Multi-station automobile oil pan sealing performance detection equipment and detection method

Abstract

The invention discloses a multi-station automobile oil pan sealing performance detection device and detection method, and relates to the field of oil pan sealing performance detection.The multi-station automobile oil pan sealing performance detection device comprises a mounting base and a detection block, the detection block is arranged above the mounting base, a detection groove is formed in the detection block, and an elastic attaching layer is fixed above the detection groove; a detection groove is formed in the oil pan, a pressing plate is arranged above the detection groove, an air supply pipe is fixed above the pressing plate, an expansion piece is connected above the pressing plate and controls vertical movement of the pressing plate, and a pressure relief mechanism is arranged above the pressing plate and exhausts gas in the oil pan outwards. According to the multi-station automobile oil pan sealing performance detection equipment, the sealing performance of the oil pan is detected through cooperation of the elastic attaching layer and the detection groove, the elastic attaching layer deforms after air leakage of the oil pan, the air leakage position can be reflected through the deformation position, water immersion is not needed, the shell is not polluted, subsequent drying is not needed, and the equipment is more energy-saving.

Description

Technical Field

[0001] The invention relates to the technical field of oil pan sealing detection, in particular to a multi-station automobile oil pan sealing detection device and a detection method. Background Art

[0002] The automobile oil pan is a protective component at the bottom of the engine oil. It plays the role of protecting the engine and collecting lubricating oil. When processing the oil pan, it needs to have good sealing performance to prevent the internal oil from oxidizing due to air leakage. The sealing performance of the oil pan can be tested by sealing testing equipment.

[0003] Prior art 1 (application number CN202420770580.1, Chinese patent published on December 6, 2024) A car engine oil pan air tightness tester, including a water tank, a fixing frame is arranged on the water tank, fixing plates are arranged on both sides of the inner side of the fixing frame, a placement plate is fixed to the bottom of the fixing plate, and a positioning plate is arranged on the inner side of the fixing plate and above the placement plate. This application overcomes the shortcomings of the prior art. By setting the positioning plate, T-slot, T-block and spring, the positioning plate is moved upward, and the T-block is moved in the T-slot and squeezes the spring, and then the two sides of the oil pan are placed on the placement plate, and then the positioning plate is released. The positioning plate is moved downward by the rebound force of the spring, and the positioning plate is contacted with the top of the oil pan, thereby positioning the oil pan. Therefore, the oil pan is positioned by the positioning plate to prevent the oil pan from moving after entering the water tank, thereby improving the accuracy of the oil pan detection; Prior art 2 ( (Application number CN202311107605.6, Chinese patent published on January 2, 2024) An air tightness detection device for an engine oil pan, comprising a detection base plate, a square frame is fixedly connected to the top surface of the detection base plate, an oil pan body is placed inside the square frame on the top surface of the detection base plate, an oil drain hole is opened above the oil pan body, an air pressure sensor body is installed inside the oil drain hole, and a stamping interface is installed on one side of the outer wall of the air pressure sensor body; when the leaking gas contacts the leakage detection component installed between the inner walls of the yield opening, the leakage detection component will be driven to rotate locally, so the specific position where the air tightness of the oil pan main body opening is poor can be judged from the position of the leakage detection component that has rotated locally, so that the staff can make relevant adjustments to the production components of the oil pan main body according to the position of poor airtightness detected by the leakage detection component to ensure the production quality of the oil pan main body.

[0004] The current sealing detection equipment generally only has one workstation. During the detection, the current product needs to be placed in, taken out after the detection, and then a new product needs to be placed in. This is time-consuming and the continuity of the detection is poor. In addition, when the detection is carried out by water immersion, water will remain on the surface of the shell, which needs to be dried later. It is also easy to pollute the surrounding environment due to water dripping. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-station automobile oil pan sealing detection device to solve the problem that the previous sealing detection equipment proposed in the above background technology generally only has one station, and the current product needs to be put in during the detection, taken out after the detection is completed, and then a new product needs to be put in, which is time-consuming and the continuity of the detection is poor. In addition, when the detection is performed by water immersion, water will remain on the surface of the shell.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-station automobile oil pan sealing detection device, comprising a mounting seat and a detection block, the detection block is arranged above the mounting seat, a detection groove is opened inside the detection block, and an elastic bonding layer is fixed above the detection groove, and a pressing plate is arranged above the detection groove, an air supply pipe is fixed above the pressing plate, and a telescopic device is connected above the pressing plate to control the vertical movement of the pressing plate, a pressure relief mechanism is arranged above the pressing plate to discharge the gas in the oil pan to the outside, and the lower part of the pressing plate A detection station for placing the oil pan is provided, a driving shaft is provided above the mounting seat, the detection stations are distributed at equal angles on the outside of the driving shaft with the center of the driving shaft as the center of the circle, and a driver is connected below the driving shaft to control the rotation of the driving shaft to drive the detection station to move, a connecting shaft is fixed on the side of the detection station close to the driving shaft, a vertical sliding mechanism is provided at the end of the connecting shaft, and the connecting shaft forms an up and down sliding structure with the driving shaft through the vertical sliding mechanism, so that the pressure plate presses down the detection station to drive the connecting shaft to move synchronously in the driving shaft.

[0007] To further optimize the technical solution, the detection station is designed as an enclosed structure, and the upper and lower surfaces of the detection station are both made of rubber material.

[0008] To further optimize the technical solution, a transparent observation window is provided on the front side of the detection slot to expose the deformation of the elastic bonding layer in the detection slot.

[0009] Further optimizing the technical solution, the pressure relief mechanism includes a pressure relief pipe, a baffle, a through port, a blocking block, a first spring, a detection mechanism and an automatic positioning mechanism; A pressure relief pipe is fixed above the pressure plate, and the pressure relief pipe passes through the pressure plate; a baffle, fixed inside the pressure relief pipe; The opening is opened in the middle of the baffle; A blocking block is arranged above the opening to block the opening; A first spring, arranged above the blocking block, provides a downward thrust for the blocking block; A detection mechanism is arranged on the outside of the pressure relief pipe to detect the airflow; The automatic positioning mechanism is arranged on the outer side of the blocking block to position the blocking block after it moves upward.

[0010] To further optimize the technical solution, the detection mechanism includes an air outlet and a detection wheel; An air outlet is arranged on the surface of the pressure relief pipe; The detection wheel is arranged at the outlet position of the air outlet, and when the air flow blows out, the detection wheel is blown to rotate.

[0011] To further optimize the technical solution, the automatic positioning mechanism includes a positioning slot, a positioning block, a first magnet, a second spring and a second magnet; A positioning groove is provided on the radial outer surface of the blocking block; A positioning block is arranged between the interior of the pressure relief pipe and the positioning groove to form a snap-fit ​​structure, and the positioning block is designed to be inclined toward one side of the positioning groove; A first magnet is fixed to an end of the positioning block away from the positioning groove; A second spring, fixed on the surface of the first magnet, provides thrust for the first magnet; The second magnet is arranged on the outer side of the pressure relief pipe. After the pressure plate rises, the second magnet faces the first magnet, and the second magnet and the first magnet have opposite magnetic poles and attract each other.

[0012] To further optimize the technical solution, an adjustment plate is connected above the first spring, and an adjustment rod is rotatably connected above the adjustment plate, and the adjustment rod passes through the upper end of the pressure relief pipe and forms a threaded connection with the pressure relief pipe, and a guide rod is fixed above the adjustment plate, and an up and down sliding structure is formed between the guide rod and the pressure relief pipe.

[0013] To further optimize the technical solution, the vertical sliding mechanism includes a movable block, a third spring and an automatic unloading mechanism; The movable block is arranged inside the driving shaft and between the driving shaft to form an up-and-down sliding structure, and the connecting shaft and the movable block form a rotation connection; A third spring is arranged below the movable block to provide thrust for the movable block; The automatic unloading mechanism is arranged on the outer side of the connecting shaft to control the rotation of the connecting shaft.

[0014] To further optimize the technical solution, the automatic unloading mechanism includes a torsion spring, a positioning rod, a connecting groove, a gear, a tooth plate and a fixing frame; A torsion spring is installed on the outside of the connecting shaft to provide a rotational restoring force for the connecting shaft; A positioning rod, fixed on the surface of the connecting shaft; A connecting groove is arranged inside the movable block, and the positioning rod is located inside the connecting groove and between the connecting grooves to form a sliding connection; A gear is fixed to the end of the connecting shaft close to the driving shaft; A tooth plate, arranged above the driving shaft; The fixing frame is fixed above the tooth plate, and the fixing frame and the pressing plate are fixedly connected.

[0015] A detection method for a multi-station automobile oil pan sealing detection device, the method comprising the following steps: Step 1: Place the oil pan to be tested on the top of the testing station from the left side of the equipment. The testing stations are evenly distributed on the outside of the drive shaft. After placing a group of oil pans, the drive shaft can be controlled to rotate through the driver to drive the testing station to move and bring the oil pan to the top of the testing block. At the same time, the next group of testing stations is vacant, and the oil pan can continue to be placed to achieve continuous testing; Step 2: After the oil pan on the inspection station is brought to the top of the inspection block, the pressing plate can be controlled to move downward through the telescopic device, so that the pressing plate pushes the oil pan and the inspection station to move downward, and the oil pan is sent into the inspection tank. At the same time, the inspection station and the inspection block are fitted. After the oil pan enters the inspection tank, it fits the elastic fitting layer and pushes the elastic fitting layer to deform, and then gas is sent into the oil pan through the air supply pipe to test the sealing of the oil pan; Step three: When the oil pan leaks during the inspection, the gas will pass through the oil pan into the space between the oil pan and the elastic bonding layer, causing the elastic bonding layer to expand and deform under the action of air pressure. The leakage situation and leakage position can be determined by observing the deformation and deformation position of the elastic bonding layer. When there is no leakage in the oil pan, the internal air pressure continues to increase. After reaching the pressure relief point of the pressure relief mechanism, the pressure relief mechanism works to discharge the gas, completing the inspection of the oil pan. After the inspection is completed, the pressure plate rises and resets, and the drive shaft continues to be controlled to rotate to remove the inspected oil pan, and at the same time, the inspection of the next group of oil pans continues.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The sealing of the oil pan is tested by using the elastic bonding layer in conjunction with the detection groove. When the oil pan leaks, the elastic bonding layer will deform, and the position of the leak can also be reflected by the deformation position. There is no need to immerse in water, the shell will not be contaminated, and subsequent drying is not required, which is more energy-efficient.

[0017] (2) The oil pan can be placed continuously and automatically loaded by setting up multiple inspection stations. The position of the inspection station is adjusted by rotating the drive shaft. During inspection, the placement and removal of the oil pan at other inspection stations are not affected, thereby improving the inspection convenience and efficiency of the equipment.

[0018] (3) The gas in the oil pan can be discharged to the outside through the pressure relief mechanism, which can also avoid the danger of overpressure during detection. After the pressure relief mechanism discharges the gas, it can drive the detection wheel to rotate, making it convenient for relevant personnel to observe.

[0019] (4) The blocking block can be positioned through the automatic positioning mechanism so that the gas can be continuously discharged, and after the pressure plate is moved up and reset, the blocking block can also be automatically moved down and reset to prepare for the next test, thereby improving the degree of automation of the equipment.

[0020] (5) The rotation of the connecting shaft can drive the inspection station to rotate, so that the oil pan that has completed the inspection can be poured downward, realizing automatic unloading of the product. The rotation of the connecting shaft can be controlled by the movement of the pressing plate, reducing the setting of the power source, and at the same time, the unloading can be automatically operated with the operation of the pressing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the top view structure of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the detection block of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the pressing plate of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at a in the middle; Figure 6 This is a schematic diagram of the main cross-sectional structure of the pressure relief pipe of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the detection station of the present invention; Figure 8 This is a schematic diagram of the main cross-sectional structure of the drive shaft of the present invention; Fig. 9 It is a schematic diagram of the side section structure of the movable block of the present invention; Fig.10 It is a schematic diagram of the main cross-sectional structure of the tooth plate of the present invention.

[0022] In the figure: 1. mounting base; 2. detection block; 3. detection groove; 4. elastic bonding layer; 5. transparent observation window; 6. pressure plate; 7. air supply pipe; 8. telescope; 9. detection station; 10. connecting shaft; 11. driving shaft; 12. driver; 13. conveying mechanism; 14. pressure relief pipe; 15. baffle; 16. through port; 17. blocking block; 18. first spring; 19. adjusting plate; 20. adjusting rod; 21. guide rod; 22. positioning groove; 23. positioning block; 24. first magnet; 25. second spring; 26. second magnet; 27. air outlet; 28. detection wheel; 29. ​​movable block; 30. third spring; 31. torsion spring; 32. positioning rod; 33. connecting groove; 34. gear; 35. tooth plate; 36. fixing frame. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 10 , the present invention provides the following technical solutions: a multi-station automobile oil pan sealing detection device, comprising a mounting seat 1 and a detection block 2, wherein the detection block 2 is arranged above the mounting seat 1; Embodiment 1: The present invention provides the following technical solution, which discloses that a detection groove 3 is opened inside the detection block 2, and an elastic bonding layer 4 is fixed above the detection groove 3, and a pressing plate 6 is arranged above the detection groove 3, an air supply pipe 7 is fixed above the pressing plate 6, and a telescopic device 8 is connected above the pressing plate 6 to control the vertical movement of the pressing plate 6, a pressure relief mechanism is arranged above the pressing plate 6 to discharge the gas in the oil pan to the outside, a detection station 9 for placing the oil pan is arranged below the pressing plate 6, and a driving shaft 11 is arranged above the mounting seat 1 The detection station 9 is distributed at equal angles on the outside of the driving shaft 11 with the center of the driving shaft 11 as the center of the circle, and a driver 12 is connected to the bottom of the driving shaft 11 to control the rotation of the driving shaft 11 to drive the detection station 9 to move. A connecting shaft 10 is fixed to the side of the detection station 9 close to the driving shaft 11, and a vertical sliding mechanism is provided at the end of the connecting shaft 10. The connecting shaft 10 forms an up and down sliding structure with the driving shaft 11 through the vertical sliding mechanism, so that the pressure plate 6 presses down the detection station 9 to drive the connecting shaft 10 to move synchronously in the driving shaft 11.

[0025] A detection method for a multi-station automobile oil pan sealing detection device, the method comprising the following steps: Step 1: Place the oil pan to be tested above the testing station 9 from the left side of the equipment. The testing stations 9 are evenly distributed on the outside of the drive shaft 11. After placing a group of oil pans, the drive shaft 11 can be controlled to rotate by the driver 12 to drive the testing station 9 to move and bring the oil pan to the top of the testing block 2. At the same time, the next group of testing stations 9 is vacant, and the oil pan can continue to be placed to achieve continuous testing.

[0026] Step 2: After the oil pan on the inspection station 9 is brought to the top of the inspection block 2, the pressure plate 6 can be controlled to move downward through the telescopic device 8, so that the pressure plate 6 pushes the oil pan and the inspection station 9 to move downward, and the oil pan is sent into the inspection groove 3. At the same time, the inspection station 9 and the inspection block 2 are fitted. After the oil pan enters the inspection groove 3, it will fit the elastic bonding layer 4 and push the elastic bonding layer 4 to deform, and then gas is sent into the oil pan through the air supply pipe 7 to test the sealing of the oil pan.

[0027] Step three: when the oil pan leaks during detection, the gas will pass through the oil pan into between the oil pan and the elastic bonding layer 4, causing the elastic bonding layer 4 to expand and deform under the action of air pressure. The leakage situation and the leakage position can be determined by observing the deformation and deformation position of the elastic bonding layer 4. When there is no leakage in the oil pan, the internal air pressure continues to increase. After reaching the pressure relief point of the pressure relief mechanism, the pressure relief mechanism works to discharge the gas, completing the detection of the oil pan. After the detection is completed, the pressure plate 6 rises and resets, and the drive shaft 11 continues to be controlled to rotate to remove the oil pan that has been inspected, and at the same time, the next group of oil pans are tested.

[0028] Embodiment 2: Based on Embodiment 1, the detection station 9 is disclosed to be designed in an enclosed structure, and the upper and lower surfaces of the detection station 9 are both made of rubber material. A transparent observation window 5 is provided on the front side of the detection groove 3 to expose the deformation of the elastic bonding layer 4 in the detection groove 3. The pressure relief mechanism includes a pressure relief pipe 14, a baffle 15, a port 16, a blocking block 17, a first spring 18, a detection mechanism and an automatic positioning mechanism. The pressure relief pipe 14 is fixed above the pressure plate 6, and the pressure relief pipe 14 passes through the pressure plate 6. The baffle 15 is fixed inside the pressure relief pipe 14. The port 1 6, opened in the middle of the baffle 15, the blocking block 17, arranged above the through-port 16 to block the through-port 16, the first spring 18, arranged above the blocking block 17 to provide a downward thrust for the blocking block 17, the detection mechanism, arranged on the outside of the pressure relief pipe 14 to detect the airflow, the automatic positioning mechanism, arranged on the outside of the blocking block 17 to position the blocking block 17 after the upward movement, the detection mechanism includes an air outlet 27 and a detection wheel 28, the air outlet 27 is arranged on the surface of the pressure relief pipe 14, the detection wheel 28 is arranged at the outlet position of the air outlet 27, the airflow When blowing out, the detection wheel 28 is blown to rotate, and the automatic positioning mechanism includes a positioning groove 22, a positioning block 23, a first magnet 24, a second spring 25 and a second magnet 26. The positioning groove 22 is opened on the radial outer surface of the blocking block 17, and the positioning block 23 is arranged between the inside of the pressure relief pipe 14 and the positioning groove 22 to form a clamping structure, and the positioning block 23 is inclined toward one side of the positioning groove 22. The first magnet 24 is fixed to the end of the positioning block 23 away from the positioning groove 22, and the second spring 25 is fixed on the surface of the first magnet 24. 24 provides thrust, the second magnet 26 is arranged on the outside of the pressure relief pipe 14, and after the pressure plate 6 rises, the second magnet 26 and the first magnet 24 are opposite to each other, and the second magnet 26 and the first magnet 24 have opposite magnetic poles and attract each other, an adjusting plate 19 is connected above the first spring 18, and an adjusting rod 20 is rotatably connected above the adjusting plate 19, and the adjusting rod 20 passes through the upper end of the pressure relief pipe 14 and forms a threaded connection between the pressure relief pipe 14, and a guide rod 21 is fixed above the adjusting plate 19, and an up and down sliding structure is formed between the guide rod 21 and the pressure relief pipe 14.

[0029] When the oil pan is not leaking, its internal air pressure will continue to increase, and the pressure will push the blocking block 17 to move upward to open the through hole 16. At the same time, the positioning block 23 will be connected to the positioning groove 22 to position the blocking block 17 so that the gas can be continuously discharged. The discharged gas blows the detection wheel 28 to rotate through the air outlet 27, which is convenient for the inspector to observe. At the same time, the pressure required for the movement of the blocking block 17 can also be adjusted according to the need of detecting the air pressure. When adjusting, the adjusting rod 20 is rotated to drive the adjusting plate 19 to move, and the compression amount of the first spring 18 is changed. Subsequently, the pressing plate 6 rises, and the second magnet 26 and the first magnet 24 are opposite to each other, attracting the first magnet 24 to drive the positioning block 23 to move, and the connection between the positioning block 23 and the positioning groove 22 is released. The blocking block 17 moves downward to continue to block the through hole 16, preparing for the next detection.

[0030] Embodiment 3: Based on the embodiment 1, a vertical sliding mechanism is disclosed, including a movable block 29, a third spring 30 and an automatic unloading mechanism. The movable block 29 is arranged inside the driving shaft 11 and between the driving shaft 11 to form an up and down sliding structure. The connecting shaft 10 and the movable block 29 form a rotation connection. The third spring 30 is arranged below the movable block 29 to provide thrust for the movable block 29. The automatic unloading mechanism is arranged on the outside of the connecting shaft 10 to control the rotation of the connecting shaft 10. The automatic unloading mechanism includes a torsion spring 31, a positioning rod 32, a connecting groove 33, The gear 34, the tooth plate 35 and the fixing frame 36, and the torsion spring 31 are installed on the outer side of the connecting shaft 10 to provide a rotational reset force for the connecting shaft 10. The positioning rod 32 is fixed on the surface of the connecting shaft 10. The connecting groove 33 is arranged inside the movable block 29. The positioning rod 32 is located in the connecting groove 33 and the connecting grooves 33 form a sliding connection. The gear 34 is fixed on one end of the connecting shaft 10 close to the driving shaft 11. The tooth plate 35 is arranged above the driving shaft 11. The fixing frame 36 is fixed above the tooth plate 35, and the fixing frame 36 and the pressure plate 6 are fixedly connected.

[0031] After the detection is completed, the pressing plate 6 rises upward, controls the driving shaft 11 to rotate, and sends the inspected oil pan to the rear side of the driving shaft 11. At the same time, the next group of oil pans continue to move with the detection station 9 to the top of the detection block 2, and continues to control the pressing plate 6 to move downward for sealing detection. When the pressing plate 6 moves downward, it will drive the tooth plate 35 to move downward through the fixing frame 36. The tooth plate 35 moves downward and engages with the gear 34 at the end of the connecting shaft 10 located on the rear side of the driving shaft 11, controls the rotation of the connecting shaft 10, and makes the connecting shaft 10 drive the detection station 9 to rotate, and pours out the inspected oil pan. A conveying mechanism 13 can be set below it to convey the fallen oil pan to realize automatic unloading.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-station automobile oil pan sealing detection device, comprising a mounting seat (1) and a detection block (2), wherein the detection block (2) is arranged above the mounting seat (1); Features: The detection block (2) is provided with a detection groove (3) inside, and an elastic bonding layer (4) is fixed above the detection groove (3), and a pressing plate (6) is arranged above the detection groove (3), an air supply pipe (7) is fixed above the pressing plate (6), and a telescopic device (8) is connected above the pressing plate (6) to control the vertical movement of the pressing plate (6), a pressure relief mechanism is arranged above the pressing plate (6) to discharge the gas in the oil pan to the outside, a detection station (9) for placing the oil pan is arranged below the pressing plate (6), a driving shaft (11) is arranged above the mounting seat (1), and the detection station ( 9) are distributed at equal angles on the outside of the driving shaft (11) with the center of the driving shaft (11) as the center of the circle, and a driver (12) is connected to the bottom of the driving shaft (11) to control the rotation of the driving shaft (11) to drive the detection station (9) to move. A connecting shaft (10) is fixed to the side of the detection station (9) close to the driving shaft (11), and a vertical sliding mechanism is provided at the end of the connecting shaft (10). The connecting shaft (10) forms an up and down sliding structure with the driving shaft (11) through the vertical sliding mechanism, so that the pressure plate (6) presses down the detection station (9) to drive the connecting shaft (10) to move synchronously in the driving shaft (11).

2. The multi-station automobile oil pan sealing detection device according to claim 1 is characterized in that: The detection station (9) is designed as an enclosed structure, and the upper and lower surfaces of the detection station (9) are both made of rubber material.

3. A multi-station automobile oil pan sealing detection device according to claim 1 or 2, characterized in that: A transparent observation window (5) is provided on the front side of the detection groove (3) to expose the deformation of the elastic bonding layer (4) in the detection groove (3).

4. The multi-station automobile oil pan sealing detection device according to claim 1 is characterized in that: The pressure relief mechanism comprises a pressure relief pipe (14), a baffle (15), a through port (16), a blocking block (17), a first spring (18), a detection mechanism and an automatic positioning mechanism; A pressure relief pipe (14) is fixed above the pressure plate (6), and the pressure relief pipe (14) passes through the pressure plate (6); A baffle (15) is fixed inside the pressure relief pipe (14); A through opening (16) is provided in the middle of the baffle (15); A blocking block (17) is arranged above the opening (16) to block the opening (16); A first spring (18), arranged above the blocking block (17) to provide a downward thrust for the blocking block (17); A detection mechanism, arranged on the outside of the pressure relief pipe (14) to detect the airflow; An automatic positioning mechanism is arranged on the outside of the blocking block (17) to position the blocking block (17) after it has moved upward.

5. The multi-station automobile oil pan sealing detection device according to claim 4 is characterized in that: The detection mechanism comprises an air outlet (27) and a detection wheel (28); An air outlet (27) is arranged on the surface of the pressure relief pipe (14); The detection wheel (28) is arranged at the outlet position of the air outlet (27), and when the airflow is blown out, the detection wheel (28) is blown to rotate.

6. A multi-station automobile oil pan sealing detection device according to claim 4 or 5, characterized in that: The automatic positioning mechanism comprises a positioning groove (22), a positioning block (23), a first magnet (24), a second spring (25) and a second magnet (26); A positioning groove (22) is formed on the radial outer surface of the blocking block (17); A positioning block (23) is arranged between the interior of the pressure relief pipe (14) and the positioning groove (22) to form a snap-fit ​​structure, and the positioning block (23) is designed to be inclined on one side facing the positioning groove (22); A first magnet (24) is fixed to an end of the positioning block (23) away from the positioning groove (22); A second spring (25) fixed on the surface of the first magnet (24) to provide thrust for the first magnet (24); The second magnet (26) is arranged on the outside of the pressure relief pipe (14), and after the pressure plate (6) rises, the second magnet (26) and the first magnet (24) are opposite to each other, and the second magnet (26) and the first magnet (24) have opposite magnetic poles and attract each other.

7. The multi-station automobile oil pan sealing detection device according to claim 4 is characterized in that: An adjustment plate (19) is connected above the first spring (18), and an adjustment rod (20) is rotatably connected above the adjustment plate (19), and the adjustment rod (20) passes through the upper end of the pressure relief pipe (14) and forms a threaded connection with the pressure relief pipe (14), and a guide rod (21) is fixed above the adjustment plate (19), and an up-and-down sliding structure is formed between the guide rod (21) and the pressure relief pipe (14).

8. The multi-station automobile oil pan sealing detection device according to claim 1 is characterized in that: The vertical sliding mechanism comprises a movable block (29), a third spring (30) and an automatic unloading mechanism; A movable block (29) is arranged inside the driving shaft (11) and between the driving shaft (11) to form an up-and-down sliding structure, and a rotation connection is formed between the connecting shaft (10) and the movable block (29); A third spring (30) is arranged below the movable block (29) to provide a thrust for the movable block (29); The automatic unloading mechanism is arranged on the outside of the connecting shaft (10) to control the rotation of the connecting shaft (10).

9. The multi-station automobile oil pan sealing detection device according to claim 8, characterized in that: The automatic unloading mechanism comprises a torsion spring (31), a positioning rod (32), a connecting groove (33), a gear (34), a toothed plate (35) and a fixing frame (36); A torsion spring (31) is installed on the outer side of the connecting shaft (10) to provide a rotational restoring force for the connecting shaft (10); A positioning rod (32) fixed on the surface of the connecting shaft (10); A connecting groove (33) is arranged inside the movable block (29), and the positioning rod (32) is located inside the connecting groove (33) and forms a sliding connection between the connecting grooves (33); A gear (34) is fixed to an end of the connecting shaft (10) close to the driving shaft (11); A tooth plate (35) is arranged above the drive shaft (11); The fixing frame (36) is fixed above the tooth plate (35), and the fixing frame (36) and the pressing plate (6) are fixedly connected.

10. A multi-station automobile oil pan sealing detection method, characterized in that: The method adopts the sealing detection device in claim 1, and the method comprises the following steps: Step 1: Place the oil pan to be tested on the top of the testing station (9) from the left side of the equipment. The testing stations (9) are evenly distributed on the outside of the drive shaft (11). After placing a group of oil pans, the drive shaft (11) can be controlled to rotate by the driver (12) so that it drives the testing station (9) to move and bring the oil pan to the top of the testing block (2). At the same time, the next group of testing stations (9) is vacant, and the oil pans can continue to be placed, so as to achieve continuous testing. Step 2: After the oil pan on the inspection station (9) is brought to the top of the inspection block (2), the pressing plate (6) can be controlled to move downwards by the telescopic device (8), so that the pressing plate (6) pushes the oil pan and the inspection station (9) to move downwards, and the oil pan is sent into the inspection tank (3). At the same time, the inspection station (9) and the inspection block (2) are fitted together. After the oil pan enters the inspection tank (3), it fits the elastic fitting layer (4) and pushes the elastic fitting layer (4) to deform. Then, gas is sent into the oil pan through the air supply pipe (7) to test the sealing performance of the oil pan. Step 3: When the oil pan leaks during the test, the gas will pass through the oil pan and enter between the oil pan and the elastic bonding layer (4), causing the elastic bonding layer (4) to expand and deform under the action of the gas pressure. The leakage and the leakage position can be determined by observing the deformation and deformation position of the elastic bonding layer (4). When the oil pan does not leak, the internal gas pressure continues to increase. After reaching the pressure relief point of the pressure relief mechanism, the pressure relief mechanism works to discharge the gas, completing the test of the oil pan. After the test is completed, the pressure plate (6) rises and resets, and the drive shaft (11) continues to be controlled to rotate to remove the oil pan that has been tested, while continuing to test the next group of oil pans.

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