Manipulator spraying device

Abstract

A mechanical arm spraying device relates to the technical field of mechanical spraying and comprises a base, a mechanical arm and a rotating support, the two ends of the rotating support are provided with a first rotating frame and a second rotating frame which are used for placing different workpieces respectively, and the first rotating frame is located above the second rotating frame. The first rotating frame can turn over up and down in the vertical direction relative to the rotating support, and the second rotating frame can rotate left and right in the horizontal direction relative to the rotating support. By the adoption of the technical scheme, workpieces in different shapes are fixed through the first rotating frame and the second rotating frame, products in different shapes can be sprayed through the mechanical arm, therefore, the spraying requirements of different workpieces are met, the flexibility of a production line is improved, the first rotating frame is easy and convenient to disassemble, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical spraying technical field, concretely relates to a mechanical hand spraying device. BACKGROUND

[0002] The spraying machine is a kind of coating equipment widely used in building, aviation, automobile, furniture and other fields, mainly used to spray coating at high speed to the surface of the object to be coated, and form uniform, smooth coating.

[0003] In the prior art, such as CN112916255A discloses a rotary frame with spraying manipulator, including fixed base, manipulator and rotary support, the outer end of rotary support is provided with two workpiece placing devices for placing workpieces to be sprayed, two workpiece placing devices are located on the outer side of manipulator and symmetrically arranged with manipulator as center line. However, this rotary frame with spraying manipulator can usually only fix a single workpiece, so that when different shapes of products need to be processed, it cannot meet the demand, and the flexibility of production line is reduced. SUMMARY

[0004] The utility model aims at solving the problem that the rotary frame with spraying manipulator in the prior art can usually only fix a single product, cannot meet the fixing and spraying demand of different shapes of products, and leads to low flexibility of production line, and the utility model provides a mechanical hand spraying device.

[0005] The technical scheme adopted by the utility model is: a mechanical hand spraying device, including base, manipulator and rotary support, both ends of rotary support are provided with first rotary frame and second rotary frame for placing different workpieces respectively, first rotary frame is located above second rotary frame, first rotary frame can be flipped up and down along vertical direction relative to rotary support, second rotary frame can be rotated left and right along horizontal direction relative to rotary support.

[0006] Optionally, the first rotary frame includes a first frame rotatably arranged on the rotary support, a bearing frame detachably connected to the first frame, and a quick-release structure arranged between the first frame and the bearing frame, and the bearing frame is uniformly distributed with elastic clamping blocks for placing workpieces to be sprayed.

[0007] Optionally, the number of quick-release structures is two groups, and the two groups of quick-release structures are symmetrically arranged on both sides of the first frame and the bearing frame.

[0008] The quick release structure comprises a positioning column arranged at one end of the first frame, a sliding block slidingly arranged on the side wall of the positioning column, a first plug-in block arranged outside the sliding block and used for plug-in cooperation with one end of the bearing frame, a second plug-in block arranged at the other end of the first frame and used for plug-in cooperation with the other end of the first frame, and an elastic member arranged in the positioning column and used for providing elastic force to the sliding block to enable the two ends of the bearing frame to be stably matched with the first plug-in block and the second plug-in block respectively, wherein the positioning column is provided with a sliding groove along the length direction of the positioning column, and the sliding block is slidingly matched with the sliding groove.

[0009] Optionally, the elastic member comprises a spring arranged in the positioning column, the positioning column is provided with a containing groove in communication with the sliding groove and used for containing the spring, one end of the spring is abutted against the inner wall of the containing groove, and the other end of the spring is abutted against the sliding block.

[0010] Optionally, the elastic clamping block comprises a U-shaped portion and two elastic arms respectively arranged at two ends of the opening of the U-shaped portion, one side of the U-shaped portion away from the opening thereof is fixedly connected to the bearing frame, and the distance between the two elastic arms is greater than the size of the opening of the U-shaped portion.

[0011] Optionally, the distance between the two elastic arms gradually increases from the direction close to the U-shaped portion to the direction away from the U-shaped portion.

[0012] Optionally, the rotating support comprises a rotating plate rotatingly arranged on the base, two fixing seats respectively arranged at two ends of the rotating plate, and a C-shaped frame arranged outside the fixing seat, the middle portion of the rotating plate is rotatingly connected to the base, the two ends of the rotating plate extend outward along the horizontal direction, the second rotating frame is rotatingly arranged on the fixing seat, the two ends of the first rotating frame are respectively rotatingly connected to the two inner walls of the C-shaped frame, and the first rotating frame and the second rotating frame are located in the opening of the C-shaped frame.

[0013] Optionally, the mechanical arm spraying device further comprises a first driving assembly used for driving the first rotating frame to flip up and down along the vertical direction relative to the rotating support.

[0014] The first driving assembly comprises two first connecting shafts respectively arranged at two sides of the first frame, and a first driving motor arranged on the C-shaped frame and used for driving one of the first connecting shafts to rotate.

[0015] Optionally, the second rotating frame comprises a second frame rotatingly arranged on the top surface of the fixing seat, and a placement plate arranged on the second frame and used for placing the workpiece to be sprayed, and a plurality of positioning holes used for positioning the workpiece to be sprayed are uniformly arranged on the placement plate.

[0016] Optionally, the mechanical arm spraying device further comprises a second driving assembly used for driving the second rotating frame to rotate left and right along the horizontal direction relative to the rotating support.

[0017] The second driving assembly comprises a second connecting shaft rotatably arranged between the second frame and the fixed base, and a second driving motor arranged in the fixed base and used for driving the second connecting shaft to rotate.

[0018] After the above technical scheme is applied, the present application has the following beneficial effects:

[0019] The first rotating frame and the second rotating frame arranged on the rotating support are used for placing different workpieces, so that the gravity distribution of the outer end of the rotating support is balanced, the stability of the rotating support is ensured, the first rotating frame and the second rotating frame can respectively fix workpieces of different shapes, the spraying manipulator can spray workpieces of different shapes, the spraying requirements of different workpieces are met, the flexibility of the production line is improved, the practicality is high, and the application range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a schematic diagram of the overall structure of the embodiment;

[0022] Figure 2 is a schematic diagram of the position relationship between the first rotating frame and the second rotating frame in the embodiment;

[0023] Figure 3 is a display diagram of the first rotating frame in the embodiment;

[0024] Figure 4 is Figure 3 is an enlarged view of part A in the figure;

[0025] Figure 5 is Figure 3 is an enlarged view of part B in the figure;

[0026] Figure 6 is a schematic diagram of the assembly relationship between the second rotating frame and the second driving assembly in the embodiment;

[0027] Figure 7 is a partial exploded view of the embodiment;

[0028] Figure 8 is Figure 7 is an enlarged view of part C in the figure.

[0029] Explanation of reference numerals: 10, base; 11, support column; 20, mechanical hand; 21, spraying head; 30, rotating support; 31, rotating plate; 311, opening part; 312, gear disc; 313, third driving motor; 314, pinion; 32, fixed seat; 33, C-shaped frame; 40, first rotating frame; 41, first frame; 42, bearing frame; 43, quick release structure; 431, positioning column; 432, sliding block; 433, first plug-in block; 434, second plug-in block; 435, sliding groove; 436, spring; 437, guide plate; 44, elastic clamping block; 441, U-shaped part; 442, elastic arm; 50, second rotating frame; 51, second frame; 52, placing plate; 521, positioning hole; 60, first driving assembly; 61, first connecting shaft; 62, first driving motor; 70, second driving assembly; 71, second connecting shaft; 72, second driving motor. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Figures 1-8 It should be noted that the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0032] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" appearing throughout the text means that three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0033] The present embodiment relates to a mechanical hand spraying device, which refers toFigures 1-8 , including a base 10, a mechanical arm 20 for spraying products, and a rotating support 30, wherein the base 10 is substantially cuboid (or other shapes), the base 10 is provided with supporting feet at the four corners, the mechanical arm 20 is a six-axis mechanical arm 20, the mechanical arm 20 is located in the middle of the rotating support 30, and a plurality of spraying heads 21 are provided on the mechanical arm 20. The two ends of the rotating support 30 are provided with a first rotating frame 40 and a second rotating frame 50 for placing different workpieces, the two first rotating frames 40 and the two second rotating frames 50 are centrally symmetrically arranged relative to the mechanical arm 20, the first rotating frame 40 is located above the second rotating frame 50, and the first rotating frame 40 can be flipped up and down relative to the rotating support 30 in the vertical direction, and the second rotating frame 50 can be rotated left and right relative to the rotating support 30 in the horizontal direction.

[0034] In this embodiment, only the first rotating frame 40 and the second rotating frame 50 are provided at the two ends of the rotating support 30, and in other embodiments, third rotating frames, fourth rotating frames, etc. can be synchronously added at the two ends of the rotating support 30, which can be adjusted according to actual conditions to realize fixing and spraying of more shapes of workpieces, which will not be described in detail here.

[0035] It can be understood that during spraying, two kinds of workpieces corresponding to the first rotating frame 40 and the second rotating frame 50 are respectively placed on the first rotating frame 40 and the second rotating frame 50, and the two kinds of workpieces are fixed by the first rotating frame 40 and the second rotating frame 50. At this time, the mechanical arm 20 is driven to work, so that the mechanical arm 20 sprays the workpieces placed on the first rotating frame 40 and the second rotating frame 50 respectively, thereby completing the spraying of workpieces of multiple shapes.

[0036] Further, referring to Figure 2 and Figure 3 , the first rotating frame 40 includes a first frame 41 rotatably arranged on the rotating support 30, a bearing frame 42 detachably connected to the first frame 41, and a quick-release structure 43 arranged between the first frame 41 and the bearing frame 42. The first frame 41 can be flipped up and down relative to the rotating support 30 in the vertical direction, the bearing frame 42 is detachably connected to the inner side of the first frame 41, and the bearing frame 42 is uniformly distributed with elastic clamping blocks 44 for placing workpieces to be sprayed, so as to realize the fixation of the workpieces to be sprayed.

[0037] Connecting the bearing frame 42 to the first frame 41 through the quick-release structure 43 can realize the quick disassembly of the bearing frame 42, thereby facilitating the replacement of the workpieces to be sprayed and improving the production efficiency.

[0038] Furthermore, there are two sets of quick-release structures 43, which are symmetrically arranged on both sides of the first frame 41 and the support frame 42, and the two sets of quick-release structures 43 cooperate to realize the quick assembly and disassembly of the first frame 41 and the support frame 42.

[0039] Specifically, refer to Figure 3 , Figure 4 and Figure 5 The quick-release structure 43 includes a positioning post 431 fixedly disposed at one end of the first frame 41, a sliding block 432 slidably disposed on the side wall of the positioning post 431, a first insertion block 433 disposed on the outside of the sliding block 432 and used to insert and cooperate with one end of the support frame 42, a second insertion block 434 disposed on the other end of the first frame 41 and inserted and cooperated with the other end of the support frame 42, and an elastic member disposed in the positioning post 431 for providing elastic force to the sliding block 432 so that both ends of the support frame 42 are stably cooperated with the first insertion block 433 and the second insertion block 434 respectively. The positioning post 431 is fixedly installed on the inner side of one end of the first frame 41. The positioning post 431 has a groove 435 along its length, located on the side wall of the positioning post 431. A sliding block 432 slides and engages with the groove 435, with one end of the sliding block 432 located inside the groove 435 and engaging with an elastic element, and the other end of the sliding block 432 located outside the groove 435. A first insertion block 433 is located on the side wall of the sliding block 432 outside the groove 435. The first insertion block 433 is a T-shaped insertion block and is inserted into one end of the support frame 42. A second insertion block 434 is opposite to the first insertion block 433 and is a cross-shaped insertion block, also inserted into the other end of the support frame 42.

[0040] Furthermore, the elastic element includes a spring 436 disposed in the positioning post 431. The positioning post 431 is provided with a receiving groove for accommodating the spring 436 and communicating with the slide groove 435. One end of the spring 436 abuts against the inner wall of the receiving groove, and the other end of the spring 436 abuts against the sliding block 432.

[0041] Understandably, when the support frame 42 needs to be installed on the first frame 41, the support frame 42 is first housed within the first frame 41. One end of the support frame 42 is then moved towards the first insertion block 433, causing the first insertion block 433 to insert into the support frame 42. Continuing to move the support frame 42 causes the sliding block 432 to move, compressing the spring 436 and aligning the other end of the support frame 42 with the second insertion block 434, which is then inserted into the support frame 42. At this point, the support frame 42 is released, and the spring 436 returns to its original position. Thus, under the elastic force of the spring 436, both ends of the support frame 42 are stably engaged with the first insertion block 433 and the second insertion block 434. Similarly, the above operation can also be used to remove the support frame 42 from the first frame 41, achieving quick assembly and disassembly of the support frame 42.

[0042] In addition, a guide plate 437 is provided on the inner side of the first frame 41. The guide plate 437 is located at one end of the first frame 41 near the second plug-in block 434. The second plug-in block 434 is located directly above the guide plate 437. The second plug-in block 434 and the guide plate 437 cooperate to form a gap for one end of the support frame 42 to pass through. When the first plug-in block 433 is fully inserted into one end of the support plate, the other end of the support plate is just on the guide plate 437. At this time, the support plate is released, and the support plate will automatically engage with the second plug-in block 434 under the action of the spring 436, thereby further improving the disassembly and assembly speed of the support plate.

[0043] Furthermore, the elastic block 44 includes a U-shaped portion 441 and two elastic arms 442 respectively disposed at both ends of the opening of the U-shaped portion 441. The side of the U-shaped portion 441 facing away from its own opening is fixedly connected to the bearing strip. The two elastic arms 442 are symmetrically arranged, and the distance between the two elastic arms 442 is greater than the size of the opening of the U-shaped portion 441.

[0044] It is understood that the elastic block 44 in this embodiment is machined according to the shape of the workpiece in order to fix the workpiece. The workpiece has a bottom opening. By extending the elastic arm 442 of the elastic block 44 into the bottom opening, the elastic force of the elastic arm 442 is used to fix the workpiece, thus achieving the fixation of the workpiece.

[0045] Furthermore, the distance between the two elastic arms 442 is gradually increased from the direction closer to the U-shaped part 441 to the direction farther away from the U-shaped part 441.

[0046] The above settings improve the fixation effect of the elastic locking block 44 on the workpiece, ensuring the stability of the workpiece and thus improving the spraying effect.

[0047] In addition, in other embodiments, the shape of the elastic arm 442 of the elastic block 44 can also be adjusted accordingly according to the actual situation, and no further limitations are made here.

[0048] Furthermore, combined Figure 1 The rotating support 30 includes a rotating plate 31 rotatably mounted on the base 10, two fixed seats 32 respectively disposed at both ends of the rotating plate 31, and a C-shaped frame 33 disposed outside the fixed seats 32. The middle part of the rotating plate 31 is rotatably connected to the base 10. The robot arm 20 is located in the middle of the rotating plate 31, and both ends of the rotating plate 31 extend outward relative to the robot arm 20 in the horizontal direction. The two fixed seats 32 are symmetrically disposed at both ends of the rotating plate 31, and the two second rotating frames 50 are rotatably connected to the two fixed seats 32 respectively. The opening of the C-shaped frame 33 faces upward and is inclined towards the direction of the robot arm 20. The two ends of the first rotating frame 40 are rotatably connected to the two inner walls of the C-shaped frame 33 respectively, and both the first rotating frame 40 and the second rotating frame 50 are located in the opening of the C-shaped frame 33.

[0049] In this embodiment, the opening of the C-frame 33 is tilted towards the robot arm 20, so that the first rotating frame 40 is located to the upper right of the second rotating frame 50, thereby enabling the robot arm 20 to perform full coating on the workpiece on the first rotating frame 40. In other embodiments, the opening of the C-frame 33 may also be tilted outward, that is, the direction of the opening of the C-frame 33 is opposite to that of this embodiment. In this case, the first rotating frame 40 is located to the upper left of the second rotating frame 50. The specific arrangement can be adjusted according to the actual situation, and no further limitation is made here.

[0050] Furthermore, referring to Figure 2 and Figure 6 The robotic arm spraying device provided in this embodiment also includes a first drive assembly 60 for driving the first rotating frame 40 to rotate vertically relative to the rotating support 30.

[0051] Specifically, the first drive assembly 60 includes two first connecting shafts 61 respectively disposed on both sides of the first frame 41 and a first drive motor 62 disposed on the C-shaped frame 33 for driving one of the connecting shafts to rotate. One end of each of the two first connecting shafts 61 is rotatably connected to the two inner walls of the C-shaped frame 33, and the other end of each of the two first connecting shafts 61 is fixedly connected to both sides of the first frame 41. The first drive motor 62 is fixedly installed on one side of the C-shaped frame 33, and the output shaft of the first drive motor 62 is fixedly connected to one of the connecting shafts.

[0052] In addition, to prevent the paint from contaminating the first drive motor 62 during the spraying of the robotic arm 20, a protective cover (not shown in the figure) is also provided on the C-frame 33 to accommodate the first drive motor 62.

[0053] The first drive motor 62 drives one of the connecting shafts to rotate, causing the first frame 41 to rotate vertically relative to the C-shaped frame 33, which in turn causes the first rotating frame 40 to rotate vertically relative to the C-shaped frame 33. This allows the robot arm 20 to perform comprehensive spraying on the workpiece to be sprayed on the support frame 42 of the first rotating frame 40, ensuring the quality of the spraying.

[0054] The second rotating frame 50 includes a second frame 51 rotatably mounted on the top surface of the fixed base 32 and a placement plate 52 mounted on the second frame 51 for placing the workpiece to be sprayed. The placement plate 52 has a plurality of positioning holes 521 evenly provided for positioning the workpiece to be sprayed.

[0055] The robotic arm spraying device provided in this embodiment also includes a second drive assembly 70 for driving the second rotating frame 50 to rotate left and right relative to the rotating support 30 in the horizontal direction.

[0056] Specifically, the second drive assembly 70 includes a second connecting shaft 71 rotatably disposed between the second frame 51 and the fixed base 32, and a second drive motor 72 disposed within the fixed base 32 for driving the second connecting shaft 71 to rotate. The second connecting shaft 71 is vertically arranged, one end of the second connecting shaft 71 is fixedly connected to the second frame 51, and the other end of the second connecting shaft 71 extends into the fixed base 32. The second drive motor 72 is fixedly installed within the fixed base 32, and the output shaft of the second drive motor 72 is fixedly connected to the second connecting shaft 71 (or the connection to the second connecting shaft 71 can be achieved through a reduction gearbox).

[0057] Understandably, the second drive motor 72 drives the second connecting shaft 71 to rotate, causing the second frame 51 to rotate left and right relative to the fixed seat 32 in the horizontal direction, that is, causing the second rotating frame 50 to rotate left and right relative to the rotating support 30 in the horizontal direction, so that the robot arm 20 can perform full spraying on the workpiece to be sprayed on the second rotating frame 50.

[0058] In addition, refer to Figure 7 and Figure 8 In this embodiment, a support column 11 is fixedly mounted on the base 10, and the robot arm 20 is fixedly mounted on the support column 11. An opening 311 and a gear disk 312 are provided in the middle of the rotating plate 31. The rotating plate 31 is sleeved around the support column 11 via the gear disk 312, and the support column 11 is fixedly mounted in the middle of the gear disk 312 via a bearing and rotatably connected to the gear disk 312. A third drive motor 313 for driving the gear disk 312 to rotate is provided inside the base 10. A small gear 314 that meshes with the gear disk 312 is fixedly mounted on the output shaft of the third drive motor 313, thereby driving the small gear 314 to rotate, which in turn drives the gear disk 312 to rotate, and consequently drives the rotating bracket 30 to rotate relative to the robot arm 20.

[0059] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A robot painting device comprising a base (10), a robot (20) and a rotating support (30), characterized in that, Both ends of the rotating support (30) are provided with a first rotating frame (40) and a second rotating frame (50) for placing different workpieces respectively, the first rotating frame (40) is located above the second rotating frame (50), the first rotating frame (40) can be flipped up and down along the vertical direction relative to the rotating support (30), and the second rotating frame (50) can be rotated left and right along the horizontal direction relative to the rotating support (30).

2. A robot painting device according to claim 1, characterized in that The first rotating frame (40) comprises a first frame (41) rotatably arranged on the rotating support (30), a bearing frame (42) detachably connected to the first frame (41), and a quick release structure (43) arranged between the first frame (41) and the bearing frame (42), and the bearing frame (42) is uniformly distributed with elastic clamping blocks (44) for placing workpieces to be sprayed.

3. A robot painting device according to claim 2, wherein The number of quick release structures (43) is two groups, and the two groups of quick release structures (43) are symmetrically arranged on both sides of the first frame (41) and the bearing frame (42). The quick release structure (43) comprises a positioning column (431) arranged at one end of the first frame (41), a sliding block (432) slidingly arranged on the side wall of the positioning column (431), a first plug-in block (433) arranged on the outer side of the sliding block (432) and used for plug-in cooperation with one end of the bearing frame (42), a second plug-in block (434) arranged at the other end of the first frame (41) and plug-in cooperation with the other end of the first frame (41), and an elastic member arranged in the positioning column (431) and used for providing elastic force to the sliding block (432) to enable the two ends of the bearing frame (42) to be stably matched with the first plug-in block (433) and the second plug-in block (434) respectively, and the positioning column (431) is provided with a sliding groove (435) along the length direction thereof, and the sliding block (432) is slidingly matched with the sliding groove (435).

4. A robot painting apparatus according to claim 3, wherein The elastic member comprises a spring (436) arranged in the positioning column (431), the positioning column (431) is provided with a containing groove for containing the spring (436) and communicating with the sliding groove (435), and one end of the spring (436) abuts against the inner wall of the containing groove, and the other end of the spring (436) abuts against the sliding block (432).

5. A robot painting apparatus according to claim 3, wherein The elastic clamping block (44) comprises a U-shaped portion (441) and two elastic arms (442) respectively arranged at both ends of the opening of the U-shaped portion (441), the U-shaped portion (441) is fixedly connected to the bearing frame (42) on the side away from the opening thereof, and the distance between the two elastic arms (442) is greater than the size of the opening of the U-shaped portion (441).

6. A robot painting apparatus according to claim 5, wherein The distance between the two elastic arms (442) gradually increases from the direction close to the U-shaped portion (441) to the direction away from the U-shaped portion (441).

7. The robot painting apparatus according to claim 1, wherein The rotating support (30) comprises a rotating plate (31) rotatably arranged on the base (10), two fixed seats (32) respectively arranged at two ends of the rotating plate (31), and a C-shaped frame (33) arranged outside the fixed seat (32), the middle part of the rotating plate (31) is rotatably connected to the base (10), and the two ends of the rotating plate (31) extend outward in the horizontal direction, the second rotating frame (50) is rotatably arranged on the fixed seat (32), the two ends of the first rotating frame (40) are rotatably connected to the two inner walls of the C-shaped frame (33), and the first rotating frame (40) and the second rotating frame (50) are located in the opening of the C-shaped frame (33).

8. A robot painting apparatus according to claim 7, wherein The mechanical arm spraying device further comprises a first driving assembly (60) for driving the first rotating frame (40) to flip up and down in the vertical direction relative to the rotating support (30); The first driving assembly (60) comprises two first connecting shafts (61) arranged on the two sides of the first frame (41) respectively, and a first driving motor (62) arranged on the C-shaped frame (33) and used for driving one of the first connecting shafts (61) to rotate.

9. A robot painting apparatus according to claim 7, wherein The second rotating frame (50) comprises a second frame (51) rotatably arranged on the top surface of the fixed seat (32), and a placing plate (52) arranged on the second frame (51) and used for placing the workpiece to be sprayed, and a plurality of positioning holes (521) for positioning the workpiece to be sprayed are uniformly arranged on the placing plate (52).

10. A robot painting apparatus according to claim 9, wherein The mechanical arm spraying device further comprises a second driving assembly (70) for driving the second rotating frame (50) to rotate left and right in the horizontal direction relative to the rotating support (30); The second driving assembly (70) comprises a second connecting shaft (71) rotatably arranged between the second frame (51) and the fixed seat (32), and a second driving motor (72) arranged in the fixed seat (32) and used for driving the second connecting shaft (71) to rotate.

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