An electric control air suspension system air spring gas chamber helium leak detection device

Abstract

The present application relates to structural component sealing detection, more particularly to the technical field of vacuum detection, and discloses a kind of helium leak detection device for air spring gas chamber of electric control air suspension system, including helium detection machine, detection area is provided on the helium detection machine, back machine box and side machine box are provided in the detection area, installation component is installed in the detection area, loading part, control part, detection component and anti-skid component are connected on the installation component, through the linkage of double-shaft motor, carousel, dial, drive pin and groove wheel structure, the pure mechanical synchronous control of air spring gas chamber autorotation movement and helium spray gun feeding movement is realized, without adding position sensor and corresponding electric control acquisition component, solve the problem of artificial operation difference caused by existing helium spray leak detection station relying on manual spray gun scanning, realize that helium spray gun follows workpiece rotation and completes automatic step scanning, different from existing semi-automatic leak detection scheme, reduce the interference caused by human factor to leak detection operation process.

Description

Technical Field

[0001] This invention relates to the testing of the sealing performance of structural components, and more specifically to the field of vacuum testing technology, specifically a helium leak detection device for the air spring chamber of an electronically controlled air suspension system. Background Technology

[0002] As a crucial elastic component in vehicle suspension systems, the air spring's air chamber sealing performance directly determines the overall reliability of the air spring. Even minor leaks in the air chamber welds, threaded connections, and component bonding interfaces can cause internal air pressure decay during operation, leading to a decline in suspension performance. Therefore, after the air spring chambers are manufactured, leak detection must be performed to identify defective components. Currently, helium mass spectrometry leak detection is the mainstream method for detecting micro-leakage in such components. In mass production, leak location detection is a prerequisite for rework; only by determining the specific location of the leak can defective components be repaired by welding or bonding.

[0003] In current leak detection operations for air spring chambers, vacuum helium spraying is widely used. This process involves creating a negative pressure environment inside the workpiece, and the operator uses a helium spray gun to sequentially spray tracer helium onto various areas of the workpiece's outer surface. A helium mass spectrometer leak detector determines whether a leak exists at the corresponding location based on changes in the detected helium signal. Some semi-automated workstations use fixtures to rotate the air spring chamber. After the workpiece rotates, the spray gun is still manually moved to scan different height areas. The entire detection process relies on manual adjustment of the spray gun position. After the workpiece is clamped and fixed, a vacuum pump is connected to the workpiece's inner cavity through a vacuum pipeline to establish a negative pressure. The gas supply circuit delivers helium to the spray gun to complete the tracer gas injection, thus identifying micro-leaks in the air spring chamber and locating the leak point, thereby meeting the detection needs of the production rework process.

[0004] In actual production, the movement of the spray gun relies entirely on manual operation. The operator's skill level and mental state during operation will affect the scanning process. The scanning trajectory and movement speed of different operators are different, which can easily lead to insufficient scanning of the workpiece surface and make it difficult to ensure the consistency of the scanning process for each workpiece. Some semi-automated stations use simple lead screw mechanisms to realize the lifting and feeding of the spray gun, which lacks corresponding motion constraint structures. The spray gun is prone to posture deviation during feeding, and the direction of tracer helium injection changes, which will interfere with the judgment results of leakage signals, reduce the stability of leak detection operations, and is not conducive to the development of air spring chamber detection work. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a helium leak detection device for the air spring chamber of an electronically controlled air suspension system. This device solves the problems of poor scanning consistency caused by manual hand-held spray guns in existing vacuum jet leak detection operations, easy attitude deviation of the spray gun feed, unexpected displacement of the spray gun caused by equipment vibration, and easy torsion failure of the vacuum pipeline when the workpiece rotates.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a helium leak detection device for the air spring chamber of an electronically controlled air suspension system, comprising a helium detector, wherein a detection area is provided on the helium detector, a back housing and a side housing are provided in the detection area, and an installation assembly is installed in the detection area. The installation assembly is connected to a feeding section, a control section, a detection component, and an anti-slip component. The feeding section is provided with the air spring chamber and includes a feeding tray. The control section includes a dual-axis motor and a rotating rod, and both output shafts of the dual-axis motor are connected to rotating shafts. One of the rotating shafts is fixedly connected to the feeding tray, and the other rotating shaft is fixedly connected to a turntable at its end. A dial is fixedly connected to the turntable, and a drive pin is eccentrically connected to the turntable. A grooved wheel is sleeved on the rotating rod, and a radial groove is formed on the grooved wheel to slide and adapt to the drive pin. A locking arc is formed on the dial to slide and adapt to the grooved wheel. The detection component includes a screw, one end of which is fixedly connected to the rotating rod. An L-shaped arm is threaded onto the screw, and a helium spray gun is installed on the end of the L-shaped arm away from the screw.

[0007] Preferably, the mounting assembly includes a U-shaped base, which is embedded in the bottom of the inner wall of the detection area. A base plate is fixedly connected between the inner walls of the U-shaped base, a support arm is fixedly connected to the base plate, and a frame is fixedly connected between the support arms. A positioning hole is centrally located on the U-shaped base, a positioning ring is fixedly connected to the inner wall of the positioning hole, a support plate is fixedly connected to the positioning ring, a positioning ring is fixedly connected to the support plate, a guide hole is provided on the U-shaped base, and an H-shaped frame is fixedly connected between the support arm and the inner wall of the U-shaped base.

[0008] Preferably, one end of the L-shaped arm is slidably connected to the inner wall of the guide hole, the end of the rotating rod away from the screw is rotatably connected to the base plate, and a through hole and a sliding hole are provided on one side of the inner wall of the U-shaped seat.

[0009] Preferably, the feeding part includes a feeding tray, which is rotatably connected to the inner wall of the first positioning ring. A threaded support is fixedly connected to the feeding tray. A constraint ring is fixedly connected to the inner wall of the second positioning ring. A ring groove is formed on the inner wall of the constraint ring. A rotating piece is provided inside the constraint ring. A ring edge is fixedly sleeved on the outer wall of the rotating piece. The ring edge is rotatably connected to the inner wall of the ring groove.

[0010] Preferably, the rotating plate has a threaded groove, the inner wall of the threaded groove is threaded with a threaded tube, the upper end of the threaded tube is equipped with a rotary joint, and a vacuum tube is connected to the rotary joint.

[0011] Preferably, a vacuum pump is installed in the back enclosure, and the vacuum tube is connected to the pump port of the vacuum pump. An air pump and a helium tank are installed in the side enclosure, and the helium spray gun is connected to the helium tank through the air pump.

[0012] Preferably, the bottom of the air spring chamber is threadedly connected to a threaded support, the top of the air spring chamber is threadedly connected to the end of the threaded tube away from the rotary joint and sealed, and the nozzle of the helium spray gun is horizontally facing one side of the air spring chamber and is perpendicular to the air spring chamber.

[0013] Preferably, the screw moves through the H-shaped frame and is rotatably connected to the H-shaped frame, a limiting rod is fixedly connected between the H-shaped frames, and the end of the L-shaped arm away from the helium spray gun is slidably sleeved on the limiting rod.

[0014] Preferably, the anti-slip component includes a slide rod, which is slidably connected to the inner wall of the slide hole. One end of the slide rod is fixedly connected to an anti-slip plate, and a spring is elastically connected between the anti-slip plate and the inner wall of the U-shaped seat.

[0015] Preferably, the anti-slip plate has an arc-shaped structure and abuts against the outer wall of the rotating rod through the arc surface, the grooved wheel extends into the through hole, and the dual-axis motor is installed between the inner walls of the frame.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a helium leak detection device for the air spring chamber of an electronically controlled air suspension system, which has the following advantages: 1. By linking the dual-axis motor, turntable, dial, drive pin and grooved wheel structure, the pure mechanical synchronous control of the rotation of the air spring chamber and the feeding motion of the helium spray gun is realized. There is no need to add position sensors and corresponding electronic control acquisition components. It solves the problem of human operation difference caused by the reliance on manual hand-held spray gun scanning in the existing helium spray leak detection station. It realizes that the helium spray gun follows the workpiece to complete the automatic step scanning. It is different from the existing semi-automatic leak detection scheme and reduces the interference of human factors on the leak detection process.

[0017] 2. Through the cooperation of the screw, L-shaped arm, limit rod and guide hole structure, the intermittent rotational motion output by the groove wheel is converted into the vertical linear feed motion of the helium spray gun. The rotational freedom of the L-shaped arm is constrained, which solves the problem of deflection and swaying that easily occurs during the feed of the spray gun. It ensures that the spray posture of the helium spray gun relative to the air spring chamber remains stable. Unlike the simple screw feed mechanism, it maintains the consistency of the tracer helium spray position.

[0018] 3. By combining the anti-slip assembly consisting of a slide bar, anti-slip plate, and spring with the rotating rod structure, frictional damping is applied to the rotating rod during the locking stage of the Geneva wheel. This suppresses the unexpected rotation of the transmission chain caused by equipment vibration, solves the problem of non-autonomous displacement of the helium spray gun under vibration conditions, and avoids missed or repeated scanning of the workpiece surface. This is different from the undamped Geneva wheel transmission structure and improves the reliability of the intermittent transmission mechanism.

[0019] 4. Through the cooperation of the feeding tray, constraint ring, rotating plate, ring edge and rotary joint structure, the rotating parts are isolated from the fixed vacuum tube during the rotation operation of the air spring chamber. This solves the problem that the vacuum pipeline is prone to torsion and sealing failure when the workpiece is rotating. It maintains a stable negative pressure environment inside the air spring chamber. This is different from the assembly form of directly connecting the rotating workpiece with a rigid tube, and ensures the normal execution of the vacuum jet leak detection process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram showing the assembly of the mounting components, the feeding section, and the air spring chamber of the present invention. Figure 3 This is a schematic diagram of the structure of the mounting component of the present invention; Figure 4 This is an exploded view of the feeding section of the present invention; Figure 5 This is a schematic diagram of the detection component of the present invention; Figure 6 This is a schematic diagram of the control unit of the present invention; Figure 7 This is a schematic diagram of the anti-slip component of the present invention.

[0021] In the diagram: 1. Helium detector; 2. Detection area; 3. Back panel; 4. Side panel; 5. Mounting components; 51. U-shaped base; 52. Base plate; 53. Support arm; 54. Frame; 55. Positioning ring one; 56. Support plate; 57. Positioning ring two; 58. Guide hole; 59. H-frame; 6. Loading section; 61. Loading tray; 62. Threaded support; 63. Constraint ring; 64. Ring groove; 65. Rotating plate; 66. Ring edge; 67. Thread 68. Tube; 69. Rotary joint; 7. Vacuum tube; 80. Air spring chamber; 81. Control unit; 82. Dual-axis motor; 83. Rotary shaft; 84. Turntable; 85. Dial; 86. Drive pin; 87. Rotating rod; 88. Grooved wheel; 99. Radial groove; 90. Detection assembly; 91. Screw; 92. Limiting rod; 93. L-shaped arm; 94. Helium spray gun; 10. Anti-slip assembly; 101. Slide rod; 102. Anti-slip plate; 103. Spring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0023] Please see Figure 1 - Figure 7 This invention provides a helium leak detection device for the air spring chamber of an electronically controlled air suspension system, including a helium detector 1, a base carrier for the entire device providing protection and installation foundation for all functional modules, and an integrated space for leak detection-related hardware. The helium detector 1 is provided with a detection area 2, which defines an independent working space for workpiece leak detection operations. The workpiece, rotating fixture, and spray gun mechanism are arranged in this area. The detection area 2 is provided with a back housing 3 and a side housing 4. The detection area 2 is installed with an installation component 5 to ensure the relative positional accuracy between the mechanisms and to constrain the installation reference of the kinematic pairs of each component. The installation component 5 is connected to a feeding part 6, a control part 8, a detection component 9, and an anti-slip component 10. The feeding part 6 is provided with an air spring chamber 7.

[0024] In this invention, the feeding unit 6 includes a feeding tray 61, and the control unit 8 outputs rotational power to drive the air spring chamber 7 to rotate on one hand, and to output intermittent rotation angle through the Geneva mechanism on the other hand, converting the continuous rotation of the workpiece into intermittent vertical feed drive, realizing the mechanical logic that the spray gun moves once for every revolution of the workpiece. It includes a dual-axis motor 81 and a rotating rod 86. Both output shafts of the dual-axis motor 81 are connected to rotating shafts 82. One rotating shaft 82 is fixedly connected to the feeding tray 61, and the end of the other rotating shaft 82 is fixedly connected to a turntable 83. A dial 84 is fixedly connected to the turntable 83. The upper part 3 is eccentrically connected with a drive pin 85. A grooved wheel 87 is sleeved on the rotating rod 86. A radial groove 88 is opened on the grooved wheel 87 to slide and adapt to the drive pin 85. A locking arc is opened on the dial 84 to slide and adapt to the grooved wheel 87. The detection component 9 is equipped with a helium spray gun. It receives the intermittent rotation output by the control unit and converts it into a vertical step displacement of the spray gun to complete the scanning and spraying of tracer helium along the outer wall of the air spring chamber. It includes a screw 91. One end of the screw 91 is fixedly connected to the rotating rod 86. An L-shaped arm 93 is threadedly connected to the screw 91. A helium spray gun 94 is installed on the end of the L-shaped arm 93 away from the screw 91.

[0025] In use, the rotating shaft 82 on one side of the dual-axis motor 81 drives the feeding plate 61 to rotate continuously, causing the air spring chamber 7 to rotate circumferentially. The rotating shaft 82 on the other side of the dual-axis motor 81 drives the turntable 83, the dial 84, and the drive pin 85 to rotate synchronously and continuously. Every time the air spring chamber 7 completes one rotation, the drive pin 85 enters the radial groove 88 of the grooved wheel 87, driving the grooved wheel 87 to rotate through a set angle. The grooved wheel 87 drives the rotating rod 86 and the screw 91 to rotate synchronously. The screw 91 drives the threaded L-shaped arm 93 to move axially along the limit rod 92, realizing the downward feeding of the helium spray gun 94 to a fixed distance. When the air spring chamber 7 rotates less than one revolution, the drive pin 85 does not engage the radial groove 88, the grooved wheel 87 remains locked and stationary, and the screw 91, the L-shaped arm 93, and the helium spray gun 94 do not produce displacement.

[0026] Furthermore, the mounting assembly 5 includes a U-shaped seat 51, which is embedded in the bottom of the inner wall of the detection area 2. A base plate 52 is fixedly connected between the inner walls of the U-shaped seat 51. A support arm 53 is fixedly connected to the base plate 52. A frame 54 is fixedly connected between the support arms 53. A positioning hole is centrally opened on the U-shaped seat 51. A positioning ring 55 is fixedly connected to the inner wall of the positioning hole. A support plate 56 is fixedly connected to the positioning ring 55. A positioning ring 57 is fixedly connected to the support plate 56. A guide hole 58 is opened on the U-shaped seat 51. An H-shaped frame 59 is fixedly connected between the support arm 53 and the inner wall of the U-shaped seat 51. One end of the L-shaped arm 93 is slidably connected to the inner wall of the guide hole 58. The end of the rotating rod 86 away from the screw 91 is rotatably connected to the base plate 52. A through hole and a sliding hole are opened on one side of the inner wall of the U-shaped seat 51.

[0027] In use, the U-shaped base 51, base plate 52, support arm 53, frame 54, and H-shaped frame 59 constitute the overall mounting base. Positioning ring 1 55 provides rotational support for the loading tray 61, positioning ring 2 57 provides the installation reference for the constraint ring 63, and guide hole 58 and limit rod 92 together constrain L-shaped arm 93, restricting L-shaped arm 93 from rotating with screw 91 and allowing it to only make vertical linear displacement. The two ends of rotating rod 86 are respectively provided with rotational support by H-shaped frame 59 and base plate 52. Through hole is used for mounting groove wheel 87, and sliding hole is used for reciprocating sliding of sliding rod 101 of anti-slip component 10.

[0028] In this embodiment, the feeding part 6 includes a feeding tray 61, which is rotatably connected to the inner wall of the positioning ring 55. A threaded support 62 is fixedly connected to the feeding tray 61. A constraint ring 63 is fixedly connected to the inner wall of the positioning ring 57. An annular groove 64 is formed on the inner wall of the constraint ring 63. A rotating plate 65 is provided inside the constraint ring 63. An annular edge 66 is fixedly sleeved on the outer wall of the rotating plate 65. The annular edge 66 is rotatably connected to the inner wall of the annular groove 64. A threaded groove is formed on the rotating plate 65. A threaded tube 67 is threadedly connected to the inner wall of the threaded groove. A rotary joint 68 is installed at the upper end of the threaded tube 67. A vacuum tube 69 is connected to the rotary joint 68.

[0029] In use, the feeding tray 61 rotates freely inside the positioning ring 55, driving the air spring chamber 7 to rotate. The inner annular groove 64 of the constraint ring 63 axially limits the outer annular edge 66 of the rotating plate 65. The rotating plate 65 can rotate circumferentially synchronously with the air spring chamber 7. The rotary joint 68 isolates the rotational movement of the rotating plate 65 and forms a fixed pipeline with the vacuum tube 69. The vacuum tube 69 remains stationary and does not follow the rotational movement of the air spring chamber 7, ensuring the sealing of the vacuum pipeline connection.

[0030] It is worth noting that a vacuum pump is installed in the back housing 3 to provide vacuum extraction capability for the air spring chamber 7 to be inspected, thereby establishing negative pressure inside the workpiece and meeting the negative pressure conditions for helium testing by vacuum jetting. The vacuum tube 69 is connected to the pump port of the vacuum pump. The side housing 4 is equipped with an air pump and a helium tank to store and transport tracer helium, providing a helium source for leak detection for the spray gun. The helium spray gun 94 is connected to the helium tank through the air pump. The bottom of the air spring chamber 7 is threadedly connected to the threaded support 62. The top of the air spring chamber 7 is threadedly connected to the end of the threaded tube 67 away from the rotary joint 68 and sealed. The nozzle of the helium spray gun 94 is horizontally facing one side of the air spring chamber 7 and is perpendicular to the air spring chamber 7. The screw 91 moves through the H-shaped frame 59 and is rotatably connected to the H-shaped frame 59. The H-shaped frames 59 are fixedly connected to the limit rod 92. The end of the L-shaped arm 93 away from the helium spray gun 94 is slidably sleeved on the limit rod 92.

[0031] During use, the vacuum pump works continuously to maintain the negative pressure vacuum state inside the air spring chamber 7. The air pump inside the side housing 4 draws helium from the helium tank and delivers it to the helium spray gun 94. The helium spray gun 94 horizontally sprays tracer helium towards the outer wall of the rotating air spring chamber 7. When there is a leakage defect in the air spring chamber 7, the externally sprayed helium passes through the leak hole and enters the air spring chamber 7. It then enters the leak detector through the vacuum pipeline to realize the leak rate detection. The screw 91 rotates on the H-shaped frame 59. The limiting rod 92 constrains the rotational degree of freedom of the L-shaped arm 93, converting the rotational motion of the screw 91 into the vertical linear motion of the L-shaped arm 93.

[0032] It is worth noting that the anti-slip component 10 applies frictional damping to suppress the unexpected rotation of the transmission chain caused by equipment vibration, avoid mis-displacement of the spray gun, and ensure the reliability of intermittent transmission positioning. It includes a slide rod 101, which is slidably connected to the inner wall of the slide hole. One end of the slide rod 101 is fixedly connected to an anti-slip plate 102. A spring 103 is elastically connected between the anti-slip plate 102 and the inner wall of the U-shaped seat 51. The anti-slip plate 102 has an arc-shaped structure and abuts against the outer wall of the rotating rod 86 through the arc surface. The grooved wheel 87 extends into the through hole. The dual-axis motor 81 is installed between the inner walls of the frame 54.

[0033] In use, the spring 103 continuously applies elastic force to the slide rod 101, pushing the arc-shaped surface of the anti-slip plate 102 to press against the outer surface of the rotating rod 86. After the grooved wheel 87 completes a single rotation, it enters the locking stage. The anti-slip plate 102 applies a damping torque to the rotating rod 86 by means of contact friction, suppressing the abnormal rotation of the rotating rod 86 and the screw 91 caused by equipment vibration, and preventing the helium spray gun 94 from undergoing unexpected displacement. The slide rod 101 slides along the inner wall of the sliding hole with a small stroke to adapt to the radial dimension fluctuation during the rotation of the rotating rod 86. The dual-axis motor 81 is fixedly installed by the frame 54.

[0034] Working principle: When the helium leak detection device for the air spring chamber of the electronically controlled air suspension system is working, the lower end of the air spring chamber 7 to be tested is first threadedly fastened to the threaded support 62 of the feeding tray 61. The upper end of the air spring chamber 7 is threadedly sealed to the lower end of the threaded tube 67. The vacuum pump inside the back housing 3 is started, and a vacuum is drawn into the inner cavity of the air spring chamber 7 through the vacuum tube 69, the rotary joint 68, and the threaded tube 67, so that a negative pressure environment is formed inside the air spring chamber 7. The rotary joint 68 isolates the rotating vane 65 from the stationary vacuum tube 69. The ring edge 66 of the vane 65 rotates in the annular groove 64 of the constraint ring 63, thereby ensuring that the sealing of the vacuum pipeline is not damaged by the rotational movement during the rotation of the air spring chamber 7.

[0035] The air pump and helium tank inside the side housing 4 supply tracer helium to the helium spray gun 94. After the equipment starts, the dual-axis motor 81 synchronously drives the two rotating shafts 82. One rotating shaft 82 drives the loading plate 61 to rotate within the positioning ring 55, causing the clamped air spring chamber 7 to rotate circumferentially. The other rotating shaft 82 drives the turntable 83, the dial 84, and the drive pin 85 to rotate continuously in perfect synchronization with the air spring chamber 7. When the dual-axis motor 81 rotates forward to enter the leak detection scanning mode, the air spring chamber 7, the dial 84, and the drive pin 85 rotate synchronously and continuously in the forward direction. Before the dial 84 has completed a full revolution, the drive pin 85 has not entered the radial groove 88 of the grooved wheel 87. 7 remains stationary, and the rotating rod 86 and screw 91 remain stationary as well. The L-shaped arm 93 and the helium spray gun 94 do not produce vertical displacement. After the dial 84 completes one full positive rotation with the air spring chamber 7, the eccentrically arranged drive pin 85 slides into the radial groove 88 of the grooved wheel 87 and moves the grooved wheel 87 to rotate through a fixed set angle. The grooved wheel 87 drives the coaxially fixed rotating rod 86 to rotate through the corresponding angle simultaneously. The rotating rod 86 drives the screw 91 to rotate. The L-shaped arm 93 is constrained by the limiting rod 92 and the guide hole 58 to eliminate the rotational degree of freedom. The rotational motion of the screw 91 is converted into the vertical downward linear feed of the L-shaped arm 93, and the helium spray gun 94 moves downward a fixed distance accordingly.

[0036] Spring 103 pushes slide rod 101 to continuously press the arc surface of anti-slip plate 102 against the outer surface of rotating rod 86. During the locking stage of grooved wheel 87, anti-slip plate 102 provides friction damping torque to suppress equipment vibration and prevent unexpected rotation of rotating rod 86 and screw 91, thus avoiding misfeeding of helium spray gun 94. Helium spray gun 94 continuously sprays helium horizontally and vertically toward the outer wall of air spring chamber 7. After each rotation of the outer wall of air spring chamber 7 is completed, the spray gun moves downward a certain distance. As air spring chamber 7 rotates forward multiple times, helium spray gun 94 gradually moves down from the upper part of air spring chamber 7 to the bottom of workpiece, completing the scanning of the entire outer wall of workpiece. If there is a leakage hole in air spring chamber 7, the externally sprayed helium passes through the leakage hole and enters the interior of air spring chamber 7 under the action of pressure difference, and enters the helium detection host through the vacuum pipeline to identify the leakage signal.

[0037] When the dual-axis motor 81 rotates in the reverse direction to enter the mechanism reset state, the air spring chamber 7, dial 84, and drive pin 85 rotate synchronously and continuously in the opposite direction. Before the dial 84 completes a full rotation in the reverse direction, the drive pin 85 cannot enter the radial groove 88 of the grooved wheel 87. The grooved wheel 87, rotating rod 86, and screw 91 remain stationary, and the helium spray gun 94 will not rise. After the dial 84 completes a full rotation in the reverse direction with the air spring chamber 7, the drive pin 85 re-engages with the radial groove 88, and the drive grooved wheel 87 rotates in the opposite direction by a set angle. The grooved wheel 87 drives the rotating rod 86 and screw 91... When rod 91 rotates in the opposite direction, under the constraint of limit rod 92 and guide hole 58, L-shaped arm 93 drives helium spray gun 94 to advance upward a fixed distance, continuously keeping the motor in reverse. Each time a complete rotation is completed, the spray gun advances upward a certain distance, which can reset the helium spray gun 94 back to the initial position on the upper part of the workpiece. During the rotation, anti-slip component 10 still provides friction damping to prevent vibration from causing the mechanism to move. When the motor rotates less than a full rotation, drive pin 85 cannot complete the engagement drive, and the entire intermittent transmission chain remains locked and stationary, and the spray gun maintains its original height position unchanged.

[0038] After all tests are completed, turn off the vacuum pump and helium supply, disconnect the sealing threaded connection at both ends of the air spring chamber 7, remove the tested workpiece, and the motor can be reversed to reset the helium spray gun 94 to its initial height, waiting for the next workpiece to be clamped and tested.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system, comprising a helium detector (1), characterized in that: The helium detector (1) is provided with a detection area (2), and a back box (3) and a side box (4) are provided in the detection area (2). An installation assembly (5) is installed in the detection area (2). A feeding part (6), a control part (8), a detection assembly (9) and an anti-slip assembly (10) are connected to the installation assembly (5). An air spring chamber (7) is provided on the feeding part (6). The feeding unit (6) includes a feeding tray (61), and the control unit (8) includes a dual-axis motor (81) and a rotating rod (86). Both output shafts of the dual-axis motor (81) are connected to rotating shafts (82). One rotating shaft (82) is fixedly connected to the feeding tray (61), and the other rotating shaft (82) is fixedly connected to a turntable (83). A dial (84) is fixedly connected to the turntable (83), and a drive pin (85) is eccentrically connected to the turntable (83). The rotating rod... (86) is fitted with a grooved wheel (87), the grooved wheel (87) is provided with a radial groove (88) that is slidably adapted to the drive pin (85), the dial (84) is provided with a locking arc that is slidably adapted to the grooved wheel (87), the detection component (9) includes a screw (91), one end of the screw (91) is fixedly connected to the rotating rod (86), an L-shaped arm (93) is threadedly connected to the screw (91), and a helium spray gun (94) is installed on the end of the L-shaped arm (93) away from the screw (91).

2. The helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 1, characterized in that: The mounting assembly (5) includes a U-shaped seat (51), which is embedded in the bottom of the inner wall of the detection area (2). A base plate (52) is fixedly connected between the inner walls of the U-shaped seat (51). A support arm (53) is fixedly connected to the base plate (52). A frame (54) is fixedly connected between the support arms (53). A positioning hole is centrally provided on the U-shaped seat (51). A positioning ring (55) is fixedly connected to the inner wall of the positioning hole. A support plate (56) is fixedly connected to the positioning ring (55). A positioning ring (57) is fixedly connected to the support plate (56). A guide hole (58) is provided on the U-shaped seat (51). An H-shaped frame (59) is fixedly connected between the support arm (53) and the inner wall of the U-shaped seat (51).

3. The helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 2, characterized in that: One end of the L-shaped arm (93) is slidably connected to the inner wall of the guide hole (58), and the end of the rotating rod (86) away from the screw (91) is rotatably connected to the base plate (52). A through hole and a sliding hole are provided on one side of the inner wall of the U-shaped seat (51).

4. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 2, characterized in that: The feeding part (6) includes a feeding tray (61), which is rotatably connected to the inner wall of the first positioning ring (55). A threaded support (62) is fixedly connected to the feeding tray (61). A constraint ring (63) is fixedly connected to the inner wall of the second positioning ring (57). A ring groove (64) is opened on the inner wall of the constraint ring (63). A rotating piece (65) is provided inside the constraint ring (63). A ring edge (66) is fixedly sleeved on the outer wall of the rotating piece (65). The ring edge (66) is rotatably connected to the inner wall of the ring groove (64).

5. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 4, characterized in that: The rotating plate (65) has a threaded groove, and the inner wall of the threaded groove is threadedly connected to a threaded tube (67). A rotary joint (68) is installed at the upper end of the threaded tube (67), and a vacuum tube (69) is connected to the rotary joint (68).

6. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 5, characterized in that: A vacuum pump is installed inside the back casing (3), and the vacuum tube (69) is connected to the pump port of the vacuum pump. An air pump and a helium tank are installed inside the side casing (4), and the helium spray gun (94) is connected to the helium tank through the air pump.

7. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 5, characterized in that: The bottom of the air spring chamber (7) is threadedly connected to the threaded support (62), and the top of the air spring chamber (7) is threadedly connected to the end of the threaded tube (67) away from the rotary joint (68) and sealed. The nozzle of the helium spray gun (94) is horizontally facing one side of the air spring chamber (7) and is perpendicular to the air spring chamber (7).

8. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 2, characterized in that: The screw (91) moves through the H-shaped frame (59) and is rotatably connected to the H-shaped frame (59). A limiting rod (92) is fixedly connected between the H-shaped frames (59). The end of the L-shaped arm (93) away from the helium spray gun (94) is slidably sleeved on the limiting rod (92).

9. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 3, characterized in that: The anti-slip component (10) includes a slide rod (101), which is slidably connected to the inner wall of the slide hole. One end of the slide rod (101) is fixedly connected to an anti-slip plate (102), and a spring (103) is elastically connected between the anti-slip plate (102) and the inner wall of the U-shaped seat (51).

10. A helium leak detection device for the air spring chamber of an electronically controlled air suspension system according to claim 9, characterized in that: The anti-slip plate (102) is an arc-shaped structure that abuts against the outer wall of the rotating rod (86) through the arc surface. The grooved wheel (87) extends into the through hole. The dual-axis motor (81) is installed between the inner walls of the frame (54).

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