An adjustable fluid level automotive assembly vacuum filler

Abstract

This utility model provides an adjustable liquid level vacuum filling gun for automotive assembly, relating to the field of vacuum filling gun technology. It includes a filling gun housing with a closed nozzle and a first and second sleeve inside the nozzle. The central axes of both the first and second sleeves are parallel to the central axis of the nozzle of the filling gun housing. An oil extraction tube is threadedly connected to the first sleeve via a first nut, allowing adjustment of the tube's insertion length into the cavity to accommodate different cavity depths. A level gauge is connected to the second nut of the second sleeve via a threaded sleeve, allowing flexible adjustment of the insertion depth to meet different liquid level monitoring needs. The insertion-type level gauge directly extends into the cavity, reflecting the liquid level in real time. By first adding an excess amount of oil and then extracting the excess oil using the extraction tube, precise control of the filling volume is eliminated, reducing the requirement for operators to memorize standard filling volumes for different vehicle models and simplifying operation.

Description

Technical Field

[0001] This utility model relates to the field of vacuum filling gun technology, and in particular to an adjustable liquid level vacuum filling gun for automobile assembly. Background Technology

[0002] In the automobile assembly line, the vacuum filling gun is the core component for achieving precise and efficient filling of fluids (such as brake fluid, antifreeze, refrigerant, etc.), and its performance directly affects the filling efficiency, accuracy, and overall vehicle assembly quality.

[0003] For example, a brake fluid vacuum filling gun with the prior art, publication number CN221459877U, connects to the brake fluid delivery pipe by screwing on the pipe coupling thread set in the connecting screw head. The filling gun housing and the fixed support chamber are aligned with the target cavity, and the insert-type filling tube is inserted into the target cavity. The hook slides and locks the filling port of the target filling cavity. After being fully fixed and locked, the auxiliary vacuum extraction component performs a vacuum suction operation on the inside of the cavity at the target filling point. Finally, brake fluid is added, so that the presence of air inside will not affect the operation of the entire brake fluid.

[0004] However, the control method is manual, requiring operators to observe the data on the display screen or combine it with the standard brake fluid filling amount for the vehicle model to manually close the liquid shut-off solenoid valve to stop filling. It cannot achieve automatic shutdown after the fluid level reaches the standard, resulting in insufficient ease of operation. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an adjustable liquid level vacuum filling gun for automobile assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an adjustable liquid level automotive assembly vacuum filling gun, comprising a filling gun housing, wherein the filling gun housing has a closed nozzle and a first sleeve and a second sleeve are provided inside the nozzle, the central axes of the first sleeve and the second sleeve are both arranged parallel to the central axis of the filling gun housing nozzle, one end of the first sleeve and the second sleeve is located at the closed end of the filling gun housing nozzle, and the other end extends through the inner wall of the filling gun housing and extends to the outer side of the filling gun housing, wherein the first sleeve and the second sleeve are respectively provided with an oil drain pipe and an insertion-type liquid level gauge, and a switch valve is built into the end of the oil drain pipe near the nozzle of the filling gun housing, and a sealing gasket for fitting the closed end of the filling gun housing nozzle is fixedly installed on the outer wall of the oil drain pipe.

[0007] Preferably, a first nut is rotatably connected to the other end of the first sleeve, and the first nut is threadedly connected to the outer wall of the oil drain pipe.

[0008] Preferably, a second nut is rotatably connected to the outer wall of the other end of the second sleeve, and a threaded sleeve that is threadedly connected to the second nut is fixedly installed on the surface of the insertion level gauge.

[0009] Preferably, a valve is installed at the handle of the refueling gun housing, and both ends of the valve are provided with oil inlet pipes, both of which are located inside the refueling gun housing.

[0010] Preferably, one of the oil inlet pipes is located at the closed end of the nozzle of the refueling gun housing, away from the valve, and the other oil inlet pipe extends through the refueling gun housing and to the outside of the refueling gun housing.

[0011] Preferably, a three-way valve is installed at the closed end of the nozzle of the refueling gun housing. The three valve ports of the three-way valve are located at the nozzle of the refueling gun housing, inside the refueling gun housing, and outside the refueling gun housing, respectively. Solenoid valves are installed in the three-way valve ports located inside and outside the refueling gun housing, and an air pipe for connecting an air pump is installed in the three-way valve port located outside the refueling gun housing.

[0012] Preferably, a sealing cover is fixedly installed on the outer wall of the refueling gun housing near the muzzle, and a fastening nut is rotatably connected to the outer wall of the sealing cover.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the oil extraction pipe is threadedly connected to the first sleeve via a first nut, allowing adjustment of the length of the oil extraction pipe extending into the cavity to adapt to different cavity depths. The level gauge is connected to the second nut of the second sleeve via a threaded sleeve, allowing flexible adjustment of the insertion depth to adapt to different liquid level monitoring needs. The insertion-type level gauge extends directly into the cavity to reflect the liquid level height in real time. By first adding an excess amount of oil and then using the oil extraction pipe to extract the excess oil, there is no need to precisely control the amount added, reducing the requirement for operators to remember the standard addition amounts for different vehicle models, making the operation simpler.

[0014] 2. In this utility model, by setting a switching valve, after the oil extraction is completed, the oil remaining in the oil extraction pipe can be prevented from flowing back into the cavity when the oil pump stops working or stops filling the cavity with air by using the closed valve. In addition, the oil remaining in the oil extraction pipe can also ensure that there is no air when the oil pump extracts oil again. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of an adjustable liquid level vacuum filling gun for automobile assembly is provided for this utility model. Figure 2 This invention proposes an adjustable liquid level vacuum filling gun for automotive assembly. Figure 1 A schematic diagram of the structure viewed from below; Figure 3 This invention proposes an adjustable liquid level vacuum filling gun for automotive assembly. Figure 1 A schematic diagram of the cross-sectional structure; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0016] Legend: 1. Filling gun housing; 2. Valve; 3. Oil inlet pipe; 4. Insertion level gauge; 5. Oil drain pipe; 6. Fastening nut; 7. Sealing cover; 8. Air pipe; 9. Three-way valve; 10. First nut; 11. First sleeve; 12. Second nut; 13. Second sleeve; 14. Switch valve; 15. Sealing gasket; 16. Threaded sleeve; 17. Solenoid valve. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Many specific details are set forth in the following description in order to provide 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 present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] like Figures 1-4As shown, an adjustable liquid level automotive vacuum filling gun includes a filling gun housing 1. The filling gun housing 1 has a closed nozzle, and a first sleeve 11 and a second sleeve 13 are disposed inside the nozzle. The central axes of the first sleeve 11 and the second sleeve 13 are both parallel to the central axis of the nozzle of the filling gun housing 1. One end of the first sleeve 11 and the second sleeve 13 is located at the closed end of the nozzle of the filling gun housing 1, and the other end penetrates the inner wall of the filling gun housing 1 and extends to the outside of the filling gun housing 1. The first sleeve 11 and the The second sleeve 13 is equipped with an oil drain pipe 5 and an insertion-type level gauge 4. The oil drain pipe 5 can be connected to a commonly used oil pump via a flexible hose. The oil pump is used to extract excess oil trapped in the car cavity as the internal air pressure returns to atmospheric pressure. The insertion-type oil pump allows for real-time measurement of changes in the oil level in the cavity, making it easier for personnel to determine when to stop pumping. The other end of the first sleeve 11 is rotatably connected to a first nut 10, which is connected to the oil drain pipe 5. The outer wall is threaded, and the relative position of the oil drain pipe 5 and the first sleeve 11 is fixed by the first nut 10. The outer wall of the other end of the second sleeve 13 is rotatably connected to the second nut 12. The surface of the insertion level gauge 4 is fixedly installed with a threaded sleeve 16 that is threaded to the second nut 12. The relative position of the insertion level gauge 4 and the second sleeve 13 is fixed by the second nut 12. The sealing gasket is installed on the second nut 12 to ensure a seal, which facilitates the insertion of the nozzle of the filling gun housing 1 into the cavity and the evacuation of the cavity, thus preventing air leakage. The end of the oil drain pipe 5 near the nozzle of the filling gun housing 1 has a built-in switch valve 14, and the outer wall of the oil drain pipe 5 is fixedly installed with a sealing gasket 15 for fitting the closed end of the nozzle of the filling gun housing 1. The first nut 10 fixes the position edge of the oil drain pipe 5 so that the sealing gasket 15 is kept in contact with the bottom opening of the first sleeve 11. The switch valve 14 is closed to ensure the sealing of the oil drain pipe 5, which facilitates the evacuation of the cavity.

[0020] A valve 2 is installed at the handle of the filling gun housing 1. Both ends of the valve 2 are equipped with oil inlet pipes 3. Both oil inlet pipes 3 are located inside the filling gun housing 1. One oil inlet pipe 3 is located at the closed end of the filling gun housing 1, away from the valve 2. The other oil inlet pipe 3 passes through the filling gun housing 1 and extends to the outside of the filling gun housing 1. The valve 2 is opened to facilitate the filling of the cavity with oil through the oil inlet pipe 3. Then, the internal air is discharged by vacuuming.

[0021] A three-way valve 9 is installed at the closed end of the nozzle of the refueling gun housing 1. The three ports of the three-way valve 9 are located at the nozzle of the refueling gun housing 1, inside the refueling gun housing 1, and outside the refueling gun housing 1, respectively. Solenoid valves 17 are installed in both the internal and external ports of the three-way valve 9. An air pipe 8 for connecting an air pump is installed in the external port of the three-way valve 9. In actual use, the air pipe 8 can be connected to any commonly available air pump. The refueling gun housing 1 is used with one of the commonly available vacuum pump models. After the refueling gun housing 1 is inserted into the cavity, as... Figure 3 As shown, the solenoid valve 17 at the valve port inside the filling gun housing 1 of the three-way valve 9 is opened, allowing the vacuum pump to evacuate the cavity. When excess oil needs to be removed from the cavity, the solenoid valve 17 at the valve port inside the filling gun housing 1 of the three-way valve 9 is closed, while the solenoid valve 17 at the valve port outside the filling gun housing 1 of the three-way valve 9 is opened. An air pump, in conjunction with the air pipe 8, inflates the cavity to restore normal air pressure. Continuous inflation can be selected. Under the action of air pressure, the oil in the cavity is forced to pass through the opened switch valve 14 and be discharged into the oil drain pipe 5. Alternatively, after the normal air pressure is restored in the cavity, the internal space of the cavity is evacuated through the air pipe 8 and the solenoid valve at the valve port outside the filling gun housing 1. With the dual function of valve 17 opening, it connects to the outside world, allowing the oil pump and oil pipe to extract excess oil. A sealing cover 7 is fixedly installed on the outer wall of the filling gun housing 1 near the nozzle. A fastening nut 6 is rotatably connected to the outer wall of the sealing cover 7. The fastening nut 6 is threadedly connected to the cavity opening to fix the filling gun housing 1. In addition, the function of the switch valve 14 in this scheme is that after the oil extraction is completed, the oil remaining in the oil pipe can be prevented from flowing back into the cavity when the oil pump stops working or stops filling the cavity with air by closing the through valve. The oil remaining in the oil pipe also makes it easy to ensure that there is no air when the oil pump extracts oil again.

[0022] The method of using this utility model is as follows: Preliminary preparations: Secure the filling gun housing 1 to the cavity by tightening the fastening nut 6, and ensure the sealing cover 7 seals the connection; ensure that the oil drain pipe 5 is connected to the oil pump, the air pipe 8 connected to the external valve port of the three-way valve 9 is connected to the air pump, and that the filling gun is used in conjunction with a vacuum pump.

[0023] Vacuuming and filling: Open the three-way valve 9 and the solenoid valve 17 located inside the housing to start the vacuum pump to evacuate the cavity; open the valve 2 at the handle to add excess oil into the cavity through the oil inlet pipe 3.

[0024] Oil extraction preparation: Close the solenoid valve 17 inside the three-way valve 9 housing, open the solenoid valve 17 connected to the valve port outside the filling gun housing 1, and use the air pump to fill the cavity to restore normal pressure or maintain communication with the outside.

[0025] Liquid level monitoring and oil extraction: The oil level in the cavity is observed in real time by the insertion level gauge 4; the switch valve 14 of the oil drain pipe 5 is opened, the oil pump is started or the oil is forced out by air pressure, and the excess oil is extracted through the oil drain pipe 5.

[0026] Stop and seal: When the level gauge shows that the liquid level has reached the standard height, shut off the switch valve 14 and the oil pump; the switch valve 14 can prevent the backflow of residual oil in the drain pipe 5, and at the same time ensure that there is no air in the pipeline when pumping oil next time.

[0027] The wiring diagrams for the insertion level gauge 4, the air valve, and the solenoid valve 17 in this utility model are common knowledge in the field. Their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control method and wiring layout of the insertion level gauge 4, the air valve, and the solenoid valve 17 will not be explained in detail.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An adjustable liquid level automotive assembly vacuum filling gun, comprising a filling gun housing (1), characterized in that: The nozzle of the refueling gun housing (1) is closed and a first sleeve (11) and a second sleeve (13) are provided inside the nozzle. The central axes of the first sleeve (11) and the second sleeve (13) are parallel to the central axis of the nozzle of the refueling gun housing (1). One end of the first sleeve (11) and the second sleeve (13) is located at the closed end of the nozzle of the refueling gun housing (1), and the other end penetrates the inner wall of the refueling gun housing (1) and extends to the outside of the refueling gun housing (1). An oil drain pipe (5) and an insertion level gauge (4) are respectively provided inside the first sleeve (11) and the second sleeve (13). A switch valve (14) is built into the end of the oil drain pipe (5) near the nozzle of the refueling gun housing (1), and a sealing gasket (15) for fitting the closed end of the nozzle of the refueling gun housing (1) is fixedly installed on the outer wall of the oil drain pipe (5).

2. The adjustable liquid level automotive assembly vacuum filling gun according to claim 1, characterized in that: The other end of the first sleeve (11) is rotatably connected to a first nut (10), and the first nut (10) is threadedly connected to the outer wall of the oil drain pipe (5).

3. The adjustable liquid level automotive assembly vacuum filling gun according to claim 1, characterized in that: The second sleeve (13) has a second nut (12) rotatably connected to the outer wall of the other end of the tube. The insertion level gauge (4) has a threaded sleeve (16) that is threadedly connected to the second nut (12) fixedly installed on its surface.

4. The adjustable liquid level automotive assembly vacuum filling gun according to claim 1, characterized in that: A valve (2) is installed at the handle of the filling gun housing (1). Both ends of the valve (2) are provided with oil inlet pipes (3), and both oil inlet pipes (3) are located inside the filling gun housing (1).

5. The adjustable liquid level automotive assembly vacuum filling gun according to claim 4, characterized in that: One of the oil inlet pipes (3) has its port away from the valve (2) located at the closed end of the nozzle of the filling gun housing (1), and the other oil inlet pipe (3) has its end away from the valve (2) passing through the filling gun housing (1) and extending to the outside of the filling gun housing (1).

6. The adjustable liquid level automotive assembly vacuum filling gun according to claim 1, characterized in that: A three-way valve (9) is installed at the closed end of the nozzle of the refueling gun housing (1). The three valve ports of the three-way valve (9) are located at the nozzle of the refueling gun housing (1), inside the refueling gun housing (1), and outside the refueling gun housing (1), respectively. Solenoid valves (17) are installed in the valve ports of the three-way valve (9) located inside and outside the refueling gun housing (1), and an air pipe (8) for connecting an air pump is installed in the valve port of the three-way valve (9) located outside the refueling gun housing (1).

7. The adjustable liquid level automotive assembly vacuum filling gun according to claim 1, characterized in that: A sealing cover (7) is fixedly installed on the outer wall of the filling gun housing (1) near the nozzle, and a fastening nut (6) is rotatably connected to the outer wall of the sealing cover (7).

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