Intelligent and automatic conveying system for pretreatment and electrophoresis in new energy vehicle coating workshop

Abstract

The present application relates to the field of electric vehicle manufacturing and conveying, and particularly relates to an intelligent automatic conveying system for pretreatment electrophoresis in a new energy vehicle coating workshop, comprising an electrophoresis pool body and a conveying unit above the electrophoresis pool body, wherein the conveying unit comprises a conveying frame, a main positioning seat and an auxiliary positioning seat are arranged on the crossbeam of the conveying frame at intervals, and a rotationally assembled auxiliary positioning member is symmetrically arranged between the main positioning seat and the auxiliary positioning seat and can be clamped into the bottom of the skid frame to achieve lower limiting; in the present application, the conveying unit and the electrophoresis pool body are used in cooperation to realize automatic conveying, overturning, immersion coating and liquid draining of the vehicle body, the positioning assembly is combined with the main and auxiliary positioning seats, the auxiliary positioning member, and the import and export top pressing and pullback assembly linkage to form a locking mechanism upon reaching the position, effectively reducing the movement of the skid frame, improving the conveying stability, and ensuring the stability of the vehicle body electrophoresis.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle manufacturing and conveying technology, and in particular to an intelligent automated conveying system for pretreatment electrophoresis in new energy vehicle painting workshops. Background Technology

[0002] The intelligent automated conveying system for pretreatment electrophoresis in the new energy vehicle painting workshop uses dedicated conveying machinery, servo drives, sensor detection, PLC / industrial bus and host computer software to realize automatic conveying, precise positioning, attitude control, flexible scheduling, full traceability and fault self-diagnosis of the vehicle body from the line → pretreatment tanks → electrophoresis tank → post-electrophoresis water washing → before drying.

[0003] Most systems on the market rely solely on a single upper pin or lower slot for limiting movement, lacking the ability to synchronously lock in both directions. When the lightweight car body is tilted into the tank along with the skid, it will instantly be subjected to enormous buoyancy of the electrophoretic fluid, the impact of the circulating fluid flow, and the inertial torque of the tilt. Single-point or unidirectional constraints are simply insufficient to suppress the displacement tendency of the skid in multiple degrees of freedom, easily leading to phenomena such as the skid moving back and forth or shifting left and right. Furthermore, in the electrophoretic pool, when the car body is subjected to buoyancy and the impact of the circulating fluid flow, relying solely on lower locking will cause the skid to produce a slight angular displacement around the locking point, causing the car body to tilt, which in turn results in the electrophoretic film being thinner on one side and thicker on the other. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intelligent automated conveying system for pretreatment electrophoresis in new energy vehicle painting workshops.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A pretreatment electrophoresis intelligent automated conveying system for new energy vehicle painting workshops includes an electrophoresis pool and a conveying unit above the electrophoresis pool. The conveying unit includes a conveying frame with a main positioning seat and an auxiliary positioning seat spaced apart on its crossbeam. A rotatably assembled auxiliary positioning component is symmetrically arranged between the main positioning seat and the auxiliary positioning seat. It can be locked into the bottom of the skid frame to achieve a lower limit position. A positioning component is horizontally slidably installed inside the conveying frame, including a main connecting rod, a slide rod slidably set in the conveying frame and fixedly connected to the main connecting rod, a vertically fixedly installed upright above the main connecting rod, and a positioning insert rod horizontally installed at the top of the upright. The positioning insert rod is pressed against the top of the skid frame and inserted into the auxiliary positioning seat to achieve an upper limit position. A rack body that can mesh with the gear on the auxiliary positioning component is fixedly installed on the slide rod. When the positioning component slides, it is driven by the rack and pinion to make the upper positioning rod and the lower auxiliary positioning component work together to complete the locking and positioning of the skid frame. The electric pool body has an inlet end for the skid frame to enter and an outlet end for it to exit. A pressing component is provided on one side of the inlet end and a pull-back component is provided on one side of the outlet end. The pressing component is used to push the positioning component to move in the locking direction, and the pull-back component is used to pull the positioning component to move in the unlocking direction. The conveyor frame is also provided with a first elastic limiter and a second elastic limiter to limit the rotation of the gear in the non-drive state.

[0006] Preferably, the auxiliary positioning component includes a positioning ring, a gear is connected to the lower part of the positioning ring via an auxiliary connecting rod arranged vertically downwards, a fixing rod is vertically installed on the positioning ring, and locking protrusions are symmetrically installed on both sides of the upper part of the outer wall of the fixing rod.

[0007] Preferably, the bottom of the skid frame is provided with a slot for inserting auxiliary positioning components, and the skid frame is provided with a sliding groove for inserting a locking protrusion.

[0008] Preferably, both the top-pressing assembly and the pull-back assembly include a support fixedly installed with the electric pool body. A cavity is opened in the support, and an electric telescopic rod is horizontally placed in the cavity. The top end of the electric telescopic rod faces the electric pool body and is fixedly installed with an auxiliary slider. An L-shaped connecting block is fixedly installed at the bottom of the auxiliary slider, and an auxiliary rod is vertically installed downward on the side of the bottom of the L-shaped connecting block away from the electric telescopic rod.

[0009] Preferably, an extension rod is horizontally installed in the middle of the side of the main connecting rod away from the slide rod. A sealing plug is installed on one side of the extension rod extending out of the conveyor frame, and a guide block is installed on the side of the sealing plug. The top of the guide block is provided with an inlet slide groove, an outlet slide groove, and a transition groove connecting the inlet slide groove and the outlet slide groove. The inlet slide groove is used to receive the auxiliary rod of the top pressing component located at the inlet end when the conveyor frame moves towards the electric pool body, so as to drive the positioning component to slide towards the locking position. The outlet slide groove is used to receive the auxiliary rod of the pull-back component located at the outlet end when the conveyor frame moves away from the electric pool body, so as to drive the positioning component to slide towards the unlocking position. The transition groove allows the auxiliary rod to switch paths between the inlet slide groove and the outlet slide groove.

[0010] Preferably, a first sliding groove is provided in the frame of the conveyor frame corresponding to the main connecting rod, a second sliding groove is provided in the frame of the conveyor frame at the sliding rod, and a third sliding groove is provided in the frame of the conveyor frame corresponding to the rack body. Teeth are installed on both sides of the rack body, and the number of teeth is less than the number of teeth of the gear. The bottom end of the gear is provided with an inwardly inclined guide slope.

[0011] Preferably, when the rack body meshes with the gear and is driven, the gear can overcome the resistance of the first elastic limiting member and the second elastic limiting member to rotate. When the rack body disengages from the gear, the first elastic limiting member and the second elastic limiting member can prevent the gear from continuing to rotate due to inertia.

[0012] Preferably, a cavity is provided in the conveyor frame corresponding to the gear, and an arc-shaped extension seat is provided at the bottom of the cavity. The side wall of the arc-shaped extension seat is provided with an inclined surface. The first elastic limiting member is vertically installed on the arc-shaped extension seat at intervals, and the second elastic limiting member is arranged at intervals on the inclined surface of the arc-shaped extension seat. The first elastic limiting member includes a first mounting base and a first elastic arc block fixedly installed on one side of the first mounting base, and the second elastic limiting member includes a second mounting base and a second elastic arc block fixedly installed on one side of the second mounting base.

[0013] The beneficial effects of this invention are as follows: In this invention, the conveying unit and the electrophoresis pool body work together to realize automatic conveying, flipping, immersion coating and draining of the car body. The positioning component is linked with the main and auxiliary positioning seats, auxiliary positioning parts and the inlet and outlet top pressing and pull-back components to form a locking mechanism when in place. When entering the pool, the top pressing component drives the positioning component by the conveying action, and simultaneously completes the upper insertion rod pressing and the lower locking protrusion rotation locking, forming a two-way mechanical lock. When exiting the pool, the pull-back component automatically unlocks in the opposite direction, which effectively reduces the movement of the skid frame, improves the conveying stability and ensures the stability of the car body electrophoresis. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the intelligent automated conveying system for pretreatment electrophoresis in the painting workshop of new energy vehicles proposed in this invention; Figure 2 This is a structural diagram of the conveyor frame, positioning assembly, main positioning seat, auxiliary positioning seat, and auxiliary positioning component; Figure 3 This is a structural diagram of the positioning component; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a partial cross-sectional structural diagram of the conveyor frame; Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 A partial sectional view of the conveyor frame, positioning assembly, main positioning seat, auxiliary positioning seat, and auxiliary positioning component. Figure 8 for Figure 7 Enlarged structural diagram at point C; Figure 9 This is a structural schematic diagram of the first elastic limiting member, the second elastic limiting member, and the arc-shaped extension seat; Figure 10 This is a partial cross-sectional structural diagram of the top pressure assembly; Figure 11 This is a schematic diagram of a partial cross-section of the skid frame; Figure 12 for Figure 11 Enlarged structural diagram at point D.

[0015] In the diagram: 1. Electric pool body; 2. Conveyor frame; 21. Main positioning seat; 22. Auxiliary positioning seat; 3. Drive unit; 4. Skid frame; 41. Slot; 42. Sliding groove; 501. Top pressure assembly; 502. Pull-back assembly; 51. Support; 52. Electric telescopic rod; 53. Auxiliary slider; 54. L-shaped connecting block; 55. Auxiliary rod; 6. Positioning assembly; 61. Main connecting rod; 62. Vertical rod; 621. Positioning insert rod; 63. Slide rod; 64. Rack body; 65. Extension rod; 66. Sealing plug; 67. Guide auxiliary block; 671. Inlet slide groove; 672. Transition groove; 673. Outlet slide groove; 7. Auxiliary positioning component; 71. Positioning ring; 72. Fixing rod; 721. Locking protrusion; 73. Gear; 8. First elastic limiting component; 9. Arc-shaped extension seat; 91. Second elastic limiting component; 10. Elastic limiting ring. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Reference Figure 1-12 The intelligent automated conveying system for pretreatment electrophoresis in the painting workshop of new energy vehicles includes an electrophoresis pool body 1 and a conveying unit above it. The conveying unit includes a conveying frame 2 that can be moved and flipped as a whole by a drive unit 3. A main positioning seat 21 and an auxiliary positioning seat 22 are spaced apart on its crossbeam. A rotating auxiliary positioning component 7 is symmetrically arranged between the main positioning seat 21 and the auxiliary positioning seat 22. It can be locked into the bottom of the skid frame 4 to achieve the lower limit. This structure can reliably support the skid frame 4 from the bottom, initially limit the vertical displacement, and make the positioning foundation stable.

[0018] A positioning assembly 6 is horizontally slidably installed inside the conveyor frame 2. This assembly includes a main connecting rod 61, a slide rod 63 slidably disposed within the conveyor frame 2 and fixedly connected to the main connecting rod 61, a vertically fixed upright rod 62 above the main connecting rod 61, and a positioning insert 621 horizontally installed at the top of the upright rod 62. The positioning insert 621 presses against the upper part of the skid frame 4 and inserts into the auxiliary positioning seat 22 to achieve an upper limit position. This bidirectional limiting action prevents the skid frame 4 from vertically shifting, significantly improving positioning stability. A rack body 64 is fixedly installed on the slide rod 63, capable of meshing with the gear 73 on the auxiliary positioning component 7.

[0019] The drive unit 3 is mounted on the equipment frame on both sides of the electric pool body 1. It is used to drive the conveyor frame 2 to complete horizontal reciprocating movement and overall flipping action. It includes four parts: walking drive mechanism, flipping drive mechanism, bearing frame, and guide limit mechanism.

[0020] The support frame is fixedly installed on the top surface of both sides of the electrophoresis pool body. It is constructed from a corrosion-resistant steel frame welded together and extends along the length of the pool body. Two parallel travel tracks are symmetrically laid on the top of the support frame, with a reserved space between them for the installation of the travel drive components. Protective baffles are also installed inside the frame to prevent electrophoresis liquid, water vapor, and paint mist from intruding into the internal transmission structure. The travel drive mechanism includes a travel drive motor, a reducer, active travel wheel sets, driven travel wheel sets, and a drive shaft. The travel drive motor and reducer are fixed to the end of the support frame. The output end of the reducer is connected to the horizontally arranged drive shaft, with one set of active travel wheels mounted at each end of the drive shaft. Two sets of driven travel wheels are correspondingly installed at the bottom of each end of the conveyor frame. Both the active and driven travel wheel sets are engaged on the travel tracks. After being reduced in speed and torque by the reducer, the travel drive motor drives the drive shaft to rotate synchronously, driving the active travel wheels to roll along the travel tracks. This, in turn, causes the entire conveyor frame to move horizontally back and forth along the length of the electrophoresis pool body 1, completing the conveying action of the skid frame 4 and the workpiece entering and exiting the electrophoresis pool body 1.

[0021] The tilting drive mechanism is symmetrically arranged on the left and right sides of the conveyor frame 2. Each set includes a tilting servo motor, a reducer, a tilting shaft, a connecting flange, and a support base. The support base is fixedly installed on the carrier frame and located at the corresponding position at the end of the conveyor frame. The tilting shaft is rotatably mounted in the support base through bearings. One end of the shaft is rigidly connected to the end of the conveyor frame 2 through the connecting flange, and the other end is connected to the output end of the reducer. The input end of the reducer is connected to the tilting servo motor. The tilting servo motor and the reducer are fixed to the support base or the carrier frame. The two tilting servo motors adopt a synchronous control mode. During operation, the two tilting servo motors output power synchronously, which changes the transmission direction and amplifies the torque through the reducer, driving the tilting shaft to rotate within the support base, thereby driving the conveyor frame to tilt as a whole around the tilting shaft.

[0022] The guiding and limiting mechanism includes side guide wheels, end limit blocks, and buffer pads. Multiple sets of side guide wheels are vertically installed on both sides of the conveyor frame 2. The wheel surfaces of the side guide wheels are in close contact with the sides of the travel track, limiting the left and right deviation of the conveyor frame during horizontal movement. End limit blocks are fixed at both ends of the track of the supporting frame. Buffer pads are pasted on the inner side of the limit blocks, which can limit the travel limit of the conveyor frame, while buffering impacts and reducing operating noise.

[0023] When the positioning component 6 slides, it is driven by the rack body 64 and the gear 73, so that the upper positioning rod 621 and the lower auxiliary positioning component 7 work together to complete the locking and positioning of the skid frame 4. The linkage transmission structure is adopted, and a single power can complete the upper and lower positioning actions synchronously. The action synchronization is strong and the drive structure is simplified.

[0024] The electric pool body 1 has an inlet end for the skid to enter and an outlet end for the skid to exit. A pressing assembly 501 is provided on one side of the inlet end, and a pull-back assembly 502 is provided on one side of the outlet end. The pressing assembly 501 pushes the positioning assembly 6 to move in the locking direction, and the pull-back assembly 502 pulls the positioning assembly 6 to move in the unlocking direction. With pressing and pull-back assemblies at both ends, locking and unlocking can be automatically completed at the workstation, adapting to continuous production line operations. The conveyor frame 2 also has a first elastic limiter 8 and a second elastic limiter 91 to limit the rotation of the gear 73 in a non-drive state, effectively preventing the gear 73 from rotating or shifting when unloaded.

[0025] The auxiliary positioning component 7 includes a positioning ring 71. A gear 73 is connected to the lower part of the positioning ring 71 via a vertically downward-mounted auxiliary connecting rod. A fixing rod 72 is vertically mounted on the positioning ring 71, and locking protrusions 721 are symmetrically mounted on both sides of the upper part of the outer wall of the fixing rod 72. The integrated transmission layout allows the gear 73 to rotate synchronously with the positioning structure, resulting in a short transmission path and low power loss. The symmetrically arranged locking protrusions 721 can improve the uniformity of the locking force.

[0026] The bottom of the skid frame 4 has a slot 41 for inserting the auxiliary positioning component 7, and the skid frame 4 has a sliding groove 42 for the rotatable insertion of the locking protrusion 721. The slot, sliding groove and locking protrusion 721 fit precisely together, the rotatable locking structure is easy to install and remove, and can resist the fluid impact in the electrophoresis process, with excellent anti-loosening effect.

[0027] Both the top-pressing assembly 501 and the pull-back assembly 502 include a support 51 that is fixedly installed with the electric pool body 1. A cavity is opened in the support 51, and an electric telescopic rod 52 is horizontally placed in the cavity. The top extension end of the electric telescopic rod 52 faces the electric pool body 1 and is fixedly installed with an auxiliary slider 53. An L-shaped connecting block 54 is fixedly installed at the bottom of the auxiliary slider 53, and an auxiliary rod 55 is vertically installed downward on the side of the bottom of the L-shaped connecting block 54 away from the electric telescopic rod 52. The initial state of the top-pressing assembly 501 is that the electric telescopic rod 52 is in the retracted limit position. When the conveyor frame 2 reaches the inlet end, the electric telescopic rod 52 of the top-pressing assembly 501 extends and pushes the guide block 67 through the auxiliary rod 55, causing the positioning assembly 6 to slide to the locking position. Then the telescopic rod retracts and starts timing. After the timing ends, it remains in the retracted initial state. The initial state of the pull-back assembly 502 is that the electric telescopic rod 52 is in the extended limit position. When the conveyor frame 2 reaches the outlet end, the electric telescopic rod 52 of the pull-back assembly 502 retracts and pulls the guide block 67 through the auxiliary rod 55, causing the positioning assembly 6 to slide to the unlocked position. Then the telescopic rod extends to reset and starts timing. After the timing ends, it remains in the extended initial state.

[0028] An extension rod 65 is horizontally mounted on the middle of the side of the main connecting rod 61 away from the slide rod 63. A sealing plug 66 is installed on one side of the extension rod 65 extending out of the conveyor frame 2, and a guide block 67 is installed on one side of the sealing plug 66. The top of the guide block 67 is provided with an inlet slide groove 671, an outlet slide groove 673, and a transition groove 672 connecting the inlet slide groove 671 and the outlet slide groove 673. The inlet slide groove 671, facing the electric pool body 1, is used to receive the auxiliary rod 55 of the top pressing assembly 501 located at the inlet end when the conveyor frame 2 moves towards the electric pool body 1, so as to drive the positioning assembly 6 to slide towards the locking position. The outlet slide groove 673 is used to receive the auxiliary rod 55 of the pull-back assembly 502 located at the outlet end when the conveyor frame 2 moves away from the electric pool body 1, so as to drive the positioning assembly 6 to slide towards the unlocking position. The transition groove 672 provides a path for the auxiliary rod 55 to switch between the inlet slide groove 671 and the outlet slide groove 673. The multi-segment chute forms a complete guide trajectory, which can accurately guide the auxiliary rod to complete the power docking. No manual intervention is required throughout the process. When paired with the sealing plug 66, it can seal the gaps in the conveyor frame and prevent the electrophoretic medium from intruding into the internal transmission structure.

[0029] The conveyor frame 2 has a first groove corresponding to the main connecting rod 61, a second groove corresponding to the sliding rod 63, and a third groove corresponding to the rack body 64. These independent grooves in different areas allow for individual positioning and guidance of each moving component, preventing motion interference and reducing sliding friction resistance. The rack body 64 has teeth on both sides, with the number of teeth being less than the number of teeth on the gear 73. The bottom outer side of the gear 73 has an inwardly inclined guide slope. This limited number of teeth on one side controls the rotation angle of the gear 73, precisely limiting the opening and closing range of the auxiliary positioning component 7.

[0030] When the rack body 64 meshes with the gear 73 and drives it, the gear 73 can overcome the resistance of the first elastic limiting member 8 and the second elastic limiting member 91 to rotate. When the rack body 64 disengages from the gear 73, the first elastic limiting member 8 and the second elastic limiting member 91 can prevent the gear 73 from continuing to rotate due to inertia. The elastic limiting forms rigid damping, which does not affect normal transmission in the driving state. After disengagement, the gear 73 is quickly braked to prevent positioning offset caused by inertial rotation and ensure consistent positioning accuracy every time.

[0031] A cavity is formed inside the conveyor frame 2 corresponding to gear 73. An arc-shaped extension seat 9 is located at the bottom of the cavity, and the side wall of the arc-shaped extension seat 9 has an inclined surface. First elastic limiting members 8 are vertically mounted on the arc-shaped extension seat 9 at intervals, and second elastic limiting members 91 are spaced apart on the inclined surface of the arc-shaped extension seat 9. The first elastic limiting member 8 includes a first mounting base and a first elastic arc block fixed thereon, and the second elastic limiting member 91 includes a second mounting base and a second elastic arc block fixed thereon. The arc-shaped extension seat 9 conforms to the operating trajectory of gear 73, and the two sets of vertical and inclined elastic limiting members form multi-angle constraints, resulting in more balanced limiting forces.

[0032] Furthermore, a fourth sliding groove is provided inside the conveyor frame 2 at the position corresponding to the extension rod 65, and an elastic limiting ring 10 is fixedly provided on one side wall of the conveyor frame 2 at the outside of the fourth sliding groove. The elastic limiting ring 10 is used to limit the sealing plug 66 when the positioning component 6 is in the locked position to ensure stability.

[0033] In this invention, the pre-processed car body shell is loaded onto the skid frame 4 and fixed at the upper workstation. At this time, the bottom of the skid frame is open, waiting to dock with the conveyor frame. Driven by the walking drive mechanism, the conveyor frame 2 moves to the inlet end of the electric pool body and is in a horizontal state, ready to receive the skid frame. The skid frame 4 descends, so that the slot 41 at the bottom of the skid frame aligns with the auxiliary positioning part 7 on the conveyor frame and is inserted. At the same time, the bottom crossbeam of the skid frame presses against the main positioning seat 21, completing the initial lower limit and restricting its deviation.

[0034] After the conveyor frame stops at the inlet end, the electric telescopic rod of the top pressing assembly 501 extends from its initial retracted state, driving the auxiliary rod 55 to move downwards. The auxiliary rod 55 pushes the auxiliary rod to move towards one side of the electric pool body 1, pushing the entire guide block 67, extension rod 65, and positioning assembly 6 to slide horizontally in the locking direction. During this process, the upright rod 62 drives the positioning insert rod 621 to move horizontally, pressing it against the top of the skid frame 4, and finally inserting it into the hole of the auxiliary positioning seat 22, forming an upper limit position to prevent the skid frame from moving upwards.

[0035] Simultaneously, the rack body 64 on the slide rod 63 drives the gear 73 to rotate, overcoming the resistance of the elastic limiting component. The gear 73, through the auxiliary connecting rod, drives the fixed rod 72 and the locking protrusion 721 to rotate at an angle within the sliding groove 42 of the skid frame, causing the locking protrusion 721 to engage with the edge of the groove, forming a secure lower limit. With the upper and lower limits completed synchronously, the skid frame is completely locked. The electric telescopic rod of the top-pressing assembly retracts and starts timing; after timing ends, it remains in the retracted initial position, preparing for the next cycle. At this point, the conveyor frame and the skid frame form a stable whole.

[0036] Then, the walking drive motor is started, and the drive wheel set is driven by the transmission shaft to roll on the walking track, which drives the entire conveyor frame, the locked skid frame, and the body to move smoothly from the inlet end to the center of the pool along the length of the pool body.

[0037] Once the conveyor frame reaches the predetermined position above the electrophoresis pool, the two tilting servo motors on both sides start synchronously. After torque amplification via a reducer, the tilting shaft rotates within the support seat on the carrier frame, causing the entire conveyor frame to tilt around the tilting shaft. The car body, along with the conveyor frame, enters the electrophoresis solution at a certain angle, completing immersion. During electrophoresis, to obtain a uniform coating, the tilting mechanism may oscillate slightly or remain at a specific angle to ensure no air bubbles remain inside the car body and that the electrophoretic paint adheres fully. After the electrophoresis time is completed, the tilting mechanism reverses its movement, lifting the car body out of the liquid and returning it to its tilted position for draining, allowing excess electrophoretic paint to flow back into the pool.

[0038] After the liquid is drained, the walking drive mechanism works again, moving the conveyor frame and the vehicle body out of the electric pool body and to the outlet position. When the conveyor frame reaches the outlet position, the auxiliary rod 55 of its pull-back assembly 502 engages with the slide groove 673 of the guide block 67 and aligns with its transition groove 672. The pull-back assembly 502 at the outlet end is activated, and its electric telescopic rod retracts from the initial extended state, driving the auxiliary rod 55 to move away from the side of the electric pool body 1.

[0039] When the electric telescopic rod retracts, its auxiliary rod 55 moves along the transition rod towards the exit groove 673 and aligns with it. The electric telescopic rod then continues to retract until it reaches its limit, pulling the entire positioning assembly 6 towards the unlocking direction. At this time, the positioning insert 621 is pulled out of the auxiliary positioning seat 22 and moved away from the top of the skid frame. The rack body 64 drives the gear 73 in the opposite direction, causing the locking protrusion 721 to rotate back to its initial angle, disengaging from the sliding groove 42 and aligning with its slot 41. The unlocked conveyor then delivers the car body and skid frame to the exit unloading station. An external lifting device lifts the skid frame along with the electrophoretically coated car body, allowing it to proceed to the subsequent baking process.

[0040] After unlocking, the skid and conveyor frame maintain only the initial support relationship. The electric telescopic rod of the pull-back assembly extends to its original position and starts timing, remaining in the initial extended position after completion. At this point, there is no locking movement interference between the conveyor frame and the unlocked skid frame during movement.

[0041] The empty conveyor 2 remains horizontal and is driven by the walking drive mechanism to quickly return from the return line or along the original path to the loading position at the inlet end of the electric pool body, ready to load the next skid and start a new work cycle.

[0042] In this invention, the conveying unit works in conjunction with the electric pool body 1 to achieve automatic conveying, flipping, dipping, and draining of the vehicle body. Simultaneously, the positioning component 6 is linked with the main positioning seat 21, auxiliary positioning seat 22, auxiliary positioning component 7, inlet and outlet pressure component 501, and pull-back component 502 to construct a positioning mechanism that locks upon movement and triggers upon reaching the desired position. When entering the pool, the pressure component 501 uses the conveying action to drive the positioning component, simultaneously completing the pressing of the upper positioning rod 621 and the rotating locking of the lower locking protrusion 721, forming a two-way mechanical lock. When exiting the pool, the pull-back component 502 drives in the opposite direction to automatically unlock, requiring no additional power source, reducing the risk of movement of the skid frame 4 during conveying and flipping, and improving the stability of the vehicle body during conveying.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pretreatment electrophoresis intelligent automated conveying system for new energy vehicle painting workshops, comprising an electrophoresis pool body (1) and a conveying unit above it, characterized in that, The conveying unit includes a conveying frame (2) that can be moved and flipped as a whole by a drive unit (3). A positioning component (6) is slidably installed on the conveying frame (2). The positioning component (6) is connected to an extension rod (65) that extends out of the conveying frame (2). A sealing plug (66) and a guide block (67) are fixed to the end of the extension rod (65) in sequence. The top of the guide block (67) is provided with an inlet groove (671), an outlet groove (673), and a transition groove (672) connecting the two. A top pressure component (501) is fixedly provided on the outside of the inlet end of the electric pool body (1), and a pull-back component (502) is fixedly provided on the outside of the outlet end. Both the top pressure component (501) and the pull-back component (502) have auxiliary rods (55), and the auxiliary rods (55) of the pull-back component (502) can extend into the inlet groove (671) or the outlet groove (673). When the conveyor (2) moves toward the electric pool body (1), the auxiliary rod (55) of the top pressing assembly (501) enters the inlet slide groove (671) and pushes the positioning assembly (6) to slide in the locking direction, so that the upper positioning rod (621) of the positioning assembly (6) presses against the top of the skid frame (4) and at the same time drives the auxiliary positioning component (7) to rotate and lock into the bottom of the skid frame (4) via the rack body (64); when the conveyor (2) moves away from the electric pool body (1), the auxiliary rod (55) of the pull-back assembly (502) enters the outlet slide groove (673) and pulls the positioning assembly (6) to slide in the unlocking direction, so that the upper and lower positioning are released at the same time.

2. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 1, characterized in that, The auxiliary positioning component (7) includes a positioning ring (71), a gear (73) is connected to the lower part of the positioning ring (71) by an auxiliary connecting rod set vertically downward, a fixing rod (72) is vertically installed on the positioning ring (71), and locking protrusions (721) are symmetrically installed on both sides of the upper part of the outer wall of the fixing rod (72).

3. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 2, characterized in that, The bottom of the skid frame (4) is provided with a slot (41) for inserting the auxiliary positioning component (7), and the skid frame (4) is provided with a sliding groove (42) for inserting the card protrusion (721) in rotation.

4. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 1, characterized in that, Both the top pressure assembly (501) and the pull-back assembly (502) include a support (51) fixedly installed with the electric pool body (1). A cavity is provided in the support (51), and an electric telescopic rod (52) is placed horizontally in the cavity. The top extension end of the electric telescopic rod (52) faces the electric pool body (1) and is fixedly installed with an auxiliary slider (53). An L-shaped connecting block (54) is fixedly installed at the bottom of the auxiliary slider (53), and an auxiliary rod (55) is vertically installed downward on the side of the bottom of the L-shaped connecting block (54) away from the electric telescopic rod (52).

5. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 4, characterized in that, The inlet chute (671) faces the electric pool body (1) and is used to receive the auxiliary rod (55) of the top pressing assembly (501) located at the inlet end when the conveyor frame (2) moves toward the electric pool body (1) so as to drive the positioning assembly (6) to slide toward the locking position. The outlet chute (673) is used to receive the auxiliary rod (55) of the pull-back assembly (502) located at the outlet end when the conveyor frame (2) moves away from the electric pool body (1) so as to drive the positioning assembly (6) to slide toward the unlocking position. The transition groove (672) allows the auxiliary rod (55) to switch paths between the inlet chute (671) and the outlet chute (673).

6. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 1, characterized in that, The frame of the conveyor (2) has a first groove corresponding to the main connecting rod (61), a second groove corresponding to the slide rod (63) and a third groove corresponding to the rack body (64). The rack body (64) has teeth on both sides, and the number of teeth is less than the number of teeth of the gear (73). The bottom of the gear (73) has an inwardly inclined guide slope.

7. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 6, characterized in that, When the rack body (64) meshes with the gear (73) and drives it, the gear (73) can overcome the resistance of the first elastic limiting member (8) and the second elastic limiting member (91) and rotate. When the rack body (64) disengages from the gear (73), the first elastic limiting member (8) and the second elastic limiting member (91) can prevent the gear (73) from continuing to rotate due to inertia.

8. The intelligent automated conveying system for pretreatment electrophoresis in a new energy vehicle painting workshop according to claim 7, characterized in that, The conveyor frame (2) has a cavity corresponding to the gear (73). An arc-shaped extension seat (9) is provided at the bottom of the cavity, and the side wall of the arc-shaped extension seat (9) is provided with an inclined surface. A first elastic limiting member (8) is vertically installed on the arc-shaped extension seat (9) at intervals. A second elastic limiting member (91) is provided on the inclined surface of the arc-shaped extension seat (9) at intervals. The first elastic limiting member (8) includes a first mounting base and a first elastic arc block fixedly installed on one side of the first mounting base. The second elastic limiting member (91) includes a second mounting base and a second elastic arc block fixedly installed on one side of the second mounting base. The first elastic limiting member (8) and the second elastic limiting member (91) are used to limit the rotation of the gear (73) in the non-drive state.

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