A full-automatic hub air tightness detection device

Abstract

The application discloses a kind of full-automatic wheel hub air tightness detection device, belong to wheel hub detection device technical field.It includes a plurality of parallel arrangement detection table and the feeding and discharging conveying mechanism that passes through detection table, feeding and discharging conveying mechanism includes plate chain conveying component, jacking assembly and discharging assembly, multiple tray assemblies are installed on plate chain conveying component with equal interval, tray assembly includes mounting plate, top plate and adjusting plate, adjusting plate is linked with top plate and all is equipped with the air hole that is connected, jacking assembly is located at the output end of plate chain conveying component inside, for lifting adjusting plate and driving top plate and wheel hub to rise to preset height, discharging assembly includes two symmetrically arranged discharging rods, the diameter of two discharging rods interval is less than wheel hub outer ring, for supporting wheel hub outer ring inner wall from below and guiding discharging.The application realizes wheel hub automatic separation and transfer, without manual intervention, significantly improve detection efficiency and reduce manpower input.

Description

Technical Field

[0001] This invention belongs to the technical field of wheel hub testing devices, and relates to a fully automatic wheel hub air tightness testing device. Background Technology

[0002] Motorcycle wheel hubs widely adopt a geometric configuration of "large at both ends and small in the middle". The outer rim is responsible for fixing and supporting the tire, while the inner hub integrates the bearing for mounting on the axle. After the wheel hub is manufactured, it usually needs to undergo air tightness testing. Only wheel hubs that pass the test can be used with tires. The air tightness of the wheel hub is an important indicator for measuring its performance. One of the commonly used testing methods is helium air tightness testing. This involves placing the wheel hub under test in a vacuum container and sealing both ends to form an inner sealed cavity and an outer sealed cavity. After filling the inner sealed cavity with a certain amount of helium, the pressure change in the outer sealed cavity is measured.

[0003] Patent document CN218674112U discloses a wheel hub airtightness testing device, including a frame with a mounting platform on the frame. A sealing cylinder is fitted around the mounting platform. A sealing cover is connected to the frame via a pressure-bearing lifting mechanism. The sealing cover and the sealing cylinder are positioned vertically opposite each other and are sealed together. The two ends of the wheel hub to be tested are respectively sealed to the first sealing surface and the second sealing surface to form a first sealing cavity on the inner side of the wheel hub and a second sealing cavity on the outer side. An air pump and a vacuum pump are respectively connected to the first sealing surface and the second sealing cavity. A leak detector is also connected to the second sealing cavity.

[0004] However, the aforementioned existing technologies still have the following technical problems: The aforementioned existing technology relies on manual operation for loading and unloading wheel hubs. This means that the wheel hubs need to be manually placed at the inspection station and then manually removed after inspection. This results in a cumbersome operation process and low work efficiency. Moreover, an operator can only manage a maximum of two machines at the same time, which is difficult to meet the requirements of large-scale production for inspection efficiency and automation. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a fully automatic wheel hub air tightness testing device, thereby solving the technical problems of existing wheel hub air tightness testing devices relying on manual loading and unloading and having low testing efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions: A fully automatic wheel hub air tightness testing device includes several testing platforms arranged in parallel at equal intervals, and a loading and unloading conveying mechanism passing through the testing platforms. The loading and unloading conveying mechanism includes: A plate chain conveyor assembly is arranged along the conveying direction, and multiple pallet assemblies are installed on it at equal intervals. Each pallet assembly includes a mounting plate, a top plate movably arranged on the mounting plate, and an adjusting plate located below the mounting plate. The adjusting plate is linked to the top plate, and both the adjusting plate and the top plate are provided with interconnected vent holes. A lifting assembly is disposed inside the plate chain conveyor assembly and located at the output end of the loading and unloading conveyor mechanism. It is used to cooperate with the adjusting plate to lift the adjusting plate upward, thereby driving the top plate and the wheel hub on it to rise to a preset height. The unloading assembly is located at the output end of the plate chain conveyor assembly and includes two symmetrically arranged unloading rods. A channel for the hub to pass through is formed between the two unloading rods. The distance between the two unloading rods is smaller than the outer diameter of the hub. The unloading assembly is used to support the inner wall of the outer circumference of the hub from below when the hub falls and guide the hub to the next station.

[0007] The plate chain conveyor assembly enables synchronous conveying at multiple workstations, and the lifting assembly and unloading assembly work together to achieve automatic separation and transfer without manual intervention, which significantly improves inspection efficiency and reduces manpower input.

[0008] Furthermore, the plate chain conveyor assembly includes: Conveyor frame; Two sets of sprockets are symmetrically arranged on both sides of the conveyor frame. Each set of sprockets includes multiple drive sprockets that are rotatably mounted on the side wall of the conveyor frame. Two chains, each chain being respectively fitted onto multiple drive sprockets of a corresponding set of sprockets; Multiple drive shafts, each drive shaft having its two ends fixedly connected to two corresponding drive sprockets in two sets of sprockets; A conveyor motor is fixed on the conveyor frame, and its output shaft is connected to one of the drive sprockets. The mounting plates of the plurality of pallet assemblies are fixed at both ends to the two chains respectively.

[0009] The above structure ensures the synchronization of chain operation, keeps the pallet assembly horizontal and runs smoothly, has strong load-bearing capacity and high positioning accuracy, and provides a reliable foundation for the stable transport of wheel hubs between multiple inspection stations.

[0010] Furthermore, the mounting plate has an adjustment hole, the top plate is slidably installed in the adjustment hole, at least two guide rods are fixed on the adjustment plate, the mounting plate has a guide hole for the guide rod to pass through, one end of the guide rod passes through the guide hole and is fixed with a stop block, a spring is sleeved on the guide rod, and the two ends of the spring abut against the mounting plate and the stop block respectively.

[0011] Furthermore, one end of the adjusting plate is provided with an inclined portion, and the lifting assembly includes a mounting frame fixed in the conveying frame and a lifting member fixed on the mounting frame. The lifting member cooperates with the inclined portion to lift the adjusting plate upward by pushing against the inclined portion when the pallet assembly moves to the unloading station.

[0012] Furthermore, each of the feeding rods includes an adjustment section, a horizontal section, an arc section, and an inclined section in sequence along the conveying direction. The adjustment sections of the two feeding rods cooperate to adjust the position of the hub. The horizontal section is used to support the hub after it is lifted up. The arc section is used to guide the hub to fall gradually. The inclined section is used to allow the hub to slide down by its own weight.

[0013] Furthermore, the lifting member includes a plurality of drive rollers that are rotatably mounted in the mounting frame along the conveying direction. Among the plurality of drive rollers, the height of the first few drive rollers along the conveying direction increases sequentially, while the height of the remaining drive rollers remains the same.

[0014] Furthermore, it also includes a control unit, which is fixed on the conveyor frame and electrically connected to the signal terminals of the conveyor motor and each testing station, for controlling the conveying, positioning and testing process of the wheel hub.

[0015] Furthermore, a circular groove is formed on the top of the top plate, and the vent hole is connected to the circular groove.

[0016] Furthermore, the detection station includes: frame; The lower mold base is fixed on the frame and is used to seal and fit against the lower end face of the wheel hub; Upper mold base, which is disposed above the frame and is used to seal and fit against the upper end face of the wheel hub; A sealing cylinder, the sealing cylinder being fixed on the frame, its output end being connected to the top of the upper mold base; A pressure gauge is fixed on the frame. A detection pipe is connected to the bottom of the pressure gauge. A detection hole is provided on the upper mold base. One end of the detection pipe is embedded in the detection hole. An air pump is fixed on one side of the frame. The lower mold base has a connection hole and a mounting hole that connects to the connection hole. An air supply pipe is connected to one side of the air pump, and one end of the air supply pipe is embedded and fixed in the mounting hole.

[0017] The main technical effects of this invention are reflected in the following aspects: 1. Fully automated loading and unloading of wheel hub airtightness testing is achieved, significantly improving testing efficiency: This invention uses a plate chain conveyor assembly that runs through multiple testing stations, with multiple pallet assemblies installed at equal intervals on it. This enables automatic conveying and station positioning of wheel hubs between testing stations. The lifting and unloading assemblies work together to automatically lift the wheel hub from the conveyor line and guide it to the unloading station after testing. The entire process requires no manual intervention. Compared to the existing technology that requires manual placement and removal of wheel hubs one by one at the testing station, this invention greatly reduces manpower input. A single conveyor line can serve multiple testing stations simultaneously, effectively meeting the demand for high testing efficiency in large-scale production.

[0018] 2. Precise and stable loading and unloading actions ensure the reliability of automated operation: The pallet assembly of this invention adopts a linkage structure of mounting plate, top plate and adjusting plate. When the pallet assembly moves to the unloading station with the chain, the lifting component cooperates with the inclined part at one end of the adjusting plate to smoothly lift the adjusting plate and top plate upward, so that the hub rises to the preset height and enters the guide range of the unloading component. Subsequently, the lifting component is released, the spring causes the top plate and adjusting plate to automatically reset, and the hub falls naturally between the two unloading rods under the action of gravity. This structure is ingeniously designed and the action is smooth. Unloading can be completed without an additional power source, effectively reducing the equipment manufacturing cost and control complexity. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Figure 1 ; Figure 2 This is a structural schematic diagram of an embodiment of the present invention. Figure 2 ; Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of point A in the middle; Figure 4 This is an exploded view of the pallet assembly according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the pallet assembly according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 Enlarged view of point B in the middle; Figure 8This is a schematic diagram of the detection station according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Testing table; 11. Frame; 12. Lower mold base; 121. Connecting hole; 13. Upper mold base; 14. Sealing cylinder; 15. Pressure gauge; 151. Testing pipe; 16. Air pump; 161. Air supply pipe; 2. Mounting plate; 21. Top plate; 211. Vent hole; 212. Circular groove; 22. Adjusting plate; 221. Guide rod; 222. Stop block; 223. Spring; 224. Inclined part; 23. Adjusting hole; 3. Feeding rod; 31. Adjusting section; 32. Horizontal section; 33. Arc-shaped section; 34. Inclined section; 4. Conveyor frame; 41. Drive sprocket; 42. Chain; 43. Drive shaft; 44. Conveyor motor; 45. Drive roller; 46. Control unit; 47. Mounting frame. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1-6 As shown, a fully automatic wheel hub air tightness testing device includes several testing platforms 1 arranged in parallel at equal intervals, and a loading and unloading conveying mechanism passing through the several testing platforms 1. The loading and unloading conveying mechanism includes: A plate chain conveyor assembly is provided, which is arranged along the conveying direction and has multiple pallet assemblies installed at equal intervals on it. Each pallet assembly includes a mounting plate 2, a top plate 21 movably arranged on the mounting plate 2, and an adjusting plate 22 located below the mounting plate 2. The adjusting plate 22 is linked to the top plate 21. Both the adjusting plate 22 and the top plate 21 have interconnected vent holes 211. The top plate 21 has a circular groove 212 on its top, and the vent holes 211 are connected to the circular groove 212. A lifting assembly is disposed inside the plate chain conveyor assembly and located at the output end of the loading and unloading conveyor mechanism. It is used to cooperate with the adjusting plate 22 to lift the adjusting plate 22 upward, thereby driving the top plate 21 and the hub on it to rise to a preset height. The unloading assembly is located at the output end of the plate chain conveyor assembly and includes two symmetrically arranged unloading rods 3. A channel for the hub to pass through is formed between the two unloading rods 3. The distance between the two unloading rods 3 is smaller than the outer diameter of the hub. The unloading rods are used to support the inner wall of the outer circumference of the hub from below when the hub falls and guide the hub to the next station.

[0023] The pallet components, which are set at equal intervals on the plate chain conveyor, enable synchronous conveying and positioning at multiple workstations. The linkage design of the lifting component and the unloading component allows the wheel hub to automatically detach from the conveyor line and transfer to the next workstation after inspection, without the need for manual intervention.

[0024] like Figure 1 , 6 As shown, the plate chain conveyor assembly includes: Conveying frame 4; two sets of sprocket groups symmetrically arranged on both sides of the conveying frame 4, each set of sprocket groups including four drive sprockets 41 arranged in a rectangular shape and rotatably mounted on the side wall of the conveying frame 4; Two chains 42, each chain 42 being respectively sleeved on multiple transmission sprockets 41 of a corresponding set of sprockets; Multiple drive shafts 43, each drive shaft 43 having its two ends fixedly connected to two corresponding drive sprockets 41 in two sets of sprocket groups; A conveyor motor 44 is fixed on the conveyor frame 4, and its output shaft is connected to one of the transmission sprockets 41. The mounting plates 2 of the multiple pallet assemblies are fixed at both ends to the two chains 42 respectively. The fully automatic wheel hub air tightness testing device also includes a control unit 46, which is fixed on the conveyor frame 4. The control unit 46 is electrically connected to the signal terminals of the conveyor motor 44 and each testing station 1 respectively, and is used to control the conveying, positioning and testing process of the wheel hub.

[0025] like Figure 4-7 As shown, the mounting plate 2 has an adjustment hole 23, the top plate 21 is slidably installed in the adjustment hole 23, at least two guide rods 221 are fixed on the adjustment plate 22, the mounting plate 2 has a guide hole for the guide rods 221 to pass through, one end of the guide rod 221 passes through the guide hole and is fixed with a stop block 222, and a spring 223 is sleeved on the guide rod 221, the two ends of the spring 223 abut against the mounting plate 2 and the stop block 222 respectively.

[0026] One end of the adjusting plate 22 is provided with an inclined portion 224. The lifting assembly includes a mounting frame 47 fixed in the conveying frame 4 and a lifting member fixed on the mounting frame 47. The lifting member cooperates with the inclined portion 224 to lift the adjusting plate 22 upward by pushing against the inclined portion 224 when the pallet assembly moves to the unloading station. Each unloading rod 3 includes an adjusting section 31, a horizontal section 32, an arc section 33 and an inclined section 34 in sequence along the conveying direction. The adjusting sections 31 of two unloading rods 3 cooperate to adjust the position of the hub. The horizontal section 32 is used to receive the hub after it is lifted. The arc section 33 is used to guide the hub to fall gradually. The inclined section 34 is used to allow the hub to slide down by its own weight. The lifting member includes a plurality of transmission rollers 45 that are rotatably installed in the mounting frame 47 in sequence along the conveying direction. Among the plurality of transmission rollers 45, the height of the first few transmission rollers 45 along the conveying direction increases sequentially, while the height of the remaining transmission rollers 45 remains the same.

[0027] A conveyor belt can be installed on one side of the conveyor frame 4. One end of the conveyor belt is located below the inclined section 34. The conveyor belt is used to receive the wheel hubs that slide down from the inclined section 34 and transport them to other processing stations.

[0028] like Figure 1 , 8 As shown, the testing station 1 includes: a frame 11; a lower mold base 12, which is fixed on the frame 11 and is used to seal against the lower end face of the wheel hub; and an upper mold base 13, which is disposed above the frame 11 and is used to seal against the upper end face of the wheel hub. A sealing cylinder 14 is fixed on the frame 11, and its output end is connected to the top of the upper mold base 13. It is used to drive the upper mold base 13 to rise and fall so that the upper mold base 13 is sealed and attached to or separated from the upper end face of the wheel hub. A pressure gauge 15 is fixed on the frame 11. A detection pipe 151 is connected to the bottom of the pressure gauge 15. A detection hole is provided on the upper mold base 13. One end of the detection pipe 151 is embedded in the detection hole. An air pump 16 is fixed on one side of the frame 11. The lower mold base 12 has a connection hole 121 and a mounting hole that connects to the connection hole 121. An air supply pipe 161 is connected to one side of the air pump 16, and one end of the air supply pipe 161 is embedded and fixed in the mounting hole.

[0029] The specific operation method of this invention is as follows: When the equipment is started, the control unit 46 issues a command, and the conveyor motor 44 drives the transmission sprocket 41 to rotate, which drives the two chains 42 to run synchronously. Multiple pallet assemblies move cyclically with the chains 42. The operator places the wheel hub to be tested on the top plate 21 of the pallet assembly. The lower end face of the wheel hub is positioned and engaged with the circular groove 212 on the top plate 21. The wheel hub passes through each testing station 1 in sequence along the pallet assembly and the conveyor chain assembly.

[0030] When multiple wheel hubs are simultaneously conveyed to the corresponding testing station 1, the control unit 46 issues a stop signal, and the conveying motor 44 stops. At this time, the wheel hub is located between the lower mold base 12 and the upper mold base 13 of the testing station 1. The control unit 46 controls the sealing cylinder 14 to operate, driving the upper mold base 13 to descend and seal it against the upper end face of the wheel hub. The lower end face of the wheel hub is connected to the connecting hole 121 of the lower mold base 12 through the vent holes 211 on the top plate 21 and the adjusting plate 22. During the descent of the wheel hub, it will drive the top plate 21 and the adjusting plate 22 to move synchronously, so that the lower end face of the adjusting plate 22 is sealed against the upper end face of the lower mold base 12, forming a closed testing cavity.

[0031] Control unit 46 starts air pump 16. Compressed air enters the wheel hub through air supply pipe 161, connection hole 121 and mounting hole of lower mold base 12, and then through vent holes 211 on adjustment plate 22 and top plate 21, so that the interior of the wheel hub reaches the preset test pressure. Pressure gauge 15 monitors the pressure change inside the wheel hub in real time through detection pipe 151. Control unit 46 determines whether the airtightness of the wheel hub is qualified according to the preset pressure holding time and pressure drop threshold, and records the test results.

[0032] After the test is completed, the control unit 46 controls the sealing cylinder 14 to reverse, driving the upper mold base 13 to rise and separate from the upper end face of the wheel hub. Under the action of the spring 223, the spring 223 pushes the stop block 222, and the stop block 222 drives the adjusting plate 22 and the top plate 21 to reset through the guide rod 221. The conveyor motor 44 restarts, and the pallet assembly carries the wheel hub that has completed the test to continue to move in the conveying direction.

[0033] When the pallet assembly carrying the wheel hubs that have completed all inspections moves to the unloading station, the inclined portion 224 at one end of the adjusting plate 22 contacts the drive roller 45 of the lifting assembly. Since the height of the first few drive rollers 45 along the conveying direction increases sequentially, the inclined portion 224 moves upward along the drive roller 45, driving the adjusting plate 22 upward. The adjusting plate 22 then drives the top plate 21 upward, thereby raising the wheel hub to a preset height. The pallet assembly continues to be conveyed, so that the wheel hub first passes between two adjusting sections 31, where the adjusting sections 31 adjust the position of the wheel hub, and then... After the hub moves and is conveyed a certain distance along the two horizontal sections 32, the adjusting plate 22 disengages from the drive roller 45, and the adjusting plate 22 and the top plate 21 reset under their own weight. At this time, the hub loses the support of the top plate 21 and falls. The adjusting sections 31 of the two feeding rods 3 cooperate to adjust the position of the hub. The subsequent pallet assembly moves with the chain 42, so that the hubs behind continuously enter the horizontal section 32 and push the hubs that enter in front, so that the hub at the front end gradually passes through the arc section 33 and the inclined section 34 to achieve automatic feeding.

[0034] The pallet assembly continues to move in a cycle with the chain 42, returning to the loading end and repeating the above steps to realize the simultaneous continuous operation of multiple testing stations 1, completing the fully automatic assembly line testing of wheel hub air tightness. Through the above operation method, the present invention realizes the fully automatic loading and unloading of wheel hub air tightness testing, significantly improving testing efficiency, reducing manpower input, and ensuring the stability and reliability of automated operation.

[0035] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A fully automatic wheel hub air tightness testing device, comprising a plurality of testing tables (1) arranged in parallel at equal intervals, and a loading and unloading conveying mechanism passing through the plurality of testing tables (1), characterized in that, The loading and unloading conveying mechanism includes: A plate chain conveyor assembly is arranged along the conveying direction, and multiple pallet assemblies are installed on it at equal intervals. Each pallet assembly includes a mounting plate (2), a top plate (21) movably arranged on the mounting plate (2), and an adjusting plate (22) located below the mounting plate (2). The adjusting plate (22) is linked to the top plate (21), and both the adjusting plate (22) and the top plate (21) are provided with interconnected ventilation holes (211). The lifting assembly is located inside the plate chain conveyor assembly and at the output end of the loading and unloading conveyor mechanism. It is used to cooperate with the adjusting plate (22) to lift the adjusting plate (22) upward, thereby driving the top plate (21) and the wheel hub on it to rise to a preset height. The unloading assembly is located at the output end of the plate chain conveyor assembly and includes two symmetrically arranged unloading rods (3). A channel for the hub to pass through is formed between the two unloading rods (3). The distance between the two unloading rods (3) is smaller than the outer diameter of the hub. The unloading assembly is used to support the inner wall of the outer ring of the hub from below when the hub falls and guide the hub to the next station.

2. The fully automatic wheel hub airtightness testing device according to claim 1, characterized in that, The plate chain conveyor assembly includes: Conveyor frame (4); Two sets of sprockets are symmetrically arranged on both sides of the conveyor frame (4). Each set of sprockets includes multiple drive sprockets (41) that are rotatably installed on the side wall of the conveyor frame (4). Two chains (42), each chain (42) is respectively sleeved on a plurality of drive sprockets (41) of a corresponding set of sprockets; Multiple drive shafts (43), each drive shaft (43) having its two ends fixedly connected to two corresponding drive sprockets (41) in two sets of sprocket groups; A conveyor motor (44) is fixed on the conveyor frame (4), and its output shaft is connected to one of the drive sprockets (41). The mounting plates (2) of the plurality of pallet assemblies are fixed at both ends to the two chains (42).

3. The fully automatic wheel hub airtightness testing device according to claim 2, characterized in that, The mounting plate (2) has an adjustment hole (23), the top plate (21) is slidably installed in the adjustment hole (23), the adjustment plate (22) has at least two guide rods (221) fixed on it, the mounting plate (2) has a guide hole for the guide rods (221) to pass through, one end of the guide rod (221) passes through the guide hole and is fixed with a stop block (222), a spring (223) is sleeved on the guide rod (221), and the two ends of the spring (223) abut against the mounting plate (2) and the stop block (222) respectively.

4. The fully automatic wheel hub airtightness testing device according to claim 3, characterized in that, One end of the adjusting plate (22) is provided with an inclined part (224). The lifting assembly includes a mounting frame (47) fixed in the conveying frame (4) and a lifting member fixed on the mounting frame (47). The lifting member cooperates with the inclined part (224) to lift the adjusting plate (22) upward by pushing against the inclined part (224) when the pallet assembly moves to the unloading station.

5. The fully automatic wheel hub airtightness testing device according to claim 1, characterized in that, Each of the feeding rods (3) includes an adjustment section (31), a horizontal section (32), an arc section (33), and an inclined section (34) in sequence along the conveying direction. The adjustment sections (31) of the two feeding rods (3) cooperate to adjust the position of the hub. The horizontal section (32) is used to receive the hub after it is lifted up. The arc section (33) is used to guide the hub to fall gradually. The inclined section (34) is used to make the hub slide down by its own weight.

6. The fully automatic wheel hub airtightness testing device according to claim 4, characterized in that, The lifting component includes multiple drive rollers (45) that are sequentially rotatably installed in the mounting frame (47) along the conveying direction. Among the multiple drive rollers (45), the height of the first few drive rollers (45) along the conveying direction increases sequentially, while the height of the remaining drive rollers (45) remains the same.

7. The fully automatic wheel hub airtightness testing device according to claim 2, characterized in that, It also includes a control unit (46), which is fixed on the conveyor frame (4). The control unit (46) is electrically connected to the signal terminals of the conveyor motor (44) and each detection station (1) to control the conveying, positioning and detection process of the wheel hub.

8. The fully automatic wheel hub airtightness testing device according to claim 3, characterized in that, The top plate (21) has a circular groove (212) at the top, and the ventilation hole (211) is connected to the circular groove (212).

9. The fully automatic wheel hub airtightness testing device according to claim 3, characterized in that, The testing station (1) includes: Rack (11); The lower mold base (12) is fixed on the frame (11) and is used to seal and fit with the lower end face of the hub. Upper mold base (13), the upper mold base (13) is disposed above the frame (11) for sealing and fitting with the upper end face of the hub; A sealing cylinder (14) is fixed on the frame (11), and its output end is connected to the top of the upper mold base (13). A pressure gauge (15) is fixed on the frame (11). The bottom of the pressure gauge (15) is connected to a detection pipe (151). The upper mold base (13) is provided with a detection hole. One end of the detection pipe (151) is embedded in the detection hole. An air pump (16) is fixed on one side of the frame (11). The lower mold base (12) has a connection hole (121). The lower mold base (12) has an installation hole that connects to the connection hole (121). An air supply pipe (161) is connected to one side of the air pump (16). One end of the air supply pipe (161) is embedded and fixed in the installation hole.

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