阅读说明：本技术 一种新型磁流变弹性体减震器 (Novel magnetorheological elastomer shock absorber ) 是由 刘旭辉 张远方 胡慧娜 李振武 付泽民 徐彬 姚行艳 董振标 王智深 于 2021-05-25 设计创作，主要内容包括：本发明提供了一种新型磁流变弹性体减震器,包括：上吊环、拉压力传感器、连接筋、上端盖、减震筒、第一缓冲弹簧、第二缓冲弹簧、环形磁流变弹性体、线框、线圈、下端盖、张紧减震盘、活塞、活塞杆、下吊环；上吊环与拉压力传感器连接,拉压力传感器与连接筋连接,连接筋嵌入上端盖,上端盖的凸台嵌入减震筒的上端,下端盖的凸台嵌入减震筒的下端,第一缓冲弹簧嵌套在减震筒的外部,连接筋的下端设置有第二缓冲弹簧,第二缓冲弹簧的下端设置有活塞,活塞连接活塞杆,活塞杆连接下吊环,环形磁流变弹性体嵌套在第二缓冲弹簧和活塞的外部,线框设置在减震筒和环形磁流变弹性体之间。本发明采用磁流变弹性体材料使减震器的控制精度高、反应灵敏。(The invention provides a novel magnetorheological elastomer shock absorber, which comprises: the device comprises an upper lifting ring, a tension and pressure sensor, a connecting rib, an upper end cover, a damping cylinder, a first buffer spring, a second buffer spring, an annular magnetorheological elastomer, a wire frame, a coil, a lower end cover, a tensioning damping disc, a piston rod and a lower lifting ring; the upper lifting ring is connected with the tension pressure sensor, the tension pressure sensor is connected with the connecting rib, the connecting rib is embedded into the upper end cover, the boss of the upper end cover is embedded into the upper end of the damping cylinder, the boss of the lower end cover is embedded into the lower end of the damping cylinder, the first buffer spring is nested outside the damping cylinder, the lower end of the connecting rib is provided with the second buffer spring, the lower end of the second buffer spring is provided with the piston, the piston is connected with the piston rod, the piston rod is connected with the lower lifting ring, the annular magnetorheological elastomer is nested outside the second buffer spring and the piston, and the wire frame is arranged between the damping cylinder and the annular magnetorheological elastomer. The invention adopts the magnetorheological elastomer material to ensure that the control precision of the shock absorber is high and the response is sensitive.)

1. A novel magnetorheological elastomer shock absorber, comprising: the device comprises an upper lifting ring, a tension and pressure sensor, a connecting rib, an upper end cover, a damping cylinder, a first buffer spring, a second buffer spring, an annular magnetorheological elastomer, a wire frame, a coil, a lower end cover, a tensioning damping disc, a piston rod and a lower lifting ring; the upper lifting ring is connected with the upper end of the tension and pressure sensor, the lower end of the tension and pressure sensor is connected with the upper end of the connecting rib, the lower end of the connecting rib is embedded into the center of the upper end cover, and the connecting rib and the upper end cover are connected into a whole; the boss on the lower end face of the upper end cover is embedded into the upper end of the damping cylinder, and the upper end cover is connected with the damping cylinder; the boss on the upper end surface of the lower end cover is embedded into the lower end of the damping cylinder, and the lower end cover is connected with the damping cylinder; the first buffer spring is nested outside the shock-absorbing cylinder, the upper end of the first buffer spring is connected with the upper end cover, the lower end of the first buffer spring is connected with the tensioning shock-absorbing disc, and the tensioning shock-absorbing disc is arranged below the lower end cover; the lower end of the connecting rib is provided with the second buffer spring, the lower end of the second buffer spring is provided with the piston, the lower end of the piston is connected with the piston rod, the piston rod penetrates through the centers of the lower end cover and the tensioning damping disc, and the lower end of the piston rod is connected with the lower hanging ring; the annular magnetorheological elastomer is arranged inside the shock absorption cylinder and is nested outside the second buffer spring and the piston; the wire frame is arranged between the shock absorption cylinder and the annular magnetorheological elastomer, and the coil is wound on the wire frame.

2. The novel magnetorheological elastomer shock absorber of claim 1, further comprising a power module and a control module, wherein the power module is connected to the coil via a wire, and the control module is connected to the tension and pressure sensor and the power module.

3. The new magnetorheological elastomer shock absorber according to claim 1, wherein the second damping spring is embedded in the upper end of the piston.

4. The new magnetorheological elastomer shock absorber according to claim 1, wherein the upper end cap, the lower end cap and the piston are provided with through holes.

5. The new magnetorheological elastomer shock absorber according to claim 1, wherein the piston and the shock tube are made of a high permeability, high saturation strength material.

6. The new magnetorheological elastomer shock absorber according to claim 5, wherein the piston and the shock tube are made of pure iron.

7. The novel magnetorheological elastomer shock absorber of claim 1, wherein the annular magnetorheological elastomer is a mixture of iron hydroxyl powder, 704 silicone rubber and dimethicone.

8. The novel magnetorheological elastomer shock absorber of claim 7, wherein the annular magnetorheological elastomer comprises iron oxyhydroxide, 704 silicone rubber, and dimethicone in a mass ratio of 2: 7: 1.

Technical Field

The invention relates to the technical field of shock absorbers, in particular to a novel magnetorheological elastomer shock absorber.

Background

In the process of automobile driving, the elastic element in the suspension system is impacted to generate vibration, and in order to improve the driving stability of the automobile, a shock absorber is arranged in the suspension in parallel with the elastic element. Shock absorbers used in automotive suspensions can be classified into passive type and active type. Passive shock absorbers, such as traditional passive hydraulic shock absorbers, achieve the damping effect by damping oil flowing through a check valve, but have high requirements on the sealing performance of the shock absorbers, generate a large amount of heat in the shock absorption process, cannot dissipate heat in time, cannot change the damping coefficient of the shock absorbers according to road condition information, and cannot meet the comfort level of drivers and passengers in the driving process to the maximum extent; the active shock absorber adopts an active suspension system capable of adjusting damping force and spring stiffness, and the damping force and the spring stiffness are changed according to road conditions and vehicle running conditions so as to meet the requirements of riding comfort and running safety, but the structure of the active shock absorber is complex and the cost is high.

The magnetorheological elastomer is a novel magnetorheological intelligent material and is developed on the basis of magnetorheological fluid. The liquid mother body in the magnetorheological fluid is replaced by an elastomer material, and the composite material with magnetic particles dispersed in the elastomer can be prepared. Therefore, compared with the magnetorheological fluid, the magnetorheological fluid not only keeps the characteristics of reversibility, controllability and quick response, but also has the advantages of good stability, difficult abrasion, difficult sedimentation and the like.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a novel magnetorheological elastomer shock absorber, which improves the stability and the reaction speed of the shock absorber.

According to the present invention, there is provided a novel magnetorheological elastomer shock absorber, comprising: the device comprises an upper lifting ring, a tension and pressure sensor, a connecting rib, an upper end cover, a damping cylinder, a first buffer spring, a second buffer spring, an annular magnetorheological elastomer, a wire frame, a coil, a lower end cover, a tensioning damping disc, a piston rod and a lower lifting ring; the upper lifting ring is connected with the upper end of the tension and pressure sensor, the lower end of the tension and pressure sensor is connected with the upper end of the connecting rib, the lower end of the connecting rib is embedded into the center of the upper end cover, and the connecting rib and the upper end cover are connected into a whole; the boss on the lower end face of the upper end cover is embedded into the upper end of the damping cylinder, and the upper end cover is connected with the damping cylinder; the boss on the upper end surface of the lower end cover is embedded into the lower end of the damping cylinder, and the lower end cover is connected with the damping cylinder; the first buffer spring is nested outside the shock-absorbing cylinder, the upper end of the first buffer spring is connected with the upper end cover, the lower end of the first buffer spring is connected with the tensioning shock-absorbing disc, and the tensioning shock-absorbing disc is arranged below the lower end cover; the lower end of the connecting rib is provided with the second buffer spring, the lower end of the second buffer spring is provided with the piston, the lower end of the piston is connected with the piston rod, the piston rod penetrates through the centers of the lower end cover and the tensioning damping disc, and the lower end of the piston rod is connected with the lower hanging ring; the annular magnetorheological elastomer is arranged inside the shock absorption cylinder and is nested outside the second buffer spring and the piston; the wire frame is arranged between the shock absorption cylinder and the annular magnetorheological elastomer, and the coil is wound on the wire frame.

Further, the device also comprises a power supply module and a control module, wherein the power supply module is connected with the coil through a lead, and the control module is connected with the tension and pressure sensor and the power supply module.

Further, the upper end of the piston is embedded in the second buffer spring.

Furthermore, through holes are formed in the upper end cover, the lower end cover and the piston.

Preferably, the piston and the damper cylinder are made of a material with high magnetic permeability and high magnetic saturation strength.

Preferably, the material of the piston and the damper cylinder is pure iron.

Preferably, the material of the annular magnetorheological elastomer is a mixture of hydroxyl iron powder, 704 silicone rubber and dimethyl silicone oil.

Preferably, the mass ratio of the hydroxyl iron powder, the 704 silicon rubber and the dimethyl silicon oil in the annular magnetorheological elastomer is 2: 7: 1.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the annular magnetorheological elastomer material, the annular magnetorheological elastomer is solid, the sealing problem of the shock absorber does not need to be considered, and the connection of the shock absorber device is simplified.

2. The novel magnetorheological elastomer shock absorber is characterized in that the periphery of the piston is provided with a plurality of through holes, and the through holes are used for dissipating heat generated by friction when the shock absorber works.

3. The novel magnetorheological elastomer shock absorber disclosed by the invention adopts the magnetorheological elastomer material with high reaction speed, good reversibility and strong controllability, so that the shock absorber is high in control precision and sensitive in reaction.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

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

FIG. 2 is an isometric view of the novel magnetorheological elastomer shock absorber provided in accordance with the present invention;

FIG. 3 is an exploded view of the new magnetorheological elastomer shock absorber of the present invention.

In the figure:

1-hanging a ring;

2-a pull pressure sensor;

3-connecting ribs;

4-upper end cover;

5-a shock-absorbing cylinder;

6-a first buffer spring;

7-a second buffer spring;

8-an annular magnetorheological elastomer;

9-wire frame;

10-a coil;

11-lower end cap;

12-tensioning a damping disc;

13-a piston;

14-a piston rod;

15-lower lifting ring;

16-a power supply module;

17-a control module.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1 and 3, the novel magnetorheological elastomer shock absorber of the present invention comprises an upper suspension ring 1, a tension and pressure sensor 2, a connecting rib 3, an upper end cover 4, a shock absorbing cylinder 5, a first buffer spring 6, a second buffer spring 7, an annular magnetorheological elastomer 8, a wire frame 9, a coil 10, a lower end cover 11, a tensioning shock absorbing disc 12, a piston 13, a piston rod 14, a lower suspension ring 15, a power module 16, and a control module 17.

The upper hoisting ring 1 is connected with the tension and pressure sensor 2 through a stud, and the tension and pressure sensor 2 is connected with the connecting rib 3 through a stud. As shown in fig. 1 and 2, the tension/pressure sensor 2 is enclosed in the area enclosed by the upper hanging ring 1 and the connecting rib 3. The centers of the upper end cover 4 and the lower end cover 11 are provided with holes, and one surfaces of the upper end cover 4 and the lower end cover 11 are provided with bosses. The lower end of the connecting rib 3 is embedded into the central hole of the upper end cover 4 and is connected with the upper end cover 4 into a whole. The boss of upper end cover 4 is located the downside, and the boss embedding damper cylinder 5's upper end, and upper end cover 4 passes through the screw to be connected with damper cylinder 5. The boss of the lower end cover 11 is positioned on the upper side surface, the boss of the lower end cover 11 is embedded into the lower end of the shock-absorbing cylinder 5, and the lower end cover 11 is connected with the shock-absorbing cylinder 5 through screws.

The first buffer spring 6 is nested outside the shock absorption cylinder 5, the upper end of the first buffer spring is connected with the upper end cover 4, the lower end of the first buffer spring is connected with the tensioning shock absorption disc 12, and the tensioning shock absorption disc 12 is located below the lower end cover 11. The tensioning damper disc 12 tensions the first damper spring 6 by the positioning of the upper and lower nuts.

As shown in fig. 1, the second buffer spring 7 is located below the connecting rib 3 and is inserted into the central hole of the upper cover 4. A piston 13 is arranged below the second buffer spring 7, the upper end of the piston 13 is embedded in the second buffer spring 7, and the lower end of the piston 13 is connected with a piston rod 14. The piston rod 14 passes through the center hole of the lower end cover 11 and the center of the tensioning damping disc 12 in sequence, and the lower end of the piston rod 14 is connected with a lower lifting ring 15.

The annular magnetorheological elastomer 8 is arranged inside the shock absorption cylinder 5 and is nested outside the second buffer spring 7 and the piston 13. The wire frame 9 is arranged in a groove between the annular magnetorheological elastomer 8 and the shock absorption cylinder 5, and the wire frame 9 is wound with a coil 10. The power supply module 16 is connected with the coil 10 through a lead, and the control module 17 is connected with the pull pressure sensor 2 and the power supply module 16.

As shown in fig. 1 and 3, in the present embodiment, four circular holes are uniformly distributed on the circumferences of the upper end 4, the lower end cap 11 and the piston 13 to dissipate heat generated by friction when the shock absorber operates.

The material of the piston 13 and the damper cylinder 5 is preferably pure iron with high magnetic permeability and high magnetic saturation. The annular magnetorheological elastomer 8 is prepared from hydroxyl iron powder, 704 silicon rubber and dimethyl silicone oil according to the mass fraction of 2: 7: 1, so that the annular magnetorheological elastomer has better shearing mechanical property. The annular magnetorheological elastomer 8 made of the material is solid, and the sealing problem of the shock absorber is not considered.

In this embodiment, when a current is input into the damper, magnetic lines of force of the damper are generated from the piston 13, radially pass through the annular magnetorheological elastomer 8, enter the damper cylinder 5, move in the axial direction, and radially pass through the annular magnetorheological elastomer 8 from the damper cylinder 5 and return to the piston 13, so as to form a closed loop. When the magnetic force lines radially pass through the annular magnetorheological elastomer 8, the magnetic particles in the annular magnetorheological elastomer 8 are radially distributed, so that shearing force is generated, the relative motion of the piston 13 and the damping cylinder 5 is prevented, and the buffering and damping effects are achieved.

In this embodiment, when the vehicle body suspension is vibrated and pressed against the magnetorheological elastomer damper connected therewith, the impact force is transmitted to the tension and pressure sensor 2, the connecting rib 3, the upper end cover 4, the first buffer spring 6, the tension and shock absorption disc 12, the piston rod 14 and the lower suspension ring 15 along the upper suspension ring 1. When the damping cylinder 5 integrally descends, the second buffer spring 7 is extruded, the piston 13 descends to form secondary buffering of the damper, the control module 17 collects data of the tension pressure sensor 2 at the moment, the control module 17 controls the power supply module 16 to output proper current according to the collected pressure data, magnetic lines of force generated by the current enable magnetic particles in the annular magnetorheological elastomer 8 to be chained along the radial direction, and therefore shearing force is generated, relative movement of the piston 13 and the damping cylinder 5 is prevented, and the damping effect is achieved.

The novel magnetorheological elastomer shock absorber disclosed by the invention adopts the magnetorheological elastomer material with high reaction speed, good reversibility and strong controllability, so that the shock absorber is high in control precision and sensitive in reaction, meanwhile, the sealing of the shock absorber is not required to be considered, the connection of the device is simplified, and a good technical effect is achieved.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.