A painting device for a vehicle body and a control method thereof

Abstract

The application discloses a spraying device for automobile bodies and relates to the technical field of automobile production spraying. The spraying device comprises a base, the middle part of the base is provided with a lead screw driven by a first motor, the top end of the lead screw nut of the lead screw is provided with a bottom plate, the left and right sides of the base are both provided with tracks, the top end of the track is matched with a sliding seat, one side of the sliding seat is connected with the left side or the right side of the bottom plate through a first connecting plate, the top end of the sliding seat is provided with a supporting plate, the front and rear ends of the supporting plate are both provided with a plurality of moving mechanisms, the middle part of the supporting plate is provided with a supporting roller mechanism, the supporting roller mechanism comprises a supporting roller, the middle part of the bottom plate is provided with a tilting mechanism, the tilting mechanism comprises a plurality of first rollers which are longitudinally distributed, the front and rear ends of the bottom plate are both provided with transmission mechanisms, the front and rear ends of the supporting plate are both provided with supporting columns, and the supporting columns are connected with spraying mechanisms. The spraying device can automatically realize spraying processing of the whole automobile body and can meet the spraying processing requirements of automobile bodies of different sizes.

Description

Technical Field

[0001] This invention relates to the field of automotive manufacturing coating technology, specifically to a coating device for an automobile body and its control method. Background Technology

[0002] The car body is the most important component of a car and is the first part to be processed in the car assembly process. Only after the basic processing of the car body is completed can other parts be successively assembled onto the car body. During the production process, in order to protect the car body from corrosion and enhance its impact resistance, paint needs to be sprayed onto the surface of the car body.

[0003] However, existing car body painting processes require manual labor and the use of hoisting equipment to move and tilt the car body to the ground before painting can be done on the bottom of the car body. The level of intelligent processing is not high. Moreover, if the car body is not tilted or raised, the bottom of the car body cannot be painted, and the bottom of the car body is prone to corrosion. Over time, the corrosion area on the bottom of the car body will gradually spread to other parts of the car body, seriously affecting the performance of the car body.

[0004] Therefore, it is necessary to design a painting device for automobile bodies and its control method. Summary of the Invention

[0005] To address the shortcomings of the aforementioned technologies, this invention provides a painting device and a control method for the painting device that can automatically complete the painting process of the entire car body without requiring manual movement of the car body, and can meet the painting needs of car bodies of different sizes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] This invention discloses a car body painting device, which includes a base, a lead screw driven by a first motor in the middle of the base, a base plate at the top of the lead screw nut, rails on both the left and right sides of the base, a sliding seat at the top of the rails, one side of the sliding seat being connected to the left or right side of the base plate via a first connecting plate, a support plate at the top of the sliding seat, several moving mechanisms at both the front and rear ends of the support plate, a roller support mechanism in the middle of the support plate including rollers that can switch between horizontal and vertical directions, a tilting mechanism in the middle of the base plate including several longitudinally distributed first rollers, a transmission mechanism at both the front and rear ends of the base plate, and support columns at both the front and rear ends of the support plate, with the support columns connected to the painting mechanism.

[0008] Furthermore, the moving mechanism includes a second roller, a first universal joint arm, and a lifter. A first connecting seat is provided on one side of the second roller, and a first hinge portion is provided at both the upper and lower ends of the first connecting seat. One end of the first universal joint arm is connected to a first connecting member through a horizontally arranged rotating shaft. Both the upper and lower ends of the first connecting member are hinged to the first hinge portion. The other end of the first universal joint arm is connected to a first drive shaft. The middle part of the first drive shaft is connected to a support plate through a second connecting seat. A first gear is provided at the end of the first drive shaft away from the first universal joint arm. All the first gears mesh with a gear belt. One of the first gears is a stepped gear. The lifter is located below the second roller and is movably connected to the second roller.

[0009] Furthermore, the lifting device includes a lifting plate and a second motor. The second motor is fixed to the bottom surface of the base plate. The driving end of the second motor is provided with a second gear. The base plate above the second motor is provided with a through hole. The bottom end of the lifting plate fits into the through hole. The rear wall of the lifting plate is provided with a vertically extending gear tooth segment. The gear teeth on the second gear mesh with the gear tooth segment. The front wall of the lifting plate is provided with a vertically extending protrusion. The base plate in front of the through hole is provided with a first groove for engaging the protrusion. The top of the lifting plate is provided with a longitudinally extending support plate. The surface of the support plate is provided with at least two claws. The left and right edges of the second roller are both convex. The surface of the convex edge away from the center of the second roller is provided with multiple rings of second grooves. The second grooves are distributed in stages from the center of the second roller to the outside of the second roller, and the outer diameter gradually increases. The claws engage with the outside of the second grooves.

[0010] Furthermore, the roller support mechanism also includes a second universal joint connecting arm, a third universal joint connecting arm, a swing arm connecting seat, and a swing arm. The surface of the support plate is provided with at least two second universal joint connecting arms, and the third universal joint connecting arm is located on the support plate surface between the two second universal joint connecting arms. Both the second and third universal joint connecting arms are connected to a second drive shaft. The middle part of the second drive shaft is connected to the support plate through the third connecting seat. One end of the third universal joint connecting arm is connected to a second connector through a vertically arranged rotating shaft. Both ends of the second connector are provided with T-shaped hinge joints. One end of the swing arm connecting seat is provided with a hinge seat. One end of the hinge joint is hinged to the hinge seat. One end of the second universal joint connecting arm is connected to the swing arm connecting seat. One end of the swing arm is connected to one side of the swing arm connecting seat. The roller is connected to the other end of the swing arm through a rotating shaft.

[0011] Furthermore, one end of the second universal joint arm is connected to a connector, and both the upper and lower ends of the connector are connected to the end of the second universal joint arm via a pivot. The end of the connector away from the second universal joint arm extends into the swing arm connecting seat and is connected to a crank. The other end of the crank is eccentrically connected to the end of the swing arm.

[0012] Furthermore, the tilting mechanism also includes a third motor, a first transmission wheel, a second transmission wheel, and a third transmission shaft. At least two third motors are fixedly connected to the bottom surface of the middle part of the base plate. A fixing frame is provided on the middle surface of the base plate. The top of the fixing frame is provided with a first transmission wheel. The third transmission shaft is fitted in the middle of the transmission wheel and extends outward from the fixing frame. The driving end of the third motor is connected to the second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a transmission belt. The third transmission shaft is fitted with at least two first rollers.

[0013] Furthermore, the transmission mechanism includes a fourth motor, a first electric guide rail, and a second electric guide rail. The surfaces at both ends of the base plate are provided with several pairs of fixed seats. The left and right sides of one end of the first electric guide rail and the left and right sides of one end of the second electric guide rail are connected to the fixed seats through rotating shafts. At least two fourth motors are provided on the surface of the base plate outside the fixed seats. The two fourth motors are respectively connected to one rotating shaft of the first electric guide rail and one rotating shaft of the second electric guide rail.

[0014] Furthermore, the spraying mechanism includes a third electric guide rail, a fourth connecting seat, a cylinder, and a sprayer. The third electric guide rail is fixed between two support columns. The fourth connecting seat is connected to the drive end of the third electric guide rail. The fourth connecting seat is provided with at least two cylinders with downward-facing drive ends. The drive ends of the cylinders are connected to a second connecting plate. The sprayer is located at the bottom end of the second connecting plate.

[0015] The present invention also discloses a control method for an automobile body painting device, which is used to control the aforementioned automobile body painting device, and includes the following steps:

[0016] Step S1: The car body is transported to the end of the transmission mechanism by the hoisting equipment. The first electric guide rail and the second electric guide rail in the transmission mechanism drive the car body to be transferred to the moving mechanism.

[0017] Step S2: The first drive shaft in the moving mechanism rotates, the first universal joint arm rotates with the rotation of the first drive shaft, and the second roller rotates with the rotation of the first universal joint arm and drives the car body to be transmitted to the roller support mechanism.

[0018] Step S3: After the middle part of the car body is supported by the support roller in the support roller mechanism, the sprayer in the spraying mechanism moves back and forth under the drive of the third electric guide rail to spray the car body, thereby achieving paint spraying treatment on the left and right sides of the car body.

[0019] Step S4: After the sprayer moves back and forth several times, the spraying mechanism stops working, and the second motor drives the lifting plate to move upward, lifting the car body until the support roller in the support roller mechanism no longer supports the car body.

[0020] Step S5: The third universal joint arm in the roller support mechanism moves away from the vehicle body, and the swing arm connecting seat connected to the end of the second universal joint arm is pulled by the third universal joint arm and swings from the lateral direction to the longitudinal direction. The roller support also swings from the lateral direction to the longitudinal direction.

[0021] Step S6: Pull the second and third universal joint arms to move away from the car body, so that the support roller is not under the car body. The second motor drives the lifting plate to move downward until it descends to the bottom of the car body and is supported by the first roller.

[0022] Step S7: Pull the second and third universal joint arms to move towards the car body, so that the support roller moves towards the car body and contacts the B-pillar of the car body. The third motor drives the first roller to rotate, so that the car body tilts to the left or right. The sprayer in the spraying mechanism sprays the car body in a reciprocating manner under the drive of the third electric guide rail, so as to achieve paint spraying treatment on the top and bottom surfaces of the car body.

[0023] Step S8: The second motor drives the lifting plate to move upward, so that the second roller contacts the bottom of the car body. The first universal joint arm rotates, driving the second roller to rotate, so that the car body moves towards the transmission mechanism in the equipment away from the loading point. The first electric guide rail and the second electric guide rail of the transmission mechanism drive the car body to unload.

[0024] The beneficial effects of this invention are as follows:

[0025] The spraying device and control method disclosed in this invention can automatically load and unload car bodies via a transmission mechanism, and move the car body to the support roller mechanism. The support rollers in the support roller mechanism can switch between longitudinal and transverse directions. When the support rollers are arranged transversely, they can cooperate with the first roller in the moving mechanism to support the car body, facilitating the spraying mechanism to spray paint on the left and right sides of the car body. When the support rollers are arranged longitudinally, they will be in close contact with the surface of the B-pillar of the car body, thus maintaining the stability of the car body on the left and right sides when the tilting mechanism tilts the car body, ensuring more stable spraying on the top and bottom of the car body, realizing fully automatic spraying of the entire car body without manual movement, and meeting the spraying needs of car bodies of different sizes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the top structure of the spraying device.

[0027] Figure 2 This is a schematic diagram of the bottom structure of the spraying device.

[0028] Figure 3 This is a schematic diagram of the structure when the sliding seat is fitted onto the track.

[0029] Figure 4 This is a schematic diagram of the moving mechanism.

[0030] Figure 5 This is a schematic diagram of the structure in which the first connecting member is hinged to the first hinge part.

[0031] Figure 6 for Figure 1 A magnified view of a portion of point A in the middle.

[0032] Figure 7 This is a schematic diagram of the roller support mechanism.

[0033] Figure 8 This is a schematic diagram of the crank mechanism.

[0034] Figure 9 This is a schematic diagram of the tilting mechanism.

[0035] Figure 10 This is a schematic diagram of the transmission mechanism.

[0036] Figure 11 This is a schematic diagram of the spraying mechanism.

[0037] Figure 12 This is a schematic diagram illustrating the principle of a control method for an automobile body painting device.

[0038] In the diagram, 1. Base; 2. First motor; 3. Lead screw; 4. Base plate; 5. Rail; 6. Sliding seat; 7. First connecting plate; 8. Support plate; 9. Moving mechanism; 10. Roller support mechanism; 11. Roller support; 12. Tilting mechanism; 13. First roller; 14. Transmission mechanism; 15. Support column; 16. Spraying mechanism; 17. Second roller; 18. First universal joint arm; 19. Lifter; 20. First connecting seat; 21. First hinge; 22. First connector; 23. First drive shaft; 24. Second connecting seat; 25. First gear; 26. Lifting plate; 27. Second motor; 28. Second gear; 29. ​​Through hole; 30. Gear tooth segment; 31. Protrusion; 32. First groove; 33. 34. Pad; 35. Claw; 36. Protruding edge; 37. Second groove; 38. Second universal joint arm; 39. Third universal joint arm; 40. Swing arm connecting seat; 41. Swing arm; 42. Second drive shaft; 43. Third connecting seat; 44. Second connecting piece; 45. Hinge joint; 46. Hinge seat; 47. Connector; 48. Crank; 49. Third motor; 50. First drive wheel; 51. Second drive wheel; 52. Third drive shaft; 53. Fixing frame; 54. Fourth motor; 55. First electric guide rail; 56. Second electric guide rail; 57. Fixing seat; 58. Gear belt; 59. Third electric guide rail; 60. Fourth connecting seat; 61. Cylinder; 62. Sprayer; 63. Second connecting plate. Detailed Implementation

[0039] This invention discloses a painting device for automobile bodies, such as... Figures 1-3 As shown, the spraying device includes a base 1, a lead screw 3 driven by a first motor 2 in the middle of the base 1, a base plate 4 at the top of the lead screw nut of the lead screw 3, rails 5 on both the left and right sides of the base 1, a sliding seat 6 at the top of the rails 5, one side of the sliding seat 6 being connected to the left or right side of the base plate 4 via a first connecting plate 7, a support plate 8 at the top of the sliding seat 6, several moving mechanisms 9 at both the front and rear ends of the support plate 8, a roller support mechanism 10 in the middle of the support plate 8, the roller support mechanism 10 including rollers 11 that can switch between horizontal and vertical directions, a tilting mechanism 12 in the middle of the base plate 4, the tilting mechanism 12 including several longitudinally distributed first rollers 13, a transmission mechanism 14 at both the front and rear ends of the base plate 4, and a support column 15 at both the front and rear ends of the support plate 8, the support column 15 being connected to a spraying mechanism 16.

[0040] The first motor 2 drives the lead screw 3 to rotate. When the lead screw 3 rotates, it will drive the base plate 4, the support plate 8, and the components on the base plate 4 and the support plate 8 to move, thereby adjusting the position of the entire spraying device except for the base 1.

[0041] In addition, the spraying device and the automatic loading and unloading of the car body can be performed through the transmission mechanism 14. The moving mechanism 9 can move the car body to the support roller mechanism 10. The support roller 11 in the support roller mechanism 10 can be switched in both longitudinal and transverse directions. When the support roller 11 is arranged transversely, it can cooperate with the first roller 13 in the moving mechanism 9 to support the car body, making it convenient for the spraying mechanism 16 to spray paint on the left and right sides of the car body. When the support roller 11 is arranged longitudinally, it will be close to the surface of the B-pillar of the car body, so that when the tilting mechanism 12 tilts the car body, it can maintain the stability of the car body on the left and right sides, ensuring that the spraying of the top and bottom of the car body is more stable.

[0042] like Figures 4-6 As shown, the moving mechanism 9 includes a second roller 17, a first universal joint arm 18, and a lifter 19. A first connecting seat 20 is provided on one side of the second roller 17. The first connecting seat 20 has a first hinge portion 21 at both its upper and lower ends. One end of the first universal joint arm 18 is connected to a first connecting member 22 via a horizontally arranged rotating shaft. The upper and lower ends of the first connecting member 22 are hinged to the first hinge portion 21. The other end of the first universal joint arm 18 is connected to a first drive shaft 23. The middle part of the first drive shaft 23 is connected to the support plate 8 via a second connecting seat 24. A first gear 25 is provided at the end of the first drive shaft 23 away from the first universal joint arm 18. All the first gears 25 mesh with a gear belt 57. One of the first gears 25 is a stepped gear. The lifter 19 is located below the second roller 17 and is movably connected to the second roller 17.

[0043] Among them, a stepped gear is used as the first gear 25 to connect with the external transmission device (not shown in the figure) to provide a power source for the rotation of the first universal joint arm 18. The first universal joint arm 18 is used as the connecting part between the first drive shaft 23 and the second roller 17. The height of the second roller 17 can be adjusted synchronously during the rolling process of the second roller 17, which helps to shorten the position adjustment time of the second roller 17.

[0044] like Figures 4-6As shown, the lifting device 19 includes a lifting plate 26 and a second motor 27. The second motor 27 is fixed to the bottom surface of the base plate 4. The driving end of the second motor 27 is provided with a second gear 28. The base plate 4 above the second motor 27 is provided with a through hole 29. The bottom end of the lifting plate 26 fits into the through hole 29. The rear wall of the lifting plate 26 is provided with a vertically extending gear tooth segment 30. The gear teeth on the second gear 28 mesh with the gear tooth segment 30. The front wall of the lifting plate 26 is provided with a vertically extending protrusion 31. The through hole 29... The base plate 4 at the front of the 9 is provided with a first groove 32 for cooperating with the protrusion 31. The top of the lifting plate 26 is provided with a longitudinally extending support plate 33. The surface of the support plate 33 is provided with at least two hooks 34. The left and right sides of the second roller 17 are both provided with a ring of protruding edge 35. The surface of the protruding edge 35 away from the center of the second roller 17 is provided with multiple rings of second grooves 36. The second grooves 36 are distributed in stages from the center of the second roller 17 to the outside of the second roller 17 and the outer diameter gradually increases. The hooks 34 cooperate with the outside of the second grooves 36.

[0045] Specifically, the second motor 27 drives the second gear 28 to rotate, and when the second gear 28 rotates, it drives the lifting plate 26 to move up and down through the gear tooth section 30. When the lifting plate 26 moves downward, the hook 34 pulls the second roller 17 downward. When the lifting plate 26 moves upward, the support plate 33 pushes upward against the bottom of the second roller 17, thereby lifting the second roller 17 upward. At this time, the hook 34 acts as a limit to prevent the second roller 17 from shifting to the left or right. In addition, the convex edge 35 limits the bottom edges of the left and right sides of the car body to prevent the bottom edges of the left and right sides of the car body from deviating from the surface of the second roller 17 when the second roller 17 rolls, thus adapting to the support needs of car bodies of different widths and sizes.

[0046] like Figure 1 , Figure 7 and Figure 8As shown, the roller support mechanism 10 further includes a second universal joint arm 37, a third universal joint arm 38, a swing arm connecting seat 39, and a swing arm 40. At least two second universal joint arms 37 are provided on the surface of the support plate 8. The third universal joint arm 38 is located on the surface of the support plate 8 between the two second universal joint arms 37. Both the second universal joint arms 37 and the third universal joint arm 38 are connected to a second drive shaft 41. The middle part of the second drive shaft 41 is connected to the support plate 8 through a third connecting seat 42. One end of the third universal joint arm 38 is connected to the second connector 43 via a vertically arranged pivot. The two ends of the second connector 43 are provided with T-shaped hinge joints 44. One end of the swing arm connecting seat 39 is provided with a hinge seat 45. One end of the hinge joint 44 is hinged to the hinge seat 45. One end of the second universal joint arm 37 is connected to the swing arm connecting seat 39. One end of the swing arm 40 is connected to one side of the swing arm connecting seat 39. The support roller 11 is connected to the other end of the swing arm 40 via a pivot.

[0047] All of the second drive shafts 41 are individually connected to an external drive unit (not shown in the figure) to adjust the position of the second universal joint arm 37 and the third universal joint arm 38 in the longitudinal direction and the position of the support roller 11. When the support roller 11 needs to be switched from a transverse arrangement to a longitudinal arrangement, the second drive shaft 41 can be pulled away from the vehicle body by the drive unit, and the third universal joint arm 38 will move away from the vehicle body accordingly. Under the connection of the hinge joint 44 and the hinge seat 45, the swing arm connecting seat 39 will swing under the traction of the third universal joint arm 38, thereby converting the support roller 11 into a longitudinal arrangement.

[0048] like Figure 8 As shown, one end of the second universal joint arm 37 is connected to a connector 46. Both the upper and lower ends of the connector 46 are connected to the end of the second universal joint arm 37 via a pivot. The end of the connector 46 away from the second universal joint arm 37 passes through the swing arm connecting seat 39 and is connected to a crank 47. The other end of the crank 47 is eccentrically connected to the end of the swing arm 40.

[0049] When the support roller 11 is not changed from a transverse arrangement to a longitudinal arrangement, the second drive shaft 41 can rotate under the drive of the drive device, thereby driving the second universal joint arm 37 to rotate. The second universal joint arm 37 drives the crank 47 to move through the connector 46, and drives the swing arm 40 to swing through the crank 47, thereby adjusting the height and position of the support roller 11.

[0050] like Figure 3 and Figure 9As shown, the tilting mechanism 12 further includes a third motor 48, a first transmission wheel 49, a second transmission wheel 50, and a third transmission shaft 51. At least two third motors 48 are fixedly connected to the bottom surface of the middle part of the base plate 4. A fixing frame 52 is provided on the middle surface of the base plate 4. The top of the fixing frame 52 is provided with the first transmission wheel 49. The third transmission shaft 51 is fitted in the middle of the transmission wheel and extends outward from the fixing frame 52. The driving end of the third motor 48 is connected to the second transmission wheel 50. The first transmission wheel 49 and the second transmission wheel 50 are connected by a transmission belt. The third transmission shaft 51 is fitted with at least two first rollers 13.

[0051] The third motor 48 drives the second transmission wheel 50 to rotate, and the power is transmitted to the first transmission wheel 49 through the transmission belt. The first transmission wheel 49 drives the third transmission shaft 51 to rotate, and the first roller 13 on the third transmission shaft 51 rotates accordingly. Under the drive of the longitudinally arranged first roller 13, the bottom of the car body begins to shift and then tilts, which facilitates the painting mechanism 16 to paint the bottom and top of the car body.

[0052] like Figure 10 As shown, the transmission mechanism 14 includes a fourth motor 53, a first electric guide rail 54, and a second electric guide rail 55. The surfaces of the front and rear ends of the base plate 4 are provided with a plurality of paired fixed seats 56. The left and right sides of one end of the first electric guide rail 54 and the left and right sides of one end of the second electric guide rail 55 are connected to the fixed seats 56 through rotating shafts. At least two fourth motors 53 are provided on the surface of the base plate 4 outside the fixed seats 56. The two fourth motors 53 are respectively connected to one rotating shaft of the first electric guide rail 54 and one rotating shaft of the second electric guide rail 55.

[0053] During loading, after the car body is placed on the surface of the first electric guide rail 54, the first electric guide rail 54 starts and moves the car body. Then, the second electric guide rail 55 moves the car body towards the moving mechanism 9. The fourth motor 53 can make the first electric guide rail 54 and the second electric guide rail 55 swing with one end of itself as the swing axis, thereby adjusting the position. This not only facilitates the operation during loading or unloading, but also increases the smoothness of the docking position between the transmission mechanism 14 and the moving mechanism 9.

[0054] like Figure 11As shown, the spraying mechanism 16 includes a third electric guide rail 58, a fourth connecting seat 59, a cylinder 60, and a sprayer 61. The third electric guide rail 58 is fixed between two support columns 15. The fourth connecting seat 59 is connected to the drive end of the third electric guide rail 58. The fourth connecting seat 59 is provided with at least two cylinders 60 with downward drive ends. The drive ends of the cylinders 60 are connected to a second connecting plate 62. The sprayer 61 is located at the bottom end of the second connecting plate 62.

[0055] The sprayer 61 can be moved laterally by the third electric guide rail 58, and the position of the sprayer 61 can be adjusted by the cylinder 60, thereby realizing the adjustment of the spraying position of the sprayer 61.

[0056] This invention also discloses a control method for an automobile body painting device, such as... Figure 12 As shown, the control method is used to control the aforementioned car body painting device, and includes the following steps:

[0057] Step S1: The car body is transported to the end of the transmission mechanism by the hoisting equipment. The first electric guide rail and the second electric guide rail in the transmission mechanism drive the car body to be transferred to the moving mechanism.

[0058] Step S2: The first drive shaft in the moving mechanism rotates, the first universal joint arm rotates with the rotation of the first drive shaft, and the second roller rotates with the rotation of the first universal joint arm and drives the car body to be transmitted to the roller support mechanism.

[0059] Step S3: After the middle part of the car body is supported by the support roller in the support roller mechanism, the sprayer in the spraying mechanism moves back and forth under the drive of the third electric guide rail to spray the car body, thereby achieving paint spraying treatment on the left and right sides of the car body.

[0060] Step S4: After the sprayer moves back and forth several times, the spraying mechanism stops working, and the second motor drives the lifting plate to move upward, lifting the car body until the support roller in the support roller mechanism no longer supports the car body.

[0061] Step S5: The third universal joint arm in the roller support mechanism moves away from the vehicle body, and the swing arm connecting seat connected to the end of the second universal joint arm is pulled by the third universal joint arm and swings from the lateral direction to the longitudinal direction. The roller support also swings from the lateral direction to the longitudinal direction.

[0062] Step S6: Pull the second and third universal joint arms to move away from the car body, so that the support roller is not under the car body. The second motor drives the lifting plate to move downward until it descends to the bottom of the car body and is supported by the first roller.

[0063] Step S7: Pull the second and third universal joint arms to move towards the car body, so that the support roller moves towards the car body and contacts the B-pillar of the car body. The third motor drives the first roller to rotate, so that the car body tilts to the left or right. The sprayer in the spraying mechanism sprays the car body in a reciprocating manner under the drive of the third electric guide rail, so as to achieve paint spraying treatment on the top and bottom surfaces of the car body.

[0064] Step S8: The second motor drives the lifting plate to move upward, so that the second roller contacts the bottom of the car body. The first universal joint arm rotates, driving the second roller to rotate, so that the car body moves towards the transmission mechanism in the equipment away from the loading point. The first electric guide rail and the second electric guide rail of the transmission mechanism drive the car body to unload.

[0065] This control method can achieve fully automated painting of the entire car body without the need for manual movement of the car body, and can meet the painting needs of car bodies of different sizes.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spraying device for automobile body, comprising a base, a middle part of the base is provided with a lead screw driven by a first motor, a top end of a lead screw nut of the lead screw is provided with a bottom plate, left and right sides of the base are both provided with a track, a top end of the track is matched with a sliding seat, one side of the sliding seat is connected with the left side or the right side of the bottom plate through a first connecting plate, a top end of the sliding seat is provided with a supporting plate, characterized in that, The support plate has several moving mechanisms at both its front and rear ends. A roller support mechanism is located in the middle of the support plate, including rollers that can switch between horizontal and vertical directions. A tilting mechanism is located in the middle of the base plate, including several longitudinally distributed first rollers. A transmission mechanism is located at both the front and rear ends of the base plate. Support columns are located at both the front and rear ends of the support plate, and these columns are connected to a spraying mechanism. The moving mechanism includes a second roller, a first universal joint arm, and a lifting device. A first connecting seat is located on one side of the second roller, and first hinge portions are located at both the upper and lower ends of the first connecting seat. One end of the first universal joint arm is connected to a first connecting member via a horizontally arranged pivot. Both the upper and lower ends of the first connecting member are hinged to the first hinge portion. The other end of the first universal joint arm is connected to a first transmission mechanism. The first drive shaft is connected to the support plate via a second connecting seat in the middle. A first gear is provided at the end of the first drive shaft away from the first universal joint arm. All the first gears mesh with a gear belt. One of the first gears is a stepped gear. The lifting device is located below the second roller and is movably connected to the second roller. The moving mechanism can move the car body to the support roller mechanism. The support roller in the support roller mechanism can switch between longitudinal and transverse directions. When the support roller is arranged transversely, it can cooperate with the first roller in the moving mechanism to support the car body, which facilitates the painting mechanism to spray paint on the left and right sides of the car body. When the support roller is arranged longitudinally, it will be close to the surface of the B-pillar of the car body, so that when the tilting mechanism tilts the car body, it can maintain the stability of the car body on the left and right sides.

2. A painting device for a vehicle body according to claim 1, wherein The lifting device includes a lifting plate and a second motor. The second motor is fixed to the bottom surface of the base plate. The drive end of the second motor is provided with a second gear. The base plate above the second motor has a through hole. The bottom end of the lifting plate fits into the through hole. The rear wall of the lifting plate has a vertically extending gear tooth segment. The gear teeth on the second gear mesh with the gear tooth segment. The front wall of the lifting plate has a vertically extending protrusion. The base plate in front of the through hole has a first groove for engaging the protrusion. The top of the lifting plate has a longitudinally extending support plate. The surface of the support plate has at least two claws. The left and right edges of the second roller are both convex. The surface of the convex edge away from the center of the second roller has multiple rings of second grooves. The second grooves are distributed in stages from the center of the second roller to the outside of the second roller, and the outer diameter gradually increases. The claws engage with the outside of the second grooves.

3. A painting device for a vehicle body according to claim 2, wherein The roller support mechanism further includes a second universal joint arm, a third universal joint arm, a swing arm connecting seat, and a swing arm. The surface of the support plate is provided with at least two second universal joint arms, and the third universal joint arm is located on the support plate surface between the two second universal joint arms. Both the second and third universal joint arms are connected to a second drive shaft. The middle part of the second drive shaft is connected to the support plate through the third connecting seat. One end of the third universal joint arm is connected to a second connector through a vertically arranged rotating shaft. Both ends of the second connector are provided with T-shaped hinge joints. One end of the swing arm connecting seat is provided with a hinge seat, and one end of the hinge joint is hinged to the hinge seat. One end of the second universal joint arm is connected to the swing arm connecting seat, and one end of the swing arm is connected to one side of the swing arm connecting seat. The roller is connected to the other end of the swing arm through a rotating shaft.

4. A painting device for a vehicle body according to claim 3, wherein One end of the second universal joint arm is connected to a connector. Both the upper and lower ends of the connector are connected to the end of the second universal joint arm via a pivot. The end of the connector away from the second universal joint arm extends into the swing arm connecting seat and is connected to a crank. The other end of the crank is eccentrically connected to the end of the swing arm.

5. A painting device for a vehicle body according to claim 4, wherein The tilting mechanism further includes a third motor, a first transmission wheel, a second transmission wheel, and a third transmission shaft. At least two third motors are fixedly connected to the bottom surface of the middle part of the base plate. A fixing frame is provided on the middle surface of the base plate. The top of the fixing frame is provided with a first transmission wheel. The third transmission shaft is fitted in the middle of the transmission wheel and extends outward from the fixing frame. The driving end of the third motor is connected to the second transmission wheel. The first transmission wheel and the second transmission wheel are connected by a transmission belt. The third transmission shaft is fitted with at least two first rollers.

6. A painting device for a vehicle body according to claim 5, wherein The transmission mechanism includes a fourth motor, a first electric guide rail, and a second electric guide rail. Several pairs of fixed seats are provided on the surfaces of both the front and rear ends of the base plate. The left and right sides of one end of the first electric guide rail and the left and right sides of one end of the second electric guide rail are connected to the fixed seats through rotating shafts. At least two fourth motors are provided on the surface of the base plate outside the fixed seats. The two fourth motors are respectively connected to one rotating shaft of the first electric guide rail and one rotating shaft of the second electric guide rail.

7. A painting device for a vehicle body according to claim 6, wherein The spraying mechanism includes a third electric guide rail, a fourth connecting seat, a cylinder, and a sprayer. The third electric guide rail is fixed between two support columns. The fourth connecting seat is connected to the drive end of the third electric guide rail. The fourth connecting seat is provided with at least two cylinders with downward-facing drive ends. The drive ends of the cylinders are connected to a second connecting plate. The sprayer is located at the bottom end of the second connecting plate.

8. A control method of a painting device for a vehicle body, the control method being used to control the painting device for a vehicle body according to claim 7, characterized by, Includes the following steps: Step S1: The car body is transported to the end of the transmission mechanism by the hoisting equipment. The first electric guide rail and the second electric guide rail in the transmission mechanism drive the car body to be transferred to the moving mechanism. Step S2: The first drive shaft in the moving mechanism rotates, the first universal joint arm rotates with the rotation of the first drive shaft, and the second roller rotates with the rotation of the first universal joint arm and drives the car body to be transmitted to the roller support mechanism. Step S3: After the middle part of the car body is supported by the support roller in the support roller mechanism, the sprayer in the spraying mechanism moves back and forth under the drive of the third electric guide rail to spray the car body, thereby achieving paint spraying treatment on the left and right sides of the car body. Step S4: After the sprayer moves back and forth several times, the spraying mechanism stops working, and the second motor drives the lifting plate to move upward, lifting the car body until the support roller in the support roller mechanism no longer supports the car body. Step S5: The third universal joint arm in the roller support mechanism moves away from the vehicle body, and the swing arm connecting seat connected to the end of the second universal joint arm is pulled by the third universal joint arm and swings from the lateral direction to the longitudinal direction. The roller support also swings from the lateral direction to the longitudinal direction. Step S6: Pull the second and third universal joint arms to move away from the car body, so that the support roller is not under the car body. The second motor drives the lifting plate to move downward until it descends to the bottom of the car body and is supported by the first roller. Step S7: Pull the second and third universal joint arms to move towards the car body, so that the support roller moves towards the car body and contacts the B-pillar of the car body. The third motor drives the first roller to rotate, so that the car body tilts to the left or right. The sprayer in the spraying mechanism sprays the car body in a reciprocating manner under the drive of the third electric guide rail, so as to achieve paint spraying treatment on the top and bottom surfaces of the car body. Step S8: The second motor drives the lifting plate to move upward, so that the second roller contacts the bottom of the car body. The first universal joint arm rotates, driving the second roller to rotate, so that the car body moves towards the transmission mechanism in the equipment away from the loading point. The first electric guide rail and the second electric guide rail of the transmission mechanism drive the car body to unload.

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