Magnetorheological damper packaging device and packaging method

Abstract

The present invention discloses a magnetorheological vibration damper packaging device and a packaging method thereof. The magnetorheological vibration damper includes a guide, a piston rod assembly, a floating piston and an outer cylinder, including: an upper pressure head assembly, a first sensor is provided on the top of the upper pressure head assembly; a main tooling assembly, a nitrogen injection pump, a vacuum pump and a magnetorheological fluid quantitative injection pump are connected to the upper pressure head assembly, a lower tooling assembly, a second sensor is provided on the bottom of the lower tooling assembly; a control switch; the upper pressure head assembly, the main tooling assembly and the lower tooling assembly are linked through the control switch to perform pressing, vacuuming, gas injection, liquid injection and quality inspection actions in sequence, thereby streamlining multiple processes into one process, greatly improving production efficiency, and realizing single-process automation operation through multi-tooling linkage, reducing manual intervention, improving production efficiency, and ensuring assembly accuracy through real-time monitoring by sensors.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetorheological vibration damper packaging equipment, and in particular to a magnetorheological vibration damper packaging equipment and a packaging method thereof. Background Art

[0002] The main body of the magnetorheological damper is a single-ended blind-hole metal tube. The high-pressure nitrogen and magnetorheological fluid inside are completely separated by a floating blocker, and the development end of the metal tube is sealed with a guide assembly sleeve. The high-pressure nitrogen pressure (gas volume) in the tube and the volume of the magnetorheological fluid are both measured with high precision.

[0003] The unique structure of magnetorheological fluid (MRF) shock absorbers makes assembly difficult. Existing methods often involve adding a gas nozzle to a blind hole or pre-reserving a gas filling hole. Liquid is first injected, the open hole is sealed, and then high-pressure gas is introduced to package the shock absorber body. This approach ensures controllable high-pressure nitrogen injection volume and minimizes the impact of high-pressure nitrogen on other components during packaging and manufacturing. Summary of the Invention

[0004] The object of the present invention is to provide a magnetorheological damper packaging device and a packaging method thereof with simple packaging and high packaging efficiency.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: magnetorheological vibration damper packaging equipment, the magnetorheological vibration damper includes a guide, a piston rod assembly, a floating piston and an outer cylinder, and is characterized in that it includes: an upper pressure head assembly, a first sensor is provided on the top; a main tooling assembly, a nitrogen injection pump, a vacuum exhaust pump and a magnetorheological fluid quantitative injection pump are connected to it, and a lower tooling assembly, a second sensor is provided on the bottom; a control switch; the upper pressure head assembly, the main tooling assembly and the lower tooling assembly are linked through the control switch to perform pressing, vacuuming, gas injection, liquid injection and quality inspection actions in sequence.

[0006] In one embodiment, the main tooling assembly includes a main tooling body, a nitrogen injection pump and a vacuum exhaust pump are sealedly connected to the installation cavity of the main tooling body through an air pipe, a magnetorheological fluid quantitative injection pump is sealedly connected to the installation cavity of the main tooling body through an injection pipe, the air pipe and the main tooling body are connected by a pneumatic telescopic mechanism, and the injection pipe and the main tooling body are connected by a hydraulic telescopic mechanism.

[0007] In one embodiment, the gas pipe can be telescopically connected to the main tooling body, the liquid injection pipe can be telescopically connected to the main tooling body, a nitrogen injection valve is provided between the nitrogen injection pump and the gas pipe, and a vacuum extraction valve is provided between the vacuum extraction pump and the gas pipe. Both the nitrogen injection valve and the vacuum extraction valve are solenoid valves, and automatically switch between open and closed states according to a preset program.

[0008] In one embodiment, the main tooling body is provided with a first mounting hole for inserting an air pipe and a second mounting hole for inserting a liquid pipe, an air pipe sealing ring is provided between the air pipe and the first mounting hole, a liquid pipe sealing ring is provided between the liquid injection pipe and the second mounting hole, and an outer cylinder sealing ring is provided on the inner side wall of the lower end of the mounting cavity. Both the air pipe sealing ring and the liquid pipe sealing ring are made of high-pressure resistant fluororubber material, and the outer cylinder sealing ring is a double-lip structure.

[0009] In one embodiment, the lower tooling assembly has: a stepped lifting mechanism, a limit contact surface is provided at the end of its stroke, the limit contact surface is an annular step structure, and the shape of the upper end surface of the outer cylinder is matched; a pressure closed-loop control system, which keeps the position locked when the second sensor reaches the set threshold.

[0010] In one embodiment, the upper pressure head assembly is provided with: an anti-rebound holding mechanism, which maintains the guide in the safe containment space of the main tooling during the detection stage, and the anti-rebound holding mechanism is a spring locking pin embedded in the groove of the guide side wall; an adaptive pressing head, which has a piston rod step end face profiling structure.

[0011] One embodiment of the present invention provides a method for packaging a magnetorheological damper, comprising the following steps:

[0012] S1. The floating piston is pre-installed into the installation cavity;

[0013] S2. Press the piston rod assembly to the tooling reference surface;

[0014] S3, guide sleeve is mounted on the piston rod;

[0015] S4, the outer cylinder is positioned on the lower tooling assembly;

[0016] S5. The lower tooling assembly lifts the outer cylinder to the limit surface;

[0017] S6, the upper pressing head presses down to complete the primary press-fitting positioning;

[0018] S7, establishing a first sealed cavity for vacuuming and nitrogen injection;

[0019] S8, establishing a second sealed cavity for vacuum injection of magnetorheological fluid;

[0020] S9, complete the final press-fitting and positioning of the guide;

[0021] S10, force feedback packaging quality detection;

[0022] The first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely removed from both cavities by a vacuum pump.

[0023] In one embodiment, step S7 includes:

[0024] S7.1. A first sealed chamber is formed by the floating piston, the tracheal sealing ring, and the outer cylinder sealing ring;

[0025] S7.2. The vacuum pump is used to pump the air to the set negative pressure value;

[0026] S7.3. Nitrogen injection pump injects nitrogen at set pressure;

[0027] S7.4, the trachea is retracted after insufflation;

[0028] The pressure of nitrogen is 15-20 MPa, and the injection time does not exceed 30 seconds.

[0029] In one embodiment, in step S10:

[0030] When the upper pressure head rises back, if the first sensor continuously detects a pressure value greater than 5N, it is determined that the guide is not correctly fastened.

[0031] In one embodiment, step S8 includes:

[0032] S8.1. The guide and the floating piston form a second sealed chamber;

[0033] S8.2, vacuum pump for secondary vacuuming;

[0034] S8.3, magnetorheological fluid quantitative injection pump injection in stages:

[0035] S8.3.1, first stage, fill the vacuum chamber;

[0036] S8.3.2, in the second stage, the floating piston is displaced and the fluid is injected;

[0037] During the second stage of injection, the magnetorheological fluid quantitative injection pump adjusts the injection rate in real time according to the displacement of the floating piston.

[0038] After adopting the above technical solution, the present invention has the following advantages:

[0039] 1. In this application, multiple processes are streamlined into one process, which greatly improves production efficiency. In addition, the single process is automated through the linkage of multiple tooling, which reduces manual intervention and improves production efficiency. At the same time, real-time monitoring by sensors ensures assembly accuracy. Secondly, the equipment is automated during the production process, and error prevention and processing devices are set at various important nodes in the process that are prone to deviations and problems. While reducing manual operation, it ensures product quality and prevents process safety risks. In addition, the structural scheme is highly versatile and suitable for the inflation and liquid injection assembly of all single-tube and oil-gas separation shock absorbers. During the inflation and liquid injection process, the air in the shock absorber cavity is extracted, eliminating the hidden dangers of oxidation, corrosion, chemical reaction, etc. caused by residual air to the parts in the cavity (especially the magnetic fluid variable fluid), thereby improving the reliability and stability of the shock absorber during use.

[0040] 2. The telescopic design ensures that the pipeline is separated from the tooling when not in operation to avoid contamination or blockage, and the sealed connection ensures air tightness and liquid tightness under high pressure environment.

[0041] 3. Through automated valve control, human operation errors are reduced, the precise timing of vacuuming and gas injection is ensured, and gas residue is prevented.

[0042] 4. The high-pressure resistant material and double-lip structure enhance the sealing reliability, adapt to the high-pressure environment in the shock absorber cavity, and prevent nitrogen leakage.

[0043] 5. The annular step limiter ensures the precise positioning of the outer cylinder, and the pressure closed-loop control prevents overload damage and improves assembly consistency.

[0044] 6. By setting up an anti-rebound holding mechanism, the guide is prevented from rebounding due to the action of high-pressure gas during the detection stage, ensuring the stability of the parts during the packaging process and avoiding safety hazards.

[0045] 7. Through staged vacuuming and liquid / gas injection, air residue is completely eliminated, oxidation and chemical reactions are avoided, and the life of the shock absorber is extended.

[0046] 8. Ensure precise control of nitrogen injection through parameter limitation to avoid seal failure caused by insufficient pressure or overload.

[0047] 9. Improve the objectivity of quality judgment through quantitative testing standards, reduce the risk of misjudgment, and ensure packaging reliability.

[0048] 10. Avoid liquid overflow or insufficient injection by dynamically adjusting the injection rate to ensure the accuracy of the liquid volume inside the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The present invention will be further described below in conjunction with the accompanying drawings:

[0050] Figure 1 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 1 .

[0051] Figure 2 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 2 .

[0052] Figure 3 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 3 .

[0053] Figure 4 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 4 .

[0054] Figure 5 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 5 .

[0055] Figure 6 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 6 .

[0056] Figure 7 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 7 .

[0057] Figure 8 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 8 .

[0058] Figure 9 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 9 .

[0059] Figure 10 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 10 .

[0060] Figure 11 Packaging method and process for magnetorheological damper Figure 1 .

[0061] Figure 12 Packaging method and process for magnetorheological damper Figure 2 .

[0062] Figure 13 Packaging method and process for magnetorheological damper Figure 3 .

[0063] The names of the components in the figure are as follows:

[0064] 1. Upper pressure head assembly; 11. First sensor; 2. Main tooling assembly; 20. Main tooling body; 201. Mounting cavity; 21. Nitrogen injection pump; 22. Vacuum pump; 23. Magnetorheological fluid quantitative injection pump; 24. Air pipe; 25. Liquid injection pipe; 26. Nitrogen injection valve; 27. Vacuum pump; 28. First mounting hole; 29. ​​Second mounting hole; 210. Air pipe sealing ring; 211. Liquid pipe sealing ring; 212. Outer cylinder sealing ring; 213. Limiting surface; 3. Lower tooling assembly; 31. Second sensor; 41. Guide; 411. Spring locking pin; 42. Piston rod assembly; 43. Floating piston; 44. Outer cylinder; 441. Retaining ring groove; 5. Stepped lifting mechanism; 6. Control switch. DETAILED DESCRIPTION

[0065] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0066] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0067] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In the present invention, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integration; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or interactions between two components. However, the phrase "direct connection" indicates that the two connected entities are not connected through an intermediate structure, but are connected only through a connecting structure to form a whole. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0070] like Figures 1 to 10 As shown, the present invention provides a magnetorheological vibration damper packaging device, which includes a guide 41, a piston rod assembly 42, a floating piston 43 and an outer cylinder 44. The packaging device includes an upper pressure head assembly 1, a main tooling assembly 2, a lower tooling assembly 3 and a control switch 6. A first sensor 11 is provided on the top of the upper pressure head assembly 1, the main tooling assembly 2 includes a main tooling body 20, and the main tooling body 20 is connected to a nitrogen injection pump 21, a vacuum pump 22 and a magnetorheological fluid quantitative injection pump 23. A second sensor 31 is provided on the bottom of the lower tooling assembly 3; wherein, the upper pressure head assembly 1, the main tooling assembly 2 and the lower tooling assembly 3 are linked by the control switch 6 to perform press fitting, vacuuming, gas injection, liquid injection and quality inspection actions in sequence, thereby streamlining multiple processes into one process, greatly improving efficiency. Improve production efficiency, and realize automatic operation of single process through multi-tool linkage, reduce manual intervention, improve production efficiency, and ensure assembly accuracy through real-time monitoring by sensors; secondly, the equipment is automated during the production process, and error prevention and processing devices are set at various important nodes in the process and nodes prone to deviations and problems, which ensure product quality and prevent process safety risks while reducing manual operation; in addition, the structural solution is highly versatile and suitable for the inflation and liquid injection assembly of all single-tube and oil-gas separation shock absorbers, and the air in the shock absorber cavity is extracted during the inflation and liquid injection process, eliminating the hidden dangers of oxidation, corrosion, chemical reaction and other hidden dangers of residual air on the parts in the cavity (especially magnetic fluid variable fluid), thereby improving the reliability and stability of the shock absorber during use.

[0071] In this embodiment, the main tooling body 20 has an installation cavity 201, and the nitrogen injection pump 21 and the vacuum exhaust pump 22 are sealedly connected to the installation cavity 201 of the main tooling body 20 through the air pipe 24. The magnetorheological fluid quantitative injection pump 23 is sealedly connected to the installation cavity 201 of the main tooling body 20 through the liquid injection pipe 25. The air pipe 24 and the main tooling body 20 are connected by a pneumatic telescopic mechanism, and the liquid injection pipe 25 and the main tooling body 20 are connected by a hydraulic telescopic mechanism. In this way, the telescopic design ensures that the pipeline is detached from the tooling when it is not working to avoid contamination or blockage, and the sealed connection ensures air tightness and liquid tightness under high-pressure environment.

[0072] In some embodiments, the gas pipe 24 can be telescopically connected to the main tooling body 20, the liquid injection pipe 25 can be telescopically connected to the main tooling body 20, a nitrogen injection valve 26 is provided between the nitrogen injection pump 21 and the gas pipe 24, and a vacuum extraction valve 27 is provided between the vacuum extraction pump 22 and the gas pipe 24. The nitrogen injection valve 26 and the vacuum extraction valve 27 are both solenoid valves, and automatically switch the open and closed states according to a preset program. In this way, through automated valve control, human operation errors are reduced, the precise timing of vacuum extraction and gas injection is ensured, and gas residue is prevented.

[0073] In some embodiments, the main tooling body 20 is provided with a first mounting hole 28 for inserting the air pipe 24 and a second mounting hole 29 for inserting the liquid pipe 25. An air pipe sealing ring 210 is provided between the air pipe 24 and the first mounting hole 28, and a liquid pipe sealing ring 211 is provided between the liquid injection pipe 24 and the second mounting hole 29. An outer cylinder sealing ring 212 is provided on the inner side wall of the lower end of the mounting cavity 201. The air pipe sealing ring 210 and the liquid pipe sealing ring 211 are both made of high-pressure resistant fluororubber material, and the outer cylinder sealing ring is a double-lip structure. In this way, the sealing reliability is enhanced by the high-pressure resistant material and the double-lip structure, adapting to the high-pressure environment in the shock absorber cavity and preventing nitrogen leakage.

[0074] In some embodiments, the lower tooling assembly 3 has a stepped lifting mechanism 5, and a limit surface 213 is provided at the end of its stroke. The limit surface 213 is an annular step structure provided on the inner wall of the main tooling assembly 20, which matches the shape of the upper end surface of the outer cylinder 44; and a pressure closed-loop control system, which keeps the position locked when the second sensor 31 reaches the set threshold. In this way, the annular step limit is used to ensure the accurate positioning of the outer cylinder, and the pressure closed-loop control is used to prevent overload damage, thereby improving assembly consistency.

[0075] In some embodiments, the upper pressure head assembly 1 is provided with an anti-rebound holding mechanism to maintain the guide 41 in the installation cavity 201 of the main tooling assembly 20 during the detection stage. The anti-rebound holding mechanism is a spring locking pin 411, which is embedded in the groove on the side wall of the guide 41; and an adaptive pressing head having a piston rod step end face profiling structure. In this way, by setting up an anti-rebound holding mechanism, the guide is prevented from rebounding due to the action of high-pressure gas during the detection stage, thereby ensuring the stability of the parts during the packaging process and avoiding safety hazards.

[0076] This application also discloses a magnetorheological damper packaging method, which is carried out using the magnetorheological damper packaging device. Figures 11 to 13 As shown, it includes the following steps:

[0077] S1. The floating piston is pre-installed into the installation cavity;

[0078] S2. Press the piston rod assembly to the tooling reference surface;

[0079] S3, guide sleeve is mounted on the piston rod;

[0080] S4, the outer cylinder is positioned on the lower tooling assembly;

[0081] S5. The lower tooling assembly lifts the outer cylinder to the limit surface;

[0082] S6, the upper pressing head presses down to complete the primary press-fitting positioning;

[0083] S7, establishing a first sealed cavity for vacuuming and nitrogen injection;

[0084] S8, establishing a second sealed cavity for vacuum injection of magnetorheological fluid;

[0085] S9, complete the final press-fitting and positioning of the guide;

[0086] S10, force feedback packaging quality detection;

[0087] Among them, the first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely removed from both through a vacuum pump. In this way, through staged vacuuming and liquid / gas injection, air residue is completely eliminated, oxidation and chemical reactions are avoided, and the life of the shock absorber is improved.

[0088] Next, step S7 includes:

[0089] S7.1. A first sealed chamber is formed by the floating piston, the tracheal sealing ring, and the outer cylinder sealing ring;

[0090] S7.2. The vacuum pump is used to pump the air to the set negative pressure value;

[0091] S7.3. Nitrogen injection pump injects nitrogen at set pressure;

[0092] S7.4, the trachea is retracted after insufflation;

[0093] The pressure of nitrogen is 15-20 MPa, and the injection time does not exceed 30 seconds. In this way, the precise control of nitrogen injection is ensured through parameter limitation to avoid sealing failure caused by insufficient pressure or overload.

[0094] At the same time, it can be set in step S10:

[0095] When the upper pressure head rises, if the first sensor continuously detects a pressure value greater than 5N, it is determined that the guide is not correctly fastened. This improves the objectivity of quality judgment through quantitative detection standards, reduces the risk of misjudgment, and ensures packaging reliability.

[0096] Furthermore, step S8 includes:

[0097] S8.1. The guide and the floating piston form a second sealed chamber;

[0098] S8.2, vacuum pump for secondary vacuuming;

[0099] S8.3, magnetorheological fluid quantitative injection pump injection in stages:

[0100] S8.3.1, first stage, fill the vacuum chamber;

[0101] S8.3.2, in the second stage, the floating piston is displaced and the fluid is injected;

[0102] During the second stage of injection, the magnetorheological fluid quantitative injection pump adjusts the injection rate in real time according to the displacement of the floating piston. This dynamically adjusts the injection rate to avoid liquid overflow or insufficient injection, ensuring the accuracy of the liquid volume inside the shock absorber.

[0103] In summary, the main working principles of the packaging equipment are as follows:

[0104] First, manually install the floating piston 43 into the installation cavity 201 of the main tooling assembly 2; then install the piston of the piston rod assembly 42 into the installation cavity, and push the floating piston 43 until the piston is aligned with the upper plane of the main tooling assembly 2; install the guide 41 into the maximum diameter part of the piston rod of the piston rod assembly 42; finally, install the outer cylinder 44 into the lower tooling assembly 3.

[0105] The control switch 6 is activated, and the lower tooling assembly 3 pushes the outer cylinder 44 into the lower end of the mounting cavity 201 of the main tooling assembly 2 until the upper end surface of the outer cylinder 44 contacts the limit surface of the lower end hole of the main tooling assembly 2. At the same time, the second sensor 31 works to determine the upward force of the outer cylinder 44. After reaching the set force value, the lower tooling 3 stops outputting the force value to ensure that the outer cylinder 44 maintains its current position; the upper pressure head assembly 1 presses down and presses against the piston rod step end surface of the piston rod assembly 42, pressing the piston rod assembly 42 downward; the piston rod assembly contacts the floating piston 43 and presses the floating piston 43 to the preset position;

[0106] The air delivery pipe 24 extends into the installation cavity 201 of the main tooling assembly 2. At this point, the floating piston 43, the air pipe sealing ring 26, the outer cylinder sealing ring 27, the nitrogen injection valve 21 (closed), and the vacuum exhaust valve 27 (closed) jointly enclose a sealed inner space. Once the vacuum is complete, the vacuum exhaust valve 27 closes and the nitrogen injection valve 26 opens, injecting nitrogen gas to the set pressure into the vacuum chamber.

[0107] After nitrogen injection is complete, the nitrogen injection valve 26 is closed, and the air supply pipe 24 retracts to its original position. The upper pressure head assembly 1 is pressed downward, simultaneously pressing the guide 41, piston rod assembly 42, and floating piston 43 to the set injection position. The air supply pipe 24 extends into the installation cavity 201 of the main tooling assembly 2. At this point, the floating piston 43, air pipe sealing ring 210, guide 41, nitrogen injection valve 26 (closed), and vacuum exhaust valve 27 (closed) together enclose a sealed inner space. The vacuum exhaust valve 27 is opened, and the vacuum exhaust valve 27 is used to extract air and evacuate the enclosed space.

[0108] After the vacuuming is completed, the vacuum exhaust valve 27 is closed and the air supply pipe 24 is retracted to its original position. The injection pipe 25 is extended into the installation cavity 201 of the main tooling assembly 2, and the magnetorheological fluid quantitative injection pump 23 is activated to inject a set amount of magnetorheological fluid into the vacuum cavity. After the vacuum cavity is filled, the magnetorheological fluid quantitative injection pump 23 continues to inject the fluid, and the magnetorheological fluid pushes the floating piston 43 downward until the vacuum cavity is filled with the set amount of fluid.

[0109] After the injection is completed, the injection tube 25 retracts to its original position; the upper pressure head assembly 1 presses down to push the guide 42 and the piston rod assembly 41 to the set position at the same time;

[0110] The upper ram assembly 1 safely recovers (the guide 41 does not leave the installation cavity 201 of the main tooling assembly 2 within the safety dimension), and the first sensor 11 starts working to determine whether the press-fitting is qualified (if the guide 41 and piston rod assembly 42 recover with the upper ram assembly 1 and continue to transmit force to the first sensor 11, it indicates that the guide 41 is not fastened in the retaining ring groove 441 of the outer cylinder 44, the packaging is unqualified, and the equipment alarm is issued);

[0111] After the first sensor 11 determines that the package is qualified, the upper pressure head assembly 1 returns to its original position and the lower tooling assembly 3 descends to its original position; the product is taken out and the operation is completed.

[0112] In addition to the preferred embodiments described above, the technical solutions protected by the present invention are not limited to the aforementioned embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of the present invention. Although the present invention has been described in detail above using general descriptions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on the present invention. Therefore, such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. Magnetorheological damper packaging equipment, the magnetorheological damper includes a guide, a piston rod assembly, a floating piston and an outer cylinder, characterized in that: include: The upper pressure head assembly has a first sensor on its top; the main tooling assembly is connected to a nitrogen injection pump, a vacuum pump, and a magnetorheological fluid quantitative injection pump; the lower tooling assembly has a second sensor on its bottom; a control switch; the main tooling body has a mounting cavity for pre-installing a floating piston; The upper press head assembly, main tooling assembly and lower tooling assembly are linked through the control switch to sequentially perform press fitting, vacuuming, gas injection, liquid injection and quality inspection actions; The main tooling body is provided with a first mounting hole for inserting an air pipe and a second mounting hole for inserting a liquid pipe. An air pipe sealing ring is provided between the air pipe and the first mounting hole, and a liquid pipe sealing ring is provided between the liquid injection pipe and the second mounting hole. An outer cylinder sealing ring is provided on the inner side wall of the lower end of the mounting cavity. Both the air pipe sealing ring and the liquid pipe sealing ring are made of high-pressure resistant fluororubber. The outer cylinder sealing ring is a double-lip structure. A first sealing cavity is formed by the floating piston, the air pipe sealing ring and the outer cylinder sealing ring. A second sealing cavity is formed based on the guide and the floating piston. The first sealing cavity and the second sealing cavity are formed in sequence. The upper press head assembly is provided with: an anti-rebound holding mechanism, which maintains the guide in the installation cavity of the main tooling assembly during the detection phase; the anti-rebound holding mechanism is a spring locking pin embedded in the groove of the side wall of the guide; an adaptive press head, which has a piston rod step end face profiling structure; The lower tooling assembly comprises: a stepped lifting mechanism with a limit surface at the end of its travel, the limit surface being an annular step structure provided on the inner side wall of the main tooling assembly and matching the shape of the upper end face of the outer cylinder; a pressure closed-loop control system, which maintains the position locked when the second sensor reaches a set threshold; A vacuum pump valve is provided between the vacuum pump and the gas pipe; The main tooling assembly includes a main tooling body, a nitrogen injection pump and a vacuum pump sealedly connected to the installation cavity of the main tooling body through a gas pipe, and a magnetorheological fluid quantitative injection pump sealedly connected to the installation cavity of the main tooling body through a liquid injection pipe; After the vacuuming is completed, the vacuum exhaust valve is closed and the air supply pipe retracts to its original position; the injection pipe is extended into the installation cavity of the main tooling assembly, and the magnetorheological fluid quantitative injection pump works to inject a set amount of magnetorheological fluid into the vacuum cavity.

2. The magnetorheological damper packaging device according to claim 1, characterized in that: The air delivery pipe is connected to the main tool body through a pneumatic telescopic mechanism, and the liquid injection pipe is connected to the main tool body through a hydraulic telescopic mechanism.

3. The magnetorheological damper packaging device according to claim 2, characterized in that: The gas delivery pipe can be telescopically connected to the main tooling body, the liquid injection pipe can be telescopically connected to the main tooling body, and a nitrogen injection valve is provided between the nitrogen injection pump and the gas delivery pipe. Both the nitrogen injection valve and the vacuum exhaust valve are solenoid valves, and automatically switch the open and closed states according to a preset program.

4. A magnetorheological damper packaging method, used in the magnetorheological damper packaging device according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. The floating piston is pre-installed into the installation cavity; S2. Press the piston rod assembly to the tooling reference surface; S3, guide sleeve is mounted on the piston rod; S4, the outer cylinder is positioned on the lower tooling assembly; S5. The lower tooling assembly lifts the outer cylinder to the limit surface; S6, the upper pressing head presses down to complete the primary press-fitting positioning; S7, establishing a first sealed cavity for vacuuming and nitrogen injection; S8, establishing a second sealed cavity for vacuum injection of magnetorheological fluid; S9, complete the final press-fitting and positioning of the guide; S10, force feedback type packaging quality inspection; wherein, the first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely removed from both by a vacuum pump.

5. The magnetorheological damper packaging method according to claim 4, characterized in that: The step S7 comprises: S7.

1. A first sealed chamber is formed by the floating piston, the tracheal sealing ring, and the outer cylinder sealing ring; S7.

2. The vacuum pump is used to pump the air to the set negative pressure value; S7.

3. Nitrogen injection pump injects nitrogen at set pressure; S7.

4. After the trachea is injected with nitrogen, it is retracted. The pressure of the nitrogen is 15-20 MPa and the injection time does not exceed 30 seconds.

6. The magnetorheological damper packaging method according to claim 5, characterized in that: In step S10 , when the upper pressure head rises, if the first sensor continuously detects a pressure value greater than 5N, it is determined that the guide is not correctly fastened.

7. The magnetorheological damper packaging method according to claim 6, characterized in that: The step S8 comprises: S8.

1. The guide and the floating piston form a second sealed chamber; S8.2, vacuum pump for secondary vacuuming; S8.

3. The magnetorheological fluid quantitative injection pump injects fluid in stages: S8.3.

1. The first stage is to fill the vacuum chamber; S8.3.

2. The second stage is to push the floating piston to displace and inject fluid; wherein, during the second stage of injection, the magnetorheological fluid quantitative injection pump adjusts the injection rate in real time according to the displacement of the floating piston.

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