An adjustable magnetic damping shock absorber

Abstract

The application discloses an adjustable magnetic damping shock absorber and relates to the technical field of shock absorption. A load platform is used for bearing a vibration target object, a base platform is used for being connected with an excitation table, and the load platform and the base platform are oppositely arranged. An intermediate magnet is located between the load platform and the base platform, and the intermediate magnet is oppositely fixed with the load platform. Two magnetic variable dampers are located between the load platform and the base platform, and the two magnetic variable dampers are respectively located on two sides of the intermediate magnet. The distance between the two magnetic variable dampers can be adjusted. Each magnetic variable damper comprises a magnet group, each magnet group comprises a plurality of magnets, the distance between the magnets in the magnet group can be adjusted, and each magnet group is arranged close to the intermediate magnet. One end of each stiffness spring rod is slidably connected with the load platform, and the other end of each stiffness spring rod is oppositely fixed with the load platform. The application realizes the adjustability of the magnetic damping, has flexibility and diversity, and has a large application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration reduction, in particular to an adjustable magnetic damping vibration reducer. BACKGROUND

[0002] Vibration is a common phenomenon that can be harmful and can cause a series of adverse effects when the machine is working normally. In order to eliminate this adverse effect, a vibration reducer is often installed on the mechanical device to eliminate or offset the vibration. Damping is an important and common device parameter in the damping device, and the presence of damping can significantly attenuate the resonance peak of the object at the resonance frequency. The damping device generally has the forms of hydraulic damping, magnetorheological fluid, and magnet damping device.

[0003] The magnetic damping device currently applied to the damping device is basically a magnet group fixed on the device, which cooperates with other magnets on the device to give damping in the working direction, but because of its fixed structure, it is not flexible and the damping parameter cannot be adjusted, and the size of the magnetic damping cannot be adjusted in real time, so as to achieve different damping effects. SUMMARY

[0004] The purpose of the present application is to provide an adjustable magnetic damping vibration reducer, which realizes the adjustability of magnetic damping, has flexibility and versatility, and has a wide range of applications.

[0005] To achieve the above purpose, the present application provides the following scheme:

[0006] The present application provides an adjustable magnetic damping vibration reducer, which comprises a load platform, a base platform, a plurality of stiffness spring rods, two magnetic variable dampers and an intermediate magnet.

[0007] The load platform is used for carrying the vibration target object, the base platform is used for connecting with the excitation table, and the load platform and the base platform are oppositely arranged.

[0008] The intermediate magnet is located between the load platform and the base platform, and the intermediate magnet is fixed opposite to the load platform.

[0009] The two magnetic variable dampers are located between the load platform and the base platform, and the two magnetic variable dampers are located on the two sides of the intermediate magnet, respectively. The distance between the two magnetic variable dampers can be adjusted. Each magnetic variable damper comprises a magnet group, each magnet group comprises a plurality of magnets, the distance between each magnet in the magnet group can be adjusted, and each magnet group is arranged close to the intermediate magnet.

[0010] One end of each stiffness spring rod is in sliding connection with the load platform, and the other end of each stiffness spring rod is fixed opposite to the load platform.

[0011] Preferably, the magnetic variable damper further comprises a sliding plate, a position adjusting structure, a distance adjusting structure and a bearing plate, one end of the sliding plate is in sliding connection with a support plate, the support plate is located between the load platform and the base platform, the other end of the sliding plate is in sliding connection with the base platform, the position adjusting structure is arranged on the sliding plate, the bearing plate is used for bearing the magnet groups, the distance adjusting structure is arranged on the bearing plate, the position adjusting structure can adjust the relative position of the bearing plate and the sliding plate, and the distance adjusting structure can adjust the distance between the magnets in each magnet group.

[0012] Preferably, the position adjusting structure comprises a first pulley, a second pulley, a third pulley, a fourth pulley, a worm gear, a worm, a guide rope and two connecting pieces, the first pulley, the second pulley, the third pulley and the fourth pulley are respectively located at four corners of the sliding plate, the worm gear is in engagement with the worm, the worm gear is coaxially arranged with a sliding rod, the sliding rod is in sliding connection with the sliding plate, the guide rope is closed arrangement, the guide rope is sequentially wound around the first pulley, the third pulley, the second pulley, the fourth pulley and the sliding rod, and the two connecting pieces are both connected with the bearing plate, one connecting piece is connected with the guide rope between the first pulley and the third pulley, and the other connecting piece is connected with the guide rope between the second pulley and the fourth pulley.

[0013] Preferably, both ends of the sliding plate are provided with sliding blocks, the sliding blocks are provided with rollers, one end of the sliding block is in sliding connection with a first sliding groove of the support plate, and the roller at one end is located in a first pulley groove of the support plate, the other end of the sliding block is in sliding connection with a second sliding groove of the base platform, and the roller at the other end is located in a second pulley groove of the base platform.

[0014] Preferably, one end of the worm is in rotational connection with a fixing sleeve on the sliding plate, and the other end of the worm is provided with a handle.

[0015] Preferably, each of the magnet groups comprises three magnets, the three magnets are a first magnet, a second magnet and a third magnet from top to bottom, the first magnet, the second magnet and the third magnet are slidably connected with the bearing plate, a reset spring is arranged between the first magnet and the second magnet and between the second magnet and the third magnet, the distance adjusting structure comprises a fifth pulley, a sixth pulley, a first guide shaft, a second guide shaft and a sliding cable, the fifth pulley, the sixth pulley, the first guide shaft and the second guide shaft are arranged on the bearing plate, one end of the sliding cable is connected with the first magnet, the other end of the sliding cable is connected with the second magnet, the first guide shaft is located between the first magnet and the second magnet, the second guide shaft is located between the second magnet and the third magnet, the first guide shaft and the second guide shaft are rotatably connected with the bearing plate, and the sliding cable sequentially passes through the first guide shaft, the fifth pulley, the sixth pulley and the second guide shaft.

[0016] Preferably, two pulley limiters are further arranged on the bearing plate, one end of each of the pulley limiters is connected with the bearing plate, and the other end of the pulley limiter can extend into a limiting slot of the fifth pulley or the sixth pulley.

[0017] Preferably, the S-pole of the intermediate magnet is close to the load platform, the N-pole of the intermediate magnet is close to the base platform, the N-pole of each of the magnets of one magnet group is close to the intermediate magnet, and the S-pole of each of the magnets of the other magnet group is close to the intermediate magnet.

[0018] Preferably, the rigidity spring rod comprises a guide rod, a first spring seat, two second spring seats, two springs and a protrusion, the first spring seat and the two second spring seats are slidably connected with the guide rod, the first spring seat is located at one end of the guide rod and is used for being connected with the magnet, the two second spring seats are respectively located at the middle part of the guide rod and the other end of the guide rod, the protrusion is located at the other end of the guide rod, the two springs are sleeved on the guide rod, one of the springs is located between the first spring seat and the second spring seat in the middle part, and the other spring is located between the two second spring seats, one end of the guide rod penetrates through the load platform, and the protrusion is threadedly connected with the base platform.

[0019] Preferably, each of the first spring seats is connected with a magnet arm through a connecting arm, and the magnet arm is fixed opposite to the load platform and the intermediate magnet.

[0020] The present application has the following technical effects relative to the prior art:

[0021] The adjustable magnetic damping shock absorber can change the damping of the shock absorber in two ways. The first way is to change the distance between the magnet group and the middle magnet to change the magnetic force between the magnets; the second way is to change the distance between each magnet in the magnet group, that is, to change the degree of mutual attraction and repulsion of each magnet in the magnet group. Through these two methods of changing the distance parameters, the magnetic damping of the adjustable magnetic damping shock absorber can be adjusted and the damping effect can be changed, so that the system can be more flexible and adapt to a wider working environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a perspective view of the adjustable magnetic damping shock absorber of the present application;

[0024] Figure 2 is a front view of the adjustable magnetic damping shock absorber of the present application;

[0025] Figure 3 is a top view of the adjustable magnetic damping shock absorber of the present application;

[0026] Figure 4 is a perspective view of the magnetic variable damper of the present application Figure 1 ;

[0027] Figure 5 is a perspective view of the magnetic variable damper of the present application Figure 2 ;

[0028] Figure 6 is a side view of the magnetic variable damper of the present application Figure 2 ;

[0029] Figure 7 is a side view of the magnetic variable damper of the present application Figure 2 ;

[0030] Figure 8 is an axial view of the stiffness spring rod of the present application;

[0031] Figure 9 is a top view of the base platform of the present application;

[0032] Figure 10 is a schematic diagram of the first way of adjusting the magnetic damping of the present application;

[0033] Figure 11 is a schematic diagram of the second way of adjusting the magnetic damping of the present application;

[0034] Figure 12 The vibration transmission rate effect diagram of the adjustable magnetic damping shock absorber of the present application;

[0035] Figure 13 The vibration time domain effect diagram of the adjustable magnetic damping shock absorber of the present application;

[0036] 100-adjustable magnetic damping shock absorber;

[0037] 1-magnetic variable damper, 101-sliding plate, 102-bearing plate, 103-first pulley, 104-second pulley, 105-third pulley, 106-fourth pulley, 107-worm gear, 108-worm, 109-guide cable, 110-connector, 111-sliding block, 112-roller, 113-fixing sleeve, 114-handle, 115-fixing device, 116-first magnet, 117-second magnet, 118-third magnet, 119-return spring, 120-fifth pulley, 121-sixth pulley, 122-first guide shaft, 123-second guide shaft, 124-slip cable, 125-pulley limiter, 126-magnet group;

[0038] 2-rigidity spring rod, 201-guide rod, 202-first spring seat, 203-second spring seat, 204-spring, 205-bump;

[0039] 3-base platform, 301-first sliding groove, 302-first pulley groove, 303-limiting block;

[0040] 4-load platform, 401-load plate, 402-connecting arm, 403-magnet arm, 404-connecting arm groove;

[0041] 5-supporting plate;

[0042] 6-intermediate magnet. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0044] The present application aims to provide an adjustable magnetic damping shock absorber, which realizes the adjustability of magnetic damping, has flexible diversity, and has a large applicable range.

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0046] As Figures 1 to 9 shown: the embodiment provides an adjustable magnetic damping shock absorber 100, including a load platform 4, a base platform 3, a plurality of stiffness spring rods 2, two magnetic variable dampers 1 and an intermediate magnet 6; the load platform 4 is used to carry the vibration target object, which can be fixed by clamps, pasting and the like, the base platform 3 is used to connect with the excitation table, which can be fixed by clamps, bolts, pasting and the like, the load platform 4 and the base platform 3 are oppositely arranged; the intermediate magnet 6 is located between the load platform 4 and the base platform 3, and the intermediate magnet 6 is fixed relative to the load platform 4; the two magnetic variable dampers 1 are located between the load platform 4 and the base platform 3, and the two magnetic variable dampers 1 are located on both sides of the intermediate magnet 6, the distance between the two magnetic variable dampers 1 can be adjusted, each magnetic variable damper 1 includes a magnet group 126, each magnet group 126 includes a plurality of magnets, the distance between each magnet in the magnet group 126 can be adjusted, each magnet group 126 is arranged close to the intermediate magnet 6, and the intermediate magnet 6 can interact with the magnet group 126 of the magnetic variable damper 1, that is, a magnetic damping effect is generated, thereby hindering the up and down displacement of the load platform 4, that is, eliminating vibration; one end of each stiffness spring rod 2 is slidably connected with the load platform 4, and the other end of each stiffness spring rod 2 is fixed relative to the load platform 4.

[0047] Specifically, in the embodiment, the magnetic variable damper 1 further includes a sliding plate 101, a position adjusting structure, a distance adjusting structure and a bearing plate 102, one end of the sliding plate 101 is slidably connected with a support plate 5, the support plate 5 is located between the load platform 4 and the base platform 3, the magnet arm 403 of the intermediate magnet 6 passes through the support plate 5 without contacting the support plate 5, the other end of the sliding plate 101 is slidably connected with the base platform 3, the position adjusting structure is arranged on the sliding plate 101, the bearing plate 102 is used to bear the magnet group 126, the distance adjusting structure is arranged on the bearing plate 102, the position adjusting structure can adjust the relative position of the bearing plate 102 and the sliding plate 101, and the distance adjusting structure can adjust the distance between each magnet in each magnet group 126.

[0048] In the embodiment, the position adjusting structure comprises a first pulley 103, a second pulley 104, a third pulley 105, a fourth pulley 106, a worm wheel 107, a worm gear 108, a guide rope 109 and two connecting pieces 110. The first pulley 103, the second pulley 104, the third pulley 105 and the fourth pulley 106 are respectively located at four corners of the sliding plate 101. The first pulley 103 and the second pulley 104 are oppositely arranged, and the third pulley 105 and the fourth pulley 106 are oppositely arranged. The first pulley 103 is arranged above the third pulley 105, and the second pulley 104 is arranged above the fourth pulley 106. The worm wheel 107 is engaged with the worm gear 108. One end of the worm gear 108 is rotationally connected with a fixed sleeve 113 on the sliding plate 101, and the fixed sleeve 113 limits the worm gear 108. The other end of the worm gear 108 is provided with a handle 114. The sliding plate 101 is further provided with a fixer 115, so that the worm gear 108 can be horizontally placed and freely rotated. The worm wheel 107 is coaxially arranged with a sliding rod, and the sliding rod is slidingly connected with the sliding plate 101. The guide rope 109 is closed. The first pulley 103, the third pulley 105, the second pulley 104 and the fourth pulley 106 provide sliding fulcrums for the guide rope 109. The guide rope 109 passes the first pulley 103, the third pulley 105, the second pulley 104, the fourth pulley 106 and the sliding rod in sequence. The two connecting pieces 110 are connected with the bearing plate 102. One connecting piece 110 is connected with the guide rope 109 between the first pulley 103 and the third pulley 105, and the other connecting piece 110 is connected with the guide rope 109 between the second pulley 104 and the fourth pulley 106. When the up-down position of the magnet group 126 is adjusted, the handle 114 drives the worm gear 108 to rotate, the worm wheel 107 moves along the axial direction of the worm gear 108, the guide rope 109 moves, and the connecting piece 110, the bearing plate 102 and the magnet group 126 move together. Figure 7 For example, when the worm wheel 107 moves to the left, the connecting piece 110 drives the bearing plate 102 and the magnet group 126 to move downward.

[0049] In the embodiment, the sliding plate 101 is provided with sliding blocks 111 at two ends, and the sliding blocks 111 are provided with rollers 112. The sliding block 111 at one end is slidingly connected with the first sliding groove 301 of the support plate 5, and the roller 112 at one end is located in the first pulley groove 302 of the support plate 5. The sliding block 111 at the other end is slidingly connected with the second sliding groove of the base platform 3, and the roller 112 at the other end is located in the second pulley groove 104 of the base platform 3. The base platform 3 is provided with two limiting blocks 303, and each limiting block 303 is used for limiting the position of a magnet variable resistor 1.

[0050] In the embodiment, each magnet group 126 includes three magnets, the three magnets are the first magnet 116, the second magnet 117 and the third magnet 118 from top to bottom, the first magnet 116, the second magnet 117 and the third magnet 118 are respectively in sliding connection with the bearing plate 102, the reset spring 119 is arranged between the first magnet 116 and the second magnet 117 and between the second magnet 117 and the third magnet 118, the distance adjusting structure includes the fifth pulley 120, the sixth pulley 121, the first guide shaft 122, the second guide shaft 123, the sliding rope 124 and two pulley limiters 125, the fifth pulley 120, the sixth pulley 121, the first guide shaft 122, the second guide shaft 123 and the two pulley limiters 125 are arranged on the bearing plate 102, one end of the sliding rope 124 is connected with the first magnet 116, the other end of the sliding rope 124 is connected with the second magnet 117, the first guide shaft 122 is located between the first magnet 116 and the second magnet 117, the second guide shaft 123 is located between the second magnet 117 and the third magnet 118, the first guide shaft 122 and the second guide shaft 123 are respectively in rotational connection with the bearing plate 102, the first guide shaft 122 and the second guide shaft 123 provide a limiting fulcrum and horizontal sliding guide for the sliding rope 124, one end of each pulley limiter 125 is connected with the bearing plate 102, the other end of the pulley limiter 125 can be bent and extend into the limiting slot of the fifth pulley 120 or the sixth pulley 121 to limit the change of the distance between the magnets caused by the sliding of the fifth pulley 120 or the sixth pulley 121 due to the gravity of the magnets, the sliding rope 124 sequentially passes the first guide shaft 122, the fifth pulley 120, the sixth pulley 121 and the second guide shaft 123, the reset spring 119 can provide a reverse restoring force for one side magnet when the fifth pulley 120 and the sixth pulley 121 rotate, so that the distance between the magnets returns to the initial value, and the falling of the lower magnet due to gravity can be avoided, which affects the damping coupling of the whole device. When in the balance position, the sliding rope 124 is in a taut state, when adjusting the distance between the magnets, the first guide shaft 122 or the second guide shaft 123 is rotated, the friction between the first guide shaft 122 or the second guide shaft 123 and the sliding rope 124 is used to make the sliding rope 124 drive the first magnet 116 or the second magnet 117 to move, and when the adjustment is completed, the fifth pulley 120 or the sixth pulley 121 is locked by the pulley limiter 125. In the embodiment, the first guide shaft 122 or the second guide shaft 123 is used to tighten the upper end or lower end sliding rope 124 to make the first magnet 116 move downward or the second magnet 117 move upward, so that the distance between the magnets is changed, the magnetic force of the magnet group 126 is increased or offset, so that the magnetic damping provided by the magnet group 126 for the whole adjustable magnetic damping damper 100 can be changed. That is, the second magnetic damping adjusting mode is realized: the distance parameter between the magnets in the magnet group 126 is changed, the degree of mutual attraction and repulsion of the magnets in the magnet group 126 is changed to change the magnetic damping provided by the magnets in the magnet group 126.

[0051] In this embodiment, the S pole of the intermediate magnet 6 is close to the load platform 4, the N pole of the intermediate magnet 6 is close to the base platform 3, the N pole of each magnet of one magnet group 126 is close to the intermediate magnet 6, and the S pole of each magnet of the other magnet group 126 is close to the intermediate magnet 6.

[0052] In this embodiment, the stiffness spring rod 2 is mainly used for supporting the load platform 4, restoring displacement after vibration, and hindering the occurrence of vibration to a certain extent. The stiffness spring rod 2 is preferably four, and the four stiffness spring rods 2 are located at four corners. The stiffness spring rod 2 includes a guide rod 201, a first spring seat 202, two second spring seats 203, two springs 204, and a protrusion 205. The first spring seat 202 and the two second spring seats 203 are both in sliding connection with the guide rod 201. The first spring seat 202 is located at one end of the guide rod 201. The first spring seat 202 and the guide rod 201 both pass through a through hole formed on a load plate 401 of the load platform 4. The first spring seat 202 is used for connecting with a magnet. The two second spring seats 203 are respectively located at the middle of the guide rod 201 and the other end of the guide rod 201. The protrusion 205 is located at the other end of the guide rod 201. The two springs 204 are both sleeved on the guide rod 201. One spring 204 is located between the first spring seat 202 and the second spring seat 203 in the middle. The other spring 204 is located between the two second spring seats 203. One end of the guide rod 201 passes through the load platform 4. The protrusion 205 is in threaded connection with the base platform 3. When the vibration amplitude is large, the first spring seat 202 at the upper end is also displaced downward with a large amplitude, thereby generating a large stiffness, that is, a higher upward restoring force. When the magnetic damping of the device takes a large value, the vibration amplitude will be relatively reduced, and the corresponding stiffness will also be smaller. This will make the system inherent frequency move forward, widen the vibration damping frequency band of the system, and improve the high-frequency vibration damping performance.

[0053] In this embodiment, each first spring seat 202 is connected with a magnet arm 403 through a connecting arm 402. The connecting arm 402 is located in a connecting arm groove 404 of the load plate 401. The connecting arm 402 is in groove position connection with the first spring seat 202 and the magnet arm 403, respectively, to form a damping-stiffness coupling mechanism. The magnet arm 403 is fixed relative to the load platform 4 and the intermediate magnet 6, respectively. The stiffness spring rod 2 and the magnet arm 403 of the load platform 4 are connected through the connecting arm 402, so that the stiffness changes with the load, the inherent frequency, the vibration damping frequency band, the resonance peak reduction capacity, and the high-frequency vibration damping performance of the device can be dynamically adjusted.

[0054] The adjustable magnetic damping shock absorber 100 can change the damping of the shock absorber in two ways. The first way is to change the distance between the magnet group 126 and the intermediate magnet 6 fixed on the load platform 4 to change the magnetic damping formed between the magnets. The second way is to change the distance between the magnets in each magnet group 126 to change the magnetic damping formed by the magnets in the magnet group 126, that is, the degree of mutual attraction and repulsion of the magnets. Through these two methods, the magnetic damping of the shock absorber can be more flexibly adjusted and the damping effect can be changed, so that the present embodiment can adapt to a wider working environment.

[0055] Through these two parameter changing methods, the interaction force between the magnets of the magnet group 126 and between the magnet group 126 and the intermediate magnet 6 can be adjusted, and the expression is as follows:

[0056] F = K * (m1*m2) / d 2

[0057] Where F is the interaction force between the magnets of the magnet group 126 or between the magnet group 126 and the intermediate magnet 6, K is a constant related to the material of the magnet, m1 and m2 are the magnetic moments of the magnet group 126 and the intermediate magnet 6 or the magnetic moments of the two magnets of the magnet group 126, and d is the distance between the magnet group 126 and the intermediate magnet 6 or the distance between the two magnets of the magnet group 126. By adjusting the interaction force between the magnets of the magnet group 126 or between the magnet group 126 and the intermediate magnet 6, the magnetic damping of the adjustable magnetic damping shock absorber 100 can be adjusted, and the damping effect of the shock absorber can be changed.

[0058] Figure 10 The first adjustment method for adjusting the magnetic damping in the present embodiment is shown in the schematic diagram. The intermediate magnet 6 is fixed on the magnet arm 403 connected to the load platform 4, and the left magnet group 126 and the right magnet group 126 are located on the two sides of the magnetic variable damper 1. The magnetic variable damper 1 can slide by cooperating with the support plate 5 and the base platform 3 through the roller 112 to realize left and right movement, so as to adjust the distance d1 between the left magnet group 126 and the intermediate magnet 6, the distance d2 between the right magnet group 126 and the intermediate magnet 6, that is, to adjust the horizontal distance parameter in the first adjustment method for adjusting the magnetic damping, so as to change the magnetic damping.

[0059] Figure 11For the principle diagram of the second adjustment magnetic damping mode in the embodiment, the worm gear 107 and the worm 108 can be operated to move the bearing plate 102 of the magnetic variable damper 1 in the vertical direction, that is, to adjust h1, so as to realize the adjustment of the vertical distance parameter in the first adjustment magnetic damping mode and change the size of the magnetic damping provided.

[0060] Figure 12 For the vibration transmission rate effect diagram of the adjustable magnetic damping shock absorber 100 in the embodiment, compared with a general shock absorber, when the system only uses the first magnetic damping adjustment mode to increase the magnetic damping, the magnetic damping of the system is relatively small, the stiffness is relatively large, the resonance frequency vibration peak is high, the natural frequency is large, the damping frequency band is narrow, but the high-frequency damping performance of the system is better. When the system only uses the second magnetic damping adjustment mode to increase the magnetic damping, the magnetic damping is relatively large, the stiffness decreases, the resonance vibration peak decreases, the natural frequency moves forward, the damping frequency band becomes wide, but the high-frequency damping performance of the system becomes poor. When the system uses both magnetic damping adjustment modes to increase the magnetic damping, the magnetic damping of the system reaches the maximum, the stiffness decreases to the minimum value, the resonance frequency vibration peak obviously attenuates, the natural frequency obviously becomes small, and the damping frequency band can be significantly widened, but the high-frequency damping performance of the system is relatively weak. This requires to find a suitable balance between large damping and large stiffness.

[0061] Figure 13 For the low-frequency damping time domain effect diagram of the adjustable magnetic damping shock absorber 100 in the embodiment, compared with a general shock absorber, when the system uses the first magnetic damping adjustment mode to increase the magnetic damping, the vibration amplitude can be effectively attenuated. When the second magnetic damping adjustment mode is used to increase the magnetic damping, a better damping effect than the first magnetic damping adjustment mode can be achieved. When both magnetic damping adjustment modes are used, the damping performance can be further enhanced, and the best damping effect can be achieved.

[0062] In the embodiment, the position adjustment structure drives the bearing plate 102 to move in the vertical direction, so that the vertical distance between the magnetic variable damper 1 and the connecting arm 402 is adjustable, and the damping size of the control device is realized in the vertical distance.

[0063] The sliding plate 101 of the embodiment has a sliding block 111, which can move left and right through the support plate 5 and the base platform 3, so that the horizontal distance between the magnetic damper 1 and the intermediate magnet 6 can be adjusted, and the damping size of the control device is adjusted, that is, the first damping adjustment mode is realized.

[0064] The distance between each magnet of the magnet group 126 of the embodiment is adjusted by the distance adjusting structure, and the spring 204 is used as a distance restoring element, so that the distance between each magnet can be adjusted, and the damping size of the control device is adjusted, that is, the second damping adjustment mode is realized.

[0065] The first spring seat 202 of the embodiment is connected with the magnet arm 403 fixed to the load platform 4 through the connecting arm 402, forming a damping-stiffness coupling mechanism, which can adjust the inherent frequency, damping frequency band, resonance peak reduction capacity, high-frequency damping performance and other indexes of the device;

[0066] The sliding plate 101 used in the embodiment plays a role of up-down guide, that is, the position adjusting structure makes the up-down movement of the bearing plate 102 smooth, greatly reduces the mechanical friction generated during the operation of the device, prolongs the service life of the overall system, occupies small space, and makes the system more portable.

[0067] In the specification, specific examples are applied to explain the principles and implementation modes of the present application, and the above embodiment is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An adjustable magnetic damping vibration absorber, characterized in that: It includes a load platform, a foundation platform, several stiffness spring rods, two magnetic variable dampers, and an intermediate magnet; The load platform is used to support the vibrating target object, the base platform is used to connect to the excitation platform, and the load platform and the base platform are arranged opposite to each other. The intermediate magnet is located between the load platform and the base platform, and the intermediate magnet is fixed relative to the load platform; Both magnetic variable dampers are located between the load platform and the base platform. The two magnetic variable dampers are located on both sides of the intermediate magnet. The distance between the two magnetic variable dampers is adjustable. Each magnetic variable damper includes a magnet group. Each magnet group includes several magnets. The distance between each magnet in the magnet group is adjustable. Each magnet group is set close to the intermediate magnet. One end of each of the stiffness spring rods is slidably connected to the load platform, and the other end of each of the stiffness spring rods is fixed relative to the base platform; The magnetic variable damper further includes a sliding plate, a position adjustment structure, a distance adjustment structure, and a support plate. One end of the sliding plate is slidably connected to a support plate, which is located between the load platform and the base platform. The other end of the sliding plate is slidably connected to the base platform. The position adjustment structure is disposed on the sliding plate. The support plate is used to support the magnet assembly. The distance adjustment structure is disposed on the support plate. The position adjustment structure can adjust the relative position of the support plate and the sliding plate. The distance adjustment structure can adjust the distance between the magnets in each of the magnet assemblies. The position adjustment structure includes a first pulley, a second pulley, a third pulley, a fourth pulley, a worm gear, a worm, a guide cable, and two connecting members. The first pulley, second pulley, third pulley, and fourth pulley are located at the four corners of the sliding plate. The worm gear meshes with the worm, and a handle is provided at the other end of the worm. The worm gear is coaxially arranged with the sliding rod, and the sliding rod is slidably connected to the sliding plate. The guide cable is closed and passes sequentially around the first pulley, the third pulley, the second pulley, the fourth pulley, and the sliding rod. Both connecting members are connected to the support plate. One connecting member is connected to the guide cable between the first pulley and the third pulley, and the other connecting member is connected to the guide cable between the second pulley and the fourth pulley. When adjusting the up and down position of the magnet assembly, the handle drives the worm to rotate, and the worm gear moves along the axial direction of the worm, causing the guide cable to move, which in turn drives the connecting members, the support plate, and the magnet assembly to move together. Each magnet assembly includes three magnets, which are designated as a first magnet, a second magnet, and a third magnet from top to bottom. The first magnet, the second magnet, and the third magnet are slidably connected to the support plate. Return springs are provided between the first magnet and the second magnet, and between the second magnet and the third magnet. The distance adjustment structure includes a fifth pulley, a sixth pulley, a first guide shaft, a second guide shaft, and a cable. The fifth pulley, the sixth pulley, the first guide shaft, and the second guide shaft are all mounted on the support plate. One end of the cable is connected to the first magnet, and the other end of the cable is connected to the second magnet. The first guide shaft is located at... Between the first magnet and the second magnet, the second guide shaft is located between the second magnet and the third magnet. The first guide shaft and the second guide shaft are rotatably connected to the support plate. The cable passes sequentially around the first guide shaft, the fifth pulley, the sixth pulley, and the second guide shaft. When adjusting the distance between the first magnet, the second magnet, and the third magnet, the first guide shaft or the second guide shaft is rotated. The friction between the first guide shaft or the second guide shaft and the cable causes the cable to move the first magnet or the second magnet, thereby changing the distance between the first magnet, the second magnet, and the third magnet.

2. The adjustable magnetic damping vibration damper according to claim 1, characterized in that: Both ends of the sliding plate are provided with sliders, and the sliders are provided with rollers. One end of the slider is slidably connected to the first groove of the support plate, and the roller at one end is located in the first pulley groove of the support plate. The other end of the slider is slidably connected to the second groove of the base platform, and the roller at the other end is located in the second pulley groove of the base platform.

3. The adjustable magnetic damping vibration damper according to claim 1, characterized in that: One end of the worm gear is rotatably connected to the fixed sleeve on the sliding plate.

4. The adjustable magnetic damping vibration damper according to claim 1, characterized in that: The support plate is also provided with two pulley limiters. One end of each pulley limiter is connected to the support plate, and the other end of each pulley limiter can extend into the limiting groove of the fifth pulley or the sixth pulley.

5. The adjustable magnetic damping vibration damper according to claim 1, characterized in that: The S pole of the intermediate magnet is close to the load platform, the N pole of the intermediate magnet is close to the base platform, the N pole of each magnet in one magnet group is close to the intermediate magnet, and the S pole of each magnet in another magnet group is close to the intermediate magnet.

6. The adjustable magnetic damping vibration damper according to claim 1, characterized in that: The stiffness spring rod includes a guide rod, a first spring seat, two second spring seats, two springs, and a protrusion. The first spring seat and the two second spring seats are slidably connected to the guide rod. The first spring seat is located at one end of the guide rod and is used to connect with the magnet. The two second spring seats are located at the middle part of the guide rod and the other end of the guide rod, respectively. The protrusion is located at the other end of the guide rod. Both springs are sleeved on the guide rod. One spring is located between the first spring seat and the middle second spring seat, and the other spring is located between the two second spring seats. One end of the guide rod passes through the load platform, and the protrusion is threadedly connected to the base platform.

7. The adjustable magnetic damping vibration damper according to claim 6, characterized in that: Each of the first spring seats is connected to a magnet arm via a connecting arm, and the magnet arm is fixed relative to the load platform and the intermediate magnet, respectively.

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