New energy automobile die casting airtightness automatic detection device

Abstract

The invention relates to the technical field of automobile die casting air tightness detection, in particular to a new energy automobile die casting air tightness automatic detection device which comprises a detection mechanism arranged on a detection table, and a conveying mechanism and a coating mechanism are arranged on the front portion and the rear portion of the detection mechanism; through cooperation of the detection mechanism, the conveying mechanism and the coating mechanism, automatic discharging of fan motor shells detected to be qualified through a pressure drop method can be achieved, or leakage point detection and positioning of unqualified shells can be directly conducted, and therefore the redundant links of repeated disassembly, transfer and secondary clamping of the shells in traditional step-by-step operation are eliminated; through the cooperation of the detection mechanism, the conveying mechanism and the coating mechanism, a water immersion method detection device and an oil coating method detection device can be integrated in the same equipment, so that a corresponding detection mode is automatically matched according to the leakage data of the unqualified fan motor shell.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection of automobile die-casting parts, and in particular to an automatic air tightness detection device for die-casting parts of new energy vehicles. Background Art

[0002] New energy vehicle die-castings are aluminum alloy or other lightweight metal parts formed through a high-pressure casting process. Among them, the automobile fan motor housing die-casting is the external protective structure of the automobile cooling fan motor, which is used to wrap the internal components of the motor and play a role in fixation, heat dissipation and sealing protection; after the fan motor housing die-casting is formed, it is usually necessary to conduct an airtightness test on its side walls to ensure that the fan motor meets the required airtightness requirements.

[0003] In the existing mass production process, the air tightness of the fan motor casing is usually tested by the low-cost pressure drop method: first, the casing is positioned on the test bench, and a sealing gasket for sealing the lower opening of the casing is installed on the test bench. Then, the sealing disk is driven downward by the cylinder until the sealing disk cooperates with the sealing gasket to stably seal the upper end face of the casing, the pressure relief hole opened on the upper end face, and the lower end opening of the casing. At the same time, the air injection pipe installed on the lower side of the sealing disk moves synchronously until it is completely inserted into the interior of the casing from the opening of the upper end face of the casing, and a preset quantitative compressed air is injected into the casing. The high-precision detection system in the sealing disk and the detector then monitors the pressure changes inside the casing in real time and calculates the overall leakage amount. Finally, it is determined whether the air tightness of the fan motor casing meets the standard based on the set threshold.

[0004] However, the traditional method of using the pressure drop method to test the air tightness of the fan motor casing has the following problems: 1. In the existing technology, since the pressure drop method can only provide a conclusive result on whether the total amount of leakage of the fan motor casing exceeds the limit, and cannot directly locate the specific leakage position on the unqualified casing, when an unqualified fan motor casing is detected, the operator is required to remove the unqualified casing and then perform a secondary inspection of the casing through other equipment. The above-mentioned step-by-step operation method not only increases the overall detection time, manual operation burden and labor cost, and reduces the overall detection efficiency, but also may cause the leakage point information and production batch data of each casing to be confused with each other, thereby affecting the efficiency and accuracy of the targeted optimization of the die-casting process. Accuracy; 2. In the existing pressure drop detection process, the low-cost detection method for locating the leakage point of unqualified shells is usually the water immersion method or the oiling method. Since the water immersion method relies on the characteristics of gas breaking through the surface tension of the water body, the trace leakage caused by small gaps is difficult to show. Although the oiling method can locate smaller cracks, it requires manual oiling of the inside of the shell in sequence, and all unqualified shells need to be cleaned of oil again after the positioning detection is completed. If the two methods are introduced at the same time to take into account different leakage amounts, it will not only lead to an increase in detection stations and equipment and an increase in space costs, but also require manual repeated switching of equipment and clamping of the shell, resulting in a low degree of automation and an increase in manual intervention links, thereby reducing the overall detection efficiency. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic air tightness detection device for die-casting parts of new energy vehicles, which is used to automatically detect the air tightness of the automobile fan motor housing, including a detection platform, on which a detection mechanism is provided, and a conveying mechanism and a coating mechanism are provided on the front and rear of the detection mechanism.

[0006] The detection mechanism includes a top plate fixedly arranged on the upper side of the detection platform by a support rod, a sealing supporting part for supporting the shell is arranged on the lower side of the top plate, a detection part is arranged on the top plate for cooperating with the sealing supporting part to perform air tightness detection on the shell, and a water immersion part for immersing the shell in water is arranged on the detection platform and below the sealing supporting part.

[0007] The conveying mechanism includes a mounting platform that is symmetrically fixed on the lower side of the top plate, a linear conveying part for conveying the shell front and rear is provided on the mounting platform, a driven lifting part for cooperating with the detection part to position the shell is provided on the linear conveying part, and a clamping adjustment part for rotating the adjustment shell and a clamping driving part for driving the clamping adjustment part to position the clamping shell are provided on the driven lifting part.

[0008] The coating mechanism includes a fixing frame fixedly arranged on the lower side of the top plate and located behind the sealing support part, and the fixing frame is provided with a rotary coating part for automatically oiling the inside of the shell and a lifting supply part for replenishing grease to the rotary coating part.

[0009] The detection mechanism performs the first sealing test on the motor housing by the pressure reduction method. The clamping and adjusting part clamps the unqualified motor housing and rotates it backward ninety degrees, so that the coating mechanism coats grease on the inner wall of the motor housing. The clamping and adjusting part is reset, and the detection mechanism operates again to locate the leakage point on the unqualified motor housing.

[0010] Preferably, the sealing support portion includes a fixed plate fixed to the lower side of the top plate by a plurality of evenly distributed connecting rods, a supporting platform is fixedly provided on the upper side of the fixed plate, and a sealing rubber gasket is installed on the upper side of the supporting platform.

[0011] Preferably, the detection part includes a detector installed on the front end of the upper surface of the top plate, a cylinder 1 is fixedly provided on the top plate, a sealing pressure plate that moves up and down is fixedly provided at the telescopic end of the cylinder 1, and an air injection pipe is installed on the lower side of the sealing pressure plate.

[0012] Preferably, the immersion part includes a cylinder 2 fixedly arranged on the lower side of the detection platform, a transparent water tank with an upward opening is fixedly arranged on the telescopic end of the cylinder 2, and a plurality of guide rods 1 slidingly connected to the detection platform are evenly fixed on the lower side of the transparent water tank.

[0013] Preferably, the linear conveying part includes a guide rail installed on the lower side of the mounting platform and located above the supporting platform, an electric slider that moves back and forth is slidably provided on the guide rail, and a movable platform is fixedly provided on the lower side of the left and right symmetrical electric sliders.

[0014] Preferably, the driven lifting part includes a spring rod 1 that is symmetrically fixed on the lower side of the movable platform, and a lifting slide that moves up and down is elastically slidably arranged on the symmetrical spring rod 1. Two groups of guide rods 2 are symmetrically fixed on the rear side of the lifting slide through a support 1, and each group consists of two guide rods 2 that are symmetrical up and down.

[0015] Preferably, the clamping adjustment part includes a left-right movable clamping slide that is slidably arranged on two upper and lower symmetrical guide rods. A rotating cylinder is fixedly arranged on the opposite side of the left and right symmetrical clamping slides, and a U-shaped clamping claw is fixedly arranged on the driving end of the rotating cylinder.

[0016] Preferably, the clamping drive part includes a linear groove one which is symmetrically opened on the lifting slide and corresponds to the clamping slide one by one. The linear groove one extends left and right and passes through front and back. A sliding shaft one which is slidingly connected to the corresponding linear groove one is fixedly provided on the front side of the clamping slide. A cylinder three which is symmetrically fixed to the sliding shaft one by a support two is provided on the front side of the lifting slide. The telescopic end of the cylinder three is fixedly connected to the corresponding sliding shaft one through a connecting plate one.

[0017] Preferably, the rotary coating part includes a motor fixedly arranged on the rear side of the fixed frame, an L-shaped turntable is fixedly arranged on the driving end of the motor, two spring rods are elastically slidably arranged front and back symmetrically on the horizontal section of the L-shaped turntable, and an oiling brush is fixedly arranged on the upper ends of the two front and back symmetrical spring rods through two connecting plates.

[0018] Preferably, the lifting and supply part includes two linear grooves symmetrically opened on the fixed frame, the linear grooves are connected from front to back and extend up and down, and a sliding shaft two that moves up and down is slidably connected in the linear grooves. The front ends of the two symmetrical sliding shafts are fixed with an oil box with an upper end opening, and the rear ends of the two symmetrical sliding shafts are fixed with a connecting plate three. The lower end of the rear side of the fixed frame is fixed with an electric push rod with a telescopic end fixedly connected to the connecting plate three through a support three.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with the detection mechanism, the conveying mechanism and the coating mechanism to realize automatic unloading of fan motor casings that have passed the pressure drop method test, or directly detect and locate the leakage points of unqualified casings, thereby eliminating the redundant links of repeated disassembly, transportation and secondary clamping of the casings in the traditional step-by-step operation, greatly shortening the detection cycle and reducing the intensity of manual intervention, thereby improving the overall detection efficiency. At the same time, it can also directly associate the leakage location, leakage degree and production batch data of each casing, avoiding the mutual separation or confusion of various information of the casings, and providing an intuitive basis for the precise optimization of the die-casting process.

[0020] 2. The present invention can integrate water immersion and oiling detection devices in the same device through the cooperation of the detection mechanism, the conveying mechanism and the coating mechanism, so as to automatically match the corresponding detection mode according to the leakage data of the unqualified fan motor housing. The above-mentioned operation method can not only take into account the two detection modes at the same time, but also avoid the difficulty of locating smaller gaps by the water immersion method, and reduce the number of shells to be cleaned for detection by the oiling method, and can realize automatic oiling and water immersion, without the need for manual equipment switching and repeated clamping of the shell, greatly reducing manual intervention, significantly improving the overall detection efficiency, and reducing the overall labor cost. At the same time, the integrated design significantly reduces the space occupied by multiple detection stations and detection equipment, thereby reducing the overall production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a partial cross-sectional schematic diagram of part of the structure of the present invention.

[0023] Figure 3 It is a partial cross-sectional diagram of part of the detection mechanism structure.

[0024] Figure 4 It is a partial cross-sectional diagram of the conveying mechanism structure.

[0025] Figure 5 It is a partial cross-sectional schematic diagram of the coating mechanism structure.

[0026] In the figure: 1. Testing platform; 2. Testing mechanism; 21. Top plate; 22. Sealing support part; 221. Fixing plate; 222. Support platform; 23. Testing part; 231. Detector; 232. Cylinder 1; 233. Sealing pressure plate; 234. Gas injection pipe; 24. Immersing part; 241. Cylinder 2; 242. Transparent water tank; 243. Guide rod 1; 3. Conveying mechanism; 31. Mounting platform; 32. Linear conveying part; 321. Guide rail; 322. Electric slider; 323. Moving platform; 33. Driven lifting part; 3 31. Spring rod one; 332. Lifting slide; 333. Guide rod two; 34. Clamping adjustment unit; 341. Clamping slide; 342. Rotating cylinder; 343. U-shaped clamp; 35. Clamping drive unit; 351. Slide one; 352. Cylinder three; 4. Coating mechanism; 41. Fixed frame; 42. Rotating coating unit; 421. Motor; 422. L-shaped rotating table; 423. Spring rod two; 424. Oiling brush; 43. Lifting supply unit; 431. Slide two; 432. Oil box; 433. Electric push rod. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1 An automatic air tightness detection device for new energy vehicle die-casting parts is used to automatically detect the air tightness of the automobile fan motor housing, including a detection platform 1, on which a detection mechanism 2 is provided, and a conveying mechanism 3 and a coating mechanism 4 are provided in front and behind the detection mechanism 2.

[0029] See also Figure 1 The detection mechanism 2 includes a top plate 21 fixed on the upper side of the detection platform 1 by a support rod, a sealing support portion 22 for supporting the shell is provided between the top plate 21 and the detection platform 1, and a detection portion 23 is provided on the top plate 21 for cooperating with the sealing support portion 22 to perform sealing and airtightness detection on the shell. A water immersion portion 24 for performing water immersion detection on the shell is provided on the detection platform 1 and below the sealing support portion 22.

[0030] See also Figure 1 、 Figure 2 and Figure 3 The sealing support portion 22 includes a fixed plate 221 fixed to the lower side of the top plate 21 by a plurality of evenly distributed connecting rods, a supporting platform 222 is fixedly provided on the upper side of the fixed plate 221, and a sealing rubber pad is installed on the upper side of the supporting platform 222.

[0031] See also Figure 1 、 Figure 2 and Figure 3 The detection part 23 includes a detector 231 installed at the front end of the upper surface of the top plate 21, a cylinder 232 is fixedly provided on the top plate 21, and a sealing pressure plate 233 that moves up and down is fixedly provided at the telescopic end of the cylinder 232, and an air injection pipe 234 is installed on the lower side of the sealing pressure plate 233. The sealing pressure plate 233, the air injection pipe 234 and the detector 231 are jointly provided with a high-precision detection system for real-time monitoring of the pressure changes inside the shell and calculating the overall leakage amount.

[0032] When the fan motor housing is to be tested for air tightness, the housing is first driven to move to the bottom of the sealing pressure plate 233 by the conveying mechanism 3 and the opening of the upper end face of the housing is aligned with the gas injection pipe 234, and then the sealing pressure plate 233 is driven downward by the cylinder 1 232 until the sealing pressure plate 233 is in contact with the upper end face of the housing and the gas injection pipe 234 is completely inserted into the interior of the housing through the opening of the upper end face of the housing, and then the sealing pressure plate 233 is driven downward by the cylinder 1 232 until the lower end of the housing is tightly in contact with the sealing gasket on the upper side of the support platform 222, thereby passing the sealing pressure plate 233. The plate 233 cooperates with the sealing gasket to stably seal the upper end face of the shell, the pressure relief hole opened on the upper end face and the lower end opening of the shell, and then the preset quantitative compressed air is injected into the shell through the air injection pipe 234. The high-precision detection system in the sealing pressure plate 233 and the detector 231 then monitors the pressure changes inside the shell in real time and calculates the overall leakage volume, and finally determines whether the air tightness of the fan motor casing meets the standard based on the set threshold. The detector 231 is an existing detection system, and the air injection pipe 234 is connected to the existing air pump to achieve quantitative air injection.

[0033] See also Figure 1 and Figure 2 The immersion part 24 includes a second cylinder 241 fixedly arranged on the lower side of the detection platform 1, and a transparent water tank 242 with an upward opening is fixedly arranged at the telescopic end of the second cylinder 241. A plurality of guide rods 243 slidably connected to the detection platform 1 are evenly fixed on the lower side of the transparent water tank 242.

[0034] When it is detected that the air pressure leakage of the fan motor casing exceeds the set threshold by a large amount, the transparent water tank 242 storing a certain amount of clean water and the guide rod 1 243 are driven upward by cylinder 241 until the clean water completely submerges the casing positioned and sealed on the support platform 222. At this time, a certain amount of compressed air is continuously injected into the casing through the air injection pipe 234, and the position of the bubbles continuously escaping from the side wall of the casing is carefully observed to accurately locate the position of the larger defect on the side wall of the casing.

[0035] See also Figure 1 and Figure 2 The conveying mechanism 3 includes a mounting platform 31 which is symmetrically fixed on the lower side of the top plate 21. A linear conveying portion 32 for conveying the shell forward and backward is provided on the mounting platform 31. A driven lifting portion 33 for cooperating with the detection portion 23 to position the shell is provided on the linear conveying portion 32. A clamping adjustment portion 34 for rotating and adjusting the shell and a clamping driving portion 35 for driving the clamping adjustment portion 34 to position and clamp the shell are provided on the driven lifting portion 33.

[0036] See also Figure 2 and Figure 3 The linear conveying part 32 includes a guide rail 321 installed on the lower side of the mounting platform 31 and located above the supporting platform 222. An electric slider 322 that moves back and forth is slidably provided on the guide rail 321, and a moving platform 323 is fixedly provided on the lower side of the left and right symmetrical electric sliders 322.

[0037] See also Figure 2 、 Figure 3 and Figure 4 The driven lifting part 33 includes a spring rod 331 symmetrically fixed on the lower side of the moving platform 323, and a lifting slide 332 that moves up and down is elastically slidably provided on the symmetrical spring rod 331. Two groups of guide rods 333 are fixedly provided on the rear side of the lifting slide 332 symmetrically through a support 1, and each group consists of guide rods 333 symmetrically.

[0038] See also Figure 2 、 Figure 3 and Figure 4 The clamping adjustment part 34 includes a left-right movable clamping slide 341 that is slidably arranged on two upper and lower symmetrical guide rods 333. A rotating cylinder 342 is fixedly arranged on the opposite side of the left and right symmetrical clamping slides 341, and a U-shaped clamping claw 343 is fixedly arranged on the driving end of the rotating cylinder 342.

[0039] See also Figure 2 and Figure 4The clamping drive part 35 includes a linear groove 1 that is symmetrically opened on the lifting slide 332 and corresponds to the clamping slide 341. The linear groove 1 extends left and right and passes through front and back. A sliding shaft 1 351 that is slidably connected to the corresponding linear groove 1 is fixedly provided on the front side of the clamping slide 341. The front side of the lifting slide 332 is symmetrically fixed with a cylinder 352 that corresponds to the sliding shaft 1 351 through a support 2. The telescopic end of the cylinder 352 is fixedly connected to the corresponding sliding shaft 1 351 through a connecting plate 1.

[0040] When the fan motor housing needs to be clamped and adjusted, cylinder three 352 contracts, and cylinder three 352 drives connecting plate one and its corresponding sliding shaft one 351 to slide along corresponding linear groove one, so that sliding shaft one 351 drives the left and right symmetrical clamping slides 341 to move relative to each other along guide rod two 333, and the clamping slides 341 then drive the left and right symmetrical rotating cylinders 342 and U-shaped clamping claws 343 to move synchronously relative to each other until the U-shaped clamping claws 343 are stably clamped at a specific position of the shell. At the same time, the rotating cylinder 342 can drive the U-shaped clamping claws 343 and the clamped and positioned shell to rotate backward ninety degrees, so that the lower end opening of the shell is stably facing backward.

[0041] When the air tightness test of the fan motor housing is to be carried out, the moving platform 323 is first driven by the electric slider 322 to move backward along the guide rail 321 to a specific distance, and the spring rod 1 331 then drives the clamping slide 341 and the U-shaped claw 343 to move the shell backward synchronously through the lifting slide 332 until the opening of the upper end face of the shell is aligned with the gas injection pipe 234. In the process of the sealing pressure plate 233 moving downward to press the upper end face of the shell, the U-shaped claw 343 clamping the shell is then driven by the clamping slide 341 to move downward synchronously along the spring rod 1 331 until the shell is completely sealed and positioned on the support platform 222. At this time, the U-shaped claw 343 is again driven by the cylinder 352 to temporarily release the fit with the specific position of the shell side wall to avoid blocking and sealing the defective position of the shell side wall.

[0042] When the fan motor housing inspection is completed and qualified, the shell is first stably clamped again by the U-shaped clamp 343, and then the sealing pressure plate 233 is driven to move upward and reset by the cylinder 1 232. The lifting slide 332 synchronously drives the U-shaped clamp 343 and the shell to move upward and reset to the highest point under the elastic action of the spring rod 1 331. At this time, the sealing pressure plate 233 and the air injection pipe 234 that continue to move upward are completely separated from the shell, and then the U-shaped clamp 343 and the shell are driven forward by the electric slider 322 until they are completely separated from the fixed plate 221 and the transparent water tank 242. At this time, the clamping of the U-shaped clamp 343 can be released to unload the qualified shell, and then the shell to be inspected can be automatically clamped.

[0043] See also Figure 1 and Figure 2 The coating mechanism 4 includes a fixing frame 41 fixedly arranged on the lower side of the top plate 21 and located behind the fixing plate 221. The fixing frame 41 is provided with a rotating coating part 42 for automatically oiling the inside of the shell and a lifting supply part 43 for replenishing grease to the rotating coating part 42.

[0044] See also Figure 2 and Figure 5 The rotary coating part 42 includes a motor 421 fixedly arranged on the rear side of the fixed frame 41, and an L-shaped rotating platform 422 is fixedly arranged on the driving end of the motor 421. A spring rod 423 is elastically slidably arranged on the horizontal section of the L-shaped rotating platform 422 in a front-to-back symmetrical manner. The upper ends of the front-to-back symmetrical spring rods 423 are fixedly provided with an oiling brush 424 through a connecting plate 2.

[0045] When sufficient grease is to be applied to the inner side wall of the shell, the U-shaped clamp 343 is first used to clamp the shell again and the sealing pressure plate 233 is driven to reset upward by the cylinder 1 232. At this time, the U-shaped clamp 343 drives the shell to move upward along the spring rod 1 331 and reset to the highest point. Then, the U-shaped clamp 343 and the shell are driven to rotate backward ninety degrees by the rotating cylinder 342, so that the lower end opening of the shell is stably facing backward. Then, the shell is driven backward by the electric slider 322 to move a specific distance until the oiling brush 424 adsorbed with grease is completely docked into the interior of the shell and stably fits on the inner side wall of the shell under the action of the spring rod 2 423. At this time, the L-shaped turntable and the spring rod 2 423 are driven by the motor 421 to rotate continuously at a slow speed, and the spring rod 2 423 drives the oiling brush 424 to evenly apply along the inner side wall of the shell until the inner side wall of the shell is coated with sufficient grease.

[0046] When it is detected that the air pressure leakage of the fan motor casing exceeds the set threshold by a small amount, the U-shaped clamp 343 is used to drive the casing to move and adjust, and the inner side wall of the casing is evenly coated with sufficient grease in conjunction with the oiling brush 424. Then, the U-shaped clamp 343 is used again to drive the casing to move and adjust, and the sealing pressure plate 233 is used to stably seal the casing on the support platform 222. Then, a certain amount of compressed air is continuously injected into the casing again, and the position where bubbles continue to escape or oil film appears on the side wall of the casing is carefully observed, so as to accurately locate the position of smaller defects on the side wall of the casing.

[0047] The above-mentioned operation method can not only realize the automatic unloading of qualified fan motor casings, or directly detect and locate the leakage points of unqualified casings, but also eliminate the redundant links of repeated disassembly, transportation and secondary clamping of the casings in the traditional step-by-step operation, thereby improving the overall detection efficiency and providing an intuitive basis for the precise optimization of the die-casting process. In addition, it can automatically take into account two detection modes at the same time, which can avoid the difficulty of locating smaller gaps by the water immersion method, and reduce the number of casings to be cleaned by the oiling method, thereby significantly reducing the space occupied by multiple detection stations and detection equipment, and reducing the overall production cost.

[0048] See also Figure 2 and Figure 5 The lifting and supplying part 43 includes a linear groove 2 symmetrically opened on the fixed frame 41. The linear groove 2 runs through the front and back and extends up and down. A sliding shaft 2 431 that moves up and down is slidably connected in the linear groove 2. The front ends of the left and right symmetrical sliding shafts 431 are fixed with an oil box 432 with an upper end opening. The rear ends of the left and right symmetrical sliding shafts 431 are fixed with a connecting plate 3. The lower end of the rear side of the fixed frame 41 is fixed with an electric push rod 433 whose telescopic end is fixedly connected to the connecting plate 3 through a support 3.

[0049] When the grease absorbed on the oiling brush 424 needs to be replenished, the motor 421 is first used to drive the oiling brush 424 to rotate to the bottom side, and then the electric push rod 433 drives the connecting plate three and the sliding shaft 2 431 to move upward along the straight groove 2. The sliding shaft 2 431 then drives the oil box 432 storing a certain amount of grease to move upward synchronously until the oiling brush 424 is immersed in the grease in the oil box 432, thereby completing the replenishment of the grease on the oiling brush 424.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic air tightness detection device for die-casting parts of new energy vehicles, used for automatically detecting the air tightness of automobile fan motor housings, including a detection platform, characterized by: The detection table is provided with a detection mechanism, and a conveying mechanism and a coating mechanism are provided on the front and back of the detection mechanism; The detection mechanism includes a top plate fixedly arranged on the upper side of the detection platform by a support rod, a sealing support portion for supporting the shell is provided on the lower side of the top plate, a detection portion is provided on the top plate to cooperate with the sealing support portion to perform airtightness detection on the shell, and a water immersion portion for immersing the shell in water is provided on the detection platform and below the sealing support portion; The conveying mechanism includes a mounting platform symmetrically fixedly arranged on the lower side of the top plate, a linear conveying portion for conveying the shell front and back is provided on the mounting platform, a driven lifting portion for cooperating with the detection portion to position the shell is provided on the linear conveying portion, and a clamping adjustment portion for rotating and adjusting the shell and a clamping drive portion for driving the clamping adjustment portion to position and clamp the shell is provided on the driven lifting portion; The coating mechanism includes a fixing frame fixedly arranged on the lower side of the top plate and located behind the sealing support portion, and a rotating coating portion for automatically applying oil to the interior of the shell and a lifting supply portion for replenishing grease to the rotating coating portion are arranged on the upper and lower parts of the fixing frame; The detection mechanism performs the first sealing test on the motor housing by the pressure reduction method. The clamping and adjusting part clamps the unqualified motor housing and rotates it backward ninety degrees, so that the coating mechanism coats grease on the inner wall of the motor housing. The clamping and adjusting part is reset, and the detection mechanism operates again to locate the leakage point on the unqualified motor housing.

2. The automatic air tightness detection device for die castings of new energy vehicles according to claim 1 is characterized in that: The sealing support part includes a fixed plate fixedly arranged on the lower side of the top plate through a plurality of evenly distributed connecting rods, a supporting platform is fixedly arranged on the upper side of the fixed plate, and a sealing rubber pad is installed on the upper side of the supporting platform.

3. The automatic air tightness detection device for die castings of new energy vehicles according to claim 1 is characterized in that: The detection part includes a detector installed on the front end of the upper surface of the top plate, a cylinder 1 is fixedly provided on the top plate, a sealing pressure plate that moves up and down is fixedly provided at the telescopic end of the cylinder 1, and an air injection pipe is installed on the lower side of the sealing pressure plate.

4. The automatic air tightness detection device for die castings of new energy vehicles according to claim 1 is characterized in that: The immersion part includes a second cylinder fixedly arranged on the lower side of the detection platform, a transparent water tank with an upward opening fixedly arranged on the telescopic end of the second cylinder, and a plurality of guide rods 1 slidingly connected to the detection platform evenly fixedly arranged on the lower side of the transparent water tank.

5. The automatic air tightness detection device for die castings of new energy vehicles according to claim 2 is characterized in that: The linear conveying part includes a guide rail installed on the lower side of the installation platform and located above the supporting platform. An electric slider that moves back and forth is slidably provided on the guide rail, and a moving platform is fixedly provided on the lower side of the left and right symmetrical electric sliders.

6. The automatic air tightness detection device for die castings of new energy vehicles according to claim 5 is characterized in that: The driven lifting part includes a spring rod 1 that is symmetrically fixed to the lower side of the moving platform. A lifting slide that moves up and down is elastically slidably arranged on the symmetrical spring rod 1. Two groups of guide rods 2 are fixedly symmetrically on the rear side of the lifting slide through a support 1, and each group is composed of two guide rods 2 that are symmetrical up and down.

7. The automatic air tightness detection device for die castings of new energy vehicles according to claim 6 is characterized in that: The clamping adjustment part includes a left-right movable clamping slide that is slidably arranged on two upper and lower symmetrical guide rods. A rotating cylinder is fixedly arranged on the opposite side of the left and right symmetrical clamping slides, and a U-shaped clamping claw is fixedly arranged on the driving end of the rotating cylinder.

8. The automatic air tightness detection device for die castings of new energy vehicles according to claim 7 is characterized in that: The clamping drive part includes a linear groove 1 that is symmetrically opened on the lifting slide and corresponds to the clamping slide one by one. The linear groove 1 extends left and right and passes through front and back. A sliding shaft 1 that is slidably connected to the corresponding linear groove 1 is fixedly provided on the front side of the clamping slide. A cylinder 3 that corresponds to the sliding shaft 1 is fixedly provided on the front side of the lifting slide through a support 2 that is symmetrically fixed on the left and right through the support. The telescopic end of the cylinder 3 is fixedly connected to the corresponding sliding shaft 1 through a connecting plate 1.

9. The automatic air tightness detection device for die castings of new energy vehicles according to claim 1, characterized in that: The rotary coating part includes a motor fixedly arranged on the rear side of the fixed frame, an L-shaped rotating table is fixedly arranged on the driving end of the motor, two spring rods are elastically slidably arranged front and back symmetrically on the horizontal section of the L-shaped rotating table, and an oiling brush is fixedly arranged on the upper ends of the two front and back symmetrical spring rods through a connecting plate.

10. The automatic air tightness detection device for die castings of new energy vehicles according to claim 1, characterized in that: The lifting and supplying part includes two linear grooves symmetrically opened on the fixed frame, the linear grooves are connected from front to back and extend up and down, and a sliding shaft two that moves up and down is slidably connected in the linear grooves. The front ends of the two symmetrical sliding shafts are fixed with an oil box with an upper end opening, and the rear ends of the two symmetrical sliding shafts are fixed with a connecting plate three. The lower end of the rear side of the fixed frame is fixed with an electric push rod with a telescopic end fixedly connected to the connecting plate three through a support three.

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