A car door painting fixing mechanism and its control method

Abstract

This invention discloses a car door painting fixing mechanism, relating to the field of automotive painting technology. The fixing mechanism includes a swing bracket, a moving bracket, a drive device, a support plate, and clamping heads. The clamping heads are connected to the bottom end of the drive device on one side of the support plate and form a 45° angle with the longitudinal axis. The two clamping heads on the left and right sides of the swing bracket are located at the ends of a straight line inclined at 45° to the longitudinal axis. This fixing mechanism can automatically perform loading and unloading operations and can clamp the two corners of the car door that are inclined at 45° relative to the longitudinal axis, thereby reducing swaying when conveying long car doors to the workstation. This invention also discloses a control method for the car door painting fixing mechanism. This control method can automatically realize the loading and unloading operations of the car door, the clamping and fixing of the car door during the painting process, and the position adjustment of the car door during the painting process, thereby improving the efficiency of the car door painting process.

Description

Technical Field

[0001] This invention relates to the field of automotive painting technology, specifically to an automotive door painting fixing mechanism and its control method. Background Technology

[0002] As a major exterior component of a car, the car door requires surface coating during the car production process to ensure that a protective and aesthetically pleasing coating is formed on the door surface.

[0003] In the existing automotive door painting process, the door needs to be fixed in position by a fixing mechanism to ensure that its position remains unchanged during the painting process. However, when loading or unloading the door, workers need to manually fix the door to or remove it from the fixing mechanism. Workers need to exert a lot of physical strength during the loading or unloading process, and the operation is also time-consuming. The level of automation in fixing the door to the fixing mechanism is low.

[0004] After the car door is fixed to the fixing mechanism, due to the different sizes and specifications of the car doors, some larger and longer car doors will sway more when they are transferred from the fixing mechanism to the spraying position. Moreover, both sides of the car door need to be coated, so the car door needs to be flipped during the coating process. However, due to the large size of the car door, the movement during the flipping is large, resulting in greater swaying during the process. The swaying of the car door will have a certain impact on the safety of the coating process.

[0005] Therefore, it is necessary to design a car door spraying fixing mechanism and its control method. Summary of the Invention

[0006] To address the shortcomings of the aforementioned technologies, this invention provides an automotive door painting and fixing mechanism that can automatically perform loading and unloading operations and clamp two door corners tilted at 45° relative to the longitudinal axis, thereby reducing swaying when conveying long doors to the workstation. Furthermore, this invention discloses a control method for the automotive door painting and fixing mechanism, which automatically adjusts the door's position and fixing position throughout the entire clamping process, thus improving the efficiency of the door painting process.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] This invention provides a car door painting fixing mechanism, which includes a swing bracket, a movable bracket, a drive device, a support plate, and a clamping head. The left and right sides of the front end of the swing bracket are each connected to a first motor. The left and right sides of the top end of the swing bracket are each connected to a movable bracket via hinges. The two movable brackets are arranged opposite each other. Each movable bracket includes a movable guide rail seat and a lead screw. The front end of the movable guide rail has a first mating groove and a second mating groove, respectively. The lead screw is fitted into the first mating groove, and a drive motor for driving the lead screw is located in the second mating groove. A first fixing seat is fixedly connected to the top end of the lead screw nut. A second motor is located on the surface of the first fixing seat. The drive end of the second motor passes through the vertical end face of the first fixing seat and is connected to a connector at the end. The drive device is connected to one side of the connector. The support plate is located at the bottom end of the drive device. The clamping head is connected to the bottom end of the drive device outside one side of the support plate and forms a 45° angle with the longitudinal axis. The two clamping heads on the left and right sides of the swing bracket are located at the two ends of a straight line inclined at 45° to the longitudinal axis.

[0009] Furthermore, the swing bracket includes a first connecting rod, a second connecting rod, a first linkage rod, and a second linkage rod. The driving end of the first motor is connected to the bottom end of the first connecting rod. The top end of the first connecting rod is fixedly connected to the bottom end of the hinge through a rotating shaft. A second fixed seat is provided behind the first motor. The vertical end of the second fixed seat is connected to the bottom end of the second connecting rod through a connecting shaft. The two ends of the first linkage rod are connected to the middle section of the first and second connecting rods through a connecting shaft. The two ends of the second linkage rod are connected to the middle section of the second connecting rod through a connecting shaft. The second linkage rod is located between two second connecting rods in opposite positions.

[0010] Furthermore, the movable support also includes a third fixed base and a first cylinder. The front and rear ends of the bottom of the third fixed base are fixedly connected to the top of the hinge. The front and rear sides of the movable guide rail are provided with first connecting rods. The first connecting rods pass through the front and rear ends of the third fixed base. One end of the two first connecting rods is connected by a second connecting rod. The middle of the third fixed base is provided with a fourth fixed base extending away from the third fixed base. The first cylinder is located at one end of the fourth fixed base. The driving end of the first cylinder is connected to the second connecting rod through a drive shaft.

[0011] Furthermore, the driving device includes a support plate, a spindle seat, a second cylinder, a third motor, and a third cylinder. The support plate is L-shaped and its vertical end is fixedly connected to the connector. The spindle seat is fixed at the vertical end away from the connector. A spindle is fitted inside the spindle seat. The top of the spindle seat is provided with a second cylinder connected to the spindle. The third motor is located on one side of the spindle seat and drives the spindle. The spindle extends through to below the horizontal end of the support plate. The third cylinder is located on one side of the horizontal end and its driving end is connected to a third connecting rod. The third connecting rod extends through to below the horizontal end. The support plate is fixed to the end of the spindle below the horizontal end. The clamping head is connected to the end of the third connecting rod below the horizontal end.

[0012] Furthermore, the support plate is eccentrically connected to the bottom end of the spindle.

[0013] Furthermore, the clamping head includes an upper clamping block and a lower clamping block. The upper clamping block is fitted onto the bottom surface of the horizontal end. The end of the upper clamping block fixed to the bottom surface of the horizontal end is penetrated by a third connecting rod. The end of the lower clamping block is hinged to the bottom end of the third connecting rod. The opposite side surfaces of the upper and lower clamping blocks are provided with a plurality of clamping teeth made of soft plastic.

[0014] Furthermore, the lower clamping block hinged to the bottom end of the third connecting rod has a notch, the bottom surface of the third connecting rod has a limiting block longer than the notch, and the bottom surface of the lower clamping block has a groove for engaging with the limiting block.

[0015] The present invention also provides a control method for an automotive door spraying and fixing mechanism, the control method for the aforementioned automotive door spraying and fixing mechanism comprising the following steps:

[0016] Step 1: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism;

[0017] Step 2: The drive device moves the clamping head downwards, and the clamping head clamps the two corners of the car door that are tilted at 45° relative to the longitudinal axis.

[0018] Step 3: The first motor drives the entire swing bracket to reset;

[0019] Step 4: After spraying one side of the car door, the car door is flipped over by the drive unit, the second motor and the first cylinder.

[0020] Step 5: After spraying the other side of the car door, the clamping head is moved downward by the drive device, and the support plate supports the car door.

[0021] Step 6: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism.

[0022] Furthermore, in step two, the driving device drives the pallet to rotate clockwise by 120°~140°.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention provides an automotive door painting fixing mechanism that can automatically perform loading and unloading operations, reducing the amount of manual labor during the door painting process. Furthermore, this fixing mechanism can clamp two door corners inclined at 45° relative to the longitudinal axis, thereby reducing swaying when conveying long doors to the workstation and maintaining the door's positional stability during painting. This invention also discloses a control method for the automotive door painting fixing mechanism, which can automatically realize the loading and unloading operations of the door, the clamping and fixing of the door during the painting process, and the position adjustment of the door during the painting process, thus improving the efficiency of the door painting process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure from the front side of the fixing mechanism.

[0026] Figure 2 This is a schematic diagram of the swing support structure.

[0027] Figure 3 This is a schematic diagram of the movable support structure.

[0028] Figure 4 This is a schematic diagram of the drive device.

[0029] Figure 5 This is a schematic diagram of the clamping head structure.

[0030] Figure 6 This is a schematic diagram showing the position between the pallet and the clamping head during material loading.

[0031] Figure 7 This is a schematic diagram illustrating the control method of the car door spraying and fixing mechanism.

[0032] In the diagram, 1. Swinging bracket; 2. Moving bracket; 3. Drive device; 4. Support plate; 5. Clamping head; 6. First motor; 7. Hinge; 8. Moving guide rail seat; 9. Lead screw; 10. First mating groove; 11. Second motor; 12. Connecting piece; 13. First connecting rod; 14. Second connecting rod; 15. First linkage rod; 16. Second linkage rod; 17. Third fixed seat; 18. First cylinder; 19. First connecting rod; 20. Second connecting rod; 21. Support plate; 22. Spindle seat; 23. Second cylinder; 24. Third motor; 25. Third cylinder; 26. Spindle; 27. Third connecting rod; 28. Upper clamping block; 29. ​​Lower clamping block; 30. Clamping teeth; 31. Notch; 32. Limiting block; 33. Groove; 34. Second mating groove; 35. Drive motor. Detailed Implementation

[0033] like Figures 1-3 As shown, the present invention provides a car door painting fixing mechanism, which includes a swing bracket 1, a movable bracket 2, a drive device 3, a support plate 4, and a clamping head 5. The left and right sides of the front end of the swing bracket 1 are each connected to a first motor 6. The left and right sides of the top end of the swing bracket 1 are each connected to a movable bracket 2 via hinges 7. The two movable brackets 2 are arranged opposite to each other. Each movable bracket 2 includes a movable guide rail seat 8 and a lead screw 9. The front end of the movable guide rail is provided with a first mating groove 10 and a second mating groove 34, respectively. The lead screw 9 is fitted into the first mating groove 10, and the second mating groove 34 is provided with... A drive motor 35 with a drive screw 9 is provided. The top of the screw nut of the screw 9 is fixedly connected to a first fixed seat. A second motor 11 is provided on the surface of the first fixed seat. The drive end of the second motor 11 passes through the vertical end face of the first fixed seat and is connected to a connector 12 at the end. A drive device 3 is connected to one side of the connector 12. The support plate 4 is set at the bottom of the drive device 3. The clamping head 5 is connected to the bottom of the drive device 3 outside one side of the support plate 4 and forms an angle of 45° with the longitudinal axis. The two clamping heads 5 on the left and right sides of the swing bracket 1 are located at the two ends of a straight line inclined at 45° with the longitudinal axis.

[0034] The first motor 6 drives the swing bracket 1 to swing towards the front end of the fixed mechanism, thereby causing the moving bracket 2, drive device 3, pallet 4, and clamping head 5 to swing forward as well. The drive device 3 drives the clamping head 5 to clamp the car door. The clamping head 5 clamps the two corners of the car door that are inclined at 45° relative to the longitudinal axis, which can reduce the shaking phenomenon when the long car door is conveyed to the work station. The lead screw 9 rotates with the drive motor 35, causing the drive device 3, pallet 4, and clamping head 5 to move longitudinally on the moving guide rail seat 8. Combined with the movement of the moving bracket 2 in the lateral direction, the rotation of the drive device 3 in the lateral axis direction, and the movement of the drive device 3 in the vertical direction, the car door can be flipped, thus facilitating the spraying process on both sides of the car door.

[0035] This fixing mechanism enables automatic loading and unloading operations, reducing the amount of manual labor required during the car door painting process. Furthermore, the fixing mechanism can clamp the two corners of the car door that are tilted at 45° relative to the longitudinal axis, thereby reducing the shaking phenomenon when the long car door is conveyed to the work station and maintaining the stability of the car door position during the painting process.

[0036] like Figure 2 As shown, the swing bracket 1 includes a first connecting rod 13, a second connecting rod 14, a first linkage rod 15, and a second linkage rod 16. The driving end of the first motor 6 is connected to the bottom end of the first connecting rod 13. The top end of the first connecting rod 13 is fixedly connected to the bottom end of the hinge 7 via a rotating shaft. A second fixed seat is provided behind the first motor 6. The vertical end of the second fixed seat is connected to the bottom end of the second connecting rod 14 via a connecting shaft. The two ends of the first linkage rod 15 are connected to the middle section of the first connecting rod 13 and the second connecting rod 14 via a connecting shaft. The two ends of the second linkage rod 16 are connected to the middle section of the second connecting rod 14 via a connecting shaft. The second linkage rod 16 is located between two second connecting rods 14 in opposite positions.

[0037] When the first motor 6 drives the first link 13 to swing forward or backward, the bottom end of the second link 14 is fixed to the second fixed seat, and the first linkage rod 15 connects the first link 13 and the second link 14, as well as the second linkage rod 16 connects the first link 13 and the second link 14, so that the second link 14 produces the same action effect as the first motor 6 drives the first link 13, thereby causing the position of the swing bracket 1 to change.

[0038] like Figure 3As shown, the movable support 2 also includes a third fixed base 17 and a first cylinder 18. The front and rear ends of the bottom of the third fixed base 17 are fixedly connected to the top of the hinge 7. The front and rear sides of the movable guide rail seat 8 are provided with first connecting rods 19. The first connecting rods 19 pass through the front and rear ends of the third fixed base 17. One end of the two first connecting rods 19 is connected by a second connecting rod 20. The middle of the third fixed base 17 is provided with a fourth fixed base extending away from the third fixed base 17. The first cylinder 18 is located at one end of the fourth fixed base. The driving end of the first cylinder 18 is connected to the second connecting rod 20 through a driving shaft.

[0039] The first cylinder 18 can pull the movable guide rail seat 8 to move in the lateral direction, thereby controlling the position of the drive device 3, the pallet 4 and the clamping head 5 in the lateral direction.

[0040] like Figure 4 As shown, the driving device 3 includes a support plate 21, a spindle seat 22, a second cylinder 23, a third motor 24, and a third cylinder 25. The support plate 21 is L-shaped and its vertical end is fixedly connected to the connector 12. The spindle seat 22 is fixed at the vertical end away from the connector 12. A spindle 26 is fitted inside the spindle seat 22. The top of the spindle seat 22 is provided with a second cylinder 23 connected to the spindle 26. The third motor 24 is located on one side of the spindle seat 22 and drives the spindle 26. The spindle 26 extends through to below the horizontal end of the support plate 21. The third cylinder 25 is located on one side of the horizontal end and its driving end is connected to a third connecting rod 27. The third connecting rod 27 extends through to below the horizontal end. The support plate 4 is fixed to the end of the spindle 26 below the horizontal end. The clamping head 5 is connected to the end of the third connecting rod 27 below the horizontal end.

[0041] When the car door needs to be flipped, the drive motor 35 drives the lead screw 9 to rotate, and the nuts on the two lead screws 9 move bidirectionally in the longitudinal direction; then, the second motor 11 drives the support plate 21 to rotate, thereby realizing the overall rotation of the drive device 3; together with the movement of the moving bracket 2 in the lateral direction, the flipping operation of the car door is realized.

[0042] In addition, the main shaft 26 is driven to rotate by the third motor 24 to rotate the pallet 4; the second cylinder 23 drives the main shaft 26 to move up and down, thereby adjusting the position of the clamping head 5.

[0043] like Figure 4 and Figure 6 As shown, the tray 4 is eccentrically connected to the bottom end of the main shaft 26.

[0044] When the clamping head 5 clamps and loads the car door, the pallet 4 is rotated to a position directly below the clamping head 5 to avoid the pallet 4 affecting the clamping operation of the clamping head 5 on the car door; when the side of the car door is sprayed, the pallet 4 is rotated to a position directly below the clamping head 5 to support the car door.

[0045] like Figure 5 and Figure 6 As shown, the clamping head 5 includes an upper clamping block 28 and a lower clamping block 29. The upper clamping block 28 is fitted on the bottom surface of the horizontal end. The end of the upper clamping block 28 fixed to the bottom surface of the horizontal end is penetrated by a third connecting rod 27. The end of the lower clamping block 29 is hinged to the bottom end of the third connecting rod 27. The opposite side surfaces of the upper clamping block 28 and the lower clamping block 29 are provided with a plurality of clamping teeth 30 made of soft plastic.

[0046] The lower clamping block 29 can be moved up and down by the third connecting rod 27, which can adjust the size of the clamping opening of the clamping head 5 to adapt to the clamping requirements of different sizes of car doors; the clamping teeth 30 made of plastic will not form tooth marks on the surface of the car door when clamping the car door.

[0047] like Figure 5 As shown, the lower clamping block 29, which is hinged to the bottom end of the third connecting rod 27, has a notch 31 at its end. The bottom surface of the third connecting rod 27 has a limiting block 32 with a length longer than the notch 31. The bottom surface of the lower clamping block 29 has a groove 33 for cooperating with the limiting block 32.

[0048] When clamping the car door, since the lower clamping block 29 is the main load-bearing component and is connected to the bottom of the third connecting rod 27 by a hinge, the limiting block 32 can play a main limiting role on the lower clamping block 29, so that the lower clamping block 29 will not swing downward.

[0049] During the loading of the car door, the lower clamping block 29 moves downward continuously and contacts the surface of the car door. As the lower clamping block 29 moves downward, it is gradually lifted by the car door. When the car door is no longer in contact with the lower clamping block 29, the lower clamping block 29 returns to a horizontal state. When the lower clamping block 29 is driven upward again, it supports the car door, thus loading the car door. The loading of the car door by the lower clamping block 29 does not affect the operation in any way.

[0050] During the process of lowering the car door onto the surface of the support plate 4, the support plate 4 rotates to be located directly below the clamping block. The lower clamping block 29 moves downward continuously and contacts the surface of the support plate 4. As the lower clamping block 29 moves downward continuously, it will be gradually lifted by the support plate 4. When the support plate 4 no longer contacts the lower clamping block 29, the operation of lowering the car door onto the surface of the support plate 4 is completed. The lower clamping block 29 will not affect the operation of lowering the car door onto the surface of the support plate 4.

[0051] like Figure 7 As shown, the present invention also provides a control method for an automotive door painting and fixing mechanism, the control method for the aforementioned automotive door painting and fixing mechanism includes the following steps:

[0052] Step 1: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism;

[0053] Step 2: The clamping head is moved downward by the drive device, and the clamping head clamps the two corners of the car door that are inclined at 45° relative to the longitudinal axis.

[0054] Step 3: The first motor drives the entire swing bracket to reset.

[0055] Step four: After spraying one side of the car door, the car door is flipped over by the drive device, the second motor and the first cylinder.

[0056] Step 5: After spraying the other side of the car door, the clamping head is moved downward by the drive device, and the support plate supports the car door.

[0057] Step six: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism.

[0058] This control method can automatically realize the loading and unloading of car doors, the clamping and fixing of car doors during the painting process, and the position adjustment of car doors during the painting process, thereby improving the efficiency of car door painting.

[0059] like Figure 7 As shown, in step two, the driving device drives the pallet to rotate clockwise by 120°~140°.

[0060] The pallet is rotated 120°~140° clockwise to avoid the vehicle door during the loading process, preventing the door from colliding with the pallet and causing damage.

[0061] 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 car door painting fixing mechanism, characterized in that, The fixing mechanism includes a swing bracket, a movable bracket, a drive device, a support plate, and a clamping head. A first motor is connected to both the left and right sides of the front end of the swing bracket. Movable brackets are connected to both the left and right sides of the top end of the swing bracket via hinges. The two movable brackets are arranged opposite to each other. Each movable bracket includes a movable guide rail seat and a lead screw. The front end of the movable guide rail has a first mating groove and a second mating groove, respectively. The lead screw is fitted into the first mating groove, and a drive motor for driving the lead screw is located in the second mating groove. A first fixing seat is fixedly connected to the top of the lead screw nut. A second motor is mounted on the surface of the first fixed base. The drive end of the second motor passes through the vertical end face of the first fixed base and is connected to a connector at the end. A drive device is connected to one side of the connector. The support plate is located at the bottom end of the drive device. The clamping head is connected to the bottom end of the drive device on one side of the support plate and forms a 45° angle with the longitudinal axis. The two clamping heads on the left and right sides of the swing bracket are located at the two ends of a straight line inclined at 45° with the longitudinal axis. The drive device includes a support plate, a spindle seat, a second cylinder, a third motor, and a third cylinder. The support plate is L-shaped. Its vertical end is fixedly connected to the connector. The spindle seat is fixed at the vertical end away from the connector. A spindle is fitted inside the spindle seat. A second cylinder connected to the spindle is provided at the top of the spindle seat. A third motor is located on one side of the spindle seat and drives the spindle. The spindle extends through to below the horizontal end of the support plate. The third cylinder is located on one side of the horizontal end and its driving end is connected to a third connecting rod. The third connecting rod extends through to below the horizontal end. The support plate is fixed to the end of the spindle below the horizontal end. The clamping head is connected to the end of the third connecting rod below the horizontal end. The clamping head is eccentrically connected to the bottom end of the spindle. It includes an upper clamping block and a lower clamping block. The upper clamping block fits on the bottom surface of the horizontal end. The end of the upper clamping block fixed to the bottom surface of the horizontal end is penetrated by a third connecting rod. The end of the lower clamping block is hinged to the bottom end of the third connecting rod. The opposite side surfaces of the upper and lower clamping blocks are provided with a number of clamping teeth made of soft plastic. The end of the lower clamping block hinged to the bottom end of the third connecting rod is provided with a notch. The bottom surface of the third connecting rod is provided with a limiting block that is longer than the notch. The bottom surface of the lower clamping block is provided with a groove for engaging with the limiting block.

2. The automobile door spraying fixing mechanism according to claim 1, characterized in that, The swing bracket includes a first connecting rod, a second connecting rod, a first linkage rod, and a second linkage rod. The drive end of the first motor is connected to the bottom end of the first connecting rod. The top end of the first connecting rod is fixedly connected to the bottom end of the hinge through a rotating shaft. A second fixed seat is provided behind the first motor. The vertical end of the second fixed seat is connected to the bottom end of the second connecting rod through a connecting shaft. The two ends of the first linkage rod are connected to the middle section of the first and second connecting rods through a connecting shaft. The two ends of the second linkage rod are connected to the middle section of the second connecting rod through a connecting shaft. The second linkage rod is located between two second connecting rods in opposite positions.

3. The automobile door spraying fixing mechanism according to claim 1, characterized in that, The movable support also includes a third fixed base and a first cylinder. The front and rear ends of the bottom of the third fixed base are fixedly connected to the top of the hinge. The front and rear sides of the movable guide rail are provided with first connecting rods. The first connecting rods pass through the front and rear ends of the third fixed base. One end of the two first connecting rods is connected by a second connecting rod. The middle of the third fixed base is provided with a fourth fixed base extending away from the third fixed base. The first cylinder is located at one end of the fourth fixed base. The driving end of the first cylinder is connected to the second connecting rod through a drive shaft.

4. A control method for an automotive door painting and fixing mechanism, the control method being used in an automotive door painting and fixing mechanism as described in claims 1-3, characterized in that, The following steps are involved: Step 1: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism; Step 2: The drive device moves the clamping head downwards, and the clamping head clamps the two corners of the car door that are tilted at 45° relative to the longitudinal axis. Step 3: The first motor drives the entire swing bracket to reset; Step 4: After spraying one side of the car door, the car door is flipped over by the drive unit, the second motor and the first cylinder. Step 5: After spraying the other side of the car door, the clamping head is moved downward by the drive device, and the support plate supports the car door. Step 6: The first motor drives the entire swing bracket to swing forward towards the fixed mechanism.

5. The control method for a car door spraying and fixing mechanism according to claim 4, characterized in that, In step two, the driving device drives the pallet to rotate clockwise by 120°~140°.

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