Air tightness detection device with marking function for automobile quick plug

Abstract

The invention discloses an air tightness detection device with a marking function for an automobile quick plug, and relates to the technical field of physical optical detection.The air tightness detection device comprises a machine table, a pair of protection supporting shells and a pair of racks, the pair of protection supporting shells are symmetrically arranged on the machine table, and the pair of racks are arranged in the pair of protection supporting shells respectively; a circulation mechanism is installed between the pair of racks, a detection mechanism is installed on the pair of protection supporting shells, two discharging sliding grooves are formed in the machine table, a common material sliding hopper and a defective material sliding hopper are installed in the two discharging sliding grooves respectively, a driving motor is further installed on the machine table and located on the outer side of one protection supporting shell, and a driving motor is installed on the driving motor. The driving motor is connected with the circulating mechanism, the optical sensor is used for objectively detecting marks, manual judgment which is prone to errors is replaced, and the accuracy of a judgment result is improved.

Description

Technical Field

[0001] This invention relates to the field of physical optics testing technology, specifically to an airtightness testing device for automotive quick plugs with marking function. Background Technology

[0002] In the electric vehicle manufacturing industry, the airtightness of fast charging plugs is a key indicator related to high-voltage safety and long-term reliability. Currently, production lines mostly use independent airtightness testing instruments for testing, and then use manual labor or another device to mark and sort out defective products. This separate operation mode has obvious drawbacks.

[0003] Firstly, the dispersed process leads to low production efficiency and prolonged production cycle. Secondly, manual judgment and marking are prone to missed detections, misjudgments, and confusion, resulting in high quality risks. Furthermore, the lack of immediate and indelible defect markings hinders quality traceability. Existing automatic marking devices (such as inkjet printers) require independent power sources and control systems, which are complex in structure, costly, and inconvenient to maintain. Therefore, the industry urgently needs an integrated device that can deeply integrate high-precision detection, immediate defect marking, and automatic sorting to achieve full-process automation, intelligence, and zero-error quality control. Summary of the Invention

[0004] The purpose of this invention is to provide an airtightness testing device for automotive quick plugs with marking function, so as to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an airtightness testing device for automotive quick plugs with marking function, comprising a machine base, a pair of protective support shells and a pair of frames, wherein the pair of protective support shells are symmetrically arranged on the machine base, the pair of frames are respectively arranged in the pair of protective support shells, a circulation mechanism is installed between the pair of frames, a testing mechanism is installed on the pair of protective support shells, two discharge chutes are provided on the machine base, and a general material hopper and a secondary material hopper are respectively installed in the two discharge chutes, and a drive motor is also installed on the machine base, wherein the drive motor is located outside one of the protective support shells and is connected to the circulation mechanism.

[0006] Furthermore, the circulation mechanism includes an active cable reel assembly and a driven cable reel assembly. The active cable reel assembly includes a drive shaft and two cable reels. The drive shaft is rotatably mounted on a pair of frames, and the two cable reels are symmetrically mounted at both ends of the drive shaft. Both cable reels are located in a protective support shell.

[0007] Furthermore, the structure and installation method of the driven cable tray assembly are the same as those of the active cable tray assembly. The drive motor is connected to the transmission shaft of the active cable tray assembly. Steel cables are connected to the cable trays on the same side of the active and driven cable tray assemblies. The two steel cables are respectively located in a pair of protective support shells. The electrical control signal causes the drive motor to rotate, which drives the active cable tray assembly to rotate. The two steel cables drive the driven cable tray assembly to rotate, and the two steel cables move at the same speed.

[0008] Furthermore, the circulation mechanism includes several inspection components, each of which includes a pair of support arms and a support platform. The pair of support arms are bolted to both sides of the support platform. The pair of support arms slide in contact with two frames respectively. The side of each support arm away from the support platform extends into the protective support shell. Each support arm is connected to a steel cable through a cable fastener. When the two steel cables move, the support arms move synchronously through the cable fastener. The support arms on both sides move the support platform. The several inspection components circulate along the outer contour of the frame with the steel cables.

[0009] Furthermore, each of the inspection components also includes a pair of V-clamps and a feeding pusher. The pair of V-clamps are symmetrically arranged on the platform, and the two V-clamps are slidably connected to the platform. A first spring is connected between each V-clamp and the platform. The longitudinal section of the feeding pusher is I-shaped, and the feeding pusher is slidably installed at the bottom of the platform. A second spring is connected between the feeding pusher and the bottom of the platform. When the operator inserts the quick plug to be inspected between the two V-clamps, the first spring applies a compressive force to the quick plug through the V-clamps, and the two V-clamps clamp the quick plug tightly. Even if the inspection component is in an inverted state, the quick plug will not fall off.

[0010] Furthermore, two crossbeams are connected between the pair of frames, and the two crossbeams are respectively located directly above the two discharge chutes. An electric push rod is installed upside down on each discharge chute, and the two electric push rods are connected to the control system through a circuit.

[0011] Furthermore, the detection mechanism includes a sliding column, a moving module, a lifting arm, an external air cylinder, and a narrow-tube piston. The moving module is installed in the sliding column and is connected to the control system circuit. The lifting arm is installed on the moving module, and the external air cylinder is installed at the end of the lifting arm. The narrow-tube piston is slidably installed in the external air cylinder. A sealing ring is provided at the bottom of the narrow-tube piston, and a third spring is provided between the narrow-tube piston and the external air cylinder. When the quick plug to be tested moves to directly below the narrow-tube piston along with the support platform, the circulation mechanism stops operating, the moving module descends in the sliding column, the lifting arm drives the external air cylinder to move downward, and the narrow-tube piston also moves downward until the narrow-tube piston contacts the quick plug. The sealing ring contacts the quick plug and forms a seal. The external air cylinder continues to descend, the narrow-tube piston remains stationary, the third spring is compressed, the air in the external air cylinder is in a compressed state, and the rubber baffle seals the balance hole to prevent air leakage.

[0012] Furthermore, the top of the external air cylinder has a balance hole, in which a one-way movable rubber baffle is installed. The narrow-tube piston has a constricted orifice, and a capillary orifice is also provided on the narrow-tube piston. The capillary orifice is connected to the narrowest point of the constricted orifice. A paint box is provided on the lifting arm, and a paint tube connects the paint box to the capillary orifice. If the quick-connect plug is intact, the air in the external air cylinder will not leak even if compressed. There is no airflow in the constricted orifice, and the tension generated by the capillary orifice on the paint prevents it from dripping. If the quick-connect plug is intact... The quick-connect plug cannot be sealed and has a leak. High-pressure air in the external air cylinder is ejected from the leak point after passing through the constricted orifice. The airflow velocity at the narrowest part of the constricted orifice is high, generating a strong negative pressure. The marking paint in the paint box is sucked out through the paint tube and capillary. As the high-speed airflow hits the quick-connect plug, it sprays markings on the defective plug. After marking is completed, the moving module drives the lifting arm to rise, and the third spring pushes the narrow tube piston to reset. The pressure in the external air cylinder decreases, and the rubber baffle is opened to prevent gas from flowing back through the constricted orifice and causing the paint to enter the external air cylinder.

[0013] Furthermore, the detection mechanism includes an arch frame and an optical sensor. The arch frame is positioned above a pair of protective support shells, and the optical sensor is located at the bottom center of the arch frame. The optical sensor is connected to the control system circuit. When the quick plug finishes detection, it passes through the bottom of the arch frame. The optical sensor detects whether there is any marking paint on the current quick plug and feeds the detection information back to two electric push rods. When the quick plug moves below the electric push rods, the electric push rods push the quick plug out by pushing the feeding push rod. Quick plugs with leakage are pushed into the secondary material hopper, while intact quick plugs are pushed into the general material hopper.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The system integrates three major functions—air tightness detection, defect identification, and automatic sorting—into a compact workstation. Through the linkage between the circulating production line and the control system, it achieves full automation from detection to sorting, greatly improving production efficiency and achieving a high degree of integration and automation.

[0016] 2. Utilizing the leaked gas itself, negative pressure is generated through the constricted orifice designed inside the cylinder piston rod using the Venturi effect (narrow tube effect), automatically drawing in the marking paint and spraying it onto the defective part. This marking method does not require an additional electric or pneumatic marking power source, has a simple structure and responds quickly, reducing marking costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall appearance and structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the internal structure of the machine tool of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the circulation mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram of the detection mechanism of the present invention;

[0022] Figure 6 This is a partial structural schematic diagram of the circulation mechanism of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the inspection component of the present invention.

[0024] In the diagram: 1. Machine base; 2. Discharge chute; 3. General material hopper; 4. Secondary material hopper; 5. Protective support shell; 6. Frame; 7. Arch frame; 8. Chute column; 9. Drive motor; 10. Crossbeam; 11. Electric actuator; 12. Optical sensor; 13. Active cable reel assembly; 14. Driven cable reel assembly; 15. Steel cable; 16. Inspection assembly; 17. Support arm; 18. Cable fastener; 19. Support platform; 20. V-clamp; 21. First spring; 22. Discharge push rod; 23. Second spring; 24. Moving module; 25. Lifting arm; 26. External air cylinder; 27. Narrow tube piston; 28. Third spring; 29. ​​Paint box; 30. Paint tube; 31. Capillary hole; 32. Balance hole; 33. Sealing ring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example: Figures 1-7 As shown, the present invention provides a technical solution: an airtightness testing device for automotive quick plugs with marking function, comprising a machine base 1, a pair of protective support shells 5, and a pair of frames 6. The pair of protective support shells 5 are symmetrically arranged on the machine base 1, and the pair of frames 6 are respectively arranged in the pair of protective support shells 5. A circulation mechanism is installed between the pair of frames 6. A testing mechanism is installed on the pair of protective support shells 5. Two discharge chutes 2 are provided on the machine base 1, and ordinary material hoppers 3 and secondary material hoppers 4 are respectively installed in the two discharge chutes 2. A drive motor 9 is also installed on the machine base 1. The drive motor 9 is located outside one of the protective support shells 5 and is connected to the circulation mechanism.

[0027] The circulation mechanism includes an active cable tray assembly 13 and a driven cable tray assembly 14. The active cable tray assembly 13 includes a drive shaft and two cable trays. The drive shaft is rotatably mounted on a pair of frames 6, and the two cable trays are symmetrically mounted at both ends of the drive shaft. Both cable trays are located in protective support shells 5. The structure and installation method of the driven cable tray assembly 14 are the same as those of the active cable tray assembly 13. The drive motor 9 is connected to the drive shaft of the active cable tray assembly 13. Steel cables 15 are connected to the cable trays on the same side of the active cable tray assembly 13 and the driven cable tray assembly 14. The two steel cables 15 are located in a pair of protective support shells 5 respectively. The electrical control signal causes the drive motor 9 to rotate, which drives the active cable tray assembly 13 to rotate. The two steel cables 15 drive the driven cable tray assembly 14 to rotate, and the two steel cables 15 move at the same speed.

[0028] The circulation mechanism includes several inspection components 16. Each inspection component 16 includes a pair of support arms 17 and a support platform 19. The pair of support arms 17 are bolted to both sides of the support platform 19. The pair of support arms 17 are in slidable contact with two frames 6 respectively. The side of each support arm 17 away from the support platform 19 extends into the protective support shell 5. Each support arm 17 is connected to a steel cable 15 via a cable fastener 18. Each inspection component 16 also includes a pair of V-clamps 20 and a discharge push rod 22. The pair of V-clamps 20 are symmetrically arranged on the support platform 19. The two V-clamps 20 are slidably connected to the support platform 19. A first spring 21 is connected between each V-clamp 20 and the support platform 19. The discharge push rod... The longitudinal section of 22 is I-shaped. The feeding push rod 22 is slidably installed at the bottom of the support platform 19. A second spring 23 is connected between the feeding push rod 22 and the bottom of the support platform 19. When the two steel cables 15 move, they drive the support arm 17 to move synchronously through the cable buckle 18. The support arms 17 on both sides drive the support platform 19 to move. Several inspection components 16 move cyclically along the outer contour of the frame 6 with the steel cables 15. The operator inserts the quick plug to be inspected between the two V-clamps 20. The first spring 21 applies a squeezing force to the quick plug through the V-clamps 20. The two V-clamps 20 clamp the quick plug tightly. Even if the inspection component 16 is in an upside-down state, the quick plug will not fall off.

[0029] The testing mechanism includes a slide column 8, a moving module 24, a lifting arm 25, an external air cylinder 26, and a narrow-tube piston 27. The moving module 24 is installed in the slide column 8 and is connected to the control system circuit. The lifting arm 25 is installed on the moving module 24. The external air cylinder 26 is installed at the end of the lifting arm 25. The narrow-tube piston 27 is slidably installed in the external air cylinder 26. A sealing ring 33 is provided at the bottom of the narrow-tube piston 27. A third spring 28 is provided between the narrow-tube piston 27 and the external air cylinder 26. A balance hole 32 is provided at the top of the external air cylinder 26. A one-way movable rubber baffle (not shown in the figure) is provided in the balance hole 32. A necking fine hole is provided in the narrow-tube piston 27, and a capillary hole is also provided on the narrow-tube piston 27. 31. The capillary pore 31 is connected to the narrowest part of the constricted pore. A paint box 29 is provided on the lifting arm 25. A paint tube 30 is connected between the paint box 29 and the capillary pore 31. When the quick plug to be tested moves to the underside of the narrow tube piston 27 along with the support platform 19, the circulation mechanism stops operating. The moving module 24 descends in the slide column 8. The lifting arm 25 drives the external air cylinder 26 to move downward. The narrow tube piston 27 also moves downward until the narrow tube piston 27 contacts the quick plug. The sealing ring 33 contacts the quick plug and forms a seal. The external air cylinder 26 continues to descend. The narrow tube piston 27 remains stationary. The third spring 28 is compressed. The air in the external air cylinder 26 is in a compressed state. The rubber baffle seals the balance hole 32 to prevent air leakage.

[0030] If the quick-connect plug is intact, the air in the external air cylinder 26 will not leak even if it is compressed. There is no airflow in the constricted orifice, and the tension generated by the capillary pore 31 on the paint prevents it from dripping. If the quick-connect plug cannot be sealed and there is a leak, the high-pressure air in the external air cylinder 26 will be ejected from the leak point after passing through the constricted orifice. The airflow velocity at the narrowest part of the constricted orifice is high, generating a strong negative pressure. The marking paint in the paint box 29 is sucked out through the paint tube 30 and the capillary pore 31. As the high-speed airflow hits the quick-connect plug, it sprays markings on the defective plug. After marking is completed, the moving module 24 drives the lifting arm 25 to rise, the third spring 28 pushes the narrow tube piston 27 to reset, the pressure in the external air cylinder 26 decreases, and the rubber baffle is opened to prevent gas from flowing back from the constricted orifice and causing the paint to enter the external air cylinder 26.

[0031] The detection mechanism includes an arch frame 7 and an optical sensor 12. The arch frame 7 is positioned above a pair of protective support shells 5, and the optical sensor 12 is located at the bottom center of the arch frame 7. The optical sensor 12 is connected to the control system circuit. Two crossbeams 10 are connected between a pair of frames 6. The two crossbeams 10 are located directly above two discharge chutes 2. An electric push rod 11 is installed upside down on each discharge chute 2. The two electric push rods 11 are connected to the control system through a circuit. When the quick plug finishes detection, it passes through the bottom of the arch frame 7. The optical sensor 12 detects whether there is any marking paint on the current quick plug and feeds back the detection information to the two electric push rods 11. When the quick plug moves below the electric push rod 11, the electric push rod 11 pushes the quick plug out by pushing the discharge push rod 22. Quick plugs with leakage are pushed into the secondary material chute 4, while intact quick plugs are pushed into the general material chute 3.

[0032] The working principle of this invention is as follows: The electrical control signal causes the drive motor 9 to rotate, which in turn drives the active cable tray assembly 13 to rotate. The two steel cables 15 drive the driven cable tray assembly 14 to rotate. The two steel cables 15 move at the same speed. When the two steel cables 15 move, they drive the support arms 17 to move synchronously through the cable buckle 18. The support arms 17 on both sides drive the support platform 19 to move. Several inspection components 16 move cyclically along the outer contour of the frame 6 with the steel cables 15. The operator inserts the quick plug to be inspected between the two V-clamps 20. The first spring 21 applies a squeezing force to the quick plug through the V-clamps 20. The two V-clamps 20 clamp the quick plug tightly, so that the quick plug will not fall off even if the inspection components 16 are in an upside-down state.

[0033] When the quick plug to be tested moves to the position directly below the narrow tube piston 27 along with the support platform 19, the circulation mechanism stops operating, the moving module 24 descends in the slide column 8, the lifting arm 25 drives the external air cylinder 26 to move downward, and the narrow tube piston 27 also moves downward until the narrow tube piston 27 contacts the quick plug, the sealing ring 33 contacts the quick plug and forms a seal, the external air cylinder 26 continues to descend, the narrow tube piston 27 remains stationary, the third spring 28 is compressed, the air in the external air cylinder 26 is in a compressed state, and the rubber baffle seals the balance hole 32 to prevent air leakage.

[0034] If the quick-connect plug is intact, the air in the external air cylinder 26 will not leak even if it is compressed. There is no airflow in the constricted orifice, and the tension generated by the capillary pore 31 on the paint prevents it from dripping. If the quick-connect plug cannot be sealed and there is a leak, the high-pressure air in the external air cylinder 26 will be ejected from the leak point after passing through the constricted orifice. The airflow velocity at the narrowest part of the constricted orifice is high, generating a strong negative pressure. The marking paint in the paint box 29 is sucked out through the paint tube 30 and the capillary pore 31. As the high-speed airflow hits the quick-connect plug, it sprays markings on the defective plug. After marking is completed, the moving module 24 drives the lifting arm 25 to rise, the third spring 28 pushes the narrow tube piston 27 to reset, the pressure in the external air cylinder 26 decreases, and the rubber baffle is opened to prevent gas from flowing back from the constricted orifice and causing the paint to enter the external air cylinder 26.

[0035] After the quick plug finishes testing, it passes through the bottom of the arch frame 7. The optical sensor 12 detects whether there is any marking paint on the current quick plug and feeds the detection information back to the two electric push rods 11. When the quick plug moves below the electric push rods 11, the electric push rods 11 push the quick plug out by pushing the feeding push rod 22. The quick plug with leakage is pushed into the secondary material hopper 4, while the intact quick plug is pushed into the general material hopper 3.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas tightness testing device for automotive quick-connect plugs with marking function, characterized in that: The machine includes a machine base (1), a pair of protective support shells (5) and a pair of machine frames (6). The pair of protective support shells (5) are symmetrically arranged on the machine base (1). The pair of machine frames (6) are respectively arranged in the pair of protective support shells (5). A circulation mechanism is installed between the pair of machine frames (6). A detection mechanism is installed on the pair of protective support shells (5). Two discharge chutes (2) are opened on the machine base (1). A general material chute (3) and a secondary material chute (4) are respectively installed in the two discharge chutes (2). A drive motor (9) is also installed on the machine base (1). The drive motor (9) is located outside one of the protective support shells (5). The drive motor (9) is connected to the circulation mechanism.

2. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 1, characterized in that: The circulation mechanism includes an active cable disc assembly (13) and a driven cable disc assembly (14). The active cable disc assembly (13) includes a drive shaft and two cable discs. The drive shaft is rotatably mounted on a pair of frames (6). The two cable discs are symmetrically mounted at both ends of the drive shaft. Both cable discs are located in the protective support shell (5).

3. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 2, characterized in that: The structure and installation method of the driven cable disc assembly (14) are the same as those of the active cable disc assembly (13). The drive motor (9) is connected to the transmission shaft of the active cable disc assembly (13). The active cable disc assembly (13) and the driven cable disc assembly (14) are connected to steel cables (15) on the same side of the cable disc. The two steel cables (15) are respectively located in a pair of protective support shells (5).

4. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 3, characterized in that: The circulation mechanism includes several tray assembly (16), each tray assembly (16) includes a pair of tray arms (17) and a tray platform (19). The pair of tray arms (17) are bolted to both sides of the tray platform (19). The pair of tray arms (17) slide in contact with two frames (6) respectively. The side of each tray arm (17) away from the tray platform (19) extends into the protective support shell (5). Each tray arm (17) is connected to a steel cable (15) through a cable buckle (18).

5. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 4, characterized in that: Each of the tray assembly (16) further includes a pair of V-clamps (20) and a feeding push rod (22). The pair of V-clamps (20) are symmetrically arranged on the tray (19). The two V-clamps (20) are slidably connected to the tray (19). A first spring (21) is connected between each V-clamp (20) and the tray (19). The longitudinal section of the feeding push rod (22) is I-shaped. The feeding push rod (22) is slidably installed at the bottom of the tray (19). A second spring (23) is connected between the feeding push rod (22) and the bottom of the tray (19).

6. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 2, characterized in that: Two crossbeams (10) are connected between a pair of frames (6). The two crossbeams (10) are located directly above the two discharge chutes (2). An electric push rod (11) is installed upside down on each discharge chute (2). The two electric push rods (11) are connected to the control system through a circuit.

7. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 1, characterized in that: The detection mechanism includes a chute column (8), a moving module (24), a lifting arm (25), an external air cylinder (26), and a narrow-tube piston (27). The moving module (24) is installed in the chute column (8) and is connected to the control system circuit. The lifting arm (25) is installed on the moving module (24). The external air cylinder (26) is installed at the end of the lifting arm (25). The narrow-tube piston (27) is slidably installed in the external air cylinder (26). A sealing ring (33) is provided at the bottom of the narrow-tube piston (27). A third spring (28) is provided between the narrow-tube piston (27) and the external air cylinder (26).

8. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 7, characterized in that: The top of the external air cylinder (26) is provided with a balance hole (32), and a one-way movable rubber baffle is provided in the balance hole (32). The narrow tube piston (27) is provided with a constricted fine hole, and a capillary hole (31) is also provided on the narrow tube piston (27). The capillary hole (31) is connected to the narrowest part of the constricted fine hole. A paint box (29) is provided on the lifting arm (25), and a paint tube (30) is connected between the paint box (29) and the capillary hole (31).

9. The airtightness testing device for automotive quick-connect plugs with marking function according to claim 1, characterized in that: The detection mechanism includes an arch frame (7) and an optical sensor (12). The arch frame (7) is positioned above a pair of protective support shells (5), and the optical sensor (12) is positioned at the bottom center of the arch frame (7). The optical sensor (12) is connected to the control system circuit.

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