A hanging conveying device for coating sheet metal parts

Abstract

The present application relates to the technical field of conveying device, and specifically discloses a kind of for sheet metal part coating's suspension conveying device, comprising: circulation conveying mechanism, feeding conveyor, transition bin being arranged at the end of feeding conveyor, and take and hang mechanism being arranged between circulation conveying mechanism and transition bin;The take and hang mechanism includes support table, rotary disc being rotatably arranged at the top of support table, drive assembly for driving rotary disc rotation, lower pressing mechanism being arranged at the top of support table, and supporting structure being arranged at the top of support table, the top of rotary disc is provided with a plurality of support frames, a plurality of guide rods are arranged between the top of support frame and support table, a plurality of lifting flaps are slidably arranged along the axial direction between the plurality of guide rods, and suction mechanism is arranged on the lifting flap.The present application realizes the automatic take and hang connection from feeding conveyor to circulation conveying line, improves the degree of automation and operating efficiency of production line.

Description

Technical Field

[0001] This invention relates to the field of conveying device technology, and more specifically to a suspended conveying device for painting sheet metal parts. Background Technology

[0002] In sheet metal painting production lines, workpieces undergo multiple processes such as pretreatment, spraying, and curing. Overhead conveyor chains, as a continuous conveying method, are widely used in the painting industry. Workpieces are suspended on the conveyor chain by hangers and sequentially pass through each process section to complete the painting operation. The transfer of sheet metal parts from the loading conveyor to the hangers on the overhead conveyor chain is the first connecting process in the painting production line, directly affecting the overall production cycle and painting quality.

[0003] Currently, the transfer of sheet metal parts from the loading conveyor to the hanging fixtures on the overhead conveyor chain is mostly done manually. Operators remove the sheet metal parts from the loading conveyor and then hang them one by one on the corresponding fixtures on the overhead conveyor chain. However, sheet metal parts usually have a large surface area and a certain weight, making manual handling labor-intensive and inefficient. Furthermore, the pace of manual operation is difficult to match with the continuous operating speed of the overhead conveyor chain, which can easily lead to missed hangings or empty fixtures, affecting the continuity and capacity of the painting production line. Some automation solutions use robots for handling, but the equipment investment is large and the cost is high. Moreover, when changing production of multiple types of sheet metal parts, re-teaching and reprogramming are required, resulting in insufficient flexibility. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, the present invention provides a suspended conveying device for painting sheet metal parts, which can solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions: A suspended conveyor for painting sheet metal parts, comprising: A circulating conveying mechanism, a feeding conveyor, a transition bin located at the end of the feeding conveyor, and a hook-and-unhook mechanism located between the circulating conveying mechanism and the transition bin; The hooking mechanism includes a support platform, a turntable rotatably mounted on the top of the support platform, a drive assembly for driving the turntable to rotate, a pressing mechanism mounted on the top of the support platform, and a supporting structure mounted on the top of the support platform. The top of the turntable is provided with multiple support frames, and multiple guide rods are provided through between the top of the support frames and the support platform. A lifting baffle is slidably mounted through the multiple guide rods along the axial direction. An adsorption mechanism is provided on the lifting baffle, and multiple first springs are provided between the bottom of the horizontal part of the lifting baffle and the support frame. The circulating conveyor is used to continuously convey workpieces; the feeding conveyor is used to transport workpieces to the transition bin; the transition bin is used to temporarily store and position workpieces; and the picking and hanging mechanism is used to pick up workpieces from the transition bin and transfer them to the circulating conveyor to complete automatic picking and hanging.

[0006] Preferably, the circulating conveying mechanism includes a circulating guide frame, a sprocket and chain mechanism mounted on the circulating guide frame, a hanger, and a drive unit. The sprocket and chain mechanism includes a driving sprocket, a driven sprocket, and a chain wound between the two. The hanger is connected to the chain and is used to carry the workpiece. The drive unit is connected to the driving sprocket and is used to drive the driving sprocket to rotate, thereby driving the chain to move along the circulating guide frame.

[0007] Preferably, the transition chamber includes: a column, a receiving plate fixedly disposed on the top of the column, and two positioning plates. The receiving plate has a receiving portion extending obliquely downward along the conveying direction and a stop portion connected to the downstream end of the receiving portion. The receiving portion is provided with a plurality of positioning holes spaced apart along its width direction. The two positioning plates are respectively disposed on opposite sides of the receiving portion, and the distance between the two positioning plates is adjustable. The bottom of each positioning plate is provided with a positioning post that mates with the positioning hole. The positioning post can be selectively inserted into the positioning hole at different positions to adjust the relative distance between the two positioning plates.

[0008] Preferably, the top of the support platform is provided with an annular guide rail, and the turntable is disposed at the top of the slider of the annular guide rail.

[0009] Preferably, the plurality of support frames are arranged in a circumferential array and the number is even. Each support frame includes a first side plate and a second side plate arranged opposite to each other. A top plate is connected between the first side plate and the second side plate. The first side plate, the second side plate and the top plate together form a downward-opening receiving space. A horizontal plate is also provided between the first side plate and the second side plate. The horizontal plate is located below the top plate. The bottom of the first side plate and the bottom of the second side plate extend away from the receiving space to form a first mounting part and a second mounting part, respectively.

[0010] Preferably, the lifting folding plate includes a horizontal part, a vertical part, and an inclined part that are fixedly connected in sequence. The horizontal part passes through and is slidably connected to the guide rod, and the inclined part matches the inclination of the transition chamber.

[0011] Preferably, the adsorption mechanism includes suction cups and a vacuum generator. A plurality of suction cups are arranged at the bottom end of the inclined part of the lifting folding plate, and the vacuum generator is disposed on the side wall of the vertical part of the lifting folding plate. The vacuum generator has a compressed air inlet, a vacuum suction chamber and an exhaust port. The suction cups are connected to the vacuum suction chamber through a hose, and the compressed air inlet is used to connect to an external compressed air source.

[0012] Preferably, the drive assembly includes an internal gear ring and a motor disposed at the top of the turntable, wherein the output shaft of the motor is provided with a gear, and the gear is meshed with the internal gear ring.

[0013] Preferably, the pressing mechanism includes two uprights and a pressure plate slidably disposed between the two uprights along the axial direction. The uprights are disposed at the top of the support platform. A second spring is disposed on the side wall of the upright through a protrusion between the bottom end of the pressure plate. A bearing rod is disposed at the top of the support platform. A ring seat is disposed on the bearing rod along the axial direction by fasteners. A circular electromagnet is fixedly disposed at the top of the ring seat. A ring iron is disposed at the bottom end of the pressure plate. The ring iron and the circular electromagnet are coaxially disposed.

[0014] Preferably, the supporting structure includes an irregularly shaped folded plate and a limiting folded plate disposed at the top of the irregularly shaped folded plate. The irregularly shaped folded plate is Z-shaped and inclined at the top to match the inclination of the transition chamber. The limiting folded plate is L-shaped and has multiple mounting grooves on its two inner walls. Rollers are rotatably installed in each mounting groove. Grooves are provided on both sides of the vertical section of the support frame to reserve space for intersecting with the limiting folded plate.

[0015] The beneficial effects of this invention are as follows: 1. By setting up a circulating conveyor mechanism, a feeding conveyor, a transition bin, and a pick-and-place mechanism, the sprocket and chain mechanism of the circulating conveyor mechanism drives the hanger to move continuously along the circulating guide rail frame. The feeding conveyor transports the workpiece to the transition bin for temporary storage. The turntable of the pick-and-place mechanism drives multiple support frames to rotate to the pick-and-place station. The adsorption mechanism picks up the workpiece in the transition bin and transfers it to the hanger. The resulting technical benefits are: automated connection between the feeding conveyor and the circulating conveyor line is achieved, and the processes of conveying, temporary storage, picking up, transferring and hanging are completed continuously and automatically without manual intervention, thereby improving the automation level and operating efficiency of the production line.

[0016] 2. By setting a receiving plate and two positioning plates in the transition chamber, the receiving plate has a receiving part that extends obliquely downward along the conveying direction and a stop part connected to the downstream end of the receiving part. The workpiece slides down along the oblique receiving part to the stop part and is automatically positioned. The distance between the two positioning plates can be adjusted according to the width of the workpiece by the insertion and cooperation of the positioning pin and the positioning hole. The technical effects achieved are: automatic gravity-driven sliding positioning of workpieces is realized without the need for additional drive mechanisms, simplifying the structure and reducing energy consumption. At the same time, the adjustable distance between the two positioning plates allows the transition chamber to quickly adapt to workpieces of different widths, improving the equipment's versatility and production changeover efficiency.

[0017] 3. By setting up the suction mechanism, pressing mechanism and supporting structure of the hanging mechanism, after the lifting plate descends, the suction cup will adsorb the workpiece at the bottom of the inclined part. The turntable will continue to rotate and move the workpiece to the corresponding position of the hanger. Then the lifting plate will descend again to complete the hanging. The circular electromagnet of the pressing mechanism will be energized to attract the ring iron and drive the pressure plate to assist in adjusting the descent height of the lifting plate, so that the distance between the suction cup and the workpiece surface is kept within the preset range. The irregular folding plate of the supporting structure will form a stable support for the bottom of the workpiece. The rollers on the inner wall of the limiting plate will roll and guide and limit the two sides of the workpiece during the hanging process. The technical effects achieved are: smooth transfer of workpiece from the transition chamber to the hanger; precise control of the distance between the suction cup and the workpiece by the pressing mechanism, which improves the reliability of vacuum adsorption; and the support structure that ensures the stability of the workpiece's posture during the hanging process, reduces frictional damage between the workpiece and the surrounding structure, and improves the success rate of pick-up and hang-up and the consistency of the hanging position. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an installation structure diagram of the circulating conveying mechanism in this invention; Figure 3 This is an exploded view of the transition chamber in this invention; Figure 4 This is an installation structure diagram of the hook-and-lift mechanism in this invention; Figure 5 This is an installation structure diagram of the support structure in this invention; Figure 6 This is a diagram showing the installation structure of the driving component in this invention; Figure 7 This is an installation structure diagram of the support frame, guide rod, and lifting folding plate in this invention; Figure 8 This is a structural diagram of the adsorption mechanism in this invention. Figure 9 This is an installation structure diagram of the pressing mechanism in this invention; Figure 10 This is a diagram showing the installation structure of the ring seat, circular electromagnet, and ring iron in this invention.

[0020] Explanation of reference numerals in the attached figures: 1. Circulating conveyor mechanism; 2. Feeding conveyor; 3. Transition bin; 4. Picking and hanging mechanism; 11. Circulating guide rail frame; 12. Sprocket and chain mechanism; 13. Hanging fixture; 31. Column; 32. Support plate; 33. Positioning plate; 41. Support platform; 411. Circular guide rail; 42. Turntable; 43. Support frame; 431. Groove; 44. Guide rod; 45. Lifting folding plate; 46. Adsorption mechanism; 461. Suction cup; 462. Vacuum generator; 47. First spring; 51. Internal gear ring; 52. Motor; 53. Gear; 61. Upright pole; 62. Pressure plate; 63. Second spring; 64. Bearing rod; 65. Ring seat; 66. Circular electromagnet; 67. Ring iron; 71. Irregularly shaped folding plate; 72. Limiting folding plate; 73. Roller. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the specific implementation methods, structures, features, and effects of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0022] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "inner" and "outer" are based on the orientation or position shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation, and therefore should not be construed as a limitation of this application.

[0023] Example 1: Reference Figures 1-10 The present invention discloses a suspended conveying device for painting sheet metal parts, comprising: To achieve the cyclic conveying and automatic retrieval of workpieces, this embodiment includes: a cyclic conveying mechanism 1, a feeding conveyor 2, a transition bin 3 located at the end of the feeding conveyor 2, and a retrieval mechanism 4 located between the cyclic conveying mechanism 1 and the transition bin 3. Through the coordinated arrangement of the cyclic conveying mechanism 1 and the feeding conveyor 2, and with the transition bin 3 located at the end of the feeding conveyor 2 and the retrieval mechanism 4 located between them, a continuous operation path is constructed whereby materials from the feeding conveyor 2 are temporarily stored in the transition bin 3 and then transferred to the cyclic conveying mechanism 1 by the retrieval mechanism 4. This achieves automated connection between the conveyor lines and the cyclic conveyor lines, avoids manual handling, and improves the continuity and automation level of the production line.

[0024] To achieve the suspended cyclic movement of the workpiece, in this embodiment: the cyclic conveying mechanism 1 includes a cyclic guide frame 11, a sprocket and chain mechanism 12 mounted on the cyclic guide frame 11, a hanger 13, and a drive unit. The sprocket and chain mechanism 12 includes a driving sprocket, a driven sprocket, and a chain wound between them. The hanger 13 is connected to the chain and is used to carry the workpiece. The drive unit is connected to the driving sprocket and is used to drive the driving sprocket to rotate, thereby driving the chain to move along the cyclic guide frame 11. Through the closed-loop cyclic movement of the sprocket and chain mechanism 12, the hanger 13 continuously rotates along the cyclic guide frame 11, realizing the cyclic conveying of the workpiece. The drive unit provides stable power output, ensuring the synchronicity of the chain movement and the accuracy of the hanger 13's position, providing a reliable docking basis for the precise transfer of the pick-and-place mechanism 4.

[0025] To achieve workpiece positioning and width adjustment, in this embodiment, the transition chamber 3 includes: a column 31, a receiving plate 32 fixedly disposed on the top of the column 31, and two positioning plates 33. The receiving plate 32 has a receiving part extending obliquely downward along the conveying direction and a stop part connected to the downstream end of the receiving part. The receiving part is provided with a plurality of positioning holes spaced apart along its width direction. The two positioning plates 33 are respectively disposed on opposite sides of the receiving part, and the distance between the two positioning plates 33 is adjustable. The bottom of each positioning plate 33 is provided with a positioning post that cooperates with the positioning hole. The positioning post can be selectively inserted into the positioning hole at different positions to adjust the relative distance between the two positioning plates 33. The inclined structure extending downwards from the receiving part allows the workpiece to automatically slide down to the stop for positioning under gravity, eliminating the need for an additional drive mechanism, simplifying the structure and reducing energy consumption. The adjustable spacing between the two positioning plates 33 allows the transition chamber 3 to quickly adapt to workpieces of different widths. The insertion and engagement of the positioning pins and positioning holes ensures the positional stability and repeatability of the positioning plates 33 after adjustment, improving the equipment's versatility and production changeover efficiency.

[0026] To achieve automatic workpiece pickup and transfer, in this embodiment: the picking and hanging mechanism 4 includes a support platform 41, a turntable 42 rotatably mounted on the top of the support platform 41, a driving component for driving the turntable 42 to rotate, a pressing mechanism mounted on the top of the support platform 41, and a supporting structure mounted on the top of the support platform 41. A ring-shaped guide rail 411 is mounted on the top of the ring-shaped guide rail 411, and the turntable 42 is mounted on the top of the slider of the ring-shaped guide rail 411. Multiple support frames 43 are mounted on the top of the turntable 42, arranged in a circular array with an even number of frames. Each support frame 43 includes a first side plate and a second side plate arranged opposite to each other. A top plate connects the first side plate and the second side plate, and the first side plate, the second side plate, and the top plate together form a downward-opening receiving space. A horizontal plate is also provided between the first side plate and the second side plate, located below the top plate. The bottom of the first side plate and the bottom of the second side plate extend away from the receiving space to form a first mounting portion and a second mounting portion, respectively. The mounting section has grooves 431 on both sides of the vertical section of the support frame 43. Multiple guide rods 44 are connected between the top of the support frame 43 and the support platform 41. A lifting baffle 45 is slidably connected between the multiple guide rods 44 along the axial direction. An adsorption mechanism 46 is provided on the lifting baffle 45. The lifting baffle 45 includes a horizontal part, a vertical part and an inclined part that are fixedly connected in sequence. The horizontal part is connected to the guide rods 44 and is slidably connected. The inclined part matches the inclination of the transition chamber 3. The adsorption mechanism 46 includes a suction cup 461 and a vacuum generator 462. Multiple suction cups 461 are arranged at the bottom of the inclined part of the lifting baffle 45. The vacuum generator 462 is located on the side wall of the vertical part of the lifting baffle 45. The vacuum generator 462 has a compressed air inlet, a vacuum suction chamber and an exhaust port. The suction cups 461 are connected to the vacuum suction chamber through a hose. The compressed air inlet is used to connect to an external compressed air source. Multiple first springs 47 are provided between the bottom of the horizontal part of the lifting baffle 45 and the support frame 43. The smooth rotation of the turntable 42 is achieved through the cooperation of the annular guide rail 411 and the turntable 42. Multiple support frames 43 are arranged in a circular array, enabling the pick-and-place mechanism 4 to complete the cycle switching of the two actions of suction and release at the same workstation, thus improving work efficiency. The inclined part of the lifting baffle 45 matches the inclination of the transition chamber 3, ensuring that the suction cup 461 is parallel and in contact with the workpiece surface when adsorbing the workpiece, thus improving the reliability of adsorption. The vacuum generator 462 uses compressed air to generate a vacuum, eliminating the need for a separate vacuum pump, resulting in a compact structure and rapid response. The first spring 47 provides the reset force of the lifting baffle 45, allowing it to automatically rise and reset after adsorption, simplifying the lifting drive structure.

[0027] To achieve the rotation drive of the turntable 42, in this embodiment, the drive assembly includes an internal gear ring 51 and a motor 52 disposed at the top of the turntable 42. A gear 53 is disposed on the output shaft of the motor 52, and the gear 53 meshes with the internal gear ring 51. The motor 52 drives the gear 53 to mesh with the internal gear ring 51, thereby achieving the rotational motion of the turntable 42. This transmission method has an accurate transmission ratio, strong load-bearing capacity, and smooth movement, ensuring the consistency of the rotation angle of the turntable 42 each time. This allows the support frame 43 to be precisely positioned at the material picking and unloading positions, improving the repeatability and positioning accuracy of the picking and hanging actions.

[0028] To achieve the downward positioning of the workpiece, in this embodiment, the downward pressing mechanism includes two uprights 61 and a pressure plate 62 slidably disposed between the two uprights 61. The uprights 61 are located at the top of the support platform 41. A second spring 63 is provided on the side wall of the uprights 61 through a protrusion between the bottom of the pressure plate 62. A bearing rod 64 is provided at the top of the support platform 41. A ring seat 65 is provided on the bearing rod 64 along the axial direction through fasteners. A circular electromagnet 66 is fixedly disposed at the top of the ring seat 65. A ring iron 67 is provided at the bottom of the pressure plate 62. The ring iron 67 and the circular electromagnet 66 are coaxially arranged. When the circular electromagnet 66 is energized, it attracts the ring iron 67, causing the pressure plate 62 to move downward against the elastic force of the second spring 63, applying downward pressure to the workpiece before adsorption, so that the workpiece is stable in posture and accurately positioned before adsorption. After the power is cut off, the second spring 63 pushes the pressure plate 62 to rise and reset. The electromagnetic control method has a rapid response and precise control, and forms a linkage with the action sequence of the adsorption mechanism 46, improving the success rate and stability of the hanging operation.

[0029] To achieve workpiece reception and hanging guidance, in this embodiment, the supporting structure includes an irregularly shaped folded plate 71 and a limiting folded plate 72 disposed at the top of the irregularly shaped folded plate 71. The irregularly shaped folded plate 71 is Z-shaped with an inclined top end that matches the inclination of the transition chamber 3. The limiting folded plate 72 is L-shaped, with multiple mounting slots on its two inner walls, each slot housing a rotatable roller 73. In actual operation, the lifting folded plate 45 of the hanging mechanism 4 descends, the adsorption mechanism 46 picks up the workpiece from the transition chamber 3 and rises to its reset position, the turntable 42 rotates 180 degrees to transfer the workpiece to the corresponding position on the hanger 13, and the lifting folded plate 45 descends again, completing the hanging action with the cooperation of the supporting structure. The Z-shaped structure of the irregular folding plate 71 and its inclined top end form a stable support for the bottom of the workpiece. The rollers 73 on the inner wall of the limiting folding plate 72 guide and limit the workpiece during the process of hanging it on the hanger 13. During the descent and reset of the hanging mechanism 4, the workpiece is kept in a stable posture, preventing the workpiece from shaking or shifting during the transfer and hanging process, thus ensuring the accuracy of the hanging position.

[0030] The working principle and usage process of this invention: The drive unit of the circulating conveying mechanism 1 drives the active sprocket to rotate, and the chain of the sprocket and chain mechanism 12 drives the hanger 13 to move continuously along the circulating guide rail frame 11. The hanger 13 carries the workpieces and passes through the pick-up and hanger stations in sequence to realize the circulating conveying of the workpieces. The feeding conveyor 2 continuously conveys the workpieces to be processed to the transition bin 3. The workpiece slides down the receiving part of the receiving plate 32, which extends downwards, and is positioned at the stop part. The positioning plate 33 on the receiving plate 32 can adjust the distance between the two positioning plates 33 according to the width of the workpiece to adapt to the temporary storage and positioning of workpieces of different sizes.

[0031] Driven by a motor 52, the turntable 42 of the hook-and-lift mechanism 4 rotates continuously around the annular guide rail 411 via the meshing transmission of gear 53 and internal gear ring 51, driving multiple support frames 43 to rotate sequentially to the hook-and-lift station. Before hook-and-lift, the circular electromagnet 66 of the pressing mechanism is energized to attract the ring iron 67, causing the pressure plate 62 to move downward. The pressure plate 62 abuts against the top of the lifting baffle 45, assisting in adjusting the descent height of the lifting baffle 45 to keep the distance between the suction cup 461 and the workpiece surface within a preset range. The lifting baffle 45 descends along the guide rod 44, and the vacuum generator 462 of the adsorption mechanism 46 is activated to generate negative pressure. The suction cup 461 is connected to the vacuum suction chamber through a hose, adsorbing the workpiece positioned in the transition chamber 3 onto the bottom end of the inclined part of the lifting baffle 45. After adsorption is completed, the circular electromagnet 66 is de-energized, the second spring 63 pushes the pressure plate 62 to rise and reset, and the lifting baffle 45 rises synchronously under the action of the first spring 47, removing the workpiece from the transition chamber 3. As the turntable 42 continues to rotate and transfers the workpiece to the corresponding position on the hanger 13, the lifting folding plate 45 descends again, completing the hanging action with the assistance of the supporting structure. The top of the irregularly shaped folding plate 71 of the supporting structure is tilted to match the inclination of the transition chamber 3. During the hanging process, the rollers 73 on the inner wall of the limiting folding plate 72 guide and limit the two sides of the workpiece, keeping the workpiece's posture stable. The vacuum generator 462 stops supplying air, causing the suction cup 461 to release the workpiece, which is then placed on the hanger 13 to complete the pick-up and hang-up process. The turntable 42 continues to rotate, causing each support frame 43 to pass through the picking-up station and the unloading station in sequence, achieving continuous cyclic picking and hanging.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A suspended conveying device for painting sheet metal parts, characterized in that, include: The circular conveying mechanism (1), the feeding conveyor (2), the transition bin (3) located at the end of the feeding conveyor (2), and the pick-and-hold mechanism (4) located between the circular conveying mechanism (1) and the transition bin (3); The hooking mechanism (4) includes a support platform (41), a turntable (42) rotatably disposed on the top of the support platform (41), a drive assembly for driving the turntable (42) to rotate, a pressing mechanism disposed on the top of the support platform (41), and a supporting structure disposed on the top of the support platform (41). The top of the turntable (42) is provided with multiple support frames (43). Multiple guide rods (44) are provided through the top of the support frame (43) and the support platform (41). A lifting baffle (45) is slidably disposed through the multiple guide rods (44) along the axial direction. An adsorption mechanism (46) is provided on the lifting baffle (45). Multiple first springs (47) are provided between the bottom of the horizontal part of the lifting baffle (45) and the support frame (43). The circulating conveying mechanism (1) is used to continuously convey workpieces; the feeding conveyor (2) is used to convey workpieces to the transition bin (3); the transition bin (3) is used to position and temporarily store workpieces; the picking and hanging mechanism (4) is used to pick up workpieces in the transition bin (3) and transfer them to the circulating conveying mechanism (1) to complete automatic picking and hanging.

2. The suspended conveying device for sheet metal painting according to claim 1, characterized in that, The circulating conveying mechanism (1) includes a circulating guide rail frame (11), a sprocket and chain mechanism (12) mounted on the circulating guide rail frame (11), a hanger (13) and a drive unit. The sprocket and chain mechanism (12) includes a driving sprocket, a driven sprocket and a chain wound between the two. The hanger (13) is connected to the chain and is used to carry the workpiece. The drive unit is connected to the driving sprocket and is used to drive the driving sprocket to rotate so as to drive the chain to move along the circulating guide rail frame (11).

3. The suspended conveying device for sheet metal painting according to claim 1, characterized in that, The transition chamber (3) includes: a column (31), a receiving plate (32) fixedly installed on the top of the column (31), and two positioning plates (33). The receiving plate (32) has a receiving part extending obliquely downward along the conveying direction and a stop part connected to the downstream end of the receiving part. The receiving part is provided with a plurality of positioning holes arranged at intervals along its width direction. The two positioning plates (33) are respectively set on opposite sides of the receiving part, and the distance between the two positioning plates (33) is adjustable. The bottom of each positioning plate (33) is provided with a positioning post that cooperates with the positioning hole. The positioning post can be selectively inserted into the positioning hole at different positions to adjust the relative distance between the two positioning plates (33).

4. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The top of the support platform (41) is provided with an annular guide rail (411), and the turntable (42) is provided at the top of the slider of the annular guide rail (411).

5. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, Multiple support frames (43) are arranged in a circumferential array and are set in an even number. Each support frame (43) includes a first side plate and a second side plate arranged opposite to each other. A top plate is connected between the first side plate and the second side plate. The first side plate, the second side plate and the top plate together form a downward-opening receiving space. A horizontal plate is also provided between the first side plate and the second side plate. The horizontal plate is located below the top plate. The bottom of the first side plate and the bottom of the second side plate extend away from the receiving space to form a first mounting part and a second mounting part, respectively.

6. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The lifting folding plate (45) includes a horizontal part, a vertical part and an inclined part that are fixedly connected in sequence. The horizontal part is connected to the guide rod (44) through and slidably, and the inclined part is matched with the inclination of the transition chamber (3).

7. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The adsorption mechanism (46) includes a suction cup (461) and a vacuum generator (462). A plurality of suction cups (461) are arranged at the bottom of the inclined part of the lifting baffle (45). The vacuum generator (462) is set on the side wall of the vertical part of the lifting baffle (45). The vacuum generator (462) has a compressed air inlet, a vacuum suction chamber and an exhaust port. The suction cup (461) is connected to the vacuum suction chamber through a hose. The compressed air inlet is used to connect to an external compressed air source.

8. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The drive assembly includes an internal gear ring (51) and a motor (52) disposed at the top of the turntable (42). The output shaft of the motor (52) is provided with a gear (53), which meshes with the internal gear ring (51).

9. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The pressing mechanism includes two uprights (61) and a pressure plate (62) that slides axially between the two uprights (61). The uprights (61) are located at the top of the support platform (41). A second spring (63) is provided on the side wall of the uprights (61) through a protrusion between the bottom end of the pressure plate (62). A bearing rod (64) is provided at the top of the support platform (41). A ring seat (65) is provided axially on the bearing rod (64) through fasteners. A circular electromagnet (66) is fixedly provided at the top of the ring seat (65). A ring iron (67) is provided at the bottom end of the pressure plate (62). The ring iron (67) and the circular electromagnet (66) are coaxially arranged.

10. A suspended conveyor device for painting sheet metal parts according to claim 1, characterized in that, The supporting structure includes an irregularly shaped folded plate (71) and a limiting folded plate (72) set at the top of the irregularly shaped folded plate (71). The irregularly shaped folded plate (71) is Z-shaped and the top is inclined to match the inclination of the transition chamber (3). The limiting folded plate (72) is L-shaped and has multiple mounting grooves on its two inner walls. Rollers (73) are rotatably installed in each mounting groove. The vertical section of the support frame (43) has grooves (431) on both sides facing each other, reserving space for intersecting with the limiting folded plate (72).

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