Combined unidirectional damper

Abstract

This invention relates to the field of vibration damping devices, and particularly to a combined unidirectional damper. It includes a first support shaft, a second support shaft, a unidirectional component, a first damping component, and a second damping component. The first and second support shafts are coaxially arranged. The unidirectional component is sleeved on the second support shaft, and the second support shaft is connected to a lead screw nut via the unidirectional component. A sleeve is fitted over the first support shaft, and the sleeve is fixedly connected to the lead screw nut. The first damping component includes a magnet and a conductor ring, which are respectively disposed on the first support shaft and the sleeve. This design reduces the possibility of damage to the bridge's connection point with the damper, the abutment, and the surrounding rock mass due to tensile forces, thereby improving the stability of the bridge.

Description

Technical Field

[0001] This invention relates to the field of vibration damping devices, and in particular to a combined unidirectional damper. Background Technology

[0002] During the operation of a bridge, it is affected by wind, earthquakes, vehicle traffic, temperature, etc., and the main beam will undergo horizontal displacement or vibration. Over time, the bridge will accumulate a large displacement, which seriously affects the stability of the bridge. Therefore, dampers and other vibration suppression devices are often used to suppress the displacement or vibration of the bridge.

[0003] When bridges are built in mountainous areas, the abutments at both ends of the bridge are usually connected and fixed to the surrounding rock mass. When the bridge experiences longitudinal displacement or vibration, the dampers installed at the ends of the bridge will have a damping effect. The damper at one end of the bridge will exert pressure on the bridge, while the damper at the other end will exert tension on the bridge, thereby reducing the amplitude of bridge vibration or displacement. When the dampers exert tension on the bridge, they will also exert tension on the rock mass around the abutment. Over time, this will cause the rock mass to gradually deteriorate, which will lead to the risk of damage to the abutment structure.

[0004] Meanwhile, depending on the frequency, bridge vibrations can be categorized into static displacement, quasi-static vibration displacement below the bridge's fundamental frequency, and general vibration displacement above the bridge's fundamental frequency. Existing dampers typically include liquid viscous dampers, eddy current dampers, and friction dampers. Liquid viscous dampers are simple to maintain and have low maintenance costs, but they are prone to oil leakage and aging under long-term operating conditions. Eddy current dampers have good control effects on general vibration displacements, but they generate relatively small damping forces under static or quasi-static vibration displacements, often resulting in poor control effects for these displacements. Friction dampers mostly use plate friction structures, which have good vibration suppression effects on static or quasi-static vibration displacements, but under long-term excitation environments of general vibration displacements, they experience high wear rates and loosening of preload bolts, leading to a significant decrease in their mechanical properties. Existing dampers struggle to simultaneously achieve good vibration suppression effects for static, quasi-static, and general vibration displacements. Summary of the Invention

[0005] The purpose of this invention is to overcome the defect that existing dampers, when generating axial tensile force, will exert tensile force on the bridge, abutment and surrounding rock mass, thereby causing damage to the connection between the bridge and the damper, the abutment and the surrounding rock mass, and to provide a combined unidirectional damper.

[0006] This invention provides a combined unidirectional damper, comprising a first support shaft, a second support shaft, a unidirectional component, a first damping component, and a second damping component. The first support shaft and the second support shaft are coaxially arranged. The unidirectional component is sleeved on the second support shaft. The second support shaft is connected to a lead screw nut through the unidirectional component. A sleeve is sleeved on the first support shaft, and the sleeve is fixedly connected to the lead screw nut. The first damping component includes a magnet and a conductor ring, which are respectively disposed on the first support shaft and the sleeve.

[0007] When the second support shaft approaches the first support shaft axially, the second support shaft can drive the lead screw nut and the sleeve to rotate around the first support shaft axially through the one-way component, and the second damping component can generate a damping torque;

[0008] When the second support shaft moves axially away from the first support shaft, the second support shaft slides relative to the lead screw nut.

[0009] By coaxially arranging the first and second support shafts, vibrations caused by misalignment between the first and second support shafts are reduced, thereby improving system stability and reliability. By allowing both the first and second support shafts to move axially, the damper has a wider range of travel when subjected to vibration, thus enhancing its vibration damping performance. Furthermore, compared to fixing either the first or second support shaft, this arrangement reduces the possibility of stress concentration due to a fixed support at one end, improving the damper's safety. The one-way component is sleeved on the second support shaft and fixedly connected to it, enabling synchronous movement with the second support shaft. The second support shaft is connected to a lead screw nut via the one-way component, allowing the lead screw nut to rotate only in one direction around the one-way component. That is, when the second support shaft moves axially in one direction, it can drive the lead screw nut to rotate via the one-way component. When the second support shaft moves axially in another direction, the lead screw nut remains stationary. This design ensures that the lead screw nut rotates only when the second support shaft moves in a specific direction, thus reducing the probability of load transmission in a non-predetermined direction. A sleeve is fitted over the first support shaft, connected to the lead screw nut. When the lead screw nut rotates, it drives the sleeve to rotate, causing the sleeve to rotate around the first support shaft. The magnet can be connected to the first support shaft, and the conductor ring can be connected to the inner wall of the sleeve, with the conductor ring and magnet corresponding in position. When the sleeve rotates, it drives the conductor ring to rotate, generating an eddy current damping torque relative to the magnet. Alternatively, the conductor ring can be connected to the first support shaft, and the magnet to the inner wall of the sleeve, with the magnet and conductor ring corresponding in position. When the sleeve rotates, it drives the magnet to rotate, generating an eddy current damping torque relative to the conductor ring.

[0010] When the sleeve rotates axially about the first support shaft, the conductor ring rotates relative to the magnet, thereby generating an eddy current damping torque, and the second damping component also generates a damping torque.

[0011] When the sleeve does not rotate, the conductor ring is stationary relative to the magnet and therefore does not generate an eddy current damping torque, and the second damping component also does not generate a damping torque.

[0012] When the first support shaft approaches the second support shaft axially, the axial movement of the first support shaft can drive the lead screw nut to rotate around the second support shaft through the one-way component. In turn, the lead screw nut drives the sleeve to rotate around the first support shaft. When the sleeve rotates, the conductor ring rotates relative to the magnet, thereby generating an eddy current damping torque. The second damping component also generates a damping torque.

[0013] When the first support shaft moves away from the second support shaft along the axial direction, the lead screw nut slides relative to the second support shaft, the conductor ring remains stationary relative to the magnet and thus does not generate eddy current damping torque, the sleeve does not rotate, and the second damping component does not generate damping torque.

[0014] By setting the above, the damper can only transmit load in a single direction. When the damper is set at both ends of the bridge, the damper generates pressure along the axial direction but not tension, thereby reducing the probability of the bridge or abutment being subjected to tension, reducing the possibility of the bridge or abutment and the surrounding rock mass being damaged due to tension, and improving the stability of the bridge.

[0015] Compared to a configuration that only allows rotation in one direction and locks in the other, when the second support shaft moves away from the first support shaft, the second support shaft slides relative to the lead screw nut. This configuration reduces friction between the unidirectional component and the lead screw nut, and also reduces the probability of damage to the damper due to sudden changes in torque direction.

[0016] The first support shaft can be connected to the bridge, and the second support shaft can be connected to the bridge abutment; alternatively, the first support shaft can be connected to the bridge abutment, and the second support shaft can be connected to the bridge.

[0017] The second damping component can be a friction damping component or a viscous damping component, etc.

[0018] The sleeve and the lead screw nut can be fixedly connected or detachably connected.

[0019] The magnet is fixedly connected to the first support shaft, or it can be connected in a detachable manner.

[0020] The conductor ring is fixedly connected to the inner wall of the sleeve, or it can be connected in a detachable manner.

[0021] The one-way component can be configured as a one-way clutch or a one-way bearing, etc.

[0022] The second damping component is a friction-type damping component, which includes a first friction component and a second friction component. The first friction component is disposed on the first support shaft, and the second friction component is disposed on the sleeve. The first friction component abuts against the second friction component.

[0023] The second damping component is configured as a friction-type damping component. The first friction component is disposed on the first support shaft, and the second friction component is disposed on the sleeve. When the sleeve rotates, the second friction component disposed on the sleeve rotates accordingly. By setting the first friction component to abut against the second friction component, when the second friction component rotates relative to the first friction component, friction is generated between the first friction component and the second friction component, preventing the second friction component from rotating relative to the first friction component, thereby preventing the sleeve from rotating relative to the first support shaft.

[0024] This configuration improves the damper's vibration suppression effect on static or quasi-static vibration displacements, complementing the first damping component and enhancing the damper's ability to suppress vibration displacements of the bridge at different frequencies.

[0025] An elastic component is also provided between the first support shaft and the first friction component, with both ends of the elastic component abutting against the first support shaft and the first friction component, respectively.

[0026] By placing the elastic component between the first support shaft and the first friction component, and having both ends of the elastic component abut against the first support shaft and the first friction component respectively, the elastic component applies a preload to the first friction component, resulting in greater pressure between the first and second friction components, thereby generating greater friction.

[0027] Furthermore, the elastic component can be fixed between the first support shaft and the first friction component by bolts and nuts, or it can be fixed between the first support shaft and the first friction component by rivets.

[0028] Furthermore, the elastic component can be configured as a disc spring assembly.

[0029] Furthermore, the disc spring assembly includes a plurality of disc springs.

[0030] A support bearing and a thrust bearing are also sleeved on the outside of the first support shaft, and the support bearing and the thrust bearing are both disposed between the first support shaft and the sleeve.

[0031] By setting a support bearing and a thrust bearing between the first support shaft and the sleeve, the support bearing and the thrust bearing can axially position the sleeve when the sleeve rotates, thereby improving the stability of the sleeve during rotation and enhancing the damping effect of the damper.

[0032] The number of magnets is at least 2, and preferably 4.

[0033] Furthermore, the number of magnets can also be set to 3, 5, etc.

[0034] Furthermore, the magnet can be arranged circumferentially along the first support shaft or circumferentially along the inner wall of the sleeve, or axially along the first support shaft or axially along the sleeve.

[0035] By setting the number of magnets, the damper can be configured to meet different usage requirements, thus increasing the flexibility of its use.

[0036] The sleeve also includes a first connector, through which the conductor ring is connected to the inner wall of the sleeve.

[0037] By connecting the conductor ring to the inner wall of the sleeve via the first connector, the stability of the conductor ring installation can be improved, thereby improving the reliability of the damper.

[0038] Furthermore, the connection between the conductor ring and the first connector can be a fixed connection or a detachable connection.

[0039] The first support shaft also includes a second connector, through which the magnet is connected to the first support shaft.

[0040] By connecting the magnet to the first support shaft via the second connector, the stability of the magnet installation can be improved, thereby increasing the reliability of the damper.

[0041] Furthermore, the connection between the magnet and the first connector can be a fixed connection or a detachable connection.

[0042] The lead screw nut is a ball screw nut.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] 1. This invention provides a combined unidirectional damper, comprising a first support shaft, a second support shaft, a unidirectional component, a first damping component, and a second damping component. The first support shaft and the second support shaft are coaxially arranged. The unidirectional component is sleeved on the second support shaft. The second support shaft is connected to a lead screw nut through the unidirectional component. A sleeve is sleeved on the first support shaft, and the sleeve is fixedly connected to the lead screw nut. The first damping component includes a magnet and a conductor ring, which are respectively disposed on the first support shaft and the sleeve. Through this arrangement, the damper can only transmit loads in a single direction. When the damper is placed at both ends of a bridge, it generates pressure along the axial direction without generating tension, thereby reducing the probability of the bridge or abutment being subjected to tension, lowering the possibility of damage to the connection between the bridge and the damper, the abutment, and the surrounding rock mass due to tension, and improving the stability of the bridge. Attached image description:

[0045] Figure 1This is a cross-sectional schematic diagram of a combined unidirectional damper.

[0046] Figure 2 This is a schematic diagram of the installation of a combined unidirectional damper.

[0047] Marked in the image:

[0048] 1-First support shaft, 11-Support bearing, 12-Thrust bearing, 13-Second connecting piece, 14-Stiffening beam, 2-Second support shaft, 21-Bridge abutment, 3-One-way assembly, 4-Magnet, 5-Conductor ring, 6-Sleeve, 61-First connecting piece, 7-Screw nut, 8-First friction component, 9-Second friction component, 10-Elastic assembly. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0050] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0051] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0052] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing between identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0053] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0054] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0055] Example 1

[0056] As attached Figure 1 As shown, a combined unidirectional damper includes a first support shaft 1, a second support shaft 2, a unidirectional component 3, a first damping component, and a second damping component. The first support shaft 1 and the second support shaft 2 are coaxially arranged. The unidirectional component 3 is sleeved on the second support shaft 2. The second support shaft 2 is connected to a lead screw nut 7 through the unidirectional component 3. A sleeve 6 is sleeved on the first support shaft 1. The sleeve 6 is fixedly connected to the lead screw nut 7. The first damping component includes a magnet 4 and a conductor ring 5. The magnet 4 is disposed on the first support shaft 1, and the conductor ring 5 is disposed on the sleeve 6.

[0057] When the second support shaft 2 approaches the first support shaft 1 along the axial direction, the second support shaft 2 can drive the lead screw nut 7 and the sleeve 6 to rotate around the axial direction of the first support shaft 1 through the one-way component 3, and the second damping component can generate a damping torque.

[0058] When the second support shaft 2 moves away from the first support shaft 1 along the axial direction, the second support shaft 2 slides relative to the lead screw nut 7.

[0059] By coaxially arranging the first support shaft 1 and the second support shaft 2, vibrations caused by misalignment of the first support shaft 1 and the second support shaft 2 are reduced, thereby improving the stability and reliability of the system. By allowing both the first support shaft 1 and the second support shaft 2 to move axially, the damper has a wider range of travel when subjected to vibration, thus enhancing its vibration damping performance. Furthermore, compared to fixing either the first support shaft 1 or the second support shaft 2, this arrangement reduces the possibility of stress concentration due to a fixed support at one end, improving the safety of the damper. The one-way component 3 is sleeved on the second support shaft 2 and is fixedly connected to it, allowing the one-way component 3 to move synchronously with the second support shaft 2. The second support shaft 2 is connected to the lead screw nut 7 via the one-way component 3, allowing the lead screw nut 7 to rotate only in one direction around the one-way component 3. That is, when the second support shaft 2 moves axially in one direction, it can rotate in one direction. Component 3 drives the lead screw nut 7 to rotate. When the second support shaft 2 moves axially in another direction, the lead screw nut 7 remains stationary. This arrangement ensures that the lead screw nut 7 can only rotate when the second support shaft 2 moves in a specific direction, thus reducing the probability of load transmission in a non-predictable direction. Furthermore, by providing a sleeve 6 around the first support shaft 1, which is connected to the lead screw nut 7, the lead screw nut 7 can drive the sleeve 6 to rotate when it rotates. This causes the sleeve 6 to rotate around the first support shaft 1. By placing the magnet 4 between the first support shaft 1 and the inner wall of the sleeve 6, and connecting the magnet 4 to the first support shaft 1, the inner wall of the sleeve 6 can rotate relative to the magnet 4 when the sleeve 6 rotates. By providing the conductor ring 5 on the inner wall of the sleeve 6 corresponding to the magnet 4, the position of the conductor ring 5 corresponds to that of the magnet 4. When the sleeve 6 rotates, the sleeve 6 drives the conductor ring 5 to rotate, and the conductor ring 5 rotates relative to the magnet 4, thereby generating an eddy current damping torque.

[0060] When the second support shaft 2 approaches the first support shaft 1 along the axial direction, the axial movement of the second support shaft 2 can drive the lead screw nut 7 to rotate around the second support shaft 2 through the one-way component 3. In turn, the lead screw nut 7 drives the sleeve 6 to rotate around the first support shaft 1. When the sleeve 6 rotates, the sleeve 6 drives the conductor ring 5 to rotate. The conductor ring 5 rotates relative to the magnet 4, thereby generating an eddy current damping torque. The second damping component also generates a damping torque.

[0061] When the second support shaft 2 moves away from the first support shaft 1 along the axial direction, the second support shaft 2 slides relative to the lead screw nut 7, the conductor ring 5 is stationary relative to the magnet 4 and thus does not generate eddy current damping torque, and the second damping component does not generate damping torque.

[0062] When the first support shaft 1 approaches the second support shaft 2 axially, the axial movement of the first support shaft 1 can drive the lead screw nut 7 to rotate around the second support shaft 2 through the one-way component 3. In turn, the lead screw nut 7 drives the sleeve 6 to rotate around the first support shaft 1. When the sleeve 6 rotates, the sleeve 6 drives the conductor ring 5 to rotate. The conductor ring 5 rotates relative to the magnet 4, thereby generating an eddy current damping torque. The second damping component also generates a damping torque.

[0063] When the first support shaft 1 moves away from the second support shaft 2 along the axial direction, the lead screw nut 7 slides relative to the second support shaft 2, the conductor ring 5 remains stationary relative to the magnet 4 and thus does not generate eddy current damping torque, the sleeve 6 does not rotate, and the second damping assembly does not generate damping torque.

[0064] By configuring the dampers as described above, the load can only be transmitted in a single direction. When the dampers are placed at both ends of the bridge, they generate compressive force along the axial direction but not tensile force. This reduces the probability of the bridge or abutments being subjected to tensile forces, lowering the likelihood of damage to the bridge or abutments and the surrounding rock mass due to tensile stress, and thus improving the stability of the bridge.

[0065] Compared to a configuration that only allows rotation in one direction and locks in the other, when the second support shaft 2 moves away from the first support shaft 1, the second support shaft 2 slides relative to the lead screw nut 7. This configuration reduces friction between the one-way component 3 and the lead screw nut 7, and also reduces the probability of damage to the damper due to sudden changes in torque direction.

[0066] Furthermore, the second damping component is a friction-type damping component.

[0067] Furthermore, the sleeve 6 is fixedly connected to the lead screw nut 7.

[0068] Furthermore, the magnet 4 is fixedly connected to the first support shaft 1.

[0069] Furthermore, the conductor ring 5 is fixedly connected to the inner wall of the sleeve 6.

[0070] Furthermore, the one-way component 3 can be configured as a one-way clutch.

[0071] The second damping component is a friction-type damping component, which includes a first friction component 8 and a second friction component 9. The first friction component 8 is disposed on the first support shaft 1, and the second friction component 9 is disposed on the sleeve 6. The first friction component 8 abuts against the second friction component 9.

[0072] The second damping component is configured as a friction-type damping component. The first friction component 8 is disposed on the first support shaft 1, and the second friction component 9 is disposed on the sleeve 6. When the sleeve 6 rotates, the second friction component 9 disposed on the sleeve 6 rotates accordingly. By setting the first friction component 8 to abut against the second friction component 9, when the second friction component 9 rotates relative to the first friction component 8, friction is generated between the first friction component 8 and the second friction component 9, preventing the second friction component 9 from rotating relative to the first friction component 8, thereby preventing the sleeve 6 from rotating relative to the first support shaft 1.

[0073] This configuration improves the damper's vibration suppression effect on static or quasi-static vibration displacements, complementing the first damping component and enhancing the damper's ability to suppress vibration displacements of the bridge at different frequencies.

[0074] An elastic component 10 is also provided between the first support shaft 1 and the first friction component 8, with both ends of the elastic component 10 abutting against the first support shaft 1 and the first friction component 8, respectively.

[0075] By placing the elastic component 10 between the first support shaft 1 and the first friction component 8, and having both ends of the elastic component 10 abut against the first support shaft 1 and the first friction component 8 respectively, the elastic component 10 applies a preload to the first friction component 8, resulting in a large pressure between the first friction component 8 and the second friction component 9, thereby generating a large friction force.

[0076] Furthermore, the elastic component 10 is fixedly disposed between the first support shaft 1 and the first friction component 8 by bolts and nuts.

[0077] Furthermore, the elastic component 10 is configured as a disc spring assembly.

[0078] Furthermore, the disc spring assembly includes four disc springs.

[0079] The first support shaft 1 is also fitted with a support bearing 11 and a thrust bearing 12, both of which are located between the first support shaft 1 and the sleeve 6.

[0080] By setting a support bearing 11 and a thrust bearing 12 and placing them between the first support shaft 1 and the sleeve 6, when the sleeve 6 rotates, the support bearing 11 and the thrust bearing 12 can axially position the sleeve 6, improve the stability of the sleeve 6 during rotation, and enhance the damping effect of the damper.

[0081] The number of magnets 4 is 4.

[0082] By setting the number of magnets 4, the damper can be configured according to different usage requirements, thus improving the flexibility of its use.

[0083] The sleeve 6 also includes a first connector 61, and the conductor ring 5 is connected to the inner wall of the sleeve 6 through the connector.

[0084] By connecting the conductor ring 5 to the inner wall of the sleeve 6 via the first connector 61, the stability of the conductor ring 5 installation can be improved, thereby improving the reliability of the damper.

[0085] Furthermore, the conductor ring 5 is connected to the first connector 61 in a fixed manner.

[0086] The first support shaft 1 also includes a second connector 13, through which the magnet 4 is connected to the first support shaft 1.

[0087] By connecting the magnet 4 to the first support shaft 1 via the second connector 13, the stability of the magnet 4 installation can be improved, thereby improving the reliability of the damper.

[0088] Furthermore, the magnet 4 is connected to the first connector 61 in a fixed manner.

[0089] Example 2

[0090] As attached Figure 2 As shown, a combined unidirectional damper has a first support shaft 1 connected to a stiffening beam 14 and a second support shaft 2 connected to an abutment 21.

[0091] By setting the damper to generate pressure along the axial direction without generating tension, the tension on the abutment 21 is reduced, the possibility of the surrounding rock mass deteriorating due to tension is reduced, and the stability of the bridge is improved.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined unidirectional damper, characterized in that, The device includes a first support shaft (1), a second support shaft (2), a one-way component (3), a first damping component, and a second damping component. The first support shaft (1) and the second support shaft (2) are coaxially arranged. The one-way component (3) is sleeved on the second support shaft (2). The second support shaft (2) is connected to the lead screw nut (7) through the one-way component (3). The first support shaft (1) is sleeved with a sleeve (6). The sleeve (6) is fixedly connected to the lead screw nut (7). The first damping component includes a magnet (4) and a conductor ring (5). The magnet (4) and the conductor ring (5) are respectively arranged on the first support shaft (1) and the sleeve (6). When the second support shaft (2) approaches the first support shaft (1) along the axial direction, the second support shaft (2) can drive the lead screw nut (7) and the sleeve (6) to rotate around the first support shaft (1) through the one-way component (3), and the second damping component can generate a damping torque; When the second support shaft (2) moves away from the first support shaft (1) along the axial direction, the second support shaft (2) slides relative to the lead screw nut (7), while the lead screw nut (7) remains stationary and the conductor ring (5) remains stationary relative to the magnet (4).

2. The combined unidirectional damper according to claim 1, characterized in that, The second damping component is a friction damping component. The second damping component includes a first friction component (8) and a second friction component (9). The first friction component (8) is disposed on the first support shaft (1), and the second friction component (9) is disposed on the sleeve (6). The first friction component (8) abuts against the second friction component (9).

3. A combined unidirectional damper according to claim 2, characterized in that, An elastic component (10) is also provided between the first support shaft (1) and the first friction component (8), and the two ends of the elastic component (10) abut against the first support shaft (1) and the first friction component (8) respectively.

4. A combined unidirectional damper according to claim 3, characterized in that, The elastic component (10) is a disc spring assembly.

5. A combined unidirectional damper according to any one of claims 1-4, characterized in that, The first support shaft (1) is also fitted with a support bearing (11) and a thrust bearing (12), which are both located between the first support shaft (1) and the sleeve (6).

6. A combined unidirectional damper according to claim 5, characterized in that, The number of magnets (4) is at least 2.

7. A combined unidirectional damper according to claim 5, characterized in that, The sleeve (6) also includes a first connector (61), and the conductor ring (5) is connected to the inner wall of the sleeve (6) through the first connector (61).

8. A combined unidirectional damper according to claim 5, characterized in that, The first support shaft (1) further includes a second connector (13), and the magnet (4) is connected to the first support shaft (1) through the second connector (13).

9. A combined unidirectional damper according to claim 5, characterized in that, The lead screw nut (7) is a ball screw nut.

10. A combined unidirectional damper according to claim 5, characterized in that, The one-way component (3) is a one-way clutch.

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