A kind of inspection tool for automobile air conditioning pipeline assembly

Abstract

The present application relates to the technical field of air conditioning pipeline detection equipment, and in particular to a check fixture for automobile air conditioning pipeline assembly, comprising a plurality of positioning posts, an open slot for detecting the air conditioning pipeline assembly is provided on the top wall of the positioning posts, an adjustment plate and at least two sets of limiting mechanisms for connecting the adjustment plate and each positioning post, the limiting mechanism comprising a limiting rod and an adjustment component for driving the limiting rod to slide along the length direction, an embedding groove for inserting the positioning post is provided on the adjustment plate, the positioning post is arranged perpendicular to the top wall of the adjustment plate along the length direction, a sliding groove for sliding the limiting rod is provided on the adjustment plate, a sliding groove connected to the embedding groove is provided on the installation section of the positioning post extending into the embedding groove, a limiting hole for inserting the limiting rod is provided; the designed check fixture for automobile air conditioning pipeline assembly facilitates the clamping of the positioning post and the adjustment plate through the limiting mechanism, thereby improving the installation efficiency of the positioning post; and the air conditioning pipeline assembly is conveniently detected through the open slot.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning pipeline detection equipment, and in particular to a detection fixture for automobile air-conditioning pipeline assembly. Background Art

[0002] The automobile air-conditioning system mainly includes components such as compressor, electronic clutch, condenser, pipeline assembly, condensing fan, vacuum solenoid valve, idler and control system; as one of the important parts of the automobile air-conditioning system, the pipeline assembly mainly includes aluminum tubes, joints, air-conditioning hoses, air-conditioning bellows, aluminum sleeves, filling ports, sight glasses, pressure switches, O-rings and plastic plugs. After the production of the pipeline assembly of the automobile air-conditioning system is completed, the relevant dimensions of the pipeline assembly need to be accurately inspected by inspection fixtures to ensure the quality of the pipeline assembly of the automobile air-conditioning system.

[0003] Chinese patent application number 201720247417.7 discloses a gauge for an automobile air-conditioning system pipeline assembly, including a base, on which a plurality of high-pressure delivery pipe and low-pressure delivery pipe curved positioning columns are arranged, wherein the upper ends of the first positioning column, the second positioning column, the third positioning column, the fourth positioning column, the sixth positioning column, the seventh positioning column, and the ninth positioning column are respectively provided with positioning opening grooves, the axial direction of the positioning opening groove is the same as the extension axis of the high-pressure delivery pipe, the upper ends of the fifth positioning column and the eighth positioning column are respectively provided with positioning steps, the second positioning column is also provided with a positioning opening groove, the third positioning column is also provided with a positioning step, and the bottoms of the upper steps of the fifth positioning column and the eighth positioning column are respectively provided with positioning opening grooves; a plurality of detection columns are also arranged on the base, and the upper ends of the first mounting ear detection column and the second mounting ear detection column are respectively provided with clamping positioning devices.

[0004] With respect to the above-mentioned related technologies, the applicant believes that during the installation process of the positioning column and the base, the positioning column needs to be fixed one by one by installing bolts, which makes the installation of the positioning column inconvenient and affects the installation efficiency of the positioning column. Summary of the invention

[0005] In order to improve the installation efficiency of the positioning column, the present application provides a checking fixture for an automobile air-conditioning pipeline assembly.

[0006] The present application provides a checking fixture for automobile air conditioning pipeline assembly, which adopts the following technical solution:

[0007] A check fixture for an automobile air-conditioning pipeline assembly comprises a plurality of positioning posts, the top walls of the positioning posts are provided with an open groove for detecting the air-conditioning pipeline assembly, an adjustment plate and at least two sets of limiting mechanisms for connecting the adjustment plate and each of the positioning posts, the limiting mechanisms comprising a limiting rod and an adjustment assembly for driving the limiting rod to slide, an embedding groove for inserting the positioning posts is provided on the adjustment plate, the positioning posts are arranged perpendicular to the top wall of the adjustment plate along the length direction, a sliding groove for sliding the limiting rod is provided on the adjustment plate, a sliding groove connected to the embedding groove, and a limiting hole for inserting the limiting rod is provided on the mounting section of the positioning post extending into the embedding groove.

[0008] By adopting the above technical scheme, during the installation of the positioning column, the positioning column is inserted into the embedding groove according to the installation position of the positioning column, and then the lifting mechanism is adjusted. The lifting mechanism drives the limit rod to move along the sliding groove and moves the limit rod to one side of the limit hole until the limit rod is inserted into the limit hole, thereby realizing the installation of the positioning column and the adjustment plate; the designed inspection fixture for the automobile air-conditioning pipeline assembly facilitates the clamping of the positioning column and the adjustment plate through the limit mechanism, thereby improving the installation efficiency of the positioning column; and the air-conditioning pipeline assembly is convenient for detection through the open groove.

[0009] Optionally, it also includes a reset mechanism for driving the limit rod to move toward a side away from the limit hole, the reset mechanism includes a limit ring, a first spring and a closing boss located at the notch of the sliding groove, the limit ring is located on the limit rod, the closing boss is located on the adjustment plate, the first spring is located between the limit ring and the closing boss, and the first spring causes the limit rod to tend to move toward a side away from the limit hole.

[0010] By adopting the above technical solution, the jacking mechanism is adjusted, and the jacking mechanism drives the limit rod to move along the sliding groove until the limit rod is plugged into the limit hole, so as to fix the positioning column. At the same time, the limit rod drives the limit ring to move, and the limit ring applies force to the first spring, and the first spring is deformed. When the jacking mechanism is reset, the first spring is restored, and the first spring drives the limit ring to reset, and the limit ring drives the limit rod to reset. The designed reset mechanism is convenient for applying force to the limit rod, so that the limit rod is separated from the limit hole, thereby realizing the reset of the limit rod and facilitating the disassembly and replacement of the positioning column.

[0011] Optionally, it also includes a reset mechanism for driving the limit rod to move toward the side away from the limit hole, the reset mechanism includes a second spring and a sliding block located on the side wall of the limit rod, the groove wall of the sliding groove is provided with a sliding groove for the sliding block to slide, the sliding groove is arranged along the length direction of the sliding groove, the second spring is located in the sliding groove, and the second spring causes the limit rod to tend to move toward the side away from the limit hole.

[0012] By adopting the above technical solution, the jacking mechanism is adjusted, and the jacking mechanism drives the limit rod to move along the sliding groove until the limit rod is plugged into the limit hole, so that the positioning column is fixed. At the same time, the limit rod drives the sliding block to slide along the sliding groove, and the sliding block applies force to the second spring, and the second spring is deformed. When the jacking mechanism is reset, the second spring is restored, and the second spring drives the limit ring to reset, and the limit ring drives the limit rod to reset. The designed reset mechanism is convenient for applying force to the limit rod, so that the limit rod is separated from the limit hole, thereby realizing the reset of the limit rod and facilitating the disassembly and replacement of the positioning column.

[0013] Optionally, the adjustment assembly includes a push rod for pushing the limiting rod to slide toward one side of the limiting hole, and an adjustment groove for the push rod to slide is opened on the adjustment plate, and the sliding groove is connected to the adjustment groove at one end away from the limiting hole.

[0014] By adopting the above technical solution, the push rod is pushed, the push rod applies force to the limit rod, and the limit rod slides along the sliding groove to achieve the matching connection between the limit rod and the limit hole; the designed adjustment component facilitates the application of force to the limit rod through the push rod, so as to achieve the sliding of the limit rod along the sliding groove, thereby achieving the limitation of the positioning column.

[0015] Optionally, a base is provided on the side of the adjustment plate away from the positioning column, and the push rod is connected to the base at one end away from the positioning column. At least three mounting holes are provided on the base, and each mounting hole is provided with a third spring that causes the adjustment plate to move toward the side of the base.

[0016] When the adjusting plate is pushed to move away from the base, the third spring is stretched, and the base drives the push rod to slide along the adjusting groove. When the push rod is separated from the limit rod, the reset mechanism works, and the reset mechanism applies force to the limit rod, and the limit rod slides along the sliding groove until the limit rod is separated from the limit hole, so as to unlock the positioning column and the adjusting plate. When the force applied to the adjusting plate stops, the third spring is reset, and the third spring drives the adjusting plate to move toward one side of the base, and the base drives the push rod to move. When the push rod contacts the limit rod, the push rod applies force to the limit rod, so that the limit rod moves toward one side of the limit hole, and moves until the limit rod is plugged with the limit hole, and the positioning column is fixed on the adjusting plate; the designed base is convenient for driving multiple push rods to move synchronously, thereby realizing the synchronous disassembly and assembly of multiple positioning columns, and improving the efficiency of installation and disassembly of the positioning columns; through the third spring, it is convenient to apply force to the adjusting plate, so that the adjusting plate moves toward one side of the base, thereby realizing the matching plugging of the limit rod and the limit hole.

[0017] Optionally, two groups of lifting mechanisms are further included to move the adjustment plate away from the base, the lifting mechanism includes a bidirectional screw and two guide sliders for driving the adjustment plate to move away from the base, the base is provided with a guide groove for the guide slider to slide, the guide groove passes through the opposite side walls of the base, the bidirectional screw passes through the guide slider, and the positive thread section of the bidirectional screw and the negative thread section of the bidirectional screw are respectively threadedly connected to the guide slider.

[0018] By adopting the above technical solution, the bidirectional screw is rotated, and the bidirectional screw drives the guide slider to slide along the guide slide groove. The guide slider applies force to the adjustment plate, causing the adjustment plate to move away from the base. The base drives the push rod to move until the push rod is separated from the limit rod. The first spring or the second spring is restored to drive the limit rod to move until the limit rod is separated from the plug-in slot, thereby facilitating the disassembly of the positioning column. The designed lifting mechanism is convenient for adjusting the distance between the adjustment plate and the base, and then adjusting the length of the push rod extending into the adjustment slot to achieve the disassembly of the positioning column.

[0019] Optionally, the guide slider includes a sliding section and a supporting section abutting against the bottom wall of the adjustment plate, the sliding section is slidingly connected to the guide slide groove, and the sliding section is threadedly connected to the bidirectional screw, and the distance between the two supporting sections gradually decreases from high to low.

[0020] By adopting the above technical solution, the guide slider is arranged in sections, and its sliding section is easy to slide along the guide groove. At the same time, it is convenient to adjust the position of the support section in conjunction with the bidirectional screw; its support section is convenient to apply force to the adjustment plate, thereby increasing the distance between the adjustment plate and the base.

[0021] Optionally, a mounting block is provided in the guide groove, the mounting block is fixedly connected to the base, and the connection between the bidirectional screw positive thread section and the bidirectional screw reverse thread section is rotatably connected to the mounting block.

[0022] By adopting the above technical solution, the designed mounting block is convenient for mounting the bidirectional screw rod, so that the bidirectional screw rod is rotatably connected to the adjusting plate.

[0023] Optionally, positioning holes are provided at the corners of the embedding groove.

[0024] By adopting the above technical solution, the designed positioning hole makes it easy to open the embedding groove.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The designed inspection fixture for automobile air-conditioning pipe assembly facilitates the clamping of the positioning column and the adjustment plate through the limit mechanism, thereby improving the installation efficiency of the positioning column; the opening groove facilitates the inspection of the air-conditioning pipe assembly;

[0027] 2. The designed inspection fixture for automobile air conditioning pipe assembly can apply force to the limit rod through the reset mechanism, so that the limit rod is separated from the limit hole, and the limit rod is reset, which is convenient for disassembly and replacement of the positioning column;

[0028] 3. The designed inspection fixture for automobile air-conditioning pipeline assembly is convenient for driving multiple push rods to move synchronously through the base, thereby realizing the synchronous disassembly and assembly of multiple positioning columns, improving the efficiency of installation and disassembly of the positioning columns; through the third spring, it is convenient to apply force to the adjustment plate, so that the adjustment plate moves to one side of the base, thereby realizing the matching and plugging of the limit rod and the limit hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the inspection fixture for the automobile air conditioning pipeline assembly of the present application;

[0030] Figure 2 It is a cross-sectional view of the inspection fixture for automobile air-conditioning pipe assembly of the present application, which is intended to illustrate the lifting mechanism;

[0031] Figure 3 It is a cross-sectional view of the inspection fixture for the automobile air-conditioning pipe assembly of the present application, which is intended to illustrate the third spring;

[0032] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0033] Figure 5 It is a cross-sectional view of the inspection fixture for automobile air-conditioning pipe assembly of the present application, which is intended to illustrate the reset mechanism of Example 1;

[0034] Figure 6 yes Figure 5 A magnified schematic diagram of part B;

[0035] Figure 7 It is a cross-sectional view of the inspection fixture for automobile air-conditioning pipe assembly of the present application, which is intended to illustrate the reset mechanism of Example 2;

[0036] Figure 8 yes Figure 7 Enlarged schematic diagram of part C of FIG.

[0037] Explanation of the accompanying drawings: 1. base; 2. adjustment plate; 3. positioning column; 31. opening groove; 32. limiting hole; 4. limiting mechanism; 41. reset mechanism; 411. limiting ring; 412. closing boss; 413. first spring; 414. sliding groove; 415. sliding block; 416. second spring; 42. adjustment assembly; 421. adjustment groove; 422. push rod; 4221. moving section; 4222. abutting section; 43. sliding groove; 44. limiting rod; 45. embedding groove; 46. positioning hole; 5. lifting mechanism; 51. guide slide groove; 52. guide slider; 521. supporting section; 522. sliding section; 53. bidirectional screw; 531. turning handle; 54. mounting block; 6. third spring; 61. mounting hole; 62. telescopic rod; 621. fixed section; 622. sliding section. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] Example 1

[0040] The present application embodiment discloses a test fixture for automobile air conditioning pipeline assembly. Figure 1 and Figure 2 A checking fixture for an automobile air-conditioning pipeline assembly comprises a base 1, an adjusting plate 2, a plurality of positioning posts 3 and at least two sets of limiting mechanisms 4 for connecting the adjusting plate 2 and each positioning post 3. The number of the positioning posts 3 in the present application is determined according to the shape of the air-conditioning pipeline assembly, as long as the air-conditioning pipeline assembly to be tested is easy to detect accurately; an opening groove 31 for detecting the air-conditioning pipeline assembly is opened on the top wall of the positioning post 3, and the shape of the opening groove 31 is determined according to the shape of the detection position of the air-conditioning pipeline assembly; the adjusting plate 2 is located between the positioning post 3 and the base 1.

[0041] Reference Figure 3 and Figure 4At least three mounting holes 61 are provided on the base 1, and a third spring 6 is provided in each mounting hole 61 to make the adjustment plate 2 tend to move toward one side of the base 1, one end of the third spring 6 is connected to the bottom wall of the mounting hole 61, and a concave hole directly opposite to the mounting hole 61 is provided on the bottom wall of the adjustment plate 2, and the end of the third spring 6 away from the base 1 is connected to the bottom wall of the concave hole; a telescopic rod 62 is provided in the third spring 6, and the telescopic rod 62 includes a fixed section 621 set in a hollow and a sliding section 622 sliding along the inner cavity of the fixed section 621, and the fixed section 621 is connected to the base 1 at one end away from the moving section 62, and the sliding section 622 is away from the moving section 62. One end of the fixed section 621 is integrally connected to the bottom wall of the adjustment plate 2; in the present embodiment, there can be three, four or six mounting holes 61, as long as the third spring 6 can achieve stable support for the adjustment plate 2, and four mounting holes 61 are provided in the present application; each positioning column 3 in the present application can be connected to the adjustment plate 2 through two sets of limiting mechanisms 4, or three sets of limiting mechanisms 4, or four sets of limiting mechanisms 4, as long as a stable connection between the positioning column 3 and the adjustment plate 2 is achieved, and each positioning column 3 in the present embodiment is connected to the adjustment plate 2 through two sets of limiting mechanisms 4.

[0042] Reference Figure 5 and Figure 6 The limiting mechanism 4 includes a limiting rod 44 and an adjusting component 42 for driving the limiting rod 44 to slide. The adjusting plate 2 is provided with an embedding groove 45 for inserting the positioning column 3. In order to improve the accuracy of the opening position of the embedding groove 45, a positioning hole 46 is opened at the corner of the embedding groove 45. The positioning hole 46 is opened first, and the embedding groove 45 is opened according to the position of the positioning hole 46 to ensure the accurate opening of the position of the embedding groove 45; the positioning column 3 is arranged perpendicular to the top wall of the adjusting plate 2 along the length direction, and the adjusting plate 2 is provided with a sliding groove 43 for the limiting rod 44 to slide. The length direction of the sliding groove 43 is perpendicular to the axial direction of the positioning hole 46, and the embedding groove 45 is connected to the sliding groove 43.

[0043] Reference Figure 7 and Figure 8 A limiting hole 32 for inserting the limiting rod 44 is provided on the installation section where the positioning column 3 extends into the embedding groove 45.

[0044] Reference Figure 5 and Figure 6In order to facilitate the separation of the limit rod 44 from the limit hole 32, the present application also includes a reset mechanism 41 for driving the limit rod 44 to move to the side away from the limit hole 32, the reset mechanism 41 includes a limit ring 411, a first spring 413 and a closing boss 412 located at the notch of the sliding groove 43, the closing boss 412 is located on the adjustment plate 2, and the closing boss 412 is integrally connected to the adjustment plate 2; the limit ring 411 is located on the limit rod 44, and the limit ring 411 is integrally connected to the limit rod 44; the first spring 413 is located between the limit ring 411 and the closing boss 412, one end of the first spring 413 is connected to the limit ring 411, and the other end is connected to the closing boss 412, and the first spring 413 causes the limit rod 44 to tend to move to the side away from the limit hole 32.

[0045] Reference Figure 6 The adjusting assembly 42 includes a push rod 422 for pushing the limiting rod 44 to slide toward the limiting hole 32. The end of the push rod 422 away from the positioning column 3 is connected to the base 1. An adjusting groove 421 for the push rod 422 to slide is provided on the adjusting plate 2. The adjusting groove 421 is connected to the end of the sliding groove 43 away from the limiting hole 32. The adjusting groove 421 in the present application can be set vertically or tilted. As long as the push rod 422 pushes the limiting rod 44 to move along the sliding groove 43, and the limiting rod 44 is plugged into the limiting hole 32, the push rod 422 in this embodiment is arranged along the length direction is arranged perpendicular to the horizontal plane; in order to facilitate the push rod 422 to push the limiting rod 44 to move along the sliding groove 43, the push rod 422 in the present application includes an integrally connected abutment section 4222 and a movement section 4221. In the present embodiment, the vertical cross-section of the push rod 422 is arranged in a right-angle trapezoid, and the inclined side wall of the push rod 422 abuts against the limiting rod 44, the movement section 4221 is integrally connected to the base 1 at one end away from the abutment section 4222, the distance between the abutment section 4222 and the limiting rod 44 gradually decreases from high to low, and the limiting rod 44 is spherically arranged near one end of the abutment section 4222.

[0046] Reference Figure 2In order to facilitate the adjustment of the distance between the base 1 and the adjustment plate 2, the present application further includes a lifting mechanism 5, which includes a bidirectional screw 53 and two guide sliders 52 for driving the adjustment plate 2 to move away from the base 1. The guide slider 52 includes a sliding section 522 and a support section 521 abutting against the bottom wall of the adjustment plate 2. The distance between the two support sections 521 located in the same guide slot 51 gradually decreases from high to low. In this embodiment, the vertical cross-section of the guide slider 52 is arranged in a right-angle trapezoidal shape, and the inclined side wall of the guide slider 52 abuts against the bottom wall of the adjustment plate 2; a guide slot 51 for the sliding section 522 to slide is provided on the base 1, and the guide slot 51 passes through the opposite side walls of the base 1. 1 is provided with a mounting block 54, which is integrally connected with the base 1 and is located in the middle of the guide slide groove 51; the bidirectional screw 53 passes through the two guide slide blocks 52 of the mounting block 54, and the connection between the positive thread section of the bidirectional screw 53 and the reverse thread section of the bidirectional screw 53 is rotatably connected with the mounting block 54, and the positive thread section of the bidirectional screw 53 and the reverse thread section of the bidirectional screw 53 are respectively threadedly connected with the guide slide block 52. In order to facilitate the rotation of the bidirectional screw 53, a rotating handle 531 is integrally connected to the bidirectional screw 53. In order to facilitate the fitting of the adjustment plate 2 with the base 1, it is necessary to separate the support section 521 from the adjustment plate 2, so a spacing for the support section 521 to be placed is reserved between the rotating handle 531 and the base 1.

[0047] The implementation principle of the inspection fixture for an automobile air-conditioning pipeline assembly according to the embodiment of the present application is as follows: during the installation of the positioning column 3, the positioning column 3 is inserted into the embedding groove 45 according to the installation position of the positioning column 3, and then the rotating handle 531 is rotated, and the rotating handle 531 drives the two guide sliders 52 to move away from each other. Under the action of the third spring 6 and the gravity of the adjusting plate 2, the adjusting plate 2 and the base 1 are close to each other, and the base 1 drives the push rod 422 to move toward the side of the limiting rod 44. When the push rod 422 moves to contact the limiting rod 44, the push rod 422 applies force to the limiting rod 44, and the limiting rod 44 moves along the sliding groove 43 of the limiting rod 44 until the limiting rod 44 is plugged into the limiting hole 32, thereby realizing the installation of the positioning column 3. At the same time, the limiting rod 44 drives the limiting ring 411 to move, and the limiting ring 411 applies force to the first spring 413, and the first spring 413 is deformed, which is convenient for the limiting rod 44 to reset.

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is that, referring to Figure 7 and Figure 8The reset mechanism 41 includes a second spring 416 and a sliding block 415 located on the side wall of the limiting rod 44. The sliding block 415 is integrally connected to the limiting rod 44. A sliding groove 414 for the sliding block 415 to slide is provided on the groove wall of the sliding groove 43. The sliding groove 414 is arranged along the length direction of the sliding groove 43. The second spring 416 is located in the sliding groove 414, and the second spring 416 makes the limiting rod 44 tend to move to the side away from the limiting hole 32. One end of the second spring 416 is connected to the groove wall of the sliding groove 414, and the other end is connected to the sliding block 415.

[0050] The implementation principle of the inspection fixture for automobile air-conditioning pipeline assembly of the embodiment of the present application is as follows: during the installation of the positioning column 3, the positioning column 3 is inserted into the embedding groove 45 according to the installation position of the positioning column 3, and then the rotating handle 531 is rotated, and the rotating handle 531 drives the two guide sliders 52 to move away from each other. Under the action of the gravity of the third spring 6 and the adjusting plate 2, the adjusting plate 2 and the base 1 are close to each other, and the base 1 drives the push rod 422 to move toward the side of the limit rod 44. When the push rod 422 moves to contact the limit rod 44, the push rod 422 applies force to the limit rod 44, and the limit rod 44 moves along the sliding groove 43 along the limit rod 44 until the limit rod 44 is plugged into the limit hole 32, thereby realizing the installation of the positioning column 3; at the same time, the limit rod 44 drives the sliding block 415 to move and slide along the sliding groove 414, and the sliding block 415 applies force to the second spring 416, and the second spring 416 is deformed, which is convenient for the limit rod 44 to reset.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A testing fixture for automobile air-conditioning pipeline assembly, comprising a plurality of positioning columns (3), wherein the top wall of the positioning columns (3) is provided with an opening groove (31) for testing the air-conditioning pipeline assembly, characterized in that: It also includes an adjustment plate (2) and at least two groups of limiting mechanisms (4) for connecting the adjustment plate (2) and each of the positioning columns (3), the limiting mechanism (4) including a limiting rod (44) and an adjustment component (42) for driving the limiting rod (44) to slide, the adjustment plate (2) is provided with an embedding groove (45) for the positioning column (3) to be inserted, the positioning column (3) is arranged perpendicular to the top wall of the adjustment plate (2) along the length direction, the adjustment plate (2) is provided with a sliding groove (43) for the limiting rod (44) to slide, the sliding groove (43) is connected to the embedding groove (45), and a limiting hole (32) for the limiting rod (44) to be inserted is provided on the installation section of the positioning column (3) extending into the embedding groove (45); The adjustment assembly (42) comprises a push rod (422) for pushing the limit rod (44) to slide toward one side of the limit hole (32); an adjustment groove (421) for the push rod (422) to slide is provided on the adjustment plate (2); an end of the sliding groove (43) away from the limit hole (32) is connected to the adjustment groove (421); the vertical cross section of the push rod (422) is arranged in a right-angle trapezoidal shape, and the inclined side wall of the push rod (422) abuts against the limit rod (44); A base (1) is provided on the side of the adjustment plate (2) away from the positioning column (3); one end of the push rod (422) away from the positioning column (3) is connected to the base (1); at least three mounting holes (61) are provided on the base (1); each mounting hole (61) is provided with a third spring (6) for causing the adjustment plate (2) to move toward one side of the base (1); The invention also comprises two groups of lifting mechanisms (5) for moving the adjusting plate (2) away from the base (1), the lifting mechanisms (5) comprising a bidirectional screw (53) and two guide slide blocks (52) for driving the adjusting plate (2) to move away from the base (1), the base (1) being provided with a guide slide groove (51) for the guide slide blocks (52) to slide, the guide slide groove (51) penetrating two opposite side walls of the base (1), the bidirectional screw (53) penetrating the guide slide blocks (52), and the positive thread section of the bidirectional screw (53) and the negative thread section of the bidirectional screw (53) being respectively threadedly connected to the guide slide blocks (52); The guide slider (52) comprises a sliding section (522) and a supporting section (521) abutting against the bottom wall of the adjustment plate (2); the sliding section (522) is slidingly connected to the guide slide groove (51), and the sliding section (522) is threadedly connected to the bidirectional screw (53); the spacing between the two supporting sections (521) gradually decreases from high to low; the vertical cross-section of the guide slider (52) is arranged in a right-angle trapezoidal shape, and the inclined side wall of the guide slider (52) abuts against the bottom wall of the adjustment plate (2).

2. The inspection tool for automobile air conditioning pipeline assembly according to claim 1, characterized in that: The invention also includes a reset mechanism (41) for driving the limit rod (44) to move toward a side away from the limit hole (32), wherein the reset mechanism (41) includes a limit ring (411), a first spring (413) and a closing boss (412) located at the notch of the sliding groove (43), wherein the limit ring (411) is located on the limit rod (44), the closing boss (412) is located on the adjustment plate (2), the first spring (413) is located between the limit ring (411) and the closing boss (412), and the first spring (413) causes the limit rod (44) to tend to move toward a side away from the limit hole (32).

3. The inspection tool for automobile air conditioning pipeline assembly according to claim 1, characterized in that: The invention also includes a reset mechanism (41) for driving the limit rod (44) to move toward a side away from the limit hole (32); the reset mechanism (41) includes a second spring (416) and a sliding block (415) located on the side wall of the limit rod (44); a sliding groove (414) for the sliding block (415) to slide is provided on the groove wall of the sliding groove (43); the sliding groove (414) is arranged along the length direction of the sliding groove (43); the second spring (416) is located in the sliding groove (414), and the second spring (416) causes the limit rod (44) to tend to move toward a side away from the limit hole (32).

4. The inspection tool for automobile air conditioning pipeline assembly according to claim 1, characterized in that: A mounting block (54) is arranged in the guide slide groove (51), the mounting block (54) is fixedly connected to the base (1), and the connection between the positive thread section of the bidirectional screw (53) and the negative thread section of the bidirectional screw (53) is rotatably connected to the mounting block (54).

5. The inspection tool for automobile air conditioning pipeline assembly according to claim 1, characterized in that: Positioning holes (46) are provided at the corners of the embedding groove (45).

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