A wood carving paint spraying device

Abstract

The present application belongs to the technical field of wood carving paint spraying, and specifically discloses a wood carving paint spraying device, which comprises a paint spraying box, a workpiece rotating support mechanism, a feeding mechanism and a pneumatic back pressure self-adjusting paint spraying device. The self-adaptive telescopic support assembly is used to stably clamp the uneven wood carving bottom surface. Then, the pneumatic back pressure self-adjusting constant distance mechanism is used to drive the spray gun to dynamically track the complex curved surface in real time by using the real-time feedback of the spraying back pressure, so that the spray distance is constant, and the industry problem of uneven paint film on the special-shaped surface is fundamentally solved. In combination with the rotating and vertical feeding movements, the uniform spraying of the whole surface is completed. The whole device replaces the expensive electronic sensing feedback system with a clever pure mechanical structure, significantly improves the spraying quality while greatly reducing the cost, and provides a creative solution for the automatic coating of irregular handicrafts.

Description

Technical Field

[0001] This invention belongs to the field of wood carving spray painting technology, specifically referring to a wood carving spray painting device. Background Technology

[0002] As a traditional craft, wood carving relies heavily on painting for surface protection and to enhance its artistic expression. Currently, wood carving painting mainly relies on manual hand-held spray guns, which is labor-intensive, inefficient, and the paint mist is harmful to the health of operators. Existing automated painting equipment is mostly designed for regular flat or rotating workpieces and is difficult to apply directly to wood carving.

[0003] Wood carvings generally have the following characteristics: First, the bottom surface is often not finely processed and is uneven. Traditional rigid clamps or platforms are difficult to provide stable and balanced support, which can easily cause the workpiece to shake or be mispositioned during the painting process. Second, the surface contours of wood carvings are complex, consisting of a large number of irregular curved surfaces and concave and convex details. Although existing automated painting devices (such as multi-axis robotic arms) can achieve complex trajectories, the equipment is expensive and the programming is complicated, making it difficult to popularize for small and medium-sized wood carving workshops. Simple rotating or translating painting devices cannot sense and adaptively adjust the distance between the spray gun and the complex curved surface in real time. This can easily lead to excessively large painting distances, resulting in paint waste and low paint coverage, or too small distances, resulting in paint accumulation, drips, or even collisions that damage the workpiece surface. It is also difficult to ensure the uniformity and consistency of the paint film thickness.

[0004] Therefore, developing a compact, low-cost painting device that can adapt to the irregular bottom surface of wood carvings for stable clamping and automatically maintain a constant distance between the spray gun and the complex contour surface during the spraying process is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a wood carving painting device. Through an adaptive telescopic support component, it achieves stable clamping of uneven wood carving surfaces. Furthermore, it employs a pneumatic back pressure self-adjusting constant-distance mechanism, utilizing real-time feedback of the spraying back pressure to drive the spray gun to dynamically track complex curved surfaces, ensuring a constant spray distance and fundamentally solving the industry problem of uneven paint film on irregular surfaces. Combined with rotational and vertical feed motions, it achieves uniform spraying across the entire surface. The entire device cleverly replaces the expensive electronic sensor feedback system with a purely mechanical structure, significantly improving spraying quality while drastically reducing costs, providing a creative solution for automated painting of irregular handicrafts.

[0006] The technical solution adopted by this invention is as follows: This invention provides a wood carving painting device, including a paint spraying box, a workpiece rotation support mechanism, a feeding mechanism, and a pneumatic back pressure self-adjusting painting device. The workpiece rotation support mechanism is located in the paint spraying box, the feeding mechanism is located in the paint spraying box, and the pneumatic back pressure self-adjusting painting device is located on the paint spraying box and the feeding mechanism. The pneumatic back pressure self-adjusting painting device includes a pneumatic back pressure self-adjusting constant distance component, a spray gun assembly, a paint spraying bucket, and a compressed air tank. The pneumatic back pressure self-adjusting constant distance component is located on the feeding mechanism, the spray gun assembly is connected to the pneumatic back pressure self-adjusting constant distance component, the paint spraying bucket is located in the paint spraying box, the compressed air tank is located in the paint spraying box, and the spray gun assembly is connected to both the paint spraying bucket and the compressed air tank.

[0007] Furthermore, the pneumatic back pressure self-adjusting constant distance component includes an adjusting sleeve, an annular shoulder, a pre-compression spring, a front cavity, and a rear cavity. The adjusting sleeve is mounted on the feeding mechanism. The annular shoulder is engaged and slidably mounted in the adjusting sleeve. One end of the pre-compression spring is mounted on the inner wall of the adjusting sleeve, and the other end of the pre-compression spring is connected to the annular shoulder. The annular shoulder divides the adjusting sleeve into a front cavity and a rear cavity. The front cavity communicates with the outside through the opening at the front end of the adjusting sleeve, and the pre-compression spring is located in the rear cavity.

[0008] Preferably, the inner wall of the adjusting sleeve is provided with a guide groove, and the annular shoulder is engaged and slidably disposed in the guide groove.

[0009] Furthermore, the spray gun assembly includes a spray gun, a paint channel, and a compression atomizing nozzle. The spray gun is located on an annular shoulder, the paint channel is located at the central axis of the spray gun, the compression atomizing nozzle is threadedly connected to the front end of the spray gun, and a compression air passage is provided between the compression atomizing nozzle and the outer wall of the front end of the spray gun.

[0010] The spray gun is equipped with a paint supply hole, and the paint can is equipped with a paint pump. The paint pump is connected to the paint supply hole through a telescopic paint supply pipe.

[0011] Furthermore, the compressed atomizing nozzle is provided with an air supply hole, and the compressed air tank is connected to the air supply hole through a telescopic air supply pipe.

[0012] As a further preferred embodiment of the present invention, the workpiece rotation support mechanism includes a turntable, an elastically adjustable support, a pressing member, and a rotary motor. The turntable is rotatably disposed in a paint spraying box, the elastically adjustable support is disposed in the turntable, the pressing member is disposed in the paint spraying box, and the rotary motor is disposed in the paint spraying box. The output end of the rotary motor is connected to the turntable.

[0013] Furthermore, the elastic adjustment support includes a locking moving block, an adjusting screw, a hollow support column, a supporting compression spring, a telescopic column, and a flexible anti-slip pad. The turntable is provided with an adjustment groove, the adjusting screw is rotatably disposed in the adjustment groove, the locking moving block is locked and slidably disposed in the adjustment groove, the locking moving block is sleeved on the adjusting screw, the locking moving block is threadedly connected to the adjusting screw, the hollow support column is disposed on the locking moving block, the supporting compression spring is disposed in the hollow support column, the telescopic column is locked and slidably disposed in the hollow support column, the lower end of the telescopic column is connected to the supporting compression spring, and the flexible anti-slip pad is connected to the upper end of the telescopic column.

[0014] Furthermore, the pressing component includes a lifting adjustment frame, a lifting screw, a lifting block, a connecting rod, a rotating pressing head, and a lifting motor. The lifting adjustment frame is located in the paint spray box, the lifting screw is located in the lifting adjustment frame, the lifting block is slidably engaged in the lifting adjustment frame, the lifting block is sleeved on the lifting screw, the lifting block and the lifting screw are threadedly connected, the connecting rod is located on the lifting block, the rotating pressing head is connected to the movable end of the connecting rod, the rotating pressing head corresponds to the center of the turntable, the lifting motor is located on the lifting adjustment frame, and the output end of the lifting motor is connected to the lifting screw.

[0015] The feeding mechanism includes a lateral adjustment component and a vertical feed component. The lateral adjustment component is located in the paint spray box, and the vertical feed component is connected to the lateral adjustment component. The lateral adjustment component includes a lateral adjustment frame, a lateral adjustment screw, and a locking support block. The lateral adjustment frame is located in the paint spray box, the lateral adjustment screw is rotatably mounted in the lateral adjustment frame, and the locking support block is slidably mounted in the lateral adjustment frame. The locking support block is sleeved on the lateral adjustment screw and threadedly connected to the lateral adjustment screw. The vertical feed component includes a vertical feed frame, a vertical feed screw, a vertical feed block, and a feed motor. The vertical feed frame is mounted on a locking support block. The vertical feed screw is rotatably mounted on the vertical feed frame. The vertical feed block is slidably mounted on the vertical feed frame. The vertical feed block is sleeved on the vertical feed screw and threadedly connected to the vertical feed screw. An adjusting sleeve is mounted on the vertical feed block. The feed motor is mounted on the vertical feed frame, and the output end of the feed motor is connected to the vertical feed screw.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows: 1. Adaptive bottom support for stable and reliable clamping: By setting up a workpiece rotation support mechanism, using a combination of movable hollow support columns, support compression springs and telescopic columns, and flexible anti-slip pads, it can adaptively expand and contract according to the actual contour of the wood carving bottom. Even if the bottom of the wood carving is uneven, this support structure can achieve multi-point balanced support, effectively avoiding the workpiece shaking or stress concentration damage caused by traditional rigid supports, and providing a stable clamping foundation for subsequent precise spraying. 2. Achieving constant distance control between the spray gun and complex curved surfaces, significantly improving spraying quality: A pneumatic back pressure self-adjusting constant distance component is creatively introduced. This mechanism uses the back pressure generated by the impact of atomized air on the wood carving surface at the compressed atomizing nozzle as a feedback signal to drive the spray gun to automatically extend or retract. When the surface of the wood carving changes, the mechanism can dynamically and instantaneously complete the distance adjustment, so that the spray gun and the workpiece surface always maintain the optimal spray distance. This fundamentally solves the problem of uneven paint film thickness caused by the inability of traditional equipment to adapt to complex curved surfaces, effectively avoiding overspray, missed spray and sagging, and significantly improving the uniformity, adhesion and overall spraying quality of the paint film. 3. Achieve full surface coverage and high degree of automation: The wood carving is driven to rotate by a rotary motor, and the vertical feeding mechanism drives the spray gun to perform lifting and scanning motion. The two motions are superimposed to achieve full and no dead angle spraying of the complex three-dimensional contour of the wood carving. The whole process does not require manual intervention, which greatly reduces the labor intensity of operators and the risk of contact with paint, and improves production efficiency and operational safety. 4. Ingenious structure and controllable cost: Compared with intelligent painting robots that use high-precision sensors and complex feedback control systems, this invention mainly uses purely mechanical structures such as mechanical and pneumatic systems (such as pre-compression springs and back pressure cavities) to achieve adaptive adjustment of spacing. This design is ingenious, responsive, and highly reliable, while greatly reducing manufacturing and maintenance costs. It is especially suitable for promotion and use in small and medium-sized wood carving processing enterprises. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a wood carving spray painting device proposed in this invention; Figure 2 This is a left view of a wood carving spray painting device proposed in this invention; Figure 3 This is a front view of a wood carving spray painting device proposed in this invention; Figure 4 This is a top view of a wood carving spray painting device proposed in this invention; Figure 5 This is a bottom view of a wood carving spray painting device proposed in this invention; Figure 6 This is a cross-sectional view of a wood carving spray painting device proposed in this invention; Figure 7 This is a schematic diagram of the internal structure of a wood carving spray painting device proposed in this invention; Figure 8 A partial structural schematic diagram of the workpiece rotation support mechanism; Figure 9 A cross-sectional schematic diagram of a portion of the workpiece rotation support mechanism; Figure 10 This is a schematic diagram of the structure of the pressure-holding component; Figure 11 This is a schematic diagram of the structure of a pneumatic back pressure self-adjusting constant distance component; Figure 12 This is a schematic cross-sectional view of a pneumatic back pressure self-adjusting constant distance component. Figure 13 This is a structural schematic diagram of the spray gun assembly; Figure 14 This is a cross-sectional structural diagram of the spray gun assembly; Figure 15 This is a schematic diagram of the structure of a compression atomizing nozzle; Figure 16 This is a schematic diagram of the cross-sectional structure of a compression atomizing nozzle.

[0018] The components include: 1. Spray booth; 2. Workpiece rotation support mechanism; 3. Feeding mechanism; 4. Pneumatic back pressure self-adjusting spray painting device; 5. Pneumatic back pressure self-adjusting constant distance component; 6. Spray gun assembly; 7. Spray paint bucket; 8. Compressed air tank; 9. Adjusting sleeve; 10. Annular shoulder; 11. Pre-compression spring; 12. Front chamber; 13. Rear chamber; 14. Guide groove; 15. Spray gun; 16. Paint channel; 17. Compressed atomizing nozzle; 18. Compressed air passage; 19. Paint supply hole; 20. Paint pump; 21. Telescopic paint supply pipe; 22. Air supply hole; 23. Telescopic air supply pipe; 24. Turntable; 25. Elastic adjustment support component. 26. Holding component; 27. Rotary motor; 28. Engaging moving block; 29. ​​Adjusting screw; 30. Hollow support column; 31. Support compression spring; 32. Telescopic column; 33. Flexible anti-slip pad; 34. Adjusting groove; 35. Lifting adjustment frame; 36. Lifting screw; 37. Lifting block; 38. Connecting rod; 39. Rotating holding head; 40. Lifting motor; 41. Lateral adjustment component; 42. Vertical feed component; 43. Lateral adjustment frame; 44. Lateral adjustment screw; 45. Engaging support block; 46. Vertical feed frame; 47. Vertical feed screw; 48. Vertical feed block; 49. Feed motor.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1-16 As shown, the present invention provides a wood carving painting device, including a paint spraying box 1, a workpiece rotation support mechanism 2, a feeding mechanism 3, and a pneumatic back pressure self-adjusting painting device 4. The workpiece rotation support mechanism 2 is disposed in the paint spraying box 1, the feeding mechanism 3 is disposed in the paint spraying box 1, and the pneumatic back pressure self-adjusting painting device 4 is disposed on the paint spraying box 1 and the feeding mechanism 3.

[0023] The workpiece rotation support mechanism 2 includes a turntable 24, an elastically adjustable support 25, a holding member 26, and a rotary motor 27. The turntable 24 is rotatably mounted in the paint spray box 1. The elastically adjustable support 25 is mounted in the turntable 24, the holding member 26 is mounted in the paint spray box 1, and the rotary motor 27 is mounted in the paint spray box 1. The output end of the rotary motor 27 is connected to the turntable 24. The elastically adjustable support 25 includes a locking moving block 28, an adjusting screw 29, a hollow support column 30, a support compression spring 31, a telescopic column 32, and a flexible anti-slip pad 33. The turntable 24 has an adjusting groove 34. The adjusting screw 29 is rotatably mounted in the adjusting groove 34. The locking moving block 28 is locked and slidably mounted in the adjusting groove 34. The locking moving block 28 is sleeved on the adjusting screw 29 and threadedly connected to the adjusting screw 29. The hollow support column 30 is mounted on the locking moving block 28, and the support compression spring 31 is mounted in the hollow... In the support column 30, the telescopic column 32 is engaged and slidably disposed in the hollow support column 30. The lower end of the telescopic column 32 is connected to the support compression spring 31, and the flexible anti-slip pad 33 is connected to the upper end of the telescopic column 32. The holding component 26 includes a lifting adjustment frame 35, a lifting screw 36, a lifting block 37, a connecting rod 38, a rotating holding head 39, and a lifting motor 40. The lifting adjustment frame 35 is disposed in the paint spray box 1. The lifting screw 36 is disposed in the lifting adjustment frame 35. The lifting block 37 is engaged and slidably disposed in the lifting adjustment frame 35. The lifting block 37 is sleeved on the lifting screw 36 and threadedly connected to the lifting screw 36. The connecting rod 38 is disposed on the lifting block 37. The rotating holding head 39 is connected to the movable end of the connecting rod 38 and corresponds to the center of the turntable 24. The lifting motor 40 is disposed on the lifting adjustment frame 35, and the output end of the lifting motor 40 is connected to the lifting screw 36.

[0024] The feed mechanism 3 includes a lateral adjustment component 41 and a vertical feed component 42. The lateral adjustment component 41 is located in the paint spray box 1, and the vertical feed component 42 is connected to the lateral adjustment component 41. The lateral adjustment component 41 includes a lateral adjustment frame 43, a lateral adjustment screw 44, and a locking support block 45. The lateral adjustment frame 43 is located in the paint spray box 1, the lateral adjustment screw 44 is rotatably located in the lateral adjustment frame 43, and the locking support block 45 is locked and slidably located in the lateral adjustment frame 43. The locking support block 45 is sleeved on the lateral adjustment screw 44 and is threadedly connected to the lateral adjustment screw 44. The vertical feed component 42 is also included. Component 42 includes a vertical feed frame 46, a vertical feed screw 47, a vertical feed block 48, and a feed motor 49. The vertical feed frame 46 is mounted on the engaging support block 45. The vertical feed screw 47 is rotatably mounted in the vertical feed frame 46. The vertical feed block 48 is engaged and slidably mounted in the vertical feed frame 46. The vertical feed block 48 is sleeved on the vertical feed screw 47 and threadedly connected to the vertical feed screw 47. An adjusting sleeve 9 is mounted on the vertical feed block 48. The feed motor 49 is mounted on the vertical feed frame 46, and the output end of the feed motor 49 is connected to the vertical feed screw 47.

[0025] The pneumatic back pressure self-adjusting spray painting device 4 includes a pneumatic back pressure self-adjusting constant distance component 5, a spray gun assembly 6, a paint bucket 7, and a compressed air tank 8. The pneumatic back pressure self-adjusting constant distance component 5 is mounted on the feeding mechanism 3. The spray gun assembly 6 is connected to the pneumatic back pressure self-adjusting constant distance component 5. The paint bucket 7 is located in the paint box 1, and the compressed air tank 8 is located in the paint box 1. The spray gun assembly 6 is connected to both the paint bucket 7 and the compressed air tank 8. The pneumatic back pressure self-adjusting constant distance component 5 includes an adjusting sleeve 9, an annular shoulder 10, a pre-compression spring 11, a front cavity 12, and a rear cavity 13. The adjusting sleeve 9 is mounted on the feeding mechanism 3. The annular shoulder 10 is engaged and slidably mounted in the adjusting sleeve 9. One end of the pre-compression spring 11 is located on the inner wall of the adjusting sleeve 9, and the other end of the pre-compression spring 11 is connected to the annular shoulder 10. The annular shoulder 10 divides the adjusting sleeve 9 into the front cavity 12 and the rear cavity 13. The front cavity 12 communicates with the outside through the front opening of the adjusting sleeve 9, and the pre-compression spring 11 is located in the rear cavity 13; the inner side wall of the adjusting sleeve 9 is provided with a guide groove 14, and the annular shoulder 10 is engaged and slidably located in the guide groove 14; the spray gun assembly 6 includes a spray gun 15, a paint channel 16 and a compression atomizing nozzle 17, the spray gun 15 is located on the annular shoulder 10, the paint channel 16 is located at the central axis of the spray gun 15, the compression atomizing nozzle 17 is threadedly connected to the front end of the spray gun 15, and a compression air passage 18 is left between the compression atomizing nozzle 17 and the outer wall of the front end of the spray gun 15; the spray gun 15 is provided with a paint supply hole 19, the paint tank 7 is provided with a paint pump 20, and the paint pump 20 is connected to the paint supply hole 19 through a telescopic paint supply pipe 21; the compression atomizing nozzle 17 is provided with an air supply hole 22, and the compressed air tank 8 is connected to the air supply hole 22 through a telescopic air supply pipe 23.

[0026] In practical use, the wood carving to be painted is placed on the workpiece rotating support mechanism 2. According to the size of the wood carving, the adjusting screw 29 is rotated. The rotation of the adjusting screw 29 causes the engaging moving block 28 to move along the adjusting groove 34. The movement of the engaging moving block 28 causes the hollow support column 30 to move. The movement of the hollow support column 30 causes the support compression spring 31 to move. The movement of the support compression spring 31 causes the telescopic column 32 to move. The movement of the telescopic column 32 causes the flexible anti-slip pad 33 to move, so that the flexible anti-slip pad 33 provides even support for the wood carving. If the bottom surface of the wood carving is uneven, the telescopic column 32 can adaptively extend and retract under the action of the support compression spring 31, thereby achieving support for the uneven bottom surface of the wood carving. The support is then activated, followed by the start of the lifting motor 40. The rotation of the lifting motor 40 drives the lifting screw 36 to rotate, which in turn drives the lifting block 37 to rise and fall. The rising and falling of the lifting block 37 drives the connecting rod 38 to rise and fall, which in turn drives the rotating pressure head 39 to rise and fall. The rotating pressure head 39 presses down on the upper end of the wood carving, achieving the technical effect of supporting and fixing the wood carving. The horizontal adjusting screw 44 is then rotated, causing the locking support block 45 to move along the horizontal adjusting frame 43. The movement of the locking support block 45 causes the vertical feed frame 46 to move, which in turn causes the vertical feed screw 47 to move, which in turn causes the vertical feed block 48 to move. The pneumatic back pressure self-adjusting constant distance component 5 moves, which in turn moves the spray gun assembly 6. When the spray gun assembly 6 reaches a suitable position relative to the wood carving, the rotary motor 27 is activated. The rotary motor 27 rotates, causing the turntable 24 to rotate, which in turn rotates the wood carving. Simultaneously, the feed motor 49 is activated, causing the vertical feed screw 47 to rotate. The vertical feed screw 47 rotates, causing the vertical feed block 48 to rise and fall. The rise and fall of the vertical feed block 48 causes the pneumatic back pressure self-adjusting constant distance component 5 to rise and fall, which in turn causes the spray gun assembly 6 to rise and fall. The rise and fall of the spray gun assembly 6 performs a rotating, vertically lifting and painting operation on the wood carving. The paint pump is then activated. 20. The paint pump 20 draws paint from the paint can 7 and transfers it to the telescopic paint supply pipe 21, which then transfers it to the paint channel 16. At the same time, the compressed air tank 8 is activated, which transfers compressed gas to the telescopic air supply pipe 23, which then transfers it to the compressed air passage 18. The compressed air is ejected through the compressed air passage 18, creating a negative pressure at the compressed atomizing nozzle 17 to draw in the paint and atomize it. After the high-speed atomized air impacts the wood carving surface, a relatively high-pressure zone is formed in the front cavity 12 area. This pressure acts directly on the front end face of the annular shoulder 10, generating a backward thrust on the spray gun 15. The pre-compression spring 11 then applies a forward thrust to the spray gun 15.When the backward thrust equals the forward thrust, the spray gun 15 is in a balanced position. At this time, the distance between the compressed atomizing nozzle 17 and the wood carving surface is the optimal spray distance. If there is a protrusion on the wood carving surface, the distance decreases, the back pressure increases, and the backward thrust is greater than the forward thrust. The spray gun 15 then retracts to increase the distance. If the surface is concave, the distance increases, the back pressure decreases, and the backward thrust is less than the forward thrust. The spray gun 15 then extends forward to decrease the distance. This process is completed dynamically and instantaneously, allowing the spray gun 15 to maintain a constant distance for spraying on the complex contour surface of the wood carving. At the same time, the rotation of the wood carving and the vertical scanning of the spray gun 15 are superimposed to achieve full surface coverage. The above is the specific working process of this invention. This step can be repeated for the next use.

[0027] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the foregoing and its equivalents.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wood carving spray painting device, characterized in that: The system includes a paint spraying box (1), a workpiece rotation support mechanism (2), a feeding mechanism (3), and a pneumatic back pressure self-adjusting paint spraying device (4). The workpiece rotation support mechanism (2) is located in the paint spraying box (1), the feeding mechanism (3) is located in the paint spraying box (1), and the pneumatic back pressure self-adjusting paint spraying device (4) is located on the paint spraying box (1) and the feeding mechanism (3). The pneumatic back pressure self-adjusting paint spraying device (4) includes a pneumatic back pressure self-adjusting constant pressure system. The components include a distance element (5), a spray gun assembly (6), a paint bucket (7), and a compressed air tank (8). The pneumatic back pressure self-adjusting constant distance element (5) is mounted on the feed mechanism (3). The spray gun assembly (6) is connected to the pneumatic back pressure self-adjusting constant distance element (5). The paint bucket (7) is located in the paint spray box (1). The compressed air tank (8) is located in the paint spray box (1). The spray gun assembly (6) is connected to the paint bucket (7) and the compressed air tank (8) respectively.

2. The wood carving spray painting device according to claim 1, characterized in that: The pneumatic back pressure self-adjusting constant distance component (5) includes an adjusting sleeve (9), an annular shoulder (10), a pre-compression spring (11), a front cavity (12), and a rear cavity (13). The adjusting sleeve (9) is mounted on the feeding mechanism (3). The annular shoulder (10) is engaged and slidably mounted in the adjusting sleeve (9). One end of the pre-compression spring (11) is mounted on the inner wall of the adjusting sleeve (9), and the other end of the pre-compression spring (11) is connected to the annular shoulder (10). The annular shoulder (10) divides the adjusting sleeve (9) into a front cavity (12) and a rear cavity (13). The front cavity (12) communicates with the outside through the opening at the front end of the adjusting sleeve (9), and the pre-compression spring (11) is mounted in the rear cavity (13).

3. The wood carving spray painting device according to claim 2, characterized in that: The inner wall of the adjusting sleeve (9) is provided with a guide groove (14), and the annular shoulder (10) is engaged and slidably disposed in the guide groove (14).

4. The wood carving spray painting device according to claim 3, characterized in that: The spray gun assembly (6) includes a spray gun (15), a paint channel (16) and a compression atomizing nozzle (17). The spray gun (15) is located on an annular shoulder (10). The paint channel (16) is located at the central axis of the spray gun (15). The compression atomizing nozzle (17) is threadedly connected to the front end of the spray gun (15). A compression air passage (18) is left between the compression atomizing nozzle (17) and the outer wall of the front end of the spray gun (15).

5. A wood carving spray painting device according to claim 4, characterized in that: The spray gun (15) is provided with a paint supply hole (19), and the paint tank (7) is provided with a paint pump (20). The paint pump (20) is connected to the paint supply hole (19) through a telescopic paint supply pipe (21).

6. A wood carving spray painting device according to claim 5, characterized in that: The compressed atomizing nozzle (17) is provided with an air supply hole (22), and the compressed air tank (8) is connected to the air supply hole (22) through a telescopic air supply pipe (23).

7. A wood carving spray painting device according to claim 6, characterized in that: The workpiece rotation support mechanism (2) includes a turntable (24), an elastic adjustment support (25), a pressing member (26), and a rotary motor (27). The turntable (24) is rotatably mounted in the paint spray box (1). The elastic adjustment support (25) is mounted in the turntable (24). The pressing member (26) is mounted in the paint spray box (1). The rotary motor (27) is mounted in the paint spray box (1). The output end of the rotary motor (27) is connected to the turntable (24).

8. A wood carving spray painting device according to claim 7, characterized in that: The elastic adjustment support (25) includes a locking moving block (28), an adjusting screw (29), a hollow support column (30), a support compression spring (31), a telescopic column (32), and a flexible anti-slip pad (33). The turntable (24) is provided with an adjustment groove (34). The adjusting screw (29) is rotatably disposed in the adjustment groove (34). The locking moving block (28) is locked and slidably disposed in the adjustment groove (34). The locking moving block (28) is sleeved on the adjustment groove (33). On the screw (29), the engaging moving block (28) is threadedly connected to the adjusting screw (29), the hollow support column (30) is disposed on the engaging moving block (28), the support compression spring (31) is disposed in the hollow support column (30), the telescopic column (32) is engaged and slidably disposed in the hollow support column (30), the lower end of the telescopic column (32) is connected to the support compression spring (31), and the flexible anti-slip pad (33) is connected to the upper end of the telescopic column (32).

9. A wood carving spray painting device according to claim 8, characterized in that: The holding component (26) includes a lifting adjustment frame (35), a lifting screw (36), a lifting block (37), a connecting rod (38), a rotating holding head (39), and a lifting motor (40). The lifting adjustment frame (35) is located in the paint spray box (1). The lifting screw (36) is located in the lifting adjustment frame (35). The lifting block (37) is engaged and slidably located in the lifting adjustment frame (35). The lifting block (37) is sleeved on the lifting screw (36). The lifting block (37) is threadedly connected to the lifting screw (36). The connecting rod (38) is located on the lifting block (37). The rotating holding head (39) is connected to the movable end of the connecting rod (38). The rotating holding head (39) corresponds to the center of the turntable (24). The lifting motor (40) is located on the lifting adjustment frame (35). The output end of the lifting motor (40) is connected to the lifting screw (36).

10. A wood carving spray painting device according to claim 9, characterized in that: The feeding mechanism (3) includes a lateral adjustment component (41) and a vertical feed component (42). The lateral adjustment component (41) is located in the paint spray box (1), and the vertical feed component (42) is connected to the lateral adjustment component (41). The lateral adjustment component (41) includes a lateral adjustment frame (43), a lateral adjustment screw (44), and a locking support block (45). The lateral adjustment frame (43) is located in the paint spray box (1), the lateral adjustment screw (44) is rotatably located in the lateral adjustment frame (43), and the locking support block (45) is locked and slidably located in the lateral adjustment frame (43). The locking support block (45) is sleeved on the lateral adjustment screw (44), and the locking support block (45) is threadedly connected to the lateral adjustment screw (44). The vertical feed component (42) is located in the paint spray box (1). The feed component (42) includes a vertical feed frame (46), a vertical feed screw (47), a vertical feed block (48), and a feed motor (49). The vertical feed frame (46) is mounted on a locking support block (45). The vertical feed screw (47) is rotatably mounted in the vertical feed frame (46). The vertical feed block (48) is locked and slidably mounted in the vertical feed frame (46). The vertical feed block (48) is sleeved on the vertical feed screw (47). The vertical feed block (48) is threadedly connected to the vertical feed screw (47). The adjusting sleeve (9) is mounted on the vertical feed block (48). The feed motor (49) is mounted on the vertical feed frame (46). The output end of the feed motor (49) is connected to the vertical feed screw (47).

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