Coil built-in magnetorheological damper

Abstract

The utility model relates to the technical field of dampers, in particular to a coil built-in magnetorheological damper which comprises a cylinder barrel composed of two semicircular cylinder barrels, and the two ends of the cylinder barrel are connected with end covers to form an inner containing cavity. A mounting groove is circumferentially formed in the inner wall of the accommodating cavity; the embedded damping ring is embedded in the mounting groove; the inner structure assembly is arranged in the containing cavity and rotationally connected with the end cover, a sealing cavity gap is formed between the outer surface of the inner structure assembly and the inner wall of the containing cavity, and the sealing cavity gap is filled with magnetorheological fluid. The transmission shaft penetrates through the center line of the rotary damping disc and is fixedly connected with the sealing discs at the two ends. The excitation sleeve and the coil are arranged in the containing cavity, the excitation sleeve is arranged on the surface of the transmission shaft in a sleeving mode, the coil is wound on the surface of the excitation sleeve in the circumferential direction, the temperature reduction and vibration reduction effects in the magnetorheological damper are achieved, and the influence of the temperature on the damping performance of a working area of the magnetorheological damper is weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, and particularly relates to a coil - built - in magneto - rheological damper. Background Art

[0002] A damper is a device that dissipates kinetic energy by providing resistance to motion, and is widely used in fields such as aviation, aerospace, railways, and bridges that require vibration reduction and weakening of kinetic energy. According to different operating principles, dampers are mainly divided into liquid dampers, gas dampers, and electromagnetic dampers. Among them, as a relatively special type of damper, the magneto - rheological damper is very suitable for working environments that require precise control due to its advantages such as fast response and intelligent controllability. In particular, it plays an important role in the precise vibration control of automotive seats, robot joints, and solar wings of spacecraft.

[0003] There are mainly two structures for traditional magneto - rheological dampers. One setting method is to wind the coil around a magnetically conductive rotating disk. However, in this setting method, the coil is in direct contact with the magneto - rheological fluid. Long - term immersion of the coil in the magneto - rheological fluid can cause the coil to be easily corroded and aged, affecting the excitation effect of the coil. In addition, in this setting method, the coil will have a relative shearing action with the magneto - rheological fluid, resulting in the coil being friction - worn by magnetic particles in the magneto - rheological fluid, thus shortening the service life of the coil. Due to coil wear and corrosion - aging, on the one hand, the magnetic field strength excited by the coil will be weakened, resulting in a significant reduction in the damping performance of the magneto - rheological damper. On the other hand, coil wear leads to leakage and short - circuit without the protection of the outer shell, causing the magneto - rheological effect to fail, thus triggering malfunctions in the operation of the magneto - rheological damper. This requires frequent replacement of the coil to ensure the normal operation of the magneto - rheological damper, but this increases the subsequent maintenance cost of the magneto - rheological damper. Another setting method is to wind the coil around the outer surface of the outer shell. However, in this setting method, the radius of the coil will increase, resulting in a significantly longer length of the coil wound with the same number of turns. As the coil length increases, the coil resistance will become larger. When the same current is input, this coil wound around the outer surface of the outer shell requires a larger power input and generates higher heat, leading to an increase in the temperature of the working area of the magneto - rheological fluid and a reduction in the working performance of the magneto - rheological damper.

[0004] Therefore, traditional magneto - rheological dampers have disadvantages such as easy corrosion and aging, shortened service life, increased power consumption, and increased working area temperature, which restrict the application and popularization of magneto - rheological dampers. Content of the Utility Model

[0005] The utility model aims to solve the problems in the prior art that traditional magneto - rheological dampers are prone to corrosion and aging, have a shortened service life, increased power consumption, and increased working area temperature. Therefore, a coil - built - in magneto - rheological damper is proposed.

[0006] To achieve the above object, in a first aspect, the present application provides a coil-built-in magnetorheological damper, comprising:

[0007] A cylinder barrel, both ends of the cylinder barrel are connected with end covers to form an internal cavity; an installation groove is circumferentially formed on the inner wall of the cavity;

[0008] An embedded damping ring, which is embedded in the installation groove;

[0009] An inner structural component, which is coaxially arranged in the cavity and rotatably connected with the end cover. A sealing gap is formed between the outer surface of the inner structural component and the inner wall of the cavity, and the sealing gap is filled with magnetorheological fluid.

[0010] In some possible embodiments, the inner structural component includes:

[0011] A rotary damping disc, both ends of the rotary damping disc are connected with sealing discs to form a receiving cavity,

[0012] A transmission shaft, which is arranged through the center line of the rotary damping disc and fixedly connected with the sealing discs at both ends;

[0013] An exciting sleeve and a coil, the exciting sleeve and the coil are arranged in the receiving cavity, and the exciting sleeve is coaxially sleeved on the surface of the transmission shaft, and the coil is wound circumferentially on the surface of the exciting sleeve.

[0014] In some possible embodiments, the connection between the transmission shaft and the sealing disc is sealed, and the receiving cavity is separated from the sealing gap.

[0015] In some possible embodiments, an avoidance groove is circumferentially arranged on the outer surface of the rotary damping disc, the avoidance groove is arranged opposite to the installation groove, and the embedded damping ring extends radially into the avoidance groove.

[0016] In some possible embodiments, the receiving cavity includes:

[0017] A first receiving cavity and a second receiving cavity which are relatively spaced apart from each other along the center line from both ends of the rotary damping disc respectively; and

[0018] An exciting short sleeve and a short coil are separately arranged in the first receiving cavity and the second receiving cavity respectively.

[0019] In some possible embodiments, the short coils in the first receiving cavity and the second receiving cavity are wound on the surface of the exciting short sleeve, and the winding direction of the short coil in the first receiving cavity is opposite to the winding direction of the short coil in the second receiving cavity, so that the current flow directions of the two short coils are opposite to form a superimposed magnetic field.

[0020] In some possible embodiments, the sealing disc includes:

[0021] A first sealing disc coaxially arranged at one end of the rotary damping disc;

[0022] A second sealing disc coaxially arranged at the other end of the rotary damping disc; and

[0023] Both ends of the transmission shaft respectively penetrate and extend from the central axes of the first sealing disc and the second sealing disc.

[0024] In some possible embodiments, the first sealing disc includes:

[0025] A sealing disc body, with a sunken groove formed on one surface, and a shaft hole for installing the transmission shaft is formed on the bottom surface of the sunken groove;

[0026] A sealing block embedded in the sunken groove, and a through hole corresponding to the shaft hole is formed along the central axis of the sealing block;

[0027] A sealing ring arranged on the circumferential inner wall of the through hole;

[0028] The sealing block and the sealing ring are used for sealing the connection between the transmission shaft and the first sealing disc.

[0029] In some possible embodiments, a first wire groove is formed on the circumferential wall surface of one end of the transmission shaft;

[0030] A second wire groove is formed on the surface of the sunken groove, one end of the second wire groove extends to intersect with one end of the first wire groove, and the other end intersects with a wire passing hole formed through the sunken groove.

[0031] In some possible embodiments, the installation groove is annular, and a plurality of the installation grooves are arranged at intervals along the axis direction of the cylinder barrel;

[0032] A plurality of the embedded damping rings are respectively installed in each of the installation grooves, and the embedded damping ring is composed of two paired embedded damping semi-rings.

[0033] In the technical solution provided by the present application above, compared with the prior art, it at least includes the following beneficial effects or advantages:

[0034] 1. In the damper of the present application, the excitation sleeve made of a magnetically conductive material generates a magnetic field as the coil inputs current. The magnetic field first passes through the sealing disc with magnetic conductivity, and then perpendicularly enters the rotatable damper disc with magnetic conductivity and the embedded damper ring with magnetic conductivity. Finally, the magnetic field returns to the excitation sleeve through the sealing disc, thus forming a complete magnetic circuit. During the process of the magnetic field passing through the excitation sleeve, the sealing disc, the rotatable damper disc, and the embedded damper ring to form a magnetic circuit, the magnetic lines of force will avoid due to the non-magnetic conductivity of the cylinder barrel, the non-magnetic conductivity of the transmission shaft, and the non-magnetic conductivity of the end cover. This promotes the magnetic lines of force to converge and not diverge along the magnetic circuit formed by the excitation sleeve, the sealing disc, the rotatable damper disc, and the embedded damper ring, enabling more magnetic lines of force to enter the magnetic field working area of the magnetorheological fluid between the rotatable damper disc and the embedded damper ring, and realizing the magnetic field strengthening of the magnetorheological fluid working area and the enhancement of its damping performance.

[0035] 2. The coil is assembled inside the rotatable damper disc. The sealing disc and the rotatable damper disc are tightly fixed by screws. The sealing disc completely seals the coil inside the rotatable damper disc, achieving a complete separation between the coil and the magnetorheological fluid and preventing the coil and the magnetorheological fluid from coming into contact with each other. Since the coil is relatively close to the transmission shaft and the diameter of the coil winding is close to being minimized, the length of the coil winding is close to the shortest. There is a positive correlation between the coil length and the coil resistance. The shortening of the coil length can reduce the coil resistance, thereby reducing the heat generation of the coil and realizing the temperature reduction inside the magnetorheological damper, weakening the influence of temperature on the damping performance of the magnetorheological damper working area.

[0036] 3. Under the action of the magnetic field, the magnetic particles in the magnetorheological fluid between the rotatable damper disc and the embedded damper ring are arranged in a chain-like structure along the magnetic field direction. When the rotatable damper disc and the embedded damper ring rotate relative to each other, the magnetic chain-like structure in the magnetorheological fluid will be sheared and deformed by the relative rotation of the rotatable damper disc and the embedded damper ring. In order to maintain its original shape, the magnetic chain-like structure will generate an anti-shearing force on the rotatable damper disc and the embedded damper ring, hindering the relative rotation of the rotatable damper disc and the embedded damper ring, thereby realizing the energy dissipation and vibration reduction effect of the magnetorheological damper.

[0037] 4. Multiple rotatable damper discs and embedded damper rings can be provided. By increasing the number of rotatable damper discs and embedded damper rings, the number of magnetic field working areas of the magnetorheological fluid and the shear action area can be increased, thereby multiplying the damping performance of the magnetorheological damper.

[0038] 5. The exciting sleeve consists of two symmetrically arranged short exciting sleeves, and the coil consists of two symmetrically arranged short coils. The winding directions of the two short coils are opposite, so that the current directions of the two short coils are opposite, and the magnetic field intensities of the two short coils are superimposed, enhancing the magnetic field intensity of the magnetorheological fluid between the rotary damping disc and the embedded damping ring, thereby increasing the shearing effect and damping effect of the magnetorheological fluid.

[0039] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Brief Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 is a schematic structural view of a magnetorheological damper shown according to an embodiment of the present application;

[0042] Figure 2 is a schematic structural view of a semi-cylindrical cylinder shown according to an embodiment of the present application;

[0043] Figure 3 is an exploded view of a magnetorheological damper shown according to an embodiment of the present application;

[0044] Figure 4 Schematic structural view of a part of the structure of a magnetorheological damper shown according to an embodiment of the present application;

[0045] Figure 5 Schematic structural view of an inner structural component shown according to an embodiment of the present application;

[0046] Figure 6 Schematic structural view of a rotary damping disc shown according to an embodiment of the present application;

[0047] Figure 7 Schematic structural view of a first sealing disc shown according to an embodiment of the present application;

[0048] Figure 8 Schematic structural view of a sealing disc body shown according to an embodiment of the present application;

[0049] Figure 9 Longitudinal sectional view of a magnetorheological damper shown according to an embodiment of the present application;

[0050] Figure 10 Longitudinal sectional view of another magnetorheological damper shown according to an embodiment of the present application.

[0051] Reference numerals

[0052] 10. Magnetorheological damper;

[0053] 100. Cylinder barrel; 110. Installation groove; 120. Semi-cylindrical barrel;

[0054] 200. Inner structural component; 210. Transmission shaft; 211. First wire groove; 220. Excitation sleeve; 221. Short excitation sleeve; 230. Coil; 231. Short coil;

[0055] 240. Rotating damping disc; 241. Accommodation cavity; 2411. First accommodation cavity; 2412. Second accommodation cavity; 242. Avoidance groove;

[0056] 250. First sealing disc; 251. Sealing disc body; 2511. Sinking groove; 2512. Shaft hole; 2513. Second wire groove; 252. Sealing block; 253. Sealing ring; 260. Second sealing disc;

[0057] 300. Embedded damping ring;

[0058] 400. End cover; 410. Front end cover; 420. Rear end cover;

[0059] 500. Sealing cavity gap. Detailed implementation manners

[0060] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0061] It should be noted that unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0062] The terms "first", "second", "third", etc. are only used for differential description and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. For example, the first end plate and the second end plate are only for differentiating different end plates and do not limit their sequence. The first end plate can also be named the second end plate, and the second end plate can also be named the first end plate without departing from the scope of the described embodiments. And the terms "first", "second", "third", etc. do not limit that the indicated features must be different.

[0063] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, terms such as "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. The meaning of "a plurality" is at least two, that is, two or more.

[0064] It should be noted that in the present application, words such as "in one embodiment", "exemplarily", and "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design described as "in one embodiment", "exemplarily", or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Specifically, the use of words such as "in one embodiment", "exemplarily", and "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in combination with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0065] Please refer to Figures 1 to 4 and Figure 9 , Figure 1 which shows a schematic structural diagram of the magnetorheological damper of this embodiment; Figure 2 which shows a schematic structural diagram of the semi-cylindrical cylinder of this embodiment; Figure 3 which shows an exploded view of the magnetorheological damper of this embodiment; Figure 4 which shows a schematic structural diagram of a partial structure of the magnetorheological damper of this embodiment; Figure 9 which shows a longitudinal sectional view of the magnetorheological damper of this embodiment;

[0066] As Figures 1 to 4 shown, the magnetorheological damper 10 includes a cylindrical ring-shaped cylinder 100. The complete cylinder 100 is composed of two semi-cylindrical cylinders. Both ends of the cylinder 100 are connected to end caps 400 to form an internal cavity; an installation groove 110 is circumferentially formed on the inner wall of the cavity. The installation groove is circular ring-shaped, and the embedded damping ring 300 is embedded in the installation groove 110. The inner structural component 200 is coaxially arranged in the cavity and rotatably connected to the end cap 400. Thus, the inner structural component 200 can rotate in the cavity of the cylinder 100. A sealed gap 500 is formed between the outer surface of the inner structural component 200 and the inner wall of the cavity, and the sealed gap 500 is filled with magnetorheological fluid.

[0067] In some examples, such as Figure 2 As shown, the cylinder barrel 100 can be designed as a structure spliced by two semi-circular cylinder barrels 120. At this time, the embedded damping ring 300 can be set in half into two semi-embedded damping rings 300 (not shown in the figure). During the installation process, first, one by one, install the half-embedded damping rings 300 into the installation grooves 110 on the inner wall of the semi-circular cylinder barrel 120, and then install the half-embedded damping rings 300 one by one into the installation grooves 110 on the inner wall of the other semi-circular cylinder barrel 120. An outer boss and an inner boss are respectively arranged at the connection of the two semi-circular cylinder barrels 120. During the installation process, after the semi-circular cylinder barrel 120 with the outer boss and the semi-circular cylinder barrel 120 with the inner boss are spliced into a whole, they are fixedly sealed and connected by bolts, and the paired semi-circular ring-shaped embedded damping rings will be spliced into a complete embedded damping ring 300.

[0068] It should be noted that in this embodiment, the structure of the cylinder barrel 100 and the embedded damping ring 300 and the corresponding installation method can be selected according to actual needs and are not limited here. The cylinder barrel 100 is made of non-magnetic material, and the embedded damping ring 300 is made of magnetic material. The specific materials can be selected according to actual needs and are not limited here.

[0069] Optionally, a plurality of installation grooves 110 can be equidistantly spaced on the inner wall of the cavity of the cylinder barrel 100, and the plurality of installation grooves 110 are distributed along the axial direction of the cylinder barrel 100. For example, the number of installation grooves 110 can be 2, 3, 4, etc., which can be specifically selected according to actual needs and are not limited here. At the same time, a plurality of embedded damping rings 300 are respectively installed in each installation groove 110.

[0070] In this way, through the structural design method of the cooperation between the embedded damping ring 300 and the cylinder barrel 100, by increasing the number of embedded damping rings 300, the number of magnetic field working areas and the shear action area of the magnetorheological fluid can be increased, thereby increasing the damping performance of the magnetorheological damper by several times.

[0071] Optionally, the end caps 400 include a front end cap 410 and a rear end cap 420 respectively installed at both ends of the cylinder barrel 100. The inner structure components 200 are installed in the cavity between the front end cap 410 and the rear end cap 420. The front end cap 410 and the rear end cap 420 are arranged to limit and seal the inner structure components 200. The shafts at both ends of the inner structure components 200 respectively pass through the front end cap 410 and the rear end cap 420 and extend to the outside, so as to facilitate the connection and installation of external mechanical devices. At the same time, bearings are arranged at the connections between the front end cap 410 and the rear end cap 420 and the shafts to reduce the friction at the connections between the shafts and the front end cap 410 and the rear end cap 420.

[0072] Such as Figure 9As shown, the front end cover 410 and the rear end cover 420 are arranged such that the cavity in the cylinder barrel 100 is isolated from the outside. Specifically, a sealed cavity 500 is formed between the outer surface of the inner structural component 200 and the inner wall of the cavity, and the magnetorheological fluid is filled in the sealed cavity 500. The front end cover 410 and the rear end cover 420 ensure that the magnetorheological fluid is in a sealed cavity.

[0073] It should be noted that for the filling of the magnetorheological fluid, it can be added after the installation of the cylinder barrel 100, the rear end cover 420 and the inner structural component 200, and then the front end cover 410 is installed to form a seal in the cavity. The connection between the front end cover 410, the rear end cover 420 and the cylinder barrel 100 can be fixed by bolts, and the specific fixing method is not limited here.

[0074] Please refer to Figures 5 to 9 , Figure 5 which shows the structural schematic diagram of the inner structural component of this embodiment. Figure 6 which shows the structural schematic diagram of the rotary damping disc of this embodiment. Figure 7 which shows the structural schematic diagram of the first sealing disc of this embodiment. Figure 8 which shows the structural schematic diagram of the sealing disc body of this embodiment. Figure 9 which shows the longitudinal sectional view of the magnetorheological damper of this embodiment;

[0075] As Figure 5 and Figure 6 shown, the inner structural component 200 includes a transmission shaft 210, an excitation sleeve 220, a coil 230 and a rotary damping disc 240. The two ends of the rotary damping disc 240 are connected to the sealing discs to form a receiving cavity 241. The transmission shaft 210 is arranged along the center line of the rotary damping disc 240 and is fixedly connected to the sealing discs at both ends. The excitation sleeve 220 and the coil 230 are arranged in the receiving cavity 241, and the excitation sleeve 220 is coaxially sleeved on the surface of the transmission shaft 210, and the coil 230 is wound circumferentially on the surface of the excitation sleeve 220.

[0076] Optionally, a first sealing disc 250 and a second sealing disc 260 are respectively fixedly connected to the two ends of the rotary damping disc 240. The first sealing disc 250 and the second sealing disc 260 are arranged such that the receiving cavity 241 opened along the central axis in the rotary damping disc 240 is in a sealed state when the transmission shaft 210, the excitation sleeve 220 and the coil 230 are installed, that is, the connection between the transmission shaft 210 and the first sealing disc 250 and the second sealing disc 260 is sealed, and the receiving cavity 241 is isolated from the sealed cavity 500.

[0077] It should be noted that the drive shaft 210, the excitation sleeve 220, the coil 230, and the rotary damping disc 240 are arranged on the same central axis after installation. The rotary damping disc 240 is arranged to completely separate the excitation sleeve 220 and the coil 230 from the magnetorheological fluid, that is, the magnetorheological fluid is non-contact with the excitation sleeve 220 and the coil 230.

[0078] In this way, the coil 230 is assembled inside the rotary damping disc 240. The sealing discs at both ends and the rotary damping disc 240 can be tightly fixed by screws. The sealing discs completely seal the coil 230 inside the rotary damping disc 240, realizing complete separation between the coil 230 and the magnetorheological fluid and preventing the coil 230 from contacting the magnetorheological fluid. Since the coil 230 is relatively close to the drive shaft 210 and the winding diameter of the coil 230 is close to being minimized, the winding length of the coil 230 is close to being the shortest. There is a positive correlation between the length of the coil 230 and the resistance of the coil 230. The shortening of the length of the coil 230 can reduce the resistance of the coil 230, thereby reducing the heat generation of the coil 230, realizing the reduction of the temperature inside the magnetorheological damper, and weakening the influence of temperature on the damping performance of the working area of the magnetorheological damper.

[0079] As Figure 6 shown, an avoidance groove 242 is circumferentially arranged on the outer surface of the rotary damping disc 240, and the embedded damping ring 300 radially extends into the avoidance groove 242. Among them, the magnetorheological fluid is non-contact and filled between the embedded damping ring 300 and the bottom surface of the avoidance groove 242. The number of the avoidance grooves 242 is equal to that of the installation grooves 110, and each avoidance groove 242 is arranged opposite to the installation groove 110.

[0080] In this way, in the magnetic field, the magnetic particles in the magnetorheological fluid between the rotary damping disc 240 and the embedded damping ring 300 are arranged in a chain-like structure along the magnetic field direction. When the rotary damping disc 240 and the embedded damping ring 300 rotate relative to each other, the magnetic chain-like structure in the magnetorheological fluid will be deformed by the relative rotation and shear of the rotary damping disc 240 and the embedded damping ring 300. In order to maintain its original shape, the magnetic chain-like structure will generate an anti-shear force on the rotary damping disc 240 and the embedded damping ring 300, hindering the relative rotation between the rotary damping disc 240 and the embedded damping ring 300, thereby realizing the energy dissipation and vibration reduction effect of the magnetorheological damper.

[0081] As Figure 7 and Figure 8As shown, the first sealing disc 250 includes a sealing disc body 251. A sunken groove 2511 is formed on one surface of the sealing disc body 251, and a shaft hole 2512 for installing the transmission shaft 210 is formed on the bottom surface of the sunken groove 2511. The sealing block 252 is embedded in the sunken groove 2511. A through hole corresponding to the shaft hole 2512 is formed in the sealing block 252 along the central axis. The sealing ring 253 is arranged on the circumferential inner wall of the through hole. The sealing block 252 and the sealing ring 253 are used for sealing the connection between the transmission shaft 210 and the first sealing disc 250.

[0082] Optionally, the shape of the sunken groove 2511 formed on the surface of the sealing disc body 251 is equivalent to the shape of the sealing block 252. The shape of the sunken groove 2511 can be cylindrical and coaxial with the sealing disc body 251. A keyway is formed along the axis at the center of the bottom surface of the sunken groove 2511. The keyway is used for placing a key to realize the fixation of the transmission shaft 210 and the first sealing disc 250. Similarly, a shaft hole is also formed in the second sealing disc 260 and a keyway is provided. The keyway is used for placing a key to realize the fixation of the transmission shaft 210 and the second sealing disc 260.

[0083] Combined Figure 8 with Figure 5 As shown, a first wire groove 211 is formed along the axis on the side wall surface of the transmission shaft 210 near one end of the first sealing disc 250. A second wire groove 2513 is formed on the surface of the sunken groove 2511. One end of the second wire groove 2513 extends to intersect with one end of the first wire groove 211, and the other end intersects with a wire passing hole formed through the sunken groove 2511. It should be noted that through the settings of the wire passing hole, the first wire groove 211 and the second wire groove 2513, while meeting the requirement of facilitating the connection between the internal coil 230 and the external power supply device, the tightness of the connection of the sealing disc is improved, preventing the magnetorheological fluid from leaking. Moreover, the setting of this wire routing is simple and more convenient for the installation and maintenance of the damper in practical applications.

[0084] In the above magnetorheological damper, the excitation sleeve 220 made of a magnetically conductive material generates a magnetic field as the coil 230 inputs current. The magnetic field first passes through the sealing disc with magnetic conductivity, and then vertically enters the rotatable damper disc 240 with magnetic conductivity and the embedded damper ring 300 with magnetic conductivity. Finally, the magnetic field returns to the excitation sleeve 220 through the first sealing disc 250 and the second sealing disc 260, thus forming a complete magnetic circuit. During the process of the magnetic field passing through the excitation sleeve 220, the first sealing disc 250, the second sealing disc 260, the rotatable damper disc 240, and the embedded damper ring 300 to form a magnetic circuit, the magnetic lines of force will avoid due to the non-magnetic conductivity of the cylinder barrel 100, the non-magnetic conductivity of the transmission shaft 210, and the non-magnetic conductivity of the end cover 400, thereby promoting the magnetic lines of force to gather and not diverge along the magnetic circuit formed by the excitation sleeve 220, the first sealing disc 250, the second sealing disc 260, the rotatable damper disc 240, and the embedded damper ring 300, enabling more magnetic lines of force to enter the magnetic field working area of the magnetorheological fluid between the rotatable damper disc 240 and the embedded damper ring 300, and realizing the magnetic field strengthening of the magnetorheological fluid working area and the enhancement of its damping performance.

[0085] Please refer to Figure 10 , Figure 10 which shows a longitudinal sectional view of another improved magnetorheological damper of this embodiment.

[0086] As Figure 10 shown, this embodiment proposes another improved magnetorheological damper. Specifically, the accommodation cavity 241 includes: a first accommodation cavity 2411 and a second accommodation cavity 2412 that are relatively spaced apart along the center line from both ends of the rotatable damper disc 240; and an excitation short sleeve 221 and a short coil 231 are separately provided in the first accommodation cavity 2411 and the second accommodation cavity 2412. It should be noted that the excitation short sleeve 221 and the short coil 231 here can be the same as the aforementioned excitation sleeve 220 and coil 230 in structure and principle, only shorter in length. At the same time, the short coils 231 in the first accommodation cavity 2411 and the second accommodation cavity 2412 are wound in opposite directions on the surface of the excitation short sleeve 221, so that the current flow directions of the two coils 230 are opposite to form a superimposed magnetic field.

[0087] In this way, the excitation sleeve 220 is two symmetrically arranged excitation short sleeves, the coil 230 is two symmetrically arranged short coils, and the two short coils are wound in opposite directions, so that the current directions of the two short coils are opposite, and the magnetic field intensities of the two short coils are superimposed, enhancing the magnetic field intensity of the magnetorheological fluid between the rotatable damper disc 5 and the embedded damper ring 4, thereby increasing the shear effect and damping effect of the magnetorheological fluid.

[0088] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the utility model.

[0089] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0090] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The mention of "embodiment" in this article means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0091] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

[0092] Those skilled in the art will readily think of other implementations of the present application after considering the specification and practicing the disclosure herein. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

Claims

1. A coil - built - in magnetorheological damper, characterized in that, Comprising: A cylinder barrel (100), with end caps (400) connected to both ends of the cylinder barrel (100) to form an internal cavity; an installation groove (110) is circumferentially formed on the inner wall of the cavity; An embedded damping ring (300), which is embedded in the installation groove (110); An inner structure component (200), which is coaxially arranged in the cavity and rotatably connected to the end cap (400). A sealing gap (500) is formed between the outer surface of the inner structure component (200) and the inner wall of the cavity, and the sealing gap (500) is filled with magnetorheological fluid.

2. The magneto-rheological damper with an internally mounted coil according to claim 1, wherein, The inner structure component (200) includes: A rotary damping disc (240), with sealing discs connected to both ends of the rotary damping disc (240) to form a receiving cavity (241); A transmission shaft (210), which is arranged through the center line of the rotary damping disc (240) and fixedly connected to the sealing discs at both ends; An excitation sleeve (220) and a coil (230), which are arranged in the receiving cavity (241). The excitation sleeve (220) is coaxially sleeved on the surface of the transmission shaft (210), and the coil (230) is wound circumferentially on the surface of the excitation sleeve (220).

3. The magneto-rheological damper with a built-in coil according to claim 2, characterized in that, The connection between the transmission shaft (210) and the sealing disc is sealed, and the receiving cavity (241) is separated from the sealing gap (500).

4. A coil - built - in magnetorheological damper according to any one of claims 1 - 3, characterized in that, An avoidance groove (242) is circumferentially formed on the outer surface of the rotary damping disc (240). The avoidance groove (242) is arranged opposite to the installation groove (110), and the embedded damping ring (300) extends radially into the avoidance groove (242).

5. The magneto-rheological damper with an in-coil according to claim 2, characterized in that, The receiving cavity (241) includes: A first receiving cavity (2411) and a second receiving cavity (2412) which are relatively spaced apart from both ends of the rotary damping disc (240) along the center line; and An excitation short sleeve (221) and a short coil (231) are separately arranged in the first receiving cavity (2411) and the second receiving cavity (2412).

6. The magneto-rheological damper with a built-in coil according to claim 5, characterized in that, The short coils (231) in the first receiving cavity (2411) and the second receiving cavity (2412) are wound in opposite directions on the surface of the excitation short sleeve (221), so that the current flowing directions of the two short coils (231) are opposite to form a superimposed magnetic field.

7. The magneto-rheological damper with a built-in coil according to claim 2, characterized in that, The sealing disc includes: A first sealing disc (250), which is coaxially arranged at one end of the rotary damping disc (240); A second sealing disc (260), which is coaxially arranged at the other end of the rotary damping disc (240); and Both ends of the transmission shaft (210) respectively penetrate and extend from the central axes of the first sealing disc (250) and the second sealing disc (260).

8. The magneto-rheological damper with a built-in coil according to claim 7, characterized in that, The first sealing disc (250) includes: A sealing disc body (251), with a sunken groove (2511) formed on one surface, and a shaft hole (2512) for installing the transmission shaft (210) is formed on the bottom surface of the sunken groove (2511); The sealing block (252) is embedded in the sinking groove (2511), and a through hole corresponding to the shaft hole (2512) is provided along the central axis of the sealing block (252); The sealing ring (253) is arranged on the circumferential inner wall of the through hole; The sealing block (252) and the sealing ring (253) are used for sealing the connection between the transmission shaft (210) and the first sealing disc (250).

9. The magnetorheological damper with a built-in coil according to claim 8, characterized in that, A first wire groove (211) is provided on the circumferential wall surface of one end of the transmission shaft (210); A second wire groove (2513) is provided on the surface of the sinking groove (2511). One end of the second wire groove (2513) extends to intersect with one end of the first wire groove (211), and the other end intersects with a wire passing hole penetrating through the sinking groove (2511).

10. A coil-embedded magnetorheological damper according to claim 8, characterized in that, The installation groove (110) is annular, and a plurality of the installation grooves (110) are arranged at intervals along the axis direction of the cylinder barrel (100); A plurality of the embedded damping rings (300) are respectively installed in each of the installation grooves (110), and the embedded damping ring (300) is composed of two paired embedded damping semi-rings.

Images