Magneto-rheological shock absorber and vehicle

Abstract

The utility model discloses a magneto-rheological shock absorber and a vehicle, the magneto-rheological shock absorber comprises a shock absorber main body, a first cavity and a second cavity are formed in the shock absorber main body, and the second cavity is located on the outer side of the first cavity in the first direction; the magnetorheological piston and the floating piston are both arranged in the first cavity and can move in the second direction, part of the magnetorheological piston extends out of the shock absorber body, the magnetorheological piston and the floating piston are arranged in the second direction to divide the first cavity into a liquid storage chamber and an air storage chamber, and the liquid storage chamber is used for storing magnetorheological fluid. In the second direction, the liquid storage chamber is located between the magnetorheological piston and the floating piston, and the air storage chamber is located on the side, away from the magnetorheological piston, of the floating piston and communicates with the second cavity. Therefore, due to the fact that the second cavity is located on the outer side of the first cavity, compared with the prior art, the length size of the magneto-rheological damper can be reduced, and arrangement of the magneto-rheological damper on a vehicle is facilitated.

Description

Technical Field

[0001] This application relates to the field of vibration dampers, and more particularly to a magnetorheological vibration damper and a vehicle having the magnetorheological vibration damper. Background Technology

[0002] In related technologies, the liquid storage chamber and gas storage chamber of existing magnetorheological dampers are arranged along the length of the damper, resulting in a long length of the damper, which is not conducive to its placement on vehicles. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a magnetorheological damper in which the second chamber is located outside the first chamber, which, compared with the prior art, can reduce the length of the magnetorheological damper and facilitate its arrangement on a vehicle.

[0004] This application also proposes a vehicle.

[0005] In a first aspect, embodiments of this application provide a magnetorheological vibration damper, comprising:

[0006] The damper body has a first chamber and a second chamber, and along the first direction, the second chamber is located outside the first chamber.

[0007] A magnetorheological piston and a floating piston are both located in the first chamber and are movable along the second direction. A portion of the magnetorheological piston extends out of the damper body. The magnetorheological piston and the floating piston are arranged along the second direction to divide the first chamber into a liquid storage chamber and a gas storage chamber. The liquid storage chamber is used to store magnetorheological fluid. Along the second direction, the liquid storage chamber is located between the magnetorheological piston and the floating piston. The gas storage chamber is located on the side of the floating piston away from the magnetorheological piston and communicates with the second chamber. The first direction and the second direction are perpendicular.

[0008] In the above technical solution, by placing the second chamber outside the first chamber, compared with the prior art, the length of the air storage chamber along the second direction is reduced, which can reduce the length of the magnetorheological damper. This is beneficial for the placement of the magnetorheological damper on the vehicle, improves the installation efficiency, and facilitates its placement on low-profile chassis. Furthermore, the floating piston can separate the liquid storage chamber and the air storage chamber, reducing the risk of magnetorheological fluid flowing into the air storage chamber and effectively solving the problem of the magnetorheological fluid blocking the vent holes or channels in the above embodiments due to its flow between the air storage chamber and the second chamber. Additionally, the floating piston can further reduce the risk of the magnetorheological fluid wearing down the vent holes or channels in the above embodiments due to its flow between the air storage chamber and the second chamber, thus extending the service life of the magnetorheological damper.

[0009] In some embodiments, the second chamber is disposed around the first chamber in the circumferential direction.

[0010] In the above technical solution, by setting the second chamber around the first chamber in the circumference of the first chamber, it is beneficial to increase the volume of the second chamber, thereby further reducing the length of the air storage chamber in the second direction, which can further reduce the length of the magnetorheological damper in the second direction, making it more conducive to the arrangement of the magnetorheological damper on the vehicle, further improving the installation efficiency of the magnetorheological damper, and making it more conducive to the arrangement of the magnetorheological damper on the low-profile chassis.

[0011] In some embodiments, the damper body includes an inner cylinder and an outer cylinder, a first chamber is formed inside the inner cylinder, the outer cylinder is sleeved on the inner cylinder, and the outer cylinder is spaced apart from the inner cylinder to form a second chamber between the inner cylinder and the outer cylinder.

[0012] In the above technical solution, by sleeved on the inner cylinder and spaced apart from the inner cylinder, the arrangement of the first chamber and the second chamber can be realized. This can achieve the effect of arranging the first chamber and the second chamber along the first direction, and can also improve the structural compactness of the damper body, which is conducive to reducing the volume of the damper body, thereby helping to reduce the volume of the magnetorheological damper.

[0013] In some embodiments, the inner cylinder is provided with a vent hole that connects to the gas storage chamber and the second chamber.

[0014] In the above technical solution, the air vents are formed in the inner cylinder to achieve the effect of connecting the air storage chamber and the second chamber. Furthermore, it is convenient to process the air vents in the inner cylinder, which helps to simplify the main structure of the shock absorber.

[0015] In some embodiments, there are multiple vent holes, which are arranged circumferentially along the inner cylinder.

[0016] In the above technical solution, the arrangement of multiple vent holes along the circumference of the inner cylinder is beneficial to improving the flow efficiency of gas between the gas storage chamber and the second chamber, thereby improving the working performance of the magnetorheological vibration damper.

[0017] In some embodiments, the magnetorheological damper further includes: a first seal, which, along a second direction, has a first open end located on the side of the floating piston away from the magnetorheological piston, and the first seal is located on the side of the floating piston away from the magnetorheological piston, and the first seal covers the first open end and is partially assembled between the inner cylinder and the outer cylinder.

[0018] In the above technical solution, by sealing the first open end with the first sealing element, the first open end of the inner cylinder can be sealed. Furthermore, part of the structure of the first sealing element is assembled between the inner cylinder and the outer cylinder, which can seal the gap between the lower end of the outer cylinder and the inner cylinder, thereby improving the sealing performance of the gas storage chamber and the second chamber, and thus improving the sealing performance of the magnetorheological vibration damper.

[0019] In some embodiments, the magnetorheological damper further includes: a second seal, which is fitted to the end of the outer cylinder away from the first seal along a second direction, and at least a portion of the second seal is fitted between the inner cylinder and the outer cylinder.

[0020] In the above technical solution, by setting a second sealing element, at least a portion of which is assembled between the inner cylinder and the outer cylinder, the gap between the upper end of the outer cylinder and the inner cylinder can be sealed, further improving the sealing performance of the gas storage chamber and the second chamber, thereby further improving the sealing performance of the magnetorheological vibration damper.

[0021] In some embodiments, the magnetorheological damper further includes: a cover, an inner cylinder having a second open end located on the side of the magnetorheological piston away from the floating piston, the cover being fixed to the inner cylinder and covering the second open end, and the magnetorheological piston passing through the cover.

[0022] In the above technical solution, by placing the cover on the second open end, the risk of objects entering the first chamber from the second open end can be reduced, which is beneficial for keeping the first chamber clean and thus improving the working performance of the magnetorheological vibration damper. Furthermore, the rod of the magnetorheological piston passes through the cover; when the rod and the cover abut, the cover can support the rod, which helps to reduce the rod's tilt angle and facilitates the movement of the magnetorheological piston along the second direction.

[0023] In some embodiments, the inner cylinder and the outer cylinder are detachably connected.

[0024] In the above technical solution, the inner and outer cylinders are detachably connected. According to the design requirements of different vehicle models, the outer cylinder can be replaced with one that meets the length requirements of actual use. While meeting the gas capacity requirements of the second chamber and the gas storage chamber, the lateral dimensions of the magnetorheological damper are reduced, that is, the dimensions of the magnetorheological damper along the first direction are reduced, thereby reducing the lateral arrangement space of the magnetorheological damper and also facilitating the lightweight arrangement of the magnetorheological damper.

[0025] In some embodiments, the magnetorheological damper further includes a guide block, which is fixed in the first chamber and the magnetorheological piston passes through the guide block.

[0026] In the above technical solution, by passing a magnetorheological piston through the guide block, when the magnetorheological damper moves in the second direction, the guide block can guide the magnetorheological damper, thereby enabling the magnetorheological damper to move along a preset trajectory and reducing the risk of rod deflection.

[0027] In some embodiments, the magnetorheological damper further includes a third seal, which is disposed in the first chamber and sleeved on the floating piston, and the third seal abuts against the damper body.

[0028] In the above technical solution, by setting a third sealing element, the third sealing element can seal the gap between the floating piston and the inner wall of the inner cylinder, thereby achieving a sealed assembly effect between the floating piston and the inner cylinder. This can reduce the risk of magnetorheological fluid flowing into the gas storage chamber and also reduce the risk of gas flowing into the liquid storage chamber from the gas storage chamber.

[0029] In some embodiments, the magnetorheological piston includes a rod and a piston, which are fixedly connected, with the piston located in a first chamber and the rod extending out of the damper body.

[0030] In the above technical solution, by setting a rod and a piston, with the piston and the floating piston facing each other and spaced apart, a liquid storage chamber is formed between the piston and the floating piston. Furthermore, the rod extends out of the damper body, which facilitates the assembly of the magnetorheological piston with the vehicle.

[0031] In some embodiments, the magnetorheological damper further includes a fourth seal, which is disposed in the first chamber and sleeved on the piston portion, and the fourth seal abuts against the damper body.

[0032] In the above technical solution, by setting a fourth sealing element, the fourth sealing element can seal the gap between the piston part and the inner wall of the inner cylinder, thereby achieving a sealing assembly effect between the piston part and the inner cylinder, which is beneficial to improving the sealing performance of the liquid storage chamber.

[0033] Secondly, embodiments of this application also provide a vehicle including the aforementioned magnetorheological damper.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1 This is a schematic diagram of the vehicle structure provided for some embodiments of this application;

[0037] Figure 2This is a cross-sectional view of a magnetorheological vibration damper provided in one embodiment of this application;

[0038] Figure 3 A cross-sectional view of a magnetorheological damper provided in another embodiment of this application.

[0039] Figure label:

[0040] Magnetorheological vibration damper 100;

[0041] Vibration damper body 10; first chamber 11; liquid storage chamber 111; gas storage chamber 112; second chamber 12; inner cylinder 13; vent hole 131; first open end 132; second open end 133; outer cylinder 14;

[0042] Magnetorheological piston 20; rod 21; wiring channel 211; piston part 22; fourth seal 23;

[0043] Floating piston 30;

[0044] First seal 40; Second seal 50;

[0045] Cap 60;

[0046] Guide block 70; Third seal 80; Bushing 90; Fifth seal 91; Piston ring 92;

[0047] Vehicle 200. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0050] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0055] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0056] In this application, "multiple" means two or more (including two).

[0057] In this embodiment of the application, the magnetorheological damper can be widely used in vehicles, but this application is not limited to this. The magnetorheological damper can also be used in other equipment that requires the installation of magnetorheological dampers, such as electric toys, spacecraft, electric vehicles, etc.

[0058] In this embodiment, the magnetorheological damper serves to reduce vibration. When installed on a vehicle, it accelerates the attenuation of vibrations between the frame and body, thereby improving the ride comfort of the vehicle. Magnetorheological dampers are used not only in vehicle suspensions but also in other locations, such as the driver's cab and seats. They can also be used as shock absorbers on vehicle bumpers.

[0059] In recent years, the automotive industry has experienced rapid development. In the automotive field, magnetorheological dampers play an irreplaceable and important role as vibration damping devices. However, the liquid and gas reservoirs of existing magnetorheological dampers are arranged along the length of the damper, resulting in a relatively long length, which is not conducive to the installation of magnetorheological dampers on vehicles.

[0060] Based on the above considerations, in order to solve the problem that the long length of the magnetorheological damper is unfavorable for its placement on vehicles, a magnetorheological damper was designed after in-depth research. The damper includes: a damper body, which has a first chamber and a second chamber, with the second chamber located outside the first chamber along a first direction; a magnetorheological piston and a floating piston, both of which are located within the first chamber and are movable along a second direction. A portion of the magnetorheological piston extends out of the damper body. The magnetorheological piston and the floating piston are arranged along the second direction to separate the first chamber into a liquid storage chamber and a gas storage chamber. The liquid storage chamber is used to store magnetorheological fluid and is located between the magnetorheological piston and the floating piston along the second direction. The gas storage chamber is located on the side of the floating piston away from the magnetorheological piston and communicates with the second chamber.

[0061] In the magnetorheological damper of this application, the second chamber is located outside the first chamber. Compared with the prior art, this can reduce the length of the magnetorheological damper, which is beneficial for the arrangement of the magnetorheological damper on the vehicle.

[0062] For ease of explanation, the following embodiments use a magnetorheological damper installed in a vehicle as an example.

[0063] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 200 provided in some embodiments of this application. The vehicle 200 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A magnetorheological damper 100 can be installed in the suspension system of the vehicle 200.

[0064] The following is for reference. Figure 2 and Figure 3 A magnetorheological damper 100 according to an embodiment of this application is described.

[0065] According to some embodiments of this application, reference is made to Figure 2and Figure 3 This application provides a magnetorheological damper 100, which includes: a damper body 10, which has a first chamber 11 and a second chamber 12. The second chamber 12 is located outside the first chamber 11 along a first direction; a magnetorheological piston 20 and a floating piston 30, which are both disposed in the first chamber 11 and movable along a second direction. A portion of the magnetorheological piston 20 extends out of the damper body 10. The magnetorheological piston 20 and the floating piston 30 are arranged along the second direction to divide the first chamber 11 into a liquid storage chamber 111 and a gas storage chamber 112. The liquid storage chamber 111 is used to store magnetorheological fluid. Along the second direction, the liquid storage chamber 111 is located between the magnetorheological piston 20 and the floating piston 30. The gas storage chamber 112 is located on the side of the floating piston 30 away from the magnetorheological piston 20 and communicates with the second chamber 12. The first direction and the second direction are perpendicular.

[0066] The magnetorheological damper 100 includes a damper body 10, a magnetorheological piston 20, and a floating piston 30. The damper body 10 forms a first chamber 11 and a second chamber 12; in other words, the damper body 10 defines the first chamber 11 and the second chamber 12. Along a first direction, which is perpendicular to the direction of movement of the magnetorheological piston 20, the second chamber 12 is located radially outside the first chamber 11, and the first chamber 11 and the second chamber 12 can be arranged adjacent to each other. Both the magnetorheological piston 20 and the floating piston 30 are disposed within the first chamber 11. Both the magnetorheological piston 20 and the floating piston 30 are movable along a second direction, which is perpendicular to the first direction. The second direction refers to the direction of movement of the magnetorheological piston 20 and the floating piston 30. Along the second direction, a portion of the magnetorheological piston 20 extends out of the damper body 10. Figure 2 The magnetorheological piston 20 and the floating piston 30 are arranged along the second direction. The magnetorheological piston 20 and the inner wall of the first chamber 11 are sealed, and the floating piston 30 and the inner wall of the first chamber 11 are also sealed. The magnetorheological piston 20 and the floating piston 30 divide the first chamber 11 to form a liquid storage chamber 111 and a gas storage chamber 112. The liquid storage chamber 111 is used to store magnetorheological fluid. Along the second direction, the liquid storage chamber 111 is located between the magnetorheological piston 20 and the floating piston 30. The gas storage chamber 112 is located on the side of the floating piston 30 away from the magnetorheological piston 20, and the gas storage chamber 112 is connected to the second chamber 12. The damper body 10 may have a vent hole 131 that connects the gas storage chamber 112 and the second chamber 12, or the damper body 10 may have a channel that connects the gas storage chamber 112 and the second chamber 12.

[0067] As an example, along the second direction, the first chamber 11 has a first end wall and a second end wall opposite to the magnetorheological piston 20, the floating piston 30 is located between the magnetorheological piston 20 and the first end wall, the magnetorheological piston 20 is located between the floating piston 30 and the second end wall, the floating piston 30 and the first end wall are spaced apart to form a gas storage chamber 112 between the floating piston 30 and the first end wall, and the magnetorheological piston 20 and the floating piston 30 are spaced apart to form a liquid storage chamber 111 between the magnetorheological piston 20 and the floating piston 30.

[0068] The magnetorheological damper 100 contains a magnetorheological fluid in its reservoir 111. In a non-magnetic field condition, or when the magnetorheological piston 20 is not energized, the magnetorheological fluid behaves as a Newtonian fluid. A Newtonian fluid is a fluid that can flow under any small external force, and its velocity gradient is directly proportional to the applied shear stress. In a magnetic field condition, when the magnetorheological piston 20 is energized, the magnetorheological fluid instantly transforms into a Bingham fluid, significantly increasing its viscosity and shear strength. A Bingham fluid is one that only begins to deform under shear stress exceeding a certain value, and the shear stress changes linearly with the shear deformation rate. Under low stress, a Bingham fluid behaves as a rigid body, but under high stress, it flows like a viscous fluid.

[0069] The working principle of the magnetorheological damper 100 is as follows: the reservoir 111 of the magnetorheological damper 100 is filled with magnetorheological fluid. The magnetorheological piston 20 with coil generates a magnetic field around the magnetorheological piston 20 by changing the input current, thereby changing the rheological properties of the magnetorheological fluid and turning the magnetorheological fluid into Bingham fluid, thus changing the damping force of the magnetorheological damper 100. When no current is passed through the magnetorheological piston 20, the magnetic field around the magnetorheological piston 20 disappears, and the magnetorheological fluid turns into a Newtonian fluid.

[0070] like Figure 2 and Figure 3 As shown, the magnetorheological damper 100 extending along the height direction is used as an example for explanation. When the magnetorheological piston 20 moves toward the floating piston 30, that is, when the magnetorheological piston 20 moves downward, current flows through the coil on the magnetorheological piston 20, the floating piston 30 moves downward, and the gas in the gas storage chamber 112 flows into the second chamber 12. When the magnetorheological piston 20 moves away from the floating piston 30, that is, when the magnetorheological piston 20 moves upward, current does not flow through the coil on the magnetorheological piston 20, the floating piston 30 moves upward, and the gas in the second chamber 12 flows into the gas storage chamber 112.

[0071] The second chamber 12 of the magnetorheological damper 100 of this application is located on one side of the first chamber 11. Both the second chamber 12 and the air storage chamber 112 are constructed as air chambers, with some air chambers and another part of the air chambers arranged along the first direction, reducing the length of the air storage chamber 112 along the second direction. This reduces the length of the magnetorheological damper 100 along the second direction, which is beneficial for the arrangement of the magnetorheological damper 100 on the vehicle 200, improving the installation efficiency of the magnetorheological damper 100, and facilitating its arrangement on low-profile chassis. Furthermore, since the magnetorheological fluid contains a large amount of iron powder, it is prone to sedimentation. The floating piston 30 can separate the liquid storage chamber 111 and the air storage chamber 112, reducing the risk of the magnetorheological fluid flowing into the air storage chamber 112. This effectively solves the problem of the magnetorheological fluid blocking the vent hole 131 or channel in the above embodiment due to its flow between the air storage chamber 112 and the second chamber 12. In addition, the flow of magnetorheological fluid between the gas storage chamber 112 and the second chamber 12 may wear down the vent hole 131 or channel in the above embodiment. The floating piston 30 can separate the liquid storage chamber 111 and the gas storage chamber 112, reducing the risk of the magnetorheological fluid wearing down the vent hole 131 or channel in the above embodiment, and improving the service life of the magnetorheological vibration damper 100.

[0072] In the above technical solution, by positioning the second chamber 12 outside the first chamber 11, the length of the air storage chamber 112 along the second direction is reduced, which in turn reduces the length of the magnetorheological damper 100 along the second direction. This facilitates the arrangement of the magnetorheological damper 100 on the vehicle 200, improves the installation efficiency of the magnetorheological damper 100, and is beneficial for its arrangement on low-profile chassis. Furthermore, the floating piston 30 separates the liquid storage chamber 111 and the air storage chamber 112, reducing the risk of magnetorheological fluid flowing into the air storage chamber 112. This effectively solves the problem of the magnetorheological fluid blocking the vent hole 131 or channel in the above embodiment due to its flow between the air storage chamber 112 and the second chamber 12. In addition, the floating piston 30 separates the liquid storage chamber 111 and the air storage chamber 112, reducing the risk of the magnetorheological fluid wearing down the vent hole 131 or channel in the above embodiment due to its flow between the air storage chamber 112 and the second chamber 12, thus increasing the service life of the magnetorheological damper 100.

[0073] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the second chamber 12 is arranged around the first chamber 11 in the circumferential direction.

[0074] As an example, the second chamber 12 can be arc-shaped, and the second chamber 12 is arranged around the first chamber 11 circumferentially. As another example, the second chamber 12 can be annular, and further, the second chamber 12 can be circular, and the second chamber 12 is arranged around the first chamber 11 circumferentially.

[0075] In the above technical solution, by setting the second chamber 12 around the first chamber 11 in the circumferential direction, it is beneficial to increase the volume of the second chamber 12, thereby further reducing the length of the air storage chamber 112 in the second direction, which can further reduce the length of the magnetorheological damper 100 in the second direction, which is more conducive to the arrangement of the magnetorheological damper 100 on the vehicle 200, further improving the installation efficiency of the magnetorheological damper 100, and more conducive to the arrangement of the magnetorheological damper 100 on the low-profile chassis.

[0076] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the main body 10 of the shock absorber includes an inner cylinder 13 and an outer cylinder 14. A first chamber 11 is formed inside the inner cylinder 13. The outer cylinder 14 is sleeved on the inner cylinder 13. The outer cylinder 14 is spaced apart from the inner cylinder 13 to form a second chamber 12 between the inner cylinder 13 and the outer cylinder 14.

[0077] The damper body 10 may include an inner cylinder 13 and an outer cylinder 14. The inner cylinder 13 is annular; for example, it may be cylindrical, defining a first chamber 11. The outer cylinder 14 is annular; for example, it may be cylindrical. The outer cylinder 14 is sleeved outside the inner cylinder 13, with its inner wall spaced apart from the outer wall of the inner cylinder 13, thus forming a second chamber 12 between them. Furthermore, the gaps between the two ends of the outer cylinder 14 and the inner cylinder 13 are sealed, which helps ensure that the gas pressure and gas volume in the second chamber 12 and the gas storage chamber 112 meet the operational requirements and the magnetorheological fluid return pressure requirements.

[0078] In the above technical solution, by sleeved on the inner cylinder 13 with the outer cylinder 14 and spaced apart from the inner cylinder 13, the arrangement of the first chamber 11 and the second chamber 12 can be realized, the first chamber 11 and the second chamber 12 can be arranged along the first direction, and the structural compactness of the damper body 10 can be improved, which is conducive to reducing the volume of the damper body 10, thereby helping to reduce the volume of the magnetorheological damper 100.

[0079] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the inner cylinder 13 has a vent hole 131, which connects the gas storage chamber 112 and the second chamber 12.

[0080] The inner cylinder 13 has a vent hole 131 that extends through the inner cylinder 13 along its thickness direction. The first chamber 11 is located inside the inner cylinder 13, and the second chamber 12 is located outside the inner cylinder 13. The inner end of the vent hole 131 is connected to the first chamber 11, and the outer end of the vent hole 131 is connected to the second chamber 12.

[0081] In the above technical solution, the air vent 131 is formed in the inner cylinder 13 to achieve the effect of connecting the air storage chamber 112 and the second chamber 12. In addition, it is convenient to process the air vent 131 on the inner cylinder 13, which helps to simplify the structure of the damper body 10.

[0082] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, there are multiple vent holes 131, which are arranged circumferentially along the inner cylinder 13.

[0083] The ventilation holes 131 can be multiple, and the number of ventilation holes 131 can be two, three, four, five, etc. The number of ventilation holes 131 can be reasonably selected according to the actual situation. The multiple ventilation holes 131 can be arranged sequentially along the circumference of the inner cylinder 13. Furthermore, the multiple ventilation holes 131 can be arranged evenly along the circumference of the inner cylinder 13.

[0084] In the above technical solution, the arrangement of multiple vent holes 131 along the circumference of the inner cylinder 13 is beneficial to improving the flow efficiency of gas between the gas storage chamber 112 and the second chamber 12, thereby improving the working performance of the magnetorheological vibration damper 100.

[0085] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 further includes: a first seal 40, along the second direction, the inner cylinder 13 has a first open end 132, the first open end 132 is located on the side of the floating piston 30 away from the magnetorheological piston 20, the first seal 40 is located on the side of the floating piston 30 away from the magnetorheological piston 20, the first seal 40 covers the first open end 132 and is partially assembled between the inner cylinder 13 and the outer cylinder 14.

[0086] The magnetorheological vibration damper 100 may further include: a first sealing element 40, which has a sealing function. The material of the first sealing element 40 can be reasonably selected and set according to actual usage requirements. Along the second direction, the inner cylinder 13 has a first open end 132, which is located on the side of the floating piston 30 away from the magnetorheological piston 20. Figure 2 and Figure 3 As shown, the side of the floating piston 30 away from the magnetorheological piston 20 refers to... Figure 2 and Figure 3On the lower side of the inner cylinder 13, the first sealing element 40 is located below the inner cylinder 13. The first sealing element 40 covers the first open end 132 of the inner cylinder 60. The first sealing element 40 can be connected to the inner cylinder 13. The first sealing element 40 can be constructed as the first end wall of the above embodiment. Part of the structure of the first sealing element 40 is assembled between the inner cylinder 13 and the outer cylinder 14.

[0087] In the above technical solution, by sealing the first open end 132 of the inner cylinder 13 with the first sealing member 40, the first open end 132 of the inner cylinder 13 can be sealed. Furthermore, part of the structure of the first sealing member 40 is assembled between the inner cylinder 13 and the outer cylinder 14, which can seal the gap between the lower end of the outer cylinder 14 and the inner cylinder 13, which is beneficial to improving the sealing performance of the gas storage chamber 112 and the second chamber 12, thereby improving the sealing performance of the magnetorheological vibration damper 100.

[0088] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, along the second direction, a bushing 90 is fixedly provided on the side of the first seal 40 opposite to the floating piston 30. The bushing 90 and the first seal 40 can be integrally formed, or the bushing 90 and the first seal 40 can be fixedly connected by bolts. The bushing 90 is used for assembly with the vehicle 200, thereby mounting the magnetorheological damper 100 on the vehicle 200.

[0089] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 further includes: a second seal 50, which is assembled on the end of the outer cylinder 14 away from the first seal 40 along a second direction, and at least a portion of the second seal 50 is assembled between the inner cylinder 13 and the outer cylinder 14.

[0090] The magnetorheological damper 100 may further include a second sealing element 50, which has a sealing function. The material of the second sealing element 50 can be reasonably selected according to actual usage requirements. The first sealing element 40 and the second sealing element 50 can be made of the same material. Along the second direction, the second sealing element 50 is assembled on the end of the outer cylinder 14 opposite to the first sealing element 40. The end of the outer cylinder 14 opposite to the first sealing element 40 refers to... Figure 2 and Figure 3The upper end of the second sealing member 50 is partially assembled between the upper ends of the inner cylinder 13 and the outer cylinder 14, or the entire structure of the second sealing member 50 is assembled between the upper ends of the inner cylinder 13 and the outer cylinder 14. This application will describe an example where a portion of the second sealing member 50 is assembled between the upper ends of the inner cylinder 13 and the outer cylinder 14. As an example, the second sealing member 50 includes a sealing portion and a limiting portion, which are bent together. The sealing portion is assembled between the inner cylinder 13 and the outer cylinder 14, and the limiting portion is located on the side of the outer cylinder 14 opposite to the first sealing member 40, abutting against the end of the outer cylinder 14 opposite to the first sealing member 40. Further, the inner cylinder 13 and the outer cylinder 14 can be fixedly assembled using the first sealing member 40 and the second sealing member 50, or the inner cylinder 13 and the outer cylinder 14 can be snap-fitted together.

[0091] In the above technical solution, by setting a second sealing element 50, at least a portion of which is assembled between the inner cylinder 13 and the outer cylinder 14, the gap between the upper end of the outer cylinder 14 and the inner cylinder 13 can be sealed, thereby further improving the sealing performance of the gas storage chamber 112 and the second chamber 12, and thus further improving the sealing performance of the magnetorheological damper 100.

[0092] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 further includes a third seal 80, which is disposed in the first chamber 11 and sleeved on the floating piston 30, and the third seal 80 abuts against the damper body 10.

[0093] The magnetorheological damper 100 may further include a third seal 80, which may be a sealing ring. The third seal 80 is disposed in the first chamber 11 and sleeved on the outer peripheral wall of the floating piston 30. The outer peripheral wall of the floating piston 30 forms a first mounting groove, which extends circumferentially along the floating piston 30. A portion of the third seal 80 is assembled in the first mounting groove, and the end of the third seal 80 facing away from the bottom wall of the first mounting groove abuts against the inner side wall of the inner cylinder 13.

[0094] In the above technical solution, by setting a third sealing element 80, the third sealing element 80 can seal the gap between the floating piston 30 and the inner wall of the inner cylinder 13, thereby achieving a sealed assembly effect between the floating piston 30 and the inner cylinder 13. This can reduce the risk of magnetorheological fluid flowing into the gas storage chamber 112, and also reduce the risk of gas in the gas storage chamber 112 flowing into the liquid storage chamber 111.

[0095] According to some embodiments of this application, such as Figure 2 and Figure 3As shown, the magnetorheological piston 20 includes a rod portion 21 and a piston portion 22, which are fixedly connected. The piston portion 22 is located in the first chamber 11, and the rod portion 21 extends out of the damper body 10.

[0096] The magnetorheological piston 20 may include a rod portion 21 and a piston portion 22. A coil is mounted on the piston portion 22. The rod portion 21 and piston portion 22 are fixedly connected. They can be snap-fitted together or bolted together, but this application is not limited to these methods. The rod portion 21 can also be fixed to the piston portion 22 in other ways, as long as they are fixedly connected. The piston portion 22 is assembled in the first chamber 11. The rod portion 21 extends along a second direction, located on the side of the piston portion 22 opposite to the floating piston 30. One end of the rod portion 21 is fixedly connected to the piston portion 22, and the other end of the rod portion 21 extends out of the shock absorber body 10. The rod portion 21 is used for assembly with the vehicle 200.

[0097] In the above technical solution, by setting the rod portion 21 and the piston portion 22, the piston portion 22 and the floating piston 30 are opposite to each other and spaced apart, thereby forming a liquid storage chamber 111 between the piston portion 22 and the floating piston 30. Furthermore, the rod portion 21 extends out of the shock absorber body 10, which facilitates the assembly of the magnetorheological piston 20 with the vehicle 200.

[0098] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 may further include: a fourth seal 23, which is disposed in the first chamber 11 and sleeved on the piston portion 22, and the fourth seal 23 abuts against the damper body 10.

[0099] The fourth sealing element 23 can be a sealing ring. The fourth sealing element 23 is disposed in the first chamber 11 and is sleeved on the outer peripheral wall of the piston part 22. The outer peripheral wall of the piston part 22 has a second mounting groove. The second mounting groove extends along the circumference of the piston part 22. Part of the fourth sealing element 23 is assembled in the second mounting groove. The end of the fourth sealing element 23 away from the bottom wall of the second mounting groove abuts against the inner side wall of the inner cylinder 13.

[0100] In the above technical solution, by setting a fourth sealing element 23, the fourth sealing element 23 can seal the gap between the piston part 22 and the inner wall of the inner cylinder 13, thereby achieving a sealed assembly effect between the piston part 22 and the inner cylinder 13, which is beneficial to improving the sealing performance of the liquid storage chamber 111.

[0101] According to some embodiments of this application, such as Figure 2 and Figure 3As shown, the magnetorheological damper 100 further includes: a cover 60, an inner cylinder 13 having a second open end 133, the second open end 133 being located on the side of the magnetorheological piston 20 away from the floating piston 30, the cover 60 being fixed to the inner cylinder 13 and covering the second open end 133, and the magnetorheological piston 20 passing through the cover 60.

[0102] The magnetorheological damper 100 may further include: a cover 60, and an inner cylinder 13 having a second open end 133. The second open end 133 is located on the side of the magnetorheological piston 20 away from the floating piston 30. The side of the magnetorheological piston 20 away from the floating piston 30 refers to... Figure 2 and Figure 3 On the upper side, the upper end of the inner cylinder 13 has a second open end 133. The cover 60 is fixed to the inner cylinder 13. The cover 60 can be snapped onto the inner cylinder 13, or the cover 60 can be installed on the inner cylinder 13 by bolts. However, this application is not limited to this. The cover 60 can also be fixed to the inner cylinder 13 in other ways, as long as the cover 60 and the inner cylinder 13 are fixedly connected. The cover 60 can be located on the side of the inner cylinder 13 away from the first open end 132. The cover 60 covers the second open end 133, and the rod 21 of the magnetorheological piston 20 passes through the cover 60.

[0103] In the above technical solution, by covering the second open end 133 with the cap 60, the risk of objects entering the first chamber 11 from the second open end 133 can be reduced, which is beneficial for keeping the first chamber 11 clean and thus improving the working performance of the magnetorheological vibration damper 100. Furthermore, the rod 21 of the magnetorheological piston 20 passes through the cap 60. When the rod 21 and the cap 60 abut, the cap 60 can support the rod 21, which helps to reduce the deflection angle of the rod 21 and facilitates the movement of the magnetorheological piston 20 along the second direction.

[0104] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the inner cylinder 13 and the outer cylinder 14 are detachably connected.

[0105] The inner cylinder 13 and the outer cylinder 14 can be snapped together for a fixed connection, or the inner cylinder 13 and the outer cylinder 14 can also be fixed together by bolts, or the inner cylinder 13 and the outer cylinder 14 can also be fixedly assembled by the first sealing element 40 and the second sealing element 50.

[0106] In the above technical solution, the inner cylinder 13 and the outer cylinder 14 are detachably connected. According to the design requirements of different vehicle models, the outer cylinder 14 can be replaced with one that meets the length requirements according to actual use needs. While meeting the gas capacity requirements in the second chamber 12 and the gas storage chamber 112, the lateral dimensions of the magnetorheological damper 100 are reduced, that is, the dimensions of the magnetorheological damper 100 along the first direction are reduced, thereby reducing the lateral arrangement space of the magnetorheological damper 100 and also facilitating the lightweight arrangement of the magnetorheological damper 100.

[0107] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 further includes a guide block 70, which is fixed in the first chamber 11, and the magnetorheological piston 20 passes through the guide block 70.

[0108] The magnetorheological damper 100 may further include: a guide block 70, which is fixedly disposed within the first chamber 11 and may be adjacent to the cover 60. The guide block 70 may also be fixedly disposed within the inner cylinder 13 and the cover 60, and may also be fixedly disposed within both the inner cylinder 13 and the cover 60. The rod portion 21 of the magnetorheological piston 20 passes through the guide block 70. Further, the guide block 70 has a guide hole extending in a second direction, through which the rod portion 21 of the magnetorheological piston 20 passes. The guide block 70 may be configured as a second end wall.

[0109] In the above technical solution, the magnetorheological piston 20 passes through the guide block 70. When the magnetorheological damper 100 moves in the second direction, the guide block 70 can guide the magnetorheological damper 100, thereby enabling the magnetorheological damper 100 to move along a preset trajectory and reducing the risk of rod 21 deflection.

[0110] According to some embodiments of this application, such as Figure 2 and Figure 3 As shown, the magnetorheological damper 100 may further include a fifth seal 91, which may be a sealing ring. The fifth seal 91 is sleeved on the rod portion 21 of the magnetorheological piston 20 and assembled in the guide hole. The fifth seal 91 abuts against both the rod portion 21 of the magnetorheological piston 20 and the inner wall of the guide hole. The fifth seal 91 can seal the gap between the rod portion 21 of the magnetorheological piston 20 and the guide block 70, further improving the sealing performance of the first chamber 11.

[0111] According to some embodiments of this application, such as Figure 3As shown, the magnetorheological damper 100 may further include: a piston ring 92, which is disposed in the second chamber 12. The piston ring 92 abuts and seals against the outer side wall of the inner cylinder 13 and the inner side wall of the outer cylinder 14. The piston ring 92 divides the second chamber 12 into multiple sub-chambers, which are arranged along the second direction.

[0112] According to some embodiments of this application, this application also provides a vehicle 200, including the magnetorheological damper 100 of the above embodiments, which is beneficial to saving the layout space of the vehicle 200.

[0113] According to some embodiments of this application, such as Figure 2 As shown, this application provides a magnetorheological damper 100, which includes a damper body 10, a magnetorheological piston 20, and a floating piston 30. The damper body 10 has a first chamber 11 and a second chamber 12. Along a first direction, the second chamber 12 is located outside the first chamber 11. The magnetorheological piston 20 and the floating piston 30 are both disposed in the first chamber 11 and are movable along a second direction. The rod portion 21 of the magnetorheological piston 20 extends out of the damper body 10. The magnetorheological piston 20 and the floating piston 30 are arranged along the second direction to divide the first chamber 11 into a liquid storage chamber 111 and a gas storage chamber 112. Along the second direction, the liquid storage chamber 111 is located between the magnetorheological piston 20 and the floating piston 30, and the gas storage chamber 112 is located on the side of the floating piston 30 away from the magnetorheological piston 20 and communicates with the second chamber 12.

[0114] The shock absorber body 10 includes an inner cylinder 13 and an outer cylinder 14. A first chamber 11 is formed inside the inner cylinder 13. The outer cylinder 14 is fitted inside the inner cylinder 13 and spaced apart from the inner cylinder 13 to form a second chamber 12 between the inner cylinder 13 and the outer cylinder 14. A vent 131 is formed in the inner cylinder 13, connecting the air storage chamber 112 and the second chamber 12. Multiple vents 131 are arranged circumferentially around the inner cylinder 13. A first seal 40 covers the first open end 132 of the inner cylinder 60, and the first seal 40 is partially fitted between the inner cylinder 13 and the outer cylinder 14. A second seal 50 is fitted to the end of the outer cylinder 14 opposite to the first seal 40, and at least a portion of the second seal 50 is fitted between the inner cylinder 13 and the outer cylinder 14. A cap 60 is fixed to the inner cylinder 13 and covers the second open end 133. The rod 21 of the magnetorheological piston 20 passes through the cap 60. The inner cylinder 13 and the outer cylinder 14 are detachably connected. A guide block 70 is fixed in the first chamber 11, and the rod 21 of the magnetorheological piston 20 passes through the guide block 70. The guide block 70 and the cap 60 are arranged adjacent to each other. A third seal 80 is disposed in the first chamber 11 and sleeved on the floating piston 30, and the third seal 80 abuts against the damper body 10. A fourth seal 23 is disposed in the first chamber 11 and sleeved on the piston part 22, and the fourth seal 23 abuts against the damper body 10. A coil is provided in the piston part 22, and a wiring channel 211 is formed in the rod part 21. A wire harness passes through the wiring channel 211 and is connected to the coil.

[0115] Other components of the magnetorheological damper 100 according to the embodiments of this application, such as the material of the rod 21 and the material of the inner cylinder 13, are known to those skilled in the art and will not be described in detail here.

[0116] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A magnetorheological vibration damper, characterized in that, include: A vibration damper body, wherein the vibration damper body is formed with a first chamber and a second chamber, and along a first direction, the second chamber is located outside the first chamber; A magnetorheological piston and a floating piston are provided, both of which are disposed in the first chamber and movable along a second direction. A portion of the magnetorheological piston extends out of the damper body. The magnetorheological piston and the floating piston are arranged along the second direction to divide the first chamber into a liquid storage chamber and a gas storage chamber. The liquid storage chamber is used to store magnetorheological fluid. Along the second direction, the liquid storage chamber is located between the magnetorheological piston and the floating piston. The gas storage chamber is located on the side of the floating piston away from the magnetorheological piston and communicates with the second chamber. The first direction and the second direction are perpendicular.

2. The magnetorheological vibration damper according to claim 1, characterized in that, The second chamber is arranged around the first chamber along the circumference of the first chamber.

3. The magnetorheological vibration damper according to claim 1, characterized in that, The main body of the shock absorber includes an inner cylinder and an outer cylinder. The first chamber is formed inside the inner cylinder. The outer cylinder is sleeved on the inner cylinder. The outer cylinder is spaced apart from the inner cylinder to form a second chamber between the inner cylinder and the outer cylinder.

4. The magnetorheological vibration damper according to claim 3, characterized in that, The inner cylinder has a vent hole that connects the gas storage chamber and the second chamber.

5. The magnetorheological vibration damper according to claim 4, characterized in that, There are multiple vent holes, which are arranged circumferentially along the inner cylinder.

6. The magnetorheological vibration damper according to claim 3, characterized in that, Also includes: A first sealing element is provided along the second direction. The inner cylinder has a first open end located on the side of the floating piston away from the magnetorheological piston. The first sealing element is located on the side of the floating piston away from the magnetorheological piston. The first sealing element covers the first open end and is partially assembled between the inner cylinder and the outer cylinder.

7. The magnetorheological vibration damper according to claim 6, characterized in that, Also includes: A second seal is fitted to the end of the outer cylinder opposite to the first seal along the second direction, and at least a portion of the second seal is fitted between the inner cylinder and the outer cylinder.

8. The magnetorheological vibration damper according to claim 3, characterized in that, Also includes: The inner cylinder has a second open end, which is located on the side of the magnetorheological piston away from the floating piston. The cap is fixed to the inner cylinder and covers the second open end. The magnetorheological piston passes through the cap.

9. The magnetorheological vibration damper according to claim 3, characterized in that, The inner cylinder and the outer cylinder are detachably connected.

10. The magnetorheological vibration damper according to any one of claims 1-9, characterized in that, Also includes: A guide block is fixed in the first chamber, and the magnetorheological piston passes through the guide block.

11. The magnetorheological vibration damper according to any one of claims 1-9, characterized in that, Also includes: The third seal is disposed in the first chamber and sleeved on the floating piston, and the third seal abuts against the damper body.

12. The magnetorheological vibration damper according to any one of claims 1-9, characterized in that, The magnetorheological piston includes a rod and a piston, which are fixedly connected. The piston is located in the first chamber, and the rod extends out of the damper body.

13. The magnetorheological vibration damper according to claim 12, characterized in that, Also includes: A fourth seal is disposed in the first chamber and sleeved on the piston portion, and the fourth seal abuts against the damper body.

14. A vehicle, characterized in that, Including the magnetorheological vibration damper according to any one of claims 1-13.

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