阅读说明：本技术 磁流变减振器及车辆 (Magneto-rheological damper and vehicle ) 是由 李文飞 石印洲 李慧云 林定方 潘仲鸣 于 2020-12-14 设计创作，主要内容包括：本发明涉及汽车减震配件技术领域,提供一种磁流变减振器及车辆,磁流变减振器,包括第一缸体、第二缸体、缸体连接器、磁流变阻尼器以及活塞组件。磁流变阻尼器包括励磁线圈,缸体连接器内开设有第一走线通道,外设励磁导线通过第一走线通道连接于励磁线圈。将缸体部分拆分为两个部分,并且,通过新增的缸体连接器将第一缸体和第二缸体进行连接,以保证缸体部分密封性。以及,将磁流变阻尼器与缸体连接器进行固定,即产生磁场的磁流变阻尼器是与第一缸体或第二缸体保持固定不动,这样,其励磁线圈不随活塞组件移动,因此,在缸体连接器上开设与外部连通的第一走线通道,励磁线圈通过第一走线通道进行走线,从而从外部电源进行取电。(The invention relates to the technical field of automobile shock absorption accessories, and provides a magnetorheological shock absorber and a vehicle. The magnetorheological damper comprises an excitation coil, a first wiring channel is formed in the cylinder body connector, and an external excitation wire is connected to the excitation coil through the first wiring channel. The cylinder body part is split into two parts, and the first cylinder body and the second cylinder body are connected through a newly-added cylinder body connector so as to guarantee the sealing performance of the cylinder body part. And fixing the magnetorheological damper and the cylinder body connector, namely fixing the magnetorheological damper generating the magnetic field and the first cylinder body or the second cylinder body, so that the magnet exciting coil does not move along with the piston assembly, and therefore a first wiring channel communicated with the outside is formed in the cylinder body connector, and the magnet exciting coil is wired through the first wiring channel, so that electricity is taken from an external power supply.)

1. A magnetorheological shock absorber, characterized in that: including first cylinder body, with the coaxial and interval second cylinder body that sets up of first cylinder body, be used for connecting first cylinder body with the cylinder body connector of second cylinder body, locate in the first cylinder body and connect in the magnetorheological damper of cylinder body connector and wear to locate the piston assembly of first cylinder body, the magnetorheological damper includes excitation coil, set up the first line passageway of walking that is linked together with the outside in the cylinder body connector, peripheral hardware excitation wire passes through first line passageway connect in excitation coil.

2. The magnetorheological damper of claim 1, wherein: the magnetorheological damper is including setting up in the bracket of first line passageway department, following piston assembly's reciprocal flexible direction is laid in the interior magnetizer and the coaxial cover at the relative both ends of bracket are located the outside of bracket and connect in the outer magnetizer of cylinder body connector, excitation coil around in on the bracket, the cylinder body connector is seted up along the first damping passageway that axial direction runs through, outer magnetizer with form the second damping passageway between the bracket, first cylinder body with the second cylinder body intussuseption is filled with magnetorheological suspensions, magnetorheological suspensions passes through first damping passageway with the second damping passageway is in first cylinder body with circulate in the second cylinder body.

3. The magnetorheological damper of claim 2, wherein: a second wiring channel communicated with the first wiring channel is formed in the bracket, and an external excitation wire sequentially passes through the second wiring channel and the first wiring channel to the outside.

4. The magnetorheological damper of claim 2, wherein: the magnetorheological damper comprises a gasket which is sleeved outside the magnetorheological coil and positioned between the two inner magnetizers.

5. The magnetorheological damper of claim 4, wherein: the gasket comprises a diamagnetic coil part and a magnetic conduction coil part arranged at two opposite ends of the diamagnetic coil part, and the magnetic conduction coil part is abutted against the corresponding inner magnetizer.

6. The magnetorheological damper of claim 2, wherein: the bracket includes the supporting part and by the outside connecting portion that stretches out of supporting part one end, excitation coil around in the supporting part, interior magnetizer is located the relative both ends of supporting part, connecting portion connect in first line passageway of walking.

7. The magnetorheological damper of claim 2, wherein: the cylinder body connector includes connecting main part, by connecting main part one end is outside protruding first step portion of stretching formation, by the connecting main part other end is outside protruding second step portion of stretching formation and by first step portion is outside protruding third step portion of stretching formation, first cylinder body cover is located first step portion, the second cylinder body cover is located second step portion, outer magnetizer cover is located third step portion.

8. The magnetorheological damper of claim 1, wherein: the piston assembly comprises a piston body and a piston rod, wherein the piston body is slidably connected into the first cylinder body, one end of the piston rod is connected to the piston body, and the other end of the piston rod penetrates through the first cylinder body.

9. The magnetorheological damper of claim 1, wherein: and a floating piston is arranged in the second cylinder body.

10. A vehicle, characterized in that: comprising the magnetorheological damper according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of automobile shock-absorbing accessories, and particularly provides a magnetorheological shock absorber and a vehicle with the magnetorheological shock absorber.

Background

The shock absorber can be used for supporting the vehicle body, and the shock absorber can moderate and attenuate impact vibration from road surface unevenness, can play the effect of vibration isolation, and can effectively improve riding comfort and safety of vehicles such as vehicles. The traditional shock absorber mainly comprises a liquid damper, a gas damper and an electromagnetic damper. The three types of shock absorbers have different forms, but basically have the same working principle: the damping function is realized by providing resistance to movement and consuming movement energy. The magneto-rheological shock absorber is a novel shock absorber which takes magneto-rheological fluid as a medium on the basis of the structure of the traditional shock absorber and can realize the quick and continuous adjustment of damping force. The magnetorheological fluid is an intelligent material capable of realizing form transformation under the action of a magnetic field, and the interior of the magnetorheological fluid comprises conventional damping fluid and a large number of magnetic molecules which float randomly. When an external magnetic field changes, the arrangement mode of the magnetic molecules also changes, and the damping coefficient of the magnetorheological fluid is further influenced. Under the action of no external magnetic field, the magnetorheological fluid is not different from the common vibration damping fluid, and under the excitation of an external magnetic field, magnetic molecules in the magnetorheological fluid are arranged in a chain shape to form a viscoelastic solid, so that the damping coefficient is increased.

The traditional magnetorheological shock absorber comprises a cylinder body, a piston rod, a piston, magnetorheological fluid filled in the cylinder body, a conductive coil, a floating plug, an energy accumulator and the like, wherein a damping hole is formed in the conductive coil and is used for the magnetorheological fluid at two ends of the piston to pass through. When the shock absorber does reciprocating motion under the action of external force or load, magnetorheological fluid of the upper cavity and the lower cavity of the piston flows to the opposite cavity through the damping hole under the action of pressure. When the magnetorheological fluid flows through the damping hole, the magnetic field is changed by adjusting the current of the conductive coil, so that the arrangement mode of magnetic molecules in the magnetorheological fluid is adjusted, the damping force of the magnetorheological fluid flowing through the damping hole is controlled, and the damping force of the shock absorber is adjusted. The accumulator is composed of a spring or nitrogen with certain preset pressure and is mainly used for providing restoring force of the piston rod.

However, the excitation wires of the traditional magnetorheological damper are arranged in a manner of punching holes in the piston rod and are arranged in the piston rod, so that firstly, the processing difficulty is increased, and the bearing capacity of the damper is reduced; secondly, when the piston rod does reciprocating motion, the excitation wire can move along with the piston rod, so that the risk of wire breakage exists.

Disclosure of Invention

The invention aims to provide a magnetorheological damper, and aims to solve the problems of low bearing capacity and potential safety hazard of the conventional magnetorheological damper.

In order to achieve the purpose, the invention adopts the technical scheme that:

in a first aspect, the application provides a magnetorheological damper, including first cylinder body, with the coaxial and interval second cylinder body that sets up of first cylinder body, be used for connecting first cylinder body with the cylinder body connector of second cylinder body, locate in first cylinder body and connect in the magnetorheological damper of cylinder body connector and wear to locate the piston assembly of first cylinder body, magnetorheological damper includes excitation coil, set up the first line passageway of walking that is linked together with the outside in the cylinder body connector, the peripheral hardware excitation wire passes through first line passageway connect in excitation coil.

The invention has the beneficial effects that: according to the magneto-rheological shock absorber, the cylinder body part for the piston assembly to perform piston motion is divided into the first cylinder body and the second cylinder body, and the first cylinder body is connected with the second cylinder body through the newly added cylinder body connector, so that the sealing performance of the cylinder body part is guaranteed. And fixing the magnetorheological damper and the cylinder body connector, namely fixing the magnetorheological damper generating the magnetic field and the first cylinder body or the second cylinder body, so that the magnet exciting coil does not move along with the piston assembly, and therefore a first wiring channel communicated with the outside is formed in the cylinder body connector, and the magnet exciting coil is wired through the first wiring channel, so that electricity is taken from an external power supply. In conclusion, the piston assembly and the magneto-rheological damper are separately arranged, so that the wiring requirement of the excitation coil is met without opening holes in the piston assembly, namely, the piston assembly is higher in mechanical strength, and potential safety hazards caused by opening holes are avoided.

In one embodiment, the magnetorheological damper includes a bracket disposed at the first routing channel, an inner magnetizer disposed at two opposite ends of the bracket along a reciprocating direction of the piston assembly, and an outer magnetizer coaxially sleeved outside the bracket and connected to the cylinder connector, the excitation coil is wound on the bracket, the cylinder connector is provided with a first damping channel penetrating along an axial direction, a second damping channel is formed between the outer magnetizer and the bracket, magnetorheological fluid is filled in the first cylinder and the second cylinder, and the magnetorheological fluid circulates in the first cylinder and the second cylinder through the first damping channel and the second damping channel.

In one embodiment, a second routing channel communicated with the first routing channel is formed in the bracket, and an external excitation wire sequentially passes through the second routing channel and the first routing channel to the outside.

In one embodiment, the magnetorheological damper comprises a gasket, and the gasket is sleeved outside the magnetorheological coil and positioned between the two inner magnetizers.

In one embodiment, the washer comprises a diamagnetic coil part and a magnetic conductive coil part arranged at two opposite ends of the diamagnetic coil part, and the magnetic conductive coil part abuts against the corresponding inner magnetic conductor.

In one embodiment, the bracket includes a bearing portion and a connecting portion extending outward from one end of the bearing portion, the excitation coil is wound around the bearing portion, the inner magnetizer is disposed at two opposite ends of the bearing portion, and the connecting portion is connected to the first routing channel.

In one embodiment, the cylinder connector includes a connecting body, a first step portion formed by one end of the connecting body protruding outward, a second step portion formed by the other end of the connecting body protruding outward, and a third step portion formed by the first step portion protruding outward, the first step portion is sleeved with the first cylinder, the second step portion is sleeved with the second cylinder, and the third step portion is sleeved with the outer magnetizer.

In one embodiment, the piston assembly includes a piston body slidably connected within the first cylinder, and a piston rod having one end connected to the piston body and the other end passing through the first cylinder.

In one embodiment, a floating piston is disposed within the second cylinder.

The application also provides a vehicle comprising the magnetorheological damper.

The invention has the beneficial effects that: the vehicle provided by the invention has better damping performance and better safety performance on the basis of the magnetorheological damper.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of a magnetorheological damper in accordance with an embodiment of the present invention;

FIG. 2 is a sectional view of a magnetorheological damper and a cylinder coupler for a magnetorheological damper according to an embodiment of the present invention in a coupled state;

FIG. 3 is a cross-sectional view of a magnetorheological damper of the magnetorheological shock absorber in accordance with the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a cylinder connector of a magnetorheological damper in accordance with an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

the magnetorheological damper comprises a magnetorheological damper 100, a first cylinder 10, a second cylinder 20, a cylinder connector 30, a magnetorheological damper 40, a piston assembly 50, an excitation coil 41, a first routing channel 30a, a bracket 42, an inner magnetizer 43, an outer magnetizer 44, a first damping channel 30b, a second damping channel 30c, a first cavity 100a, a second cavity 100b, a second routing channel 40a, a gasket 45, a diamagnetic ring portion 451, a magnetic conductive ring portion 452, a bearing portion 421, a connecting portion 422, a connecting main body 31, a first step portion 32, a second step portion 33, a third step portion 34, a piston body 51, a piston rod 52, a first cylinder sleeve 11, a first end plate 12, a third cavity 100c, a first exhaust port 12a, a floating piston 60, a second cylinder sleeve 21, a second end plate 22, a fourth cavity 100d and a second exhaust port 22 a.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the structure of the traditional magneto-rheological shock absorber, the excitation coil winds on the piston and moves along with the piston, and the piston rod is provided with the opening, so that the excitation coil is conveniently and electrically connected with an external power supply. However, this tends to reduce the mechanical strength of the piston rod, reduce the load carrying capacity of the shock absorber, and increase the number of machining operations. Meanwhile, the risk of wire breakage is increased by routing through the piston rod, and the safety performance of the shock absorber is reduced. In summary, in order to solve the above problems, the present application provides a magnetorheological damper, which is described below by embodiments.

Referring to fig. 1, a magnetorheological damper 100 of the present application includes a first cylinder 10, a second cylinder 20 coaxial with and spaced apart from the first cylinder 10, a cylinder connector 30 for connecting the first cylinder 10 and the second cylinder 20, a magnetorheological damper 40 disposed in the first cylinder 10 and connected to the cylinder connector 30, and a piston assembly 50 penetrating the first cylinder 10, it can be understood that a cylinder portion of the magnetorheological damper 100 is split into the first cylinder 10 and the second cylinder 20 coaxial and spaced apart from each other, and the two cylinders are connected to form a whole through the cylinder connector 30, that is, the cylinder connector 30 remains stationary with respect to the piston assembly 50, and meanwhile, the magnetorheological damper 40 capable of generating a magnetic field is fixedly connected to the cylinder connector 30, that is, the magnetorheological damper 40 is also stationary. The magnetorheological damper 40 includes an excitation coil 41, a first routing channel 30a communicated with the outside is formed in the cylinder connector 30, and an external excitation wire is connected to the excitation coil 41 through the first routing channel 30 a.

According to the magnetorheological damper 100 provided by the invention, the cylinder part for the piston assembly 50 to perform piston motion is divided into the first cylinder 10 and the second cylinder 20, and the first cylinder 10 and the second cylinder 20 are connected through the newly added cylinder connector 30, so that the sealing performance of the cylinder part is ensured. And fixing the magnetorheological damper 40 and the cylinder connector 30, that is, the magnetorheological damper 40 generating the magnetic field is fixedly kept with the first cylinder 10 or the second cylinder 20, so that the excitation coil 41 does not move along with the piston assembly 50, therefore, a first wiring channel 30a communicated with the outside is arranged on the cylinder connector 30, and the excitation coil 41 is wired through the first wiring channel 30a, so as to take power from an external power supply. In summary, the piston assembly 50 and the magnetorheological damper 40 are separately arranged, so that the piston assembly 50 does not need to be perforated to meet the wiring requirement of the excitation coil 41, that is, the piston assembly 50 has higher mechanical strength, and potential safety hazards caused by perforation are avoided.

Referring to fig. 1, 2 and 3, in one embodiment, the magnetorheological damper 40 includes a bracket 42 disposed at the first routing channel 30a, an inner magnetizer 43 disposed at two opposite ends of the bracket 42 along the reciprocating direction of the piston assembly 50, and an outer magnetizer 44 coaxially sleeved outside the bracket 42 and connected to the cylinder connector 30. The excitation coil 41 is wound on the bracket 42, the cylinder connector 30 is provided with a first damping channel 30b penetrating along the axial direction, a second damping channel 30c is formed between the outer magnetizer 44 and the bracket 42, magnetorheological fluid is filled in the first cylinder 10 and the second cylinder 20, and the magnetorheological fluid circulates in the first cylinder 10 and the second cylinder 20 through the first damping channel 30b and the second damping channel 30 c. It can be understood that the piston assembly 50, the first cylinder 10 and the second cylinder 20 form a containing space for containing the magnetorheological fluid, the containing space is separated by the magnetorheological damper 30 and the cylinder connector 30 to form the first cavity 100a and the second cavity 100b, therefore, a first damping channel 30b needs to be formed on the cylinder connector 30, and a second damping channel 30c needs to be formed between the outer magnetizer 44 and the bracket 42 to realize the reciprocating flow of the magnetorheological fluid in the first cavity 100a and the second cavity 100 b. Meanwhile, when the magnetorheological fluid passes through the second damping channel 30c, the magnetic field is generated by the passing exciting coil 41, that is, the magnetic induction line flows through the space between the inner magnetizer 43 and the outer magnetizer 44 to form a closed loop, and the magnetic induction line passes through the magnetorheological fluid, so that the damping force of the magnetorheological fluid is changed.

Specifically, referring to fig. 2 and fig. 3, in an embodiment, a second routing channel 40a communicated with the first routing channel 30a is formed in the bracket 42, and the external excitation wires sequentially pass through the second routing channel 40a and the first routing channel 30a to the outside. It is understood that the second routing channel 40a is formed in the bracket 42, and a through hole is formed in the bracket 42, and the external excitation wire is wired through the first routing channel 30a and the second routing channel 40a, and one end of the external excitation wire is connected to the excitation coil 41 through the through hole and the other end is connected to the power socket.

Referring to fig. 2 and 3, in one embodiment, the magnetorheological damper 40 includes a washer 45, and the washer 45 is sleeved outside the magnetorheological coil and located between the two inner magnetizers 43. It is understood that the second damping passage 30c is defined by the outer magnetic conductor 44, the inner magnetic conductor 43, and the washer 45, and, by the blocking of the washer 45, the magnetorheological fluid is prevented from directly contacting the exciting coil 41,

specifically, referring to fig. 3, in one embodiment, the washer 45 includes a diamagnetic coil portion 451 and a permeable coil portion 452 disposed at opposite ends of the diamagnetic coil portion 451, and the permeable coil portion 452 abuts against the corresponding inner permeable body 43. According to research, the magnetic flux density of the magnetorheological fluid gradually tends to magnetic saturation along with the increase of the magnetic field intensity, the magnetic field intensity is continuously increased after the magnetorheological fluid is in a magnetic saturation state of the magnetic flux density, and the flow damping of the magnetorheological fluid is not changed any more. And improving the saturated magnetic flux density of the magneto-rheological damper 100 can increase the damping change range of the magneto-rheological damper, but the improvement of the saturated magnetic flux density of the magneto-rheological damper can be accompanied with the magneto-rheological damper to generate the adverse effects of the increase of the self-flowing damping and the blocking of the initial action of the magneto-rheological damper 100. Therefore, the cross-sectional areas of the inner magnetizer 43 and the outer magnetizer 44 are extended in the cross-sectional direction by the magnetic conductive ring portion 452, that is, the unit area is increased, the magnetic flux density of the magnetorheological fluid is reduced, and after the magnetic flux density of the magnetorheological fluid is reduced, the damping adjustment range of the magnetorheological damper 100 can be increased by continuously increasing the magnetic field strength of the electromagnetic coil.

Referring to fig. 1, fig. 2 and fig. 4, in an embodiment, the bracket 42 includes a supporting portion 421 and a connecting portion 422 extending outward from one end of the supporting portion 421, the exciting coil 41 is wound around the supporting portion 421, the inner magnetizers 43 are disposed at two opposite ends of the supporting portion 421, and the connecting portion 422 is connected to the first routing channel 30 a. Here, in order to improve the connection stability between the bracket 42 and the cylinder connector 30, an external thread is opened at an outer side of the connection portion 422, and an internal thread matched with the external thread is opened at an inner wall of the first routing channel 30 a. And, an annular groove for accommodating the excitation coil 41 is formed on the side wall of the bearing portion 421.

Referring to fig. 4, in an embodiment, the cylinder connector 30 includes a connecting body 31, a first step 32 formed by one end of the connecting body 31 protruding outward, a second step 33 formed by the other end of the connecting body 31 protruding outward, and a third step 34 formed by the first step 32 protruding outward, the first cylinder 10 is sleeved on the first step 32, the second cylinder 20 is sleeved on the second step 33, and the external magnetic conductor 44 is sleeved on the third step 34. Here, in order to ensure sealing performance, seal rings are provided on the first stepped portion 32 and the second stepped portion 33, respectively, to ensure that no liquid leakage occurs between the first stepped portion 32 and the first cylinder 10 and between the second stepped portion 33 and the second cylinder 20. Meanwhile, an external thread is formed on the outer wall of the third step portion 34, and an internal thread matched with the external thread is formed on the inner wall of the outer magnetizer 44, so that the connection stability of the outer magnetizer 44 on the cylinder connector 30 is ensured.

Referring to fig. 1, in one embodiment, the piston assembly 50 includes a piston body 51 slidably connected in the first cylinder 10, and a piston rod 52 having one end connected to the piston body 51 and the other end passing through the first cylinder 10. Here, the first cylinder block 10 includes a first cylinder liner 11 and a first end plate 12 that closes off an open end of the first cylinder liner 11. The first end plate 12, the first cylinder sleeve 11 and the piston body 51 are enclosed to form a third cavity 100c, no magnetorheological fluid exists in the third cavity 100c, the piston body 51 separates the first cavity 100a from the third cavity 100c, and a sealing ring is arranged on the circumferential outer side of the piston body 51 and used for preventing the magnetorheological fluid in the first cavity 100a from leaking. Meanwhile, in order to ensure the smoothness of the piston body 51 during sliding, the first end plate 12 is provided with a first exhaust port 12 a.

Referring to fig. 1, in one embodiment, a floating piston 60 is disposed in the second cylinder 20. Here, the second cylinder 20 includes a second cylinder liner 21 and a second end plate 22 blocking an open end of the second cylinder liner 21, and the second end plate 22, the second cylinder liner 21 and the floating piston 60 enclose to form a fourth cavity 100d, so that the floating piston 60 separates the second cavity 100b from the fourth cavity 100d, and a sealing ring is disposed on a circumferential outer side of the floating piston 60 for preventing leakage of the magnetorheological fluid in the second cavity 100 b. Meanwhile, in order to ensure the smoothness of the floating piston during the sliding process, a second exhaust port 22a is formed in the second end plate 22. It is understood that the floating piston 60 is used to adjust the volume of the second cavity 100b and the first cavity 100a, i.e. to adjust the overall volume of the magnetorheological fluid,

the present application further provides a vehicle comprising the magnetorheological damper 100 described above.

The vehicle provided by the invention has better damping performance and better safety performance on the basis of the magnetorheological damper 100.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.