Air tightness detection device

Abstract

The utility model relates to the technical field of rim air tightness detection, in particular to an air tightness detection device. The utility model provides an air tightness detection device which is used for detecting the air tightness of a rim. The air tightness detection device comprises a first sealing table, a second sealing table and a driving assembly, the first sealing table and the second sealing table are oppositely arranged, the first sealing table is used for opening or sealing the opening of the inner end, and the second sealing table is used for opening or sealing the opening of the outer end; the driving assembly is used for driving the first sealing table and the second sealing table to get close to or away from each other. By arranging the first sealing table and the second sealing table, the opening positions of the inner end and the outer end of the rim can be sealed, and follow-up detection work can be conveniently carried out. The driving assembly is arranged to drive the first sealing table and the second sealing table, and automation of the device is achieved. Compared with the prior art, the manual participation degree is low, convenience and rapidness are achieved, and efficiency is high. Meanwhile, equipment such as a water pool is not needed, and the field occupancy rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel rim air tightness detection, in particular to an air tightness detection device. Background Art

[0002] The rim is commonly known as the wheel ring, which is a part of the wheel used to install and support the tire. In order to ensure the vehicle installation form, the rim needs to be tested for air tightness before leaving the factory. Avoid the impact of cracks on the rim on driving safety.

[0003] In the prior art, the air tightness test of the rim is usually carried out by the air pressure bubbling method. The working principle of the air pressure bubbling method is: the inner and outer ends of the rim are pressed tightly by the upper and lower molds, and a closed chamber is formed between the upper and lower molds and the rim, and a certain pressure of gas is introduced into the closed chamber, and then the entire rim is immersed in a pool of water, and whether the air tightness is good is judged by observing whether there are bubbles in the water.

[0004] However, the air pressure bubbling method requires manual installation of the upper and lower molds, and the wheel rim needs to be thrown into a water pool after installation. This method has low detection efficiency, wastes manpower, and is costly. In addition, the water pool occupies a large space and has high requirements for the factory building. Utility Model Content

[0005] (I) The problem to be solved by the utility model is that the existing wheel rim inspection uses hydrogen / helium for inspection, which is costly, and if the wheel rim leaks, it will have a certain impact on the accuracy of subsequent inspection results.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the embodiment of the utility model provides an air tightness detection device for detecting the air tightness of a rim, wherein the rim has an inner end and an outer end opposite to each other, and both the inner end and the outer end are open;

[0008] The airtightness detection device comprises: a first sealing platform, a second sealing platform and a driving assembly;

[0009] The first sealing platform and the second sealing platform are arranged opposite to each other, the first sealing platform corresponds to the inner end and is used to open or seal the opening of the inner end, and the second sealing platform corresponds to the outer end and is used to open or seal the opening of the outer end;

[0010] The driving assembly is used to drive the first sealing platform and the second sealing platform to move closer to or farther from each other.

[0011] Furthermore, it also includes a detection component, which is used to detect gas flow information at the weld of the rim.

[0012] Furthermore, the detection component is a gas flow monitoring sensor.

[0013] Furthermore, it also includes at least one pair of oppositely arranged wind shields, and the detection component is arranged between two oppositely arranged wind shields.

[0014] Furthermore, sealing gaskets are provided on surfaces of the first sealing platform and the second sealing platform that are arranged opposite to each other.

[0015] Furthermore, it also includes a displacement component, the detection member is arranged on the displacement component, and the displacement component is used to drive the detection member to move.

[0016] Further, the displacement assembly includes a first linear module and a second linear module;

[0017] The first linear module is arranged parallel to the axis of the rim, and the second linear module is installed on the first linear module;

[0018] The detection member is mounted on the second linear module, and the second linear module is used to drive the detection member to move toward or away from the rim.

[0019] Furthermore, the second sealing platform is provided with an air inlet hole;

[0020] When the first sealing platform closes the opening of the inner end and the second sealing platform closes the opening of the outer end, the first sealing platform, the second sealing platform and the rim form a closed space;

[0021] One end of the air inlet is communicated with the enclosed space, and the other end is communicated with the air source.

[0022] Furthermore, the driving assembly is connected to the second sealing platform, and drives the second sealing platform to move toward or away from the first sealing platform.

[0023] Furthermore, it also includes a guide structure;

[0024] The guide structure is arranged along a preset movement direction of the second sealing platform, and a connecting structure corresponding to the guide structure is arranged on the second sealing platform, and the connecting structure is connected to the guide structure.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides an air tightness detection device, which is used for air tightness detection of a wheel rim, wherein the wheel rim has an inner end and an outer end opposite to each other, and both the inner end and the outer end are openly arranged; the air tightness detection device comprises: a first sealing platform, a second sealing platform and a driving component; the first sealing platform is opposite to the second sealing platform, the first sealing platform corresponds to the inner end, and is used for opening or sealing the open part of the inner end, and the second sealing platform corresponds to the outer end, and is used for opening or sealing the open part of the outer end; the driving component is used for driving the first sealing platform and the second sealing platform to move closer to or away from each other.

[0027] When in use, the rim is placed on one of the sealing platforms, such as the first sealing platform. At this time, the first sealing platform seals the open part of the inner end of the rim. Then, the first sealing platform and the second sealing platform are driven to approach each other through the driving assembly, so that the second sealing platform abuts against the outer end of the rim to seal the open part of the outer end of the rim. At this point, the first sealing platform, the second sealing platform and the rim together form a closed space. Then, gas can be injected into the closed space through the valve core on the rim, or the preset air inlet holes on the first sealing platform and / or the second sealing platform, and it can be detected whether there is gas flow at the weld.

[0028] To detect whether there is gas flow in the weld, the operator can feel it with his hands, or apply a non-volatile fluid to the weld and observe whether there are bubbles in the fluid. Detection parts can also be set up.

[0029] By setting up the first sealing platform and the second sealing platform, the open parts of the inner and outer ends of the rim can be sealed to facilitate subsequent testing. By setting up a driving component to drive the first and second sealing platforms to move closer to or away from each other, the device can be automated. Compared with the prior art, the airtightness testing device in this embodiment has low manual participation, is convenient and fast, and has high efficiency. At the same time, there is no need to use equipment such as a water tank, and the site occupancy rate is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of an airtightness detection device provided in an embodiment of the utility model.

[0032] Icon: 11 – first sealing platform; 12 – second sealing platform;

[0033] 21 - drive motor;

[0034] 31 - guide structure;

[0035] 41 - top plate; 42 - bottom plate; 43 - side plate; 44 - frame body;

[0036] 51 - Inspection piece. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] like Figure 1 As shown, an embodiment of the utility model provides an airtightness detection device for airtightness detection of a wheel rim, wherein the wheel rim has an inner end and an outer end opposite to each other, and both the inner end and the outer end are open; the airtightness detection device comprises: a first sealing platform 11, a second sealing platform 12 and a driving assembly. The first sealing platform 11 is arranged opposite to the second sealing platform 12, the first sealing platform 11 corresponds to the inner end, and is used to open or seal the open part of the inner end, and the second sealing platform 12 corresponds to the outer end, and is used to open or seal the open part of the outer end. The driving assembly is used to drive the first sealing platform 11 and the second sealing platform 12 to move closer to or away from each other.

[0039] The air tightness detection device provided in this embodiment is used to detect whether there are defects such as cracks at the weld of the rim, which may cause the rim to leak and affect the safety of the subsequent use of the rim. The rim structure is a prior art well known in the art. The rim is a columnar structure with a relative inner end and outer end, and the inner end and the outer end are both open. The air tightness detection device includes a first sealing platform 11, a second sealing platform 12 and a driving assembly. Among them, the first sealing platform 11 and the second sealing platform 12 are arranged opposite to each other. The driving assembly can drive the first sealing platform 11 and the second sealing platform 12 to move closer to or away from each other. The first sealing platform 11 is arranged corresponding to the inner end of the rim and can seal the open part of the inner end of the rim. The second sealing platform 12 is arranged corresponding to the outer end of the rim and can seal the open part of the outer end of the rim.

[0040] The air tightness detection device provided in this embodiment has the following operating principle: when in use, the rim is placed on one of the sealing platforms, such as the rim is placed on the first sealing platform 11. At this time, the first sealing platform 11 seals the open part of the inner end of the rim, and then the first sealing platform 11 and the second sealing platform 12 are driven to approach each other through the driving assembly, so that the second sealing platform 12 abuts against the outer end of the rim to seal the open part of the outer end of the rim. At this point, the first sealing platform 11, the second sealing platform 12 and the rim together form a closed space. Afterwards, gas can be injected into the closed space through the valve core on the rim, or the preset air inlet holes on the first sealing platform 11 and / or the second sealing platform 12, and it can be detected whether there is gas flow at the weld.

[0041] In this embodiment, to detect whether there is gas flow in the weld, the operator can use the hands to feel it, or apply a non-volatile fluid to the weld to observe whether there are bubbles in the fluid. Alternatively, a detection member 51 can be set. In order to improve the accuracy of the detection result, this embodiment preferably adopts the latter, and the details are explained below.

[0042] The air tightness detection device provided in this embodiment can seal the open parts of the inner and outer ends of the rim by setting the first sealing platform 11 and the second sealing platform 12, so as to facilitate subsequent detection work. The automation of the device is realized by setting a driving component to drive the first sealing platform 11 and the second sealing platform 12 to move closer to or away from each other. Compared with the prior art, the air tightness detection device in this embodiment has low manual participation, is convenient and fast, and has high efficiency. At the same time, there is no need to use equipment such as a water tank, and the site occupancy rate is low.

[0043] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, it also includes a detection component 51, and the detection component 51 is used to detect the gas flow information at the weld of the rim.

[0044] In this embodiment, the air tightness detection device further includes a detection member 51, which detects whether there is gas flow information at the weld to determine whether the weld has defects. By setting the detection member 51 to detect whether there is gas flow at the weld, the efficiency is high and the accuracy is high.

[0045] Optionally, the detection member 51 may be a balloon arranged at the weld. When gas flows at the weld, the gas fills into the balloon, causing the balloon to swell, thereby reminding the operator that there are defects in the weld.

[0046] Preferably, in this embodiment, the detection component 51 is a gas flow monitoring sensor, which is arranged at the weld to detect whether there is gas flow at the weld, and then determine whether there are defects in the weld. After testing, the gas flow monitoring sensor can not only detect whether there are defects at the weld, but also, due to its high accuracy, can detect the specific location of the defect, which is convenient for subsequent operators to handle.

[0047] When in use, the rim is placed on the first sealing platform 11 with the weld facing the gas flow monitoring sensor.

[0048] Optionally, in this embodiment, the air tightness detection device may also be provided with a driving motor 21 for driving the first sealing platform 11 to rotate. This allows the weld to be aligned with the gas flow monitoring sensor without having to align the weld when the rim is placed on the first sealing platform 11. The driving motor 21 may then be used to drive the rim to rotate so that the weld is aligned with the gas flow monitoring sensor.

[0049] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, it also includes at least one pair of oppositely arranged wind shields, and the detection member 51 is arranged between the two oppositely arranged wind shields.

[0050] In this embodiment, the airtightness detection device further comprises at least one pair of oppositely disposed wind shields, and the detection member 51 is disposed between the two oppositely disposed wind shields. By arranging the wind shields around the detection member 51, it is possible to prevent external airflow from interfering with the normal operation of the detection member 51.

[0051] In this embodiment, preferably, the first sealing platform 11 and the second sealing platform 12 are both arranged horizontally. When the air tightness detection device includes a pair of windshields, the two windshields are arranged vertically, and the vertical dimension of the windshield is not less than the thickness dimension of the rim.

[0052] When in use, all external airflow is blocked by the wind shield and will not affect the detection results of the gas flow monitoring sensor.

[0053] When the air tightness detection device includes two pairs of wind shields, the four wind shields can form a frame structure, and the detection member 51 is arranged in the frame structure formed by the four wind shields.

[0054] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, the surfaces of the first sealing platform 11 and the second sealing platform 12 that are arranged opposite to each other are both paved with sealing gaskets.

[0055] In this embodiment, optionally, the surfaces opposite to the first sealing platform 11 and the second sealing platform 12 are both paved with sealing gaskets, which may be made of flexible materials such as rubber, silicone, etc., to seal the openings at the inner and outer ends of the rim.

[0056] By arranging sealing pads on two opposite surfaces of the first sealing platform 11 and the second sealing platform 12, rims of various sizes can be sealed with excellent sealing effects, thereby improving the applicability of the airtightness detection device.

[0057] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, a displacement component is also included, and the detection member 51 is arranged on the displacement component, and the displacement component is used to drive the detection member 51 to move.

[0058] The airtightness detection device provided in this embodiment also includes a displacement component, and the detection member 51 is arranged on the displacement component. The displacement component can be used to adjust the positional relationship between the detection member 51 and the rim, so as to facilitate the determination of the specific location of the weld defect and improve the accuracy of the detection result of the detection member 51.

[0059] Optionally, in this embodiment, the air tightness detection device further includes a bracket, and the windshield can be rotatably mounted on the bracket to prevent the windshield from affecting the placement of the rim.

[0060] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, the displacement assembly includes a first linear module and a second linear module; the first linear module is arranged parallel to the axis of the rim, and the second linear module is installed on the first linear module; the detection member 51 is installed on the second linear module, and the second linear module is used to drive the detection member 51 to move toward or away from the rim.

[0061] In this embodiment, preferably, the displacement assembly includes a first linear module and a second linear module. The linear module has the advantages of simple structure, high precision, and low cost. The first linear module is arranged parallel to the axis of the rim, that is, parallel to the axis of the first sealing platform 11 and the second sealing platform 12, and is used to adjust the position of the detection member 51 vertically. The second linear module is arranged on the first linear module, and is used to drive the detection member 51 to move in a direction close to or away from the rim.

[0062] When in use, when the first sealing platform 11 seals the inner opening of the rim and the second sealing platform 12 seals the outer opening of the rim, the second linear module drives the detection member 51 to move toward the rim to improve the accuracy of the detection result of the detection member 51.

[0063] Optionally, the second linear module is disposed on the first linear module and is perpendicular to the first linear module.

[0064] Optionally, in this embodiment, the displacement component may also be any one or more of a pneumatic cylinder, an oil cylinder or an electric cylinder.

[0065] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, an air inlet is provided on the second sealing platform 12; when the first sealing platform 11 closes the opening of the inner end and the second sealing platform 12 closes the opening of the outer end, the first sealing platform 11, the second sealing platform 12 and the rim form a closed space; one end of the air inlet is connected to the closed space, and the other end is connected to the air source.

[0066] In this embodiment, an air inlet hole is provided on the second sealing platform 12. One end of the air inlet hole is connected to the air source, and the other end is connected to the closed space surrounded by the first sealing platform 11, the second sealing platform 12 and the rim. The air source can be used to fill the closed space with gas, so as to avoid the air inlet structure on the rim affecting the strength of the rim.

[0067] Optionally, in this embodiment, the gas source may be an air pump or a gas cylinder. In this embodiment, the latter is adopted, and the gas cylinder is arranged on the bracket.

[0068] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, the driving assembly is connected to the second sealing platform 12 , and drives the second sealing platform 12 to move toward or away from the first sealing platform 11 .

[0069] In this embodiment, specifically, the first sealing platform 11 is fixedly arranged, and the driving assembly is connected to the second sealing platform 12 and is used to drive the second sealing platform 12 to move in a direction close to or away from the first sealing platform 11. By fixing the first sealing platform 11, the second sealing platform 12 is driven in the direction of the first sealing platform 11. When in use, the rim is placed on the first sealing platform 11, and since the first sealing platform 11 is fixed, the rim is relatively stable. Then, the second sealing platform 12 is driven by the driving assembly to move in the direction of the first sealing platform 11, and the open part of the outer end of the rim is closed.

[0070] Further, such as Figure 1 As shown, the drive assembly includes a drive motor 21, a screw and a bearing. The output shaft of the drive motor 21 is connected to the screw, and optionally, a coupling or other structure can be provided between the output shaft and the screw. The second sealing platform 12 is connected to the screw through a threaded hole thereon, and the threaded hole has a smooth section. The bearing is provided in the smooth section. By providing the bearing, the stability of the screw can be improved.

[0071] When in use, the second sealing platform 12 can be displaced along the axial direction of the screw by rotating the screw, so that the second sealing platform 12 can abut against the outer end of the rim.

[0072] Optionally, in this embodiment, the driving component may also be a pneumatic cylinder or an oil cylinder.

[0073] The airtightness detection device provided by the embodiment of the utility model is as follows: Figure 1 As shown, it also includes a guide structure 31; the guide structure 31 is arranged along the preset movement direction of the second sealing platform 12, and a connecting structure corresponding to the guide structure 31 is arranged on the second sealing platform 12, and the connecting structure is connected to the guide structure 31.

[0074] The air tightness detection device provided in this embodiment further includes a guide structure 31, which is arranged along the preset movement direction of the second sealing platform 12, and plays a role in guiding the second sealing platform 12, ensuring the smooth operation of the second sealing platform 12, and avoiding deviation between the second sealing platform 12 and the outer end of the rim. A connecting structure is arranged on the second sealing platform 12, and the connecting structure corresponds to the guide structure 31, and the connecting structure is connected to the guide structure 31.

[0075] Optionally, in this embodiment, the guide structure 31 is a guide rod, and a guide hole corresponding to the guide rod is provided on the second sealing platform 12, which has a simple structure and is practical.

[0076] Furthermore, in this embodiment, the guide rod is arranged in parallel with the screw rod to guide the second sealing platform 12 .

[0077] Preferably, two guide rods are provided, and correspondingly, two guide holes are also provided.

[0078] Optionally, in this embodiment, the guide structure 31 may also be a slide rail, and the connecting structure is a pulley disposed on the second sealing platform 12 and corresponding to the slide rail.

[0079] The airtightness detection device provided in this embodiment is as follows: Figure 1 As shown, the frame also includes a bracket, which includes a frame body 44, a top plate 41, a bottom plate 42 and a side plate 43. The bottom plate 42, the top plate 41 and the side plate 43 are all installed on the frame body 44, the top plate 41 is arranged opposite to the bottom plate 42, and the side plate 43 is arranged between the bottom plate 42 and the top plate 41, and is perpendicular to the bottom plate 42 and the top plate 41. The two ends of the side plate 43 are connected to the sides of the bottom plate 42 and the top plate 41 respectively.

[0080] The first sealing platform 11 is installed on the bottom plate 42, the second sealing platform 12 is located between the bottom plate 42 and the top plate 41, the two ends of the guide rod are respectively connected to the top plate 41 and the bottom plate 42, the drive motor 21 is arranged on the side of the top plate 41 away from the bottom plate 42, and the output shaft of the drive motor 21 passes through the top plate 41 and is connected to the screw rod. The displacement assembly and the wind shield are both installed on the side plate 43.

[0081] Furthermore, a through hole is formed on the top plate 41 , and a gas supply pipeline of the gas source passes through the through hole and is connected with the gas inlet hole on the second sealing platform 12 .

[0082] The air tightness detection device provided by the embodiment of the utility model, when in use, first, the drive motor 21 drives the screw to rotate, so that the first sealing platform 11 and the second sealing platform 12 are separated from each other, and then the rim is placed on the first sealing platform 11 by manual or mechanical arm. In addition, the inner end of the rim faces the first sealing platform 11, and the outer end faces the second sealing platform 12. When placing the rim, it should be noted that the weld of the rim is placed toward the gas flow monitoring sensor. After the rim is placed, the drive motor 21 drives the screw to rotate, and the second sealing platform 12 is abutted against the outer end of the rim to seal the open part of the outer end of the rim. At this point, the rim is sealed. Afterwards, air is introduced into the enclosed space surrounded by the first sealing platform 11, the second sealing platform 12 and the rim through the gas cylinder arranged on the bracket through the air inlet on the second sealing platform 12. At the same time, the first linear module and the second linear module cooperate to move the gas flow monitoring sensor to the weld position for detection. When the gas flow monitoring sensor detects gas flow, it will sound an alarm (the alarm can be realized by an alarm light and / or a buzzer), indicating that the rim weld has defects.

[0083] If there is no air leakage at the weld of the rim, it means that the rim is qualified, and the air in the enclosed space is released, and then the second sealing platform 12 is driven by the driving motor 21 to move away from the first sealing platform 11, and the rim can be removed.

[0084] Among them, the weld on the rim is usually a longitudinal weld, and the working process of the displacement component driving the gas flow monitoring sensor is: first, the gas flow monitoring sensor is driven to move in the direction of the weld close to the rim through the second linear module, and then, the gas flow monitoring sensor is driven to reciprocate through the first linear module.

[0085] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0086] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An airtightness detection device, characterized in that: Used for air tightness detection of a wheel rim, wherein the wheel rim has an inner end and an outer end opposite to each other, and both the inner end and the outer end are open; The airtightness detection device comprises: a first sealing platform (11), a second sealing platform (12) and a driving component; The first sealing platform (11) and the second sealing platform (12) are arranged opposite to each other, the first sealing platform (11) corresponds to the inner end and is used to open or seal the opening of the inner end, and the second sealing platform (12) corresponds to the outer end and is used to open or seal the opening of the outer end; The driving assembly is used to drive the first sealing platform (11) and the second sealing platform (12) to move closer to or farther from each other.

2. The airtightness detection device according to claim 1, characterized in that: It also comprises a detection part (51), wherein the detection part (51) is used to detect gas flow information at the weld of the rim.

3. The airtightness detection device according to claim 2, characterized in that: The detection element (51) is a gas flow monitoring sensor.

4. The airtightness detection device according to claim 2, characterized in that: It also comprises at least one pair of oppositely arranged wind shields, and the detection member (51) is arranged between the two oppositely arranged wind shields.

5. The airtightness detection device according to claim 1, characterized in that: Sealing pads are provided on surfaces of the first sealing platform (11) and the second sealing platform (12) that are arranged opposite to each other.

6. The airtightness detection device according to claim 2, characterized in that: It also comprises a displacement component, the detection member (51) is arranged on the displacement component, and the displacement component is used to drive the detection member (51) to move.

7. The airtightness detection device according to claim 6, characterized in that: The displacement assembly includes a first linear module and a second linear module; The first linear module is arranged parallel to the axis of the rim, and the second linear module is installed on the first linear module; The detection member (51) is mounted on the second linear module, and the second linear module is used to drive the detection member (51) to move in a direction approaching or away from the rim.

8. The airtightness detection device according to claim 1, characterized in that: The second sealing platform (12) is provided with an air inlet hole; When the first sealing platform (11) closes the opening of the inner end and the second sealing platform (12) closes the opening of the outer end, the first sealing platform (11), the second sealing platform (12) and the rim form a closed space; One end of the air inlet is communicated with the enclosed space, and the other end is communicated with the air source.

9. The airtightness detection device according to claim 1, characterized in that: The driving assembly is connected to the second sealing platform (12), and drives the second sealing platform (12) to move in a direction approaching or away from the first sealing platform (11).

10. The airtightness detection device according to claim 9, characterized in that: Also includes a guide structure (31); The guide structure (31) is arranged along a preset movement direction of the second sealing platform, and a connecting structure corresponding to the guide structure (31) is arranged on the second sealing platform (12), and the connecting structure is connected to the guide structure (31).

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