Coupling device comprising a rotational damping structure

Abstract

A coupling device (100) is provided. The coupling device includes a universal joint (110) and a rotational damping structure (120). The universal joint is connected to a first support element (112) and a second support element (114). The universal joint allows relative rotation between the two support elements about a first axis (X) and a second axis (Y) perpendicular to the first axis. The rotational damping structure (120) includes four damping elements (330). Each damping element includes a base (332), a connector portion (334), and a yield portion (336). The yield portion extends between the base and the connector portion. The yield portion is configured to allow relative rotation (ω) between the base and the connector portion. X ω Y Plastic deformation occurs. A first pair of damping elements (130a) are arranged along a first axis on opposite sides of the universal joint. The base of each damping element in the first pair is fastened to a first support element. A second pair of damping elements (130b) are arranged along a second axis on opposite sides of the universal joint. The base of each damping element in the second pair is fastened to a second support element. The connector portion (134a) of each damping element in the first pair is fastened to the connector portion (134b) of each damping element in the second pair, such that the connector portions (134) of the four damping elements form a rigid ring (450) around the universal joint.

Description

Technical Field

[0001] This application relates to the field of coupling devices. More specifically, this application relates to a coupling device including a universal joint and a rotation damping structure. Background Technology

[0002] A universal joint, or coupling, is a connector used to connect two rigid elements, such as two rigid shafts. A universal joint allows the two rigid elements to rotate relative to each other about two perpendicular axes. This makes universal joints suitable for connecting two rigid shafts whose axes are inclined relative to each other, and also for suspending objects, as universal joints allow the suspended object to swing freely about the two axes.

[0003] For example, universal joints can be used in suspended high-pressure valve systems. Vertical switching valves face structural stresses during high seismic ground motion. Conversely, switching valves can be suspended, for example, from the ceiling of a valve hall. Under seismic acceleration, the valve can swing more or less freely, like a pendulum.

[0004] In this system, the high-pressure valve unit can be suspended from the load of the supporting structure via a rigid suspension insulator. A universal joint can be used to connect the high-pressure valve unit to the rigid suspension insulator and vice versa.

[0005] However, while universal joints allow relative rotation about two axes, in some applications it is desirable to suppress or limit this rotation. In the example of a suspension valve system, it is preferable that the high-pressure valve unit is not allowed to swing freely under seismic acceleration. Instead, movement of one or both pivot points can be suppressed to reduce or suppress the swing of the high-pressure valve unit.

[0006] Therefore, connecting equipment is needed to dampen the movement of the universal joint. Summary of the Invention

[0007] A general objective of this disclosure is to improve the rotational damping of universal joints. This and other objectives are achieved by the coupling device as defined in the appended independent claims. Other embodiments are defined by the dependent claims.

[0008] According to one aspect of this disclosure, a coupling device is provided. The coupling device includes a universal joint and a rotational damping structure. The universal joint is connected to a first support element and a second support element. The universal joint allows relative rotation between the first and second support elements about a first axis and a second axis. The first axis is perpendicular to the second axis. The rotational damping structure includes four damping elements. Each damping element includes a base, a connector portion, and a yielding section. The yielding section extends between the base and the connector portion. The yielding section is configured to plastically deform through relative rotation between the base and the connector portion. A first pair of damping elements is arranged along the first axis on opposite sides of the universal joint. The base of each damping element in the first pair is fastened to the first support element. A second pair of damping elements is arranged along the second axis on opposite sides of the universal joint. The base of each damping element in the second pair is fastened to the second support element. The connector portion of each damping element in the first pair of damping elements is fastened to the connector portion of each damping element in the second pair of damping elements, such that the connector portions of the four damping elements form a rigid ring around the universal joint.

[0009] Universal joints are also known as cardan joints, Hooke joints, Spicer joints, or Polhem joints. Coupling devices are used to connect two components or devices, such as two rigid shafts. Components connected via coupling devices can be attached to first and second support elements.

[0010] Each damping element can be called a yield damper or a yield-type damper. A yield damper is a device configured to undergo plastic deformation under stress, thereby absorbing the energy of the force, such as during an earthquake, and suppressing unwanted motion. Under rotational forces between the base element and the connector element, the yield portion of each damping element may undergo elastic deformation before reaching plastic deformation. The size and material of the damping element can be selected so that the yield portion rapidly reaches a state of plastic deformation under rotational forces between the base element and the connector element. If a certain degree of plastic deformation occurs in the yield portion, it may be necessary to replace the damping element.

[0011] The four damping elements can be arranged parallel to the universal joint. The four damping elements can be accessible and replaceable without decoupling the coupling device from the elements or equipment to which it is arranged. Therefore, in the event of an earthquake, for example, the four damping elements can be easily replaced.

[0012] A rotary damping structure comprising four damping elements can mimic the configuration of a universal joint. A universal joint allows motion about two perpendicular axes. The rotary damping structure of this disclosure can decouple the damping of rotational motion about the two axes. A first pair of damping elements can be arranged to dampen rotation about a first axis. A second pair of damping elements can be arranged to dampen rotation about a second axis.

[0013] Since each damping element moves only around one axis, the shape of the damping element can be optimized only for that axis.

[0014] According to some embodiments, the first axis may intersect the yield portion of each damping element in the first pair of damping elements. The second axis may intersect the yield portion of each damping element in the second pair of damping elements.

[0015] Aligning the yield points with the corresponding axes can further specify that each yield point will only move about the axis it is aligned with. Aligning the yield points with the corresponding axes can facilitate the optimization or design of damping elements to suppress movement about the corresponding axes.

[0016] According to some embodiments, for each damping element, the yield portion may extend longitudinally between the base and the connector portion. The base may extend laterally on both sides of the yield portion. The connector portion may extend laterally on both sides of the yield portion.

[0017] The base can extend laterally to improve and facilitate a secure fastening between the base and the support element. The connector portion can extend laterally to a width corresponding to the width of the universal joint, allowing the connector portions of the four damping elements to form a rigid ring around the universal joint. The width of the connector portion of the damping element can define the width of the damping element.

[0018] The width of the yield portion can be smaller than the width of the connector portion and the width of the base. The yield portion can define the waist of the damping element. The yield portion can have a shape such that it will undergo plastic deformation when rotated relative to the base and connector portion. At the same time, the base and connector portion can retain their original shapes.

[0019] Both the base and the connector portion can extend on the same sides of the yield portion. Therefore, the damping element can have a general shape with a serif capital I or a capital T.

[0020] Alternatively, the yielding portion may extend diagonally between the base and the connector portion, forming a general Z-shape.

[0021] According to some embodiments, for each damping element, the connector portion may include a first side extending toward the base from a first side of the yield portion. The connector portion of each damping element may include a second side extending toward the base from a second side of the yield portion. Each side of each damping element may be configured to be fastened to a side of an adjacent damping element.

[0022] The connector portion may extend at least partially perpendicular to the longitudinal axis of the damping element. The side portion of the connector portion may extend at least partially parallel to the longitudinal axis of the damping element. The connector portion may extend at least partially diagonally relative to the longitudinal axis of the damping element.

[0023] The inner surface of a connector portion (e.g., a side portion) can be configured to attach to the lateral surface of a different connector portion, such as the lateral surface of a side portion.

[0024] According to some embodiments, each damping element in the first pair of damping elements can be arranged in a corresponding plane perpendicular to the first axis. Each damping element in the second pair of damping elements can be arranged in a corresponding plane perpendicular to the second axis.

[0025] According to some embodiments, each damping element can be symmetrical about the longitudinal axis (U).

[0026] According to some embodiments, the first pair of damping elements has a wider width than the second pair of damping elements. The inner surface of the connector portion of each damping element in the first pair of damping elements can be configured to fasten to the corresponding lateral surface of the connector portion of each damping element in the second pair of damping elements.

[0027] According to some embodiments, for each damping element, the yield portion can be centered relative to the base. A first side of the connector portion of each damping element can extend laterally from the yield portion by a first distance. A second side of the connector portion of each damping element can extend laterally from the yield portion by a second distance. The first distance can be greater than the second distance. The inner surface of the first side of the connector portion of each damping element can be configured to fasten to the side surface of the second side of the connector portion of an adjacent damping element.

[0028] In other words, the base can extend the same distance from the yielding portion in the opposite transverse direction. The connector portion can extend a first distance from the yielding portion in one transverse direction and a smaller second distance in the opposite transverse direction.

[0029] The difference between the first distance and the second distance can be equal to the thickness of the damping element, such as the thickness of the connector portion of the damping element, or the thickness of the first side of the connector portion.

[0030] According to some embodiments, each damping element may be made of a single piece of material.

[0031] Damping elements can be cut from a single piece of material, molded into a single piece of material, or otherwise shaped into a single piece of material.

[0032] Alternatively, damping elements can be formed by connecting different sheets of material together.

[0033] According to some embodiments, each damping element may include at least one of low-carbon steel, aluminum, lead, copper, and shape memory alloy.

[0034] It should be noted that other embodiments using all possible combinations of the features described in the above embodiments are foreseeable. Therefore, this disclosure also relates to all possible combinations of the features described herein. Attached Figure Description

[0035] Exemplary embodiments will now be described in more detail with reference to the following figures:

[0036] Figure 1 These are illustrations of a connection device according to some embodiments; Figure 2 These are illustrations of a universal joint according to some embodiments; Figure 3 These are illustrations of damping elements according to some embodiments; Figure 4 These are illustrations of a rotational damping structure according to some embodiments; Figure 5 This is an illustration of a connecting device rotating about a first axis according to some embodiments; Figure 6 This is an illustration of a connecting device rotating about a second axis according to some embodiments; and Figure 7 This is a close-up view of the yield portion of a damping element according to some embodiments.

[0037] As shown in the figures, the dimensions of elements and regions may be exaggerated for illustrative purposes; therefore, these elements and regions are provided to illustrate the general structure of the embodiments. The same reference numerals refer to the same elements throughout this document. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments are illustrated. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments described herein; rather, these embodiments are provided so as to provide thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0039] Reference Figure 1The following describes a connection device 100 according to some embodiments. The connection device 100 is shown in perspective view.

[0040] The coupling device 100 includes a universal joint 110 connected to a first support element 112 and a second support element 114. The first support element 112 can be connected to a first element to be coupled using the coupling device 100. The second support element 114 can be connected to a second element to be coupled using the coupling device 100.

[0041] The universal joint 110 allows relative rotation between the first support element 112 and the second support element 114 about a first axis X and a second axis Y. The first axis X is perpendicular to the second axis Y.

[0042] The coupling device 100 also includes a damping device 120, which includes four damping elements 130a, 130b arranged to form a rigid ring or loop around the universal joint 110. Each damping element includes a base 132a, 132b, a connector portion 134a, 134b, and a yield portion 136a, 136b extending between the base 132a, 132b and the connector portion 134a, 134b.

[0043] Damping elements 130a and 130b are arranged in two pairs. The first pair of damping elements 130a are arranged along a first axis X on opposite sides of the universal joint 110. The base 132a of the first pair of damping elements 130a is fastened to a first support element 112. The second pair of damping elements 130b are arranged along a second axis Y on opposite sides of the universal joint 110. The second pair of damping elements 130b are arranged inverted relative to the first pair of damping elements 130a. The base 132b of each damping element in the second pair of damping elements 130b is fastened to a second support element 114.

[0044] exist Figure 1 In the first pair of damping elements 130a, each damping element is arranged in a corresponding plane perpendicular to the first axis X. In the second pair of damping elements 130b, each damping element is arranged in a corresponding plane perpendicular to the second axis Y.

[0045] The connector portion 134a of each damping element in the first pair of damping elements 130a is fastened to the connector portion 134b of each damping element in the second pair of damping elements 130b. Thus, the four damping elements 130a, 130b form a rigid ring around the universal joint 110.

[0046] The first pair of damping elements 130a is arranged such that the first axis X intersects the yield portion 136a of each damping element in the first pair of damping elements 130a. The second pair of damping elements 130b is arranged such that the second axis Y intersects the yield portion 136b of each damping element in the second pair of damping elements 130b.

[0047] The yielding portions 136a and 136b are configured to allow relative rotation ω between the bases 132a and 132b of the damping elements 130a and 130b and the connector portions 134a and 134b. X ω Y Plastic deformation. The arrangement of damping elements 130a and 130b allows for any rotation ω between the two support elements 112 and 114 about the first axis X. X Both are damped by the first pair of damping elements 130a. Specifically, when a rotational force is applied about the first axis X, the yield portion 136a of the first pair of damping elements 130a can first undergo a short period of elastic deformation, followed by plastic deformation. The plastic deformation of the yield portion 136a will absorb the energy from the rotational force, thereby damping the rotational motion caused by that force. Similarly, any rotation ω between the two support elements 112, 114 about the second axis Y is damped. Y Damping can be achieved through the plastic deformation of the yield portion 136b of the second pair of damping elements 130b.

[0048] Figure 2 A universal joint 210 is shown connecting the first support element 212 and the second support element 214. The universal joint 210 can be equivalent to the one described above. Figure 1 The universal joint 110 is mentioned above.

[0049] A connecting structure including two ears 216 extends from the first support element 212 toward the second support element 214. Each ear includes a circular through-hole opening, allowing a circular shaft to be rotatably arranged therein. Two additional ears 218 extend from the second support element 214 toward the first support element 212. Each of the additional ears 218 also includes a circular through-hole opening, allowing a circular shaft to be rotatably arranged therein. The pair of second ears 218 are rotated 90 degrees relative to the pair of first ears 216.

[0050] The first shaft 222 is arranged in the openings of the two second ears 218. The two second ears 218 and the second support element 214 are rotatable about the first shaft 222. X This causes the first axis to define a first axis of rotation X. A second axis 224 is arranged in the openings of the two first ears 216. The two first ears 216 and the first support element 212 are rotatable ω about the second axis 224. YThis allows the second axis to define a second rotational axis Y perpendicular to the first axis X. The first axis 222 and the second axis 224 are connected. Thus, the universal joint 210 allows relative rotational movement between the first support element 212 and the second support element 214 about the first axis X and the second axis Y. For example, the first axis 222 and the second axis 224 can be connected to form a cross-shaped rod.

[0051] Figure 3 This is a diagram showing the damping element 330 as viewed from the front. The damping element 330 can be considered equivalent to the one described above. Figure 1 The damping elements 130a and 130b are mentioned above.

[0052] The damping element 330 has a longitudinal axis U and a transverse axis V. The longitudinal axis is aligned with the center of the yield portion 336 of the damping element 330. The yield portion 336 extends longitudinally from the base 332 to the connector portion 334 along the longitudinal axis U.

[0053] The base 332 is centered on the longitudinal axis U. Figure 3 In the middle, the base 332 is symmetrical about the longitudinal axis U. The base 332 includes a connecting hole 345, such as a drilled hole, for facilitating a mechanical connection with a support element, such as the one described above. Figure 1 The first and second support elements 112, 114 of the connecting device 100. The connecting hole 345 may, for example, be configured to receive a screw to fasten the damping element 330 to the support element.

[0054] The connector portion 334 extends laterally from the yielding portion 336 along the transverse axis V in two opposite directions. In some embodiments, the connector portion 334 may also be symmetrical about the longitudinal axis U. However, in Figure 3 In the connector portion 334, a first side extends a first distance d1 from the longitudinal axis U, while a second side extends a shorter second distance d2 from the longitudinal axis U. The first side of the connector portion 334 includes a first side portion 338. The first side portion 338 extends at least partially along the longitudinal axis U toward the base. The second side of the connector portion 334 includes a second side portion 340. The second side portion 340 extends at least partially along the longitudinal axis U toward the base. The first side portion 338 is configured to be fastened to the second side portion 340 of an adjacent damping element 330.

[0055] Now will be further referenced Figure 4 .exist Figure 4 In, equivalent to Figure 3 Damping elements 430a and 430b of damping element 330 are arranged in rotational damping structure 420. Rotational damping structure 420 can be equivalent to the one described above. Figure 1 The rotational damping structure 120 is described above.

[0056] like Figure 4 As shown, the first sides 438a and 438b of each damping element 430a and 430b are attached to the second sides 440a and 440b of the adjacent damping elements 430b and 430a. Specifically, the inner surface 446a of the first side 438a is attached to the transverse surface of the second side 440b of the adjacent damping element 430b. Figure 3 (344) above.

[0057] Back Figure 3 The first side portion 338 includes a through-hole 342 extending from the front surface 337 of the damping element 330 to the rear surface. In, for example... Figure 4 In the arrangement of the rotational damping structure 420, the front surface 337 can be arranged as an inner surface 446a or an outer surface. The lateral surface 344 of the second side 340 includes an opening 344. Therefore, in the arrangement of... Figure 4 In the case of a rotational damping structure, a screw or other fastening device can be used to attach the first side 438a to the second side 440b of the adjacent damping element 430b. The screw or other fastening device can be inserted through a through hole 442 in the first side 438a of the first damping element 430a and into an opening 443 in the second side 440b of the adjacent damping element 430b.

[0058] As previously described, the first side of connector element 334 can extend a first distance d1 from the longitudinal axis U. The second side of connector element 334 can extend a second distance d2 from the longitudinal axis U. Figure 4 As shown, the first distance d1 can be equal to the second distance d2 plus the thickness t of the first side portion 438a. As a result, the yield portions 336 of each pair of damping elements 430a, 430b can become aligned with each other and with the corresponding axes of rotation X, Y (e.g., ...). Figure 1 and Figure 2 (As shown).

[0059] exist Figure 3 The damping element 330 is shown from the front. The front surface 337 can be a first main surface of the damping element 330. The front surface 337 can be planar. The plane of the front surface 337 can be parallel to the longitudinal axis U and the transverse axis V. The damping element 330 can include a second main surface opposite to the front surface 337. The second main surface can be planar and can be parallel to the front surface 337. As a result, the damping element can have a uniform thickness t in the directions perpendicular to the longitudinal and transverse axes.

[0060] The damping element 330 may be made of a single material. The damping element 330 may include at least one of low-carbon steel, aluminum, lead, copper, and shape memory alloy.

[0061] The rotary damping structures 120 and 420 can mimic the function of the universal joints 110 and 220 because the motion about the first axis X can be decoupled from the motion about the second axis Y. The arrangement of the damping elements 130a and 130b can provide decoupling of the rotary damping about the two axes.

[0062] Figure 5 A rotational damping structure 520 is shown, which can be equivalent to any of the rotational damping structures 120, 420 described above with reference to the foregoing figures. The rotational damping structure 520 is viewed from one of the first pair of damping elements 530a. The second support element 114 rotates ω about the first axis X. X In this case, the second pair of damping elements 530b attached to the second support element are subjected to tension and compressive forces respectively between the base connected to the second support element 514 and the connector portion forming part of the rigid ring 550. The damping elements 530b can resist tension and compressive forces to a high degree, so the torque is transmitted from the second support element 114 to the second pair of damping elements 530a via the rigid ring 550. On the other hand, the first pair of damping elements 530a are subjected to rotational forces between the base 532a connected to the first support element 512 and the connector portion 534a forming part of the rigid ring 550. The yield portion 536a of the first pair of damping elements 530a is configured to bend and plastically deform during rotational movement / force between the base 532a and the connector portion 534a, which suppresses the movement ω. X .

[0063] Therefore, the relative movement ω between the first support element 512 and the second support element 514 around the first axis X X In this case, the rigid ring 550 can move together with the second support element 514. Therefore, when rotating only about the first axis X, only the first pair of damping elements 530a performs damping.

[0064] Figure 6 A rotational damping structure 620 is shown, which can be equivalent to any of the rotational damping structures 120, 420, and 520 described above with reference to the foregoing figures. The rotational damping structure 620 is viewed from one of the second pair of damping elements 530b. The second support member 114 rotates ω about the second axis Y. Y In this case, the second pair of damping elements is subjected to rotational force between the base element 532b and the connector element 534b. The yield portion 536b of the second pair of damping elements 530b is configured to bend and plastically deform during rotational movement between the base 532b and the connector 534b, which inhibits the movement ω. Y .

[0065] Therefore, the relative movement ω between the first support element 612 and the second support element 612 YIn this case, the rigid ring 650 can move together with the first support element 612. Therefore, when rotating only about the second axis Y, only the second pair of damping elements 630b performs damping.

[0066] Figure 7 This is a diagram of the yield portion 736 of the damping element 730. The damping element 730 can be equivalent to any of the damping elements described above with reference to the foregoing figures.

[0067] Since each damping element in the rotational damping structure is subjected to rotational force only about one of the axes, the damping element 730 can be optimized to suppress rotation only about that axis.

[0068] For example, the length L, width W, and / or thickness T of the yield portion 736 can be adjusted or selected to suppress rotation about the corresponding axis.

[0069] The angle at which the damping element 730 begins to act, i.e., the angle at which it begins to undergo plastic deformation, can depend on the width W and length L of the yield portion 736. The maximum torque that the damper 730 can withstand may depend on the width W, length L, and thickness T of the yield portion. Therefore, the thickness T can be selected to achieve the required maximum torque.

[0070] Those skilled in the art will recognize that the present invention is by no means limited to the preferred embodiments described above. Rather, many modifications and variations are possible within the scope of the appended claims.

[0071] Although features and elements have been described in specific combinations above, each feature or element can be used alone without the need for other features and elements; or it can be combined with other features and elements in various ways, or it can be used without the need for other features or elements.

[0072] Furthermore, through a study of the accompanying drawings, this disclosure, and the appended claims, those skilled in the art can understand and implement variations of the disclosed embodiments in practicing the claimed invention. In the claims, the word "comprising" does not exclude other elements, and the indefinite articles "a" or "an" do not exclude a plural. The fact that certain features are referenced in mutually different dependent claims does not mean that combinations of these features cannot be used advantageously.

Claims

1. A connection device (100), comprising: A universal joint (110) is connected to a first support element (112) and a second support element (114), the universal joint allowing relative rotation between the two support elements about a first axis (X) and a second axis (Y) perpendicular to the first axis; and A rotational damping structure (120) includes four damping elements (330), each damping element including a base (332), a connector portion (334), and a yield portion (336) extending between the base and the connector portion, the yield portion being configured to withstand relative rotation (ω) between the base and the connector portion. X ω Y Plastic deformation; The first pair of damping elements (130a) are arranged on opposite sides of the universal joint along the first axis, wherein the base (132a) of each of the first pair of damping elements is fastened to the first support element. The second pair of damping elements (130b) are arranged along the second axis on opposite sides of the universal joint, wherein the base (132b) of each damping element in the second pair is fastened to the second support element; and In this configuration, the connector portion (134a) of each damping element in the first pair of damping elements is fastened to the connector portion (134b) of each damping element in the second pair of damping elements, such that the connector portions (134) of the four damping elements form a rigid ring (450) around the universal joint.

2. The connection device according to claim 1, wherein: The first axis (X) intersects the yield portion (136a) of each of the first pair of damping elements; and The second axis (Y) intersects the yield portion (136b) of each of the second pair of damping elements.

3. The connecting device according to any one of the preceding claims, wherein, For each damping element: The yielding portion extends longitudinally (U) between the base and the connector portion; The base extends laterally (V) on both sides of the yielding portion; and The connector portion extends laterally on both sides of the yielding portion.

4. The connecting device according to any one of the preceding claims, wherein: For each damping element, the connector portion (334) includes a first side portion (338) extending toward the base on a first side of the yield portion and a second side portion (340) extending toward the base on a second side of the yield portion; and Each side of each damping element is configured to be fastened to the side of the adjacent damping element.

5. The connecting device according to any one of the preceding claims, wherein: Each damping element in the first pair of damping elements is arranged in a corresponding plane perpendicular to the first axis; and Each of the second pair of damping elements is arranged in a corresponding plane perpendicular to the second axis.

6. The connecting device according to any one of the preceding claims, wherein, Each damping element is symmetrical about the longitudinal axis (U).

7. The connecting device according to any one of the preceding claims, wherein, The first pair of damping elements has a wider width than the second pair of damping elements, and wherein the inner surface (446a) of the connector portion of each of the first pair of damping elements is configured to be fastened to the corresponding transverse surface (344) of the connector portion of each of the second pair of damping elements.

8. The connecting device according to any one of claims 1-5, wherein, For each damping element: The yielding portion is centered relative to the base; The first side of the connector portion extends laterally from the yielding portion by a first distance (d1), and the second side of the connector portion extends laterally from the yielding portion by a second distance (d2), wherein the first distance is greater than the second distance; and The inner surface (446a) of the first side of the connector portion is configured to fasten to the transverse surface (344) of the second side of the connector portion of the adjacent damping element.

9. The connecting device according to any one of the preceding claims, wherein, Each of the damping elements is made of a single piece of material.

10. The connecting device according to any one of the preceding claims, wherein, Each of the damping elements comprises at least one of low-carbon steel, aluminum, lead, copper, and shape memory alloy.

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