A paint spraying apparatus for axle machining

Abstract

The application belongs to the technical field of axle machining and paint spraying, and particularly relates to a paint spraying device for axle machining, which comprises a spraying rack, positioning openings, a rotary spraying mechanism and a filtering mechanism. Multiple sets of the positioning openings are symmetrically arranged on the two sides of the spraying rack. The rotary spraying mechanism comprises a conveying assembly, a guide assembly, a positioning assembly and a driving assembly. The conveying assembly is arranged on the inner side wall of the spraying rack. The guide assembly is arranged on the side wall of the spraying rack. The positioning assembly is arranged on the side of the spraying rack away from the guide assembly. The driving assembly is arranged on the side of the spraying rack close to the guide assembly. The paint spraying device for axle machining can realize axial support centering of the inside of the axle, cooperates with the conical surface extrusion friction to drive the stable rotation of the workpiece, eliminates the problems of spraying slip and long axial radial runout, and simultaneously matches the paint mist recovery filtering system to centrally collect the excess paint, reduces VOC emission, and is suitable for assembly line batch spraying operation.

Description

Technical Field

[0001] This invention belongs to the field of axle processing and painting technology, specifically referring to a painting device for axle processing. Background Technology

[0002] Axles are exposed to air for extended periods, making their sides highly susceptible to corrosion during use, which directly reduces their overall mechanical properties. To improve the rust resistance of the axle's outer wall, the outer surface must be treated with anti-rust paint during the axle manufacturing process.

[0003] The existing painting equipment for axle machining has the following problems: Conventional rotary spraying equipment only clamps the workpiece from both ends of the axle. During the spraying process, paint mist adheres to the clamping contact surface, and the workpiece is prone to slippage when rotating, resulting in intermittent rotation and poor uniformity of the sprayed film thickness. When painting long axles, the weight of the workpiece held at both ends can easily cause significant radial runout, resulting in large differences in the thickness of the paint film on the outer wall of the axle and inconsistent rust prevention effects. When multiple axles are sprayed simultaneously, the equipment cannot collect and filter the excess paint mist and dripping paint generated during spraying. The paint directly diffuses into the workshop environment, which does not meet environmental protection standards and is difficult to meet the needs of current automated axle processing production lines. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this solution provides a painting equipment for axle processing. This equipment enables axial support and centering within the axle, and, in conjunction with conical surface extrusion friction, drives the workpiece to rotate smoothly, eliminating problems such as spraying slippage and radial runout of long shafts. Simultaneously, it is equipped with a paint mist recovery and filtration system to collect excess paint, reduce VOC emissions, and is suitable for batch spraying operations on assembly lines.

[0005] The technical solution adopted in this solution is as follows: This solution proposes a painting equipment for axle processing, including a painting frame, positioning ports, a rotary spraying mechanism, and a filtering mechanism. Multiple sets of the positioning ports are symmetrically arranged on both sides of the painting frame. The rotary spraying mechanism includes a conveying component, a guiding component, a positioning component, and a driving component. The conveying component is located on the inner side wall of the painting frame, the guiding component is located on the side wall of the painting frame, the positioning component is located on the side of the painting frame away from the guiding component, and the driving component is located on the side of the painting frame close to the guiding component. The filtering mechanism includes an adsorption component, a negative pressure component, a filtering component, and an anti-slip component. The adsorption component is located at the bottom of the painting frame, the negative pressure component is located on the side of the painting frame close to the guiding component, the filtering component is located on the adsorption component, and the anti-slip component is located on the side wall of the guiding component.

[0006] As a further preferred embodiment of the present invention, the conveying assembly includes a conveying trough and a conveyor belt. The conveying trough is located on the inner sidewalls at both ends of the spraying frame, and the conveyor belt is slidably disposed on the bottom wall of the conveying trough. The guiding assembly includes guide sleeves, guide tube shafts, and sealing rings. Multiple sets of guide sleeves are rotatably disposed on the sidewalls of the spraying frame outside the positioning port. The guide tube shaft is slidably disposed inside the guide sleeves via splines and keyways, and the guide tube shaft is a tapered rod. The sealing ring is disposed at one end of the guide tube shaft near the spraying frame. The positioning assembly includes a positioning spring, a magnetic plate, a rubber plug, and a ring-shaped electromagnet. Multiple sets of... The positioning spring is located on the side of the spraying frame away from the guide sleeve, the magnetic suction plate is located on the side of the positioning spring away from the spraying frame, the rubber plug is located on the side of the magnetic suction plate near the positioning port, and the annular electromagnet is located on the side wall of the spraying frame outside the positioning spring, with the annular electromagnet and the magnetic suction plate facing each other. The driving assembly includes a drive motor, a drive gear, a driven gear, and a gear belt. The drive motor is located on the side wall of the spraying frame, the drive gear is located at the output end of the drive motor, the driven gear is located outside the guide sleeve, and the gear belt is wound between the drive gear and the driven gear.

[0007] Preferably, the adsorption assembly includes a negative pressure generator, a negative pressure chamber, and negative pressure electrically controlled valves. The negative pressure chamber is located at the bottom of the spraying machine frame, and the negative pressure generator is located at the bottom of the negative pressure chamber. The output end of the negative pressure generator extends through the inside of the negative pressure chamber. Multiple sets of negative pressure electrically controlled valves are connected to the bottom wall of the negative pressure chamber located on one side of the negative pressure generator. The negative pressure assembly includes a sliding frame, a rotary joint, an air outlet valve, and a return spring. Multiple sets of sliding frames are slidably disposed on the bottom wall of the spraying machine frame below the guide sleeve. The end of the guide tube shaft away from the spraying machine frame is rotatably disposed on the side wall of the sliding frame. The rotary joint is located at the end of the sliding frame away from the spraying machine frame, and the rotary joint is connected to the guide tube shaft. The air outlet valve is connected to the end of the rotary joint away from the guide tube shaft, and the reset spring is located between the sliding frame and the spraying machine frame; the filter assembly includes a filter layer and a one-way air inlet valve, the filter layer is located on the inner wall of the top of the negative pressure box, and multiple sets of the one-way air inlet valves are connected to the upper wall of the negative pressure box; the anti-slip assembly includes an anti-slip rod, a wear-resistant rubber ring, an anti-slip spring, and a rigid tube, multiple sets of the anti-slip rods are slidably located on the inner wall of the guide sleeve, the wear-resistant rubber ring is located on the side wall of the anti-slip rod outside the guide tube shaft, the anti-slip spring is located between the inner wall of the guide sleeve outside the guide tube shaft and the wear-resistant rubber ring, and multiple sets of the rigid tubes are penetrating through the inner wall of the wear-resistant rubber ring.

[0008] Specifically, a controller is provided on the side wall of the spraying machine frame.

[0009] The controller is electrically connected to the ring electromagnet, the drive motor, the negative pressure generator, and the negative pressure solenoid valve.

[0010] In the initial state, the return spring is in the extended state, the sliding frame is at its maximum limit position far from the spraying machine frame, and the negative pressure solenoid valve is in the open state. The external spraying assembly is then installed and fixed on the top of the spraying machine frame, with each spray nozzle corresponding to a positioning port station. The hollow axles to be painted are fed into the positioning groove of the conveyor belt through the workpiece loading port at one end of the painting machine frame; the conveyor belt is driven by an external conveying drive mechanism to move step by step. After continuous feeding, the axles of multiple hollow axles are aligned with the guide tube shaft and the rubber plug, respectively. The controller controls the ring electromagnet to generate magnetic force. The ring electromagnet and the magnetic suction plate are opposite poles facing each other. The magnetic suction plate moves towards the spraying frame against the elastic force of the positioning spring, which drives the rubber plug to be inserted into the shaft hole at one end of the hollow axle. The outer diameter of the rubber plug and the sealing ring is slightly larger than the inner diameter of the hollow axle. The other end face of the hollow axle presses the sealing ring tightly. The axle is clamped and sealed between the rubber plug and the sealing ring, forming a sealed inner cavity at both ends.

[0011] The beneficial effects achieved by this solution using the above structure are as follows: Compared with existing technologies, this solution uses negative pressure differential to drive the tapered guide tube shaft to extend into the hollow axle for axial support, reducing the deflection of the long axle itself, suppressing radial runout, and ensuring uniform coating thickness and stable rust prevention performance on the outer circumference of the axle. The wear-resistant rubber ring is squeezed by a tapered tube shaft to drive the friction between the wear-resistant rubber ring and the inner wall of the axle, avoiding the problem of slippage due to paint mist when clamping the end face, and ensuring continuous and stable rotation of the workpiece; the wear-resistant rubber ring is equipped with pressure relief fine holes to meet the dual requirements of negative pressure feeding and extrusion centering. Equipped with a negative pressure paint mist recovery system, the settled paint mist generated during spraying is collected and filtered in a unified manner, reducing paint waste and VOC pollution in the workshop, and meeting the requirements of environmentally friendly production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this solution; Figure 2 This is the front perspective stereoscopic view of this solution; Figure 3 This is a bottom-view perspective of the design. Figure 4 This is a schematic diagram of the anti-slip components in this solution; Figure 5 This is a schematic diagram of the spraying frame structure for this solution; Figure 6 This is the main view of this solution; Figure 7 This is a side view of the design. Figure 8 This is a top view of the plan; Figure 9 for Figure 8 Sectional view of AA section; Figure 10 for Figure 2 Enlarged structural view of section I; Figure 11 for Figure 2 Enlarged structural view of Part II; Figure 12 for Figure 1 Enlarged structural view of Part III; Figure 13 for Figure 9 Enlarged structural view of sections I and V.

[0013] The components include: 1. Spraying frame; 2. Positioning port; 3. Spraying mechanism; 4. Conveying assembly; 5. Conveying trough; 6. Conveying belt; 7. Guiding assembly; 8. Guide sleeve; 9. Guide tube shaft; 10. Sealing ring; 11. Positioning assembly; 12. Positioning spring; 13. Magnetic plate; 14. Rubber plug; 15. Ring electromagnet; 16. Drive assembly; 17. Drive motor; 18. Drive gear; 19. Driven gear; 20. Gear skin. 21. Filter mechanism, 22. Adsorption component, 23. Negative pressure generator, 24. Negative pressure box, 25. Negative pressure solenoid valve, 26. Negative pressure component, 27. Sliding frame, 28. Rotary joint, 29. Air outlet valve, 30. Filter component, 31. Filter layer, 32. One-way air inlet valve, 33. Controller, 34. Return spring, 35. Anti-slip component, 36. Anti-slip rod, 37. Wear-resistant rubber ring, 38. Anti-slip spring, 39. Rigid tube.

[0014] The accompanying drawings are provided to further understand the present solution and form part of the specification. They are used together with the embodiments of the present solution to explain the present solution and do not constitute a limitation thereof. Detailed Implementation

[0015] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this solution, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this solution without creative effort are within the scope of protection of this solution.

[0016] In the description of this solution, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this solution.

[0017] like Figures 1-13As shown, the present solution proposes a painting equipment for axle processing, including a painting frame 1, a positioning port 2, a rotary spraying mechanism 3, and a filtering mechanism 21. Multiple sets of the positioning ports 2 are symmetrically arranged on both sides of the painting frame 1. The rotary spraying mechanism 3 includes a conveying component 4, a guiding component 7, a positioning component 11, and a driving component 16. The conveying component 4 is located on the inner side wall of the painting frame 1, the guiding component 7 is located on the side wall of the painting frame 1, the positioning component 11 is located on the side of the painting frame 1 away from the guiding component 7, and the driving component 16 is located on the side of the painting frame 1 close to the guiding component 7. The filtering mechanism 21 includes an adsorption component 22, a negative pressure component 26, a filtering component 30, and an anti-slip component 35. The adsorption component 22 is located at the bottom of the painting frame 1, the negative pressure component 26 is located on the side of the painting frame 1 close to the guiding component 7, the filtering component 30 is located on the adsorption component 22, and the anti-slip component 35 is located on the side wall of the guiding component 7.

[0018] The conveying assembly 4 includes a conveying trough 5 and a conveyor belt 6. The conveying trough 5 is located on the inner sidewalls of both ends of the spraying frame 1, and the conveyor belt 6 is slidably located on the bottom wall of the conveying trough 5. The guiding assembly 7 includes a guide sleeve 8, a guide tube shaft 9, and a sealing ring 10. Multiple sets of the guide sleeves 8 are rotatably located on the sidewalls of the spraying frame 1 outside the positioning port 2. The guide tube shaft 9 is slidably located inside the guide sleeve 8 through splines and keyways, and the guide tube shaft 9 is a tapered rod. The sealing ring 10 is located at one end of the guide tube shaft 9 near the spraying frame 1. The positioning component 11 includes a positioning spring 12, a magnetic suction plate 13, a rubber plug 14, and an annular electromagnet 15. Multiple sets of the positioning springs 12 are located on the side of the spraying frame 1 away from the guide sleeve 8. The magnetic suction plate 13 is located on the side of the positioning springs 12 away from the spraying frame 1. The rubber plug 14 is located on the side of the magnetic suction plate 13 close to the positioning port 2. The annular electromagnet 15 is located on the side wall of the spraying frame 1 outside the positioning springs 12, and the annular electromagnet 15 is arranged opposite to the magnetic suction plate 13. The drive assembly 16 includes a drive motor 17, a drive gear 18, a driven gear 19, and a gear belt 20. The drive motor 17 is located on the side wall of the spraying frame 1, the drive gear 18 is located at the output end of the drive motor 17, the driven gear 19 is located on the outside of the guide sleeve 8, and the gear belt 20 is wound between the drive gear 18 and the driven gear 19.

[0019] The adsorption assembly 22 includes a negative pressure generator 23, a negative pressure box 24, and a negative pressure solenoid valve 25. The negative pressure box 24 is located at the bottom of the spraying frame 1, the negative pressure generator 23 is located at the bottom of the negative pressure box 24, the output end of the negative pressure generator 23 is located inside the negative pressure box 24, and multiple sets of negative pressure solenoid valves 25 are connected to the bottom wall of the negative pressure box 24 located on one side of the negative pressure generator 23. The negative pressure assembly 26 includes a sliding frame 27, a rotary joint 28, an air outlet valve 29, and a return spring 34. Multiple sets of the sliding frames 27 are slidably disposed on the bottom wall of the spraying machine frame 1 below the guide sleeve 8. The end of the guide tube shaft 9 away from the spraying machine frame 1 is rotatably disposed on the side wall of the sliding frame 27. The rotary joint 28 is disposed at the end of the sliding frame 27 away from the spraying machine frame 1 and is connected to the guide tube shaft 9. The air outlet valve 29 is connected to the end of the rotary joint 28 away from the guide tube shaft 9. The return spring 34 is disposed between the sliding frame 27 and the spraying machine frame 1. The filter assembly 30 includes a filter layer 31 and a one-way air inlet valve 32. The filter layer 31 is disposed on the inner wall of the top of the negative pressure box 24, and multiple sets of one-way air inlet valves 32 are connected and disposed on the upper wall of the negative pressure box 24. The anti-slip assembly 35 includes an anti-slip rod 36, a wear-resistant rubber ring 37, an anti-slip spring 38, and a rigid tube 39. Multiple sets of anti-slip rods 36 are slidably disposed on the inner wall of the guide sleeve 8. The wear-resistant rubber ring 37 is disposed on the side wall of the anti-slip rod 36 outside the guide tube shaft 9. The anti-slip spring 38 is disposed between the inner wall of the guide sleeve 8 outside the guide tube shaft 9 and the wear-resistant rubber ring 37. Multiple sets of rigid tubes 39 are disposed through the inner wall of the wear-resistant rubber ring 37. The side wall of the spraying frame 1 is equipped with a controller 33.

[0020] The controller 33 is electrically connected to the annular electromagnet 15, the drive motor 17, the negative pressure generator 23, and the negative pressure solenoid valve 25, respectively.

[0021] In actual use, the return spring 34 remains in the extended state, the sliding frame 27 stays at the maximum sliding limit position away from the spraying machine frame 1, and the negative pressure solenoid valve 25 is in the normally open state; the external spraying assembly is fixedly installed on the top of the spraying machine frame 1, and the spraying nozzle corresponds one-to-one with the positioning port 2 station. The hollow axle to be sprayed is fed into the positioning groove of the conveyor belt 6 through the workpiece loading port at one end of the spraying frame 1; the conveyor belt 6 is driven by an external conveying drive mechanism to move step by step. After continuous feeding, the axle centers of multiple hollow axles are coaxially aligned with the guide tube shaft 9 and the rubber plug 14 respectively. The controller 33 controls the annular electromagnet 15 to generate a magnetic field. The annular electromagnet 15 and the magnetic suction plate 13 are arranged with opposite poles. The magnetic suction plate 13 moves towards the spray frame 1 against the elastic force of the positioning spring 12, which drives the rubber plug 14 to be inserted into the shaft hole at one end of the hollow axle. The outer diameter of the rubber plug 14 and the sealing ring 10 is slightly larger than the inner diameter of the hollow axle. The end face of the other end of the hollow axle presses the sealing ring 10 tightly, and both ends of the axle are completely sealed, forming a closed cavity inside. The controller 33 starts the negative pressure generator 23, which extracts the air from the inside of the negative pressure box 24. The negative pressure control valve 25 and the air outlet valve 29 are connected by a pipeline. The negative pressure box 24 extracts the air from the inside of the guide sleeve 8 and the guide tube shaft 9 in sequence through the negative pressure control valve 25 and the air outlet valve 29, thereby quickly extracting the air from the sealed inner cavity of the hollow axle and forming a negative pressure in the inner cavity. Driven by the pressure difference between the inside and outside, the guide tube shaft 9 overcomes the elastic force of the return spring 34 and slides inward along the guide sleeve 8, which drives the sealing ring 10 to extend into the middle section of the hollow axle. At the same time, it pulls the sliding frame 27 to move inward along the bottom wall of the spraying frame 1. The guide tube shaft 9 extends into the axle to form axial support, which greatly reduces the deflection of the long axle itself, significantly suppresses the radial runout during the rotation process, and ensures that the coating thickness on the outer wall of the axle is uniform. The outer diameter of the guide tube shaft 9 gradually increases as it passes through the wear-resistant rubber ring 37. The guide tube shaft 9 uses the elastic deformation of the anti-slip spring 38 to drive the wear-resistant rubber ring 37. The wear-resistant rubber ring 37 slides into the hollow axle through the anti-slip rod 36 along the guide sleeve 8. Under the compression of the guide tube shaft 9, the wear-resistant rubber ring 37 is tightly attached to the inner wall of the hollow axle. As the length of the guide tube shaft 9 extending into the hollow axle increases, under the sliding suction of the sealing rubber ring 10, outside air enters the end of the hollow axle away from the negative pressure through the rigid tube 39, ensuring the length of the guide tube shaft 9 extending into the hollow axle. After the guide tube shaft 9 is fed into place, the controller 33 closes the negative pressure electric control valve 25, cutting off the air passage between the guide tube shaft 9 and the negative pressure box 24. The controller 33 starts the drive motor 17, and the output shaft of the drive motor 17 drives the drive gear 18 to rotate. The drive gear 18 drives the driven gear 19 and the guide sleeve 8 to rotate synchronously through the gear belt 20. The guide sleeve 8 drives the guide tube shaft 9 to rotate synchronously by relying on the internal spline. The guide tube shaft 9 drives the hollow axle to rotate at a constant speed by relying on the interference friction between the wear-resistant rubber ring 37 and the inner wall of the axle. The external spraying assembly performs a full-coverage spraying operation on the outer circumference of the axle that rotates at a constant speed. During the spraying process, the downward-sinking paint mist is continuously drawn into the negative pressure box 24 by the negative pressure suction and enters the negative pressure box 24 through the one-way air inlet valve 32. The paint mist particles are intercepted and filtered by the filter layer 31, which greatly reduces the diffusion of paint into the workshop environment and reduces raw material loss and VOC pollution. After a single batch of axles is painted, the controller 33 opens the negative pressure electric control valve 25, and outside air flows into the hollow axle cavity through the negative pressure box 24 and the guide tube shaft 9, restoring the air pressure inside and outside the cavity to balance. The return spring 34 rebounds and pushes the sliding frame 27 to slide outward, driving the guide tube shaft 9 and the sealing ring 10 to be pulled out from inside the axle. The conveyor belt 6 moves in steps, and the painted axle is transferred to the rear end paint finishing station. New axles that have not been painted are simultaneously sent to the painting station. The above operation can be repeated for the next use.

[0022] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] The present solution and its implementation methods have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present solution; the actual structure is not limited to this. In conclusion, if a person skilled in the art, inspired by this description, designs a similar structure and embodiment without departing from the inventive intent of this solution, such design should fall within the protection scope of this solution.

Claims

1. A painting device for axle processing, comprising a painting frame and a positioning port, characterized in that: It also includes a rotary spraying mechanism and a filtering mechanism. Multiple positioning ports are symmetrically arranged on both sides of the spraying frame. The rotary spraying mechanism includes a conveying component, a guiding component, a positioning component, and a driving component. The conveying component is located on the inner side wall of the spraying frame, the guiding component is located on the side wall of the spraying frame, the positioning component is located on the side of the spraying frame away from the guiding component, and the driving component is located on the side of the spraying frame close to the guiding component. The filtering mechanism includes an adsorption component, a negative pressure component, a filtering component, and an anti-slip component. The adsorption component is located at the bottom of the spraying frame, the negative pressure component is located on the side of the spraying frame close to the guiding component, the filtering component is located on the adsorption component, and the anti-slip component is located on the side wall of the guiding component. The guide assembly includes a guide sleeve and a guide tube shaft; The negative pressure assembly includes a sliding frame, a rotary joint, an air outlet valve, and a return spring; Multiple sliding frames are slidably mounted on the bottom wall of the spraying machine frame below the guide sleeve. The end of the guide tube shaft away from the spraying machine frame is rotatably mounted on the side wall of the sliding frame. The rotary joint is located at the end of the sliding frame away from the spraying machine frame. The air outlet valve is connected to the end of the rotary joint away from the guide tube shaft. The return spring is located between the sliding frame and the spraying machine frame. The anti-slip components include anti-slip rods, wear-resistant rubber rings, anti-slip springs, and rigid tubes; Multiple anti-slip rods are slidably mounted on the inner wall of the guide sleeve, wear-resistant rubber rings are mounted on the side wall of the anti-slip rods on the outer side of the guide tube shaft, anti-slip springs are mounted between the inner wall of the guide sleeve on the outer side of the guide tube shaft and the wear-resistant rubber rings, and multiple sets of rigid tubes are inserted through the inner wall of the wear-resistant rubber rings.

2. The painting equipment for axle processing according to claim 1, characterized in that: The conveying assembly includes a conveying trough and a conveyor belt. The conveying trough is located on the inner sidewalls at both ends of the spraying machine frame, and the conveyor belt is slidably disposed on the bottom wall of the conveying trough.

3. The painting equipment for axle processing according to claim 1, characterized in that: The guide assembly also includes a sealing ring, multiple sets of guide sleeves are rotatably disposed on the side wall of the spraying frame outside the positioning port, the guide tube shaft is slidably disposed inside the guide sleeve through splines and keyways, and the guide tube shaft is a tapered rod, and the sealing ring is disposed at one end of the guide tube shaft near the spraying frame.

4. The painting equipment for axle processing according to claim 1, characterized in that: The adsorption assembly includes a negative pressure generator, a negative pressure chamber, and negative pressure electrically controlled valves. The negative pressure chamber is located at the bottom of the spraying machine frame, the negative pressure generator is located at the bottom of the negative pressure chamber, the output end of the negative pressure generator is located inside the negative pressure chamber, and multiple sets of negative pressure electrically controlled valves are connected to the bottom wall of the negative pressure chamber located on one side of the negative pressure generator.

5. The painting equipment for axle processing according to claim 1, characterized in that: The drive assembly includes a drive motor, a drive gear, a driven gear, and a gear belt. The drive motor is located on the side wall of the spraying machine frame, the drive gear is located at the output end of the drive motor, the driven gear is located on the outside of the guide sleeve, and the gear belt is wound between the drive gear and the driven gear.

6. The painting equipment for axle processing according to claim 1, characterized in that: The positioning assembly includes a positioning spring, a magnetic plate, a rubber plug, and an annular electromagnet. Multiple sets of the positioning springs are located on the side of the spraying frame away from the guide sleeve. The magnetic plate is located on the side of the positioning spring away from the spraying frame. The rubber plug is located on the side of the magnetic plate near the positioning opening. The annular electromagnet is located on the side wall of the spraying frame outside the positioning spring, and the annular electromagnet is arranged opposite to the magnetic plate.

7. The painting equipment for axle processing according to claim 1, characterized in that: The rotary joint is connected to the guide tube shaft.

8. The painting equipment for axle processing according to claim 4, characterized in that: The filter assembly includes a filter layer and a one-way air intake valve. The filter layer is located on the inner wall of the top of the negative pressure box, and multiple sets of the one-way air intake valves are connected and located on the upper wall of the negative pressure box.

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