Magneto-rheological shock absorber and vehicle

Abstract

The invention discloses a magneto-rheological shock absorber and a vehicle, and relates to the technical field of vehicle shock absorbing.The magneto-rheological shock absorber is additionally provided with a first circulation cavity and a second circulation cavity, magnetic fields are applied to magneto-rheological fluid through a first electromagnetic induction assembly and a second electromagnetic induction assembly, the damping adjusting range of the magneto-rheological shock absorber is widened, and the damping effect of the magneto-rheological shock absorber is improved. The first electromagnetic induction assembly and the second electromagnetic induction assembly can independently or jointly adjust the viscosity of the magnetorheological fluid, adjustment of a larger damping range of the magnetorheological damper can be achieved, and then the requirements for comfort and controllability of a vehicle under a larger vibration scale can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle vibration reduction, and in particular to a magnetorheological vibration reducer and a vehicle. Background Art

[0002] When a vehicle is driving, the vehicle body often vibrates because the terrain on which the wheels are in contact is not stable. In order to reduce the vibration transmitted from the wheels to the vehicle body, a shock absorber is usually set between the two to ensure the smooth operation of the vehicle.

[0003] In the related art, the magnetorheological shock absorber includes a cylinder body, a piston rod and an electromagnetic induction component. One end of the piston rod is connected to the vehicle body. A chamber is provided in the cylinder body, and the chamber is filled with magnetorheological fluid. The piston rod passes through the chamber and is movably arranged along the length direction of the chamber. The electromagnetic induction component is arranged in the chamber. When power is turned on, a magnetic field is applied to the magnetorheological fluid in the chamber to increase the viscosity of the magnetorheological fluid, change the fluidity of the magnetorheological fluid, and adjust the damping of the piston rod, thereby ensuring the smooth operation of the vehicle.

[0004] However, since the magnetic field is applied to the magnetorheological fluid through a single electromagnetic induction component in a single chamber, the damping adjustment range of the piston rod is limited, which is not conducive to achieving a larger damping range adjustment of the piston rod, and further is not conducive to meeting the vehicle's handling and comfort requirements under larger vibration scales. Summary of the invention

[0005] The main purpose of the present invention is to propose a magnetorheological shock absorber and a vehicle, aiming to achieve adjustment of a larger damping range of the magnetorheological shock absorber, thereby meeting the vehicle's controllability and comfort requirements under a larger vibration scale.

[0006] To achieve the above-mentioned object, the present invention provides a magnetorheological damper, which includes a cylinder assembly, a piston rod, a first electromagnetic induction assembly and a second electromagnetic induction assembly, wherein the cylinder assembly is formed with an active chamber, a first flow chamber and a second flow chamber respectively connected to the active chamber, and a compensation chamber respectively connected to the first flow chamber and the second flow chamber on a side away from the active chamber; One end of the piston rod is inserted into the active chamber and reciprocates along the axial direction of the active chamber; one end of the piston rod divides the active chamber into a first working chamber and a second working chamber, the first working chamber is connected to the first circulation chamber, the second working chamber is connected to the second circulation chamber, the first working chamber and the second working chamber are filled with magnetorheological fluid, so as to be fluidically connected to the compensation chamber respectively, and the compensation chamber is filled with compensation gas; The first electromagnetic induction component is arranged in the first circulation chamber to apply a magnetic field to the magnetorheological fluid passing through the first circulation chamber; the second electromagnetic induction component is arranged in the second circulation chamber to apply a magnetic field to the magnetorheological fluid passing through the second circulation chamber; the magnetorheological fluid drives the piston rod to reciprocate in cooperation with the first electromagnetic induction component and the second electromagnetic induction component.

[0007] In one embodiment, the cylinder assembly includes a tube assembly, a first bypass assembly and a second bypass assembly, the tube assembly forms the active chamber and the compensation chamber, the first bypass assembly is connected to one side of the tube assembly and forms the first flow chamber, the second bypass assembly is connected to the other side of the tube assembly and forms the second flow chamber, the cavity wall of the second working chamber is provided with a liquid hole communicating with the second flow chamber, the cavity wall of the first working chamber is provided with a first channel communicating with the first flow chamber, and the first channel and the liquid hole are spaced apart in the vertical direction.

[0008] In one embodiment, the first bypass assembly includes a first bypass pipe and a first cover plate, one end of the first bypass pipe is connected to one side of the tube body assembly, and the first cover plate is detachably connected to the other end of the first bypass pipe to enclose the first bypass pipe to form the first flow chamber.

[0009] In one embodiment, the first bypass pipe is connected to the pipe body assembly in a downwardly inclined manner in a vertical direction. In one embodiment, the second bypass assembly comprises a second bypass pipe and a second cover plate, one end of the second bypass pipe is connected to one side of the pipe body assembly, and the second cover plate is detachably connected to the other end of the second bypass pipe to enclose the second bypass pipe to form the second flow chamber.

[0010] In one embodiment, the tube body assembly includes a base, a first tube body, a second tube body, a third tube body and a sealing cover, wherein the first tube body, the second tube body and the third tube body are concentrically nested from the inside to the outside, and the base and the sealing cover are respectively connected to the openings on both sides of the first tube body, the second tube body and the third tube body; The first tube body, the base and the sealing cover together form the active chamber, the first tube body, the second tube body, the base and the sealing cover together form a buffer chamber, one end of the buffer chamber is connected to the liquid hole, and the other end is provided with a second channel connected to the second flow chamber, the second tube body, the third tube body, the base and the sealing cover together form the compensation chamber, and the cavity wall of the compensation chamber is penetrated by two third channels arranged at intervals, one of the third channels is connected to the first flow chamber, and the other third channel is connected to the second flow chamber.

[0011] In one embodiment, there are a plurality of the liquid passage holes, and the plurality of liquid passage holes are spaced apart along the circumference of the first tube body.

[0012] In one embodiment, the first channel includes a first section and a second section that are connected, one end of the first section is connected to the active chamber, one end of the second section is connected to the first flow chamber, and the second section is arranged at an angle to the first section.

[0013] In one embodiment, the magnetorheological damper further includes a floating piston, which is movably arranged along the depth direction of the compensation chamber, and the side of the floating piston facing the third channel is filled with the magnetorheological fluid, and the other side is filled with the compensation gas.

[0014] The present invention also proposes a vehicle, which includes a body, wheels and the magnetorheological shock absorber as described above, wherein the end of the piston rod extending out of the active chamber is connected to the body; the wheel is connected to the side of the cylinder assembly facing away from the piston rod.

[0015] In the technical solution of the present invention, the end of the piston rod is inserted into the movable chamber and is movably arranged along the extension direction of the movable chamber, thereby dividing the movable chamber into a first working chamber and a second working chamber. Since the first electromagnetic induction component is arranged in the first circulation chamber, the viscosity of the magnetorheological fluid in the first circulation chamber can be adjusted by controlling the current of the first electromagnetic induction component, thereby changing the overall fluidity of the magnetorheological fluid in each chamber, and then adjusting the damping force of the magnetorheological fluid on the piston rod. Similarly, since the second electromagnetic induction component is arranged in the second circulation chamber, the viscosity of the magnetorheological fluid in the second circulation chamber can be adjusted by controlling the current of the second electromagnetic induction component, thereby changing the overall fluidity of the magnetorheological fluid in each chamber, and then adjusting the damping force of the magnetorheological fluid on the piston rod to ensure the smooth movement of the vehicle.

[0016] Therefore, the magnetorheological shock absorber of the present invention is additionally provided with a first flow chamber and a second flow chamber, and a magnetic field is applied to the magnetorheological fluid through the first electromagnetic induction component and the second electromagnetic induction component respectively, thereby increasing the damping adjustment range of the piston rod, and the first electromagnetic induction component and the second electromagnetic induction component can adjust the viscosity of the magnetorheological fluid individually or jointly, which is conducive to achieving adjustment of a larger damping range of the magnetorheological shock absorber, and is conducive to meeting the comfort and controllability requirements of the vehicle under a larger vibration scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic cross-sectional structure diagram of a piston rod of a magnetorheological shock absorber provided by the present invention in a downward moving state; Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 3 for Figure 1 The schematic cross-sectional structure diagram of the magnetorheological shock absorber is shown in the state where the piston rod is in an upward movement state; Figure 4 for Figure 1 Front view of the half-section structure of the floating piston.

[0019] Description of the accompanying drawings: 10, magnetorheological damper; 1, tube assembly; 11, first tube; 111, active chamber; 1111, first working chamber; 1113, second working chamber; 1114, first channel; 11141, first section; 11143, second section; 1115, liquid hole; 1116, magnetorheological fluid; 12, second tube; 121, buffer chamber; 1211, second channel; 13, third tube; 131, compensation chamber; 1311, third channel; 133, compensation gas; 14, base; 15, sealing cover; 31, first bypass assembly; 311, first bypass pipe; 313, first cover plate; 3 15. first circulation chamber; 33. second bypass assembly; 331. second bypass pipe; 333. second cover plate; 335. second circulation chamber; 5. piston rod; 51. rod body; 53. head; 61. first electromagnetic induction assembly; 611. mounting assembly; 6111. cylinder body; 6113. end cover; 6115. magnetization chamber; 6116. magnetization channel; 613. iron core; 614. coil; 6141. mounting groove; 615. connecting rod; 616. wire assembly; 617. oil seal; 63. second electromagnetic induction assembly; 71. floating piston; 711. sealing groove; 73. guide sleeve; 75. sealing ring; 8. connecting frame.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0024] When a vehicle is driving, the vehicle body often vibrates because the terrain on which the wheels are in contact is not stable. In order to reduce the vibration transmitted from the wheels to the vehicle body, a shock absorber is usually set between the two to ensure the smooth operation of the vehicle.

[0025] MR dampers are a key component of the vehicle suspension system, responsible for absorbing and controlling vibrations and shocks caused by uneven road conditions. The piston rod is an important part of the MR damper, usually connected to the wheel and fixed to the vehicle body frame at one end. When the wheel encounters uneven road conditions, the piston rod moves up and down, causing the MR fluid to pass through the small holes or gaps inside the MR damper. As the piston rod moves, the MR fluid is squeezed and passes through the small holes or gaps inside the damper, creating resistance. The local pressure can be controlled by adjusting the magnetic field strength inside the MR damper, thereby changing the flowability of the MR fluid.

[0026] In the related art, the magnetorheological shock absorber includes a cylinder body, a piston rod and an electromagnetic induction component. One end of the piston rod is connected to the vehicle body. A chamber is provided in the cylinder body, and the chamber is filled with magnetorheological fluid. The piston rod passes through the chamber and is movably arranged along the length direction of the chamber. The electromagnetic induction component is arranged in the chamber. When power is turned on, a magnetic field is applied to the magnetorheological fluid in the chamber to increase the viscosity of the magnetorheological fluid, change the fluidity of the magnetorheological fluid, and adjust the damping of the piston rod, thereby ensuring the smooth operation of the vehicle.

[0027] However, since the magnetic field is applied to the magnetorheological fluid through a single electromagnetic induction component in a single chamber, the damping adjustment range of the piston rod is limited, which is not conducive to achieving a larger damping range adjustment of the piston rod, and further is not conducive to meeting the vehicle's vibration reduction requirements under larger vibration scales.

[0028] In order to solve the above problems, the present invention proposes a magnetorheological shock absorber 10, which aims to achieve adjustment of a large damping range of the magnetorheological shock absorber 10, thereby meeting the vehicle's controllability and comfort requirements under a larger vibration scale.

[0029] Reference Figures 1 to 4 In one embodiment of the present invention, the cylinder assembly is formed with an active chamber 111, a first flow chamber 315 and a second flow chamber 335 respectively connected to the active chamber 111, and a compensation chamber 131 respectively connected to the first flow chamber 315 and the second flow chamber 335 on a side away from the active chamber 111; One end of the piston rod 5 is inserted into the active chamber 111 and reciprocates along the axial direction of the active chamber 111; one end of the piston rod 5 divides the active chamber 111 into a first working chamber 1111 and a second working chamber 1113 separated from each other, the first working chamber 1111 is connected to the first circulation chamber 315, the second working chamber 1113 is connected to the second circulation chamber 335, the first working chamber 1111 and the second working chamber 1113 are filled with magnetorheological fluid 1116, so as to be fluidically connected to the compensation chamber 131 respectively, and the compensation chamber 131 is filled with compensation gas 133; The first electromagnetic induction component 61 is disposed in the first circulation chamber 315 to apply a magnetic field to the magnetorheological fluid 1116 passing through the first circulation chamber 315; the second electromagnetic induction component 63 is disposed in the second circulation chamber 335 to apply a magnetic field to the magnetorheological fluid 1116 passing through the second circulation chamber 335; the magnetorheological fluid 1116 drives the piston rod 5 to reciprocate in cooperation with the first electromagnetic induction component 61 and the second electromagnetic induction component 63.

[0030] The piston rod 5 includes a rod body 51 and a head 53. A guide sleeve 73 may be provided around the rod body 51 to reduce the resistance during the stretching process of the rod body 51. The head 53 divides the active chamber 111 into a first working chamber 1111 and a second working chamber 1113. The second circulation chamber 335 may be connected to the second working chamber 1113 through the buffer chamber 121 to increase the circulation volume of the magnetorheological fluid 1116. In addition, since the magnetorheological fluid 1116 is incompressible, the compensation chamber 131 is filled with compensation gas. When the circulation of the magnetorheological fluid 1116 changes, the volume of the reduced space of the magnetorheological fluid 1116 in the chamber can be compensated.

[0031] The first electromagnetic induction component 61 and the second electromagnetic induction component 63 can be regarded as components of the same type, wherein, Figure 3 , the first electromagnetic induction component 61 is described in detail. The first electromagnetic induction component 61 includes a mounting component 611, an iron core 613, a coil 614, a connecting rod 615, a wire assembly 616 and an oil seal 617. The mounting component 611 includes a cylinder 6111 and two end covers 6113. The cylinder 6111 and the two end covers 6113 are arranged in the first circulation chamber 315 and enclose a magnetization chamber 6115. The magnetization chamber 6115 is penetrated by a magnetization channel 6116 that is connected to the external circulation chamber. The connecting rod 615 is partially penetrated in the magnetization chamber 6115, the iron core 613 is sleeved on the connecting rod 615 and is located in the magnetization chamber 6115, and is concavely provided with a mounting groove 6141 for arranging the coil 614. The connecting rod 615 is also provided with a groove for the wire assembly 616 to pass through, so as to supply power to the coil 614. Therefore, the first electromagnetic induction component 61 can integrate multiple coils 614 in the magnetization chamber 6115, and the magnetization channel 6116 communicates with the external circulation chamber through the magnetization channel 6116. It is beneficial to ensure the magnetization intensity of the magnetorheological fluid 1116, so as to achieve the adjustment of the larger damping range of the piston rod 5.

[0032] It is worth noting that the working principle of the scheme of the present invention can be referred to as follows: the magnetorheological fluid 1116 flows in the flow chambers corresponding to the first electromagnetic induction component 61 and the second electromagnetic induction component 63 driven by the reciprocating motion of the piston rod 5 to generate a damping force. The damping forces generated by the two flow chambers are superimposed, so the flow cross-sectional area of ​​the flow channel of the first flow chamber 315 and the second flow chamber 335 can be increased, thereby reducing the minimum damping of the entire magnetorheological damper 10. At the same time, the first electromagnetic induction component 61 and the second electromagnetic induction component 63 are independently operated, so they can use software to adjust the damping force simultaneously or independently.

[0033] In the technical solution of the present invention, the end of the piston rod 5 is inserted into the active chamber 111 and is movably arranged along the extension direction of the active chamber 111, thereby dividing the active chamber 111 into a first working chamber 1111 and a second working chamber 1113. Since the first electromagnetic induction component 61 is arranged in the first circulation chamber 315, the viscosity of the magnetorheological fluid 1116 in the first circulation chamber 315 can be adjusted by controlling the current of the first electromagnetic induction component 61, thereby changing the overall flowability of the magnetorheological fluid 1116 in each chamber, and then adjusting the damping force of the magnetorheological fluid 1116 on the piston rod 5. Similarly, since the second electromagnetic induction component 63 is arranged in the second circulation chamber 335, the viscosity of the magnetorheological fluid 1116 in the second circulation chamber 335 can be adjusted by controlling the current of the second electromagnetic induction component 63, thereby changing the overall fluidity of the magnetorheological fluid 1116 in each chamber, and then adjusting the damping force of the magnetorheological fluid 1116 on the piston rod 5 to ensure the smooth movement of the vehicle.

[0034] Therefore, the magnetorheological shock absorber 10 of the present invention is additionally provided with a first flow chamber 315 and a second flow chamber 335, and a magnetic field is applied to the magnetorheological fluid 1116 through the first electromagnetic induction component 61 and the second electromagnetic induction component 63 respectively, thereby increasing the damping adjustment range of the piston rod 5, and the first electromagnetic induction component 61 and the second electromagnetic induction component 63 can adjust the viscosity of the magnetorheological fluid 1116 individually or jointly, which is conducive to achieving a larger damping range adjustment of the magnetorheological shock absorber 10, and then conducive to meeting the vibration reduction requirements of the vehicle under a larger vibration scale.

[0035] Reference Figures 1 to 3 In one embodiment of the present invention, the cylinder assembly includes a tube assembly 1, a first bypass assembly 31 and a second bypass assembly 33, the tube assembly 1 is formed with the active chamber 111 and the compensation chamber 131, the first bypass assembly 31 is connected to one side of the tube assembly 1 and is formed with the first flow chamber 315, the second bypass assembly 33 is connected to the other side of the tube assembly 1 and is formed with the second flow chamber 335, the cavity wall of the second working chamber 1113 is provided with a liquid hole 1115 communicating with the second flow chamber 335, the cavity wall of the first working chamber 1111 is provided with a first channel 1114 communicating with the first flow chamber 315, and the first channel 1114 and the liquid hole 1115 are spaced apart in the vertical direction.

[0036] In this embodiment, the first bypass assembly 31 and the second bypass assembly 33 are respectively located on both sides of the tube assembly 1, and form a first flow chamber 315 and a second flow chamber 335. Therefore, compared with continuing to set the first flow chamber and the second flow chamber along the same axial direction of the tube assembly, this solution can reduce the axial length of the cylinder assembly by setting the first flow chamber 315 and the second flow chamber 335 on both sides of the tube assembly 1, thereby making the magnetorheological damper 10 more compact in the axial direction and facilitating the installation of the magnetorheological damper 10 in the vehicle. That is, this design reduces the axial size of the magnetorheological damper 10 by arranging the coil 614 horizontally, so compared with the existing single-coil magnetorheological damper, this design provides a smaller axial length of the magnetorheological damper 10.

[0037] Reference Figures 1 to 3 In one embodiment of the present invention, the first bypass component 31 includes a first bypass pipe 311 and a first cover plate 313, one end of the first bypass pipe 311 is connected to one side of the tube body component 1, and the first cover plate 313 is detachably connected to the other end of the first bypass pipe 311 to enclose the first bypass pipe 311 to form the first flow chamber 315.

[0038] In this embodiment, compared with setting the electromagnetic induction component in the chamber of the piston rod, which is not convenient for disassembly and maintenance of the electromagnetic induction component, this solution detachably connects the first cover plate 313 to the first bypass pipe 311. Since the first electromagnetic induction component 61 is arranged in the tube body of the first bypass pipe 311, the first electromagnetic induction component 61 can be inspected, assembled or disassembled from the outside to facilitate daily maintenance of the magnetorheological shock absorber 10.

[0039] Optionally, the outer side of the tube wall of the first bypass tube 311 is provided with threads, and the inner wall surface of the first cover plate 313 is connected to the first bypass tube 311 with corresponding threads, so as to facilitate the rapid disassembly of the first cover plate 313 .

[0040] Reference Figures 1 to 3 In one embodiment of the present invention, the first bypass pipe 311 is connected to the pipe body assembly 1 in a downwardly inclined manner along the vertical direction. And / or, the first bypass pipe 311 is welded to the pipe body assembly 1.

[0041] In this embodiment, the first bypass pipe 311 is tilted downward, which is beneficial for the magnetorheological fluid 1116 to flow into the first flow chamber 315, thereby increasing the flow performance of the magnetorheological fluid 1116 and further improving the damping adjustment of the piston rod 5.

[0042] Optionally, the first bypass pipe 311 and the pipe body assembly 1 are welded together to achieve better connection strength and sealing, which is conducive to further meeting the performance requirements of the magnetorheological vibration damper 10 .

[0043] Optionally, the second bypass pipe 331 is connected to the pipe body assembly 1 in a downwardly inclined manner along the vertical direction. And / or, the second bypass pipe 331 is welded to the pipe body assembly 1.

[0044] Reference Figures 1 to 3 In one embodiment of the present invention, the second bypass component 33 includes a second bypass pipe 331 and a second cover plate 333, one end of the second bypass pipe 331 is connected to one side of the tube body component 1, and the second cover plate 333 is detachably connected to the other end of the second bypass pipe 331 to enclose the second bypass pipe 331 to form the second flow chamber 335.

[0045] In this embodiment, based on the first cover plate 313 being detachably connected to the first bypass pipe 311, the second cover plate 333 is also detachably connected to the second bypass pipe 331, so that the first electromagnetic induction component 61 and the second electromagnetic induction component 63 can be inspected, assembled or disassembled from the outside at the same time, further facilitating the daily maintenance of the magnetorheological damper 10.

[0046] Reference Figures 1 to 3 In one embodiment of the present invention, the tube assembly 1 includes a base 14, a first tube 11, a second tube 12, a third tube 13 and a sealing cover 15. The first tube 11, the second tube 12 and the third tube 13 are concentrically nested from the inside to the outside, and the base 14 and the sealing cover 15 are respectively connected to the openings on both sides of the first tube 11, the second tube 12 and the third tube 13; The first tube body 11, the base 14 and the sealing cover 15 enclose the active chamber 111, the first tube body 11, the second tube body 12, the base 14 and the sealing cover 15 enclose a buffer chamber 121, one end of the buffer chamber 121 is connected to the liquid hole 1115, and the other end is provided with a second channel 1211 connected to the second circulation chamber 335, the second tube body 12, the third tube body 13, the base 14 and the sealing cover 15 enclose the compensation chamber 131, and the cavity wall of the compensation chamber 131 is penetrated by two third channels 1311 arranged at intervals, one of the third channels 1311 is connected to the first circulation chamber 315, and the other third channel 1311 is connected to the second circulation chamber 335.

[0047] The base 14 serves as a support for the first tube body 11 , the second tube body 12 and the third tube body 13 , and has a certain thickness along the vertical direction. It can be regarded as a main body formed with a first channel 1114 , a second channel 1211 and a third channel 1311 .

[0048] The end of the sealing cover 15 facing the second working chamber 1113 can be arranged in steps, and the lengths of the first tube body 11, the second tube body 12 and the third tube body 13 increase successively. A sealing ring 75 is arranged around the side of each step to increase the sealing performance of the sealing cover 15.

[0049] In this embodiment, the first tube body 11, the second tube body 12 and the third tube body 13 are coaxially nested, and the buffer chamber 121 between the first tube body 11 and the second tube body 12 can provide a certain volume compensation for the second circulation chamber 335, and the partially compensated volume can be used to fill the magnetorheological fluid 1116 for the magnetorheological fluid 1116 to circulate. The space between the second tube body 12 and the third tube body 13 constitutes an annular compensation chamber 131, which can be used to fill the compensation gas 133 and receive the magnetorheological fluid 1116 circulated from the first working chamber 1111 and the second working chamber 1113, so as to achieve volume compensation for the magnetorheological fluid 1116. Therefore, compared with a single-tube tube body assembly in which a buffer chamber and a compensation air chamber are arranged in sequence along the axial direction, the present solution adopts a three-tube tube body assembly 1 to achieve radial integration of the buffer chamber 121 and the compensation chamber 131, which is beneficial to reducing the axial size of the magnetorheological shock absorber 10, thereby making the magnetorheological shock absorber 10 more compact in the axial direction and facilitating the installation of the magnetorheological shock absorber 10 in the vehicle.

[0050] Optionally, the first tube body 11 , the second tube body 12 , and the third tube body 13 are welded to the base 14 , which can achieve better connection strength and sealing, and is conducive to further meeting the performance requirements of the magnetorheological vibration damper 10 .

[0051] Reference Figures 1 to 3 In one embodiment of the present invention, there are a plurality of the liquid passage holes 1115 , and the plurality of liquid passage holes 1115 are spaced apart along the circumference of the first tube body 11 .

[0052] In this embodiment, a plurality of liquid holes 1115 are provided in the circumferential direction of the first tube body 11, which can accelerate the flow of the magnetorheological fluid 1116 from the second working chamber 1113 to the buffer chamber 121. The magnetorheological fluid 1116 can achieve a higher flow rate, which is conducive to meeting the damping adjustment of the piston rod 5 in a larger range.

[0053] For example, refer to Figure 1 Four liquid holes 1115 may be provided through the circumference of the first tube body 11 .

[0054] Reference Figures 1 to 3In one embodiment of the present invention, the first channel 1114 includes a first section 11141 and a second section 11143 that are connected to each other. One end of the first section 11141 is connected to the active chamber 111, and one end of the second section 11143 is connected to the first flow chamber 315. The second section 11143 is arranged at an angle to the first section 11141.

[0055] In this embodiment, the first channel 1114 is configured to include a first section 11141 and a second section 11143 connected at an angle. Compared with a single-section configuration, the volume of the first channel 1114 for storing the magnetorheological fluid 1116 is increased, thereby facilitating a reduction in the overall volume of the magnetorheological damper 10.

[0056] Optionally, the second channel 1211 and the third channel 1311 are respectively arranged in multiple sections to increase the volume for storing the magnetorheological fluid 1116 .

[0057] Reference Figures 1 to 4 In one embodiment of the present invention, the magnetorheological damper 10 further includes a floating piston 71, and the floating piston 71 is movably arranged along the depth direction of the compensation chamber 131. The side of the floating piston 71 facing the third channel 1311 is filled with the magnetorheological fluid 1116, and the other side is filled with the compensation gas 133.

[0058] In this embodiment, when the piston rod 5 moves in the active chamber 111, the magnetorheological fluid 1116 will flow between the first working chamber 1111 and the second working chamber 1113, resulting in a change in volume. The presence of the floating piston 71 can compensate for this volume change, thereby maintaining the pressure stability in the magnetorheological damper 10. It is worth noting that the magnetorheological fluid 1116 is isolated from the compensation gas 133 by the floating piston 71, which can effectively prevent air from entering the magnetorheological fluid 1116 to form bubbles and avoid affecting the performance of the magnetorheological damper 10. Therefore, by designing the structure of the floating piston 71, the sealing of the oil to the air is improved, and the floating piston 71 element is prevented from being damaged due to high compression force.

[0059] Optionally, a sealing groove 711 may be provided on the circumference of the floating piston 71, and the sealing groove 711 is used for filling a sealing member to fully isolate the magnetorheological fluid 1116 from the compensation gas 133. The gas is introduced into the compensation chamber through a compressible gas container, and the floating piston 71 may be replaced by an air bag, which isolates the magnetorheological fluid 1116 from the compensation gas 133.

[0060] The present invention further provides a vehicle, which includes a vehicle body, wheels, and the magnetorheological damper 10 as described above, wherein the end of the piston rod 5 extending out of the active chamber 111 is connected to the vehicle body; and the wheel is connected to the side of the cylinder assembly away from the piston rod 5. The specific structure of the magnetorheological damper 10 refers to the above embodiments. Since the vehicle adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0061] The connecting frame 8 of the magnetorheological damper 10 can be used to connect the suspension system of the vehicle, so as to be connected to the wheel through the suspension system. The end of the piston rod 5 extending out of the active chamber 111 can be connected to the vehicle body through an upper support member and other components, and the wheel can be connected to the connecting frame 8 of the magnetorheological damper 10 through a lower swing arm.

[0062] Reference Figure 1 When the wheel moves downward, that is, the suspension system is stretched, the piston rod 5 will move downward, forcing the magnetorheological fluid 1116 to flow from one side of the piston rod 5 head 53 to the other side through the small hole or gap. Figure 2 When the wheel moves upward, that is, the suspension system is compressed, the piston rod 5 will move upward, and also force the magnetorheological fluid 1116 to flow from one side to the other side through the small hole or gap. Therefore, by controlling the power supply of the first electromagnetic induction component 61 and the second electromagnetic induction component 63 respectively, the viscosity of the magnetorheological fluid 1116 can be changed, and the damping adjustment of the piston rod 5 can be changed to ensure that the vehicle body runs in a more comfortable condition.

[0063] In summary, the magnetorheological shock absorber 10 and the vehicle according to the embodiment of the present invention, the tube body assembly 1 of the magnetorheological shock absorber 10 may include a first tube body 11, a second tube body 12 and a third tube body 13 which are coaxially arranged from the inside to the outside. The compensation chamber 131 between the third tube body 13 and the second tube body 12 can receive magnetorheological fluid 1116 and gas, and the head 53 of the piston rod 5 is movably arranged in the movable chamber 111 formed by the first tube body 11, and the interior of the movable chamber 111 can be divided into a first working chamber 1111 and a second working chamber 1113. The first bypass assembly 31 and the second bypass assembly 33 are respectively arranged on both sides of the outer wall of the tube body assembly 1, and the first electromagnetic induction assembly 61 is arranged in the first circulation chamber 315 of the first bypass assembly 31 and is connected to the first working chamber 1111, and the second electromagnetic induction assembly 63 is arranged in the second circulation chamber 335 of the second bypass assembly 33, The dual electromagnetic induction component solution proposed in the present invention, the first electromagnetic induction component 61 and the second electromagnetic induction component 63 can both be used to adjust the compression damping force or the tension damping force of the magnetorheological damper 10, which is essentially different from the existing single-channel electromagnetic induction magnetorheological damper.

[0064] Correspondingly, the magnetorheological shock absorber 10 of the embodiment of the present invention has the following beneficial effects: the coil 614 of the first electromagnetic induction component 61 and the second electromagnetic induction component 63 can be inspected from the outside, and then the sealing component of the standard single-tube shock absorber can be used; the axial length of the magnetorheological shock absorber 10 is small; the calibration range of the characteristic curve of the magnetorheological shock absorber 10 is improved, and a simple solution for adjusting the compression damping or the tension damping separately by software can be used; by integrating the compensation chamber 131 in an annular manner around the second tube body 12, the complexity of the tube body assembly 1 can be reduced, the external dimensions of the gas area can be reduced, and the gas pressure in the compensation chamber 131 can be relatively small; the piston rod 5 and other components are protected from damage by bubbles released from the magnetorheological fluid 1116; the complexity of the structure of the magnetorheological shock absorber 10 is reduced by component integration, so the structure is relatively simple and the production process is cost-effective.

[0065] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A magnetorheological damper, characterized in that: The magnetorheological damper comprises: A cylinder assembly, wherein the cylinder assembly is formed with an active chamber, a first flow chamber and a second flow chamber respectively connected to the active chamber, and a compensation chamber respectively connected to the first flow chamber and the second flow chamber on a side away from the active chamber; A piston rod, one end of which is inserted into the active chamber and reciprocates along the axial direction of the active chamber; one end of the piston rod divides the active chamber into a first working chamber and a second working chamber, the first working chamber is connected to the first circulation chamber, the second working chamber is connected to the second circulation chamber, the first working chamber and the second working chamber are filled with magnetorheological fluid, so as to be fluidically connected to the compensation chamber respectively, and the compensation chamber is filled with compensation gas; a first electromagnetic induction component, the first electromagnetic induction component being disposed in the first circulation chamber to apply a magnetic field to the magnetorheological fluid passing through the first circulation chamber; and The second electromagnetic induction component is arranged in the second circulation chamber to apply a magnetic field to the magnetorheological fluid passing through the second circulation chamber; the magnetorheological fluid drives the piston rod to reciprocate under the cooperation of the first electromagnetic induction component and the second electromagnetic induction component.

2. The magnetorheological damper according to claim 1, characterized in that: The cylinder assembly includes a tube assembly, a first bypass assembly and a second bypass assembly, the tube assembly forms the active chamber and the compensation chamber, the first bypass assembly is connected to one side of the tube assembly and forms the first flow chamber, the second bypass assembly is connected to the other side of the tube assembly and forms the second flow chamber, the cavity wall of the second working chamber is provided with a liquid hole communicating with the second flow chamber, the cavity wall of the first working chamber is provided with a first channel communicating with the first flow chamber, and the first channel and the liquid hole are spaced apart in the vertical direction.

3. The magnetorheological damper according to claim 2, characterized in that: The first bypass assembly includes a first bypass pipe and a first cover plate, one end of the first bypass pipe is connected to one side of the tube body assembly, and the first cover plate is detachably connected to the other end of the first bypass pipe to enclose the first bypass pipe to form the first flow chamber.

4. The magnetorheological damper according to claim 3, characterized in that: The first bypass pipe is connected to the pipe body assembly in a downwardly inclined manner along a vertical direction.

5. The magnetorheological damper according to claim 2, characterized in that: The second bypass assembly includes a second bypass pipe and a second cover plate, one end of the second bypass pipe is connected to one side of the tube body assembly, and the second cover plate is detachably connected to the other end of the second bypass pipe to enclose the second bypass pipe to form the second flow chamber.

6. The magnetorheological damper according to any one of claims 2 to 5, characterized in that: The tube assembly comprises a base, a first tube, a second tube, a third tube and a sealing cover, wherein the first tube, the second tube and the third tube are concentrically nested from the inside to the outside, and the base and the sealing cover are respectively connected to the openings on both sides of the first tube, the second tube and the third tube; The first tube body, the base and the sealing cover together form the active chamber, the first tube body, the second tube body, the base and the sealing cover together form a buffer chamber, one end of the buffer chamber is connected to the liquid hole, and the other end is provided with a second channel connected to the second flow chamber, the second tube body, the third tube body, the base and the sealing cover together form the compensation chamber, and the cavity wall of the compensation chamber is penetrated by two third channels arranged at intervals, one of the third channels is connected to the first flow chamber, and the other third channel is connected to the second flow chamber.

7. The magnetorheological damper according to claim 6, characterized in that: There are a plurality of the liquid passage holes, and the plurality of the liquid passage holes are arranged at intervals along the circumference of the first tube body.

8. The magnetorheological damper according to claim 6, characterized in that: The first channel includes a first section and a second section that are connected. One end of the first section is connected to the active chamber, and one end of the second section is connected to the first flow chamber. The second section is arranged at an angle to the first section.

9. The magnetorheological damper according to any one of claims 7 and 8, characterized in that: The magnetorheological damper further includes a floating piston, which is movably arranged along the depth direction of the compensation chamber. The side of the floating piston facing the third channel is filled with the magnetorheological fluid, and the other side of the floating piston is filled with the compensation gas.

10. A vehicle, characterized in that: The vehicle comprises: Car body; The magnetorheological shock absorber according to any one of claims 1 to 9, wherein the end of the piston rod extending out of the active chamber is connected to the vehicle body; and a wheel connected to a side of the cylinder assembly facing away from the piston rod.

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