A viscous damper assembly capable of rotating out of plane

Abstract

The present invention relates to a viscous damper assembly device capable of rotating out of a plane, comprising a left damper (1), a right damper (2) and a connecting device; the connecting device comprises a rotation-stopping mechanism (4), a locking mechanism (5) and a pin (3), wherein the rotation-stopping mechanism (4) controls the relative rotation between the connecting ends of the two dampers, and the locking mechanism (5) maintains the rotation state between the connecting ends of the two dampers; the left damper (1) and the right damper (2) are connected in a superimposed manner via the pin (3), and the superimposed surface is perpendicular to a wall or a column. Compared with the prior art, the present invention has the technical advantages of being rotatable, repositionable, highly adaptable and durable, and is of great significance in solving technical problems such as excessive piston stroke and cylinder damage caused by out-of-plane deformation of viscous dampers in high-intensity earthquake zones under strong earthquakes or in wind-sensitive structures under strong winds.

Description

Technical Field

[0001] The present invention relates to the field of engineering technology, and in particular to a viscous damper assembly device capable of rotating out of a plane. Background Art

[0002] Viscous dampers are a common and well-established device for energy dissipation and vibration reduction in buildings. Their basic principle is to dissipate kinetic energy by converting it into the internal energy of the damping medium through the movement of the piston rod within the damping medium, thereby reducing the energy transmitted from the ground to the building structure, thereby controlling the maximum possible displacement of the structure and mitigating structural vibration. Viscous dampers are velocity-type dampers. Due to their low cost, effective vibration reduction, wide range of applications, small footprint, and low temperature sensitivity, they have become one of the most common energy dissipation and vibration reduction measures in structural vibration control. They are not only used to provide earthquake and wind resistance for new structures, but are also widely used in the seismic reinforcement and post-earthquake repair of existing structures.

[0003] Initially, viscous dampers were primarily used in military and mechanical applications. Since their introduction into civil engineering in the 1990s, they have garnered widespread attention due to their excellent performance. Despite their widespread use, viscous dampers still present numerous challenges. For example, they require high internal sealing, which can lead to leakage over extended periods of use. Furthermore, for certain bridges or specialized building structures requiring a large stroke, directly using a viscous damper can exceed their load capacity, potentially causing damage.

[0004] Furthermore, the out-of-plane deformation of viscous dampers caused by torsion of the main structure during strong earthquakes also requires attention. In the Luding County, Sichuan Province, earthquake on September 5, 2022, some seismic isolation devices were damaged, manifested by buckling of the viscous damper piston rods or pullout of the connection nodes. Furthermore, in the Great East Japan Earthquake on March 11, 2011, viscous dampers exceeded their operating stroke under the impact of the earthquake, undergoing plastic deformation and ultimately leading to damper failure. Viscous damper failure may affect the connection with structural components and reduce the bearing capacity of the main structure. Therefore, more in-depth and systematic research on the performance of viscous dampers is necessary to minimize degradation and performance problems during use.

[0005] Patent CN202010829366.5 discloses a viscous damper, comprising: a sealed shell filled with a damping medium; a sleeve connected to one end of the shell; and an axially movable member that passes through the shell in an axially sealed manner, wherein the first end of the axially movable member extends out of the shell for connecting to a vibration source. The second end of the axially movable member extends into the sleeve and is connected to a transmission rod, on which at least one rubber bearing is fixed. However, the patent only considers the problem of stiffness along the axial direction of the transmission rod, that is, horizontal stiffness, so that it can be used at low speeds without overstroke damage. The stiffness out of the plane is not considered. When an actual structure encounters an earthquake or wind load, the structure often undergoes displacement and deformation in two directions. At this time, the out-of-plane deformation may also occur to a certain extent, causing damage to the damper structure. However, the patent does not give sufficient consideration to this form of damage.

[0006] In summary, traditional viscous dampers have problems such as poor out-of-plane deformation performance, easy damage and plastic deformation caused by torsion of the main structure under strong earthquakes or strong winds, so it is necessary to develop a new viscous damper device that can rotate out of the plane. Summary of the Invention

[0007] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a viscous damper assembly device that can rotate out of plane and easily reset.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A viscous damper assembly capable of out-of-plane rotation comprises a left damper, a right damper and a connecting device; the connecting device comprises a rotation-stopping mechanism, a locking mechanism and a pin, wherein the rotation-stopping mechanism controls the relative rotation between the two damper connecting ends, and the locking mechanism maintains the rotational state between the two damper connecting ends; the left damper and the right damper are connected in an overlapping manner via a pin, and the overlapping surface is perpendicular to a wall or a column.

[0010] Furthermore, the left damper comprises a front earring a, a piston rod a, a sealing cover a, a damping medium a, a medium hole a, a piston head a, a sealing cover b, a steel cylinder a, a rear earring a, and a cavity a;

[0011] The right damper includes a front earring b, a piston rod b, a sealing cover c, a damping medium b, a medium hole b, a sealing cover d, a piston head b, a steel cylinder b, a rear earring b, and a cavity b;

[0012] The front earring a is connected to the piston rod a, and the rear earring a is connected to the steel cylinder a body; the front earring b is connected to the piston rod b, and the rear earring b is connected to the steel cylinder b body; the rear earring a is provided with a notch groove; the rear earring a is arranged above the rear earring b, and the two are overlapped and connected by a pin shaft.

[0013] Furthermore, the anti-rotation mechanism includes a limiting column, a limiting hole, an anti-rotation groove, a lever a, a column a, an anti-rotation rod, a through hole c, a column b, a compression spring a, a compression spring b, and a through hole d. The limiting column is fixed on one side of the through hole b of the back earring b, the limiting hole is arranged on the side of the through hole a of the back earring a corresponding to the limiting column, and the anti-rotation groove is arranged on the right side of the through hole a of the back earring a; the anti-rotation rod is provided with a through hole c and a column b fixed on the anti-rotation rod; the two sides of the compression spring a and the compression spring b are respectively welded to the steel cylinder b and the anti-rotation rod.

[0014] Furthermore, the locking mechanism includes: a lock tongue, a lock tongue circular plate, a U-shaped connecting rod, a spring, and a slide groove; the lock tongue is located on the rear earring b, and a lock tongue circular plate is provided below the lock tongue; the U-shaped connecting rod is connected to the lock tongue circular plate, and the U-shaped connecting rod is connected to the slide groove on the steel cylinder b through the shift rod b.

[0015] Furthermore, the viscous damper assembly device has two motion states: when in normal use, the anti-rotation mechanism works normally, and the anti-rotation rod on the surface of the rear earring b is stuck in the groove of the rear earring a under the action of the spring, so that the rear earring a and the rear earring b will not rotate relative to each other around the pin shaft; when in the contact constraint state, the lever a above the rear earring a pushes the anti-rotation rod out of the groove, causing the anti-rotation mechanism to stop working, and the anti-rotation rod rotates around the axis, and finally rotates to trigger the locking mechanism. At this time, the lock tongue is located at the through hole c of the anti-rotation rod, preventing the anti-rotation rod from rotating, so that the upper rear earring b can rotate freely around the pin shaft to adapt to the out-of-plane movement that may be caused by the torsion of the main structure.

[0016] Furthermore, the lock tongue in the locking mechanism is embedded in the ear plate of the rear earring b, and the lower lock tongue circular plate is used to limit the maximum upward stroke of the lock tongue. A blind hole is provided in the rear earring b to facilitate the placement of the limiting circular plate, and a square through hole d is provided to place the lock tongue.

[0017] Furthermore, the anti-rotation rod rotates around the column a.

[0018] Furthermore, the locking mechanism releases the lock by moving the lock tongue connecting rod, so that the anti-rotation rod returns to its position, thereby returning to a normal use state.

[0019] Furthermore, the anti-rotation groove surface and the anti-rotation rod side in the anti-rotation mechanism are mechanically treated by sandblasting to increase the friction coefficient of the contact surface, so that the rear earring a and the rear earring b will not rotate relative to each other around the pin shaft, ensuring the force stability of the two-force rod system in the plane.

[0020] Furthermore, the width of the sliding groove in the locking mechanism is greater than the diameter of the spring, so as to fix the position of the spring.

[0021] The present invention transforms the earring so that it can rotate out of the plane, and adds a rotation-stopping mechanism and a locking mechanism. The rotation-stopping mechanism enables the connecting shaft to maintain a locked state when the lateral rotation amplitude is small, maintaining the original force state of the two-force rod. When the lateral rotation amplitude is large, it changes to a rotation state and is maintained by the locking mechanism. After a disaster, it can be reset by a lever to restore the original locked state.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) Out-of-plane rotation is possible: Since the left and right dampers are connected by a pin through an earring, they can rotate. The earring plane of the damper is consistent with the rotation plane. This can effectively prevent the viscous damper from failing due to out-of-plane deformation of the main structure when subjected to strong earthquakes or strong winds.

[0024] (2) The connection form can be changed according to the plane rotation angle: Due to the provision of a rotation-stop mechanism and a locking mechanism, when the main structure is subjected to bidirectional earthquake or wind vibration and undergoes torsional deformation, the viscous damper assembly will rotate out of the plane accordingly. When the rotation amplitude is small, that is, when the torsional effect of the main structure is not significant, the viscous damper assembly will maintain a unidirectional force state, and only the piston reciprocating motion in the plane will occur; when the torsional effect of the main structure is significant, the out-of-plane rotation amplitude of the viscous damper increases. At this time, the rotation-stop mechanism fails, and the locking mechanism locks the assembly in the rotation state. The viscous damper can rotate out of the plane around the axis of rotation, and the rotation amplitude is 60° (clockwise and counterclockwise).

[0025] (3) Easy reset: For the main structure that is subjected to a strong earthquake or strong wind with a significant torsional effect, after the damper enters the rotation state and deforms out of the plane, the structural vibration stops. At this time, the locking mechanism can be released by the lever of the locking mechanism, so that the viscous damper assembly device can be reset to the initial rotation-stopping state to exert normal use capabilities.

[0026] (4) The present invention adopts mechanical motion and does not involve other forms of energy conversion. Its motion state is stable, durable, simple to assemble, and low in cost.

[0027] The present invention has important practical value in solving technical problems such as plastic deformation and damage of viscous dampers in high-intensity earthquake zones under strong earthquakes or wind-sensitive structures under strong winds, and difficulty in restoring failed dampers after disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an overall top view of the viscous damper assembly device according to an embodiment of the present invention;

[0029] Figure 2 This is a top view of the left damper of the viscous damper assembly according to an embodiment of the present invention;

[0030] Figure 3 A top view of the right damper of the viscous damper assembly device according to an embodiment of the present invention;

[0031] Figure 4 1 is a side view of two viscous dampers of a viscous damper assembly according to an embodiment of the present invention;

[0032] Figure 5 This is a partial enlarged schematic diagram of the connection portion of the viscous damper assembly device according to an embodiment of the present invention (in normal use);

[0033] Figure 6 This is a partial enlarged schematic diagram of the connection portion of the viscous damper assembly device according to an embodiment of the present invention (contact constraint state);

[0034] Figure 7 This is a schematic diagram of a southwest isometric device of the right viscous damper according to an embodiment of the present invention, with the cross section taken along line Ⅰ-Ⅰ;

[0035] Figure 8 This is a schematic diagram of a southwest isometric device of the connection portion of the viscous damper assembly device according to an embodiment of the present invention;

[0036] Figure 9 1. A side view of the right viscous damper according to an embodiment of the present invention taken along line Ⅰ-Ⅰ;

[0037] Description of the marks in the figure:

[0038] 1-left damper, 11-front earring a, 12-piston rod a, 13-sealing cover a, 14-damping medium a, 15-medium hole a, 16-piston head a, 17-sealing cover b, 18-steel cylinder a, 19-rear earring a, 110-cavity a, 111-through hole a, 2-right damper, 21-front earring b, 22-piston rod b, 23-sealing cover c, 24-damping medium b, 25-medium hole b, 26-piston head b, 27-sealing cover d, 28-steel cylinder b, 29-rear earring b, 210-cavity b, 211-through hole b, 3 -pin shaft, 4-anti-rotation mechanism, 41-limiting column, 42-limiting hole, 43-anti-rotation groove, 44-dial lever a, 45-column a, 46-anti-rotation lever, 47-through hole c, 48-column b, 49-compression spring a, 410-compression spring b, 411-through hole d, 5-locking mechanism, 51-lock tongue, 52-lock tongue circular plate, 53-U-shaped connecting rod, 54-spring, 55-dial lever b, 56-slide groove, 6-left damper support, 7-right damper support. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Example 1

[0040] like Figure 1-3 As shown, the viscous damper assembly consists of a left damper 1 and a right damper 2 connected by a pin 3 via earrings 19 and 29, with the contact surface perpendicular to the wall or column. In this embodiment, the rear earring a19 of the left damper is connected to the rear earring b29 of the right damper, with the rear earring a of the left damper positioned above and the rear earring b of the right damper positioned below. A rotation stop mechanism 4 and a locking mechanism 5 are added. The rotation stop mechanism 4 allows the connecting shaft to remain locked when the lateral rotation amplitude is small, maintaining the original force state of the two-force rod. When the lateral rotation amplitude is large, the connecting shaft changes to a rotating state, which is maintained by the locking mechanism 5. After a disaster, the locking state can be restored by resetting the lever b55. The left damper support 6 and the right damper support 7 are hinged to the damper and fixed to the wall or column.

[0041] like Figure 2 The left damper is composed of a front earring a11, a piston rod a12, a sealing cover a13, a sealing cover b17, a damping medium a14, a medium hole a15, a piston head a16, a steel cylinder a18, a rear earring a19, a cavity a110, a through hole a111, etc. Figure 3The right damper 2 consists of a front earring b21, a piston rod b22, a sealing cover c23, a sealing cover d27, a damping medium b24, a medium hole b25, a piston head b26, a steel cylinder b28, a rear earring b29, a cavity b210, and a through hole b211. The front earring a11 of the left damper is connected to the piston rod a12, and the rear earring a19 is connected to the steel cylinder a18 body; the front earring b21 of the right damper is connected to the piston rod b22, and the rear earring b29 is connected to the steel cylinder b28 body, and in the side view Figure 4 As can be seen in the figure, the lower and upper surfaces of the rear earrings a19 and b29 of the left and right dampers should be flush with the horizontal cross-sections of the steel cylinders a18 and b28 passing through the center of the circle respectively;

[0042] Except for the rear earrings a19 and b29, the sizes of all components in the left and right dampers are consistent; Figure 5 The anti-rotation mechanism 4 in the connecting part includes a limiting column 41 fixed to the left side of the through hole b of the rear earring b29, a limiting hole 42 provided on the left side of the through hole a of the rear earring a19, an anti-rotation groove 43 provided on the right side of the through hole a of the rear earring a19, a lever 44 integrally connected to the rear earring a19, an anti-rotation rod 46 rotatable around the column a45, a square through hole c47 provided on the anti-rotation rod 46, a column b48 fixed to the anti-rotation rod 46, two compression springs 49 and 410 respectively connected to the right damper steel cylinder b and the anti-rotation rod 46, and a square through hole d411 provided on the ear plate of the rear earring b29. Take a cross-section of the right damper earring along Ⅰ-Ⅰ, and its southwest isometric diagram is shown as follows. Figure 7 As shown, the locking mechanism 5 in the connecting portion includes a movable lock tongue 51 located on the rear earring b29, a circular plate 52 fixed below the lock tongue, a U-shaped connecting rod 53 connected to the lock tongue circular plate, a spring 54 surrounding the connecting rod, a lever 55 connected to the U-shaped rod, and a slide groove 56 fixed to the right damper steel cylinder.

[0043] In this embodiment, the surface of the anti-rotation groove 43 and the side of the anti-rotation rod in the anti-rotation mechanism 4 are both sandblasted. The contact surface between the anti-rotation groove 43 and the anti-rotation rod 46 is uniformly rounded. The two compression springs 49 and 410 in the anti-rotation mechanism 4 are welded to the steel cylinder b28 and the anti-rotation rod 46 on both sides. The lock tongue 51 in the locking mechanism 5 is embedded in the rear earring b29, and the lower lock tongue circular plate 52 is used to limit the maximum upward travel of the lock tongue 51, as shown in FIG. Figure 7 , a blind hole should be provided in the rear earring b to facilitate the placement of the lock bolt circular plate 52, and a square through hole d411 should be provided to place the lock bolt 51. The width of the slide groove 56 in the locking mechanism should be slightly larger than the diameter of the spring 54 to facilitate the fixing of the spring position.

[0044] The three-dimensional view of the entire connection part of the viscous damper assembly is as follows: Figure 8As shown, the left damper 1 and the right damper 2 are overlapped and connected through the pin 3, the rear earring a19 is located above the rear earring b29, and the left damper support 6 and the right damper support 7 are fixed to the wall or column so that the overlapping surface is perpendicular to the wall or column.

[0045] exist Figure 5 、 Figure 9 The necessary dimensional parameters of this embodiment (designed for a maximum normal deflection angle of 15° and a maximum clockwise and counterclockwise free rotation deflection angle of 60°) are set as follows:

[0046] (1) The diameter of the steel cylinder end of the viscous damper is 180 mm, the diameter of the earring is 150 mm, the diameter of the pin is 40 mm, the diameter of the pin cap is 50 mm, the distance between the pin center and the steel cylinder is 150 mm, the diameter of the limit column 41 is 15 mm, and the angle of the limit hole 42 is 120°;

[0047] (2) The angle of the anti-rotation groove 43 on the ear plate of the rear earring a19 is 60°, the radius of the groove arc is 55mm, the angle between the lower part of the protruding part of the anti-rotation rod 46 and the groove is 15°, there is no strict requirement for the size of the lever 44 fixed on the rear earring a19, but the distance from its end to the center of the pin should be 92mm, the diameter of the anti-rotation rod shaft is 8mm, the length of the square through hole c47 on the anti-rotation rod 46 is 20mm, the width is 12mm, the diameter of the column b48 fixed on the anti-rotation rod 46 is 15mm, and the length of the compression spring a49 and compression spring b410 is 50mm;

[0048] (3) The side of the anti-rotation rod 46 must be in close contact with the anti-rotation groove 43;

[0049] (4) A square through hole d411 is provided on the ear plate of the rear earring b29. Its size is the same as that of the square through hole c47. Its position is obtained by rotating the through hole c47 15° counterclockwise around the center of the rotation axis. The locking mechanism below is all arranged with the through hole d411 as the center.

[0050] (5) The movable lock tongue 51 located on the rear earring b29 has the same size as the through hole d411. The angle of the lock tongue is 45 degrees and it is embedded in the earring to a certain depth. The circular plate 52 fixed below the lock tongue has a diameter of 40 mm and a thickness of 8 mm. The cross-section of each rod of the lower U-shaped connecting rod 53 is rectangular, with a length and width of 5 mm and a distance of 12 mm between the two vertical rods. The spring 54 surrounding the connecting rod is 20 mm long. The lever 55 connected to the U-shaped rod is 5 mm wide and high and 60 mm long. The slide groove 56 fixed on the right damper steel cylinder b28 is 35 mm long, 30 mm wide and 45 mm high.

[0051] (6) The thickness of the rear earrings a19 and b29 of the left and right dampers are both 25 mm. The height of the upright b48 on the anti-rotation rod 46 and the lever a44 on the rear earring a19 is 15 mm. A blind hole with a thickness of 17 mm is provided below the rear earring b29 of the right damper, and a through hole d is provided for accommodating the lock tongue. Example 2

[0052] When a building structure is subjected to strong earthquakes or strong winds, the primary concern is vibration in two directions within the horizontal plane of the structure. This viscous damper assembly can displace along the damper's steel cylinder. When the left and right supports experience relative displacement, the viscous damper will exhibit out-of-plane motion. This embodiment illustrates the implementation of the viscous damper when out-of-plane motion occurs.

[0053] On the basis of Example 1, the viscous damper assembly has a tendency to move out of the plane. At this time, since the contact surface between the anti-rotation groove 43 and the anti-rotation rod 46 is sandblasted, the increase in friction will prevent the left and right dampers from rotating relative to each other to a certain extent. When the torsional effect of the main structure increases, the tendency of the assembly to rotate out of the plane increases, and the friction anti-rotation fails. At this time, due to the relative rotation of the earrings of the left and right dampers, the lever fixed on the earring of the left damper triggers the locking mechanism when it rotates more than 15°, and the anti-rotation rod 46 is fixed in the open state. Figure 6 As shown, the main structure can rotate 60° clockwise and counterclockwise, protecting the viscous damper from failure and damage. After a strong earthquake or strong wind, the locking mechanism's lever b55 can be mechanically adjusted to reset the anti-rotation lever, restoring it to its original state. Therefore, the present invention significantly protects the viscous damper from strong earthquakes or strong winds.

[0054] In the description of the present invention, the directions or positional relationships indicated by the terms "center", "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships often placed when the invention is used. They are only for the purpose of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention.

[0055] In summary, the present invention has the technical advantages of out-of-plane rotation, easy reset, stable motion state, low cost, simple assembly, and strong applicability. It overcomes the defect of traditional viscous dampers that are prone to out-of-plane plastic failure and is suitable for use in building structures in high-intensity earthquake zones and high-rise wind-sensitive buildings in strong wind areas.

[0056] The above description of the embodiments is intended to facilitate understanding and application of the present invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the embodiments described herein, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention should fall within the scope of protection of the present invention.

Claims

1. A viscous damper assembly capable of rotating out of plane, characterized in that: The invention comprises a left damper (1), a right damper (2) and a connecting device; the connecting device comprises a rotation-stopping mechanism (4), a locking mechanism (5) and a pin shaft (3), wherein the rotation-stopping mechanism (4) controls the relative rotation between the connecting ends of the two dampers, and the locking mechanism (5) maintains the rotation state between the connecting ends of the two dampers; the left damper (1) and the right damper (2) are connected in an overlapping manner through the pin shaft (3), and the overlapping surface is perpendicular to the wall or column.

2. The out-of-plane rotatable viscous damper assembly according to claim 1, characterized in that: The left damper (1) comprises a front earring a (11), a piston rod a (12), a sealing cover a (13), a damping medium a (14), a medium hole a (15), a piston head a (16), a sealing cover b (17), a steel cylinder a (18), a rear earring a (19), a cavity a (110), and a through hole a (111); the front earring a (11) is connected to the piston rod a (12), and the rear earring a (19) is connected to the main body of the steel cylinder a (18); The right damper (2) comprises a front earring b (21), a piston rod b (22), a sealing cover c (23), a damping medium b (24), a medium hole b (25), a piston head b (26), a sealing cover d (27), a steel cylinder b (28), a rear earring b (29), a cavity b (210), and a through hole b (211); the front earring b (21) is connected to the piston rod b (22), and the rear earring b (29) is connected to the main body of the steel cylinder b (28); the rear earring a (19) is provided with a notch groove; The rear earring a (19) is arranged above the rear earring b (29), and the two are overlapped and connected via a pin (3).

3. The out-of-plane rotatable viscous damper assembly according to claim 2, characterized in that: The anti-rotation mechanism (4) includes a limiting column (41), a limiting hole (42), an anti-rotation groove (43), a shift rod a (44), a column a (45), an anti-rotation rod (46), a through hole c (47), a column b (48), a compression spring a (49), a compression spring b (410), and a through hole d (411). The limiting column (41) is fixed to one side of the through hole b (211) of the rear earring b (29). The limiting hole is provided on the rear earring. The through hole a (111) of a (19) is on the side corresponding to the limiting column (41), and the anti-rotation groove (43) is arranged on the right side of the through hole a (111) of the rear earring a (19); the anti-rotation rod (46) is provided with a through hole c (47) and a column b (48) fixed on the anti-rotation rod (46); the two sides of the compression spring a (49) and the compression spring b (410) are respectively welded to the steel cylinder b (28) and the anti-rotation rod (46).

4. The out-of-plane rotatable viscous damper assembly according to claim 2, characterized in that: The locking mechanism comprises: a lock tongue (51), a lock tongue circular plate (52), a U-shaped connecting rod (53), a spring (54), and a slide groove (56); the lock tongue (51) is located on the rear earring b (29), and a lock tongue circular plate (52) is provided below the lock tongue (51); the U-shaped connecting rod (53) is connected to the lock tongue circular plate (52), and the U-shaped connecting rod (53) can be moved in the slide groove (56) located on the steel cylinder b (28) through the shifting rod b (55).

5. The out-of-plane rotatable viscous damper assembly according to claim 3, characterized in that: The viscous damper assembly device has two motion states: when in normal use, the anti-rotation mechanism (4) works normally, and the anti-rotation rod (46) on the surface of the rear earring b (29) is stuck in the groove of the rear earring a (19) under the action of the spring, so that the rear earring a (19) and the rear earring b (29) do not rotate relative to each other around the pin shaft (3); when in the contact constraint state, the lever a (44) above the rear earring a (19) moves the anti-rotation rod (46) out of the groove, the anti-rotation mechanism (4) does not work, and the anti-rotation rod (46) rotates around the axis and finally rotates to trigger the locking mechanism (5). At this time, the lock tongue (51) is pressed and re-ejected, and is just placed at the through hole c (47) on the anti-rotation rod (46), preventing the anti-rotation rod (46) from rotating.

6. The out-of-plane rotatable viscous damper assembly according to claim 5, characterized in that: The locking mechanism (5) releases the lock by moving the U-shaped connecting rod (53) of the lock tongue (51), so that the anti-rotation rod (46) returns to its original position, thereby returning to a normal use state.

7. The out-of-plane rotatable viscous damper assembly according to claim 4, characterized in that: The lock tongue (51) in the locking mechanism (5) is embedded in the ear plate of the rear earring b (29), and the lower lock tongue circular plate (52) is used to limit the maximum upward travel of the lock tongue. A blind hole is provided in the rear earring b to facilitate the placement of the limiting circular plate, and a square through hole d is provided to place the lock tongue.

8. The out-of-plane rotatable viscous damper assembly according to claim 5, characterized in that: The anti-rotation rod (46) rotates around the column a (45).

9. The out-of-plane rotatable viscous damper assembly according to claim 3, characterized in that: The surface of the anti-rotation groove (43) in the anti-rotation mechanism (4) and the side surface of the anti-rotation rod (46) are mechanically processed by sandblasting.

10. The out-of-plane rotatable viscous damper assembly according to claim 4, characterized in that: The width of the sliding groove (56) in the locking mechanism (5) is greater than the diameter of the spring (54).

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