Magnetorheological damper convenient to maintain

Abstract

The utility model relates to the technical field of shock absorbers, and discloses a magnetorheological shock absorber convenient to maintain, which comprises an outer cylinder and an inner cylinder, a liquid injection hole and a liquid discharge hole are respectively arranged on the side walls of the upper end and the lower end of the inner cylinder in a penetrating manner, and plugging components are arranged at one end, close to the outer cylinder, of the liquid injection hole and on the inner sides of the liquid injection hole and the liquid discharge hole. And extrusion pieces are connected into the liquid drainage holes and abut against the adjacent plugging assemblies, and operation holes matched with the liquid injection holes are formed in the outer wall of the outer cylinder in a penetrating mode. According to the magnetorheological shock absorber convenient to maintain, through the operation hole, the liquid injection hole and the liquid drainage hole, replacement of magnetorheological fluid in the inner cylinder can be completed under the condition that the outer cylinder and the inner cylinder of the magnetorheological shock absorber are not detached, and therefore the connection sealing performance between the inner cylinder and the outer cylinder of the magnetorheological shock absorber is guaranteed, and the replacement efficiency of the magnetorheological fluid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration dampers, in particular to a magnetorheological vibration damper which is easy to maintain. Background Art

[0002] Magnetorheological Dampers (MRD) are advanced vibration damping devices based on magnetorheological fluid technology. Magnetorheological fluid is a mixture of tiny ferromagnetic particles suspended in a non-conductive liquid. Its viscosity can change rapidly in response to changes in the external magnetic field. When a magnetic field is applied, the magnetorheological fluid changes from a low viscosity state to a high viscosity state, thereby changing its flow resistance.

[0003] Magnetorheological shock absorbers use this characteristic to achieve the effect of dynamically adjusting damping. In the fields of vehicles, building structures, aerospace, etc., they can quickly adjust their damping coefficients according to real-time vibration or impact conditions to provide the best vibration reduction effect. For example, in the automobile suspension system, magnetorheological shock absorbers can automatically adjust according to road conditions and driving conditions to provide a smoother ride and better handling performance.

[0004] However, with the increase of usage time and cycle, the tiny magnetic particles in the magnetorheological fluid may aggregate, precipitate or oxidize, resulting in a weakening of the magnetorheological effect; this means that even under the same magnetic field strength, the viscosity change of the magnetorheological fluid may not be as significant as that of the new fluid, thus affecting the damping performance of the shock absorber, and during long-term use, the magnetorheological fluid may absorb or carry debris, moisture or other contaminants produced by mechanical wear, which will affect the distribution and fluidity of the magnetic particles, and further affect the response speed and efficiency of the magnetorheological fluid. Therefore, during the use of the magnetorheological shock absorber, it is necessary to regularly disassemble the magnetorheological shock absorber and replace the magnetorheological fluid inside it to ensure that the shock absorber can continue to provide a stable and efficient damping effect; regular maintenance and replacement of magnetorheological fluid is an important measure to ensure the long-term and reliable operation of the magnetorheological shock absorber.

[0005] When replacing the magnetorheological fluid of a traditional magnetorheological fluid shock absorber, it is necessary to ensure that the shock absorber is completely powered off, and then use special tools to completely disassemble the upper and lower sleeves of the shock absorber to leak out the internal magnetorheological fluid chamber and replace it. This makes the replacement of the magnetorheological fluid more complicated, and the sealing effect between the upper and lower sleeves cannot be guaranteed during reinstallation, which brings certain safety hazards to the subsequent use of the magnetorheological fluid shock absorber. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a magnetorheological damper that is easy to maintain. For example, the magnetorheological fluid inside the magnetorheological damper can be replaced without disassembling the magnetorheological fluid damper, thereby simplifying the magnetorheological fluid replacement process and avoiding the reduction in sealing effect that may be caused by disassembling the magnetorheological fluid damper.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a magnetorheological damper that is easy to maintain, comprising an outer cylinder and an inner cylinder, wherein the side walls of the inner cylinder at the upper and lower ends are respectively penetrated with an injection hole and a drainage hole, the injection hole is close to one end of the outer cylinder, and the inner sides of the injection hole and the drainage hole are both provided with a plugging assembly, an extrusion piece is connected to the drainage hole, and the extrusion piece is abutted against the adjacent plugging assembly, and an operating hole matching the injection hole is penetrated through the outer wall of the outer cylinder.

[0008] Furthermore, the blocking assembly includes a blocking block, two connecting blocks and two return springs. The blocking block is located in the inner cylinder and on the inner side of an adjacent injection hole or a drainage hole. The two connecting blocks are respectively fixedly connected to the two sides of one end of the blocking block away from the injection hole or the drainage hole. One end of the two return springs is respectively fixedly connected to the two connecting blocks. The other ends of the two return springs are both fixedly connected to the inner wall of the inner cylinder. One end of the blocking block away from the two connecting blocks is against the adjacent injection hole or the drainage hole. The diameters of the injection hole and the drainage hole are both smaller than the diameter of the blocking block.

[0009] Furthermore, the injection hole and the drainage hole are both provided with matching grooves at one end close to the adjacent blocking blocks, and the two blocking blocks are respectively slidably connected to the two matching grooves and respectively abut against the ends of the two matching grooves.

[0010] Furthermore, a limit rod is slidably connected inside the reset spring, one end of the limit rod is fixedly connected to the inner wall of the inner cylinder, and the other end passes through the inner hole of the reset spring and penetrates the adjacent connecting block, and the limit rod is slidably connected to the connecting block.

[0011] Furthermore, an anti-dropout sheet is fixedly connected to one end of the limiting rod away from the reset spring, and the anti-dropout sheet abuts against a side of the connecting block away from the reset spring.

[0012] Furthermore, the extrusion part includes an externally threaded column, which is threadedly connected to the inner wall of the drainage hole, the end of the externally threaded column is abutted against the adjacent sealing block, a disassembly hole is penetrated through one side of the externally threaded column close to the sealing block, and a plurality of flow holes connected to the disassembly hole are opened on the side wall of the externally threaded column close to one end of the sealing block.

[0013] Furthermore, the disassembly hole is a hexagonal hole.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The magnetorheological damper, which is easy to maintain, can replace the magnetorheological fluid inside the inner cylinder without disassembling the outer cylinder and the inner cylinder of the magnetorheological damper through the operation hole, the injection hole and the drainage hole, thereby ensuring the connection sealing between the inner cylinder and the outer cylinder of the magnetorheological damper and improving the replacement efficiency of the magnetorheological fluid. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 Based on Figure 1 A cross-sectional schematic diagram of a connection structure;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the connection structure at center A;

[0019] Figure 4 for Figure 2 A magnified schematic diagram of the connection structure at B in the middle;

[0020] Figure 5 This is a schematic diagram of the connection structure of the plugging component of the utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure of the plugging component of the utility model from another angle;

[0022] Figure 7 This is a schematic diagram of the appearance structure of the external threaded column of the utility model.

[0023] In the figure: 1. outer cylinder; 2. inner cylinder; 3. sealing block; 4. connecting block; 5. reset spring; 6. external threaded column; 7. limit rod; 8. anti-slip sheet; 101. operation hole; 201. injection hole; 202. drainage hole; 203. matching groove; 601. circulation hole; 602. disassembly hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1 - Figure 7A magnetorheological damper that is easy to maintain includes an outer cylinder 1 and an inner cylinder 2. The side walls of the inner cylinder 2 at the upper and lower ends are respectively penetrated with an injection hole 201 and a discharge hole 202. The injection hole 201 is close to one end of the outer cylinder 1. The inner sides of the injection hole 201 and the discharge hole 202 are both provided with a plugging component. The discharge hole 202 is connected with an extrusion piece, which abuts against the adjacent plugging component. The outer wall of the outer cylinder 1 is penetrated with an operation hole 101 that matches the injection hole 201.

[0026] like Figure 1 - Figure 5 As shown, the magnetorheological damper in the utility model which is easy to maintain is similar to the existing magnetorheological damper in structure. The main improvement of the utility model is to improve the replacement efficiency of the magnetorheological fluid and ensure the sealing effect of the damper. Figures 1 to 7 As shown, when the magnetorheological damper of the utility model which is easy to maintain is used, when the magnetorheological fluid inside the damper needs to be replaced, the damper can be powered off and placed in a non-retractable state, and the operating hole 101 is aligned with the injection hole 201, and then the sealing component in the drainage hole 202 is squeezed inwardly by an extrusion piece, so that the drainage hole 202 is connected with the inner tube 2, so that the magnetorheological fluid inside the inner tube 2 can flow out from the inner tube 2 through the drainage hole 202. At the same time, an air pump can be connected at the injection hole 201 position, and gas can be added to the inner tube 2 through the air pump. The gas applies pressure to the magnetorheological fluid inside, so that the magnetorheological fluid inside can flow out from the drainage hole 202 more quickly. After waiting for the old magnetorheological fluid inside to be discharged from the inner tube 2, a water pipe can be connected to rinse and clean the inside, and the magnetorheological fluid inside the inner tube 2 and its After he has finished cleaning the cleaning liquid, he inverts the injection hole 201 and the discharge hole 202 so that the injection hole 201 is located at the bottom, and then uses a syringe or other filling tool to fill the new magnetorheological fluid from the injection hole 201 into the inner tube 2. During the filling process, the air inside the original magnetorheological fluid cavity is gradually pushed upward and discharged from the discharge hole 202. When the new magnetorheological fluid is filled, the sealing component automatically blocks the injection hole 201, and then the contact extrusion piece squeezes the sealing component in the discharge hole 202, thereby blocking the discharge hole 202. At this time, the replacement of the magnetorheological fluid is completed, and the replacement of the magnetorheological fluid inside the shock absorber can be completed without disassembling the entire shock absorber, thereby ensuring the connection sealing performance between the outer tube 1 and the inner tube 2, reducing the difficulty of disassembly when replacing the shock absorber and the magnetorheological fluid, and improving the maintenance efficiency of the magnetorheological shock absorber.

[0027] like Figure 3 - Figure 6As shown, the blocking assembly includes a blocking block 3, two connecting blocks 4 and two return springs 5. The blocking block 3 is located in the inner tube 2 and is located on the inner side of the adjacent injection hole 201 or the drainage hole 202. The two connecting blocks 4 are respectively fixedly connected to the two sides of one end of the blocking block 3 away from the injection hole 201 or the drainage hole 202. One ends of the two return springs 5 ​​are respectively fixedly connected to the two connecting blocks 4, and the other ends of the two return springs 5 ​​are both fixedly connected to the inner wall of the inner tube 2. The end of the blocking block 3 away from the two connecting blocks 4 is against the adjacent injection hole 201 or the drainage hole 202. The diameters of the injection hole 201 and the drainage hole 202 are both smaller than the diameter of the blocking block 3. The return spring 5 can always pull and squeeze the blocking block 3 against the inner wall of the inner tube 2 through the two connecting blocks 4, thereby sealing the corresponding injection hole 201 and the discharge hole 202. At the same time, the magnetorheological fluid inside the inner tube 2 can provide an extrusion force to the blocking block 3, so that the blocking block 3 is more firmly pressed against the inner wall of the inner tube 2, thereby sealing the injection hole 201 and the discharge hole 202.

[0028] like Figure 3 and Figure 4 As shown, the injection hole 201 and the drainage hole 202 are both provided with a matching groove 203 at one end close to the adjacent blocking block 3, and the two blocking blocks 3 are respectively slidably connected with the two matching grooves 203 and respectively abut against the ends of the two matching grooves 203. Through the connection between the blocking block 3 and the matching groove 203, the blocking block 3 has a blocking effect on the injection hole 201 and the drainage hole 202.

[0029] like Figure 3 - Figure 6 As shown, the return spring 5 is slidably connected with a limit rod 7, one end of the limit rod 7 is fixedly connected to the inner wall of the inner tube 2, and the other end passes through the inner hole of the return spring 5 and penetrates the adjacent connecting block 4, and the limit rod 7 is slidably connected to the connecting block 4. When the blocking block 3 is pulled by the two return springs 5 ​​and abuts against the inner side of the inner tube 2, the limit rod 7 can prevent the return spring 5 from shaking when the internal magnetorheological fluid flows, causing the blocking block 3 to deviate from the original position, ensuring that the blocking block 3 can stably block the injection hole 201 or the discharge hole 202, thereby improving the stability of the blockage.

[0030] like Figure 6 As shown, the end of the limit rod 7 away from the reset spring 5 is fixedly connected with an anti-drop sheet 8, and the anti-drop sheet 8 abuts against the side of the connecting block 4 away from the reset spring 5. The anti-drop sheet 8 can prevent the connection between the connecting block 4 and the limit rod 7 from falling off, making the blocking movement of the blocking block 3 more stable.

[0031] like Figure 4 and Figure 7As shown, the extrusion piece includes an external thread column 6, which is threadedly connected to the inner wall of the drainage hole 202, and the end of the external thread column 6 is against the adjacent blocking block 3. A disassembly hole 602 is formed through the side of the external thread column 6 close to the blocking block 3, and a plurality of flow holes 601 connected to the disassembly hole 602 are formed on the side wall of the external thread column 6 close to the blocking block 3. The external thread column 6 rotates in the thread of the drainage hole 202, thereby gradually squeezing and moving the blocking block 3 into the inner tube 2, and then the magnetorheological fluid inside the inner tube 2 can flow into the disassembly hole 602 through the plurality of flow holes 601 at the end of the external thread column 6, and flow from the disassembly hole 602 to the outside, thereby completing the discharge of the old magnetorheological fluid.

[0032] like Figure 4 and Figure 7 As shown, the disassembly hole 602 is a hexagonal hole. When the disassembly hole 602 is designed as a hexagonal hole, a hexagonal wrench can be inserted into the hexagonal disassembly hole 602 when rotating the external thread column 6, making it easier to rotate the external thread column 6.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A magnetorheological damper that is easy to maintain, comprising an outer cylinder (1) and an inner cylinder (2), characterized in that: The side walls at the upper and lower ends of the inner cylinder (2) are respectively provided with an injection hole (201) and a discharge hole (202); the injection hole (201) is close to one end of the outer cylinder (1); the inner sides of the injection hole (201) and the discharge hole (202) are provided with a blocking component; an extrusion piece is connected inside the discharge hole (202); the extrusion piece abuts against an adjacent blocking component; and an operation hole (101) matching the injection hole (201) is provided through the outer wall of the outer cylinder (1).

2. The magnetorheological damper easy to maintain according to claim 1, characterized in that: The blocking assembly comprises a blocking block (3), two connecting blocks (4) and two return springs (5); the blocking block (3) is located inside the inner tube (2) and inside an adjacent injection hole (201) or a discharge hole (202); the two connecting blocks (4) are respectively fixedly connected to the two sides of an end of the blocking block (3) away from the injection hole (201) or the discharge hole (202); one end of the two return springs (5) are respectively fixedly connected to the two connecting blocks (4); the other ends of the two return springs (5) are both fixedly connected to the inner wall of the inner tube (2); the end of the blocking block (3) away from the two connecting blocks (4) abuts against the adjacent injection hole (201) or the discharge hole (202); the diameters of the injection hole (201) and the discharge hole (202) are both smaller than the diameter of the blocking block (3).

3. The magnetorheological damper easy to maintain according to claim 2, characterized in that: The injection hole (201) and the discharge hole (202) are both provided with matching grooves (203) at one end close to the adjacent blocking block (3); the two blocking blocks (3) are respectively slidably connected to the two matching grooves (203) and respectively abut against the ends of the two matching grooves (203).

4. A magnetorheological damper that is easy to maintain according to claim 2 or 3, characterized in that: The return spring (5) is slidably connected to a limit rod (7), one end of the limit rod (7) is fixedly connected to the inner wall of the inner tube (2), and the other end passes through the inner hole of the return spring (5) and penetrates the adjacent connecting block (4), and the limit rod (7) is slidably connected to the connecting block (4).

5. The magnetorheological damper easy to maintain according to claim 4, characterized in that: An end of the limiting rod (7) away from the reset spring (5) is fixedly connected with an anti-dropping piece (8), and the anti-dropping piece (8) abuts against a side of the connecting block (4) away from the reset spring (5).

6. A magnetorheological damper that is easy to maintain according to claim 2, 3 or 5, characterized in that: The extrusion component comprises an external thread column (6), the external thread column (6) is threadedly connected to the inner wall of the drainage hole (202), the end of the external thread column (6) is abutted against the adjacent blocking block (3), a disassembly hole (602) is penetrated through the side of the external thread column (6) close to the blocking block (3), and a plurality of flow holes (601) connected to the disassembly hole (602) are formed on the side wall of the external thread column (6) close to one end of the blocking block (3).

7. The magnetorheological damper easy to maintain according to claim 4, characterized in that: The extrusion component comprises an external thread column (6), the external thread column (6) is threadedly connected to the inner wall of the drainage hole (202), the end of the external thread column (6) is abutted against the adjacent blocking block (3), a disassembly hole (602) is penetrated through the side of the external thread column (6) close to the blocking block (3), and a plurality of flow holes (601) connected to the disassembly hole (602) are formed on the side wall of the external thread column (6) close to one end of the blocking block (3).

8. The magnetorheological damper easy to maintain according to claim 6, characterized in that: The disassembly hole (602) is a hexagonal hole.

9. The magnetorheological damper easy to maintain according to claim 7, characterized in that: The disassembly hole (602) is a hexagonal hole.

Images