Automobile suspension support rod detection device

Abstract

The present application relates to the technical fields of suspension support rod weld joint detection, and discloses an automobile suspension support rod detection equipment for detecting the sealing performance of the sleeve weld joint of the automobile suspension support rod; a gas pressure detection cavity is enclosed between the first annular sealing ring, the second annular sealing ring and the outer wall of the support rod sleeve; a first inflation port is formed on one side of the support rod sleeve and communicates with the gas pressure detection cavity; the first inflation port is connected with an external inflation pump through a pipeline; the air tightness of the support rod sleeve weld joint is determined according to the change of the internal gas pressure of the gas pressure detection cavity; when the present application is used for detection, high-pressure gas is filled into the gas pressure detection cavity; the change of the internal gas pressure of the cavity is detected by a gas pressure sensor; whether the weld joint has a gas leakage defect can be determined; compared with the traditional detection method of manually observing bubbles by water immersion, the present application does not need manual operation one by one; a plurality of support rod sleeves can be simultaneously detected in batches; and the accuracy of the detection result is improved.

Description

Technical Field

[0001] This invention relates to the field of suspension support rod weld inspection technology, specifically to automotive suspension support rod inspection equipment. Background Technology

[0002] The suspension support rod is a key load-bearing component in the automotive suspension system. It is mainly composed of a sleeve and a piston rod. Some sleeves are formed by segmented welding. The sealing of the weld directly affects the overall performance and service life of the suspension support rod. If there are defects such as pores or gaps in the weld, moisture and dust from the outside can easily enter the support rod during use, accelerating the wear of the internal oil seal and piston rod. This can eventually lead to problems such as oil leakage and damping failure, thus affecting the stability and safety of the vehicle. Therefore, after the suspension support rod is manufactured, the sealing of the sleeve weld must be tested.

[0003] Current testing methods mostly involve manually immersing the entire support rod in water and observing for air bubbles to determine if the weld is leaking. This method is not only inefficient and labor-intensive, but also prone to missing tiny air bubbles caused by minute gaps, making the accuracy of the test results highly susceptible to human factors. Some equipment uses pneumatic testing, but existing pneumatic testing methods can only detect the sealing of the outer side of the weld and cannot detect tiny defects that connect the inner cavity of the sleeve to the outside, resulting in insufficient testing coverage.

[0004] Therefore, this application proposes an automotive suspension support rod testing device to solve the problems of low testing efficiency, high missed detection rate, and incomplete testing range in traditional testing methods, and to achieve efficient and accurate testing of the sealing performance of automotive suspension support rod sleeve welds. Summary of the Invention

[0005] The purpose of this invention is to provide an automotive suspension support rod testing device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automotive suspension support rod testing device for testing the sealing performance of the weld seam of an automotive suspension support rod sleeve, comprising a base and a worktable disposed on the top of the base, wherein a plurality of support rod positioning components are disposed on the surface of the worktable along the X-axis direction, and a support rod top sealing component that moves along the Y-axis direction is disposed on the surface of the worktable corresponding to the position of each support rod positioning component, wherein the support rod top sealing component is used to seal the top of the support rod sleeve;

[0007] The support rod positioning assembly includes a positioning plate mounted on the workbench. A detection core is installed at the center of the positioning plate. A detection cavity and a through hole are formed from top to bottom at the center of the detection core. The support rod sleeve is inserted into the detection cavity and the through hole from top to bottom.

[0008] The inner wall of the detection chamber is provided with a first annular groove, a first annular sealing ring is provided in the first annular groove, and a first annular inflation chamber is provided in the inner wall of the first annular groove.

[0009] The inner wall of the through hole is provided with a second annular groove, a second annular sealing ring is provided in the second annular groove, and a second annular air filling cavity is provided in the inner wall of the second annular groove.

[0010] After the support rod sleeve is inserted into the detection cavity and through hole, the weld on the surface of the support rod sleeve is located between the first annular sealing ring and the second annular sealing ring. The first annular sealing ring, the second annular sealing ring and the outer wall of the support rod sleeve enclose a pressure detection cavity. A first inflation port communicating with the pressure detection cavity is opened on one side of the support rod sleeve. The first inflation port is connected to an external inflation pump through a pipe. The airtightness of the weld of the support rod sleeve is judged according to the change of air pressure inside the pressure detection cavity.

[0011] The air pressure detection chamber is equipped with an air pressure sensor, which is used to detect changes in air pressure inside the air pressure detection chamber.

[0012] Both the first annular inflation chamber and the second annular inflation chamber are connected to an external inflation pump via pipes.

[0013] After air is injected into the first annular air chamber, the first annular sealing ring is compressed inward under the action of air pressure to hug the surface of the support rod sleeve, thereby achieving a sealing effect.

[0014] After air is injected into the second annular inflation chamber, the second annular sealing ring is compressed inward under the action of air pressure to hug the surface of the support rod sleeve, thereby achieving a sealing effect.

[0015] The bottom of the detection core is provided with an extension cylinder that communicates with the through hole, and the end of the support rod sleeve extends into the extension cylinder through the detection cavity and the through hole.

[0016] The extension cylinder has a corrugated pipe at its bottom and an air extraction pipe at its end, the end of which is connected to an external air pump.

[0017] The extension cylinder has an air extraction hole at the center of its bottom, and the extension cylinder and the corrugated pipe are connected through the air extraction hole.

[0018] The bottom of the inner wall of the extension cylinder is provided with a radially arranged air guide groove that communicates with the air extraction hole.

[0019] The support rod top sealing assembly includes a frame slidably mounted on the workbench. The inner side of the frame is provided with a support plate that slides along the Z-axis. The top of the frame is provided with a first hydraulic rod for driving the support plate to slide along the Z-axis. The output end of the first hydraulic rod is connected to the support plate. A vertical rod is provided at the center of the lower surface of the support plate. A sealing plate is provided at the end of the vertical rod. A sealing rubber head that mates with the top port of the support rod sleeve is provided on the lower surface of the sealing plate.

[0020] Y-axis slides are provided at the bottom of both sides of the frame, and Y-axis guide rails that cooperate with the Y-axis slides are provided on the surface of the worktable. The frame slides along the Y-axis direction through the cooperation of the Y-axis slides and the Y-axis guide rails.

[0021] The rear side of the workbench surface is provided with a second hydraulic rod that drives the frame to slide along the Y-axis direction, and the output end of the second hydraulic rod is connected to the back of the frame.

[0022] The support plate has guide rods that penetrate the frame at each of its four corners, and a guide sleeve is provided at the top of the frame corresponding to the position of the guide rod. The guide rod moves along the Z-axis through the guide sleeve.

[0023] The workbench has a top frame at its edge, and the front of the top frame is hollowed out to correspond to the positions of the top sealing component and the positioning component of the support rod.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention sets a first annular sealing ring and a second annular sealing ring in the detection cavity and through hole of the detection core, respectively, to enclose the weld of the support rod sleeve between the two to form an independent air pressure detection cavity. During detection, high-pressure gas is filled into the air pressure detection cavity, and the gas pressure sensor detects the change in air pressure in the cavity to determine whether there is a leak defect in the weld. Compared with the traditional detection method of manually soaking in water to observe bubbles, it does not require manual operation one by one, and can perform batch detection on multiple support rod sleeves at the same time, thus improving the accuracy of the detection results.

[0026] 2. This invention connects a bellows and an air pump to the bottom of the extension cylinder. During the inspection process, when the pressure detection chamber on the outside of the weld is filled with high-pressure gas, the air pump can draw the inside of the support rod sleeve into a negative pressure state. If there is a tiny defect in the weld that connects the inner cavity of the sleeve to the outside, the high-pressure gas in the pressure detection chamber will flow into the negative pressure inner cavity of the sleeve along the defect. The pressure in the pressure detection chamber will change rapidly, which can accurately detect tiny connecting defects that are not visible to the naked eye and are difficult to detect by traditional external pressure detection, thus expanding the detection coverage and improving the accuracy of the detection.

[0027] 3. This invention controls the expansion and sealing of the first and second annular sealing rings by inflating them. Compared with the traditional method of sealing by the elasticity of the sealing rings themselves, this invention can adjust the degree of expansion according to different dimensional tolerances, has better adaptability to support rod sleeves with different dimensional errors, and has more stable and reliable sealing performance, further ensuring the accuracy of the test results. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall axial structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the first direction axis side structure of the worktable of the present invention;

[0030] Figure 3 This is a schematic diagram of the second-direction axial structure of the worktable of the present invention;

[0031] Figure 4 This is a schematic diagram of the third-direction axis structure of the worktable of the present invention;

[0032] Figure 5 This is a schematic diagram of the first direction axial structure of the support rod positioning assembly of the present invention;

[0033] Figure 6 This is a schematic diagram of the second-direction axial structure of the support rod positioning assembly of the present invention;

[0034] Figure 7 This is a schematic diagram of the main structure of the support rod positioning assembly of the present invention;

[0035] Figure 8 This is a cross-sectional view of the support rod positioning assembly of the present invention;

[0036] Figure 9 for Figure 8 Enlarged structural diagram of section A in the middle;

[0037] Figure 10 This is an exploded view of the support rod positioning assembly of the present invention;

[0038] Figure 11 This is a schematic diagram of the first direction axial structure of the detection core of the present invention;

[0039] Figure 12 This is a schematic diagram of the second-direction axial structure of the detection core of the present invention;

[0040] Figure 13 This is a schematic diagram of the main structure of the detection core of the present invention;

[0041] Figure 14 This is a schematic diagram of the cross-sectional structure of the detection core of the present invention.

[0042] In the diagram: 100, base; 200, workbench; 300, top frame; 400, top sealing assembly for support rod; 401, frame; 402, support plate; 403, first hydraulic rod; 404, guide rod; 405, sealing plate; 406, sealing rubber head; 407, Y-axis guide rail; 408, Y-axis slide; 409, second hydraulic rod; 500, support rod positioning assembly; 510, positioning plate; 520, detection core; 521, detection chamber; 522, first inflation port; 523, first annular inflation chamber; 524, first annular sealing ring; 525, second annular inflation chamber; 526, second annular sealing ring; 527, through hole; 530, extension tube; 540, bellows; 600, extraction pipe; 700, support rod sleeve. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] Please see Figure 1-14This invention provides an automotive suspension support rod testing device for testing the sealing performance of the weld seam of an automotive suspension support rod sleeve. The device includes a base 100 and a worktable 200 mounted on top of the base 100. The worktable 200 has several support rod positioning assemblies 500 arranged along the X-axis. A support rod top sealing assembly 400, movable along the Y-axis, is provided on the worktable 200 corresponding to the position of each support rod positioning assembly 500. The support rod top sealing assembly 400 is used to seal the top of the support rod sleeve 700. Each support rod positioning assembly 500 includes a positioning plate 510 mounted on the worktable 200. A detection core 520 is mounted at the axis of the positioning plate 510. The detection core 520 has a detection cavity 521 and a through hole 527 formed from top to bottom at its axis. The support rod sleeve 700 is inserted from top to bottom into the detection cavity 521 and the through hole 527. A first annular groove is formed on the inner wall of the support rod sleeve 700, and a first annular sealing ring 524 is provided in the first annular groove. A first annular inflation chamber 523 is formed on the inner wall of the first annular groove. A second annular groove is formed on the inner wall of the through hole 527, and a second annular sealing ring 526 is provided in the second annular groove. A second annular inflation chamber 525 is formed on the inner wall of the second annular groove. After the support rod sleeve 700 is inserted into the detection chamber 521 and the through hole 527, the weld on the surface of the support rod sleeve 700 is located between the first annular sealing ring 524 and the second annular sealing ring 526. A pressure detection chamber is enclosed between the first annular sealing ring 524, the second annular sealing ring 526 and the outer wall of the support rod sleeve 700. A first inflation port 522 is formed on one side of the support rod sleeve 700, which communicates with the pressure detection chamber. The first inflation port 522 is connected to an external inflation pump through a pipe. The airtightness of the weld of the support rod sleeve 700 is judged according to the change of the air pressure inside the pressure detection chamber.

[0045] Specifically, before testing, the automobile suspension support rod sleeve 700 to be tested is inserted from top to bottom into the testing cavity 521 and through hole 527 of the testing core 510, so that the weld to be tested on the surface of the support rod sleeve 700 is just between the first annular sealing ring 524 and the second annular sealing ring 526. Then, compressed gas is injected into the first annular inflation cavity 523 and the second annular inflation cavity 525 respectively (after the gas is injected, the valve on the inflation pipeline is closed). Under the action of air pressure, the first annular sealing ring 524 and the second annular sealing ring 526 expand and contract inward, tightly fitting against the outer wall of the support rod sleeve 700, completing the sealing of the upper and lower sides of the weld, forming a closed air pressure testing cavity;

[0046] Then, high-pressure gas with a set pressure is injected into the pressure detection chamber through the first inflation port 522 (after the gas is injected, the valve on the inflation pipeline is closed). After maintaining the pressure for a period of time, the pressure sensor in the pressure detection chamber is used to detect the pressure change. If the pressure is stable within the set range, it indicates that the weld is well sealed; if the pressure drops significantly, it indicates that there is a leak in the weld.

[0047] After a single support rod sleeve 700 is inspected, the first annular inflation chamber 523 and the second annular inflation chamber 525 are deflated, and the first annular sealing ring 524 and the second annular sealing ring 526 lose their tension. At this time, the inspected support rod sleeve 700 can be pulled out from the inspection core 521 for the next inspection. Meanwhile, multiple support rod positioning assemblies 400 are arranged along the X-axis, which can simultaneously inspect multiple support rod sleeves 700, effectively improving inspection efficiency.

[0048] The pressure detection chamber is equipped with a pressure sensor to detect changes in pressure within the chamber. Specifically, high-pressure gas with a set pressure is introduced into the chamber through the first inflation port 522 (after inflation, the valve on the inflation line is closed). After maintaining the pressure for a period of time, the pressure sensor detects the pressure changes. If the pressure remains stable within the set range, it indicates that the weld is well-sealed; if the pressure drops significantly, it indicates that there is a leak in the weld. The defect can be judged directly based on the numerical changes, without the need for manual visual inspection, thus avoiding missed detections and misjudgments due to human factors.

[0049] Both the first annular inflation chamber 523 and the second annular inflation chamber 525 are connected to an external air pump via pipes. After air is injected into the first annular inflation chamber 523, the first annular sealing ring 524 is compressed inward under the action of air pressure, tightly gripping the surface of the support rod sleeve 700, thus achieving a sealing effect. After air is injected into the second annular inflation chamber 525, the second annular sealing ring 526 is compressed inward under the action of air pressure, tightly gripping the surface of the support rod sleeve 700, thus achieving a sealing effect. Specifically, when it is necessary to inspect the weld of the support rod sleeve 700, the automotive suspension support rod sleeve 700 to be inspected is first inserted from top to bottom into the inspection cavity 521 and through hole 527 of the inspection core 510, so that the support rod sleeve... The weld seam to be inspected on surface 700 is precisely positioned between the first annular sealing ring 524 and the second annular sealing ring 526. Subsequently, compressed gas is injected into the first annular inflation chamber 523 and the second annular inflation chamber 525, respectively. After inflation, the valve on the inflation pipe is closed to maintain stable air pressure in the two inflation chambers. This ensures that the first annular sealing ring 524 and the second annular sealing ring 526 remain in a tightly sealed state, preventing loosening due to air pressure leakage and thus guaranteeing the stability of the sealing effect. This inflation-expansion sealing method allows for adjustment of the inflation pressure based on the actual dimensional tolerance of the support rod sleeve 700, making it suitable for workpieces with minor dimensional errors. It avoids issues such as inadequate sealing due to small workpiece size or inability to insert workpieces due to large size, resulting in better adaptability.

[0050] The detection core 520 has an extension cylinder 530 at its bottom that communicates with the through hole 527. The end of the support rod sleeve 700 extends into the extension cylinder 530 through the detection cavity 521 and the through hole 527. The bottom of the extension cylinder 530 has a bellows 540, and the end of the bellows 540 has an air extraction pipe 600. The end of the air extraction pipe 600 is connected to an external air pump. An air extraction hole is opened at the center of the bottom of the extension cylinder 530. The extension cylinder 530 and the bellows 540 are connected through the air extraction hole. Specifically, after the air pressure detection chamber is fully inflated and pressurized, The air pump can then be started, and the air is evacuated from the inside of the support rod sleeve 700 through the air evacuation pipe 600 and the air evacuation hole, bringing the inner cavity of the support rod sleeve 700 to a negative pressure state. If there is a slight defect at the weld that connects the inner cavity of the support rod sleeve 700 to the external air pressure detection chamber, the high-pressure gas in the air pressure detection chamber will flow into the inner cavity of the sleeve along these defects, causing the air pressure in the air pressure detection chamber to drop rapidly. In this way, it is possible to detect slight connection defects that are difficult to detect with traditional external air pressure detection, further improving the accuracy of the detection.

[0051] The bottom of the inner wall of the extension cylinder 530 is radially provided with a guide groove that communicates with the air extraction hole. This allows the gas between the inner wall of the extension cylinder 530 and the outer wall of the support rod sleeve 700 to be quickly introduced into the air extraction hole for discharge, thereby improving the air extraction efficiency. At the same time, it prevents gas from remaining inside the extension cylinder 530 and ensures the negative pressure stability of the inner cavity of the support rod sleeve 700.

[0052] The support rod top sealing assembly 400 includes a frame 401 slidably mounted on the worktable 200. A support plate 402, sliding along the Z-axis, is provided inside the frame 401. A first hydraulic rod 403, used to drive the support plate 402 to slide along the Z-axis, is provided at the top of the frame 401. The output end of the first hydraulic rod 403 is connected to the support plate 402. A vertical rod is provided at the center of the lower surface of the support plate 402, and a sealing plate 405 is provided at the end of the vertical rod. The lower surface of the sealing plate 405 is provided with a sealing element that connects to the support rod. A sealing rubber head 406 is fitted to the top port of the sleeve 700; Y-axis slides 408 are provided on the bottom of both sides of the frame 401, and Y-axis guide rails 407 are provided on the surface of the worktable 200 to cooperate with the Y-axis slides 408. The frame 401 slides along the Y-axis direction through the cooperation of the Y-axis slides 408 and the Y-axis guide rails 407; a second hydraulic rod 409 is provided on the rear side of the surface of the worktable 200 to drive the frame 401 to slide along the Y-axis direction, and the output end of the second hydraulic rod 409 is connected to the back of the frame 401.

[0053] Specifically, after the detection core 521 completes the positioning and sealing of the lower end of the support rod sleeve 700, the second hydraulic rod 409 pushes the frame 401 forward along the Y-axis guide rail 407, allowing the sealing rubber head 406 to move to the corresponding position at the top of the support rod sleeve 700. Subsequently, the first hydraulic rod 403 drives the support plate 402 to slide downward along the Z-axis, causing the sealing rubber head 406 to press against the top opening of the support rod sleeve 700, completing the sealing of the top of the support rod sleeve 700. This prevents external air from entering the inner cavity of the support rod sleeve 700 from the top opening during the air extraction process, ensuring a stable negative pressure state in the inner cavity of the support rod sleeve 700 and avoiding the impact of external air infiltration on the accuracy of defect judgment. After the inspection is completed, the first hydraulic rod 403 drives the support plate 402 and the sealing rubber head 406 to move upward and reset, and the second hydraulic rod 409 pulls the frame 401 backward, allowing the inspected support rod sleeve 700 to be removed.

[0054] The support plate 402 has guide rods 404 penetrating the frame 401 at each of its four corners. A guide sleeve is provided at the top of the frame 401 corresponding to the guide rods 404. The guide rods 404 move along the Z-axis through the guide sleeves. Specifically, when the first hydraulic rod 403 drives the support plate 402 to rise and fall along the Z-axis, the guide rods 404 can slide synchronously along the guide sleeves, which limits and guides the sliding direction of the support plate 402, preventing the support plate 402 from deflecting during movement. This ensures that the sealing rubber head 406 can be accurately aligned with the top opening of the support rod sleeve 700, guaranteeing the sealing performance and positional accuracy of the seal.

[0055] The workbench 200 features a top frame 300 at its edge. The top frame 300 has cutouts on its front corresponding to the positions of the top sealing component 400 and the support rod positioning component 500 on the support rod. Specifically, the top frame 300 can neatly organize and shield the electrical and pneumatic piping of the equipment, preventing external debris from falling into the equipment's movement gaps and affecting its operation. It also improves the overall cleanliness and aesthetics of the equipment, facilitating daily cleaning and maintenance by operators. Simultaneously, workers can inspect the welds of the support rod sleeve 700 through the cutouts.

[0056] Working principle: Before testing, the sleeve 700 of the car suspension support rod to be tested is inserted into the testing core 520 of each support rod positioning assembly 500 in sequence to ensure that the weld to be tested is between the first annular sealing ring 524 and the second annular sealing ring 526, thereby completing the workpiece loading.

[0057] Subsequently, an external air pump fills the first annular air chamber 523 and the second annular air chamber 525 with compressed gas. Under the action of air pressure, the two annular sealing rings expand and fit tightly against the outer wall of the support rod sleeve 700, completing the sealing of the upper and lower sides of the weld and forming a closed air pressure detection chamber.

[0058] Next, the top sealing assembly 400 of the support rod begins to operate. The second hydraulic rod 409 pushes the frame 401 forward along the Y-axis, so that the sealing rubber head 406 is aligned with the top opening of the corresponding support rod sleeve 700. The first hydraulic rod 403 drives the support plate 402 to move downward, causing the sealing rubber head 406 to press and seal the top opening of the support rod sleeve 700.

[0059] After sealing is completed, high-pressure gas at a set pressure is injected into the pressure detection chamber through the first inflation port 522. After the inflation valve is closed, pressure is maintained. At the same time, the external vacuum pump is started, and the vacuum pipe 600, the bellows pipe 540 and the extension tube 530 are used to perform a vacuum operation on the inner cavity of the support rod sleeve 700, so that the inner cavity of the support rod sleeve 700 is maintained in a negative pressure state.

[0060] During the pressure holding process, the air pressure sensor monitors the air pressure changes inside the air pressure detection chamber in real time. If the air pressure is stable within the set range, it indicates that the weld sealing is qualified; if the air pressure drops significantly, it indicates that there is an air leakage defect in the weld, and the equipment can directly output the test results.

[0061] After a single batch of tests is completed, the first annular inflation chamber 523 and the second annular inflation chamber 525 are vented to release the tension of the annular sealing ring on the support rod sleeve 700. Then, the first hydraulic rod 403 drives the sealing rubber head 406 to move upward, and the second hydraulic rod 409 pulls the frame 401 to move backward. The operator can then remove the tested support rod sleeve 700, completing the test and preparing for the next batch of workpieces.

[0062] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. An automotive suspension support rod testing device for testing the sealing performance of the weld seam of an automotive suspension support rod sleeve, comprising a base (100) and a worktable (200) disposed on top of the base (100), characterized in that, The workbench (200) has a plurality of support rod positioning assemblies (500) along the X-axis direction. The workbench (200) has a support rod top sealing assembly (400) that moves along the Y-axis direction at the position of each support rod positioning assembly (500). The support rod top sealing assembly (400) is used to seal the top of the support rod sleeve (700). The support rod positioning assembly (500) includes a positioning plate (510) mounted on the worktable (200). A detection core (520) is installed at the center of the positioning plate (510). A detection cavity (521) and a through hole (527) are formed at the center of the detection core (520) from top to bottom. The support rod sleeve (700) is inserted into the detection cavity (521) and the through hole (527) from top to bottom. The inner wall of the detection cavity (521) is provided with a first annular groove, a first annular sealing ring (524) is provided in the first annular groove, and a first annular inflation cavity (523) is provided in the inner wall of the first annular groove. The inner wall of the through hole (527) is provided with a second annular groove, the second annular groove is provided with a second annular sealing ring (526), ​​and the inner wall of the second annular groove is provided with a second annular inflation cavity (525). After the support rod sleeve (700) is inserted into the detection cavity (521) and the through hole (527), the weld on the surface of the support rod sleeve (700) is located between the first annular sealing ring (524) and the second annular sealing ring (526). The first annular sealing ring (524), the second annular sealing ring (526) and the outer wall of the support rod sleeve (700) enclose a pressure detection cavity. A first inflation port (522) communicating with the pressure detection cavity is opened on one side of the support rod sleeve (700). The first inflation port (522) is connected to an external inflation pump through a pipe. The air tightness of the weld of the support rod sleeve (700) is judged according to the change of the internal pressure of the pressure detection cavity.

2. The automotive suspension support rod testing equipment according to claim 1, characterized in that: The air pressure detection chamber is equipped with an air pressure sensor, which is used to detect changes in air pressure inside the air pressure detection chamber.

3. The automotive suspension support rod testing equipment according to claim 1, characterized in that: Both the first annular inflation chamber (523) and the second annular inflation chamber (525) are connected to an external inflation pump via pipes; After air is injected into the first annular air chamber (523), the first annular sealing ring (524) is compressed inward under the action of air pressure to hug the surface of the support rod sleeve (700) and play a sealing role. After air is injected into the second annular air chamber (525), the second annular sealing ring (526) is compressed inward under the action of air pressure to hug the surface of the support rod sleeve (700) and play a sealing role.

4. The automotive suspension support rod testing equipment according to claim 1, characterized in that: The bottom of the detection core (520) is provided with an extension cylinder (530) that communicates with the through hole (527), and the end of the support rod sleeve (700) extends into the extension cylinder (530) through the detection cavity (521) and the through hole (527).

5. The automotive suspension support rod testing equipment according to claim 4, characterized in that: The bottom of the extension tube (530) is provided with a corrugated pipe (540), and the end of the corrugated pipe (540) is provided with an air extraction pipe (600), the end of which is connected to an external air extraction pump.

6. The automotive suspension support rod testing equipment according to claim 5, characterized in that: An air extraction hole is provided at the center of the bottom of the extension cylinder (530), and the extension cylinder (530) and the corrugated pipe (540) are connected through the air extraction hole.

7. The automotive suspension support rod testing equipment according to claim 6, characterized in that: The bottom of the inner wall of the extension cylinder (530) is provided with a radially arranged air guide groove that communicates with the air extraction hole.

8. The automotive suspension support rod testing equipment according to claim 1, characterized in that: The top sealing assembly (400) of the support rod includes a frame (401) slidably mounted on the workbench (200). The inner side of the frame (401) is provided with a support plate (402) that slides along the Z-axis. The top of the frame (401) is provided with a first hydraulic rod (403) for driving the support plate (402) to slide along the Z-axis. The output end of the first hydraulic rod (403) is connected to the support plate (402). A vertical rod is provided at the center of the lower surface of the support plate (402). A sealing plate (405) is provided at the end of the vertical rod. A sealing rubber head (406) that cooperates with the top port of the support rod sleeve (700) is provided on the lower surface of the sealing plate (405). The bottom of both sides of the frame (401) is provided with Y-axis slides (408), and the surface of the worktable (200) is provided with Y-axis guide rails (407) that cooperate with the Y-axis slides (408). The frame (401) slides along the Y-axis direction through the cooperation of the Y-axis slides (408) and the Y-axis guide rails (407). The rear side of the surface of the worktable (200) is provided with a second hydraulic rod (409) that drives the frame (401) to slide along the Y-axis direction, and the output end of the second hydraulic rod (409) is connected to the back of the frame (401).

9. The automotive suspension support rod testing equipment according to claim 8, characterized in that: The support plate (402) has guide rods (404) that pass through the frame (401) at each of the four corners of its surface. The top of the frame (401) is provided with a guide sleeve corresponding to the position of the guide rod (404). The guide rod (404) moves along the Z-axis through the guide sleeve.

10. The automotive suspension support rod testing equipment according to any one of claims 1-9, characterized in that: The workbench (200) has a top frame (300) at its edge, and the top frame (300) has a cutout on its front corresponding to the positions of the top sealing assembly (400) and the positioning assembly (500) of the support rod.

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