Automobile battery tray air tightness detection tool

Abstract

The utility model provides an automobile battery tray air tightness detection tool comprising a lower rack, the lower rack comprises a workpiece supporting box used for supporting, the surface of a box body of the workpiece supporting box is provided with a linear guide rail used for automatically pushing a workpiece, and the top of the linear guide rail is provided with a workpiece placing clamp plate used for bearing the workpiece. Two roller sets used for sliding front and back are symmetrically arranged on the two sides of the bottom of the plate face of the workpiece containing clamp plate respectively, the bottoms of the two roller sets are used for controlling the workpiece containing clamp plate to be pushed into the detection end, and clamping of the structure of the side wall of the automobile battery box is achieved through the adopted side sealing assembly supporting frame structure. And pressurizing and packaging are carried out on a supporting structure of the traction cross rod and the pushing bracket.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicles, specifically a tooling for testing the airtightness of automotive battery trays. Background Technology

[0002] The automotive battery tray is a core structural component of the new energy vehicle battery system, also known as a battery box, battery shell, or battery bracket. It forms the skeleton of the battery system, primarily undertaking three functions: safety protection, impact resistance, and thermal management. A search of application CN202323252279.6 reveals a utility model disclosure for a small sealed workpiece airtightness testing fixture for new energy battery packs. This fixture includes an airtightness testing mechanism; the mechanism includes a material carrier with a cavity for placing the workpiece for testing; a sealing gasket within the cavity; and a baffle plate within the cavity that abuts against the sealing gasket. Several testing air pipe connectors are mounted and connected to the baffle plate. During testing, the outlet end of the testing air pipe connectors is located at the inlet end of the workpiece. The fixture also includes a pushing mechanism for pushing the workpiece, through which the sealing gasket presses against the workpiece during testing. This device addresses the shortcomings of low accuracy, easy leakage, and poor operability in airtightness testing of small-sized components. However, the above description still has the following drawbacks in actual use: the traditional battery tray is not convenient enough for air tightness testing, and the air tightness of the tray cannot usually be automatically tested. Relying solely on manual air tightness testing of the battery tray is stressful and cannot achieve automated testing, thus failing to obtain the desired air tightness data. Moreover, there are common problems that urgently need to be solved during testing: in the conventional testing of the air tightness of battery trays in automotive workpiece fixtures, the fixture slide is controlled to slide in and out of the equipment and the water tank rises and falls. However, the problem that arises is that the water tank and the sliding slide structure are prone to motion interference, causing the machine to be unable to smoothly remove and place the battery into the box. Utility Model Content

[0003] The purpose of this invention is to provide a tooling for testing the airtightness of automotive battery trays, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a tooling for testing the airtightness of an automotive battery tray, comprising a lower frame, the lower frame including a workpiece support box for support, the surface of the workpiece support box being provided with a linear guide rail for automatically pushing the workpiece, the top of the linear guide rail being provided with a workpiece placement fixture plate for carrying the workpiece, the bottom sides of the workpiece placement fixture plate being symmetrically provided with two sets of rollers for sliding back and forth, the bottom of the two sets of rollers serving as a control for pushing the workpiece placement fixture plate toward the testing end, the end of the rollers being provided with a water receiving groove for connection, and the workpiece placement fixture plate also having a built-in pushing mechanism for workpiece connection at a corresponding position;

[0005] The built-in pushing mechanism consists of: workpiece clamp slide rail, workpiece clamp pulley group, first clamp placement positioning block and lifting cylinder. The workpiece clamp slide rail is symmetrically installed on both sides of the workpiece placement clamp plate. Lifting cylinder is provided on both sides of the bottom of the workpiece clamp pulley group. The first clamp placement positioning block is installed on the side wall of the workpiece placement clamp plate.

[0006] The workpiece placement fixture plate is pushed into place by the workpiece fixture slide rail and the workpiece fixture pulley group, and the top extension and retraction of the lifting cylinder controls the up and down movement of the workpiece fixture slide rail.

[0007] As a preferred embodiment of the present invention: the four corners of the workpiece placement fixture plate are respectively provided with first workpiece pressing components, and two independent second fixture placement positioning blocks are connected to the side wall of the workpiece fixture pulley group. The side walls of the two second fixture placement positioning blocks are also provided with lifting slide connecting components for lifting and sliding.

[0008] As a preferred embodiment of this utility model: an extension cylinder assembly for receiving the workpiece is also installed at a position corresponding to the position of the workpiece fixture slide guide rail. The extension cylinder assembly is connected to the transfer and placement test chamber of the lifting slide connecting assembly. A safety light curtain is assembled around the outside of the transfer and placement test chamber. A high-precision leak detector is also assembled on one side of the safety light curtain. A touch screen for feedback of air pressure difference data and equipment operation is attached to the top surface of the high-precision leak detector. Several electrical switches for operating the equipment are arranged sequentially on the bottom surface of the touch screen. A three-color light for displaying the working status of the equipment is installed on the top side of the high-precision leak detector.

[0009] As a preferred embodiment of this utility model: the surface of the safety light curtain is covered with an upper frame, and a pushing mechanism is distributed on the top surface of the upper frame. The pushing mechanism consists of: a lifting cylinder, a cylinder seat, and a guide slide rod for the linear movement of the guiding cylinder.

[0010] The lifting cylinder has a push cylinder at its end, and the cylinder body extension end of several push cylinders has an upper clamp mounting plate. The bottom middle of the lifting guide column has a lower push guide column connecting plate for support.

[0011] As a preferred embodiment of the present utility model: a plurality of second workpiece pressing components are arranged sequentially on the bottom surface of the lower push guide column connecting plate, and a spring buffer spring for elastic buffering is provided at the bottom center of the plurality of second workpiece pressing components, and a lower support plate for elastic buffering is provided at the bottom center of the plurality of spring buffer springs, and an adaptation support mechanism is provided on both sides of the bottom of the lower support plate.

[0012] The adapter support mechanism includes an access base installed on both sides of the lower support plate sidewall. The surface of the access base is provided with a side sealing component support frame for support. A side sealing component is installed on the top surface of the side sealing component support frame. A workpiece anti-collision guide block is installed on the side wall of the side sealing component.

[0013] As a preferred embodiment of this utility model: the upper clamp mounting plate lifting guide column is provided with adjustable side plates for support on both sides, wherein the end of the side sealing component is provided with an inflation structure for gas insertion, the inflation structure includes a pressure measuring unit and an analysis unit, the end of the side sealing component is sealed and connected to the workpiece side wall with the corresponding end, and a cylinder push-pull connector is provided at the edge of the access base, one end of the cylinder push-pull connector is corresponding to the surface position of the corresponding access base.

[0014] As a preferred embodiment of this utility model: a lifting water tank mechanism is provided at the position corresponding to the lower push guide column connecting plate. The lifting water tank mechanism includes a lifting water tank placed at the bottom of the workpiece. Connecting steel frames for connection are provided at the four corners of the bottom of the lifting water tank. One end of the connecting steel frame is supported.

[0015] As a preferred embodiment of this utility model: the support height of the extension cylinder assembly is higher than the discharge port height of the lifting water tank, and the transmission end of the extension cylinder assembly can be retracted to the central area of ​​the lifting water tank. One side of the workpiece is blocked by the alignment assembly, and the positioning block is also equipped with a positioning pin for positioning the workpiece.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1) The side sealing component support frame structure is used to clamp the side wall of the car battery box. The traction crossbar and push bracket support structure are used for pressure sealing. The state of the battery tray is evenly processed to judge the sealing characteristics of the battery box. The purpose is to make the entire process of pushing and connecting the workpiece to the water tank in the lifting water tank more smooth and unobstructed. Moreover, the mechanized control combined with the workpiece clamping positioning block on the inner wall of the machine positions the workpiece, so that the workpiece is automatically centered and positioned at the leak detection station for leak detection.

[0018] 2) The dual-cylinder opposing installation structure drives the workpiece fixture to move back and forth, changing the position of the structure. The support of the high-precision leak detector ensures that the workpiece to be tested, together with the fixture, can move smoothly in a straight line in the sliding push groove. After determining the corresponding position, the workpiece is automatically positioned. The clamping fixture responsible for pushing the upper pallet and side sealing plate moves clamps and seals the workpiece and injects gas into it. After the inflation structure automatically inflates the workpiece, it is left to stand and the air pressure inside the workpiece is checked. If the air pressure drops beyond the threshold, it means that the leakage exceeds the standard. Then it is immersed in the lifting water tank to determine whether there is a surface leakage area on the workpiece. The leak point of the surface seal of this workpiece is investigated and whether it meets the standard.

[0019] 3) The existing technical problem of water tank operation easily interfering with the operation of tooling has been repaired. Through the operation of the workpiece fixture, the sliding table of the fixture slides in and out of the equipment and the rising and falling of the water tank will not interfere with each other, ensuring that the water tank will not be obstructed. During operation, the water tank does not interfere with the air tightness testing tooling. After the workpiece is moved into the water tank and positioned, the upper clamping component presses down to clamp the workpiece. The side sealing component seals the air inlet of the workpiece and injects compressed air into it to the specified pressure. The workpiece is measured by a high-precision leak detector. The amount of leakage within a certain time is used to determine whether the workpiece is leaking. The air tightness test of the automotive workpiece is automatically completed, thereby achieving the integrity test of the air tightness of the automotive battery box. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the pushing mechanism structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the workpiece support box structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the adaptable support mechanism structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the roller assembly structure of this utility model;

[0025] Figure 6 This is one of the schematic diagrams of the lifting cylinder structure of this utility model;

[0026] Figure 7 This is the second schematic diagram of the lifting cylinder structure of this utility model.

[0027] In the diagram: 1. Lower frame; 11. Workpiece support box; 12. Linear guide rail; 13. Workpiece; 14. Workpiece placement fixture plate; 15. Roller assembly; 16. Water receiving tank;

[0028] 2. Built-in pushing mechanism; 21. Workpiece clamping slide guide rail; 22. Workpiece clamping pulley block; 23. First clamping positioning block; 24. First workpiece clamping assembly; 25. Second clamping positioning block; 26. Lifting slide connecting assembly; 27. Extension cylinder assembly; 271. Alignment assembly; 28. Transfer and placement test chamber; 29. ​​Safety light curtain; 291. High-precision leak detector; 292. Touch screen; 293. Electrical switch; 294. Three-color light; 295. Upper frame;

[0029] 3. Pushing mechanism; 31. Lifting cylinder; 32. Cylinder seat; 33. Guide slide rod; 34. Cylinder; 35. Upper clamping plate lifting guide column; 36. Lower push guide column connecting plate; 37. Second workpiece upper clamping assembly; 38. Elastic buffer spring; 39. Lower support plate;

[0030] 4. Adaptive support mechanism; 41. Connection base; 42. Side sealing component support frame; 43. Side sealing component; 44. Workpiece anti-collision guide block; 45. Adjustable side plate;

[0031] 5. Lifting water tank mechanism; 51. Lifting water tank; 52. Connecting steel frame. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Please see Figure 1 - Figure 7A tooling for testing the air tightness of an automotive battery tray includes a lower frame 1, which includes a workpiece support box 11 for support. The surface of the workpiece support box 11 is provided with a linear guide rail 12 for automatically pushing the workpiece. The top of the linear guide rail 12 is provided with a workpiece placement fixture plate 14 for carrying the workpiece 13. The bottom sides of the workpiece placement fixture plate 14 are symmetrically provided with two sets of rollers 15 for sliding back and forth. The bottom of the two sets of rollers 15 is used to control the workpiece placement fixture plate 14 to push and insert into the testing end. The end of the rollers 15 is provided with a water receiving trough 16 for connection. The workpiece placement fixture plate 14 is also provided with a built-in pushing mechanism 2 for workpiece connection at the corresponding position.

[0034] The built-in pushing mechanism 2 consists of: workpiece clamp slide rail 21, workpiece clamp pulley group 22, first clamp placement positioning block 23 and lifting cylinder. The workpiece clamp slide rail 21 is symmetrically installed on both sides of the workpiece placement clamp plate 14. Lifting cylinders are provided on both sides of the bottom of the workpiece clamp pulley group 22. The first clamp placement positioning block 23 is installed on the side wall of the workpiece placement clamp plate 14.

[0035] The workpiece placement fixture plate 14 is pushed into place by the workpiece fixture slide rail 21 and the workpiece fixture pulley group 22 respectively. The top of the lifting cylinder extends and retracts to control the workpiece fixture slide rail 21 to rise and fall.

[0036] In this embodiment: the four corners of the workpiece placement fixture plate 14 are respectively provided with the first workpiece pressing assembly 24, and two independent second fixture placement positioning blocks 25 are connected to the side wall of the workpiece fixture pulley group 22. The side walls of the two second fixture placement positioning blocks 25 are also provided with lifting slide connecting assembly 26 for lifting and sliding.

[0037] The purpose of the first workpiece clamping assembly 24 and the second fixture placement positioning block 25 is to ensure that the workpiece 13 is placed more tightly on the workpiece placement fixture plate 14 to avoid dislocation. The workpiece 13 also has a positioning function.

[0038] In this embodiment: an extension cylinder assembly 27 for receiving the workpiece 13 is also installed at a position corresponding to the position of the workpiece fixture slide guide rail 21. The extension cylinder assembly 27 is connected to the transfer and placement test chamber 28 of the lifting slide connecting assembly 26. A safety light curtain 29 is assembled around the outside of the transfer and placement test chamber 28. A high-precision leak detector 291 is also assembled on one side of the safety light curtain 29. A touch screen 292 for feedback of air pressure difference data and equipment operation is attached to the top surface of the high-precision leak detector 291. Several electrical switches 293 for equipment operation are arranged sequentially on the bottom surface of the touch screen 292. A three-color light 294 for displaying the working status of the equipment is installed on the top side of the high-precision leak detector 291.

[0039] The safety light curtain 29 is used to protect workers, and the high-precision leak detector 291 makes the air pressure test inside the workpiece 13 more precise and accurate when performing the airtightness test on the workpiece 13.

[0040] In this embodiment: the surface of the safety light curtain 29 is covered by an upper frame 295, and a pushing mechanism 3 is distributed on the top surface of the upper frame 295. The pushing mechanism 3 consists of a lifting cylinder 31, a pressure cylinder seat 32, and a guide slide rod 33 for the linear movement of the guide cylinder.

[0041] The lifting cylinder 31 has a push cylinder 34 at its end for pushing, and the cylinder extension end of several push cylinders 34 has an upper clamp mounting plate. The bottom center of the lifting guide column 35 has a lower push guide column connecting plate 36 for support.

[0042] The pressure cylinder 34 and the upper clamp mounting plate lifting guide column 35 are used for two purposes: firstly, to clamp the workpiece 13 to prevent it from dislodging during the airtightness test; and secondly, to prepare for the workpiece 13 to float when placed in the water tank.

[0043] In this embodiment: a plurality of second workpiece pressing components 37 are arranged sequentially on the bottom surface of the lower push post connecting plate 36. The bottom center of the plurality of second workpiece pressing components 37 is provided with elastic buffer springs 38 for elastic buffering. The bottom center of the plurality of elastic buffer springs 38 is provided with lower support plates 39 for elastic buffering. The bottom two sides of the lower support plate 39 are respectively provided with adaptation support mechanisms 4.

[0044] The adapter support mechanism 4 includes an access base 41 installed on both sides of the side wall of the lower support plate 39. The surface of the access base 41 is provided with a side sealing component support frame 42 for support. A side sealing component 43 is installed on the top surface of the side sealing component support frame 42. A workpiece anti-collision guide block 44 is installed on the side wall of the side sealing component 43.

[0045] The side sealing assembly 43 and the workpiece anti-collision guide block 44 used ensure that the workpiece 13 is protected from airtight damage.

[0046] In this embodiment: the upper clamp mounting plate lifting guide column 35 is provided with adjustable side plates 45 for support on both sides, wherein the end of the side sealing component 43 is provided with an inflation structure for gas insertion. The inflation structure contains a pressure measuring unit and an analysis unit. The end of the side sealing component 43 is sealed and connected to the side wall of the workpiece 13 with the corresponding end. A cylinder push-pull connector is provided at the edge of the access base 41, and one end of the cylinder push-pull connector corresponds to the surface position of the corresponding access base 41.

[0047] The access base 41 and the adjusting side plate 45 are used to move the workpiece 13 back and forth between the access base 41 and the workpiece 13.

[0048] In this embodiment: a lifting water tank mechanism 5 is provided at the position corresponding to the lower push guide column connecting plate 36. The lifting water tank mechanism 5 includes a lifting water tank 51 placed at the bottom of the workpiece 13. The four corners of the bottom of the lifting water tank 51 are provided with connecting steel frames 52 for connection. One end of the connecting steel frame 52 is supported.

[0049] When the lifting water tank 51 is used as a reference point for the workpiece 13 to have a clear vent, the workpiece 13 is completely placed inside it, and the leaking port is observed and searched.

[0050] In this embodiment: the support height of the extension cylinder assembly 27 is higher than the discharge port height of the lifting water tank 51, and the transmission end of the extension cylinder assembly 27 can be retracted to the central area of ​​the lifting water tank 51. One side of the workpiece 13 is blocked by the alignment assembly 271, and the positioning block is also equipped with a positioning pin for positioning the workpiece 13.

[0051] By using the lifting and lowering of the water tank 51, the distance between the water tank 51 and the workpiece 13 can be flexibly controlled.

[0052] First step: Place the workpiece smoothly into the water tank without any obstructions for air tightness testing;

[0053] The first operation of the equipment is to place the workpiece 13 into the test chamber 28 that has been transferred and placed in, and extend the workpiece placement fixture plate 14. The machine automatically sets the extension cylinder assembly 27 to pull the workpiece placement fixture plate 14 together with the workpiece 13 into the upper part of the lifting water tank 51. In order to avoid obstruction, the workpiece fixture slide guide rail 21 then descends. At this time, the workpiece placement fixture plate 14 also descends and is locked into the fixture positioning block for positioning. Positioning is performed by the first fixture placement positioning block 23, and then the upper fixture descends and closes.

[0054] Step 2: Transfer to the transfer and placement test chamber 28 to avoid obstruction of the water tank;

[0055] The transfer process is as follows: the machine automatically controls two sets of extension cylinder assemblies 27. In this technology, the piston rods are installed facing each other so that when the cylinder length is the same, the piston stroke is extended twice in both directions. The cylinder assembly is slidable by the lifting slide connecting assembly 26 of the extension cylinder to ensure that the workpiece is moved out of the fixture plate 14 far enough. When it is retracted above the lifting water tank 51, the cylinder and the fixture plate are above the water tank and will not interfere with the water tank when it rises due to the excessive length of the cylinder.

[0056] After the extension cylinder assembly 27 drives the workpiece placement fixture plate 14 to retract above the water tank, the height of the lifting water tank 51 rising at this moment is exactly the same as the workpiece placement fixture plate 14, achieving the purpose of no interference.

[0057] Further details regarding the operational process:

[0058] When the workpiece 13 is pushed, the workpiece clamp pulley assembly 22 is relatively long. It slides from the workpiece placement clamp plate 14 to the top of the lifting slide connecting assembly 26 above the lifting water tank 51. At this time, there is a gap in the middle, which causes the water tank to be dislodged because it needs to be higher than the height of the workpiece when it rises. The pulley assembly is relatively long and can cross this gap.

[0059] After the workpiece placement fixture is moved directly above the lifting water tank 51, the workpiece fixture slide guide rail 21 is lowered by the lifting cylinder to place the workpiece placement fixture on the first fixture placement positioning block 23, and is positioned by the positioning pin on the positioning block.

[0060] The fixture positioning block has two positioning pins, so the workpiece placement fixture needs to be raised when it slides in to avoid the workpiece 13 hitting the positioning pins. At this time, when the workpiece fixture moves into the transfer and placement test chamber 28, the fixture descends and fits into each positioning pin, and the bottom surface contacts the fixture positioning block to ensure that the fixture positioning block plays a supporting and positioning role when it is suspended in the lower water tank. There is one fixture positioning block on each side, which together support and position the workpiece fixture.

[0061] Step 3: Testing is required;

[0062] Gas is introduced, and the side sealing assembly 43 and the side sealing assembly support frame 42 are clamped together. The high-precision leak detector 291 and the touch screen 292 are operated to set the first gas filling to detect the leakage of the ground component. After the gas is filled, the high-precision leak detector 291 is used to compare the data (if there is a difference in the threshold range, the machine itself will subtract the gas pressure difference to determine whether the leakage is within the normal range).

[0063] Workpiece 13 is moved directly above the lifting water tank 51 and positioned. The upper clamping assembly presses down to clamp the workpiece, and the side sealing assembly 43 seals the air inlet of the workpiece and injects compressed air into it to the specified pressure. If there is a leak, the lifting water tank 51 at the bottom is controlled by the lifting cylinder 31 in the specific pushing mechanism 3 to rise and immerse the workpiece. By inflating it below the water surface and fully immersing it, large bubbles will be found rising from below the water surface. The leak point can be found by looking at the point where the bubbles emerge and the workpiece can be repaired.

[0064] Small point: For the edge alignment of workpiece 13, the alignment component 271 and the second clamping positioning block 25 are used to ensure that the pushed workpiece 13 is always within a reasonable range, to avoid the workpiece 13 tipping over, to reduce the difficulty of manual handling and manual injection, and to ensure that the workpiece is unobstructed and is input into the lifting water tank 51 more smoothly and continuously.

[0065] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automobile battery tray airtightness detection tool, comprising a lower rack (1), characterized in that, The lower frame (1) includes a workpiece support box (11) for support. The surface of the workpiece support box (11) is provided with a linear guide rail (12) for automatically pushing the workpiece. The top of the linear guide rail (12) is provided with a workpiece placement fixture plate (14) for carrying the workpiece (13). The bottom sides of the workpiece placement fixture plate (14) are respectively provided with two sets of rollers (15) for sliding back and forth. The bottom of the two sets of rollers (15) serves as a control for pushing the workpiece placement fixture plate (14) towards the detection end. The end of the rollers (15) is provided with a water receiving trough (16) for connection. The workpiece placement fixture plate (14) is also provided with a built-in pushing mechanism (2) for connecting the workpiece at the corresponding position. The built-in pushing mechanism (2) consists of: workpiece fixture slide rail (21), workpiece fixture pulley group (22), first fixture placement positioning block (23) and lifting cylinder. The workpiece fixture slide rail (21) is symmetrically installed on both sides of the workpiece placement fixture plate (14). Lifting cylinders are provided on both sides of the bottom of the workpiece fixture pulley group (22). The first fixture placement positioning block (23) is installed on the side wall of the workpiece placement fixture plate (14). The workpiece placement fixture plate (14) is pushed into place by the workpiece fixture slide rail (21) and the workpiece fixture pulley group (22), respectively. The top extension and retraction of the cylinder body of the lifting cylinder controls the workpiece fixture slide rail (21) to move up and down.

2. The air tightness detection tool for an automobile battery tray according to claim 1, characterized in that: The workpiece placement fixture plate (14) is provided with a first workpiece pressing assembly (24) at each of the four corners of the plate surface. Two independent second fixture placement positioning blocks (25) are also connected to the side wall of the workpiece fixture pulley group (22). The side walls of the two second fixture placement positioning blocks (25) are also provided with a lifting slide connecting assembly (26) for lifting and sliding.

3. The automotive battery tray air tightness detection tool of claim 1, wherein: An extension cylinder assembly (27) for receiving the workpiece (13) is also installed at a position corresponding to the position of the workpiece fixture slide guide rail (21). The extension cylinder assembly (27) is connected to the transfer insertion test chamber (28) of the lifting slide connecting assembly (26). A safety light curtain (29) is assembled around the outside of the transfer insertion test chamber (28). A high-precision leak detector (291) is also assembled on one side of the safety light curtain (29). A touch screen (292) for feedback of air pressure difference data and equipment operation is attached to the top surface of the high-precision leak detector (291). Several electrical switches (293) for equipment operation are arranged sequentially on the bottom surface of the touch screen (292). A three-color light (294) for displaying the working status of the equipment is installed on the top side of the high-precision leak detector (291).

4. The automotive battery tray air tightness detection tool of claim 3, wherein: The surface of the safety light curtain (29) is covered by an upper frame (295), and a pushing mechanism (3) is distributed on the top surface of the upper frame (295). The pushing mechanism (3) consists of a lifting cylinder (31), a cylinder seat (32), and a guide slide (33) for the linear movement of the guiding cylinder. The lifting cylinder (31) is provided with a push cylinder (34) at its end, and the cylinder extension end of several cylinders (34) is provided with an upper clamp mounting plate. The bottom middle of the lifting guide column (35) is provided with a lower push guide column connecting plate (36) for support.

5. The automotive battery tray airtightness testing fixture according to claim 4, characterized in that: The bottom surface of the lower push-guide column connecting plate (36) is provided with a number of second workpiece pressing components (37) in sequence. The bottom center of the number of second workpiece pressing components (37) is provided with elastic buffer springs (38) for elastic buffering. The bottom center of the number of elastic buffer springs (38) is provided with lower support plates (39) for elastic buffering. The bottom two sides of the lower support plate (39) are respectively provided with matching support mechanisms (4). The adapter support mechanism (4) includes an access base (41) installed on both sides of the side wall of the lower support plate (39). The surface of the access base (41) is provided with a side sealing component support frame (42) for support. A side sealing component (43) is installed on the top surface of the side sealing component support frame (42). A workpiece anti-collision guide block (44) is installed on the side wall of the side sealing component (43).

6. The automotive battery tray air tightness detection tool of claim 5, wherein: The upper clamp mounting plate lifting guide column (35) is provided with adjustable side plates (45) for support on both sides. The end of the side sealing component (43) is provided with an inflation structure for gas insertion. The inflation structure contains a pressure measuring unit and an analysis unit. The end of the side sealing component (43) and the corresponding end are sealed and connected to the side wall of the workpiece (13). The edge of the access base (41) is provided with a cylinder push-pull connector. One end of the cylinder push-pull connector corresponds to the surface position of the corresponding access base (41).

7. The automotive battery tray air tightness detection tool of claim 4, wherein: A lifting water tank mechanism (5) is provided at the position corresponding to the lower push guide column connecting plate (36). The lifting water tank mechanism (5) includes a lifting water tank (51) placed at the bottom of the workpiece (13). The four corners of the bottom of the lifting water tank (51) are provided with connecting steel frames (52) for connection. One end of the connecting steel frame (52) is supported.

8. The automotive battery tray air tightness detection tool of claim 3, wherein: The support height of the extension cylinder assembly (27) is higher than the discharge port height of the lifting water tank (51), and the transmission end of the extension cylinder assembly (27) can be retracted to the central area of ​​the lifting water tank (51). One side of the workpiece (13) is blocked by the alignment assembly (271), and the positioning block is also equipped with a positioning pin for positioning the workpiece (13).

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