Magnetorheological damper packaging equipment and packaging method thereof

Abstract

The magnetorheological damper comprises a guider, a piston rod assembly, a floating piston and an outer cylinder barrel, and the magnetorheological damper packaging equipment comprises an upper pressing head assembly, a lower pressing head assembly, a lower pressing head assembly, an upper pressing head assembly and a lower pressing head assembly, a nitrogen injection pump, a vacuum air pump and a magnetorheological fluid quantitative injection pump are connected to the main tool assembly, and a second sensor is arranged at the bottom of the lower tool assembly; a control switch; the upper pressing head assembly, the main tool assembly and the lower tool assembly are linked through a control switch and sequentially execute press fitting, vacuumizing, gas injection, liquid injection and quality detection actions, multiple procedures are simplified into one procedure, the production efficiency is greatly improved, single-procedure automatic operation is achieved through multi-tool linkage, manual intervention is reduced, the production efficiency is improved, and the production cost is reduced. And meanwhile, the assembly precision is ensured through real-time monitoring of a sensor.

Description

Technical Field

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

[0002] The main body of the magnetorheological damper is a single-head 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 have high precision.

[0003] The characteristic structure of the magnetorheological fluid shock absorber makes the assembly method difficult. The existing methods mostly use the method of adding a gas nozzle at the blind hole end, or reserving a gas filling hole, first injecting liquid, closing the open end hole, and then filling the high-pressure gas to package the shock absorber body, so as to ensure the controllability of the high-pressure nitrogen filling amount and the high-pressure impact of the 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 scheme: 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 pump and a magnetorheological fluid quantitative injection pump are connected to it, and a lower tooling assembly is provided at the bottom of it. A second sensor; 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 turn.

[0006] In one of the embodiments, 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 through a pneumatic telescopic mechanism, and the injection pipe and the main tooling body are connected through a hydraulic telescopic mechanism.

[0007] In one of the embodiments, 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 exhaust valve is provided between the vacuum exhaust pump and the gas pipe. Both the nitrogen injection valve and the vacuum exhaust valve are solenoid valves, and automatically switch between open and closed states according to a preset program.

[0008] In one of the embodiments, 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 of the embodiments, 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 barrel is matched; a pressure closed-loop control system, which keeps the position locked when the second sensor reaches a set threshold.

[0010] In one of the embodiments, 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 phase, and the anti-rebound holding mechanism is a spring locking pin embedded in the groove of the side wall of the guide; an adaptive pressing head, which has a piston rod step end face profiling structure.

[0011] One embodiment of the present invention is a method for packaging a magnetorheological damper, which comprises the following steps: S1. The floating piston is pre-installed into the installation cavity; S2. Press the piston rod assembly to the tooling reference surface; S3, the guide 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 packaging quality inspection; The first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely exhausted by a vacuum pump.

[0012] In one embodiment, step S7 includes: S7.1, forming a first sealing chamber by means of a floating piston, an air pipe sealing ring and an outer cylinder sealing ring; S7.2, vacuum pump to evacuate to the set negative pressure value; S7.3, nitrogen injection pump injects nitrogen at a set pressure; S7.4, the trachea retracts after the insufflation is completed; The pressure of nitrogen is 15-20MPa, and the injection time does not exceed 30 seconds.

[0013] In one embodiment, in step S10: 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.

[0014] In one embodiment, 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, magnetorheological fluid quantitative injection pump injection in stages: S8.3.1, the first stage is to fill the vacuum chamber; S8.3.2, in the second stage, the floating piston is pushed to move and inject liquid; 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.

[0015] After adopting the above technical solution, the present invention has the following advantages: 1. In the present 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, the assembly accuracy is ensured through real-time monitoring by sensors. Secondly, the equipment is automated during the production process, and error prevention and processing devices are set at important nodes in the process and nodes prone to deviations and problems, which ensures product quality and prevents process safety risks while reducing manual operation. In addition, the structural scheme has strong versatility and is suitable for the inflation and liquid injection assembly of all single-tube and oil-gas separation shock absorbers. In addition, during the inflation and liquid injection process, the air in the shock absorber cavity is evacuated, eliminating the hidden dangers of oxidation, erosion, 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 5. The annular step limiter ensures the accurate positioning of the outer cylinder, and the pressure closed-loop control prevents overload damage and improves assembly consistency.

[0020] 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.

[0021] 7. Through staged vacuuming and liquid / gas injection, air residue can be completely eliminated to avoid oxidation and chemical reactions, thus extending the life of the shock absorber.

[0022] 8. Ensure precise control of nitrogen injection through parameter limitation to avoid sealing failure caused by insufficient pressure or overload.

[0023] 9. Improve the objectivity of quality judgment through quantitative testing standards, reduce the risk of misjudgment, and ensure packaging reliability.

[0024] 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

[0025] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 1 .

[0026] Figure 2 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 2 .

[0027] Figure 3 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 3 .

[0028] Figure 4 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 4 .

[0029] Figure 5 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 5 .

[0030] Figure 6 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 6 .

[0031] Figure 7 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 7 .

[0032] Figure 8 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 8 .

[0033] Fig. 9 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 9 .

[0034] Fig.10 Schematic diagram of the packaging process of the magnetorheological damper packaging equipment Figure 10 .

[0035] Fig.11 Packaging method flow for magnetorheological damper Figure 1 .

[0036] Fig.12 Packaging method flow for magnetorheological damper Figure 2 .

[0037] Fig.13 Packaging method flow for magnetorheological damper Figure 3 .

[0038] The names of the components in the figure are as follows: 1. Upper pressure head assembly; 11. First sensor; 2. Main tooling assembly; 20. Main tooling body; 201. Installation 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 installation hole; 29. ​​Second installation 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

[0039] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0040] 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 may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0041] 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the 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.

[0044] like Figures 1 to 10As shown, the present invention provides a magnetorheological 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, and the main tooling assembly 2 includes a main tooling body 20. A nitrogen injection pump 21, a vacuum pump 22 and a magnetorheological fluid quantitative injection pump 23 are connected to the main tooling body 20. 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 through the control switch 6 to perform press fitting, vacuuming, gas injection, liquid injection and quality inspection actions in sequence, thereby simplifying multiple processes into one process, greatly improving the efficiency. Improve production efficiency, and realize single-process automation 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 that are prone to deviations and problems, which ensures product quality and prevents process safety risks while reducing manual operation; in addition, the structural solution has strong versatility and is suitable for the inflation and injection assembly of all single-tube and oil-gas separation shock absorbers. In addition, the air in the shock absorber cavity is extracted during the inflation and injection process, eliminating the hidden dangers of oxidation, erosion, chemical reaction, etc. caused by residual air to the parts in the cavity (especially magnetic fluid variable fluid), thereby improving the reliability and stability of the shock absorber during use.

[0045] 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 sealed and 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 sealed and connected to the installation cavity 201 of the main tooling body 20 through the injection pipe 25. The air pipe 24 is connected to the main tooling body 20 through a pneumatic telescopic mechanism, and the injection pipe 25 is connected to the main tooling body 20 through a hydraulic telescopic mechanism. In this way, the telescopic design ensures that the pipeline is detached from the tooling when it is not in working state to avoid contamination or blockage, and the sealed connection ensures air tightness and liquid tightness under high-pressure environment.

[0046] 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 exhaust valve 27 is provided between the vacuum exhaust pump 22 and the gas pipe 24. Both the nitrogen injection valve 26 and the vacuum exhaust valve 27 are solenoid valves, and automatically switch the open and closed states according to a preset program. In this way, through automatic valve control, human operation errors are reduced, the precise timing of vacuum extraction and gas injection is ensured, and gas residue is prevented.

[0047] 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, a liquid pipe sealing ring 211 is provided between the liquid injection pipe 24 and the second mounting hole 29, and an outer cylinder sealing ring 212 is provided on the inner side wall of the lower end of the installation 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 to adapt to the high-pressure environment in the shock absorber cavity and prevent nitrogen leakage.

[0048] 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.

[0049] 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.

[0050] The present application also discloses a magnetorheological damper packaging method, which is performed using the magnetorheological damper packaging device as described above. Figures 11 to 13 As shown, it includes the following steps: S1. The floating piston is pre-installed into the installation cavity; S2. Press the piston rod assembly to the tooling reference surface; S3, the guide 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 packaging quality inspection; Among them, the first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely removed by 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.

[0051] Secondly, step S7 comprises: S7.1, forming a first sealing chamber by means of a floating piston, an air pipe sealing ring and an outer cylinder sealing ring; S7.2, vacuum pump to evacuate to the set negative pressure value; S7.3, nitrogen injection pump injects nitrogen at a set pressure; S7.4, the trachea retracts after the insufflation is completed; The pressure of nitrogen is 15-20MPa, 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.

[0052] At the same time, it can be set in step S10: When the upper pressure head rises back up, if the first sensor continuously detects a pressure value greater than 5N, it is determined that the guide is not correctly fastened. In this way, the objectivity of quality judgment is improved through quantitative detection standards, the risk of misjudgment is reduced, and packaging reliability is ensured.

[0053] Furthermore, step S8 includes: S8.1, the guide and the floating piston form a second sealed chamber; S8.2, vacuum pump for secondary vacuuming; S8.3, magnetorheological fluid quantitative injection pump injection in stages: S8.3.1, the first stage is to fill the vacuum chamber; S8.3.2, in the second stage, the floating piston is pushed to move and inject liquid; Among them, 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. In this way, by dynamically adjusting the injection rate, liquid overflow or insufficient injection is avoided, and the accuracy of the liquid volume inside the shock absorber is ensured.

[0054] In summary, the main working principle of the packaging equipment is as follows: 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.

[0055] Start the control switch 6, the lower tooling assembly 3 pushes the outer cylinder 44 into the lower end of the installation 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, and 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 the force value output to ensure that the outer cylinder 44 maintains the 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 to press 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; The air delivery pipe 24 extends into the installation cavity 201 of the main tooling assembly 2. At this time, 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) together seal a sealed inner space cavity. The vacuum exhaust valve 27 is opened, and the vacuum exhaust valve 27 is used to exhaust air and evacuate the enclosed space into a vacuum; after the vacuum is completed, the vacuum exhaust valve 27 is closed, and the nitrogen injection valve 26 is opened to inject nitrogen of a set pressure into the vacuum cavity; After the nitrogen injection is completed, the nitrogen injection valve 26 is closed, and the air pipe 24 is retracted to the original position; the upper pressure head assembly 1 is pressed down, and the guide 41, the piston rod assembly 42, and the floating piston 43 are pressed to the injection setting position at the same time; the air pipe 24 extends into the installation cavity 201 of the main tooling assembly 2. At this time, the floating piston 43, the air pipe sealing ring 210, the guide 41, the nitrogen injection valve 26 (closed), and the vacuum exhaust valve 27 (closed) together enclose a sealed inner space cavity. The vacuum exhaust valve 27 is opened, and the vacuum exhaust valve 27 is used to exhaust air and evacuate the enclosed space into a vacuum; After the vacuuming is completed, the vacuuming valve 27 is closed, and the air delivery pipe 24 is retracted to the 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 works 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 liquid, and the magnetorheological fluid pushes the floating piston 43 downward until the set injection amount is filled; After the injection is completed, the injection tube 25 retracts to the 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; The upper pressure head assembly 1 is safely raised (the guide 41 does not leave the safety dimension of the installation cavity 201 of the main tooling assembly 2), and the first sensor 11 starts to work to determine whether the press-fitting is qualified (if the guide 41 and the piston rod assembly 42 are raised with the upper pressure head assembly 1 and continue to transmit force to the first sensor 11, it means 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 alarms); After the first sensor 11 determines that the packaging is qualified, the upper pressure head assembly 1 returns to the original position, and the lower tooling assembly 3 descends to the original position; the product is taken out and the operation is completed.

[0056] In addition to the above preferred embodiments, the technical solutions protected by the present invention are not limited to the above embodiments. It should be pointed out that the combination of the technical solutions of any embodiment with the technical solutions of one or more other embodiments is within the protection scope of the present invention. Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A magnetorheological damper packaging device, wherein the magnetorheological damper comprises a guide, a piston rod assembly, a floating piston and an outer cylinder, and is characterized in that: include: An upper pressure head assembly, a first sensor is provided on the top of the upper pressure head assembly; The main tooling assembly is connected to a nitrogen injection pump, a vacuum pump and a magnetorheological fluid quantitative injection pump. A lower tooling assembly, the bottom of which is provided with a second sensor; 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.

2. The magnetorheological damper packaging device according to claim 1, characterized in that: 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 delivery 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 delivery pipe and the main tooling body are connected through a pneumatic telescopic mechanism, and the injection pipe and the main tooling body are connected 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, a nitrogen injection valve is provided between the nitrogen injection pump and the gas delivery pipe, and a vacuum exhaust valve is provided between the vacuum exhaust pump and the gas delivery pipe. Both the nitrogen injection valve and the vacuum exhaust valve are solenoid valves, and automatically switch between open and closed states according to a preset program.

4. The magnetorheological damper packaging device according to claim 2, characterized in that: 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.

5. The magnetorheological damper packaging device according to claim 1, characterized in that: The lower tooling assembly has: a stepped lifting mechanism, the end point of which is provided with a limit surface, the limit surface is an annular step structure provided on the inner side wall of the main tooling assembly, and matches the shape of the upper end surface of the outer cylinder; Pressure closed loop control system, maintains position lock when the second sensor reaches the set threshold.

6. The magnetorheological damper packaging device according to claim 1, characterized in that: The upper pressure 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 stage, and the anti-rebound holding mechanism is a spring locking pin embedded in the groove of the side wall of the guide; Adaptive press-fitting head with piston rod step end face profiling structure.

7. A method for packaging a magnetorheological damper, 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, the guide 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 packaging quality inspection; The first sealed cavity and the second sealed cavity are formed in sequence, and the air is completely exhausted by a vacuum pump.

8. The magnetorheological damper packaging method according to claim 7, characterized in that: The step S7 comprises: S7.1, forming a first sealing chamber by means of a floating piston, an air pipe sealing ring and an outer cylinder sealing ring; S7.2, vacuum pump to evacuate to the set negative pressure value; S7.3, nitrogen injection pump injects nitrogen at a set pressure; S7.4, the trachea retracts after the insufflation is completed; The pressure of nitrogen is 15-20MPa, and the injection time does not exceed 30 seconds.

9. The method for packaging a magnetorheological damper according to claim 7, characterized in that: In step S10: 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.

10. The method for packaging a magnetorheological damper according to claim 7, 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, magnetorheological fluid quantitative injection pump injection in stages: S8.3.1, the first stage is to fill the vacuum chamber; S8.3.2, in the second stage, the floating piston is pushed to move and inject liquid; 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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