Air tightness detection equipment for automobile parts

Abstract

The invention relates to the technical field of tire air tightness detection, in particular to air tightness detection equipment for automobile parts. The invention provides air tightness detection equipment for automobile parts, which comprises a detection table, a turnover frame controlled to rotate is arranged on the detection table, a water tank is arranged on the turnover frame, a rotary disc controlled to rotate is arranged on the turnover frame, a connecting pipe is arranged on the water tank, and a marking liquid storage tank is mounted on the detection table. A connecting frame is arranged on the detection table, a spraying piece is installed on the connecting frame and communicated with a marking liquid storage box through a spraying pipe, a tire is arranged on the rotating disc, the spraying piece sprays marking liquid to the outer surface of the rotating tire, the marking liquid makes contact with seeping water and then has a color development reaction, differential color marks are formed at leakage points, and the leakage points are detected through the detection table. The method is advantaged in that defect positions are accurately positioned, subsequent maintenance or replacement is guided, gas leakage points are automatically detected and marked, manual leak detection is avoided, and detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire air tightness detection, and in particular to an air tightness detection device for automobile accessories. Background Art

[0002] A tire is an annular elastic component mounted on the vehicle rim, usually composed of rubber, a cord layer (such as nylon, steel wire, etc.) and a tread. Its core function is to contact the road surface, support the weight of the vehicle, cushion vibrations, provide traction and change the direction of travel.

[0003] During tire use, air molecules (especially oxygen) will slowly diffuse through the rubber carcass, causing the air pressure to naturally drop. If a sharp object pierces the tread and causes air leakage, the pressure may be released slowly or quickly, resulting in reduced tire air tightness, which in turn causes insufficient tire pressure and increases the risk of a blowout.

[0004] To ensure the safety and reliability of tires throughout their life cycle, air tightness tests are often performed to eliminate hidden dangers in advance. Conventionally, the water immersion bubble method is widely adopted. The inflated tire is immersed in water, and the bubbles are observed to determine the leakage point. However, the detection accuracy of this detection method is limited. The bubbles caused by tiny leaks may not be obvious or require long-term observation to detect. If there are multiple leakage points, it is difficult for manual marking and repair in time, which affects the accuracy of detection.

[0005] Based on the above situation, there is an urgent need for an airtightness testing device for automotive parts, which can automatically detect and mark leaking points through mechanical coordination, accurately locate the defect position, and enable operators to quickly identify the leaking area based on the marked points, and guide subsequent repairs or replacements, thereby achieving the effect of automatically detecting and marking leaking points, avoiding manual missed detection, and improving detection efficiency and accuracy. Summary of the Invention

[0006] According to the problems raised in the background technology, the present invention provides an airtightness detection device for automobile accessories to solve the problems. The present invention will be further explained below.

[0007] An air tightness testing device for automobile parts includes a testing platform, a controlled rotating flip frame is provided on the testing platform, a water tank is provided on the flip frame, a controlled rotating disk is provided on the flip frame, a connecting pipe is provided on the water tank, a marking liquid storage tank is installed on the testing platform, a connecting frame is provided on the testing platform, a spraying member is installed on the connecting frame, and the spraying member is connected to the marking liquid storage tank through a spraying pipe.

[0008] Preferably, a gear ring is provided on the rotating disk, a flip frame is provided on the testing platform, the flip frame is rotatably connected to the rotating disk, a stepper motor is installed on the flip frame, a rotating shaft is provided on the stepper motor, a gear three is provided on the rotating shaft, and an air pump is provided on the water tank to accelerate the flow of water into the tire cavity.

[0009] Preferably, a servo motor is provided on the detection platform, a gear 1 is provided on the servo motor, a gear 2 is provided on the flip frame, the gear 2 is meshed with the gear 1, and a limit plate is provided on the flip frame to realize the flipping of the flip frame.

[0010] Preferably, the flip frame is provided with two groups of guide rods, each of the guide rods is provided with a sliding member, a sealing cover plate is provided between the two sliding members, a slide groove is provided on the sealing cover plate, a sealing bottom plate is provided in the slide groove, and two groups of semi-arc guide rails are provided on the testing platform, a drag reduction wheel is provided on the sliding member, and the drag reduction wheel is slidably connected in the guide rail, and a compression spring is provided between the sliding member and the sealing cover plate to achieve the squeezing and clamping effect of the sealing cover plate on the tire during the flipping action.

[0011] Preferably, a sealing rubber pad is provided on the sealing cover plate, an air valve is installed through the sealing cover plate and the sealing bottom plate, an adsorption groove is provided on the rotating disk, and the sealing rubber pad forms an airtight fit with the adsorption groove on the rotating disk for deflating to facilitate liquid injection.

[0012] Preferably, two sets of sliding frames are slidably connected to the flip frame through supporting ears, and the sliding frames are each provided with two arc-shaped clamping members, and both clamping members are provided with rollers. A torsion spring is provided between the sliding frame and the clamping members to achieve clamping and squeezing of the tire.

[0013] Preferably, a telescopic member is provided on the sliding frame, a locking member is provided on the sliding member, the locking member is hinged to the telescopic end of the telescopic member, and a return spring is provided on the telescopic member to realize the movement of the clamping member.

[0014] Preferably, a base plate is provided on the sliding part, a limiting part is provided on the base plate, a locking spring is provided between the limiting part and the base plate, a pin hole is provided on the guide rod, and two symmetrically distributed wedge parts are provided on the detection platform, and the wedge parts are squeezed and matched with the limiting part to achieve locking of the sliding part.

[0015] Preferably, a cam is provided on the rotating shaft, a connecting rod is provided on the cam, an extrusion piece is provided on the connecting rod, a guide frame is provided on the limiting plate, and the extrusion piece is slidably connected to the guide frame to realize the movement of the extrusion piece.

[0016] Preferably, the servo motor and the stepper motor are both covered with a protective shell to protect the normal operation of the servo motor and the stepper motor.

[0017] Beneficial effects: Compared with the existing technology, this device drives the rotating disk to rotate by meshing the gear three with the ring gear, and then drives the tire to rotate. The spraying part evenly sprays the marking liquid onto the outer surface of the tire. The marking liquid reacts with the moisture seeping from the tire surface to form a color reaction, forming a differentiated color mark at the leakage point, accurately locating the defect position. The operator can quickly identify the leaking area based on the marked point and guide subsequent repair or replacement, avoiding omissions caused by manual identification and affecting the detection accuracy.

[0018] By turning over and accelerating the filling mode, the turning frame is driven to rotate, which drives the water tank 12, the rotating disk and the tire connected to the turning frame to turn over. Under the action of the air pump, the liquid is increased in the filling speed of the tire cavity, shortening the filling cycle and ensuring efficient and accurate quantitative filling effect.

[0019] Through the clamping assembly and the limit plate, the sealing cover plate cooperates with the rotating disk to achieve the clamping effect of the tire, ensuring the absolute stability of the tire during the flipping process;

[0020] The deflation component is used to discharge the residual gas in the tire cavity, making it easier for liquid to be poured in, thereby ensuring that the sealing cover plate and the rotating disk rigidly clamp the top and bottom of the tire in both directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : Schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 : A schematic structural diagram of the components of the present invention that drive the rotating disk to rotate;

[0023] Figure 3 : A schematic structural diagram of the components of the present invention for realizing the flip-accelerated perfusion mode;

[0024] Figure 4 : A schematic structural diagram of the components of the sealing cover plate of the present invention that apply extrusion force to the tire;

[0025] Figure 5 : A schematic structural diagram of the relevant components of the extrusion assembly of the present invention;

[0026] Figure 6 : A schematic structural diagram of the relevant components of the pushing assembly of the present invention;

[0027] Figure 7 : A schematic structural diagram of the components related to the locking of the sliding member according to the present invention;

[0028] In the figure: 1-testing table, 11-turning frame, 12-water tank, 13-air pump, 14-guide rail, 15-marking liquid storage tank, 16-connecting frame, 161-spray pipe, 17-spraying part, 18-servo motor, 19-gear 1, 110-gear 2, 111-sliding part, 112-drag reduction wheel, 113-sealing cover plate, 1131-sealing bottom plate, 114-compression spring, 115-air valve, 116-sealing rubber pad, 117-base Plate, 118-limiting plate, 119-guide rod, 2-stepping motor, 21-gear three, 22-gear ring, 23-rotating disk, 24-rotating shaft, 3-sliding frame, 31-telescopic member, 32-return spring, 33-locking member, 34-clamping member, 35-torsion spring, 36-roller, 37-support ear, 4-guide frame, 41-cam, 42-connecting rod, 43-extrusion member, 5-limiting member, 51-locking spring, 52-wedge member, 53-pin hole. DETAILED DESCRIPTION

[0029] Next, combine Figure 1-Figure 7 A specific embodiment of the present invention is described in detail.

[0030] refer to Figure 1 and Figure 2 , an air tightness testing device for automotive parts, including a testing platform 1, a controlled rotating flip frame 11 is provided on the testing platform 1, a water tank 12 is installed on the flip frame 11, a controlled rotating rotating disk 23 is provided on the flip frame 11, for carrying and driving the tire to be tested to rotate to ensure comprehensive testing, the water tank 12 is provided with a connecting pipe (not shown in the figure) that can communicate with the inner cavity of the tire to be tested (hereinafter referred to as: tire), a marking liquid storage tank 15 is installed on the testing platform 1, and the marking liquid storage tank 15 is prepared with a water-discoloring marking liquid (such as containing cobalt chloride, leuco dye, etc.) for visually marking leakage points, a connecting frame 16 is fixed to the testing platform 1, and a spray piece is installed on the connecting frame 16 17. The spraying member 17 is connected to the marking liquid storage tank 15 through the spraying pipe 161, and is intended to evenly spray the marking liquid onto the outer surface of the tire. The tire is placed on the rotating disk 23, and the liquid in the water tank 12 is injected into the inner cavity of the tire to be tested through the connecting pipe. If the tire has an airtightness defect (such as a crack or a hole), the internal liquid will seep out from the leakage point to the outer surface. The spraying member 17 sprays the marking liquid onto the outer surface of the rotating tire. After the marking liquid comes into contact with the seeping water, a color reaction occurs, forming a differentiated color mark at the leakage point, accurately locating the defect position. The operator can quickly identify the leaking area based on the marked point and guide subsequent repair or replacement, thereby achieving the effect of automatically detecting and marking the leak point, avoiding manual missed detection, and improving detection efficiency and accuracy.

[0031] refer to Figure 1 and Figure 2In order to achieve comprehensive inspection of the tire, the tire is driven to rotate by the rotating disk 23, and the marking liquid spraying system is combined to ensure that the marking liquid evenly covers the tire surface, so that the leakage point can be accurately displayed. Therefore, the device is designed as follows: the outer wall of the rotating disk 23 is fixedly connected with a ring gear 22, and the inspection platform 1 is provided with a controlled rotation turning frame 11, and the turning frame 11 is rotatably connected to the rotating disk 23. A stepper motor 2 is installed on the turning frame 11, and a rotating shaft 24 is keyed to the output shaft of the stepper motor 2. A gear three 21 that can mesh with the ring gear 22 is fixed to the rotating shaft 24. The stepper motor 2 serves as a rotation power source, and the rotation output of the rotating disk 23 is realized through the cooperation of the rotating shaft 24, the ring gear 22 and the gear three 21, thereby driving the tire to rotate.

[0032] The stepper motor 2 starts, the rotating shaft 24 rotates, the gear three 21 rotates under control, the gear three 21 meshes with the ring gear 22, the ring gear 22 rotates, and then drives the rotating disk 23 to rotate. The tire rotates, and the spray part 17 evenly sprays the marking liquid onto the outer surface of the tire. After the marking liquid comes into contact with the moisture seeping from the tire surface, a color reaction occurs, forming a differentiated color mark at the leakage point, accurately locating the defect position.

[0033] refer to Figure 2 Before the color reaction, the tire cavity needs to be filled with reaction liquid. For this purpose, an air pump 13 is configured at the bottom of the water tank 12 as a driving mechanism. By turning on the air pump 13, air is filled into the water tank 12. The squeezing force of the air produces a downward squeezing force on the liquid in the water tank 12, forcing the liquid to flow into the tire cavity through the connecting pipe, thereby achieving a quantitative infusion effect.

[0034] refer to Figure 3 and Figure 7 To optimize liquid perfusion efficiency, this device features a flip-accelerated perfusion mode. Specifically, a servo motor 18 is mounted on the side of the test platform 1 as a drive source. Gear 1 19 is keyed to the output shaft of the servo motor 18, transmitting power between the two. Gear 2 110 is keyed to one end of the flip frame 11, meshing with Gear 19.

[0035] Through the output of the servo motor 18, gear 2 110 cooperates with gear 1 19 to drive the turning frame 11 to rotate around its axis, thereby driving the water tank 12, rotating disk 23 and tire connected to the turning frame 11 to turn synchronously. When the turning angle reaches 180 degrees, the water tank 12 is located on the top of the tire. At this time, the air pump 13 is started, and the air pump 13 injects air into the water tank 12. The air pressure pushes the water flow downward, and as the air flow is injected, the tire is filled with liquid.

[0036] During the flipping and pouring process, in order to ensure the stable positioning of the tire on the rotating disk 23 and prevent the tire from slipping or falling off due to the flipping action, this device is implemented through the following design. The specific structure and working principle are as follows.

[0037] refer to Figure 6 A limiting plate 118 is fixed to one side of the turning frame 11, and the end of the limiting plate 118 contacts and extends to the rear side of the tire. The contact surface between the limiting plate 118 and the rear side of the tire is a friction surface, that is, the rear side of the tire is limited and blocked and the friction force is increased. This structure limits the turning frame 11 to rotate in the clockwise direction for the first time.

[0038] When the turning frame 11 turns clockwise under the drive of the servo motor 18, the tire tends to deviate to the rear side due to the centrifugal force. At this time, the limiting plate 118 blocks the rear side of the tire to prevent the tire from lateral displacement or sliding.

[0039] refer to Figure 4 However, relying solely on the limiting effect of the limit plate 118 on the tire cannot ensure the absolute stability of the tire during the flipping process. Therefore, the present device is provided with a clamping assembly to achieve full circumferential fixation of the tire through mechanical constraints. The specific structure and working principle are as follows: two groups of symmetrically distributed guide rods 119 are fixedly connected to the flip frame 11, and sliding members 111 are slidably connected to the guide rods 119. A sealing cover plate 113 is slidably connected between the two sliding members 111. A sliding groove is provided at the bottom of the sealing cover plate 113, and a sealing bottom plate 1131 is connected to the sliding groove. By controlling the sealing cover plate 113 to move downward, the sealing bottom plate 1131 is driven downward and cooperates with the rotating disk 23 to clamp the top and bottom parts of the tire.

[0040] refer to Figure 1 and Figure 3 Under normal circumstances, an independent power source can be added to drive the sealing cover plate 113 to move downward. However, based on cost considerations, this device drives the sealing cover plate 113 to move downward through a flipping action, and there is no need for an additional independent power source. The mechanical linkage principle and implementation method are as follows: two sets of symmetrically distributed semi-arc guide rails 14 are installed on the test platform 1 to form a progressive downward pressure trajectory. The ends of the sliding members 111 are both connected with drag reduction wheels 112, and the drag reduction wheels 112 are slidably connected in the guide rails 14 to reduce the friction between the guide rails 14 and the sliding members 111.

[0041] As the flipping frame 11 flips, the guide rod 119 and the sliding member 111 rotate synchronously, and the sliding member 111 flips along the trajectory of the guide rail 14. Based on the arc design of the guide rail 14, the sliding member 111 flips and generates a downward movement, thereby linking the sealing cover plate 113 to move downward and press it onto the tire. The sealing cover plate 113 cooperates with the rotating disk 23 to achieve a tire clamping effect.

[0042] refer to Figure 4 In order to ensure the high efficiency and reliability of liquid perfusion in the tire cavity, this device is designed with a deflation component for quickly discharging residual gas in the tire cavity before perfusion, so as to avoid perfusion delay or liquid flow interruption caused by air resistance effect. The structural design and working process of the component are as follows: a sealing rubber pad 116 is provided at the bottom of the sealing cover plate 113, and an air valve 115 is installed through the center of the sealing cover plate 113 and the sealing bottom plate 1131. An adsorption groove (not shown in the figure) is provided on the rotating disk 23, which is intended to discharge residual gas from the air valve 115 through the pressure of the sealing cover plate 113 on the tire. The sealing rubber pad 116 forms an airtight fit with the adsorption groove on the rotating disk 23, which, on the one hand, realizes the discharge of residual gas and facilitates liquid perfusion, and on the other hand, realizes the bidirectional rigid clamping effect of the sealing cover plate 113 and the rotating disk 23 on the top and bottom of the tire.

[0043] A compression spring 114 is compressed between the sliding member 111 and the sealing cover plate 113 , so as to realize the resetting action of the sealing cover plate 113 through the compression spring 114 .

[0044] The tire is placed on the rotating disk 23, the servo motor 18 is started, and the gear 2 110 cooperates with the gear 1 19 to drive the turning frame 11 to rotate clockwise around its axis, driving the water tank 12 connected to the turning frame 11, the rotating disk 23 and the tire to turn synchronously. When the turning angle reaches 180 degrees, the water tank 12 is located on the top of the tire.

[0045] As the flipping frame 11 flips, the guide rod 119 and the sliding member 111 rotate synchronously, and the sliding member 111 flips along the trajectory of the guide rail 14. Based on the semi-arc design of the guide rail 14, the sliding member 111 flips and moves downward, thereby linking the sealing cover plate 113 to move downward and press it onto the tire. Based on the presence of the air valve 115, the tire is clamped by the sealing cover plate 113 and the rotating disk 23, and part of the gas in the tire cavity is discharged from the air valve 115.

[0046] After the turning frame 11 is turned over to 180 degrees, the air pump 13 and the air valve 115 are started. The air pump 13 injects air into the water tank 12, and the air pressure pushes the water downward. As the air flow is injected, the tire is filled with liquid, and the excess air therein is discharged from the air valve 115.

[0047] After the tire cavity is filled with liquid, the air valve 115 is closed, and the sealing rubber pad 116 forms an airtight fit with the adsorption groove on the rotating disk 23, so that the sealing cover plate 113 cooperates with the rotating disk 23 to produce a bidirectional rigid clamping of the tire.

[0048] After filling is completed, the stepper motor 2 is started, the rotating shaft 24 rotates, the gear three 21 rotates under control, the gear three 21 meshes with the ring gear 22, the ring gear 22 rotates, and then drives the rotating disk 23 to rotate, the tire rotates, and drives the sealing bottom plate 1131 to rotate. The spray part 17 evenly sprays the marking liquid onto the outer surface of the tire. The marking liquid reacts with the moisture seeping from the tire surface to form a differentiated color mark at the leakage point, accurately locating the defect position. The operator can quickly identify the leakage area based on the marked point and guide subsequent repair or replacement.

[0049] refer to Figure 5 To facilitate the timely discharge of liquid from the tire cavity from the leakage point, this device is implemented by an extrusion assembly. Through mechanical clamping and periodic squeezing action, the liquid is prompted to flow out quickly from the leakage point. The flip frame 11 is slidably connected to two groups of symmetrically distributed sliding frames 3 through support ears 37. The sliding frames 3 are each connected to two symmetrically distributed arc-shaped clamping members 34. The ends of the two clamping members 34 are both connected to rollers 36 to avoid damaging the tread. Through the movement of the sliding frame 3, the clamping members 34 apply intermittent pressure to the tire sidewall, forcing the liquid to seep out from the leakage point at an accelerated rate. A torsion spring 35 is compressed between the end of the sliding frame 3 and the clamping member 34 to drive the clamping member 34 to reset.

[0050] The fixed end of the telescopic member 31 is hinged on the sliding frame 3, and a locking member 33 is fixed to the bottom of the sliding member 111. The locking member 33 is hinged to the telescopic end of the telescopic member 31. A return spring 32 is compressed between the fixed end and the telescopic end of the telescopic member 31. The sliding member 111, the telescopic member 31 and the sliding frame 3 form a connecting rod linkage structure. The downward movement of the sliding member 111 synchronously drives the telescopic member 31 and the sliding frame 3 to move. The movement of the sliding frame 3 enables the clamping member 34 to complete the automatic clamping and squeezing of the tire.

[0051] Through the downward movement of the sliding member 111 during the movement of the flip frame 11, the extended end of the telescopic member 31 is driven to contract, and the return spring 32 is deformed. Through the action of the telescopic member 31, the sliding frame 3 moves toward the tire, and the two clamping members 34 contact the tire sidewall. The two clamping members 34 are compressed and stretched open, and the torsion spring 35 is deformed. Based on the action of the torsion spring 35, the two clamping members 34 maintain the automatic clamping and squeezing action on the tire sidewall. The tire is pressurized, and the liquid flows out quickly from the leakage point, and a color reaction occurs quickly, and the defect position is accurately located.

[0052] refer to Figure 6In order to solve the problem of liquid seepage from micron-sized cracks on the tire surface, the device is implemented by cooperating with a pushing assembly in the following manner: a cam 41 is keyed to the rotating shaft 24, a connecting rod 42 is fixed to the eccentric shaft neck of the cam 41, an extrusion piece 43 is connected to the connecting rod 42, and a guide frame 4 is fixed to the limiting plate 118. One end of the extrusion piece 43 is slidably connected to the guide frame 4, and the guide frame 4 guides the movement of the extrusion piece 43, converting the rotational motion of the cam 41 into a linear reciprocating motion. The extrusion piece 43 acts on the tire surface, aiming to drive the cam 41 to rotate through the rotating shaft 24, and then linking the connecting rod 42 and the extrusion piece 43 to rotate. Under the action of the guide frame 4, the extrusion piece 43 moves regularly and acts on the tire surface intermittently, squeezing the tire and driving the liquid to seep out along the cracks.

[0053] As the stepper motor 2 starts, the rotating shaft 24 rotates, the gear three 21 rotates in a controlled manner, the gear three 21 meshes with the ring gear 22, the ring gear 22 rotates, and then drives the rotating disk 23 to rotate, the tire rotates, the cam 41 rotates in a controlled manner, and the linkage connecting rod 42 rotates. Under the action of the guide frame 4, the extrusion member 43 acts intermittently on the tire surface, and cooperates with the automatic clamping and squeezing action of the clamping member 34 on the tire, driving the liquid to seep out directionally along the crack, and the spray member 17 evenly sprays the marking liquid onto the outer surface of the tire. After the marking liquid comes into contact with the moisture seeping from the tire surface, a color reaction occurs, forming a differentiated color mark at the leakage point, accurately locating the defect position, and the operator can quickly identify the leakage area according to the marked point to guide subsequent repair or replacement.

[0054] The marking is completed. In order to ensure the safe reset of the tire during the detection process, the flip frame 11 needs to be flipped and reset again so that the tire is reset to a high position and removed. Based on this, the sealing cover plate 113 needs to cancel the pressing action on the tire only when the tire is reset to a high position. Before this, the sealing cover plate 113 needs to always press the tire to prevent the tire from flipping and falling. Therefore, this device is achieved through the following settings.

[0055] refer to Figure 7 The bottom of the sliding member 111 is fixedly connected to a base plate 117, and a limiting member 5 is slidably connected to the base plate 117. A locking spring 51 is compressed between the limiting member 5 and the base plate 117. Pin holes 53 are opened on the guide rods 119. The ends of the limiting members 5 can cooperate with the pin holes 53 to realize the locking of the sliding member 111. Two symmetrically distributed wedge members 52 are fixedly connected to the testing platform 1, and the purpose is to move the limiting member 5 and lock it with the pin hole 53 through the cooperation between the wedge member 52 and the limiting member 5.

[0056] During the initial flipping movement of the flip frame 11, the sliding member 111 moves downward, driving the base plate 117 and the limiting member 5 to move downward. The limiting member 5 moves downward and squeezes the end of the wedge member 52, causing the limiting member 5 to move and lock with the pin hole 53. The locking spring 51 deforms, thereby limiting the movement of the sliding member 111. At this time, the two clamping members 34 maintain the automatic clamping and squeezing action on the tire sidewall, and the sealing cover plate 113 cooperates with the rotating disk 23 to produce a two-way rigid clamping of the tire. Subsequently, the sliding member 111 continues to flip.

[0057] After the marking action is completed, the servo motor 18 is started, and the gear 2 110 is engaged with the gear 1 19, driving the turning frame 11 to continue to rotate clockwise around its axis, driving the water tank 12, the rotating disk 23 and the tire connected to the turning frame 11 to turn over and reset synchronously. During the turning process, the tire is in a locked state due to the cooperation between the limiting member 5 and the pin hole 53, and the sliding member 111 is always pressed and will not slip.

[0058] When the tire is reset and rotated to the high position, the tire cavity is in a negative pressure state. At this time, the air valve 115 is opened and the air pump 13 is closed, and air enters the tire cavity. As the water tank 12 turns over, the excess liquid in the tire cavity flows back into the water tank 12.

[0059] Pull out the limiting member 5, so that the limiting member 5 moves to cancel the lock with the pin hole 53, the sliding member 111 moves up, and the sealing cover plate 113 moves up in conjunction, canceling the pressing effect on the tire. As the sliding member 111 moves up, the reset spring 32 resets, and the telescopic end of the reset spring 32 resets, thereby linking the sliding frame 3 to move away from the tire and reset. The two clamping members 34 simultaneously move away from the tire and reset. Based on the existence of the torsion spring 35, the two clamping members 34 rotate and reset. When the flip frame 11 is successfully reset, the water tank 12 is located at the bottom of the tire, and the relevant personnel can remove the tire after inspection.

[0060] In order to ensure the reliable operation of the servo motor 18 and the stepper motor 2 under working conditions, the servo motor 18 and the stepper motor 2 are both covered with protective shells.

[0061] In summary, the present device drives the rotating disk 23 to rotate by meshing the gear 3 21 with the gear ring 22, thereby driving the tire to rotate, and the spraying part 17 evenly sprays the marking liquid onto the outer surface of the tire. The marking liquid reacts with the moisture seeping from the tire surface to form a differentiated color mark at the leakage point, accurately locating the defect position. The operator can quickly identify the leakage area according to the mark point and guide the subsequent repair or replacement, avoiding the omission caused by manual identification and affecting the detection accuracy; by turning over the accelerated perfusion mode, the turning frame 11 is driven to rotate around its axis, thereby driving The water tank 12, the rotating disk 23 and the tire, which are dynamically connected to the turning frame 11, turn synchronously. Under the action of the air pump 13, the liquid is accelerated to be poured into the inner cavity of the tire, shortening the filling cycle and ensuring efficient and accurate quantitative filling effect; through the clamping component and the limit plate 118, the sealing cover plate 113 cooperates with the rotating disk 23 to achieve the clamping effect of the tire and ensure the absolute stability of the tire during the turning process; through the deflation component, the residual gas in the inner cavity of the tire is discharged, which facilitates the filling of liquid, thereby achieving two-way rigid clamping of the top and bottom of the tire by the sealing cover plate 113 and the rotating disk 23.

[0062] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An air tightness testing device for automobile parts, comprising a testing table (1), characterized in that: The detection table (1) is provided with a controlled rotating turning frame (11), the turning frame (11) is provided with a water tank (12), the turning frame (11) is provided with a controlled rotating rotating disk (23), the water tank (12) is provided with a connecting pipe, the detection table (1) is provided with a marking liquid storage tank (15), the detection table (1) is provided with a connecting frame (16), the connecting frame (16) is provided with a spraying member (17), and the spraying member (17) is connected to the marking liquid storage tank (15) through a spraying pipe (161).

2. The airtightness testing device for automobile parts according to claim 1, characterized in that: The rotating disk (23) is provided with a gear ring (22), the detection table (1) is provided with a turning frame (11), the turning frame (11) is rotatably connected to the rotating disk (23), a stepping motor (2) is mounted on the turning frame (11), a rotating shaft (24) is provided on the stepping motor (2), a gear three (21) is provided on the rotating shaft (24), and an air pump (13) is provided on the water tank (12).

3. The airtightness testing device for automobile parts according to claim 2, characterized in that: The detection platform (1) is provided with a servo motor (18), the servo motor (18) is provided with a gear 1 (19), the flip frame (11) is provided with a gear 2 (110), the gear 2 (110) is meshed with the gear 1 (19), and the flip frame (11) is provided with a limit plate (118).

4. The airtightness testing device for automobile parts according to claim 3, characterized in that: The flip frame (11) is provided with two groups of guide rods (119), each of the guide rods (119) is provided with a sliding member (111), a sealing cover plate (113) is provided between the two sliding members (111), a sliding groove is provided on the sealing cover plate (113), and a sealing bottom plate (1131) is provided in the sliding groove. The inspection table (1) is provided with two groups of semi-arc guide rails (14), the sliding member (111) is provided with a drag reduction wheel (112), and the drag reduction wheel (112) is slidably connected in the guide rail (14). A compression spring (114) is provided between the sliding member (111) and the sealing cover plate (113).

5. The airtightness testing device for automobile parts according to claim 4, characterized in that: A sealing rubber pad (116) is provided on the sealing cover plate (113), a breathable valve (115) is installed through the sealing cover plate (113) and the sealing bottom plate (1131), a switch is provided on the breathable valve (115), an adsorption groove is provided on the rotating disk (23), and the sealing rubber pad (116) forms an airtight fit with the adsorption groove on the rotating disk (23).

6. The airtightness testing device for automobile parts according to claim 4, characterized in that: Two sets of sliding frames (3) are slidably connected to the flip frame (11) via supporting ears (37), and the sliding frames (3) are each provided with two arc-shaped clamping members (34). Both clamping members (34) are provided with rollers (36), and a torsion spring (35) is provided between the sliding frame (3) and the clamping members (34).

7. The airtightness testing device for automobile parts according to claim 6, characterized in that: A telescopic member (31) is provided on the sliding frame (3), a locking member (33) is provided on the sliding member (111), the locking member (33) is hinged to the telescopic end of the telescopic member (31), and a return spring (32) is provided on the telescopic member (31).

8. The airtightness testing device for automobile parts according to claim 7, characterized in that: The sliding member (111) is provided with a base plate (117), the base plate (117) is provided with a limiting member (5), a locking spring (51) is provided between the limiting member (5) and the base plate (117), a pin hole (53) is provided on the guide rod (119), and two symmetrically distributed wedge members (52) are provided on the detection platform (1), and the wedge members (52) are squeeze-fitted with the limiting member (5).

9. The airtightness testing device for automobile parts according to claim 2, characterized in that: A cam (41) is provided on the rotating shaft (24), a connecting rod (42) is provided on the cam (41), an extrusion member (43) is provided on the connecting rod (42), a guide frame (4) is provided on the limiting plate (118), and the extrusion member (43) is in sliding connection with the guide frame (4).

10. The airtightness testing device for automobile parts according to claim 2 and claim 3, characterized in that: The servo motor (18) and the stepper motor (2) are both covered with protective shells.

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