An automatic up and down door mechanism for an automobile parts painting device

Abstract

The application discloses an automatic lifting door mechanism for an automobile accessory spraying device, and belongs to the technical field of automobile accessory spraying. The automatic lifting door mechanism for the automobile accessory spraying device comprises a spraying room, the front and rear end faces of the spraying room are fixedly connected with port mounting frames, an accessory conveying mechanism is arranged between the two port mounting frames, a plurality of automobile shell accessories are placed at the bottom of the accessory conveying mechanism, top lifting mechanisms are mounted at the top of the two port mounting frames, and bottom sealing mechanisms are arranged at the bottom of the two port mounting frames. The top customized special-shaped baffle in the top lifting mechanism and the bottom customized special-shaped baffle in the fixed sealing mechanism are designed, the overflow of paint mist can be greatly reduced during the transportation of the automobile shell accessories, the gap through which the automobile shell accessories pass is sealed by pushing the top customized special-shaped baffle downwards, and the gap is further reduced.

Description

An automatic lifting door mechanism for an automotive parts painting device Technical Field

[0001] This invention belongs to the field of automotive parts painting technology, specifically relating to an automatic lifting door mechanism for automotive parts painting devices. Background Technology

[0002] Automotive parts painting is a key surface treatment process in automobile manufacturing and repair, primarily aimed at imparting excellent corrosion resistance, aesthetics, and durability to components. A typical process includes: first, pre-treatment of metal or plastic parts, such as degreasing and phosphating, to enhance coating adhesion; then, application of a primer to provide corrosion protection and filling; next, application of a color coat to determine the final color and effect; and finally, a clear coat to ensure gloss and scratch resistance. Currently, the mainstream approach uses environmentally friendly and efficient electrostatic or automated spraying technologies to ensure uniform coating and high material utilization. After spraying, a precisely temperature-controlled drying process is required to cure the paint film. This process is widely used for interior and exterior parts such as body panels, bumpers, and wheels, directly affecting the overall appearance quality and lifespan of the vehicle.

[0003] Through project research, it was found that conventional automatic painting equipment for automotive parts has an open structure at the workpiece inlet and outlet during the painting process. To prevent paint mist from overflowing during painting, a large amount of fresh air needs to be supplied from outdoors to suppress the overflow of paint mist. This necessitates the selection of a more powerful fan to meet the air volume circulation requirements, resulting in increased operating costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automatic lifting door mechanism for an automotive parts spraying device.

[0005] The technical solution adopted to solve the above technical problems is: to provide an automatic lifting door mechanism for an automotive parts spraying device, including a spraying room, wherein port mounting frames are fixedly connected to both the front and rear ends of the spraying room, and a parts transmission mechanism is provided between the two port mounting frames;

[0006] The bottom of the accessory transmission mechanism is equipped with multiple car body accessories, the top of the two port mounting frames is equipped with a top lifting mechanism, and the bottom of the two port mounting frames is equipped with a bottom sealing mechanism.

[0007] Preferably, the accessory transmission mechanism includes two transmission frames, with multiple sets of hollow square tubes fixedly connected to the bottom of the two transmission frames. Multiple extension rods are installed at the bottom of each set of hollow square tubes, and support blocks are fixedly connected to the bottom of each extension rod.

[0008] Through the above technical solution, during the spraying process, automotive body parts are continuously placed between multiple support blocks in the parts transfer mechanism. The linkage mechanism in the transfer frame drives multiple sets of hollow square tubes to move, and then multiple extension rods and multiple support blocks drive the automotive body parts into the interior of the spraying room for spraying in sequence.

[0009] Preferably, the top lifting mechanism includes two drive cylinders installed on both sides of the port mounting frame. A first side support plate is installed on the top of each of the two drive cylinders. A top baffle is fixedly connected between the two first side support plates. A top custom-shaped baffle is installed at the bottom of the top baffle. A plurality of first bolt assemblies are installed between the top baffle and the top custom-shaped baffle.

[0010] With the above technical solution, during installation, two drive cylinders work together to quickly push the top baffle upward through the first side support plate, thereby moving the top customized irregular baffle to a specified height. The top baffle and the top customized irregular baffle are then installed and fixed by multiple first bolt assemblies.

[0011] Preferably, the top custom-shaped baffle has openings corresponding to the accessory transfer mechanism and the automotive body accessory.

[0012] The above technical solution ensures that the parts transfer mechanism and the car body parts can pass smoothly through the top lifting mechanism.

[0013] Preferably, the bottom sealing mechanism is a fixed sealing mechanism, which includes a bottom solid baffle fixedly connected to the bottom inner surface of the port mounting frame, a bottom custom-shaped baffle on the top of the bottom solid baffle, and a plurality of second bolt assemblies between the bottom solid baffle and the bottom custom-shaped baffle.

[0014] Through the above technical solution, the bottom solid baffle and the bottom custom-shaped baffle are installed and fixed by multiple second bolt assemblies. When the car body parts enter, the two drive cylinders work together to quickly push the top baffle upward through the first side support plate, opening the gap between the top and bottom custom-shaped baffles. The car body parts move continuously into the painting booth. The irregular structure formed by the top and bottom custom-shaped baffles can not only meet the transportation needs of the car body parts, but also effectively reduce the opening for painting and avoid most of the paint mist overflow.

[0015] Preferably, the bottom sealing mechanism is a lifting sealing mechanism, which includes a bottom storage baffle fixedly connected to the inner surface of the bottom of the port mounting frame, a bottom lifting baffle slidably connected to the top of the bottom storage baffle, a support bar fixedly connected to both ends of the bottom storage baffle, a second side support plate fixedly connected to both sides of the support bar, circumferential blocks fixedly connected to both ends of the top of the support bar, a rotating baffle rotatably connected between the two circumferential blocks, a support shaft block fixedly connected to both ends of the bottom of the rotating baffle, a connecting sleeve fixedly connected to both sides of the bottom of the rotating baffle, a square groove round sleeve provided on the inner wall of the connecting sleeve, a torsion spring installed between the inner wall of the connecting sleeve and the outer wall of the square groove round sleeve, a limit screw screw spirally connected to one end of the connecting sleeve, and a drive motor installed on the top of one side of the support bar.

[0016] With the above technical solution, when the car body parts first enter, the drive motor drives the rotating baffle to rotate, and it continues to rotate as the car body parts enter until the rotating baffle is in a horizontal structure. At this time, the customized rotating sealing plate assembly that rotates with it is in a vertical state, sealing the opening at the bottom of the car body parts and reducing the opening area.

[0017] Preferably, the top of the support bar has an arc-shaped recessed structure, and multiple through holes are provided on both of the second side support plates. The bottom of the rotating baffle has a cylindrical structure.

[0018] Through the above technical solution, the arc-shaped concave structure can fit into the cylindrical structure at the bottom of the rotating baffle, reducing the gap. The through hole of the second side support plate is used to pass through the adjustment support mechanism, thereby realizing the support by adjusting the support mechanism.

[0019] Preferably, both sides of the port mounting frame are slidably connected to an adjustment support mechanism, and a customized rotating sealing plate assembly is installed on the lifting sealing mechanism.

[0020] The above technical solution allows for the adjustment of the height of some components in the lifting and blocking mechanism and the customized rotating blocking plate assembly by adjusting the support mechanism.

[0021] Preferably, the adjusting support mechanism includes an I-shaped lifting plate slidably connected to one side of the port mounting frame. Two limiting rods and a threaded rod are fixedly connected to the top of the I-shaped lifting plate. A threaded sleeve is screwed onto the threaded rod, and the cross-section of the threaded sleeve is an I-shaped structure. Two positioning pins are provided between the I-shaped lifting plate and the port mounting frame.

[0022] Through the above technical solution, different customized rotating sealing plate assemblies are selected for different car body parts. Then, the height of the I-shaped lifting plate on the port mounting frame can be changed and fixed by the positioning pin, thereby adjusting the height of the bottom lifting baffle. Then, the second side support plate can be finely adjusted by the threaded sleeve, so that the top of the customized rotating sealing plate assembly can minimize the gap without affecting the passage of the car body parts.

[0023] Preferably, the customized rotating sealing plate assembly includes two limiting square bars, and an integral connecting round rod is fixedly connected between the two limiting square bars. A rotating customized irregular baffle is fixedly connected to the outer wall of the integral connecting round rod.

[0024] With the above technical solution, after the car body parts are fully inserted, two drive cylinders drive the top customized irregular baffle to descend, thereby limiting the rotation of the customized irregular baffle and closing the opening gap through which the car body parts pass. Subsequently, the drive motor drives the rotating baffle to rotate and reset. However, since the rotating customized irregular baffle is limited, the torsion spring is compressed through the integrated connecting round rod, limiting square bar, and square groove round sleeve until the rotating baffle completely blocks the top customized irregular baffle. At this point, it resets to a vertical state, and the two drive cylinders drive the top customized irregular baffle to rise and reset. The rotated customized irregular baffle, now freed from restriction, resets to a horizontal state under the action of the two torsion springs, thus avoiding an excessively large opening during the reset process. The same cycle is repeated after the next car body part enters.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) By designing a top custom-shaped baffle in the top lifting mechanism and a bottom custom-shaped baffle in the fixed sealing mechanism, the present invention can greatly reduce the overflow of paint mist during the transportation of automotive body parts. At the same time, the replaceable top custom-shaped baffle and bottom custom-shaped baffle can be customized according to different automotive parts, further reducing the gaps during transportation. Meanwhile, the drive cylinder in the top lifting mechanism can push the top custom-shaped baffle down during the spraying process to seal the gaps through which the automotive body parts pass, further reducing the gaps.

[0027] (2) This invention designs a lifting and blocking mechanism, an adjusting support mechanism and a customized rotating blocking plate assembly. As the car body parts enter, the rotating baffle rotates continuously until it is in a horizontal position. At this time, the customized rotating blocking plate assembly is in a vertical position to block the opening at the bottom of the car body parts, reducing the opening area. After the parts are fully inserted, the top customized irregular baffle descends to limit the rotating customized irregular baffle and block the entry opening of the car body parts. Then, the drive motor drives the rotating baffle to rotate and reset. However, since the rotating customized irregular baffle is limited, the torsion spring is compressed until the rotating baffle is completely blocked. Then, the top customized irregular baffle rises and resets. The rotating customized irregular baffle, which is now freed from the restriction, is reset to a horizontal position, minimizing the opening size during the reset process. Attached Figure Description

[0028] Figure 1 is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention;

[0029] Figure 2 is a three-dimensional cross-sectional structural diagram of Embodiment 1 of the present invention;

[0030] Figure 3 is a schematic diagram of the fixed sealing mechanism of the present invention;

[0031] Figure 4 is an exploded structural diagram of the top lifting mechanism and the fixed sealing mechanism of the present invention;

[0032] Figure 5 is a schematic diagram of the accessory transfer mechanism of the present invention;

[0033] Figure 6 is a three-dimensional structural schematic diagram of Embodiment 2 of the present invention;

[0034] Figure 7 is a schematic diagram of the lifting and blocking mechanism of the present invention;

[0035] Figure 8 is a three-dimensional structural diagram of the lifting and blocking mechanism, the adjusting support mechanism and the customized rotating blocking plate assembly of the present invention.

[0036] Figure 9 is a magnified view of part A in Figure 8;

[0037] Figure 10 is a partial structural diagram of the lifting and blocking mechanism of the present invention;

[0038] Figure 11 is a schematic diagram of the three-dimensional cross-sectional structure of the rotating baffle in the horizontal state of the present invention;

[0039] Figure 12 is a schematic diagram of the rotating structure of the rotating baffle and customized rotating sealing plate assembly of the present invention.

[0040] Reference numerals: 1. Spray painting booth; 2. Port mounting frame; 3. Accessory transfer mechanism; 301. Transfer frame; 302. Hollow square tube; 303. Extension rod; 304. Support block; 4. Automotive body accessory; 5. Top lifting mechanism; 501. Drive cylinder; 502. First side support plate; 503. Top baffle; 504. Custom-made top baffle; 505. First bolt assembly; 6. Bottom sealing mechanism; 60. Fixed sealing mechanism; 6001. Bottom solid baffle; 6002. Custom-made bottom baffle; 6003. Second bolt assembly; 61. Lifting sealing mechanism; 6101. Bottom storage baffle 6102. Bottom lifting baffle; 6103. Support bar; 6104. Second side support plate; 6105. Circumferential block; 6106. Rotating baffle; 6107. Support shaft block; 6108. Connecting sleeve; 6109. Square groove round sleeve; 6110. Torsion spring; 6111. Limiting screw; 6112. Drive motor; 7. Adjusting support mechanism; 701. I-shaped lifting plate; 702. Limiting rod; 703. Threaded rod; 704. Threaded sleeve; 705. Positioning pin; 8. Customized rotating sealing plate assembly; 801. Limiting square bar; 802. Integrated connecting round rod; 803. Rotating customized irregular baffle. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0042] Example 1:

[0043] As shown in Figures 1-5, an automatic lifting door mechanism for an automotive parts painting device according to this embodiment includes a painting booth 1. Port mounting frames 2 are fixedly connected to both the front and rear ends of the painting booth 1. A parts transfer mechanism 3 is provided between the two port mounting frames 2. The parts transfer mechanism 3 includes two transfer frames 301. Multiple sets of hollow square tubes 302 are fixedly connected to the bottom of the two transfer frames 301. Multiple extension rods 303 are installed at the bottom of each set of hollow square tubes 302. Support blocks 304 are fixedly connected to the bottom of each extension rod 303. During painting, automotive body parts 4 are continuously placed between the multiple support blocks 304 in the parts transfer mechanism 3. The linkage mechanism in the transfer frames 301 drives the multiple sets of hollow square tubes 302 to move, thereby driving the automotive body parts 4 to sequentially enter the interior of the painting booth 1 for painting via the multiple extension rods 303 and the multiple support blocks 304.

[0044] As shown in Figures 1-5, multiple automotive body parts 4 are placed at the bottom of the parts transfer mechanism 3. A top lifting mechanism 5 is installed on the top of each of the two port mounting frames 2. The top lifting mechanism 5 includes two drive cylinders 501 installed on both sides of the port mounting frame 2. A first side support plate 502 is installed on the top of each of the two drive cylinders 501. A top baffle 503 is fixedly connected between the two first side support plates 502. A custom-shaped top baffle 504 is installed at the bottom of the top baffle 503. A connection is made between the top baffle 503 and the custom-shaped top baffle 504. There are multiple first bolt assemblies 505. During installation, two drive cylinders 501 work together to quickly push the top baffle 503 upward through the first side support plate 502, thereby moving the top custom-shaped baffle 504 to a specified height. The top baffle 503 and the top custom-shaped baffle 504 are installed and fixed by the multiple first bolt assemblies 505. The top custom-shaped baffle 504 has openings corresponding to the accessory transmission mechanism 3 and the car body accessory 4, ensuring that the accessory transmission mechanism 3 and the car body accessory 4 can pass smoothly through the top lifting mechanism 5.

[0045] As shown in Figures 1-5, both port mounting frames 2 are equipped with bottom sealing mechanisms 6. The bottom sealing mechanism 6 is a fixed sealing mechanism 60, which includes a bottom solid baffle 6001 fixedly connected to the inner surface of the bottom of the port mounting frame 2. A custom-shaped bottom baffle 6002 is provided on the top of the bottom solid baffle 6001. Multiple second bolt assemblies 6003 are provided between the bottom solid baffle 6001 and the custom-shaped bottom baffle 6002, thereby securing the bottom solid baffle 6001 and the custom-shaped bottom baffle 6002 together. When the custom-shaped baffle 6002 is installed and fixed, and the car body accessory 4 enters, the two drive cylinders 501 work together to quickly push the top baffle 503 upward through the first side support plate 502, so that the gap between the top custom-shaped baffle 504 and the bottom custom-shaped baffle 6002 opens. The car body accessory 4 moves continuously into the paint booth 1. The custom-shaped structure formed by the top custom-shaped baffle 504 and the bottom custom-shaped baffle 6002 can effectively reduce the opening of the paint spraying while meeting the transportation requirements of the car body accessory 4, and avoid most of the paint mist overflow.

[0046] Example 2:

[0047] As shown in Figures 1-11, the difference from Embodiment 1 is that the bottom sealing mechanism 6 is a lifting sealing mechanism 61. The lifting sealing mechanism 61 includes a bottom receiving baffle 6101 fixedly connected to the inner surface of the bottom of the port mounting frame 2. A bottom lifting baffle 6102 is slidably connected to the top of the bottom receiving baffle 6101. Support bars 6103 are fixedly connected to the top of the bottom lifting baffle 6102 at both ends of the bottom receiving baffle 6101. Support bars 6103 are fixedly connected to the top of the bottom lifting baffle 6102 on both sides of the support bars 6103. Each support bar 6103 is fixedly connected to a second side support plate 6104. Circular blocks 6105 are fixedly connected to both ends of the top of the support bar 6103. A rotating baffle 6106 is rotatably connected between the two circular blocks 6105. Support shaft blocks 6107 are fixedly connected to both ends of the bottom of the rotating baffle 6106. Connecting sleeves 6108 are fixedly connected to both sides of the bottom of the rotating baffle 6106. A square groove circular sleeve 6109 is provided on the inner wall of the connecting sleeve 6108. The inner wall of the connecting sleeve 6108 and the square groove circular sleeve... A torsion spring 6110 is installed between the outer walls of the sleeve 6109. One end of the sleeve 6108 is screwed with a limit screw 6111. A drive motor 6112 is installed on the top of one side of the support bar 6103. When the car body accessory 4 first enters, the drive motor 6112 drives the rotating baffle 6106 to rotate. As the car body accessory 4 enters, it rotates continuously until the rotating baffle 6106 is in a horizontal structure. At this time, the customized rotating sealing plate assembly 8, which rotates with it, is in a vertical state, sealing the opening at the bottom of the car body accessory 4 and reducing the opening area. The top of the support bar 6103 is an arc-shaped concave structure. Multiple through holes are opened on both second side support plates 6104. The bottom of the rotating baffle 6106 is a cylindrical structure. The arc-shaped concave structure allows it to fit the cylindrical structure at the bottom of the rotating baffle 6106, reducing the gap. The through holes of the second side support plate 6104 are used to pass through the adjustment support mechanism 7, thereby realizing the support through the adjustment support mechanism 7.

[0048] As shown in Figures 1-10, both sides of the port mounting frame 2 are slidably connected to an adjustment support mechanism 7. The adjustment support mechanism 7 includes an I-shaped lifting plate 701 slidably connected to one side of the port mounting frame 2. The top of the I-shaped lifting plate 701 is fixedly connected to two limiting rods 702 and a threaded rod 703. A threaded sleeve 704 is screwed onto the threaded rod 703, and the cross-section of the threaded sleeve 704 is an I-shaped structure. Two positioning pins 705 are provided between the I-shaped lifting plate 701 and the port mounting frame 2. Different customized rotating sealing plate assemblies 8 are selected for different automotive body parts 4. Then, the height of the I-shaped lifting plate 701 on the port mounting frame 2 can be changed and fixed by the positioning pins 705, thereby adjusting the height of the bottom lifting baffle 6102. Then, the second side support plate 6104 is finely adjusted by the threaded sleeve 704 so that the top of the customized rotating sealing plate assembly 8 can minimize the gap without affecting the passage of the automotive body parts 4.

[0049] As shown in Figures 1-12, a customized rotating sealing plate assembly 8 is installed on the lifting sealing mechanism 61. The height of some components in the lifting sealing mechanism 61 and the customized rotating sealing plate assembly 8 can be adjusted by adjusting the support mechanism 7. The customized rotating sealing plate assembly 8 includes two limiting square bars 801, and an integral connecting round rod 802 is fixedly connected between the two limiting square bars 801. A rotating customized irregular baffle 803 is fixedly connected to the outer wall of the integral connecting round rod 802. After the car body accessory 4 is fully inserted, two drive cylinders 501 drive the top customized irregular baffle 504 to descend, thereby limiting the rotating customized irregular baffle 803 and closing the opening through which the car body accessory 4 passes. The gap is then cleared, and the drive motor 6112 drives the rotating baffle 6106 to rotate and reset. However, since the rotating custom-shaped baffle 803 is limited, the torsion spring 6110 is compressed through the integrated connecting round rod 802, the limiting square bar 801, and the square groove round sleeve 6109 until the rotating baffle 6106 completely blocks the top custom-shaped baffle 504. At this time, it is reset to a vertical state, and the two drive cylinders 501 drive the top custom-shaped baffle 504 to rise and reset. The rotating custom-shaped baffle 803, which is released from the restriction, is reset to a horizontal state under the action of the two torsion springs 6110, thereby avoiding the opening being too large during the reset process. The same cycle operation is carried out after the next car body part 4 enters.

[0050] The working principle of this embodiment is as follows: Before spraying, select the appropriate top custom-shaped baffle 504 and bottom custom-shaped baffle 6002, or the top custom-shaped baffle 504 and custom rotating sealing plate assembly 8, according to the accessories to be sprayed. During installation, the two drive cylinders 501 work together to quickly push the top baffle 503 upward through the first side support plate 502, thereby moving the top custom-shaped baffle 504 to the specified height. The top baffle 503 is then secured by multiple first bolt assemblies 505. The top custom-shaped baffle 504 is installed and fixed. The bottom solid baffle 6001 and the bottom custom-shaped baffle 6002 are installed and fixed by multiple second bolt assemblies 6003. When installing the custom rotating sealing plate assembly 8, two limiting square bars 801 are inserted into the two square groove round sleeves 6109 respectively. Then, the two limiting screws 6111 are rotated to make the whole custom rotating sealing plate assembly 8 in the center position, and the whole custom rotating sealing plate assembly 8 and the rotating baffle 6106 are in a vertical state.

[0051] During the painting process, automotive body parts 4 are continuously placed between multiple support blocks 304 in the parts transfer mechanism 3. The linkage mechanism in the transfer frame 301 drives multiple sets of hollow square tubes 302 to move, and then the automotive body parts 4 are driven into the interior of the painting booth 1 for painting through multiple extension rods 303 and multiple support blocks 304.

[0052] In Embodiment 1, when the car body accessory 4 enters, the two drive cylinders 501 work together to quickly push the top baffle 503 upward through the first side support plate 502, opening the gap between the top custom-shaped baffle 504 and the bottom custom-shaped baffle 6002. The car body accessory 4 continuously moves into the paint booth 1. The irregular structure formed by the top custom-shaped baffle 504 and the bottom custom-shaped baffle 6002 can effectively reduce the opening for painting while meeting the transportation requirements of the car body accessory 4, thus avoiding most of the paint mist overflow. After the car body accessory 4 has fully entered, the two drive cylinders 501 drive the top custom-shaped baffle 504 to descend and reset, sealing the gap.

[0053] In Embodiment 2, when the car body component 4 initially enters, the drive motor 6112 drives the rotating baffle 6106 to rotate. As the car body component 4 enters, it continues to rotate until the rotating baffle 6106 reaches a horizontal position. At this point, the custom-designed rotating sealing plate assembly 8, which rotates accordingly, becomes vertical, sealing the opening at the bottom of the car body component 4 and reducing the opening area. After complete entry, the two drive cylinders 501 drive the top custom-designed baffle 504 to descend, thereby limiting the rotation of the custom-designed baffle 803. Subsequently, the drive motor 6112 drives the rotating baffle 6106 to rotate and reset. However, since the rotating custom-shaped baffle 803 is limited, the torsion spring 6110 is compressed by the integrated connecting round rod 802, the limiting square bar 801 and the square groove round sleeve 6109 until the rotating baffle 6106 completely blocks the top custom-shaped baffle 504. At this time, it is reset to a vertical state, and the two drive cylinders 501 drive the top custom-shaped baffle 504 to rise and reset. The rotating custom-shaped baffle 803, which is freed from restriction, is reset to a horizontal state under the action of the two torsion springs 6110, thereby avoiding the opening being too large during the reset process. The same cycle operation is carried out after the next car body part 4 enters.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An automatic lifting door mechanism for an automotive parts painting device, comprising a painting booth (1), characterized in that: The front and rear ends of the spray booth (1) are fixedly connected to port mounting frames (2), and a parts transfer mechanism (3) is provided between the two port mounting frames (2); multiple car body parts (4) are placed at the bottom of the parts transfer mechanism (3), and a top lifting mechanism (5) is installed on the top of the two port mounting frames (2). The top lifting mechanism (5) includes two drive cylinders (501) installed on both sides of the port mounting frame (2). A first side support plate (502) is installed on the top of the two drive cylinders (501), and a top baffle (503) is fixedly connected between the two first side support plates (502). A top custom-shaped baffle (504) is installed at the bottom of the top baffle (503). 3) Multiple first bolt assemblies (505) are installed between the top custom-shaped baffle (504). The top custom-shaped baffle (504) has openings corresponding to the accessory transmission mechanism (3) and the car body accessory (4). The bottom of the two port mounting frames (2) is provided with a bottom sealing mechanism (6). The bottom sealing mechanism (6) is a lifting sealing mechanism (61). A custom rotating sealing plate assembly (8) is installed on the lifting sealing mechanism (61). The custom rotating sealing plate assembly (8) includes two limiting square bars (801). An integral connecting round rod (802) is fixedly connected between the two limiting square bars (801). A rotating custom-shaped baffle (803) is fixedly connected to the outer wall of the integral connecting round rod (802).

2. The automatic lifting door mechanism for an automotive parts painting device according to claim 1, characterized in that, The accessory transmission mechanism (3) includes two transmission frames (301), and multiple sets of hollow square tubes (302) are fixedly connected to the bottom of the two transmission frames (301). Multiple extension rods (303) are installed at the bottom of each set of hollow square tubes (302), and support blocks (304) are fixedly connected to the bottom of each extension rod (303).

3. The automatic lifting door mechanism for an automotive parts painting device according to claim 1, characterized in that, The lifting and blocking mechanism (61) includes a bottom storage baffle (6101) fixedly connected to the bottom inner surface of the port mounting frame (2). A bottom lifting baffle (6102) is slidably connected to the top of the bottom storage baffle (6101). A support bar (6103) is fixedly connected to the top of the bottom lifting baffle (6102). A second side support plate (6104) is fixedly connected to both sides of the support bar (6103). Circular blocks (6105) are fixedly connected to both ends of the top of the support bar (6103). A rotating baffle (6105) is rotatably connected between the two circular blocks (6105). 06), the bottom ends of the rotating baffle (6106) are fixedly connected to the support shaft blocks (6107), and the bottom sides of the rotating baffle (6106) are fixedly connected to the connecting sleeves (6108). The inner wall of the connecting sleeves (6108) is provided with a square groove round sleeve (6109). A torsion spring (6110) is installed between the inner wall of the connecting sleeves (6108) and the outer wall of the square groove round sleeve (6109). One end of the connecting sleeves (6108) is spirally connected to a limit screw (6111). A drive motor (6112) is installed on the top of one side of the support bar (6103).

4. The automatic lifting door mechanism for an automotive parts painting device according to claim 3, characterized in that, The top of the support bar (6103) is an arc-shaped recessed structure, and multiple through holes are provided on both of the second side support plates (6104). The bottom of the rotating baffle (6106) is a cylindrical structure.

5. The automatic lifting door mechanism for an automotive parts painting device according to claim 1, characterized in that, Both sides of the port mounting frame (2) are slidably connected to an adjustment support mechanism (7).

6. The automatic lifting door mechanism for an automotive parts painting device according to claim 5, characterized in that, The adjustment support mechanism (7) includes an I-shaped lifting plate (701) slidably connected to one side of the port mounting frame (2). The top of the I-shaped lifting plate (701) is fixedly connected to two limiting rods (702) and a threaded rod (703). A threaded sleeve (704) is screwed onto the threaded rod (703), and the cross-section of the threaded sleeve (704) is an I-shaped structure. Two positioning pins (705) are provided between the I-shaped lifting plate (701) and the port mounting frame (2).

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