Axle driving shaft surface spraying device

Abstract

An axle drive shaft surface spraying device relates to the technical field of spraying devices and comprises a spraying chamber, a workpiece inlet and outlet is formed in the end of the spraying chamber, a supporting plate is slidably arranged on the inner wall of the spraying chamber, a sealing plate is fixedly arranged at the end of the supporting plate, and a fixed U-shaped frame fixedly arranged and a plurality of movable U-shaped frames horizontally arranged in a sliding mode are arranged at the top of the supporting plate. Clamping boxes are rotationally arranged on the opposite inner walls of the fixed U-shaped frame and the movable U-shaped frame correspondingly, sliding positioning columns are arranged at the opposite ends of the clamping boxes in a penetrating mode correspondingly, a lifting plate is vertically arranged below the clamping boxes in a lifting mode, a plurality of fixing rods are fixedly arranged at the ends of the fixed U-shaped frame and the movable U-shaped frame correspondingly, and a plurality of avoiding grooves are formed in the end of the movable U-shaped frame. And one end of the fixed rod extends into the avoiding groove of the movable U-shaped frame adjacent to the fixed rod and is fixedly connected with a stop plate. The problem that an existing spraying device is low in paint transfer rate is solved; and the feeding preparation procedure and the discharging post-treatment procedure are complex.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spraying devices, in particular to a surface spraying device for axle driving shafts. BACKGROUND

[0002] An axle driving shaft is a key component of a vehicle transmission system, mainly composed of a shaft tube and universal joint yokes at both ends. Its core purpose is to stably transmit power to the wheels to ensure reliable driving of the vehicle under various complex road conditions. To cope with adverse environments such as rain and mud, and to prevent the axle driving shaft from failing due to rust or aging, the surface of the axle driving shaft usually needs to be treated with a sprayed coating. The spraying area mainly covers the outer wall surfaces of the shaft tube and universal joint yokes to form an effective protective layer. However, the inner wall surfaces of the universal joint yokes, as the core movement mating surfaces, are usually not sprayed as spraying them can cause coating accumulation and abnormal mating clearance, leading to component jamming or movement interference.

[0003] The existing spraying device has gradually exposed its shortcomings during use, mainly in the following aspects: First, the paint transfer rate is low. Specifically, when spraying the axle driving shaft, the axle driving shaft needs to be placed on the spraying table and clamped and fixed by a rotating tool. The rotating tool drives it to rotate at a constant speed, and the surface is sprayed by a paint spray gun. To avoid interference between adjacent axle driving shafts during rotation, sufficient clearance must be maintained between the workpieces. When the spray gun sprays paint, some paint will directly pass through the clearance between the axle driving shafts and fall into the non-sprayed area. This not only causes a large amount of paint waste, but also significantly reduces the paint transfer rate during the spraying process, resulting in increased production costs.

[0004] Second, the loading preparation process and unloading post-processing process are complex. Specifically, since the inner wall surfaces of the universal joint yokes at both ends of the axle driving shaft are the core movement mating surfaces, they need to be protected during the spraying process. Therefore, before loading, the area needs to be shielded using masking tape. After the spraying process is completed and the workpiece is unloaded, the tape needs to be removed. Therefore, the loading preparation process and unloading post-processing process are complex.

[0005] In summary, the existing technology has obvious disadvantages and defects in actual use, so it needs to be improved. SUMMARY

[0006] In view of the defects in the prior art, the technical problem to be solved by the present application is to provide a surface spraying device for axle driving shafts. The device can arrange the axle driving shafts at a minimum distance when spraying them, thereby maximizing the hollow area between the workpieces, reducing paint waste, and improving the paint transfer rate. The device can shield the inner wall surface of the end universal joint fork of the axle driving shaft when the axle driving shaft completes the feeding positioning, the coating cannot be sprayed to the area during the spraying process, and thus the steps of pre-pasting shielding adhesive tape and subsequent peeling and cleaning are omitted, and the preparation process before feeding and the processing flow after discharging are simplified.

[0007] To solve the above problems, the present application provides the following technical solutions: The surface spraying device of the axle driving shaft comprises a spraying chamber, a workpiece inlet and outlet are arranged at the end of the spraying chamber, a supporting plate is slidably arranged on the inner wall of the spraying chamber, a closing plate is fixedly arranged at the end of the supporting plate, a fixed U-shaped frame and a plurality of horizontally slidably arranged movable U-shaped frames are fixedly arranged on the top of the supporting plate, clamping boxes are rotatably arranged on the opposite inner walls of the fixed U-shaped frame and the movable U-shaped frames, positioning columns are slidably arranged through the opposite ends of the clamping boxes, a lifting plate is vertically arranged below the clamping boxes, a plurality of fixed rods are fixedly arranged at the ends of the fixed U-shaped frame and the movable U-shaped frames, a plurality of avoiding grooves are arranged at the ends of the movable U-shaped frames, one end of the fixed rod extends into the avoiding groove of the adjacent movable U-shaped frame and is fixedly connected with a stop plate, and a spraying and drying assembly for spraying and drying the axle driving shaft is arranged on the top of the spraying chamber.

[0008] As an optimized scheme, the spraying and drying assembly comprises a movable support, two sliding blocks are slidably arranged on the top of the spraying chamber, the movable support is fixedly connected with the sliding blocks, a plurality of coating spray guns and air distribution boxes are fixedly and penetratively arranged on the top of the movable support, the coating spray guns and the air distribution boxes are alternately arranged, a plurality of exhaust holes are arranged on the bottom of the air distribution box, the coating spray guns are connected with an external coating pressure tank, and the air distribution boxes are communicated with an external industrial hot air machine.

[0009] As an optimized scheme, an adjusting motor is fixedly arranged at one end of the fixed U-shaped frame and the movable U-shaped frame, the output shaft of the adjusting motor is fixedly connected with one of the clamping boxes, and a rotating shaft is rotatably arranged through the other end of the fixed U-shaped frame and the movable U-shaped frame, and the rotating shaft is fixedly connected with the other clamping box.

[0010] As an optimized scheme, a connecting plate is horizontally and movably arranged at the end of the fixed U-shaped frame and the movable U-shaped frame, a positioning shaft is fixedly arranged at the upper end of the connecting plate, an external spline is arranged on the outer wall of the positioning shaft, and an internal spline is arranged at the end of the rotating shaft.

[0011] As an optimized scheme, a plurality of driving telescopic cylinders are fixedly arranged on the inner walls of the fixed U-shaped frame and the movable U-shaped frame, and the telescopic ends of the driving telescopic cylinders are fixedly connected with the connecting plates.

[0012] As an optimized scheme, the inner wall of the clamping box is slidably provided with a moving plate, the end of the moving plate is fixedly provided with two driving plates arranged obliquely, one end of the driving plate obliquely penetrates a positioning column and is slidably connected with the positioning column, the inner wall of the clamping box is fixedly provided with an embedded telescopic cylinder, and the telescopic end of the embedded telescopic cylinder is fixedly connected with the moving plate.

[0013] As an optimized scheme, the lower inner wall of the spraying chamber is fixedly provided with a partition plate, the top of the partition plate is fixedly provided with a plurality of electric control telescopic cylinders, and the telescopic ends of the electric control telescopic cylinders are fixedly connected with the sealing plate.

[0014] As an optimized scheme, the opposite inner walls of the fixed U-shaped frame and the movable U-shaped frame are fixedly provided with lifting telescopic cylinders, and the telescopic ends of the lifting telescopic cylinders are fixedly connected with lifting plates.

[0015] As an optimized scheme, the bottom of the supporting plate is fixedly provided with a control telescopic cylinder, and the telescopic end of the control telescopic cylinder is fixedly connected with the movable U-shaped frame at the edge.

[0016] As an optimized scheme, the top of the spraying chamber is provided with two lead screws, the top of the spraying chamber is fixedly provided with fixed plates at the positions of the two ends of the lead screws, the two ends of the lead screw are rotationally connected with the two fixed plates correspondingly, the lead screw penetrates a sliding block and is threadedly connected with the sliding block, the ends of the two fixed plates are fixedly provided with servo motors, and the output shafts of the servo motors are fixedly connected with the lead screws.

[0017] Compared with the prior art, the present application has the following beneficial effects: 1. When feeding, the lifting telescopic cylinder drives the lifting plate to move upward to a preset height, the universal joint yokes at the two ends of the axle drive shaft are respectively inserted into the two clamping boxes in the fixed U-shaped frame or the movable U-shaped frame, until the universal joint yokes at the two ends of the axle drive shaft are in abutment with the lifting plate, the embedded telescopic cylinder drives the moving plate and the driving plate to move horizontally, the positioning column slides outward, the positioning column leaks out of the clamping box and penetrates the hole of the universal joint yoke (the positioning column protrudes from the universal joint yoke), thereby clamping and fixing the axle drive shaft, after the axle drive shaft is clamped on the fixed U-shaped frame and the movable U-shaped frame, the lifting plate is reset, the electric control telescopic cylinder drives the sealing plate and the supporting plate to move into the spraying chamber, until the sealing plate seals the inlet and outlet of the workpiece, after the spraying and drying of the axle drive shaft in the spraying chamber are completed, the above process is operated in reverse order to take down the processed axle drive shaft, in the process of spraying the axle drive shaft, the clamping box and the positioning column can shield the inner wall surface and the hole of the universal joint yokes at the two ends of the axle drive shaft, preventing being sprayed, the device can shield and protect the inner wall surface of the universal joint yoke at the end of the axle drive shaft when the axle drive shaft is positioned after feeding, the coating cannot be sprayed to the area during the spraying process, thereby the steps of pre-pasting shielding adhesive tape and subsequent peeling and cleaning are omitted, and the preparation process before feeding and the processing flow after discharging are simplified. 2. When the axle drive shaft completes the material loading and is ready for spraying, the drive telescopic cylinder moves the connecting plate horizontally, disengaging the positioning shaft from the rotating shaft, thus releasing the restriction on the rotating shaft. The adjusting motor drives the clamping box and the axle drive shaft to rotate until the narrow end face of the axle drive shaft is positioned on both the upper and lower sides. The telescopic cylinder is then controlled to move the outermost movable U-shaped frame towards the fixed U-shaped frame. After the axle drive shaft on the outermost movable U-shaped frame contacts the axle drive shaft on the second adjacent movable U-shaped frame, it pushes the second movable U-shaped frame to slide, and so on, until the axle drive shaft on the last movable U-shaped frame contacts the axle drive shaft on the fixed U-shaped frame. At this point, all movable U-shaped frames stop moving, and all axle drive shafts are arranged at the minimum distance (e.g., Figure 11 As shown), the hollow area between two adjacent axle drive shafts is minimized. The servo motor drives the moving bracket to move horizontally, and all paint spray guns spray the upper narrow side of the axle drive shaft. Then, the telescopic cylinder is controlled to drive the outermost moving U-shaped frame to reset. With the cooperation of the fixed rod and the stop plate, the remaining moving U-shaped frames are reset. The adjusting motor drives the axle drive shaft to rotate 180°, and the above process is repeated to spray the lower narrow side of the axle drive shaft. At this time, the shaft tube of the axle drive shaft is finished being sprayed. Then, the moving U-shaped frame is reset again, and the adjusting motor drives the axle drive shaft to rotate 90°. At this time, the wide end face of the axle drive shaft is located on the upper and lower sides. When the telescopic cylinder drives the outermost moving U-shaped frame to slide, the positioning post on the outermost moving U-shaped frame contacts the positioning post on the second adjacent moving U-shaped frame, pushing the second moving U-shaped frame to slide. This continues until the positioning post on the last moving U-shaped frame contacts the positioning post on the fixed U-shaped frame, at which point all moving U-shaped frames stop moving. At this time, the universal joint forks on all axle drive shafts are arranged at a very small distance (e.g., Figure 12 As shown, two paint spray guns located on the side spray the upper wide surface of the universal joint forks at both ends of the axle drive shaft. Then, the U-shaped frame is moved back to its original position, and the motor is adjusted to drive the axle drive shaft to rotate 180°. The above process is repeated to spray the lower wide surface of the universal joint forks at both ends of the axle drive shaft. This completes the spraying process of the axle drive shaft. When spraying the axle drive shaft, this device can arrange the axle drive shaft with the minimum distance, minimize the hollow area between the workpieces, reduce paint waste, and improve the paint transfer rate. 3. After the axle drive shaft is painted, the telescopic cylinder is controlled to reset all the moving U-shaped frames, the motor is adjusted to drive the axle drive shaft to rotate, and at the same time, the servo motor drives the moving bracket to move back and forth. The exhaust holes on the air distribution box continuously blow hot air onto the surface of the axle drive shaft to dry it. During the drying process, the axle drive shaft rotates to ensure uniform heating and avoid local overheating or undried areas. 4. The positioning shaft can restrict the rotation shaft. When loading and unloading materials, the clamping box needs to be fixed. At this time, the positioning shaft is inserted into the rotation shaft to fix the clamping box. During the spraying and drying process, the clamping box needs to rotate. At this time, the positioning shaft is disengaged from the rotation shaft. Under the drive of the adjusting motor, the two clamping boxes and the fixed clamping axle drive shaft rotate. 5. During the wide-surface spraying process of the universal joint fork of the axle drive shaft, when the moving U-shaped frame moves towards the fixed U-shaped frame, the contact through the positioning pin can prevent direct contact between the sprayed surfaces of adjacent axle drive shafts from damaging the sprayed surface. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the top of the support plate of the present invention; Figure 3 This is a schematic diagram of the internal structure of the movable U-shaped frame of the present invention; Figure 4 This is a cross-sectional view of the movable U-shaped frame and the fixed U-shaped frame of the present invention; Figure 5 This is a schematic diagram of the structure of the spray drying assembly of the present invention; Figure 6 This is a schematic diagram of the internal structure of the spraying chamber of the present invention; Figure 7 This is a schematic diagram of the air distribution box of the present invention; Figure 8 This is a schematic diagram of the positioning shaft and rotating shaft of the present invention; Figure 9 This is a schematic diagram of the internal structure of the clamping box of the present invention; Figure 10 This is a schematic diagram of the axle drive shaft of the present invention; Figure 11 This is a schematic diagram of the structure of the present invention when spraying the narrow surface of the axle drive shaft; Figure 12 This is a schematic diagram of the structure of the present invention when spraying the wide surface of the axle drive shaft.

[0020] In the diagram: 1-Spraying chamber; 2-Workpiece inlet / outlet; 3-Enclosure plate; 4-Support plate; 5-Moving U-shaped frame; 6-Fixed U-shaped frame; 7-Adjusting motor; 8-Clamping box; 9-Lifting plate; 10-Lifting telescopic cylinder; 11-Drive telescopic cylinder; 12-Connecting plate; 13-Positioning shaft; 14-Rotating shaft; 15-Fixed rod; 16-Allowing groove; 17-Stop plate; 18-Built-in telescopic cylinder; 19-Moving plate; 20-Drive plate; 21-Positioning column; 22-Partition plate; 23-Electrically controlled telescopic cylinder; 24-Moving bracket; 25-Paint spray gun; 26-Air distribution box; 27-Spraying and drying assembly; 28-Control telescopic cylinder; 29-Servo motor; 30-Sliding block; 31-Lead screw; 32-Fixed plate; 33-Exhaust port; 34-Axle drive shaft. Detailed Implementation

[0021] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0022] like Figures 1 to 12 As shown, a surface coating device for a vehicle axle drive shaft includes a coating chamber 1. The end of the coating chamber 1 is provided with a workpiece inlet / outlet 2. A support plate 4 is slidably provided on the inner wall of the coating chamber 1. A closing plate 3 is fixedly provided at the end of the support plate 4. A fixed U-shaped frame 6 and several horizontally slidably provided movable U-shaped frames 5 are provided on the top of the support plate 4. A clamping box 8 is rotatably provided on the relative inner walls of the fixed U-shaped frame 6 and the movable U-shaped frame 5. A slidably provided positioning post 21 is provided through the opposite ends of the clamping box 8. A lifting plate 9 is vertically raised and lowered below the clamping box 8. Several fixing rods 15 are fixedly provided at the ends of the fixed U-shaped frame 6 and the movable U-shaped frame 5. Several clearance grooves 16 are provided at the ends of the movable U-shaped frame 5. One end of the fixing rod 15 extends into the clearance groove 16 of the adjacent movable U-shaped frame 5 and is fixedly connected to a stop plate 17. A coating and drying assembly 27 for coating and drying the vehicle axle drive shaft 34 is provided at the top of the coating chamber 1.

[0023] The spray drying assembly 27 includes a movable support 24. Two sliding blocks 30 are slidably provided on the top of the spray chamber 1. The movable support 24 is fixedly connected to the sliding blocks 30. Several paint spray guns 25 and air distribution boxes 26 are fixedly and continuously provided on the top of the movable support 24. The paint spray guns 25 and air distribution boxes 26 are alternately arranged. Several exhaust holes 33 are provided at the bottom of the air distribution box 26. The paint spray guns 25 are connected to an external paint pressure tank. The air distribution box 26 is connected to an external industrial hot air blower.

[0024] An adjusting motor 7 is fixedly installed at one end of both the fixed U-shaped frame 6 and the movable U-shaped frame 5. The output shaft of the adjusting motor 7 is fixedly connected to one of the clamping boxes 8. A rotating shaft 14 is rotatably installed through the other end of both the fixed U-shaped frame 6 and the movable U-shaped frame 5. The rotating shaft 14 is fixedly connected to the other clamping box 8.

[0025] Both the fixed U-shaped frame 6 and the movable U-shaped frame 5 are provided with horizontally movable connecting plates 12 at their ends. The upper end of the connecting plate 12 is fixedly provided with a positioning shaft 13. The outer wall of the positioning shaft 13 is provided with an external spline, and the end of the rotating shaft 14 is provided with an internal spline.

[0026] Both the fixed U-shaped frame 6 and the movable U-shaped frame 5 have several drive telescopic cylinders 11 fixedly installed on their inner walls. The telescopic ends of the drive telescopic cylinders 11 are fixedly connected to the connecting plate 12.

[0027] The inner wall of the clamping box 8 is provided with a movable plate 19. Two inclined drive plates 20 are fixedly provided at the end of the movable plate 19. One end of the drive plate 20 obliquely passes through the positioning column 21 and is slidably connected to it. The inner wall of the clamping box 8 is provided with a built-in telescopic cylinder 18. The telescopic end of the built-in telescopic cylinder 18 is fixedly connected to the movable plate 19.

[0028] A partition 22 is fixedly installed on the lower inner wall of the spraying chamber 1, and several electrically controlled telescopic cylinders 23 are fixedly installed on the top of the partition 22. The telescopic ends of the electrically controlled telescopic cylinders 23 are fixedly connected to the sealing plate 3.

[0029] Both the fixed U-shaped frame 6 and the movable U-shaped frame 5 are fixedly equipped with lifting telescopic cylinders 10 on their respective inner walls, and the telescopic ends of the lifting telescopic cylinders 10 are fixedly connected to the lifting plate 9.

[0030] A control telescopic cylinder 28 is fixedly installed at the bottom of the support plate 4, and the telescopic end of the control telescopic cylinder 28 is fixedly connected to the outermost movable U-shaped frame 5.

[0031] Two lead screws 31 are provided at the top of the spraying chamber 1. Fixed plates 32 are fixedly provided at both ends of the lead screws 31 at the top of the spraying chamber 1. The two ends of the lead screws 31 are rotatably connected to the two fixed plates 32. The lead screws 31 pass through the sliding block 30 and are threadedly connected to it. Servo motors 29 are fixedly provided at the ends of the two fixed plates 32. The output shaft of the servo motor 29 is fixedly connected to the lead screws 31.

[0032] Point A is the universal joint fork of the axle drive shaft 34, and point B is the shaft tube of the axle drive shaft 34.

[0033] The working principle of this device is as follows: During loading, the lifting telescopic cylinder 10 moves the lifting plate 9 upward to a preset height, inserting the universal joint forks at both ends of the axle drive shaft 34 into the two clamping boxes 8 inside the fixed U-shaped frame 6 or the movable U-shaped frame 5, until the universal joint forks at both ends of the axle drive shaft 34 are abutting against the lifting plate 9. The built-in telescopic cylinder 18 then moves the movable plate 19 and the drive plate 20 horizontally, causing the positioning pin 21 to slide outward. The positioning pin 21 protrudes from the clamping box 8 and passes through the hole of the universal joint fork (the positioning pin 21 protrudes from the universal joint fork), thereby clamping and fixing the axle drive shaft 34. After the axle drive shaft 34 is clamped on both the fixed U-shaped frame 6 and the movable U-shaped frame 5, the lifting plate 9 returns to its original position, and the electrically controlled telescopic cylinder 23 moves the closing plate 3 and the support... Plate 4 moves into spray chamber 1 until the sealing plate 3 seals the workpiece inlet and outlet 2. After the axle drive shaft 34 is sprayed and dried in spray chamber 1, the above process can be reversed to remove the processed axle drive shaft 34. During the spraying process of axle drive shaft 34, clamping box 8 and positioning column 21 can shield the inner wall surface and holes of the universal joint fork at both ends of axle drive shaft 34 to prevent them from being sprayed. When the axle drive shaft 34 is loaded and positioned, the device can shield and protect the inner wall surface of the universal joint fork at its end. During the spraying process, the paint cannot be sprayed onto this area, thus eliminating the need for pre-pasting masking tape and subsequent peeling and cleaning steps, simplifying the preparatory process before loading and the processing process after unloading. When the axle drive shaft 34 is loaded and ready for painting, the drive telescopic cylinder 11 drives the connecting plate 12 to move horizontally, the positioning shaft 13 disengages from the rotating shaft 14, thereby releasing the restriction on the rotating shaft 14. The adjusting motor 7 drives the clamping box 8 and the axle drive shaft 34 to rotate until the narrow end face of the axle drive shaft 34 is located on the upper and lower sides. The control telescopic cylinder 28 drives the outermost movable U-shaped frame 5 to slide towards the fixed U-shaped frame 6. After the axle drive shaft 34 on the outermost movable U-shaped frame 5 contacts the axle drive shaft 34 on the second adjacent movable U-shaped frame 5, it pushes the second movable U-shaped frame 5 to slide, and so on, until the axle drive shaft 34 on the last movable U-shaped frame 5 contacts the axle drive shaft 34 on the fixed U-shaped frame 6. At this time, all movable U-shaped frames 5 stop moving. At this time, all axle drive shafts 34 are arranged at the minimum distance (e.g., Figure 11As shown), the hollow area between two adjacent axle drive shafts 34 is the smallest. The servo motor 29 drives the moving bracket 24 to move horizontally. All paint spray guns 25 spray the upper narrow side of the axle drive shaft 34. Then, the telescopic cylinder 28 is controlled to drive the outermost moving U-shaped frame 5 to reset. With the cooperation of the fixed rod 15 and the stop plate 17, the remaining moving U-shaped frames 5 are reset. The adjusting motor 7 drives the axle drive shaft 34 to rotate 180°. The above process is repeated to spray the lower narrow side of the axle drive shaft 34. At this time, the shaft tube of the axle drive shaft 34 is completely sprayed. Then the moving U-shaped frame 5 is sprayed again. Reset, adjust motor 7 to drive axle drive shaft 34 to rotate 90°. At this time, the wide end face of axle drive shaft 34 is located on the upper and lower sides. When control telescopic cylinder 28 drives the outermost moving U-shaped frame 5 to slide, the positioning pin 21 on the outermost moving U-shaped frame 5 contacts the positioning pin 21 on the adjacent second moving U-shaped frame 5, pushing the second moving U-shaped frame 5 to slide, and so on, until the positioning pin 21 on the last moving U-shaped frame 5 contacts the positioning pin 21 on the fixed U-shaped frame 6. At this time, all moving U-shaped frames 5 stop moving. At this time, all universal joint forks on axle drive shaft 34 are arranged at a very small distance (e.g., Figure 12 As shown, two paint spray guns 25 located on the side spray the upper wide surface of the universal joint forks at both ends of the axle drive shaft 34. Then, the U-shaped frame 5 is moved back to its original position, and the motor 7 is adjusted to drive the axle drive shaft 34 to rotate 180°. The above process is repeated to spray the lower wide surface of the universal joint forks at both ends of the axle drive shaft 34. This completes the spraying process of the axle drive shaft 34. When spraying the axle drive shaft 34, this device can arrange it at the minimum distance, minimize the hollow area between the workpieces, reduce paint waste, and improve the paint transfer rate. After the axle drive shaft 34 is sprayed, the telescopic cylinder 28 is controlled to drive all the moving U-shaped frames 5 to reset, the adjusting motor 7 drives the axle drive shaft 34 to rotate, and at the same time, the servo motor 29 drives the moving bracket 24 to move back and forth. The exhaust port 33 on the air distribution box 26 continuously blows hot air onto the surface of the axle drive shaft 34 to dry the axle drive shaft 34. During the drying process, the axle drive shaft 34 rotates to ensure uniform heating and avoid local overheating or undried areas. The positioning shaft 13 can restrict the rotating shaft 14. When loading and unloading materials, the clamping box 8 needs to be fixed. At this time, the positioning shaft 13 is inserted into the rotating shaft 14, thereby fixing the clamping box 8. During the spraying and drying process, the clamping box 8 needs to rotate. At this time, the positioning shaft 13 is disengaged from the rotating shaft 14. Under the drive of the adjusting motor 7, the two clamping boxes 8 and the fixedly clamped axle drive shaft 34 rotate. During the wide-surface spraying process of the universal joint forks at both ends of the axle drive shaft 34, when the movable U-shaped frame 5 moves towards the fixed U-shaped frame 6, the contact through the positioning post 21 can prevent direct contact between the sprayed surfaces of adjacent axle drive shafts 34 and damage to the sprayed surfaces.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for spraying coating the surface of a vehicle axle drive shaft, characterized in that: The system includes a spraying chamber (1), with a workpiece inlet / outlet (2) at one end. A support plate (4) is slidably mounted on the inner wall of the spraying chamber (1). A closing plate (3) is fixedly mounted at the end of the support plate (4). A fixed U-shaped frame (6) and several horizontally sliding movable U-shaped frames (5) are fixedly mounted on the top of the support plate (4). A clamping box (8) is rotatably mounted on the relative inner walls of the fixed U-shaped frame (6) and the movable U-shaped frame (5). A slidably mounted positioning column is passed through the relative ends of the clamping boxes (8). 21) A lifting plate (9) is vertically raised and lowered below the clamping box (8). Several fixing rods (15) are fixed at the ends of the fixed U-shaped frame (6) and the movable U-shaped frame (5). Several clearance grooves (16) are provided at the ends of the movable U-shaped frame (5). One end of the fixing rod (15) extends into the clearance groove (16) of the adjacent movable U-shaped frame (5) and is fixedly connected to a stop plate (17). A spraying and drying assembly (27) for spraying and drying the axle drive shaft (34) is provided at the top of the spraying chamber (1).

2. The axle drive shaft surface spraying device according to claim 1, characterized in that: The spray drying assembly (27) includes a movable support (24). Two sliding blocks (30) are slidably provided on the top of the spray chamber (1). The movable support (24) is fixedly connected to the sliding blocks (30). Several paint spray guns (25) and air distribution boxes (26) are fixedly provided through the top of the movable support (24). The paint spray guns (25) and air distribution boxes (26) are alternately arranged. Several exhaust holes (33) are provided at the bottom of the air distribution box (26). The paint spray guns (25) are connected to an external paint pressure tank. The air distribution box (26) is connected to an external industrial hot air blower.

3. The axle drive shaft surface spraying device according to claim 1, characterized in that: One end of the fixed U-shaped frame (6) and the movable U-shaped frame (5) is fixedly provided with an adjusting motor (7). The output shaft of the adjusting motor (7) is fixedly connected to one of the clamping boxes (8). The other end of the fixed U-shaped frame (6) and the movable U-shaped frame (5) is provided with a rotating shaft (14) that is rotatably provided. The rotating shaft (14) is fixedly connected to another clamping box (8).

4. The axle drive shaft surface spraying device according to claim 3, characterized in that: Both the fixed U-shaped frame (6) and the movable U-shaped frame (5) are provided with horizontally movable connecting plates (12) at their ends. The upper end of the connecting plate (12) is fixedly provided with a positioning shaft (13). The outer wall of the positioning shaft (13) is provided with an external spline, and the end of the rotating shaft (14) is provided with an internal spline.

5. The axle drive shaft surface spraying device according to claim 4, characterized in that: The inner walls of both the fixed U-shaped frame (6) and the movable U-shaped frame (5) are fixedly provided with a number of drive telescopic cylinders (11), and the telescopic end of the drive telescopic cylinder (11) is fixedly connected to the connecting plate (12).

6. The axle drive shaft surface spraying device according to claim 1, characterized in that: The clamping box (8) has a sliding plate (19) on its inner wall. Two inclined drive plates (20) are fixed at the ends of the moving plate (19). One end of the drive plate (20) passes obliquely through the positioning column (21) and is slidably connected to it. The clamping box (8) has a built-in telescopic cylinder (18) fixedly installed on its inner wall. The telescopic end of the built-in telescopic cylinder (18) is fixedly connected to the moving plate (19).

7. The axle drive shaft surface spraying device according to claim 1, characterized in that: The lower inner wall of the spraying chamber (1) is fixedly provided with a partition (22), and a number of electrically controlled telescopic cylinders (23) are fixedly provided on the top of the partition (22). The telescopic end of the electrically controlled telescopic cylinder (23) is fixedly connected to the sealing plate (3).

8. The axle drive shaft surface spraying device according to claim 1, characterized in that: The inner walls of the fixed U-shaped frame (6) and the movable U-shaped frame (5) are both fixedly provided with lifting telescopic cylinders (10), and the telescopic end of the lifting telescopic cylinder (10) is fixedly connected to the lifting plate (9).

9. The axle drive shaft surface spraying device according to claim 1, characterized in that: The bottom of the support plate (4) is fixedly provided with a control telescopic cylinder (28), and the telescopic end of the control telescopic cylinder (28) is fixedly connected to the outermost movable U-shaped frame (5).

10. The axle drive shaft surface spraying device according to claim 2, characterized in that: The top of the spraying chamber (1) is provided with two lead screws (31). Fixed plates (32) are fixedly provided at both ends of the lead screws (31) at the top of the spraying chamber (1). The two ends of the lead screws (31) are rotatably connected to the two fixed plates (32). The lead screws (31) pass through the sliding block (30) and are threadedly connected to it. Servo motors (29) are fixedly provided at the ends of the two fixed plates (32). The output shaft of the servo motors (29) is fixedly connected to the lead screws (31).

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