Magneto-rheological shock absorber

Abstract

The utility model relates to the technical field of dampers, and particularly discloses a magneto-rheological shock absorber which comprises an energy storage chamber, a floating piston, a cylinder body, a lower cavity, a piston assembly, an upper end cover, an upper cavity, a magnetic conductive plate, a first piston end cover, a check ring, a piston rod, a coil, a piston outer barrel, a piston core and a second piston end cover. The magnetorheological damper is compact in overall structure and convenient to install. According to the structure, the piston outer cylinder is arranged, the piston end covers are arranged at the two ends of the piston outer cylinder for spinning fit, the piston rod is connected to one end of the piston assembly through the design of the check ring, the coil is externally arranged, and the coil is located between the piston core and the piston outer cylinder, so that occupation of the size of the piston core is greatly reduced; the volume of the magnetic material in the piston core is greatly increased, the magnetic field intensity and the magnetorheological effect are fully guaranteed, and the dynamic range of the magnetorheological damper is greatly enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a magnetorheological shock absorber. Background Art

[0002] Magnetorheological technology and equipment are in a period of large-scale growth in technology and application in the world and China. In the fields of military and civilian automobiles, engineering machinery, engineering vehicles, medical equipment, industrial processing and equipment shock absorption, more and more magnetorheological dampers use magnetorheological fluid as the working medium to achieve technical effects such as shock absorption, cushioning and comfort experience.

[0003] Magnetorheological fluid is a liquid whose viscosity changes with the appearance and change of magnetic field. It is a stable suspension system composed of soft magnetic particles with high magnetic permeability and low magnetic hysteresis uniformly dispersed in a non-magnetic carrier liquid through the action of surfactant. The working principle of magnetorheological fluid is: under the action of an external magnetic field, each particle is polarized into a magnetic dipole, and each dipole attracts each other. The chain-like structure formed between the two magnetic poles is like a bridge across the poles, which hinders the normal flow of the fluid and produces solid-like characteristics. When the external magnetic field is removed, the fluid returns to its original state, that is, the magnetorheological fluid undergoes a rapid and reversible conversion between liquid and solid. The degree of solidification is in a stable and reversible relationship with the current intensity, that is, by controlling the current intensity, the shear yield strength of the solidified magnetorheological fluid can be accurately controlled. Based on this characteristic, we have made a magnetorheological shock absorber with adjustable damping force.

[0004] When the magnetorheological damper is working, the piston reciprocates in the cylinder and the magnetorheological fluid flows through the flow channel on the piston. The magnetorheological fluid in the flow channel is exposed to a changing magnetic field generated by providing a changing current to a coil set in the piston. The piston is formed by combining a metallic soft magnetic material with an electric coil to form an electromagnet. The electromagnet applies a magnetic field to the magnetorheological fluid in the flow channel. The application of the magnetic field causes tiny metal particles in the magnetorheological fluid to form chains at the openings, and these chains are usually arranged in the direction of the magnetic flux and perpendicular to the flow of the magnetorheological fluid flowing through the piston. The tiny metal particle chains restrict the movement of the magnetorheological fluid through the piston opening and cause an increase in the yield stress of the magnetorheological fluid. The increase in the yield stress of the magnetorheological fluid causes an increase in the force in the magnetorheological damper.

[0005] Common magnetorheological dampers (shock absorbers) include a cylinder, a piston rod, a piston core, and an electromagnetic unit (coil), etc. The piston rod of an existing shock absorber is usually set through the piston core, and its coil is usually directly set on the piston core, which will reduce the volume of the magnetic material inside the piston core, thereby reducing the magnetic field strength and weakening the magnetorheological effect. Utility Model Content

[0006] The technical problem solved by the utility model is that the piston rod of the existing shock absorber is usually set through the piston core, and its coil is usually directly set on the piston core, which will reduce the volume of the magnetic material inside the piston core, thereby reducing the magnetic field strength and causing the magnetorheological effect to weaken.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A magnetorheological shock absorber, comprising:

[0009] A cylinder body, one end of which is open, an upper end cover is arranged in the opening, and a damping medium is filled in the cylinder body;

[0010] A piston assembly is slidably disposed in the cylinder body and divides the space in the cylinder body into an upper cavity and a lower cavity. A flow channel is disposed in the piston assembly and is connected to the upper cavity and the lower cavity respectively. The piston assembly includes:

[0011] A piston core, wherein the piston core is made of a soft magnetic material with high saturation magnetic induction intensity;

[0012] A piston rod, one end of which is fixedly connected to the piston core and the other end of which movably passes through the upper end cover;

[0013] A magnetic conductive plate, wherein a plurality of magnetic conductive plates are sleeved on the piston core at intervals;

[0014] A magnetic isolation ring, which is located between two adjacent magnetic conductive plates and sleeved on the piston core;

[0015] A piston outer cylinder, which is sleeved on the outside of the magnetic conductive plate and slidably matched with the inner wall of the cylinder;

[0016] The coil is arranged between the piston outer cylinder, the magnetic isolation ring and the area enclosed by the magnetic conductive plate, and a plurality of coils are connected in series;

[0017] The piston end covers are arranged at both ends of the piston sleeve and are fixedly connected to the piston sleeve.

[0018] In one solution of the utility model: the piston end cover is threadably matched with the piston outer tube.

[0019] In one solution of the utility model: both ends of the piston outer tube are provided with step portions which cooperate with the piston end cover.

[0020] In one solution of the utility model: a groove is provided at one end of the piston rod located in the cylinder body, a stop ring is provided in the groove, and after the piston end cover 1 is tightened with the piston outer tube, the bottom surface of the piston end cover 1 abuts against the stop ring.

[0021] In one solution of the utility model: a floating piston is slidably provided at one end of the cylinder body away from the upper end cover, and an energy storage chamber is enclosed between the floating piston and the cylinder body, and the energy storage chamber is filled with inert gas.

[0022] In one solution of the utility model: a guide ring and a sealing ring are arranged between the floating piston and the inner wall of the cylinder body.

[0023] In one solution of the utility model: a step structure cooperating with the magnetic isolation ring is arranged on the inner side of the magnetic conductive plate.

[0024] In one solution of the utility model: guide rings are respectively arranged between the piston outer tube and the cylinder body, and between the piston rod and the upper end cover.

[0025] In one solution of the utility model: the damping medium is a magnetorheological fluid.

[0026] In one solution of the utility model: one end of the piston rod located outside the cylinder body is provided with a thread for connecting to a ball joint.

[0027] Beneficial effects of the utility model:

[0028] The magnetorheological shock absorber of the present application has a compact overall structure and is easy to install. The structure is provided with a piston outer cylinder and piston end covers at both ends for spin-pressing, the piston rod is connected to one end of the piston assembly through a stop ring design, and the coil is placed externally, and the coil is located between the piston core and the piston outer cylinder. In this way, the occupation of the piston core volume is greatly reduced, the volume of the magnetic material inside the piston core is greatly increased, the magnetic field strength and the effect of the magnetorheological effect are fully guaranteed, and the dynamic range of the magnetorheological shock absorber is greatly increased.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0032] Figure 2 It is a structural schematic diagram of the cross section of the utility model.

[0033] The reference numerals in the figure are:

[0034] 1. Energy storage chamber; 2. Floating piston; 3. Cylinder body; 4. Lower cavity; 5. Piston assembly; 6. Upper end cover; 7. Upper cavity;

[0035] 501, magnetic conductive plate one; 502, magnetic conductive plate two; 503, magnetic conductive plate three; 504, piston end cover one; 505, stop ring; 506, piston rod; 507, magnetic isolation ring; 508, piston core; 509, piston outer tube; 510, piston end cover two; 511, coil; 512, pin; 513, flow channel. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] See also Figure 1-2The utility model is a magnetorheological shock absorber, comprising: an energy storage chamber 1, a floating piston 2, a cylinder body 3, a lower cavity 4, a piston assembly 5, an upper end cover 6, an upper cavity 7, a magnetic conductive plate, a piston end cover 1 504, a stop ring 505, a piston rod 506, a coil 511, a piston outer tube 509, a piston core 508 and a piston end cover 2 510. The upper end of the cylinder body 3 is provided with an upper end cover 6, and the inner cavity of the cylinder body 3 is filled with a damping medium; a piston assembly 5 is arranged in the cylinder body 3, and the piston assembly 5 divides the inner cavity of the cylinder body 3 into an upper cavity 7 and a lower cavity 4; and a piston rod 506, one end of the piston rod 506 is fixedly connected to the piston assembly 5, and the other end passes through the upper cavity 7 and the upper end cover 6 in turn and extends outward from the cylinder body 3 along the axial direction, and forms a dynamic seal with the upper end cover 6, and the piston rod 506 can drive the piston assembly 5 to move along the cylinder body 3; wherein, the piston assembly 5 includes a movable A plug, an electromagnetic unit arranged in the main piston, and two magnetorheological fluid flow channels 513 formed by a piston end cover 1 504, a piston end cover 2 510 and a piston core 508, wherein the magnetorheological fluid flow channels 513 are respectively connected to the upper cavity 7 and the lower cavity 4, and the electromagnetic unit can generate a magnetic field in the magnetorheological fluid channel after being energized. When the magnetorheological damper is under pressure, the damping medium in the lower cavity 4 flows to the upper cavity 7 through the magnetorheological fluid flow channel 513, and when it is under tension, the magnetorheological fluid in the upper cavity 7 flows to the lower cavity 4 through the magnetorheological fluid flow channel 513;

[0040] See also Figure 1-2 In one embodiment of the utility model, a groove is provided at one end of the piston rod 506, and a stop ring 505 is provided in the groove. When the upper part of the piston outer cylinder 509 is spun, the stop ring 505 inhibits the upward movement of the piston rod 506. The piston rod 506 is hollow inside, and the ferromagnetic unit lead is led out from the middle. A plug-in port is provided to prevent the ferromagnetic unit lead from being worn. The piston core 508 forms a slit between the magnetic conductive plates, connecting the upper and lower cavities 4, serving as a magnetorheological fluid flow channel 513 for the entry and exit of magnetorheological fluid. A circle of annular bosses is provided on the surface matching with the piston outer cylinder 509 for positioning and ensuring concentricity.

[0041] See also Figure 1-2In one embodiment of the utility model, the second piston end cover 510 is provided with a wire groove for leading out the coil 511, and the top surface of the second piston end cover 510 is provided with a protrusion for axial positioning of the piston. The coil 511 is a copper coil 511 wound on the magnetic isolation ring 507. Coils 511 are provided between the two magnetic conductive plates, and the coils 511 and 511 are connected in series. The magnetic field passes through the magnetic conductive plates, the piston core 508, and the magnetorheological fluid flow channel 513. The inner side of the magnetic conductive plate is provided with a step, which is interference-fitted with the magnetic isolation ring 507 to form a whole. The outer side of the magnetic conductive plate is gap-fitted with the inner wall of the piston outer cylinder 509, which is easy to assemble while ensuring coaxiality.

[0042] See also Figure 1-2 In one embodiment of the utility model, the cross-sectional area of ​​the magnetorheological fluid channel is determined to meet the damping force performance requirements of a specific shock absorber. The upper and lower ends of the piston outer cylinder 509 are provided with flanges for bending and spinning fixation. The upper end cover 6 has a central through hole, and the guide is provided at the center of the circle. A step is provided above the guide for installing a skeleton oil seal, and a groove is provided on the cylindrical wall for installing an O-ring. A guide ring is provided on the outer surface of the piston outer cylinder 509. The floating piston 2 is provided at the lower end portion near the cylinder body 3, and two grooves are provided on the side of the cylinder for installing an O-ring and a guide belt.

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0044] See also Figure 1-2 In one embodiment of the utility model, the magnetorheological shock absorber comprises a cylinder body 3, an upper end cover 6, a floating piston 2, a piston assembly 5, etc. The cylinder body 3 is a hollow structure, the upper end of the cylinder body 3 is open, the wall thickness is 2mm, and six countersunk bolt holes are attached to the sides of both ends, and the bolt holes are countersunk by 1mm. The upper end cover 6 and the lower end cover are sealed and installed at the upper and lower ends of the cylinder body 3, and are connected to the cylinder body 3 by six screws respectively; the lower end of the cylinder body 3 can also be set as an integral structure, and its upper end is open and closed by the upper end cover 6. The upper end of the cylinder body 3 is provided with six evenly arranged bolt holes. The upper end cover 6 is installed inside the cylinder body 3, and the upper end cover 6 has six threaded holes corresponding to the six bolt holes inside, thereby, the upper end cover 6 is positioned and installed in the cylinder body 3 and is at the upper end position through threaded connection, and a seal is formed between the upper end cover 6 and the cylinder body 3.

[0045] See also Figure 1-2In one embodiment of the utility model, a through hole is provided in the middle of the upper end cover 6, which is penetrated in the axial direction, and is used for the piston rod 506 to pass through. A skeleton oil seal and a guide ring are provided between the upper end cover 6 and the piston rod 506. The upper end cover 6 and the piston rod 506 form a dynamic seal through the skeleton oil seal. The skeleton oil seal can be a sealing ring. The guide ring can guide the movement of the piston rod 506, which is beneficial to improve the performance of the magnetorheological damper.

[0046] See also Figure 1-2 In one embodiment of the utility model, a damping medium is filled between the upper end cover 6 and the floating piston 2, and the damping medium is preferably a magnetorheological fluid. The piston assembly 5 is located inside the cylinder body 3, and divides the inner cavity of the cylinder body 3 into an upper cavity 7 and a lower cavity 4, and the upper cavity 7 and the lower cavity 4 are respectively located on the axial (upper and lower) sides of the piston assembly 5. One end of the piston rod 506 is fixedly connected to the piston assembly 5, and the other end passes through the upper cavity 7 and the upper end cover 6 in turn and extends out of the cylinder body 3 axially. In addition, a dynamic seal is formed between the piston rod 506 and the upper end cover 6, and the piston rod 506 can drive the piston assembly 5 to move axially in the inner cavity of the cylinder body 3 along the cylinder body 3.

[0047] See also Figure 1-2 In one embodiment of the present utility model, the piston assembly 5 includes a piston inner core assembly and an electromagnetic unit sleeved outside the piston inner core assembly, a piston end cover 1 504, a piston end cover 2 510, etc. The flow channel 513 of the magnetorheological fluid is arranged in the piston inner core assembly, and the cross-sectional area of ​​the flow channel 513 can be designed and modified according to different damping force requirements. Specifically, the piston assembly 5 includes a magnetic conductive plate 1 501, a magnetic conductive plate 2 502, a magnetic conductive plate 3 503, a piston end cover 1 504, a stop ring 505, a piston rod 506, a magnetic isolation ring 507, a piston core 508, a piston outer cylinder 509, a piston end cover 2 510, a coil 511, a pin 512, and a flow channel 513 of the magnetorheological fluid. The two ends of the flow channel 513 of the magnetorheological fluid are respectively connected with the upper cavity 7 and the lower cavity 4. The piston outer cylinder 509 is a cylindrical wall structure. The inner surface of the piston outer cylinder 509 is fitted and connected with the magnetic plate to achieve positioning; the inner wall of the piston outer cylinder 509 is respectively fitted with the coil 511. The coil 511 is arranged between the inner wall of the piston outer cylinder 509 and the outer wall of the magnetic isolation ring 507, and is pressed by the magnetic plate. The coils 511 are connected in series. When the coil 511 is energized, a magnetic field is generated, so that the magnetorheological fluid flow channel 513 is in the magnetic field area. By changing the energized current, the apparent viscosity of the magnetorheological fluid can be changed, and the current and force of the shock absorber can be controlled.

[0048] See also Figure 1-2In one embodiment of the present utility model, the free end (upper end in the figure) of the piston rod 506 is provided with an upper connecting thread, which can be connected to a ball joint for connecting to the frames of different vehicles. The lower end of the piston rod 506 is fixedly connected to the piston core 508. The lower end of the piston rod 506 is fixedly connected to the piston end cover 504 through a stop ring 505, so that the piston rod 506 is fixedly connected to the piston assembly 5.

[0049] See also Figure 1-2 In one embodiment of the present invention, the piston core 508 is made of a soft magnetic material with high saturation magnetic induction intensity. The magnetic isolation ring 507 is made of a material with good magnetic isolation, such as aluminum.

[0050] See also Figure 1-2 In one embodiment of the utility model, the coil 511 is used as an electromagnetic unit, and the coil 511 is embedded and wound on the magnetic isolation ring 507. When the coil 511 is energized, a magnetic field is generated, and a magnetic field is generated in the flow channel 513 of the magnetorheological fluid. This magnetic field can make the magnetorheological fluid in the flow channel 513 of the magnetorheological fluid produce a certain yield strength. The piston end cover 1 504 and the piston end cover 2 510 are provided with waist-shaped holes around the center, and the piston end cover 2 510 is provided with a wire groove for the wiring arrangement of the electromagnetic unit. The coil 511 excites a magnetic field in the magnetorheological fluid flow channel 513 that can be controlled by electric current. The apparent viscosity of the magnetorheological fluid can be changed by applying electric current, thereby providing a variable damping force.

[0051] See also Figure 1-2 In one embodiment of the utility model, the piston end cover 1 504 and the piston end cover 2 510 of the piston assembly 5 are pressed together by spinning, and a step is provided on the piston outer cylinder 509. When pressed together, the piston end cover 1 504 and the lower end cover press the step together, thereby ensuring the axial positioning and pressing of the coil 511 and the magnetic isolation ring 507. The piston end cover 2 510 may be provided with a pin 512 for fixing.

[0052] See also Figure 1-2 In one embodiment of the present utility model, a guide ring is embedded in the outer peripheral surface of the piston outer cylinder 509. The guide ring is conducive to the sliding fit between the piston assembly 5 and the cylinder body 3, and is conducive to ensuring the sealing effect of the dynamic seal formed between the piston assembly 5 and the inner wall of the cylinder body 3. This is very helpful to improve the damping adjustment performance of the magnetorheological damper. Guide rings are embedded between the upper end cover 6 and the piston rod 506 and on the outer peripheral surface of the piston cylinder to reduce the friction between the piston cylinder, the piston rod 506 and the cylinder wall, ensure the guiding ability, and reduce the lateral force.

[0053] See also Figure 1-2In one embodiment of the utility model, the magnetorheological damper also includes a volume compensation mechanism. The volume compensation mechanism is arranged inside the cylinder body 3 and at the lower end of the cylinder body 3, and is used to compensate for the volume increased or decreased in the cylinder body 3 during the movement of the piston rod 506. The volume compensation mechanism includes a floating piston 2, and an energy storage chamber 1 is formed between the floating piston 2 and the lower end of the cylinder body 3. The energy storage chamber 1 is filled with high-pressure inert gas to provide initial pressure for the system. In the process of the piston rod 506 entering and exiting the cylinder body 3 of the magnetorheological damper, the volume in the cylinder body 3 will change. The accumulator can compensate for the volume increased or decreased by the piston rod 506 entering and exiting the cylinder body 3, thereby effectively ensuring that the piston rod 506 can move normally. When the magnetorheological damper is in the compression process, the piston rod 506 gradually enters the cylinder body 3, and the volume of the piston rod 506 that enters reduces the volume in the cylinder body 3, and the pressure in the lower cavity 4 increases. At this time, the floating piston 2 moves downward. The reduced volume of the accumulator is the volume of the piston rod 506 entering the cylinder 3. When the magnetorheological damper is in the process of tension recovery, that is, the process of the piston rod 506 extending, as the piston rod 506 is pulled out, the volume in the cylinder 3 increases, the pressure of the upper cavity 7 increases, and the floating piston 2 is reset under the thrust of the high-pressure gas of the accumulator. In order to ensure the sealing between the floating piston 2 and the inner wall of the cylinder 3, a sealing ring and a guide ring are provided between the floating piston 2 and the inner wall of the cylinder 3.

[0054] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the claims of the utility model.

Claims

1. A magnetorheological shock absorber, characterized in that: include: A cylinder body (3), wherein one end of the cylinder body (3) is open, an upper end cover (6) is arranged in the opening, and the cylinder body (3) is filled with a damping medium; A piston assembly (5), the piston assembly (5) being slidably disposed in the cylinder body (3) and dividing the space in the cylinder body (3) into an upper cavity (7) and a lower cavity (4), the piston assembly (5) being provided with a flow channel (513) respectively communicating with the upper cavity (7) and the lower cavity (4), the piston assembly (5) comprising: A piston core (508), wherein the piston core (508) is made of a soft magnetic material with a high saturation magnetic induction intensity; A piston rod (506), one end of the piston rod (506) being fixedly connected to the piston core (508), and the other end of the piston rod (506) being movably connected to and extending through the upper end cover (6); A magnetic conductive plate, wherein a plurality of the magnetic conductive plates are sleeved on the piston core (508) at intervals; A magnetic isolation ring (507), the magnetic isolation ring (507) being located between two adjacent magnetic conductive plates and sleeved on the piston core (508); A piston outer cylinder (509), the piston outer cylinder (509) being sleeved on the outside of the magnetic conductive plate and slidably engaged with the inner wall of the cylinder body (3); A coil (511), wherein the coil (511) is arranged between the piston outer cylinder (509), the magnetic isolation ring (507) and the area enclosed by the magnetic conductive plate, and a plurality of coils (511) are connected in series; The piston end covers are arranged at both ends of the piston sleeve and are fixedly connected to the piston sleeve.

2. A magnetorheological shock absorber according to claim 1, characterized in that: The piston end cover is threadably matched with the piston outer cylinder (509).

3. A magnetorheological shock absorber according to claim 2, characterized in that: Both ends of the piston outer cylinder (509) are provided with step portions that cooperate with the piston end cover.

4. A magnetorheological shock absorber according to claim 3, characterized in that: The piston end cover comprises a piston end cover 1 (504) and a piston end cover 2 (510); a groove is provided at one end of the piston rod (506) located in the cylinder body (3); a stop ring (505) is provided in the groove; after the piston end cover 1 (504) and the piston outer tube (509) are tightened, the bottom surface of the piston end cover 1 (504) abuts against the stop ring (505).

5. A magnetorheological shock absorber according to claim 4, characterized in that: A floating piston (2) is slidably disposed at one end of the cylinder body (3) away from the upper end cover (6), and an energy storage chamber (1) is formed between the floating piston (2) and the cylinder body (3), and the energy storage chamber (1) is filled with an inert gas.

6. A magnetorheological shock absorber according to claim 5, characterized in that: A guide ring and a sealing ring are provided between the floating piston (2) and the inner wall of the cylinder body (3).

7. The magnetorheological shock absorber according to claim 1, characterized in that: A step structure cooperating with the magnetic isolation ring (507) is arranged on the inner side of the magnetic conductive plate.

8. The magnetorheological shock absorber according to claim 1, characterized in that: Guide rings are respectively provided between the piston outer tube (509) and the cylinder body (3), and between the piston rod (506) and the upper end cover (6).

9. The magnetorheological shock absorber according to claim 1, characterized in that: The damping medium is magnetorheological fluid.

10. The magnetorheological shock absorber according to claim 1, characterized in that: One end of the piston rod (506) located outside the cylinder body (3) is provided with a thread for connecting to a ball joint.

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