An automated automotive spraying system and spraying method

Abstract

The present invention discloses an automated vehicle spraying system, which includes an articulated robotic arm, a rotary drive mechanism and a variable rotary cup mechanism; the variable rotary cup mechanism includes a main shaft, an outer cover, a piezoelectric telescopic ring, a first flexible cup, a second flexible cup and a blocking cover; the outer cover, the first flexible cup and the second flexible cup are all in a conical structure; the piezoelectric telescopic ring is used to drive the outer cover to slide, and air holes are evenly distributed on the conical surface of the first flexible cup; a containing cavity is formed between the first flexible cup, the outer cover and the main shaft, a spiral elastic skeleton is arranged in the containing cavity, spherical particles are filled in the containing cavity, and the cross-sectional area of the elastic skeleton gradually decreases from inside to outside; there is a gap between the outer conical surface of the second flexible cup and the inner conical surface of the first flexible cup in the natural state, a flow guiding convex block is arranged on the inner conical surface of the second flexible cup, and a spiral flow guiding groove is formed between adjacent flow guiding convex blocks; the present invention is suitable for spraying different coatings, does not need to stop the line to replace the atomization equipment, and is beneficial to improving the spraying production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive spraying, and particularly to an automated automotive spraying system. Background Art

[0002] Existing automotive spraying devices splash paint onto the guiding cone surface of a rotary cup atomizer, and after passing through the guiding cone surface, spray it onto the target workpiece to obtain stable atomization effect and color stability. And automotive painting is a process that requires spraying multiple coats of paint, such as primer, topcoat, and clear coat, and there are various forms of paint, such as ordinary paint, metallic paint, pearlescent paint, matte paint, etc.

[0003] However, the guiding surface of the existing rotary cup atomizer is a fixed structure, and its physical parameters cannot be changed; and the solvent volatility and fluidity of different paints are different. Therefore, if the properties of the sprayed paints vary greatly, it is necessary to stop the line to replace the rotary cup atomizer, resulting in a reduction in the efficiency of spraying production. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned drawbacks and provide an automated automotive spraying system with high spraying production efficiency.

[0005] To achieve the above purpose, the specific solution of the present invention is as follows:

[0006] An automated automotive spraying system includes an articulated robotic arm, a rotary drive mechanism, and a variable rotary cup mechanism; the rotary drive mechanism is installed at the output end of the articulated robotic arm.

[0007] The variable rotary cup mechanism includes a main shaft, an outer cover, a piezoelectric stack ring, a first flexible cup, a second flexible cup, and a blocking cover.

[0008] One end of the main shaft is connected to the output end of the rotary drive mechanism, the main shaft is axially provided with a first spraying channel, and the main shaft is circumferentially provided with a plurality of air channels in the first spraying channel. The outer cover, the first flexible cup, and the second flexible cup are all in a conical structure.

[0009] The small end of the outer cover is movably sleeved on the outer wall of the main shaft, the piezoelectric stack ring is sleeved on the outer wall of the main shaft and is used to drive the outer cover to slide. The small end of the first flexible cup is fixedly connected to the other end of the main shaft, the large end of the first flexible cup is fixedly connected to the large end of the outer cover, and air holes are evenly distributed on the conical surface of the first flexible cup.

[0010] A receiving cavity communicating with each air passage is formed among the first flexible cup, the outer cover, and the main shaft. A plurality of spiral elastic skeletons are arranged in the receiving cavity. One end of the elastic skeleton is fixedly connected to the other end of the main shaft, and the other end of the elastic skeleton is fixedly connected to the large end of the outer cover. The receiving cavity is filled with spherical particles in a flowing state in the natural state, and the cross-sectional area of the elastic skeleton gradually decreases from the inside to the outside;

[0011] The small end of the second flexible cup penetrates through the first flexible cup and is fixedly connected to the other end of the main shaft. There is a gap between the outer conical surface of the second flexible cup and the inner conical surface of the first flexible cup in the natural state. A plurality of guide convex blocks are arranged along the circumference of the edge of the inner conical surface of the second flexible cup, and a spiral guide groove is formed between adjacent two of the guide convex blocks. The small end of the second flexible ring is provided with a second spraying channel communicating with the first spraying channel;

[0012] The blocking cover is fixedly connected to the small end of the second flexible cup. The blocking cover is provided with a third spraying channel communicating with the second spraying channel, and spraying holes communicating with the third spraying channel are evenly distributed in the circumferential direction of the third spraying channel.

[0013] For an automatic vehicle spraying system provided by the present invention, a plurality of sliding columns are convexly arranged on the outer conical surface of the first flexible cup corresponding to each elastic skeleton, and the elastic skeleton movably passes through the corresponding sliding columns.

[0014] For an automatic vehicle spraying system provided by the present invention, the wall thickness of the second flexible cup is smaller than the wall thickness of the first flexible cup.

[0015] For an automatic vehicle spraying system provided by the present invention, the main shaft includes an integrally formed first shaft body and a first disc body. One end of the first shaft body is connected to the output end of the rotary drive mechanism, and the other end of the first shaft body is connected to the first disc body; the first spraying channel penetrates through the first shaft body and the first disc body, the air passage penetrates through the first shaft body and the first disc body, the outer cover is slidably sleeved on the first shaft body, the piezoelectric telescopic ring is arranged between the first disc body and the outer cover, one end of the elastic skeleton is fixedly connected to the outer wall of the first disc body, the small end of the first flexible cup is fixedly connected to the disc surface of the first disc body facing away from the first shaft body, and the small end of the second flexible cup is fixed at the center of the first disc body.

[0016] For an automatic vehicle spraying system provided by the present invention, an annular groove is provided on the end surface of the first shaft body, and the annular groove communicates with each air passage.

[0017] For an automatic vehicle spraying system provided by the present invention, the outer cover also has a profile fit with the first shaft body.

[0018] An automated vehicle spraying system provided by the present invention, wherein the blocking cover includes an integrally formed second shaft body and a second disc body. One end of the second shaft body is connected to the small end of the second flexible cup, and the other end of the second shaft body is connected to the second disc body. The third spraying channel is provided on the second shaft body. The disc surface of the second disc body facing the second shaft body is provided with a receiving groove communicating with the spraying holes, and the bottom of the receiving groove is a parabolic surface.

[0019] An automated vehicle spraying system provided by the present invention, wherein diversion inclined surfaces are respectively provided at both ends of the diversion groove.

[0020] An automated vehicle spraying system provided by the present invention, wherein a connecting portion protrudes from the small end of the second flexible cup. The connecting portion is fixedly inserted into the other end of the main shaft. The second spraying channel penetrates through the connecting portion, and a flexible ring is also connected between the connecting portion and the main shaft.

[0021] The beneficial effects of the present invention are as follows: 1. By forming a receiving cavity filled with spherical particles between the outer cover and the first flexible cup, and arranging an elastic framework in the receiving cavity, with the cross-sectional area of the elastic framework gradually decreasing from the inside to the outside, under the drive of the piezoelectric telescopic ring, the deformation amount of the large end of the first flexible cup is greater than that of its small end, thereby changing the effective flow path of the inner conical surface of the second flexible cup during spraying, achieving the effect of controlling the paint dehydration rate, adapting to the spraying of different paints, eliminating the need to stop the line to replace the atomization equipment, and facilitating the improvement of the spraying production efficiency.

[0022] 2. By arranging a spiral diversion groove on the inner conical surface of the second flexible cup, different atomization effects can be achieved by controlling the rotation direction of the second flexible cup, effectively expanding the applicable range of the atomized particle size of the paint.

[0023] 3. By changing the effective flow path of the inner conical surface of the second flexible cup, the outlet direction of the diversion groove can also be changed, and then the dispersion area of the paint mist formed after paint atomization can be controlled, improving the flexibility of the spraying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of the present invention;

[0025] Figure 2 is a schematic structural view of the variable rotary cup mechanism of the present invention;

[0026] Figure 3 is a schematic structural view of the variable rotary cup mechanism from another perspective of the present invention;

[0027] Figure 4 is a schematic cross-sectional view of the variable rotary cup mechanism of the present invention;

[0028] Figure 5It is an exploded schematic view of the variable cup mechanism of the present invention;

[0029] Figure 6 It is a sectional schematic view of the main shaft of the present invention;

[0030] Figure 7 It is a sectional schematic view of the first flexible cup of the present invention;

[0031] Figure 8 It is a sectional schematic view of the second flexible cup of the present invention;

[0032] Figure 9 It is a sectional schematic view of the blocking cover of the present invention;

[0033] Explanation of reference numerals: 1, articulated robotic arm; 2, rotary drive mechanism; 3, variable cup mechanism; 31, main shaft; 311, first shaft body; 312, first disc body; 313, first spraying channel; 314, air duct; 315, annular groove; 32, outer cover; 33, piezoelectric stack ring; 34, first flexible cup; 341, air hole; 342, sliding column; 35, second flexible cup; 351, guiding convex block; 352, guiding groove; 353, second spraying channel; 354, guiding inclined surface; 36, blocking cover; 361, second shaft body; 362, second disc body; 363, third spraying channel; 364, spraying hole; 365, accommodating groove; 37, accommodating cavity; 38, elastic skeleton; 39, flexible ring. Detailed implementation manners

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the scope of implementation of the present invention is not limited thereto.

[0035] As Figures 1 to 9 shown, an automated vehicle spraying system described in this embodiment includes an articulated robotic arm 1, a rotary drive mechanism 2, and a variable cup mechanism 3; the rotary drive mechanism 2 is installed on the output end of the articulated robotic arm 1;

[0036] The variable rotary cup mechanism 3 includes a main shaft 31, an outer cover 32, a piezoelectric telescopic ring 33, a first flexible cup 34, a second flexible cup 35 and a blocking cover 36; one end of the main shaft 31 is connected to the output end of the rotary driving mechanism 2, the main shaft 31 is axially provided with a first spraying channel 313, and the main shaft 31 is circumferentially provided with a plurality of air channels 314 around the first spraying channel 313. The outer cover 32, the first flexible cup 34 and the second flexible cup 35 are all in a conical structure; the small end of the outer cover 32 is movably sleeved on the outer wall of the main shaft 31, the piezoelectric telescopic ring 33 is sleeved on the outer wall of the main shaft 31 and is used to drive the outer cover 32 to slide. The small end of the first flexible cup 34 is fixedly connected to the other end of the main shaft 31, the large end of the first flexible cup 34 is fixedly connected to the large end of the outer cover 32, and air holes 341 are uniformly distributed on the conical surface of the first flexible cup 34; a containing cavity 37 communicating with each air channel 314 is formed among the first flexible cup 34, the outer cover 32 and the main shaft 31. A plurality of spiral elastic skeletons 38 are arranged in the containing cavity 37. One end of the elastic skeleton 38 is fixedly connected to the other end of the main shaft 31, and the other end of the elastic skeleton 38 is fixedly connected to the large end of the outer cover 32. The containing cavity 37 is filled with spherical particles in a flowing state in the natural state, and the cross-sectional area of the elastic skeleton 38 gradually decreases from inside to outside; the small end of the second flexible cup 35 penetrates through the first flexible cup 34 and is fixedly connected to the other end of the main shaft 31. There is a gap between the outer conical surface of the second flexible cup 35 and the inner conical surface of the first flexible cup 34 in the natural state. A plurality of guide convex blocks 351 are arranged along the circumferential direction on the edge of the inner conical surface of the second flexible cup 35, and a spiral guide groove 352 is formed between two adjacent guide convex blocks 351. The small end of the second flexible ring 39 is provided with a second spraying channel 353 communicating with the first spraying channel 313; the blocking cover 36 is fixedly connected to the small end of the second flexible cup 35, the blocking cover 36 is provided with a third spraying channel 363 communicating with the second spraying channel 353, and spraying holes 364 communicating with the third spraying channel 363 are uniformly distributed around the third spraying channel 363 on the blocking cover 36.

[0037] In this embodiment, the rotary driving mechanism 2 is a motor, the first spraying channel 313 is communicated with an external paint pipeline, and the first air channel 314 is communicated with an external vacuum generator.

[0038] The working mode of this embodiment is as follows: During operation, the articulated robotic arm 1 drives the variable rotary cup mechanism 3 to move through the rotary drive mechanism 2, thereby adjusting the position of the variable rotary cup mechanism 3. After the position adjustment of the variable rotary cup mechanism 3 is completed, the rotary drive mechanism 2 drives the variable rotary cup mechanism 3 to rotate at a high speed. At the same time, the external vacuum generator discharges the air in the accommodation cavity 37 through the air duct 314. Since there is a certain gap between the outer conical surface of the second flexible cup 35 and the inner conical surface of the first flexible cup 34, the Bernoulli effect is generated at this gap. Under the action of the air flow, the second flexible cup 35 will adhere to the inner conical surface of the first flexible cup 34, closing each air hole 341 on the first flexible cup 34. After the air holes 341 are closed by the second flexible cup 35, the air in the accommodation cavity 37 is discharged by the external vacuum generator, causing the spherical particles in the accommodation cavity 37 to transform from a flowing state to a rigid state, and tightly holding and shaping the elastic skeleton 38 in the accommodation cavity 37; After the shaping is completed, the external paint pipeline transports paint into each spraying hole 364 through the first spraying channel 313, the second spraying channel 353, and the third spraying channel 363. Under the action of centrifugal force, the paint splashes from each spraying hole 364 onto the inner conical surface of the second flexible cup 35;

[0039] The paint splashed onto the inner conical surface of the second flexible cup 35 flows along the edge of the inner conical surface of the second flexible cup 35 into the diversion groove 352 under the action of centrifugal force. Since the diversion groove 352 exerts pressure on the paint, the flow pressure of the paint rises, causing the paint to flow out of the diversion groove 352 at a high speed. When the rotation direction of the second flexible cup 35 is the same as the spiral direction of the diversion groove 352, the squeezing force of the groove wall of the diversion groove 352 on the paint in the diversion groove 352 is the same as the flow direction of the paint, increasing the flow rate of the paint, thereby improving the atomization effect of the paint. When the rotation direction of the second flexible cup 35 is opposite to the spiral direction of the diversion groove 352, the squeezing force of the groove wall of the diversion groove 352 on the paint in the diversion groove 352 is opposite to the flow direction of the paint, reducing the flow rate of the paint, thereby forming an atomization effect with larger atomization particles;

[0040] When it is necessary to adjust the shape of the diversion bump 351, an external vacuum generator injects air into the accommodation cavity 37, causing the spherical particles to return to a flowing state. Then, the piezoelectric telescopic ring 33 drives the outer cover 32 to move towards the blocking cover 36. Since the cross-sectional area of the elastic framework 38 gradually decreases from the inside to the outside, the deformation amount on the outside of the elastic framework 38 is greater than that on the inside, causing the curvature radius of the large end of the first flexible cup 34 to decrease. Then, the external vacuum generator discharges the air in the accommodation cavity 37 again, causing the second flexible cup 35 to abut against the inner conical surface of the first flexible cup 34, closing the air hole 341. The spherical particles in the accommodation cavity 37 are blocked again, shaping the elastic framework 38. The second flexible cup 35 abuts against the inner conical surface of the first flexible cup 34 again under the action of the air flow, further increasing the effective flow path of the inner conical surface of the second flexible cup 35, thereby achieving the purpose of controlling the paint dehydration rate. Then, the paint is sprayed.

[0041] In this embodiment, an accommodation cavity 37 filled with spherical particles is formed between the outer cover 32 and the first flexible cup 34, and an elastic framework 38 is arranged in the accommodation cavity 37. The cross-sectional area of the elastic framework 38 gradually decreases from the inside to the outside. Thus, under the drive of the piezoelectric telescopic ring 33, the deformation amount of the large end of the first flexible cup 34 is greater than that of its small end, thereby changing the effective flow path of the inner conical surface of the second flexible cup 35 during spraying, achieving the effect of controlling the paint dehydration rate, adapting to the spraying of different paints, and eliminating the need to stop the line to replace the atomization equipment, which is conducive to improving the spraying production efficiency.

[0042] In this embodiment, a spiral diversion groove 352 is arranged on the inner conical surface of the second flexible cup 35. Thus, different atomization effects can be achieved by controlling the rotation direction of the second flexible cup 35, effectively increasing the applicable range of the paint atomization particle size.

[0043] In this embodiment, by changing the effective flow path of the inner conical surface of the second flexible cup 35, the outlet direction of the diversion groove 352 can also be changed, and thus the dispersion area of the paint mist formed after paint atomization can be controlled, improving the flexibility of the spraying process.

[0044] As Figures 4 to 5 、 Figure 7 shown, based on the above embodiments, further, a plurality of sliding columns 342 are convexly arranged on the outer conical surface of the first flexible cup 34 corresponding to each elastic framework 38, and the elastic framework 38 movably passes through the corresponding sliding columns 342. In this embodiment, by slidably sleeving the sliding columns 342 and the elastic framework 38, the responsiveness of the first flexible cup 34 during deformation is improved.

[0045] As Figure 4As shown, based on the above embodiments, further, the wall thickness of the second flexible cup 35 is smaller than that of the first flexible cup 34. With such a setting, the second flexible cup 35 can adaptively adhere to the inner conical surface of the first flexible cup 34 under the action of air flow, and the adjustment of the effective flow path of the inner conical surface of the second flexible cup 35 is more sensitive.

[0046] As Figures 4 to 6 shown, based on the above embodiments, further, the main shaft 31 includes an integrally formed first shaft body 311 and a first disc body 312. One end of the first shaft body 311 is connected to the output end of the rotary drive mechanism 2, and the other end of the first shaft body 311 is connected to the first disc body 312; the first spraying channel 313 penetrates through the first shaft body 311 and the first disc body 312, the air duct 314 penetrates through the first shaft body 311 and the first disc body 312, the outer cover 32 is slidably sleeved on the first shaft body 311, the piezoelectric telescopic ring 33 is arranged between the first disc body 312 and the outer cover 32, one end of the elastic skeleton 38 is fixedly connected to the outer wall of the first disc body 312, the small end of the first flexible cup 34 is fixedly connected to the disc surface of the first disc body 312 facing away from the first shaft body 311, and the small end of the second flexible cup 35 is fixed at the center of the first disc body 312. In this embodiment, the first shaft body 311 and the first disc body 312 are provided to facilitate the installation of the outer cover 32, the piezoelectric telescopic ring 33, the elastic skeleton 38, the first flexible cup 34, and the second flexible cup 35.

[0047] As Figure 4 、 Figure 6 shown, based on the above embodiments, further, an annular groove 315 is provided on the end surface of the first shaft body 311, and the annular groove 315 communicates with each air duct 314. In this embodiment, the annular groove 315 is provided so that each air duct 314 can communicate with an external vacuum generator through the annular groove 315, and the assembly is more convenient.

[0048] In this embodiment, the outer cover 32 also has a profile fit with the first shaft body 311. With such a setting in this embodiment, relative rotation of the outer cover 32 relative to the first shaft body 311 during rotation is prevented, and the structure is more reliable.

[0049] As Figure 4 、 Figure 5 and Figure 9As shown, based on the above embodiments, further, the blocking cover 36 includes an integrally formed second shaft body 361 and a second disc body 362. One end of the second shaft body 361 is connected to the small end of the second flexible cup 35, and the other end of the second shaft body 361 is connected to the second disc body 362. The third spraying channel 363 is provided on the second shaft body 361. The disc surface of the second disc body 362 facing the second shaft body 361 is provided with a receiving groove 365 communicating with the spraying holes 364, and the bottom of the receiving groove 365 is a paraboloid. In this embodiment, by providing the receiving groove 365 with a paraboloid bottom, the paint flowing out of each spraying hole 364 first enters the receiving groove 365 for storage, and then splashes onto the inner conical surface of the second flexible cup 35 under the action of centrifugal force. In this way, the influence of the pressure fluctuation in the external paint pipeline on the paint flow rate can be avoided, and the stability of paint atomization can be improved.

[0050] As Figure 4 and Figure 8 shown, based on the above embodiments, further, diversion inclined surfaces 354 are respectively provided at both ends of the diversion groove 352. In this embodiment, by providing the diversion inclined surfaces 354, a diversion effect is formed on the paint. The paint enters the diversion groove 352 through the diversion inclined surface 354 at the inlet end of the diversion groove 352, further increasing the flow pressure formed on the paint. After passing through the diversion groove 352, it flows out from the diversion inclined surface 354 at the outlet end of the diversion groove 352, causing the high-speed flowing paint to break and disperse into small droplets, further improving the atomization effect.

[0051] As Figure 4 、 Figure 5 and Figure 8 shown, based on the above embodiments, further, a connecting portion protrudes from the small end of the second flexible cup 35. The connecting portion is fixedly inserted into the other end of the main shaft 31. The second spraying channel 353 penetrates through the connecting portion, and a flexible ring 39 is also connected between the connecting portion and the main shaft 31. In this embodiment, by providing the connecting portion, the installation of the second flexible cup 35 and the blocking cover 36 is facilitated. By providing the flexible ring 39, the sealing performance between the connecting portion and the main shaft 31 is ensured, and paint leakage is avoided.

[0052] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features, and principles described in the scope of this invention patent application are included in the protection scope of this invention patent application.

Claims

1. An automated automotive spraying system, characterized in that, It includes a joint robotic arm (1), a rotary drive mechanism (2), and a variable rotary cup mechanism (3); the rotary drive mechanism (2) is installed on the output end of the joint robotic arm (1); The variable rotary cup mechanism (3) includes a main shaft (31), an outer cover (32), a piezoelectric telescopic ring (33), a first flexible cup (34), a second flexible cup (35), and a blocking cover (36); One end of the main shaft (31) is connected to the output end of the rotary drive mechanism (2). The main shaft (31) is axially provided with a first spraying channel (313). The main shaft (31) is circumferentially provided with a plurality of air channels (314). The outer cover (32), the first flexible cup (34), and the second flexible cup (35) are all in a conical structure; The small end of the outer cover (32) is movably sleeved on the outer wall of the main shaft (31). The piezoelectric telescopic ring (33) is sleeved on the outer wall of the main shaft (31) and is used to drive the outer cover (32) to slide. The small end of the first flexible cup (34) is fixedly connected to the other end of the main shaft (31). The large end of the first flexible cup (34) is fixedly connected to the large end of the outer cover (32). Air holes (341) are evenly distributed on the conical surface of the first flexible cup (34); A containing cavity (37) communicating with each air channel (314) is formed among the first flexible cup (34), the outer cover (32), and the main shaft (31). A plurality of spiral elastic skeletons (38) are arranged in the containing cavity (37). One end of the elastic skeleton (38) is fixedly connected to the other end of the main shaft (31), and the other end of the elastic skeleton (38) is fixedly connected to the large end of the outer cover (32). The containing cavity (37) is filled with spherical particles in a flowing state in the natural state. The cross-sectional area of the elastic skeleton (38) gradually decreases from inside to outside; The small end of the second flexible cup (35) penetrates through the first flexible cup (34) and is fixedly connected to the other end of the main shaft (31). There is a gap between the outer conical surface of the second flexible cup (35) and the inner conical surface of the first flexible cup (34) in the natural state. A plurality of guide convex blocks (351) are arranged along the circumference of the inner conical surface of the second flexible cup (35). A spiral guide groove (352) is formed between adjacent two guide convex blocks (351). The small end of the second flexible cup (35) is provided with a second spraying channel (353) communicating with the first spraying channel (313); The blocking cover (36) is fixedly connected to the small end of the second flexible cup (35). The blocking cover (36) is provided with a third spraying channel (363) communicating with the second spraying channel (353). Spraying holes (364) communicating with the third spraying channel (363) are evenly distributed on the circumference of the blocking cover (36) in the circumferential direction of the third spraying channel (363).

2. An automated vehicle spraying system according to claim 1, wherein A plurality of sliding columns (342) are convexly arranged on the outer conical surface of the first flexible cup (34) corresponding to each elastic skeleton (38). The elastic skeleton (38) movably passes through the corresponding sliding column (342).

3. An automated automotive spraying system according to claim 1, wherein, The wall thickness of the second flexible cup (35) is smaller than the wall thickness of the first flexible cup (34).

4. An automated vehicle spraying system according to claim 1, wherein, The main shaft (31) comprises an integrally formed first shaft body (311) and a first disk body (312); one end of the first shaft body (311) is connected to the output end of the rotary drive mechanism (2), and the other end of the first shaft body (311) is connected to the first disk body (312); the first spraying channel (313) runs through the first shaft body (311) and the first disk body (312); the air channel (314) runs through the first shaft body (311) and the first disk body (312); The outer cover (32) is slidably sleeved on the first shaft (311), the piezoelectric telescopic ring (33) is arranged between the first disk (312) and the outer cover (32), one end of the elastic skeleton (38) is fixedly connected to the outer wall of the first disk (312), the small end of the first flexible cup (34) is fixedly connected to the disk surface of the first disk (312) facing away from the first shaft (311), and the small end of the second flexible cup (35) is fixed on the center of the first disk (312).

5. An automated automotive spraying system according to claim 4, wherein, An annular groove (315) is provided on the end surface of the first shaft body (311), and the annular groove (315) is communicated with each air passage (314).

6. An automated vehicle spraying system according to claim 4, wherein, The outer cover (32) is also profile-matched with the first shaft body (311).

7. An automated automotive spraying system according to claim 1, characterized in that, The blocking cover (36) comprises an integrally formed second shaft body (361) and a second disk body (362), one end of the second shaft body (361) is connected to the small end of the second flexible cup (35), and the other end of the second shaft body (361) is connected to the second disk body (362), the third spraying channel (363) is arranged on the second shaft body (361), and the disk surface of the second disk body (362) facing the second shaft body (361) is provided with a receiving groove (365) connected to the spraying hole (364), and the bottom of the receiving groove (365) is a parabola.

8. An automated vehicle spraying system according to claim 1, characterized in that, Both ends of the guide groove (352) are respectively provided with guide slopes (354).

9. An automated vehicle spraying system according to claim 1, characterized in that, A connecting portion is convexly provided at the small end of the second flexible cup (35), and the connecting portion is fixedly plugged into the other end of the main shaft (31). The second spraying channel (353) passes through the connecting portion, and a flexible ring (39) is also connected between the connecting portion and the main shaft (31).

10. A spraying method applied to the automated vehicle spraying system according to any one of claims 1 to 9, characterized in that, The steps include: S100: The joint mechanical arm (1) adjusts the position of the variable bell mechanism (3) through the rotating drive mechanism (2). After the position adjustment of the variable bell mechanism (3) is completed, the rotating drive mechanism (2) drives the variable bell mechanism (3) to rotate at a high speed. The external vacuum generator discharges the air in the accommodating chamber (37) through the air passage (314). Under the action of the airflow, the second flexible cup (35) is attached to the inner conical surface of the first flexible cup (34), and each air hole (341) on the first flexible cup (34) is closed. The spherical particles in the accommodating chamber (37) are transformed from a flowing state to a rigid state, and the elastic skeleton (38) is tightly held and shaped. S200: After shaping is completed, an external paint pipeline transports paint into each spraying hole (364) through a first spraying channel (313), a second spraying channel (353), and a third spraying channel (363). Under the action of centrifugal force, the paint splashes from each spraying hole (364) onto the inner conical surface of the second flexible cup (35) and flows along the inner conical surface of the second flexible cup (35) into the diversion groove (352), and the paint flows out of the diversion groove (352) at high speed; S300: When the rotation direction of the second flexible cup (35) is the same as the spiral direction of the diversion groove (352), the extrusion force of the groove wall of the diversion groove (352) on the paint in the diversion groove (352) is the same as the flow direction of the paint, increasing the flow rate of the paint; Or, when the rotation direction of the second flexible cup (35) is opposite to the spiral direction of the diversion groove (352), the extrusion force of the groove wall of the diversion groove (352) on the paint in the diversion groove (352) is opposite to the flow direction of the paint, reducing the flow velocity of the paint; S400: When it is necessary to adjust the shape of the diversion bump (351), an external vacuum generator injects air into the accommodation cavity (37) to make the spherical particles return to a flowing state. Then, the piezoelectric telescopic ring (33) drives the outer cover (32) to move towards the blocking cover (36), and the elastic framework (38) deforms, reducing the radius of curvature of the large end of the first flexible cup (34); Then, the external vacuum generator discharges the air in the accommodation cavity (37) again, making the second flexible cup (35) abut against the inner conical surface of the first flexible cup (34), closing the air hole (341), and shaping the elastic framework (38). The second flexible cup (35) abuts against the inner conical surface of the first flexible cup (34) under the action of air flow, increasing the effective flow path of the inner conical surface of the second flexible cup (35), thereby achieving the purpose of controlling the paint dehydration rate, and then the paint spraying is carried out.

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