Rotary magnetorheological damper

Abstract

The utility model discloses a rotary magneto-rheological shock absorber which comprises a shock absorber outer cylinder, a magneto-rheological rotating assembly is arranged at the lower end of the shock absorber outer cylinder, a lead screw seat is arranged at the upper end of the shock absorber outer cylinder, a rotating cylinder is further arranged in the shock absorber outer cylinder, and the rotating cylinder is correspondingly fixed in the shock absorber outer cylinder in a rotating mode through a bearing assembly on the outer side. The rotating cylinder and the lead screw base above the rotating cylinder are connected and installed into a whole, and when the lead screw base rotates, the rotating cylinder is correspondingly driven to rotate integrally. According to the device, the purpose of vibration reduction is achieved mainly by shearing the excitation coil and stirring the magnetorheological fluid to generate damping force when the rotor rotates, rotation of the rotor is driven by the rotating main shaft, rotation of the rotating main shaft is correspondingly driven by the rotating cylinder, and the rotating cylinder is correspondingly driven by the lead screw seat to rotate. The screw rod seat is correspondingly matched with the ball screw rod to convert linear motion into rotary motion, finally, the rotary magnetorheological damper is formed, the overall structure is reasonable, and the damping effect and quality are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers in the automobile field, in particular to a rotary magnetorheological shock absorber. Background Art

[0002] In the prior art, magnetorheological shock absorbers utilize electromagnetic reactions to respond to road conditions and driving environments in real time based on input information from sensors that monitor vehicle body and wheel motion.

[0003] Magnetorheological fluid is a magnetic soft particle suspension. When the liquid is injected into the electromagnetic coil in the shock absorber piston, the magnetic field of the coil will change its rheological properties or generate fluid resistance, thereby generating a damping force with rapid response and strong controllability in the absence of an electromechanical control valve and a simple mechanical device.

[0004] For example: The technical solution with the publication (announcement) number: CN116658559A discloses "an anti-sedimentation magnetorheological damper". In this technical solution, an inert gas is filled between the floating piston and the right end cover, and a vibration reduction effect is formed by the dual cooperation of the inert gas and the magnetorheological fluid.

[0005] For example: The technical solution with the publication (announcement) number: CN111288111A discloses "a magnetorheological shock absorber". In this technical solution, an external coil is provided on the outer sleeve of a working cylinder, a rotatable fan-shaped piston is provided in the working cylinder, the piston rod is rotatably inserted into the working cylinder, the rotatable fan-shaped piston is fixedly connected to the piston rod, and the vibration reduction effect is achieved through the characteristics of the fan-shaped piston.

[0006] However, the vibration reduction effect in the above technical solution is not ideal and significant enough, especially the inability to utilize mechanical characteristics and rotation characteristics to achieve deceleration does not meet the requirements of existing technologies.

[0007] Therefore, in order to solve the above problems, it is necessary to develop a rotary magnetorheological vibration damper with a reasonable structure that can effectively improve the vibration reduction effect. Utility Model Content

[0008] The purpose of the utility model is to provide a rotary magnetorheological damper to address the deficiencies of the prior art; the technical solution is as follows:

[0009] A rotary magnetorheological damper comprises a damper outer cylinder, a magnetorheological rotating assembly is arranged at the lower end of the damper outer cylinder, a screw seat is arranged at the upper end of the damper outer cylinder, and a rotating cylinder is also arranged inside the damper outer cylinder, the rotating cylinder is correspondingly rotatably fixed in the damper outer cylinder through an outer bearing assembly, and the rotating cylinder is connected and installed integrally with the screw seat above, and when the screw seat rotates, the rotating cylinder is correspondingly driven to rotate integrally;

[0010] A ball screw is correspondingly installed in the screw seat, which is inserted into the screw seat from the upper end of the shock absorber outer cylinder and extends downward into the rotating cylinder; a rotating shaft is also connected to the lower end of the rotating cylinder, which extends into the magnetorheological rotating component.

[0011] Furthermore, the magnetorheological rotating assembly includes a magnetorheological chamber, which includes a U-shaped chamber cylinder and a chamber sealing plate at the upper end of the chamber cylinder; a magnetorheological fluid is arranged in the magnetorheological chamber, and a fixed excitation coil is also arranged in the magnetorheological chamber;

[0012] The rotating shaft at the lower end of the rotating cylinder passes downward through the magnetorheological chamber and is fixed to the lower end of the outer cylinder of the shock absorber through a bearing. A rotor is also arranged on the rotating shaft. The rotor is located in the magnetorheological chamber and is configured as a U-shaped cylindrical structure. The rotor is correspondingly located between the excitation coil and the chamber cylinder. The rotor surrounds the excitation coil as a whole.

[0013] Furthermore, the lower end of the screw seat is provided with an extension cylinder extending downward, and the upper end of the rotating cylinder is correspondingly fixed to the outer side of the extension cylinder and installed integrally with the screw seat.

[0014] Furthermore, a rotating seat is provided at the upper end of the screw seat, which is fixed to the inner upper end of the shock absorber outer cylinder and is installed integrally with the screw seat. The ball screw passes through the screw seat and the rotating seat and extends downward into the rotating cylinder.

[0015] Furthermore, an elastic buffer block and a fixed lifting ring are also provided at the upper end of the ball screw; external equipment can be installed accordingly through the provided fixed lifting ring.

[0016] Furthermore, a detachable cylinder cover is provided at the lower end of the shock absorber outer cylinder; the detachable cylinder cover is provided to facilitate maintenance and disassembly.

[0017] Beneficial effects: The utility model has the following beneficial effects:

[0018] 1) This device mainly utilizes the damping force generated by shearing the excitation coil and stirring the magnetorheological fluid when the rotor rotates to achieve the purpose of vibration reduction. The rotation of the rotor is driven by the rotating main shaft, and the rotation of the rotating main shaft is correspondingly driven by the rotating cylinder, and the rotating cylinder is correspondingly driven to rotate by the screw seat. The screw seat is correspondingly cooperated with the ball screw to convert the linear motion into rotational motion, and finally forms a rotary magnetorheological vibration damper. The overall structure is reasonable, and the vibration reduction effect and quality are effectively improved;

[0019] 2) In this device, the screw seat and the ball screw cooperate to realize rotation. At the same time, the screw seat and the rotating cylinder are installed in one piece, and the rotating cylinder is fixed in the outer cylinder of the shock absorber through the corresponding bearing parts. At the same time, a rotating seat is provided to cooperate with the screw seat, and the overall structure is reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the structural diagram of the utility model;

[0021] Figure 2 This is the internal structure diagram of the utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0023] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, a rotary magnetorheological vibration damper comprises a vibration damper outer cylinder 1, a magnetorheological rotating assembly 2 is arranged at the lower end of the vibration damper outer cylinder 1, a screw seat 3 is arranged at the upper end of the vibration damper outer cylinder 1, and a rotating cylinder 4 is also arranged inside the vibration damper outer cylinder 1, the rotating cylinder 4 is correspondingly fixed in the vibration damper outer cylinder 1 by an outer bearing assembly 5, and the rotating cylinder 4 is connected and installed as a whole with the screw seat 3 above, and when the screw seat 3 rotates, the rotating cylinder 4 is correspondingly driven to rotate as a whole;

[0025] A ball screw 6 is correspondingly installed in the screw seat 3. The ball screw 6 is inserted into the screw seat 3 from the upper end of the shock absorber outer cylinder 1 and extends downward into the rotating cylinder 4. The lower end of the rotating cylinder 4 is also connected with a rotating shaft 7, which extends into the magnetorheological rotating component 2.

[0026] The magnetorheological rotating assembly 2 includes a magnetorheological chamber 8, which includes a U-shaped chamber cylinder 9 and a chamber sealing plate 10 at the upper end of the chamber cylinder 9; a magnetorheological fluid is arranged in the magnetorheological chamber 8, and a fixed excitation coil 11 is also arranged in the magnetorheological chamber 8;

[0027] The rotating shaft 7 at the lower end of the rotating cylinder 4 passes downward through the magnetorheological chamber 8 and is fixed to the lower end of the shock absorber outer cylinder 1 through a bearing. A rotor 12 is also provided on the rotating shaft 7. The rotor 12 is located in the magnetorheological chamber 8 and is configured as a U-shaped cylindrical structure. The rotor 12 is correspondingly located between the excitation coil 11 and the chamber cylinder 9. The rotor 12 surrounds the excitation coil 11 as a whole.

[0028] The lower end of the screw seat 3 is provided with an extension cylinder 13 extending downward, and the upper end of the rotating cylinder 4 is correspondingly fixed to the outer side of the extension cylinder 13 and installed integrally with the screw seat 3 .

[0029] A rotating seat 14 is also provided at the upper end of the screw seat 3. The rotating seat 14 is fixed to the inner upper end of the shock absorber outer cylinder 1 and is installed integrally with the screw seat 3. The ball screw 6 passes through the screw seat 3 and the rotating seat 14 and extends downward into the rotating cylinder 4.

[0030] The upper end of the ball screw 6 is also provided with an elastic buffer block 15 and a fixed lifting ring 16 ; the lower end of the shock absorber outer cylinder 1 is also provided with a detachable cylinder cover 17 .

[0031] The working principle of this device is as follows: the fixed lifting ring at the upper end of the ball screw in this device is used to connect and install the wheel or the vehicle body, and the designed elastic buffer block has a buffering effect. When the vehicle is driving, when the wheel and the vehicle body are bumped and displaced, the ball screw moves back and forth accordingly in the outer cylinder of the shock absorber. The ball screw itself is fixedly connected to the external vehicle body, so the ball screw does not rotate. Therefore, when the ball screw moves linearly, it will cause the internal screw seat to rotate, and the screw seat and the rotating cylinder are installed in one piece, thereby driving the rotating cylinder to rotate accordingly.

[0032] In the above process, first of all, in order to facilitate the installation of the ball screw and the rationality of the position setting, the ball screw is extended into the rotating cylinder accordingly. After this design, the ball screw itself is relatively long and needs to move back and forth with the bumps of the vehicle, so the specific position setting is relatively reasonable; in addition, when the ball screw only undergoes linear displacement, the screw seat needs to undergo rotational motion, so the position installation of the screw seat also needs to be very stable. First of all, the screw seat is installed integrally with the rotating cylinder, and the rotating cylinder is fixed in the outer cylinder of the shock absorber by corresponding rotation of the bearing member, so the position of the screw seat in the outer cylinder of the shock absorber is relatively stable; and in addition, a rotating seat is provided in the outer cylinder of the shock absorber, the rotating seat is located at the upper end of the screw seat, and is fixed in the outer cylinder of the shock absorber, and the ball screw passes through the rotating seat accordingly, so that the screw seat can rotate stably.

[0033] When the rotating cylinder rotates accordingly, it drives the rotating shaft at its lower end to rotate. The lower end of the vibration-damping outer cylinder is provided with a magnetorheological rotating component, which is mainly provided with a magnetorheological chamber, and then the magnetorheological fluid is stored in the magnetorheological chamber and an excitation coil is installed inside; the rotating main shaft extends into the magnetorheological chamber and a cylindrical patent is installed accordingly, surrounding the excitation coil inside; when the rotating main shaft drives the rotor to rotate, on the one hand, it stirs the magnetorheological fluid inside, and the magnetorheological fluid exhibits Bingham fluid mechanics characteristics, and on the other hand, it shears the excitation coil to generate the damping force required by the shock absorber, thereby effectively achieving the purpose of vibration reduction.

[0034] The above-mentioned specific implementation mode is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A rotary magnetorheological damper, characterized in that: The invention comprises a shock absorber outer cylinder (1), wherein a magnetorheological rotating assembly (2) is arranged at the lower end of the shock absorber outer cylinder (1), a screw seat (3) is arranged at the upper end of the shock absorber outer cylinder (1), and a rotating cylinder (4) is also arranged inside the shock absorber outer cylinder (1), wherein the rotating cylinder (4) is correspondingly rotatably fixed in the shock absorber outer cylinder (1) via an outer bearing assembly (5), and the rotating cylinder (4) is connected and installed integrally with the screw seat (3) above, and when the screw seat (3) rotates, the rotating cylinder (4) is correspondingly driven to rotate integrally; A ball screw (6) is correspondingly installed in the screw seat (3), and the ball screw (6) is inserted into the screw seat (3) from the upper end of the shock absorber outer cylinder (1), and extends downward into the rotating cylinder (4); the lower end of the rotating cylinder (4) is also connected to a rotating shaft (7), and the rotating shaft (7) correspondingly extends into the magnetorheological rotating component (2).

2. A rotary magnetorheological damper according to claim 1, characterized in that: The magnetorheological rotating assembly (2) comprises a magnetorheological chamber (8), the magnetorheological chamber (8) comprising a U-shaped chamber cylinder (9) and a chamber sealing plate (10) at the upper end of the chamber cylinder (9); a magnetorheological fluid is arranged in the magnetorheological chamber (8), and a fixed excitation coil (11) is also arranged in the magnetorheological chamber (8); The rotating shaft (7) at the lower end of the rotating cylinder (4) passes downward through the magnetorheological chamber (8) and is fixed to the lower end of the shock absorber outer cylinder (1) via a bearing member. A rotor (12) is also provided on the rotating shaft (7). The rotor (12) is located in the magnetorheological chamber (8). The rotor (12) is configured as a U-shaped cylindrical structure and is located between the excitation coil (11) and the chamber cylinder (9). The rotor (12) surrounds the excitation coil (11) as a whole.

3. A rotary magnetorheological damper according to claim 1, characterized in that: The lower end of the screw seat (3) is provided with an extension cylinder (13) extending downward, and the upper end of the rotating cylinder (4) is correspondingly fixed to the outer side of the extension cylinder (13) and installed integrally with the screw seat (3).

4. A rotary magnetorheological damper according to claim 3, characterized in that: The upper end of the screw seat (3) is also provided with a rotating seat (14), which is fixed to the upper inner end of the shock absorber outer cylinder (1) and is installed integrally with the screw seat (3), and the ball screw (6) passes through the screw seat (3) and the rotating seat (14) and extends downward into the rotating cylinder (4).

5. The rotary magnetorheological damper according to claim 1, characterized in that: The upper end of the ball screw (6) is also provided with an elastic buffer block (15) and a fixed lifting ring (16).

6. A rotary magnetorheological damper according to claim 1, characterized in that: A detachable cylinder cover (17) is also provided at the lower end of the shock absorber outer cylinder (1).

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