A kind of automobile air conditioner air tightness detection butt plug

Abstract

The utility model relates to automobile air conditioner automatic detection technical field especially, and more particularly to a kind of automobile air conditioner air tightness detection butt plug, it include: support, drive cylinder and floating unit;Drive cylinder is installed on support, and floating unit and drive cylinder are mutually driven connection between, floating unit includes support plate, joint and guide column connecting plate, support plate is fixedly connected to one side of drive cylinder, and conical positioning pin is installed on support plate.The utility model is designed by unique floating unit, specifically at the guide sleeve of the guide column and support plate connection place is equipped with 8mm axial clearance.This structure makes the whole joint part in multiple directions obtains greater adaptive floating range.Its floating amount is improved from 2mm of prior art to 8mm, can fully compensate the position error and positioning error of automobile air conditioner product on automatic production line, ensure that sealing head can be accurately, reliably inserted into measured workpiece.

Description

Technical Field

[0001] This utility model relates to the field of automatic detection technology for automotive air conditioning, and in particular to a connector for testing the air tightness of automotive air conditioning systems. Background Technology

[0002] Currently, automotive air conditioning air tightness testing connectors are key tools used in automobile manufacturing and repair for quickly and reliably connecting pipes to conduct air tightness tests.

[0003] The existing floating docking plug technology has the following technical problems:

[0004] 1. Existing floating connectors have a floating range of only 2mm. In automotive air conditioning automatic testing lines, due to the positional errors of the automotive air conditioning products themselves and product positioning errors, the floating range of existing technology cannot be accurately inserted into the products, resulting in incomplete sealing and a success rate of only 80%. This leads to production line shutdowns and affects production efficiency.

[0005] 2. Existing connectors use pneumatically tightened sealing heads, which are complex in structure, costly, and have high requirements for product positional consistency.

[0006] Therefore, a new type of automotive air conditioning air tightness testing connector is needed to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a connector for testing the airtightness of automotive air conditioning systems. This invention utilizes a unique floating unit design, specifically an 8mm axial clearance in the guide sleeve at the connection between the guide post and the support plate. This structure allows the entire connector to achieve a greater adaptive floating range in multiple directions. Its floating range is increased from 2mm in the prior art to 8mm, effectively compensating for positional and positioning errors of automotive air conditioning products on automated production lines, ensuring that the sealing head can be accurately and reliably inserted into the workpiece being tested.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a connector for testing the air tightness of an automotive air conditioner, comprising: a support, a drive cylinder, and a floating unit; the drive cylinder is mounted on the support, and the floating unit is mutually driven and connected to the drive cylinder; the floating unit includes a support plate, a connector, and a guide post connecting plate; the support plate is fixedly connected to one side of the drive cylinder, and a tapered positioning pin is installed on the support plate; the connector is located on one side of the support plate and is parallel to the support plate; a guide post is provided between the guide post connecting plate and the support plate, one end of the guide post is connected to the guide post connecting plate, and the other end of the guide post is connected to the connector via a spring; a positioning post is also provided between the support plate and the connector, one end of the positioning post is fixedly connected to the connector, and the other end of the positioning post passes through the support plate and is connected to the guide post connecting plate; a polyurethane tapered sealing head is installed on the connector.

[0009] Furthermore, a positioning post is provided between the support plate and the connector. One end of the positioning post is fixedly connected to the connector, and the other end of the positioning post passes through the support plate and is connected to the guide post connecting plate.

[0010] Furthermore, the guide post is fitted with a guide sleeve, which is installed at the connection between the support plate and the guide post.

[0011] Furthermore, an axial gap of 8mm is provided between the guide sleeve and the support plate.

[0012] Furthermore, an air intake connector is installed on the side of the connector opposite to the support plate.

[0013] The advantages of this utility model are:

[0014] 1. This utility model employs a unique floating unit design, specifically featuring an 8mm axial clearance in the guide sleeve at the connection between the guide post and the support plate. This structure allows the entire joint to achieve a greater adaptive floating range in multiple directions. The floating amount is increased from 2mm in the prior art to 8mm, effectively compensating for positional and positioning errors of automotive air conditioning products on automated production lines, ensuring that the sealing head can be accurately and reliably inserted into the workpiece being tested. This improvement significantly increases the success rate of airtightness testing from 80% to over 95%, greatly reducing production line downtime caused by insertion failures and effectively guaranteeing production cycle time and overall efficiency.

[0015] 2. This utility model abandons the complex and costly pneumatic tightening sealing method of existing technologies, and innovatively adopts a polyurethane conical sealing head. This sealing head utilizes the excellent elastic deformation capacity and wear resistance of polyurethane material, achieving reliable sealing through simple conical surface extrusion driven by a cylinder. This design simplifies the mechanical structure of the sealing head, reduces the stringent requirements for product positional consistency, and makes maintenance and replacement easier and faster. At the same time, the overall manufacturing cost of the sealing head is reduced by approximately 50% compared to the original solution, resulting in significant economic benefits. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] The components are: 11. Support; 12. Drive cylinder; 21. Positioning pin; 22. Spring; 23. Guide pin; 24. Guide sleeve; 25. Conical positioning pin; 26. Support plate; 27. Guide pin connecting plate; 28. Positioning pin fixing plate; 31. Polyurethane conical sealing head; 32. Air inlet connector; 33. Sealing gasket; 34. Connector. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example 1:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a cross-sectional structural diagram of the present invention. Figure 1 and Figure 2 As shown, this embodiment provides an automotive air conditioning air tightness testing connector, which is mainly used in the air tightness testing station of the automotive air conditioning automated production line. It can adapt to the positional error of the product and achieve fast and reliable sealing.

[0024] The docking plug mainly includes: a support 11, a drive cylinder 12, and a floating unit.

[0025] The drive cylinder 12 is bolted to the support 11. The support 111 is used to fix the entire docking plug device on the frame or motion module of the automated production line, providing a stable mounting base. As the core power source, the extension and retraction of the piston rod of the drive cylinder 12 is used to drive the entire floating unit forward or backward, performing sealing and reset actions.

[0026] The floating unit is mutually driven and connected to the piston rod end of the drive cylinder 12, specifically through a threaded or flanged connection. The floating unit is the core component of this invention, enabling large-range floating and adaptive centering, and its specific structure is as follows:

[0027] Support plate 26: The support plate 26 is fixedly connected to the end of the piston rod of the drive cylinder 12 and moves together with the piston rod. As the base frame of the floating unit, the support plate 26's main function is to install and support other floating components. A tapered locating pin 25 is installed on the support plate 26. The function of this tapered locating pin 25 is: when the floating unit resets, its tapered surface interacts with the mating hole on the guide post connecting plate 27, providing precise guidance and ensuring that the joint 34 can accurately return to its initial center position after floating, guaranteeing repeatable positioning accuracy for each operation.

[0028] Connector 34: The connector 34 is located on the side of the support plate 26 away from the drive cylinder 12, and is arranged parallel to the support plate 26. The connector 34 is a component that directly contacts the interface of the automotive air conditioning core under test. Its core function is to install a sealing head, and a sealing gasket 33 is installed inside the connector 34.

[0029] Guide post connecting plate 27: The guide post connecting plate 27 is located on the left side of the support plate 26.

[0030] Guide posts 23 and springs 22: Multiple guide posts 23 are provided between the guide post connecting plate 27 and the support plate 26. One end of the guide post 23 is fixedly connected to the guide post connecting plate 27, and the other end passes through a through hole in the support plate 26 and is connected to the connector 34 via a compression spring 22. The function of this structure is that when the cylinder drives the entire floating unit forward, and the polyurethane conical sealing head 31 contacts the test piece, the thrust of the driving cylinder 12 to continue moving forward is transmitted to the connector 34 through the spring 22, ensuring that the sealing head obtains sufficient sealing contact pressure. At the same time, if there is a positional deviation, the connector 34 can compress the spring 22 and offset relative to the guide post connecting plate 27 and the support plate 26.

[0031] Guide sleeve 24: A guide sleeve 24 is fitted over the guide post 23, and the guide sleeve 24 is precisely press-fitted into the through hole of the support plate 26. The function of the guide sleeve 24 is to provide a smooth and wear-resistant sliding support for the guide post 23, ensuring the stability and straightness of the guide post 23 during movement and preventing jamming. An axial gap of 8mm is provided between the end face of the guide sleeve 24 and the corresponding face of the guide post connecting plate 27. This gap is a key technical feature of this invention to achieve an ultra-large floating range of 8mm. It allows the guide post 23, the guide post connecting plate 27, and the components connected thereto to have a maximum relative axial movement of 8mm relative to the support plate 26.

[0032] Positioning post 21: A positioning post 21 is also provided between the support plate 26 and the connector 34. One end of the positioning post 21 is fixedly connected to the connector 34 by threads or press fitting, and the other end passes through the corresponding hole on the support plate 26. The positioning post 21 and the guide post 23 together form the guiding and connecting skeleton of the floating part, improving the rigidity and stability of the floating structure.

[0033] Polyurethane conical sealing head 31: The polyurethane conical sealing head 31 is installed on the connector 34. This sealing head is made of polyurethane material, which has excellent elasticity, wear resistance, and sealing performance. Its conical design makes it easier to insert and align when inserted into the air conditioner core interface. It fills the gap by compressing and deforming the polyurethane material, achieving a reliable airtight seal. Compared to the pneumatically tightened seals in the prior art, this structure is extremely simple, requiring no complex pneumatic drive and mechanical expansion structure. It is low-cost and easy to maintain, and can be replaced simply by screwing or pressing.

[0034] Air intake connector 32: An air intake connector 32 is installed on the side of the connector 34 opposite to the support plate 26. The air intake connector 32 is used to connect the air pipe of an external air tightness tester. During testing, compressed air or test gas enters the sealing cavity inside the sealing head through the air intake connector 32, thereby inflating and testing the automotive air conditioning core under test.

[0035] The working process of this utility model is as follows:

[0036] 1. The drive cylinder 12 is in the retracted state, and the floating unit is reset as a whole. Under the guidance of the conical positioning pin 25 and the positioning post 21, each component is in a determined initial center position.

[0037] 2. After the automotive air conditioning product is transferred to the production line, the drive cylinder 12 is activated, pushing the entire floating unit to move toward the product until the polyurethane conical sealing head 31 is inserted into the interface of the air conditioning core.

[0038] 3. If there is a positional error at the product interface, the lateral force received by the sealing head after contact will push the connector 34 to compress the spring 22, and drive the positioning post 21 and guide post 23 to move within the guide sleeve 24. Due to the 8mm gap between the guide sleeve 24 and the guide post connecting plate 27, the entire floating part (including the connector 34, sealing head, guide post connecting plate 27, positioning post 21, and guide post 23) can translate and slightly deflect relative to the support plate 26, thereby achieving a maximum adaptive floating centering of 8mm and accurately compensating for positional errors.

[0039] 4. After alignment, the drive cylinder 12 continues to provide thrust, causing the polyurethane conical sealing head 31 to elastically deform via the spring 22, tightly fitting against the inner wall of the interface to form a reliable seal. At this time, the airtightness tester introduces test gas through the air inlet connector 32 for testing.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A connector for testing the air tightness of an automotive air conditioning system, characterized in that, include: Support (11), drive cylinder (12) and floating unit; the drive cylinder (12) is installed on the support (11), and the floating unit is connected to the drive cylinder (12) for mutual driving. The floating unit includes a support plate (26), a connector (34) and a guide post connecting plate (27). The support plate (26) is fixedly connected to one side of the drive cylinder (12), and a conical positioning pin (25) is installed on the support plate (26). The connector (34) is set on one side of the support plate (26) and is parallel to the support plate (26). A polyurethane conical sealing head (31) is installed on the connector (34). A guide post (23) is provided between the guide post connecting plate (27) and the support plate (26). One end of the guide post (23) is connected to the guide post connecting plate (27), and the other end of the guide post (23) is connected to the connector (34) through a spring (22).

2. The automotive air conditioning air tightness testing connector according to claim 1, characterized in that: A positioning post (21) is also provided between the support plate (26) and the connector (34). One end of the positioning post (21) is fixedly connected to the connector (34), and the other end of the positioning post (21) passes through the support plate (26) and is connected to the guide post connecting plate (27).

3. The automotive air conditioning air tightness testing connector according to claim 1, characterized in that: The guide post (23) is covered with a guide sleeve (24), which is installed at the connection between the support plate (26) and the guide post (23).

4. The automotive air conditioning air tightness testing connector according to claim 3, characterized in that: An axial gap of 8mm is provided between the guide sleeve (24) and the support plate (26).

5. The automotive air conditioning air tightness testing connector according to claim 1, characterized in that: An air inlet connector (32) is installed on one side of the connector (34) relative to the support plate (26).

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