Multi-coil multi-working-mode double-cylinder magnetorheological damper

Abstract

The utility model discloses a multi-coil multi-working-mode double-barrel magneto-rheological shock absorber which comprises an outer cylinder body, an inner cylinder body, a magneto-rheological valve body and a piston assembly. The magneto-rheological valve body is arranged in the outer cylinder body and comprises a valve middle body, at least one valve left body is arranged on the left side of the valve middle body, at least one valve right body is arranged on the right side of the valve middle body, and an electromagnetic coil is arranged on the magneto-rheological valve body; the piston assembly comprises a piston rod and a sliding piston. The piston rod penetrates through the magnetorheological valve body to drive the sliding piston to slide in the inner cylinder barrel. Damping channels are arranged between the outer cylinder body and the magneto-rheological valve bodies, between every two adjacent magneto-rheological valve bodies and between the outer cylinder body and the inner cylinder barrel. The double-layer cylinder barrel design is adopted, the control range of output damping force of the magneto-rheological valve is enlarged, an electromagnetic coil wire can be connected more conveniently, the sealing performance is excellent, multiple control modes can be applied, the problem that application of a traditional magneto-rheological valve is limited is effectively solved, and application and popularization of the magneto-rheological technology in the vibration reduction field are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration suppression, in particular to a multi-coil multi-working mode double-tube magnetorheological shock absorber. Background Art

[0002] Magnetorheological technology is a kind of active vibration reduction control, which uses the characteristics of magnetorheological fluid that the shear yield stress changes under the action of a magnetic field to achieve the purpose of active vibration reduction control. Magnetorheological technology is widely used in the field of vibration suppression, and outputs damping force to achieve vibration reduction effect.

[0003] However, the output damping force of traditional magnetorheological valve dampers cannot be adjusted, the working mode is single, and the application scenarios are limited, which greatly affects the application of magnetorheological technology in the field of vibration reduction.

[0004] The inventor applied for Chinese patents previously, namely, Chinese invention patent with publication number CN110778636A, which discloses a bidirectional independently controllable magnetorheological damper; Chinese invention patent with publication number CN110925349A, which discloses a self-sensing separated double-tube magnetorheological damper; Chinese invention patent with publication number CN110822009A, which discloses a separated double-tube magnetorheological damper. The above three invention patents have two electromagnetic coils, whose damping force is large in tension and small in compression, and the tension and compression are independently adjusted, but one structure cannot achieve damping force output in different working states, such as symmetrical output, large compression force, small tension force, narrow application scenarios, and relatively rigid settings.

[0005] Therefore, in order to solve the above technical problems, the utility model redesigns the internal structure of the traditional magnetorheological damper and adopts a double-layer cylinder design. Unlike the previous situation where the valve body moves with the piston rod, the valve body and the coil are fixed in the outer cylinder. The movement of the piston rod drives the magnetorheological fluid to flow through the magnetic field area generated by the coil on the valve body, thereby generating a magnetorheological damping force to meet the requirements of the corresponding working conditions. This structure greatly increases the control range of the output damping force of the magnetorheological valve, makes it easier to lead out the wire of the electromagnetic coil, has excellent sealing performance, and can use a variety of control methods. It is suitable for a variety of occasions, effectively solving the problem of limited application of traditional magnetorheological valves, and is conducive to the application and promotion of magnetorheological technology in the field of vibration reduction. Utility Model Content

[0006] In view of this, the utility model provides a multi-coil and multi-working mode double-cylinder magnetorheological shock absorber, which adopts a double-layer cylinder design, fixes the valve body and the coil in the outer cylinder, and the movement of the piston rod drives the magnetorheological fluid to flow through the magnetic field area generated by the coil on the valve body, thereby generating a magnetorheological damping force, greatly increasing the control range of the magnetorheological valve output damping force.

[0007] The utility model provides a multi-coil multi-working mode double-tube magnetorheological shock absorber adopts the following technical solution:

[0008] A multi-coil multi-working mode double-tube magnetorheological shock absorber, comprising:

[0009] An outer cylinder body and an inner cylinder body arranged in the outer cylinder body, wherein the outer cylinder body and the inner cylinder body form a double cylinder structure;

[0010] A magnetorheological valve body, wherein the magnetorheological valve body is fixedly arranged in the outer cylinder body, the magnetorheological valve body comprises a valve middle body, at least a valve left body is arranged on the left side of the valve middle body, and at least a valve right body is arranged on the right side of the valve middle body, and an electromagnetic coil is correspondingly arranged on the magnetorheological valve body, and each of the electromagnetic coils can be individually closed or connected and the corresponding current size can be adjusted to achieve a change in the damping force output;

[0011] A piston assembly, the piston assembly comprising a piston rod and a sliding piston, the piston rod passing through the magnetorheological valve body and capable of driving the sliding piston to slide in the inner cylinder;

[0012] A damping channel for the magnetorheological fluid to flow is provided between the outer cylinder and the magnetorheological valve body, between two adjacent magnetorheological valve bodies, and between the outer cylinder and the inner cylinder.

[0013] The magnetorheological valve body is provided with an intermediate channel communicating with the damping channel, and the intermediate channels on the left valve body and the right valve body are both provided with a one-way valve;

[0014] A floating piston is provided in the inner cylinder and is slidably matched with the right side of the damping channel of the inner cylinder.

[0015] Optionally, the magnetorheological valve body is provided with an intermediate channel communicating with the damping channel, and the intermediate channels on the left valve body and the right valve body are both provided with a one-way valve;

[0016] When the magnetorheological fluid flows from right to left, the one-way valve of the left valve body is driven to close the middle channel of the left valve body;

[0017] When the magnetorheological fluid flows from left to right, the one-way valve of the right valve body is driven to close the middle channel of the right valve body.

[0018] Optionally, the one-way valve includes a ball and an elastic member, the middle channel is a tapered through hole, the ball is arranged in the tapered through hole through the elastic member, the elastic member is used to apply a preload force to the ball in the direction of the small end close to the tapered through hole, so as to drive the ball to close the small end of the tapered through hole, and when the piston rod of the piston assembly is stretched and compressed, the ball is located at different positions in the tapered through hole under the action of the liquid pressure and the preload force of the spring, thereby opening or closing the middle flow channel of the magnetorheological valve body.

[0019] Optionally, an air chamber is formed between the right side of the floating piston and the inner cylinder, and the inner cylinder is provided with an air charging port connected to the air chamber.

[0020] Optionally, the outer cylinder body includes an outer cylinder barrel, a left end cover arranged on the left side of the outer cylinder barrel, and a right end cover arranged on the right side of the outer cylinder barrel, the left end cover is threadedly connected to the outer cylinder barrel, the right end cover is fixedly connected to the outer cylinder barrel, a right lifting ear is arranged on the right side of the right end cover, a left lifting ear is arranged on the piston rod of the piston assembly, and the inflation port is located at the right end cover.

[0021] Optionally, a wire connector is provided on the left end cover, and the wire is wound around the magnetorheological valve body through the wire connector to form an electromagnetic coil.

[0022] Optionally, the valve body has a left valve body and a right valve body symmetrically distributed along the axial direction of the electromagnetic coil of the valve body, and the left valve body and the right valve body are respectively provided with a plurality of conical through holes symmetrically along their own circumferential directions.

[0023] Optionally, a limiting portion 1 is provided on the right side of the valve body, and the limiting portion 1 is used to radially position the right valve body; a limiting portion 2 is provided on the right side of the valve body, and the limiting portion 2 is used to radially position the inner cylinder; a limiting portion 3 is provided on the right side of the valve body, and the limiting portion 3 is used to radially position the valve body.

[0024] Optionally, a guide ring is provided on the left end cover, and the guide ring is used to guide the piston rod of the piston assembly.

[0025] Optionally, a sealing ring 1 is provided between the right end cover and the inner cylinder.

[0026] In summary, the utility model includes at least one of the following beneficial technical effects: adopting a double-cylinder design, different from the previous situation where the valve body moves with the piston rod, the valve body and the coil are fixed in the outer cylinder, and the movement of the piston rod drives the magnetorheological fluid to flow through the magnetic field area generated by the coil on the valve body, thereby generating a magnetorheological damping force to meet the requirements of the corresponding working conditions. This structure greatly increases the control range of the output damping force of the magnetorheological valve, and at the same time has excellent airtightness, and can use a variety of control methods, suitable for a variety of occasions, effectively solving the problem of limited application of traditional magnetorheological valves, and is conducive to the application and promotion of magnetorheological technology in the field of vibration reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the overall structure of the left piston body of the embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the overall structure of the piston body in an embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the overall structure of the right piston body of the utility model embodiment;

[0031] Figure 5 It is the flow path when the piston rod of the magnetorheological damper of the embodiment of the utility model is stretched;

[0032] Figure 6 It is the flow path when the piston rod of the magnetorheological shock absorber of the embodiment of the utility model is compressed;

[0033] Figure 7 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is stretched after the left valve body and the middle valve body coils of the utility model are energized;

[0034] Figure 8 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is compressed after the left valve body and the middle valve body coils of the utility model are energized;

[0035] Fig. 9 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is stretched after the valve middle body and the valve right body coil are energized in the embodiment of the utility model;

[0036] Fig.10 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is compressed after the valve middle body and the valve right body coil of the embodiment of the utility model are energized;

[0037] Fig.11 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is stretched after the left valve body and the right valve body coils of the embodiment of the utility model are energized;

[0038] Fig.12 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is compressed after the left valve body and the right valve body coils of the embodiment of the utility model are energized;

[0039] Fig.13 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is stretched after the valve body is energized in the embodiment of the utility model;

[0040] Fig.14 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is compressed after the valve body is energized in the embodiment of the utility model;

[0041] Fig.15 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is stretched after the valve left body, valve middle body and valve right body of the embodiment of the utility model are all powered on;

[0042] Fig.16 It is the flow path of the magnetorheological fluid when the shock absorber piston rod is compressed after the left valve body, the middle valve body and the right valve body of the embodiment of the utility model are all powered on.

[0043] Explanation of the reference numerals in the accompanying drawings: 1. left lifting ear; 2. piston rod; 3. sealing ring 2; 4. guide copper ring; 5. left end cover; 6. wire connector; 7. outer cylinder; 8. left valve body; 9. ball bearing; 10. coil; 11. spiral spring; 12. valve body; 13. right valve body; 14. positioning seat; 15. inner cylinder; 16. sliding piston; 17. floating piston; 18. magnetorheological fluid; 19. nitrogen; 20. right end cover; 21. charging valve; 22. right lifting ear; 23. sealing ring 1; 24. damping channel. DETAILED DESCRIPTION

[0044] The following is combined with Figure 1-16 The utility model is described in further detail.

[0045] The utility model embodiment discloses a multi-coil multi-working mode double-tube magnetorheological shock absorber based on flow mode.

[0046] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A multi-coil multi-working mode double-tube magnetorheological shock absorber based on flow mode includes an outer cylinder body and an inner cylinder body arranged in the outer cylinder body, a magnetorheological valve body and a piston assembly. The outer cylinder body and the inner cylinder body form a double-cylinder structure. The magnetorheological valve body is fixedly arranged in the outer cylinder body. The magnetorheological valve body includes a valve body 12. At least a left valve body 8 is arranged on the left side of the valve body 12, and at least a right valve body 13 is arranged on the right side of the valve body 12. Electromagnetic coils 10 are correspondingly arranged on the magnetorheological valve body. By passing corresponding currents into the electromagnetic coils 10 on different magnetorheological valve bodies, the damping force output is changed; the piston assembly includes a piston rod 2 and a sliding piston 16. The piston rod 2 passes through the magnetorheological valve body sliding piston 16 and is driven to slide and fit in the inner cylinder 15; a damping channel 24 for the magnetorheological fluid 18 to flow is arranged between the outer cylinder body and the magnetorheological valve body, between two adjacent magnetorheological valve bodies, and between the outer cylinder body and the inner cylinder 15.

[0047] The double-tube design is adopted. Different from the previous situation where the valve body moves with the piston rod 2, the valve body and the coil 10 are fixed to the outer cylinder 7. The movement of the piston rod 2 drives the magnetorheological fluid 18 to flow through the magnetic field area generated by the coil 10 on the valve body, thereby generating a magnetorheological damping force to meet the requirements of the corresponding working conditions. This structure greatly increases the control range of the output damping force of the magnetorheological valve, and at the same time has excellent airtightness, and can use a variety of control methods. It is suitable for a variety of occasions, effectively solving the problem of limited application of traditional magnetorheological valves, and is conducive to the application and promotion of magnetorheological technology in the field of vibration reduction.

[0048] The outer cylinder body includes an outer cylinder barrel 7, a left end cover 5 arranged on the left side of the outer cylinder barrel 7 and a right end cover 20 arranged on the right side of the outer cylinder barrel 7. The left end cover 5 is threadedly connected to the outer cylinder barrel 7, the right end cover 20 is fixedly connected to the outer cylinder barrel 7, a right lifting ear 22 is arranged on the right side of the right end cover 20, and a left lifting ear 1 is arranged on the piston rod 2 of the piston assembly.

[0049] In this embodiment, a positioning seat 14 is provided on the left side of the inner cylinder body, and the inner cylinder barrel 15 is connected to the positioning seat 14 through threads, and is axially positioned by contacting with the end surface of the right end cover 20 .

[0050] In this embodiment, the left end cover 5 is connected to the outer cylinder 7 by threads; the right end cover 20 is connected to the outer cylinder 7 by welding; the left lifting ear 1 is connected to the piston rod 2 by threads; the right lifting ear 22 is connected to the right end cover 20 by welding; the piston rod 2 is connected to the piston by threads, and a shoulder is provided on the piston rod 2, which is accurately connected by cooperating with the left end face of the piston.

[0051] A floating piston 17 is provided in the inner cylinder 15 and on the right side of the damping passage 24 of the inner cylinder 15 in a sliding manner. An air chamber is formed between the right side of the floating piston 17 and the inner cylinder 15. An air charging port connected to the air chamber is provided on the inner cylinder 15. In this embodiment, an air charging valve 21 is provided on the air charging port. The shock absorber is inflated through the air charging port; in this embodiment, nitrogen 19 is injected into the air charging port, and an air charging valve 21 is provided on the right end cover 20. The floating piston 17 is used to perform gas compensation on the shock absorber as a whole through the air charging port.

[0052] A limiting portion 1 is provided on the right side of the valve body 12, and the limiting portion 1 is used to radially position the valve right body 13; a limiting portion 2 is provided on the right side of the valve right body 13, and the limiting portion 2 is used to radially position the inner cylinder 15; a limiting portion 3 is provided on the right side of the valve left body 8, and the limiting portion 3 is used to radially position the valve body 12. Specifically, a groove is provided on the left end cover 5, which is used to cooperate with the boss on the valve left body 8 to achieve radial positioning of the valve left body 8; a circumferentially arranged groove is provided on the right side of the valve left body 8, which is used to cooperate with the boss on the left side of the valve body 12 to achieve radial positioning of the valve body 12; a circumferentially arranged boss is provided on the right side of the valve body 12, which is used to cooperate with the groove on the left side of the valve right body 13 to achieve radial positioning of the valve right body 13; a circumferentially arranged groove is provided on the right side of the valve right body 13, which is used to cooperate with the boss on the left side of the positioning seat 14 to achieve radial positioning of the positioning seat 14, thereby achieving radial positioning of the shock absorber inner cylinder 15.

[0053] A through hole is provided on the wall of the inner cylinder 15 of the shock absorber to realize the flow of the magnetorheological fluid 18, and a step is provided on the inner wall to limit the movement of the floating piston 17 to avoid affecting the flow of the magnetorheological fluid 18 in the through hole;

[0054] The shock absorber inner cylinder 15 is connected to the positioning seat 14 by threads, and is axially positioned by contacting the end surface of the right end cover 20;

[0055] A wire connector 6 is provided on the left end cover 5 , and a wire is wound around the magnetorheological valve body through the wire connector 6 to form an electromagnetic coil 10 .

[0056] A sealing ring 23 is provided between the right end cover 20 and the inner cylinder 15 to prevent gas leakage.

[0057] A through hole is provided in the middle of the left end cover 5 for the piston rod 2 to slide axially, and a guide ring and a sealing ring 3 are provided on the side walls of the through hole. In the present embodiment, the guide ring is a guide copper ring 4, which is used to provide guidance for the sliding of the piston rod 2, and the sealing ring 3 is used to improve the sealing between the piston rod 2 and the left end cover 5.

[0058] The one-way valve includes a ball 9 and an elastic member. The middle channel is a tapered through hole. The ball 9 is arranged in the tapered through hole through the elastic member. The elastic member is used to apply a preload force to the ball 9 in the direction of the small end close to the tapered through hole to drive the ball 9 to close the small end of the tapered through hole. When the piston rod 2 of the piston assembly is stretched and compressed, the ball 9 is located at different positions of the tapered through hole under the action of the hydraulic pressure and the preload force of the spring, thereby opening or closing the middle flow channel of the magnetorheological valve body.

[0059] The magnetorheological valve body is provided with an intermediate channel communicating with the damping channel 24, and the intermediate channels on the left valve body 8 and the right valve body 13 are both provided with a one-way valve;

[0060] When the magnetorheological fluid 18 flows from right to left, the one-way valve of the left valve body 8 is driven to close the middle channel of the left valve body 8;

[0061] When the magnetorheological fluid 18 flows from left to right, the one-way valve of the right valve body 13 is driven to close the middle channel of the right valve body 13 .

[0062] The valve middle body 12 is symmetrically distributed with the valve left body 8 and the valve right body 13 along the axial direction of the electromagnetic coil 10 of the valve middle body 12 . The valve left body 8 and the valve right body 13 are symmetrically provided with a plurality of conical through holes along their own circumferential directions.

[0063] In this embodiment, four conical through holes are symmetrically arranged along the circumference of the left valve body 8, and a ball 9 is arranged in each through hole, which cooperates with the coil spring 11 to act as a one-way valve; four conical through holes are symmetrically arranged along the circumference of the right valve body 13, and a ball 9 is arranged in each through hole, which cooperates with the coil spring 11 to act as a one-way valve.

[0064] The utility model is different from the conventional valve body that moves with the piston rod 2. The magnetorheological valve body of the utility model is fixed in the shock absorber cylinder, which effectively avoids damage to the magnetorheological valve body during the movement of the piston rod 2 and increases the service life of the valve body.

[0065] In this embodiment, the valve body is composed of three parts, each part has a corresponding electromagnetic coil 10 structure, and the magnetorheological damper is placed in different working modes by passing corresponding currents through the coils 10 on different valve bodies.

[0066] The utility model connects the corresponding electromagnetic coils 10 on the three magnetorheological valve bodies and passes the corresponding current, so that the magnetorheological damper is in different working modes, realizes the change of damping force output, and thus produces different magnetorheological effects to achieve the vibration reduction effect under various working conditions. By changing whether the electromagnetic coils 10 at each level are energized to meet various needs, the working application range of the magnetorheological valve is greatly improved, and the processing and manufacturing cost is reduced. Corresponding currents are passed through different electromagnetic coils 10 to put the magnetorheological damper in different working modes, as shown below:

[0067] Mode 1: When the electromagnetic coil 10 of the valve left body 8 and the valve middle body 12 is energized, under the same current input, the damping force of the extension stroke is small, and the damping force of the compression stroke is large.

[0068] Reference Figure 7During the stretching stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the left valve body 8, but the magnetorheological fluid 18 that enters the magnetorheological valve body through the middle channel is not within the magnetic field range of the left valve body 8, so no magnetic damping force is generated.

[0069] Reference Figure 8 In the compression stroke, since the one-way valve of the left valve body 8 is in a closed state, the magnetorheological fluid 18 entering the magnetorheological valve body can only flow out from the circumferential channel. Therefore, the magnetorheological fluid 18 entering the magnetorheological valve body all flows through the magnetic field range of the left valve body 8 and the coil 10 on the middle body, and outputs a larger damping force outward.

[0070] Mode 2: The electromagnetic coils 10 of the valve center body 12 and the valve right body 13 are energized. At this time, under the same current input, the damping force of the extension stroke is large, and the damping force of the compression stroke is small.

[0071] Reference Fig. 9 During the stretching stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the piston. Since the one-way valve of the right valve body 13 is in a closed state, the magnetorheological fluid 18 entering the magnetorheological valve body can only flow out from the circumferential channel. Therefore, the magnetorheological fluid 18 entering the magnetorheological valve body all flows through the magnetic field range of the valve middle body 12 and the coil 10 on the right body, and outputs a larger damping force outward.

[0072] Reference Fig.10 During the compression stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the right valve body 13. However, the magnetorheological fluid 18 entering the magnetorheological valve body through the middle channel is not within the magnetic field range of the right valve body 13, so no magnetic damping force is generated.

[0073] Mode three: the electromagnetic coils 10 of the left valve body 8 and the right valve body 13 are energized. At this time, under the same current input, the damper outputs equal damping forces in the extension and compression strokes.

[0074] Reference Fig.11 During the stretching stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the left valve body 8, but the magnetorheological fluid 18 that enters the magnetorheological valve body through the middle channel is not within the magnetic field range of the left valve body 8, so no magnetic damping force is generated.

[0075] Reference Fig.12 During the compression stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the right valve body 13. However, the magnetorheological fluid 18 entering the magnetorheological valve body through the middle channel is not within the magnetic field range of the right valve body 13, so no magnetic damping force is generated.

[0076] Mode 4: Only the solenoid coil 10 of the valve body 12 is energized

[0077] Reference Fig.13 , Fig.14 The main body 12 in the valve generates a larger damping force, and outputs symmetrical damping force under the same current input during the extension and compression strokes.

[0078] Mode 5: All electromagnetic coils 10 of the left valve body 8, the middle valve body 12 and the right valve body 13 are energized

[0079] Reference Fig.15 During the stretching stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the left valve body 8 .

[0080] Reference Fig.16 During the compression stroke, the magnetorheological fluid 18 enters the magnetorheological valve body from the middle channel and the circumferential channel of the right valve body 13 .

[0081] In the extension and compression strokes, symmetrical damping force is output under the same current input.

[0082] Among them, mode three, mode four, and mode five all output the same damping force in the extension and compression strokes, among which mode four has the smallest damping force output, and mode five has the largest damping force output.

[0083] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A multi-coil multi-working mode double-tube magnetorheological shock absorber, Features: include: An outer cylinder body and an inner cylinder body arranged in the outer cylinder body, wherein the outer cylinder body and the inner cylinder body form a double cylinder structure; A magnetorheological valve body, wherein the magnetorheological valve body is fixedly arranged in the outer cylinder body, the magnetorheological valve body comprises a valve middle body, at least a valve left body is arranged on the left side of the valve middle body, and at least a valve right body is arranged on the right side of the valve middle body, and an electromagnetic coil is correspondingly arranged on the magnetorheological valve body, and each of the electromagnetic coils can be individually closed or connected and the corresponding current size can be adjusted to achieve a change in the damping force output; A piston assembly, the piston assembly comprising a piston rod and a sliding piston, the piston rod passing through the magnetorheological valve body and capable of driving the sliding piston to slide in the inner cylinder; A damping channel for the magnetorheological fluid to flow is provided between the outer cylinder and the magnetorheological valve body, between two adjacent magnetorheological valve bodies, and between the outer cylinder and the inner cylinder. The magnetorheological valve body is provided with an intermediate channel communicating with the damping channel, and the intermediate channels on the left valve body and the right valve body are both provided with a one-way valve; A floating piston is provided in the inner cylinder and is slidably matched with the right side of the damping channel of the inner cylinder.

2. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 1, Features: When the magnetorheological fluid flows from right to left, the one-way valve of the left valve body is driven to close the middle channel of the left valve body; When the magnetorheological fluid flows from left to right, the one-way valve of the right valve body is driven to close the middle channel of the right valve body.

3. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 2, Features: The one-way valve includes a ball and an elastic member, the middle channel is a tapered through hole, the ball is arranged in the tapered through hole through the elastic member, the elastic member is used to apply a preload force to the ball in the direction of the small end close to the tapered through hole, so as to drive the ball to close the small end of the tapered through hole, and when the piston rod of the piston assembly is stretched and compressed, the ball is placed in different positions of the tapered through hole under the action of the hydraulic pressure and the preload force of the spring, thereby opening or closing the middle flow channel of the magnetorheological valve body.

4. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to any one of claims 1 to 3, Features: An air chamber is formed between the right side of the floating piston and the inner cylinder, and an air charging port communicating with the air chamber is arranged on the inner cylinder.

5. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 4, Features: The outer cylinder body includes an outer cylinder barrel, a left end cover arranged on the left side of the outer cylinder barrel and a right end cover arranged on the right side of the outer cylinder barrel, the left end cover is threadedly connected to the outer cylinder barrel, the right end cover is fixedly connected to the outer cylinder barrel, a right lifting ear is arranged on the right side of the right end cover, a left lifting ear is arranged on the piston rod of the piston assembly, and the inflation port is located at the right end cover.

6. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 5, Features: The left end cover is provided with a wire connector, and the wire is wound around the magnetorheological valve body through the wire connector to form an electromagnetic coil.

7. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 1, Features: The valve middle body has a left valve body and a right valve body symmetrically distributed along the axial direction of the electromagnetic coil of the valve middle body, and the left valve body and the right valve body are respectively provided with a plurality of conical through holes symmetrically along their own circumferential directions.

8. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 1, Features: A limiting portion 1 is arranged on the right side of the valve body, and the limiting portion 1 is used for radially positioning the right valve body; a limiting portion 2 is arranged on the right side of the valve body, and the limiting portion 2 is used for radially positioning the inner cylinder; a limiting portion 3 is arranged on the right side of the valve body, and the limiting portion 3 is used for radially positioning the valve body.

9. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 5, Features: The left end cover is provided with a guide ring, and the guide ring is used to guide the piston rod of the piston assembly.

10. The multi-coil multi-working mode double-tube magnetorheological shock absorber according to claim 5, Features: A sealing ring 1 is arranged between the right end cover and the inner cylinder.

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