Magneto-rheological vibration damping buffer for automobile body

Abstract

The utility model relates to the technical field of automobile damping and buffering, and discloses a magneto-rheological damping buffer for an automobile body, which comprises a damping cylinder, a floating piston, a piston body and a piston rod, the floating piston is arranged in the damping cylinder, and the piston body is arranged right above the floating piston. According to the magnetorheological vibration reduction buffer for the automobile body, the piston rod assembly can pass through the positions of the two electromagnetic coils, under the limiting working condition, the electromagnetic coils are powered on, the viscosity of magnetorheological fluid in the electromagnetic coils is increased, and under the combined action of the coils in the piston body, damping force generated by the piston rod can be increased; meanwhile, after the single-chip microcomputer controller controls the electromagnets to be powered on, the sealing spacer blocks are driven to move in the movable grooves, the number of the smooth damping holes can be freely selected, the magnetorheological fluid moves in the damping holes, kinetic energy can be efficiently absorbed, impact force is attenuated, and the damping effect is improved. And therefore, better riding experience can be brought to passengers under the extreme working condition.

Description

Technical Field

[0001] This utility model relates to the field of automotive vibration damping technology, specifically to a magnetorheological vibration damper for automotive bodies. Background Technology

[0002] Magnetorheological damping buffers operate based on the properties of magnetorheological fluids. In the absence of a magnetic field, the magnetorheological fluid behaves as a Newtonian fluid; when subjected to a strong magnetic field, its suspended particles are induced to polarize, interacting to form particle chains, thus transforming into a viscoplastic material with a certain shear yield stress. By changing the magnetic field strength, the viscosity of the magnetorheological fluid can be adjusted, thereby altering the damping force of the damping buffer. This continuous variability of damping force allows the magnetorheological damping buffer to adjust in real time according to road conditions and driving environment, providing fast, smooth, and continuously variable damping force.

[0003] Under extreme operating conditions, magnetorheological dampers primarily rely on the resistance provided by the buffer block to suppress vibrations. When road conditions become extremely turbulent, the rapid movement of the piston and its electromagnetic coil within a short period results in insufficient magnetic field strength generated by the electromagnetic coil. This prevents the magnetorheological fluid within the working cylinder from generating enough resistance to withstand the impact force on the vehicle. When the vehicle experiences a significant impact, the damper piston moves to the farthest end of the working cylinder and directly impacts the buffer block at the end of the cylinder. At this point, the buffer force generated by the buffer block can cause discomfort to passengers.

[0004] Therefore, it is necessary to propose a magnetorheological damping buffer for automobile bodies. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a magnetorheological damping buffer for automotive bodies, which has the advantage of maintaining good performance even under extreme working conditions, thus solving the problems mentioned in the background art.

[0006] This utility model provides the following technical solution: a magnetorheological damping buffer for automobile bodies, comprising a damping cylinder, a floating piston, a piston body, and a piston rod:

[0007] The floating piston is disposed inside the shock absorber cylinder, and the piston body is disposed directly above the floating piston. The piston body is located inside the shock absorber cylinder, and the piston rod is fixedly connected to the top of the piston body. Two electromagnetic coils are disposed on the surface of the shock absorber cylinder. The floating piston divides the interior of the shock absorber cylinder into a high-pressure gas chamber and a magnetorheological fluid chamber. The high-pressure gas chamber is filled with high-pressure gas, and the magnetorheological fluid chamber is filled with magnetorheological fluid. The piston body is located inside the magnetorheological fluid chamber.

[0008] Preferably, a sealing ring is provided at the connection between the piston rod and the shock absorber.

[0009] Preferably, a coil is disposed inside the piston body, and the piston body is located between two electromagnetic coils.

[0010] Preferably, a second sealing ring is fixedly connected to the side of the floating piston, and a third sealing ring is fixedly connected to the side of the piston body.

[0011] Preferably, the piston body has a plurality of movable grooves inside, and the positions of the plurality of movable grooves correspond one-to-one with the positions of the plurality of damping holes. A sealing block is slidably engaged inside the movable groove.

[0012] Preferably, the movable groove has an installation groove on its side, an electromagnet is fixedly installed inside the installation groove, a microcontroller is installed inside the piston body, the microcontroller is electrically connected to the electromagnet, a wire is connected to the microcontroller, a spring is fixedly connected to one end of the sealing block, and the other end of the spring abuts against the groove wall of the movable groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] A magnetorheological damping buffer for automotive bodies comprises a damping cylinder, a floating piston, a piston body, and a piston rod. Under extreme conditions, with a large impact force, the piston rod will be subjected to extreme compression or tension. During the reciprocating motion within the damping cylinder, the piston rod assembly passes the locations of two electromagnetic coils. Under extreme conditions, after the electromagnetic coils are energized, the viscosity of the magnetorheological fluid inside them increases. Under the combined action of the coils inside the piston body, the damping force generated on the piston rod also increases. Simultaneously, after the electromagnet is energized under the control of a microcontroller, it drives the sealing block to move within the movable groove. The number of unobstructed damping holes can be freely selected, allowing the magnetorheological fluid to move through the damping holes. This efficiently absorbs kinetic energy and attenuates the impact force, thus ensuring a better riding experience for passengers under extreme conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This is a cross-sectional view of the shock absorber cylinder of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the piston body of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 100. Shock absorber; 101. High-pressure air chamber; 102. Magnetorheological fluid chamber; 103. Sealing ring one;

[0021] 200. Floating piston; 201. Seal ring two;

[0022] 300. Piston body; 301. Sealing ring three; 302. Damping hole; 303. Movable groove; 304. Mounting groove; 305. Microcontroller controller; 306. Electromagnet; 307. Spring; 308. Sealing block; 309. Wire;

[0023] 400. Piston rod;

[0024] 500. Electromagnetic coil. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-3 A magnetorheological damping buffer for automobile body, comprising a damping cylinder 100, a floating piston 200, a piston body 300, and a piston rod 400:

[0027] A floating piston 200 is disposed inside the shock absorber 100, and a piston body 300 is disposed directly above the floating piston 200. The piston body 300 is located inside the shock absorber 100, and a piston rod 400 is fixedly connected to the top of the piston body 300. An electromagnetic coil 500 is disposed on the surface of the shock absorber 100, and there are two electromagnetic coils 500. The floating piston 200 divides the interior of the shock absorber 100 into a high-pressure gas chamber 101 and a magnetorheological fluid chamber 102. The high-pressure gas chamber 101 is filled with high-pressure gas, and the magnetorheological fluid chamber 102 is filled with magnetorheological fluid. The piston body 300 is located inside the magnetorheological fluid chamber 102.

[0028] Under extreme conditions, the piston rod 400 will be subjected to extreme compression or tension under the action of a large impact force. During the reciprocating motion in the shock absorber 100, the piston rod assembly will pass the positions of the two electromagnetic coils 500. Under extreme conditions, after the electromagnetic coils 500 are energized, the viscosity of the magnetorheological fluid inside them increases. Under the combined action of the coils inside the piston body 300, the damping force that it can generate on the piston rod 400 will also increase. At the same time, after the single-chip microcomputer controller 305 controls the electromagnet 306 to be energized, it drives the sealing block 308 to move inside the movable groove 303. The number of unobstructed damping holes 302 can be freely selected, so that the magnetorheological fluid moves from inside the damping holes 302. This can efficiently absorb kinetic energy and attenuate the impact force, thereby ensuring a better riding experience for passengers under extreme conditions.

[0029] For further optimization, please refer to Figure 1 , Figure 2 A sealing ring 103 is provided at the connection between the piston rod 400 and the shock absorber 100 to improve the sealing performance between the piston rod 400 and the shock absorber 100.

[0030] For further optimization, please refer to Figure 1 , Figure 2 A coil is installed inside the piston body 300, which is located between two electromagnetic coils 500. When the electromagnetic coils 500 are energized, the viscosity of the magnetorheological fluid inside them increases, and under the combined action of the coils inside the piston body 300, the damping force that they can generate on the piston rod 400 also increases.

[0031] Further preferably, referring to 2, a second sealing ring 201 is fixedly connected to the side of the floating piston 200, and a third sealing ring 301 is fixedly connected to the side of the piston body 300. This greatly improves the sealing performance between the piston and the inner wall of the shock absorber 100.

[0032] For further optimization, please refer to Figure 2 , Figure 3 The piston body 300 has several movable grooves 303 inside, and the positions of the movable grooves 303 correspond one-to-one with the positions of the multiple damping holes 302. A sealing block 308 is slidably engaged inside the movable groove 303.

[0033] For further optimization, please refer to Figure 2 , Figure 3The movable groove 303 has an installation groove 304 on its side. An electromagnet 306 is fixedly installed inside the installation groove 304. A microcontroller 305 is installed inside the piston body 300. The microcontroller 305 is electrically connected to the electromagnet 306. A wire 309 is connected to the microcontroller 305. A spring 307 is fixedly connected to one end of the sealing block 308. The other end of the spring 307 abuts against the groove wall of the movable groove 303. After the microcontroller 305 controls the electromagnet 306 to be energized, it drives the sealing block 308 to move inside the movable groove 303. The number of unobstructed damping holes 302 can be freely selected to control the flow rate of the magnetorheological fluid in the damping holes 302.

[0034] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetorheological damping buffer for automobile body, comprising a damping cylinder (100), a floating piston (200), a piston body (300), and a piston rod (400), characterized in that: The floating piston (200) is disposed inside the shock absorber (100), and the piston body (300) is disposed directly above the floating piston (200). The piston body (300) is located inside the shock absorber (100), and the piston rod (400) is fixedly connected to the top of the piston body (300). An electromagnetic coil (500) is disposed on the surface of the shock absorber (100), and there are two electromagnetic coils (500). The floating piston (200) divides the interior of the shock absorber (100) into a high-pressure gas chamber (101) and a magnetorheological fluid chamber (102). The high-pressure gas chamber (101) is filled with high-pressure gas, and the magnetorheological fluid chamber (102) is filled with magnetorheological fluid. The piston body (300) is located inside the magnetorheological fluid chamber (102).

2. The magnetorheological damping buffer for automobile body according to claim 1, characterized in that: A sealing ring (103) is provided at the connection between the piston rod (400) and the shock absorber (100).

3. The magnetorheological damping buffer for automobile body according to claim 2, characterized in that: The piston body (300) is equipped with a coil inside, and the piston body (300) is located between two electromagnetic coils (500).

4. The magnetorheological damping buffer for automobile body according to claim 1, characterized in that: A second sealing ring (201) is fixedly connected to the side of the floating piston (200), and a third sealing ring (301) is fixedly connected to the side of the piston body (300).

5. The magnetorheological damping buffer for automobile body according to claim 2, characterized in that: The piston body (300) has several movable grooves (303) inside, and the positions of the several movable grooves (303) correspond one-to-one with the positions of the several damping holes (302). A sealing block (308) is slidably engaged inside the movable groove (303).

6. The magnetorheological damping buffer for automobile body according to claim 5, characterized in that: The movable groove (303) has an installation groove (304) on its side. An electromagnet (306) is fixedly installed inside the installation groove (304). A single-chip microcomputer controller (305) is installed inside the piston body (300). The single-chip microcomputer controller (305) is electrically connected to the electromagnet (306). A wire (309) is connected to the single-chip microcomputer controller (305). A spring (307) is fixedly connected to one end of the sealing block (308). The other end of the spring (307) abuts against the groove wall of the movable groove (303).

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