Shock-resistant magnetorheological dampers

Abstract

This disclosure provides an impact-resistant magnetorheological damper, comprising: a cylinder body suitable for containing magnetorheological fluid; a piston assembly slidably disposed within the cylinder body, the piston assembly dividing the internal space of the cylinder body into an upper space and a lower space, the piston assembly comprising: an upper piston cap with a first through hole at its center; a lower piston cap with a second through hole at its center; an annular permanent magnet sandwiched between the upper and lower piston caps, the inner annular space of the annular permanent magnet being coaxially arranged with the first and second through holes; a magnetic isolation ring sleeved on the outside of the annular permanent magnet; a coil mounting cylinder disposed outside the magnetic isolation ring; an excitation coil wound on the coil mounting cylinder; and a piston cylinder body sleeved on the outside of the coil mounting cylinder, the piston cylinder body being sealed to the upper and lower piston caps respectively, a gap existing between the inner wall of the piston cylinder body and the excitation coil, the upper and lower ends of the gap being respectively provided with radial channels connecting the first and second through holes.

Description

Technical Field

[0001] This disclosure relates to the field of shock protection, and in particular to a shock-resistant magnetorheological damper capable of adaptively changing the flow path. Background Technology

[0002] In scenarios such as aircraft takeoff and landing, spacecraft soft landing, and recoil suppression of large artillery pieces, dampers are widely used in high-speed impact situations to reduce the harm caused by excessive speed and energy to vehicles and people. Common impact dampers include hydraulic dampers, which eliminate or buffer vibration and impact through fluid viscosity and inertia; air spring dampers, which absorb energy and reduce impact and vibration by utilizing the compressibility and elasticity of gases; elastic dampers, which use the flexibility and energy absorption capacity of elastic materials to mitigate or eliminate impact and vibration, and are usually made of polymer, rubber, or metal springs, and can be customized as needed; friction dampers, which use the friction between materials to mitigate or eliminate impact and vibration, and are usually made of metal or composite materials, with the coefficient of friction of the materials adjustable as needed; and magnetorheological dampers, which utilize the rheological properties of magnetic fluids and magnetic field control to mitigate or eliminate vibration and impact, suitable for high-speed and high-quality systems. Among these, magnetorheological dampers are widely used in large engineering machinery due to their advantages of fast response speed and high precision. Therefore, after optimizing the structure of the traditional magnetorheological damper, the novel shock-resistant magnetorheological damper was designed.

[0003] Magnetorheological fluids are smart materials composed of a liquid carrier, iron-containing particles with a diameter of a few micrometers, and surface-active additives to prevent particle sedimentation. Under the influence of an external magnetic field, they can instantaneously (on the millimeter scale) change various physical properties, such as apparent viscosity and plasticity. They can transform from a free-flowing liquid into a semi-solid, exhibiting a controllable yield strength, and this change is reversible. Dampers made based on this property of magnetorheological fluids have simple structures, fast response speeds, large dynamic ranges of damping forces, and good durability. They can continue to function even if the system loses control, demonstrating high reliability.

[0004] In the current development of magnetorheological dampers, the pursuit is to increase the maximum output force and the dynamic adjustable range of the damping force. Generally, once the internal flow channel of such dampers is designed, it does not change during use, and the damper channel directly affects the damping force output. This leads to a sharp increase in uncontrollable viscous damping force in high-speed scenarios. In some scenarios where maximum damping force needs to be controlled, such as aircraft landing gear and seat suspension, exceeding the damage limit of the load makes it difficult to protect the safety of the equipment and occupants. Summary of the Invention

[0005] To address the aforementioned technical problems, this disclosure provides an impact-resistant magnetorheological damper capable of outputting stable damping force at low, medium, and high speeds, particularly reducing force spikes at high speeds and ensuring the reliability of the damper.

[0006] According to one embodiment of this disclosure, an impact-resistant magnetorheological damper is provided, comprising:

[0007] The cylinder body is designed to hold magnetorheological fluid.

[0008] A piston assembly, slidably disposed within the cylinder, divides the internal space of the cylinder into an upper space and a lower space. The piston assembly includes:

[0009] The piston's upper end cap has a first through hole in the center;

[0010] The piston's lower end cap has a second through hole in the center;

[0011] A ring-shaped permanent magnet is sandwiched between the upper end cap and the lower end cap of the piston, and the inner ring space of the ring-shaped permanent magnet is coaxially arranged with the first through hole and the second through hole;

[0012] A magnetic shielding ring is fitted onto the outside of the annular permanent magnet.

[0013] A coil mounting cylinder is disposed on the outside of the magnetic shielding ring;

[0014] The excitation coil is wound around the coil mounting cylinder;

[0015] A piston cylinder is sleeved on the outside of the coil mounting cylinder. The piston cylinder is sealed to the upper end cover of the piston and the lower end cover of the piston. There is a gap between the inner wall of the piston cylinder and the excitation coil. The upper and lower ends of the gap are respectively provided with radial channels connecting the first through hole and the second through hole.

[0016] The inner ring space, the first through hole, and the second through hole constitute a first channel, and the gap, the radial channel, the first through hole, and the second through hole constitute a second channel. In response to the piston assembly moving at a speed lower than a preset threshold, the magnetorheological fluid flows only through the second channel. In response to the piston assembly moving at a speed greater than or equal to the preset threshold, the magnetorheological fluid flows through both the first channel and the second channel simultaneously.

[0017] According to some embodiments of this disclosure, the shock-resistant magnetorheological damper further includes:

[0018] The piston rod has one end that slides through and seals through the first end of the cylinder and is connected to the upper end cap of the piston.

[0019] According to some embodiments of this disclosure, the piston assembly further includes:

[0020] The piston core is a cylindrical structure made of soft magnetic material, and the piston core is disposed between the magnetic shielding ring and the coil mounting cylinder.

[0021] According to some embodiments of this disclosure, the shock-resistant magnetorheological damper further includes:

[0022] A floating piston is slidably disposed inside the cylinder. The floating piston and the piston rod are respectively disposed on both sides of the piston assembly. The floating piston separates an energy storage space at the second end of the cylinder. The energy storage space is suitable for filling with compressed gas of a preset intensity.

[0023] According to some embodiments of this disclosure, the upper end face of the piston cylinder and the bottom surface of the piston upper end cover are respectively provided with a first boss and a first positioning groove for positioning; and

[0024] The lower end face of the piston cylinder and the top surface of the lower end cover of the piston are respectively provided with a second boss and a second positioning groove for positioning.

[0025] According to some embodiments of this disclosure, the cylinder body includes:

[0026] Cylinder block body;

[0027] The upper end cover is sealed at one end of the cylinder body, and a third through hole is provided at the center of the upper end cover;

[0028] The lower end cap is sealed at the other end of the cylinder body;

[0029] The shock-resistant magnetorheological damper also includes:

[0030] A guide ring is embedded in the third through hole, and the guide ring is slidably and sealingly connected to the piston rod.

[0031] According to some embodiments of this disclosure, the guide ring is provided with a stepped groove, and the shock-resistant magnetorheological damper further includes:

[0032] A skeleton oil seal is securely embedded in the stepped groove and is suitable for sealing the magnetorheological fluid inside the cylinder.

[0033] According to some embodiments of this disclosure, the piston upper end cap is provided with a wire hole for passing through a wire;

[0034] The piston rod has a hollow structure, the piston rod is connected to the wire hole, and a fourth through hole is opened on the side of the piston rod;

[0035] The shock-resistant magnetorheological damper also includes:

[0036] One end of the wire is electrically connected to the excitation coil, and the other end passes through the wire hole, the piston rod, and the fourth through hole in sequence to facilitate connection with an external power source.

[0037] According to some embodiments of this disclosure, the shock-resistant magnetorheological damper further includes:

[0038] A graphite gasket is fitted onto the piston rod. The graphite gasket is disposed between the upper end cap of the piston and the first end. The graphite gasket is suitable for buffering the collision between the upper end cap of the piston and the first end.

[0039] According to some embodiments of this disclosure, the piston assembly further includes:

[0040] The protrusion extends outward from the upper end cover of the piston along the axial direction of the upper end cover. The protrusion is hollow inside and communicates with the first through hole. A fifth through hole for the inflow / outflow of the magnetorheological fluid is provided on the side of the protrusion.

[0041] According to the embodiments of the present disclosure, the impact-resistant magnetorheological damper can adaptively change the flow channel through two relatively independent channels. In high-speed situations, the magnetorheological fluid in the middle of the permanent magnet hole is forced open by pressure, the lower flow channel opens, and the damping force decreases. This allows the new damper to output a relatively small uncontrollable viscous damping force in high-speed impact situations. It can output a stable damping force at low, medium, and high speeds, especially reducing the occurrence of force peaks at high speeds, thus ensuring the reliability of the damper. Attached Figure Description

[0042] Figure 1 This is a front view of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure;

[0043] Figure 2 Figure 1 The cross-sectional view of the shock-resistant magnetorheological damper shown is shown.

[0044] Figure 3 This is a cross-sectional view of the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure;

[0045] Figure 4 This is a schematic diagram showing the flow of magnetorheological fluid along a first channel and a second channel within the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure.

[0046] Figure 5 The schematic diagram illustrates a top view and a cross-sectional view of the piston core and adjacent components of an impact-resistant magnetorheological damper according to an embodiment of the present disclosure; and

[0047] Figure 6 This is a perspective view of the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure.

[0048] The meanings of the reference numerals in the above figures are as follows:

[0049] 1-Cylinder block;

[0050] 101 - Cylinder block body;

[0051] 102 - Top cover;

[0052] 103 - Lower end cap;

[0053] 2-Piston assembly;

[0054] 201 - Piston upper cap;

[0055] 2011 - First through hole;

[0056] 202 - Piston lower end cap;

[0057] 2021 - Second through hole;

[0058] 203-Ring permanent magnet;

[0059] 2031 - Inner Ring Space;

[0060] 204-Magnetic shielding ring;

[0061] 205 - Coil mounting cylinder;

[0062] 206 - Excitation coil;

[0063] 207 - Piston cylinder block;

[0064] 208 - Piston core;

[0065] 2081 - Screw hole;

[0066] 209 - Protrusion;

[0067] 2091 - Fifth through hole;

[0068] 3-Piston rod;

[0069] 4-Floating piston;

[0070] 5-Guide ring;

[0071] 6-Skeleton oil seal;

[0072] W1 - First Passage; and

[0073] W2 - Second Channel. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0075] However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of embodiments of this disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure.

[0076] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0077] When using expressions such as "at least one of A, B, and C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.). Similarly, when using expressions such as "at least one of A, B, or C," the expression should generally be interpreted in accordance with the meaning commonly understood by a person skilled in the art (e.g., "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0078] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0079] In conventional magnetorheological dampers, the internal flow channel remains unchanged during use once designed, directly affecting the damping force output. This leads to a sharp increase in uncontrollable viscous damping force at high speeds, resulting in high velocity sensitivity of the output damping force. In scenarios requiring controlled peak damping forces, such as aircraft landing gear and seat suspensions, exceeding the load's damage limit can compromise the safety of the equipment structure and occupants. To address the shortcomings of current magnetorheological dampers, this disclosure proposes a low-velocity, shock-resistant magnetorheological damper. This damper can output stable damping forces at low, medium, and high speeds, particularly reducing force spikes at high speeds, thus ensuring the reliability of the damper.

[0080] Figure 1 This is a front view of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure; Figure 2 Figure 1 The cross-sectional view of the shock-resistant magnetorheological damper shown is shown. Figure 3 This is a cross-sectional view of the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure; Figure 4 This is a schematic diagram showing the flow of magnetorheological fluid along a first channel and a second channel within the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure.

[0081] According to one embodiment of this disclosure, an impact-resistant magnetorheological damper is provided, such as... Figures 1 to 4 As shown, it includes a cylinder body 1 and a piston assembly 2.

[0082] According to some embodiments of this disclosure, the interior of the cylinder 1 is suitable for holding magnetorheological fluid as a damping medium.

[0083] According to some embodiments of this disclosure, the piston assembly 2 is slidably disposed within the cylinder 1. The piston assembly 2 divides the internal space of the cylinder into an upper space and a lower space. The piston assembly 2 includes an upper piston cap 201, a lower piston cap 202, an annular permanent magnet 203, a magnetic shielding ring 204, a coil mounting cylinder 205, an excitation coil 206, and a piston cylinder 207.

[0084] According to some embodiments of this disclosure, a first through hole 2011 is provided in the central region of the piston upper end cover 201. A second through hole 2022 is provided in the center of the piston lower end cover 202. An annular permanent magnet 203 is sandwiched between the piston upper end cover 201 and the piston lower end cover 202, and the inner annular space 2031 of the annular permanent magnet 203 is coaxially arranged with the first through hole 2011 and the second through hole 2021. A magnetic isolation ring 204 is sleeved on the outside of the annular permanent magnet 203. A coil mounting cylinder 205 is disposed outside the magnetic isolation ring 204. An excitation coil 206 is wound on the coil mounting cylinder 205. A piston cylinder 207 is fitted onto the outside of the coil mounting cylinder 205. The piston cylinder 207 is sealed to the upper piston cap 201 and the lower piston cap 202. There is a gap between the inner wall of the piston cylinder 207 and the excitation coil 206. The upper and lower ends of the gap are respectively provided with radial channels connecting the first through hole 2011 and the second through hole 2021. The inner ring space 2031, the first through hole 2011 and the second through hole 2021 constitute the first channel W1. The gap, the radial channel, the first through hole 2011 and the second through hole 2022 constitute the second channel W2. When the moving speed of the piston assembly 2 is lower than a preset threshold, the magnetorheological fluid flows only through the second channel W2. When the moving speed of the piston assembly 2 is greater than or equal to the preset threshold, the magnetorheological fluid flows through both the first channel W1 and the second channel W2.

[0085] In this embodiment, the flow channel can be adaptively changed through two relatively independent channels W1 and W2. In high-speed situations, the magnetorheological fluid in the middle of the permanent magnet hole is forced open by pressure, the lower flow channel opens, and the damping force decreases. This allows the new type of damper to output a relatively small uncontrollable viscous damping force in high-speed impact situations. It can output a stable damping force at low, medium and high speeds, especially reducing the occurrence of force peaks at high speeds, thus ensuring the reliability of the damper.

[0086] According to some optional embodiments of this disclosure, the magnetic field strength of the annular permanent magnet 203 is greater than the magnetic field strength generated by the excitation coil 206 during normal operation. Under the influence of the annular permanent magnet 203, the magnetorheological fluid in the inner ring space 2031 becomes semi-solid, and its viscosity increases. Under the action of the magnetic field generated by the excitation coil 206, the viscosity of the magnetorheological fluid in the above-mentioned gap increases (but is less than the viscosity of the magnetorheological fluid in the inner ring space 2031). When the moving speed of the piston assembly 2 is lower than the preset threshold, the inner ring space 2031 is closed. When the magnetorheological fluid flows between the upper and lower spaces, it can only pass through the above-mentioned gap, that is, it can only flow through the second channel W2. At this time, the damping force of the magnetorheological damper maintains a large damping force output. When the moving speed of the piston assembly 2 exceeds the preset threshold, the above-mentioned semi-solid is pushed out of the inner ring space 2031, and the inner ring space 2031 opens. At this time, the first channel W1 and the second channel W2 are both opened, and the magnetorheological fluid flows through the two channels. At this time, the damping force of the magnetorheological damper will not increase sharply with the increase of speed, but outputs a more appropriate damping force.

[0087] According to some optional embodiments of this disclosure, in order to ensure that the magnetorheological damper reduces the damping force sufficiently when the magnetorheological fluid flows through the first channel W1 under high-impact and high-speed conditions, the aperture of the first channel W1 is set to be relatively large, with the aperture range including 4 to 6 mm.

[0088] According to some optional embodiments of this disclosure, in order to ensure that the inner ring space 2031 is not blown open by the magnetorheological fluid during the low-speed operation of the magnetorheological damper, the annular permanent magnet 203 is selected as a permanent magnet with a large magnetic induction intensity. For example, the grade of the annular permanent magnet 203 is N52, which can generate a sufficiently large magnetic field at the center.

[0089] According to some embodiments of this disclosure, the piston upper end cap 201 is provided with a plurality of hollow holes communicating with the first through hole to facilitate the inflow and outflow of magnetorheological fluid.

[0090] According to some embodiments of this disclosure, the annular permanent magnet 203 is radially magnetized.

[0091] According to some embodiments of this disclosure, the shock-resistant magnetorheological damper further includes a piston rod 3, one end of which slidably and sealingly passes through the first end of the cylinder 1 and is connected to the piston upper end cap 201.

[0092] According to some embodiments of this disclosure, one end of the piston rod 3 is provided with external threads, and the piston upper end cover 201 is provided with threaded concealed holes. The piston rod 3 and the piston upper end cover 201 are connected by threads. Further optionally, the connection between the piston rod 3 and the piston upper end cover 201 is reinforced with metal adhesive.

[0093] Figure 5The diagram schematically illustrates a top view and a cross-sectional view of the piston core and adjacent components of an impact-resistant magnetorheological damper according to an embodiment of the present disclosure.

[0094] According to some embodiments of this disclosure, such as Figure 5 As shown, piston assembly 2 also includes piston core 208, which is a cylindrical structure made of soft magnetic material. Piston core 208 is disposed between magnetic shielding ring 204 and coil mounting cylinder 205. Piston core 208 is the skeleton support structure of piston assembly.

[0095] According to some optional embodiments of this disclosure, the magnetic shielding ring 204 is a magnetic shielding copper ring to prevent the magnetic field generated by the annular permanent magnet 203 from entering the piston core 208, thereby reducing the magnetic field strength in the inner ring space 2031.

[0096] According to some embodiments of this disclosure, the impact-resistant magnetorheological damper further includes a floating piston 4, which is slidably disposed inside the cylinder 1. The floating piston 4 and the piston rod 3 are respectively disposed on both sides of the piston assembly 2. The floating piston 4 separates an energy storage space at the second end of the cylinder, and the energy storage space is suitable for filling with compressed gas of a preset intensity.

[0097] According to some optional embodiments of this disclosure, the energy storage space is filled with high-pressure inert gas to provide initial pressure to the system. When the magnetorheological damper is compressed, the piston rod 3 enters the cylinder, and the floating piston 4 compresses the inert gas. When the magnetorheological damper is stretched, the piston rod 3 extends out of the cylinder 1, and the floating piston 4 resets under the action of the compressed gas.

[0098] According to some optional embodiments of this disclosure, O-rings for sealing are installed on the sides of the upper and lower ends of the floating piston 4, and a guide strip for contact friction (not shown in the figure) is installed between the two O-rings.

[0099] According to some optional embodiments of this disclosure, the floating piston 4, in conjunction with the energy storage space, plays a compensating role for the damper, compensating for the increase or decrease in volume of the piston rod 3 within the cylinder 1. When the piston rod 3 enters and exits the cylinder 1 of the magnetorheological damper, the volume within the cylinder 1 changes. The energy accumulator can compensate for the increase or decrease in volume caused by the piston rod 3 entering and exiting the cylinder 1, thereby effectively ensuring the normal movement of the piston rod 3.

[0100] Specifically, during the compression process of the magnetorheological damper, the piston rod 3 gradually enters the cylinder 1. The volume of the piston rod 3 entering the cylinder 1 decreases, and the pressure in the lower space increases. At this time, the floating piston 4 moves downward. The volume reduction of the energy storage space is the volume of the piston rod 3 entering the cylinder 1. During the tension recovery process of the magnetorheological damper, that is, during the extension of the piston rod 3, as the piston rod 3 is pulled out, the volume of the cylinder 1 increases, the pressure in the upper space decreases, and the floating piston 4 returns to its original position under the thrust of the high-pressure gas in the energy storage space.

[0101] According to some embodiments of this disclosure, the upper end surface of the piston cylinder 207 and the bottom surface of the piston upper end cover 201 are respectively provided with a first boss and a first positioning groove (not shown in the figure) for positioning. The lower end surface of the piston cylinder 207 and the top surface of the piston lower end cover 202 are respectively provided with a second boss and a second positioning groove for positioning.

[0102] According to some embodiments of this disclosure, the cylinder body 1 includes a cylinder body 101, an upper end cover 102, and a lower end cover 103. The upper end cover 102 is sealed at one end of the cylinder body 101, and a third through hole is provided at the center of the upper end cover 102. The lower end cover 103 is sealed at the other end of the cylinder body 101. The shock-resistant magnetorheological damper also includes a guide ring 5, which is embedded in the third through hole and is slidably and sealed to the piston rod 3.

[0103] According to some embodiments of this disclosure, threaded holes are evenly distributed around the upper and lower ends of the cylinder body 101, and the cylinder body 101 is connected and fixed to the upper end cover 102 and the lower end cover 103 by screws.

[0104] According to some embodiments of this disclosure, the guide ring 5 is used to reduce friction between the piston cylinder, piston rod and cylinder wall, ensure guiding capability and reduce lateral force.

[0105] According to some embodiments of this disclosure, a stepped groove is provided on the guide ring 5, and the impact-resistant magnetorheological damper also includes a skeleton oil seal 6, which is sealed and embedded in the stepped groove. The skeleton oil seal 6 is suitable for sealing the magnetorheological fluid in the cylinder.

[0106] According to some optional embodiments of this disclosure, a groove is provided on the inner sidewall of the stepped groove, and an O-ring is installed in the groove to cooperate with the skeleton oil seal 6 to seal the magnetorheological fluid.

[0107] According to some embodiments of this disclosure, the piston upper end cap 201 is provided with a wire hole for a wire to pass through. The piston rod 3 is a hollow structure, the piston rod 3 is connected to the wire hole, and a fourth through hole is opened on the side of the piston rod 3. The shock-resistant magnetorheological damper also includes a wire, one end of which is electrically connected to the excitation coil 206, and the other end passes through the wire hole, the piston rod 3 and the fourth through hole in sequence to facilitate connection with an external power source.

[0108] According to some optional embodiments of this disclosure, the wire extends from the hollow piston rod 3, which is provided with a mounting pin to prevent the wire from abrading.

[0109] According to some embodiments of this disclosure, the impact-resistant magnetorheological damper further includes a graphite gasket, which is sleeved on the piston rod 3. The graphite gasket 3 is disposed between the piston upper end cover and the first end, and the graphite gasket is suitable for buffering the collision between the piston upper end cover 201 and the first end.

[0110] Figure 6 This is a perspective view of the piston assembly of an impact-resistant magnetorheological damper according to an exemplary embodiment of the present disclosure.

[0111] According to some embodiments of this disclosure, such as Figure 6 As shown, the piston assembly also includes a protrusion 209, which extends outward from the piston upper end cover 201 along the axial direction of the piston upper end cover 201. The protrusion is hollow inside and communicates with the first through hole 2011. A fifth through hole 2091 for the inflow / outflow of magnetorheological fluid is provided on the side of the protrusion.

[0112] The embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the various components described above are not limited to the specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0113] It should also be noted that, in the specific embodiments of this disclosure, unless otherwise stated otherwise, the numerical parameters in this specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained from the content of this disclosure. Specifically, all numbers used in the specification and claims to indicate dimensions, range conditions, etc., of the composition should be understood to be modified by the term "about" in all cases. Generally, this means that there may be variations of ±10% in some embodiments, ±5% in some embodiments, ±1% in some embodiments, and ±0.5% in some embodiments.

[0114] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure can be combined or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0115] The above specific embodiments further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A shock resistant magnetorheological damper, characterized by, The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper.

2. The impact-resistant magnetorheological damper of claim 1, wherein, The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper.

3. The impact-resistant magnetorheological damper of claim 1, wherein, The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper.

5. The impact-resistant magnetorheological damper of claim 1, wherein, The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper.

6. The impact-resistant magnetorheological damper of claim 5, wherein, The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magneto-rheological damper. The application relates to an impact-resistant magn 7. The impact-resistant magneto-rheological damper according to claim 1, wherein a wire hole for leading a wire is arranged on the piston upper end cover; the piston rod is a hollow structure, the piston rod is communicated with the wire hole, and a fourth through hole is arranged on the side surface of the piston rod; the impact-resistant magneto-rheological damper further comprises: a wire, one end of which is electrically connected with the excitation coil, and the other end of which sequentially passes through the wire hole, the piston rod and the fourth through hole, so as to be connected with an external power supply. the impact-resistant magneto-rheological damper further comprises:

8. The impact-resistant magnetorheological damper of claim 1, wherein, a graphite gasket, which is sleeved on the piston rod, is arranged between the piston upper end cover and the first end, and is suitable for buffering the collision between the piston upper end cover and the first end. the piston assembly further comprises:

9. The impact-resistant magnetorheological damper of claim 1, wherein, a protruding portion, which extends outward along the axial direction of the piston upper end cover, is hollow inside and communicated with the first through hole, and a fifth through hole for flowing in / out of the magneto-rheological fluid is arranged on the side surface of the protruding portion. ​

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