Five-axis miniature paint sprayer

Abstract

The utility model relates to the technical field of paint spraying equipment, in particular to a five-axis miniature paint spraying machine, which comprises a case provided with a feeding window and a paint spraying head arranged in the case, the paint spraying head is communicated with a pump body, and the pump body is communicated with external oil storage equipment; the positioning fixture is arranged on the case and is used for clamping the tool and exposing the position to be subjected to oil injection of the workpiece; the first rotation driving device is connected to the positioning clamp and used for driving the positioning clamp to rotate in the Y-axis direction; the displacement driving device is used for driving the paint spraying head to move to the oil spraying station from the initial position to perform paint spraying operation on the workpiece at the positioning clamp; and the second rotation driving device is connected to the displacement driving device and used for driving the paint spraying head to rotate in the X-axis direction. The method has the effects of improving the qualified rate and consistency of the workpieces and reducing the health risk of personnel.

Description

Technical Field

[0001] This utility model relates to the technical field of spray painting equipment, and in particular to a five-axis micro spray painting machine. Background Technology

[0002] In the field of automatic toy painting, the painting process is an important step in decorating the surface of toy workpieces. With the continuous development of technology, the demand for painting small toy workpieces is increasing, and higher requirements are being placed on the precision, uniformity and efficiency of the painting process.

[0003] Currently, for small toy parts with small size and complex structure, the market generally uses manual hand-held spray gun painting. This traditional operation mode relies on the operator holding the workpiece and controlling the angle of the spray gun, completing the painting by reciprocating movement. However, this method has many drawbacks: 1. Manual operation is limited by hand stability and visual judgment, making it difficult to accurately control the paint thickness, uniformity, and coverage of complex curved surfaces, resulting in low workpiece qualification rate and poor consistency, as well as low work efficiency; 2. Manual operation involves long-term close contact with paint mist environment containing heavy metal pigments, which can easily cause great physical harm and urgently needs to be solved. Utility Model Content

[0004] To address the shortcomings of the prior art, this application provides a five-axis miniature paint sprayer.

[0005] The above-mentioned inventive objective of this application is achieved through the following technical solutions:

[0006] The machine casing has a feeding window and an internal spray head. The spray head is connected to a pump body, which is connected to an external oil storage device.

[0007] A positioning fixture, which is set in the chassis and used to hold the tool and expose the workpiece at the position to be sprayed with oil;

[0008] A first rotary drive device is connected to the positioning fixture and is used to drive the positioning fixture to rotate along the Y-axis direction;

[0009] A displacement drive device is used to drive the paint spray head to move from the initial position to the spraying station to perform a painting operation on the workpiece at the positioning fixture.

[0010] The second rotary drive device is connected to the displacement drive device and is used to drive the paint spray head to rotate along the X-axis.

[0011] Preferably, the positioning fixture includes a rotary mounting base and an A-shaped spring clamp. The rotary mounting base is connected to the first rotary drive device. The A-shaped spring clamp is detachably mounted on the rotary mounting base. The upper and lower opening ends of the A-shaped spring clamp are respectively provided with an upper clamping plate and a lower clamping plate. The upper clamping plate and the lower clamping plate are respectively provided with cavities adapted to the shape of the workpiece. Furthermore, the front end of the upper clamping plate and the front end of the lower clamping plate are both provided with protrusions adapted to the shape of the workpiece.

[0012] Preferably, the A-shaped spring clip is made of magnetic material, and a magnetic absorbing piece is provided in the rotating mounting base at the position corresponding to the A-shaped spring clip. When the A-shaped spring clip is located in the rotating mounting base, the A-shaped spring clip and the magnetic absorbing piece are magnetically attracted to each other.

[0013] Preferably, the magnetic chuck is inclinedly disposed within the rotating mounting base so that when the A-shaped spring clip and the magnetic chuck are magnetically engaged, both the upper and lower clamping plates are horizontally disposed.

[0014] Preferably, the five-axis miniature spray painting machine also includes an opening and closing assembly, which is used to open the A-shaped spring clip after the spray head has completed the spraying operation.

[0015] Preferably, the opening and closing assembly includes a drive cylinder and a pressure block. The pressure block is fixedly installed on the piston rod end of the drive cylinder and is used to abut against the rear end of the A-shaped spring clip to open the upper and lower opening ends of the A-shaped spring clip. The drive cylinder is vertically installed inside the chassis and is used to drive the pressure block to move closer to or away from the A-shaped spring clip.

[0016] Preferably, the first rotary drive device includes a drive motor, which is fixedly installed inside the housing. The output shaft of the drive motor is fixedly connected to the rotary mounting base. When the A-shaped spring clip is installed on the rotary mounting base, the drive motor is used to drive the A-shaped spring clip to rotate from its shaft.

[0017] Preferably, the second rotary drive device includes a rotary cylinder, the piston rod of which is fixedly connected to the paint spray head, and the rotary cylinder is fixedly installed on the displacement drive device such that its installation position is such that it drives the paint spray head to rotate along the X-axis.

[0018] Preferably, the displacement drive device includes an X-axis displacement mechanism, a Y-axis displacement mechanism, and a Z-axis displacement mechanism connected in sequence. The X-axis displacement mechanism, the Y-axis displacement mechanism, and the Z-axis displacement mechanism work together to drive the paint spray head to complete the XYZ three-axis movement inside the machine housing. The second rotary drive device is connected to the Z-axis displacement mechanism.

[0019] Preferably, the X-axis displacement mechanism includes an X-axis guide rail disposed along the X-axis inside the housing and an X-axis slide block slidably fitted to the X-axis guide rail. An X-axis motor is disposed inside the X-axis slide block, and an X-axis gear is coaxially disposed on the output shaft of the X-axis motor. An X-axis rack for meshing with the X-axis gear is disposed along the X-axis inside the housing.

[0020] The Y-axis displacement mechanism includes a Y-axis guide rail set along the Y-axis inside the X-axis slide and a Y-axis slide that is slidably fitted to the Y-axis guide rail. A Y-axis motor is set inside the X-axis slide. A Y-axis gear is coaxially set on the output shaft of the Y-axis motor. A Y-axis rack for meshing with the Y-axis gear is set along the Y-axis inside the housing.

[0021] The Z-axis displacement mechanism includes a lifting cylinder, which is vertically fixed on the X-axis slide, and a second rotary drive device is connected to the piston rod end of the lifting cylinder.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: Through the coordinated operation of the displacement drive device controlling the XYZ three-axis movement of the spray head, the first rotary drive device controlling the Y-axis rotation of the workpiece, and the second rotary drive device controlling the X-axis rotation of the spray head, a five-axis linkage control is formed. This enables multi-dimensional posture adjustment of the spray head and the workpiece, allowing for precise application to the complex curved surfaces of small toy workpieces for spraying. Manual hand-held spraying is eliminated, improving workpiece qualification rate and consistency. Furthermore, the positioning fixture uses an A-shaped spring clamp combined with a magnetic suction plate for quick workpiece clamping, eliminating the need for manual alignment. After spraying, the drive cylinder of the opening and closing component automatically opens the A-shaped spring clamp. The operator only needs to place the workpiece to be sprayed into the cavity between the upper and lower clamps through the feed window of the machine housing, and then remove the sprayed workpiece through the feed window after the A-shaped spring clamp opens. This avoids continuous close contact with the paint mist environment for the operator, reducing health risks. Furthermore, the X and Y axis displacement mechanisms adopt a combination of gear and rack transmission and guide rail slide, which can achieve high-precision positioning and high-speed translation of the paint spray head. The Z-axis lifting cylinder, in conjunction with the rotary cylinder, drives the pitch angle of the paint spray head, ensuring that the paint spray head and the workpiece surface maintain the optimal spraying distance at all times, further improving the consistency of spraying quality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the five-axis miniature paint sprayer in this application;

[0024] Figure 2 This is a schematic diagram of the structure of the five-axis miniature paint sprayer in this application after removing part of the chassis;

[0025] Figure 3 This is a schematic diagram of the rotating mounting base in this application;

[0026] Figure 4 This is a cross-sectional structural diagram of the positioning fixture in this application.

[0027] Reference numerals: 1. Chassis; 2. Positioning clamp; 21. Rotary mounting base; 22. A-shaped spring clamp; 23. Upper clamping plate; 24. Lower clamping plate; 25. Cavity; 26. Magnetic suction plate; 3. First rotary drive device; 4. Displacement drive device; 41. X-axis displacement mechanism; 411. X-axis guide rail; 412. X-axis slide; 413. X-axis motor; 414. X-axis gear; 415. X-axis rack; 42. Y-axis displacement mechanism; 421. Y-axis guide rail; 422. Y-axis slide; 423. Y-axis motor; 424. Y-axis gear; 425. Y-axis rack; 43. Z-axis displacement mechanism; 5. Second rotary drive device; 6. Feed window; 7. Spray head; 8. Pump body; 9. Exhaust vent; 10. Opening and closing assembly; 101. Drive cylinder; 102. Pressure block. Detailed Implementation

[0028] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0029] It should be noted that the terms "first," "second," etc., used in this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with this disclosure.

[0030] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0031] The following is a reference appendix. Figure 1 To be continued Figure 4 This application describes a five-axis miniature paint sprayer.

[0032] Reference Figures 1 to 4The five-axis miniature spray painting machine includes a chassis 1, a positioning fixture 2, a first rotary drive device 3, a displacement drive device 4, and a second rotary drive device 5. The chassis 1 has a feeding window 6 and a spray head 7 inside. The spray head 7 is connected to a pump body 8, which is connected to an external oil storage device (not shown in the figure). The positioning fixture 2 is set in the chassis 1 and is used to hold the tool and expose the workpiece to be sprayed. The first rotary drive device 3 is connected to the positioning fixture 2 and is used to drive the positioning fixture 2 to rotate along the Y-axis. The displacement drive device 4 is used to drive the spray head 7 to move from the initial position to the spraying station to perform the spray painting operation on the workpiece at the positioning fixture 2. The second rotary drive device 5 is connected to the displacement drive device 4 and is used to drive the spray head 7 to rotate along the X-axis. By distributing the five-axis functions to the Y-axis rotation of the positioning fixture 2, the X-axis rotation of the spray head 7, and the three-axis displacement, fully automatic five-axis spraying can be achieved without manual spraying, reducing the time that operators are exposed to the paint mist environment. Meanwhile, the chassis 1 is equipped with an automated control system, which is connected to the pump body 8, the first rotary drive device 3, the displacement drive device 4 and the second rotary drive device 5. It can perform customized parameter operations, which is very convenient to use and adapts to automated working conditions.

[0033] It should be noted that the chassis 1 is also equipped with an exhaust vent 9, which is connected to an external exhaust system (not shown in the figure). The external exhaust system can remove the residual paint mist inside the chassis 1 to purify the air inside the chassis 1 and reduce the operator's contact with the paint mist environment. The external exhaust system can use conventional dust and dust collection filters, and no specific restrictions are made here.

[0034] Preferably, the positioning fixture 2 includes a rotary mounting base 21 and an A-shaped spring clip 22. The rotary mounting base 21 is connected to the first rotary drive device 3. The A-shaped spring clip 22 is detachably mounted on the rotary mounting base 21. The upper and lower opening ends of the A-shaped spring clip 22 are respectively provided with an upper clamping plate 23 and a lower clamping plate 24. The upper clamping plate 23 and the lower clamping plate 24 are respectively provided with cavities 25 adapted to the shape of the workpiece. The front end of the upper clamping plate 23 and the front end of the lower clamping plate 24 are both provided with protrusions adapted to the shape of the workpiece. The positioning fixture 2 uses a rotary mounting base 21 and an A-shaped spring clip, and provides adapted cavities 25 and protrusions on the clamping plates. The elastic clamping design of the spring clip can avoid the contact deformation caused by traditional rigid fixtures. The protrusions can accurately expose the area to be sprayed. With the Y-axis rotation of the rotary mounting base 21, the workpiece can be sprayed in the full circumference.

[0035] Furthermore, the A-shaped spring clip 22 is made of magnetic material, and a magnetic absorbing piece 26 is provided in the rotating mounting base 21 at the position corresponding to the A-shaped spring clip 22. When the A-shaped spring clip 22 is located in the rotating mounting base 21, the A-shaped spring clip 22 and the magnetic absorbing piece 26 are magnetically attracted to each other. The A-shaped spring clip 22 is made of magnetic material and cooperates with the magnetic absorbing piece 26 of the rotating mounting base 21 to achieve magnetic quick installation, eliminating cumbersome operation steps such as bolt tightening, greatly improving material loading efficiency. At the same time, the magnetic positioning accuracy is high, which can reduce the spraying deviation caused by the position difference of the workpiece.

[0036] Furthermore, the magnetic chuck 26 is inclinedly disposed within the rotary mounting base 21 so that when the A-shaped spring clip 22 and the magnetic chuck 26 are magnetically engaged, both the upper clamping plate 23 and the lower clamping plate 24 are horizontally disposed. By tilting the magnetic chuck 26, the clamping plates are kept horizontal, ensuring that the workpiece is clamped on a uniform horizontal reference plane, which facilitates precise alignment with the coordinates of the XYZ axis displacement system and significantly improves the accuracy and precision of the spraying trajectory planning of the paint spray head 7.

[0037] Preferably, the five-axis miniature spray painting machine also includes an opening and closing component 10, which is used to open the A-shaped spring clip 22 after the spray painting head 7 has completed the spray painting operation, so that there is no need to manually loosen the clip.

[0038] Specifically, the opening and closing assembly 10 includes a drive cylinder 101 and a pressure block 102. The pressure block 102 is fixedly installed on the piston rod end of the drive cylinder 101 and is used to abut against the rear end of the A-shaped spring clip 22 to open the upper and lower opening ends of the A-shaped spring clip 22. The drive cylinder 101 is vertically installed inside the housing 1 and is used to drive the pressure block 102 to move closer to or away from the A-shaped spring clip 22. Before spraying, the A-shaped spring clip 22 holding the workpiece is placed on the rotating mounting base 21, and the A-shaped spring clip 22 does not need to be operated. After spraying, the drive cylinder 101 can drive the pressure block 102 to automatically open the A-shaped spring clip 22 without manual loosening. This avoids the problem of clamp sticking caused by paint residue and realizes the full automation of the unloading process, ensuring seamless connection between the spraying process and the unloading process.

[0039] In this embodiment, the first rotary drive device 3 includes a drive motor, which is fixedly installed inside the housing 1. The output shaft of the drive motor is fixedly connected to the rotary mounting base 21. When the A-shaped spring clip 22 is installed on the rotary mounting base 21, the drive motor is used to drive the A-shaped spring clip 22 to rotate on its own axis. The first rotary drive device 3 uses a drive motor and is coaxially arranged with the rotary mounting base 21, which can provide high-precision power for workpiece rotation. Combined with the X-axis rotation function of the spray gun, dual-axis angle compensation is achieved, and the top surface, side surface, concave surface and other areas of the workpiece can be sprayed without dead angles.

[0040] It should be noted that in the actual design, the rotation axis of the A-shaped spring clip 22 should be coaxial with the output shaft of the drive motor to reduce the spraying deviation caused by the difference in the revolution position of the workpiece. The operator can control the position angle of the A-shaped spring clip 22 when it is fixed by adjusting the shape and size of the rotating mounting base 21 to achieve the design of its rotation axis being coaxial with the output shaft of the drive motor. This will not be elaborated here.

[0041] Preferably, the second rotary drive device 5 includes a rotary cylinder, the piston rod of which is fixedly connected to the paint spray head 7. The rotary cylinder is fixedly installed on the displacement drive device 4, and its installation position is such that it drives the paint spray head 7 to rotate along the X-axis. By using a rotary cylinder to drive the paint spray head 7 to rotate along the X-axis, the paint spray head 7 can be flexibly adjusted within a certain range. For different spraying directions such as vertical surfaces and inclined surfaces of the workpiece, the control system can always maintain the optimal spraying distance of 5-10cm between the paint spray head 7 and the workpiece surface, effectively preventing paint mist diffusion and ensuring uniform paint thickness.

[0042] Preferably, the displacement drive device 4 includes an X-axis displacement mechanism 41, a Y-axis displacement mechanism 42, and a Z-axis displacement mechanism 43 connected in sequence. The X-axis displacement mechanism 41, the Y-axis displacement mechanism 42, and the Z-axis displacement mechanism 43 work together to drive the paint spray head 7 to complete the XYZ three-axis movement inside the housing 1. The second rotary drive device 5 is connected to the Z-axis displacement mechanism 43.

[0043] Specifically, the X-axis displacement mechanism 41 includes an X-axis guide rail 411 disposed along the X-axis inside the housing 1 and an X-axis slide block 412 slidably fitted to the X-axis guide rail 411. An X-axis motor 413 is disposed inside the X-axis slide block 412. An X-axis gear 414 is coaxially disposed on the output shaft of the X-axis motor 413. An X-axis rack 415 for meshing with the X-axis gear 414 is disposed along the X-axis inside the housing 1.

[0044] The Y-axis displacement mechanism 42 includes a Y-axis guide rail 421 disposed along the Y-axis inside the X-axis slide 412 and a Y-axis slide 422 slidably engaged with the Y-axis guide rail 421. A Y-axis motor 423 is disposed inside the X-axis slide 412. A Y-axis gear 424 is coaxially disposed on the output shaft of the Y-axis motor 423. A Y-axis rack 425 for meshing with the Y-axis gear 424 is disposed along the Y-axis inside the housing 1.

[0045] Z-axis displacement mechanism 43 includes a lifting cylinder, which is vertically fixed on the X-axis slide 412, and a second rotary drive device 5 is connected to the piston rod end of the lifting cylinder.

[0046] During operation, the X and Y axes of the displacement drive device 4 adopt gear and rack transmission and guide rail slide structure, while the Z axis adopts a lifting cylinder. The gear and rack transmission of the X and Y axes can provide high-speed translation and high-precision positioning. The Z-axis lifting cylinder enables the paint spray head 7 to quickly rise and fall in the vertical direction to avoid the clamping area. Through the coordinated linkage of these three axes, the paint spray head 7 can complete the complex trajectory movement in three-dimensional space, and easily cope with the complex curved surface spraying requirements such as protrusions and depressions in the height direction of the workpiece.

[0047] The implementation principle of a five-axis micro spray painting machine in this application embodiment is as follows: the three-dimensional spatial movement of the spray head 7 is realized by the displacement drive device 4 in the machine box 1, and the second rotary drive device 5 drives the spray head 7 to rotate along the X-axis to adjust the spraying angle. At the same time, the first rotary drive device 3 drives the positioning fixture 2 to rotate the workpiece along the Y-axis, forming a five-axis linkage control. Before spraying, the workpiece is elastically clamped to the positioning fixture 2 by the A-shaped spring clip 22, with only the area to be sprayed exposed. The magnetic suction plate 26 ensures that the fixture is installed quickly and accurately and the workpiece is on a horizontal reference plane. During spraying, the pump body 8 delivers the paint to the spray head 7. The five-axis coordinated movement makes the spray head 7 and the complex curved surface of the workpiece maintain the best spraying posture and complete the uniform coverage. After the spraying is completed, the drive cylinder 101 of the opening and closing component 10 pushes the pressure block 102 to abut the rear end of the A-shaped spring clip 22, automatically opening the A-shaped spring clip 22 to release the workpiece, completing the entire process of efficient operation from workpiece clamping, multi-dimensional spraying to unloading.

[0048] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A five-axis miniature spray painting machine, characterized in that, include: The machine casing (1) has a feeding window (6) and a paint spray head (7) inside. The paint spray head (7) is connected to a pump body (8), and the pump body (8) is connected to an external oil storage device. Positioning fixture (2), which is set in the housing (1) and is used to hold the tool and expose the workpiece at the position to be sprayed with oil; A first rotary drive device (3) is connected to the positioning fixture (2) and is used to drive the positioning fixture (2) to rotate along the Y-axis. The displacement drive device (4) is used to drive the paint spray head (7) to move from the initial position to the spraying station to perform a painting operation on the workpiece at the positioning fixture (2); The second rotary drive device (5) is connected to the displacement drive device (4) and is used to drive the paint spray head (7) to rotate along the X-axis.

2. The five-axis miniature spray painting machine as described in claim 1, characterized in that, The positioning fixture (2) includes a rotary mounting base (21) and an A-shaped spring clamp (22). The rotary mounting base (21) is connected to the first rotary drive device (3). The A-shaped spring clamp (22) is detachably mounted on the rotary mounting base (21). The upper and lower opening ends of the A-shaped spring clamp (22) are respectively provided with an upper clamping plate (23) and a lower clamping plate (24). The upper clamping plate (23) and the lower clamping plate (24) are respectively provided with cavities (25) adapted to the shape of the workpiece. The front end of the upper clamping plate (23) and the front end of the lower clamping plate (24) are both provided with protrusions adapted to the shape of the workpiece.

3. A five-axis miniature spray painting machine as described in claim 2, characterized in that, The A-shaped spring clip (22) is made of magnetic material. A magnetic piece (26) is provided in the rotating mounting base (21) corresponding to the position of the A-shaped spring clip (22). When the A-shaped spring clip (22) is located in the rotating mounting base (21), the A-shaped spring clip (22) and the magnetic piece (26) are magnetically attracted to each other.

4. A five-axis miniature spray painting machine as described in claim 3, characterized in that, The magnetic accumulator (26) is inclined inside the rotating mounting base (21) so that when the A-shaped spring clip (22) and the magnetic accumulator (26) are magnetically engaged, the upper clamping plate (23) and the lower clamping plate (24) are both horizontally positioned.

5. A five-axis miniature spray painting machine as described in claim 2, characterized in that, It also includes an opening and closing assembly (10), which is used to open the A-shaped spring clip (22) after the paint spraying head (7) has completed the painting operation.

6. A five-axis miniature spray painting machine as described in claim 5, characterized in that, The opening and closing assembly (10) includes a drive cylinder (101) and a pressure block (102). The pressure block (102) is fixedly installed on the piston rod end of the drive cylinder (101) and is used to abut against the rear end of the A-shaped spring clip (22) to open the upper and lower opening ends of the A-shaped spring clip (22). The drive cylinder (101) is vertically installed inside the chassis (1) and is used to drive the pressure block (102) to move closer to or away from the A-shaped spring clip (22).

7. A five-axis miniature spray painting machine as described in claim 2, characterized in that, The first rotary drive device (3) includes a drive motor, which is fixedly installed inside the housing (1). The output shaft of the drive motor is fixedly connected to the rotary mounting base (21). When the A-shaped spring clip (22) is installed on the rotary mounting base (21), the drive motor is used to drive the A-shaped spring clip (22) to rotate from the shaft.

8. A five-axis miniature spray painting machine as described in claim 1, characterized in that, The second rotary drive device (5) includes a rotary cylinder, the piston rod of which is fixedly connected to the paint spray head (7). The rotary cylinder is fixedly installed on the displacement drive device (4) and its installation position satisfies the requirement of driving the paint spray head (7) to rotate along the X-axis.

9. A five-axis miniature spray painting machine as described in claim 1, characterized in that, The displacement drive device (4) includes an X-axis displacement mechanism (41), a Y-axis displacement mechanism (42), and a Z-axis displacement mechanism (43) connected in sequence. The X-axis displacement mechanism (41), the Y-axis displacement mechanism (42), and the Z-axis displacement mechanism (43) work together to drive the paint spray head (7) to complete the XYZ three-axis movement inside the housing (1). The second rotary drive device (5) is connected to the Z-axis displacement mechanism (43).

10. A five-axis miniature spray painting machine as described in claim 9, characterized in that, The X-axis displacement mechanism (41) includes an X-axis guide rail (411) arranged along the X-axis inside the housing (1) and an X-axis slide (412) slidably fitted to the X-axis guide rail (411). An X-axis motor (413) is arranged inside the X-axis slide (412). An X-axis gear (414) is coaxially arranged on the output shaft of the X-axis motor (413). An X-axis rack (415) for meshing with the X-axis gear (414) is arranged along the X-axis inside the housing (1). The Y-axis displacement mechanism (42) includes a Y-axis guide rail (421) arranged along the Y-axis inside the X-axis slide (412) and a Y-axis slide (422) slidably fitted with the Y-axis guide rail (421). A Y-axis motor (423) is arranged inside the X-axis slide (412). A Y-axis gear (424) is coaxially arranged on the output shaft of the Y-axis motor (423). A Y-axis rack (425) for meshing with the Y-axis gear (424) is arranged along the Y-axis inside the housing (1). The Z-axis displacement mechanism (43) includes a lifting cylinder, which is vertically fixed on the X-axis slide (412), and a second rotary drive device (5) is connected to the piston rod end of the lifting cylinder.

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