A multi-directional automatic reciprocating spraying device

Abstract

This application relates to the field of spraying equipment technology and discloses a multi-directional automatic reciprocating spraying device, including a base. A conveyor trough is provided on the top of the base, and a conveyor belt is rotatably installed within the trough. A gantry is fixedly installed on the top of the base, and a spraying mechanism is mounted on the gantry. The spraying mechanism includes a crossbeam, a slide, a U-shaped plate, two L-shaped suspension rods, a transverse spray pipe, multiple nozzles, a spraying range adjustment assembly, a paint conveying assembly, and a reciprocating drive assembly. This application has the following advantages and effects: it can flexibly adjust the number of nozzles used according to the size of the automotive trim panel, achieving flexible and adjustable spraying range to accommodate different sizes of automotive trim panels. Furthermore, during the spraying process, it can control multiple nozzles to perform reciprocating linear motion, ensuring uniform and comprehensive spraying of paint onto the surface of the automotive trim panel, resulting in consistent paint thickness and improved spraying quality.

Description

Technical Field

[0001] This application relates to the field of spraying equipment technology, and in particular to a multi-directional automatic reciprocating spraying device. Background Technology

[0002] In the automobile manufacturing process, automotive trim panels are an essential component. These panels include interior trim panels and exterior trim panels, and their function is generally to enhance the safety, appearance, and comfort of the vehicle. For these trim panels, the coating primarily serves decorative, protective, insulating, and anti-oxidation purposes, all of which require a durable paint or other coating. Therefore, spraying equipment is necessary when applying the coating to automotive trim panels.

[0003] In existing technologies, traditional spraying devices mostly use fixed nozzle arrays. Because there is a certain gap between adjacent nozzles, inconsistent paint thickness on the automotive trim panel surface can easily occur, resulting in poor spraying quality. Furthermore, since the nozzle positions are fixed, the spraying range cannot be flexibly adjusted. When spraying automotive trim panels of different widths, for example, when spraying narrower trim panels, nozzles located at the edges continue to spray paint, causing paint waste. Therefore, these devices cannot meet the spraying needs of automotive trim panels of different sizes.

[0004] Therefore, we propose a multi-directional automatic reciprocating spraying device to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a multi-directional automatic reciprocating spraying device, which achieves flexible and adjustable spraying range, can adapt to different sizes of automotive trim panels, and ensures uniform and comprehensive spraying of paint liquid on the surface of automotive trim panels, with consistent paint liquid thickness, thereby improving the spraying quality.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a multi-directional automatic reciprocating spraying device, including a base, a conveying groove on the top of the base, a conveyor belt rotatably installed in the conveying groove, a gantry frame fixedly installed on the top of the base, a spraying mechanism installed on the gantry frame, the spraying mechanism including a crossbeam, a slide block, a U-shaped plate, two L-shaped suspension rods, a transverse spray pipe, multiple nozzles, a spraying range adjustment assembly, a paint conveying assembly, and a reciprocating drive assembly, the crossbeam being fixedly installed inside the gantry frame, the slide block being slidably fitted onto the crossbeam, the U-shaped plate being fixedly installed at the bottom of the slide block, and the two L-shaped suspension rods being... All hangers are fixedly installed at the bottom of the U-shaped plate. The horizontal spray pipe is fixedly installed on two L-shaped hangers. Both ends of the horizontal spray pipe are open. Multiple nozzles are fixedly connected to the bottom outer wall of the horizontal spray pipe and are distributed at equal intervals. The spray range adjustment assembly includes two plugs, two horizontal connecting rods and two vertical plates. The two plugs are slidably installed inside the horizontal spray pipe. The two horizontal connecting rods are fixedly installed on the opposite sides of the two plugs. The opposite ends of the two horizontal connecting rods extend to the outside of the horizontal spray pipe. The two vertical plates are fixedly installed on the opposite ends of the two horizontal connecting rods.

[0007] By adopting the above technical solution, the conveyor belt is used to horizontally and linearly transport panels such as automotive trim panels that require spraying treatment. With the coordinated action of multiple nozzles, paint liquid can be sprayed onto the surface of the automotive trim panels from multiple directions, ensuring the comprehensiveness of the spraying on the surface of the automotive trim panels.

[0008] A further feature of this application is that: clearance holes are provided on both the left and right side walls of the gantry frame, and the two ends of the U-shaped plate pass through the corresponding clearance holes.

[0009] By adopting the above technical solution, it is ensured that the U-shaped plate will not come into contact with the gantry during horizontal movement.

[0010] A further configuration of this application is as follows: the spraying range adjustment assembly further includes a bearing seat, a bidirectional lead screw, and a motor. The bearing seat is fixedly installed on the inner left side of the U-shaped plate, the left end of the bidirectional lead screw is rotatably connected to the bearing seat, the motor is fixedly installed on the outer right side of the U-shaped plate, the output shaft end of the motor is fixedly connected to the right end of the bidirectional lead screw, and the two vertical plates are threaded onto the bidirectional lead screw and are arranged symmetrically.

[0011] By adopting the above technical solution, the two plugs can be controlled to move synchronously towards or away from each other in the transverse spray pipe by using a motor to drive the bidirectional lead screw to rotate. This allows for adjustment of the distance between the two plugs, changing the number of nozzles between the two plugs, and thus changing the effective spraying length. As a result, the spraying range can be flexibly adjusted to meet the needs of different sized automotive trim panels.

[0012] A further feature of this application is that a horizontal guide rod is fixedly installed inside the U-shaped plate, and both vertical plates are slidably sleeved on the horizontal guide rod.

[0013] By adopting the above technical solution, it is ensured that the plug moves smoothly and steadily within the transverse nozzle.

[0014] A further feature of this application is that: a horizontal indicator rod is fixedly installed on one side of each of the two vertical plates that are close to each other, and both horizontal indicator rods are located above the horizontal nozzle. The horizontal indicator rods and the horizontal connecting rods are of the same length.

[0015] By adopting the above technical solution, the position of the plug in the horizontal spray pipe can be intuitively determined, which makes it easier for operators to quickly confirm the current spray width and reduce debugging time.

[0016] A further provision of this application is that a wear-resistant sealing scraper ring is fixedly sleeved on the outer wall of the plug, the wear-resistant sealing scraper ring slides and seals with the inner wall of the transverse spray pipe, and limit blocks are fixedly installed on the inner walls of both ends of the transverse spray pipe.

[0017] By adopting the above technical solution and using a wear-resistant sealing scraper ring, it is possible to prevent paint from leaking from the gap between the plug and the inner wall of the transverse spray pipe, and to scrape off the residual paint on the inner wall of the transverse spray pipe during movement, further preventing paint leakage. By using a limiting block, the movement stroke of the plug can be blocked and limited to prevent the plug from moving out of the transverse spray pipe.

[0018] A further configuration of this application is as follows: the paint delivery assembly includes a paint container, a delivery pump, a suction pipe, a discharge pipe, a corrugated delivery hose, and an inlet pipe. The paint container and the delivery pump are both fixedly installed on the top of the gantry. One end of the suction pipe is fixedly connected to the suction end of the delivery pump, and the other end of the suction pipe extends into the paint container. One end of the discharge pipe is fixedly connected to the discharge end of the delivery pump. One end of the corrugated delivery hose is fixedly connected to the other end of the discharge pipe. The corrugated delivery hose is located behind the gantry. One end of the inlet pipe is fixedly connected to the other end of the corrugated delivery hose, and the other end of the inlet pipe is fixedly connected to the middle part of the transverse spray pipe.

[0019] By adopting the above technical solution, the paint container is used to hold the paint liquid and other coatings required for spraying. The paint liquid in the paint container can be pumped out by the delivery pump, so that the paint liquid is sprayed downward from multiple nozzles.

[0020] A further feature of this application is that the top of the paint container is provided with a feeding hole, and an end cap is threaded into the feeding hole.

[0021] By adopting the above technical solution, it is convenient to add paint liquid into the paint container.

[0022] A further configuration of this application is as follows: the reciprocating drive assembly includes a second motor, a disc, and a swing arm. The second motor is fixedly installed on the top inner wall of the gantry frame, the disc is fixedly installed on the output shaft end of the second motor, one end of the swing arm is rotatably connected to the bottom of the disc through a first pin, the axis of the first pin does not coincide with the center of the disc, and the other end of the swing arm is rotatably connected to the top of the slide through a second pin.

[0023] By adopting the above technical solution, motor 2 is used to drive the disc to rotate, and the swing arm drives the slide to make reciprocating linear motion on the crossbeam. This allows the horizontal spray pipe and multiple nozzles to follow the reciprocating linear motion, ensuring that the nozzles can uniformly and comprehensively spray paint onto the surface of the car trim panel, resulting in a consistent paint thickness and improved spraying quality.

[0024] A further feature of this application is that electric telescopic rods are fixedly installed on both the left and right side walls of the gantry frame, and guide limiting plates are fixedly installed on the output shaft ends of the two electric telescopic rods, with the two guide limiting plates located above the conveyor belt.

[0025] By adopting the above technical solution, under the synergistic effect of the two guide limiting plates, the automotive trim panel can be ensured not to shift during the horizontal linear conveying process. It can accurately pass through the spraying area below the nozzle, ensuring the effectiveness of spraying and preventing spraying misalignment caused by deviation. The distance between the two guide limiting plates can be adjusted using two electric telescopic rods, which is suitable for linear guiding and conveying automotive trim panels of different sizes.

[0026] This application includes at least one of the following beneficial technical effects:

[0027] 1. With the synergistic effect of multiple nozzles, this application can spray paint liquid onto the surface of automotive trim panels from multiple directions, ensuring the comprehensiveness of the coating. By designing a spray range adjustment component, the number of nozzles used can be flexibly adjusted according to the size of the automotive trim panel, achieving flexible and adjustable spray range, which can meet the needs of automotive trim panels of different sizes.

[0028] 2. This application designs a reciprocating drive component that can control multiple nozzles to perform reciprocating linear motion, ensuring uniform and comprehensive spraying of paint liquid onto the surface of the automotive trim panel, resulting in consistent paint liquid thickness and improved spraying quality.

[0029] 3. With the combined action of two electric telescopic rods and two guide limit plates, this application can be used to guide and transport automotive trim panels of different sizes in a straight line, ensuring the effectiveness of spraying on the surface of automotive trim panels and preventing spraying misalignment caused by offset. Attached Figure Description

[0030] Figure 1 This is a front-view stereoscopic structural diagram of this embodiment.

[0031] Figure 2 This is a schematic diagram of the right-side stereoscopic structure of this embodiment.

[0032] Figure 3 This is a front-view three-dimensional structural diagram of the spraying mechanism.

[0033] Figure 4 This is a rear-view three-dimensional structural diagram of the spraying mechanism.

[0034] Figure 5 This is a schematic diagram of the front sectional view of the transverse nozzle.

[0035] In the diagram, 1. base; 2. conveyor trough; 3. conveyor belt; 4. gantry frame; 5. spraying mechanism; 6. clearance hole; 7. electric telescopic rod; 8. guide limit plate;

[0036] 51. Crossbeam; 52. Slide seat; 53. U-shaped plate; 54. L-shaped hanger; 55. Horizontal spray pipe; 56. Nozzle; 57. Plug; 58. Horizontal connecting rod; 59. Vertical plate; 510. Shaft seat; 511. Double-acting screw; 512. Motor 1; 513. Horizontal guide rod; 514. Horizontal indicator rod; 515. Paint container; 516. Transfer pump; 517. Suction pipe; 518. Discharge pipe; 519. Corrugated transfer hose; 520. Inlet pipe; 521. End cap; 522. Motor 2; 523. Disc; 524. Swing arm; 525. Wear-resistant sealing scraper ring; 526. Limit stop. Detailed Implementation

[0037] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] See Figures 1-5This application provides a multi-directional automatic reciprocating spraying device, including a base 1. A conveyor trough 2 is provided on the top of the base 1. A conveyor belt 3 is rotatably installed within the conveyor trough 2. The conveyor belt 3 is used for horizontally and linearly conveying panels such as automotive trim panels that require spraying, gradually transporting the automotive trim panels towards the area of ​​the spraying mechanism 5. It should be noted that multiple equally spaced conveyor rollers are rotatably installed within the conveyor trough 2. The conveyor belt 3 is tensioned and sleeved on the multiple conveyor rollers. A drive motor is installed on the base 1, and the output shaft of the drive motor is fixedly connected to one end of one of the conveyor rollers. By driving the drive motor, the rotation of the conveyor belt 3 can be controlled. Since the installation and control methods of the conveyor belt 3 are mature technologies in this field, they will not be described in detail here. A gantry frame 4 is fixedly installed on the top of the base 1. The frame 4 is equipped with a spraying mechanism 5, which includes a crossbeam 51, a slide 52, a U-shaped plate 53, two L-shaped hangers 54, a transverse spray pipe 55, multiple nozzles 56, a spraying range adjustment assembly, a paint delivery assembly, and a reciprocating drive assembly. The crossbeam 51 is fixedly installed inside the gantry 4, the slide 52 is slidably mounted on the crossbeam 51, the U-shaped plate 53 is fixedly installed at the bottom of the slide 52, the two L-shaped hangers 54 are both fixedly installed at the bottom of the U-shaped plate 53, and the transverse spray pipe 55 is fixedly installed on the two L-shaped hangers 54. Both ends of the transverse spray pipe 55 are open. Multiple nozzles 56 are fixedly connected to the bottom outer wall of the transverse spray pipe 55 and are evenly distributed. With the coordinated action of multiple nozzles 56, paint can be sprayed onto the surface of the automotive trim panel from multiple directions, ensuring the comprehensiveness of the coating on the surface of the automotive trim panel.

[0039] In this embodiment, the spray range adjustment assembly includes two plugs 57, two transverse connecting rods 58, and two vertical plates 59. The two plugs 57 are slidably installed inside the transverse spray pipe 55. The two transverse connecting rods 58 are respectively fixedly installed on the opposite sides of the two plugs 57, with the opposite ends of the two transverse connecting rods 58 extending outside the transverse spray pipe 55. The two vertical plates 59 are respectively fixedly installed on the opposite ends of the two transverse connecting rods 58. The two plugs 57 can seal and separate the internal space of the transverse spray pipe 55, thereby ensuring that the paint is sprayed from the multiple nozzles 56 located between the two plugs 57. The spray range adjustment assembly also includes a bearing 510, a bidirectional lead screw 511, and a motor 512. The bearing 510 is fixedly installed on the left inner wall of the U-shaped plate 53. The left end of the bidirectional lead screw 511 is rotatably connected to the bearing 510. The motor 512 is fixedly installed on the right outer wall of the U-shaped plate 53. The output shaft end of motor 512 is fixedly connected to the right end of the bidirectional lead screw 511. Two vertical plates 59 are threaded onto the bidirectional lead screw 511 and are arranged symmetrically. The bidirectional lead screw 511 is rotated by motor 512. Under the action of the threaded connection between the two vertical plates 59 and the bidirectional lead screw 511, the two plugs 57 can be driven to move synchronously towards or away from each other in the transverse spray pipe 55. This allows for adjustment of the distance between the two plugs 57, changing the number of nozzles 56 between the two plugs 57, and thus changing the effective spraying length. This enables flexible adjustment of the spraying range, which can meet the needs of different sizes of automotive trim panels. For example, when the width of the automotive trim panel decreases, controlling the relative movement of the two plugs 57 to reduce the distance can block some of the nozzles 56, avoiding paint waste. Conversely, controlling the two plugs 57 to move away from each other to increase the distance can release a larger number of nozzles 56 for spraying, which can cover the spraying treatment of large-sized automotive trim panels.

[0040] In this embodiment, clearance holes 6 are provided on both the left and right side walls of the gantry frame 4, and the two ends of the U-shaped plate 53 pass through the corresponding clearance holes 6, which can ensure that the U-shaped plate 53 will not collide with the gantry frame 4 during horizontal movement.

[0041] In this embodiment, a horizontal guide rod 513 is fixedly installed inside the U-shaped plate 53, and the two vertical plates 59 are slidably sleeved on the horizontal guide rod 513. The design of the horizontal guide rod 513 can ensure that the plug 57 moves smoothly and stably inside the horizontal nozzle 55.

[0042] In this embodiment, a horizontal indicator rod 514 is fixedly installed on one side of the two vertical plates 59 that are close to each other. Both horizontal indicator rods 514 are located above the horizontal spray pipe 55. The horizontal indicator rods 514 and the horizontal connecting rods 58 are set to have the same length. The design of the horizontal indicator rods 514 can intuitively determine the position of the plug 57 in the horizontal spray pipe 55, which makes it easy for operators to quickly confirm the current spray width and reduce debugging time.

[0043] In this embodiment, a wear-resistant sealing scraper ring 525 is fixedly sleeved on the outer wall of the plug 57. The wear-resistant sealing scraper ring 525 slides and seals against the inner wall of the transverse spray pipe 55. The design of the wear-resistant sealing scraper ring 525 can prevent paint from leaking from the gap between the plug 57 and the inner wall of the transverse spray pipe 55, and can also scrape off the residual paint on the inner wall of the transverse spray pipe 55 when moving, further preventing paint leakage. Limiting blocks 526 are fixedly installed on the inner walls of both ends of the transverse spray pipe 55. The design of the limiting blocks 526 can block and limit the movement of the plug 57, preventing the plug 57 from moving out of the transverse spray pipe 55.

[0044] In this embodiment, the paint delivery assembly includes a paint container 515, a delivery pump 516, a suction pipe 517, a discharge pipe 518, a corrugated delivery hose 519, and an inlet pipe 520. The paint container 515 and the delivery pump 516 are both fixedly mounted on the top of the gantry frame 4. One end of the suction pipe 517 is fixedly connected to the suction end of the delivery pump 516, and the other end of the suction pipe 517 extends into the paint container 515. One end of the discharge pipe 518 is fixedly connected to the discharge end of the delivery pump 516. One end of the corrugated delivery hose 519 is fixedly connected to the other end of the discharge pipe 518. The corrugated delivery hose 519 is located behind the gantry frame 4. One end of the inlet pipe 520 is connected to the other end of the corrugated delivery hose 519. The inlet pipe 520 is fixedly connected to the middle part of the transverse spray pipe 55. The paint container 515 is used to hold the paint liquid and other coatings required for spraying. By operating the delivery pump 516, the paint liquid in the paint container 515 can be pumped, so that the paint liquid is pumped into the transverse spray pipe 55 through the suction pipe 517, the discharge pipe 518, the corrugated delivery hose 519 and the inlet pipe 520 in sequence. Finally, the paint liquid is sprayed downward from multiple nozzles 56. By using the corrugated delivery hose 519 to connect the discharge pipe 518 and the inlet pipe 520, it can bend freely with the reciprocating movement of the slide 52, avoiding the cracking or leakage of rigid pipes due to frequent movement, and ensuring stable delivery of paint liquid.

[0045] In this embodiment, a filling hole is provided at the top of the paint container 515, and an end cap 521 is threaded into the filling hole to facilitate the addition of paint liquid into the paint container 515.

[0046] In this embodiment, the reciprocating drive assembly includes a second motor 522, a disc 523, and a swing arm 524. The second motor 522 is fixedly installed on the top inner wall of the gantry 4, and the disc 523 is fixedly installed on the output shaft end of the second motor 522. One end of the swing arm 524 is rotatably connected to the bottom of the disc 523 through a first pin, and the axis of the first pin does not coincide with the center of the disc 523. The other end of the swing arm 524 is rotatably connected to the top of the slide block 52 through a second pin. The second motor 522 is used to drive the disc 523 to rotate, and the swing arm 524 drives the slide block 52 to perform reciprocating linear motion on the crossbeam 51. This allows the transverse spray pipe 55 and multiple nozzles 56 to follow the reciprocating linear motion, ensuring that the nozzles 56 spray paint evenly and comprehensively onto the surface of the automotive trim panel, resulting in a consistent paint thickness and improved spraying quality.

[0047] In this embodiment, electric telescopic rods 7 are fixedly installed on both the left and right side walls of the gantry frame 4. Guide limiting plates 8 are fixedly installed on the output shaft ends of the two electric telescopic rods 7. The two guide limiting plates 8 are located above the conveyor belt 3. Under the synergistic action of the two guide limiting plates 8, during the horizontal straight conveying of the car trim panel, it can be ensured that the car trim panel will not shift and can accurately pass through the spraying area below the nozzle 56, ensuring the effectiveness of spraying and preventing spraying misalignment caused by deviation. By using the two electric telescopic rods 7, the distance between the two guide limiting plates 8 can be adjusted, which is suitable for the straight guiding and conveying of car trim panels of different sizes. The gap between the bottom surface of the guide limiting plate 8 and the top outer surface of the conveyor belt 3 is set at 1-3mm, so that the side part of the car trim panel will not be stuck in this gap.

[0048] In this embodiment, it should be noted that the motor 512 is a reversible motor. The motor 512, the delivery pump 516, the motor 522 and the electric telescopic rod 7 can all be purchased on the market. Their wiring connection method and control method are mature technologies in the field and are fully disclosed. Therefore, they will not be described in detail here.

[0049] With the above structure, when the multi-directional automatic reciprocating spraying device provided in this application is used, the car trim panel is placed between the two guide limiting plates 8 on the conveyor belt 3, and the conveyor belt 3 is used to horizontally and linearly transport the car trim panel, so that the car trim panel gradually moves in a straight line towards the spraying mechanism 5. When the car trim panel is about to move below the spray nozzle 56, the conveying pump 516 and the motor 522 are controlled to run. The conveying pump 516 can pump the paint liquid in the paint container 515, so that the paint liquid is pumped into the transverse spray pipe 55 through the suction pipe 517, the discharge pipe 518, the corrugated conveying hose 519 and the inlet pipe 520 in sequence. Finally, the paint is sprayed downwards from multiple nozzles 56, and the sprayed paint is applied to the surface of the car trim panel. At the same time, the motor 522 drives the disc 523 to rotate, and the swing arm 524 drives the slide 52 to reciprocate linearly on the crossbeam 51. This causes the horizontal spray pipe 55 and multiple nozzles 56 to follow the reciprocating linear motion, ensuring that the nozzles 56 spray the paint evenly and comprehensively onto the surface of the car trim panel. The paint thickness is consistent, improving the spraying quality. As the car trim panel passes under the nozzles 56 at a constant speed, the surface of the car trim panel is uniformly sprayed.

[0050] During spraying, the number of spray nozzles 56 can be flexibly adjusted according to the size of the automotive trim panel, thus changing the spraying range. Specifically, by controlling the forward or reverse rotation of motor 512, the output shaft of motor 512 drives the bidirectional lead screw 511 to rotate. Under the threaded connection between the two vertical plates 59 and the bidirectional lead screw 511, the two plugs 57 can be driven to move synchronously towards or away from each other within the transverse spray pipe 55. This adjusts the distance between the two plugs 57, changing the number of spray nozzles 56 between them, and thus altering the effective spraying length, thereby achieving flexible adjustment of the spraying range. It can adapt to different sizes of automotive trim panels. For example, when the width of the automotive trim panel decreases, the two plugs 57 can be moved relative to each other to reduce the gap, which can block part of the nozzles 56 and avoid wasting paint. Conversely, the two plugs 57 can be moved away from each other to increase the gap, which can release a larger number of nozzles 56 for spraying. This can cover the spraying of large-sized automotive trim panels. Moreover, when adjusting the number of nozzles 56 used, the horizontal indicator bar 514 can be used to visually determine the position of the plugs 57 in the horizontal spray pipe 55, which makes it easy for operators to quickly confirm the current spraying width and reduce the debugging time.

[0051] During the spraying process, the distance between the two guide limit plates 8 can be flexibly adjusted according to the size of the car trim panel. By controlling the extension or retraction of the two electric telescopic rods 7, the corresponding guide limit plates 8 can be moved linearly, thereby changing the distance between the two guide limit plates 8. This makes it suitable for linear guiding and conveying of car trim panels of different sizes, ensuring the effectiveness of spraying on the surface of the car trim panel and preventing spraying misalignment caused by deviation.

Claims

1. A multi-directional automatic reciprocating spraying device, characterized in that, The system includes a base (1), a conveying groove (2) on the top of the base (1), a conveyor belt (3) rotatably installed in the conveying groove (2), a gantry frame (4) fixedly installed on the top of the base (1), and a spraying mechanism (5) on the gantry frame (4). The spraying mechanism (5) includes a crossbeam (51), a slide (52), a U-shaped plate (53), two L-shaped rods (54), a horizontal spray pipe (55), multiple nozzles (56), a spraying range adjustment assembly, a paint conveying assembly, and a reciprocating drive assembly. The crossbeam (51) is fixedly installed inside the gantry frame (4), the slide (52) is slidably fitted on the crossbeam (51), the U-shaped plate (53) is fixedly installed at the bottom of the slide (52), and the two L-shaped rods (54) are fixedly installed on the U-shaped plate (53). At the bottom, the horizontal spray pipe (55) is fixedly installed on the two L-shaped hangers (54). Both ends of the horizontal spray pipe (55) are open. Multiple nozzles (56) are fixedly connected to the bottom outer wall of the horizontal spray pipe (55) and are distributed at equal intervals. The spray range adjustment assembly includes two plugs (57), two horizontal connecting rods (58) and two vertical plates (59). The two plugs (57) are slidably installed inside the horizontal spray pipe (55). The two horizontal connecting rods (58) are respectively fixedly installed on the side of the two plugs (57) that are far apart from each other. The ends of the two horizontal connecting rods (58) that are far apart from each other extend to the outside of the horizontal spray pipe (55). The two vertical plates (59) are respectively fixedly installed on the ends of the two horizontal connecting rods (58) that are far apart from each other.

2. The multi-directional automatic reciprocating spraying device according to claim 1, characterized in that: The gantry (4) has clearance holes (6) on both sides, and the two ends of the U-shaped plate (53) pass through the corresponding clearance holes (6).

3. The multi-directional automatic reciprocating spraying device according to claim 1, characterized in that: The spraying range adjustment assembly also includes a bearing seat (510), a bidirectional lead screw (511), and a motor (512). The bearing seat (510) is fixedly installed on the left inner wall of the U-shaped plate (53). The left end of the bidirectional lead screw (511) is rotatably connected to the bearing seat (510). The motor (512) is fixedly installed on the right outer wall of the U-shaped plate (53). The output shaft end of the motor (512) is fixedly connected to the right end of the bidirectional lead screw (511). The two vertical plates (59) are threaded onto the bidirectional lead screw (511) and are arranged symmetrically.

4. The multi-directional automatic reciprocating spraying device according to claim 3, characterized in that: A horizontal guide rod (513) is fixedly installed inside the U-shaped plate (53), and the two vertical plates (59) are slidably sleeved on the horizontal guide rod (513).

5. The multi-directional automatic reciprocating spraying device according to claim 3, characterized in that: A horizontal indicator rod (514) is fixedly installed on one side of each of the two vertical plates (59) that are close to each other. Both horizontal indicator rods (514) are located above the horizontal nozzle (55). The horizontal indicator rods (514) are set to have the same length as the horizontal connecting rod (58).

6. The multi-directional automatic reciprocating spraying device according to claim 3, characterized in that: A wear-resistant sealing scraper ring (525) is fixedly sleeved on the outer wall of the plug (57). The wear-resistant sealing scraper ring (525) slides and seals against the inner wall of the transverse nozzle (55). Limiting blocks (526) are fixedly installed on the inner walls of both ends of the transverse nozzle (55).

7. The multi-directional automatic reciprocating spraying device according to claim 1, characterized in that: The paint delivery assembly includes a paint container (515), a delivery pump (516), a suction pipe (517), a discharge pipe (518), a corrugated delivery hose (519), and an inlet pipe (520). The paint container (515) and the delivery pump (516) are both fixedly mounted on the top of the gantry (4). One end of the suction pipe (517) is fixedly connected to the suction end of the delivery pump (516), and the other end of the suction pipe (517) extends to the paint container (515). 5) Inside, one end of the discharge pipe (518) is fixedly connected to the discharge end of the delivery pump (516), one end of the corrugated delivery hose (519) is fixedly connected to the other end of the discharge pipe (518), the corrugated delivery hose (519) is located behind the gantry (4), one end of the inlet pipe (520) is fixedly connected to the other end of the corrugated delivery hose (519), and the other end of the inlet pipe (520) is fixedly connected to the middle part of the transverse spray pipe (55).

8. The multi-directional automatic reciprocating spraying device according to claim 7, characterized in that: The top of the paint container (515) is provided with a feeding hole, and an end cap (521) is installed in the feeding hole by an internal thread.

9. The multi-directional automatic reciprocating spraying device according to claim 1, characterized in that: The reciprocating drive assembly includes a second motor (522), a disc (523), and a swing arm (524). The second motor (522) is fixedly installed on the top inner wall of the gantry frame (4). The disc (523) is fixedly installed on the output shaft end of the second motor (522). One end of the swing arm (524) is rotatably connected to the bottom of the disc (523) through a first pin. The axis of the first pin does not coincide with the center of the disc (523). The other end of the swing arm (524) is rotatably connected to the top of the slide block (52) through a second pin.

10. The multi-directional automatic reciprocating spraying device according to claim 1, characterized in that: Electric telescopic rods (7) are fixedly installed on both the left and right side walls of the gantry frame (4). Guide limiting plates (8) are fixedly installed on the output shaft ends of the two electric telescopic rods (7). The two guide limiting plates (8) are located above the conveyor belt (3).

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