Workpiece fitting air tightness testing tool

Abstract

The invention belongs to the technical field of pressure testing devices, and discloses a workpiece fitting air tightness testing tool which comprises a base, a fitting table is fixedly mounted in the base, a lifting fixing device is arranged in the fitting table, a threaded ejector rod is arranged at the top of the base, a testing piece is in threaded connection with the threaded ejector rod, and the testing piece is in threaded connection with the lifting fixing device. And one side of the base is communicated with a pressure gauge. The automatic opening and closing dust collection device utilizes the fixing sleeve and the dust collection sleeve to perform dust collection and cleaning on the test piece and the laminating table, then the motor drives the screw rod to rotate to prevent the dust collection sleeve from influencing descending of the test piece, and finally the transmission piece and the lifting assembly drive the test piece to ascend and then descend to a specified height, so that the test piece is laminated with the laminating table. The problem of pressure gauge reading fluctuation caused by impurities is effectively avoided, automatic linkage of cleaning positioning and attaching is achieved, manual intervention is not needed, the detection precision is improved, and the risk of misjudgment of qualified products is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of pressure testing devices, specifically a workpiece fit airtightness testing fixture. Background Technology

[0002] In the manufacturing process of cylindrical parts, the sealing performance of their tapered surfaces directly affects the overall reliability of the product. Therefore, after processing, the airtightness pressure of the tapered surfaces must be strictly tested by a bonding test device. This type of test device usually fixes the cylindrical parts to the test end through a threaded connection, and then uses an oil circuit to drive the test end to lift and lower to achieve tight bonding between the parts and the bonding seat. Finally, the change of the air pressure gauge is observed through the air circuit to determine whether the seal meets the standard. At the same time, in some scenarios, the height difference of the parts also needs to be measured simultaneously to ensure assembly accuracy. This is a key link to ensure the quality of cylindrical parts leaving the factory.

[0003] Currently available bonding testing devices typically involve directly fixing the cylindrical part with threads and then activating the hydraulic system to tighten it for bonding testing. This process lacks automatic cleaning of the tapered surface of the cylindrical part and the bonding surface of the bonding seat. Since the surface of the cylindrical part is prone to residual cutting debris, dust, and other impurities after processing, and the bonding seat may also accumulate contaminants after long-term use, these impurities can prevent the part from completely and tightly bonding with the tapered surface of the bonding seat. This can lead to problems such as fluctuations in the pressure gauge reading and misjudgment of sealing performance during air circuit testing, affecting the accuracy and reliability of the test results. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a workpiece fit airtightness testing fixture.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a workpiece bonding airtightness testing fixture, comprising a base, a bonding platform fixedly installed inside the base, a lifting and fixing device disposed inside the bonding platform, a threaded push rod disposed on the top of the base, a test piece threadedly connected to the threaded push rod, a pressure gauge connected to one side of the base, and further comprising: The anti-mistest cleaning component is mounted on the base and is used to automatically clean the bonding platform and test pieces; The anti-misdetection cleaning component includes a base plate fixedly connected to the base, a motor fixedly connected to one side of the base plate, a screw fixedly connected to the output end of the motor, a transmission component on the screw, a lifting assembly connected to the transmission component inside the base, a fixed sleeve connected to the transmission component on the bonding platform, a toothed sleeve slidably connected inside the fixed sleeve, a dust suction sleeve connected to both the top and bottom of the toothed sleeve, and a self-opening and closing dust suction device at the bottom of the fixed sleeve. A rotation control component, located at the bottom of the fixed sleeve, is used for automatic rotation control of the gear sleeve.

[0006] In the above technical solution, preferably, the transmission component includes a toothed sleeve plate threaded onto a screw, a slide rod slidably connected inside the toothed sleeve plate, a square sleeve fixedly connected to one side of the slide rod, a toothed rod movably connected inside the square sleeve via a bearing, and the top of the toothed rod fixedly connected to a fixed sleeve via a connecting plate. A limiting sleeve is fitted onto the square sleeve, and the limiting sleeve is fitted onto the first toothed rod. A stop sleeve is fixedly connected to the base plate, one side of which contacts the square sleeve. A toothed plate that meshes with the first toothed rod is fixedly connected to the stop sleeve.

[0007] In the above technical solution, preferably, the lifting assembly includes a second toothed rod that is movably connected inside the base plate via a bearing seat. The second toothed rod meshes with a toothed sleeve plate. A turntable is fixedly connected to the second toothed rod, and a rotating plate is hinged to one side of the turntable via a shaft. A trapezoidal plate is hinged to one side of the rotating plate via a shaft. A trapezoidal sleeve is fitted onto the trapezoidal plate. The bottom of the trapezoidal sleeve is fixedly connected to the base plate. A support sleeve is fixedly connected to one side of the trapezoidal plate. The support sleeve is fitted onto the test piece. An infrared sensor switch is fixedly connected to the support sleeve.

[0008] In the above technical solution, preferably, the self-opening and closing dust collection device includes a jog switch fixedly connected inside the fixed sleeve, a circular sleeve is connected to the bottom of the fixed sleeve, a filter cylinder is threadedly connected inside the circular sleeve, and a fan is threadedly connected to the bottom of the circular sleeve.

[0009] In the above technical solution, preferably, the rotation control component includes a motor fixedly connected to the bottom of the fixed sleeve, the output end of the motor extends into the interior of the fixed sleeve and is fixedly connected to a gear, the gear meshes with the gear sleeve, and a sponge pad is fixedly connected to the dust collection sleeve.

[0010] In the above technical solution, preferably, a positioning sleeve is fixedly connected to one side of the base plate, and the positioning sleeve is sleeved on the screw.

[0011] In the above technical solution, preferably, two guide plates are symmetrically fixedly connected to the base plate, and the side of the guide plate near the toothed sleeve plate is in contact with the surface of the toothed sleeve plate.

[0012] In the above technical solution, preferably, the inside of the retaining sleeve is provided with an elastic reset member. The elastic reset member includes two anti-rotation rods fixedly connected to one side of the limiting sleeve. The retaining sleeve is fitted on the anti-rotation rods. A disc in contact with the retaining sleeve is fixedly connected to one side of the anti-rotation rod. A spring is fitted on the anti-rotation rod. One end of the spring is fixedly connected to the limiting sleeve, and the other end of the spring is fixedly connected to the inside of the retaining sleeve.

[0013] In the above technical solution, preferably, a protective plate is fixedly connected to one side of the base, and both the bottom plate and one side of the trapezoidal sleeve are fixedly connected to the protective plate.

[0014] In the above technical solution, preferably, a top sleeve is fixedly connected to one side of the retaining sleeve, the top sleeve is fitted onto the limiting sleeve, and the bottom of the limiting sleeve is in contact with the inner wall of the retaining sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a self-closing vacuuming device with a fixed sleeve and a vacuum sleeve to clean the test piece and bonding platform. A motor drives a screw to rotate, which, through a transmission assembly, raises and rotates the fixed sleeve, preventing the vacuum sleeve from affecting the descent of the test piece. Finally, a transmission and lifting assembly raises and lowers the test piece to a designated height, allowing it to bond with the bonding platform. Simultaneously, a threaded push rod engages with the lifting and fixing device, effectively preventing pressure gauge reading fluctuations caused by impurities. This achieves automated linkage between cleaning, positioning, and bonding, eliminating the need for manual intervention, improving testing accuracy, effectively reducing the risk of misjudging qualified products, and ensuring stable and reliable test results.

[0016] Furthermore, while the toothed sleeve can vacuum the mating surface, it lacks independent rotational power, resulting in a small vacuuming range, low cleaning power, and easy residue of impurities, making it difficult to achieve comprehensive deep cleaning. However, through the design of the motor, gears, and sponge pads in the rotation control components, the motor can drive the toothed sleeve to rotate inside the fixed sleeve via the gears, causing the sponge pad on the vacuum sleeve to actively rotate and wipe. The friction between the sponge pad and the mating surface thoroughly removes residual impurities. At the same time, in conjunction with the suction of the vacuum sleeve, it significantly improves the thoroughness of cleaning, ensures that there are no impurities interfering with the test piece and the mating platform, guarantees the accuracy of mating, and further avoids misjudgment of pressure detection.

[0017] Furthermore, the lack of elastic buffering between the limiting sleeve and the retaining sleeve leads to inaccurate resetting, which can easily cause the fixed sleeve and toothed sleeve to shift positions, affecting the cleaning coverage. However, through the structural design of the anti-rotation rod, disc, and spring in the elastic resetting component, when the transmission component drives the square sleeve and the limiting sleeve to reset, the spring's rebound force can drive the limiting sleeve to reset precisely, ensuring that the fixed sleeve and toothed sleeve return to their initial working positions. The disc acts as a limit to prevent over-resetting, while the anti-rotation rod ensures a smooth and non-shifting resetting process, further improving the cleaning effect and ensuring stable and reliable pressure test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the base of the present invention; Figure 3 This is a schematic diagram of the trapezoidal sleeve of the present invention; Figure 4This is a cross-sectional schematic diagram of the fixing sleeve of the present invention; Figure 5 This is a schematic diagram of the structure of the toothed rod of the present invention; Figure 6 This is a schematic diagram of the structure of the limiting sleeve of the present invention; Figure 7 This is a schematic diagram of the structure of the turntable of the present invention; Figure 8 This is a schematic diagram of the structure of the fixed sleeve after it has been raised according to the present invention; Figure 9 This is a schematic diagram of the structure of the retainer of the present invention.

[0019] In the diagram: 1. Base; 2. Fitting platform; 3. Lifting and fixing device; 4. Threaded top rod; 5. Test piece; 6. Pressure gauge; 7. Anti-mistest cleaning component; 71. Base plate; 72. Motor; 73. Screw; 74. Transmission component; 741. Geared sleeve plate; 742. Slide rod; 743. Square sleeve; 744. Gear rod one; 745. Limiting sleeve; 746. Stop sleeve; 747. Gear plate; 75. Lifting assembly; 751. Gear rod two; 752. Turntable; 753. Turning plate; 754. Trapezoidal plate; 755 756. Trapezoidal sleeve; 757. Support sleeve; 758. Infrared sensor switch; 79. Fixed sleeve; 70. Toothed sleeve; 71. Dust collection sleeve; 72. Self-opening and closing dust collection device; 73. Jog switch; 74. Circular sleeve; 759. Filter cartridge; 750. Fan; 8. Rotation control component; 81. Motor; 82. Gear; 83. Sponge pad; 9. Positioning sleeve; 10. Guide plate; 11. Elastic reset component; 112. Anti-rotation rod; 113. Disc; 114. Spring; 12. Protective plate; 13. Top sleeve. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, the present invention provides a workpiece bonding airtightness testing fixture, including a base 1, a bonding platform 2 fixedly installed inside the base 1, a lifting and fixing device 3 disposed inside the bonding platform 2, a threaded push rod 4 disposed on the top of the base 1, a test piece 5 threadedly connected to the threaded push rod 4, a pressure gauge 6 connected to one side of the base 1, and further including: The anti-mistest cleaning component 7 is installed on the base 1 and is used to automatically clean the bonding table 2 and the test piece 5. The anti-misdetection cleaning component 7 includes a base plate 71 fixedly connected to the base 1. A motor 72 is fixedly connected to one side of the base plate 71. A screw 73 is fixedly connected to the output end of the motor 72. A transmission component 74 is provided on the screw 73. A lifting component 75 connected to the transmission component 74 is provided inside the base 1. A fixing sleeve 76 connected to the transmission component 74 is provided on the bonding platform 2. A toothed sleeve 77 is slidably connected inside the fixing sleeve 76. A vacuum sleeve 78 is connected to both the top and bottom of the toothed sleeve 77. A self-opening and closing vacuuming device 79 is provided at the bottom of the fixing sleeve 76. The rotation control component 8 is located at the bottom of the fixed sleeve 76 and is used to automatically control the rotation of the gear sleeve 77.

[0022] Specifically, one side of the base 1 is equipped with oil passage one, and the other side of the base 1 is equipped with oil passage two. One side of the base 1 is connected to pressure gauge 6 through air passage and connecting pipe; pressure gauge 6 is a gas pressure gauge; the lifting and fixing device 3 is composed of lifting seat, elastic support seat, ball and annular groove, etc.; when the threaded top rod 4 is inserted into the lifting seat of the lifting and fixing device 3, oil is injected through oil passage one to realize the lowering of the lifting seat. The lifting seat drives the ball to move down. Since the annular groove guides the ball, the ball can fit against the threaded top rod 4 and pull the threaded top rod 4 downward. The threaded top rod 4 drives the test piece 5 to fit against the fitting platform 2. Then, the air passage is used to detect the change of pressure gauge 6 to detect the sealing condition and realize the detection of the tapered surface fitting condition. If it meets the requirements, the test piece 5 is a compliant product; if it does not meet the requirements, it is non-compliant. After the test is completed, oil is injected through oil passage two to realize the raising of the lifting seat, the test piece 5 is removed, and the threaded top rod 4 is installed inside another test piece 5 for testing again.

[0023] like Figures 6 to 9 As shown, the transmission component 74 includes a toothed sleeve plate 741 threadedly connected to the screw 73, a slide rod 742 slidably connected inside the toothed sleeve plate 741, a square sleeve 743 fixedly connected to one side of the slide rod 742, a toothed rod 744 movably connected inside the square sleeve 743 via a bearing, and the top of the toothed rod 744 fixedly connected to the fixed sleeve 76 via a connecting plate. A limiting sleeve 745 is fitted on the square sleeve 743. The limiting sleeve 745 is fitted on the toothed rod 744. A retaining sleeve 746 is fixedly connected to the base plate 71. One side of the retaining sleeve 746 contacts the square sleeve 743. A toothed plate 747 that meshes with the toothed rod 744 is fixedly connected to the retaining sleeve 746.

[0024] Specifically, the toothed sleeve plate 741 has a U-shaped inclined groove for the sliding rod 742 to slide, and the bottom of the toothed sleeve plate 741 is provided with teeth that mesh with the second toothed rod 751. The bottom of the teeth contacts the top of the base plate 71 to improve the stability of the toothed sleeve plate 741. The limiting sleeve 745 can limit and guide the square sleeve 743, so that the square sleeve 743 and the sliding rod 742 can move up and down smoothly, thereby driving the first toothed rod 744 to rise and fall.

[0025] like Figures 3 to 6 As shown, the lifting assembly 75 includes a second gear 751 that is movably connected to the inside of the base plate 71 via a bearing seat. The second gear 751 meshes with a toothed sleeve plate 741. A turntable 752 is fixedly connected to the second gear 751. A rotating plate 753 is hinged to one side of the turntable 752 via a shaft. A trapezoidal plate 754 is hinged to one side of the rotating plate 753 via a shaft. A trapezoidal sleeve 755 is fitted on the trapezoidal plate 754. The bottom of the trapezoidal sleeve 755 is fixedly connected to the base plate 71. A support sleeve 756 is fixedly connected to one side of the trapezoidal plate 754. The support sleeve 756 is fitted on the test piece 5. An infrared sensor switch 757 is fixedly connected to the support sleeve 756.

[0026] Specifically, the infrared sensor switch 757 is electrically connected to the motor 72 via an external time-delay relay. After the infrared sensor switch 757 detects an object, the time-delay relay starts the motor 72 after a delay to ensure that the fan 794 has enough time to clean the dust. The motor 72 runs for a period of time and then shuts down, realizing automated control of the motor 72's start and stop. A control button for controlling the motor 72 to reverse and reset is fixedly installed on the base plate 71. After the gas pressure test is completed, the motor 72 can be controlled and reset via the control button.

[0027] like Figures 2 to 4 As shown, the self-closing vacuum cleaner 79 includes a jog switch 791 fixedly connected inside the fixed sleeve 76, a circular sleeve 792 connected to the bottom of the fixed sleeve 76, a filter cartridge 793 threadedly connected inside the circular sleeve 792, and a fan 794 threadedly connected to the bottom of the circular sleeve 792.

[0028] Specifically, the jog switch 791 is electrically connected to the fan 794 and the motor 81. The fan 794 is a silent fan. During use, the test piece 5 is placed in the support sleeve 756. The test piece 5 will press the jog switch 791 by its own weight, and the jog switch 791 will start the fan 794 and the motor 81. The fan 794 draws air into the interior of the fixed sleeve 76 through the filter cartridge 793, and the fixed sleeve 76 absorbs and filters dust through the dust suction sleeve 78. When the fixed sleeve 76 rotates, the jog switch 791 will reset as the test piece 5 moves away from the jog switch 791, and the fan 794 and the motor 81 will be turned off, which saves energy and avoids ineffective operation.

[0029] like Figures 2 to 4 As shown, the rotation control component 8 includes a motor 81 fixedly connected to the bottom of the fixed sleeve 76. The output end of the motor 81 extends into the interior of the fixed sleeve 76 and is fixedly connected to a gear 82. The gear 82 meshes with the gear sleeve 77. A sponge pad 83 is fixedly connected to the dust collection sleeve 78.

[0030] Specifically, the motor 81 can drive the gear sleeve 77 to rotate inside the fixed sleeve 76 through the gear 82, so that the sponge pad 83 on the dust collection sleeve 78 can actively rotate and wipe, and thoroughly remove residual impurities through the friction between the sponge pad 83 and the bonding surface; at the same time, it works in conjunction with the adsorption of the dust collection sleeve 78 to greatly improve the thoroughness of cleaning, ensure that there are no impurities interfering with the test piece 5 and the bonding table 2, ensure the bonding accuracy, and further avoid misjudgment of pressure detection.

[0031] like Figure 5 As shown, a positioning sleeve 9 is fixedly connected to one side of the base plate 71, and the positioning sleeve 9 is sleeved on the screw 73.

[0032] Specifically, the positioning sleeve 9 can effectively limit the radial offset and wobble of the screw 73 when it rotates, ensuring the coaxiality and stability of the screw 73 driven by the motor 72, and avoiding the problem of misalignment of the cleaning action due to the offset of the screw 73.

[0033] like Figure 2 and Figure 6 As shown, two guide plates 10 are symmetrically fixedly connected to the base plate 71. The side of the guide plate 10 near the toothed sleeve plate 741 is in contact with the surface of the toothed sleeve plate 741.

[0034] Specifically, the symmetrically arranged guide plates 10 can limit the movement trajectory of the toothed sleeve plate 741, prevent deviation or tilting during transmission, and ensure that the toothed sleeve plate 741 slides smoothly along a straight line.

[0035] like Figures 3 to 6 As shown, the retaining sleeve 746 has an elastic reset member 11 inside. The elastic reset member 11 includes two anti-rotation rods 111 fixedly connected to one side of the limiting sleeve 745. The retaining sleeve 746 is sleeved on the anti-rotation rods 111. A disc 112 that contacts the retaining sleeve 746 is fixedly connected to one side of the anti-rotation rod 111. A spring 113 is sleeved on the anti-rotation rod 111. One end of the spring 113 is fixedly connected to the limiting sleeve 745, and the other end of the spring 113 is fixedly connected to the inside of the retaining sleeve 746.

[0036] Specifically, when the transmission component 74 drives the square sleeve 743 and the limiting sleeve 745 to reset, the rebound force of the spring 113 can drive the limiting sleeve 745 to reset precisely, ensuring that the fixed sleeve 76 and the toothed sleeve 77 return to their initial working positions. The disc 112 plays a limiting role to avoid over-reset, while the anti-rotation rod 111 ensures that the reset process is smooth and without deviation, further improving the cleaning effect and ensuring that the pressure test results are stable and reliable.

[0037] like Figure 1 As shown, a protective plate 12 is fixedly connected to one side of the base 1, and one side of the base plate 71 and the trapezoidal sleeve 755 are both fixedly connected to the protective plate 12.

[0038] Specifically, the protective plate 12 can provide rigid support for the base plate 71 and the trapezoidal sleeve 755, preventing them from loosening or shaking, while also increasing the support strength of the base plate 71 and preventing breakage at the connection between the trapezoidal sleeve 755 and the base plate 71.

[0039] like Figure 5 and Figure 9 As shown, a top sleeve 13 is fixedly connected to one side of the retaining sleeve 746. The top sleeve 13 is fitted onto the limiting sleeve 745, and the bottom of the limiting sleeve 745 is in contact with the inner wall of the retaining sleeve 746.

[0040] Specifically, the top sleeve 13 can cooperate with the stop sleeve 746 to limit and guide the limiting sleeve 745, improve the stability of the limiting sleeve 745 when moving, and prevent the limiting sleeve 745 from deviating or tilting when moving.

[0041] Working principle and usage process of this invention: When in use, the test piece 5 to be tested is connected to the threaded top rod 4 by thread, and then the test piece 5 is placed in the support sleeve 756. The test piece 5 presses the jog switch 791 inside the fixing sleeve 76 by its own weight. The jog switch 791 simultaneously starts the fan 794 and the motor 81, and the cleaning process is started automatically. Motor 81 drives gear sleeve 77 to rotate inside fixed sleeve 76 via gear 82, thereby causing dust suction sleeve 78 and sponge pad 83 on gear sleeve 77 to rotate synchronously; at the same time, fan 794 draws air through round sleeve 792, creating negative pressure inside fixed sleeve 76. Dust suction sleeve 78 adsorbs debris, dust and other impurities from the tapered surface of test piece 5 and the surface of bonding platform 2. The rotating sponge pad 83 further removes residual impurities through friction. Impurities are intercepted and filtered by filter cartridge 793 to avoid secondary pollution. After the infrared sensor switch 757 detects the test piece 5, it delays and starts the motor 72 through the time delay relay. The motor 72 drives the screw 73 to rotate. The screw 73 drives the toothed sleeve plate 741 to slide smoothly. On the one hand, the toothed sleeve plate 741 drives the toothed rod 744 to move upward through the slide rod 742 and the square sleeve 743, so that the dust collection sleeve 78 is away from the bonding table 2. After the toothed rod 744 moves to the specified height, the toothed sleeve plate 741 will push the square sleeve 743 and the toothed rod 744 through the slide rod 742. Since the toothed rod 744 meshes with the toothed plate 747, the toothed rod 744 will also rotate when moving, so that the fixed sleeve 76 is away from the support sleeve 756, avoiding the descent path of the test piece 5 and preventing the fixed sleeve 76 from affecting the descending support sleeve 756. On the other hand, the toothed sleeve plate 741 drives the turntable 752 to rotate through the toothed rod 751. The turntable 752 pushes the trapezoidal plate 754 and the support sleeve 756 to move through the rotating plate 753, so that the support sleeve 756 drives the test piece 5 to rise first and move away from the dust collection sleeve 78. Since the support sleeve 756 rises to a high height, the time for the support sleeve 756 to rise and then fall is sufficient for the fixed sleeve 76 to complete the rotation and move away. The support sleeve 756 lowers the test piece 5 to a designated height, ensuring precise contact between the test piece 5 and the bonding platform 2. Finally, the support sleeve 756 moves down until it no longer contacts the test piece 5, preventing the test piece 5 from affecting the support sleeve 756 during the downward bonding process. Simultaneously, the threaded push rod 4 engages with the lifting and fixing device 3. The base 1 and the lifting and fixing device apply a downward tension force to the threaded push rod 4, ensuring a tight fit between the test piece 5 and the tapered surface of the bonding platform 2. Subsequently, gas is introduced, and the pressure gauge 6 reading is observed to determine if the sealing performance meets the standards, thus completing the gas pressure test.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A workpiece bonding airtightness testing fixture, comprising a base (1), a bonding platform (2) fixedly installed inside the base (1), a lifting and fixing device (3) provided inside the bonding platform (2), a threaded push rod (4) provided on the top of the base (1), a test piece (5) threadedly connected to the threaded push rod (4), and a pressure gauge (6) connected to one side of the base (1), characterized in that, Also includes: The anti-mistest cleaning component (7) is set on the base (1) and is used to automatically clean the bonding table (2) and the test piece (5); The anti-misdetection cleaning component (7) includes a base plate (71) fixedly connected to the base (1), a motor (72) fixedly connected to one side of the base plate (71), a screw (73) fixedly connected to the output end of the motor (72), a transmission component (74) provided on the screw (73), a lifting component (75) connected to the transmission component (74) provided inside the base (1), a fixing sleeve (76) connected to the transmission component (74) provided on the bonding platform (2), a toothed sleeve (77) slidably connected inside the fixing sleeve (76), a vacuum sleeve (78) connected to both the top and bottom of the toothed sleeve (77), and a self-opening and closing vacuuming device (79) provided at the bottom of the fixing sleeve (76). A rotation control element (8) is located at the bottom of the fixed sleeve (76) and is used to automatically rotate the gear sleeve (77).

2. The workpiece bonding airtightness testing fixture according to claim 1, characterized in that: The transmission component (74) includes a toothed sleeve plate (741) threaded onto a screw (73), a slide rod (742) slidably connected inside the toothed sleeve plate (741), a square sleeve (743) fixedly connected to one side of the slide rod (742), a toothed rod (744) movably connected inside the square sleeve (743) via a bearing, and the top of the toothed rod (744) fixedly connected to a fixed sleeve (76) via a connecting plate; A limiting sleeve (745) is fitted on the square sleeve (743), the limiting sleeve (745) is fitted on the first toothed rod (744), a retaining sleeve (746) is fixedly connected on the base plate (71), one side of the retaining sleeve (746) is in contact with the square sleeve (743), and a toothed plate (747) that meshes with the first toothed rod (744) is fixedly connected on the retaining sleeve (746).

3. The workpiece bonding airtightness testing fixture according to claim 2, characterized in that: The lifting assembly (75) includes a second gear (751) movably connected inside the base plate (71) via a bearing seat. The second gear (751) meshes with a toothed sleeve plate (741). A turntable (752) is fixedly connected to the second gear (751). A rotating plate (753) is hinged to one side of the turntable (752) via a shaft. A trapezoidal plate (754) is hinged to one side of the rotating plate (753) via a shaft. A trapezoidal sleeve (755) is fitted on the trapezoidal plate (754). The bottom of the trapezoidal sleeve (755) is fixedly connected to the base plate (71). A support sleeve (756) is fixedly connected to one side of the trapezoidal plate (754). The support sleeve (756) is fitted on the test piece (5). An infrared sensor switch (757) is fixedly connected to the support sleeve (756).

4. The workpiece bonding airtightness testing fixture according to claim 1, characterized in that: The self-closing vacuum cleaner (79) includes a jog switch (791) fixedly connected inside the fixed sleeve (76). The bottom of the fixed sleeve (76) is connected to a round sleeve (792). The inside of the round sleeve (792) is threadedly connected to a filter cartridge (793). The bottom of the round sleeve (792) is threadedly connected to a fan (794).

5. The workpiece bonding airtightness testing fixture according to claim 1, characterized in that: The rotation control component (8) includes a motor (81) fixedly connected to the bottom of the fixed sleeve (76). The output end of the motor (81) extends into the interior of the fixed sleeve (76) and is fixedly connected to a gear (82). The gear (82) meshes with the gear sleeve (77). A sponge pad (83) is fixedly connected to the dust collection sleeve (78).

6. The workpiece bonding airtightness testing fixture according to claim 1, characterized in that: A positioning sleeve (9) is fixedly connected to one side of the base plate (71), and the positioning sleeve (9) is sleeved on the screw (73).

7. The workpiece bonding airtightness testing fixture according to claim 2, characterized in that: Two guide plates (10) are symmetrically fixedly connected to the base plate (71). The side of the guide plate (10) near the toothed sleeve plate (741) is in contact with the surface of the toothed sleeve plate (741).

8. The workpiece bonding airtightness testing fixture according to claim 2, characterized in that: The retaining sleeve (746) is provided with an elastic reset member (11) inside. The elastic reset member (11) includes two anti-rotation rods (111) fixedly connected to one side of the limiting sleeve (745). The retaining sleeve (746) is sleeved on the anti-rotation rods (111). A disc (112) that contacts the retaining sleeve (746) is fixedly connected to one side of the anti-rotation rods (111). A spring (113) is sleeved on the anti-rotation rods (111). One end of the spring (113) is fixedly connected to the limiting sleeve (745), and the other end of the spring (113) is fixedly connected to the inside of the retaining sleeve (746).

9. The workpiece bonding airtightness testing fixture according to claim 3, characterized in that: A protective plate (12) is fixedly connected to one side of the base (1), and one side of the bottom plate (71) and the trapezoidal sleeve (755) are both fixedly connected to the protective plate (12).

10. The workpiece bonding airtightness testing fixture according to claim 2, characterized in that: A top sleeve (13) is fixedly connected to one side of the retaining sleeve (746). The top sleeve (13) is fitted onto the limiting sleeve (745). The bottom of the limiting sleeve (745) is in contact with the inner wall of the retaining sleeve (746).

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