A plastic dipping lifting structure and automatic plastic dipping production line

Abstract

The application relates to a plastic dipping lifting structure which comprises a fixed frame and a conveying track, a plurality of groups of plastic dipping trailers are movably arranged on the conveying track, the conveying track passes through the fixed frame, a lifting mechanism is arranged in the fixed frame, the lifting mechanism comprises a driving assembly and a lifting frame connected to the driving assembly, a lifting track is connected to the lifting frame, the conveying track is provided with a breakage position corresponding to the position of the lifting frame, the breakage position is connected with the lifting track, a vibrating mechanism is arranged on the lifting frame, the vibrating mechanism can be connected with the plastic dipping trailer and drive the plastic dipping trailer to vibrate. The application can realize synchronous vibration operation in the process of lifting and plastic dipping of workpieces, can make the plastic dipping of complex positions such as dishwasher basket welding points and dead angles sufficient and uniform, can effectively eliminate quality defects such as iron leakage, powder accumulation and uneven plastic layer, can improve the plastic dipping forming quality, and meanwhile, the automatic plastic dipping production line is provided with a lifting detection water tank, can realize online full detection of workpieces, can replace the traditional manual sampling inspection mode, and can stabilize the product qualified rate.

Description

Technical Field

[0001] This application relates to the field of dip coating production technology, and in particular to a dip coating lifting structure and an automatic dip coating production line. Background Technology

[0002] Dip coating technology, with its advantages of corrosion resistance, insulation, wear resistance, and aesthetic appeal, is widely used in the surface protection processing of metal products such as hardware accessories, metal rods, daily hardware, and automotive parts. Dishwasher pull-out baskets, as components used for extended periods in high-temperature, high-humidity, and highly corrosive water environments, require extremely high integrity of the dip coating layer on their metal surfaces.

[0003] Dishwasher pull-out baskets are typically welded from multiple metal rods of different shapes, resulting in numerous weld points, dense corners, and complex dead zones. During the dip-coating process, it is crucial to ensure that the weld points, corners, and other areas are evenly and completely covered by the plastic layer to prevent "exposed metal." Once "exposed metal" occurs, the metal substrate will rapidly corrode and break under high temperature and humidity conditions, directly leading to severe damage to the overall lifespan of the pull-out basket. Therefore, the uniformity of the dip-coating and the effectiveness of detecting exposed metal defects are the core factors determining the quality of dishwasher pull-out baskets.

[0004] Currently, the mainstream in the industry is the suspended continuous dip coating production line. Workpieces flow along a conveyor track via a suspended trailer, sequentially completing processes such as cleaning, rust removal, preheating, dip coating, cooling, and testing. Automated continuous operation has become the industry standard. Existing technologies include some dip coating production lines with lifting structures, such as Chinese Patent No. CN223800850U, published on January 16, 2026, which discloses a dual-track dip coating production line. This line includes a drive track, a conveyor track, a lifting track, a dip coating tank, a lifting device, and a moving component. The drive track and conveyor track are arranged side-by-side. The lifting track slides and rises relative to the conveyor track. The dip coating tank is located below the lifting track. The lifting device moves along the length of the conveyor track to lift the workpiece. The moving component moves along the length of the drive track and is detachably connected to the lifting device to move it. The conveyor track has a notch. After the lifting track rises and falls, it enters the notch and connects with the conveyor track, or disengages from the notch and moves the lifting device closer to the dip coating tank.

[0005] The aforementioned application achieves workpiece lifting and dip coating by disconnecting the track and splicing the lifting track, which simplifies the equipment structure to some extent. However, it still has obvious defects when applied to complex workpieces such as dishwasher baskets, such as uneven dip coating, local powder accumulation, unstable dip coating at some points, or incomplete coating leading to "iron leakage". Moreover, the application lacks an online inspection mechanism and can only rely on manual offline sampling inspection, which is inefficient, has a high rate of missed inspection, and makes it difficult to guarantee product quality stability. Therefore, it is necessary to design a dip coating lifting structure and an automatic dip coating production line that can ensure uniform dip coating, complete coating of corners and weld points, efficient online inspection, and guarantee product qualification rate and production line stability. Summary of the Invention

[0006] This application provides a dip coating lifting structure and an automatic dip coating production line, which can ensure uniform dip coating, complete coverage of corners and weld points, efficient online inspection, and guarantee product qualification rate and production line stability.

[0007] The dip-coating lifting structure provided in this application adopts the following technical solution: A dip-coating lifting structure includes a fixed frame and a conveying rail. Multiple dip-coating trailers are movably mounted on the conveying rail, which passes through the fixed frame. A lifting mechanism is installed within the fixed frame, and a dip-coating box containing dip-coating powder is located below the lifting mechanism. The lifting mechanism includes a drive assembly and a lifting frame connected to the drive assembly. A lifting rail is connected to the lifting frame. The conveying rail has a disconnection point corresponding to the position of the lifting frame, and the disconnection point is connected to the lifting rail. A vibration mechanism is installed on the lifting frame, which can connect with the dip-coating trailers and drive them to vibrate.

[0008] Furthermore, the conveying track includes a trailer track and a drive track arranged parallel to each other. The dipped trailer is arranged on the trailer track. The trailer track has a disconnect position that is connected to the lifting track. The drive track is a suspended conveyor chain. A drive bracket is connected to the drive track. The drive bracket can connect to the dipped trailer and drive the dipped trailer to move along the trailer track.

[0009] Furthermore, the dip-coated trailer includes a connecting rod, with multiple hanging rods at the lower part of the connecting rod. A hinged arm is provided on the connecting rod, and a traveling wheel is mounted on the upper end of the hinged arm, which slides in cooperation with the trailer track through the traveling wheel. A transmission rod is provided on the side of the connecting rod, which faces the drive track and has a T-shaped end. The lower part of the drive bracket is shaped like an "8", and the upper part of the drive bracket consists of parallel rods. The transmission rod can be inserted into the drive bracket from bottom to top.

[0010] Furthermore, the drive bracket is inclined toward the side away from the dip-coated trailer, and the transmission rod can pull the drive bracket to move toward the side of the dip-coated trailer, and the two are tightly connected.

[0011] Furthermore, the drive assembly includes a lifting motor and a lifting plate. The lifting motor is located in the middle of the fixed frame, and the lifting plate is vertically arranged inside the fixed frame. A position detection switch is provided on the side of the lifting plate, and a protrusion corresponding to the position detection switch is provided on the side of the fixed frame. Output shafts are provided on both the left and right sides of the lifting motor. A first sprocket and a second sprocket are respectively connected to the output shafts on the left and right sides of the lifting motor. Both the first sprocket and the second sprocket are double-row sprockets. A first chain and a second chain are driven through the first sprocket, and a third chain and a fourth chain are driven through the second sprocket. One end of the first chain, the second chain, the third chain, and the fourth chain is connected to the lifting plate, and the other end of the first chain, the second chain, the third chain, and the fourth chain is connected to the four corners of the lifting frame. The lifting frame and the lifting plate move synchronously and in opposite directions.

[0012] Furthermore, the position detection switch is electrically connected to the vibration mechanism via a controller. The position detection switch is used to detect the position of the lifting plate and trigger the vibration mechanism when the lifting plate is in position.

[0013] Furthermore, a guide sleeve is connected to the fixed frame, and a guide column matching the guide sleeve is provided on the lifting frame. Multiple positioning parts are provided on both sides of the rear end of the lifting frame, and the positioning parts can connect with the two inner sides of the rear end of the fixed frame.

[0014] Furthermore, the vibration mechanism includes a vibration drive, an eccentric wheel connected to the output end of the vibration drive, a vibration rod rotatably connected to the eccentric wheel, a vibration frame rotatably connected to the vibration rod, the vibration frame being sleeved on the outside of the lifting track and a gap being provided between the vibration frame and the lifting track, and a guide rod being provided on the lifting track and passing through the vibration frame.

[0015] This application also provides an automated dip coating production line, with the following technical solution: An automatic dip coating production line includes the above-mentioned dip coating lifting structure, and also includes an ultrasonic cleaning mechanism, a rust removal mechanism, a preheating mechanism, a cooling mechanism, and a testing mechanism. The lifting structure is located between the preheating mechanism and the cooling mechanism.

[0016] Furthermore, the testing mechanism includes multiple sets of lifting testing water tanks, each corresponding to a single workpiece carried by the dip-coated trailer. The lifting testing water tank is filled with a conductive medium, and a testing terminal connected to the testing circuit is mounted on the lifting testing water tank. A power supply and an alarm device are connected in sequence to the testing circuit. The conductive medium is used to perform insulation testing on the dip-coated layer of the workpiece. When there is a defect in the dip-coated layer, the conductive medium will contact and conduct with the metal substrate of the workpiece. The resistance of the testing circuit deviates from the qualified range, and the alarm device will issue an alarm signal.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. This application features a disconnection position on the conveyor track and a lifting mechanism at the disconnection position. The lifting mechanism is equipped with a vibration mechanism, which can drive the dip coating trailer and the workpiece to sink and be completely immersed in the dip coating. The vibration is synchronized during the dip coating lifting process, which improves the dip coating effect of the workpiece welding points, corners and dead corners. At the same time, it can shake off excess plastic powder, avoid powder accumulation and uneven thickness, effectively eliminate quality defects such as iron leakage and incomplete local coating, and greatly improve the protective performance and service life of the workpiece.

[0018] 2. By setting parallel trailer tracks and drive tracks, the load-bearing and power transmission are independent of each other, ensuring stable operation of the dip coating lifting and moving work. By setting an "eight"-shaped drive bracket and a T-shaped transmission rod at the end, a stable connection between the transmission rod and the drive bracket can be ensured. At the same time, the drive bracket is tilted so that it can pull the drive bracket to move when the transmission rod is inserted into the drive bracket, ensuring a stable connection between the drive bracket and the transmission rod and ensuring the driving effect.

[0019] 3. By setting up a lifting motor and a lifting plate, and connecting a first sprocket and a second sprocket to the output end of the lifting motor, and setting a first chain, a second chain, a third chain, and a fourth chain on the first and second sprockets, synchronous lifting at four points is achieved by four chains; by setting a position detection switch on the lifting plate, and electrically connecting the position detection switch to the vibration mechanism through a controller, the vibration mechanism can be controlled by the position of the lifting plate, which can vibrate while lifting, improving the uniformity of dip coating, and can also realize automatic start and stop through the position detection switch, which is convenient to use; by setting guide sleeves and guide columns on the fixed frame lifting frame, and setting a positioning part at the rear end of the lifting frame and connecting the positioning part to the inner side of the fixed frame, the stable up and down movement of the lifting frame is ensured, ensuring the stability of dip coating.

[0020] This application also proposes an automated dip coating production line, which includes at least one of the following beneficial technical effects: 1. The automated dip coating production line in this application integrates ultrasonic cleaning, rust removal, preheating, dip coating, cooling, and online inspection processes, realizing fully automated workpiece transfer, reducing manual handling and waiting time at workstations, and achieving high integration and improved production efficiency. By setting up a lifting inspection water tank, the integrity of the dip coating layer is fully inspected online using the principle of conductive medium conduction. This can accurately identify minor damage and iron leakage defects and automatically alarm, replacing the traditional manual sampling inspection mode, effectively reducing the probability of missed or false inspections, and ensuring the product qualification rate. Attached Figure Description

[0021] Figure 1 This is a front view of the dip-coated lifting structure in a preferred embodiment of this application.

[0022] Figure 2 This is a perspective view of the dip-coating lifting structure in a preferred embodiment of this application.

[0023] Figure 3 This is a side view of the dip-coated lifting structure in a preferred embodiment of this application.

[0024] Figure 4 This is a perspective view of the dip-coated lifting structure in the preferred embodiment of this application after the fixed frame has been removed.

[0025] Figure 5 This is a perspective view of the dip-coated lifting structure in the preferred embodiment of this application after removing the fixed frame and drive track.

[0026] Figure 6 This is a front view of the dip-coated lifting structure in the preferred embodiment of this application after removing the fixed frame and drive track.

[0027] Figure 7 This is a perspective view of the dip-coated trailer in a preferred embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 101. Guide sleeve; 2. Dip-coated trailer; 201. Connecting rod; 202. Hanging rod; 203. Transmission rod; 3. Lifting mechanism; 301. Drive assembly; 301a. Lifting motor; 301b. Lifting plate; 302. Lifting frame; 302a. Guide column; 302b. Positioning part; 303. Lifting rail; 303a. Guide rod; 4. Vibration mechanism; 401. Vibration drive; 402. Eccentric wheel; 403. Vibration rod; 404. Vibration frame; 5. Trailer rail; 6. Drive rail; 601. Drive bracket; 7. Position detection switch. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings. Example

[0030] This application discloses a dip-coating lifting structure.

[0031] Reference Figures 1 to 7 A dip-coating lifting structure includes a fixed frame 1 and a conveying rail. Multiple dip-coating trailers 2 are movably mounted on the conveying rail. The conveying rail passes through the fixed frame 1. A lifting mechanism 3 is installed inside the fixed frame 1. A dip-coating box containing dip-coating powder is installed below the lifting mechanism 3. The lifting mechanism 3 includes a drive component 301 and a lifting frame 302 connected to the drive component 301. A lifting rail 303 is connected to the lifting frame 302. The conveying rail is disconnected at a position corresponding to the lifting frame 302, and the disconnected position is connected to the lifting rail 303. A vibration mechanism 4 is installed on the lifting frame 302. The vibration mechanism 4 can connect with the dip-coating trailers 2 and drive the dip-coating trailers 2 to vibrate.

[0032] Specifically, in this embodiment, a horizontal position sensor switch for detecting the horizontal position of the dip-coated trailer 2 is provided on the fixed frame 1. The horizontal position sensor switch is electrically connected to the lifting mechanism 3 through a controller. After detecting that the dip-coated trailer 2 has entered the lifting track 303, the sensor switch controls the lifting mechanism 3 to move through the controller and start to automatically descend for dip coating.

[0033] Reference Figure 2 and Figure 6 The conveying track includes a trailer track 5 and a drive track 6 arranged parallel to each other. A dipped trailer 2 is installed on the trailer track 5. The trailer track 5 has a disconnect position that is connected to the lifting track 303. The lifting track 303 is a long track that is narrow at the top and wide at the bottom. Both ends of the lifting track 303 are inclined. The drive track 6 is a suspended conveyor chain. A drive bracket 601 is connected to the drive track 6. The drive bracket 601 can be connected to the dipped trailer 2 and drive the dipped trailer 2 to move along the trailer track 5.

[0034] Reference Figures 2 to 7 The dip-coated trailer 2 includes a connecting rod 201, with multiple hanging rods 202 at the lower part of the connecting rod 201. A hinged arm is mounted on the connecting rod 201, and a traveling wheel is fitted to the upper end of the hinged arm, which slides in cooperation with the trailer track 5 via the traveling wheel. A transmission rod 203 is mounted on the side of the connecting rod 201, facing the drive track 6, and the end of the transmission rod 203 is T-shaped. The lower part of the drive bracket 601 is V-shaped, and the upper part of the drive bracket 601 consists of parallel rods. The transmission rod 203 can be inserted into the drive bracket 601 from bottom to top. The drive bracket 601 is tilted away from the side of the dip-coated trailer 2, and the transmission rod 203 can pull the drive bracket 601 to move towards the side of the dip-coated trailer 2. The two are tightly connected, preventing the dip-coated trailer 2 and the drive bracket 601 from shaking and ensuring stable driving.

[0035] Reference Figures 3 to 5The drive assembly 301 includes a lifting motor 301a and a lifting plate 301b. The lifting motor 301a is located in the middle of the fixed frame 1, and the lifting plate 301b is vertically arranged inside the fixed frame 1. A position detection switch 7 is provided on the side of the lifting plate 301b, and a protrusion corresponding to the position detection switch 7 is provided on the side of the fixed frame 1. Output shafts are provided on both the left and right sides of the lifting motor 301a. A first sprocket and a second sprocket are respectively connected to the output shafts on the left and right sides of the lifting motor 301a. Both the first sprocket and the second sprocket are double-row sprockets. A first chain and a second chain are driven to the first sprocket, and a third chain and a fourth chain are driven to the second sprocket. One end of the first chain, the second chain, the third chain, and the fourth chain is connected to the lifting plate 301b, and the other end of the first chain, the second chain, the third chain, and the fourth chain is connected to the four corners of the lifting frame 302. The lifting frame 302 and the lifting plate 301b move synchronously and in opposite directions.

[0036] Specifically, in this embodiment, a distance sensor for detecting the position of the lifting frame is provided on the fixed frame 1, and the distance sensor is electrically connected to the lifting motor 301a through a controller.

[0037] Reference Figures 3 to 5 The position detection switch 7 is a non-contact travel limit switch. The position detection switch 7 is electrically connected to the vibration mechanism 4 through the controller. The position detection switch 7 is used to detect the position of the lifting plate 301b and trigger the vibration mechanism 4 when the lifting plate 301b is in place, so as to ensure that the lifting mechanism 3 and the vibration mechanism 4 can act simultaneously, improve the uniformity of the workpiece dip coating, and avoid the phenomenon of "iron leakage" of the workpiece.

[0038] Reference Figures 1 to 4 A guide sleeve 101 is connected to the fixed frame 1. A guide post 302a matching the guide sleeve 101 is provided on the lifting frame 302. Multiple positioning parts 302b are provided on both sides of the rear end of the lifting frame 302. The positioning parts 302b can connect with the two inner sides of the rear end of the fixed frame 1. The guide sleeve 101 and the positioning parts 302b can position the lifting frame 302 to ensure stable lifting.

[0039] Reference Figures 4 to 6 The vibration mechanism 4 includes a vibration drive 401, an eccentric wheel 402 connected to the output end of the vibration drive 401, a vibration rod 403 rotatably connected to the eccentric wheel 402, a vibration frame 404 rotatably connected to the vibration rod 403, the vibration frame 404 is sleeved on the outside of the lifting rail 303 and a gap is provided between the vibration frame 404 and the lifting rail 303, a guide rod 303a is provided on the lifting rail 303 and the guide rod 303a passes through the vibration frame 404 to ensure the vibration effect of the vibration frame 404. Example

[0040] An automated dip coating production line includes the dip coating lifting structure of Embodiment 1, and further includes an ultrasonic cleaning mechanism, a rust removal mechanism, a preheating mechanism, a cooling mechanism, and a detection mechanism. The lifting structure is located between the preheating mechanism and the cooling mechanism. The detection mechanism includes multiple sets of lifting detection water tanks, each corresponding to a single workpiece carried by the dip coating trailer. The lifting detection water tanks are filled with a conductive medium, and are equipped with detection terminals connected to a detection circuit. A power supply and an alarm device are sequentially connected to the detection circuit. The conductive medium is used to perform insulation detection on the dip coating layer of the workpiece. When there is a defect in the dip coating layer, the conductive medium will contact and conduct with the metal substrate of the workpiece, and the resistance of the detection circuit will deviate from the qualified range, triggering an alarm signal from the alarm device.

[0041] The automated dip coating production line in this embodiment integrates ultrasonic cleaning, rust removal, preheating, dip coating, cooling, and online inspection processes to achieve fully automated flow of dip-coated workpieces. This reduces manual handling and waiting time at workstations, resulting in high line integration and improved production efficiency. The lifting mechanism is equipped with a vibration mechanism that vibrates synchronously during the dip coating lifting process, improving the dip coating effect at workpiece welding points, corners, and dead corners. By setting up an inspection mechanism and a lifting inspection water tank, the integrity of the dip coating layer is fully inspected online using the principle of conductive medium conduction. This can accurately identify minor damage and iron leakage defects and automatically alarm, replacing the traditional manual sampling mode, effectively reducing the probability of missed or false inspections, and ensuring product qualification rate.

[0042] Specifically, in this embodiment, the drive rail 6 is an intermittent conveyor type. The drive rail 6 pulls the dip coating trailer 2 to move intermittently in steps, stopping at fixed points at the ultrasonic cleaning station, rust removal station, preheating station, dip coating station, cooling station, and online inspection station. Each station can be configured with different resting times as needed, only ensuring that the resting time of the dip coating station meets the requirements of the workpiece lifting and dip coating operation. In this embodiment, the resting time of the dip coating station is 40 seconds.

[0043] In this embodiment, multiple workpieces are hung on the hanging rods 202 of the dip-coating trailer 2. The dip-coating trailer 2 is driven by the drive bracket 601 on the drive rail 6, passing through the ultrasonic cleaning mechanism, the rust removal mechanism, and the preheating mechanism in sequence before reaching the position of the fixed frame 1. At this time, the lifting rail 303 is aligned with the disconnection position of the trailer rail 5. The dip-coating trailer 2 enters the lifting rail 303 under the drive of the drive bracket 601. After the horizontal position sensor switch detects that the dip-coating trailer 2 has arrived, the controller controls the lifting mechanism 3 to drive the lifting rail 303 and the workpieces to descend and immerse in the dip-coating powder.

[0044] Specifically, the output of the lifting motor 301a generates power, which drives the lifting plate 301b and the lifting frame 302 to move through the double-row sprockets, the first chain, the second chain, the third chain, and the fourth chain. The lifting track 303 descends, and during the descent, the lifting plate 301b rises. When the lifting plate 301b reaches its position, it triggers the position detection switch 7. The controller controls the vibration mechanism 4 to work. While the lifting frame 302 descends, the vibration mechanism 4 moves to drive the workpiece to vibrate. The workpiece vibrates during the process of being immersed in the dip coating powder, ensuring that the edges and corners and weld points are fully coated with powder and that excess powder is shaken off, thus ensuring uniform dip coating and preventing iron leakage.

[0045] During the dip coating process, the distance sensor on the fixed frame 1 detects the position of the lifting frame and controls the lifting motor 301a to reverse, controlling the lifting frame 302 to rise. During the rising process, the frame vibrates synchronously. After rising to a certain position, the position detection switch 7 is triggered again, and the controller controls the vibration mechanism 4 to stop. The lifting frame 302 continues to rise until the distance sensor detects the position and the dip coating is completed. The vibration is stopped in advance so that the transmission rod 203 can be connected to the drive bracket 601, which facilitates the subsequent movement of the dip coating trailer 2. After the dip coating is completed, the dip coating trailer 2 is pulled by the drive bracket 601 to continue moving in the trailer track 5. The workpiece reaches the cooling station for cooling. After cooling, the workpiece reaches the detection mechanism, and the lifting detection water tank is activated. The workpieces fall into the corresponding lifting detection water tank one by one. The insulation continuity is detected by the conductive medium. If the plastic layer is damaged and iron is exposed, the circuit is connected and an alarm is triggered. Defective parts are quickly sorted, and qualified products are transferred to the warehouse. The entire process is automated and continuous, ensuring stable finished product quality.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dip-coated lifting structure, characterized in that: The system includes a fixed frame (1) and a conveying track. Multiple sets of dip-coating trailers (2) are movably arranged on the conveying track. The conveying track passes through the fixed frame (1). A lifting mechanism (3) is provided inside the fixed frame (1). A dip-coating box is provided below the lifting mechanism (3). Dip-coating powder is provided inside the dip-coating box. The lifting mechanism (3) includes a drive assembly (301) and a lifting frame (302) connected to the drive assembly (301). A lifting track (303) is connected to the lifting frame (302). The conveying track is disconnected at the position corresponding to the lifting frame (302), and the disconnected position is connected to the lifting track (303). A vibration mechanism (4) is provided on the lifting frame (302). The vibration mechanism (4) can connect with the dip-coating trailers (2) and drive the dip-coating trailers (2) to vibrate.

2. The dip-coated lifting structure according to claim 1, characterized in that: The conveying track includes a trailer track (5) and a drive track (6) arranged parallel to each other. The dipped trailer (2) is arranged on the trailer track (5). The trailer track (5) has a disconnection position that is connected to the lifting track (303). The drive track (6) is a suspended conveyor chain. A drive bracket (601) is connected to the drive track (6). The drive bracket (601) can connect to the dipped trailer (2) and drive the dipped trailer (2) to move along the trailer track (5).

3. The dip-coated lifting structure according to claim 2, characterized in that: The dip-coated trailer (2) includes a connecting rod (201), with multiple hanging rods (202) at the lower part of the connecting rod (201). A hinge arm is provided on the connecting rod (201), and a traveling wheel is mounted on the upper end of the hinge arm, which slides in cooperation with the trailer track (5) through the traveling wheel. A transmission rod (203) is provided on the side of the connecting rod (201), which faces the drive track (6) and has a T-shaped end. The lower part of the drive bracket (601) is shaped like an "eight", and the upper part of the drive bracket (601) consists of parallel rods. The transmission rod (203) can be inserted into the drive bracket (601) from bottom to top.

4. The dip-coated lifting structure according to claim 2, characterized in that: The drive bracket (601) is inclined toward the side away from the dip-coated trailer (2), and the transmission rod (203) can pull the drive bracket (601) toward the side of the dip-coated trailer (2), and the two are closely connected.

5. The dip-coated lifting structure according to claim 4, characterized in that: The drive assembly (301) includes a lifting motor (301a) and a lifting plate (301b). The lifting motor (301a) is located in the middle of the fixed frame (1), and the lifting plate (301b) is vertically arranged inside the fixed frame (1). A position detection switch (7) is provided on the side of the lifting plate (301b), and a protrusion corresponding to the position detection switch (7) is provided on the side of the fixed frame (1). Output shafts are provided on both the left and right sides of the lifting motor (301a), and the output shafts on the left and right sides of the lifting motor (301a) are... The first sprocket and the second sprocket are connected to each other respectively. Both the first sprocket and the second sprocket are double-row sprockets. The first sprocket is connected to the first chain and the second chain, and the second sprocket is connected to the third chain and the fourth chain. One end of the first chain, the second chain, the third chain and the fourth chain is connected to the lifting plate (301b). The other end of the first chain, the second chain, the third chain and the fourth chain is connected to the four corners of the lifting frame (302). The lifting frame (302) and the lifting plate (301b) move synchronously and in opposite directions.

6. The dip-coated lifting structure according to claim 5, characterized in that: The position detection switch (7) is electrically connected to the vibration mechanism (4) through a controller. The position detection switch (7) is used to detect the position of the lifting plate (301b) and trigger the vibration mechanism (4) when the lifting plate (301b) is in position.

7. The dip-coated lifting structure according to claim 1, characterized in that: The fixed frame (1) is connected to a guide sleeve (101), and the lifting frame (302) is provided with a guide post (302a) that matches the guide sleeve (101). Multiple positioning parts (302b) are provided on both sides of the rear end of the lifting frame (302), and the positioning parts (302b) can be connected to the two inner sides of the rear end of the fixed frame (1).

8. The dip-coated lifting structure according to claim 1, characterized in that: The vibration mechanism (4) includes a vibration drive (401), an eccentric wheel (402) is connected to the output end of the vibration drive (401), a vibration rod (403) is rotatably connected to the eccentric wheel (402), a vibration frame (404) is rotatably connected to the vibration rod (403), the vibration frame (404) is sleeved on the outside of the lifting rail (303) and there is a gap between the vibration frame (404) and the lifting rail (303), a guide rod (303a) is provided on the lifting rail (303) and the guide rod (303a) passes through the vibration frame (404).

9. An automatic dip coating production line, characterized in that: The dip-coating lifting structure according to any one of claims 1 to 8 further includes an ultrasonic cleaning mechanism, a rust removal mechanism, a preheating mechanism, a cooling mechanism, and a detection mechanism, wherein the lifting structure is located between the preheating mechanism and the cooling mechanism.

10. An automatic dip coating production line according to claim 9, characterized in that: The testing mechanism includes multiple sets of lifting testing water tanks, each set of lifting testing water tanks corresponding to a single workpiece carried by the dip-coated trailer (2). The lifting testing water tank is filled with a conductive medium, and the lifting testing water tank is equipped with a testing terminal connected to the testing circuit. The testing circuit is connected to a power supply and an alarm device in sequence. The conductive medium is used to perform insulation testing on the dip-coated layer of the workpiece. When there is a defect in the dip-coated layer, the conductive medium will contact and conduct with the metal substrate of the workpiece. The resistance of the testing circuit deviates from the qualified range, and the alarm device sends an alarm signal.

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