An adjustable variable-damping variable-inertia mass damper

Abstract

The application specifically provides an adjustable variable-damping variable-inertia mass damper. The damper comprises a ball screw device, the ball screw device comprising a ball screw, a ball nut sleeved outside the ball screw, and a variable-damping device connected to the upper portion of the ball nut; the variable-damping device comprising a screw guide tube, a plurality of magnetic steels radially and uniformly arranged in a copper tube and located outside the screw guide tube, the copper tube sleeved outside the screw guide tube, and a screw guide tube sleeve sleeved outside the copper tube, the lower portion of the screw guide tube being connected to the ball nut, and the upper portion of the screw guide tube being connected to a variable-inertia mass device; the variable-inertia mass device comprising a hysteresis clutch, the output end of the hysteresis clutch being connected to a rotating flywheel through a shaft coupling, and the input end of the hysteresis clutch being connected to the upper portion of the screw guide tube. The torque generated by the ball screw device is transmitted to the variable-damping device, the rotating speed of the screw guide tube is slowed down by the variable-damping device, and the total inertia mass of the damper is changed by the variable-inertia mass device.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology for civil engineering structures, specifically providing an adjustable variable damping variable inertia mass damper. Background Technology

[0002] In the field of civil engineering, structures are often threatened by large vibrations when exposed to external factors such as strong winds, earthquakes, and waves. This can jeopardize the structure's safety and comfort, and shorten its service life. To address this, scholars both domestically and internationally have researched and developed various structural vibration control technologies, mainly categorized into passive control, active control, and semi-active control. Among these, semi-active control technology combines the advantages of both passive and active control. It requires only a minimal amount of external energy to achieve structural feedback control and can still function as a passive control system even when the external energy supply is interrupted.

[0003] However, the damping force of existing dampers is generally adjusted by controlling the applied current, and the controllability of the damping force is poor, which cannot meet the current engineering conditions. At the same time, the response speed and adjustment range of existing dampers also do not meet the requirements.

[0004] Accordingly, there is a need in the field for a new adjustable variable damping variable inertia mass damper to solve the above problems. Summary of the Invention

[0005] To overcome the above-mentioned defects, this invention is proposed to provide an adjustable variable damping variable inertia mass damper that solves or at least partially solves the technical problems of poor control of damping force, slow response speed and small adjustment range of existing dampers.

[0006] In a first aspect, the present invention provides an adjustable variable damping variable inertia mass damper, the damper comprising a ball screw assembly, a variable damping device, and a variable inertia mass device;

[0007] The ball screw assembly includes a ball screw and a ball nut sleeved on the outside of the ball screw, and a variable damping device is connected to the upper part of the ball nut;

[0008] The variable damping device includes a lead screw guide cylinder, an upper connecting part of the lead screw guide cylinder, a lower connecting part of the lead screw guide cylinder, multiple magnets, a copper tube, and a lead screw guide cylinder outer sleeve. The copper tube is sleeved on the outside of the lead screw guide cylinder, and the lead screw guide cylinder outer sleeve is sleeved on the outside of the copper tube. The multiple magnets are radially and evenly arranged inside the copper tube and located on the outside of the lead screw guide cylinder. The lower part of the lead screw guide cylinder is connected to the ball nut through the lower connecting part of the lead screw guide cylinder, and the upper part of the lead screw guide cylinder is connected to the variable inertia mass device through the upper connecting part of the lead screw guide cylinder.

[0009] The variable inertia mass device includes a hysteresis clutch, a coupling, and a rotating flywheel. The output end of the hysteresis clutch is connected to the rotating flywheel through the coupling, and the input end of the hysteresis clutch is connected to the upper connecting part of the lead screw guide.

[0010] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the damper further includes a clutch sleeve, which is sleeved outside the variable inertia mass device and detachably installed above the outer sleeve of the lead screw guide cylinder. The hysteresis clutch includes an input shaft connected to the upper connecting part of the lead screw guide cylinder, a stator, a first rotor, a second rotor, and an output shaft connected to the coupling. The stator is located inside the clutch sleeve and coaxially arranged around the input shaft. The first rotor and the second rotor are coaxially mounted sequentially from the outside to the inside of the stator. There is a gap between the first rotor and the second rotor. The stator has an excitation coil built in, and the excitation coil is connected to a power line. The current flowing through the excitation coil can be adjusted through the power line. The first rotor is provided with two stator magnetic poles, inner and outer. A cup-shaped permanent magnet of the second rotor is provided between the two stator magnetic poles. The cup-shaped permanent magnet is in an unmagnetized state before the power line is energized. The cup-shaped permanent magnet of the second rotor is fixedly installed on the output shaft. The magnetism of the cup-shaped permanent magnet changes with the magnetic field of the excitation coil.

[0011] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the hysteresis clutch further includes a magnetic ring, a fitted aluminum ring, a ball bearing, and a ball bearing mounting bracket. The magnetic ring is sleeved on the output shaft and located on the side of the cup-shaped permanent magnet near the coupling. The fitted aluminum ring is tightly sleeved on the output shaft, with one end pressed against the magnetic ring and the other end passing through the magnetic ring and abutting against the cup-shaped permanent magnet. The output shaft is mounted to the ball bearing mounting bracket via the ball bearing, and the ball bearing mounting bracket is mounted to the stator via a fixing assembly.

[0012] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the magnet is a bearing-type magnet, and the lead screw is made of magnetically conductive material.

[0013] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the outer side of the copper tube is provided with copper tube threads and copper tube threaded holes, the inner wall of the lead screw guide sleeve is provided with threads that match the copper tube threads, and the lead screw guide sleeve is provided with an adjustment port, through which the relative position of the copper tube and the lead screw guide sleeve can be adjusted, thereby changing the contact area between the magnet and the copper tube.

[0014] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the ball screw device further includes a bottom connecting ring, a first fixed bearing, a second fixed bearing, a screw nut washer, a screw nut cover, a screw nut outer sleeve, and a bolt. The screw nut outer sleeve is detachably installed to the bottom of the screw guide sleeve. The first fixed bearing is installed on the bottom inner side of the screw nut outer sleeve. The lower end of the ball screw passes through the first fixed bearing and the screw nut outer sleeve in sequence and is connected to the bottom connecting ring. The screw nut washer is detachably connected to the first fixed bearing. The bolt passes upward through the screw nut washer in sequence and is fixedly connected to the lower connecting part of the screw guide sleeve to the ball nut. The lower connecting part of the screw guide sleeve is assembled at the bottom of the screw guide sleeve outer sleeve of the variable damping device, and the lower connecting part of the screw guide sleeve is also connected to the second fixed bearing.

[0015] In one technical solution of the above-mentioned adjustable variable damping variable inertia mass damper, the lead screw guide tube passes through the second fixed bearing and is connected to the lower connecting part of the lead screw guide tube, the upper connecting part of the lead screw guide tube is connected to the upper part of the lead screw guide tube, and the input shaft of the hysteresis clutch is inserted into the upper connecting part of the lead screw guide tube and fixed.

[0016] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the number of magnets is three, and the three magnets are evenly arranged on the outer wall of the lead screw guide cylinder. The magnets are fixedly connected to the lead screw guide cylinder by magnet bolts.

[0017] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the variable inertia mass device further includes a clamping device, and the outer top of the clutch sleeve is fixedly connected to the upper connecting ring through the clamping device.

[0018] In one technical solution of the aforementioned adjustable variable damping variable inertia mass damper, the magnet and copper tube are located at the center of the entire device.

[0019] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0020] By connecting the ball screw nut of the ball screw assembly to the lower connecting part of the screw guide tube of the variable damping device, the torque generated by the ball screw assembly is transmitted to the variable damping device. Then, by incorporating multiple magnets and copper tubes into the variable damping device, the magnets rotate along with the screw guide tube. At this time, a magnetic field is formed between the magnets, and the copper tube, as a conductor in the magnetic field, generates eddy currents. These eddy currents form a loop, thus creating a reverse magnetic field opposite to the direction of the magnet's magnetic field. The interaction of these two magnetic fields generates resistance, thereby reducing the rotational speed of the magnets and slowing down the rotational speed of the screw guide tube. The lead screw guide tube is connected to the input shaft of the hysteresis clutch of the variable inertia mass device, and the output shaft of the hysteresis clutch is connected to the rotating flywheel through a coupling. This enables the rotation of the lead screw guide tube to be transmitted to the output shaft of the hysteresis clutch. By changing the output torque of the output shaft, the rotational speed of the rotating flywheel is changed, thereby changing the rotational inertia of the rotating flywheel and thus changing the total inertial mass of the damper. This achieves precise adjustment of the damping force and the total inertial command of the damper with a simple structure, avoiding the technical problems of poor damping force control, slow response speed and small adjustment range of existing dampers.

[0021] In implementing the technical solution of the present invention, by setting an adjustable connection between the copper tube and the lead screw guide sleeve, the contact area between the copper tube and the lead screw guide sleeve can be adjusted, thereby adjusting the eddy current damping.

[0022] In implementing the technical solution of this invention, the magnitude of the current supplied to the hysteresis clutch is adjusted by using the cup-shaped permanent magnet of the second rotor and the excitation coil built into the stator, thereby adjusting the magnetic field strength generated by the excitation coil, which in turn adjusts the magnetism of the cup-shaped permanent magnet, and further adjusts the torque transmission capability between the input shaft and the output shaft, thus adjusting the torque on the output shaft. Furthermore, by connecting the output shaft and the rotating flywheel through a coupling, the output torque of the output shaft can be changed by changing the magnitude of the input current, thereby changing the rotational speed of the rotating flywheel, which in turn changes the rotational inertia of the rotating flywheel, thereby changing the total inertial mass of the damper.

[0023] In implementing the technical solution of the present invention, by setting a ball screw device, the linear motion of the bottom connecting ring drives the ball nut to rotate, and then the ball nut of the ball screw device is fixedly connected to the lower connecting part of the screw guide cylinder of the variable damping device, so that the screw guide cylinder rotates, thereby realizing the transmission of the torque generated by the ball screw device to the variable damping device.

[0024] In summary, compared with traditional dampers, the present invention has the following advantages:

[0025] (1) The present invention changes the magnitude of the inertial mass coefficient by controlling the external current;

[0026] (2) The present invention changes the magnitude of the eddy current damping force by changing the vertical position of the copper tube;

[0027] (3) Compared with traditional dampers, the device of the present invention has the advantages of good adjustment performance and simple structure. Attached Figure Description

[0028] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0029] Figure 1 This is a schematic cross-sectional view of the main structure of an adjustable variable damping variable inertia mass damper according to an embodiment of the present invention.

[0030] Figure 2 This is a cross-sectional view of a portion of the structure of an adjustable variable damping variable inertia mass damper according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the main structure of the copper tube of an adjustable variable damping variable inertia mass damper according to an embodiment of the present invention.

[0032] Figure 4 This is a partial structural diagram of the lead screw guide sleeve of an adjustable variable damping variable inertia mass damper according to an embodiment of the present invention.

[0033] List of reference numerals :

[0034] 1: Bottom connecting ring; 2: Ball screw; 3: First fixed bearing; 4: Screw nut outer sleeve; 5: Screw nut washer; 6: Bolt; 7: Ball nut; 8: Lower connecting part of screw guide tube; 9: Second fixed bearing; 10: Magnet; 10A: Magnet bolt; 11: Screw guide tube; 12: Upper connecting part of screw guide tube; 13: Copper tube; 13A: Copper tube screw hole; 13B: Copper tube thread; 14: Screw guide tube outer sleeve; 14A: Adjustment port; 15: Input shaft; 16: Stator pole; 17: Power line; 18: Excitation coil; 19: First rotor; 20: Second rotor; 21: Magnetic ring; 22: Fitting aluminum ring; 23: Ball bearing; 24: Output shaft; 25: Coupling; 26: Rotating flywheel; 27: Clutch sleeve; 28: Clamping device; 29: Upper connecting ring. Detailed Implementation

[0035] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] In the description of this invention, the term "A and / or B" refers to all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and may include only A, only B, or A and B. The singular terms "a" or "this" may also include plural forms.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] The directional terms used in this article, such as "front," "front side," "front part," "rear," "rear side," and "rear part," are all based on the front-rear direction of the vehicle after the component is installed. The terms "longitudinal," "longitudinal direction," and "longitudinal section" mentioned in this article are based on the front-rear direction after the component is installed in the vehicle, while "transverse," "lateral," and "cross section" indicate the direction perpendicular to the longitudinal direction.

[0042] See appendix Figure 1 , Figure 1 This is a schematic cross-sectional view of the main structure of an adjustable variable damping variable inertia mass damper according to an embodiment of the present invention. Figure 1 As shown, the adjustable variable damping variable inertia mass damper in this embodiment of the invention mainly includes a ball screw device, a variable damping device, and a variable inertia mass device.

[0043] The ball screw assembly includes a ball screw 2 and a ball nut 7 sleeved on the outside of the ball screw 2. A variable damping device is connected to the upper part of the ball nut 7.

[0044] The variable damping device includes a lead screw guide cylinder 11, an upper connecting part 12 of the lead screw guide cylinder, a lower connecting part 8 of the lead screw guide cylinder, multiple magnets 10, a copper tube 13, and a lead screw guide cylinder outer sleeve 14. The copper tube 13 is sleeved on the outside of the lead screw guide cylinder 11, and the lead screw guide cylinder outer sleeve 14 is sleeved on the outside of the copper tube 13. The multiple magnets 10 are radially and evenly arranged inside the copper tube 13 and located on the outside of the lead screw guide cylinder 11. The lower part of the lead screw guide cylinder 11 is connected to the ball nut 7 through the lower connecting part 8 of the lead screw guide cylinder, and the upper part of the lead screw guide cylinder 11 is connected to the variable inertia mass device through the upper connecting part 12 of the lead screw guide cylinder.

[0045] The variable inertia mass device includes a hysteresis clutch, a coupling 25, and a rotating flywheel 26. The output end of the hysteresis clutch is connected to the rotating flywheel 26 through the coupling 25, and the input end of the hysteresis clutch is connected to the connecting part 12 on the lead screw guide.

[0046] Specifically, in some embodiments, the outer surface of the ball screw 2 is provided with threads, the inner surface of the ball nut 7 is provided with threads that match the threads of the ball screw 2, and a plurality of balls that match the threads are provided between the two threads, so as to reduce friction between the ball nut 7 and the ball threads and achieve smooth rotational movement.

[0047] Specifically, in some embodiments, the number of magnets 10 is three, and the three magnets 10 are evenly arranged on the outer wall of the lead screw guide cylinder 11. The magnets 10 and the lead screw guide cylinder 11 are fixedly connected by magnet bolts 10A.

[0048] In the above embodiment, by fixing the ball screw nut 7 of the ball screw device to the lower connecting part 8 of the screw guide cylinder of the variable damping device, the torque generated by the ball screw device is transmitted to the variable damping device. Furthermore, by setting multiple magnets 10 and copper tubes 13 in the variable damping device, when the screw guide cylinder 11 rotates, the multiple magnets 10 begin to rotate accordingly. At this time, a magnetic field is formed between the magnets 10, and the copper tube, as a conductor in the magnetic field, forms eddy currents. These eddy currents form a loop, thereby forming a reverse magnetic field opposite to the magnetic field of the magnets 10. The interaction of the two magnetic fields generates resistance, thereby reducing the rotational speed of the magnets 10 and thus slowing down the rotational speed of the screw guide cylinder 11. By connecting the lead screw guide cylinder 11 to the input shaft 15 of the hysteresis clutch of the variable inertia mass device, and connecting the output shaft 24 of the hysteresis clutch to the rotating flywheel 26 via the coupling 25, the rotation of the lead screw guide cylinder 11 is transmitted to the output shaft 24 of the hysteresis clutch. This allows for a change in the output torque of the output shaft 24, which in turn changes the rotational speed of the rotating flywheel 26, thereby altering its rotational inertia and ultimately the total inertial mass of the damper. This achieves precise adjustment of the damping force and the total inertial command of the damper with a simple structure, avoiding the technical problems of existing dampers such as poor damping force control, slow response speed, and small adjustment range.

[0049] Specifically, in some embodiments, the damper further includes a clutch sleeve 27, which is sleeved outside the variable inertia mass device and detachably mounted above the lead screw guide sleeve 14. The hysteresis clutch includes an input shaft 15 connected to the lead screw guide 11, a stator 16, a first rotor 19, a second rotor 20, and an output shaft 24 connected to the coupling 25. The stator 16 is located inside the clutch sleeve 27 and coaxially arranged around the input shaft 15. The first rotor 19 and the second rotor 20 are coaxially mounted on the inner side of the stator 16 from the outside to the inside. There is a gap between the first rotor 19 and the second rotor 20. The stator 16 has an excitation coil 18 built in it. The excitation coil 18 is connected to a power line 17. The current flowing through the excitation coil 18 can be adjusted through the power line 17. The first rotor 19 is provided with two stator magnetic poles, inner and outer. The cup-shaped permanent magnet of the second rotor 20 is provided between the two stator magnetic poles. The cup-shaped permanent magnet is in an unmagnetized state before the power line 17 is energized. The cup-shaped permanent magnet of the second rotor 20 is fixedly installed on the output shaft 24. The magnetism of the cup-shaped permanent magnet changes with the magnetic field of the excitation coil 18.

[0050] Before the power line 17 is energized, the cup-shaped permanent magnet is in an unmagnetized state. By setting the cup-shaped permanent magnet, which is not energized before the power line 17 is energized, the magnetism of the cup-shaped permanent magnet changes after the power line 17 is energized, so that a magnetic connection is established between the first rotor 19 and the second rotor 20. This allows the rotational force of the input shaft 15 to be transmitted to the output shaft 24 through the magnetic connection, thus realizing the mechanical coupling between the input shaft 15 and the output shaft 24.

[0051] Specifically, in some embodiments, the hysteresis clutch further includes a magnetic ring 21, a fitted aluminum ring 22, a ball bearing 23, and a ball bearing mounting bracket. The magnetic ring 21 is sleeved on the output shaft 24 and located on the side of the cup-shaped permanent magnet near the coupling 25. The magnetic ring 21 is used to protect and position the cup-shaped permanent magnet, thereby ensuring the stable and correct formation of the magnetic field. The fitted aluminum ring 22 is tightly sleeved on the output shaft 24. One end of the fitted aluminum ring 22 is pressed against the magnetic ring 21, and the other end passes through the magnetic ring 21 and abuts against the cup-shaped permanent magnet. The fitted aluminum ring 22 is used to enhance the positioning and stability of the cup-shaped permanent magnet, thereby ensuring the correct alignment of the second rotor 20 and other components. The output shaft 24 is mounted to the ball bearing mounting bracket via the ball bearing 23. The ball bearing mounting bracket is mounted to the stator 16 via fixing components such as bolts and screws. The ball bearing 23 is used to reduce friction and ensure smooth rotational movement, thereby ensuring that the rotor rotation is smooth and efficient.

[0052] In the above embodiment, the magnitude of the current supplied to the hysteresis clutch is adjusted by the cup-shaped permanent magnet of the second rotor 20 and the excitation coil 18 built into the stator 16, thereby adjusting the magnetic field strength generated by the excitation coil 18, which in turn adjusts the magnetism of the cup-shaped permanent magnet, thereby adjusting the torque transmission capability between the input shaft 15 and the output shaft 24, and adjusting the torque on the output shaft 24. Furthermore, the output shaft 24 and the rotating flywheel 26 are connected by a coupling 25, so that the output torque of the output shaft 24 can be changed by changing the magnitude of the input current, thereby changing the rotational speed of the rotating flywheel 26, changing the rotational inertia of the rotating flywheel 26, and thus changing the total inertial mass of the damper.

[0053] Furthermore, in some embodiments, the magnet is a bearing-type magnet, evenly arranged on the outer wall of the lead screw guide cylinder and fixed by bolts, and the lead screw guide cylinder is made of a magnetically conductive material. In this embodiment, the lead screw guide cylinder is made of a magnetically conductive material, which can improve the magnetic induction intensity, enhance the damping effect, and suppress magnetic field leakage.

[0054] See appendix Figure 2 To be continued Figure 4Specifically, in some embodiments, the copper tube 13 and the lead screw guide sleeve 14 are adjustable devices. The outer side of the copper tube 13 is provided with a copper tube thread 13B and a copper tube threaded hole 13A. The inner wall of the lead screw guide sleeve 14 is provided with a thread that matches the copper tube thread 13B. The lead screw guide sleeve 14 is also provided with an adjustment port 14A. The relative position of the copper tube 13 and the lead screw guide sleeve 14 can be adjusted through the adjustment port 14A, thereby changing the contact area between the magnet 10 and the copper tube 13. By rotating, the contact area between the magnet and the copper tube is changed to adjust the magnitude of the eddy current damping force of the variable damping device, thereby achieving the purpose of adjustable damping.

[0055] In the above embodiment, by setting an adjustable connection between the copper tube 13 and the lead screw guide sleeve 14, the contact area between the copper tube 13 and the lead screw guide sleeve 14 can be adjusted, thereby adjusting the eddy current damping.

[0056] Specifically, in some embodiments, the ball screw device further includes a bottom connecting ring 1, a first fixed bearing 3, a second fixed bearing 9, a screw nut washer 5, a screw nut cover, a screw nut outer sleeve 4, and a bolt 6. The screw nut outer sleeve 4 is detachably installed to the bottom of the screw guide sleeve 14. The first fixed bearing 3 is installed on the bottom inner side of the screw nut outer sleeve 4. The lower end of the ball screw 2 passes through the first fixed bearing 3 and the screw nut outer sleeve 4 in sequence and is connected to the bottom connecting ring 1. The screw nut washer 5 is detachably connected to the first fixed bearing 3. The bolt 6 passes upward through the screw nut washer 5 in sequence and is fixedly connected to the lower connecting part 8 of the screw guide sleeve with the ball nut 7. The lower connecting part 8 of the screw guide sleeve is assembled at the bottom of the screw guide sleeve 14 of the variable damping device. The lower connecting part 8 of the screw guide sleeve is also connected to the second fixed bearing 9.

[0057] Specifically, in some embodiments, the lead screw guide cylinder 11 passes through the second fixed bearing 9 and is connected to the lower connecting part 8 of the lead screw guide cylinder, the upper connecting part 12 of the lead screw guide cylinder is connected to the upper part of the lead screw guide cylinder 11, and the input shaft 15 of the hysteresis clutch is inserted into the upper connecting part 12 of the lead screw guide cylinder and fixed.

[0058] Furthermore, in some embodiments, the lead screw guide cylinder and the lead screw guide cylinder outer sleeve 14 are connected by a second fixed bearing 9.

[0059] Furthermore, in some embodiments, the ball screw device further includes a nut sleeve 4 sleeved on the outside of the ball nut 7, the nut sleeve 4 being connected to the ball nut 7 via a first fixed bearing 3.

[0060] Specifically, in some embodiments, the variable inertia mass device further includes a clamping device 28, and the outer top of the clutch sleeve 27 is fixedly connected to the upper connecting ring 29 through the clamping device 28.

[0061] Furthermore, in some embodiments, the lead screw nut washer 5, the ball nut 7, and the lead screw guide tube are fixedly connected by bolts 6 so that the lead screw guide tube rotates as the ball nut 7 rotates.

[0062] In the above embodiment, by setting a ball screw device, the linear motion of the bottom connecting ring 1 drives the ball nut 7 to rotate. Then, the ball nut 7 of the ball screw device is fixedly connected to the lower connecting part 8 of the screw guide cylinder of the variable damping device, so that the screw guide cylinder 11 rotates, thereby realizing the transmission of the torque generated by the ball screw device to the variable damping device.

[0063] Furthermore, in some embodiments, when the two ends of the ball screw device are relatively displaced, the bottom connecting ring 1 moves up and down in a straight line and drives the ball screw 2 to move up and down in a straight line. Since the ball screw 2 has threads on the outside, the ball nut 7 rotates. The rotation of the ball nut 7 drives the screw nut washer 5 and the screw guide cylinder 11 to rotate together through the bolt 6. In turn, the screw guide cylinder 11 rotates, thus realizing the transmission of the torque generated by the ball screw device to the variable damping device.

[0064] When the lead screw guide cylinder 11 rotates, the multiple magnets 10 located outside the lead screw guide cylinder 11 also rotate. Since a magnetic field is formed inside the multiple magnets 10, the direction of this magnetic field changes relative to the region inside the copper tube 13 when the magnets 10 rotate. This changing magnetic field generates a change in magnetic flux within the copper tube 13. According to Faraday's law of electromagnetic induction, when the magnetic flux changes within a conductor, eddy currents are generated to resist this change. In this case, the copper tube 13 acts as a conductor. Due to the change in magnetic flux, eddy currents are generated within the copper tube 13. These eddy currents form closed loops, and their direction attempts to generate a magnetic field opposite to that generated by the rotation of the magnets 10. When eddy currents are generated, they flow along the inside of the copper tube 13, which causes resistance heat to be generated inside the copper material. This is because eddy currents lose energy when passing through resistive materials, converting mechanical energy into heat energy. This additional heat causes the copper tube to heat up. The reverse magnetic field generated by the eddy current interacts with the rotational motion of the magnet 10. The interaction of the two magnetic fields creates resistance, which reduces the rotational speed of the magnet 10, thereby slowing down the movement of the lead screw guide cylinder 11. The connecting part 12 on the lead screw guide cylinder is connected to the input shaft 15 of the hysteresis clutch of the variable inertia mass device, realizing that the torque generated by the ball screw device is transmitted to the variable inertia mass device after being reduced by the variable damping device.

[0065] The input shaft 15 is the driving part of the hysteresis clutch. It is connected to the connecting part 12 on the lead screw guide tube of the external drive source and provides power through rotation. The input shaft 15 is connected to the lead screw guide tube 11, so that the lead screw guide tube 11 drives the input shaft 15 to rotate. When the power line 17 is energized, the excitation coil 18 is activated by the current, so that the excitation coil 18 forms a magnetic field. The first rotor 19 starts to rotate, so that the stator magnetic pole 16 generates a rotating magnetic field. This rotating magnetic field affects the cup-shaped permanent magnet of the second rotor 20, realizing the magnetization of the cup-shaped permanent magnet, thereby establishing a magnetic connection between the first rotor 19 and the second rotor 20. The rotational force of the input shaft 15 is transmitted to the output shaft 24 through the magnetic connection, realizing the mechanical coupling between the input shaft 15 and the output shaft 24. Specifically, in the initial state of the hysteresis clutch, the cup-shaped permanent magnet of the second rotor 20 is not yet magnetized, so it has no magnetism. When the external power line 17 is energized, the excitation coil 18 is activated by the current. The excitation coil 18 generates a magnetic field, and the first rotor 19 starts to rotate. Because the first rotor 19 has two stator magnetic poles 16, one inside and one outside, its rotation causes the poles to generate a rotating magnetic field in the gap. This rotating magnetic field simultaneously affects the cup-shaped permanent magnet inside the second rotor 20. Although the cup-shaped permanent magnet is not yet magnetized, its magnetism begins to gradually change due to hysteresis, following the changes in the rotating magnetic field. Due to hysteresis, the change in the permanent magnet's magnetism lags behind the change in the magnetic poles. This results in a magnetic connection being established between the first rotor 19 and the second rotor 20. Although the change in the permanent magnet's magnetism does not immediately follow the change in the magnetic field, it eventually becomes fully magnetized and interacts with the magnetic poles of the first rotor 19. Once the magnetic connection is established, torque can be transmitted from the first rotor 19 to the second rotor 20. This means that the rotational power of the input shaft 15 is transmitted to the output shaft 24 through the magnetic connection, achieving mechanical coupling.

[0066] Increasing the current supplied to the hysteresis clutch will increase the magnetic field strength generated by the excitation coil 18, thereby increasing the magnetism of the permanent magnet. This will enhance the strength of the magnetic connection, thus increasing the torque transmission capability and resulting in an increase in torque on the output shaft 24. Conversely, decreasing the current supplied to the hysteresis clutch will decrease the magnetic field strength generated by the excitation coil, resulting in a decrease in the magnetism of the permanent magnet. This will reduce the strength of the magnetic connection, thereby reducing the torque transmission capability and resulting in a decrease in torque on the output shaft 24. Therefore, by increasing or decreasing the current supplied to the hysteresis clutch, the magnetic field strength generated by the excitation coil 18 can be increased or decreased, thereby increasing or decreasing the magnetism of the cup-shaped permanent magnet, and consequently increasing or decreasing the torque transmission capacity between the input shaft 15 and the output shaft 24, thus increasing or decreasing the torque on the output shaft 24. The output shaft 24 and the rotating flywheel 26 are connected by a coupling 25, which allows the output torque of the output shaft 24 to be changed by altering the input current, thereby changing the rotational speed of the rotating flywheel 26. A higher rotational speed increases the rotational inertia of the rotating flywheel 26, thus increasing the total inertial mass of the damper; conversely, a lower rotational speed decreases the rotational inertia, reducing the total inertial mass of the damper. When the input current reaches its peak, the output shaft 24 rotates synchronously with the input shaft 15, and the mass flywheel 26 connected by the coupling 25 rotates together.

[0067] Specifically, in some embodiments, the upper connecting part 12, the lead screw guide tube 11, and the lower connecting part 8 of the lead screw guide tube are connected end to end, and the upper connecting part 12, the lead screw guide tube 11, and the lower connecting part 8 of the lead screw guide tube are integrally formed.

[0068] Specifically, in some embodiments, the magnet 10 and the copper tube 13 are located at the center of the entire device. In this embodiment, this arrangement achieves two objectives: firstly, it increases the power of the damper while preventing magnetic field leakage; secondly, it better protects the magnet assembly and the copper tube 13.

[0069] The adjustable variable damping variable inertia mass damper of the present invention has a lower ball screw device that converts the linear displacement at both ends of the damper into rotational motion, which is then transmitted to the middle variable damping system through the screw guide tube. The magnitude of the eddy current damping is changed by adjusting the contact area between the copper tube and the magnet, and then transmitted to the upper variable inertia mass device. By adjusting the input current of the hysteresis clutch of the variable inertia mass device, the magnitude of the inertia mass coefficient can be changed.

[0070] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0071] The aforementioned adjustable variable damping variable inertia mass damper is used to perform the above embodiments. The technical principles, the technical problems solved, and the technical effects produced by both are similar. Those skilled in the art can clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the adjustable variable damping variable inertia mass damper can be referred to the content described in the above embodiments, and will not be repeated here.

[0072] Those skilled in the art will understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules will not cause the technical solution to deviate from the principles of the present invention; therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

[0073] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An adjustable variable-damper variable-inertia mass damper, characterized by, The damper comprises a ball screw device, a variable damping device and a variable inertia mass device; The ball screw device comprises a ball screw, a ball nut sleeved outside the ball screw, and a variable damping device connected to the upper part of the ball nut; The variable damping device comprises a screw guide tube, an upper connecting part of the screw guide tube, a lower connecting part of the screw guide tube, a plurality of magnetic steels, a copper pipe, and a screw guide tube sleeve, the copper pipe is sleeved outside the screw guide tube, the screw guide tube sleeve is sleeved outside the copper pipe, the plurality of magnetic steels are radially and uniformly arranged in the copper pipe and located on the outside of the screw guide tube, the lower part of the screw guide tube is connected to the ball nut through the lower connecting part of the screw guide tube, and the upper part of the screw guide tube is connected to the variable inertia mass device through the upper connecting part of the screw guide tube; The outside of the copper pipe is provided with a copper pipe thread and a copper pipe screw hole, the inner wall of the screw guide tube sleeve is provided with a thread matched with the copper pipe thread, and an adjusting opening is arranged on the screw guide tube sleeve, the relative position of the copper pipe and the screw guide tube sleeve can be adjusted through the adjusting opening, and the contact area of the magnetic steel and the copper pipe is changed. The variable inertia mass device comprises a hysteresis clutch, a shaft coupling, and a rotating flywheel, the output end of the hysteresis clutch is connected to the rotating flywheel through the shaft coupling, and the input end of the hysteresis clutch is connected to the upper connecting part of the screw guide tube; The damper further comprises a clutch sleeve, the clutch sleeve is sleeved outside the variable inertia mass device and detachably mounted above the screw guide tube sleeve, the hysteresis clutch comprises an input shaft connected to the upper connecting part of the screw guide tube, a stator, a first rotor, a second rotor, and an output shaft connected to the shaft coupling, the stator is located inside the clutch sleeve and coaxially arranged around the input shaft, the first rotor and the second rotor are coaxially installed in the stator from outside to inside, a gap exists between the first rotor and the second rotor, the stator is built-in with an excitation coil, the excitation coil is connected with a power line, the current flowing through the excitation coil can be adjusted through the power line, the first rotor is provided with inner and outer stator magnetic poles, a cup-shaped permanent magnet of the second rotor is arranged between the inner and outer stator magnetic poles, the cup-shaped permanent magnet of the second rotor is fixedly installed on the output shaft, and the magnetism of the cup-shaped permanent magnet changes with the change of the magnetic field of the excitation coil. The hysteresis clutch further comprises a magnetic ring, a tightly-fitted aluminum ring, a ball bearing, and a ball bearing mounting bracket, the magnetic ring is sleeved on the output shaft and located on the side of the cup-shaped permanent magnet close to the shaft coupling, the tightly-fitted aluminum ring is tightly sleeved on the output shaft, one end of the tightly-fitted aluminum ring is press-bonded on the magnetic ring, and the other end penetrates through the magnetic ring and abuts against the cup-shaped permanent magnet; the output shaft is mounted on the ball bearing mounting bracket through the ball bearing, and the ball bearing mounting bracket is mounted on the stator through a fixing assembly.

2. The adjustable variable-damper variable-inertia mass damper of claim 1, wherein, The magnetic steel is a bearing shell type magnet, and the screw guide tube is made of a magnetic conductive material.

3. The adjustable variable-damper variable-inertia mass damper of claim 1, wherein, The ball screw device further comprises a bottom connecting ring, a first fixed bearing, a second fixed bearing, a screw nut gasket, a screw nut upper cover, a screw nut outer sleeve, and a bolt, the screw nut outer sleeve is detachably installed at the bottom of the screw guide sleeve outer sleeve, the first fixed bearing is installed at the inner bottom of the screw nut outer sleeve, the lower end of the ball screw passes through the first fixed bearing and the screw nut outer sleeve in sequence and is connected with the bottom connecting ring, the screw nut gasket is detachably connected to the first fixed bearing, the bolt passes through the screw nut gasket in sequence and is fixedly connected with the ball nut and the screw guide sleeve lower connecting part, the screw guide sleeve lower connecting part is assembled at the bottom of the screw guide sleeve outer sleeve of the variable damping device, and the screw guide sleeve lower connecting part is connected with the second fixed bearing.

4. The adjustable variable-damper variable-inertia mass damper of claim 3, wherein, Wherein, The screw guide sleeve is connected with the screw guide sleeve lower connecting part through the second fixed bearing, the screw guide sleeve upper connecting part is connected with the upper part of the screw guide sleeve, and the input shaft of the hysteresis clutch is inserted into the screw guide sleeve upper connecting part and is fixed.

5. The adjustable variable-damper, variable-inertia mass damper of claim 1, wherein, The number of the magnetic steels is three, and the three magnetic steels are uniformly arranged on the outer wall of the screw guide sleeve and are fixedly connected with the screw guide sleeve through magnetic steel bolts.

6. The adjustable variable-damper, variable-inertia mass damper of claim 1, wherein, The variable inertia mass device further comprises a clamping device, and the outer top of the clutch sleeve is fixedly connected with the upper connecting ring through the clamping device.

7. The adjustable variable-damper, variable-inertia mass damper of claim 1, wherein, The magnetic steel and the copper pipe are located at the center of the whole device.

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