Airtightness detection auxiliary device

Abstract

The utility model provides an air tightness detection auxiliary device which is used for clamping a shell of a tire pressure detector and comprises a support, a fixing plate, a jacking mechanism and a gasket. The support comprises a bearing part provided with an installation face and a limiting part, and the limiting part is formed by vertically extending from the edge of the bearing part in the direction away from the installation face. The fixing plate is connected to the tail end of the limiting part and forms an accommodating area with the support; the jacking mechanism comprises a driving piece and a pressing plate which are arranged on the fixing plate in a penetrating manner, and the pressing plate moves in the containing area in a manner of being close to or away from the mounting surface; the gasket is arranged on the other side of the pressing plate and comprises a base body and limiting blocks on the two sides of the base body, and the limiting blocks are slidably connected into the guide grooves of the limiting parts; the jacking mechanism pushes the gasket in the vertical direction, and the shell is clamped and fixed between the bearing part and the gasket; and the shell is clamped and fixed among the plurality of limiting parts in the horizontal direction. The airtight detection auxiliary device can prevent the ultrasonic wave joint of the rubber shell from being broken, and complete the pressure resistance detection of the bonding force of the copper nut and the shell.

Description

Technical Field

[0001] This utility model belongs to the field of tire pressure monitoring test auxiliary tools, specifically relating to an airtightness detection auxiliary device. Background Technology

[0002] Installing tire pressure sensors on car wheels allows for real-time monitoring of tire pressure, ensuring that drivers can quickly detect abnormal tire pressure, such as punctures, leaks, or insufficient pressure, thus reducing the risk of accidents.

[0003] External tire pressure monitoring systems (TPMS), a type of TPMS, are used on the tires of vehicles without pre-installed TPMS, specifically mounted on the outside of the wheel's air intake. In external TPMS, the adhesion strength between the brass nut and the housing that mates with the air intake is a crucial factor determining the monitoring stability and lifespan of the sensor. When the adhesion strength is sufficient, the probability of the brass nut detaching from the housing during operation is significantly reduced. Currently, the adhesion strength between the brass nut and the housing is typically measured by inflating the sensor until the nut detaches from the housing, thus indirectly determining the adhesion strength.

[0004] However, detectors using rubber housings employ an ultrasonic welding process to fuse the upper and lower rubber covers. When the internal air pressure is greater than the external air pressure, the upper and lower covers experience opposing forces due to the increased air pressure. The ultrasonically welded joint becomes the weakest point under the tension of the upper and lower covers. Tests show that the maximum air pressure that the ultrasonically welded joint can withstand is less than that at the joint between the copper nut and the housing. This means that before the air pressure reaches the pressure required for the copper nut to separate from the housing, the ultrasonically welded joint cracks and leaks, making further testing impossible. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides an airtightness detection auxiliary device. In the vertical direction, a pressing mechanism pushes a pad to clamp and fix the rubber housing of the external tire pressure sensor between the support and the pad. In the horizontal direction, the housing is clamped and fixed between multiple limiting parts. This ensures that when the airtightness detection auxiliary device is in use, the housing is clamped and limited in both the vertical and horizontal directions. This means that when pressure is applied to the rubber housing of the sensor, the ultrasonic welding joint between the upper and lower covers is essentially stress-free, allowing the sensor to continue to be pressurized until the air pressure value obtained when the copper nut separates from the housing is obtained. The device has a simple structure and is easy to operate.

[0006] The technical effect to be achieved by this utility model is specifically realized through the following technical solution:

[0007] This utility model provides an airtightness detection auxiliary device for clamping and fixing the housing of a tire pressure detector, comprising:

[0008] The support includes a supporting portion and a limiting portion. The supporting portion has a mounting surface that contacts the housing, and the limiting portion extends vertically from the edge of the supporting portion in a direction away from the mounting surface.

[0009] A fixing plate is fixedly connected to the end of the limiting part and surrounds the support to form a receiving area;

[0010] A pressing mechanism includes a driving member and a pressure plate. The driving member passes through the fixed plate and has a connecting portion. The pressure plate is fixedly connected to the connecting portion. The pressure plate moves within the receiving area in a manner that approaches or moves away from the mounting surface.

[0011] A gasket is disposed on the side of the pressure plate facing the mounting surface. The gasket includes a base and limiting blocks disposed on both sides of the base. The limiting part is provided with a guide groove, and the limiting block is slidably connected in the guide groove.

[0012] In the vertical direction, the pressing mechanism pushes the pad, and the housing is clamped and fixed between the supporting part and the pad; in the horizontal direction, the housing is clamped and fixed between the plurality of limiting parts.

[0013] In some embodiments, a through hole is provided in the support portion, and the housing has a detection end that is engaged in the through hole.

[0014] In some embodiments, a buffer portion is provided on the side of the gasket facing the mounting surface. The area of ​​the buffer portion is smaller than that of the gasket, and the buffer portion is deformed under pressure after abutting against the housing.

[0015] In some embodiments, the edge of the buffer portion extends away from the base to form a buffer edging; the side of the housing that contacts the buffer portion is the top of the housing, and the buffer edging completely covers the top of the housing.

[0016] In some embodiments, the limiting block has an extension and a guide, the extension is connected to the base, and the guide is located at the end of the extension; the guide has an arc-shaped structure, and the guide groove matches the shape of the guide.

[0017] In some embodiments, the side of the guide portion that is slidably connected to the guide groove is provided with a graphite coating.

[0018] In some embodiments, the drive member has a drive portion on the side away from the pressure plate, through which an external power source can drive the pressure plate to move.

[0019] In some embodiments, the end of the limiting portion extends outward away from the receiving area to form a locking position, and the fixing plate has a contact position at the position abutting the end of the limiting portion, the contact position being fixedly connected to the locking position.

[0020] In some embodiments, a buckle ring is also included, which surrounds the locking position and the contact position and fixes the locking position and the contact position in place; the locking position and the contact position together form a cylindrical structure.

[0021] In some embodiments, the support further includes a clamping pad, which is fixed to the side of the limiting portion facing the receiving area; the side of the housing that contacts the pad is the top of the housing, the housing has a detection end, and there is a clamping position between the top of the housing and the detection end; when the housing is located in the receiving area, the clamping position abuts against the clamping pad.

[0022] In summary, this utility model has at least the following advantages:

[0023] 1. The air tightness detection auxiliary device provided by this utility model places the housing of the tire pressure detector in the receiving area, and pushes the gasket through the top pressing mechanism. The housing is clamped and fixed between the support part and the gasket, realizing the vertical clamping limit of the housing. When the rubber housing is inflated, the tension originally subjected to the ultrasonic welding joint of the upper and lower covers is offset by the top pressure, and the air pressure that the housing can withstand is greatly increased, so that the maximum bearing air pressure when the copper nut is separated from the housing can be detected.

[0024] 2. The airtightness testing auxiliary device provided by this utility model uses multiple limiting parts to clamp and fix the shell, achieving horizontal limiting of the shell, and is slidably connected to the guide groove in conjunction with the limiting block. During clamping, the horizontal limiting can ensure that the vertical pressure on the shell is uniform, avoiding the situation where cracks and air leaks at the joint of ultrasonic welding due to horizontal displacement of the shell and local areas still not being clamped and subjected to force.

[0025] 3. The airtightness detection auxiliary device provided by this utility model uses an external power source to drive the driving component, causing the pressure plate to move towards the support part. After the pressure plate abuts against the gasket, it indirectly presses against the housing, thus completing the clamping and fixing of the tire pressure sensor housing. When the driving component works in the reverse direction, the pressure plate retracts, and the housing can be easily removed from the receiving area. Its overall structure is simple and easy to operate. Attached Figure Description

[0026] Figure 1 This is an isometric view of the housing of the tire pressure detector according to Embodiment 1 of this utility model.

[0027] Figure 2This is an isometric view of the airtightness detection auxiliary device of Embodiment 1 of this utility model.

[0028] Figure 3 for Figure 2 Sectional view of AA.

[0029] Figure 4 This is an isometric view of the shell fixed to the airtightness testing auxiliary device in Embodiment 1 of this utility model.

[0030] Figure 5 for Figure 4 BB cross-sectional view.

[0031] Figure 6 This is an isometric view of the positioning block and guide groove in Embodiment 1 of this utility model.

[0032] Figure 7 This is an isometric view of the airtightness detection auxiliary device of Embodiment 2 of this utility model.

[0033] Figure 8 This is an isometric view of the airtightness detection auxiliary device kit of Embodiment 3 of this utility model.

[0034] Marked in the image:

[0035] 10. Air tightness testing auxiliary device;

[0036] 1. Support, 11. Supporting part, 111. Mounting surface, 112. Snap hole, 12. Limiting part, 121. Guide groove, 122. Locking position, 13. Clamping pad;

[0037] 2. Fixing plate; 21. Contact position;

[0038] 3. Accommodation area;

[0039] 4. Top pressing mechanism; 41. Driving component; 411. Connecting part; 412. Driving part; 42. Pressure plate;

[0040] 5. Gasket; 51. Base; 52. Limiting block; 521. Extension; 522. Guide; 53. Buffer; 531. Buffer edge.

[0041] 6. Buckle the loop;

[0042] 20. Housing; 201. Top cover; 202. Bottom cover; 203. Detection end; 204. Top of housing; 205. Clamping position; 206. Copper nut; 207. Joint; 208. Top of housing.

[0043] 30. Air tightness testing auxiliary device kit; 301. Linkage bracket; 3011. Installation area. Detailed Implementation

[0044] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0045] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0046] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0048] Example 1

[0049] like Figure 1 The diagram shows a housing 20 for fixing a tire pressure monitoring device. The housing 20 is made of rubber and is formed by ultrasonic welding of an upper cover 201 and a lower cover 202. The housing 20 has a detection end 203, which is fitted with a copper nut 206 that wraps around one end of the housing 20 and is used to connect to the tire valve. During pressure resistance testing of the adhesion between the copper nut 206 and the housing, the ultrasonic weld joint 207 between the upper cover 201 and the lower cover 202 cracks and leaks air, making it impossible to continue the testing. To address this, this embodiment provides an airtightness testing auxiliary device 10, which clamps and fixes the housing 20 of the tire pressure monitoring device, significantly improving the pressure resistance of the ultrasonic weld joint 207, thereby completing the pressure resistance testing of the adhesion between the copper nut 206 and the housing 20.

[0050] like Figure 2 and Figure 3 As shown, an airtightness testing auxiliary device 10 includes a support 1, a fixing plate 2, a pressing mechanism 4, and a gasket 5. The support 1 includes a supporting portion 11 and a limiting portion 12. The supporting portion 11 has a mounting surface 111 that contacts the housing 20. The limiting portion 12 extends vertically from the edge of the supporting portion 11 in a direction away from the mounting surface 111. The fixing plate 2 is fixedly connected to the end of the limiting portion 12 and forms a receiving area 3 around the support 1. The pressing mechanism 4 includes a driving member 41 and a pressure plate 42. The driving member 41 passes through the fixing plate 2 and has a connecting portion 411. The pressure plate 42 is fixedly connected to the connecting portion 411 and moves within the receiving area 3 in a manner that approaches or moves away from the mounting surface 111. The gasket 5 is disposed on the side of the pressure plate 42 facing the mounting surface 111. The gasket 5 includes a base 51 and limiting blocks 52 disposed on both sides of the base 51. The limiting part 12 is provided with a guide groove 121, and the limiting block 52 is slidably connected in the guide groove 121.

[0051] The support 1 and the fixing plate 2 form a cage-like structure. The driving component 41 passes through the fixing plate 2 to drive the pressure plate 42 to move and abut against the side of the gasket 5 facing the fixing plate 2, so that the gasket 5 can move closer to the mounting surface 111. The gasket 5 is provided with a limiting block 52 that is slidably connected to the guide groove 121. The gasket 5 will not fall off the airtightness detection auxiliary device 10, nor will it be "locked" between the limiting parts 12 after the pressure plate 42 abuts against the gasket 5 due to deflection.

[0052] like Figure 4 As shown, in the vertical direction, the pressing mechanism 4 pushes the gasket 5, and the housing 20 is clamped and fixed between the support part 11 and the gasket 5. The housing 20 is fixed by clamping in the vertical direction, and the upper cover 201 and the lower cover 202 are pressed by the support part 11 and the gasket 5. When high-pressure gas is filled into the housing 20, the forces that the upper cover 201 and the lower cover 202 originally had in opposite directions are canceled out by the pressing force of the support part 11 and the gasket 5. The joint 207 of the ultrasonic welding is no longer pulled by the upper cover 201 and the lower cover 202 until it breaks, thus avoiding the situation where the joint 207 of the ultrasonic welding is broken before the gas pressure reaches the level that would allow the copper nut 206 to detach from the housing 20.

[0053] In the horizontal direction of the ultrasonic weld joint 207, the connection between the upper cover 201 and the lower cover 202 has a thicker structure. After being pressed down, the pressure-bearing capacity of the ultrasonic weld joint 207 in the horizontal direction is also greatly improved, and the air pressure it can withstand is far greater than the air pressure of the upper cover 201 and the lower cover 202 being pulled. Therefore, there is no need to worry about the ultrasonic weld joint 207 breaking and leaking air in the horizontal direction after being pressed down.

[0054] In the horizontal direction, the housing 20 is clamped and fixed between multiple limiting parts 12. By being placed in the accommodating area 3 and positioned by the limiting parts 12, the housing 20 can be better positioned at the optimal position where it is pressed by the supporting part 11 and the gasket 5. The pressing force at the joint 207 between the upper cover 201 and the lower cover 202 is more uniform, and the position where the force is better received. If the pressing force at the joint 207 is uneven, due to the soft and easily deformable characteristics of the rubber, the upper cover 201 at the joint 207 on the side with less force may still be torn by the air pressure at this position due to a relatively large local internal pressure. Clamping the housing 20 between multiple limiting parts 12 can better avoid the occurrence of the above problems.

[0055] During use, the measured housing 20 is placed into the accommodating area 3, surrounded by multiple limiting parts 12. The housing 20 is pressed between the supporting part 11 and the gasket 5 by the driving part 41, making the housing 20 and the entire airtight detection auxiliary device 10 integrated. Then, air pressure is added to the copper nut 206 on the housing 20 to achieve the pressure resistance detection of the adhesion between the copper nut 206 and the rubber housing 20. After the detection is completed, the driving part 41 is loosened so that the housing 20 is not pressed. The gasket 5 can move away from the housing 20, and then the housing 20 can be taken out of the accommodating area 3.

[0056] In this embodiment, for the convenience of processing and process implementation, there are two limiting parts 12. The support 1 and the fixed plate 2 form a "square" structure, and the housing 20 can enter the accommodating area 3 through both sides.

[0057] On the basis of Figures 2-4 , referring to Figure 5 , in some embodiments, a clamping hole 112 is provided through the supporting part 11, and the detection end 203 is clamped in the clamping hole 112. Through the clamping hole 112, the housing 20 can be set in the accommodating area 3 more accurately and quickly, and the force-bearing parts at the joint 207 are more uniform and accurate.

[0058] In some embodiments, a buffer part 53 is provided on one side of the gasket 5 facing the mounting surface 111. The area of the buffer part 53 is smaller than that of the gasket 5, and the buffer part 53 is deformed under pressure after abutting against the housing 20. When the housing 20 is pressed by the gasket 5, the buffer part 53 can effectively absorb a part of the pressure on the housing 20, and the amount of deformation of the housing 20 due to the reduced force is correspondingly reduced, avoiding cracking or excessive compression of the joint 207 of the ultrasonic welding due to excessive deformation of the housing 20. In order to ensure the pressing effect, the area where the housing 20 is pressed by the gasket 5 should be less than or equal to the area of the buffer part 53. The area of the buffer part 53 is smaller than that of the gasket 5, enabling both the housing 20 and the buffer part 53 to have a larger deformation space. <gro

[0059] In a further embodiment, the buffer portion 53 extends away from the base 51 to form a buffer edging 531. The side of the housing 20 that contacts the buffer portion 53 is the top of the housing 208, and the buffer edging 531 completely covers the top of the housing 208. The buffer edging 531 ensures that the horizontal deformation of the housing 20 is within a controllable range during the pressing process, and the ultrasonic welding joint 207 will not warp outwards horizontally due to excessive pressure. Of course, in this embodiment, the top of the housing 208 refers to the portion between the top cover 201 and the joint 207. With the buffer edging 531 surrounding the top of the housing 208, the possibility of the joint 207 warping outwards is essentially zero.

[0060] In some embodiments, the limiting block 52 has an extension 521 and a guide 522. The extension 521 is connected to the base 51, and the guide 522 is located at the end of the extension 521. The guide 522 has an arc-shaped structure, and the guide groove 121 matches the shape of the guide 522. Figure 6 As shown, the extension 521 connects the guide 522 to the base 51. Therefore, the extension 521 needs to have strong load-bearing capacity, and its structural strength ensures the firmness of the connection between the guide 522 and the base 51. The guide 522 has an arc-shaped structure, and the guide groove 121 matches and fits snugly with the guide 522, allowing the limiting block 52 to slide more precisely within the guide groove 121, reducing deflection. In this embodiment, the arc-shaped structure of the guide 522 is semi-circular, resulting in more uniform force and contact compared to other shapes, and improved wear resistance. Of course, in other embodiments, the shape of the guide 522 can be an elliptical arc, a parabolic arc, or other arc-shaped structure.

[0061] To improve smoothness and durability, in this embodiment, a graphite coating is provided on the side of the guide portion 522 that slides with the guide groove 121. Since the guide portion 522 slides in close contact with the guide groove 121, increased lubrication can extend the overall service life of the airtightness testing auxiliary device 10. However, due to the small size and minute structure of the airtightness testing auxiliary device 10, manually applying lubricating grease or using solid lubricants would unnecessarily waste maintenance personnel's time. Therefore, during the parts processing stage, a graphite coating is applied to the guide portion 522 of the gasket 5 as required, so that lubrication is achieved directly after installation. If jamming occurs, only the gasket 5 needs to be replaced to continue use, eliminating the need for a tedious manual lubrication process. The replaced gasket 5 can be recoated with a graphite coating for future use. Of course, in other embodiments, the guide portion 522 can also be coated with novel solid lubricating materials such as graphene coating to achieve lubrication between the guide portion 522 and the guide groove 121. Since the principle is the same, it will not be elaborated here.

[0062] In summary, the airtightness detection auxiliary device provided by this utility model places the housing of the tire pressure detector in the receiving area, and pushes the gasket through the top pressing mechanism. The housing is clamped and fixed between the support part and the gasket, realizing the vertical clamping and limiting of the housing. When the rubber housing is inflated, the tension originally subjected to the ultrasonic welding joint of the upper and lower covers is offset by the top pressure, and the air pressure that the housing can withstand is greatly increased, so that the maximum bearing air pressure when the copper nut is separated from the housing can be detected.

[0063] Secondly, multiple limiting parts clamp and fix the shell, achieving horizontal limitation of the shell, and are slidably connected to the guide groove in conjunction with the limiting block. During clamping, the horizontal limitation can ensure that the vertical pressure on the shell is uniform, avoiding the situation where cracks and air leaks at the joint of ultrasonic welding due to horizontal deviation of the shell, where local areas are still not clamped and subjected to force.

[0064] In addition, by using an external power source to drive the drive component, the pressure plate moves towards the support part. After the pressure plate abuts against the gasket, it indirectly presses against the housing, thus completing the clamping and fixing of the tire pressure sensor housing. When the drive component works in the reverse direction, the pressure plate retracts, and the housing can be easily removed from the receiving area. Its overall structure is simple and easy to operate.

[0065] Example 2

[0066] exist Figures 1-6 Based on this, refer to Figure 7 This embodiment provides an airtightness testing auxiliary device 10, which is an optimization and adjustment based on Embodiment 1. The difference is that the driving member 41 has a driving part 412 on the side away from the pressure plate 42, and an external power source can drive the pressure plate 42 to move through the driving part 412. The driving part 412 can be a manually driven butterfly structure or a knob structure, or a slot structure such as an internal hexagonal groove for connecting equipment, or a drive gear, etc. In this embodiment, the driving part 412 is a manually driven butterfly structure. The connection between the fixed plate 2 and the driving member 41 is achieved through a threaded structure. The driving part 412 of the butterfly structure is turned by hand, causing the driving member 41 to drive the pressure plate 42 to move through the thread.

[0067] In some embodiments, the end of the limiting part 12 extends outward away from the receiving area 3 to form a locking position 122. The fixing plate 2 has a contact position 21 at the position abutting against the end of the limiting part 12, and the contact position 21 is fixedly connected to the locking position 122. The fixed connection between the contact position 21 and the locking position 122 can be achieved by opening a through hole and a threaded hole, and then using a threaded fastener. Alternatively, through holes can be used, and bolts and nuts can be used for fastening. By fixing the contact position 21 and the locking position 122, the support 1 and the fixing plate 2 can be manufactured separately during production, and the parts of the support 1 and the fixing plate 2 can be interchanged.

[0068] Besides the issue of parts interchangeability during processing, since the housing 20 has a detection end 203 that engages with the locking hole 112, the driving component 41 needs to move the pressure plate 42 a relatively long distance to complete the unloading of the housing 20. Therefore, in this embodiment, the airtightness detection auxiliary device 10 also includes a retaining ring 6, which surrounds the locking position 122 and the contact position 21 and fixes the locking position 122 and the contact position 21. By setting the retaining ring 6, during unloading, the driving component 412 can rotate a small angle to release the pressure plate 42 from the gasket 5, thus releasing the housing 20. When released, the locking position 122 and the contact position 21 are no longer in a tight state with the retaining ring 6. At this time, the locking position 122 and the contact position 21 are not restricted by the retaining ring 6, and the retaining ring 6 can be quickly pulled out from both ends, the support 1 and the fixing plate 2 can be quickly separated, and the housing 20 under test can be removed and replaced.

[0069] To further enhance usability, the locking position 122 and contact position 21 form a cylindrical structure when combined. Correspondingly, the inner ring of the retaining ring 6 can be a near-circular, perforated structure. In use, the housing 20 is placed within the receiving area 3, and the support 1 and fixing plate 2 are fitted together at the locking position 122 and contact position 21, forming a cylindrical structure. The retaining ring 6 is fitted around the outer periphery of the locking position 122 and contact position 21. When the driving component 41 presses against the gasket 5, the support 1 and fixing plate 2 exert opposing forces, causing the arc-shaped structure of the locking position 122 and contact position 21 to abut against the inner side of the retaining ring 6, creating a gap between them. After the driving component 41 releases the force, the arc-shaped structure of the locking position 122 and contact position 21 disengages from the retaining ring 6. Due to the gap, the locking position 122 and contact position 21 can easily separate from the retaining ring 6, improving the ease of use of the airtightness detection auxiliary device 10.

[0070] In some embodiments, the support 1 further includes a clamping pad 13, which is fixed to the side of the limiting part 12 facing the receiving area 3. A clamping position 205 is provided between the top 208 of the housing and the detection end 203. When the housing 20 is located in the receiving area 3, the clamping position 205 abuts against the clamping pad 13. The clamping pad 13, which mates with the clamping position 205 of the housing 20, is provided on the support 1, facilitating the rotation of the housing 20 into the air source port. The rotation of the housing 20 can be achieved simply by rotating the airtightness detection auxiliary device 10, without requiring manual contact with the housing 20, further improving ease of use and reducing effort.

[0071] Example 3

[0072] exist Figures 1-7 Based on this, refer to Figure 8This embodiment provides an airtightness testing auxiliary device 10 kit for use on a production line. Applied to the production line, it performs quality testing on the "adhesion force between the copper nut and the housing" of tire pressure sensors after production. It includes a linkage bracket 301 and the airtightness testing auxiliary device 10 described in Embodiment 1 or 2. The linkage bracket 301 has a mounting area 3011, within which the airtightness testing auxiliary device 10 is disposed, and the drive component 41 is drivenly connected to the linkage bracket 301. In use, the housing 20 of the tire pressure sensor can be placed into the receiving area 3 manually or mechanically. The linkage bracket 301 is activated, causing all housings 20 to be pressed against their corresponding gaskets 5. The linkage bracket 301 can use interconnected gears to drive the drive component 41 to rotate, achieving a one-to-many driving mode. Then, high-pressure gas is injected into the housing 20 for testing. After testing, the housing 20 is removed and transferred to quality inspection personnel for evaluation. Quality inspection personnel determine the pass / fail status of the housing 20 based on airtightness and appearance. This enables batch testing of the adhesive strength and pressure resistance between the copper nut 206 and the housing 20 on the production line, improving the testing efficiency of the tire pressure monitoring system production line.

[0073] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. An airtightness detection auxiliary device for clamping and fixing the housing (20) of a tire pressure detector, characterized in that, include: The support (1) includes a supporting part (11) and a limiting part (12). The supporting part (11) is provided with a mounting surface (111) that contacts the housing (20). The limiting part (12) extends vertically from the edge of the supporting part (11) in a direction away from the mounting surface (111). The fixing plate (2) is fixedly connected to the end of the limiting part (12) and surrounds the support (1) to form a receiving area (3). The pressing mechanism (4) includes a driving member (41) and a pressure plate (42). The driving member (41) passes through the fixed plate (2). The driving member (41) has a connecting part (411). The pressure plate (42) is fixedly connected to the connecting part (411). The pressure plate (42) moves in the receiving area (3) in a manner that approaches or moves away from the mounting surface (111). A gasket (5) is disposed on the side of the pressure plate (42) facing the mounting surface (111). The gasket (5) includes a base (51) and limiting blocks (52) disposed on both sides of the base (51). The limiting part (12) is provided with a guide groove (121). The limiting block (52) is slidably connected in the guide groove (121). In the vertical direction, the pressing mechanism (4) pushes the pad (5), and the housing (20) is clamped and fixed between the support part (11) and the pad (5); in the horizontal direction, the housing (20) is clamped and fixed between the plurality of limiting parts (12).

2. The airtightness detection auxiliary device according to claim 1, characterized in that, A locking hole (112) is provided through the support part (11), and the housing (20) has a detection end (203), which is engaged in the locking hole (112).

3. The airtightness detection auxiliary device according to claim 2, characterized in that, A buffer portion (53) is provided on the side of the gasket (5) facing the mounting surface (111). The area of ​​the buffer portion (53) is smaller than that of the gasket (5), and the buffer portion (53) is deformed under pressure after abutting against the housing (20).

4. The airtightness detection auxiliary device according to claim 3, characterized in that, The buffer portion (53) extends away from the base (51) to form a buffer edging (531); the side of the shell (20) that contacts the buffer portion (53) is the top of the shell (208), and the buffer edging (531) completely covers the top of the shell (208).

5. The airtightness testing auxiliary device according to claim 1, characterized in that, The limiting block (52) is provided with an extension (521) and a guide (522). The extension (521) is connected to the base (51), and the guide (522) is located at the end of the extension (521). The guide (522) has an arc-shaped structure, and the guide groove (121) matches the shape of the guide (522).

6. The airtightness detection auxiliary device according to claim 5, characterized in that, The side of the guide portion (522) that is slidably connected to the guide groove (121) is provided with a graphite coating.

7. The airtightness testing auxiliary device according to claim 1, characterized in that, The drive member (41) has a drive part (412) on the side away from the pressure plate (42), and an external power source can drive the pressure plate (42) to move through the drive part (412).

8. The airtightness detection auxiliary device according to claim 7, characterized in that, The end of the limiting part (12) extends outward away from the receiving area (3) to form a locking position (122). The fixing plate (2) has a contact position (21) at the position that abuts against the end of the limiting part (12). The contact position (21) is fixedly connected to the locking position (122).

9. The airtightness detection auxiliary device according to claim 8, characterized in that, It also includes a buckle (6), which surrounds the locking position (122) and the contact position (21) and fixes the locking position (122) and the contact position (21) in place; the locking position (122) and the contact position (21) together form a cylindrical structure.

10. The airtightness detection auxiliary device according to claim 9, characterized in that, The support (1) also includes a clamping pad (13), which is fixed to the side of the limiting part (12) facing the receiving area (3); the side of the housing (20) that contacts the gasket (5) is the top of the housing (208), the housing (20) has a detection end (203), and there is a clamping position (205) between the top of the housing (208) and the detection end (203). When the housing (20) is located in the receiving area (3), the clamping position (205) abuts against the clamping pad (13).

Images