Suspension conveying device for electrophoretic coating

Abstract

The invention relates to the technical field of electrophoretic coating conveying, and discloses a suspension conveying device for electrophoretic coating, which comprises two parallel bridge type supports, a suspension guide rail assembly is arranged on the bridge type supports, and a moving table transversely moving along the length direction of the suspension guide rail assembly is arranged below the suspension guide rail assembly. An electrophoresis tank is arranged between the two bridge type supports, a lifting column is arranged in the middle of the moving table, a lifting carrying table is arranged at the end, close to the ground, of the lifting column, a driving plate is fixedly connected to the middle of the lifting column, connecting rods are rotatably connected to the two ends of the driving plate, and translation rods slidably connected with the lifting carrying table are rotatably connected to the ends, away from the driving plate, of the connecting rods; the two translation rods synchronously move in opposite directions; and the device further comprises a lifting mechanism and a limiting mechanism. Through collaborative design of the limiting mechanism and the lifting mechanism, a complex lifting driving system which must be integrated on a moving part in a traditional scheme is thoroughly separated from a control system, and the structure of the moving table and the follow-up line arrangement are greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of electrophoretic coating conveying technology, specifically a suspended conveying device for electrophoretic coating. Background Technology

[0002] Electrophoretic coating, an advanced surface treatment technology based on electrochemical principles, centers on the directional migration and deposition of charged coating particles dispersed in water onto the workpiece surface, which serves as the electrode, under the influence of a direct current electric field. This results in a uniform and dense protective or decorative coating. In this process, the overhead conveyor system is the core material transport system, running through the entire process from pretreatment and electrophoresis to post-cleaning and baking. Its design directly determines the production line layout, coating quality consistency, production cycle time, and energy consumption, making it a crucial decision-making element in the planning and construction of electrophoretic coating lines.

[0003] Currently, the most common suspended conveyor systems in the industry typically use rigid guide rails fixed to the top of the workshop as the moving path. A mobile platform (or carriage), driven by electricity or chains, moves horizontally along the guide rails. To facilitate the entry and exit of workpieces from the tank, the mobile platform often integrates an independently controllable lifting and lowering drive mechanism, connected to and adjusting the workpiece height via a lifting device. When a workpiece needs to be immersed in the electrophoresis tank, the mobile platform is first positioned above the tank, then the lifting mechanism drives the workpiece down. After immersion, the workpiece is lifted again, and the mobile platform continues to transport the workpiece to the next workstation. This conventional solution has revealed inherent flaws in practice. As a moving unit, the mobile platform needs to continuously provide power and control signals to the attached lifting drive device. This inevitably involves the complex arrangement of accompanying power cables and communication lines, increasing the complexity of the system structure and posing risks of line wear, entanglement, and even short circuits. Maintenance is also inconvenient, making it imperative to optimize the reliability, efficiency, and flexibility of existing devices. Summary of the Invention

[0004] The purpose of this invention is to provide a suspended conveyor for electrophoretic coating, so as to solve the technical problem of complicated power supply and communication line layout of the driving device on the moving platform in the prior art.

[0005] A suspended conveyor for electrophoretic coating includes two parallel bridge supports, with a suspension guide rail assembly on each bridge support. A moving platform that moves laterally along the length of the suspension guide rail assembly is located below the suspension guide rail assembly. An electrophoresis tank is positioned between the two bridge supports. A lifting column is located in the middle of the moving platform. A lifting platform is located at the end of the lifting column closest to the ground. A drive plate is fixedly connected to the middle of the lifting column. Connecting rods are rotatably connected to both ends of the drive plate. A translation rod that is slidably connected to the lifting platform is rotatably connected to the end of the connecting rod away from the drive plate. The two translation rods move synchronously in opposite directions. The device also includes a lifting mechanism and a limiting mechanism. The limiting mechanism is located on both sides of the bridge supports to limit the maximum distance between the ends of the two translation rods. The lifting mechanism is located on the side wall of the electrophoresis tank to lift the lifting platform upwards. When the two translation rods disengage from the limiting mechanism and the lifting platform is only subjected to gravity, the lifting platform descends into the electrophoresis tank.

[0006] In a preferred embodiment of the present invention, the lifting platform has a clearance opening extending through its thickness in the middle. A support frame is provided on the side of the lifting platform away from the ground. A lifting column is slidably connected to the middle of the support frame. A lifting damping assembly for limiting the moving speed of the lifting column is provided on the support frame. The lifting damping assembly includes a cylinder fixed to the support frame, and a piston slidably connected to and fixedly connected to the lifting column is provided inside the cylinder. The piston has a vent hole.

[0007] In a preferred embodiment of the present invention, the limiting mechanism includes a top rod fixed to the bridge-type support, the end of which is connected to a guide plate. The surface of the guide plate is parallel to the movement trajectory of the moving stage. A guide roller is provided at the end of the translation rod away from the center of the moving stage, and the guide roller makes rolling contact with the surface of the guide plate. An arc-shaped transition plate is fixedly connected to the side of the guide plate near the center of the electrophoresis tank. The arc-shaped transition plate extends obliquely from the main body of the guide plate in a direction away from the electrophoresis tank.

[0008] As a preferred embodiment of the present invention, the lifting mechanism includes a lifting drive device fixedly installed on the outer wall of the electrophoresis tank. The output end of the lifting drive device is connected to a Z-shaped bracket. The vertical section of the Z-shaped bracket extends into the interior of the electrophoresis tank. The end of the Z-shaped bracket is provided with an arc-shaped support head that cooperates with the bottom of the lifting platform. When the lifting drive device is fully extended, the lifting platform is lifted to a high position. At this time, the two guide rollers are respectively located between the two arc-shaped transition plates.

[0009] As a preferred embodiment of the present invention, the suspension guide rail assembly includes a mounting frame fixed to the bridge bracket, a C-shaped rail installed at the bottom of the mounting frame, bearing seats at both ends of the moving platform, and a set of traveling wheels that roll in cooperation with the C-shaped rail installed on the bearing seats.

[0010] In a preferred embodiment of the present invention, a workpiece clamping assembly is provided on the side of the lifting platform, and an auxiliary guide post slidably connected to the moving platform is also provided on the upper surface of the lifting platform. The workpiece clamping assembly includes a rotating base rotatably connected to the side of the lifting platform, a clamping arm fixedly connected to the rotating base, an adjusting rod rotatably connected to the end of the clamping arm, and a mounting plate provided at the end of the adjusting rod.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects: 1. Completely simplified structure and wiring layout of moving components: Through a collaborative design of "mechanical locking + fixed-point lifting," the lifting motor, pump valves, sensors, and associated power cables, control harnesses, and air pipes that must be integrated into the moving platform in traditional solutions are completely eliminated. The moving platform is simplified into a purely mechanical load-bearing and transmission platform, only needing to handle the simple power required for horizontal movement (this power can itself be obtained through non-contact methods or end-pull traction). This fundamentally eliminates inherent problems such as electrical faults, signal interruptions, and maintenance difficulties caused by repeated bending and wear of the accompanying cables, resulting in a qualitative improvement in system reliability.

[0012] 2. A highly efficient, energy-saving, and reliable lifting and locking mechanism is achieved: the device utilizes gravity to lower the workpiece into the slot, resulting in extremely low energy consumption; a fixed power unit centrally lifts the workpiece out of the slot, ensuring high power efficiency. During the conveying section, which accounts for the majority of the time, a cleverly designed limiting mechanism achieves full mechanical self-locking, maintaining the workpiece at a high position without any energy consumption, and ensuring absolute reliability of the locked state. The introduction of a lifting damping component ensures a smooth and buffered descent due to gravity, improving process quality and equipment safety.

[0013] 3. Optimized electrophoresis process quality and production cycle time: Supports horizontal movement of workpieces in the electrophoresis tank, which is beneficial for obtaining a more uniform coating. Fixed-position lifting and paint dripping ensure process consistency. The entire operation cycle is smooth and the timing is controllable, which helps to shorten the processing time per piece and improve the overall cycle time and capacity of the production line.

[0014] 4. Enhanced system flexibility and versatility: The multi-degree-of-freedom adjustable workpiece clamping assembly allows the device to quickly adapt to workpieces of different shapes and sizes, meeting the demands of modern manufacturing for diverse and flexible production. Its robust mechanical structure provides better resistance to the harsh environments of painting workshops, including high temperatures, high humidity, and the presence of chemical media.

[0015] 5. Reduced total lifecycle cost: Eliminates expensive electrical components and frequent maintenance and replacement costs on the moving platform; long mechanical component lifespan and low failure rate; efficient operation reduces energy consumption. From a long-term operational perspective, the total cost of ownership is significantly lower than that of traditional complex-driven overhead conveyor systems. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a suspended conveyor device for electrophoretic coating.

[0018] Figure 2 This is a front view of a suspended conveyor device for electrophoretic coating.

[0019] Figure 3 This is a schematic diagram of the lifting mechanism in a suspended conveyor device for electrophoretic coating.

[0020] Figure 4 This is a schematic diagram of the structure of a suspension guide rail assembly and a moving platform in a suspended conveyor device for electrophoretic coating.

[0021] Figure 5 for Figure 4 The right view.

[0022] Figure 6 This is a schematic diagram of the guide plate in a suspended conveyor device for electrophoretic coating.

[0023] Figure 7 This is a schematic diagram of the suspension guide rail assembly in a suspended conveyor device for electrophoretic coating.

[0024] Figure 8 This is a schematic diagram of the structure of a lifting platform in a suspended conveyor device for electrophoretic coating after it has been raised.

[0025] Figure 9 This is a schematic diagram of the lifting damping component in a suspended conveyor device for electrophoretic coating.

[0026] Figure 10 This is a schematic diagram of the structure of a suspended conveyor device for electrophoretic coating after the lifting platform has descended.

[0027] Figure 11 This is a schematic diagram of a suspended conveyor device for electrophoretic coating, in which the lifting platform is located in the middle of the electrophoresis tank.

[0028] Figure 12 This is a schematic diagram of the structure of a suspended conveyor device for electrophoretic coating, showing the cooperation between the lifting platform and the support mechanism.

[0029] Figure 13 for Figure 12 A magnified view of part A in the diagram.

[0030] In the diagram: 1. Bridge support; 2. Suspension guide rail assembly; 3. Moving platform; 4. Electrophoresis tank; 5. Lifting mechanism; 6. Translation rod; 7. Connecting rod; 8. Drive plate; 9. Lifting platform; 10. Cylinder; 11. Piston; 12. Vent hole; 13. Lifting damping assembly; 14. Auxiliary guide column; 15. Clearance opening; 16. Support frame; 17. Top rod; 18. Guide plate; 19. Guide roller; 20. Limiting mechanism; 21. Workpiece clamping assembly; 22. Bearing seat; 23. Traveling wheel set; 24. C-shaped track; 25. Mounting bracket; 26. Lifting drive device; 27. Arc-shaped support head; 28. Z-shaped bracket; 29. ​​Arc-shaped transition plate; 30. Lifting column; 31. Adjusting rod; 32. Rotating base; 33. Clamping arm; 34. Mounting plate. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0032] In one embodiment, see Figure 1 , Figure 2 , Figure 4 , Figure 8 , Figure 9 and Figure 10A suspended conveyor device for electrophoretic coating includes two parallel bridge supports 1, with the front and rear bridge supports 1 oriented left and right. The flat bridge supports 1 can be fixed to the ceiling or beams of the processing workshop. A suspension guide rail assembly 2 is set below the bridge supports 1. This application only shows a part of the straight section of the suspension guide rail assembly 2. For continuous production processing, the suspension guide rail assembly 2 can be designed as a ring structure to achieve continuous operation. It is only necessary to ensure that the part above the electrophoresis tank 4 is straight. The suspension guide rail assembly 2 is connected to a moving table 3 oriented left and right. Under the action of the suspension guide rail assembly 2, the moving table 3 can move along the length direction of the suspension guide rail assembly 2, that is, the left and right direction. In this application, the workpiece moves from left to right, that is, the moving table 3 moves to the right. A traction device, such as a wheel, can be set on the suspension guide rail assembly 2 so that the moving table 3 can move under the drive of the suspension guide rail assembly 2. The electrophoresis tank 4 is set between the front and rear bridge supports 1.

[0033] A lifting column 30 is vertically arranged in the middle of the moving platform 3. The lower end of the lifting column 30 is fixedly connected to the middle of the upper surface of the lifting platform 9. The lifting platform 9 has a rectangular structure. In order to reduce the weight of the lifting platform 9, multiple weight reduction holes or process holes are opened on the lifting platform 9 while ensuring structural strength. The middle of the driving plate 8 is fixedly connected to the middle of the lifting column 30. The ends of the connecting rods 7 are rotatably connected to both the front and rear ends of the driving plate 8. The end of the connecting rod 7 away from the driving plate 8 is rotatably connected to the end of the translation rod 6 near the center of the moving platform 3. The two translation rods 6 are arranged facing each other and their axes are collinear. The two translation rods 6 are connected to the lower surface of the moving platform 3 through a linear guide rail or a sliding groove. The translation rods 6 can move back and forth along the lower surface of the moving platform 3. When the two translation rods 6 move closer to each other, if the end of the connecting rod 7 near the lifting column 30 is inclined upward, the connecting rod 7 will push the lifting column 30 to move upward. If the end of the connecting rod 7 near the lifting column 30 is inclined downward, the connecting rod 7 will push the lifting column 30 to move downward. The system also includes a lifting mechanism 5 and a limiting mechanism 20.

[0034] The limiting mechanism 20 is located on the left and right sides of the bridge support 1 to limit the maximum distance between the ends of the two translation rods 6. By limiting the maximum distance, the height of the lifting platform 9 is limited. For example, when the connecting rod 7 is tilted upwards, the lifting platform 9 is located at the top and its minimum height is limited because the maximum distance between the two translation rods 6 is limited. Conversely, when the connecting rod 7 is tilted downwards, the lifting platform 9 is located at the bottom and its maximum height is limited. When the translation rod 6 disengages from the limiting mechanism 20, if the lifting platform 9 is only subjected to gravity, it will move downwards and into the electrophoresis tank 4.

[0035] The lifting mechanism 5 is located on the side wall of the electrophoresis tank 4. Since the moving platform 3 in this application moves to the right, the workpiece descends and is immersed in the interior of the electrophoresis tank 4 on the left side. The workpiece needs to rise on the right side of the electrophoresis tank 4. Therefore, the lifting mechanism 5 is located on the right side of the electrophoresis tank 4. When the moving platform 3 moves to the right side, the lifting mechanism 5 will lift the lifting platform 9 upward. During the lifting process, the translation rod 6 is located between the two limiting mechanisms 20 on the left and right. Therefore, the limiting mechanism 20 will not affect the movement of the translation rod 6. At this time, the workpiece will move upward with the lifting platform 9 and leave the electrophoresis tank 4.

[0036] In one instance of this embodiment, please refer to Figure 8 , Figure 9 and Figure 10 The moving platform 3 has a front-to-back facing clearance opening 15 in its middle. The clearance opening 15 is open on both the top and bottom, allowing the lifting column 30, connecting rod 7, and drive plate 8 to move up and down within it. A front-to-back facing support frame 16 is provided on the upper surface of the moving platform 3. The support frame 16 is a U-shaped structure with its opening facing downwards, and its length is greater than the length of the clearance opening 15. The lifting column 30 is slidably connected to the middle of the support frame 16. The drive plate 8 and connecting rod 7 are located below the support frame 16. A lifting damping assembly 13, which limits the moving speed of the lifting column 30, is provided above the support frame 16. When the translation rod 6 disengages from the limiting mechanism 20, the lifting platform 9 will descend rapidly under gravity alone. If the fixed workpiece below falls rapidly into the liquid in the electrophoresis tank 4, liquid splashing will occur. Therefore, the lifting damping assembly 13 is provided on the support frame 16 to slow down the vertical movement of the lifting column 30.

[0037] The lifting damping assembly 13 includes a cylinder 10 disposed in the middle of the upper surface of the support frame 16. The cylinder 10 is a container with an open lower end. A piston 11 is slidably connected to the inner wall of the cylinder 10. The lower surface of the piston 11 is fixedly connected to the upper end of the lifting column 30. Several vertically penetrating vent holes 12 are provided on the piston 11 rod. Therefore, when the piston 11 moves up and down with the lifting column 30, the gas above the cylinder 10 needs to pass through the vent holes 12, thereby slowing down the movement speed of the lifting column 30 and achieving the effect of gas damping. A spring can also be sleeved on the outside of the lifting column 30, which can be freely set according to the relevant buffering needs.

[0038] In one instance of this embodiment, please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6The limiting mechanism 20 includes a top rod 17 fixedly connected to the lower surface of the bridge support 1. The lower end of the top rod 17 is inclined towards the moving platform 3. A guide plate 18 facing left and right is provided on the side of the lower end of the top rod 17 near the moving platform 3. Multiple top rods 17 are connected to the bridge support 1 on one guide plate 18. The overall weight of the limiting mechanism 20 is reduced while ensuring structural strength. A guide roller 19 is provided at the end of the translation rod 6 away from the center of the moving platform 3. The guide roller 19 rolls along the side of the guide plate 18 near the moving platform 3. Therefore, the distance between the front and rear translation rods 6 can be limited by the front and rear guide plates 18. Since the workpiece needs to rise from the electrophoresis tank 4 to move to the right, the guide roller 19 needs to contact the guide plate 18 again. Therefore, an arc-shaped transition plate 29 is provided at the left end of the guide plate 18 on the right side. The left end of the arc-shaped transition plate 29 is inclined and curved away from the moving platform 3, so that the guide roller 19 can contact the guide plate 18 on the right side more smoothly when moving to the right. When the workpiece moves downward on the left side of the electrophoresis tank 4, the lifting damping component 13 is provided, so even if the guide roller 19 suddenly disengages from the guide plate 18, the lifting platform 9 will not fall. Therefore, the right end of the guide plate 18 on the left side does not need to be provided with an arc-shaped transition plate 29.

[0039] In one instance of this embodiment, please refer to Figure 3 , Figure 11 , Figure 12 and Figure 13 The lifting mechanism 5 includes a lifting drive device 26 disposed on the outer wall of the electrophoresis tank 4. The lifting drive device 26 can be a cylinder, a hydraulic cylinder, or an electric push rod, as long as it provides a stable lifting force. To increase the load, a hydraulic cylinder can be used, and the output end of the lifting drive device 26 extends upward. A Z-shaped bracket 28 is fixedly connected to the output end of the lifting drive device 26. The Z-shaped bracket 28 consists of two straight sections facing forward and backward and a vertical section in the middle. The vertical section and the lower straight section of the Z-shaped bracket 28 extend into the electrophoresis tank 4, and an arc-shaped support head 27 is provided on the upper surface of the lower straight section of the Z-shaped bracket 28. When the arc-shaped support head 27 moves upward with the Z-shaped bracket 28, the arc-shaped support head 27 will abut against the front and rear sides of the lower surface of the lifting platform 9. Since the upper surface of the arc-shaped support head 27 is arc-shaped, the lifting platform 9 can still move to the right at this time, and the friction is small. Furthermore, when the lifting platform 9 is raised to a higher position, the two guide rollers 19 are at the same height as the two guide plates 18, and the two guide rollers 19 are located between the two guide plates 18. At this time, after the moving platform 3 moves to the right, the guide rollers 19 will move to the right until they contact the two guide plates 18.

[0040] In one instance of this embodiment, please refer to Figure 4, Figure 5 , Figure 6 and Figure 7 The suspension guide rail assembly 2 includes a mounting bracket 25 disposed on the lower surface of the bridge support 1. The mounting bracket 25 is located on the side of the bridge support 1 near the moving platform 3, and the lower end of the mounting bracket 25 is fixedly connected to a downward-facing C-shaped track 24. Bearing seats 22 are disposed at the front and rear ends of the upper surface of the moving platform 3. Traveling wheel sets 23 are disposed on both the front and rear sides above the bearing seats 22. The two traveling wheel sets 23 are located inside the same C-shaped track 24, and the lower part of the traveling wheel sets 23 rolls along the lower extension of the C-shaped track 24, achieving a limiting effect in the vertical and horizontal directions. A belt disposed inside the C-shaped track 24 can drive the traveling wheel sets 23 to rotate, thereby moving the moving platform 3. Alternatively, a traction rope disposed on the bridge support 1 can directly pull the moving platform 3 to move it. The traction rope or belt is a lateral drive device in the suspension guide rail assembly 2.

[0041] In one instance of this embodiment, please refer to Figure 10 Workpiece clamping assemblies 21 are provided on both the left and right sides of the lifting platform 9. These assemblies hold the workpieces to be electrophoretically treated below the lifting platform 9. To ensure the stability of the lifting platform 9 during vertical movement, vertical auxiliary guide posts 14 are provided at the four corners of the upper surface of the lifting platform 9. The upper parts of the auxiliary guide posts 14 are slidably connected to the sides of the moving platform 3. The workpiece clamping assembly 21 includes a rotating base 32 rotatably connected to the side of the lifting platform 9. One end of a clamping arm 33 is fixedly connected to the lower end of the rotating base 32. The other end of the clamping arm 33 is rotatably connected to the upper part of an adjusting rod 31. A mounting plate 34 is fixedly connected to the lower end of the adjusting rod 31. The mounting plate 34 has through holes and is fixed to the workpiece by bolts. The angle of the clamping arm 33 can be freely adjusted, thereby changing the position of the mounting plate 34 and making the installation position of the entire workpiece clamping assembly 21 more flexible.

[0042] In this embodiment, a complete electrophoresis processing cycle includes the following steps in sequence: Step 1: Workpiece loading and initial transport Operators or automated equipment hoist the workpiece to be processed (e.g., an automotive body-in-white) to the starting position of the device. By adjusting the rotating base 32, clamping arms 33, and adjusting rods 31 of each workpiece clamping assembly 21, the mounting plate 34 is aligned with the preset lifting holes on the workpiece and secured with high-strength bolts, completing the reliable installation of the workpiece under the lifting platform 9. At this time, since the moving platform 3 is located at the starting position on the left side of the electrophoresis tank 4, the guide rollers 19 on both sides are constrained by the guide plates 18 of the limiting mechanism 20, keeping the lifting platform 9 in the highest mechanically locked position. The transverse drive device in the suspension guide rail assembly 2 is activated, and the moving platform 3, carrying the workpiece at the high position, moves smoothly to the right (towards the electrophoresis tank 4) along the track.

[0043] Step 2: Workpiece lowering and immersion When the moving stage 3 reaches the predetermined "descending position" directly above the left end of the electrophoresis tank 4, the transverse drive device stops precisely. At this moment, the guide roller 19 at the end of the translation link 7 moves exactly to the right end of the left guide plate 18. The instant the moving stage 3 stops, the lifting platform 9 and the workpiece tend to fall under gravity, and the guide roller 19 immediately disengages from the left guide plate 18. After the mechanical constraint is released, the lifting platform 9 and the workpiece begin to descend in a controlled manner. The descent motion is converted into the reverse horizontal motion at the end of the translation link 7 through the linkage mechanism. The speed of the entire descent process is strictly controlled by the lifting damping assembly 13 to avoid impact. The descent stops when the mechanical limit device "such as the limit ring" on the translation link 7 contacts, or when the lifting platform 9 reaches the designed lower stop point. At this time, the workpiece is completely immersed in the electrophoretic paint in the electrophoresis tank 4, ready for electrophoresis.

[0044] Step 3: Electrophoretic Coating During Operation Electrophoresis tank 4 is powered on, and the electrophoresis process begins. Simultaneously, the lateral drive device drives the moving stage 3 to continue moving to the right at a speed set by the process (typically relatively slow). The moving stage 3 pulls the lifting platform 9, which is at its lowest position, and the workpiece, moving horizontally synchronously in the electrophoretic paint solution. This "moving while electrophoresing" method facilitates uniform flow and exchange of the paint solution on the workpiece surface, eliminates air bubble stagnation, and thus obtains a uniform and dense coating film.

[0045] Step 4: Lifting the workpiece and dripping paint When the workpiece moves with the moving table 3 to the predetermined "rising position" at the right end of the electrophoresis tank 4, the moving table 3 stops. The lifting mechanism 5 fixed at this position then activates. The lifting drive device 26 starts, and its output end pushes upward, driving the Z-shaped bracket 28 and the arc-shaped support head 27 to rise. The arc-shaped support head 27 contacts and abuts the bottom of the lifting platform 9, providing a stable lifting force to smoothly lift the lifting platform 9 and the workpiece away from the liquid surface. When the lifting drive device 26 reaches its full stroke position, the workpiece is completely removed from the tank and raised to the paint dripping height. The system can remain at this height for a preset time, allowing excess electrophoretic paint adhering to the workpiece surface to fully flow back into the electrophoresis tank 4 under gravity, reducing paint loss and contamination.

[0046] Step 5: Mechanical relocking and disengagement from the mechanism After the paint dripping process is completed, the transverse drive device is restarted, driving the moving platform 3 to slowly move to the right "away from the electrophoresis tank 4". Since the lifting platform 9 has been raised to a high position, its guide rollers 19 are at the same height as the guide plate 18 and located in its inlet gap. During the movement, the guide rollers 19 first contact the right-side arc-shaped transition plate 29, and smoothly enter the constraint surface of the right-side guide plate 18 under its guidance. As the movement continues, the guide rollers 19 on both sides move towards each other under the constraint of the guide plate 18, slightly lifting the lifting platform 9 relative to the moving platform 3 via the connecting rod 7. This slight movement completely disengages the bottom of the lifting platform 9 from the arc-shaped support head 27. Once disengaged, the lifting mechanism 5 completes its task, the lifting drive device 26 can immediately retract and reset, and the Z-shaped bracket 28 returns to the standby position. At this time, the lifting platform 9 is completely locked back to a purely mechanical position by the limiting mechanism 20.

[0047] Step 6: Transfer to subsequent processes The moving stage 3, carrying the workpiece that has completed electrophoresis and is locked at a high position, continues to move to the right, smoothly transporting it to subsequent UF "ultrafiltration" spray cleaning, baking and curing processes. Throughout the entire transfer process, the workpiece height is maintained by the mechanical structure, requiring no external power.

[0048] This invention provides a suspended conveyor device for electrophoretic coating. Through the coordinated design of the limiting mechanism 20 and the lifting mechanism 5, the complex lifting drive and control system, which must be integrated into the moving parts in traditional solutions, is completely separated. This greatly simplifies the structure of the moving platform 3 and the layout of the accompanying lines, fundamentally eliminating the risk of failure caused by line wear and twisting. The system reliability and maintainability are significantly improved. It achieves smooth descent without power and zero-energy mechanical locking, making operation more energy-efficient. It supports horizontal movement of workpieces within the electrophoresis tank 4 for electrophoresis, optimizing coating quality and production efficiency. The workpiece clamping assembly 21 has multi-degree-of-freedom adjustment capabilities, enhancing the adaptability of the production line to different workpieces. The overall device has a simple structure, stable operation, and low maintenance costs, providing an excellent conveying solution for high-efficiency, highly flexible modern electrophoretic coating production lines.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A suspended conveying device for electrophoretic coating, comprising two parallel bridge supports, a suspension guide rail assembly mounted on the bridge supports, a movable platform that moves laterally along the length of the suspension guide rail assembly positioned below the suspension guide rail assembly, and an electrophoresis tank positioned between the two bridge supports, characterized in that... A lifting column is provided in the middle of the mobile platform, and a lifting platform is provided at the end of the lifting column near the ground. A drive plate is fixedly connected to the middle of the lifting column, and connecting rods are rotatably connected to both ends of the drive plate. A translation rod that is slidably connected to the lifting platform is rotatably connected to the end of the connecting rod away from the drive plate. The two translation rods move synchronously in opposite directions. The platform also includes a lifting mechanism and a limiting mechanism. A limiting mechanism is provided on both sides of the bridge support to limit the maximum distance between the ends of the two translation rods; A lifting mechanism, located on the side wall of the electrophoresis tank, is used to lift the lifting platform upwards; When the two translation rods disengage from the limiting mechanism and the lifting platform is only subjected to gravity, the lifting platform descends into the electrophoresis tank.

2. The suspended conveyor device for electrophoretic coating according to claim 1, characterized in that, The lifting platform has a clearance opening in the middle that extends through its thickness. A support frame is provided on the side of the lifting platform away from the ground. A lifting column is slidably connected to the middle of the support frame. A lifting damping component is provided on the support frame to limit the moving speed of the lifting column.

3. The suspended conveyor device for electrophoretic coating according to claim 2, characterized in that, The lifting damping assembly includes a cylinder fixed to the support frame, a piston slidably connected to the cylinder and fixedly connected to the lifting column, and a vent hole on the piston.

4. The suspended conveyor device for electrophoretic coating according to claim 1, characterized in that, The limiting mechanism includes a top rod fixed to the bridge bracket, the end of the top rod being connected to a guide plate, the surface of the guide plate being parallel to the movement trajectory of the moving platform, and a guide roller being provided at the end of the translation rod away from the center of the moving platform, the guide roller making rolling contact with the surface of the guide plate.

5. The suspended conveyor device for electrophoretic coating according to claim 4, characterized in that, An arc-shaped transition plate is fixedly connected to the side of the guide plate near the center of the electrophoresis tank. The arc-shaped transition plate extends obliquely from the main body of the guide plate in a direction away from the electrophoresis tank.

6. The suspended conveyor device for electrophoretic coating according to claim 5, characterized in that, The lifting mechanism includes a lifting drive device fixedly installed on the outer wall of the electrophoresis tank. The output end of the lifting drive device is connected to a Z-shaped bracket. The vertical section of the Z-shaped bracket extends into the interior of the electrophoresis tank. The end of the Z-shaped bracket is provided with an arc-shaped support head that cooperates with the bottom of the lifting platform. When the lifting drive device is fully extended, the lifting platform is lifted to a high position. At this time, the two guide rollers are respectively located between the two arc-shaped transition plates.

7. The suspended conveyor device for electrophoretic coating according to claim 1, characterized in that, The suspension guide rail assembly includes a mounting frame fixed to the bridge bracket. A C-shaped rail is installed at the bottom of the mounting frame. Bearing seats are provided at both ends of the moving platform. A set of traveling wheels that roll in cooperation with the C-shaped rail are installed on the bearing seats.

8. The suspended conveyor device for electrophoretic coating according to claim 1, characterized in that, The lifting platform is provided with a workpiece clamping assembly on its side, and an auxiliary guide column that is slidably connected to the moving platform is also provided on the upper surface of the lifting platform.

9. A suspended conveyor device for electrophoretic coating according to claim 8, characterized in that, The workpiece clamping assembly includes a rotating base rotatably connected to the side of the lifting platform, a clamping arm fixedly connected to the rotating base, an adjusting rod rotatably connected to the end of the clamping arm, and a mounting plate provided at the end of the adjusting rod.

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