Full-automatic air tightness testing machine for valve core

Abstract

The invention relates to a full-automatic air tightness testing machine for a valve core, and the machine comprises a test bench, the top of the test bench is provided with a first installation rack, the first installation rack is provided with a control panel, the top of the test bench is also provided with a second installation rack, and the bottom of the second installation rack is provided with a detection pedestal. The valve core cleaning device is provided with the feeding mechanism, the overturning assembly and the cleaning structure, the valve core in the conveying groove is clamped by a first material taking claw to move towards the direction of the detection base, an upper cover body and a lower cover body are clamped on the periphery of the valve core in combination with a second electric telescopic rod in the cleaning structure, a spray head conducts high-pressure blowing cleaning on the surface of the valve core, and meanwhile, the cleaning efficiency is improved. A first electric telescopic rod in the overturning assembly drives a first material taking claw to overturn, rotation of the valve core in the blowing process is achieved, it is ensured that the surface is clean and free of dead corners, then blown particles are extracted in time through a dust suction pipe, it is ensured that the detection environment is clean, and the accuracy of sealing performance detection is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve core detection, and in particular to a full-automatic air tightness testing machine for valve cores. BACKGROUND

[0002] As a key component of a tire inflation system, the air tightness of a valve core is directly related to the tire pressure maintaining capability, and further affects the safety and stability of vehicle driving and the service life of the tire. During the use of the tire, if the air tightness of the valve core is poor, the tire will slowly leak, the tire pressure will be insufficient, the energy consumption of vehicle driving will be increased, the tire grip will be reduced, and even a safety accident such as tire burst may be caused in severe cases.

[0003] In the use process of some existing full-automatic air tightness testing machines for valve cores, the valve cores are directly placed in a testing station for detection. During the conveying process, dust, metal debris and other particulate matters may be attached to the surface of the valve cores. If effective cleaning is not performed before the air tightness detection is directly carried out, the particulate matters may block the air passages of the valve cores or affect the bonding of the sealing surface, thereby reducing the reliability of the detection. In addition, the unloading mechanism of the existing testing machine often has the phenomenon of valve core accumulation and jamming. The manual unblocking after the accumulation will affect the detection rhythm. SUMMARY

[0004] In order to solve the problems proposed in the background, the present application provides a full-automatic air tightness testing machine for valve cores.

[0005] The full-automatic air tightness testing machine for valve cores provided by the present application adopts the following technical scheme:

[0006] A full-automatic air tightness testing machine for valve cores, comprising a testing table, a first mounting frame is installed on the top of the testing table, a control panel is installed on the first mounting frame, a second mounting frame is also installed on the top of the testing table, a detection base is installed at the bottom of the second mounting frame, a sealing seat is installed on the detection base, a first air cylinder is installed on the top of the second mounting frame, a detection upper cover is installed at one end of the first air cylinder, a sealing cover is installed at the bottom of the detection upper cover, an upper feeding mechanism is installed on one side of the top of the testing table, the upper feeding mechanism comprises a conveying frame installed on the top of the testing table near one side edge, a feeding disc and a plurality of conveying grooves are installed on the conveying frame, a cleaning structure is also installed on one side of the second mounting frame, the cleaning structure comprises a supporting seat installed on the side wall of the second mounting frame, a lower feeding mechanism is installed on the other side of the top of the testing table, the lower feeding mechanism comprises a mounting frame installed on the top of the testing table on the other side of the second mounting frame.

[0007] The test platform has symmetrical first electric cylinders installed on both sides of the conveyor frame at the top. The top of the first electric cylinder is fixedly connected to a first mounting base. A second cylinder is installed on the first mounting base. The output end of the second cylinder passes through a through hole in the first mounting base and is connected to a first fixing plate. Several first picking claws are installed on one side of the first fixing plate. The first picking claws correspond vertically to the conveying grooves on the conveyor frame. A flipping assembly is also installed on one side of the first fixing plate. The flipping assembly includes a support plate installed on the top of one side of the first fixing plate. Symmetrical first electric telescopic rods are installed on the top of the support plate. One end of the first electric telescopic rod passes through a through hole in the support plate and is connected to a connecting plate. Several first rack blocks are installed at the bottom of the connecting plate. Several transmission shafts are installed in the shaft holes in the side wall of the first fixing plate. One end of each transmission shaft is connected to a first picking claw installed on one side of the first fixing plate. A first gear is fixedly installed at the other end of the transmission shaft. The first rack blocks and the first gears mesh with each other.

[0008] Preferably, a second electric telescopic rod is installed on the top of the support base. The telescopic end of the second electric telescopic rod is connected to a U-shaped connecting frame. An air blowing assembly is installed at the bottom of the U-shaped connecting frame. The air blowing assembly includes an upper cover installed at the bottom of the U-shaped connecting frame. A nozzle is installed on the upper cover. Several nozzles are installed on the nozzle. One end of each nozzle passes through a through hole in the upper cover and enters the upper cover. One end of the nozzle is also connected to an air supply hose. The other end of the air supply hose is connected to an air pump installed on the top of the test bench. Symmetrical sliders are also installed at both ends of the upper cover. The sliders slide on a sliding rod installed at the bottom of the support base. The other end of the sliding rod is connected to the top of a connecting block installed on the side wall of the second mounting frame.

[0009] Preferably, a dust collection assembly is also installed at the bottom of the upper cover. The dust collection assembly includes a lower cover disposed at the bottom of the upper cover. One end of a connecting block installed on the side wall of the second mounting bracket at both ends of the lower cover is connected to the lower cover. A dust collection port is installed inside the lower cover. The dust collection port is connected to one end of a dust collection pipe installed at the bottom of the lower cover. The other end of the dust collection pipe is connected to a vacuum cleaner installed on the top of the test bench.

[0010] Preferably, a material-grabbing assembly is installed on one side of the mounting frame. The material-grabbing assembly includes a symmetrical third electric cylinder installed on one side of the mounting frame. A second mounting seat is installed on the top of the third electric cylinder. A third cylinder is installed on the top of the second mounting seat. The output end of the third cylinder is connected to a second fixing plate. A plurality of second material-grabbing claws are installed on one side of the second fixing plate.

[0011] Preferably, the mounting frame also includes a collection box and a feeding frame, and a material distribution assembly is also installed on the mounting frame. The material distribution assembly includes a material distribution plate installed on the mounting frame. A shaft is installed through the shaft holes at both ends of the material distribution plate. One end of the shaft is adapted to the shaft hole at one end of the mounting frame, and the other end of the shaft exits the shaft hole at the other end of the mounting frame and is equipped with a second gear. An L-shaped support block is also installed on the top of one end of the mounting frame. A second electric cylinder is installed on the top of the L-shaped support block. The telescopic end of the second electric cylinder is connected to a second rack block. The second rack block slides in a slide groove seat installed on the side wall of one end of the mounting frame, and the second rack block also meshes with the second gear.

[0012] Preferably, the inside of the feeding frame is equipped with symmetrical feeding ramps. One end of the feeding ramps is rotatably mounted on a shaft fixedly connected to the inner wall of the feeding frame. The bottom of the feeding frame and the placement slot on the test platform are equipped with a shaking component that drives the feeding ramps to shake the material. The shaking component includes a first connecting seat installed inside the placement slot. A first movable seat is rotatably mounted in the shaft holes at both ends of the first connecting seat. One end of the first movable seat is connected to a third electric telescopic rod. The second connecting block at the other end of the third electric telescopic rod is hinged to the second connecting seat installed at the bottom of the feeding ramp. The inner bottom surface of the feeding frame is provided with symmetrical feeding grooves, which are connected to the feeding channel on the test platform.

[0013] In summary, the present invention has the following beneficial technical effects:

[0014] 1. This invention includes a feeding mechanism, a flipping assembly, and a cleaning structure. The valve core is conveyed along a conveying groove via a conveying disc on a conveyor frame. A first picking claw grips the valve core from the conveying groove and moves it towards the testing base under the drive of a second cylinder. Combined with the second electric telescopic rod in the cleaning structure, the upper and lower covers clamp the valve core. Under the action of an air pump, air hose, spray pipe, and nozzle, the valve core surface is cleaned by high-pressure blowing. Simultaneously, the first electric telescopic rod in the flipping assembly drives the first picking claw to flip, achieving rotation of the valve core during the blowing process, ensuring thorough surface cleaning. Subsequently, a vacuum cleaner promptly removes the blown particles through the suction port and suction pipe, ensuring a clean testing environment and improving the accuracy of the sealing test.

[0015] 2. This invention includes a material-grabbing component, a material-splitting component, and a material-shaking component. A third cylinder drives a second fixed plate, which in turn drives a second grasping claw to grab the inspected valve core. This, combined with a second electric cylinder in the material-splitting component, pushes a second rack block, which in turn rotates a second gear, causing the material-splitting plate to rotate around its shaft, thus achieving directional sorting of the valve core. The shaking component, via a third electric telescopic rod, drives a second connecting block, causing a discharge ramp to oscillate back and forth within the discharge frame. This causes the valve core to slide down the discharge ramp and be orderly discharged through the discharge chute and discharge channel, ensuring smooth and unobstructed discharge and improving overall automated inspection efficiency and operational continuity. Furthermore, the rotation angle of the material-splitting plate is adjustable, and sensors provide real-time feedback on the valve core position, enabling precise material distribution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a fully automatic valve core airtightness testing machine according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the side conveyor frame structure of the test bench in an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the flipping component structure in an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the cleaning component structure in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the mounting frame in an embodiment of the present invention;

[0021] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged view of the structure at point A in the middle;

[0022] Figure 7 This is a schematic diagram of the jitter component structure in an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the top structure of the second mounting base in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Test bench; 2. First mounting bracket; 3. Second mounting bracket; 4. Detection base; 5. Detection cover; 6. Support base; 7. Conveyor frame; 8. First electric cylinder; 9. First mounting base; 10. Second cylinder; 11. First fixing plate; 12. First picking claw; 13. Support plate; 14. First electric telescopic rod; 15. Connecting plate; 16. First rack block; 17. Drive shaft; 18. First gear; 19. Second electric telescopic rod; 20. U-shaped connecting frame; 21. Upper cover; 22. Sprayer 23. Lower cover; 24. Suction pipe; 25. Slide rod; 26. Slider; 27. Mounting frame; 28. Collection box; 29. ​​Discharge frame; 30. Material distribution plate; 31. Second gear; 32. Second electric cylinder; 33. Second rack block; 34. Discharge inclined plate; 35. Second connecting seat; 36. Third electric telescopic rod; 37. First connecting seat; 38. Discharge trough; 39. Discharge channel; 40. Third electric cylinder; 41. Second mounting seat; 42. Third cylinder; 43. Second fixing plate; 44. Second picking claw. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 —8. The present invention will be described in further detail.

[0026] This invention discloses a fully automatic valve core airtightness testing machine, including a test bench 1, a first mounting frame 2 mounted on the top of the test bench 1, a control panel mounted on the first mounting frame 2, a second mounting frame 3 mounted on the top of the test bench 1, a detection base 4 mounted on the bottom of the second mounting frame 3, a sealing seat mounted on the detection base 4, a first cylinder mounted on the top of the second mounting frame 3, a detection cover 5 mounted on one end of the first cylinder, a sealing cover mounted on the bottom of the detection cover 5, a feeding mechanism mounted on the top of the test bench 1 on one side of the second mounting frame 3, the feeding mechanism including a conveyor frame 7 mounted on the top of the test bench 1 near one edge, a feeding tray and several conveying grooves mounted on the conveyor frame 7, a cleaning structure mounted on one side of the second mounting frame 3, the cleaning structure including a support seat 6 mounted on the side wall of the second mounting frame 3, and a discharging mechanism mounted on the top of the test bench 1 on the other side of the second mounting frame 3, the discharging mechanism including a mounting frame 27 mounted on the top of the test bench 1 on the other side of the second mounting frame 3;

[0027] refer to Figure 3The test bench 1 has symmetrical first electric cylinders 8 installed on both sides of the conveyor frame 7. A first mounting base 9 is fixedly connected to the top of each first electric cylinder 8. A second cylinder 10 is installed on the first mounting base 9. The output end of the second cylinder 10 passes through a through hole in the first mounting base 9 and is connected to a first fixing plate 11. Several first picking claws 12 are installed on one side of the first fixing plate 11. The first picking claws 12 correspond vertically to the conveying grooves on the conveyor frame 7. A flipping assembly is also installed on one side of the first fixing plate 11. The flipping assembly includes a support plate 13 installed on the top of one side of the first fixing plate 11. Symmetrical first electric telescopic rods 14 are installed on the top of the support plate 13. One end of each first electric telescopic rod 14 passes through a through hole in the support plate 13 and is connected to a connecting plate 15. Several first rack blocks 16 are installed at the bottom of the connecting plate 15. A number of drive shafts 17 are installed in the shaft holes opened on the side wall of a fixed plate 11. One end of each drive shaft 17 is connected to a first picking claw 12 installed on one side of the first fixed plate 11. The other end of the drive shaft 17 is fixedly installed with a first gear 18. The first rack block 16 meshes with the first gear 18. More specifically, when the valve core is fed, the first electric cylinder 8 drives the first mounting seat 9 to rise. After the valve core in the conveying groove is aligned with the first picking claw 12, the first electric cylinder 8 drives the first mounting seat 9 to fall, so that the first picking claw 12 can pick up the valve core in the conveying groove. Then, the second cylinder 10 drives the first fixed plate 11 to move towards the detection base 4, and sends the valve core to the top of the sealing seat. At this time, the first cylinder drives the detection cover 5 to move down, so that the sealing cover and the sealing seat cooperate to form a sealed space, thereby performing a sealing test on the valve core.

[0028] refer to Figure 4A second electric telescopic rod 19 is installed on the top of the support base 6. The telescopic end of the second electric telescopic rod 19 is connected to a U-shaped connecting frame 20. An air blowing assembly is installed at the bottom of the U-shaped connecting frame 20. The air blowing assembly includes an upper cover 21 installed at the bottom of the U-shaped connecting frame 20. A nozzle 22 is installed on the upper cover 21. Several nozzles are installed on the nozzle 22. One end of the nozzle passes through a through hole in the upper cover 21 and enters the upper cover 21. One end of the nozzle 22 is also connected to an air supply hose. The other end of the air supply hose is connected to the top of the test bench 1. The upper cover 21 is connected to an air pump. Symmetrical sliders 26 are installed at both ends of the upper cover 21. The sliders 26 slide on a sliding rod 25 installed at the bottom of the support base 6. The other end of the sliding rod 25 is connected to the top of a connecting block installed on the side wall of the second mounting bracket 3. A dust collection assembly is also installed at the bottom of the upper cover 21. The dust collection assembly includes a lower cover 23 located at the bottom of the upper cover 21. One end of a connecting block installed on the side wall of the second mounting bracket 3 is connected to one end of the lower cover 23. A dust collection port is installed inside the lower cover 23, and the dust collection port is connected to a connecting block installed at the bottom of the lower cover 23. One end of the suction pipe 24 is connected to a vacuum cleaner installed on the top of the test bench 1. More specifically, before the valve core is transferred to the sealing seat for testing by the first picking claw 12, the first picking claw 12 is moved between the upper cover 21 and the lower cover 23 by the second cylinder 10. Then, the second electric telescopic rod 19 moves the U-shaped connecting frame 20 down, so that the upper cover 21 and the lower cover 23 are clamped around the valve core. At this time, the air pump is started, and compressed air enters the spray pipe 22 through the air delivery hose and is sprayed by the nozzle. The head performs high-pressure blowing on the surface of the valve core to remove attached dust and impurities. At the same time, the first electric telescopic rod 14 drives the connecting plate 15 to descend, which in turn drives the first rack block 16 to move down. This causes the first rack block 16 to drive the first gear 18 to rotate, thereby causing the transmission shaft 17 to drive the first picking claw 12 to rotate. This achieves the rotation of the valve core during the blowing process, ensuring that the surface is clean without any dead corners. Subsequently, the vacuum cleaner removes the blown particles in a timely manner through the suction port and suction pipe 24, ensuring a clean testing environment and thus improving the accuracy of the sealing test.

[0029] refer to Figure 8 A material-grabbing assembly is installed on one side of the mounting frame 27. The material-grabbing assembly includes a symmetrical third electric cylinder 40 installed on one side of the mounting frame 27. A second mounting base 41 is installed on the top of the third electric cylinder 40. A third cylinder 42 is installed on the top of the second mounting base 41. The output end of the third cylinder 42 is connected to a second fixing plate 43. Several second material-grabbing claws 44 are installed on one side of the second fixing plate 43. More specifically, after the valve core has been tested, the third electric cylinder 40 drives the second mounting base 41 to rise, and the third cylinder 42 drives the second fixing plate 43 to drive the second material-grabbing claws 44 to clamp the valve core, so that the valve core moves to the top of the mounting frame 27.

[0030] refer to Figure 5 andFigure 6 The mounting frame 27 also houses a collection box 28 and a feeding frame 29. A material distribution assembly is also mounted on the mounting frame 27, including a material distribution plate 30. A shaft is inserted through shaft holes at both ends of the material distribution plate 30. One end of the shaft is fitted into a shaft hole at one end of the mounting frame 27, and the other end of the shaft exits through a shaft hole at the other end of the mounting frame 27 and is fitted with a second gear 31. An L-shaped support block is also mounted on the top of one end of the mounting frame 27, and a second electric cylinder 32 is mounted on the top of the L-shaped support block. The telescopic end is connected to a second rack block 33, which slides in a slide groove seat installed on one side wall of the mounting frame 27. The second rack block 33 also meshes with the second gear 31. More specifically, when the second electric cylinder 32 is started, the telescopic end of the second electric cylinder 32 drives the second rack block 33 to move. Through the meshing transmission between the second rack block 33 and the second gear 31, the material distribution plate 30 swings back and forth around the shaft axis, thereby causing unqualified valve cores to fall into the collection box 28, while qualified valve cores fall into the feeding frame 29, thus realizing automatic classification and collection.

[0031] refer to Figure 7 The feeding frame 29 has symmetrical feeding ramps 34 installed inside. One end of the feeding ramp 34 is rotatably mounted on a shaft fixedly connected to the inner wall of the feeding frame 29. The bottom of the feeding frame 29 and the placement slot on the test bench 1 are equipped with a shaking component that drives the feeding ramp 34 to shake the material. The shaking component includes a first connecting seat 37 installed inside the placement slot. A first movable seat is rotatably mounted in the shaft holes at both ends of the first connecting seat 37. One end of the first movable seat is connected to a third electric telescopic rod 36. The other end of the third electric telescopic rod 36 is provided with a second connecting block and a second connecting seat 35 installed at the bottom of the feeding ramp 34. The inner bottom surface of the feeding frame 29 is hinged and has symmetrical feeding grooves 38. The feeding grooves 38 are connected to the feeding channel 39 set on the test bench 1. More specifically, when a qualified valve core falls into the feeding frame 29, the third electric telescopic rod 36 periodically extends and retracts, driving the second connecting seat 35 to move back and forth, causing the feeding ramp 34 to swing slightly. This causes the qualified valve core in the feeding frame 29 to slide along the feeding ramp 34 to both sides and fall into the feeding channel 39 in an orderly manner through the feeding grooves 38, achieving continuous and stable discharge. During the shaking process, the valve cores separate from each other to avoid accumulation and blockage, ensuring smooth discharge.

[0032] The implementation principle of the fully automatic valve core airtightness testing machine of this invention is as follows: During use, the valve core to be tested is placed into the feeding mechanism. The valve core is conveyed along the conveying groove by the conveying disc on the conveying frame 7. When feeding the valve core, the first electric cylinder 8 drives the first mounting base 9 to rise. After the valve core in the conveying groove is aligned with the first picking claw 12, the first electric cylinder 8 drives the first mounting base 9 to descend, causing the first picking claw 12 to clamp the valve core in the conveying groove. Subsequently, the second cylinder 10 drives the first fixing plate 11 to move towards the testing base 4. The first picking claw 12 moves the valve core to the upper cover 2. Between the upper cover 21 and the lower cover 23, the second electric telescopic rod 19 drives the U-shaped connecting frame 20 to move downward, clamping the upper cover 21 and the lower cover 23 around the valve core. At this time, the air pump is started, and compressed air enters the nozzle 22 through the air delivery hose, and the nozzle blows the surface of the valve core under high pressure to remove the attached dust and impurities. At the same time, the first electric telescopic rod 14 drives the connecting plate 15 to descend, causing the first rack block 16 to move downward and drive the first gear 18 to rotate, causing the drive shaft 17 to drive the first picking claw 12 to rotate, realizing the rotation of the valve core during the blowing process, ensuring that the surface is clean without dead corners. Then the vacuum cleaner passes through the suction port and... The suction pipe 24 promptly removes the blown particles. After cleaning, the second electric telescopic rod 19 resets, sending the valve core above the sealing seat. At this time, the first cylinder drives the detection cover 5 to move downward, so that the sealing cover and the sealing seat cooperate to form a sealed space, thereby performing a sealing test on the valve core. After the test is completed, the third electric cylinder 40 drives the second mounting base 41 to rise, and the third cylinder 42 drives the second fixing plate 43 to drive the second picking claw 44 to clamp the valve core, moving the valve core to the top of the mounting frame 27. At this time, when the second electric cylinder 32 starts, the second rack block 33 moves downward and meshes with the second gear 31, causing the valve core to... The material plate 30 oscillates back and forth around the axis of the shaft, causing unqualified valve cores to fall into the collection box 28, while qualified valve cores fall into the discharge frame 29, achieving automatic classification and collection. After the qualified valve cores fall into the discharge frame 29, the third electric telescopic rod 36 periodically extends and retracts, driving the second connecting seat 35 to move back and forth, causing the discharge ramp 34 to oscillate slightly, thereby causing the qualified valve cores in the discharge frame 29 to slide to both sides along the discharge ramp 34 and fall orderly into the discharge channel 39 through the discharge trough 38, achieving continuous and stable discharge. During the shaking process, the valve cores separate from each other to avoid accumulation and blockage, ensuring smooth discharge.

[0033] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A fully automatic valve core airtightness testing machine, comprising a test bench (1), a first mounting frame (2) mounted on the top of the test bench (1), a control panel mounted on the first mounting frame (2), a second mounting frame (3) mounted on the top of the test bench (1), a detection base (4) mounted on the bottom of the second mounting frame (3), a sealing seat mounted on the detection base (4), a first cylinder mounted on the top of the second mounting frame (3), a detection cover (5) mounted on one end of the first cylinder, and a sealing cover mounted on the bottom of the detection cover (5), characterized in that: A feeding mechanism is installed on the top of the test bench (1) on one side of the second mounting frame (3). The feeding mechanism includes a conveyor frame (7) installed on the top of the test bench (1) near one side edge. The conveyor frame (7) is equipped with a feeding tray and several conveying grooves. A cleaning structure is also installed on one side of the second mounting frame (3). The cleaning structure includes a support base (6) installed on the side wall of the second mounting frame (3). A discharging mechanism is installed on the top of the test bench (1) on the other side of the second mounting frame (3). The discharging mechanism includes a mounting frame (27) installed on the top of the test bench (1) on the other side of the second mounting frame (3). The test bench (1) has symmetrical first electric cylinders (8) installed on both sides of the conveyor frame (7) at its top. The top of the first electric cylinder (8) is fixedly connected to a first mounting base (9). A second cylinder (10) is installed on the first mounting base (9). The output end of the second cylinder (10) passes through a through hole opened on the first mounting base (9) and is connected to a first fixing plate (11). A plurality of first picking claws (12) are installed on one side of the first fixing plate (11). The first picking claws (12) correspond vertically to the conveying groove on the conveyor frame (7). A flipping assembly is also installed on one side of the first fixing plate (11). The flipping assembly includes a component installed on the top of one side of the first fixing plate (11). A support plate (13) is provided with a symmetrical first electric telescopic rod (14) installed on the top of the support plate (13). One end of the first electric telescopic rod (14) passes through a through hole opened on the support plate (13) and is connected to a connecting plate (15). Several first rack blocks (16) are installed at the bottom of the connecting plate (15). Several transmission shafts (17) are installed in the shaft hole opened on the side wall of the first fixing plate (11). One end of each transmission shaft (17) is connected to a first picking claw (12) installed on one side of the first fixing plate (11). A first gear (18) is fixedly installed at the other end of the transmission shaft (17). The first rack block (16) and the first gear (18) mesh with each other.

2. The fully automatic valve core airtightness testing machine according to claim 1, characterized in that: The support base (6) is equipped with a second electric telescopic rod (19) at its top. The telescopic end of the second electric telescopic rod (19) is connected to a U-shaped connecting frame (20). The bottom of the U-shaped connecting frame (20) is equipped with an air blowing assembly. The air blowing assembly includes an upper cover (21) installed at the bottom of the U-shaped connecting frame (20). The upper cover (21) is equipped with a nozzle (22). The nozzle (22) is equipped with several nozzles. One end of the nozzle passes through the through hole on the upper cover (21) and enters the upper cover (21). One end of the nozzle (22) is also connected to an air supply hose. The other end of the air supply hose is connected to an air pump installed on the top of the test bench (1). The two ends of the upper cover (21) are also equipped with symmetrical sliders (26). The sliders (26) slide on the slide rod (25) installed at the bottom of the support base (6). The other end of the slide rod (25) is connected to the top of the connecting block installed on the side wall of the second mounting frame (3).

3. The fully automatic valve core airtightness testing machine according to claim 2, characterized in that: The bottom of the upper cover (21) is also equipped with a dust collection assembly, which includes a lower cover (23) set at the bottom of the upper cover (21). Both ends of the lower cover (23) are connected to one end of the connecting block installed on the side wall of the second mounting bracket (3). A dust collection port is installed inside the lower cover (23). The dust collection port is connected to one end of the dust collection pipe (24) installed at the bottom of the lower cover (23). The other end of the dust collection pipe (24) is connected to the vacuum cleaner installed on the top of the test bench (1).

4. The fully automatic valve core airtightness testing machine according to claim 1, characterized in that: A material-grabbing assembly is installed on one side of the mounting frame (27). The material-grabbing assembly includes a symmetrical third electric cylinder (40) installed on one side of the mounting frame (27). A second mounting seat (41) is installed on the top of the third electric cylinder (40). A third cylinder (42) is installed on the top of the second mounting seat (41). A second fixing plate (43) is connected to the output end of the third cylinder (42). A plurality of second material-grabbing claws (44) are installed on one side of the second fixing plate (43).

5. The fully automatic valve core airtightness testing machine according to claim 1, characterized in that: The mounting frame (27) is also equipped with a collection box (28) and a feeding frame (29). The mounting frame (27) is also equipped with a material distribution component, which includes a material distribution plate (30) installed on the mounting frame (27). A shaft is installed through the shaft holes at both ends of the material distribution plate (30). One end of the shaft is adapted to the shaft hole at one end of the mounting frame (27). The other end of the shaft passes through the shaft hole at the other end of the mounting frame (27) and is equipped with a second gear (31). An L-shaped support block is also installed on the top of one end of the mounting frame (27). A second electric cylinder (32) is installed on the top of the L-shaped support block. The telescopic end of the second electric cylinder (32) is connected to a second rack block (33). The second rack block (33) slides in the slide groove seat installed on the side wall of one end of the mounting frame (27). The second rack block (33) also meshes with the second gear (31).

6. The fully automatic valve core airtightness testing machine according to claim 5, characterized in that: The feeding frame (29) is equipped with symmetrical feeding ramps (34). One end of the feeding ramps (34) is rotatably mounted on a shaft fixedly connected to the inner wall of the feeding frame (29). The bottom of the feeding frame (29) and the placement slot opened on the test bench (1) are provided with a shaking component that drives the feeding ramps (34) to shake the material. The shaking component includes a first connecting seat (37) installed inside the placement slot. A first movable seat is rotatably mounted in the shaft holes at both ends of the first connecting seat (37). One end of the first movable seat is connected to a third electric telescopic rod (36). The second connecting block set at the other end of the third electric telescopic rod (36) is hinged to the second connecting seat (35) installed at the bottom of the feeding ramps (34). The inner bottom surface of the feeding frame (29) is provided with symmetrical feeding grooves (38). The feeding grooves (38) are connected to the feeding channel (39) set on the test bench (1).

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