An ultrasonic vacuum oil injection system for a hydraulic solenoid valve for an automobile and a control method thereof

Abstract

An ultrasonic vacuum oil injection system for a hydraulic electromagnetic valve for an automobile and a control method thereof relate to the technical field of hydraulic element testing. The system comprises a rack, an oil tank, an opening and closing cover mechanism, an oil injection assembly, a vacuum pumping assembly, an ultrasonic vibration assembly and a controller, which are arranged on the rack. The oil tank is used for containing oil and placing the hydraulic electromagnetic valve for the automobile. The opening and closing cover mechanism is used for sealing or opening the oil tank. The oil injection assembly is used for injecting oil into the oil tank. The vacuum pumping assembly is used for performing vacuum pumping on the inside of the sealed oil tank. The ultrasonic vibration assembly is used for generating ultrasonic vibration of the oil in the oil tank during the vacuum pumping. Through the cooperation of the ultrasonic vibration assembly and the vacuum pumping assembly, the cavitation effect of ultrasonic waves is combined with the vacuum negative pressure environment, so that the residual bubbles in the closed small cavity inside the electromagnetic valve can be effectively stripped and discharged, and the problem that the test data fluctuates and the product quality is uncontrollable due to the residual bubbles in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of hydraulic component testing technology, specifically to an ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves and its control method. Background Technology

[0002] With the rapid development of the automotive industry, the application of automotive hydraulic solenoid valves is becoming increasingly widespread. During the production process of automotive hydraulic solenoid valves, it is necessary to test the coil current and flow characteristics. However, because the solenoid valve contains multiple sealed small cavities, residual air bubbles within these cavities can cause fluctuations in the test data, severely affecting the accuracy and stability of the test results. Existing technologies typically employ two methods: one is direct testing after assembly, but this results in data distortion due to air bubble interference, compromising product quality; the other is manually placing the product into a sealed container for vacuum treatment before testing, which is not only cumbersome and inefficient but also makes it difficult to ensure process consistency. Summary of the Invention

[0003] In view of the above, the purpose of this application is to provide an ultrasonic vacuum oil injection system for a hydraulic solenoid valve in automobiles and its control method, so as to solve at least one of the above technical problems.

[0004] In a first aspect, this application provides an ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves, including a frame and an oil tank, an opening and closing cover mechanism, an oil injection assembly, a vacuuming assembly, an ultrasonic vibration assembly, and a controller mounted on the frame. The oil tank is used to hold oil and house the automotive hydraulic solenoid valve. The opening and closing cover mechanism is used to seal or open the oil tank. The oil injection assembly includes an oil injection pump and an oil injection pipeline, the oil injection pump being connected to the oil tank via the oil injection pipeline for injecting oil into the oil tank. The vacuuming assembly includes a vacuum pump and a vacuuming pipeline, the vacuuming pipeline being connected to the vacuum pump and the oil tank for performing vacuuming operations inside the sealed oil tank. The ultrasonic vibration assembly includes an ultrasonic vibration generator, the ultrasonic vibration generator being used to generate ultrasonic vibrations in the oil tank during the vacuuming process. The controller is electrically connected to the opening and closing cover mechanism, the oil injection assembly, the vacuuming assembly, and the ultrasonic vibration assembly respectively, for controlling their coordinated operation.

[0005] In conjunction with the first aspect, in some optional embodiments, the number of oil tanks is at least two, and the oil injection assembly and the vacuuming assembly are respectively connected to each oil tank through pipelines and switching valves.

[0006] In conjunction with the first aspect, in some optional embodiments, a liquid level sensor is provided in the oil tank to detect the liquid level height in the oil tank and to provide control signals for starting and stopping the oil injection assembly.

[0007] In conjunction with the first aspect, in some optional embodiments, the oil tank is provided with a material tray and a positioning pin that positions and cooperates with the material tray. The material tray is used to carry the automotive hydraulic solenoid valve, and the material tray is provided with a limiting groove for positioning the automotive hydraulic solenoid valve and a positioning hole for cooperating with the positioning pin.

[0008] In conjunction with the first aspect, in some alternative embodiments, a negative pressure gauge is provided on the vacuum line. The negative pressure gauge is used to detect the negative pressure value in the vacuum line and to provide control signals for starting and stopping the vacuum pump.

[0009] In conjunction with the first aspect, in some optional embodiments, the oil injection assembly further includes a hydraulic station, a return oil pump, and a return oil pipeline; the hydraulic station includes an oil reservoir; the return oil pump connects the oil tank and the oil reservoir through the return oil pipeline, and is used to pump the oil in the oil tank back to the oil reservoir after the oil injection and vacuuming operations are completed.

[0010] In conjunction with the first aspect, in some optional embodiments, the opening and closing mechanism includes a translation mechanism, a lifting mechanism, and a sealing cover; the translation mechanism is connected to the lifting mechanism and is used to drive the lifting mechanism and the sealing cover to translate above the oil tank; the lifting mechanism is connected to the sealing cover and is used to drive the sealing cover to perform lifting and lowering movements to achieve sealing or opening of the oil tank.

[0011] In conjunction with the first aspect, some optional embodiments also include a pressure relief assembly mounted on the frame. The pressure relief assembly includes a pressure relief solenoid valve and a pressure relief pipeline. The pressure relief solenoid valve is connected to the oil tank through the pressure relief pipeline and is used to relieve pressure in the oil tank after the vacuuming operation is completed.

[0012] In conjunction with the first aspect, some optional embodiments also include a robotic gripping mechanism and a barcode scanner. The robotic gripping mechanism is used to grip the automotive hydraulic solenoid valve and transfer it to the barcode scanner for barcode scanning and identification, and to place the barcode-scanned automotive hydraulic solenoid valve into a designated position in the oil tank in sequence, and to remove the oil-filled automotive hydraulic solenoid valve from the oil tank.

[0013] Secondly, this application provides a control method for an ultrasonic vacuum oil injection system for an automotive hydraulic solenoid valve in any embodiment of the first aspect described above, comprising: placing the automotive hydraulic solenoid valve to be injected into an oil tank; controlling a cover opening and closing mechanism to seal the oil tank; controlling an oil injection component to start injecting oil into the oil tank, and controlling the oil injection component to stop when a preset oil injection condition is reached; controlling a vacuum pumping component to evacuate the sealed oil tank, and controlling an ultrasonic vibration component to start during the vacuum pumping process; starting a timer when a preset vacuum level is reached and maintaining the vacuum environment and ultrasonic vibration in the oil tank for a preset working time, and controlling the vacuum pumping component and ultrasonic vibration component to stop working after the preset working time is reached; depressurizing the oil tank; controlling the cover opening and closing mechanism to open the oil tank and drain the oil in the oil tank; and removing the injected automotive hydraulic solenoid valve from the oil tank.

[0014] Based on the above technical solution, the ultrasonic vacuum oil injection system and control method for automotive hydraulic solenoid valves provided in this application, by setting up an ultrasonic vibration component and a vacuuming component to work together, utilizes the cavitation effect of ultrasound combined with a vacuum negative pressure environment to effectively remove and expel residual air bubbles in the sealed small cavity inside the solenoid valve, completely solving the problem of test data fluctuations and uncontrollable product quality caused by residual air bubbles in the prior art. Simultaneously, the system integrates an opening and closing mechanism, an oil injection component, and a controller, realizing fully automated control of the entire process from sealing, oil injection, vacuum defoaming to pressure relief and oil discharge, replacing the cumbersome traditional manual vacuuming operation, significantly improving production efficiency, and ensuring the consistency and stability of the process. This solution has a reasonable structural layout, effectively improving product quality and production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an ultrasonic vacuum oil injection system for a hydraulic solenoid valve used in automobiles, provided as an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the structure of an oil tank provided in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of a material tray provided in an embodiment of this application.

[0019] Figure 4This is a schematic diagram of an opening and closing cover mechanism provided in an embodiment of this application.

[0020] Figure 5 This is a flowchart illustrating a control method for an ultrasonic vacuum oil injection system for an automotive hydraulic solenoid valve, provided in an embodiment of this application.

[0021] Reference numerals: 1. Automotive hydraulic solenoid valve; 100. Automotive hydraulic solenoid valve ultrasonic vacuum oil injection system; 10. Frame; 20. Oil tank; 21. Material tray; 211. Limit groove; 22. Positioning pin; 23. Sealing ring; 24. Oil return port; 25. High level sensor; 26. Low level sensor; 27. Vacuum port; 28. Vacuum breaking port; 30. Opening and closing cover mechanism; 31. Translation mechanism; 311. Linear guide rail; 312. Translation mounting plate; 313. Flat... 314. Air displacement cylinder; 315. Limit stop; 316. Tank chain; 317. Tank chain bracket; 32. Lifting mechanism; 321. Base; 322. Lifting cylinder; 323. Swing arm; 324. Lifting adapter; 33. Sealing cover; 331. Guide shaft; 40. Oil injection assembly; 41. Oil injection pump; 42. Hydraulic station; 43. Return oil pump; 50. Vacuum pump assembly; 51. Vacuum pump; 60. Ultrasonic vibration assembly; 61. Ultrasonic vibration generator; 70. Barcode scanner. Detailed Implementation

[0022] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, and not all, of the embodiments of this application. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "setup," "installation," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The terms “first,” “second,” “third,” etc., are used only to distinguish elements with similar properties, and do not indicate or imply relative importance or a specific order, unless otherwise explicitly stated or limited.

[0026] The terms “comprising,” “including,” “having,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0027] The term "multiple" means two or more (including two).

[0028] The term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] The terms "an embodiment," "as an example," and "in one implementation" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.

[0030] Please see Figures 1 to 5 This application provides an ultrasonic vacuum oil injection system 100 for automotive hydraulic solenoid valves and its control method, aiming to solve the problems of fluctuations in test data, low efficiency of manual vacuuming, and uncontrollable quality of existing automotive hydraulic solenoid valves 1 due to residual air bubbles in the internal sealed cavity before testing.

[0031] like Figure 1 As shown, the ultrasonic vacuum oil injection system 100 for automotive hydraulic solenoid valves mainly includes a frame 10 and an oil tank 20, a cover opening and closing mechanism 30, an oil injection assembly 40, a vacuum assembly 50, an ultrasonic vibration assembly 60, a pressure relief assembly, a robot gripping mechanism, a barcode scanner 70, and a controller, all mounted on the frame 10.

[0032] The frame 10 serves as the main support for the entire system, housing various functional components. The oil tank 20 holds the oil and places the automotive hydraulic solenoid valve 1 to be filled. The cover opening / closing mechanism 30 seals or opens the oil tank 20. The oil filling assembly 40 injects oil into the oil tank 20. The vacuum assembly 50 evacuates the sealed oil tank 20. The ultrasonic vibration assembly 60 generates ultrasonic vibrations in the oil within the oil tank 20 during the vacuuming process. The pressure relief assembly releases pressure from the oil tank 20 after the vacuuming process is complete. The robot gripping mechanism automatically handles the automotive hydraulic solenoid valve 1. The barcode scanner 70 scans and identifies the product, and the controller is electrically connected to each of the aforementioned mechanisms and components to control their coordinated operation.

[0033] In this embodiment, the controller is preferably a PLC controller, which has the characteristics of high stability and flexible programming, and can accurately control the timing of the actions of each actuator.

[0034] The specific structure of each part will be explained in detail below.

[0035] like Figure 2 As shown, the oil tank 20 is located on the top of the frame 10. The oil tank 20 serves as the core container, and its interior contains a material tray 21 and a positioning pin 22 that positions and engages with the material tray 21. Figure 3 As shown, the tray 21 is used to carry the automotive hydraulic solenoid valve 1. The tray 21 is provided with a limiting groove 211 for positioning the automotive hydraulic solenoid valve 1 and a positioning hole that cooperates with the positioning pin 22. The cooperation between the positioning hole and the positioning pin 22 ensures the positional accuracy of the tray 21 in the oil tank 20, providing a basic guarantee for the robot gripping mechanism to achieve fully automated loading and unloading.

[0036] To improve production efficiency and solve the problem of cycle interruption caused by long vacuuming time when operating a single oil tank 20, the number of oil tanks 20 is preferably at least two. Figure 1The diagram shows two oil tanks 20. The oil injection assembly 40 and the vacuum pump assembly 50 are connected to each oil tank 20 via pipelines and switching valves. Due to the high cost of oil pumps and vacuum pumps 51, this embodiment uses multi-position multi-way solenoid valves or pneumatic ball valves for pipeline switching as the number of oil tanks 20 increases. Under the control of the PLC program, different solenoid valves operate according to preset logic, achieving the effect of one oil injection pump 41 injecting oil into multiple oil tanks 20 and one vacuum pump 51 evacuating multiple oil tanks 20. This design not only saves on the cost of expensive pump equipment but also ensures that while one oil tank 20 is undergoing prolonged vacuuming operations, the other oil tank 20 can simultaneously perform loading / unloading or oil injection operations, thus achieving continuous production.

[0037] like Figure 4 As shown, the opening and closing cover mechanism 30 is located on the top of the frame 10, specifically including a translation mechanism 31, a lifting mechanism 32, and a sealing cover 33. The translation mechanism 31 is connected to the lifting mechanism 32 and is used to move the lifting mechanism 32 and the sealing cover 33 to the top of the oil tank 20. The lifting mechanism 32 is connected to the sealing cover 33 and is used to drive the sealing cover 33 to move up and down, thereby sealing or opening the oil tank 20. This combined translation and lifting motion design effectively avoids possible interference with the top of the oil tank 20 when opening the cover, ensuring the reliability of the seal.

[0038] In this embodiment, the translation mechanism 31 includes linear guide rails 311, a translation mounting plate 312, and a translation cylinder 313. Two linear guide rails 311 are arranged in parallel. The translation mounting plate 312 is mounted on the sliders of the two linear guide rails 311. The piston rod end of the translation cylinder 313 is connected to the translation mounting plate 312, driving the translation mounting plate 312 to perform horizontal reciprocating motion along the linear guide rails 311, thereby causing the lifting mechanism 32 and the sealing cover 33 to move directly above or out of the oil tank 20 area. The lowering mechanism 32 is mounted on the translational mounting plate 312 and includes a base 321, a lifting cylinder 322, a swing arm 323, and a lifting adapter 324. The base 321 is fixed to the translational mounting plate 312, the cylinder body of the lifting cylinder 322 is fixed to the base 321, the piston rod end of the lifting cylinder 322 is rotatably connected to one end of the swing arm 323, the middle part of the swing arm 323 is rotatably connected to the base 321, and the other end of the swing arm 323 is rotatably connected to the lifting adapter 324, which is connected to the sealing cover 33. When the lifting cylinder 322 is activated, its piston rod drives the swing arm 323 to rotate around the connection point on the base 321, thereby driving the lifting adapter 324 to move the sealing cover 33 vertically. This linkage transmission structure is compact and stable, and can provide sufficient downward pressure to the sealing cover 33.

[0039] The linear guide rail 311 is equipped with limit switches and / or limit stops 314 at both ends to limit the movement of the translation mounting plate 312. The limit switches are used to detect the extreme position of the translation mounting plate 312 and send a signal to the controller to prevent the translation cylinder 313 from overshooting and causing equipment collision. The limit stops 314 are used to physically block the translation mounting plate 312 when the stroke of the translation cylinder 313 exceeds the limit, so as to play a role in rigid stopping and safety collision prevention.

[0040] A guide shaft 331 is vertically provided on the sealing cover 33. The guide shaft 331 is guided and engaged with the guide sleeve installed on the translation mounting plate 312. It is used to guide and prevent rotation when the lifting cylinder 322 drives the sealing cover 33 to move up and down, so as to ensure that the sealing cover 33 is pressed vertically and stably against the oil groove 20.

[0041] The translation mechanism 31 also includes a tank chain 315 and a tank chain support 316. The tank chain support 316 is fixed to the frame 10. The two ends of the tank chain 315 are respectively connected to the tank chain support 316 and the translation mounting plate 312. The tank chain 315 can accommodate the air pipes of the translation cylinder 313, the air pipes of the lifting cylinder 322, and the cables of the limit switches. When the translation mounting plate 312 performs horizontal reciprocating motion, the tank chain 315 extends or bends accordingly, providing traction and protection for the internal pipelines, effectively preventing the pipelines from tangling, wearing, or breaking, and improving the safety and reliability of equipment operation.

[0042] In addition, such as Figure 2 As shown, the oil tank 20 has an annular sealing groove at its opening, and a sealing ring 23 is installed inside the annular sealing groove. When the lifting mechanism 32 drives the sealing cover 33 to descend and press the oil tank 20, the sealing ring 23 is compressed and undergoes elastic deformation, forming a good seal between the sealing cover 33 and the oil tank 20.

[0043] The oil injection assembly 40 specifically includes an oil injection pump 41, an oil injection pipeline, and a hydraulic station 42. The hydraulic station 42 is located at the lower part of the frame 10 and includes an oil reservoir. An oil return port 24 is located at the center of the bottom of the oil tank 20. The oil injection pump 41 connects the oil reservoir and the oil return port 24 via the oil injection pipeline to inject oil into the oil tank 20. The oil return port 24 is located at the center of the bottom, allowing the injected oil to rise smoothly from bottom to top, effectively reducing air bubbles generated by impact. It also facilitates complete oil discharge during return, preventing residue. To achieve oil recycling, the oil injection assembly 40 also includes a return pump 43 and a return pipeline. The return pump 43 connects the oil reservoir and the oil return port 24 via the return pipeline. After the oil injection and vacuuming operations are completed, the return pump 43 starts, drawing the oil in the oil tank 20 back to the oil reservoir.

[0044] To precisely control the amount of oil injected, such as Figure 2As shown, a liquid level sensor is installed inside the oil tank 20. The liquid level sensor is used to detect the liquid level height inside the oil tank 20 and to provide control signals for the start and stop of the oil injection assembly 40. When the liquid level reaches the high level, the controller controls the oil injection pump 41 to stop to prevent oil overflow. In this embodiment, the liquid level sensor includes a low liquid level sensor 26 and a high liquid level sensor 25, which are arranged vertically at intervals on the inner wall of the oil tank 20. The high level sensor 25 is located at the top of the oil tank 20 and is used to limit the termination level of the oil injection operation. When the oil level rises to the point of touching the high level sensor 25, a signal is sent to the controller to stop the oil injection pump 41, ensuring that the oil completely submerges the product and preventing overflow. The low level sensor 26 is located at the bottom of the oil tank 20 and is used to limit the termination level of the oil return operation. When the oil level drops below the low level sensor 26 during the oil return process, a signal is sent to the controller to stop the oil return pump 43, preventing the oil return pump 43 from being damaged due to dry running, and ensuring that the oil in the oil tank 20 is basically emptied, which facilitates subsequent opening of the cover and material removal.

[0045] The vacuum assembly 50 specifically includes a vacuum pump 51 and a vacuum pipeline. A vacuum port 27 is provided on the inner wall of the oil tank 20. One end of the vacuum pipeline is connected to the vacuum pump 51, and the other end is connected to the vacuum port 27, used for vacuuming the sealed interior of the oil tank 20. To ensure effective vacuuming and prevent oil from being drawn into the vacuum pipeline, the vacuum port 27 is located at the upper part of the inner wall of the oil tank 20, above the highest liquid level. To precisely control the vacuum level, a negative pressure gauge is installed on the vacuum pipeline. The negative pressure gauge detects the negative pressure value within the vacuum pipeline and provides control signals for starting and stopping the vacuum pump 51. When the set negative pressure is reached, the vacuum pump 51 stops or enters a pressure-holding state; when the negative pressure falls below the set value, the vacuum pump 51 restarts to ensure a high vacuum environment is maintained within the oil tank 20. In addition, an oil mist separator or filter is also provided on the vacuum pipeline to filter oil mist and protect the vacuum pump 51.

[0046] The ultrasonic vibration assembly 60 includes an ultrasonic vibration generator 61, such as an ultrasonic vibrator, used to generate ultrasonic vibrations in the oil within the oil tank 20 during vacuuming. Because the automotive hydraulic solenoid valve 1 contains many small, sealed cavities, simple vacuuming is insufficient to completely remove the tiny air bubbles adhering to the cavity walls. Introducing ultrasonic vibration utilizes the cavitation effect and mechanical vibration of ultrasound to reduce the size of the bubbles and accelerate their escape from the wall surface. Combined with the vacuum environment, this completely eliminates the influence of air bubbles on subsequent test data. In this embodiment, an ultrasonic vibration generator 61 is provided on each of the two inner walls of the oil tank 20.

[0047] The pressure relief assembly specifically includes a pressure relief solenoid valve and a pressure relief pipeline. A vacuum breaking port 28 is also provided on the inner wall of the oil tank 20. The pressure relief solenoid valve is connected to this vacuum breaking port 28 via the pressure relief pipeline, and is used to relieve pressure in the oil tank 20 after the vacuuming operation is completed, so that the opening and closing mechanism 30 can smoothly open the sealing cover 33. The vacuum breaking port 28 is also located at a high position on the inner wall of the oil tank 20 to ensure that the air introduced during pressure relief will not disturb the oil surface and cause splashing.

[0048] The robotic gripping mechanism is used to grasp automotive hydraulic solenoid valves 1 and transfer them to the barcode scanner 70 for scanning and identification. After scanning, the automotive hydraulic solenoid valves 1 are sequentially placed into designated positions within the oil tank 20. The mechanism also removes the filled automotive hydraulic solenoid valves 1 from the oil tank 20 for transfer to other locations, such as a testing station. The barcode scanner 70 binds product information to oiling process parameters, facilitating closed-loop control with upstream assembly and downstream packaging, ensuring product quality and data traceability.

[0049] Based on the above system, such as Figure 5 As shown, the specific flow of the control method of this system is as follows: S1. Place the automotive hydraulic solenoid valve 1 to be filled with oil into the oil tank 20.

[0050] Specifically, the robot gripping mechanism picks up the assembled automotive hydraulic solenoid valve 1 and moves it to the barcode scanner 70 for scanning and binding, recording product information. Subsequently, the robot sequentially places the products into designated positions on the material trays 21 within the oil tank 20. Once a material tray 21 is full, the system automatically proceeds to the next step.

[0051] S2. Control the opening and closing cover mechanism 30 to seal the oil tank 20.

[0052] Specifically, the controller controls the opening and closing cover mechanism 30 to move. The translation mechanism 31 first drives the lifting mechanism 32 and the sealing cover 33 to move directly above the oil tank 20. Then, the lifting mechanism 32 drives the sealing cover 33 to descend and press it against the opening of the oil tank 20 to seal the oil tank 20.

[0053] S3. Control the oil injection component 40 to start injecting oil into the oil tank 20. When the preset oil injection conditions are met, control the oil injection component 40 to stop.

[0054] Specifically, the controller starts the oil injection pump 41, injecting oil into the sealed oil tank 20 through the injection pipeline. A level sensor in the oil tank 20 monitors the oil level in real time. When the oil reaches the high level sensor 25, the controller receives a signal and stops the oil injection pump 41.

[0055] S4. Control the vacuum pumping component 50 to evacuate the sealed oil tank 20, and control the ultrasonic vibration component 60 to start during the vacuum pumping process.

[0056] Specifically, after the oil filling is stopped, an ultrasonic vacuum oil filling operation is performed. The ultrasonic vibration generator 61 is started to vibrate, and at the same time the vacuum pump 51 is started to evacuate the sealed oil tank 20 through the vacuum pipeline.

[0057] S5. When the preset vacuum level is reached, start timing and maintain the vacuum environment and ultrasonic vibration in the oil tank 20 for the preset working time. After the preset working time is reached, control the vacuum pumping component 50 and the ultrasonic vibration component 60 to stop working.

[0058] Specifically, during the vacuuming process, the negative pressure gauge in the vacuuming pipeline monitors the negative pressure value in real time. When the set negative pressure is reached, the vacuum pump 51 stops running and enters a pressure-holding state; if the negative pressure is lower than the set value, the vacuum pump 51 restarts to maintain the vacuum environment in the oil tank 20. The ultrasonic vibration works synergistically with the vacuum environment, utilizing the defoaming function of ultrasound to accelerate the rupture and escape of air bubbles in the sealed small cavity inside the automotive hydraulic solenoid valve 1. This process continues for a set period of time, which is the preset working time, to ensure that the air bubbles are completely eliminated. When the preset working time is reached, the controller sends a command to stop the vacuum pump 51 and the ultrasonic vibration generator 61, ending the vacuum defoaming operation and preparing for subsequent pressure relief.

[0059] S6. Depressurize the oil tank 20.

[0060] Specifically, the controller controls the pressure relief solenoid valve to open, and outside air enters the oil tank 20 through the pressure relief pipeline to relieve pressure inside the oil tank 20 and balance the pressure inside and outside the oil tank 20.

[0061] S7. Control the opening and closing cover mechanism 30 to open the oil tank 20 and drain the oil in the oil tank 20.

[0062] Specifically, the controller controls the opening and closing cover mechanism 30 to operate, the lifting mechanism 32 lifts the sealing cover 33 to open the oil tank 20, and the translation mechanism 31 drives the lifting mechanism 32 to move away. Next, the controller starts the return oil pump 43 to pump the oil in the oil tank 20 back to the oil storage tank through the return oil pipeline. When the liquid level in the oil tank 20 drops to the preset value triggered by the low liquid level sensor 26, the return oil pump 43 is stopped to prepare for material removal.

[0063] S8. Remove the hydraulic solenoid valve 1 for automobiles from the oil tank 20 after oil filling.

[0064] After the robotic gripper picks up the oil-filled automotive hydraulic solenoid valve 1, it must be promptly placed at the testing station for subsequent current and flow characteristic tests to prevent air bubbles from re-entering the valve. Since the air bubbles have been eliminated, the test data will be more accurate and stable.

[0065] In the dual oil tank 20 configuration, when one oil tank 20 is performing ultrasonic vacuum oil injection, which is time-consuming, the controller can control the other oil tank 20 to simultaneously perform feeding, sealing, oil injection or oil return, and unloading operations. By switching valves to control the on / off of the corresponding pipelines, the oil injection pump 41 and vacuum pump 51 can be used in a time-sharing manner. This alternating operation mode greatly shortens the average production cycle time of a single product and improves the overall production efficiency of the line.

[0066] In summary, the ultrasonic vacuum oil injection system and control method for automotive hydraulic solenoid valves provided in this application, by setting up an ultrasonic vibration component and a vacuuming component to work in concert, utilizes the cavitation effect of ultrasound combined with a vacuum negative pressure environment to effectively remove and expel residual air bubbles from the sealed small cavity inside the solenoid valve. This completely solves the problem of test data fluctuations and uncontrollable product quality caused by residual air bubbles in existing technologies. Simultaneously, the system integrates an opening and closing mechanism, an oil injection component, and a controller, achieving fully automated control of the entire process from sealing, oil injection, vacuum defoaming to pressure relief and oil discharge. This replaces the cumbersome traditional manual vacuuming operation, significantly improving production efficiency and ensuring the consistency and stability of the process. The solution has a reasonable structural layout, effectively improving product quality and production efficiency.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application.

Claims

1. An ultrasonic vacuum oil injection system for a hydraulic solenoid valve in automobiles, characterized in that, Includes a frame and an oil tank, a cover opening and closing mechanism, an oil injection assembly, a vacuum assembly, an ultrasonic vibration assembly, and a controller mounted on the frame; The oil tank is used to hold oil and to house automotive hydraulic solenoid valves. The opening and closing cover mechanism is used to seal or open the oil tank; The oil injection assembly includes an oil injection pump and an oil injection pipeline. The oil injection pump is connected to the oil tank through the oil injection pipeline and is used to inject oil into the oil tank. The vacuum assembly includes a vacuum pump and a vacuum pipeline. The vacuum pipeline connects the vacuum pump to the oil tank and is used to perform vacuuming operations inside the sealed oil tank. The ultrasonic vibration assembly includes an ultrasonic vibration generator, which is used to generate ultrasonic vibrations in the oil tank during the vacuuming process. The controller is electrically connected to the opening and closing cover mechanism, the oil injection assembly, the vacuuming assembly, and the ultrasonic vibration assembly, respectively, and is used to control their coordinated operation.

2. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, The number of oil tanks is at least two, and the oil injection assembly and the vacuuming assembly are respectively connected to each of the oil tanks through pipelines and switching valves.

3. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, The oil tank is equipped with a liquid level sensor, which is used to detect the liquid level in the oil tank and provide control signals for starting and stopping the oil injection assembly.

4. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, The oil tank is provided with a material tray and a positioning pin that positions and cooperates with the material tray. The material tray is used to support the automotive hydraulic solenoid valve. The material tray is provided with a limiting groove for positioning the automotive hydraulic solenoid valve and a positioning hole for cooperating with the positioning pin.

5. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, A negative pressure gauge is installed on the vacuum pipeline. The negative pressure gauge is used to detect the negative pressure value in the vacuum pipeline and to provide control signals for starting and stopping the vacuum pump.

6. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, The oil injection assembly also includes a hydraulic station, a return oil pump, and a return oil pipeline; the hydraulic station includes an oil storage tank; the return oil pump connects the oil tank and the oil storage tank through the return oil pipeline, and is used to pump the oil in the oil tank back to the oil storage tank after the oil injection and vacuuming operations are completed.

7. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, The opening and closing cover mechanism includes a translation mechanism, a lifting mechanism, and a sealing cover; the translation mechanism is connected to the lifting mechanism and is used to drive the lifting mechanism and the sealing cover to translate above the oil tank; the lifting mechanism is connected to the sealing cover and is used to drive the sealing cover to perform lifting and lowering movements to achieve sealing or opening of the oil tank.

8. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, It also includes a pressure relief assembly, which is mounted on the frame. The pressure relief assembly includes a pressure relief solenoid valve and a pressure relief pipeline. The pressure relief solenoid valve is connected to the oil tank through the pressure relief pipeline and is used to relieve pressure in the oil tank after the vacuuming operation is completed.

9. The ultrasonic vacuum oil injection system for automotive hydraulic solenoid valves according to claim 1, characterized in that, It also includes a robotic gripping mechanism and a barcode scanner. The robotic gripping mechanism is used to grip the automotive hydraulic solenoid valve and move it to the barcode scanner for scanning and identification. The barcode-scanned automotive hydraulic solenoid valve is then placed in a designated position in the oil tank in sequence, and the oiled automotive hydraulic solenoid valve is then removed from the oil tank.

10. A control method for an ultrasonic vacuum oil injection system for an automotive hydraulic solenoid valve as described in any one of claims 1-9, characterized in that, include: Place the hydraulic solenoid valve of the car to be filled into the oil tank; The opening and closing mechanism controls the sealing of the oil tank; The oil injection component is controlled to start injecting oil into the oil tank, and when the preset oil injection conditions are met, the oil injection component is controlled to stop. The vacuum pumping assembly is controlled to evacuate the sealed oil tank, and the ultrasonic vibration assembly is controlled to start during the vacuum pumping process. When the preset vacuum level is reached, the timing starts and the vacuum environment and ultrasonic vibration in the oil tank are maintained for a preset working time. After the preset working time is reached, the vacuum pumping component and the ultrasonic vibration component are controlled to stop working. Depressurize the oil tank; The opening and closing mechanism is controlled to open the oil tank and drain the oil from the oil tank; Remove the hydraulic solenoid valve for automobiles from the oil tank after it has been filled with oil.

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