A pipelined automatic spray gun assembly

Abstract

This application belongs to the field of metal surface spraying technology and discloses an automatic spray gun assembly for an assembly line. The application includes a spray gun body, characterized in that: an insertion hole is provided on the upper part of the spray gun body, and two straight holes are symmetrically provided on the bottom of the spray gun body. The top ends of the two straight holes are connected to the insertion hole. Through a set clamping component, an elastic push-pull mechanism can drive two push rods upward until the crossbar is clamped into the insertion hole, thus fixing the spray gun body to the crossbar. Subsequently, a limiting mechanism prevents the elastic push-pull mechanism from driving the push rods up and down. This ensures that the push rods firmly clamp the crossbar into the insertion hole, thus ensuring the reliability of the spray gun's fixation. Simultaneously, the push-pull action can drive the push rods up and down, making the operation of installing or removing the spray gun from the crossbar faster and easier, improving the practicality and convenience of the automatic spray gun assembly.

Description

Technical Field

[0001] This utility model relates to the field of metal surface spraying technology, and in particular to an automatic spray gun assembly for a production line. Background Technology

[0002] During the production process, metal parts need to be uniformly coated with a protective layer. These protective layers are generally classified according to their functions, such as corrosion and rust prevention, wear resistance, decoration, and insulation.

[0003] When spraying metal parts, the paint is atomized and sprayed out by a spray gun so that the paint adheres evenly to the surface of the metal parts. In order to improve the efficiency of the spraying process, multiple automatic spray guns with different spraying angles are fixed on the production line and then sprayed on the metal parts passing through the production line. Since the spraying angles of the multiple automatic spray guns are different, it can be ensured that the paint is sprayed onto the surface of the metal parts relatively evenly.

[0004] Regarding the aforementioned technologies, the inventors believe that the following drawbacks exist: To ensure that each automatic spray gun can stably spray paint at a predetermined spraying angle, the automatic spray gun is fixed in place using clamps and bolts. However, during assembly line spraying operations, multiple automatic nozzles are installed to ensure that the paint is evenly and thoroughly sprayed onto the metal surface. When installing or removing each automatic spray gun, a fixing rod needs to be inserted into the socket on the automatic spray gun, and then two screws are screwed in through the two threaded holes at the bottom of the socket until the top of the threaded holes is tightly pressed against the insert rod inside the socket. This completes the fixing operation of the automatic spray gun, requiring the tightening of two screws when installing or removing each automatic spray gun. This makes the installation, disassembly, and maintenance of the automatic spray gun time-consuming and laborious, reducing the convenience and practicality of the automatic spray gun assembly. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an automatic spray gun assembly for an assembly line.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an automatic spray gun assembly for a production line, comprising a spray gun body, characterized in that: an insertion hole is provided on the upper part of the spray gun body, two straight holes are symmetrically provided on the bottom of the spray gun body, the top ends of the two straight holes are connected to the insertion hole, two push rods are symmetrically and movably inserted into the two straight holes, a clamping assembly is connected to the spray gun body, and the two push rods are connected to the clamping assembly;

[0007] The clamping assembly is used to push the top ends of the two push rods to clamp the crossbar inserted into the socket. The clamping assembly includes an elastic push-pull mechanism connected to the bottom end of the push rod. The elastic push-pull mechanism can drive the two push rods to move up and down through a simple up-and-down push-pull action. The clamping assembly also includes a limiting mechanism connected to the spray gun body to prevent the elastic push-pull mechanism from driving the push rods to move up and down.

[0008] By adopting the above technical solution, the elastic push-pull mechanism can drive the two top rods upward until the crossbar is pressed tightly into the insertion hole to fix the spray gun body on the crossbar. Then, the limiting mechanism prevents the elastic push-pull mechanism from driving the top rods up and down. This ensures that the top rods firmly press the crossbar into the insertion hole, thus ensuring the reliability of the spray gun's fixation. At the same time, the push-pull action can drive the top rods up and down, making the operation of installing or removing the spray gun from the crossbar faster and easier, improving the practicality and convenience of the automatic spray gun assembly.

[0009] Furthermore, the elastic push-pull mechanism includes a first fixed plate fixedly connected between the bottom ends of the two top rods, two first elastic elements symmetrically fixedly connected between the top of the first fixed plate and the bottom of the spray gun body, a pull rod fixedly connected to the bottom of the first fixed plate, and a pull plate fixedly connected to the bottom end of the pull rod.

[0010] By adopting the above technical solution, simply pulling the pull plate can overcome the elastic force of the first elastic element and pull the two push rods downward until they are away from the crossbar. At the same time, simply releasing the pull plate allows the push rods to move upward under the elastic force of the first elastic element until they are pressed against the outer circumference of the crossbar. This makes the pressing or releasing operation of the push rods against the crossbar simpler and more convenient, further improving the convenience and practicality of the automatic spray gun assembly.

[0011] Furthermore, the limiting mechanism includes two vertical plates symmetrically fixedly connected to the bottom of the spray gun body, a second fixed plate fixedly connected between the bottoms of the two vertical plates, the second fixed plate being located directly below the first fixed plate, the bottom end of the pull rod passing through the second fixed plate and movably inserted into the second fixed plate, the pull plate being located directly below the second fixed plate, the limiting mechanism also includes an external threaded section formed on the outer circumference of the pull rod, an internal threaded tube threaded onto the external threaded section, the top end of the internal threaded tube passing through the second fixed plate and fixedly connected to a pressure ring, the bottom surface of the pressure ring being able to tightly abut against the top surface of the second fixed plate.

[0012] By adopting the above technical solution, the connection between the automatic spray gun assembly and the crossbar can be ensured, and the automatic spray gun assembly can be guaranteed not to move during operation so that the spraying work can be carried out smoothly.

[0013] Furthermore, the spray gun body is also provided with an auxiliary clamping component, which is used to make the top ends of the two push rods more tightly pressed against the outer wall of the crossbar inside the socket.

[0014] By adopting the above technical solution, the connection between the automatic spray gun assembly and the crossbar can be further improved.

[0015] Furthermore, the auxiliary clamping assembly includes two sets of first top blocks symmetrically fixedly connected to the bottom surface of the first fixed plate and the top surface of the second fixed plate. Each set of first top blocks consists of two pairs of first top blocks symmetrically distributed front and back. Two sets of first inclined surfaces are symmetrically formed on the bottom surface of the upper two pairs of first top blocks and the top surface of the lower two pairs of first top blocks. The auxiliary clamping assembly also includes two fixed blocks symmetrically fixedly connected to the bottom of the first fixed plate. Two pairs of round rods are symmetrically and movably inserted into the left and right sides of the two fixed blocks. Two pairs of second top blocks are symmetrically fixedly connected to the ends of the two pairs of round rods that are far apart from each other. Two pairs of second elastic elements are symmetrically fixedly connected between the adjacent sides and the left and right sides of the fixed block. Two pairs of second inclined surfaces are symmetrically opened on the top and bottom surfaces of the two pairs of second top blocks. The two pairs of second inclined surfaces are respectively attached to and tightly pressed against the upper and lower sets of first inclined surfaces. Two pairs of hinge rods are symmetrically hinged on the left and right sides of the two pairs of second top blocks. Two pairs of through cavities are symmetrically opened on the top of the second fixed plate. Two pairs of levers are symmetrically rotatably connected between the bottom surface of the two pairs of through cavities and the bottom surface of the second fixed plate. The top ends of the two pairs of levers are respectively hinged to the ends of the two pairs of hinge rods away from the second top blocks.

[0016] By adopting the above technical solution, the operation of reinforcing and tightening the crossbar becomes simple and convenient, effectively improving the convenience and practicality of the automatic spray gun assembly.

[0017] Furthermore, two connecting rods are symmetrically fixedly connected between the bottom ends of the two pairs of levers.

[0018] By adopting the above technical solution, it is only necessary to push the two connecting rods to move in the same direction to conveniently and stably drive the bottom ends of the two pairs of levers to move in the same direction.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. In this application, a clamping assembly is provided. The two push rods can be moved upward by the elastic push-pull mechanism until the crossbar is clamped in the insertion hole to fix the spray gun body on the crossbar. Then, the limiting mechanism prevents the elastic push-pull mechanism from moving the push rods up and down. This ensures that the push rods firmly clamp the crossbar in the insertion hole, thus ensuring the reliability of the spray gun's fixation. At the same time, the push-pull action can move the push rods up and down, making the operation of installing or removing the spray gun from the crossbar faster and easier, thus improving the practicality and convenience of the automatic spray gun assembly.

[0021] 2. In this application, an elastic push-pull mechanism is provided, which allows the pull plate to overcome the elastic force of the first elastic element and pull the two push rods downward until they are away from the crossbar. At the same time, the pull plate can be released and the push rods can move upward under the elastic force of the first elastic element until they are pressed against the outer circumference of the crossbar. This makes the pressing or releasing operation of the push rods against the crossbar simpler and more convenient, and further improves the convenience and practicality of the automatic spray gun assembly.

[0022] 3. In this application, an auxiliary clamping component is provided, so that after the push rod is clamped against the outer circumference of the crossbar under the elastic force of the first elastic element, the operator only needs to rotate the bottom ends of the two pairs of levers toward each other. In this way, the two pairs of levers drive the two pairs of second push blocks to move toward each other through the two pairs of hinged rods. Thus, under the action of the second inclined plane and the first inclined plane, the two pairs of first push blocks on the upper side of the two pairs of second push blocks are pushed upward properly, thereby causing the first fixed plate to move upward. This allows the top of the push rod to clamp more tightly against the outer circumference of the crossbar, making the operation of reinforcing the clamping of the crossbar simple and convenient, and effectively improving the convenience and practicality of the automatic spray gun assembly. Attached Figure Description

[0023] Figure 1 This is a first structural schematic diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a second structural schematic diagram of an embodiment of the present utility model;

[0025] Figure 3 This is a first partial structural schematic diagram of an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of a second partial structure of an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the third partial structure of an embodiment of the present utility model;

[0028] Figure 6 This is an embodiment of the present utility model. Figure 5 Enlarged diagram of point A in the middle.

[0029] In the diagram: 1. Spray gun body; 11. Insertion hole; 12. Straight hole; 13. Atomizing cap; 14. Paint inlet pipe; 15. Compressed gas inlet pipe; 2. Top rod; 3. Tightening assembly; 31. Elastic push-pull mechanism; 311. First fixed plate; 312. First elastic element; 313. Pull rod; 314. Pull plate; 32. Limiting mechanism; 321. Vertical plate; 322. Second fixed plate; 323. Internally threaded pipe; 4. Auxiliary tight-fitting assembly; 41. First top block; 42. Fixed block; 43. Round rod; 44. Second top block; 45. Hinge rod; 46. Bending rod; 47. Connecting rod. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] like Figure 1-6 As shown in the figure, this application discloses an automatic spray gun assembly for a production line, including a spray gun body 1. The spray gun body 1 is characterized by having an insertion hole 11 on its upper surface and two straight holes 12 symmetrically opened on its bottom surface. The top ends of the two straight holes 12 are connected to the insertion hole 11. Two push rods 2 are symmetrically and movably inserted into the two straight holes 12. A clamping assembly 3 is connected to the spray gun body 1, and the two push rods 2 are connected to the clamping assembly 3.

[0032] The clamping assembly 3 is used to push the top ends of the two push rods 2 to clamp the crossbar inserted into the insertion hole 11. The clamping assembly 3 includes an elastic push-pull mechanism 31 connected to the bottom end of the push rods 2. The elastic push-pull mechanism 31 can drive the two push rods 2 to move up and down through simple up and down push-pull actions. The clamping assembly 3 also includes a limiting mechanism 32 connected to the spray gun body 1 to prevent the elastic push-pull mechanism 31 from driving the push rods 2 to move up and down.

[0033] The spray gun body 1 also includes an atomizing cap 13 connected to the left end of the spray gun body 1, a paint inlet pipe 14 connected to the bottom of the spray gun body 1, and a compressed gas inlet pipe 15 connected to the right side of the spray gun body 1.

[0034] The crossbar is part of the position adjustment mechanism on the production line. The position adjustment mechanism is used to adjust the position and angle of the automatic spray gun assembly so that the paint sprayed by the atomizing cap 13 can spray the paint onto the designated position of the metal part. The position adjustment mechanism is prior art and will not be described in detail here.

[0035] Specifically, the elastic push-pull mechanism 31 can drive the two push rods 2 upward until the crossbar is pressed against the insertion hole 11 to fix the spray gun body 1 on the crossbar. Then, the limiting mechanism 32 prevents the elastic push-pull mechanism 31 from driving the push rods 2 to move up and down. This ensures that the push rods 2 firmly press the crossbar against the insertion hole 11, thus ensuring the reliability of the spray gun's fixation. At the same time, the push-pull action can drive the push rods 2 to move up and down, making the operation of installing or removing the spray gun from the crossbar faster and easier, thus improving the practicality and convenience of the automatic spray gun assembly.

[0036] refer to Figures 3-5 The elastic push-pull mechanism 31 includes a first fixed plate 311 fixedly connected between the bottom ends of the two top rods 2. Two first elastic elements 312 are symmetrically fixedly connected between the top of the first fixed plate 311 and the bottom of the spray gun body 1. A pull rod 313 is fixedly connected to the bottom of the first fixed plate 311, and a pull plate 314 is fixedly connected to the bottom end of the pull rod 313.

[0037] Specifically, simply pulling the pull plate 314 overcomes the elastic force of the first elastic element 312 and pulls the two push rods 2 downward until they are away from the crossbar. At the same time, simply releasing the pull plate 314 allows the push rods 2 to move upward under the elastic force of the first elastic element 312 until they are pressed against the outer circumference of the crossbar. This makes the pressing or releasing operation of the push rods 2 against the crossbar simpler and more convenient, further improving the convenience and practicality of the automatic spray gun assembly.

[0038] refer to Figures 3-5 The limiting mechanism 32 includes two vertical plates 321 symmetrically fixedly connected to the bottom of the spray gun body 1. A second fixing plate 322 is fixedly connected between the bottoms of the two vertical plates 321. The second fixing plate 322 is located directly below the first fixing plate 311. The bottom end of the pull rod 313 passes through the second fixing plate 322 and is movably inserted into the second fixing plate 322. The pull plate 314 is located directly below the second fixing plate 322. The limiting mechanism 32 also includes an external thread section formed on the outer circumferential surface of the pull rod 313. An internal thread tube 323 is threaded onto the external thread section. The top end of the internal thread tube 323 passes through the second fixing plate 322 and is fixedly connected to a pressure ring. The bottom surface of the pressure ring can be tightly pressed against the top surface of the second fixing plate 322.

[0039] Specifically, when the push rod 2 is pressed tightly against the outer circumference of the crossbar under the elastic force of the first elastic element 312, the internal threaded tube 323 can be rotated and, in conjunction with the external threaded section of the pull rod 313, the internal threaded tube 323 can be driven to move downward. The internal threaded tube 323 will drive the pressure ring to move downward until the bottom surface of the pressure ring is pressed tightly against the top surface of the second fixed plate 322. This prevents the pull rod 313 from moving downward further, thereby ensuring that the push rod 2 can be stably and reliably pressed against the outer circumference of the crossbar, thus ensuring the connection between the automatic spray gun assembly and the crossbar is firm, and ensuring that the automatic spray gun assembly will not move during operation so that the spraying work can be carried out smoothly.

[0040] refer to Figures 3-5 The spray gun body 1 is also provided with an auxiliary clamping component 4, which is used to make the top ends of the two push rods 2 press more tightly against the outer wall of the crossbar inside the socket 11.

[0041] Specifically, it can further improve the connection strength between the automatic spray gun assembly and the crossbar.

[0042] refer to Figures 3-6 The auxiliary clamping assembly 4 includes two sets of first top blocks 41 symmetrically fixedly connected to the bottom surface of the first fixed plate 311 and the top surface of the second fixed plate 322. Each set of first top blocks 41 consists of two pairs of first top blocks 41 symmetrically distributed front and back. Two sets of first inclined surfaces are symmetrically opened on the bottom surface of the upper two pairs of first top blocks 41 and the top surface of the lower two pairs of first top blocks 41. The auxiliary clamping assembly 4 also includes two fixed blocks 42 symmetrically fixedly connected to the bottom of the first fixed plate 311. Two pairs of round rods 43 are symmetrically and movably inserted into the left and right sides of the two fixed blocks 42. Two pairs of second top blocks 44 are symmetrically fixedly connected to the ends of the two pairs of round rods 43 that are far apart from each other. Two pairs of second elastic elements are symmetrically fixedly connected between the adjacent sides of the 4-phase block and the left and right sides of the fixed block 42. Two pairs of second inclined surfaces are symmetrically opened on the top and bottom surfaces of the two pairs of second top blocks 44. The two pairs of second inclined surfaces are respectively attached to the upper and lower sets of first inclined surfaces. Two pairs of hinge rods 45 are symmetrically hinged on the left and right sides of the two pairs of second top blocks 44. Two pairs of through cavities are symmetrically opened on the top of the second fixed plate 322. The bottom of the two pairs of through cavities is the bottom surface of the second fixed plate 322. Two pairs of lever rods 46 are symmetrically rotatably connected between the front and rear inner sidewalls of the two pairs of through cavities. The top ends of the two pairs of lever rods 46 are respectively hinged to the ends of the two pairs of hinge rods 45 away from the second top block 44.

[0043] Specifically, once the top rod 2 is pressed tightly against the outer circumference of the crossbar under the elastic force of the first elastic element 312, the operator only needs to rotate the bottom ends of the two pairs of levers 46 toward the same direction. In this way, the two pairs of levers 46 drive the two pairs of second top blocks 44 to move away from each other through the two pairs of hinge rods 45. Thus, under the action of the second inclined plane and the first inclined plane, the two pairs of first top blocks 41 on the upper side of the two pairs of second top blocks 44 are pushed upward, thereby causing the first fixing plate 311 to move upward. This allows the top of the top rod 2 to press more tightly against the outer circumference of the crossbar, making the operation of reinforcing the crossbar simple and convenient, and effectively improving the convenience and practicality of the automatic spray gun assembly.

[0044] refer to Figure 3 Two connecting rods 47 are symmetrically and fixedly connected between the bottom ends of the two pairs of levers 46.

[0045] Specifically, by simply pushing the two connecting rods 47 toward each other, the bottom ends of the two pairs of levers 46 can be moved toward each other in a convenient and stable manner. At the same time, when it is necessary to remove the automatic spray gun assembly from the crossbar, simply push the two connecting rods 47 toward each other. At this time, the two connecting rods 47 can push the two pairs of second top blocks 44 toward each other through the two pairs of levers 46 and the two pairs of hinge rods 45. This will cause the two pairs of first top blocks 41 on the upper side to move downward. Then, by rotating the internal threaded tube 323, the pressure ring will move upward away from the top surface of the second fixing plate 322. Then, the pull rod 313 will be pulled downward through the internal threaded tube 323 to drive the top rod 2 to continue to move downward through the first fixing plate 311. This will conveniently make the top of the top rod 2 move away from the crossbar, so that the crossbar can be pulled out from the insertion hole 11 to complete the disassembly operation of the automatic spray gun assembly.

[0046] Working principle: When the automatic spray gun assembly is fixed on the crossbar, pull down the pull plate 314 to pull the top of the top rod 2 out of the insertion hole 11, and then movably connect the spray gun body 1 to the crossbar through the insertion hole 11. Then adjust the angle of the spray gun body 1, and then release the pull plate 314. At this time, under the elastic force of the first elastic element 312, the top of the top rod 2 will press tightly against the outer circumference of the crossbar to complete the fixing operation of the automatic spray gun assembly and the crossbar.

[0047] Next, by simply rotating the bottom ends of the two pairs of levers 46 toward each other via the two connecting rods 47, the two pairs of levers 46 drive the two pairs of second top blocks 44 to move toward each other via the two pairs of hinged rods 45. Thus, under the action of the second inclined plane and the first inclined plane, the two pairs of first top blocks 41 on the upper side of the two pairs of second top blocks 44 are pushed upward, thereby causing the first fixed plate 311 to move upward. This allows the top of the top rod 2 to press more tightly against the outer circumference of the crossbar, making the operation of reinforcing and pressing the crossbar simple and convenient, and effectively improving the convenience and practicality of the automatic spray gun assembly.

[0048] Then, rotate the internal threaded tube 323 and cooperate with the external threaded section of the pull rod 313 to drive the internal threaded tube 323 to move downward. The internal threaded tube 323 will drive the pressure ring to move downward until the bottom surface of the pressure ring is tightly pressed against the top surface of the second fixed plate 322. This prevents the pull rod 313 from moving downward, thereby ensuring that the top rod 2 can be stably and reliably pressed against the outer circumference of the crossbar. This ensures the connection between the automatic spray gun assembly and the crossbar is firm, and ensures that the automatic spray gun assembly will not move during operation so that the spraying work can be carried out smoothly.

[0049] When it is necessary to remove the automatic spray gun assembly from the crossbar, simply push the two connecting rods 47 in opposite directions. At this time, the two connecting rods 47 can push the two pairs of second top blocks 44 in opposite directions through the two pairs of levers 46 and the two pairs of hinge rods 45. This will cause the two pairs of first top blocks 41 on the upper side to move downward. Then, rotate the internal threaded tube 323 to drive the pressure ring to move upward away from the top surface of the second fixing plate 322. Then, pull the pull rod 313 downward through the internal threaded tube 323 so that the top rod 2 can continue to move downward through the first fixing plate 311. This will make it easy to move the top of the top rod 2 away from the crossbar, so that the crossbar can be pulled out from the insertion hole 11 to complete the disassembly operation of the automatic spray gun assembly.

[0050] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A flowline automatic gun assembly comprising a gun body (1) characterised in that: The spray gun body (1) has an insertion hole (11) on its upper part. The bottom of the spray gun body (1) has two straight holes (12) symmetrically opened. The top of the two straight holes (12) is connected to the insertion hole (11). Two push rods (2) are symmetrically and movably inserted into the two straight holes (12). A clamping assembly (3) is connected to the spray gun body (1). The two push rods (2) are connected to the clamping assembly (3). The clamping assembly (3) is used to push the top ends of the two push rods (2) to clamp the crossbar inserted into the insertion hole (11). The clamping assembly (3) includes an elastic push-pull mechanism (31) connected to the bottom end of the push rod (2). The elastic push-pull mechanism (31) can drive the two push rods (2) to move up and down through simple up and down push-pull actions. The clamping assembly (3) also includes a limiting mechanism (32) connected to the spray gun body (1) to prevent the elastic push-pull mechanism (31) from driving the push rods (2) to move up and down.

2. A flowline automatic gun assembly as defined in claim 1 wherein: The elastic push-pull mechanism (31) includes a first fixed plate (311) fixedly connected between the bottom ends of the two top rods (2). Two first elastic elements (312) are symmetrically fixedly connected between the top of the first fixed plate (311) and the bottom of the spray gun body (1). A pull rod (313) is fixedly connected to the bottom of the first fixed plate (311), and a pull plate (314) is fixedly connected to the bottom end of the pull rod (313).

3. A flowline automatic gun assembly as defined in claim 2 wherein: The limiting mechanism (32) includes two vertical plates (321) symmetrically fixedly connected to the bottom of the spray gun body (1). A second fixing plate (322) is fixedly connected between the bottoms of the two vertical plates (321). The second fixing plate (322) is located directly below the first fixing plate (311). The bottom end of the pull rod (313) passes through the second fixing plate (322) and is movably inserted into the second fixing plate (322). The pull plate (314) is located directly below the second fixing plate (322). The limiting mechanism (32) also includes an external thread section opened on the outer circumferential surface of the pull rod (313). An internal thread tube (323) is threaded onto the external thread section. The top end of the internal thread tube (323) passes through the second fixing plate (322) and is fixedly connected to a pressure ring. The bottom surface of the pressure ring can be tightly pressed against the top surface of the second fixing plate (322).

4. A flowline automatic gun assembly as defined in claim 3 wherein: The spray gun body (1) is also provided with an auxiliary clamping assembly (4), which is used to make the top ends of the two push rods (2) press more tightly against the outer wall of the crossbar inside the socket (11).

5. A flowline automatic gun assembly as defined in claim 4 wherein: The auxiliary clamping assembly (4) includes two sets of first top blocks (41) symmetrically fixedly connected to the bottom surface of the first fixed plate (311) and the top surface of the second fixed plate (322). Each set of first top blocks (41) consists of two pairs of first top blocks (41) symmetrically distributed front and back. Two sets of first inclined surfaces are symmetrically opened on the bottom surface of the upper two pairs of first top blocks (41) and the top surface of the lower two pairs of first top blocks (41). The auxiliary clamping assembly (4) also includes two fixed blocks (42) symmetrically fixedly connected to the bottom of the first fixed plate (311). Two pairs of round rods (43) are symmetrically and movably inserted into the left and right sides of the two fixed blocks (42). Two pairs of second top blocks (44) are symmetrically fixedly connected to the ends of the two pairs of round rods (43) that are far apart from each other. Two pairs of second elastic elements are symmetrically fixedly connected between the side of the second top block (44) close to the left and right sides of the fixing block (42). Two pairs of second inclined surfaces are symmetrically opened on the top and bottom surfaces of the two pairs of second top blocks (44). The two pairs of second inclined surfaces are respectively attached to the upper and lower sets of first inclined surfaces. Two pairs of hinge rods (45) are symmetrically hinged on the left and right sides of the two pairs of second top blocks (44). Two pairs of through cavities are symmetrically opened on the top of the second fixing plate (322). Two pairs of levers (46) are symmetrically rotatably connected between the bottom surface of the second fixing plate (322) at the bottom of the two pairs of through cavities and the front and rear inner sidewalls of the two pairs of through cavities. The top ends of the two pairs of levers (46) are respectively hinged to the ends of the two pairs of hinge rods (45) away from the second top block (44).

6. The automatic spray gun assembly for a production line according to claim 5, characterized in that: Two connecting rods (47) are symmetrically fixedly connected between the bottom ends of the two pairs of levers (46).

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