plate (13), and the central shaft (12) is provided with evenly distributed bosses on the surface near the adjustment plate (13), and the adjustment plate (13) is also provided with corresponding grooves.

4. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: The top surface of the lower hinge (10) is provided with a damper bracket (5), and the rotary liquid damper (6) is mounted on the lower hinge (10) through the damper bracket (5).

5. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: A radial shaft (603) bearing is sleeved in the middle of the radial shaft (603), and the radial shaft (603) bearing is disposed inside the inner cylinder (611). An outer retaining ring (601) is disposed on the outer surface of the inner shell (613), and an inner retaining ring (607) is disposed on the side of the inner rotating shaft (608) near the impeller (606).

6. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: A bellows (610) is provided between the centripetal shaft (603) sleeve and the inner shell (613), and the two ends of the bellows (610) are respectively welded to the sides of the centripetal shaft (603) sleeve and the inner shell (613).

7. The low-impact self-locking spatial hinge mechanism according to claim 1, characterized in that: A lubricating pad (9) is provided between the rotating arm (16) and the lower hinge (10), and the lubricating pad (9) is a PEEK material with self-lubricating properties.

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